Pileus Git - ~andy/gtk/blob - gtk/gtktextdisplay.c

   1 /* gtktextdisplay.c - display layed-out text
   2  *
   3  * Copyright (c) 1992-1994 The Regents of the University of California.
   4  * Copyright (c) 1994-1997 Sun Microsystems, Inc.
   5  * Copyright (c) 2000 Red Hat, Inc.
   6  * Tk->Gtk port by Havoc Pennington
   7  *
   8  *
   9  * This software is copyrighted by the Regents of the University of
  10  * California, Sun Microsystems, Inc., and other parties.  The
  11  * following terms apply to all files associated with the software
  12  * unless explicitly disclaimed in individual files.
  13  *
  14  * The authors hereby grant permission to use, copy, modify,
  15  * distribute, and license this software and its documentation for any
  16  * purpose, provided that existing copyright notices are retained in
  17  * all copies and that this notice is included verbatim in any
  18  * distributions. No written agreement, license, or royalty fee is
  19  * required for any of the authorized uses.  Modifications to this
  20  * software may be copyrighted by their authors and need not follow
  21  * the licensing terms described here, provided that the new terms are
  22  * clearly indicated on the first page of each file where they apply.
  23  *
  24  * IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
  25  * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
  26  * DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
  27  * OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
  28  * OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
  31  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  32  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
  33  * NON-INFRINGEMENT.  THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
  34  * AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
  35  * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  36  *
  37  * GOVERNMENT USE: If you are acquiring this software on behalf of the
  38  * U.S. government, the Government shall have only "Restricted Rights"
  39  * in the software and related documentation as defined in the Federal
  40  * Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2).  If you
  41  * are acquiring the software on behalf of the Department of Defense,
  42  * the software shall be classified as "Commercial Computer Software"
  43  * and the Government shall have only "Restricted Rights" as defined
  44  * in Clause 252.227-7013 (c) (1) of DFARs.  Notwithstanding the
  45  * foregoing, the authors grant the U.S. Government and others acting
  46  * in its behalf permission to use and distribute the software in
  47  * accordance with the terms specified in this license.
  48  *
  49  */
  50
  51 #include "gtktextdisplay.h"
  52 #include "gtktextiterprivate.h"
  53 #include <pango/pangox.h>
  54 #include "x11/gdkx.h"
  55
  56 typedef struct _GtkTextRenderState GtkTextRenderState;
  57
  58 struct _GtkTextRenderState
  59 {
  60   GtkWidget *widget;
  61
  62   GtkTextAppearance *last_appearance;
  63   GdkGC *fg_gc;
  64   GdkGC *bg_gc;
  65   GdkRectangle clip_rect;
  66 };
  67
  68 static void       get_item_properties (PangoItem           *item,
  69                                        GtkTextAppearance  **appearance);
  70 static GdkRegion *get_selected_clip   (GtkTextRenderState  *render_state,
  71                                        PangoLayout         *layout,
  72                                        PangoLayoutLine     *line,
  73                                        int                  x,
  74                                        int                  y,
  75                                        int                  height,
  76                                        int                  start_index,
  77                                        int                  end_index);
  78
  79 static GtkTextRenderState *
  80 gtk_text_render_state_new (GtkWidget    *widget,
  81                            GdkDrawable  *drawable,
  82                            GdkRectangle *clip_rect)
  83 {
  84   GtkTextRenderState *state = g_new0 (GtkTextRenderState, 1);
  85
  86   state->widget = widget;
  87   state->fg_gc = gdk_gc_new (drawable);
  88   state->bg_gc = gdk_gc_new (drawable);
  89   state->clip_rect = *clip_rect;
  90
  91   return state;
  92 }
  93
  94 static void
  95 gtk_text_render_state_destroy (GtkTextRenderState *state)
  96 {
  97   gdk_gc_unref (state->fg_gc);
  98   gdk_gc_unref (state->bg_gc);
  99
 100   g_free (state);
 101 }
 102
 103 static void
 104 gtk_text_render_state_set_color (GtkTextRenderState *state,
 105                                  GdkGC              *gc,
 106                                  GdkColor           *color)
 107 {
 108   gdk_colormap_alloc_color (gtk_widget_get_colormap (state->widget), color, FALSE, TRUE);
 109   gdk_gc_set_foreground (gc, color);
 110 }
 111
 112 static void
 113 gtk_text_render_state_update (GtkTextRenderState *state,
 114                               GtkTextAppearance  *new_appearance)
 115 {
 116   if (!state->last_appearance ||
 117       !gdk_color_equal (&new_appearance->fg_color, &state->last_appearance->fg_color))
 118     gtk_text_render_state_set_color (state, state->fg_gc, &new_appearance->fg_color);
 119
 120   if (!state->last_appearance ||
 121       new_appearance->fg_stipple != state->last_appearance->fg_stipple)
 122     {
 123       if (new_appearance->fg_stipple)
 124         {
 125           gdk_gc_set_fill(state->fg_gc, GDK_STIPPLED);
 126           gdk_gc_set_stipple(state->fg_gc, new_appearance->fg_stipple);
 127         }
 128       else
 129         {
 130           gdk_gc_set_fill(state->fg_gc, GDK_SOLID);
 131         }
 132     }
 133
 134   if (new_appearance->draw_bg)
 135     {
 136       if (!state->last_appearance ||
 137           !gdk_color_equal (&new_appearance->bg_color, &state->last_appearance->bg_color))
 138         gtk_text_render_state_set_color (state, state->bg_gc, &new_appearance->bg_color);
 139
 140       if (!state->last_appearance ||
 141           new_appearance->bg_stipple != state->last_appearance->bg_stipple)
 142         {
 143           if (new_appearance->bg_stipple)
 144             {
 145               gdk_gc_set_fill(state->bg_gc, GDK_STIPPLED);
 146               gdk_gc_set_stipple(state->bg_gc, new_appearance->bg_stipple);
 147             }
 148           else
 149             {
 150               gdk_gc_set_fill(state->bg_gc, GDK_SOLID);
 151             }
 152         }
 153     }
 154
 155   state->last_appearance = new_appearance;
 156 }
 157
 158 static void
 159 render_layout_line (GdkDrawable        *drawable,
 160                     GtkTextRenderState *render_state,
 161                     PangoLayoutLine    *line,
 162                     GSList            **pixmap_pointer,
 163                     int                 x,
 164                     int                 y,
 165                     gboolean            selected)
 166 {
 167   GSList *tmp_list = line->runs;
 168   PangoRectangle overall_rect;
 169   PangoRectangle logical_rect;
 170   PangoRectangle ink_rect;
 171
 172   gint x_off = 0;
 173
 174   pango_layout_line_get_extents (line, NULL, &overall_rect);
 175
 176   while (tmp_list)
 177     {
 178       PangoLayoutRun *run = tmp_list->data;
 179       GtkTextAppearance *appearance;
 180
 181       tmp_list = tmp_list->next;
 182
 183       get_item_properties (run->item, &appearance);
 184
 185       if (appearance)           /* A text segment */
 186         {
 187           GdkGC *fg_gc;
 188
 189           if (selected)
 190             {
 191               fg_gc = render_state->widget->style->fg_gc[GTK_STATE_SELECTED];
 192             }
 193           else
 194             {
 195               gtk_text_render_state_update (render_state, appearance);
 196
 197               fg_gc = render_state->fg_gc;
 198             }
 199
 200           if (appearance->underline == PANGO_UNDERLINE_NONE && !appearance->overstrike)
 201             pango_glyph_string_extents (run->glyphs, run->item->analysis.font,
 202                                         NULL, &logical_rect);
 203           else
 204             pango_glyph_string_extents (run->glyphs, run->item->analysis.font,
 205                                         &ink_rect, &logical_rect);
 206
 207           if (appearance->draw_bg && !selected)
 208             gdk_draw_rectangle (drawable, render_state->bg_gc, TRUE,
 209                                 x + (x_off + logical_rect.x) / PANGO_SCALE,
 210                                 y + logical_rect.y / PANGO_SCALE,
 211                                 logical_rect.width / PANGO_SCALE,
 212                                 logical_rect.height / PANGO_SCALE);
 213
 214           gdk_draw_glyphs (drawable, fg_gc,
 215                            run->item->analysis.font,
 216                            x + x_off / PANGO_SCALE, y, run->glyphs);
 217
 218           switch (appearance->underline)
 219             {
 220             case PANGO_UNDERLINE_NONE:
 221               break;
 222             case PANGO_UNDERLINE_DOUBLE:
 223               gdk_draw_line (drawable, fg_gc,
 224                          x + (x_off + ink_rect.x) / PANGO_SCALE - 1, y + 4,
 225                          x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE, y + 4);
 226               /* Fall through */
 227             case PANGO_UNDERLINE_SINGLE:
 228               gdk_draw_line (drawable, fg_gc,
 229                          x + (x_off + ink_rect.x) / PANGO_SCALE - 1, y + 2,
 230                          x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE, y + 2);
 231               break;
 232             case PANGO_UNDERLINE_LOW:
 233               gdk_draw_line (drawable, fg_gc,
 234                          x + (x_off + ink_rect.x) / PANGO_SCALE - 1, y + (ink_rect.y + ink_rect.height) / PANGO_SCALE + 2,
 235                          x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE, y + (ink_rect.y + ink_rect.height) / PANGO_SCALE + 2);
 236               break;
 237             }
 238
 239           if (appearance->overstrike)
 240             {
 241               gint overstrike_y = y + (0.3 * logical_rect.y) / PANGO_SCALE;
 242               gdk_draw_line (drawable, fg_gc,
 243                              x + (x_off + ink_rect.x) / PANGO_SCALE - 1, overstrike_y,
 244                              x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE, overstrike_y);
 245             }
 246
 247           x_off += logical_rect.width;
 248         }
 249       else                      /* Pixmap segment */
 250         {
 251           GtkTextPixmap *pixmap = (*pixmap_pointer)->data;
 252           gint width, height;
 253           GdkRectangle pixmap_rect, draw_rect;
 254
 255           *pixmap_pointer = (*pixmap_pointer)->next;
 256
 257           gdk_drawable_get_size (pixmap->pixmap, &width, &height);
 258
 259           pixmap_rect.x = x + x_off / PANGO_SCALE;
 260           pixmap_rect.y = y - height;
 261           pixmap_rect.width = width;
 262           pixmap_rect.height = height;
 263
 264           gdk_rectangle_intersect (&pixmap_rect, &render_state->clip_rect, &draw_rect);
 265
 266           if (pixmap->mask)
 267             {
 268               gdk_gc_set_clip_mask (render_state->fg_gc, pixmap->mask);
 269               gdk_gc_set_clip_origin (render_state->fg_gc,
 270                                       pixmap_rect.x, pixmap_rect.y);
 271             }
 272
 273           gdk_draw_drawable (drawable, render_state->fg_gc, pixmap->pixmap,
 274                              draw_rect.x - pixmap_rect.x, draw_rect.y - pixmap_rect.y,
 275                              draw_rect.x, draw_rect.y, draw_rect.width, draw_rect.height);
 276
 277           if (pixmap->mask)
 278             gdk_gc_set_clip_rectangle (render_state->fg_gc, &render_state->clip_rect);
 279
 280           x_off += width * PANGO_SCALE;
 281         }
 282     }
 283 }
 284
 285 static void
 286 render_para (GdkDrawable        *drawable,
 287              GtkTextRenderState *render_state,
 288              GtkTextLineDisplay *line_display,
 289              int                 x,
 290              int                 y,
 291              int                 selection_start_index,
 292              int                 selection_end_index)
 293 {
 294   PangoRectangle logical_rect;
 295   GSList *pixmap_pointer = line_display->pixmaps;
 296   GSList *tmp_list;
 297   PangoAlignment align;
 298   PangoLayout *layout = line_display->layout;
 299   int indent;
 300   int total_width;
 301   int y_offset = 0;
 302   int byte_offset = 0;
 303
 304   gboolean first = TRUE;
 305
 306   indent = pango_layout_get_indent (layout);
 307   total_width = pango_layout_get_width (layout);
 308   align = pango_layout_get_alignment (layout);
 309
 310   if (total_width < 0)
 311     total_width = line_display->total_width * PANGO_SCALE;
 312
 313   tmp_list = pango_layout_get_lines (layout);
 314   while (tmp_list)
 315     {
 316       PangoLayoutLine *line = tmp_list->data;
 317       int x_offset;
 318       int selection_y, selection_height;
 319
 320       pango_layout_line_get_extents (line, NULL, &logical_rect);
 321
 322       x_offset = line_display->left_margin * PANGO_SCALE;
 323
 324       switch (align)
 325         {
 326         case PANGO_ALIGN_RIGHT:
 327           x_offset += total_width - logical_rect.width;
 328           break;
 329         case PANGO_ALIGN_CENTER:
 330           x_offset += (total_width - logical_rect.width) / 2;
 331           break;
 332         default:
 333           break;
 334         }
 335
 336       if (first)
 337         {
 338           if (indent > 0)
 339             {
 340               if (align == PANGO_ALIGN_LEFT)
 341                 x_offset += indent;
 342               else
 343                 x_offset -= indent;
 344             }
 345         }
 346       else
 347         {
 348           if (indent < 0)
 349             {
 350               if (align == PANGO_ALIGN_LEFT)
 351                 x_offset -= indent;
 352               else
 353                 x_offset += indent;
 354             }
 355         }
 356
 357       selection_y = y + y_offset / PANGO_SCALE;
 358       selection_height = logical_rect.height / PANGO_SCALE;
 359
 360       if (first)
 361         {
 362           selection_y -= line_display->top_margin;
 363           selection_height += line_display->top_margin;
 364         }
 365       if (!tmp_list->next)
 366         selection_height += line_display->bottom_margin;
 367
 368       first = FALSE;
 369
 370       if (selection_start_index < byte_offset &&
 371           selection_end_index > line->length + byte_offset) /* All selected */
 372         {
 373           gdk_draw_rectangle (drawable,
 374                               render_state->widget->style->bg_gc[GTK_STATE_SELECTED],
 375                               TRUE,
 376                               x + line_display->left_margin, selection_y,
 377                               total_width / PANGO_SCALE, selection_height);
 378           render_layout_line (drawable, render_state, line, &pixmap_pointer,
 379                               x + x_offset / PANGO_SCALE, y + (y_offset - logical_rect.y) / PANGO_SCALE,
 380                               TRUE);
 381         }
 382       else
 383         {
 384           GSList *pixmap_pointer_tmp = pixmap_pointer;
 385
 386           render_layout_line (drawable, render_state, line, &pixmap_pointer,
 387                               x + x_offset / PANGO_SCALE, y + (y_offset - logical_rect.y) / PANGO_SCALE,
 388                               FALSE);
 389
 390           if (selection_start_index < byte_offset + line->length &&
 391               selection_end_index > byte_offset) /* Some selected */
 392             {
 393               GdkRegion *clip_region = get_selected_clip (render_state, layout, line,
 394                                                           x + line_display->x_offset,
 395                                                           selection_y, selection_height,
 396                                                           selection_start_index, selection_end_index);
 397
 398               gdk_gc_set_clip_region (render_state->widget->style->fg_gc [GTK_STATE_SELECTED], clip_region);
 399               gdk_gc_set_clip_region (render_state->widget->style->bg_gc [GTK_STATE_SELECTED], clip_region);
 400
 401               gdk_draw_rectangle (drawable,
 402                                   render_state->widget->style->bg_gc[GTK_STATE_SELECTED],
 403                                   TRUE,
 404                                   x + x_offset / PANGO_SCALE, selection_y,
 405                                   logical_rect.width / PANGO_SCALE,
 406                                   selection_height);
 407
 408               render_layout_line (drawable, render_state, line, &pixmap_pointer_tmp,
 409                                   x + x_offset / PANGO_SCALE, y + (y_offset - logical_rect.y) / PANGO_SCALE,
 410                                   TRUE);
 411
 412               gdk_gc_set_clip_region (render_state->widget->style->fg_gc [GTK_STATE_SELECTED], NULL);
 413               gdk_gc_set_clip_region (render_state->widget->style->bg_gc [GTK_STATE_SELECTED], NULL);
 414
 415               gdk_region_destroy (clip_region);
 416
 417               /* Paint in the ends of the line */
 418               if (x_offset > line_display->left_margin * PANGO_SCALE &&
 419                   ((line_display->direction == GTK_TEXT_DIR_LTR && selection_start_index < byte_offset) ||
 420                    (line_display->direction == GTK_TEXT_DIR_RTL && selection_end_index > byte_offset + line->length)))
 421                 {
 422                   gdk_draw_rectangle (drawable,
 423                                       render_state->widget->style->bg_gc[GTK_STATE_SELECTED],
 424                                       TRUE,
 425                                       x + line_display->left_margin, selection_y,
 426                                       x + x_offset / PANGO_SCALE - line_display->left_margin,
 427                                       selection_height);
 428                 }
 429
 430               if (x_offset + logical_rect.width < line_display->left_margin * PANGO_SCALE + total_width &&
 431                   ((line_display->direction == GTK_TEXT_DIR_LTR && selection_end_index > byte_offset + line->length) ||
 432                    (line_display->direction == GTK_TEXT_DIR_RTL && selection_start_index < byte_offset)))
 433                 {
 434
 435
 436                   gdk_draw_rectangle (drawable,
 437                                       render_state->widget->style->bg_gc[GTK_STATE_SELECTED],
 438                                       TRUE,
 439                                       x + (x_offset + logical_rect.width) / PANGO_SCALE,
 440                                       selection_y,
 441                                       x + (line_display->left_margin * PANGO_SCALE + total_width - x_offset - logical_rect.width) / PANGO_SCALE,
 442                                       selection_height);
 443                 }
 444             }
 445         }
 446
 447       byte_offset += line->length;
 448       y_offset += logical_rect.height;
 449       tmp_list = tmp_list->next;
 450     }
 451 }
 452
 453 static GdkRegion *
 454 get_selected_clip (GtkTextRenderState *render_state,
 455                    PangoLayout        *layout,
 456                    PangoLayoutLine    *line,
 457                    int                 x,
 458                    int                 y,
 459                    int                 height,
 460                    int                 start_index,
 461                    int                 end_index)
 462 {
 463   gint *ranges;
 464   gint n_ranges, i;
 465   GdkRegion *clip_region = gdk_region_new ();
 466   GdkRegion *tmp_region;
 467   PangoRectangle logical_rect;
 468
 469   pango_layout_line_get_extents (line, NULL, &logical_rect);
 470   pango_layout_line_get_x_ranges (line, start_index, end_index, &ranges, &n_ranges);
 471
 472   for (i=0; i < n_ranges; i++)
 473     {
 474       GdkRectangle rect;
 475
 476       rect.x = x + ranges[2*i] / PANGO_SCALE;
 477       rect.y = y;
 478       rect.width = (ranges[2*i + 1] - ranges[2*i]) / PANGO_SCALE;
 479       rect.height = height;
 480
 481       gdk_region_union_with_rect (clip_region, &rect);
 482     }
 483
 484   tmp_region = gdk_region_rectangle (&render_state->clip_rect);
 485   gdk_region_intersect (clip_region, tmp_region);
 486   gdk_region_destroy (tmp_region);
 487
 488   g_free (ranges);
 489   return clip_region;
 490 }
 491
 492 static void
 493 get_item_properties (PangoItem          *item,
 494                      GtkTextAppearance **appearance)
 495 {
 496   GSList *tmp_list = item->extra_attrs;
 497
 498   *appearance = NULL;
 499
 500   while (tmp_list)
 501     {
 502       PangoAttribute *attr = tmp_list->data;
 503
 504       if (attr->klass->type == gtk_text_attr_appearance_type)
 505         {
 506           *appearance = &((GtkTextAttrAppearance *)attr)->appearance;
 507         }
 508
 509       tmp_list = tmp_list->next;
 510     }
 511 }
 512
 513 void
 514 gtk_text_layout_draw (GtkTextLayout *layout,
 515                       GtkWidget *widget,
 516                       GdkDrawable *drawable,
 517                       /* Location of the layout
 518                          in buffer coordinates */
 519                       gint x_offset,
 520                       gint y_offset,
 521                       /* Region of the layout to
 522                          render */
 523                       gint x,
 524                       gint y,
 525                       gint width,
 526                       gint height)
 527 {
 528   GdkRectangle clip;
 529   gint current_y;
 530   GSList *line_list;
 531   GSList *tmp_list;
 532   GSList *cursor_list;
 533   GtkTextRenderState *render_state;
 534   GtkTextIter selection_start, selection_end;
 535   gboolean have_selection = FALSE;
 536
 537   g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
 538   g_return_if_fail (layout->default_style != NULL);
 539   g_return_if_fail (layout->buffer != NULL);
 540   g_return_if_fail (drawable != NULL);
 541   g_return_if_fail (x_offset >= 0);
 542   g_return_if_fail (y_offset >= 0);
 543   g_return_if_fail (width >= 0);
 544   g_return_if_fail (height >= 0);
 545
 546   if (width == 0 || height == 0)
 547     return;
 548
 549   line_list =  gtk_text_layout_get_lines (layout, y + y_offset, y + y_offset + height, &current_y);
 550   current_y -= y_offset;
 551
 552   if (line_list == NULL)
 553     return; /* nothing on the screen */
 554
 555   clip.x = x;
 556   clip.y = y;
 557   clip.width = width;
 558   clip.height = height;
 559
 560   render_state = gtk_text_render_state_new (widget, drawable, &clip);
 561
 562   gdk_gc_set_clip_rectangle (render_state->fg_gc, &clip);
 563   gdk_gc_set_clip_rectangle (render_state->bg_gc, &clip);
 564
 565   gtk_text_layout_wrap_loop_start (layout);
 566
 567   if (gtk_text_buffer_get_selection_bounds (layout->buffer,
 568                                             &selection_start,
 569                                             &selection_end))
 570     have_selection = TRUE;
 571
 572   tmp_list = line_list;
 573   while (tmp_list != NULL)
 574     {
 575       GtkTextLineDisplay *line_display;
 576       gint selection_start_index = -1;
 577       gint selection_end_index = -1;
 578
 579       GtkTextLine *line = tmp_list->data;
 580
 581       line_display = gtk_text_layout_get_line_display (layout, line, FALSE);
 582
 583       if (have_selection)
 584         {
 585           GtkTextIter line_start, line_end;
 586           gint byte_count = gtk_text_line_byte_count (line);
 587
 588           gtk_text_btree_get_iter_at_line (layout->buffer->tree, &line_start,
 589                                            line, 0);
 590           gtk_text_btree_get_iter_at_line (layout->buffer->tree, &line_end,
 591                                            line, byte_count - 1);
 592
 593           if (gtk_text_iter_compare (&selection_start, &line_end) < 0 &&
 594               gtk_text_iter_compare (&selection_end, &line_start) > 0)
 595             {
 596               if (gtk_text_iter_compare (&selection_start, &line_start) >= 0)
 597                 selection_start_index = gtk_text_iter_get_line_byte (&selection_start);
 598               else
 599                 selection_start_index = -1;
 600
 601               if (gtk_text_iter_compare (&selection_end, &line_end) <= 0)
 602                 selection_end_index = gtk_text_iter_get_line_byte (&selection_end);
 603               else
 604                 selection_end_index = byte_count;
 605             }
 606         }
 607
 608       render_para (drawable, render_state, line_display,
 609                    - x_offset,
 610                    current_y + line_display->top_margin,
 611                    selection_start_index, selection_end_index);
 612
 613
 614       /* We paint the cursors last, because they overlap another chunk
 615          and need to appear on top. */
 616
 617       cursor_list = line_display->cursors;
 618       while (cursor_list)
 619         {
 620           GtkTextCursorDisplay *cursor = cursor_list->data;
 621           GdkGC *gc;
 622
 623           if (cursor->is_strong)
 624             gc = widget->style->bg_gc[GTK_STATE_SELECTED];
 625           else
 626             gc = widget->style->fg_gc[GTK_STATE_NORMAL];
 627
 628           gdk_draw_line (drawable, gc,
 629                          line_display->x_offset + cursor->x,
 630                          current_y + line_display->top_margin + cursor->y,
 631                          line_display->x_offset + cursor->x,
 632                          current_y + line_display->top_margin + cursor->y + cursor->height);
 633
 634           cursor_list = cursor_list->next;
 635         }
 636
 637       current_y += line_display->height;
 638       gtk_text_layout_free_line_display (layout, line_display);
 639
 640       tmp_list = g_slist_next (tmp_list);
 641     }
 642
 643   gtk_text_layout_wrap_loop_end (layout);
 644   gtk_text_render_state_destroy (render_state);
 645
 646   g_slist_free (line_list);
 647 }