gtk/gtkviscreen.c

   1 #include <stdio.h>
   2 #include <string.h>
   3
   4 #include <gtk/gtkmain.h>
   5 #include <gtk/gtksignal.h>
   6 #include "gtkviscreen.h"
   7 #include <gdk/gdkx.h>
   8
   9 #define INTISUCS(c)     ((c & ~0x7F) && !(((c) >> 16) & 0x7F))
  10 #define INTUCS(c)       (c)
  11 #ifdef USE_WIDECHAR
  12 #define CHAR_WIDTH(sp, ch)  wcwidth(ch)
  13 #else
  14 #define CHAR_WIDTH(sp, ch)  1
  15 #endif
  16
  17 void * v_strset __P((CHAR_T *s, CHAR_T c, size_t n));
  18
  19 #define DEFAULT_VI_SCREEN_WIDTH_CHARS     80
  20 #define DEFAULT_VI_SCREEN_HEIGHT_LINES    25
  21 #define VI_SCREEN_BORDER_ROOM         1
  22
  23 enum {
  24   ARG_0,
  25   ARG_VADJUSTMENT,
  26 };
  27
  28 enum {
  29     RESIZED,
  30     LAST_SIGNAL
  31 };
  32
  33 static void gtk_vi_screen_class_init     (GtkViScreenClass   *klass);
  34 static void gtk_vi_screen_set_arg        (GtkObject      *object,
  35                                           GtkArg         *arg,
  36                                           guint           arg_id);
  37 static void gtk_vi_screen_get_arg        (GtkObject      *object,
  38                                           GtkArg         *arg,
  39                                           guint           arg_id);
  40 static void gtk_vi_screen_init           (GtkViScreen        *vi);
  41 static void gtk_vi_screen_destroy        (GtkObject      *object);
  42 static void gtk_vi_screen_realize        (GtkWidget      *widget);
  43 /*
  44 static void gtk_vi_screen_map (GtkWidget *widget);
  45 static void gtk_vi_screen_unmap (GtkWidget *widget);
  46 */
  47 static void gtk_vi_screen_size_request   (GtkWidget      *widget,
  48                                       GtkRequisition *requisition);
  49 static void gtk_vi_screen_size_allocate  (GtkWidget      *widget,
  50                                       GtkAllocation  *allocation);
  51 /*
  52 static void gtk_vi_screen_adjustment     (GtkAdjustment  *adjustment,
  53                                       GtkViScreen        *text);
  54 */
  55
  56 static gint gtk_vi_screen_expose            (GtkWidget         *widget,
  57                                          GdkEventExpose    *event);
  58
  59 static void recompute_geometry (GtkViScreen* vi);
  60 static void expose_text (GtkViScreen* vi, GdkRectangle *area, gboolean cursor);
  61 static void draw_lines(GtkViScreen *vi, gint y, gint x, gint ymax, gint xmax);
  62 static void mark_lines(GtkViScreen *vi, gint ymin, gint xmin, gint ymax, gint xmax);
  63
  64 static GtkWidgetClass *parent_class = NULL;
  65 static guint vi_screen_signals[LAST_SIGNAL] = { 0 };
  66
  67 static GdkFont *gb_font;
  68 static GdkFont *tfn;
  69 static GdkFont *tfw;
  70
  71 #define CharAt(scr,y,x) scr->chars + (y) * scr->cols + x
  72 #define FlagAt(scr,y,x) (scr->reverse + (y) * scr->cols + x)
  73 #define ColAt(scr,y,x)  (scr->endcol + (y) * scr->cols + x)
  74
  75 #define COLOR_STANDARD      0x00
  76 #define COLOR_STANDOUT      0x01
  77
  78 /* XXX */
  79 enum { SA_ALTERNATE, SA_INVERSE };
  80
  81 void
  82 gtk_vi_screen_attribute(GtkViScreen *vi, gint attribute, gint on)
  83 {
  84     switch (attribute) {
  85     case SA_INVERSE:
  86         vi->color = on ? COLOR_STANDOUT : COLOR_STANDARD;
  87         break;
  88     }
  89 }
  90
  91 /* col is screen column */
  92 void
  93 gtk_vi_screen_move(GtkViScreen *vi, gint row, gint col)
  94 {
  95     gint x;
  96     guchar *endcol;
  97
  98     endcol = vi->endcol + row*vi->cols;
  99     for (x = 0; col > endcol[x]; ++x);
 100     vi->curx = x;
 101     vi->cury = row;
 102 }
 103
 104 static void
 105 cleartoel (GtkViScreen *vi, guint row, guint col)
 106 {
 107     CHAR_T *p, *e;
 108
 109     if (MEMCMP(p = CharAt(vi,row,col), e = CharAt(vi,vi->rows,0),
 110                 vi->cols - col)) {
 111         MEMMOVE(p, e, vi->cols - col);
 112         memset(FlagAt(vi,row,col), COLOR_STANDARD, vi->cols - col);
 113         mark_lines(vi, row, col, row+1, vi->cols);
 114     }
 115 }
 116
 117 void
 118 gtk_vi_screen_clrtoel (GtkViScreen *vi)
 119 {
 120     cleartoel(vi, vi->cury, vi->curx);
 121 }
 122
 123 void
 124 gtk_vi_screen_addstr(GtkViScreen *vi, const char *str, int len)
 125 {
 126     CHAR_T *p, *end;
 127     CHAR_T *line;
 128     guchar *endcol;
 129     gint col, startcol;
 130     gint x;
 131
 132     line = vi->chars + vi->cury*vi->cols;
 133     endcol = vi->endcol + vi->cury*vi->cols;
 134     x = vi->curx;
 135     startcol = x ? endcol[x-1] : -1;
 136     for (p = CharAt(vi,vi->cury,vi->curx), end = p + len, col = startcol;
 137                  p < end; ++x) {
 138         *p++ = *str++;
 139         endcol[x] = ++col;
 140     }
 141     memset(FlagAt(vi,vi->cury,vi->curx), vi->color, len);
 142
 143     mark_lines(vi, vi->cury, startcol+1, vi->cury+1, endcol[x-1]+1);
 144
 145     if (endcol[x-1] >= vi->cols) {
 146         if (++vi->cury >= vi->rows) {
 147             vi->cury = vi->rows-1;
 148             vi->curx = x-1;
 149         } else {
 150             vi->curx = 0;
 151         }
 152     } else vi->curx += len;
 153     if (x < vi->cols) endcol[x] = vi->cols;
 154 }
 155
 156 void
 157 gtk_vi_screen_waddstr(GtkViScreen *vi, const CHAR_T *str, int len)
 158 {
 159     CHAR_T *p, *end;
 160     CHAR_T *line;
 161     guchar *endcol;
 162     gint col, startcol;
 163     gint x;
 164
 165     MEMMOVE(CharAt(vi,vi->cury,vi->curx),str,len);
 166     memset(FlagAt(vi,vi->cury,vi->curx), vi->color, len);
 167
 168     line = vi->chars + vi->cury*vi->cols;
 169     endcol = vi->endcol + vi->cury*vi->cols;
 170     x = vi->curx;
 171     startcol = x ? endcol[x-1] : -1;
 172     for (col = startcol; x < vi->curx + len; ++x)
 173         endcol[x] = col += CHAR_WIDTH(NULL, *(line+x));
 174
 175     mark_lines(vi, vi->cury, startcol+1, vi->cury+1, endcol[x-1]+1);
 176
 177     if (endcol[x-1] >= vi->cols) {
 178         if (++vi->cury >= vi->rows) {
 179             vi->cury = vi->rows-1;
 180             vi->curx = x-1;
 181         } else {
 182             vi->curx = 0;
 183         }
 184     } else vi->curx += len;
 185     if (x < vi->cols) endcol[x] = vi->cols;
 186 }
 187
 188 void
 189 gtk_vi_screen_deleteln(GtkViScreen *vi)
 190 {
 191     gint y = vi->cury;
 192     gint rows = vi->rows - (y+1);
 193
 194     MEMMOVE(CharAt(vi,y,0), CharAt(vi,y+1,0), rows * vi->cols);
 195     cleartoel(vi,vi->rows-1,0);
 196     memmove(FlagAt(vi,y,0), FlagAt(vi,y+1,0), rows * vi->cols);
 197     memmove(ColAt(vi,y,0), ColAt(vi,y+1,0), rows * vi->cols);
 198     mark_lines(vi, y, 0, vi->rows-1, vi->cols);
 199 }
 200
 201 void
 202 gtk_vi_screen_insertln(GtkViScreen *vi)
 203 {
 204     gint y = vi->cury;
 205     gint rows = vi->rows - (y+1);
 206
 207     MEMMOVE(CharAt(vi,y+1,0), CharAt(vi,y,0), rows * vi->cols);
 208     cleartoel(vi,y,0);
 209     memmove(FlagAt(vi,y+1,0), FlagAt(vi,y,0), rows * vi->cols);
 210     memmove(ColAt(vi,y+1,0), ColAt(vi,y,0), rows * vi->cols);
 211     mark_lines(vi, y+1, 0, vi->rows, vi->cols);
 212 }
 213
 214 void
 215 gtk_vi_screen_refresh(GtkViScreen *vi)
 216 {
 217     if (vi->lastx != vi->curx || vi->lasty != vi-> cury) {
 218         mark_lines(vi, vi->lasty,
 219                 vi->lastx ? *ColAt(vi,vi->lasty,vi->lastx-1) + 1 : 0,
 220                 vi->lasty+1, *ColAt(vi,vi->lasty,vi->lastx)+1);
 221         mark_lines(vi, vi->cury,
 222                 vi->curx ? *ColAt(vi,vi->cury,vi->curx-1) + 1 : 0,
 223                 vi->cury+1, *ColAt(vi,vi->cury,vi->curx)+1);
 224     }
 225     if (vi->marked_maxy == 0)
 226         return;
 227     draw_lines(vi, vi->marked_y, vi->marked_x, vi->marked_maxy, vi->marked_maxx);
 228     vi->marked_x = vi->cols;
 229     vi->marked_y = vi->rows;
 230     vi->marked_maxx = 0;
 231     vi->marked_maxy = 0;
 232     vi->lastx = vi->curx;
 233     vi->lasty = vi->cury;
 234 }
 235
 236 void
 237 gtk_vi_screen_rewrite(GtkViScreen *vi, gint row)
 238 {
 239     memset(FlagAt(vi,row,0), COLOR_STANDARD, vi->cols);
 240     mark_lines(vi, row, 0, row+1, vi->cols);
 241 }
 242
 243 GtkType
 244 gtk_vi_screen_get_type (void)
 245 {
 246   static GtkType vi_screen_type = 0;
 247
 248   if (!vi_screen_type)
 249     {
 250       static const GtkTypeInfo vi_screen_info =
 251       {
 252         "GtkViScreen",
 253         sizeof (GtkViScreen),
 254         sizeof (GtkViScreenClass),
 255         (GtkClassInitFunc) gtk_vi_screen_class_init,
 256         (GtkObjectInitFunc) gtk_vi_screen_init,
 257         /* reserved_1 */ NULL,
 258         /* reserved_2 */ NULL,
 259         (GtkClassInitFunc) NULL,
 260       };
 261
 262       vi_screen_type = gtk_type_unique (GTK_TYPE_WIDGET, &vi_screen_info);
 263     }
 264
 265   return vi_screen_type;
 266 }
 267
 268 static void
 269 gtk_vi_screen_class_init (GtkViScreenClass *class)
 270 {
 271   GtkObjectClass *object_class;
 272   GtkWidgetClass *widget_class;
 273
 274   object_class = (GtkObjectClass*) class;
 275   widget_class = (GtkWidgetClass*) class;
 276   parent_class = gtk_type_class (GTK_TYPE_WIDGET);
 277
 278   vi_screen_signals[RESIZED] =
 279     gtk_signal_new ("resized",
 280                     GTK_RUN_FIRST,
 281                     GTK_CLASS_TYPE(object_class),
 282                     GTK_SIGNAL_OFFSET (GtkViScreenClass, resized),
 283                     gtk_marshal_NONE__INT_INT,
 284                     GTK_TYPE_NONE, 2, GTK_TYPE_INT, GTK_TYPE_INT, 0);
 285
 286   gtk_object_add_arg_type ("GtkViScreen::vadjustment",
 287                            GTK_TYPE_ADJUSTMENT,
 288                            GTK_ARG_READWRITE | GTK_ARG_CONSTRUCT,
 289                            ARG_VADJUSTMENT);
 290
 291   object_class->set_arg = gtk_vi_screen_set_arg;
 292   object_class->get_arg = gtk_vi_screen_get_arg;
 293   object_class->destroy = gtk_vi_screen_destroy;
 294
 295   widget_class->realize = gtk_vi_screen_realize;
 296   /*
 297   widget_class->map = gtk_vi_screen_map;
 298   widget_class->unmap = gtk_vi_screen_unmap;
 299   */
 300   widget_class->size_request = gtk_vi_screen_size_request;
 301   widget_class->size_allocate = gtk_vi_screen_size_allocate;
 302   widget_class->expose_event = gtk_vi_screen_expose;
 303
 304   class->rename = NULL;
 305   class->resized = NULL;
 306
 307   gb_font = gdk_font_load ("-*-*-*-*-*-*-16-*-*-*-*-*-gb2312.1980-*");
 308   /*
 309   tf = gdk_font_load ("-misc-fixed-*-*-*-*-16-*-*-*-*-*-iso10646-*");
 310   */
 311   tfn = gdk_font_load ("-misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-iso10646");
 312   tfw = gdk_font_load ("-Misc-Fixed-Medium-R-*-*-13-120-75-75-C-120-ISO10646-1");
 313 }
 314
 315 static void
 316 gtk_vi_screen_set_arg (GtkObject        *object,
 317                       GtkArg           *arg,
 318                       guint             arg_id)
 319 {
 320   GtkViScreen *vi_screen;
 321
 322   vi_screen = GTK_VI_SCREEN (object);
 323
 324   switch (arg_id)
 325     {
 326     case ARG_VADJUSTMENT:
 327       gtk_vi_screen_set_adjustment (vi_screen, GTK_VALUE_POINTER (*arg));
 328       break;
 329     default:
 330       break;
 331     }
 332 }
 333
 334 static void
 335 gtk_vi_screen_get_arg (GtkObject        *object,
 336                       GtkArg           *arg,
 337                       guint             arg_id)
 338 {
 339   GtkViScreen *vi_screen;
 340
 341   vi_screen = GTK_VI_SCREEN (object);
 342
 343   switch (arg_id)
 344     {
 345     case ARG_VADJUSTMENT:
 346       GTK_VALUE_POINTER (*arg) = vi_screen->vadj;
 347       break;
 348     default:
 349       arg->type = GTK_TYPE_INVALID;
 350       break;
 351     }
 352 }
 353
 354 static void
 355 gtk_vi_screen_init (GtkViScreen *vi)
 356 {
 357   GtkStyle *style;
 358
 359   GTK_WIDGET_SET_FLAGS (vi, GTK_CAN_FOCUS);
 360
 361   vi->text_area = NULL;
 362   vi->chars = 0;
 363   vi->reverse = 0;
 364   vi->cols = 0;
 365   vi->color = COLOR_STANDARD;
 366   vi->cols = 0;
 367   vi->rows = 0;
 368
 369   vi->conx = NULL;
 370
 371   style = gtk_style_copy(GTK_WIDGET(vi)->style);
 372   gdk_font_unref(style->font);
 373   style->font = gdk_font_load("-*-fixed-*-*-*-*-16-*-*-*-*-*-iso8859-*");
 374   GTK_WIDGET(vi)->style = style;
 375 }
 376
 377 static void
 378 gtk_vi_screen_destroy (GtkObject *object)
 379 {
 380   GtkViScreen *vi_screen;
 381
 382   g_return_if_fail (object != NULL);
 383   g_return_if_fail (GTK_IS_VI_SCREEN (object));
 384
 385   vi_screen = (GtkViScreen*) object;
 386
 387   /*
 388   gtk_signal_disconnect_by_data (GTK_OBJECT (vi_screen->vadj), vi_screen);
 389   */
 390
 391   GTK_OBJECT_CLASS(parent_class)->destroy (object);
 392 }
 393
 394 GtkWidget*
 395 gtk_vi_screen_new (GtkAdjustment *vadj)
 396 {
 397   GtkWidget *vi;
 398
 399   vi = gtk_widget_new (GTK_TYPE_VI_SCREEN,
 400                          "vadjustment", vadj,
 401                          NULL);
 402
 403
 404   return vi;
 405 }
 406
 407 void
 408 gtk_vi_screen_set_adjustment (GtkViScreen       *vi_screen,
 409                           GtkAdjustment *vadj)
 410 {
 411   g_return_if_fail (vi_screen != NULL);
 412   g_return_if_fail (GTK_IS_VI_SCREEN (vi_screen));
 413   if (vadj)
 414     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
 415   else
 416     vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 1.0, 0.0, 1.0, 0.0, 0.0));
 417
 418   if (vi_screen->vadj && (vi_screen->vadj != vadj))
 419     {
 420       gtk_signal_disconnect_by_data (GTK_OBJECT (vi_screen->vadj), vi_screen);
 421       gtk_object_unref (GTK_OBJECT (vi_screen->vadj));
 422     }
 423
 424   if (vi_screen->vadj != vadj)
 425     {
 426       vi_screen->vadj = vadj;
 427       gtk_object_ref (GTK_OBJECT (vi_screen->vadj));
 428       gtk_object_sink (GTK_OBJECT (vi_screen->vadj));
 429
 430       /*
 431       gtk_signal_connect (GTK_OBJECT (vi_screen->vadj), "changed",
 432                           (GtkSignalFunc) gtk_vi_screen_adjustment,
 433                           vi_screen);
 434       gtk_signal_connect (GTK_OBJECT (vi_screen->vadj), "value_changed",
 435                           (GtkSignalFunc) gtk_vi_screen_adjustment,
 436                           vi_screen);
 437       gtk_signal_connect (GTK_OBJECT (vi_screen->vadj), "disconnect",
 438                           (GtkSignalFunc) gtk_vi_screen_disconnect,
 439                           vi_screen);
 440       gtk_vi_screen_adjustment (vadj, vi_screen);
 441       */
 442     }
 443 }
 444
 445 static void
 446 gtk_vi_screen_realize (GtkWidget *widget)
 447 {
 448   GtkViScreen *vi;
 449   GdkWindowAttr attributes;
 450   gint attributes_mask;
 451
 452   g_return_if_fail (widget != NULL);
 453   g_return_if_fail (GTK_IS_VI_SCREEN (widget));
 454
 455   vi = GTK_VI_SCREEN (widget);
 456   GTK_WIDGET_SET_FLAGS (vi, GTK_REALIZED);
 457
 458   attributes.window_type = GDK_WINDOW_CHILD;
 459   attributes.x = widget->allocation.x;
 460   attributes.y = widget->allocation.y;
 461   attributes.width = widget->allocation.width;
 462   attributes.height = widget->allocation.height;
 463   attributes.wclass = GDK_INPUT_OUTPUT;
 464   attributes.visual = gtk_widget_get_visual (widget);
 465   attributes.colormap = gtk_widget_get_colormap (widget);
 466   attributes.event_mask = gtk_widget_get_events (widget);
 467   attributes.event_mask |= (GDK_EXPOSURE_MASK |
 468                             GDK_BUTTON_PRESS_MASK |
 469                             GDK_BUTTON_RELEASE_MASK |
 470                             GDK_BUTTON_MOTION_MASK |
 471                             GDK_ENTER_NOTIFY_MASK |
 472                             GDK_LEAVE_NOTIFY_MASK |
 473                             GDK_KEY_PRESS_MASK);
 474   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 475
 476   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 477   gdk_window_set_user_data (widget->window, vi);
 478
 479   attributes.x = (widget->style->xthickness + VI_SCREEN_BORDER_ROOM);
 480   attributes.y = (widget->style->ythickness + VI_SCREEN_BORDER_ROOM);
 481   attributes.width = MAX (1, (gint)widget->allocation.width - (gint)attributes.x * 2);
 482   attributes.height = MAX (1, (gint)widget->allocation.height - (gint)attributes.y * 2);
 483
 484   vi->text_area = gdk_window_new (widget->window, &attributes, attributes_mask);
 485   gdk_window_set_user_data (vi->text_area, vi);
 486
 487   widget->style = gtk_style_attach (widget->style, widget->window);
 488
 489   /* Can't call gtk_style_set_background here because it's handled specially */
 490   gdk_window_set_background (widget->window, &widget->style->base[GTK_STATE_NORMAL]);
 491   gdk_window_set_background (vi->text_area, &widget->style->base[GTK_STATE_NORMAL]);
 492
 493   vi->gc = gdk_gc_new (vi->text_area);
 494   /* What's this ? */
 495   gdk_gc_set_exposures (vi->gc, TRUE);
 496   gdk_gc_set_foreground (vi->gc, &widget->style->text[GTK_STATE_NORMAL]);
 497
 498   vi->reverse_gc = gdk_gc_new (vi->text_area);
 499   gdk_gc_set_foreground (vi->reverse_gc, &widget->style->base[GTK_STATE_NORMAL]);
 500
 501   gdk_window_show (vi->text_area);
 502
 503   recompute_geometry (vi);
 504 }
 505
 506 static void
 507 gtk_vi_screen_size_request (GtkWidget      *widget,
 508                        GtkRequisition *requisition)
 509 {
 510   gint xthickness;
 511   gint ythickness;
 512   gint char_height;
 513   gint char_width;
 514   GtkViScreen *vi;
 515
 516   g_return_if_fail (widget != NULL);
 517   g_return_if_fail (GTK_IS_VI_SCREEN (widget));
 518   g_return_if_fail (requisition != NULL);
 519
 520   vi = GTK_VI_SCREEN (widget);
 521
 522   xthickness = widget->style->xthickness + VI_SCREEN_BORDER_ROOM;
 523   ythickness = widget->style->ythickness + VI_SCREEN_BORDER_ROOM;
 524
 525   vi->ch_ascent = widget->style->font->ascent;
 526   vi->ch_height = (widget->style->font->ascent + widget->style->font->descent) + 1;
 527   vi->ch_width = gdk_text_width (widget->style->font, "A", 1);
 528   char_height = DEFAULT_VI_SCREEN_HEIGHT_LINES * vi->ch_height;
 529   char_width = DEFAULT_VI_SCREEN_WIDTH_CHARS * vi->ch_width;
 530
 531   requisition->width  = char_width  + xthickness * 2;
 532   requisition->height = char_height + ythickness * 2;
 533 }
 534
 535 static void
 536 gtk_vi_screen_size_allocate (GtkWidget     *widget,
 537                         GtkAllocation *allocation)
 538 {
 539   GtkViScreen *vi;
 540
 541   g_return_if_fail (widget != NULL);
 542   g_return_if_fail (GTK_IS_VI_SCREEN (widget));
 543   g_return_if_fail (allocation != NULL);
 544
 545   vi = GTK_VI_SCREEN (widget);
 546
 547   widget->allocation = *allocation;
 548   if (GTK_WIDGET_REALIZED (widget))
 549     {
 550       gdk_window_move_resize (widget->window,
 551                               allocation->x, allocation->y,
 552                               allocation->width, allocation->height);
 553
 554       gdk_window_move_resize (vi->text_area,
 555                               widget->style->xthickness + VI_SCREEN_BORDER_ROOM,
 556                               widget->style->ythickness + VI_SCREEN_BORDER_ROOM,
 557                               MAX (1, (gint)widget->allocation.width - (gint)(widget->style->xthickness +
 558                                                           (gint)VI_SCREEN_BORDER_ROOM) * 2),
 559                               MAX (1, (gint)widget->allocation.height - (gint)(widget->style->ythickness +
 560                                                            (gint)VI_SCREEN_BORDER_ROOM) * 2));
 561
 562       recompute_geometry (vi);
 563     }
 564 }
 565
 566 /*
 567 static void
 568 gtk_vi_screen_adjustment (GtkAdjustment *adjustment,
 569                          GtkViScreen       *vi_screen)
 570 {
 571   g_return_if_fail (adjustment != NULL);
 572   g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
 573   g_return_if_fail (vi_screen != NULL);
 574   g_return_if_fail (GTK_IS_VI_SCREEN (vi_screen));
 575
 576 }
 577 */
 578
 579 static gint
 580 gtk_vi_screen_expose (GtkWidget      *widget,
 581                  GdkEventExpose *event)
 582 {
 583   g_return_val_if_fail (widget != NULL, FALSE);
 584   g_return_val_if_fail (GTK_IS_VI_SCREEN (widget), FALSE);
 585   g_return_val_if_fail (event != NULL, FALSE);
 586
 587   if (event->window == GTK_VI_SCREEN (widget)->text_area)
 588     {
 589       expose_text (GTK_VI_SCREEN (widget), &event->area, TRUE);
 590     }
 591
 592   return FALSE;
 593 }
 594
 595 static void
 596 recompute_geometry (GtkViScreen* vi)
 597 {
 598     //gint xthickness;
 599     //gint ythickness;
 600     gint height;
 601     gint width;
 602     gint rows, cols;
 603     gint i;
 604
 605     //xthickness = widget->style->xthickness + VI_SCREEN_BORDER_ROOM;
 606     //ythickness = widget->style->ythickness + VI_SCREEN_BORDER_ROOM;
 607
 608     gdk_window_get_size (vi->text_area, &width, &height);
 609
 610     rows = height / vi->ch_height;
 611     cols = width / vi->ch_width;
 612
 613     if (rows == vi->rows && cols == vi->cols)
 614         return;
 615
 616     vi->marked_x = vi->cols = cols;
 617     vi->marked_y = vi->rows = rows;
 618     vi->marked_maxx = 0;
 619     vi->marked_maxy = 0;
 620
 621     g_free(vi->chars);
 622     vi->chars = (CHAR_T*)g_new(gchar, (vi->rows+1)*vi->cols * sizeof(CHAR_T));
 623     STRSET(vi->chars, ' ', (vi->rows+1)*vi->cols);
 624     g_free(vi->endcol);
 625     vi->endcol = g_new(guchar, vi->rows*vi->cols);
 626     g_free(vi->reverse);
 627     vi->reverse = g_new(guchar, vi->rows*vi->cols);
 628     memset(vi->reverse, 0, vi->rows*vi->cols);
 629
 630     gtk_signal_emit(GTK_OBJECT(vi), vi_screen_signals[RESIZED], vi->rows, vi->cols);
 631 }
 632
 633 static void
 634 expose_text (GtkViScreen* vi, GdkRectangle *area, gboolean cursor)
 635 {
 636     gint ymax;
 637     gint xmax, xmin;
 638
 639     gdk_window_clear_area (vi->text_area, area->x, area->y,
 640                             area->width, area->height);
 641     ymax = MIN((area->y + area->height + vi->ch_height - 1) / vi->ch_height,
 642                 vi->rows);
 643     xmin = area->x / vi->ch_width;
 644     xmax = MIN((area->x + area->width + vi->ch_width - 1) / vi->ch_width,
 645                 vi->cols);
 646     draw_lines(vi, area->y / vi->ch_height, xmin, ymax, xmax);
 647 }
 648
 649 #define Inverse(screen,y,x) \
 650     ((*FlagAt(screen,y,x) == COLOR_STANDOUT) ^ \
 651         (screen->cury == y && screen->curx == x))
 652
 653 static void
 654 draw_lines(GtkViScreen *vi, gint ymin, gint xmin, gint ymax, gint xmax)
 655 {
 656     gint y, x, len, blen, xpos;
 657     CHAR_T *line;
 658     GdkGC *fg, *bg;
 659     GdkFont *font;
 660     gchar buf[2];
 661     gchar *p;
 662     gboolean pango;
 663
 664     for (y = ymin, line = vi->chars + y*vi->cols;
 665                              y < ymax; ++y, line += vi->cols) {
 666         for (x = 0, xpos = 0; xpos <= xmin; ++x)
 667             xpos += CHAR_WIDTH(NULL, *(line+x));
 668         --x;
 669         xpos -= CHAR_WIDTH(NULL, *(line+x));
 670         for (; xpos < xmax; x+=len, xpos+= blen) {
 671             gchar inverse;
 672             inverse = Inverse(vi,y,x);
 673             len = 1;
 674             if (sizeof(CHAR_T) == sizeof(gchar))
 675                 for (; x+len < xmax &&
 676                        Inverse(vi,y,x+len) == inverse; ++len);
 677             if (inverse) {
 678                 fg = vi->reverse_gc;
 679                 bg = vi->gc;
 680             } else {
 681                 bg = vi->reverse_gc;
 682                 fg = vi->gc;
 683             }
 684             pango = 0;
 685             if (INTISUCS(*(line+x))) {
 686                 if (!vi->conx) {
 687                     PangoFontDescription font_description;
 688
 689                     font_description.family_name = g_strdup ("monospace");
 690                     font_description.style = PANGO_STYLE_NORMAL;
 691                     font_description.variant = PANGO_VARIANT_NORMAL;
 692                     font_description.weight = 500;
 693                     font_description.stretch = PANGO_STRETCH_NORMAL;
 694                     font_description.size = 15000;
 695
 696                     vi->conx = gdk_pango_context_get();
 697                     pango_context_set_font_description (vi->conx,
 698                         &font_description);
 699                     pango_context_set_lang(vi->conx, "en_US");
 700                     vi->alist = pango_attr_list_new();
 701                 }
 702                 blen = CHAR_WIDTH(NULL, *(line+x));
 703                 pango = 1;
 704             } else {
 705                 font = GTK_WIDGET(vi)->style->font;
 706                 if (sizeof(CHAR_T) == sizeof(gchar))
 707                     p = (gchar*)line+x;
 708                 else {
 709                     buf[0] = *(line+x);
 710                     p = buf;
 711                 }
 712                 blen = len;
 713             }
 714             gdk_draw_rectangle(vi->text_area, bg, 1, xpos * vi->ch_width,
 715                                 y * vi->ch_height, blen * vi->ch_width,
 716                                 vi->ch_height);
 717             /* hack to not display half a wide character that wasn't
 718              * removed.
 719              */
 720             if (!pango)
 721                 gdk_draw_text (vi->text_area, font, fg,
 722                                 xpos * vi->ch_width,
 723                                 y * vi->ch_height + vi->ch_ascent,
 724                                 p, blen);
 725             else {
 726                 PangoGlyphString *gs;
 727                 GList *list;
 728                 PangoItem *item;
 729                 char buf[3];
 730                 int len;
 731
 732                 len = ucs2utf8(line+x, 1, buf);
 733                 list = pango_itemize(vi->conx, buf, 0, len, vi->alist, NULL);
 734                 item = list->data;
 735                 gs = pango_glyph_string_new ();
 736                 pango_shape(buf, len, &item->analysis, gs);
 737
 738                 gdk_draw_glyphs (vi->text_area, fg, item->analysis.font,
 739                                 xpos * vi->ch_width,
 740                                 y * vi->ch_height + vi->ch_ascent, gs);
 741             }
 742         }
 743     }
 744 }
 745
 746 static void
 747 mark_lines(GtkViScreen *vi, gint ymin, gint xmin, gint ymax, gint xmax)
 748 {
 749     if (ymin < vi->marked_y) vi->marked_y = ymin;
 750     if (xmin < vi->marked_x) vi->marked_x = xmin;
 751     if (ymax > vi->marked_maxy) vi->marked_maxy = ymax;
 752     if (xmax > vi->marked_maxx) vi->marked_maxx = xmax;
 753 }