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initial message templates support
[claws.git] / src / gtkstext.c
blob0129105ce22c586532a33778bfb64dfe83487082
1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
18 */
19
20 /*
21 * Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
25 */
26
27 /*
28 * Modified by the Sylpheed Team and others 2001. Interesting
29 * parts are marked using comment block following this one.
30 * This modification is based on the GtkSText of GTK 1.2.8
31 */
32
33 /* SYLPHEED:
34 * comment here
35 */
36
37 #ifdef HAVE_CONFIG_H
38 # include "config.h"
39 #endif
40
41 #include <ctype.h>
42 #include <string.h>
43 #include <gdk/gdkkeysyms.h>
44 #include <gdk/gdki18n.h>
45 #include <gtk/gtkmain.h>
46 #include <gtk/gtkselection.h>
47 #include <gtk/gtksignal.h>
48 #include <gtkstext.h>
49
50 /* SYLPHEED:
51 * compile time settings
52 */
53 #define INITIAL_BUFFER_SIZE 1024
54 #define INITIAL_LINE_CACHE_SIZE 256
55 #define MIN_GAP_SIZE 256
56
57 /* SYLPHEED:
58 * intending to introduce a paragraph delimiter '\r' because
59 * '\r' are being stripped by sylpheed
60 */
61 #define LINE_DELIM '\n'
62 #define MIN_TEXT_WIDTH_LINES 20
63 #define MIN_TEXT_HEIGHT_LINES 10
64 #define TEXT_BORDER_ROOM 1
65 #define LINE_WRAP_ROOM 8 /* The bitmaps are 6 wide. */
66 #define DEFAULT_TAB_STOP_WIDTH 4
67 #define SCROLL_PIXELS 5
68 #define KEY_SCROLL_PIXELS 10
69 #define SCROLL_TIME 100
70 #define FREEZE_LENGTH 1024
71
72
73 /* Freeze text when inserting or deleting more than this many characters */
74
75 /* SYLPHEED:
76 * could also mark paragraphs using marks, but don't know anything yet
77 * about consistency when characters are removed
78 */
79 #define SET_PROPERTY_MARK(m, p, o) do { \
80 (m)->property = (p); \
81 (m)->offset = (o); \
82 } while (0)
83 #define MARK_CURRENT_PROPERTY(mark) ((TextProperty*)(mark)->property->data)
84 #define MARK_NEXT_PROPERTY(mark) ((TextProperty*)(mark)->property->next->data)
85 #define MARK_PREV_PROPERTY(mark) ((TextProperty*)((mark)->property->prev ? \
86 (mark)->property->prev->data \
87 : NULL))
88 #define MARK_PREV_LIST_PTR(mark) ((mark)->property->prev)
89 #define MARK_LIST_PTR(mark) ((mark)->property)
90 #define MARK_NEXT_LIST_PTR(mark) ((mark)->property->next)
91 #define MARK_OFFSET(mark) ((mark)->offset)
92 #define MARK_PROPERTY_LENGTH(mark) (MARK_CURRENT_PROPERTY(mark)->length)
93
94
95 #define MARK_CURRENT_FONT(text, mark) \
96 ((MARK_CURRENT_PROPERTY(mark)->flags & PROPERTY_FONT) ? \
97 MARK_CURRENT_PROPERTY(mark)->font->gdk_font : \
98 GTK_WIDGET (text)->style->font)
99 #define MARK_CURRENT_FORE(text, mark) \
100 ((MARK_CURRENT_PROPERTY(mark)->flags & PROPERTY_FOREGROUND) ? \
101 &MARK_CURRENT_PROPERTY(mark)->fore_color : \
102 &((GtkWidget *)text)->style->text[((GtkWidget *)text)->state])
103 #define MARK_CURRENT_BACK(text, mark) \
104 ((MARK_CURRENT_PROPERTY(mark)->flags & PROPERTY_BACKGROUND) ? \
105 &MARK_CURRENT_PROPERTY(mark)->back_color : \
106 &((GtkWidget *)text)->style->base[((GtkWidget *)text)->state])
107 #define MARK_CURRENT_TEXT_FONT(text, mark) \
108 ((MARK_CURRENT_PROPERTY(mark)->flags & PROPERTY_FONT) ? \
109 MARK_CURRENT_PROPERTY(mark)->font : \
110 text->current_font)
111
112 #define TEXT_LENGTH(t) ((t)->text_end - (t)->gap_size)
113 #define FONT_HEIGHT(f) ((f)->ascent + (f)->descent)
114 #define LINE_HEIGHT(l) ((l).font_ascent + (l).font_descent)
115 #define LINE_CONTAINS(l, i) ((l).start.index <= (i) && (l).end.index >= (i))
116 #define LINE_STARTS_AT(l, i) ((l).start.index == (i))
117 #define LINE_START_PIXEL(l) ((l).tab_cont.pixel_offset)
118 #define LAST_INDEX(t, m) ((m).index == TEXT_LENGTH(t))
119 #define CACHE_DATA(c) (*(LineParams*)(c)->data)
120
121 enum {
122 ARG_0,
123 ARG_HADJUSTMENT,
124 ARG_VADJUSTMENT,
125 ARG_LINE_WRAP,
126 ARG_WORD_WRAP
127 };
128
129 typedef struct _TextProperty TextProperty;
130 typedef struct _TabStopMark TabStopMark;
131 typedef struct _PrevTabCont PrevTabCont;
132 typedef struct _FetchLinesData FetchLinesData;
133 typedef struct _LineParams LineParams;
134 typedef struct _SetVerticalScrollData SetVerticalScrollData;
135
136 /* SYLPHEED:
137 * line callback
138 */
139 typedef gint (*LineIteratorFunction) (GtkSText* text, LineParams* lp, void* data);
140
141 typedef enum
142 {
143 FetchLinesPixels,
144 FetchLinesCount
145 } FLType;
146
147 struct _SetVerticalScrollData {
148 gint pixel_height;
149 gint last_didnt_wrap;
150 gint last_line_start;
151 GtkSPropertyMark mark;
152 };
153
154 struct _GtkSTextFont
155 {
156 /* The actual font. */
157 GdkFont *gdk_font;
158 guint ref_count;
159
160 gint16 char_widths[256];
161 };
162
163 typedef enum {
164 PROPERTY_FONT = 1 << 0,
165 PROPERTY_FOREGROUND = 1 << 1,
166 PROPERTY_BACKGROUND = 1 << 2
167 } TextPropertyFlags;
168
169 struct _TextProperty
170 {
171 /* Font. */
172 GtkSTextFont* font;
173
174 /* Background Color. */
175 GdkColor back_color;
176
177 /* Foreground Color. */
178 GdkColor fore_color;
179
180 /* Show which properties are set */
181 TextPropertyFlags flags;
182
183 /* Length of this property. */
184 guint length;
185 };
186
187 struct _TabStopMark
188 {
189 GList* tab_stops; /* Index into list containing the next tab position. If
190 * NULL, using default widths. */
191 gint to_next_tab;
192 };
193
194 struct _PrevTabCont
195 {
196 guint pixel_offset;
197 TabStopMark tab_start;
198 };
199
200 struct _FetchLinesData
201 {
202 GList* new_lines;
203 FLType fl_type;
204 gint data;
205 gint data_max;
206 };
207
208 struct _LineParams
209 {
210 guint font_ascent;
211 guint font_descent;
212 guint pixel_width;
213 guint displayable_chars;
214 guint wraps : 1;
215
216 PrevTabCont tab_cont;
217 PrevTabCont tab_cont_next;
218
219 GtkSPropertyMark start;
220 GtkSPropertyMark end;
221 };
222
223
224 static void gtk_stext_class_init (GtkSTextClass *klass);
225 static void gtk_stext_set_arg (GtkObject *object,
226 GtkArg *arg,
227 guint arg_id);
228 static void gtk_stext_get_arg (GtkObject *object,
229 GtkArg *arg,
230 guint arg_id);
231 static void gtk_stext_init (GtkSText *text);
232 static void gtk_stext_destroy (GtkObject *object);
233 static void gtk_stext_finalize (GtkObject *object);
234 static void gtk_stext_realize (GtkWidget *widget);
235 static void gtk_stext_unrealize (GtkWidget *widget);
236 static void gtk_stext_style_set (GtkWidget *widget,
237 GtkStyle *previous_style);
238 static void gtk_stext_state_changed (GtkWidget *widget,
239 GtkStateType previous_state);
240 static void gtk_stext_draw_focus (GtkWidget *widget);
241 static void gtk_stext_size_request (GtkWidget *widget,
242 GtkRequisition *requisition);
243 static void gtk_stext_size_allocate (GtkWidget *widget,
244 GtkAllocation *allocation);
245 static void gtk_stext_adjustment (GtkAdjustment *adjustment,
246 GtkSText *text);
247 static void gtk_stext_disconnect (GtkAdjustment *adjustment,
248 GtkSText *text);
249
250 static void gtk_stext_insert_text (GtkEditable *editable,
251 const gchar *new_text,
252 gint new_text_length,
253 gint *position);
254 static void gtk_stext_delete_text (GtkEditable *editable,
255 gint start_pos,
256 gint end_pos);
257 static void gtk_stext_update_text (GtkEditable *editable,
258 gint start_pos,
259 gint end_pos);
260 static gchar *gtk_stext_get_chars (GtkEditable *editable,
261 gint start,
262 gint end);
263 static void gtk_stext_set_selection (GtkEditable *editable,
264 gint start,
265 gint end);
266 static void gtk_stext_real_set_editable (GtkEditable *editable,
267 gboolean is_editable);
268
269 /* Event handlers */
270 static void gtk_stext_draw (GtkWidget *widget,
271 GdkRectangle *area);
272 static gint gtk_stext_expose (GtkWidget *widget,
273 GdkEventExpose *event);
274 static gint gtk_stext_button_press (GtkWidget *widget,
275 GdkEventButton *event);
276 static gint gtk_stext_button_release (GtkWidget *widget,
277 GdkEventButton *event);
278 static gint gtk_stext_motion_notify (GtkWidget *widget,
279 GdkEventMotion *event);
280 static gint gtk_stext_key_press (GtkWidget *widget,
281 GdkEventKey *event);
282 static gint gtk_stext_focus_in (GtkWidget *widget,
283 GdkEventFocus *event);
284 static gint gtk_stext_focus_out (GtkWidget *widget,
285 GdkEventFocus *event);
286
287 static void move_gap (GtkSText* text, guint index);
288 static void make_forward_space (GtkSText* text, guint len);
289
290 /* Property management */
291 static GtkSTextFont* get_text_font (GdkFont* gfont);
292 static void text_font_unref (GtkSTextFont *text_font);
293
294 static void insert_text_property (GtkSText* text, GdkFont* font,
295 GdkColor *fore, GdkColor* back, guint len);
296 static TextProperty* new_text_property (GtkSText *text, GdkFont* font,
297 GdkColor* fore, GdkColor* back, guint length);
298 static void destroy_text_property (TextProperty *prop);
299 static void init_properties (GtkSText *text);
300 static void realize_property (GtkSText *text, TextProperty *prop);
301 static void realize_properties (GtkSText *text);
302 static void unrealize_property (GtkSText *text, TextProperty *prop);
303 static void unrealize_properties (GtkSText *text);
304
305 static void delete_text_property (GtkSText* text, guint len);
306
307 static guint pixel_height_of (GtkSText* text, GList* cache_line);
308
309 /* Property Movement and Size Computations */
310 static void advance_mark (GtkSPropertyMark* mark);
311 static void decrement_mark (GtkSPropertyMark* mark);
312 static void advance_mark_n (GtkSPropertyMark* mark, gint n);
313 static void decrement_mark_n (GtkSPropertyMark* mark, gint n);
314 static void move_mark_n (GtkSPropertyMark* mark, gint n);
315 static GtkSPropertyMark find_mark (GtkSText* text, guint mark_position);
316 static GtkSPropertyMark find_mark_near (GtkSText* text, guint mark_position, const GtkSPropertyMark* near);
317 static void find_line_containing_point (GtkSText* text, guint point,
318 gboolean scroll);
319
320 /* Display */
321 static void compute_lines_pixels (GtkSText* text, guint char_count,
322 guint *lines, guint *pixels);
323
324 static gint total_line_height (GtkSText* text,
325 GList* line,
326 gint line_count);
327 static LineParams find_line_params (GtkSText* text,
328 const GtkSPropertyMark *mark,
329 const PrevTabCont *tab_cont,
330 PrevTabCont *next_cont);
331 static void recompute_geometry (GtkSText* text);
332 static void insert_expose (GtkSText* text, guint old_pixels, gint nchars, guint new_line_count);
333 static void delete_expose (GtkSText* text,
334 guint nchars,
335 guint old_lines,
336 guint old_pixels);
337 static GdkGC *create_bg_gc (GtkSText *text);
338 static void clear_area (GtkSText *text, GdkRectangle *area);
339 static void draw_line (GtkSText* text,
340 gint pixel_height,
341 LineParams* lp);
342 static void draw_line_wrap (GtkSText* text,
343 guint height);
344 static void draw_cursor (GtkSText* text, gint absolute);
345 static void undraw_cursor (GtkSText* text, gint absolute);
346 static gint drawn_cursor_min (GtkSText* text);
347 static gint drawn_cursor_max (GtkSText* text);
348 static void expose_text (GtkSText* text, GdkRectangle *area, gboolean cursor);
349
350 /* Search and Placement. */
351 static void find_cursor (GtkSText* text,
352 gboolean scroll);
353 static void find_cursor_at_line (GtkSText* text,
354 const LineParams* start_line,
355 gint pixel_height);
356 static void find_mouse_cursor (GtkSText* text, gint x, gint y);
357
358 /* Scrolling. */
359 static void adjust_adj (GtkSText* text, GtkAdjustment* adj);
360 static void scroll_up (GtkSText* text, gint diff);
361 static void scroll_down (GtkSText* text, gint diff);
362 static void scroll_int (GtkSText* text, gint diff);
363
364 static void process_exposes (GtkSText *text);
365
366 /* Cache Management. */
367 static void free_cache (GtkSText* text);
368 static GList* remove_cache_line (GtkSText* text, GList* list);
369
370 /* Key Motion. */
371 static void move_cursor_buffer_ver (GtkSText *text, int dir);
372 static void move_cursor_page_ver (GtkSText *text, int dir);
373 static void move_cursor_ver (GtkSText *text, int count);
374 static void move_cursor_hor (GtkSText *text, int count);
375
376 /* SYLPHEED
377 */
378 static void move_cursor_to_display_row_end (GtkSText *text);
379 static void move_cursor_to_display_row_start (GtkSText *text);
380 static void move_cursor_to_display_row_up (GtkSText *text);
381 static void move_cursor_to_display_row_down (GtkSText *text);
382 static void reset_persist_col_pos (GtkSText *text);
383
384 /* Binding actions */
385 static void gtk_stext_move_cursor (GtkEditable *editable,
386 gint x,
387 gint y);
388 static void gtk_stext_move_word (GtkEditable *editable,
389 gint n);
390 static void gtk_stext_move_page (GtkEditable *editable,
391 gint x,
392 gint y);
393 static void gtk_stext_move_to_row (GtkEditable *editable,
394 gint row);
395 static void gtk_stext_move_to_column (GtkEditable *editable,
396 gint row);
397 static void gtk_stext_kill_char (GtkEditable *editable,
398 gint direction);
399 static void gtk_stext_kill_word (GtkEditable *editable,
400 gint direction);
401 static void gtk_stext_kill_line (GtkEditable *editable,
402 gint direction);
403
404 /* To be removed */
405 static void gtk_stext_move_forward_character (GtkSText *text);
406 static void gtk_stext_move_backward_character (GtkSText *text);
407 static void gtk_stext_move_forward_word (GtkSText *text);
408 static void gtk_stext_move_backward_word (GtkSText *text);
409 static void gtk_stext_move_beginning_of_line (GtkSText *text);
410 static void gtk_stext_move_end_of_line (GtkSText *text);
411 static void gtk_stext_move_next_line (GtkSText *text);
412 static void gtk_stext_move_previous_line (GtkSText *text);
413
414 static void gtk_stext_delete_forward_character (GtkSText *text);
415 static void gtk_stext_delete_backward_character (GtkSText *text);
416 static void gtk_stext_delete_forward_word (GtkSText *text);
417 static void gtk_stext_delete_backward_word (GtkSText *text);
418 static void gtk_stext_delete_line (GtkSText *text);
419 static void gtk_stext_delete_to_line_end (GtkSText *text);
420 static void gtk_stext_select_word (GtkSText *text,
421 guint32 time);
422 static void gtk_stext_select_line (GtkSText *text,
423 guint32 time);
424
425 static void gtk_stext_set_position (GtkEditable *editable,
426 gint position);
427
428
429 /* SYLPHEED:
430 * cursor timer
431 */
432 static void gtk_stext_enable_blink (GtkSText *text);
433 static void gtk_stext_disable_blink (GtkSText *text);
434
435 /* #define DEBUG_GTK_STEXT */
436
437 #if defined(DEBUG_GTK_STEXT) && defined(__GNUC__)
438 /* Debugging utilities. */
439 static void gtk_stext_assert_mark (GtkSText *text,
440 GtkSPropertyMark *mark,
441 GtkSPropertyMark *before,
442 GtkSPropertyMark *after,
443 const gchar *msg,
444 const gchar *where,
445 gint line);
446
447 static void gtk_stext_assert (GtkSText *text,
448 const gchar *msg,
449 gint line);
450 static void gtk_stext_show_cache_line (GtkSText *text, GList *cache,
451 const char* what, const char* func, gint line);
452 static void gtk_stext_show_cache (GtkSText *text, const char* func, gint line);
453 static void gtk_stext_show_adj (GtkSText *text,
454 GtkAdjustment *adj,
455 const char* what,
456 const char* func,
457 gint line);
458 static void gtk_stext_show_props (GtkSText* test,
459 const char* func,
460 int line);
461
462 #define TDEBUG(args) g_message args
463 #define TEXT_ASSERT(text) gtk_stext_assert (text,__PRETTY_FUNCTION__,__LINE__)
464 #define TEXT_ASSERT_MARK(text,mark,msg) gtk_stext_assert_mark (text,mark, \
465 __PRETTY_FUNCTION__,msg,__LINE__)
466 #define TEXT_SHOW(text) gtk_stext_show_cache (text, __PRETTY_FUNCTION__,__LINE__)
467 #define TEXT_SHOW_LINE(text,line,msg) gtk_stext_show_cache_line (text,line,msg,\
468 __PRETTY_FUNCTION__,__LINE__)
469 #define TEXT_SHOW_ADJ(text,adj,msg) gtk_stext_show_adj (text,adj,msg, \
470 __PRETTY_FUNCTION__,__LINE__)
471 #else
472 #define TDEBUG(args)
473 #define TEXT_ASSERT(text)
474 #define TEXT_ASSERT_MARK(text,mark,msg)
475 #define TEXT_SHOW(text)
476 #define TEXT_SHOW_LINE(text,line,msg)
477 #define TEXT_SHOW_ADJ(text,adj,msg)
478 #endif
479
480 #define AHX_DEBUG
481 #if defined(AHX_DEBUG)
482 # define XDEBUG(args) g_message args
483 #else
484 # define XDEBUG(args)
485 #endif /* AHX_DEBUG */
486
487 /* Memory Management. */
488 static GMemChunk *params_mem_chunk = NULL;
489 static GMemChunk *text_property_chunk = NULL;
490
491 static GtkWidgetClass *parent_class = NULL;
492
493
494 static const GtkTextFunction control_keys[26] =
495 {
496 (GtkTextFunction)gtk_stext_move_beginning_of_line, /* a */
497 (GtkTextFunction)gtk_stext_move_backward_character, /* b */
498 (GtkTextFunction)gtk_editable_copy_clipboard, /* c */
499 (GtkTextFunction)gtk_stext_delete_forward_character, /* d */
500 (GtkTextFunction)gtk_stext_move_end_of_line, /* e */
501 (GtkTextFunction)gtk_stext_move_forward_character, /* f */
502 NULL, /* g */
503 (GtkTextFunction)gtk_stext_delete_backward_character, /* h */
504 NULL, /* i */
505 NULL, /* j */
506 (GtkTextFunction)gtk_stext_delete_to_line_end, /* k */
507 NULL, /* l */
508 NULL, /* m */
509 (GtkTextFunction)gtk_stext_move_next_line, /* n */
510 NULL, /* o */
511 (GtkTextFunction)gtk_stext_move_previous_line, /* p */
512 NULL, /* q */
513 NULL, /* r */
514 NULL, /* s */
515 NULL, /* t */
516 (GtkTextFunction)gtk_stext_delete_line, /* u */
517 (GtkTextFunction)gtk_editable_paste_clipboard, /* v */
518 (GtkTextFunction)gtk_stext_delete_backward_word, /* w */
519 (GtkTextFunction)gtk_editable_cut_clipboard, /* x */
520 NULL, /* y */
521 NULL, /* z */
522 };
523
524 static const GtkTextFunction alt_keys[26] =
525 {
526 NULL, /* a */
527 (GtkTextFunction)gtk_stext_move_backward_word, /* b */
528 NULL, /* c */
529 (GtkTextFunction)gtk_stext_delete_forward_word, /* d */
530 NULL, /* e */
531 (GtkTextFunction)gtk_stext_move_forward_word, /* f */
532 NULL, /* g */
533 NULL, /* h */
534 NULL, /* i */
535 NULL, /* j */
536 NULL, /* k */
537 NULL, /* l */
538 NULL, /* m */
539 NULL, /* n */
540 NULL, /* o */
541 NULL, /* p */
542 NULL, /* q */
543 NULL, /* r */
544 NULL, /* s */
545 NULL, /* t */
546 NULL, /* u */
547 NULL, /* v */
548 NULL, /* w */
549 NULL, /* x */
550 NULL, /* y */
551 NULL, /* z */
552 };
553
554
555 /* line_arrow.xbm */
556 #define line_arrow_width 6
557 #define line_arrow_height 9
558 static unsigned char line_arrow_bits[] = {
559 0x00, 0x00, 0x04, 0x0c, 0x18, 0x3f, 0x18, 0x0c, 0x04};
560
561 /* line-wrap.xbm */
562 #define line_wrap_width 6
563 #define line_wrap_height 9
564 static unsigned char line_wrap_bits[] = {
565 0x1e, 0x3e, 0x30, 0x30, 0x39, 0x1f, 0x0f, 0x0f, 0x1f, };
566
567 /**********************************************************************/
568 /* Widget Crap */
569 /**********************************************************************/
570
571 GtkType
572 gtk_stext_get_type (void)
573 {
574 static GtkType text_type = 0;
575
576 if (!text_type)
577 {
578 static const GtkTypeInfo text_info =
579 {
580 "GtkSText",
581 sizeof (GtkSText),
582 sizeof (GtkSTextClass),
583 (GtkClassInitFunc) gtk_stext_class_init,
584 (GtkObjectInitFunc) gtk_stext_init,
585 /* reserved_1 */ NULL,
586 /* reserved_2 */ NULL,
587 (GtkClassInitFunc) NULL,
588 };
589
590 text_type = gtk_type_unique (GTK_TYPE_EDITABLE, &text_info);
591 }
592
593 return text_type;
594 }
595
596 static void
597 gtk_stext_class_init (GtkSTextClass *class)
598 {
599 GtkObjectClass *object_class;
600 GtkWidgetClass *widget_class;
601 GtkEditableClass *editable_class;
602
603 object_class = (GtkObjectClass*) class;
604 widget_class = (GtkWidgetClass*) class;
605 editable_class = (GtkEditableClass*) class;
606 parent_class = gtk_type_class (GTK_TYPE_EDITABLE);
607
608 gtk_object_add_arg_type ("GtkSText::hadjustment",
609 GTK_TYPE_ADJUSTMENT,
610 GTK_ARG_READWRITE | GTK_ARG_CONSTRUCT,
611 ARG_HADJUSTMENT);
612 gtk_object_add_arg_type ("GtkSText::vadjustment",
613 GTK_TYPE_ADJUSTMENT,
614 GTK_ARG_READWRITE | GTK_ARG_CONSTRUCT,
615 ARG_VADJUSTMENT);
616 gtk_object_add_arg_type ("GtkSText::line_wrap",
617 GTK_TYPE_BOOL,
618 GTK_ARG_READWRITE,
619 ARG_LINE_WRAP);
620 gtk_object_add_arg_type ("GtkSText::word_wrap",
621 GTK_TYPE_BOOL,
622 GTK_ARG_READWRITE,
623 ARG_WORD_WRAP);
624
625 object_class->set_arg = gtk_stext_set_arg;
626 object_class->get_arg = gtk_stext_get_arg;
627 object_class->destroy = gtk_stext_destroy;
628 object_class->finalize = gtk_stext_finalize;
629
630 widget_class->realize = gtk_stext_realize;
631 widget_class->unrealize = gtk_stext_unrealize;
632 widget_class->style_set = gtk_stext_style_set;
633 widget_class->state_changed = gtk_stext_state_changed;
634 widget_class->draw_focus = gtk_stext_draw_focus;
635 widget_class->size_request = gtk_stext_size_request;
636 widget_class->size_allocate = gtk_stext_size_allocate;
637 widget_class->draw = gtk_stext_draw;
638 widget_class->expose_event = gtk_stext_expose;
639 widget_class->button_press_event = gtk_stext_button_press;
640 widget_class->button_release_event = gtk_stext_button_release;
641 widget_class->motion_notify_event = gtk_stext_motion_notify;
642 widget_class->key_press_event = gtk_stext_key_press;
643 widget_class->focus_in_event = gtk_stext_focus_in;
644 widget_class->focus_out_event = gtk_stext_focus_out;
645
646 widget_class->set_scroll_adjustments_signal =
647 gtk_signal_new ("set_scroll_adjustments",
648 GTK_RUN_LAST,
649 object_class->type,
650 GTK_SIGNAL_OFFSET (GtkSTextClass, set_scroll_adjustments),
651 gtk_marshal_NONE__POINTER_POINTER,
652 GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
653
654 editable_class->set_editable = gtk_stext_real_set_editable;
655 editable_class->insert_text = gtk_stext_insert_text;
656 editable_class->delete_text = gtk_stext_delete_text;
657
658 editable_class->move_cursor = gtk_stext_move_cursor;
659 editable_class->move_word = gtk_stext_move_word;
660 editable_class->move_page = gtk_stext_move_page;
661 editable_class->move_to_row = gtk_stext_move_to_row;
662 editable_class->move_to_column = gtk_stext_move_to_column;
663
664 editable_class->kill_char = gtk_stext_kill_char;
665 editable_class->kill_word = gtk_stext_kill_word;
666 editable_class->kill_line = gtk_stext_kill_line;
667
668 editable_class->update_text = gtk_stext_update_text;
669 editable_class->get_chars = gtk_stext_get_chars;
670 editable_class->set_selection = gtk_stext_set_selection;
671 editable_class->set_position = gtk_stext_set_position;
672
673 class->set_scroll_adjustments = gtk_stext_set_adjustments;
674 }
675
676 static void
677 gtk_stext_set_arg (GtkObject *object,
678 GtkArg *arg,
679 guint arg_id)
680 {
681 GtkSText *text;
682
683 text = GTK_STEXT (object);
684
685 switch (arg_id)
686 {
687 case ARG_HADJUSTMENT:
688 gtk_stext_set_adjustments (text,
689 GTK_VALUE_POINTER (*arg),
690 text->vadj);
691 break;
692 case ARG_VADJUSTMENT:
693 gtk_stext_set_adjustments (text,
694 text->hadj,
695 GTK_VALUE_POINTER (*arg));
696 break;
697 case ARG_LINE_WRAP:
698 gtk_stext_set_line_wrap (text, GTK_VALUE_BOOL (*arg));
699 break;
700 case ARG_WORD_WRAP:
701 gtk_stext_set_word_wrap (text, GTK_VALUE_BOOL (*arg));
702 break;
703 default:
704 break;
705 }
706 }
707
708 static void
709 gtk_stext_get_arg (GtkObject *object,
710 GtkArg *arg,
711 guint arg_id)
712 {
713 GtkSText *text;
714
715 text = GTK_STEXT (object);
716
717 switch (arg_id)
718 {
719 case ARG_HADJUSTMENT:
720 GTK_VALUE_POINTER (*arg) = text->hadj;
721 break;
722 case ARG_VADJUSTMENT:
723 GTK_VALUE_POINTER (*arg) = text->vadj;
724 break;
725 case ARG_LINE_WRAP:
726 GTK_VALUE_BOOL (*arg) = text->line_wrap;
727 break;
728 case ARG_WORD_WRAP:
729 GTK_VALUE_BOOL (*arg) = text->word_wrap;
730 break;
731 default:
732 arg->type = GTK_TYPE_INVALID;
733 break;
734 }
735 }
736
737 static void
738 gtk_stext_init (GtkSText *text)
739 {
740 GTK_WIDGET_SET_FLAGS (text, GTK_CAN_FOCUS);
741
742 text->text_area = NULL;
743 text->hadj = NULL;
744 text->vadj = NULL;
745 text->gc = NULL;
746 text->bg_gc = NULL;
747 text->line_wrap_bitmap = NULL;
748 text->line_arrow_bitmap = NULL;
749
750 text->use_wchar = FALSE;
751 text->text.ch = g_new (guchar, INITIAL_BUFFER_SIZE);
752 text->text_len = INITIAL_BUFFER_SIZE;
753
754 text->scratch_buffer.ch = NULL;
755 text->scratch_buffer_len = 0;
756
757 text->freeze_count = 0;
758
759 if (!params_mem_chunk)
760 params_mem_chunk = g_mem_chunk_new ("LineParams",
761 sizeof (LineParams),
762 256 * sizeof (LineParams),
763 G_ALLOC_AND_FREE);
764
765 text->default_tab_width = 4;
766 text->tab_stops = NULL;
767
768 text->tab_stops = g_list_prepend (text->tab_stops, (void*)8);
769 text->tab_stops = g_list_prepend (text->tab_stops, (void*)8);
770
771 text->line_start_cache = NULL;
772 text->first_cut_pixels = 0;
773
774 text->line_wrap = TRUE;
775 text->word_wrap = FALSE;
776
777 text->timer = 0;
778 text->button = 0;
779
780 text->current_font = NULL;
781
782 /* SYLPHEED:
783 * timer for blinking cursor
784 */
785 text->cursor_visible = FALSE; /* don't know whether gtktext stores this somewhere */
786 text->cursor_timer_on = TRUE;
787 text->cursor_off_ms = 500;
788 text->cursor_on_ms = 500;
789 text->cursor_timer_id = 0;
790 text->cursor_idle_time_timer_id = 0;
791 text->wrap_rmargin = 0;
792 text->cursor_type = STEXT_CURSOR_LINE;
793 text->persist_column = 0;
794
795 init_properties (text);
796
797 GTK_EDITABLE (text)->editable = FALSE;
798
799 gtk_editable_set_position (GTK_EDITABLE (text), 0);
800 }
801
802 GtkWidget*
803 gtk_stext_new (GtkAdjustment *hadj,
804 GtkAdjustment *vadj)
805 {
806 GtkWidget *text;
807
808 if (hadj)
809 g_return_val_if_fail (GTK_IS_ADJUSTMENT (hadj), NULL);
810 if (vadj)
811 g_return_val_if_fail (GTK_IS_ADJUSTMENT (vadj), NULL);
812
813 text = gtk_widget_new (GTK_TYPE_STEXT,
814 "hadjustment", hadj,
815 "vadjustment", vadj,
816 NULL);
817
818 return text;
819 }
820
821 void
822 gtk_stext_set_word_wrap (GtkSText *text,
823 gint word_wrap)
824 {
825 g_return_if_fail (text != NULL);
826 g_return_if_fail (GTK_IS_STEXT (text));
827
828 text->word_wrap = (word_wrap != FALSE);
829
830 if (GTK_WIDGET_REALIZED (text))
831 {
832 recompute_geometry (text);
833 gtk_widget_queue_draw (GTK_WIDGET (text));
834 }
835 }
836
837 void
838 gtk_stext_set_line_wrap (GtkSText *text,
839 gint line_wrap)
840 {
841 g_return_if_fail (text != NULL);
842 g_return_if_fail (GTK_IS_STEXT (text));
843
844 text->line_wrap = (line_wrap != FALSE);
845
846 if (GTK_WIDGET_REALIZED (text))
847 {
848 recompute_geometry (text);
849 gtk_widget_queue_draw (GTK_WIDGET (text));
850 }
851 }
852
853 void
854 gtk_stext_set_editable (GtkSText *text,
855 gboolean is_editable)
856 {
857 g_return_if_fail (text != NULL);
858 g_return_if_fail (GTK_IS_STEXT (text));
859
860 gtk_editable_set_editable (GTK_EDITABLE (text), is_editable);
861 }
862
863 static void
864 gtk_stext_real_set_editable (GtkEditable *editable,
865 gboolean is_editable)
866 {
867 GtkSText *text;
868
869 g_return_if_fail (editable != NULL);
870 g_return_if_fail (GTK_IS_STEXT (editable));
871
872 text = GTK_STEXT (editable);
873
874 editable->editable = (is_editable != FALSE);
875
876 if (GTK_WIDGET_REALIZED (text))
877 {
878 recompute_geometry (text);
879 gtk_widget_queue_draw (GTK_WIDGET (text));
880 }
881 }
882
883 void
884 gtk_stext_set_adjustments (GtkSText *text,
885 GtkAdjustment *hadj,
886 GtkAdjustment *vadj)
887 {
888 g_return_if_fail (text != NULL);
889 g_return_if_fail (GTK_IS_STEXT (text));
890 if (hadj)
891 g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
892 else
893 hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
894 if (vadj)
895 g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
896 else
897 vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
898
899 if (text->hadj && (text->hadj != hadj))
900 {
901 gtk_signal_disconnect_by_data (GTK_OBJECT (text->hadj), text);
902 gtk_object_unref (GTK_OBJECT (text->hadj));
903 }
904
905 if (text->vadj && (text->vadj != vadj))
906 {
907 gtk_signal_disconnect_by_data (GTK_OBJECT (text->vadj), text);
908 gtk_object_unref (GTK_OBJECT (text->vadj));
909 }
910
911 if (text->hadj != hadj)
912 {
913 text->hadj = hadj;
914 gtk_object_ref (GTK_OBJECT (text->hadj));
915 gtk_object_sink (GTK_OBJECT (text->hadj));
916
917 gtk_signal_connect (GTK_OBJECT (text->hadj), "changed",
918 (GtkSignalFunc) gtk_stext_adjustment,
919 text);
920 gtk_signal_connect (GTK_OBJECT (text->hadj), "value_changed",
921 (GtkSignalFunc) gtk_stext_adjustment,
922 text);
923 gtk_signal_connect (GTK_OBJECT (text->hadj), "disconnect",
924 (GtkSignalFunc) gtk_stext_disconnect,
925 text);
926 gtk_stext_adjustment (hadj, text);
927 }
928
929 if (text->vadj != vadj)
930 {
931 text->vadj = vadj;
932 gtk_object_ref (GTK_OBJECT (text->vadj));
933 gtk_object_sink (GTK_OBJECT (text->vadj));
934
935 gtk_signal_connect (GTK_OBJECT (text->vadj), "changed",
936 (GtkSignalFunc) gtk_stext_adjustment,
937 text);
938 gtk_signal_connect (GTK_OBJECT (text->vadj), "value_changed",
939 (GtkSignalFunc) gtk_stext_adjustment,
940 text);
941 gtk_signal_connect (GTK_OBJECT (text->vadj), "disconnect",
942 (GtkSignalFunc) gtk_stext_disconnect,
943 text);
944 gtk_stext_adjustment (vadj, text);
945 }
946 }
947
948 void
949 gtk_stext_set_point (GtkSText *text,
950 guint index)
951 {
952 g_return_if_fail (text != NULL);
953 g_return_if_fail (GTK_IS_STEXT (text));
954 g_return_if_fail (index <= TEXT_LENGTH (text));
955
956 text->point = find_mark (text, index);
957 }
958
959 guint
960 gtk_stext_get_point (GtkSText *text)
961 {
962 g_return_val_if_fail (text != NULL, 0);
963 g_return_val_if_fail (GTK_IS_STEXT (text), 0);
964
965 return text->point.index;
966 }
967
968 guint
969 gtk_stext_get_length (GtkSText *text)
970 {
971 g_return_val_if_fail (text != NULL, 0);
972 g_return_val_if_fail (GTK_IS_STEXT (text), 0);
973
974 return TEXT_LENGTH (text);
975 }
976
977 void
978 gtk_stext_freeze (GtkSText *text)
979 {
980 g_return_if_fail (text != NULL);
981 g_return_if_fail (GTK_IS_STEXT (text));
982
983 text->freeze_count++;
984 undraw_cursor (text, FALSE);
985 }
986
987 void
988 gtk_stext_thaw (GtkSText *text)
989 {
990 g_return_if_fail (text != NULL);
991 g_return_if_fail (GTK_IS_STEXT (text));
992
993 if (text->freeze_count)
994 if (!(--text->freeze_count) && GTK_WIDGET_REALIZED (text))
995 {
996 recompute_geometry (text);
997 gtk_widget_queue_draw (GTK_WIDGET (text));
998 }
999 draw_cursor (text, FALSE);
1000 }
1001
1002 void
1003 gtk_stext_insert (GtkSText *text,
1004 GdkFont *font,
1005 GdkColor *fore,
1006 GdkColor *back,
1007 const char *chars,
1008 gint nchars)
1009 {
1010 GtkEditable *editable = GTK_EDITABLE (text);
1011 gboolean frozen = FALSE;
1012
1013 gint new_line_count = 1;
1014 guint old_height = 0;
1015 guint length;
1016 guint i;
1017 gint numwcs;
1018
1019 g_return_if_fail (text != NULL);
1020 g_return_if_fail (GTK_IS_STEXT (text));
1021 if (nchars > 0)
1022 g_return_if_fail (chars != NULL);
1023 else
1024 {
1025 if (!nchars || !chars)
1026 return;
1027 nchars = strlen (chars);
1028 }
1029 length = nchars;
1030
1031 if (!text->freeze_count && (length > FREEZE_LENGTH))
1032 {
1033 gtk_stext_freeze (text);
1034 frozen = TRUE;
1035 }
1036
1037 if (!text->freeze_count && (text->line_start_cache != NULL))
1038 {
1039 find_line_containing_point (text, text->point.index, TRUE);
1040 old_height = total_line_height (text, text->current_line, 1);
1041 }
1042
1043 if ((TEXT_LENGTH (text) == 0) && (text->use_wchar == FALSE))
1044 {
1045 GtkWidget *widget;
1046 widget = GTK_WIDGET (text);
1047 gtk_widget_ensure_style (widget);
1048 if ((widget->style) && (widget->style->font->type == GDK_FONT_FONTSET))
1049 {
1050 text->use_wchar = TRUE;
1051 g_free (text->text.ch);
1052 text->text.wc = g_new (GdkWChar, INITIAL_BUFFER_SIZE);
1053 text->text_len = INITIAL_BUFFER_SIZE;
1054 if (text->scratch_buffer.ch)
1055 g_free (text->scratch_buffer.ch);
1056 text->scratch_buffer.wc = NULL;
1057 text->scratch_buffer_len = 0;
1058 }
1059 }
1060
1061 move_gap (text, text->point.index);
1062 make_forward_space (text, length);
1063
1064 if (text->use_wchar)
1065 {
1066 char *chars_nt = (char *)chars;
1067 if (nchars > 0)
1068 {
1069 chars_nt = g_new (char, length+1);
1070 memcpy (chars_nt, chars, length);
1071 chars_nt[length] = 0;
1072 }
1073 numwcs = gdk_mbstowcs (text->text.wc + text->gap_position, chars_nt,
1074 length);
1075 if (chars_nt != chars)
1076 g_free(chars_nt);
1077 if (numwcs < 0)
1078 numwcs = 0;
1079 }
1080 else
1081 {
1082 numwcs = length;
1083 memcpy(text->text.ch + text->gap_position, chars, length);
1084 }
1085
1086 if (!text->freeze_count && (text->line_start_cache != NULL))
1087 {
1088 if (text->use_wchar)
1089 {
1090 for (i=0; i<numwcs; i++)
1091 if (text->text.wc[text->gap_position + i] == '\n')
1092 new_line_count++;
1093 }
1094 else
1095 {
1096 for (i=0; i<numwcs; i++)
1097 if (text->text.ch[text->gap_position + i] == '\n')
1098 new_line_count++;
1099 }
1100 }
1101
1102 if (numwcs > 0)
1103 {
1104 insert_text_property (text, font, fore, back, numwcs);
1105
1106 text->gap_size -= numwcs;
1107 text->gap_position += numwcs;
1108
1109 if (text->point.index < text->first_line_start_index)
1110 text->first_line_start_index += numwcs;
1111 if (text->point.index < editable->selection_start_pos)
1112 editable->selection_start_pos += numwcs;
1113 if (text->point.index < editable->selection_end_pos)
1114 editable->selection_end_pos += numwcs;
1115 /* We'll reset the cursor later anyways if we aren't frozen */
1116 if (text->point.index < text->cursor_mark.index)
1117 text->cursor_mark.index += numwcs;
1118
1119 advance_mark_n (&text->point, numwcs);
1120
1121 if (!text->freeze_count && (text->line_start_cache != NULL))
1122 insert_expose (text, old_height, numwcs, new_line_count);
1123 }
1124
1125 if (frozen)
1126 gtk_stext_thaw (text);
1127 }
1128
1129 gint
1130 gtk_stext_backward_delete (GtkSText *text,
1131 guint nchars)
1132 {
1133 g_return_val_if_fail (text != NULL, 0);
1134 g_return_val_if_fail (GTK_IS_STEXT (text), 0);
1135
1136 if (nchars > text->point.index || nchars <= 0)
1137 return FALSE;
1138
1139 gtk_stext_set_point (text, text->point.index - nchars);
1140
1141 return gtk_stext_forward_delete (text, nchars);
1142 }
1143
1144 gint
1145 gtk_stext_forward_delete (GtkSText *text,
1146 guint nchars)
1147 {
1148 guint old_lines, old_height;
1149 GtkEditable *editable = GTK_EDITABLE (text);
1150 gboolean frozen = FALSE;
1151
1152 g_return_val_if_fail (text != NULL, 0);
1153 g_return_val_if_fail (GTK_IS_STEXT (text), 0);
1154
1155 if (text->point.index + nchars > TEXT_LENGTH (text) || nchars <= 0)
1156 return FALSE;
1157
1158 if (!text->freeze_count && nchars > FREEZE_LENGTH)
1159 {
1160 gtk_stext_freeze (text);
1161 frozen = TRUE;
1162 }
1163
1164 if (!text->freeze_count && text->line_start_cache != NULL)
1165 {
1166 /* We need to undraw the cursor here, since we may later
1167 * delete the cursor's property
1168 */
1169 undraw_cursor (text, FALSE);
1170 find_line_containing_point (text, text->point.index, TRUE);
1171 compute_lines_pixels (text, nchars, &old_lines, &old_height);
1172 }
1173
1174 /* FIXME, or resizing after deleting will be odd */
1175 if (text->point.index < text->first_line_start_index)
1176 {
1177 if (text->point.index + nchars >= text->first_line_start_index)
1178 {
1179 text->first_line_start_index = text->point.index;
1180 while ((text->first_line_start_index > 0) &&
1181 (GTK_STEXT_INDEX (text, text->first_line_start_index - 1)
1182 != LINE_DELIM))
1183 text->first_line_start_index -= 1;
1184
1185 }
1186 else
1187 text->first_line_start_index -= nchars;
1188 }
1189
1190 if (text->point.index < editable->selection_start_pos)
1191 editable->selection_start_pos -=
1192 MIN(nchars, editable->selection_start_pos - text->point.index);
1193 if (text->point.index < editable->selection_end_pos)
1194 editable->selection_end_pos -=
1195 MIN(nchars, editable->selection_end_pos - text->point.index);
1196 /* We'll reset the cursor later anyways if we aren't frozen */
1197 if (text->point.index < text->cursor_mark.index)
1198 move_mark_n (&text->cursor_mark,
1199 -MIN(nchars, text->cursor_mark.index - text->point.index));
1200
1201 move_gap (text, text->point.index);
1202
1203 text->gap_size += nchars;
1204
1205 delete_text_property (text, nchars);
1206
1207 if (!text->freeze_count && (text->line_start_cache != NULL))
1208 {
1209 delete_expose (text, nchars, old_lines, old_height);
1210 draw_cursor (text, FALSE);
1211 }
1212
1213 if (frozen)
1214 gtk_stext_thaw (text);
1215
1216 return TRUE;
1217 }
1218
1219 static void
1220 gtk_stext_set_position (GtkEditable *editable,
1221 gint position)
1222 {
1223 GtkSText *text = (GtkSText *) editable;
1224
1225 undraw_cursor (text, FALSE);
1226 text->cursor_mark = find_mark (text, position);
1227 find_cursor (text, TRUE);
1228 draw_cursor (text, FALSE);
1229 gtk_editable_select_region (editable, 0, 0);
1230 }
1231
1232 /* SYLPHEED - set_position used. Need to find out whether there's
1233 * a better way to handle this */
1234 static void gtk_stext_set_position_X (GtkEditable *editable,
1235 gint position)
1236 {
1237 GtkSText *text = (GtkSText *) editable;
1238
1239 undraw_cursor (text, FALSE);
1240 text->cursor_mark = find_mark (text, position);
1241 find_cursor (text, TRUE);
1242 draw_cursor (text, FALSE);
1243 }
1244
1245 static gchar *
1246 gtk_stext_get_chars (GtkEditable *editable,
1247 gint start_pos,
1248 gint end_pos)
1249 {
1250 GtkSText *text;
1251
1252 gchar *retval;
1253
1254 g_return_val_if_fail (editable != NULL, NULL);
1255 g_return_val_if_fail (GTK_IS_STEXT (editable), NULL);
1256 text = GTK_STEXT (editable);
1257
1258 if (end_pos < 0)
1259 end_pos = TEXT_LENGTH (text);
1260
1261 if ((start_pos < 0) ||
1262 (end_pos > TEXT_LENGTH (text)) ||
1263 (end_pos < start_pos))
1264 return NULL;
1265
1266 move_gap (text, TEXT_LENGTH (text));
1267 make_forward_space (text, 1);
1268
1269 if (text->use_wchar)
1270 {
1271 GdkWChar ch;
1272 ch = text->text.wc[end_pos];
1273 text->text.wc[end_pos] = 0;
1274 retval = gdk_wcstombs (text->text.wc + start_pos);
1275 text->text.wc[end_pos] = ch;
1276 }
1277 else
1278 {
1279 guchar ch;
1280 ch = text->text.ch[end_pos];
1281 text->text.ch[end_pos] = 0;
1282 retval = g_strdup (text->text.ch + start_pos);
1283 text->text.ch[end_pos] = ch;
1284 }
1285
1286 return retval;
1287 }
1288
1289
1290 static void
1291 gtk_stext_destroy (GtkObject *object)
1292 {
1293 GtkSText *text;
1294
1295 g_return_if_fail (object != NULL);
1296 g_return_if_fail (GTK_IS_STEXT (object));
1297
1298 text = (GtkSText*) object;
1299
1300 gtk_signal_disconnect_by_data (GTK_OBJECT (text->hadj), text);
1301 gtk_signal_disconnect_by_data (GTK_OBJECT (text->vadj), text);
1302
1303 if (text->timer)
1304 {
1305 gtk_timeout_remove (text->timer);
1306 text->timer = 0;
1307 }
1308
1309 /* SYLPHEED:
1310 * cursor timer
1311 */
1312 gtk_stext_disable_blink(text);
1313
1314 GTK_OBJECT_CLASS(parent_class)->destroy (object);
1315 }
1316
1317 static void
1318 gtk_stext_finalize (GtkObject *object)
1319 {
1320 GtkSText *text;
1321 GList *tmp_list;
1322
1323 g_return_if_fail (object != NULL);
1324 g_return_if_fail (GTK_IS_STEXT (object));
1325
1326 text = (GtkSText *)object;
1327
1328 gtk_object_unref (GTK_OBJECT (text->hadj));
1329 gtk_object_unref (GTK_OBJECT (text->vadj));
1330
1331 /* Clean up the internal structures */
1332 if (text->use_wchar)
1333 g_free (text->text.wc);
1334 else
1335 g_free (text->text.ch);
1336
1337 tmp_list = text->text_properties;
1338 while (tmp_list)
1339 {
1340 destroy_text_property (tmp_list->data);
1341 tmp_list = tmp_list->next;
1342 }
1343
1344 if (text->current_font)
1345 text_font_unref (text->current_font);
1346
1347 g_list_free (text->text_properties);
1348
1349 if (text->use_wchar)
1350 {
1351 if (text->scratch_buffer.wc)
1352 g_free (text->scratch_buffer.wc);
1353 }
1354 else
1355 {
1356 if (text->scratch_buffer.ch)
1357 g_free (text->scratch_buffer.ch);
1358 }
1359
1360 g_list_free (text->tab_stops);
1361
1362 GTK_OBJECT_CLASS(parent_class)->finalize (object);
1363 }
1364
1365 static void
1366 gtk_stext_realize (GtkWidget *widget)
1367 {
1368 GtkSText *text;
1369 GtkEditable *editable;
1370 GdkWindowAttr attributes;
1371 gint attributes_mask;
1372
1373 g_return_if_fail (widget != NULL);
1374 g_return_if_fail (GTK_IS_STEXT (widget));
1375
1376 text = GTK_STEXT (widget);
1377 editable = GTK_EDITABLE (widget);
1378 GTK_WIDGET_SET_FLAGS (text, GTK_REALIZED);
1379
1380 attributes.window_type = GDK_WINDOW_CHILD;
1381 attributes.x = widget->allocation.x;
1382 attributes.y = widget->allocation.y;
1383 attributes.width = widget->allocation.width;
1384 attributes.height = widget->allocation.height;
1385 attributes.wclass = GDK_INPUT_OUTPUT;
1386 attributes.visual = gtk_widget_get_visual (widget);
1387 attributes.colormap = gtk_widget_get_colormap (widget);
1388 attributes.event_mask = gtk_widget_get_events (widget);
1389 attributes.event_mask |= (GDK_EXPOSURE_MASK |
1390 GDK_BUTTON_PRESS_MASK |
1391 GDK_BUTTON_RELEASE_MASK |
1392 GDK_BUTTON_MOTION_MASK |
1393 GDK_ENTER_NOTIFY_MASK |
1394 GDK_LEAVE_NOTIFY_MASK |
1395 GDK_KEY_PRESS_MASK);
1396 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
1397
1398 widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
1399 gdk_window_set_user_data (widget->window, text);
1400
1401 attributes.x = (widget->style->klass->xthickness + TEXT_BORDER_ROOM);
1402 attributes.y = (widget->style->klass->ythickness + TEXT_BORDER_ROOM);
1403 attributes.width = MAX (1, (gint)widget->allocation.width - (gint)attributes.x * 2);
1404 attributes.height = MAX (1, (gint)widget->allocation.height - (gint)attributes.y * 2);
1405
1406 attributes.cursor = gdk_cursor_new (GDK_XTERM);
1407 attributes_mask |= GDK_WA_CURSOR;
1408
1409 text->text_area = gdk_window_new (widget->window, &attributes, attributes_mask);
1410 gdk_window_set_user_data (text->text_area, text);
1411
1412 gdk_cursor_destroy (attributes.cursor); /* The X server will keep it around as long as necessary */
1413
1414 widget->style = gtk_style_attach (widget->style, widget->window);
1415
1416 /* Can't call gtk_style_set_background here because it's handled specially */
1417 gdk_window_set_background (widget->window, &widget->style->base[GTK_WIDGET_STATE (widget)]);
1418 gdk_window_set_background (text->text_area, &widget->style->base[GTK_WIDGET_STATE (widget)]);
1419
1420 if (widget->style->bg_pixmap[GTK_STATE_NORMAL])
1421 text->bg_gc = create_bg_gc (text);
1422
1423 text->line_wrap_bitmap = gdk_bitmap_create_from_data (text->text_area,
1424 (gchar*) line_wrap_bits,
1425 line_wrap_width,
1426 line_wrap_height);
1427
1428 text->line_arrow_bitmap = gdk_bitmap_create_from_data (text->text_area,
1429 (gchar*) line_arrow_bits,
1430 line_arrow_width,
1431 line_arrow_height);
1432
1433 text->gc = gdk_gc_new (text->text_area);
1434 gdk_gc_set_exposures (text->gc, TRUE);
1435 gdk_gc_set_foreground (text->gc, &widget->style->text[GTK_STATE_NORMAL]);
1436
1437 #ifdef USE_GTKGDK_XIM
1438 if (gdk_im_ready () && (editable->ic_attr = gdk_ic_attr_new ()) != NULL)
1439 {
1440 gint width, height;
1441 GdkColormap *colormap;
1442 GdkEventMask mask;
1443 GdkICAttr *attr = editable->ic_attr;
1444 GdkICAttributesType attrmask = GDK_IC_ALL_REQ;
1445 GdkIMStyle style;
1446 GdkIMStyle supported_style = GDK_IM_PREEDIT_NONE |
1447 GDK_IM_PREEDIT_NOTHING |
1448 GDK_IM_PREEDIT_POSITION |
1449 GDK_IM_STATUS_NONE |
1450 GDK_IM_STATUS_NOTHING;
1451
1452 if (widget->style && widget->style->font->type != GDK_FONT_FONTSET)
1453 supported_style &= ~GDK_IM_PREEDIT_POSITION;
1454
1455 attr->style = style = gdk_im_decide_style (supported_style);
1456 attr->client_window = text->text_area;
1457
1458 if ((colormap = gtk_widget_get_colormap (widget)) !=
1459 gtk_widget_get_default_colormap ())
1460 {
1461 attrmask |= GDK_IC_PREEDIT_COLORMAP;
1462 attr->preedit_colormap = colormap;
1463 }
1464
1465 switch (style & GDK_IM_PREEDIT_MASK)
1466 {
1467 case GDK_IM_PREEDIT_POSITION:
1468 if (widget->style && widget->style->font->type != GDK_FONT_FONTSET)
1469 {
1470 g_warning ("over-the-spot style requires fontset");
1471 break;
1472 }
1473
1474 attrmask |= GDK_IC_PREEDIT_POSITION_REQ;
1475 gdk_window_get_size (text->text_area, &width, &height);
1476 attr->spot_location.x = 0;
1477 attr->spot_location.y = height;
1478 attr->preedit_area.x = 0;
1479 attr->preedit_area.y = 0;
1480 attr->preedit_area.width = width;
1481 attr->preedit_area.height = height;
1482 attr->preedit_fontset = widget->style->font;
1483
1484 break;
1485 }
1486 editable->ic = gdk_ic_new (attr, attrmask);
1487
1488 if (editable->ic == NULL)
1489 g_warning ("Can't create input context.");
1490 else
1491 {
1492 mask = gdk_window_get_events (text->text_area);
1493 mask |= gdk_ic_get_events (editable->ic);
1494 gdk_window_set_events (text->text_area, mask);
1495
1496 if (GTK_WIDGET_HAS_FOCUS (widget))
1497 gdk_im_begin (editable->ic, text->text_area);
1498 }
1499 }
1500 #endif
1501
1502 realize_properties (text);
1503 gdk_window_show (text->text_area);
1504 init_properties (text);
1505
1506 if (editable->selection_start_pos != editable->selection_end_pos)
1507 gtk_editable_claim_selection (editable, TRUE, GDK_CURRENT_TIME);
1508
1509 recompute_geometry (text);
1510 }
1511
1512 static void
1513 gtk_stext_style_set (GtkWidget *widget,
1514 GtkStyle *previous_style)
1515 {
1516 GtkSText *text = GTK_STEXT (widget);
1517
1518 if (GTK_WIDGET_REALIZED (widget))
1519 {
1520 gdk_window_set_background (widget->window, &widget->style->base[GTK_WIDGET_STATE (widget)]);
1521 gdk_window_set_background (text->text_area, &widget->style->base[GTK_WIDGET_STATE (widget)]);
1522
1523 if (text->bg_gc)
1524 {
1525 gdk_gc_destroy (text->bg_gc);
1526 text->bg_gc = NULL;
1527 }
1528
1529 if (widget->style->bg_pixmap[GTK_STATE_NORMAL])
1530 text->bg_gc = create_bg_gc (text);
1531
1532 recompute_geometry (text);
1533 }
1534
1535 if (text->current_font)
1536 text_font_unref (text->current_font);
1537 text->current_font = get_text_font (widget->style->font);
1538 }
1539
1540 static void
1541 gtk_stext_state_changed (GtkWidget *widget,
1542 GtkStateType previous_state)
1543 {
1544 GtkSText *text = GTK_STEXT (widget);
1545
1546 if (GTK_WIDGET_REALIZED (widget))
1547 {
1548 gdk_window_set_background (widget->window, &widget->style->base[GTK_WIDGET_STATE (widget)]);
1549 gdk_window_set_background (text->text_area, &widget->style->base[GTK_WIDGET_STATE (widget)]);
1550 }
1551 }
1552
1553 static void
1554 gtk_stext_unrealize (GtkWidget *widget)
1555 {
1556 GtkSText *text;
1557
1558 g_return_if_fail (widget != NULL);
1559 g_return_if_fail (GTK_IS_STEXT (widget));
1560
1561 text = GTK_STEXT (widget);
1562
1563 #ifdef USE_GTKGDK_XIM
1564 if (GTK_EDITABLE (widget)->ic)
1565 {
1566 gdk_ic_destroy (GTK_EDITABLE (widget)->ic);
1567 GTK_EDITABLE (widget)->ic = NULL;
1568 }
1569 if (GTK_EDITABLE (widget)->ic_attr)
1570 {
1571 gdk_ic_attr_destroy (GTK_EDITABLE (widget)->ic_attr);
1572 GTK_EDITABLE (widget)->ic_attr = NULL;
1573 }
1574 #endif
1575
1576 gdk_window_set_user_data (text->text_area, NULL);
1577 gdk_window_destroy (text->text_area);
1578 text->text_area = NULL;
1579
1580 gdk_gc_destroy (text->gc);
1581 text->gc = NULL;
1582
1583 if (text->bg_gc)
1584 {
1585 gdk_gc_destroy (text->bg_gc);
1586 text->bg_gc = NULL;
1587 }
1588
1589 gdk_pixmap_unref (text->line_wrap_bitmap);
1590 gdk_pixmap_unref (text->line_arrow_bitmap);
1591
1592 unrealize_properties (text);
1593
1594 free_cache (text);
1595
1596 if (GTK_WIDGET_CLASS (parent_class)->unrealize)
1597 (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
1598 }
1599
1600 static void
1601 clear_focus_area (GtkSText *text, gint area_x, gint area_y, gint area_width, gint area_height)
1602 {
1603 GtkWidget *widget = GTK_WIDGET (text);
1604 GdkGC *gc;
1605
1606 gint ythick = TEXT_BORDER_ROOM + widget->style->klass->ythickness;
1607 gint xthick = TEXT_BORDER_ROOM + widget->style->klass->xthickness;
1608
1609 gint width, height;
1610
1611 if (area_width == 0 || area_height == 0)
1612 return;
1613
1614 if (widget->style->bg_pixmap[GTK_STATE_NORMAL])
1615 {
1616 gdk_window_get_size (widget->style->bg_pixmap[GTK_STATE_NORMAL], &width, &height);
1617
1618 gdk_gc_set_ts_origin (text->bg_gc,
1619 (- (gint)text->first_onscreen_hor_pixel + xthick) % width,
1620 (- (gint)text->first_onscreen_ver_pixel + ythick) % height);
1621
1622 gc = text->bg_gc;
1623 }
1624 else
1625 gc = widget->style->bg_gc[widget->state];
1626
1627
1628 gdk_draw_rectangle (GTK_WIDGET (text)->window, gc, TRUE,
1629 area_x, area_y, area_width, area_height);
1630 }
1631
1632 static void
1633 gtk_stext_draw_focus (GtkWidget *widget)
1634 {
1635 GtkSText *text;
1636 gint width, height;
1637 gint x, y;
1638
1639 g_return_if_fail (widget != NULL);
1640 g_return_if_fail (GTK_IS_STEXT (widget));
1641
1642 text = GTK_STEXT (widget);
1643
1644 if (GTK_WIDGET_DRAWABLE (widget))
1645 {
1646 gint ythick = widget->style->klass->ythickness;
1647 gint xthick = widget->style->klass->xthickness;
1648 gint xextra = TEXT_BORDER_ROOM;
1649 gint yextra = TEXT_BORDER_ROOM;
1650
1651 TDEBUG (("in gtk_stext_draw_focus\n"));
1652
1653 x = 0;
1654 y = 0;
1655 width = widget->allocation.width;
1656 height = widget->allocation.height;
1657
1658 if (GTK_WIDGET_HAS_FOCUS (widget))
1659 {
1660 x += 1;
1661 y += 1;
1662 width -= 2;
1663 height -= 2;
1664 xextra -= 1;
1665 yextra -= 1;
1666
1667 gtk_paint_focus (widget->style, widget->window,
1668 NULL, widget, "text",
1669 0, 0,
1670 widget->allocation.width - 1,
1671 widget->allocation.height - 1);
1672 }
1673
1674 gtk_paint_shadow (widget->style, widget->window,
1675 GTK_STATE_NORMAL, GTK_SHADOW_IN,
1676 NULL, widget, "text",
1677 x, y, width, height);
1678
1679 x += xthick;
1680 y += ythick;
1681 width -= 2 * xthick;
1682 height -= 2 * ythick;
1683
1684 /* top rect */
1685 clear_focus_area (text, x, y, width, yextra);
1686 /* left rect */
1687 clear_focus_area (text, x, y + yextra,
1688 xextra, y + height - 2 * yextra);
1689 /* right rect */
1690 clear_focus_area (text, x + width - xextra, y + yextra,
1691 xextra, height - 2 * ythick);
1692 /* bottom rect */
1693 clear_focus_area (text, x, x + height - yextra, width, yextra);
1694 }
1695 else
1696 {
1697 TDEBUG (("in gtk_stext_draw_focus (undrawable !!!)\n"));
1698 }
1699 }
1700
1701 static void
1702 gtk_stext_size_request (GtkWidget *widget,
1703 GtkRequisition *requisition)
1704 {
1705 gint xthickness;
1706 gint ythickness;
1707 gint char_height;
1708 gint char_width;
1709
1710 g_return_if_fail (widget != NULL);
1711 g_return_if_fail (GTK_IS_STEXT (widget));
1712 g_return_if_fail (requisition != NULL);
1713
1714 xthickness = widget->style->klass->xthickness + TEXT_BORDER_ROOM;
1715 ythickness = widget->style->klass->ythickness + TEXT_BORDER_ROOM;
1716
1717 char_height = MIN_TEXT_HEIGHT_LINES * (widget->style->font->ascent +
1718 widget->style->font->descent);
1719
1720 char_width = MIN_TEXT_WIDTH_LINES * (gdk_text_width (widget->style->font,
1721 "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
1722 26)
1723 / 26);
1724
1725 requisition->width = char_width + xthickness * 2;
1726 requisition->height = char_height + ythickness * 2;
1727 }
1728
1729 static void
1730 gtk_stext_size_allocate (GtkWidget *widget,
1731 GtkAllocation *allocation)
1732 {
1733 GtkSText *text;
1734 GtkEditable *editable;
1735
1736 g_return_if_fail (widget != NULL);
1737 g_return_if_fail (GTK_IS_STEXT (widget));
1738 g_return_if_fail (allocation != NULL);
1739
1740 text = GTK_STEXT (widget);
1741 editable = GTK_EDITABLE (widget);
1742
1743 widget->allocation = *allocation;
1744 if (GTK_WIDGET_REALIZED (widget))
1745 {
1746 gdk_window_move_resize (widget->window,
1747 allocation->x, allocation->y,
1748 allocation->width, allocation->height);
1749
1750 gdk_window_move_resize (text->text_area,
1751 widget->style->klass->xthickness + TEXT_BORDER_ROOM,
1752 widget->style->klass->ythickness + TEXT_BORDER_ROOM,
1753 MAX (1, (gint)widget->allocation.width - (gint)(widget->style->klass->xthickness +
1754 (gint)TEXT_BORDER_ROOM) * 2),
1755 MAX (1, (gint)widget->allocation.height - (gint)(widget->style->klass->ythickness +
1756 (gint)TEXT_BORDER_ROOM) * 2));
1757
1758 #ifdef USE_GTKGDK_XIM
1759 if (editable->ic && (gdk_ic_get_style (editable->ic) & GDK_IM_PREEDIT_POSITION))
1760 {
1761 gint width, height;
1762
1763 gdk_window_get_size (text->text_area, &width, &height);
1764 editable->ic_attr->preedit_area.width = width;
1765 editable->ic_attr->preedit_area.height = height;
1766
1767 gdk_ic_set_attr (editable->ic,
1768 editable->ic_attr, GDK_IC_PREEDIT_AREA);
1769 }
1770 #endif
1771
1772 recompute_geometry (text);
1773 }
1774 }
1775
1776 static void
1777 gtk_stext_draw (GtkWidget *widget,
1778 GdkRectangle *area)
1779 {
1780 g_return_if_fail (widget != NULL);
1781 g_return_if_fail (GTK_IS_STEXT (widget));
1782 g_return_if_fail (area != NULL);
1783
1784 if (GTK_WIDGET_DRAWABLE (widget))
1785 {
1786 expose_text (GTK_STEXT (widget), area, TRUE);
1787 gtk_widget_draw_focus (widget);
1788 }
1789 }
1790
1791 static gint
1792 gtk_stext_expose (GtkWidget *widget,
1793 GdkEventExpose *event)
1794 {
1795 g_return_val_if_fail (widget != NULL, FALSE);
1796 g_return_val_if_fail (GTK_IS_STEXT (widget), FALSE);
1797 g_return_val_if_fail (event != NULL, FALSE);
1798
1799 if (event->window == GTK_STEXT (widget)->text_area)
1800 {
1801 TDEBUG (("in gtk_stext_expose (expose)\n"));
1802 expose_text (GTK_STEXT (widget), &event->area, TRUE);
1803 }
1804 else if (event->count == 0)
1805 {
1806 TDEBUG (("in gtk_stext_expose (focus)\n"));
1807 gtk_widget_draw_focus (widget);
1808 }
1809
1810 return FALSE;
1811 }
1812
1813 static gint
1814 gtk_stext_scroll_timeout (gpointer data)
1815 {
1816 GtkSText *text;
1817 GdkEventMotion event;
1818 gint x, y;
1819 GdkModifierType mask;
1820
1821 GDK_THREADS_ENTER ();
1822
1823 text = GTK_STEXT (data);
1824
1825 text->timer = 0;
1826 gdk_window_get_pointer (text->text_area, &x, &y, &mask);
1827
1828 if (mask & (GDK_BUTTON1_MASK | GDK_BUTTON3_MASK))
1829 {
1830 event.is_hint = 0;
1831 event.x = x;
1832 event.y = y;
1833 event.state = mask;
1834
1835 gtk_stext_motion_notify (GTK_WIDGET (text), &event);
1836 }
1837
1838 GDK_THREADS_LEAVE ();
1839
1840 return FALSE;
1841 }
1842
1843 static gint
1844 gtk_stext_button_press (GtkWidget *widget,
1845 GdkEventButton *event)
1846 {
1847 GtkSText *text;
1848 GtkEditable *editable;
1849 static GdkAtom ctext_atom = GDK_NONE;
1850
1851 g_return_val_if_fail (widget != NULL, FALSE);
1852 g_return_val_if_fail (GTK_IS_STEXT (widget), FALSE);
1853 g_return_val_if_fail (event != NULL, FALSE);
1854
1855 if (ctext_atom == GDK_NONE)
1856 ctext_atom = gdk_atom_intern ("COMPOUND_TEXT", FALSE);
1857
1858 text = GTK_STEXT (widget);
1859 editable = GTK_EDITABLE (widget);
1860
1861 if (text->button && (event->button != text->button))
1862 return FALSE;
1863
1864 text->button = event->button;
1865
1866 if (!GTK_WIDGET_HAS_FOCUS (widget))
1867 gtk_widget_grab_focus (widget);
1868
1869 if (event->button == 1)
1870 {
1871 switch (event->type)
1872 {
1873 case GDK_BUTTON_PRESS:
1874 gtk_grab_add (widget);
1875
1876 undraw_cursor (text, FALSE);
1877 find_mouse_cursor (text, (gint)event->x, (gint)event->y);
1878 draw_cursor (text, FALSE);
1879
1880 /* Set it now, so we display things right. We'll unset it
1881 * later if things don't work out */
1882 editable->has_selection = TRUE;
1883 gtk_stext_set_selection (GTK_EDITABLE(text),
1884 text->cursor_mark.index,
1885 text->cursor_mark.index);
1886
1887 break;
1888
1889 case GDK_2BUTTON_PRESS:
1890 gtk_stext_select_word (text, event->time);
1891 break;
1892
1893 case GDK_3BUTTON_PRESS:
1894 gtk_stext_select_line (text, event->time);
1895 break;
1896
1897 default:
1898 break;
1899 }
1900 }
1901 else if (event->type == GDK_BUTTON_PRESS)
1902 {
1903 if ((event->button == 2) && editable->editable)
1904 {
1905 if (editable->selection_start_pos == editable->selection_end_pos ||
1906 editable->has_selection)
1907 {
1908 undraw_cursor (text, FALSE);
1909 find_mouse_cursor (text, (gint)event->x, (gint)event->y);
1910 draw_cursor (text, FALSE);
1911
1912 }
1913
1914 gtk_selection_convert (widget, GDK_SELECTION_PRIMARY,
1915 ctext_atom, event->time);
1916 }
1917 else
1918 {
1919 gtk_grab_add (widget);
1920
1921 undraw_cursor (text, FALSE);
1922 find_mouse_cursor (text, event->x, event->y);
1923 draw_cursor (text, FALSE);
1924
1925 gtk_stext_set_selection (GTK_EDITABLE(text),
1926 text->cursor_mark.index,
1927 text->cursor_mark.index);
1928
1929 editable->has_selection = FALSE;
1930 if (gdk_selection_owner_get (GDK_SELECTION_PRIMARY) == widget->window)
1931 gtk_selection_owner_set (NULL, GDK_SELECTION_PRIMARY, event->time);
1932 }
1933 }
1934
1935 return FALSE;
1936 }
1937
1938 static gint
1939 gtk_stext_button_release (GtkWidget *widget,
1940 GdkEventButton *event)
1941 {
1942 GtkSText *text;
1943 GtkEditable *editable;
1944 g_return_val_if_fail (widget != NULL, FALSE);
1945 g_return_val_if_fail (GTK_IS_STEXT (widget), FALSE);
1946 g_return_val_if_fail (event != NULL, FALSE);
1947
1948 text = GTK_STEXT (widget);
1949
1950 gtk_grab_remove (widget);
1951
1952 if (text->button != event->button)
1953 return FALSE;
1954
1955 text->button = 0;
1956
1957 if (text->timer)
1958 {
1959 gtk_timeout_remove (text->timer);
1960 text->timer = 0;
1961 }
1962
1963 if (event->button == 1)
1964 {
1965 text = GTK_STEXT (widget);
1966 editable = GTK_EDITABLE (widget);
1967
1968 gtk_grab_remove (widget);
1969
1970 editable->has_selection = FALSE;
1971 if (editable->selection_start_pos != editable->selection_end_pos)
1972 {
1973 if (gtk_selection_owner_set (widget,
1974 GDK_SELECTION_PRIMARY,
1975 event->time))
1976 editable->has_selection = TRUE;
1977 else
1978 gtk_stext_update_text (editable, editable->selection_start_pos,
1979 editable->selection_end_pos);
1980 }
1981 else
1982 {
1983 if (gdk_selection_owner_get (GDK_SELECTION_PRIMARY) == widget->window)
1984 gtk_selection_owner_set (NULL, GDK_SELECTION_PRIMARY, event->time);
1985 }
1986 }
1987 else if (event->button == 3)
1988 {
1989 gtk_grab_remove (widget);
1990 }
1991
1992 undraw_cursor (text, FALSE);
1993 find_cursor (text, TRUE);
1994 draw_cursor (text, FALSE);
1995
1996 return FALSE;
1997 }
1998
1999 static gint
2000 gtk_stext_motion_notify (GtkWidget *widget,
2001 GdkEventMotion *event)
2002 {
2003 GtkSText *text;
2004 gint x, y;
2005 gint height;
2006 GdkModifierType mask;
2007
2008 g_return_val_if_fail (widget != NULL, FALSE);
2009 g_return_val_if_fail (GTK_IS_STEXT (widget), FALSE);
2010 g_return_val_if_fail (event != NULL, FALSE);
2011
2012 text = GTK_STEXT (widget);
2013
2014 x = event->x;
2015 y = event->y;
2016 mask = event->state;
2017 if (event->is_hint || (text->text_area != event->window))
2018 {
2019 gdk_window_get_pointer (text->text_area, &x, &y, &mask);
2020 }
2021
2022 if ((text->button == 0) ||
2023 !(mask & (GDK_BUTTON1_MASK | GDK_BUTTON3_MASK)))
2024 return FALSE;
2025
2026 gdk_window_get_size (text->text_area, NULL, &height);
2027
2028 if ((y < 0) || (y > height))
2029 {
2030 if (text->timer == 0)
2031 {
2032 text->timer = gtk_timeout_add (SCROLL_TIME,
2033 gtk_stext_scroll_timeout,
2034 text);
2035
2036 if (y < 0)
2037 scroll_int (text, y/2);
2038 else
2039 scroll_int (text, (y - height)/2);
2040 }
2041 else
2042 return FALSE;
2043 }
2044
2045 undraw_cursor (GTK_STEXT (widget), FALSE);
2046 find_mouse_cursor (GTK_STEXT (widget), x, y);
2047 draw_cursor (GTK_STEXT (widget), FALSE);
2048
2049 gtk_stext_set_selection (GTK_EDITABLE(text),
2050 GTK_EDITABLE(text)->selection_start_pos,
2051 text->cursor_mark.index);
2052
2053 return FALSE;
2054 }
2055
2056 static void
2057 gtk_stext_insert_text (GtkEditable *editable,
2058 const gchar *new_text,
2059 gint new_text_length,
2060 gint *position)
2061 {
2062 GtkSText *text = GTK_STEXT (editable);
2063 GdkFont *font;
2064 GdkColor *fore, *back;
2065
2066 TextProperty *property;
2067
2068 gtk_stext_set_point (text, *position);
2069
2070 property = MARK_CURRENT_PROPERTY (&text->point);
2071 font = property->flags & PROPERTY_FONT ? property->font->gdk_font : NULL;
2072 fore = property->flags & PROPERTY_FOREGROUND ? &property->fore_color : NULL;
2073 back = property->flags & PROPERTY_BACKGROUND ? &property->back_color : NULL;
2074
2075 gtk_stext_insert (text, font, fore, back, new_text, new_text_length);
2076
2077 *position = text->point.index;
2078 }
2079
2080 static void
2081 gtk_stext_delete_text (GtkEditable *editable,
2082 gint start_pos,
2083 gint end_pos)
2084 {
2085 GtkSText *text;
2086
2087 g_return_if_fail (start_pos >= 0);
2088
2089 text = GTK_STEXT (editable);
2090
2091 gtk_stext_set_point (text, start_pos);
2092 if (end_pos < 0)
2093 end_pos = TEXT_LENGTH (text);
2094
2095 if (end_pos > start_pos)
2096 gtk_stext_forward_delete (text, end_pos - start_pos);
2097 }
2098
2099 static gint
2100 gtk_stext_key_press (GtkWidget *widget,
2101 GdkEventKey *event)
2102 {
2103 GtkSText *text;
2104 GtkEditable *editable;
2105 gchar key;
2106 gint return_val;
2107 gint position;
2108
2109 g_return_val_if_fail (widget != NULL, FALSE);
2110 g_return_val_if_fail (GTK_IS_STEXT (widget), FALSE);
2111 g_return_val_if_fail (event != NULL, FALSE);
2112
2113 return_val = FALSE;
2114
2115 text = GTK_STEXT (widget);
2116 editable = GTK_EDITABLE (widget);
2117
2118 key = event->keyval;
2119 return_val = TRUE;
2120
2121 if ((GTK_EDITABLE(text)->editable == FALSE))
2122 {
2123 switch (event->keyval)
2124 {
2125 case GDK_Home:
2126 if (event->state & GDK_CONTROL_MASK)
2127 scroll_int (text, -text->vadj->value);
2128 else
2129 return_val = FALSE;
2130 break;
2131 case GDK_End:
2132 if (event->state & GDK_CONTROL_MASK)
2133 scroll_int (text, +text->vadj->upper);
2134 else
2135 return_val = FALSE;
2136 break;
2137 case GDK_Page_Up: scroll_int (text, -text->vadj->page_increment); break;
2138 case GDK_Page_Down: scroll_int (text, +text->vadj->page_increment); break;
2139 case GDK_Up:
2140 scroll_int (text, -KEY_SCROLL_PIXELS);
2141 break;
2142 case GDK_Down: scroll_int (text, +KEY_SCROLL_PIXELS); break;
2143 case GDK_Return:
2144 if (event->state & GDK_CONTROL_MASK)
2145 gtk_signal_emit_by_name (GTK_OBJECT (text), "activate");
2146 else
2147 return_val = FALSE;
2148 break;
2149 default:
2150 return_val = FALSE;
2151 break;
2152 }
2153 }
2154 else
2155 {
2156 gint extend_selection;
2157 gint extend_start;
2158 guint initial_pos = editable->current_pos;
2159
2160 text->point = find_mark (text, text->cursor_mark.index);
2161
2162 extend_selection = event->state & GDK_SHIFT_MASK;
2163 extend_start = FALSE;
2164
2165 if (extend_selection)
2166 {
2167 editable->has_selection = TRUE;
2168
2169 if (editable->selection_start_pos == editable->selection_end_pos)
2170 {
2171 editable->selection_start_pos = text->point.index;
2172 editable->selection_end_pos = text->point.index;
2173 }
2174
2175 extend_start = (text->point.index == editable->selection_start_pos);
2176 gtk_stext_disable_blink(text);
2177 }
2178
2179 /* SYLPHEED:
2180 * cursor
2181 */
2182 if (!extend_selection)
2183 gtk_stext_enable_blink(text);
2184
2185 if (event->keyval != GDK_Up && event->keyval != GDK_Down) {
2186 reset_persist_col_pos(text);
2187 }
2188
2189 switch (event->keyval)
2190 {
2191 case GDK_Home:
2192 if (event->state & GDK_CONTROL_MASK) {
2193 if (text->wrap_rmargin == 0) {
2194 /* SYLPHEED: old behaviour */
2195 move_cursor_buffer_ver (text, -1);
2196 }
2197 else {
2198 /* SYLPHEED: contrived, but "trusty" */
2199 move_cursor_buffer_ver(text, -1);
2200 move_cursor_to_display_row_start(text);
2201 }
2202 }
2203 else {
2204 if (text->wrap_rmargin > 0) {
2205 /* SYLPHEED: line start */
2206 move_cursor_to_display_row_start(text);
2207 }
2208 else {
2209 gtk_stext_move_beginning_of_line (text);
2210 }
2211 }
2212 break;
2213 case GDK_End:
2214 if (event->state & GDK_CONTROL_MASK) {
2215 /* SYLPHEED: a little bit contrived... */
2216 if (text->wrap_rmargin == 0) {
2217 /* old behaviour */
2218 move_cursor_buffer_ver (text, +1);
2219 }
2220 else {
2221 move_cursor_buffer_ver(text, +1);
2222 move_cursor_to_display_row_end(text);
2223 }
2224 }
2225 else {
2226 if (text->wrap_rmargin > 0) {
2227 /* SYLPHEED: line end */
2228 move_cursor_to_display_row_end(text);
2229 }
2230 else {
2231 gtk_stext_move_end_of_line(text);
2232 }
2233 }
2234 break;
2235 case GDK_Page_Up:
2236 move_cursor_page_ver (text, -1);
2237 break;
2238 case GDK_Page_Down: move_cursor_page_ver (text, +1); break;
2239 /* CUA has Ctrl-Up/Ctrl-Down as paragraph up down */
2240 case GDK_Up:
2241 if (text->wrap_rmargin > 0) {
2242 /* SYLPHEED
2243 */
2244 move_cursor_to_display_row_up(text);
2245 }
2246 else {
2247 move_cursor_ver (text, -1);
2248 }
2249 break;
2250 case GDK_Down:
2251 move_cursor_to_display_row_down(text);
2252 /* move_cursor_ver (text, +1); */
2253 break;
2254 case GDK_Left:
2255 if (event->state & GDK_CONTROL_MASK)
2256 gtk_stext_move_backward_word (text);
2257 else
2258 move_cursor_hor (text, -1);
2259 break;
2260 case GDK_Right:
2261 if (event->state & GDK_CONTROL_MASK)
2262 gtk_stext_move_forward_word (text);
2263 else
2264 move_cursor_hor (text, +1);
2265 break;
2266
2267 case GDK_BackSpace:
2268 if (event->state & GDK_CONTROL_MASK)
2269 gtk_stext_delete_backward_word (text);
2270 else
2271 gtk_stext_delete_backward_character (text);
2272 break;
2273 case GDK_Clear:
2274 gtk_stext_delete_line (text);
2275 break;
2276 case GDK_Insert:
2277 if (event->state & GDK_SHIFT_MASK)
2278 {
2279 extend_selection = FALSE;
2280 gtk_editable_paste_clipboard (editable);
2281 }
2282 else if (event->state & GDK_CONTROL_MASK)
2283 {
2284 gtk_editable_copy_clipboard (editable);
2285 }
2286 else
2287 {
2288 /* gtk_toggle_insert(text) -- IMPLEMENT */
2289 }
2290 break;
2291 case GDK_Delete:
2292 {
2293 if (event->state & GDK_CONTROL_MASK) {
2294 gtk_stext_delete_forward_word (text);
2295 }
2296 else if (event->state & GDK_SHIFT_MASK)
2297 {
2298 extend_selection = FALSE;
2299 gtk_editable_cut_clipboard (editable);
2300 }
2301 else {
2302 gtk_stext_delete_forward_character (text);
2303 }
2304 }
2305 break;
2306 case GDK_Tab:
2307 position = text->point.index;
2308 gtk_editable_insert_text (editable, "\t", 1, &position);
2309 break;
2310 case GDK_Return:
2311 if (event->state & GDK_CONTROL_MASK)
2312 gtk_signal_emit_by_name (GTK_OBJECT (text), "activate");
2313 else
2314 {
2315 position = text->point.index;
2316 gtk_editable_insert_text (editable, "\n", 1, &position);
2317 }
2318 break;
2319 case GDK_Escape:
2320 /* Don't insert literally */
2321 return_val = FALSE;
2322 break;
2323
2324 default:
2325 return_val = FALSE;
2326
2327 if (event->state & GDK_CONTROL_MASK)
2328 {
2329 if ((key >= 'A') && (key <= 'Z'))
2330 key -= 'A' - 'a';
2331
2332 if ((key >= 'a') && (key <= 'z') && control_keys[(int) (key - 'a')])
2333 {
2334 (* control_keys[(int) (key - 'a')]) (editable, event->time);
2335 return_val = TRUE;
2336 }
2337
2338 break;
2339 }
2340 else if (event->state & GDK_MOD1_MASK)
2341 {
2342 if ((key >= 'A') && (key <= 'Z'))
2343 key -= 'A' - 'a';
2344
2345 if ((key >= 'a') && (key <= 'z') && alt_keys[(int) (key - 'a')])
2346 {
2347 (* alt_keys[(int) (key - 'a')]) (editable, event->time);
2348 return_val = TRUE;
2349 }
2350
2351 break;
2352 }
2353 else if (event->length > 0)
2354 {
2355 extend_selection = FALSE;
2356
2357 gtk_editable_delete_selection (editable);
2358 position = text->point.index;
2359 gtk_editable_insert_text (editable, event->string, event->length, &position);
2360
2361 return_val = TRUE;
2362 }
2363 else
2364 return_val = FALSE;
2365 }
2366
2367 if (return_val && (editable->current_pos != initial_pos))
2368 {
2369 if (extend_selection)
2370 {
2371 if (editable->current_pos < editable->selection_start_pos)
2372 gtk_stext_set_selection (editable, editable->current_pos,
2373 editable->selection_end_pos);
2374 else if (editable->current_pos > editable->selection_end_pos)
2375 gtk_stext_set_selection (editable, editable->selection_start_pos,
2376 editable->current_pos);
2377 else
2378 {
2379 if (extend_start)
2380 gtk_stext_set_selection (editable, editable->current_pos,
2381 editable->selection_end_pos);
2382 else
2383 gtk_stext_set_selection (editable, editable->selection_start_pos,
2384 editable->current_pos);
2385 }
2386 }
2387 else
2388 gtk_stext_set_selection (editable, 0, 0);
2389
2390 gtk_editable_claim_selection (editable,
2391 editable->selection_start_pos != editable->selection_end_pos,
2392 event->time);
2393 }
2394 }
2395
2396 return return_val;
2397 }
2398
2399 static gint
2400 gtk_stext_focus_in (GtkWidget *widget,
2401 GdkEventFocus *event)
2402 {
2403 g_return_val_if_fail (widget != NULL, FALSE);
2404 g_return_val_if_fail (GTK_IS_STEXT (widget), FALSE);
2405 g_return_val_if_fail (event != NULL, FALSE);
2406
2407 TDEBUG (("in gtk_stext_focus_in\n"));
2408
2409 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
2410 gtk_widget_draw_focus (widget);
2411
2412 #ifdef USE_GTKGDK_XIM
2413 if (GTK_EDITABLE(widget)->ic)
2414 gdk_im_begin (GTK_EDITABLE(widget)->ic, GTK_STEXT(widget)->text_area);
2415 #endif
2416
2417 draw_cursor (GTK_STEXT(widget), TRUE);
2418 GTK_STEXT(widget)->cursor_visible = TRUE;
2419 gtk_stext_enable_blink(GTK_STEXT(widget));
2420
2421 return FALSE;
2422 }
2423
2424 static gint
2425 gtk_stext_focus_out (GtkWidget *widget,
2426 GdkEventFocus *event)
2427 {
2428 g_return_val_if_fail (widget != NULL, FALSE);
2429 g_return_val_if_fail (GTK_IS_STEXT (widget), FALSE);
2430 g_return_val_if_fail (event != NULL, FALSE);
2431
2432 TDEBUG (("in gtk_stext_focus_out\n"));
2433
2434 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
2435 gtk_widget_draw_focus (widget);
2436
2437 /* SYLPHEED:
2438 * should disable blink before undrawing the cursor - disabling blink
2439 * redraws the cursor.
2440 */
2441 gtk_stext_disable_blink(GTK_STEXT(widget));
2442 undraw_cursor (GTK_STEXT(widget), TRUE);
2443 GTK_STEXT(widget)->cursor_visible = FALSE;
2444
2445 #ifdef USE_GTKGDK_XIM
2446 gdk_im_end ();
2447 #endif
2448
2449 return FALSE;
2450 }
2451
2452 static void
2453 gtk_stext_adjustment (GtkAdjustment *adjustment,
2454 GtkSText *text)
2455 {
2456 gfloat old_val;
2457
2458 g_return_if_fail (adjustment != NULL);
2459 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
2460 g_return_if_fail (text != NULL);
2461 g_return_if_fail (GTK_IS_STEXT (text));
2462
2463 /* Clamp the value here, because we'll get really confused
2464 * if someone tries to move the adjusment outside of the
2465 * allowed bounds
2466 */
2467 old_val = adjustment->value;
2468
2469 adjustment->value = MIN (adjustment->value, adjustment->upper - adjustment->page_size);
2470 adjustment->value = MAX (adjustment->value, 0.0);
2471
2472 if (adjustment->value != old_val)
2473 {
2474 gtk_signal_handler_block_by_func (GTK_OBJECT (adjustment),
2475 GTK_SIGNAL_FUNC (gtk_stext_adjustment),
2476 text);
2477 gtk_adjustment_changed (adjustment);
2478 gtk_signal_handler_unblock_by_func (GTK_OBJECT (adjustment),
2479 GTK_SIGNAL_FUNC (gtk_stext_adjustment),
2480 text);
2481 }
2482
2483 /* Just ignore it if we haven't been size-allocated and realized yet */
2484 if (text->line_start_cache == NULL)
2485 return;
2486
2487 if (adjustment == text->hadj)
2488 {
2489 g_warning ("horizontal scrolling not implemented");
2490 }
2491 else
2492 {
2493 gint diff = ((gint)adjustment->value) - text->last_ver_value;
2494
2495 if (diff != 0)
2496 {
2497 undraw_cursor (text, FALSE);
2498
2499 if (diff > 0)
2500 scroll_down (text, diff);
2501 else /* if (diff < 0) */
2502 scroll_up (text, diff);
2503
2504 draw_cursor (text, FALSE);
2505
2506 text->last_ver_value = adjustment->value;
2507 }
2508 }
2509 }
2510
2511 static void
2512 gtk_stext_disconnect (GtkAdjustment *adjustment,
2513 GtkSText *text)
2514 {
2515 g_return_if_fail (adjustment != NULL);
2516 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
2517 g_return_if_fail (text != NULL);
2518 g_return_if_fail (GTK_IS_STEXT (text));
2519
2520 if (adjustment == text->hadj)
2521 gtk_stext_set_adjustments (text, NULL, text->vadj);
2522 if (adjustment == text->vadj)
2523 gtk_stext_set_adjustments (text, text->hadj, NULL);
2524 }
2525
2526
2527 static GtkSPropertyMark
2528 find_this_line_start_mark (GtkSText* text, guint point_position, const GtkSPropertyMark* near)
2529 {
2530 GtkSPropertyMark mark;
2531
2532 mark = find_mark_near (text, point_position, near);
2533
2534 while (mark.index > 0 &&
2535 GTK_STEXT_INDEX (text, mark.index - 1) != LINE_DELIM)
2536 decrement_mark (&mark);
2537
2538 return mark;
2539 }
2540
2541 static void
2542 init_tab_cont (GtkSText* text, PrevTabCont* tab_cont)
2543 {
2544 tab_cont->pixel_offset = 0;
2545 tab_cont->tab_start.tab_stops = text->tab_stops;
2546 tab_cont->tab_start.to_next_tab = (gulong) text->tab_stops->data;
2547
2548 if (!tab_cont->tab_start.to_next_tab)
2549 tab_cont->tab_start.to_next_tab = text->default_tab_width;
2550 }
2551
2552 static void
2553 line_params_iterate (GtkSText* text,
2554 const GtkSPropertyMark* mark0,
2555 const PrevTabCont* tab_mark0,
2556 gint8 alloc,
2557 void* data,
2558 LineIteratorFunction iter)
2559 /* mark0 MUST be a real line start. if ALLOC, allocate line params
2560 * from a mem chunk. DATA is passed to ITER_CALL, which is called
2561 * for each line following MARK, iteration continues unless ITER_CALL
2562 * returns TRUE. */
2563 {
2564 GtkSPropertyMark mark = *mark0;
2565 PrevTabCont tab_conts[2];
2566 LineParams *lp, lpbuf;
2567 gint tab_cont_index = 0;
2568
2569 if (tab_mark0)
2570 tab_conts[0] = *tab_mark0;
2571 else
2572 init_tab_cont (text, tab_conts);
2573
2574 for (;;)
2575 {
2576 if (alloc)
2577 lp = g_chunk_new (LineParams, params_mem_chunk);
2578 else
2579 lp = &lpbuf;
2580
2581 *lp = find_line_params (text, &mark, tab_conts + tab_cont_index,
2582 tab_conts + (tab_cont_index + 1) % 2);
2583
2584 if ((*iter) (text, lp, data))
2585 return;
2586
2587 if (LAST_INDEX (text, lp->end))
2588 break;
2589
2590 mark = lp->end;
2591 advance_mark (&mark);
2592 tab_cont_index = (tab_cont_index + 1) % 2;
2593 }
2594 }
2595
2596 static gint
2597 fetch_lines_iterator (GtkSText* text, LineParams* lp, void* data)
2598 {
2599 FetchLinesData *fldata = (FetchLinesData*) data;
2600
2601 fldata->new_lines = g_list_prepend (fldata->new_lines, lp);
2602
2603 switch (fldata->fl_type)
2604 {
2605 case FetchLinesCount:
2606 if (!text->line_wrap || !lp->wraps)
2607 fldata->data += 1;
2608
2609 if (fldata->data >= fldata->data_max)
2610 return TRUE;
2611
2612 break;
2613 case FetchLinesPixels:
2614
2615 fldata->data += LINE_HEIGHT(*lp);
2616
2617 if (fldata->data >= fldata->data_max)
2618 return TRUE;
2619
2620 break;
2621 }
2622
2623 return FALSE;
2624 }
2625
2626 static GList*
2627 fetch_lines (GtkSText* text,
2628 const GtkSPropertyMark* mark0,
2629 const PrevTabCont* tab_cont0,
2630 FLType fl_type,
2631 gint data)
2632 {
2633 FetchLinesData fl_data;
2634
2635 fl_data.new_lines = NULL;
2636 fl_data.data = 0;
2637 fl_data.data_max = data;
2638 fl_data.fl_type = fl_type;
2639
2640 line_params_iterate (text, mark0, tab_cont0, TRUE, &fl_data, fetch_lines_iterator);
2641
2642 return g_list_reverse (fl_data.new_lines);
2643 }
2644
2645 static void
2646 fetch_lines_backward (GtkSText* text)
2647 {
2648 GList* new_lines = NULL, *new_line_start;
2649 GtkSPropertyMark mark;
2650
2651 if (CACHE_DATA(text->line_start_cache).start.index == 0)
2652 return;
2653
2654 mark = find_this_line_start_mark (text,
2655 CACHE_DATA(text->line_start_cache).start.index - 1,
2656 &CACHE_DATA(text->line_start_cache).start);
2657
2658 new_line_start = new_lines = fetch_lines (text, &mark, NULL, FetchLinesCount, 1);
2659
2660 while (new_line_start->next)
2661 new_line_start = new_line_start->next;
2662
2663 new_line_start->next = text->line_start_cache;
2664 text->line_start_cache->prev = new_line_start;
2665 }
2666
2667 static void
2668 fetch_lines_forward (GtkSText* text, gint line_count)
2669 {
2670 GtkSPropertyMark mark;
2671 GList* line = text->line_start_cache;
2672
2673 while(line->next)
2674 line = line->next;
2675
2676 mark = CACHE_DATA(line).end;
2677
2678 if (LAST_INDEX (text, mark))
2679 return;
2680
2681 advance_mark(&mark);
2682
2683 line->next = fetch_lines (text, &mark, &CACHE_DATA(line).tab_cont_next, FetchLinesCount, line_count);
2684
2685 if (line->next)
2686 line->next->prev = line;
2687 }
2688
2689 /* Compute the number of lines, and vertical pixels for n characters
2690 * starting from the point
2691 */
2692 static void
2693 compute_lines_pixels (GtkSText* text, guint char_count,
2694 guint *lines, guint *pixels)
2695 {
2696 GList *line = text->current_line;
2697 gint chars_left = char_count;
2698
2699 *lines = 0;
2700 *pixels = 0;
2701
2702 /* If chars_left == 0, that means we're joining two lines in a
2703 * deletion, so add in the values for the next line as well
2704 */
2705 for (; line && chars_left >= 0; line = line->next)
2706 {
2707 *pixels += LINE_HEIGHT(CACHE_DATA(line));
2708
2709 if (line == text->current_line)
2710 chars_left -= CACHE_DATA(line).end.index - text->point.index + 1;
2711 else
2712 chars_left -= CACHE_DATA(line).end.index - CACHE_DATA(line).start.index + 1;
2713
2714 if (!text->line_wrap || !CACHE_DATA(line).wraps)
2715 *lines += 1;
2716 else
2717 if (chars_left < 0)
2718 chars_left = 0; /* force another loop */
2719
2720 if (!line->next)
2721 fetch_lines_forward (text, 1);
2722 }
2723 }
2724
2725 static gint
2726 total_line_height (GtkSText* text, GList* line, gint line_count)
2727 {
2728 gint height = 0;
2729
2730 for (; line && line_count > 0; line = line->next)
2731 {
2732 height += LINE_HEIGHT(CACHE_DATA(line));
2733
2734 if (!text->line_wrap || !CACHE_DATA(line).wraps)
2735 line_count -= 1;
2736
2737 if (!line->next)
2738 fetch_lines_forward (text, line_count);
2739 }
2740
2741 return height;
2742 }
2743
2744 static void
2745 swap_lines (GtkSText* text, GList* old, GList* new, guint old_line_count)
2746 {
2747 if (old == text->line_start_cache)
2748 {
2749 GList* last;
2750
2751 for (; old_line_count > 0; old_line_count -= 1)
2752 {
2753 while (text->line_start_cache &&
2754 text->line_wrap &&
2755 CACHE_DATA(text->line_start_cache).wraps)
2756 remove_cache_line(text, text->line_start_cache);
2757
2758 remove_cache_line(text, text->line_start_cache);
2759 }
2760
2761 last = g_list_last (new);
2762
2763 last->next = text->line_start_cache;
2764
2765 if (text->line_start_cache)
2766 text->line_start_cache->prev = last;
2767
2768 text->line_start_cache = new;
2769 }
2770 else
2771 {
2772 GList *last;
2773
2774 g_assert (old->prev);
2775
2776 last = old->prev;
2777
2778 for (; old_line_count > 0; old_line_count -= 1)
2779 {
2780 while (old && text->line_wrap && CACHE_DATA(old).wraps)
2781 old = remove_cache_line (text, old);
2782
2783 old = remove_cache_line (text, old);
2784 }
2785
2786 last->next = new;
2787 new->prev = last;
2788
2789 last = g_list_last (new);
2790
2791 last->next = old;
2792
2793 if (old)
2794 old->prev = last;
2795 }
2796 }
2797
2798 static void
2799 correct_cache_delete (GtkSText* text, gint nchars, gint lines)
2800 {
2801 GList* cache = text->current_line;
2802 gint i;
2803
2804 for (i = 0; cache && i < lines; i += 1, cache = cache->next)
2805 /* nothing */;
2806
2807 for (; cache; cache = cache->next)
2808 {
2809 GtkSPropertyMark *start = &CACHE_DATA(cache).start;
2810 GtkSPropertyMark *end = &CACHE_DATA(cache).end;
2811
2812 start->index -= nchars;
2813 end->index -= nchars;
2814
2815 if (LAST_INDEX (text, text->point) &&
2816 start->index == text->point.index)
2817 *start = text->point;
2818 else if (start->property == text->point.property)
2819 start->offset = start->index - (text->point.index - text->point.offset);
2820
2821 if (LAST_INDEX (text, text->point) &&
2822 end->index == text->point.index)
2823 *end = text->point;
2824 if (end->property == text->point.property)
2825 end->offset = end->index - (text->point.index - text->point.offset);
2826
2827 /*TEXT_ASSERT_MARK(text, start, "start");*/
2828 /*TEXT_ASSERT_MARK(text, end, "end");*/
2829 }
2830 }
2831
2832 static void
2833 delete_expose (GtkSText* text, guint nchars, guint old_lines, guint old_pixels)
2834 {
2835 GtkWidget *widget = GTK_WIDGET (text);
2836
2837 gint pixel_height;
2838 guint new_pixels = 0;
2839 GdkRectangle rect;
2840 GList* new_line = NULL;
2841 gint width, height;
2842
2843 text->cursor_virtual_x = 0;
2844
2845 correct_cache_delete (text, nchars, old_lines);
2846
2847 pixel_height = pixel_height_of(text, text->current_line) -
2848 LINE_HEIGHT(CACHE_DATA(text->current_line));
2849
2850 if (CACHE_DATA(text->current_line).start.index == text->point.index)
2851 CACHE_DATA(text->current_line).start = text->point;
2852
2853 new_line = fetch_lines (text,
2854 &CACHE_DATA(text->current_line).start,
2855 &CACHE_DATA(text->current_line).tab_cont,
2856 FetchLinesCount,
2857 1);
2858
2859 swap_lines (text, text->current_line, new_line, old_lines);
2860
2861 text->current_line = new_line;
2862
2863 new_pixels = total_line_height (text, new_line, 1);
2864
2865 gdk_window_get_size (text->text_area, &width, &height);
2866
2867 if (old_pixels != new_pixels)
2868 {
2869 if (!widget->style->bg_pixmap[GTK_STATE_NORMAL])
2870 {
2871 gdk_draw_pixmap (text->text_area,
2872 text->gc,
2873 text->text_area,
2874 0,
2875 pixel_height + old_pixels,
2876 0,
2877 pixel_height + new_pixels,
2878 width,
2879 height);
2880 }
2881 text->vadj->upper += new_pixels;
2882 text->vadj->upper -= old_pixels;
2883 adjust_adj (text, text->vadj);
2884 }
2885
2886 rect.x = 0;
2887 rect.y = pixel_height;
2888 rect.width = width;
2889 rect.height = new_pixels;
2890
2891 expose_text (text, &rect, FALSE);
2892 gtk_stext_draw_focus ( (GtkWidget *) text);
2893
2894 text->cursor_mark = text->point;
2895
2896 find_cursor (text, TRUE);
2897
2898 if (old_pixels != new_pixels)
2899 {
2900 if (widget->style->bg_pixmap[GTK_STATE_NORMAL])
2901 {
2902 rect.x = 0;
2903 rect.y = pixel_height + new_pixels;
2904 rect.width = width;
2905 rect.height = height - rect.y;
2906
2907 expose_text (text, &rect, FALSE);
2908 }
2909 else
2910 process_exposes (text);
2911 }
2912
2913 TEXT_ASSERT (text);
2914 TEXT_SHOW(text);
2915 }
2916
2917 /* note, the point has already been moved forward */
2918 static void
2919 correct_cache_insert (GtkSText* text, gint nchars)
2920 {
2921 GList *cache;
2922 GtkSPropertyMark *start;
2923 GtkSPropertyMark *end;
2924
2925 /* If we inserted a property exactly at the beginning of the
2926 * line, we have to correct here, or fetch_lines will
2927 * fetch junk.
2928 */
2929 start = &CACHE_DATA(text->current_line).start;
2930 if (start->index == text->point.index - nchars)
2931 {
2932 *start = text->point;
2933 move_mark_n (start, -nchars);
2934 }
2935
2936 /* Now correct the offsets, and check for start or end marks that
2937 * are after the point, yet point to a property before the point's
2938 * property. This indicates that they are meant to point to the
2939 * second half of a property we split in insert_text_property(), so
2940 * we fix them up that way.
2941 */
2942 cache = text->current_line->next;
2943
2944 for (; cache; cache = cache->next)
2945 {
2946 start = &CACHE_DATA(cache).start;
2947 end = &CACHE_DATA(cache).end;
2948
2949 if (LAST_INDEX (text, text->point) &&
2950 start->index == text->point.index)
2951 *start = text->point;
2952 else
2953 {
2954 if (start->property == text->point.property)
2955 {
2956 start->offset += nchars;
2957 start->index += nchars;
2958 }
2959 else if (start->property->next &&
2960 (start->property->next->next == text->point.property))
2961 {
2962 /* We split the property, and this is the second half */
2963 start->offset -= MARK_CURRENT_PROPERTY (start)->length;
2964 start->index += nchars;
2965 start->property = text->point.property;
2966 }
2967 else
2968 start->index += nchars;
2969 }
2970
2971 if (LAST_INDEX (text, text->point) &&
2972 end->index == text->point.index)
2973 *end = text->point;
2974 else
2975 {
2976 if (end->property == text->point.property)
2977 {
2978 end->offset += nchars;
2979 end->index += nchars;
2980 }
2981 else if (end->property->next &&
2982 (end->property->next->next == text->point.property))
2983 {
2984 /* We split the property, and this is the second half */
2985 end->offset -= MARK_CURRENT_PROPERTY (end)->length;
2986 end->index += nchars;
2987 end->property = text->point.property;
2988 }
2989 else
2990 end->index += nchars;
2991 }
2992
2993 /*TEXT_ASSERT_MARK(text, start, "start");*/
2994 /*TEXT_ASSERT_MARK(text, end, "end");*/
2995 }
2996 }
2997
2998
2999 static void
3000 insert_expose (GtkSText* text, guint old_pixels, gint nchars,
3001 guint new_line_count)
3002 {
3003 GtkWidget *widget = GTK_WIDGET (text);
3004
3005 gint pixel_height;
3006 guint new_pixels = 0;
3007 GdkRectangle rect;
3008 GList* new_lines = NULL;
3009 gint width, height;
3010
3011 text->cursor_virtual_x = 0;
3012
3013 undraw_cursor (text, FALSE);
3014
3015 correct_cache_insert (text, nchars);
3016
3017 TEXT_SHOW_ADJ (text, text->vadj, "vadj");
3018
3019 pixel_height = pixel_height_of(text, text->current_line) -
3020 LINE_HEIGHT(CACHE_DATA(text->current_line));
3021
3022 new_lines = fetch_lines (text,
3023 &CACHE_DATA(text->current_line).start,
3024 &CACHE_DATA(text->current_line).tab_cont,
3025 FetchLinesCount,
3026 new_line_count);
3027
3028 swap_lines (text, text->current_line, new_lines, 1);
3029
3030 text->current_line = new_lines;
3031
3032 new_pixels = total_line_height (text, new_lines, new_line_count);
3033
3034 gdk_window_get_size (text->text_area, &width, &height);
3035
3036 if (old_pixels != new_pixels)
3037 {
3038 if (!widget->style->bg_pixmap[GTK_STATE_NORMAL])
3039 {
3040 gdk_draw_pixmap (text->text_area,
3041 text->gc,
3042 text->text_area,
3043 0,
3044 pixel_height + old_pixels,
3045 0,
3046 pixel_height + new_pixels,
3047 width,
3048 height + (old_pixels - new_pixels) - pixel_height);
3049
3050 }
3051 text->vadj->upper += new_pixels;
3052 text->vadj->upper -= old_pixels;
3053 adjust_adj (text, text->vadj);
3054 }
3055
3056 rect.x = 0;
3057 rect.y = pixel_height;
3058 rect.width = width;
3059 rect.height = new_pixels;
3060
3061 expose_text (text, &rect, FALSE);
3062 gtk_stext_draw_focus ( (GtkWidget *) text);
3063
3064 text->cursor_mark = text->point;
3065
3066 find_cursor (text, TRUE);
3067
3068 draw_cursor (text, FALSE);
3069
3070 if (old_pixels != new_pixels)
3071 {
3072 if (widget->style->bg_pixmap[GTK_STATE_NORMAL])
3073 {
3074 rect.x = 0;
3075 rect.y = pixel_height + new_pixels;
3076 rect.width = width;
3077 rect.height = height - rect.y;
3078
3079 expose_text (text, &rect, FALSE);
3080 }
3081 else
3082 process_exposes (text);
3083 }
3084
3085 TEXT_SHOW_ADJ (text, text->vadj, "vadj");
3086 TEXT_ASSERT (text);
3087 TEXT_SHOW(text);
3088 }
3089
3090 /* Text property functions */
3091
3092 static guint
3093 font_hash (gconstpointer font)
3094 {
3095 return gdk_font_id ((const GdkFont*) font);
3096 }
3097
3098 static GHashTable *font_cache_table = NULL;
3099
3100 static GtkSTextFont*
3101 get_text_font (GdkFont* gfont)
3102 {
3103 GtkSTextFont* tf;
3104 gint i;
3105
3106 if (!font_cache_table)
3107 font_cache_table = g_hash_table_new (font_hash, (GCompareFunc) gdk_font_equal);
3108
3109 tf = g_hash_table_lookup (font_cache_table, gfont);
3110
3111 if (tf)
3112 {
3113 tf->ref_count++;
3114 return tf;
3115 }
3116
3117 tf = g_new (GtkSTextFont, 1);
3118 tf->ref_count = 1;
3119
3120 tf->gdk_font = gfont;
3121 gdk_font_ref (gfont);
3122
3123 for(i = 0; i < 256; i += 1)
3124 tf->char_widths[i] = gdk_char_width (gfont, (char)i);
3125
3126 g_hash_table_insert (font_cache_table, gfont, tf);
3127
3128 return tf;
3129 }
3130
3131 static void
3132 text_font_unref (GtkSTextFont *text_font)
3133 {
3134 text_font->ref_count--;
3135 if (text_font->ref_count == 0)
3136 {
3137 g_hash_table_remove (font_cache_table, text_font->gdk_font);
3138 gdk_font_unref (text_font->gdk_font);
3139 g_free (text_font);
3140 }
3141 }
3142
3143 static gint
3144 text_properties_equal (TextProperty* prop, GdkFont* font, GdkColor *fore, GdkColor *back)
3145 {
3146 if (prop->flags & PROPERTY_FONT)
3147 {
3148 gboolean retval;
3149 GtkSTextFont *text_font;
3150
3151 if (!font)
3152 return FALSE;
3153
3154 text_font = get_text_font (font);
3155
3156 retval = (prop->font == text_font);
3157 text_font_unref (text_font);
3158
3159 if (!retval)
3160 return FALSE;
3161 }
3162 else
3163 if (font != NULL)
3164 return FALSE;
3165
3166 if (prop->flags & PROPERTY_FOREGROUND)
3167 {
3168 if (!fore || !gdk_color_equal (&prop->fore_color, fore))
3169 return FALSE;
3170 }
3171 else
3172 if (fore != NULL)
3173 return FALSE;
3174
3175 if (prop->flags & PROPERTY_BACKGROUND)
3176 {
3177 if (!back || !gdk_color_equal (&prop->back_color, back))
3178 return FALSE;
3179 }
3180 else
3181 if (back != NULL)
3182 return FALSE;
3183
3184 return TRUE;
3185 }
3186
3187 static void
3188 realize_property (GtkSText *text, TextProperty *prop)
3189 {
3190 GdkColormap *colormap = gtk_widget_get_colormap (GTK_WIDGET (text));
3191
3192 if (prop->flags & PROPERTY_FOREGROUND)
3193 gdk_colormap_alloc_color (colormap, &prop->fore_color, FALSE, FALSE);
3194
3195 if (prop->flags & PROPERTY_BACKGROUND)
3196 gdk_colormap_alloc_color (colormap, &prop->back_color, FALSE, FALSE);
3197 }
3198
3199 static void
3200 realize_properties (GtkSText *text)
3201 {
3202 GList *tmp_list = text->text_properties;
3203
3204 while (tmp_list)
3205 {
3206 realize_property (text, tmp_list->data);
3207
3208 tmp_list = tmp_list->next;
3209 }
3210 }
3211
3212 static void
3213 unrealize_property (GtkSText *text, TextProperty *prop)
3214 {
3215 GdkColormap *colormap = gtk_widget_get_colormap (GTK_WIDGET (text));
3216
3217 if (prop->flags & PROPERTY_FOREGROUND)
3218 gdk_colormap_free_colors (colormap, &prop->fore_color, 1);
3219
3220 if (prop->flags & PROPERTY_BACKGROUND)
3221 gdk_colormap_free_colors (colormap, &prop->back_color, 1);
3222 }
3223
3224 static void
3225 unrealize_properties (GtkSText *text)
3226 {
3227 GList *tmp_list = text->text_properties;
3228
3229 while (tmp_list)
3230 {
3231 unrealize_property (text, tmp_list->data);
3232
3233 tmp_list = tmp_list->next;
3234 }
3235 }
3236
3237 static TextProperty*
3238 new_text_property (GtkSText *text, GdkFont *font, GdkColor* fore,
3239 GdkColor* back, guint length)
3240 {
3241 TextProperty *prop;
3242
3243 if (text_property_chunk == NULL)
3244 {
3245 text_property_chunk = g_mem_chunk_new ("text property mem chunk",
3246 sizeof(TextProperty),
3247 1024*sizeof(TextProperty),
3248 G_ALLOC_AND_FREE);
3249 }
3250
3251 prop = g_chunk_new(TextProperty, text_property_chunk);
3252
3253 prop->flags = 0;
3254 if (font)
3255 {
3256 prop->flags |= PROPERTY_FONT;
3257 prop->font = get_text_font (font);
3258 }
3259 else
3260 prop->font = NULL;
3261
3262 if (fore)
3263 {
3264 prop->flags |= PROPERTY_FOREGROUND;
3265 prop->fore_color = *fore;
3266 }
3267
3268 if (back)
3269 {
3270 prop->flags |= PROPERTY_BACKGROUND;
3271 prop->back_color = *back;
3272 }
3273
3274 prop->length = length;
3275
3276 if (GTK_WIDGET_REALIZED (text))
3277 realize_property (text, prop);
3278
3279 return prop;
3280 }
3281
3282 static void
3283 destroy_text_property (TextProperty *prop)
3284 {
3285 if (prop->font)
3286 text_font_unref (prop->font);
3287
3288 g_mem_chunk_free (text_property_chunk, prop);
3289 }
3290
3291 /* Flop the memory between the point and the gap around like a
3292 * dead fish. */
3293 static void
3294 move_gap (GtkSText* text, guint index)
3295 {
3296 if (text->gap_position < index)
3297 {
3298 gint diff = index - text->gap_position;
3299
3300 if (text->use_wchar)
3301 g_memmove (text->text.wc + text->gap_position,
3302 text->text.wc + text->gap_position + text->gap_size,
3303 diff*sizeof (GdkWChar));
3304 else
3305 g_memmove (text->text.ch + text->gap_position,
3306 text->text.ch + text->gap_position + text->gap_size,
3307 diff);
3308
3309 text->gap_position = index;
3310 }
3311 else if (text->gap_position > index)
3312 {
3313 gint diff = text->gap_position - index;
3314
3315 if (text->use_wchar)
3316 g_memmove (text->text.wc + index + text->gap_size,
3317 text->text.wc + index,
3318 diff*sizeof (GdkWChar));
3319 else
3320 g_memmove (text->text.ch + index + text->gap_size,
3321 text->text.ch + index,
3322 diff);
3323
3324 text->gap_position = index;
3325 }
3326 }
3327
3328 /* Increase the gap size. */
3329 static void
3330 make_forward_space (GtkSText* text, guint len)
3331 {
3332 if (text->gap_size < len)
3333 {
3334 guint sum = MAX(2*len, MIN_GAP_SIZE) + text->text_end;
3335
3336 if (sum >= text->text_len)
3337 {
3338 guint i = 1;
3339
3340 while (i <= sum) i <<= 1;
3341
3342 if (text->use_wchar)
3343 text->text.wc = (GdkWChar *)g_realloc(text->text.wc,
3344 i*sizeof(GdkWChar));
3345 else
3346 text->text.ch = (guchar *)g_realloc(text->text.ch, i);
3347 text->text_len = i;
3348 }
3349
3350 if (text->use_wchar)
3351 g_memmove (text->text.wc + text->gap_position + text->gap_size + 2*len,
3352 text->text.wc + text->gap_position + text->gap_size,
3353 (text->text_end - (text->gap_position + text->gap_size))
3354 *sizeof(GdkWChar));
3355 else
3356 g_memmove (text->text.ch + text->gap_position + text->gap_size + 2*len,
3357 text->text.ch + text->gap_position + text->gap_size,
3358 text->text_end - (text->gap_position + text->gap_size));
3359
3360 text->text_end += len*2;
3361 text->gap_size += len*2;
3362 }
3363 }
3364
3365 /* Inserts into the text property list a list element that guarantees
3366 * that for len characters following the point, text has the correct
3367 * property. does not move point. adjusts text_properties_point and
3368 * text_properties_point_offset relative to the current value of
3369 * point. */
3370 static void
3371 insert_text_property (GtkSText* text, GdkFont* font,
3372 GdkColor *fore, GdkColor* back, guint len)
3373 {
3374 GtkSPropertyMark *mark = &text->point;
3375 TextProperty* forward_prop = MARK_CURRENT_PROPERTY(mark);
3376 TextProperty* backward_prop = MARK_PREV_PROPERTY(mark);
3377
3378 if (MARK_OFFSET(mark) == 0)
3379 {
3380 /* Point is on the boundary of two properties.
3381 * If it is the same as either, grow, else insert
3382 * a new one. */
3383
3384 if (text_properties_equal(forward_prop, font, fore, back))
3385 {
3386 /* Grow the property in front of us. */
3387
3388 MARK_PROPERTY_LENGTH(mark) += len;
3389 }
3390 else if (backward_prop &&
3391 text_properties_equal(backward_prop, font, fore, back))
3392 {
3393 /* Grow property behind us, point property and offset
3394 * change. */
3395
3396 SET_PROPERTY_MARK (&text->point,
3397 MARK_PREV_LIST_PTR (mark),
3398 backward_prop->length);
3399
3400 backward_prop->length += len;
3401 }
3402 else if ((MARK_NEXT_LIST_PTR(mark) == NULL) &&
3403 (forward_prop->length == 1))
3404 {
3405 /* Next property just has last position, take it over */
3406
3407 if (GTK_WIDGET_REALIZED (text))
3408 unrealize_property (text, forward_prop);
3409
3410 forward_prop->flags = 0;
3411 if (font)
3412 {
3413 forward_prop->flags |= PROPERTY_FONT;
3414 forward_prop->font = get_text_font (font);
3415 }
3416 else
3417 forward_prop->font = NULL;
3418
3419 if (fore)
3420 {
3421 forward_prop->flags |= PROPERTY_FOREGROUND;
3422 forward_prop->fore_color = *fore;
3423 }
3424 if (back)
3425 {
3426 forward_prop->flags |= PROPERTY_BACKGROUND;
3427 forward_prop->back_color = *back;
3428 }
3429 forward_prop->length += len;
3430
3431 if (GTK_WIDGET_REALIZED (text))
3432 realize_property (text, forward_prop);
3433 }
3434 else
3435 {
3436 /* Splice a new property into the list. */
3437
3438 GList* new_prop = g_list_alloc();
3439
3440 new_prop->next = MARK_LIST_PTR(mark);
3441 new_prop->prev = MARK_PREV_LIST_PTR(mark);
3442 new_prop->next->prev = new_prop;
3443
3444 if (new_prop->prev)
3445 new_prop->prev->next = new_prop;
3446
3447 new_prop->data = new_text_property (text, font, fore, back, len);
3448
3449 SET_PROPERTY_MARK (mark, new_prop, 0);
3450 }
3451 }
3452 else
3453 {
3454 /* The following will screw up the line_start cache,
3455 * we'll fix it up in correct_cache_insert
3456 */
3457
3458 /* In the middle of forward_prop, if properties are equal,
3459 * just add to its length, else split it into two and splice
3460 * in a new one. */
3461 if (text_properties_equal (forward_prop, font, fore, back))
3462 {
3463 forward_prop->length += len;
3464 }
3465 else if ((MARK_NEXT_LIST_PTR(mark) == NULL) &&
3466 (MARK_OFFSET(mark) + 1 == forward_prop->length))
3467 {
3468 /* Inserting before only the last position in the text */
3469
3470 GList* new_prop;
3471 forward_prop->length -= 1;
3472
3473 new_prop = g_list_alloc();
3474 new_prop->data = new_text_property (text, font, fore, back, len+1);
3475 new_prop->prev = MARK_LIST_PTR(mark);
3476 new_prop->next = NULL;
3477 MARK_NEXT_LIST_PTR(mark) = new_prop;
3478
3479 SET_PROPERTY_MARK (mark, new_prop, 0);
3480 }
3481 else
3482 {
3483 GList* new_prop = g_list_alloc();
3484 GList* new_prop_forward = g_list_alloc();
3485 gint old_length = forward_prop->length;
3486 GList* next = MARK_NEXT_LIST_PTR(mark);
3487
3488 /* Set the new lengths according to where they are split. Construct
3489 * two new properties. */
3490 forward_prop->length = MARK_OFFSET(mark);
3491
3492 new_prop_forward->data =
3493 new_text_property(text,
3494 forward_prop->flags & PROPERTY_FONT ?
3495 forward_prop->font->gdk_font : NULL,
3496 forward_prop->flags & PROPERTY_FOREGROUND ?
3497 &forward_prop->fore_color : NULL,
3498 forward_prop->flags & PROPERTY_BACKGROUND ?
3499 &forward_prop->back_color : NULL,
3500 old_length - forward_prop->length);
3501
3502 new_prop->data = new_text_property(text, font, fore, back, len);
3503
3504 /* Now splice things in. */
3505 MARK_NEXT_LIST_PTR(mark) = new_prop;
3506 new_prop->prev = MARK_LIST_PTR(mark);
3507
3508 new_prop->next = new_prop_forward;
3509 new_prop_forward->prev = new_prop;
3510
3511 new_prop_forward->next = next;
3512
3513 if (next)
3514 next->prev = new_prop_forward;
3515
3516 SET_PROPERTY_MARK (mark, new_prop, 0);
3517 }
3518 }
3519
3520 while (text->text_properties_end->next)
3521 text->text_properties_end = text->text_properties_end->next;
3522
3523 while (text->text_properties->prev)
3524 text->text_properties = text->text_properties->prev;
3525 }
3526
3527 static void
3528 delete_text_property (GtkSText* text, guint nchars)
3529 {
3530 /* Delete nchars forward from point. */
3531
3532 /* Deleting text properties is problematical, because we
3533 * might be storing around marks pointing to a property.
3534 *
3535 * The marks in question and how we handle them are:
3536 *
3537 * point: We know the new value, since it will be at the
3538 * end of the deleted text, and we move it there
3539 * first.
3540 * cursor: We just remove the mark and set it equal to the
3541 * point after the operation.
3542 * line-start cache: We replace most affected lines.
3543 * The current line gets used to fetch the new
3544 * lines so, if necessary, (delete at the beginning
3545 * of a line) we fix it up by setting it equal to the
3546 * point.
3547 */
3548
3549 TextProperty *prop;
3550 GList *tmp;
3551 gint is_first;
3552
3553 for(; nchars; nchars -= 1)
3554 {
3555 prop = MARK_CURRENT_PROPERTY(&text->point);
3556
3557 prop->length -= 1;
3558
3559 if (prop->length == 0)
3560 {
3561 tmp = MARK_LIST_PTR (&text->point);
3562
3563 is_first = tmp == text->text_properties;
3564
3565 MARK_LIST_PTR (&text->point) = g_list_remove_link (tmp, tmp);
3566 text->point.offset = 0;
3567
3568 if (GTK_WIDGET_REALIZED (text))
3569 unrealize_property (text, prop);
3570
3571 destroy_text_property (prop);
3572 g_list_free_1 (tmp);
3573
3574 prop = MARK_CURRENT_PROPERTY (&text->point);
3575
3576 if (is_first)
3577 text->text_properties = MARK_LIST_PTR (&text->point);
3578
3579 g_assert (prop->length != 0);
3580 }
3581 else if (prop->length == text->point.offset)
3582 {
3583 MARK_LIST_PTR (&text->point) = MARK_NEXT_LIST_PTR (&text->point);
3584 text->point.offset = 0;
3585 }
3586 }
3587
3588 /* Check to see if we have just the single final position remaining
3589 * along in a property; if so, combine it with the previous property
3590 */
3591 if (LAST_INDEX (text, text->point) &&
3592 (MARK_OFFSET (&text->point) == 0) &&
3593 (MARK_PREV_LIST_PTR(&text->point) != NULL))
3594 {
3595 tmp = MARK_LIST_PTR (&text->point);
3596 prop = MARK_CURRENT_PROPERTY(&text->point);
3597
3598 MARK_LIST_PTR (&text->point) = MARK_PREV_LIST_PTR (&text->point);
3599 MARK_CURRENT_PROPERTY(&text->point)->length += 1;
3600 MARK_NEXT_LIST_PTR(&text->point) = NULL;
3601
3602 text->point.offset = MARK_CURRENT_PROPERTY(&text->point)->length - 1;
3603
3604 if (GTK_WIDGET_REALIZED (text))
3605 unrealize_property (text, prop);
3606
3607 destroy_text_property (prop);
3608 g_list_free_1 (tmp);
3609 }
3610 }
3611
3612 static void
3613 init_properties (GtkSText *text)
3614 {
3615 if (!text->text_properties)
3616 {
3617 text->text_properties = g_list_alloc();
3618 text->text_properties->next = NULL;
3619 text->text_properties->prev = NULL;
3620 text->text_properties->data = new_text_property (text, NULL, NULL, NULL, 1);
3621 text->text_properties_end = text->text_properties;
3622
3623 SET_PROPERTY_MARK (&text->point, text->text_properties, 0);
3624
3625 text->point.index = 0;
3626 }
3627 }
3628
3629
3630 /**********************************************************************/
3631 /* Property Movement */
3632 /**********************************************************************/
3633
3634 static void
3635 move_mark_n (GtkSPropertyMark* mark, gint n)
3636 {
3637 if (n > 0)
3638 advance_mark_n(mark, n);
3639 else if (n < 0)
3640 decrement_mark_n(mark, -n);
3641 }
3642
3643 static void
3644 advance_mark (GtkSPropertyMark* mark)
3645 {
3646 TextProperty* prop = MARK_CURRENT_PROPERTY (mark);
3647
3648 mark->index += 1;
3649
3650 if (prop->length > mark->offset + 1)
3651 mark->offset += 1;
3652 else
3653 {
3654 mark->property = MARK_NEXT_LIST_PTR (mark);
3655 mark->offset = 0;
3656 }
3657 }
3658
3659 static void
3660 advance_mark_n (GtkSPropertyMark* mark, gint n)
3661 {
3662 gint i;
3663 TextProperty* prop;
3664
3665 g_assert (n > 0);
3666
3667 i = 0; /* otherwise it migth not be init. */
3668 prop = MARK_CURRENT_PROPERTY(mark);
3669
3670 if ((prop->length - mark->offset - 1) < n) { /* if we need to change prop. */
3671 /* to make it easier */
3672 n += (mark->offset);
3673 mark->index -= mark->offset;
3674 mark->offset = 0;
3675 /* first we take seven-mile-leaps to get to the right text
3676 * property. */
3677 while ((n-i) > prop->length - 1) {
3678 i += prop->length;
3679 mark->index += prop->length;
3680 mark->property = MARK_NEXT_LIST_PTR (mark);
3681 prop = MARK_CURRENT_PROPERTY (mark);
3682 }
3683 }
3684
3685 /* and then the rest */
3686 mark->index += n - i;
3687 mark->offset += n - i;
3688 }
3689
3690 static void
3691 decrement_mark (GtkSPropertyMark* mark)
3692 {
3693 mark->index -= 1;
3694
3695 if (mark->offset > 0)
3696 mark->offset -= 1;
3697 else
3698 {
3699 mark->property = MARK_PREV_LIST_PTR (mark);
3700 mark->offset = MARK_CURRENT_PROPERTY (mark)->length - 1;
3701 }
3702 }
3703
3704 static void
3705 decrement_mark_n (GtkSPropertyMark* mark, gint n)
3706 {
3707 g_assert (n > 0);
3708
3709 while (mark->offset < n) {
3710 /* jump to end of prev */
3711 n -= mark->offset + 1;
3712 mark->index -= mark->offset + 1;
3713 mark->property = MARK_PREV_LIST_PTR (mark);
3714 mark->offset = MARK_CURRENT_PROPERTY (mark)->length - 1;
3715 }
3716
3717 /* and the rest */
3718 mark->index -= n;
3719 mark->offset -= n;
3720 }
3721
3722 static GtkSPropertyMark
3723 find_mark (GtkSText* text, guint mark_position)
3724 {
3725 return find_mark_near (text, mark_position, &text->point);
3726 }
3727
3728 /*
3729 * You can also start from the end, what a drag.
3730 */
3731 static GtkSPropertyMark
3732 find_mark_near (GtkSText* text, guint mark_position, const GtkSPropertyMark* near)
3733 {
3734 gint diffa;
3735 gint diffb;
3736
3737 GtkSPropertyMark mark;
3738
3739 if (!near)
3740 diffa = mark_position + 1;
3741 else
3742 diffa = mark_position - near->index;
3743
3744 diffb = mark_position;
3745
3746 if (diffa < 0)
3747 diffa = -diffa;
3748
3749 if (diffa <= diffb)
3750 {
3751 mark = *near;
3752 }
3753 else
3754 {
3755 mark.index = 0;
3756 mark.property = text->text_properties;
3757 mark.offset = 0;
3758 }
3759
3760 move_mark_n (&mark, mark_position - mark.index);
3761
3762 return mark;
3763 }
3764
3765 /* This routine must be called with scroll == FALSE, only when
3766 * point is at least partially on screen
3767 */
3768
3769 static void
3770 find_line_containing_point (GtkSText* text, guint point,
3771 gboolean scroll)
3772 {
3773 GList* cache;
3774 gint height;
3775
3776 text->current_line = NULL;
3777
3778 TEXT_SHOW (text);
3779
3780 /* Scroll backwards until the point is on screen
3781 */
3782 while (CACHE_DATA(text->line_start_cache).start.index > point)
3783 scroll_int (text, - LINE_HEIGHT(CACHE_DATA(text->line_start_cache)));
3784
3785 /* Now additionally try to make sure that the point is fully on screen
3786 */
3787 if (scroll)
3788 {
3789 while (text->first_cut_pixels != 0 &&
3790 text->line_start_cache->next &&
3791 CACHE_DATA(text->line_start_cache->next).start.index > point)
3792 scroll_int (text, - LINE_HEIGHT(CACHE_DATA(text->line_start_cache->next)));
3793 }
3794
3795 gdk_window_get_size (text->text_area, NULL, &height);
3796
3797 for (cache = text->line_start_cache; cache; cache = cache->next)
3798 {
3799 guint lph;
3800
3801 if (CACHE_DATA(cache).end.index >= point ||
3802 LAST_INDEX(text, CACHE_DATA(cache).end))
3803 {
3804 text->current_line = cache; /* LOOK HERE, this proc has an
3805 * important side effect. */
3806 return;
3807 }
3808
3809 TEXT_SHOW_LINE (text, cache, "cache");
3810
3811 if (cache->next == NULL)
3812 fetch_lines_forward (text, 1);
3813
3814 if (scroll)
3815 {
3816 lph = pixel_height_of (text, cache->next);
3817
3818 /* Scroll the bottom of the line is on screen, or until
3819 * the line is the first onscreen line.
3820 */
3821 while (cache->next != text->line_start_cache && lph > height)
3822 {
3823 TEXT_SHOW_LINE (text, cache, "cache");
3824 TEXT_SHOW_LINE (text, cache->next, "cache->next");
3825 scroll_int (text, LINE_HEIGHT(CACHE_DATA(cache->next)));
3826 lph = pixel_height_of (text, cache->next);
3827 }
3828 }
3829 }
3830
3831 g_assert_not_reached (); /* Must set text->current_line here */
3832 }
3833
3834 static guint
3835 pixel_height_of (GtkSText* text, GList* cache_line)
3836 {
3837 gint pixels = - text->first_cut_pixels;
3838 GList *cache = text->line_start_cache;
3839
3840 while (TRUE) {
3841 pixels += LINE_HEIGHT (CACHE_DATA(cache));
3842
3843 if (cache->data == cache_line->data)
3844 break;
3845
3846 cache = cache->next;
3847 }
3848
3849 return pixels;
3850 }
3851
3852 /**********************************************************************/
3853 /* Search and Placement */
3854 /**********************************************************************/
3855
3856 static gint
3857 find_char_width (GtkSText* text, const GtkSPropertyMark *mark, const TabStopMark *tab_mark)
3858 {
3859 GdkWChar ch;
3860 gint16* char_widths;
3861
3862 if (LAST_INDEX (text, *mark))
3863 return 0;
3864
3865 ch = GTK_STEXT_INDEX (text, mark->index);
3866 char_widths = MARK_CURRENT_TEXT_FONT (text, mark)->char_widths;
3867
3868 if (ch == '\t')
3869 {
3870 return tab_mark->to_next_tab * char_widths[' '];
3871 }
3872 else if (!text->use_wchar)
3873 {
3874 return char_widths[ch];
3875 }
3876 else
3877 {
3878 return gdk_char_width_wc(MARK_CURRENT_TEXT_FONT(text, mark)->gdk_font, ch);
3879 }
3880 }
3881
3882 static void
3883 advance_tab_mark (GtkSText* text, TabStopMark* tab_mark, GdkWChar ch)
3884 {
3885 if (tab_mark->to_next_tab == 1 || ch == '\t')
3886 {
3887 if (tab_mark->tab_stops->next)
3888 {
3889 tab_mark->tab_stops = tab_mark->tab_stops->next;
3890 tab_mark->to_next_tab = (gulong) tab_mark->tab_stops->data;
3891 }
3892 else
3893 {
3894 tab_mark->to_next_tab = text->default_tab_width;
3895 }
3896 }
3897 else
3898 {
3899 tab_mark->to_next_tab -= 1;
3900 }
3901 }
3902
3903 static void
3904 advance_tab_mark_n (GtkSText* text, TabStopMark* tab_mark, gint n)
3905 /* No tabs! */
3906 {
3907 while (n--)
3908 advance_tab_mark (text, tab_mark, 0);
3909 }
3910
3911 static void
3912 find_cursor_at_line (GtkSText* text, const LineParams* start_line, gint pixel_height)
3913 {
3914 GdkWChar ch;
3915 GtkEditable *editable = (GtkEditable *)text;
3916
3917 GtkSPropertyMark mark = start_line->start;
3918 TabStopMark tab_mark = start_line->tab_cont.tab_start;
3919 gint pixel_width = LINE_START_PIXEL (*start_line);
3920
3921 while (mark.index < text->cursor_mark.index)
3922 {
3923 pixel_width += find_char_width (text, &mark, &tab_mark);
3924
3925 advance_tab_mark (text, &tab_mark, GTK_STEXT_INDEX(text, mark.index));
3926 advance_mark (&mark);
3927 }
3928
3929 text->cursor_pos_x = pixel_width;
3930 text->cursor_pos_y = pixel_height;
3931 text->cursor_char_offset = start_line->font_descent;
3932 text->cursor_mark = mark;
3933
3934 ch = LAST_INDEX (text, mark) ?
3935 LINE_DELIM : GTK_STEXT_INDEX (text, mark.index);
3936
3937 if ((text->use_wchar) ? gdk_iswspace (ch) : isspace (ch))
3938 text->cursor_char = 0;
3939 else
3940 text->cursor_char = ch;
3941
3942 #ifdef USE_GTKGDK_XIM
3943 if (GTK_WIDGET_HAS_FOCUS(text) && gdk_im_ready() && editable->ic &&
3944 (gdk_ic_get_style (editable->ic) & GDK_IM_PREEDIT_POSITION))
3945 {
3946 GdkICAttributesType mask = GDK_IC_SPOT_LOCATION |
3947 GDK_IC_PREEDIT_FOREGROUND |
3948 GDK_IC_PREEDIT_BACKGROUND;
3949
3950 editable->ic_attr->spot_location.x = text->cursor_pos_x;
3951 editable->ic_attr->spot_location.y
3952 = text->cursor_pos_y - text->cursor_char_offset;
3953 editable->ic_attr->preedit_foreground = *MARK_CURRENT_FORE (text, &mark);
3954 editable->ic_attr->preedit_background = *MARK_CURRENT_BACK (text, &mark);
3955
3956 if (MARK_CURRENT_FONT (text, &mark)->type == GDK_FONT_FONTSET)
3957 {
3958 mask |= GDK_IC_PREEDIT_FONTSET;
3959 editable->ic_attr->preedit_fontset = MARK_CURRENT_FONT (text, &mark);
3960 }
3961
3962 gdk_ic_set_attr (editable->ic, editable->ic_attr, mask);
3963 }
3964 #endif
3965 }
3966
3967 static void
3968 find_cursor (GtkSText* text, gboolean scroll)
3969 {
3970 if (GTK_WIDGET_REALIZED (text))
3971 {
3972 find_line_containing_point (text, text->cursor_mark.index, scroll);
3973
3974 if (text->current_line)
3975 find_cursor_at_line (text,
3976 &CACHE_DATA(text->current_line),
3977 pixel_height_of(text, text->current_line));
3978 }
3979
3980 GTK_EDITABLE (text)->current_pos = text->cursor_mark.index;
3981 }
3982
3983 static void
3984 find_mouse_cursor_at_line (GtkSText *text, const LineParams* lp,
3985 guint line_pixel_height,
3986 gint button_x)
3987 {
3988 GtkSPropertyMark mark = lp->start;
3989 TabStopMark tab_mark = lp->tab_cont.tab_start;
3990
3991 gint char_width = find_char_width(text, &mark, &tab_mark);
3992 gint pixel_width = LINE_START_PIXEL (*lp) + (char_width+1)/2;
3993
3994 text->cursor_pos_y = line_pixel_height;
3995
3996 for (;;)
3997 {
3998 GdkWChar ch = LAST_INDEX (text, mark) ?
3999 LINE_DELIM : GTK_STEXT_INDEX (text, mark.index);
4000
4001 if (button_x < pixel_width || mark.index == lp->end.index)
4002 {
4003 text->cursor_pos_x = pixel_width - (char_width+1)/2;
4004 text->cursor_mark = mark;
4005 text->cursor_char_offset = lp->font_descent;
4006
4007 if ((text->use_wchar) ? gdk_iswspace (ch) : isspace (ch))
4008 text->cursor_char = 0;
4009 else
4010 text->cursor_char = ch;
4011
4012 break;
4013 }
4014
4015 advance_tab_mark (text, &tab_mark, ch);
4016 advance_mark (&mark);
4017
4018 pixel_width += char_width/2;
4019
4020 char_width = find_char_width (text, &mark, &tab_mark);
4021
4022 pixel_width += (char_width+1)/2;
4023 }
4024 }
4025
4026 static void
4027 find_mouse_cursor (GtkSText* text, gint x, gint y)
4028 {
4029 gint pixel_height;
4030 GList* cache = text->line_start_cache;
4031
4032 g_assert (cache);
4033
4034 pixel_height = - text->first_cut_pixels;
4035
4036 for (; cache; cache = cache->next)
4037 {
4038 pixel_height += LINE_HEIGHT(CACHE_DATA(cache));
4039
4040 if (y < pixel_height || !cache->next)
4041 {
4042 find_mouse_cursor_at_line (text, &CACHE_DATA(cache), pixel_height, x);
4043
4044 find_cursor (text, FALSE);
4045
4046 return;
4047 }
4048 }
4049 }
4050
4051 /**********************************************************************/
4052 /* Cache Manager */
4053 /**********************************************************************/
4054
4055 static void
4056 free_cache (GtkSText* text)
4057 {
4058 GList* cache = text->line_start_cache;
4059
4060 if (cache)
4061 {
4062 while (cache->prev)
4063 cache = cache->prev;
4064
4065 text->line_start_cache = cache;
4066 }
4067
4068 for (; cache; cache = cache->next)
4069 g_mem_chunk_free (params_mem_chunk, cache->data);
4070
4071 g_list_free (text->line_start_cache);
4072
4073 text->line_start_cache = NULL;
4074 }
4075
4076 static GList*
4077 remove_cache_line (GtkSText* text, GList* member)
4078 {
4079 GList *list;
4080
4081 if (member == NULL)
4082 return NULL;
4083
4084 if (member == text->line_start_cache)
4085 text->line_start_cache = text->line_start_cache->next;
4086
4087 if (member->prev)
4088 member->prev->next = member->next;
4089
4090 if (member->next)
4091 member->next->prev = member->prev;
4092
4093 list = member->next;
4094
4095 g_mem_chunk_free (params_mem_chunk, member->data);
4096 g_list_free_1 (member);
4097
4098 return list;
4099 }
4100
4101 /**********************************************************************/
4102 /* Key Motion */
4103 /**********************************************************************/
4104
4105 static void
4106 move_cursor_buffer_ver (GtkSText *text, int dir)
4107 {
4108 undraw_cursor (text, FALSE);
4109
4110 if (dir > 0)
4111 {
4112 scroll_int (text, text->vadj->upper);
4113 text->cursor_mark = find_this_line_start_mark (text,
4114 TEXT_LENGTH (text),
4115 &text->cursor_mark);
4116 }
4117 else
4118 {
4119 scroll_int (text, - text->vadj->value);
4120 text->cursor_mark = find_this_line_start_mark (text,
4121 0,
4122 &text->cursor_mark);
4123 }
4124
4125 find_cursor (text, TRUE);
4126 draw_cursor (text, FALSE);
4127 }
4128
4129 static void
4130 move_cursor_page_ver (GtkSText *text, int dir)
4131 {
4132 scroll_int (text, dir * text->vadj->page_increment);
4133 }
4134
4135 static void
4136 move_cursor_ver (GtkSText *text, int count)
4137 {
4138 gint i;
4139 GtkSPropertyMark mark;
4140 gint offset;
4141
4142 mark = find_this_line_start_mark (text, text->cursor_mark.index, &text->cursor_mark);
4143 offset = text->cursor_mark.index - mark.index;
4144
4145 if (offset > text->cursor_virtual_x)
4146 text->cursor_virtual_x = offset;
4147
4148 if (count < 0)
4149 {
4150 if (mark.index == 0)
4151 return;
4152
4153 decrement_mark (&mark);
4154 mark = find_this_line_start_mark (text, mark.index, &mark);
4155 }
4156 else
4157 {
4158 mark = text->cursor_mark;
4159
4160 while (!LAST_INDEX(text, mark) && GTK_STEXT_INDEX(text, mark.index) != LINE_DELIM)
4161 advance_mark (&mark);
4162
4163 if (LAST_INDEX(text, mark))
4164 return;
4165
4166 advance_mark (&mark);
4167 }
4168
4169 for (i=0; i < text->cursor_virtual_x; i += 1, advance_mark(&mark))
4170 if (LAST_INDEX(text, mark) ||
4171 GTK_STEXT_INDEX(text, mark.index) == LINE_DELIM)
4172 break;
4173
4174 undraw_cursor (text, FALSE);
4175
4176 text->cursor_mark = mark;
4177
4178 find_cursor (text, TRUE);
4179
4180 draw_cursor (text, FALSE);
4181 }
4182
4183 static void
4184 move_cursor_hor (GtkSText *text, int count)
4185 {
4186 /* count should be +-1. */
4187 if ( (count > 0 && text->cursor_mark.index + count > TEXT_LENGTH(text)) ||
4188 (count < 0 && text->cursor_mark.index < (- count)) ||
4189 (count == 0) )
4190 return;
4191
4192 text->cursor_virtual_x = 0;
4193
4194 undraw_cursor (text, FALSE);
4195
4196 move_mark_n (&text->cursor_mark, count);
4197
4198 find_cursor (text, TRUE);
4199
4200 draw_cursor (text, FALSE);
4201 }
4202
4203 /* SYLPHEED - the default cursor movement of GtkText is aeons ahead of the
4204 * current technology level of the current generation of programmers and
4205 * end users. so sylpheed has to take a more mundane approach to editing.
4206 *
4207 * implemented:
4208 * move_cursor_to_display_row_end() (end of display line)
4209 * move_cursor_to_display_row_home() (home of display line)
4210 * move_cursor_to_display_row_up() (line up)
4211 * move_cursor_to_display_row_down() (line down)
4212 */
4213
4214 /*
4215 * SYLPHEED_TODO: for some reason the line fetcher also returns markers
4216 * of just one character! should investigate this... -- alfons
4217 */
4218
4219 static void move_cursor_to_display_row_end(GtkSText *text)
4220 {
4221 LineParams lp = CACHE_DATA(text->current_line);
4222 int to_move = (lp.end.index - text->cursor_mark.index);
4223
4224 /* advance this much */
4225 if (to_move > 0) {
4226 move_cursor_hor(text, to_move);
4227 }
4228 }
4229
4230 static void move_cursor_to_display_row_start(GtkSText *text)
4231 {
4232 LineParams lp = CACHE_DATA(text->current_line);
4233 int to_move = (text->cursor_mark.index - lp.start.index);
4234 if (to_move > 0) {
4235 move_cursor_hor(text, -to_move);
4236 }
4237 }
4238
4239 /* dumb */
4240 static gboolean range_intersect(guint x1, guint x2, guint y1, guint y2)
4241 {
4242 guint tmp;
4243 if (x1 > x2) { tmp = x1; x1 = x2; x2 = tmp; }
4244 if (y1 > y2) { tmp = y1; y1 = y2; y1 = tmp; }
4245 if (y1 < x1) { tmp = x1; x1 = y1; y1 = tmp; tmp = x2; x2 = y2; y2 = tmp; }
4246 return y1 <= x2;
4247 }
4248
4249 typedef struct {
4250 int start, end;
4251 gboolean found;
4252 LineParams lp;
4253 } bdrf;
4254
4255 static gint back_display_row_fetcher(GtkSText *text,
4256 LineParams *params,
4257 bdrf *data)
4258 {
4259 if (range_intersect(data->start, data->end, params->start.index, params->end.index)) {
4260 XDEBUG( ("%s(%d) - FOUND search (%d, %d), current (%d, %d)", __FILE__, __LINE__,
4261 data->start, data->end,
4262 params->start.index, params->end.index) );
4263 data->found = TRUE;
4264 return TRUE;
4265 }
4266 else {
4267 XDEBUG( ("%s(%d) - NEXT search (%d, %d), current (%d, %d)", __FILE__, __LINE__,
4268 data->start, data->end,
4269 params->start.index, params->end.index) );
4270 data->lp = *params;
4271 return FALSE;
4272 }
4273 }
4274
4275 static void move_cursor_to_display_row_up(GtkSText *text)
4276 {
4277 LineParams lp;
4278 bdrf data = { 0 };
4279 int new_index;
4280 int col;
4281 GtkSPropertyMark mark;
4282
4283 mark = find_this_line_start_mark(text, text->cursor_mark.index, &text->cursor_mark);
4284
4285 /* top of buffer */
4286 if (mark.index == 0) {
4287 XDEBUG ( ("%s(%d) top of buffer", __FILE__, __LINE__) );
4288 }
4289
4290 /* we need previous DISPLAY row not the previous BUFFER line, so we go to start
4291 * of paragraph, and iterate over the lines until we have a LineParams that matches
4292 * the original */
4293 lp = CACHE_DATA(text->current_line);
4294 col = (text->cursor_mark.index - lp.start.index);
4295 data.start = lp.start.index;
4296 data.end = lp.end.index;
4297
4298 /* get the previous line */
4299 if (mark.index != 0) {
4300 decrement_mark(&mark);
4301 if (mark.index != 0) {
4302 GtkSPropertyMark smark = mark;
4303 XDEBUG( ("%s(%d) finding line start mark", __FILE__, __LINE__) );
4304 mark = find_this_line_start_mark(text, smark.index -1, &smark);
4305 }
4306 }
4307
4308 /* let's get the previous display line */
4309 XDEBUG( ("%s(%d) iterating to get display lines", __FILE__, __LINE__) );
4310 line_params_iterate(text, &mark, NULL, FALSE, &data,
4311 (LineIteratorFunction)back_display_row_fetcher);
4312 XDEBUG( ("%s(%d) done iterating. found = %d", __FILE__, __LINE__, data.found) );
4313
4314 if (data.found) {
4315 if (col < text->persist_column) col = text->persist_column;
4316 else text->persist_column = col;
4317 new_index = data.lp.start.index + col;
4318 XDEBUG( ("%s(%d) - new index = %d", __FILE__, __LINE__, new_index) );
4319 if (new_index > data.lp.end.index) {
4320 new_index = data.lp.end.index;
4321 }
4322 /* and move the cursor */
4323 XDEBUG( ("%s(%d) - setting index", __FILE__, __LINE__) );
4324 gtk_stext_set_position_X(GTK_EDITABLE(text), new_index);
4325 }
4326 }
4327
4328 typedef struct {
4329 gboolean found;
4330 gboolean completed;
4331 gint start, end;
4332 LineParams lp;
4333 } fdrf;
4334
4335 #if defined(AHX_DEBUG)
4336 static void print_line(GtkSText *text, guint start, guint end)
4337 {
4338 gchar *buf = alloca(2048), *walk = buf;
4339
4340 memset(buf, 0, 2048);
4341 for (; start <= end; start++) {
4342 *walk++ = GTK_STEXT_INDEX(text, start);
4343 }
4344 XDEBUG( ("%s", buf) );
4345 }
4346 #endif
4347
4348 static gint forward_display_row_fetcher(GtkSText *text,
4349 LineParams *lp,
4350 fdrf *data)
4351 {
4352 if (data->found) {
4353 XDEBUG( ("%s(%d) - FW RETURNS. search (%d, %d), current (%d, %d)",
4354 __FILE__, __LINE__, data->start, data->end, lp->start.index, lp->end.index) );
4355 data->lp = *lp;
4356 data->completed = TRUE;
4357 print_line(text, lp->start.index, lp->end.index);
4358 return TRUE;
4359 }
4360 else if (range_intersect(data->start, data->end, lp->start.index, lp->end.index)) {
4361 XDEBUG( ("%s(%d) - FW FOUND IT. search (%d, %d), current (%d, %d)",
4362 __FILE__, __LINE__, data->start, data->end, lp->start.index, lp->end.index) );
4363 data->found = TRUE;
4364 return FALSE;
4365 }
4366 else {
4367 return FALSE;
4368 }
4369 }
4370
4371 static void move_cursor_to_display_row_down (GtkSText *text)
4372 {
4373 LineParams lp;
4374 int new_index;
4375 int col;
4376 GtkSPropertyMark mark;
4377 fdrf data = { FALSE, FALSE };
4378
4379 mark = find_this_line_start_mark(text, text->cursor_mark.index, &text->cursor_mark);
4380 lp = CACHE_DATA(text->current_line);
4381 col = (text->cursor_mark.index - lp.start.index);
4382
4383 data.start = lp.start.index;
4384 data.end = lp.end.index;
4385
4386 /* find the next DISPLAY line */
4387 XDEBUG( ("%s(%d) - FW iterating", __FILE__, __LINE__) ) ;
4388 line_params_iterate(text, &mark, NULL, FALSE, &data,
4389 (LineIteratorFunction)forward_display_row_fetcher);
4390 XDEBUG( ("%s(%d) - FW done iterating", __FILE__, __LINE__) );
4391
4392 if (data.completed) {
4393 if (col < text->persist_column) col = text->persist_column;
4394 else text->persist_column = col;
4395 new_index = data.lp.start.index + col;
4396 if (new_index > data.lp.end.index) {
4397 new_index = data.lp.end.index;
4398 }
4399 /* and move the cursor */
4400 XDEBUG( ("%s(%d) - FW set pos %d", __FILE__, __LINE__, new_index) );
4401 gtk_stext_set_position_X(GTK_EDITABLE(text), new_index);
4402 }
4403 }
4404
4405 static void reset_persist_col_pos(GtkSText *text)
4406 {
4407 text->persist_column = 0;
4408 }
4409
4410 static void
4411 gtk_stext_move_cursor (GtkEditable *editable,
4412 gint x,
4413 gint y)
4414 {
4415 if (x > 0)
4416 {
4417 while (x-- != 0)
4418 move_cursor_hor (GTK_STEXT (editable), 1);
4419 }
4420 else if (x < 0)
4421 {
4422 while (x++ != 0)
4423 move_cursor_hor (GTK_STEXT (editable), -1);
4424 }
4425
4426 if (y > 0)
4427 {
4428 while (y-- != 0)
4429 move_cursor_ver (GTK_STEXT (editable), 1);
4430 }
4431 else if (y < 0)
4432 {
4433 while (y++ != 0)
4434 move_cursor_ver (GTK_STEXT (editable), -1);
4435 }
4436 }
4437
4438 static void
4439 gtk_stext_move_forward_character (GtkSText *text)
4440 {
4441 move_cursor_hor (text, 1);
4442 }
4443
4444 static void
4445 gtk_stext_move_backward_character (GtkSText *text)
4446 {
4447 move_cursor_hor (text, -1);
4448 }
4449
4450 static void
4451 gtk_stext_move_next_line (GtkSText *text)
4452 {
4453 move_cursor_ver (text, 1);
4454 }
4455
4456 static void
4457 gtk_stext_move_previous_line (GtkSText *text)
4458 {
4459 move_cursor_ver (text, -1);
4460 }
4461
4462 static void
4463 gtk_stext_move_word (GtkEditable *editable,
4464 gint n)
4465 {
4466 if (n > 0)
4467 {
4468 while (n-- != 0)
4469 gtk_stext_move_forward_word (GTK_STEXT (editable));
4470 }
4471 else if (n < 0)
4472 {
4473 while (n++ != 0)
4474 gtk_stext_move_backward_word (GTK_STEXT (editable));
4475 }
4476 }
4477
4478 static void
4479 gtk_stext_move_forward_word (GtkSText *text)
4480 {
4481 text->cursor_virtual_x = 0;
4482
4483 undraw_cursor (text, FALSE);
4484
4485 if (text->use_wchar)
4486 {
4487 while (!LAST_INDEX (text, text->cursor_mark) &&
4488 !gdk_iswalnum (GTK_STEXT_INDEX(text, text->cursor_mark.index)))
4489 advance_mark (&text->cursor_mark);
4490
4491 while (!LAST_INDEX (text, text->cursor_mark) &&
4492 gdk_iswalnum (GTK_STEXT_INDEX(text, text->cursor_mark.index)))
4493 advance_mark (&text->cursor_mark);
4494 }
4495 else
4496 {
4497 while (!LAST_INDEX (text, text->cursor_mark) &&
4498 !isalnum (GTK_STEXT_INDEX(text, text->cursor_mark.index)))
4499 advance_mark (&text->cursor_mark);
4500
4501 while (!LAST_INDEX (text, text->cursor_mark) &&
4502 isalnum (GTK_STEXT_INDEX(text, text->cursor_mark.index)))
4503 advance_mark (&text->cursor_mark);
4504 }
4505
4506 find_cursor (text, TRUE);
4507 draw_cursor (text, FALSE);
4508 }
4509
4510 static void
4511 gtk_stext_move_backward_word (GtkSText *text)
4512 {
4513 text->cursor_virtual_x = 0;
4514
4515 undraw_cursor (text, FALSE);
4516
4517 if (text->use_wchar)
4518 {
4519 while ((text->cursor_mark.index > 0) &&
4520 !gdk_iswalnum (GTK_STEXT_INDEX(text, text->cursor_mark.index-1)))
4521 decrement_mark (&text->cursor_mark);
4522
4523 while ((text->cursor_mark.index > 0) &&
4524 gdk_iswalnum (GTK_STEXT_INDEX(text, text->cursor_mark.index-1)))
4525 decrement_mark (&text->cursor_mark);
4526 }
4527 else
4528 {
4529 while ((text->cursor_mark.index > 0) &&
4530 !isalnum (GTK_STEXT_INDEX(text, text->cursor_mark.index-1)))
4531 decrement_mark (&text->cursor_mark);
4532
4533 while ((text->cursor_mark.index > 0) &&
4534 isalnum (GTK_STEXT_INDEX(text, text->cursor_mark.index-1)))
4535 decrement_mark (&text->cursor_mark);
4536 }
4537
4538 find_cursor (text, TRUE);
4539 draw_cursor (text, FALSE);
4540 }
4541
4542 static void
4543 gtk_stext_move_page (GtkEditable *editable,
4544 gint x,
4545 gint y)
4546 {
4547 if (y != 0)
4548 scroll_int (GTK_STEXT (editable),
4549 y * GTK_STEXT(editable)->vadj->page_increment);
4550 }
4551
4552 static void
4553 gtk_stext_move_to_row (GtkEditable *editable,
4554 gint row)
4555 {
4556 }
4557
4558 static void
4559 gtk_stext_move_to_column (GtkEditable *editable,
4560 gint column)
4561 {
4562 GtkSText *text;
4563
4564 text = GTK_STEXT (editable);
4565
4566 text->cursor_virtual_x = 0; /* FIXME */
4567
4568 undraw_cursor (text, FALSE);
4569
4570 /* Move to the beginning of the line */
4571 while ((text->cursor_mark.index > 0) &&
4572 (GTK_STEXT_INDEX (text, text->cursor_mark.index - 1) != LINE_DELIM))
4573 decrement_mark (&text->cursor_mark);
4574
4575 while (!LAST_INDEX (text, text->cursor_mark) &&
4576 (GTK_STEXT_INDEX (text, text->cursor_mark.index) != LINE_DELIM))
4577 {
4578 if (column > 0)
4579 column--;
4580 else if (column == 0)
4581 break;
4582
4583 advance_mark (&text->cursor_mark);
4584 }
4585
4586 find_cursor (text, TRUE);
4587 draw_cursor (text, FALSE);
4588 }
4589
4590 static void
4591 gtk_stext_move_beginning_of_line (GtkSText *text)
4592 {
4593 gtk_stext_move_to_column (GTK_EDITABLE (text), 0);
4594
4595 }
4596
4597 static void
4598 gtk_stext_move_end_of_line (GtkSText *text)
4599 {
4600 gtk_stext_move_to_column (GTK_EDITABLE (text), -1);
4601 }
4602
4603 static void
4604 gtk_stext_kill_char (GtkEditable *editable,
4605 gint direction)
4606 {
4607 GtkSText *text;
4608
4609 text = GTK_STEXT (editable);
4610
4611 if (editable->selection_start_pos != editable->selection_end_pos)
4612 gtk_editable_delete_selection (editable);
4613 else
4614 {
4615 if (direction >= 0)
4616 {
4617 if (text->point.index + 1 <= TEXT_LENGTH (text))
4618 gtk_editable_delete_text (editable, text->point.index, text->point.index + 1);
4619 }
4620 else
4621 {
4622 if (text->point.index > 0)
4623 gtk_editable_delete_text (editable, text->point.index - 1, text->point.index);
4624 }
4625 }
4626 }
4627
4628 static void
4629 gtk_stext_delete_forward_character (GtkSText *text)
4630 {
4631 gtk_stext_kill_char (GTK_EDITABLE (text), 1);
4632 }
4633
4634 static void
4635 gtk_stext_delete_backward_character (GtkSText *text)
4636 {
4637 gtk_stext_kill_char (GTK_EDITABLE (text), -1);
4638 }
4639
4640 static void
4641 gtk_stext_kill_word (GtkEditable *editable,
4642 gint direction)
4643 {
4644 if (editable->selection_start_pos != editable->selection_end_pos) {
4645 gtk_editable_delete_selection (editable);
4646 }
4647 else
4648 {
4649 gint old_pos = editable->current_pos;
4650 if (direction >= 0)
4651 {
4652 gtk_stext_move_word (editable, 1);
4653 gtk_editable_delete_text (editable, old_pos, editable->current_pos);
4654 }
4655 else
4656 {
4657 gtk_stext_move_word (editable, -1);
4658 gtk_editable_delete_text (editable, editable->current_pos, old_pos);
4659 }
4660 }
4661 }
4662
4663 static void
4664 gtk_stext_delete_forward_word (GtkSText *text)
4665 {
4666 gtk_stext_kill_word (GTK_EDITABLE (text), 1);
4667 }
4668
4669 static void
4670 gtk_stext_delete_backward_word (GtkSText *text)
4671 {
4672 gtk_stext_kill_word (GTK_EDITABLE (text), -1);
4673 }
4674
4675 static void
4676 gtk_stext_kill_line (GtkEditable *editable,
4677 gint direction)
4678 {
4679 gint old_pos = editable->current_pos;
4680 if (direction >= 0)
4681 {
4682 gtk_stext_move_to_column (editable, -1);
4683 gtk_editable_delete_text (editable, old_pos, editable->current_pos);
4684 }
4685 else
4686 {
4687 gtk_stext_move_to_column (editable, 0);
4688 gtk_editable_delete_text (editable, editable->current_pos, old_pos);
4689 }
4690 }
4691
4692 static void
4693 gtk_stext_delete_line (GtkSText *text)
4694 {
4695 gtk_stext_move_to_column (GTK_EDITABLE (text), 0);
4696 gtk_stext_kill_line (GTK_EDITABLE (text), 1);
4697 }
4698
4699 static void
4700 gtk_stext_delete_to_line_end (GtkSText *text)
4701 {
4702 gtk_stext_kill_line (GTK_EDITABLE (text), 1);
4703 }
4704
4705 static void
4706 gtk_stext_select_word (GtkSText *text, guint32 time)
4707 {
4708 gint start_pos;
4709 gint end_pos;
4710
4711 GtkEditable *editable;
4712 editable = GTK_EDITABLE (text);
4713
4714 gtk_stext_move_backward_word (text);
4715 start_pos = text->cursor_mark.index;
4716
4717 gtk_stext_move_forward_word (text);
4718 end_pos = text->cursor_mark.index;
4719
4720 editable->has_selection = TRUE;
4721 gtk_stext_set_selection (editable, start_pos, end_pos);
4722 gtk_editable_claim_selection (editable, start_pos != end_pos, time);
4723 }
4724
4725 static void
4726 gtk_stext_select_line (GtkSText *text, guint32 time)
4727 {
4728 gint start_pos;
4729 gint end_pos;
4730
4731 GtkEditable *editable;
4732 editable = GTK_EDITABLE (text);
4733
4734 gtk_stext_move_beginning_of_line (text);
4735 start_pos = text->cursor_mark.index;
4736
4737 gtk_stext_move_end_of_line (text);
4738 gtk_stext_move_forward_character (text);
4739 end_pos = text->cursor_mark.index;
4740
4741 editable->has_selection = TRUE;
4742 gtk_stext_set_selection (editable, start_pos, end_pos);
4743 gtk_editable_claim_selection (editable, start_pos != end_pos, time);
4744 }
4745
4746 /**********************************************************************/
4747 /* Scrolling */
4748 /**********************************************************************/
4749
4750 static void
4751 adjust_adj (GtkSText* text, GtkAdjustment* adj)
4752 {
4753 gint height;
4754
4755 gdk_window_get_size (text->text_area, NULL, &height);
4756
4757 adj->step_increment = MIN (adj->upper, (float) SCROLL_PIXELS);
4758 adj->page_increment = MIN (adj->upper, height - (float) KEY_SCROLL_PIXELS);
4759 adj->page_size = MIN (adj->upper, height);
4760 adj->value = MIN (adj->value, adj->upper - adj->page_size);
4761 adj->value = MAX (adj->value, 0.0);
4762
4763 gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
4764 }
4765
4766 static gint
4767 set_vertical_scroll_iterator (GtkSText* text, LineParams* lp, void* data)
4768 {
4769 SetVerticalScrollData *svdata = (SetVerticalScrollData *) data;
4770
4771 if ((text->first_line_start_index >= lp->start.index) &&
4772 (text->first_line_start_index <= lp->end.index))
4773 {
4774 svdata->mark = lp->start;
4775
4776 if (text->first_line_start_index == lp->start.index)
4777 {
4778 text->first_onscreen_ver_pixel = svdata->pixel_height + text->first_cut_pixels;
4779 }
4780 else
4781 {
4782 text->first_onscreen_ver_pixel = svdata->pixel_height;
4783 text->first_cut_pixels = 0;
4784 }
4785
4786 text->vadj->value = (float) text->first_onscreen_ver_pixel;
4787 }
4788
4789 svdata->pixel_height += LINE_HEIGHT (*lp);
4790
4791 return FALSE;
4792 }
4793
4794 static gint
4795 set_vertical_scroll_find_iterator (GtkSText* text, LineParams* lp, void* data)
4796 {
4797 SetVerticalScrollData *svdata = (SetVerticalScrollData *) data;
4798 gint return_val;
4799
4800 if (svdata->pixel_height <= (gint) text->vadj->value &&
4801 svdata->pixel_height + LINE_HEIGHT(*lp) > (gint) text->vadj->value)
4802 {
4803 svdata->mark = lp->start;
4804
4805 text->first_cut_pixels = (gint)text->vadj->value - svdata->pixel_height;
4806 text->first_onscreen_ver_pixel = svdata->pixel_height;
4807 text->first_line_start_index = lp->start.index;
4808
4809 return_val = TRUE;
4810 }
4811 else
4812 {
4813 svdata->pixel_height += LINE_HEIGHT (*lp);
4814
4815 return_val = FALSE;
4816 }
4817
4818 return return_val;
4819 }
4820
4821 static GtkSPropertyMark
4822 set_vertical_scroll (GtkSText* text)
4823 {
4824 GtkSPropertyMark mark = find_mark (text, 0);
4825 SetVerticalScrollData data;
4826 gint height;
4827 gint orig_value;
4828
4829 data.pixel_height = 0;
4830 line_params_iterate (text, &mark, NULL, FALSE, &data, set_vertical_scroll_iterator);
4831
4832 text->vadj->upper = (float) data.pixel_height;
4833 orig_value = (gint) text->vadj->value;
4834
4835 gdk_window_get_size (text->text_area, NULL, &height);
4836
4837 text->vadj->step_increment = MIN (text->vadj->upper, (float) SCROLL_PIXELS);
4838 text->vadj->page_increment = MIN (text->vadj->upper, height - (float) KEY_SCROLL_PIXELS);
4839 text->vadj->page_size = MIN (text->vadj->upper, height);
4840 text->vadj->value = MIN (text->vadj->value, text->vadj->upper - text->vadj->page_size);
4841 text->vadj->value = MAX (text->vadj->value, 0.0);
4842
4843 text->last_ver_value = (gint)text->vadj->value;
4844
4845 gtk_signal_emit_by_name (GTK_OBJECT (text->vadj), "changed");
4846
4847 if (text->vadj->value != orig_value)
4848 {
4849 /* We got clipped, and don't really know which line to put first. */
4850 data.pixel_height = 0;
4851 data.last_didnt_wrap = TRUE;
4852
4853 line_params_iterate (text, &mark, NULL,
4854 FALSE, &data,
4855 set_vertical_scroll_find_iterator);
4856 }
4857
4858 return data.mark;
4859 }
4860
4861 static void
4862 scroll_int (GtkSText* text, gint diff)
4863 {
4864 gfloat upper;
4865
4866 text->vadj->value += diff;
4867
4868 upper = text->vadj->upper - text->vadj->page_size;
4869 text->vadj->value = MIN (text->vadj->value, upper);
4870 text->vadj->value = MAX (text->vadj->value, 0.0);
4871
4872 gtk_signal_emit_by_name (GTK_OBJECT (text->vadj), "value_changed");
4873 }
4874
4875 static void
4876 process_exposes (GtkSText *text)
4877 {
4878 GdkEvent *event;
4879
4880 /* Make sure graphics expose events are processed before scrolling
4881 * again */
4882
4883 while ((event = gdk_event_get_graphics_expose (text->text_area)) != NULL)
4884 {
4885 gtk_widget_event (GTK_WIDGET (text), event);
4886 if (event->expose.count == 0)
4887 {
4888 gdk_event_free (event);
4889 break;
4890 }
4891 gdk_event_free (event);
4892 }
4893 }
4894
4895 static gint last_visible_line_height (GtkSText* text)
4896 {
4897 GList *cache = text->line_start_cache;
4898 gint height;
4899
4900 gdk_window_get_size (text->text_area, NULL, &height);
4901
4902 for (; cache->next; cache = cache->next)
4903 if (pixel_height_of(text, cache->next) > height)
4904 break;
4905
4906 if (cache)
4907 return pixel_height_of(text, cache) - 1;
4908 else
4909 return 0;
4910 }
4911
4912 static gint first_visible_line_height (GtkSText* text)
4913 {
4914 if (text->first_cut_pixels)
4915 return pixel_height_of(text, text->line_start_cache) + 1;
4916 else
4917 return 1;
4918 }
4919
4920 static void
4921 scroll_down (GtkSText* text, gint diff0)
4922 {
4923 GdkRectangle rect;
4924 gint real_diff = 0;
4925 gint width, height;
4926
4927 text->first_onscreen_ver_pixel += diff0;
4928
4929 while (diff0-- > 0)
4930 {
4931 if (text->first_cut_pixels < LINE_HEIGHT(CACHE_DATA(text->line_start_cache)) - 1)
4932 {
4933 text->first_cut_pixels += 1;
4934 }
4935 else
4936 {
4937 text->first_cut_pixels = 0;
4938
4939 text->line_start_cache = text->line_start_cache->next;
4940 g_assert (text->line_start_cache);
4941
4942 text->first_line_start_index =
4943 CACHE_DATA(text->line_start_cache).start.index;
4944
4945 if (!text->line_start_cache->next)
4946 fetch_lines_forward (text, 1);
4947 }
4948
4949 real_diff += 1;
4950 }
4951
4952 gdk_window_get_size (text->text_area, &width, &height);
4953 if (height > real_diff)
4954 gdk_draw_pixmap (text->text_area,
4955 text->gc,
4956 text->text_area,
4957 0,
4958 real_diff,
4959 0,
4960 0,
4961 width,
4962 height - real_diff);
4963
4964 rect.x = 0;
4965 rect.y = MAX (0, height - real_diff);
4966 rect.width = width;
4967 rect.height = MIN (height, real_diff);
4968
4969 expose_text (text, &rect, FALSE);
4970 gtk_stext_draw_focus ( (GtkWidget *) text);
4971
4972 if (text->current_line)
4973 {
4974 gint cursor_min;
4975
4976 text->cursor_pos_y -= real_diff;
4977 cursor_min = drawn_cursor_min(text);
4978
4979 if (cursor_min < 0)
4980 find_mouse_cursor (text, text->cursor_pos_x,
4981 first_visible_line_height (text));
4982 }
4983
4984 if (height > real_diff)
4985 process_exposes (text);
4986 }
4987
4988 static void
4989 scroll_up (GtkSText* text, gint diff0)
4990 {
4991 gint real_diff = 0;
4992 GdkRectangle rect;
4993 gint width, height;
4994
4995 text->first_onscreen_ver_pixel += diff0;
4996
4997 while (diff0++ < 0)
4998 {
4999 g_assert (text->line_start_cache);
5000
5001 if (text->first_cut_pixels > 0)
5002 {
5003 text->first_cut_pixels -= 1;
5004 }
5005 else
5006 {
5007 if (!text->line_start_cache->prev)
5008 fetch_lines_backward (text);
5009
5010 text->line_start_cache = text->line_start_cache->prev;
5011
5012 text->first_line_start_index =
5013 CACHE_DATA(text->line_start_cache).start.index;
5014
5015 text->first_cut_pixels = LINE_HEIGHT(CACHE_DATA(text->line_start_cache)) - 1;
5016 }
5017
5018 real_diff += 1;
5019 }
5020
5021 gdk_window_get_size (text->text_area, &width, &height);
5022 if (height > real_diff)
5023 gdk_draw_pixmap (text->text_area,
5024 text->gc,
5025 text->text_area,
5026 0,
5027 0,
5028 0,
5029 real_diff,
5030 width,
5031 height - real_diff);
5032
5033 rect.x = 0;
5034 rect.y = 0;
5035 rect.width = width;
5036 rect.height = MIN (height, real_diff);
5037
5038 expose_text (text, &rect, FALSE);
5039 gtk_stext_draw_focus ( (GtkWidget *) text);
5040
5041 if (text->current_line)
5042 {
5043 gint cursor_max;
5044 gint height;
5045
5046 text->cursor_pos_y += real_diff;
5047 cursor_max = drawn_cursor_max(text);
5048 gdk_window_get_size (text->text_area, NULL, &height);
5049
5050 if (cursor_max >= height)
5051 find_mouse_cursor (text, text->cursor_pos_x,
5052 last_visible_line_height (text));
5053 }
5054
5055 if (height > real_diff)
5056 process_exposes (text);
5057 }
5058
5059 /**********************************************************************/
5060 /* Display Code */
5061 /**********************************************************************/
5062
5063 /* Assumes mark starts a line. Calculates the height, width, and
5064 * displayable character count of a single DISPLAYABLE line. That
5065 * means that in line-wrap mode, this does may not compute the
5066 * properties of an entire line. */
5067 static LineParams
5068 find_line_params (GtkSText* text,
5069 const GtkSPropertyMark* mark,
5070 const PrevTabCont *tab_cont,
5071 PrevTabCont *next_cont)
5072 {
5073 LineParams lp;
5074 TabStopMark tab_mark = tab_cont->tab_start;
5075 guint max_display_pixels;
5076 GdkWChar ch;
5077 gint ch_width;
5078 GdkFont *font;
5079
5080 gdk_window_get_size (text->text_area, (gint*) &max_display_pixels, NULL);
5081
5082 if (text->wrap_rmargin) {
5083 /* SYLPHEED - since sylpheed is a mail program, assume we work with
5084 * fixed fonts. only assume we're using one font! */
5085 font = MARK_CURRENT_FONT(text, mark);
5086
5087 /* SYLPHEED - ok for multi byte charsets to check for ASCII char?
5088 */
5089 if (text->use_wchar)
5090 ch_width = gdk_char_width_wc(font, 'W');
5091 else
5092 ch_width = gdk_char_width(font, 'W');
5093
5094 /* SYLPHEED - max_display_chars has the rmargin in pixels
5095 */
5096 max_display_pixels = text->wrap_rmargin * ch_width;
5097 }
5098
5099 if (GTK_EDITABLE (text)->editable || !text->word_wrap)
5100 max_display_pixels -= LINE_WRAP_ROOM;
5101
5102 lp.wraps = 0;
5103 lp.tab_cont = *tab_cont;
5104 lp.start = *mark;
5105 lp.end = *mark;
5106 lp.pixel_width = tab_cont->pixel_offset;
5107 lp.displayable_chars = 0;
5108 lp.font_ascent = 0;
5109 lp.font_descent = 0;
5110
5111 init_tab_cont (text, next_cont);
5112
5113 while (!LAST_INDEX(text, lp.end))
5114 {
5115 g_assert (lp.end.property);
5116
5117 ch = GTK_STEXT_INDEX (text, lp.end.index);
5118 font = MARK_CURRENT_FONT (text, &lp.end);
5119
5120 if (ch == LINE_DELIM)
5121 {
5122 /* Newline doesn't count in computation of line height, even
5123 * if its in a bigger font than the rest of the line. Unless,
5124 * of course, there are no other characters. */
5125
5126 if (!lp.font_ascent && !lp.font_descent)
5127 {
5128 lp.font_ascent = font->ascent;
5129 lp.font_descent = font->descent;
5130 }
5131
5132 lp.tab_cont_next = *next_cont;
5133
5134 return lp;
5135 }
5136
5137 ch_width = find_char_width (text, &lp.end, &tab_mark);
5138
5139 if ((ch_width + lp.pixel_width > max_display_pixels) &&
5140 (lp.end.index > lp.start.index))
5141 {
5142 lp.wraps = 1;
5143
5144 if (text->line_wrap)
5145 {
5146 next_cont->tab_start = tab_mark;
5147 next_cont->pixel_offset = 0;
5148
5149 if (ch == '\t')
5150 {
5151 /* Here's the tough case, a tab is wrapping. */
5152 gint pixels_avail = max_display_pixels - lp.pixel_width;
5153 gint space_width = MARK_CURRENT_TEXT_FONT(text, &lp.end)->char_widths[' '];
5154 gint spaces_avail = pixels_avail / space_width;
5155
5156 if (spaces_avail == 0)
5157 {
5158 decrement_mark (&lp.end);
5159 }
5160 else
5161 {
5162 advance_tab_mark (text, &next_cont->tab_start, '\t');
5163 next_cont->pixel_offset = space_width * (tab_mark.to_next_tab -
5164 spaces_avail);
5165 lp.displayable_chars += 1;
5166 }
5167 }
5168 else
5169 {
5170 if (text->word_wrap)
5171 {
5172 GtkSPropertyMark saved_mark = lp.end;
5173 guint saved_characters = lp.displayable_chars;
5174
5175 lp.displayable_chars += 1;
5176
5177 if (text->use_wchar)
5178 {
5179 while (!gdk_iswspace (GTK_STEXT_INDEX (text, lp.end.index)) &&
5180 (lp.end.index > lp.start.index))
5181 {
5182 decrement_mark (&lp.end);
5183 lp.displayable_chars -= 1;
5184 }
5185 }
5186 else
5187 {
5188 while (!isspace(GTK_STEXT_INDEX (text, lp.end.index)) &&
5189 (lp.end.index > lp.start.index))
5190 {
5191 decrement_mark (&lp.end);
5192 lp.displayable_chars -= 1;
5193 }
5194 }
5195
5196 /* If whole line is one word, revert to char wrapping */
5197 if (lp.end.index == lp.start.index)
5198 {
5199 lp.end = saved_mark;
5200 lp.displayable_chars = saved_characters;
5201 decrement_mark (&lp.end);
5202 }
5203 }
5204 else
5205 {
5206 /* Don't include this character, it will wrap. */
5207 decrement_mark (&lp.end);
5208 }
5209 }
5210
5211 lp.tab_cont_next = *next_cont;
5212
5213 return lp;
5214 }
5215 }
5216 else
5217 {
5218 lp.displayable_chars += 1;
5219 }
5220
5221 lp.font_ascent = MAX (font->ascent, lp.font_ascent);
5222 lp.font_descent = MAX (font->descent, lp.font_descent);
5223 lp.pixel_width += ch_width;
5224
5225 advance_mark(&lp.end);
5226 advance_tab_mark (text, &tab_mark, ch);
5227 }
5228
5229 if (LAST_INDEX(text, lp.start))
5230 {
5231 /* Special case, empty last line. */
5232 font = MARK_CURRENT_FONT (text, &lp.end);
5233
5234 lp.font_ascent = font->ascent;
5235 lp.font_descent = font->descent;
5236 }
5237
5238 lp.tab_cont_next = *next_cont;
5239
5240 return lp;
5241 }
5242
5243 static void
5244 expand_scratch_buffer (GtkSText* text, guint len)
5245 {
5246 if (len >= text->scratch_buffer_len)
5247 {
5248 guint i = 1;
5249
5250 while (i <= len && i < MIN_GAP_SIZE) i <<= 1;
5251
5252 if (text->use_wchar)
5253 {
5254 if (!text->scratch_buffer.wc)
5255 text->scratch_buffer.wc = g_new (GdkWChar, i);
5256 else
5257 text->scratch_buffer.wc = g_realloc (text->scratch_buffer.wc,
5258 i * sizeof (GdkWChar));
5259 }
5260 else
5261 {
5262 if (!text->scratch_buffer.ch)
5263 text->scratch_buffer.ch = g_new (guchar, i);
5264 else
5265 text->scratch_buffer.ch = g_realloc (text->scratch_buffer.ch, i);
5266 }
5267
5268 text->scratch_buffer_len = i;
5269 }
5270 }
5271
5272 /* Side effect: modifies text->gc
5273 */
5274
5275 static void
5276 draw_bg_rect (GtkSText* text, GtkSPropertyMark *mark,
5277 gint x, gint y, gint width, gint height,
5278 gboolean already_cleared)
5279 {
5280 GtkEditable *editable = GTK_EDITABLE(text);
5281
5282 if ((mark->index >= MIN(editable->selection_start_pos, editable->selection_end_pos) &&
5283 mark->index < MAX(editable->selection_start_pos, editable->selection_end_pos)))
5284 {
5285 gtk_paint_flat_box(GTK_WIDGET(text)->style, text->text_area,
5286 editable->has_selection ?
5287 GTK_STATE_SELECTED : GTK_STATE_ACTIVE,
5288 GTK_SHADOW_NONE,
5289 NULL, GTK_WIDGET(text), "text",
5290 x, y, width, height);
5291 }
5292 else if (!gdk_color_equal(MARK_CURRENT_BACK (text, mark),
5293 &GTK_WIDGET(text)->style->base[GTK_WIDGET_STATE (text)]))
5294 {
5295 gdk_gc_set_foreground (text->gc, MARK_CURRENT_BACK (text, mark));
5296
5297 gdk_draw_rectangle (text->text_area,
5298 text->gc,
5299 TRUE, x, y, width, height);
5300 }
5301 else if (GTK_WIDGET (text)->style->bg_pixmap[GTK_STATE_NORMAL])
5302 {
5303 GdkRectangle rect;
5304
5305 rect.x = x;
5306 rect.y = y;
5307 rect.width = width;
5308 rect.height = height;
5309
5310 clear_area (text, &rect);
5311 }
5312 else if (!already_cleared)
5313 gdk_window_clear_area (text->text_area, x, y, width, height);
5314 }
5315
5316 static void
5317 draw_line (GtkSText* text,
5318 gint pixel_start_height,
5319 LineParams* lp)
5320 {
5321 GdkGCValues gc_values;
5322 gint i;
5323 gint len = 0;
5324 guint running_offset = lp->tab_cont.pixel_offset;
5325 union { GdkWChar *wc; guchar *ch; } buffer;
5326 GdkGC *fg_gc;
5327
5328 GtkEditable *editable = GTK_EDITABLE(text);
5329
5330 guint selection_start_pos = MIN (editable->selection_start_pos, editable->selection_end_pos);
5331 guint selection_end_pos = MAX (editable->selection_start_pos, editable->selection_end_pos);
5332
5333 GtkSPropertyMark mark = lp->start;
5334 TabStopMark tab_mark = lp->tab_cont.tab_start;
5335 gint pixel_height = pixel_start_height + lp->font_ascent;
5336 guint chars = lp->displayable_chars;
5337
5338 /* First provide a contiguous segment of memory. This makes reading
5339 * the code below *much* easier, and only incurs the cost of copying
5340 * when the line being displayed spans the gap. */
5341 if (mark.index <= text->gap_position &&
5342 mark.index + chars > text->gap_position)
5343 {
5344 expand_scratch_buffer (text, chars);
5345
5346 if (text->use_wchar)
5347 {
5348 for (i = 0; i < chars; i += 1)
5349 text->scratch_buffer.wc[i] = GTK_STEXT_INDEX(text, mark.index + i);
5350 buffer.wc = text->scratch_buffer.wc;
5351 }
5352 else
5353 {
5354 for (i = 0; i < chars; i += 1)
5355 text->scratch_buffer.ch[i] = GTK_STEXT_INDEX(text, mark.index + i);
5356 buffer.ch = text->scratch_buffer.ch;
5357 }
5358 }
5359 else
5360 {
5361 if (text->use_wchar)
5362 {
5363 if (mark.index >= text->gap_position)
5364 buffer.wc = text->text.wc + mark.index + text->gap_size;
5365 else
5366 buffer.wc = text->text.wc + mark.index;
5367 }
5368 else
5369 {
5370 if (mark.index >= text->gap_position)
5371 buffer.ch = text->text.ch + mark.index + text->gap_size;
5372 else
5373 buffer.ch = text->text.ch + mark.index;
5374 }
5375 }
5376
5377
5378 if (running_offset > 0)
5379 {
5380 draw_bg_rect (text, &mark, 0, pixel_start_height, running_offset,
5381 LINE_HEIGHT (*lp), TRUE);
5382 }
5383
5384 while (chars > 0)
5385 {
5386 len = 0;
5387 if ((text->use_wchar && buffer.wc[0] != '\t') ||
5388 (!text->use_wchar && buffer.ch[0] != '\t'))
5389 {
5390 union { GdkWChar *wc; guchar *ch; } next_tab;
5391 gint pixel_width;
5392 GdkFont *font;
5393
5394 next_tab.wc = NULL;
5395 if (text->use_wchar)
5396 for (i=0; i<chars; i++)
5397 {
5398 if (buffer.wc[i] == '\t')
5399 {
5400 next_tab.wc = buffer.wc + i;
5401 break;
5402 }
5403 }
5404 else
5405 next_tab.ch = memchr (buffer.ch, '\t', chars);
5406
5407 len = MIN (MARK_CURRENT_PROPERTY (&mark)->length - mark.offset, chars);
5408
5409 if (text->use_wchar)
5410 {
5411 if (next_tab.wc)
5412 len = MIN (len, next_tab.wc - buffer.wc);
5413 }
5414 else
5415 {
5416 if (next_tab.ch)
5417 len = MIN (len, next_tab.ch - buffer.ch);
5418 }
5419
5420 if (mark.index < selection_start_pos)
5421 len = MIN (len, selection_start_pos - mark.index);
5422 else if (mark.index < selection_end_pos)
5423 len = MIN (len, selection_end_pos - mark.index);
5424
5425 font = MARK_CURRENT_FONT (text, &mark);
5426 if (font->type == GDK_FONT_FONT)
5427 {
5428 gdk_gc_set_font (text->gc, font);
5429 gdk_gc_get_values (text->gc, &gc_values);
5430 if (text->use_wchar)
5431 pixel_width = gdk_text_width_wc (gc_values.font,
5432 buffer.wc, len);
5433 else
5434 pixel_width = gdk_text_width (gc_values.font,
5435 buffer.ch, len);
5436 }
5437 else
5438 {
5439 if (text->use_wchar)
5440 pixel_width = gdk_text_width_wc (font, buffer.wc, len);
5441 else
5442 pixel_width = gdk_text_width (font, buffer.ch, len);
5443 }
5444
5445 draw_bg_rect (text, &mark, running_offset, pixel_start_height,
5446 pixel_width, LINE_HEIGHT (*lp), TRUE);
5447
5448 if ((mark.index >= selection_start_pos) &&
5449 (mark.index < selection_end_pos))
5450 {
5451 if (editable->has_selection)
5452 fg_gc = GTK_WIDGET(text)->style->fg_gc[GTK_STATE_SELECTED];
5453 else
5454 fg_gc = GTK_WIDGET(text)->style->fg_gc[GTK_STATE_ACTIVE];
5455 }
5456 else
5457 {
5458 gdk_gc_set_foreground (text->gc, MARK_CURRENT_FORE (text, &mark));
5459 fg_gc = text->gc;
5460 }
5461
5462 if (text->use_wchar)
5463 gdk_draw_text_wc (text->text_area, MARK_CURRENT_FONT (text, &mark),
5464 fg_gc,
5465 running_offset,
5466 pixel_height,
5467 buffer.wc,
5468 len);
5469 else
5470 gdk_draw_text (text->text_area, MARK_CURRENT_FONT (text, &mark),
5471 fg_gc,
5472 running_offset,
5473 pixel_height,
5474 buffer.ch,
5475 len);
5476
5477 running_offset += pixel_width;
5478
5479 advance_tab_mark_n (text, &tab_mark, len);
5480 }
5481 else
5482 {
5483 gint pixels_remaining;
5484 gint space_width;
5485 gint spaces_avail;
5486
5487 len = 1;
5488
5489 gdk_window_get_size (text->text_area, &pixels_remaining, NULL);
5490 if (GTK_EDITABLE (text)->editable || !text->word_wrap)
5491 pixels_remaining -= (LINE_WRAP_ROOM + running_offset);
5492 else
5493 pixels_remaining -= running_offset;
5494
5495 space_width = MARK_CURRENT_TEXT_FONT(text, &mark)->char_widths[' '];
5496
5497 spaces_avail = pixels_remaining / space_width;
5498 spaces_avail = MIN (spaces_avail, tab_mark.to_next_tab);
5499
5500 draw_bg_rect (text, &mark, running_offset, pixel_start_height,
5501 spaces_avail * space_width, LINE_HEIGHT (*lp), TRUE);
5502
5503 running_offset += tab_mark.to_next_tab *
5504 MARK_CURRENT_TEXT_FONT(text, &mark)->char_widths[' '];
5505
5506 advance_tab_mark (text, &tab_mark, '\t');
5507 }
5508
5509 advance_mark_n (&mark, len);
5510 if (text->use_wchar)
5511 buffer.wc += len;
5512 else
5513 buffer.ch += len;
5514 chars -= len;
5515 }
5516 }
5517
5518 static void
5519 draw_line_wrap (GtkSText* text, guint height /* baseline height */)
5520 {
5521 gint width;
5522 GdkPixmap *bitmap;
5523 gint bitmap_width;
5524 gint bitmap_height;
5525
5526 if (!GTK_EDITABLE (text)->editable && text->word_wrap)
5527 return;
5528
5529 /* SYLPHEED - don't draw ugly word wrapping thing if
5530 * our wrap margin is set */
5531 if (text->wrap_rmargin > 0) {
5532 return;
5533 }
5534
5535 if (text->line_wrap)
5536 {
5537 bitmap = text->line_wrap_bitmap;
5538 bitmap_width = line_wrap_width;
5539 bitmap_height = line_wrap_height;
5540 }
5541 else
5542 {
5543 bitmap = text->line_arrow_bitmap;
5544 bitmap_width = line_arrow_width;
5545 bitmap_height = line_arrow_height;
5546 }
5547
5548 gdk_window_get_size (text->text_area, &width, NULL);
5549 width -= LINE_WRAP_ROOM;
5550
5551 gdk_gc_set_stipple (text->gc,
5552 bitmap);
5553
5554 gdk_gc_set_fill (text->gc, GDK_STIPPLED);
5555
5556 gdk_gc_set_foreground (text->gc, &GTK_WIDGET (text)->style->text[GTK_STATE_NORMAL]);
5557
5558 gdk_gc_set_ts_origin (text->gc,
5559 width + 1,
5560 height - bitmap_height - 1);
5561
5562 gdk_draw_rectangle (text->text_area,
5563 text->gc,
5564 TRUE,
5565 width + 1,
5566 height - bitmap_height - 1 /* one pixel above the baseline. */,
5567 bitmap_width,
5568 bitmap_height);
5569
5570 gdk_gc_set_ts_origin (text->gc, 0, 0);
5571
5572 gdk_gc_set_fill (text->gc, GDK_SOLID);
5573 }
5574
5575 static void
5576 undraw_cursor (GtkSText* text, gint absolute)
5577 {
5578 GtkEditable *editable = (GtkEditable *)text;
5579
5580 TDEBUG (("in undraw_cursor\n"));
5581
5582 if (absolute)
5583 text->cursor_drawn_level = 0;
5584
5585 if ((text->cursor_drawn_level ++ == 0) &&
5586 (editable->selection_start_pos == editable->selection_end_pos) &&
5587 GTK_WIDGET_DRAWABLE (text) && text->line_start_cache)
5588 {
5589 GdkFont* font;
5590 gint pixel_width, pixel_height;
5591 GdkGC *gc;
5592
5593 g_assert(text->cursor_mark.property);
5594
5595 gc = gdk_gc_new(text->text_area);
5596 g_assert(gc);
5597 gdk_gc_copy(gc, text->gc);
5598
5599 font = MARK_CURRENT_FONT(text, &text->cursor_mark);
5600
5601 /* SYLPHEED:
5602 * changed the cursor to a real block (TM)
5603 */
5604 if (text->cursor_type == STEXT_CURSOR_BLOCK) {
5605 if (text->use_wchar)
5606 pixel_width = gdk_char_width_wc(font, text->cursor_char);
5607 else
5608 pixel_width = gdk_char_width(font, text->cursor_char);
5609 pixel_width -= 1;
5610 pixel_height = LINE_HEIGHT(CACHE_DATA(text->current_line));
5611
5612 draw_bg_rect (text, &text->cursor_mark,
5613 text->cursor_pos_x,
5614 text->cursor_pos_y - (pixel_height + 1),
5615 pixel_width + 1,
5616 pixel_height + 1,
5617 FALSE);
5618 }
5619 else {
5620 draw_bg_rect (text, &text->cursor_mark,
5621 text->cursor_pos_x - 1,
5622 text->cursor_pos_y - text->cursor_char_offset - font->ascent,
5623 2, font->descent + font->ascent + 1, FALSE);
5624
5625 }
5626
5627 if (text->cursor_char)
5628 {
5629 if (font->type == GDK_FONT_FONT)
5630 gdk_gc_set_font (text->gc, font);
5631
5632 gdk_gc_set_foreground (text->gc, MARK_CURRENT_FORE (text, &text->cursor_mark));
5633
5634 gdk_draw_text_wc (text->text_area, font,
5635 text->gc,
5636 text->cursor_pos_x,
5637 text->cursor_pos_y - text->cursor_char_offset,
5638 &text->cursor_char,
5639 1);
5640 }
5641
5642 gdk_gc_copy(text->gc, gc);
5643 gdk_gc_unref(gc);
5644 }
5645 }
5646
5647 static gint
5648 drawn_cursor_min (GtkSText* text)
5649 {
5650 GdkFont* font;
5651
5652 g_assert(text->cursor_mark.property);
5653
5654 font = MARK_CURRENT_FONT(text, &text->cursor_mark);
5655
5656 return text->cursor_pos_y - text->cursor_char_offset - font->ascent;
5657 }
5658
5659 static gint
5660 drawn_cursor_max (GtkSText* text)
5661 {
5662 GdkFont* font;
5663
5664 g_assert(text->cursor_mark.property);
5665
5666 font = MARK_CURRENT_FONT(text, &text->cursor_mark);
5667
5668 return text->cursor_pos_y - text->cursor_char_offset;
5669 }
5670
5671 static void
5672 draw_cursor (GtkSText* text, gint absolute)
5673 {
5674 GtkEditable *editable = (GtkEditable *)text;
5675 gint pixel_width, pixel_height;
5676
5677 TDEBUG (("in draw_cursor\n"));
5678
5679 if (absolute)
5680 text->cursor_drawn_level = 1;
5681
5682 if ((--text->cursor_drawn_level == 0) &&
5683 editable->editable &&
5684 (editable->selection_start_pos == editable->selection_end_pos) &&
5685 GTK_WIDGET_DRAWABLE (text) && text->line_start_cache)
5686 {
5687 GdkFont* font;
5688 GdkGC* gc;
5689
5690 g_assert (text->cursor_mark.property);
5691
5692 gc = gdk_gc_new(text->text_area);
5693 g_assert (gc);
5694 gdk_gc_copy(gc, text->gc);
5695 font = MARK_CURRENT_FONT (text, &text->cursor_mark);
5696 if (text->cursor_type == STEXT_CURSOR_BLOCK) {
5697 /* SYLPHEED:
5698 * changed the cursor to a real block (TM)
5699 */
5700 if (text->use_wchar) {
5701 pixel_width = gdk_char_width_wc(font, text->cursor_char);
5702 }
5703 else {
5704 pixel_width = gdk_char_width(font, text->cursor_char);
5705 }
5706 pixel_width -= 1;
5707
5708 pixel_height = LINE_HEIGHT(CACHE_DATA(text->current_line));
5709 gdk_gc_set_foreground (text->gc, &GTK_WIDGET (text)->style->text[GTK_STATE_NORMAL]);
5710 gdk_gc_set_function(text->gc, GDK_INVERT);
5711 gdk_draw_rectangle(text->text_area, text->gc, TRUE,
5712 text->cursor_pos_x,
5713 text->cursor_pos_y - pixel_height,
5714 pixel_width,
5715 pixel_height);
5716 }
5717 else {
5718 gdk_gc_set_line_attributes(text->gc, 2, GDK_LINE_SOLID, GDK_CAP_NOT_LAST, GDK_JOIN_MITER);
5719 gdk_gc_set_foreground(text->gc, &GTK_WIDGET (text)->style->text[GTK_STATE_NORMAL]);
5720 gdk_draw_line(text->text_area, text->gc, text->cursor_pos_x,
5721 text->cursor_pos_y + font->descent - text->cursor_char_offset,
5722 text->cursor_pos_x,
5723 text->cursor_pos_y - text->cursor_char_offset - font->ascent );
5724
5725 }
5726 gdk_gc_copy(text->gc, gc);
5727 gdk_gc_unref(gc);
5728 }
5729 }
5730
5731 static GdkGC *
5732 create_bg_gc (GtkSText *text)
5733 {
5734 GdkGCValues values;
5735
5736 values.tile = GTK_WIDGET (text)->style->bg_pixmap[GTK_STATE_NORMAL];
5737 values.fill = GDK_TILED;
5738
5739 return gdk_gc_new_with_values (text->text_area, &values,
5740 GDK_GC_FILL | GDK_GC_TILE);
5741 }
5742
5743 static void
5744 clear_area (GtkSText *text, GdkRectangle *area)
5745 {
5746 GtkWidget *widget = GTK_WIDGET (text);
5747
5748 if (text->bg_gc)
5749 {
5750 gint width, height;
5751
5752 gdk_window_get_size (widget->style->bg_pixmap[GTK_STATE_NORMAL], &width, &height);
5753
5754 gdk_gc_set_ts_origin (text->bg_gc,
5755 (- (gint)text->first_onscreen_hor_pixel) % width,
5756 (- (gint)text->first_onscreen_ver_pixel) % height);
5757
5758 gdk_draw_rectangle (text->text_area, text->bg_gc, TRUE,
5759 area->x, area->y, area->width, area->height);
5760 }
5761 else
5762 gdk_window_clear_area (text->text_area, area->x, area->y, area->width, area->height);
5763 }
5764
5765 static void
5766 expose_text (GtkSText* text, GdkRectangle *area, gboolean cursor)
5767 {
5768 GList *cache = text->line_start_cache;
5769 gint pixels = - text->first_cut_pixels;
5770 gint min_y = MAX (0, area->y);
5771 gint max_y = MAX (0, area->y + area->height);
5772 gint height;
5773
5774 gdk_window_get_size (text->text_area, NULL, &height);
5775 max_y = MIN (max_y, height);
5776
5777 TDEBUG (("in expose x=%d y=%d w=%d h=%d\n", area->x, area->y, area->width, area->height));
5778
5779 clear_area (text, area);
5780
5781 for (; pixels < height; cache = cache->next)
5782 {
5783 if (pixels < max_y && (pixels + (gint)LINE_HEIGHT(CACHE_DATA(cache))) >= min_y)
5784 {
5785 draw_line (text, pixels, &CACHE_DATA(cache));
5786
5787 if (CACHE_DATA(cache).wraps)
5788 draw_line_wrap (text, pixels + CACHE_DATA(cache).font_ascent);
5789 }
5790
5791 if (cursor && GTK_WIDGET_HAS_FOCUS (text))
5792 {
5793 if (CACHE_DATA(cache).start.index <= text->cursor_mark.index &&
5794 CACHE_DATA(cache).end.index >= text->cursor_mark.index)
5795 {
5796 /* We undraw and draw the cursor here to get the drawn
5797 * level right ... FIXME - maybe the second parameter
5798 * of draw_cursor should work differently
5799 */
5800 undraw_cursor (text, FALSE);
5801 draw_cursor (text, FALSE);
5802 }
5803 }
5804
5805 pixels += LINE_HEIGHT(CACHE_DATA(cache));
5806
5807 if (!cache->next)
5808 {
5809 fetch_lines_forward (text, 1);
5810
5811 if (!cache->next)
5812 break;
5813 }
5814 }
5815 }
5816
5817 static void
5818 gtk_stext_update_text (GtkEditable *editable,
5819 gint start_pos,
5820 gint end_pos)
5821 {
5822 GtkSText *text = GTK_STEXT (editable);
5823
5824 GList *cache = text->line_start_cache;
5825 gint pixels = - text->first_cut_pixels;
5826 GdkRectangle area;
5827 gint width;
5828 gint height;
5829
5830 if (end_pos < 0)
5831 end_pos = TEXT_LENGTH (text);
5832
5833 if (end_pos < start_pos)
5834 return;
5835
5836 gdk_window_get_size (text->text_area, &width, &height);
5837 area.x = 0;
5838 area.y = -1;
5839 area.width = width;
5840 area.height = 0;
5841
5842 TDEBUG (("in expose span start=%d stop=%d\n", start_pos, end_pos));
5843
5844 for (; pixels < height; cache = cache->next)
5845 {
5846 if (CACHE_DATA(cache).start.index < end_pos)
5847 {
5848 if (CACHE_DATA(cache).end.index >= start_pos)
5849 {
5850 if (area.y < 0)
5851 area.y = MAX(0,pixels);
5852 area.height = pixels + LINE_HEIGHT(CACHE_DATA(cache)) - area.y;
5853 }
5854 }
5855 else
5856 break;
5857
5858 pixels += LINE_HEIGHT(CACHE_DATA(cache));
5859
5860 if (!cache->next)
5861 {
5862 fetch_lines_forward (text, 1);
5863
5864 if (!cache->next)
5865 break;
5866 }
5867 }
5868
5869 if (area.y >= 0)
5870 expose_text (text, &area, TRUE);
5871 }
5872
5873 static void
5874 recompute_geometry (GtkSText* text)
5875 {
5876 GtkSPropertyMark mark, start_mark;
5877 GList *new_lines;
5878 gint height;
5879 gint width;
5880
5881 free_cache (text);
5882
5883 mark = start_mark = set_vertical_scroll (text);
5884
5885 /* We need a real start of a line when calling fetch_lines().
5886 * not the start of a wrapped line.
5887 */
5888 while (mark.index > 0 &&
5889 GTK_STEXT_INDEX (text, mark.index - 1) != LINE_DELIM)
5890 decrement_mark (&mark);
5891
5892 gdk_window_get_size (text->text_area, &width, &height);
5893
5894 /* Fetch an entire line, to make sure that we get all the text
5895 * we backed over above, in addition to enough text to fill up
5896 * the space vertically
5897 */
5898
5899 new_lines = fetch_lines (text,
5900 &mark,
5901 NULL,
5902 FetchLinesCount,
5903 1);
5904
5905 mark = CACHE_DATA (g_list_last (new_lines)).end;
5906 if (!LAST_INDEX (text, mark))
5907 {
5908 advance_mark (&mark);
5909
5910 new_lines = g_list_concat (new_lines,
5911 fetch_lines (text,
5912 &mark,
5913 NULL,
5914 FetchLinesPixels,
5915 height + text->first_cut_pixels));
5916 }
5917
5918 /* Now work forward to the actual first onscreen line */
5919
5920 while (CACHE_DATA (new_lines).start.index < start_mark.index)
5921 new_lines = new_lines->next;
5922
5923 text->line_start_cache = new_lines;
5924
5925 find_cursor (text, TRUE);
5926 }
5927
5928 /**********************************************************************/
5929 /* Selection */
5930 /**********************************************************************/
5931
5932 static void
5933 gtk_stext_set_selection (GtkEditable *editable,
5934 gint start,
5935 gint end)
5936 {
5937 GtkSText *text = GTK_STEXT (editable);
5938
5939 guint start1, end1, start2, end2;
5940
5941 if (end < 0)
5942 end = TEXT_LENGTH (text);
5943
5944 start1 = MIN(start,end);
5945 end1 = MAX(start,end);
5946 start2 = MIN(editable->selection_start_pos, editable->selection_end_pos);
5947 end2 = MAX(editable->selection_start_pos, editable->selection_end_pos);
5948
5949 if (start2 < start1)
5950 {
5951 guint tmp;
5952
5953 tmp = start1; start1 = start2; start2 = tmp;
5954 tmp = end1; end1 = end2; end2 = tmp;
5955 }
5956
5957 undraw_cursor (text, FALSE);
5958 editable->selection_start_pos = start;
5959 editable->selection_end_pos = end;
5960 draw_cursor (text, FALSE);
5961
5962 /* Expose only what changed */
5963
5964 if (start1 < start2)
5965 gtk_stext_update_text (editable, start1, MIN(end1, start2));
5966
5967 if (end2 > end1)
5968 gtk_stext_update_text (editable, MAX(end1, start2), end2);
5969 else if (end2 < end1)
5970 gtk_stext_update_text (editable, end2, end1);
5971 }
5972
5973
5974 /* SYLPHEED:
5975 * cursor timer
5976 */
5977
5978 static gint stext_blink_timer_proc(GtkSText *text)
5979 {
5980 if (text->cursor_state_on) {
5981 text->cursor_state_on = FALSE;
5982 undraw_cursor(text, TRUE);
5983 /* kill this timer... */
5984 gtk_timeout_remove(text->cursor_timer_id);
5985 text->cursor_timer_id = gtk_timeout_add(text->cursor_off_ms, (GtkFunction) stext_blink_timer_proc, (gpointer) text);
5986 }
5987 else {
5988 text->cursor_state_on = TRUE;
5989 draw_cursor(text, TRUE);
5990 /* kill this timer... */
5991 gtk_timeout_remove(text->cursor_timer_id);
5992 text->cursor_timer_id = gtk_timeout_add(text->cursor_on_ms, (GtkFunction) stext_blink_timer_proc, (gpointer) text);
5993 }
5994 return TRUE;
5995 }
5996
5997 static gint stext_idle_timer_proc(GtkSText *text)
5998 {
5999 /* make sure the cursor timer is off */
6000 if (text->cursor_timer_id) {
6001 gtk_timeout_remove(text->cursor_timer_id);
6002 text->cursor_timer_id = 0;
6003 }
6004 /* assuming it's always on when calling this function ... */
6005 text->cursor_state_on = TRUE;
6006 text->cursor_timer_id = gtk_timeout_add(text->cursor_on_ms, (GtkFunction) stext_blink_timer_proc, (gpointer) text);
6007 /* make sure we kill the timer (could perhaps make this function return FALSE (not documented in
6008 * the current docs). should check the source. */
6009 gtk_idle_remove( text->cursor_idle_time_timer_id );
6010 text->cursor_idle_time_timer_id = 0;
6011 return TRUE;
6012 }
6013
6014 static void gtk_stext_enable_blink (GtkSText *text)
6015 {
6016 if (text->cursor_timer_on) {
6017 gtk_stext_disable_blink(text);
6018 text->cursor_idle_time_timer_id = gtk_idle_add((GtkFunction) stext_idle_timer_proc, (gpointer) text);
6019 }
6020 }
6021
6022 static void gtk_stext_disable_blink (GtkSText *text)
6023 {
6024 if (text->cursor_timer_on) {
6025 if (text->cursor_idle_time_timer_id) {
6026 gtk_idle_remove( text->cursor_idle_time_timer_id );
6027 text->cursor_idle_time_timer_id = 0;
6028 }
6029 if (text->cursor_timer_id) {
6030 gtk_timeout_remove( text->cursor_timer_id );
6031 text->cursor_timer_id = 0;
6032 }
6033 draw_cursor(text, TRUE);
6034 }
6035 }
6036
6037 void gtk_stext_set_blink(GtkSText *text, gboolean blinkin_on)
6038 {
6039 if (text->cursor_timer_on != blinkin_on) {
6040 if (text->cursor_timer_on) {
6041 /* text widget already created? */
6042 if (text->cursor_visible) {
6043 gtk_stext_disable_blink(text);
6044 }
6045 text->cursor_timer_on = FALSE;
6046 }
6047 else {
6048 if (text->cursor_visible) {
6049 gtk_stext_enable_blink(text);
6050 }
6051 text->cursor_timer_on = TRUE;
6052 }
6053 }
6054 }
6055
6056
6057 void gtk_stext_set_wrap_rmargin (GtkSText *text, gint rmargin)
6058 {
6059 /* not particularly impressive, but it does the job. */
6060 /* TODO: currently only allowed to set this after a
6061 * gtk_stext_new() */
6062 text->wrap_rmargin = rmargin >= 0 ? rmargin : 0;
6063 }
6064
6065 /**********************************************************************/
6066 /* Debug */
6067 /**********************************************************************/
6068
6069 #ifdef DEBUG_GTK_STEXT
6070 static void
6071 gtk_stext_show_cache_line (GtkSText *text, GList *cache,
6072 const char* what, const char* func, gint line)
6073 {
6074 LineParams *lp = &CACHE_DATA(cache);
6075 gint i;
6076
6077 if (cache == text->line_start_cache)
6078 g_message ("Line Start Cache: ");
6079
6080 if (cache == text->current_line)
6081 g_message("Current Line: ");
6082
6083 g_message ("%s:%d: cache line %s s=%d,e=%d,lh=%d (",
6084 func,
6085 line,
6086 what,
6087 lp->start.index,
6088 lp->end.index,
6089 LINE_HEIGHT(*lp));
6090
6091 for (i = lp->start.index; i < (lp->end.index + lp->wraps); i += 1)
6092 g_message ("%c", GTK_STEXT_INDEX (text, i));
6093
6094 g_message (")\n");
6095 }
6096
6097 static void
6098 gtk_stext_show_cache (GtkSText *text, const char* func, gint line)
6099 {
6100 GList *l = text->line_start_cache;
6101
6102 if (!l) {
6103 return;
6104 }
6105
6106 /* back up to the absolute beginning of the line cache */
6107 while (l->prev)
6108 l = l->prev;
6109
6110 g_message ("*** line cache ***\n");
6111 for (; l; l = l->next)
6112 gtk_stext_show_cache_line (text, l, "all", func, line);
6113 }
6114
6115 static void
6116 gtk_stext_assert_mark (GtkSText *text,
6117 GtkSPropertyMark *mark,
6118 GtkSPropertyMark *before,
6119 GtkSPropertyMark *after,
6120 const gchar *msg,
6121 const gchar *where,
6122 gint line)
6123 {
6124 GtkSPropertyMark correct_mark = find_mark (text, mark->index);
6125
6126 if (mark->offset != correct_mark.offset ||
6127 mark->property != correct_mark.property)
6128 g_warning ("incorrect %s text property marker in %s:%d, index %d -- bad!", where, msg, line, mark->index);
6129 }
6130
6131 static void
6132 gtk_stext_assert (GtkSText *text,
6133 const gchar *msg,
6134 gint line)
6135 {
6136 GList* cache = text->line_start_cache;
6137 GtkSPropertyMark* before_mark = NULL;
6138 GtkSPropertyMark* after_mark = NULL;
6139
6140 gtk_stext_show_props (text, msg, line);
6141
6142 for (; cache->prev; cache = cache->prev)
6143 /* nothing */;
6144
6145 g_message ("*** line markers ***\n");
6146
6147 for (; cache; cache = cache->next)
6148 {
6149 after_mark = &CACHE_DATA(cache).end;
6150 gtk_stext_assert_mark (text, &CACHE_DATA(cache).start, before_mark, after_mark, msg, "start", line);
6151 before_mark = &CACHE_DATA(cache).start;
6152
6153 if (cache->next)
6154 after_mark = &CACHE_DATA(cache->next).start;
6155 else
6156 after_mark = NULL;
6157
6158 gtk_stext_assert_mark (text, &CACHE_DATA(cache).end, before_mark, after_mark, msg, "end", line);
6159 before_mark = &CACHE_DATA(cache).end;
6160 }
6161 }
6162
6163 static void
6164 gtk_stext_show_adj (GtkSText *text,
6165 GtkAdjustment *adj,
6166 const char* what,
6167 const char* func,
6168 gint line)
6169 {
6170 g_message ("*** adjustment ***\n");
6171
6172 g_message ("%s:%d: %s adjustment l=%.1f u=%.1f v=%.1f si=%.1f pi=%.1f ps=%.1f\n",
6173 func,
6174 line,
6175 what,
6176 adj->lower,
6177 adj->upper,
6178 adj->value,
6179 adj->step_increment,
6180 adj->page_increment,
6181 adj->page_size);
6182 }
6183
6184 static void
6185 gtk_stext_show_props (GtkSText *text,
6186 const char* msg,
6187 int line)
6188 {
6189 GList* props = text->text_properties;
6190 int proplen = 0;
6191
6192 g_message ("%s:%d: ", msg, line);
6193
6194 for (; props; props = props->next)
6195 {
6196 TextProperty *p = (TextProperty*)props->data;
6197
6198 proplen += p->length;
6199
6200 g_message ("[%d,%p,", p->length, p);
6201 if (p->flags & PROPERTY_FONT)
6202 g_message ("%p,", p->font);
6203 else
6204 g_message ("-,");
6205 if (p->flags & PROPERTY_FOREGROUND)
6206 g_message ("%ld, ", p->fore_color.pixel);
6207 else
6208 g_message ("-,");
6209 if (p->flags & PROPERTY_BACKGROUND)
6210 g_message ("%ld] ", p->back_color.pixel);
6211 else
6212 g_message ("-] ");
6213 }
6214
6215 g_message ("\n");
6216
6217 if (proplen - 1 != TEXT_LENGTH(text))
6218 g_warning ("incorrect property list length in %s:%d -- bad!", msg, line);
6219 }
6220 #endif