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, see <http://www.gnu.org/licenses/>.Free
26 * Original Tk license:
28 * This software is copyrighted by the Regents of the University of
29 * California, Sun Microsystems, Inc., and other parties. The
30 * following terms apply to all files associated with the software
31 * unless explicitly disclaimed in individual files.
33 * The authors hereby grant permission to use, copy, modify,
34 * distribute, and license this software and its documentation for any
35 * purpose, provided that existing copyright notices are retained in
36 * all copies and that this notice is included verbatim in any
37 * distributions. No written agreement, license, or royalty fee is
38 * required for any of the authorized uses. Modifications to this
39 * software may be copyrighted by their authors and need not follow
40 * the licensing terms described here, provided that the new terms are
41 * clearly indicated on the first page of each file where they apply.
43 * IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
44 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
45 * DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
46 * OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
49 * THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
50 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
51 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
52 * NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
53 * AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
54 * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
56 * GOVERNMENT USE: If you are acquiring this software on behalf of the
57 * U.S. government, the Government shall have only "Restricted Rights"
58 * in the software and related documentation as defined in the Federal
59 * Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
60 * are acquiring the software on behalf of the Department of Defense,
61 * the software shall be classified as "Commercial Computer Software"
62 * and the Government shall have only "Restricted Rights" as defined
63 * in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
64 * foregoing, the authors grant the U.S. Government and others acting
65 * in its behalf permission to use and distribute the software in
66 * accordance with the terms specified in this license.
70 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
71 * file for a list of people on the GTK+ Team. See the ChangeLog
72 * files for a list of changes. These files are distributed with
73 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
76 #define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
78 #include "gtktextdisplay.h"
79 #include "gtkwidgetprivate.h"
80 #include "gtkstylecontextprivate.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 GdkRGBA *error_color; /* Error underline color for this widget */
111 GList *widgets; /* widgets encountered when drawing */
119 struct _GtkTextRendererClass
121 PangoRendererClass parent_class;
124 G_DEFINE_TYPE (GtkTextRenderer, _gtk_text_renderer, PANGO_TYPE_RENDERER)
127 text_renderer_set_rgba (GtkTextRenderer *text_renderer,
128 PangoRenderPart part,
131 PangoRenderer *renderer = PANGO_RENDERER (text_renderer);
132 PangoColor dummy = { 0, };
136 text_renderer->rgba[part] = *rgba;
137 pango_renderer_set_color (renderer, part, &dummy);
140 pango_renderer_set_color (renderer, part, NULL);
142 text_renderer->rgba_set[part] = (rgba != NULL);
145 static GtkTextAppearance *
146 get_item_appearance (PangoItem *item)
148 GSList *tmp_list = item->analysis.extra_attrs;
152 PangoAttribute *attr = tmp_list->data;
154 if (attr->klass->type == gtk_text_attr_appearance_type)
155 return &((GtkTextAttrAppearance *)attr)->appearance;
157 tmp_list = tmp_list->next;
164 gtk_text_renderer_prepare_run (PangoRenderer *renderer,
167 GtkStyleContext *context;
169 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
170 GdkRGBA *bg_rgba = NULL;
171 GdkRGBA *fg_rgba = NULL;
172 GtkTextAppearance *appearance;
174 PANGO_RENDERER_CLASS (_gtk_text_renderer_parent_class)->prepare_run (renderer, run);
176 appearance = get_item_appearance (run->item);
177 g_assert (appearance != NULL);
179 context = gtk_widget_get_style_context (text_renderer->widget);
180 state = gtk_widget_get_state_flags (text_renderer->widget);
182 if (appearance->draw_bg && text_renderer->state == NORMAL)
183 bg_rgba = appearance->rgba[0];
187 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_BACKGROUND, bg_rgba);
189 if (text_renderer->state == SELECTED)
191 state |= GTK_STATE_FLAG_SELECTED;
193 gtk_style_context_get (context, state, "color", &fg_rgba, NULL);
195 else if (text_renderer->state == CURSOR && gtk_widget_has_focus (text_renderer->widget))
197 gtk_style_context_get (context, state,
198 "background-color", &fg_rgba,
202 fg_rgba = appearance->rgba[1];
204 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_FOREGROUND, fg_rgba);
205 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_STRIKETHROUGH, fg_rgba);
207 if (appearance->underline == PANGO_UNDERLINE_ERROR)
209 if (!text_renderer->error_color)
211 GdkColor *color = NULL;
213 gtk_style_context_get_style (context,
214 "error-underline-color", &color,
221 rgba.red = color->red / 65535.;
222 rgba.green = color->green / 65535.;
223 rgba.blue = color->blue / 65535.;
225 gdk_color_free (color);
227 text_renderer->error_color = gdk_rgba_copy (&rgba);
231 static const GdkRGBA red = { 1, 0, 0, 1 };
232 text_renderer->error_color = gdk_rgba_copy (&red);
236 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_UNDERLINE, text_renderer->error_color);
239 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_UNDERLINE, fg_rgba);
241 if (fg_rgba != appearance->rgba[1])
242 gdk_rgba_free (fg_rgba);
246 set_color (GtkTextRenderer *text_renderer,
247 PangoRenderPart part)
249 cairo_save (text_renderer->cr);
251 if (text_renderer->rgba_set[part])
252 gdk_cairo_set_source_rgba (text_renderer->cr, &text_renderer->rgba[part]);
256 unset_color (GtkTextRenderer *text_renderer)
258 cairo_restore (text_renderer->cr);
262 gtk_text_renderer_draw_glyphs (PangoRenderer *renderer,
264 PangoGlyphString *glyphs,
268 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
270 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
272 cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
273 pango_cairo_show_glyph_string (text_renderer->cr, font, glyphs);
275 unset_color (text_renderer);
279 gtk_text_renderer_draw_glyph_item (PangoRenderer *renderer,
281 PangoGlyphItem *glyph_item,
285 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
287 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
289 cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
290 pango_cairo_show_glyph_item (text_renderer->cr, text, glyph_item);
292 unset_color (text_renderer);
296 gtk_text_renderer_draw_rectangle (PangoRenderer *renderer,
297 PangoRenderPart part,
303 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
305 set_color (text_renderer, part);
307 cairo_rectangle (text_renderer->cr,
308 (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
309 (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
310 cairo_fill (text_renderer->cr);
312 unset_color (text_renderer);
316 gtk_text_renderer_draw_trapezoid (PangoRenderer *renderer,
317 PangoRenderPart part,
325 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
327 cairo_matrix_t matrix;
329 set_color (text_renderer, part);
331 cr = text_renderer->cr;
333 cairo_get_matrix (cr, &matrix);
334 matrix.xx = matrix.yy = 1.0;
335 matrix.xy = matrix.yx = 0.0;
336 cairo_set_matrix (cr, &matrix);
338 cairo_move_to (cr, x11, y1_);
339 cairo_line_to (cr, x21, y1_);
340 cairo_line_to (cr, x22, y2);
341 cairo_line_to (cr, x12, y2);
342 cairo_close_path (cr);
346 unset_color (text_renderer);
350 gtk_text_renderer_draw_error_underline (PangoRenderer *renderer,
356 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
358 set_color (text_renderer, PANGO_RENDER_PART_UNDERLINE);
360 pango_cairo_show_error_underline (text_renderer->cr,
361 (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
362 (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
364 unset_color (text_renderer);
368 gtk_text_renderer_draw_shape (PangoRenderer *renderer,
369 PangoAttrShape *attr,
373 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
375 if (attr->data == NULL)
377 /* This happens if we have an empty widget anchor. Draw
378 * something empty-looking.
380 GdkRectangle shape_rect;
383 shape_rect.x = PANGO_PIXELS (x);
384 shape_rect.y = PANGO_PIXELS (y + attr->logical_rect.y);
385 shape_rect.width = PANGO_PIXELS (x + attr->logical_rect.width) - shape_rect.x;
386 shape_rect.height = PANGO_PIXELS (y + attr->logical_rect.y + attr->logical_rect.height) - shape_rect.y;
388 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
390 cr = text_renderer->cr;
392 cairo_set_line_width (cr, 1.0);
395 shape_rect.x + 0.5, shape_rect.y + 0.5,
396 shape_rect.width - 1, shape_rect.height - 1);
397 cairo_move_to (cr, shape_rect.x + 0.5, shape_rect.y + 0.5);
399 shape_rect.x + shape_rect.width - 0.5,
400 shape_rect.y + shape_rect.height - 0.5);
401 cairo_move_to (cr, shape_rect.x + 0.5,
402 shape_rect.y + shape_rect.height - 0.5);
403 cairo_line_to (cr, shape_rect.x + shape_rect.width - 0.5,
408 unset_color (text_renderer);
410 else if (GDK_IS_PIXBUF (attr->data))
412 cairo_t *cr = text_renderer->cr;
413 GdkPixbuf *pixbuf = GDK_PIXBUF (attr->data);
417 gdk_cairo_set_source_pixbuf (cr, pixbuf,
419 PANGO_PIXELS (y) - gdk_pixbuf_get_height (pixbuf));
424 else if (GTK_IS_WIDGET (attr->data))
428 widget = GTK_WIDGET (attr->data);
430 text_renderer->widgets = g_list_prepend (text_renderer->widgets,
431 g_object_ref (widget));
434 g_assert_not_reached (); /* not a pixbuf or widget */
438 gtk_text_renderer_finalize (GObject *object)
440 G_OBJECT_CLASS (_gtk_text_renderer_parent_class)->finalize (object);
444 _gtk_text_renderer_init (GtkTextRenderer *renderer)
449 _gtk_text_renderer_class_init (GtkTextRendererClass *klass)
451 GObjectClass *object_class = G_OBJECT_CLASS (klass);
453 PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass);
455 renderer_class->prepare_run = gtk_text_renderer_prepare_run;
456 renderer_class->draw_glyphs = gtk_text_renderer_draw_glyphs;
457 renderer_class->draw_glyph_item = gtk_text_renderer_draw_glyph_item;
458 renderer_class->draw_rectangle = gtk_text_renderer_draw_rectangle;
459 renderer_class->draw_trapezoid = gtk_text_renderer_draw_trapezoid;
460 renderer_class->draw_error_underline = gtk_text_renderer_draw_error_underline;
461 renderer_class->draw_shape = gtk_text_renderer_draw_shape;
463 object_class->finalize = gtk_text_renderer_finalize;
467 text_renderer_set_state (GtkTextRenderer *text_renderer,
470 text_renderer->state = state;
474 text_renderer_begin (GtkTextRenderer *text_renderer,
478 GtkStyleContext *context;
482 text_renderer->widget = widget;
483 text_renderer->cr = cr;
485 context = gtk_widget_get_style_context (widget);
487 gtk_style_context_save (context);
488 gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW);
490 state = gtk_widget_get_state_flags (widget);
491 gtk_style_context_get_color (context, state, &color);
495 gdk_cairo_set_source_rgba (cr, &color);
498 /* Returns a GSList of (referenced) widgets encountered while drawing.
501 text_renderer_end (GtkTextRenderer *text_renderer)
503 GtkStyleContext *context;
504 GList *widgets = text_renderer->widgets;
506 cairo_restore (text_renderer->cr);
508 context = gtk_widget_get_style_context (text_renderer->widget);
510 gtk_style_context_restore (context);
512 text_renderer->widget = NULL;
513 text_renderer->cr = NULL;
515 text_renderer->widgets = NULL;
517 if (text_renderer->error_color)
519 gdk_rgba_free (text_renderer->error_color);
520 text_renderer->error_color = NULL;
526 static cairo_region_t *
527 get_selected_clip (GtkTextRenderer *text_renderer,
529 PangoLayoutLine *line,
538 cairo_region_t *clip_region = cairo_region_create ();
540 pango_layout_line_get_x_ranges (line, start_index, end_index, &ranges, &n_ranges);
542 for (i=0; i < n_ranges; i++)
546 rect.x = x + PANGO_PIXELS (ranges[2*i]);
548 rect.width = PANGO_PIXELS (ranges[2*i + 1]) - PANGO_PIXELS (ranges[2*i]);
549 rect.height = height;
551 cairo_region_union_rectangle (clip_region, &rect);
559 render_para (GtkTextRenderer *text_renderer,
560 GtkTextLineDisplay *line_display,
561 int selection_start_index,
562 int selection_end_index)
564 GtkStyleContext *context;
566 PangoLayout *layout = line_display->layout;
568 PangoLayoutIter *iter;
569 PangoRectangle layout_logical;
572 gboolean first = TRUE;
574 iter = pango_layout_get_iter (layout);
576 pango_layout_iter_get_layout_extents (iter, NULL, &layout_logical);
578 /* Adjust for margins */
580 layout_logical.x += line_display->x_offset * PANGO_SCALE;
581 layout_logical.y += line_display->top_margin * PANGO_SCALE;
583 screen_width = line_display->total_width;
585 context = gtk_widget_get_style_context (text_renderer->widget);
586 state = gtk_widget_get_state_flags (text_renderer->widget);
588 state |= GTK_STATE_FLAG_SELECTED;
590 gtk_style_context_get_background_color (context, state, &selection);
594 PangoLayoutLine *line = pango_layout_iter_get_line_readonly (iter);
595 int selection_y, selection_height;
597 PangoRectangle line_rect;
599 gboolean at_last_line;
601 pango_layout_iter_get_line_extents (iter, NULL, &line_rect);
602 baseline = pango_layout_iter_get_baseline (iter);
603 pango_layout_iter_get_line_yrange (iter, &first_y, &last_y);
605 /* Adjust for margins */
607 line_rect.x += line_display->x_offset * PANGO_SCALE;
608 line_rect.y += line_display->top_margin * PANGO_SCALE;
609 baseline += line_display->top_margin * PANGO_SCALE;
611 /* Selection is the height of the line, plus top/bottom
612 * margin if we're the first/last line
614 selection_y = PANGO_PIXELS (first_y) + line_display->top_margin;
615 selection_height = PANGO_PIXELS (last_y) - PANGO_PIXELS (first_y);
619 selection_y -= line_display->top_margin;
620 selection_height += line_display->top_margin;
623 at_last_line = pango_layout_iter_at_last_line (iter);
625 selection_height += line_display->bottom_margin;
629 if (selection_start_index < byte_offset &&
630 selection_end_index > line->length + byte_offset) /* All selected */
632 cairo_t *cr = text_renderer->cr;
635 gdk_cairo_set_source_rgba (cr, &selection);
637 line_display->left_margin, selection_y,
638 screen_width, selection_height);
642 text_renderer_set_state (text_renderer, SELECTED);
643 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
650 if (line_display->pg_bg_rgba)
652 cairo_t *cr = text_renderer->cr;
656 gdk_cairo_set_source_rgba (text_renderer->cr, line_display->pg_bg_rgba);
658 line_display->left_margin, selection_y,
659 screen_width, selection_height);
665 text_renderer_set_state (text_renderer, NORMAL);
666 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
671 /* Check if some part of the line is selected; the newline
672 * that is after line->length for the last line of the
673 * paragraph counts as part of the line for this
675 if ((selection_start_index < byte_offset + line->length ||
676 (selection_start_index == byte_offset + line->length && pango_layout_iter_at_last_line (iter))) &&
677 selection_end_index > byte_offset)
679 cairo_t *cr = text_renderer->cr;
680 cairo_region_t *clip_region = get_selected_clip (text_renderer, layout, line,
681 line_display->x_offset,
684 selection_start_index, selection_end_index);
687 gdk_cairo_region (cr, clip_region);
689 cairo_region_destroy (clip_region);
691 gdk_cairo_set_source_rgba (cr, &selection);
693 PANGO_PIXELS (line_rect.x),
695 PANGO_PIXELS (line_rect.width),
699 text_renderer_set_state (text_renderer, SELECTED);
700 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
707 /* Paint in the ends of the line */
708 if (line_rect.x > line_display->left_margin * PANGO_SCALE &&
709 ((line_display->direction == GTK_TEXT_DIR_LTR && selection_start_index < byte_offset) ||
710 (line_display->direction == GTK_TEXT_DIR_RTL && selection_end_index > byte_offset + line->length)))
714 gdk_cairo_set_source_rgba (cr, &selection);
716 line_display->left_margin,
718 PANGO_PIXELS (line_rect.x) - line_display->left_margin,
725 if (line_rect.x + line_rect.width <
726 (screen_width + line_display->left_margin) * PANGO_SCALE &&
727 ((line_display->direction == GTK_TEXT_DIR_LTR && selection_end_index > byte_offset + line->length) ||
728 (line_display->direction == GTK_TEXT_DIR_RTL && selection_start_index < byte_offset)))
733 line_display->left_margin + screen_width -
734 PANGO_PIXELS (line_rect.x) - PANGO_PIXELS (line_rect.width);
738 gdk_cairo_set_source_rgba (cr, &selection);
740 PANGO_PIXELS (line_rect.x) + PANGO_PIXELS (line_rect.width),
749 else if (line_display->has_block_cursor &&
750 gtk_widget_has_focus (text_renderer->widget) &&
751 byte_offset <= line_display->insert_index &&
752 (line_display->insert_index < byte_offset + line->length ||
753 (at_last_line && line_display->insert_index == byte_offset + line->length)))
755 GdkRectangle cursor_rect;
756 GdkRGBA cursor_color;
757 cairo_t *cr = text_renderer->cr;
759 /* we draw text using base color on filled cursor rectangle of cursor color
760 * (normally white on black) */
761 _gtk_style_context_get_cursor_color (context, &cursor_color, NULL);
763 cursor_rect.x = line_display->x_offset + line_display->block_cursor.x;
764 cursor_rect.y = line_display->block_cursor.y + line_display->top_margin;
765 cursor_rect.width = line_display->block_cursor.width;
766 cursor_rect.height = line_display->block_cursor.height;
770 gdk_cairo_rectangle (cr, &cursor_rect);
773 gdk_cairo_set_source_rgba (cr, &cursor_color);
776 /* draw text under the cursor if any */
777 if (!line_display->cursor_at_line_end)
781 state = gtk_widget_get_state_flags (text_renderer->widget);
782 gtk_style_context_get_background_color (context, state, &color);
784 gdk_cairo_set_source_rgba (cr, &color);
786 text_renderer_set_state (text_renderer, CURSOR);
788 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
798 byte_offset += line->length;
800 while (pango_layout_iter_next_line (iter));
802 pango_layout_iter_free (iter);
805 static GtkTextRenderer *
806 get_text_renderer (void)
808 static GtkTextRenderer *text_renderer = NULL;
811 text_renderer = g_object_new (GTK_TYPE_TEXT_RENDERER, NULL);
813 return text_renderer;
817 gtk_text_layout_draw (GtkTextLayout *layout,
822 GtkStyleContext *context;
824 GtkTextRenderer *text_renderer;
825 GtkTextIter selection_start, selection_end;
826 gboolean have_selection;
832 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
833 g_return_if_fail (layout->default_style != NULL);
834 g_return_if_fail (layout->buffer != NULL);
835 g_return_if_fail (cr != NULL);
837 if (!gdk_cairo_get_clip_rectangle (cr, &clip))
840 context = gtk_widget_get_style_context (widget);
842 line_list = gtk_text_layout_get_lines (layout, clip.y, clip.y + clip.height, &offset_y);
844 if (line_list == NULL)
845 return; /* nothing on the screen */
847 text_renderer = get_text_renderer ();
848 text_renderer_begin (text_renderer, widget, cr);
850 /* text_renderer_begin/end does cairo_save/restore */
851 cairo_translate (cr, 0, offset_y);
853 gtk_text_layout_wrap_loop_start (layout);
855 have_selection = gtk_text_buffer_get_selection_bounds (layout->buffer,
859 tmp_list = line_list;
860 while (tmp_list != NULL)
862 GtkTextLineDisplay *line_display;
863 gint selection_start_index = -1;
864 gint selection_end_index = -1;
866 GtkTextLine *line = tmp_list->data;
868 line_display = gtk_text_layout_get_line_display (layout, line, FALSE);
870 if (line_display->height > 0)
872 g_assert (line_display->layout != NULL);
876 GtkTextIter line_start, line_end;
879 gtk_text_layout_get_iter_at_line (layout,
882 line_end = line_start;
883 if (!gtk_text_iter_ends_line (&line_end))
884 gtk_text_iter_forward_to_line_end (&line_end);
885 byte_count = gtk_text_iter_get_visible_line_index (&line_end);
887 if (gtk_text_iter_compare (&selection_start, &line_end) <= 0 &&
888 gtk_text_iter_compare (&selection_end, &line_start) >= 0)
890 if (gtk_text_iter_compare (&selection_start, &line_start) >= 0)
891 selection_start_index = gtk_text_iter_get_visible_line_index (&selection_start);
893 selection_start_index = -1;
895 if (gtk_text_iter_compare (&selection_end, &line_end) <= 0)
896 selection_end_index = gtk_text_iter_get_visible_line_index (&selection_end);
898 selection_end_index = byte_count + 1; /* + 1 to flag past-the-end */
902 render_para (text_renderer, line_display,
903 selection_start_index, selection_end_index);
905 /* We paint the cursors last, because they overlap another chunk
906 * and need to appear on top.
908 if (line_display->cursors != NULL)
912 for (i = 0; i < line_display->cursors->len; i++)
917 index = g_array_index(line_display->cursors, int, i);
918 dir = (line_display->direction == GTK_TEXT_DIR_RTL) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR;
919 gtk_render_insertion_cursor (context, cr,
920 line_display->x_offset, line_display->top_margin,
921 line_display->layout, index, dir);
924 } /* line_display->height > 0 */
926 cairo_translate (cr, 0, line_display->height);
927 gtk_text_layout_free_line_display (layout, line_display);
929 tmp_list = g_slist_next (tmp_list);
932 gtk_text_layout_wrap_loop_end (layout);
934 tmp_widgets = text_renderer_end (text_renderer);
936 *widgets = tmp_widgets;
938 g_list_free_full (tmp_widgets, g_object_unref);
940 g_slist_free (line_list);