1 /* gtktextdisplay.c - display layed-out text
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
8 * This file can be used under your choice of two licenses, the LGPL
9 * and the original Tk license.
13 * This library is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2 of the License, or (at your option) any later version.
18 * This library is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with this library; if not, write to the Free
25 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 * Original Tk license:
29 * This software is copyrighted by the Regents of the University of
30 * California, Sun Microsystems, Inc., and other parties. The
31 * following terms apply to all files associated with the software
32 * unless explicitly disclaimed in individual files.
34 * The authors hereby grant permission to use, copy, modify,
35 * distribute, and license this software and its documentation for any
36 * purpose, provided that existing copyright notices are retained in
37 * all copies and that this notice is included verbatim in any
38 * distributions. No written agreement, license, or royalty fee is
39 * required for any of the authorized uses. Modifications to this
40 * software may be copyrighted by their authors and need not follow
41 * the licensing terms described here, provided that the new terms are
42 * clearly indicated on the first page of each file where they apply.
44 * IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
45 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
46 * DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
47 * OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
48 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
51 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
52 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
53 * NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
54 * AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
55 * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
57 * GOVERNMENT USE: If you are acquiring this software on behalf of the
58 * U.S. government, the Government shall have only "Restricted Rights"
59 * in the software and related documentation as defined in the Federal
60 * Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
61 * are acquiring the software on behalf of the Department of Defense,
62 * the software shall be classified as "Commercial Computer Software"
63 * and the Government shall have only "Restricted Rights" as defined
64 * in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
65 * foregoing, the authors grant the U.S. Government and others acting
66 * in its behalf permission to use and distribute the software in
67 * accordance with the terms specified in this license.
71 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
72 * file for a list of people on the GTK+ Team. See the ChangeLog
73 * files for a list of changes. These files are distributed with
74 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
77 #define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
79 #include "gtktextdisplay.h"
81 /* DO NOT go putting private headers in here. This file should only
82 * use the semi-public headers, as with gtktextview.c.
85 #define GTK_TYPE_TEXT_RENDERER (_gtk_text_renderer_get_type())
86 #define GTK_TEXT_RENDERER(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GTK_TYPE_TEXT_RENDERER, GtkTextRenderer))
87 #define GTK_IS_TEXT_RENDERER(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GTK_TYPE_TEXT_RENDERER))
88 #define GTK_TEXT_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_TEXT_RENDERER, GtkTextRendererClass))
89 #define GTK_IS_TEXT_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_TEXT_RENDERER))
90 #define GTK_TEXT_RENDERER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_TEXT_RENDERER, GtkTextRendererClass))
92 typedef struct _GtkTextRenderer GtkTextRenderer;
93 typedef struct _GtkTextRendererClass GtkTextRendererClass;
101 struct _GtkTextRenderer
103 PangoRenderer parent_instance;
108 GdkColor *error_color; /* Error underline color for this widget */
109 GList *widgets; /* widgets encountered when drawing */
114 struct _GtkTextRendererClass
116 PangoRendererClass parent_class;
119 G_DEFINE_TYPE (GtkTextRenderer, _gtk_text_renderer, PANGO_TYPE_RENDERER)
122 text_renderer_set_gdk_color (GtkTextRenderer *text_renderer,
123 PangoRenderPart part,
126 PangoRenderer *renderer = PANGO_RENDERER (text_renderer);
132 color.red = gdk_color->red;
133 color.green = gdk_color->green;
134 color.blue = gdk_color->blue;
136 pango_renderer_set_color (renderer, part, &color);
139 pango_renderer_set_color (renderer, part, NULL);
143 text_renderer_set_rgba (GtkTextRenderer *text_renderer,
144 PangoRenderPart part,
147 PangoRenderer *renderer = PANGO_RENDERER (text_renderer);
153 color.red = CLAMP (rgba->red * 65535. + 0.5, 0, 65535);
154 color.green = CLAMP (rgba->green * 65535. + 0.5, 0, 65535);
155 color.blue = CLAMP (rgba->blue * 65535. + 0.5, 0, 65535);
157 pango_renderer_set_color (renderer, part, &color);
160 pango_renderer_set_color (renderer, part, NULL);
163 static GtkTextAppearance *
164 get_item_appearance (PangoItem *item)
166 GSList *tmp_list = item->analysis.extra_attrs;
170 PangoAttribute *attr = tmp_list->data;
172 if (attr->klass->type == gtk_text_attr_appearance_type)
173 return &((GtkTextAttrAppearance *)attr)->appearance;
175 tmp_list = tmp_list->next;
182 gtk_text_renderer_prepare_run (PangoRenderer *renderer,
185 GtkStyleContext *context;
187 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
188 GdkColor *bg_color = NULL;
189 GdkRGBA *fg_rgba = NULL;
190 GdkColor *fg_color = NULL;
191 GtkTextAppearance *appearance;
193 PANGO_RENDERER_CLASS (_gtk_text_renderer_parent_class)->prepare_run (renderer, run);
195 appearance = get_item_appearance (run->item);
196 g_assert (appearance != NULL);
198 context = gtk_widget_get_style_context (text_renderer->widget);
200 state = gtk_widget_get_state_flags (text_renderer->widget);
202 if (appearance->draw_bg && text_renderer->state == NORMAL)
203 bg_color = &appearance->bg_color;
207 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_BACKGROUND, bg_color);
209 if (text_renderer->state == SELECTED)
211 state |= GTK_STATE_FLAG_SELECTED;
213 gtk_style_context_get (context, state,
217 else if (text_renderer->state == CURSOR && gtk_widget_has_focus (text_renderer->widget))
219 gtk_style_context_get (context, state,
220 "background-color", &fg_rgba,
224 fg_color = &appearance->fg_color;
228 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_FOREGROUND, fg_rgba);
229 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_STRIKETHROUGH,fg_rgba);
233 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_FOREGROUND, fg_color);
234 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_STRIKETHROUGH, fg_color);
237 if (appearance->underline == PANGO_UNDERLINE_ERROR)
239 if (!text_renderer->error_color)
241 gtk_style_context_get_style (context,
242 "error-underline-color", &text_renderer->error_color,
245 if (!text_renderer->error_color)
247 static const GdkColor red = { 0, 0xffff, 0, 0 };
248 text_renderer->error_color = gdk_color_copy (&red);
252 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_UNDERLINE, text_renderer->error_color);
255 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_UNDERLINE, fg_rgba);
257 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_UNDERLINE, fg_color);
261 set_color (GtkTextRenderer *text_renderer,
262 PangoRenderPart part)
266 cairo_save (text_renderer->cr);
268 color = pango_renderer_get_color (PANGO_RENDERER (text_renderer), part);
270 cairo_set_source_rgb (text_renderer->cr,
272 color->green / 65535.,
273 color->blue / 65535.);
277 unset_color (GtkTextRenderer *text_renderer)
279 cairo_restore (text_renderer->cr);
283 gtk_text_renderer_draw_glyphs (PangoRenderer *renderer,
285 PangoGlyphString *glyphs,
289 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
291 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
293 cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
294 pango_cairo_show_glyph_string (text_renderer->cr, font, glyphs);
296 unset_color (text_renderer);
300 gtk_text_renderer_draw_glyph_item (PangoRenderer *renderer,
302 PangoGlyphItem *glyph_item,
306 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
308 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
310 cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
311 pango_cairo_show_glyph_item (text_renderer->cr, text, glyph_item);
313 unset_color (text_renderer);
317 gtk_text_renderer_draw_rectangle (PangoRenderer *renderer,
318 PangoRenderPart part,
324 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
326 set_color (text_renderer, part);
328 cairo_rectangle (text_renderer->cr,
329 (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
330 (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
331 cairo_fill (text_renderer->cr);
333 unset_color (text_renderer);
337 gtk_text_renderer_draw_trapezoid (PangoRenderer *renderer,
338 PangoRenderPart part,
346 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
348 cairo_matrix_t matrix;
350 set_color (text_renderer, part);
352 cr = text_renderer->cr;
354 cairo_get_matrix (cr, &matrix);
355 matrix.xx = matrix.yy = 1.0;
356 matrix.xy = matrix.yx = 0.0;
357 cairo_set_matrix (cr, &matrix);
359 cairo_move_to (cr, x11, y1_);
360 cairo_line_to (cr, x21, y1_);
361 cairo_line_to (cr, x22, y2);
362 cairo_line_to (cr, x12, y2);
363 cairo_close_path (cr);
367 unset_color (text_renderer);
371 gtk_text_renderer_draw_error_underline (PangoRenderer *renderer,
377 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
379 set_color (text_renderer, PANGO_RENDER_PART_UNDERLINE);
381 pango_cairo_show_error_underline (text_renderer->cr,
382 (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
383 (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
385 unset_color (text_renderer);
389 gtk_text_renderer_draw_shape (PangoRenderer *renderer,
390 PangoAttrShape *attr,
394 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
396 if (attr->data == NULL)
398 /* This happens if we have an empty widget anchor. Draw
399 * something empty-looking.
401 GdkRectangle shape_rect;
404 shape_rect.x = PANGO_PIXELS (x);
405 shape_rect.y = PANGO_PIXELS (y + attr->logical_rect.y);
406 shape_rect.width = PANGO_PIXELS (x + attr->logical_rect.width) - shape_rect.x;
407 shape_rect.height = PANGO_PIXELS (y + attr->logical_rect.y + attr->logical_rect.height) - shape_rect.y;
409 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
411 cr = text_renderer->cr;
413 cairo_set_line_width (cr, 1.0);
416 shape_rect.x + 0.5, shape_rect.y + 0.5,
417 shape_rect.width - 1, shape_rect.height - 1);
418 cairo_move_to (cr, shape_rect.x + 0.5, shape_rect.y + 0.5);
420 shape_rect.x + shape_rect.width - 0.5,
421 shape_rect.y + shape_rect.height - 0.5);
422 cairo_move_to (cr, shape_rect.x + 0.5,
423 shape_rect.y + shape_rect.height - 0.5);
424 cairo_line_to (cr, shape_rect.x + shape_rect.width - 0.5,
429 unset_color (text_renderer);
431 else if (GDK_IS_PIXBUF (attr->data))
433 cairo_t *cr = text_renderer->cr;
434 GdkPixbuf *pixbuf = GDK_PIXBUF (attr->data);
438 gdk_cairo_set_source_pixbuf (cr, pixbuf,
440 PANGO_PIXELS (y) - gdk_pixbuf_get_height (pixbuf));
445 else if (GTK_IS_WIDGET (attr->data))
449 widget = GTK_WIDGET (attr->data);
451 text_renderer->widgets = g_list_prepend (text_renderer->widgets,
452 g_object_ref (widget));
455 g_assert_not_reached (); /* not a pixbuf or widget */
459 gtk_text_renderer_finalize (GObject *object)
461 G_OBJECT_CLASS (_gtk_text_renderer_parent_class)->finalize (object);
465 _gtk_text_renderer_init (GtkTextRenderer *renderer)
470 _gtk_text_renderer_class_init (GtkTextRendererClass *klass)
472 GObjectClass *object_class = G_OBJECT_CLASS (klass);
474 PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass);
476 renderer_class->prepare_run = gtk_text_renderer_prepare_run;
477 renderer_class->draw_glyphs = gtk_text_renderer_draw_glyphs;
478 renderer_class->draw_glyph_item = gtk_text_renderer_draw_glyph_item;
479 renderer_class->draw_rectangle = gtk_text_renderer_draw_rectangle;
480 renderer_class->draw_trapezoid = gtk_text_renderer_draw_trapezoid;
481 renderer_class->draw_error_underline = gtk_text_renderer_draw_error_underline;
482 renderer_class->draw_shape = gtk_text_renderer_draw_shape;
484 object_class->finalize = gtk_text_renderer_finalize;
488 text_renderer_set_state (GtkTextRenderer *text_renderer,
491 text_renderer->state = state;
495 text_renderer_begin (GtkTextRenderer *text_renderer,
499 GtkStyleContext *context;
503 text_renderer->widget = widget;
504 text_renderer->cr = cr;
506 context = gtk_widget_get_style_context (widget);
508 gtk_style_context_save (context);
509 gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW);
511 state = gtk_widget_get_state_flags (widget);
512 gtk_style_context_get_color (context, state, &color);
516 gdk_cairo_set_source_rgba (cr, &color);
519 /* Returns a GSList of (referenced) widgets encountered while drawing.
522 text_renderer_end (GtkTextRenderer *text_renderer)
524 GtkStyleContext *context;
525 GList *widgets = text_renderer->widgets;
527 cairo_restore (text_renderer->cr);
529 context = gtk_widget_get_style_context (text_renderer->widget);
531 gtk_style_context_restore (context);
533 text_renderer->widget = NULL;
534 text_renderer->cr = NULL;
536 text_renderer->widgets = NULL;
538 if (text_renderer->error_color)
540 gdk_color_free (text_renderer->error_color);
541 text_renderer->error_color = NULL;
547 static cairo_region_t *
548 get_selected_clip (GtkTextRenderer *text_renderer,
550 PangoLayoutLine *line,
559 cairo_region_t *clip_region = cairo_region_create ();
561 pango_layout_line_get_x_ranges (line, start_index, end_index, &ranges, &n_ranges);
563 for (i=0; i < n_ranges; i++)
567 rect.x = x + PANGO_PIXELS (ranges[2*i]);
569 rect.width = PANGO_PIXELS (ranges[2*i + 1]) - PANGO_PIXELS (ranges[2*i]);
570 rect.height = height;
572 cairo_region_union_rectangle (clip_region, &rect);
580 render_para (GtkTextRenderer *text_renderer,
581 GtkTextLineDisplay *line_display,
582 /* Top-left corner of paragraph including all margins */
585 int selection_start_index,
586 int selection_end_index)
588 GtkStyleContext *context;
590 PangoLayout *layout = line_display->layout;
592 PangoLayoutIter *iter;
593 PangoRectangle layout_logical;
596 gboolean first = TRUE;
598 iter = pango_layout_get_iter (layout);
600 pango_layout_iter_get_layout_extents (iter, NULL, &layout_logical);
602 /* Adjust for margins */
604 layout_logical.x += line_display->x_offset * PANGO_SCALE;
605 layout_logical.y += line_display->top_margin * PANGO_SCALE;
607 screen_width = line_display->total_width;
609 context = gtk_widget_get_style_context (text_renderer->widget);
611 state = GTK_STATE_FLAG_SELECTED;
612 if (gtk_widget_has_focus (text_renderer->widget))
613 state |= GTK_STATE_FLAG_FOCUSED;
615 gtk_style_context_get_background_color (context, state, &selection);
619 PangoLayoutLine *line = pango_layout_iter_get_line_readonly (iter);
620 int selection_y, selection_height;
622 PangoRectangle line_rect;
624 gboolean at_last_line;
626 pango_layout_iter_get_line_extents (iter, NULL, &line_rect);
627 baseline = pango_layout_iter_get_baseline (iter);
628 pango_layout_iter_get_line_yrange (iter, &first_y, &last_y);
630 /* Adjust for margins */
632 line_rect.x += line_display->x_offset * PANGO_SCALE;
633 line_rect.y += line_display->top_margin * PANGO_SCALE;
634 baseline += line_display->top_margin * PANGO_SCALE;
636 /* Selection is the height of the line, plus top/bottom
637 * margin if we're the first/last line
639 selection_y = y + PANGO_PIXELS (first_y) + line_display->top_margin;
640 selection_height = PANGO_PIXELS (last_y) - PANGO_PIXELS (first_y);
644 selection_y -= line_display->top_margin;
645 selection_height += line_display->top_margin;
648 at_last_line = pango_layout_iter_at_last_line (iter);
650 selection_height += line_display->bottom_margin;
654 if (selection_start_index < byte_offset &&
655 selection_end_index > line->length + byte_offset) /* All selected */
657 cairo_t *cr = text_renderer->cr;
660 gdk_cairo_set_source_rgba (cr, &selection);
662 x + line_display->left_margin, selection_y,
663 screen_width, selection_height);
667 text_renderer_set_state (text_renderer, SELECTED);
668 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
670 PANGO_SCALE * x + line_rect.x,
671 PANGO_SCALE * y + baseline);
675 if (line_display->pg_bg_color)
677 cairo_t *cr = text_renderer->cr;
681 gdk_cairo_set_source_color (cr, line_display->pg_bg_color);
683 x + line_display->left_margin, selection_y,
684 screen_width, selection_height);
690 text_renderer_set_state (text_renderer, NORMAL);
691 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
693 PANGO_SCALE * x + line_rect.x,
694 PANGO_SCALE * y + baseline);
696 /* Check if some part of the line is selected; the newline
697 * that is after line->length for the last line of the
698 * paragraph counts as part of the line for this
700 if ((selection_start_index < byte_offset + line->length ||
701 (selection_start_index == byte_offset + line->length && pango_layout_iter_at_last_line (iter))) &&
702 selection_end_index > byte_offset)
704 cairo_t *cr = text_renderer->cr;
705 cairo_region_t *clip_region = get_selected_clip (text_renderer, layout, line,
706 x + line_display->x_offset,
709 selection_start_index, selection_end_index);
712 gdk_cairo_region (cr, clip_region);
714 cairo_region_destroy (clip_region);
716 gdk_cairo_set_source_rgba (cr, &selection);
718 x + PANGO_PIXELS (line_rect.x),
720 PANGO_PIXELS (line_rect.width),
724 text_renderer_set_state (text_renderer, SELECTED);
725 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
727 PANGO_SCALE * x + line_rect.x,
728 PANGO_SCALE * y + baseline);
732 /* Paint in the ends of the line */
733 if (line_rect.x > line_display->left_margin * PANGO_SCALE &&
734 ((line_display->direction == GTK_TEXT_DIR_LTR && selection_start_index < byte_offset) ||
735 (line_display->direction == GTK_TEXT_DIR_RTL && selection_end_index > byte_offset + line->length)))
739 gdk_cairo_set_source_rgba (cr, &selection);
741 x + line_display->left_margin,
743 PANGO_PIXELS (line_rect.x) - line_display->left_margin,
750 if (line_rect.x + line_rect.width <
751 (screen_width + line_display->left_margin) * PANGO_SCALE &&
752 ((line_display->direction == GTK_TEXT_DIR_LTR && selection_end_index > byte_offset + line->length) ||
753 (line_display->direction == GTK_TEXT_DIR_RTL && selection_start_index < byte_offset)))
758 line_display->left_margin + screen_width -
759 PANGO_PIXELS (line_rect.x) - PANGO_PIXELS (line_rect.width);
763 gdk_cairo_set_source_rgba (cr, &selection);
765 x + PANGO_PIXELS (line_rect.x) + PANGO_PIXELS (line_rect.width),
774 else if (line_display->has_block_cursor &&
775 gtk_widget_has_focus (text_renderer->widget) &&
776 byte_offset <= line_display->insert_index &&
777 (line_display->insert_index < byte_offset + line->length ||
778 (at_last_line && line_display->insert_index == byte_offset + line->length)))
780 GdkRectangle cursor_rect;
781 GdkColor cursor_color;
782 cairo_t *cr = text_renderer->cr;
784 /* we draw text using base color on filled cursor rectangle of cursor color
785 * (normally white on black) */
786 _gtk_widget_get_cursor_color (text_renderer->widget, &cursor_color);
788 cursor_rect.x = x + line_display->x_offset + line_display->block_cursor.x;
789 cursor_rect.y = y + line_display->block_cursor.y + line_display->top_margin;
790 cursor_rect.width = line_display->block_cursor.width;
791 cursor_rect.height = line_display->block_cursor.height;
795 gdk_cairo_rectangle (cr, &cursor_rect);
798 gdk_cairo_set_source_color (cr, &cursor_color);
801 /* draw text under the cursor if any */
802 if (!line_display->cursor_at_line_end)
806 state = gtk_widget_get_state_flags (text_renderer->widget);
807 gtk_style_context_get_background_color (context, state, &color);
809 gdk_cairo_set_source_rgba (cr, &color);
811 text_renderer_set_state (text_renderer, CURSOR);
813 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
815 PANGO_SCALE * x + line_rect.x,
816 PANGO_SCALE * y + baseline);
823 byte_offset += line->length;
825 while (pango_layout_iter_next_line (iter));
827 pango_layout_iter_free (iter);
830 static GtkTextRenderer *
831 get_text_renderer (void)
833 static GtkTextRenderer *text_renderer = NULL;
836 text_renderer = g_object_new (GTK_TYPE_TEXT_RENDERER, NULL);
838 return text_renderer;
842 gtk_text_layout_draw (GtkTextLayout *layout,
849 GtkTextRenderer *text_renderer;
850 GtkTextIter selection_start, selection_end;
851 gboolean have_selection = FALSE;
857 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
858 g_return_if_fail (layout->default_style != NULL);
859 g_return_if_fail (layout->buffer != NULL);
860 g_return_if_fail (cr != NULL);
862 if (!gdk_cairo_get_clip_rectangle (cr, &clip))
865 line_list = gtk_text_layout_get_lines (layout, clip.y, clip.y + clip.height, ¤t_y);
867 if (line_list == NULL)
868 return; /* nothing on the screen */
870 text_renderer = get_text_renderer ();
871 text_renderer_begin (text_renderer, widget, cr);
873 gtk_text_layout_wrap_loop_start (layout);
875 if (gtk_text_buffer_get_selection_bounds (layout->buffer,
878 have_selection = TRUE;
880 tmp_list = line_list;
881 while (tmp_list != NULL)
883 GtkTextLineDisplay *line_display;
884 gint selection_start_index = -1;
885 gint selection_end_index = -1;
886 gboolean have_strong;
889 GtkTextLine *line = tmp_list->data;
891 line_display = gtk_text_layout_get_line_display (layout, line, FALSE);
893 if (line_display->height > 0)
895 g_assert (line_display->layout != NULL);
899 GtkTextIter line_start, line_end;
902 gtk_text_layout_get_iter_at_line (layout,
905 line_end = line_start;
906 if (!gtk_text_iter_ends_line (&line_end))
907 gtk_text_iter_forward_to_line_end (&line_end);
908 byte_count = gtk_text_iter_get_visible_line_index (&line_end);
910 if (gtk_text_iter_compare (&selection_start, &line_end) <= 0 &&
911 gtk_text_iter_compare (&selection_end, &line_start) >= 0)
913 if (gtk_text_iter_compare (&selection_start, &line_start) >= 0)
914 selection_start_index = gtk_text_iter_get_visible_line_index (&selection_start);
916 selection_start_index = -1;
918 if (gtk_text_iter_compare (&selection_end, &line_end) <= 0)
919 selection_end_index = gtk_text_iter_get_visible_line_index (&selection_end);
921 selection_end_index = byte_count + 1; /* + 1 to flag past-the-end */
925 render_para (text_renderer, line_display,
927 selection_start_index, selection_end_index);
929 /* We paint the cursors last, because they overlap another chunk
930 and need to appear on top. */
935 cursor_list = line_display->cursors;
938 GtkTextCursorDisplay *cursor = cursor_list->data;
939 if (cursor->is_strong)
944 cursor_list = cursor_list->next;
947 cursor_list = line_display->cursors;
950 GtkTextCursorDisplay *cursor = cursor_list->data;
951 GtkTextDirection dir;
952 GdkRectangle cursor_location;
954 dir = line_display->direction;
955 if (have_strong && have_weak)
957 if (!cursor->is_strong)
958 dir = (dir == GTK_TEXT_DIR_RTL) ? GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
961 cursor_location.x = line_display->x_offset + cursor->x;
962 cursor_location.y = current_y + line_display->top_margin + cursor->y;
963 cursor_location.width = 0;
964 cursor_location.height = cursor->height;
966 gtk_draw_insertion_cursor (widget, cr, &cursor_location,
968 dir, have_strong && have_weak);
970 cursor_list = cursor_list->next;
972 } /* line_display->height > 0 */
974 current_y += line_display->height;
975 gtk_text_layout_free_line_display (layout, line_display);
977 tmp_list = g_slist_next (tmp_list);
980 gtk_text_layout_wrap_loop_end (layout);
982 tmp_widgets = text_renderer_end (text_renderer);
984 *widgets = tmp_widgets;
987 g_list_foreach (tmp_widgets, (GFunc)g_object_unref, NULL);
988 g_list_free (tmp_widgets);
991 g_slist_free (line_list);