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 GType _gtk_text_renderer_get_type (void);
126 G_DEFINE_TYPE (GtkTextRenderer, _gtk_text_renderer, PANGO_TYPE_RENDERER)
129 text_renderer_set_rgba (GtkTextRenderer *text_renderer,
130 PangoRenderPart part,
133 PangoRenderer *renderer = PANGO_RENDERER (text_renderer);
134 PangoColor dummy = { 0, };
138 text_renderer->rgba[part] = *rgba;
139 pango_renderer_set_color (renderer, part, &dummy);
142 pango_renderer_set_color (renderer, part, NULL);
144 text_renderer->rgba_set[part] = (rgba != NULL);
147 static GtkTextAppearance *
148 get_item_appearance (PangoItem *item)
150 GSList *tmp_list = item->analysis.extra_attrs;
154 PangoAttribute *attr = tmp_list->data;
156 if (attr->klass->type == gtk_text_attr_appearance_type)
157 return &((GtkTextAttrAppearance *)attr)->appearance;
159 tmp_list = tmp_list->next;
166 gtk_text_renderer_prepare_run (PangoRenderer *renderer,
169 GtkStyleContext *context;
171 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
172 GdkRGBA *bg_rgba = NULL;
173 GdkRGBA *fg_rgba = NULL;
174 GtkTextAppearance *appearance;
176 PANGO_RENDERER_CLASS (_gtk_text_renderer_parent_class)->prepare_run (renderer, run);
178 appearance = get_item_appearance (run->item);
179 g_assert (appearance != NULL);
181 context = gtk_widget_get_style_context (text_renderer->widget);
182 state = gtk_widget_get_state_flags (text_renderer->widget);
184 if (appearance->draw_bg && text_renderer->state == NORMAL)
185 bg_rgba = appearance->rgba[0];
189 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_BACKGROUND, bg_rgba);
191 if (text_renderer->state == SELECTED)
193 state |= GTK_STATE_FLAG_SELECTED;
195 gtk_style_context_get (context, state, "color", &fg_rgba, NULL);
197 else if (text_renderer->state == CURSOR && gtk_widget_has_focus (text_renderer->widget))
199 gtk_style_context_get (context, state,
200 "background-color", &fg_rgba,
204 fg_rgba = appearance->rgba[1];
206 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_FOREGROUND, fg_rgba);
207 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_STRIKETHROUGH, fg_rgba);
209 if (appearance->underline == PANGO_UNDERLINE_ERROR)
211 if (!text_renderer->error_color)
213 GdkColor *color = NULL;
215 gtk_style_context_get_style (context,
216 "error-underline-color", &color,
223 rgba.red = color->red / 65535.;
224 rgba.green = color->green / 65535.;
225 rgba.blue = color->blue / 65535.;
227 gdk_color_free (color);
229 text_renderer->error_color = gdk_rgba_copy (&rgba);
233 static const GdkRGBA red = { 1, 0, 0, 1 };
234 text_renderer->error_color = gdk_rgba_copy (&red);
238 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_UNDERLINE, text_renderer->error_color);
241 text_renderer_set_rgba (text_renderer, PANGO_RENDER_PART_UNDERLINE, fg_rgba);
243 if (fg_rgba != appearance->rgba[1])
244 gdk_rgba_free (fg_rgba);
248 set_color (GtkTextRenderer *text_renderer,
249 PangoRenderPart part)
251 cairo_save (text_renderer->cr);
253 if (text_renderer->rgba_set[part])
254 gdk_cairo_set_source_rgba (text_renderer->cr, &text_renderer->rgba[part]);
258 unset_color (GtkTextRenderer *text_renderer)
260 cairo_restore (text_renderer->cr);
264 gtk_text_renderer_draw_glyphs (PangoRenderer *renderer,
266 PangoGlyphString *glyphs,
270 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
272 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
274 cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
275 pango_cairo_show_glyph_string (text_renderer->cr, font, glyphs);
277 unset_color (text_renderer);
281 gtk_text_renderer_draw_glyph_item (PangoRenderer *renderer,
283 PangoGlyphItem *glyph_item,
287 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
289 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
291 cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
292 pango_cairo_show_glyph_item (text_renderer->cr, text, glyph_item);
294 unset_color (text_renderer);
298 gtk_text_renderer_draw_rectangle (PangoRenderer *renderer,
299 PangoRenderPart part,
305 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
307 set_color (text_renderer, part);
309 cairo_rectangle (text_renderer->cr,
310 (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
311 (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
312 cairo_fill (text_renderer->cr);
314 unset_color (text_renderer);
318 gtk_text_renderer_draw_trapezoid (PangoRenderer *renderer,
319 PangoRenderPart part,
327 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
329 cairo_matrix_t matrix;
331 set_color (text_renderer, part);
333 cr = text_renderer->cr;
335 cairo_get_matrix (cr, &matrix);
336 matrix.xx = matrix.yy = 1.0;
337 matrix.xy = matrix.yx = 0.0;
338 cairo_set_matrix (cr, &matrix);
340 cairo_move_to (cr, x11, y1_);
341 cairo_line_to (cr, x21, y1_);
342 cairo_line_to (cr, x22, y2);
343 cairo_line_to (cr, x12, y2);
344 cairo_close_path (cr);
348 unset_color (text_renderer);
352 gtk_text_renderer_draw_error_underline (PangoRenderer *renderer,
358 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
360 set_color (text_renderer, PANGO_RENDER_PART_UNDERLINE);
362 pango_cairo_show_error_underline (text_renderer->cr,
363 (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
364 (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
366 unset_color (text_renderer);
370 gtk_text_renderer_draw_shape (PangoRenderer *renderer,
371 PangoAttrShape *attr,
375 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
377 if (attr->data == NULL)
379 /* This happens if we have an empty widget anchor. Draw
380 * something empty-looking.
382 GdkRectangle shape_rect;
385 shape_rect.x = PANGO_PIXELS (x);
386 shape_rect.y = PANGO_PIXELS (y + attr->logical_rect.y);
387 shape_rect.width = PANGO_PIXELS (x + attr->logical_rect.width) - shape_rect.x;
388 shape_rect.height = PANGO_PIXELS (y + attr->logical_rect.y + attr->logical_rect.height) - shape_rect.y;
390 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
392 cr = text_renderer->cr;
394 cairo_set_line_width (cr, 1.0);
397 shape_rect.x + 0.5, shape_rect.y + 0.5,
398 shape_rect.width - 1, shape_rect.height - 1);
399 cairo_move_to (cr, shape_rect.x + 0.5, shape_rect.y + 0.5);
401 shape_rect.x + shape_rect.width - 0.5,
402 shape_rect.y + shape_rect.height - 0.5);
403 cairo_move_to (cr, shape_rect.x + 0.5,
404 shape_rect.y + shape_rect.height - 0.5);
405 cairo_line_to (cr, shape_rect.x + shape_rect.width - 0.5,
410 unset_color (text_renderer);
412 else if (GDK_IS_PIXBUF (attr->data))
414 cairo_t *cr = text_renderer->cr;
415 GdkPixbuf *pixbuf = GDK_PIXBUF (attr->data);
419 gdk_cairo_set_source_pixbuf (cr, pixbuf,
421 PANGO_PIXELS (y) - gdk_pixbuf_get_height (pixbuf));
426 else if (GTK_IS_WIDGET (attr->data))
430 widget = GTK_WIDGET (attr->data);
432 text_renderer->widgets = g_list_prepend (text_renderer->widgets,
433 g_object_ref (widget));
436 g_assert_not_reached (); /* not a pixbuf or widget */
440 gtk_text_renderer_finalize (GObject *object)
442 G_OBJECT_CLASS (_gtk_text_renderer_parent_class)->finalize (object);
446 _gtk_text_renderer_init (GtkTextRenderer *renderer)
451 _gtk_text_renderer_class_init (GtkTextRendererClass *klass)
453 GObjectClass *object_class = G_OBJECT_CLASS (klass);
455 PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass);
457 renderer_class->prepare_run = gtk_text_renderer_prepare_run;
458 renderer_class->draw_glyphs = gtk_text_renderer_draw_glyphs;
459 renderer_class->draw_glyph_item = gtk_text_renderer_draw_glyph_item;
460 renderer_class->draw_rectangle = gtk_text_renderer_draw_rectangle;
461 renderer_class->draw_trapezoid = gtk_text_renderer_draw_trapezoid;
462 renderer_class->draw_error_underline = gtk_text_renderer_draw_error_underline;
463 renderer_class->draw_shape = gtk_text_renderer_draw_shape;
465 object_class->finalize = gtk_text_renderer_finalize;
469 text_renderer_set_state (GtkTextRenderer *text_renderer,
472 text_renderer->state = state;
476 text_renderer_begin (GtkTextRenderer *text_renderer,
480 GtkStyleContext *context;
484 text_renderer->widget = widget;
485 text_renderer->cr = cr;
487 context = gtk_widget_get_style_context (widget);
489 gtk_style_context_save (context);
490 gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW);
492 state = gtk_widget_get_state_flags (widget);
493 gtk_style_context_get_color (context, state, &color);
497 gdk_cairo_set_source_rgba (cr, &color);
500 /* Returns a GSList of (referenced) widgets encountered while drawing.
503 text_renderer_end (GtkTextRenderer *text_renderer)
505 GtkStyleContext *context;
506 GList *widgets = text_renderer->widgets;
508 cairo_restore (text_renderer->cr);
510 context = gtk_widget_get_style_context (text_renderer->widget);
512 gtk_style_context_restore (context);
514 text_renderer->widget = NULL;
515 text_renderer->cr = NULL;
517 text_renderer->widgets = NULL;
519 if (text_renderer->error_color)
521 gdk_rgba_free (text_renderer->error_color);
522 text_renderer->error_color = NULL;
528 static cairo_region_t *
529 get_selected_clip (GtkTextRenderer *text_renderer,
531 PangoLayoutLine *line,
540 cairo_region_t *clip_region = cairo_region_create ();
542 pango_layout_line_get_x_ranges (line, start_index, end_index, &ranges, &n_ranges);
544 for (i=0; i < n_ranges; i++)
548 rect.x = x + PANGO_PIXELS (ranges[2*i]);
550 rect.width = PANGO_PIXELS (ranges[2*i + 1]) - PANGO_PIXELS (ranges[2*i]);
551 rect.height = height;
553 cairo_region_union_rectangle (clip_region, &rect);
561 render_para (GtkTextRenderer *text_renderer,
562 GtkTextLineDisplay *line_display,
563 int selection_start_index,
564 int selection_end_index)
566 GtkStyleContext *context;
568 PangoLayout *layout = line_display->layout;
570 PangoLayoutIter *iter;
571 PangoRectangle layout_logical;
574 gboolean first = TRUE;
576 iter = pango_layout_get_iter (layout);
578 pango_layout_iter_get_layout_extents (iter, NULL, &layout_logical);
580 /* Adjust for margins */
582 layout_logical.x += line_display->x_offset * PANGO_SCALE;
583 layout_logical.y += line_display->top_margin * PANGO_SCALE;
585 screen_width = line_display->total_width;
587 context = gtk_widget_get_style_context (text_renderer->widget);
588 state = gtk_widget_get_state_flags (text_renderer->widget);
590 state |= GTK_STATE_FLAG_SELECTED;
592 gtk_style_context_get_background_color (context, state, &selection);
596 PangoLayoutLine *line = pango_layout_iter_get_line_readonly (iter);
597 int selection_y, selection_height;
599 PangoRectangle line_rect;
601 gboolean at_last_line;
603 pango_layout_iter_get_line_extents (iter, NULL, &line_rect);
604 baseline = pango_layout_iter_get_baseline (iter);
605 pango_layout_iter_get_line_yrange (iter, &first_y, &last_y);
607 /* Adjust for margins */
609 line_rect.x += line_display->x_offset * PANGO_SCALE;
610 line_rect.y += line_display->top_margin * PANGO_SCALE;
611 baseline += line_display->top_margin * PANGO_SCALE;
613 /* Selection is the height of the line, plus top/bottom
614 * margin if we're the first/last line
616 selection_y = PANGO_PIXELS (first_y) + line_display->top_margin;
617 selection_height = PANGO_PIXELS (last_y) - PANGO_PIXELS (first_y);
621 selection_y -= line_display->top_margin;
622 selection_height += line_display->top_margin;
625 at_last_line = pango_layout_iter_at_last_line (iter);
627 selection_height += line_display->bottom_margin;
631 if (selection_start_index < byte_offset &&
632 selection_end_index > line->length + byte_offset) /* All selected */
634 cairo_t *cr = text_renderer->cr;
637 gdk_cairo_set_source_rgba (cr, &selection);
639 line_display->left_margin, selection_y,
640 screen_width, selection_height);
644 text_renderer_set_state (text_renderer, SELECTED);
645 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
652 if (line_display->pg_bg_rgba)
654 cairo_t *cr = text_renderer->cr;
658 gdk_cairo_set_source_rgba (text_renderer->cr, line_display->pg_bg_rgba);
660 line_display->left_margin, selection_y,
661 screen_width, selection_height);
667 text_renderer_set_state (text_renderer, NORMAL);
668 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
673 /* Check if some part of the line is selected; the newline
674 * that is after line->length for the last line of the
675 * paragraph counts as part of the line for this
677 if ((selection_start_index < byte_offset + line->length ||
678 (selection_start_index == byte_offset + line->length && pango_layout_iter_at_last_line (iter))) &&
679 selection_end_index > byte_offset)
681 cairo_t *cr = text_renderer->cr;
682 cairo_region_t *clip_region = get_selected_clip (text_renderer, layout, line,
683 line_display->x_offset,
686 selection_start_index, selection_end_index);
689 gdk_cairo_region (cr, clip_region);
691 cairo_region_destroy (clip_region);
693 gdk_cairo_set_source_rgba (cr, &selection);
695 PANGO_PIXELS (line_rect.x),
697 PANGO_PIXELS (line_rect.width),
701 text_renderer_set_state (text_renderer, SELECTED);
702 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
709 /* Paint in the ends of the line */
710 if (line_rect.x > line_display->left_margin * PANGO_SCALE &&
711 ((line_display->direction == GTK_TEXT_DIR_LTR && selection_start_index < byte_offset) ||
712 (line_display->direction == GTK_TEXT_DIR_RTL && selection_end_index > byte_offset + line->length)))
716 gdk_cairo_set_source_rgba (cr, &selection);
718 line_display->left_margin,
720 PANGO_PIXELS (line_rect.x) - line_display->left_margin,
727 if (line_rect.x + line_rect.width <
728 (screen_width + line_display->left_margin) * PANGO_SCALE &&
729 ((line_display->direction == GTK_TEXT_DIR_LTR && selection_end_index > byte_offset + line->length) ||
730 (line_display->direction == GTK_TEXT_DIR_RTL && selection_start_index < byte_offset)))
735 line_display->left_margin + screen_width -
736 PANGO_PIXELS (line_rect.x) - PANGO_PIXELS (line_rect.width);
740 gdk_cairo_set_source_rgba (cr, &selection);
742 PANGO_PIXELS (line_rect.x) + PANGO_PIXELS (line_rect.width),
751 else if (line_display->has_block_cursor &&
752 gtk_widget_has_focus (text_renderer->widget) &&
753 byte_offset <= line_display->insert_index &&
754 (line_display->insert_index < byte_offset + line->length ||
755 (at_last_line && line_display->insert_index == byte_offset + line->length)))
757 GdkRectangle cursor_rect;
758 GdkRGBA cursor_color;
759 cairo_t *cr = text_renderer->cr;
761 /* we draw text using base color on filled cursor rectangle of cursor color
762 * (normally white on black) */
763 _gtk_style_context_get_cursor_color (context, &cursor_color, NULL);
765 cursor_rect.x = line_display->x_offset + line_display->block_cursor.x;
766 cursor_rect.y = line_display->block_cursor.y + line_display->top_margin;
767 cursor_rect.width = line_display->block_cursor.width;
768 cursor_rect.height = line_display->block_cursor.height;
772 gdk_cairo_rectangle (cr, &cursor_rect);
775 gdk_cairo_set_source_rgba (cr, &cursor_color);
778 /* draw text under the cursor if any */
779 if (!line_display->cursor_at_line_end)
783 state = gtk_widget_get_state_flags (text_renderer->widget);
784 gtk_style_context_get_background_color (context, state, &color);
786 gdk_cairo_set_source_rgba (cr, &color);
788 text_renderer_set_state (text_renderer, CURSOR);
790 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
800 byte_offset += line->length;
802 while (pango_layout_iter_next_line (iter));
804 pango_layout_iter_free (iter);
807 static GtkTextRenderer *
808 get_text_renderer (void)
810 static GtkTextRenderer *text_renderer = NULL;
813 text_renderer = g_object_new (GTK_TYPE_TEXT_RENDERER, NULL);
815 return text_renderer;
819 gtk_text_layout_draw (GtkTextLayout *layout,
824 GtkStyleContext *context;
826 GtkTextRenderer *text_renderer;
827 GtkTextIter selection_start, selection_end;
828 gboolean have_selection;
834 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
835 g_return_if_fail (layout->default_style != NULL);
836 g_return_if_fail (layout->buffer != NULL);
837 g_return_if_fail (cr != NULL);
839 if (!gdk_cairo_get_clip_rectangle (cr, &clip))
842 context = gtk_widget_get_style_context (widget);
844 line_list = gtk_text_layout_get_lines (layout, clip.y, clip.y + clip.height, &offset_y);
846 if (line_list == NULL)
847 return; /* nothing on the screen */
849 text_renderer = get_text_renderer ();
850 text_renderer_begin (text_renderer, widget, cr);
852 /* text_renderer_begin/end does cairo_save/restore */
853 cairo_translate (cr, 0, offset_y);
855 gtk_text_layout_wrap_loop_start (layout);
857 have_selection = gtk_text_buffer_get_selection_bounds (layout->buffer,
861 tmp_list = line_list;
862 while (tmp_list != NULL)
864 GtkTextLineDisplay *line_display;
865 gint selection_start_index = -1;
866 gint selection_end_index = -1;
868 GtkTextLine *line = tmp_list->data;
870 line_display = gtk_text_layout_get_line_display (layout, line, FALSE);
872 if (line_display->height > 0)
874 g_assert (line_display->layout != NULL);
878 GtkTextIter line_start, line_end;
881 gtk_text_layout_get_iter_at_line (layout,
884 line_end = line_start;
885 if (!gtk_text_iter_ends_line (&line_end))
886 gtk_text_iter_forward_to_line_end (&line_end);
887 byte_count = gtk_text_iter_get_visible_line_index (&line_end);
889 if (gtk_text_iter_compare (&selection_start, &line_end) <= 0 &&
890 gtk_text_iter_compare (&selection_end, &line_start) >= 0)
892 if (gtk_text_iter_compare (&selection_start, &line_start) >= 0)
893 selection_start_index = gtk_text_iter_get_visible_line_index (&selection_start);
895 selection_start_index = -1;
897 if (gtk_text_iter_compare (&selection_end, &line_end) <= 0)
898 selection_end_index = gtk_text_iter_get_visible_line_index (&selection_end);
900 selection_end_index = byte_count + 1; /* + 1 to flag past-the-end */
904 render_para (text_renderer, line_display,
905 selection_start_index, selection_end_index);
907 /* We paint the cursors last, because they overlap another chunk
908 * and need to appear on top.
910 if (line_display->cursors != NULL)
914 for (i = 0; i < line_display->cursors->len; i++)
919 index = g_array_index(line_display->cursors, int, i);
920 dir = (line_display->direction == GTK_TEXT_DIR_RTL) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR;
921 gtk_render_insertion_cursor (context, cr,
922 line_display->x_offset, line_display->top_margin,
923 line_display->layout, index, dir);
926 } /* line_display->height > 0 */
928 cairo_translate (cr, 0, line_display->height);
929 gtk_text_layout_free_line_display (layout, line_display);
931 tmp_list = g_slist_next (tmp_list);
934 gtk_text_layout_wrap_loop_end (layout);
936 tmp_widgets = text_renderer_end (text_renderer);
938 *widgets = tmp_widgets;
940 g_list_free_full (tmp_widgets, g_object_unref);
942 g_slist_free (line_list);