1 /* editor text drawing.
3 Copyright (C) 1996, 1997, 1998, 2001, 2002, 2003, 2004, 2005, 2006,
4 2007 Free Software Foundation, Inc.
6 Authors: 1996, 1997 Paul Sheer
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 * \brief Source: editor text drawing
34 #include <sys/types.h>
41 #include "../src/global.h"
43 #include "edit-impl.h"
44 #include "edit-widget.h"
46 #define MAX_LINE_LEN 1024
48 #include "../src/tty/tty.h" /* tty_printf() */
49 #include "../src/skin/skin.h"
50 #include "../src/tty/key.h" /* is_idle() */
52 #include "../src/widget.h" /* buttonbar_redraw() */
53 #include "../src/charsets.h"
54 #include "../src/strutil.h" /* utf string functions */
55 #include "../src/main.h" /* source_codepage */
58 #define MOD_ABNORMAL (1 << 8)
59 #define MOD_BOLD (1 << 9)
60 #define MOD_MARKED (1 << 10)
61 #define MOD_CURSOR (1 << 11)
62 #define MOD_WHITESPACE (1 << 12)
64 #define FONT_OFFSET_X 0
65 #define FONT_OFFSET_Y 0
67 #define FONT_PIX_PER_LINE 1
68 #define FONT_MEAN_WIDTH 1
70 /* Toggles statusbar draw style */
71 int simple_statusbar
= 0;
74 status_string (WEdit
* edit
, char *s
, int w
)
77 unsigned char cur_byte
= 0;
78 unsigned int cur_utf
= 0;
82 * If we are at the end of file, print <EOF>,
83 * otherwise print the current character as is (if printable),
84 * as decimal and as hex.
86 if (edit
->curs1
< edit
->last_byte
) {
88 cur_byte
= edit_get_byte (edit
, edit
->curs1
);
90 g_snprintf (byte_str
, sizeof (byte_str
), "%4d 0x%03X",
94 cur_utf
= edit_get_utf (edit
, edit
->curs1
, &cw
);
96 g_snprintf (byte_str
, sizeof (byte_str
), "%04d 0x%03X",
100 cur_utf
= edit_get_byte (edit
, edit
->curs1
);
101 g_snprintf (byte_str
, sizeof (byte_str
), "%04d 0x%03X",
108 strcpy (byte_str
, "<EOF> ");
111 /* The field lengths just prevent the status line from shortening too much */
112 if (simple_statusbar
)
114 "%c%c%c%c %3ld %5ld/%ld %6ld/%ld %s %s",
115 edit
->mark1
!= edit
->mark2
? ( column_highlighting
? 'C' : 'B') : '-',
116 edit
->modified
? 'M' : '-',
117 edit
->macro_i
< 0 ? '-' : 'R',
118 edit
->overwrite
== 0 ? '-' : 'O',
119 edit
->curs_col
+ edit
->over_col
,
122 edit
->total_lines
+ 1,
129 source_codepage
>= 0 ? get_codepage_id (source_codepage
) : ""
136 "[%c%c%c%c] %2ld L:[%3ld+%2ld %3ld/%3ld] *(%-4ld/%4ldb) %s %s",
137 edit
->mark1
!= edit
->mark2
? ( column_highlighting
? 'C' : 'B') : '-',
138 edit
->modified
? 'M' : '-',
139 edit
->macro_i
< 0 ? '-' : 'R',
140 edit
->overwrite
== 0 ? '-' : 'O',
141 edit
->curs_col
+ edit
->over_col
,
143 edit
->start_line
+ 1,
146 edit
->total_lines
+ 1,
153 source_codepage
>= 0 ? get_codepage_id (source_codepage
) : ""
161 printwstr (const char *s
, int len
)
164 tty_printf ("%-*.*s", len
, len
, s
);
167 /* Draw the status line at the top of the widget. The size of the filename
168 * field varies depending on the width of the screen and the length of
171 edit_status (WEdit
*edit
)
173 const int w
= edit
->widget
.cols
;
174 const size_t status_size
= w
+ 1;
175 char * const status
= g_malloc (status_size
);
177 const char *fname
= "";
179 const int gap
= 3; /* between the filename and the status */
180 const int right_gap
= 5; /* at the right end of the screen */
181 const int preferred_fname_len
= 16;
183 status_string (edit
, status
, status_size
);
184 status_len
= (int) str_term_width1 (status
);
187 fname
= edit
->filename
;
188 fname_len
= str_term_width1 (fname
);
189 if (fname_len
< preferred_fname_len
)
190 fname_len
= preferred_fname_len
;
192 if (fname_len
+ gap
+ status_len
+ right_gap
>= w
) {
193 if (preferred_fname_len
+ gap
+ status_len
+ right_gap
>= w
)
194 fname_len
= preferred_fname_len
;
196 fname_len
= w
- (gap
+ status_len
+ right_gap
);
197 fname
= str_trunc (fname
, fname_len
);
200 widget_move (edit
, 0, 0);
201 tty_setcolor (SELECTED_COLOR
);
202 printwstr (fname
, fname_len
+ gap
);
203 printwstr (status
, w
- (fname_len
+ gap
));
205 if (simple_statusbar
&& edit
->widget
.cols
> 30) {
207 if (edit
->total_lines
+ 1 != 0)
208 percent
= (edit
->curs_line
+ 1) * 100 / (edit
->total_lines
+ 1);
211 widget_move (edit
, 0, edit
->widget
.cols
- 5);
212 tty_printf (" %3d%%", percent
);
214 tty_setcolor (EDITOR_NORMAL_COLOR
);
219 /* this scrolls the text so that cursor is on the screen */
220 void edit_scroll_screen_over_cursor (WEdit
* edit
)
224 int b_extreme
, t_extreme
, l_extreme
, r_extreme
;
226 if (edit
->num_widget_lines
<= 0 || edit
->num_widget_columns
<= 0)
229 edit
->num_widget_columns
-= EDIT_TEXT_HORIZONTAL_OFFSET
+ option_line_state_width
;
230 edit
->num_widget_lines
-= EDIT_TEXT_VERTICAL_OFFSET
- 1;
232 r_extreme
= EDIT_RIGHT_EXTREME
;
233 l_extreme
= EDIT_LEFT_EXTREME
;
234 b_extreme
= EDIT_BOTTOM_EXTREME
;
235 t_extreme
= EDIT_TOP_EXTREME
;
236 if (edit
->found_len
) {
237 b_extreme
= max (edit
->num_widget_lines
/ 4, b_extreme
);
238 t_extreme
= max (edit
->num_widget_lines
/ 4, t_extreme
);
240 if (b_extreme
+ t_extreme
+ 1 > edit
->num_widget_lines
) {
242 n
= b_extreme
+ t_extreme
;
243 b_extreme
= (b_extreme
* (edit
->num_widget_lines
- 1)) / n
;
244 t_extreme
= (t_extreme
* (edit
->num_widget_lines
- 1)) / n
;
246 if (l_extreme
+ r_extreme
+ 1 > edit
->num_widget_columns
) {
248 n
= l_extreme
+ t_extreme
;
249 l_extreme
= (l_extreme
* (edit
->num_widget_columns
- 1)) / n
;
250 r_extreme
= (r_extreme
* (edit
->num_widget_columns
- 1)) / n
;
252 p
= edit_get_col (edit
) + edit
->over_col
;
253 edit_update_curs_row (edit
);
254 outby
= p
+ edit
->start_col
- edit
->num_widget_columns
+ 1 + (r_extreme
+ edit
->found_len
);
256 edit_scroll_right (edit
, outby
);
257 outby
= l_extreme
- p
- edit
->start_col
;
259 edit_scroll_left (edit
, outby
);
261 outby
= p
- edit
->num_widget_lines
+ 1 + b_extreme
;
263 edit_scroll_downward (edit
, outby
);
264 outby
= t_extreme
- p
;
266 edit_scroll_upward (edit
, outby
);
267 edit_update_curs_row (edit
);
269 edit
->num_widget_lines
+= EDIT_TEXT_VERTICAL_OFFSET
- 1;
270 edit
->num_widget_columns
+= EDIT_TEXT_HORIZONTAL_OFFSET
+ option_line_state_width
;
273 #define edit_move(x,y) widget_move(edit, y, x);
281 print_to_widget (WEdit
*edit
, long row
, int start_col
, int start_col_real
,
282 long end_col
, struct line_s line
[], char *status
)
286 int x
= start_col_real
;
287 int x1
= start_col
+ EDIT_TEXT_HORIZONTAL_OFFSET
+ option_line_state_width
;
288 int y
= row
+ EDIT_TEXT_VERTICAL_OFFSET
;
289 int cols_to_skip
= abs (x
);
291 tty_setcolor (EDITOR_NORMAL_COLOR
);
292 tty_draw_hline (edit
->widget
.y
+ y
, edit
->widget
.x
+ x1
,
293 ' ', end_col
+ 1 - start_col
);
295 if (option_line_state
) {
297 for (i
= 0; i
< LINE_STATE_WIDTH
; i
++)
298 if (status
[i
] == '\0')
301 tty_setcolor (LINE_STATE_COLOR
);
302 edit_move (x1
+ FONT_OFFSET_X
- option_line_state_width
, y
+ FONT_OFFSET_Y
);
303 tty_print_string (status
);
306 edit_move (x1
+ FONT_OFFSET_X
, y
+ FONT_OFFSET_Y
);
311 unsigned int textchar
;
320 style
= p
->style
& 0xFF00;
322 color
= p
->style
>> 16;
324 if (style
& MOD_ABNORMAL
) {
325 /* Non-printable - use black background */
329 if (style
& MOD_WHITESPACE
) {
330 if (style
& MOD_MARKED
) {
332 tty_setcolor (EDITOR_MARKED_COLOR
);
335 if (color
!= EDITOR_NORMAL_COLOR
) {
337 tty_lowlevel_setcolor (color
);
340 tty_setcolor (EDITOR_WHITESPACE_COLOR
);
343 if (style
& MOD_BOLD
) {
344 tty_setcolor (EDITOR_BOLD_COLOR
);
345 } else if (style
& MOD_MARKED
) {
346 tty_setcolor (EDITOR_MARKED_COLOR
);
348 tty_lowlevel_setcolor (color
);
351 tty_print_anychar (textchar
);
356 int visible_tabs
= 1, visible_tws
= 1;
358 /* b is a pointer to the beginning of the line */
360 edit_draw_this_line (WEdit
*edit
, long b
, long row
, long start_col
,
363 struct line_s line
[MAX_LINE_LEN
];
364 struct line_s
*p
= line
;
366 long m1
= 0, m2
= 0, q
, c1
, c2
;
367 int col
, start_col_real
;
373 unsigned int cur_line
= 0;
375 char line_stat
[LINE_STATE_WIDTH
+ 1];
377 if (row
> edit
->num_widget_lines
- EDIT_TEXT_VERTICAL_OFFSET
) {
380 if (book_mark_query_color(edit
, edit
->start_line
+ row
, BOOK_MARK_COLOR
)) {
381 book_mark
= BOOK_MARK_COLOR
;
382 } else if (book_mark_query_color(edit
, edit
->start_line
+ row
, BOOK_MARK_FOUND_COLOR
)) {
383 book_mark
= BOOK_MARK_FOUND_COLOR
;
387 abn_style
= book_mark
<< 16;
389 abn_style
= MOD_ABNORMAL
;
391 end_col
-= EDIT_TEXT_HORIZONTAL_OFFSET
+ option_line_state_width
;
393 edit_get_syntax_color (edit
, b
- 1, &color
);
394 q
= edit_move_forward3 (edit
, b
, start_col
- edit
->start_col
, 0);
395 start_col_real
= (col
=
396 (int) edit_move_forward3 (edit
, b
, 0,
397 q
)) + edit
->start_col
;
398 if ( option_line_state
) {
399 cur_line
= edit
->start_line
+ row
;
400 if ( cur_line
<= (unsigned int) edit
->total_lines
) {
401 g_snprintf (line_stat
, LINE_STATE_WIDTH
+ 1, "%7i ", cur_line
+ 1);
403 memset(line_stat
, ' ', LINE_STATE_WIDTH
);
404 line_stat
[LINE_STATE_WIDTH
] = '\0';
406 if (book_mark_query_color (edit
, cur_line
, BOOK_MARK_COLOR
)){
407 g_snprintf (line_stat
, 2, "*");
411 if (col
+ 16 > -edit
->start_col
) {
412 eval_marks (edit
, &m1
, &m2
);
414 if (row
<= edit
->total_lines
- edit
->start_line
) {
416 if (tty_use_colors () && visible_tws
) {
417 tws
= edit_eol (edit
, b
);
418 while (tws
> b
&& ((c
= edit_get_byte (edit
, tws
- 1)) == ' '
423 while (col
<= end_col
- edit
->start_col
) {
428 if (q
== edit
->curs1
)
429 p
->style
|= MOD_CURSOR
;
430 if (q
>= m1
&& q
< m2
) {
431 if (column_highlighting
) {
433 x
= edit_move_forward3 (edit
, b
, 0, q
);
434 c1
= min (edit
->column1
, edit
->column2
);
435 c2
= max (edit
->column1
, edit
->column2
);
436 if (x
>= c1
&& x
< c2
)
437 p
->style
|= MOD_MARKED
;
439 p
->style
|= MOD_MARKED
;
441 if (q
== edit
->bracket
)
442 p
->style
|= MOD_BOLD
;
443 if (q
>= edit
->found_start
444 && q
< edit
->found_start
+ edit
->found_len
)
445 p
->style
|= MOD_BOLD
;
448 c
= edit_get_byte (edit
, q
);
450 c
= edit_get_utf (edit
, q
, &cw
);
452 /* we don't use bg for mc - fg contains both */
454 p
->style
|= book_mark
<< 16;
456 edit_get_syntax_color (edit
, q
, &color
);
457 p
->style
|= color
<< 16;
461 col
= (end_col
+ utf8lag
) - edit
->start_col
+ 1; /* quit */
464 i
= TAB_SIZE
- ((int) col
% TAB_SIZE
);
466 if (tty_use_colors() &&
467 ((visible_tabs
|| (visible_tws
&& q
>= tws
)) && enable_show_tabs_tws
)) {
468 if (p
->style
& MOD_MARKED
)
471 c
|= book_mark
<< 16;
473 c
= p
->style
| MOD_WHITESPACE
;
498 } else if (tty_use_colors() && visible_tws
&& q
>= tws
&& enable_show_tabs_tws
) {
500 p
->style
|= MOD_WHITESPACE
;
501 c
= p
->style
& ~MOD_CURSOR
;
510 c
= p
->style
& ~MOD_CURSOR
;
520 if (tty_use_colors() && visible_tws
&& q
>= tws
&& enable_show_tabs_tws
) {
522 p
->style
|= MOD_WHITESPACE
;
530 if ( utf8_display
) {
532 c
= convert_from_8bit_to_utf_c ((unsigned char) c
, edit
->converter
);
534 } else if ( edit
->utf8
)
535 c
= convert_from_utf_to_current_c (c
, edit
->converter
);
538 c
= convert_to_display_c (c
);
540 /* Caret notation for control characters */
543 p
->style
= abn_style
;
546 p
->style
= abn_style
;
553 p
->style
= abn_style
;
556 p
->style
= abn_style
;
562 if ( ( utf8_display
&& g_unichar_isprint (c
) ) ||
563 ( !utf8_display
&& is_printable (c
) ) ) {
568 p
->style
= abn_style
;
572 if ( g_unichar_isprint (c
) ) {
577 p
->style
= abn_style
;
592 start_col_real
= start_col
= 0;
597 print_to_widget (edit
, row
, start_col
, start_col_real
, end_col
, line
, line_stat
);
600 #define key_pending(x) (!is_idle())
603 edit_draw_this_char (WEdit
* edit
, long curs
, long row
)
605 int b
= edit_bol (edit
, curs
);
606 edit_draw_this_line (edit
, b
, row
, 0, edit
->num_widget_columns
- 1);
609 /* cursor must be in screen for other than REDRAW_PAGE passed in force */
611 render_edit_text (WEdit
* edit
, long start_row
, long start_column
, long end_row
,
614 long row
= 0, curs_row
;
615 static long prev_curs_row
= 0;
616 static long prev_curs
= 0;
618 int force
= edit
->force
;
622 * If the position of the page has not moved then we can draw the cursor
623 * character only. This will prevent line flicker when using arrow keys.
625 if ((!(force
& REDRAW_CHAR_ONLY
)) || (force
& REDRAW_PAGE
)) {
626 if (!(force
& REDRAW_IN_BOUNDS
)) { /* !REDRAW_IN_BOUNDS means to ignore bounds and redraw whole rows */
628 end_row
= edit
->num_widget_lines
- 1;
630 end_column
= edit
->num_widget_columns
- 1;
632 if (force
& REDRAW_PAGE
) {
634 b
= edit_move_forward (edit
, edit
->start_display
, start_row
, 0);
635 while (row
<= end_row
) {
636 if (key_pending (edit
))
638 edit_draw_this_line (edit
, b
, row
, start_column
, end_column
);
639 b
= edit_move_forward (edit
, b
, 1, 0);
643 curs_row
= edit
->curs_row
;
645 if (force
& REDRAW_BEFORE_CURSOR
) {
646 if (start_row
< curs_row
) {
647 long upto
= curs_row
- 1 <= end_row
? curs_row
- 1 : end_row
;
649 b
= edit
->start_display
;
650 while (row
<= upto
) {
651 if (key_pending (edit
))
653 edit_draw_this_line (edit
, b
, row
, start_column
, end_column
);
654 b
= edit_move_forward (edit
, b
, 1, 0);
658 /* if (force & REDRAW_LINE) ---> default */
659 b
= edit_bol (edit
, edit
->curs1
);
660 if (curs_row
>= start_row
&& curs_row
<= end_row
) {
661 if (key_pending (edit
))
663 edit_draw_this_line (edit
, b
, curs_row
, start_column
, end_column
);
665 if (force
& REDRAW_AFTER_CURSOR
) {
666 if (end_row
> curs_row
) {
667 row
= curs_row
+ 1 < start_row
? start_row
: curs_row
+ 1;
668 b
= edit_move_forward (edit
, b
, 1, 0);
669 while (row
<= end_row
) {
670 if (key_pending (edit
))
672 edit_draw_this_line (edit
, b
, row
, start_column
, end_column
);
673 b
= edit_move_forward (edit
, b
, 1, 0);
678 if (force
& REDRAW_LINE_ABOVE
&& curs_row
>= 1) {
680 b
= edit_move_backward (edit
, edit_bol (edit
, edit
->curs1
), 1);
681 if (row
>= start_row
&& row
<= end_row
) {
682 if (key_pending (edit
))
684 edit_draw_this_line (edit
, b
, row
, start_column
, end_column
);
687 if (force
& REDRAW_LINE_BELOW
&& row
< edit
->num_widget_lines
- 1) {
689 b
= edit_bol (edit
, edit
->curs1
);
690 b
= edit_move_forward (edit
, b
, 1, 0);
691 if (row
>= start_row
&& row
<= end_row
) {
692 if (key_pending (edit
))
694 edit_draw_this_line (edit
, b
, row
, start_column
, end_column
);
699 if (prev_curs_row
< edit
->curs_row
) { /* with the new text highlighting, we must draw from the top down */
700 edit_draw_this_char (edit
, prev_curs
, prev_curs_row
);
701 edit_draw_this_char (edit
, edit
->curs1
, edit
->curs_row
);
703 edit_draw_this_char (edit
, edit
->curs1
, edit
->curs_row
);
704 edit_draw_this_char (edit
, prev_curs
, prev_curs_row
);
710 prev_curs_row
= edit
->curs_row
;
711 prev_curs
= edit
->curs1
;
714 edit
->screen_modified
= 0;
718 edit_render (WEdit
* edit
, int page
, int row_start
, int col_start
, int row_end
, int col_end
)
720 if (page
) /* if it was an expose event, 'page' would be set */
721 edit
->force
|= REDRAW_PAGE
| REDRAW_IN_BOUNDS
;
723 if (edit
->force
& REDRAW_COMPLETELY
)
724 buttonbar_redraw (find_buttonbar (edit
->widget
.parent
));
725 render_edit_text (edit
, row_start
, col_start
, row_end
, col_end
);
727 * edit->force != 0 means a key was pending and the redraw
728 * was halted, so next time we must redraw everything in case stuff
729 * was left undrawn from a previous key press.
732 edit
->force
|= REDRAW_PAGE
;
735 void edit_render_keypress (WEdit
* edit
)
737 edit_render (edit
, 0, 0, 0, 0, 0);