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"
80 #include "gtkwidgetprivate.h"
83 /* DO NOT go putting private headers in here. This file should only
84 * use the semi-public headers, as with gtktextview.c.
87 #define GTK_TYPE_TEXT_RENDERER (_gtk_text_renderer_get_type())
88 #define GTK_TEXT_RENDERER(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GTK_TYPE_TEXT_RENDERER, GtkTextRenderer))
89 #define GTK_IS_TEXT_RENDERER(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GTK_TYPE_TEXT_RENDERER))
90 #define GTK_TEXT_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_TEXT_RENDERER, GtkTextRendererClass))
91 #define GTK_IS_TEXT_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_TEXT_RENDERER))
92 #define GTK_TEXT_RENDERER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_TEXT_RENDERER, GtkTextRendererClass))
94 typedef struct _GtkTextRenderer GtkTextRenderer;
95 typedef struct _GtkTextRendererClass GtkTextRendererClass;
103 struct _GtkTextRenderer
105 PangoRenderer parent_instance;
110 GdkColor *error_color; /* Error underline color for this widget */
111 GList *widgets; /* widgets encountered when drawing */
116 struct _GtkTextRendererClass
118 PangoRendererClass parent_class;
121 G_DEFINE_TYPE (GtkTextRenderer, _gtk_text_renderer, PANGO_TYPE_RENDERER)
124 text_renderer_set_gdk_color (GtkTextRenderer *text_renderer,
125 PangoRenderPart part,
128 PangoRenderer *renderer = PANGO_RENDERER (text_renderer);
134 color.red = gdk_color->red;
135 color.green = gdk_color->green;
136 color.blue = gdk_color->blue;
138 pango_renderer_set_color (renderer, part, &color);
141 pango_renderer_set_color (renderer, part, NULL);
145 text_renderer_set_rgba (GtkTextRenderer *text_renderer,
146 PangoRenderPart part,
149 PangoRenderer *renderer = PANGO_RENDERER (text_renderer);
155 color.red = CLAMP (rgba->red * 65535. + 0.5, 0, 65535);
156 color.green = CLAMP (rgba->green * 65535. + 0.5, 0, 65535);
157 color.blue = CLAMP (rgba->blue * 65535. + 0.5, 0, 65535);
159 pango_renderer_set_color (renderer, part, &color);
162 pango_renderer_set_color (renderer, part, NULL);
165 static GtkTextAppearance *
166 get_item_appearance (PangoItem *item)
168 GSList *tmp_list = item->analysis.extra_attrs;
172 PangoAttribute *attr = tmp_list->data;
174 if (attr->klass->type == gtk_text_attr_appearance_type)
175 return &((GtkTextAttrAppearance *)attr)->appearance;
177 tmp_list = tmp_list->next;
184 gtk_text_renderer_prepare_run (PangoRenderer *renderer,
187 GtkStyleContext *context;
189 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
190 GdkColor *bg_color = NULL;
191 GdkRGBA *fg_rgba = NULL;
192 GdkColor *fg_color = NULL;
193 GtkTextAppearance *appearance;
195 PANGO_RENDERER_CLASS (_gtk_text_renderer_parent_class)->prepare_run (renderer, run);
197 appearance = get_item_appearance (run->item);
198 g_assert (appearance != NULL);
200 context = gtk_widget_get_style_context (text_renderer->widget);
202 state = gtk_widget_get_state_flags (text_renderer->widget);
204 if (appearance->draw_bg && text_renderer->state == NORMAL)
205 bg_color = &appearance->bg_color;
209 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_BACKGROUND, bg_color);
211 if (text_renderer->state == SELECTED)
213 state |= GTK_STATE_FLAG_SELECTED;
215 gtk_style_context_get (context, state,
219 else if (text_renderer->state == CURSOR && gtk_widget_has_focus (text_renderer->widget))
221 gtk_style_context_get (context, state,
222 "background-color", &fg_rgba,
226 fg_color = &appearance->fg_color;
230 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_FOREGROUND, fg_rgba);
231 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_STRIKETHROUGH,fg_rgba);
235 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_FOREGROUND, fg_color);
236 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_STRIKETHROUGH, fg_color);
239 if (appearance->underline == PANGO_UNDERLINE_ERROR)
241 if (!text_renderer->error_color)
243 gtk_style_context_get_style (context,
244 "error-underline-color", &text_renderer->error_color,
247 if (!text_renderer->error_color)
249 static const GdkColor red = { 0, 0xffff, 0, 0 };
250 text_renderer->error_color = gdk_color_copy (&red);
254 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_UNDERLINE, text_renderer->error_color);
257 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_UNDERLINE, fg_rgba);
259 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_UNDERLINE, fg_color);
263 set_color (GtkTextRenderer *text_renderer,
264 PangoRenderPart part)
268 cairo_save (text_renderer->cr);
270 color = pango_renderer_get_color (PANGO_RENDERER (text_renderer), part);
272 cairo_set_source_rgb (text_renderer->cr,
274 color->green / 65535.,
275 color->blue / 65535.);
279 unset_color (GtkTextRenderer *text_renderer)
281 cairo_restore (text_renderer->cr);
285 gtk_text_renderer_draw_glyphs (PangoRenderer *renderer,
287 PangoGlyphString *glyphs,
291 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
293 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
295 cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
296 pango_cairo_show_glyph_string (text_renderer->cr, font, glyphs);
298 unset_color (text_renderer);
302 gtk_text_renderer_draw_glyph_item (PangoRenderer *renderer,
304 PangoGlyphItem *glyph_item,
308 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
310 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
312 cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
313 pango_cairo_show_glyph_item (text_renderer->cr, text, glyph_item);
315 unset_color (text_renderer);
319 gtk_text_renderer_draw_rectangle (PangoRenderer *renderer,
320 PangoRenderPart part,
326 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
328 set_color (text_renderer, part);
330 cairo_rectangle (text_renderer->cr,
331 (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
332 (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
333 cairo_fill (text_renderer->cr);
335 unset_color (text_renderer);
339 gtk_text_renderer_draw_trapezoid (PangoRenderer *renderer,
340 PangoRenderPart part,
348 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
350 cairo_matrix_t matrix;
352 set_color (text_renderer, part);
354 cr = text_renderer->cr;
356 cairo_get_matrix (cr, &matrix);
357 matrix.xx = matrix.yy = 1.0;
358 matrix.xy = matrix.yx = 0.0;
359 cairo_set_matrix (cr, &matrix);
361 cairo_move_to (cr, x11, y1_);
362 cairo_line_to (cr, x21, y1_);
363 cairo_line_to (cr, x22, y2);
364 cairo_line_to (cr, x12, y2);
365 cairo_close_path (cr);
369 unset_color (text_renderer);
373 gtk_text_renderer_draw_error_underline (PangoRenderer *renderer,
379 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
381 set_color (text_renderer, PANGO_RENDER_PART_UNDERLINE);
383 pango_cairo_show_error_underline (text_renderer->cr,
384 (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
385 (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
387 unset_color (text_renderer);
391 gtk_text_renderer_draw_shape (PangoRenderer *renderer,
392 PangoAttrShape *attr,
396 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
398 if (attr->data == NULL)
400 /* This happens if we have an empty widget anchor. Draw
401 * something empty-looking.
403 GdkRectangle shape_rect;
406 shape_rect.x = PANGO_PIXELS (x);
407 shape_rect.y = PANGO_PIXELS (y + attr->logical_rect.y);
408 shape_rect.width = PANGO_PIXELS (x + attr->logical_rect.width) - shape_rect.x;
409 shape_rect.height = PANGO_PIXELS (y + attr->logical_rect.y + attr->logical_rect.height) - shape_rect.y;
411 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
413 cr = text_renderer->cr;
415 cairo_set_line_width (cr, 1.0);
418 shape_rect.x + 0.5, shape_rect.y + 0.5,
419 shape_rect.width - 1, shape_rect.height - 1);
420 cairo_move_to (cr, shape_rect.x + 0.5, shape_rect.y + 0.5);
422 shape_rect.x + shape_rect.width - 0.5,
423 shape_rect.y + shape_rect.height - 0.5);
424 cairo_move_to (cr, shape_rect.x + 0.5,
425 shape_rect.y + shape_rect.height - 0.5);
426 cairo_line_to (cr, shape_rect.x + shape_rect.width - 0.5,
431 unset_color (text_renderer);
433 else if (GDK_IS_PIXBUF (attr->data))
435 cairo_t *cr = text_renderer->cr;
436 GdkPixbuf *pixbuf = GDK_PIXBUF (attr->data);
440 gdk_cairo_set_source_pixbuf (cr, pixbuf,
442 PANGO_PIXELS (y) - gdk_pixbuf_get_height (pixbuf));
447 else if (GTK_IS_WIDGET (attr->data))
451 widget = GTK_WIDGET (attr->data);
453 text_renderer->widgets = g_list_prepend (text_renderer->widgets,
454 g_object_ref (widget));
457 g_assert_not_reached (); /* not a pixbuf or widget */
461 gtk_text_renderer_finalize (GObject *object)
463 G_OBJECT_CLASS (_gtk_text_renderer_parent_class)->finalize (object);
467 _gtk_text_renderer_init (GtkTextRenderer *renderer)
472 _gtk_text_renderer_class_init (GtkTextRendererClass *klass)
474 GObjectClass *object_class = G_OBJECT_CLASS (klass);
476 PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass);
478 renderer_class->prepare_run = gtk_text_renderer_prepare_run;
479 renderer_class->draw_glyphs = gtk_text_renderer_draw_glyphs;
480 renderer_class->draw_glyph_item = gtk_text_renderer_draw_glyph_item;
481 renderer_class->draw_rectangle = gtk_text_renderer_draw_rectangle;
482 renderer_class->draw_trapezoid = gtk_text_renderer_draw_trapezoid;
483 renderer_class->draw_error_underline = gtk_text_renderer_draw_error_underline;
484 renderer_class->draw_shape = gtk_text_renderer_draw_shape;
486 object_class->finalize = gtk_text_renderer_finalize;
490 text_renderer_set_state (GtkTextRenderer *text_renderer,
493 text_renderer->state = state;
497 text_renderer_begin (GtkTextRenderer *text_renderer,
501 GtkStyleContext *context;
505 text_renderer->widget = widget;
506 text_renderer->cr = cr;
508 context = gtk_widget_get_style_context (widget);
510 gtk_style_context_save (context);
511 gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW);
513 state = gtk_widget_get_state_flags (widget);
514 gtk_style_context_get_color (context, state, &color);
518 gdk_cairo_set_source_rgba (cr, &color);
521 /* Returns a GSList of (referenced) widgets encountered while drawing.
524 text_renderer_end (GtkTextRenderer *text_renderer)
526 GtkStyleContext *context;
527 GList *widgets = text_renderer->widgets;
529 cairo_restore (text_renderer->cr);
531 context = gtk_widget_get_style_context (text_renderer->widget);
533 gtk_style_context_restore (context);
535 text_renderer->widget = NULL;
536 text_renderer->cr = NULL;
538 text_renderer->widgets = NULL;
540 if (text_renderer->error_color)
542 gdk_color_free (text_renderer->error_color);
543 text_renderer->error_color = NULL;
549 static cairo_region_t *
550 get_selected_clip (GtkTextRenderer *text_renderer,
552 PangoLayoutLine *line,
561 cairo_region_t *clip_region = cairo_region_create ();
563 pango_layout_line_get_x_ranges (line, start_index, end_index, &ranges, &n_ranges);
565 for (i=0; i < n_ranges; i++)
569 rect.x = x + PANGO_PIXELS (ranges[2*i]);
571 rect.width = PANGO_PIXELS (ranges[2*i + 1]) - PANGO_PIXELS (ranges[2*i]);
572 rect.height = height;
574 cairo_region_union_rectangle (clip_region, &rect);
582 render_para (GtkTextRenderer *text_renderer,
583 GtkTextLineDisplay *line_display,
584 /* Top-left corner of paragraph including all margins */
587 int selection_start_index,
588 int selection_end_index)
590 GtkStyleContext *context;
592 PangoLayout *layout = line_display->layout;
594 PangoLayoutIter *iter;
595 PangoRectangle layout_logical;
598 gboolean first = TRUE;
600 iter = pango_layout_get_iter (layout);
602 pango_layout_iter_get_layout_extents (iter, NULL, &layout_logical);
604 /* Adjust for margins */
606 layout_logical.x += line_display->x_offset * PANGO_SCALE;
607 layout_logical.y += line_display->top_margin * PANGO_SCALE;
609 screen_width = line_display->total_width;
611 context = gtk_widget_get_style_context (text_renderer->widget);
613 state = GTK_STATE_FLAG_SELECTED;
614 if (gtk_widget_has_focus (text_renderer->widget))
615 state |= GTK_STATE_FLAG_FOCUSED;
617 gtk_style_context_get_background_color (context, state, &selection);
621 PangoLayoutLine *line = pango_layout_iter_get_line_readonly (iter);
622 int selection_y, selection_height;
624 PangoRectangle line_rect;
626 gboolean at_last_line;
628 pango_layout_iter_get_line_extents (iter, NULL, &line_rect);
629 baseline = pango_layout_iter_get_baseline (iter);
630 pango_layout_iter_get_line_yrange (iter, &first_y, &last_y);
632 /* Adjust for margins */
634 line_rect.x += line_display->x_offset * PANGO_SCALE;
635 line_rect.y += line_display->top_margin * PANGO_SCALE;
636 baseline += line_display->top_margin * PANGO_SCALE;
638 /* Selection is the height of the line, plus top/bottom
639 * margin if we're the first/last line
641 selection_y = y + PANGO_PIXELS (first_y) + line_display->top_margin;
642 selection_height = PANGO_PIXELS (last_y) - PANGO_PIXELS (first_y);
646 selection_y -= line_display->top_margin;
647 selection_height += line_display->top_margin;
650 at_last_line = pango_layout_iter_at_last_line (iter);
652 selection_height += line_display->bottom_margin;
656 if (selection_start_index < byte_offset &&
657 selection_end_index > line->length + byte_offset) /* All selected */
659 cairo_t *cr = text_renderer->cr;
662 gdk_cairo_set_source_rgba (cr, &selection);
664 x + line_display->left_margin, selection_y,
665 screen_width, selection_height);
669 text_renderer_set_state (text_renderer, SELECTED);
670 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
672 PANGO_SCALE * x + line_rect.x,
673 PANGO_SCALE * y + baseline);
677 if (line_display->pg_bg_color)
679 cairo_t *cr = text_renderer->cr;
683 gdk_cairo_set_source_color (cr, line_display->pg_bg_color);
685 x + line_display->left_margin, selection_y,
686 screen_width, selection_height);
692 text_renderer_set_state (text_renderer, NORMAL);
693 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
695 PANGO_SCALE * x + line_rect.x,
696 PANGO_SCALE * y + baseline);
698 /* Check if some part of the line is selected; the newline
699 * that is after line->length for the last line of the
700 * paragraph counts as part of the line for this
702 if ((selection_start_index < byte_offset + line->length ||
703 (selection_start_index == byte_offset + line->length && pango_layout_iter_at_last_line (iter))) &&
704 selection_end_index > byte_offset)
706 cairo_t *cr = text_renderer->cr;
707 cairo_region_t *clip_region = get_selected_clip (text_renderer, layout, line,
708 x + line_display->x_offset,
711 selection_start_index, selection_end_index);
714 gdk_cairo_region (cr, clip_region);
716 cairo_region_destroy (clip_region);
718 gdk_cairo_set_source_rgba (cr, &selection);
720 x + PANGO_PIXELS (line_rect.x),
722 PANGO_PIXELS (line_rect.width),
726 text_renderer_set_state (text_renderer, SELECTED);
727 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
729 PANGO_SCALE * x + line_rect.x,
730 PANGO_SCALE * y + baseline);
734 /* Paint in the ends of the line */
735 if (line_rect.x > line_display->left_margin * PANGO_SCALE &&
736 ((line_display->direction == GTK_TEXT_DIR_LTR && selection_start_index < byte_offset) ||
737 (line_display->direction == GTK_TEXT_DIR_RTL && selection_end_index > byte_offset + line->length)))
741 gdk_cairo_set_source_rgba (cr, &selection);
743 x + line_display->left_margin,
745 PANGO_PIXELS (line_rect.x) - line_display->left_margin,
752 if (line_rect.x + line_rect.width <
753 (screen_width + line_display->left_margin) * PANGO_SCALE &&
754 ((line_display->direction == GTK_TEXT_DIR_LTR && selection_end_index > byte_offset + line->length) ||
755 (line_display->direction == GTK_TEXT_DIR_RTL && selection_start_index < byte_offset)))
760 line_display->left_margin + screen_width -
761 PANGO_PIXELS (line_rect.x) - PANGO_PIXELS (line_rect.width);
765 gdk_cairo_set_source_rgba (cr, &selection);
767 x + PANGO_PIXELS (line_rect.x) + PANGO_PIXELS (line_rect.width),
776 else if (line_display->has_block_cursor &&
777 gtk_widget_has_focus (text_renderer->widget) &&
778 byte_offset <= line_display->insert_index &&
779 (line_display->insert_index < byte_offset + line->length ||
780 (at_last_line && line_display->insert_index == byte_offset + line->length)))
782 GdkRectangle cursor_rect;
783 GdkColor cursor_color;
784 cairo_t *cr = text_renderer->cr;
786 /* we draw text using base color on filled cursor rectangle of cursor color
787 * (normally white on black) */
788 _gtk_widget_get_cursor_color (text_renderer->widget, &cursor_color);
790 cursor_rect.x = x + line_display->x_offset + line_display->block_cursor.x;
791 cursor_rect.y = y + line_display->block_cursor.y + line_display->top_margin;
792 cursor_rect.width = line_display->block_cursor.width;
793 cursor_rect.height = line_display->block_cursor.height;
797 gdk_cairo_rectangle (cr, &cursor_rect);
800 gdk_cairo_set_source_color (cr, &cursor_color);
803 /* draw text under the cursor if any */
804 if (!line_display->cursor_at_line_end)
808 state = gtk_widget_get_state_flags (text_renderer->widget);
809 gtk_style_context_get_background_color (context, state, &color);
811 gdk_cairo_set_source_rgba (cr, &color);
813 text_renderer_set_state (text_renderer, CURSOR);
815 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
817 PANGO_SCALE * x + line_rect.x,
818 PANGO_SCALE * y + baseline);
825 byte_offset += line->length;
827 while (pango_layout_iter_next_line (iter));
829 pango_layout_iter_free (iter);
832 static GtkTextRenderer *
833 get_text_renderer (void)
835 static GtkTextRenderer *text_renderer = NULL;
838 text_renderer = g_object_new (GTK_TYPE_TEXT_RENDERER, NULL);
840 return text_renderer;
844 gtk_text_layout_draw (GtkTextLayout *layout,
851 GtkTextRenderer *text_renderer;
852 GtkTextIter selection_start, selection_end;
853 gboolean have_selection = FALSE;
859 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
860 g_return_if_fail (layout->default_style != NULL);
861 g_return_if_fail (layout->buffer != NULL);
862 g_return_if_fail (cr != NULL);
864 if (!gdk_cairo_get_clip_rectangle (cr, &clip))
867 line_list = gtk_text_layout_get_lines (layout, clip.y, clip.y + clip.height, ¤t_y);
869 if (line_list == NULL)
870 return; /* nothing on the screen */
872 text_renderer = get_text_renderer ();
873 text_renderer_begin (text_renderer, widget, cr);
875 gtk_text_layout_wrap_loop_start (layout);
877 if (gtk_text_buffer_get_selection_bounds (layout->buffer,
880 have_selection = TRUE;
882 tmp_list = line_list;
883 while (tmp_list != NULL)
885 GtkTextLineDisplay *line_display;
886 gint selection_start_index = -1;
887 gint selection_end_index = -1;
888 gboolean have_strong;
891 GtkTextLine *line = tmp_list->data;
893 line_display = gtk_text_layout_get_line_display (layout, line, FALSE);
895 if (line_display->height > 0)
897 g_assert (line_display->layout != NULL);
901 GtkTextIter line_start, line_end;
904 gtk_text_layout_get_iter_at_line (layout,
907 line_end = line_start;
908 if (!gtk_text_iter_ends_line (&line_end))
909 gtk_text_iter_forward_to_line_end (&line_end);
910 byte_count = gtk_text_iter_get_visible_line_index (&line_end);
912 if (gtk_text_iter_compare (&selection_start, &line_end) <= 0 &&
913 gtk_text_iter_compare (&selection_end, &line_start) >= 0)
915 if (gtk_text_iter_compare (&selection_start, &line_start) >= 0)
916 selection_start_index = gtk_text_iter_get_visible_line_index (&selection_start);
918 selection_start_index = -1;
920 if (gtk_text_iter_compare (&selection_end, &line_end) <= 0)
921 selection_end_index = gtk_text_iter_get_visible_line_index (&selection_end);
923 selection_end_index = byte_count + 1; /* + 1 to flag past-the-end */
927 render_para (text_renderer, line_display,
929 selection_start_index, selection_end_index);
931 /* We paint the cursors last, because they overlap another chunk
932 and need to appear on top. */
937 cursor_list = line_display->cursors;
940 GtkTextCursorDisplay *cursor = cursor_list->data;
941 if (cursor->is_strong)
946 cursor_list = cursor_list->next;
949 cursor_list = line_display->cursors;
952 GtkTextCursorDisplay *cursor = cursor_list->data;
953 GtkTextDirection dir;
954 GdkRectangle cursor_location;
956 dir = line_display->direction;
957 if (have_strong && have_weak)
959 if (!cursor->is_strong)
960 dir = (dir == GTK_TEXT_DIR_RTL) ? GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
963 cursor_location.x = line_display->x_offset + cursor->x;
964 cursor_location.y = current_y + line_display->top_margin + cursor->y;
965 cursor_location.width = 0;
966 cursor_location.height = cursor->height;
968 gtk_draw_insertion_cursor (widget, cr, &cursor_location,
970 dir, have_strong && have_weak);
972 cursor_list = cursor_list->next;
974 } /* line_display->height > 0 */
976 current_y += line_display->height;
977 gtk_text_layout_free_line_display (layout, line_display);
979 tmp_list = g_slist_next (tmp_list);
982 gtk_text_layout_wrap_loop_end (layout);
984 tmp_widgets = text_renderer_end (text_renderer);
986 *widgets = tmp_widgets;
989 g_list_foreach (tmp_widgets, (GFunc)g_object_unref, NULL);
990 g_list_free (tmp_widgets);
993 g_slist_free (line_list);