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_get_error_color (GtkTextRenderer *text_renderer)
124 static const GdkColor red = { 0, 0xffff, 0, 0 };
126 if (!text_renderer->error_color)
127 gtk_widget_style_get (text_renderer->widget,
128 "error-underline-color", &text_renderer->error_color,
131 if (!text_renderer->error_color)
132 text_renderer->error_color = gdk_color_copy (&red);
134 return text_renderer->error_color;
138 text_renderer_set_gdk_color (GtkTextRenderer *text_renderer,
139 PangoRenderPart part,
142 PangoRenderer *renderer = PANGO_RENDERER (text_renderer);
148 color.red = gdk_color->red;
149 color.green = gdk_color->green;
150 color.blue = gdk_color->blue;
152 pango_renderer_set_color (renderer, part, &color);
155 pango_renderer_set_color (renderer, part, NULL);
159 static GtkTextAppearance *
160 get_item_appearance (PangoItem *item)
162 GSList *tmp_list = item->analysis.extra_attrs;
166 PangoAttribute *attr = tmp_list->data;
168 if (attr->klass->type == gtk_text_attr_appearance_type)
169 return &((GtkTextAttrAppearance *)attr)->appearance;
171 tmp_list = tmp_list->next;
178 gtk_text_renderer_prepare_run (PangoRenderer *renderer,
181 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
182 GdkColor *bg_color, *fg_color, *underline_color;
183 GtkTextAppearance *appearance;
185 PANGO_RENDERER_CLASS (_gtk_text_renderer_parent_class)->prepare_run (renderer, run);
187 appearance = get_item_appearance (run->item);
188 g_assert (appearance != NULL);
190 if (appearance->draw_bg && text_renderer->state == NORMAL)
191 bg_color = &appearance->bg_color;
195 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_BACKGROUND, bg_color);
197 if (text_renderer->state == SELECTED)
199 if (gtk_widget_has_focus (text_renderer->widget))
200 fg_color = &text_renderer->widget->style->text[GTK_STATE_SELECTED];
202 fg_color = &text_renderer->widget->style->text[GTK_STATE_ACTIVE];
204 else if (text_renderer->state == CURSOR && gtk_widget_has_focus (text_renderer->widget))
205 fg_color = &text_renderer->widget->style->base[GTK_STATE_NORMAL];
207 fg_color = &appearance->fg_color;
209 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_FOREGROUND, fg_color);
210 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_STRIKETHROUGH, fg_color);
212 if (appearance->underline == PANGO_UNDERLINE_ERROR)
213 underline_color = text_renderer_get_error_color (text_renderer);
215 underline_color = fg_color;
217 text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_UNDERLINE, underline_color);
221 set_color (GtkTextRenderer *text_renderer,
222 PangoRenderPart part)
226 cairo_save (text_renderer->cr);
228 color = pango_renderer_get_color (PANGO_RENDERER (text_renderer), part);
230 cairo_set_source_rgb (text_renderer->cr,
232 color->green / 65535.,
233 color->blue / 65535.);
237 unset_color (GtkTextRenderer *text_renderer)
239 cairo_restore (text_renderer->cr);
243 gtk_text_renderer_draw_glyphs (PangoRenderer *renderer,
245 PangoGlyphString *glyphs,
249 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
251 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
253 cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
254 pango_cairo_show_glyph_string (text_renderer->cr, font, glyphs);
256 unset_color (text_renderer);
260 gtk_text_renderer_draw_glyph_item (PangoRenderer *renderer,
262 PangoGlyphItem *glyph_item,
266 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
268 set_color (text_renderer, PANGO_RENDER_PART_FOREGROUND);
270 cairo_move_to (text_renderer->cr, (double)x / PANGO_SCALE, (double)y / PANGO_SCALE);
271 pango_cairo_show_glyph_item (text_renderer->cr, text, glyph_item);
273 unset_color (text_renderer);
277 gtk_text_renderer_draw_rectangle (PangoRenderer *renderer,
278 PangoRenderPart part,
284 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
286 set_color (text_renderer, part);
288 cairo_rectangle (text_renderer->cr,
289 (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
290 (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
291 cairo_fill (text_renderer->cr);
293 unset_color (text_renderer);
297 gtk_text_renderer_draw_trapezoid (PangoRenderer *renderer,
298 PangoRenderPart part,
306 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
308 cairo_matrix_t matrix;
310 set_color (text_renderer, part);
312 cr = text_renderer->cr;
314 cairo_get_matrix (cr, &matrix);
315 matrix.xx = matrix.yy = 1.0;
316 matrix.xy = matrix.yx = 0.0;
317 cairo_set_matrix (cr, &matrix);
319 cairo_move_to (cr, x11, y1_);
320 cairo_line_to (cr, x21, y1_);
321 cairo_line_to (cr, x22, y2);
322 cairo_line_to (cr, x12, y2);
323 cairo_close_path (cr);
327 unset_color (text_renderer);
331 gtk_text_renderer_draw_error_underline (PangoRenderer *renderer,
337 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
339 set_color (text_renderer, PANGO_RENDER_PART_UNDERLINE);
341 pango_cairo_show_error_underline (text_renderer->cr,
342 (double)x / PANGO_SCALE, (double)y / PANGO_SCALE,
343 (double)width / PANGO_SCALE, (double)height / PANGO_SCALE);
345 unset_color (text_renderer);
349 gtk_text_renderer_draw_shape (PangoRenderer *renderer,
350 PangoAttrShape *attr,
354 GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
357 if (text_renderer->state == SELECTED)
359 if (gtk_widget_has_focus (text_renderer->widget))
360 fg = &text_renderer->widget->style->text[GTK_STATE_SELECTED];
362 fg = &text_renderer->widget->style->text[GTK_STATE_SELECTED];
364 else if (text_renderer->state == CURSOR && gtk_widget_has_focus (text_renderer->widget))
365 fg = &text_renderer->widget->style->base[GTK_STATE_NORMAL];
367 fg = &text_renderer->widget->style->text[GTK_STATE_NORMAL];
369 if (attr->data == NULL)
371 /* This happens if we have an empty widget anchor. Draw
372 * something empty-looking.
374 GdkRectangle shape_rect;
377 shape_rect.x = PANGO_PIXELS (x);
378 shape_rect.y = PANGO_PIXELS (y + attr->logical_rect.y);
379 shape_rect.width = PANGO_PIXELS (x + attr->logical_rect.width) - shape_rect.x;
380 shape_rect.height = PANGO_PIXELS (y + attr->logical_rect.y + attr->logical_rect.height) - shape_rect.y;
382 cr = text_renderer->cr;
386 cairo_set_line_width (cr, 1.0);
387 gdk_cairo_set_source_color (cr, fg);
390 shape_rect.x + 0.5, shape_rect.y + 0.5,
391 shape_rect.width - 1, shape_rect.height - 1);
392 cairo_move_to (cr, shape_rect.x + 0.5, shape_rect.y + 0.5);
394 shape_rect.x + shape_rect.width - 0.5,
395 shape_rect.y + shape_rect.height - 0.5);
396 cairo_move_to (cr, shape_rect.x + 0.5,
397 shape_rect.y + shape_rect.height - 0.5);
398 cairo_line_to (cr, shape_rect.x + shape_rect.width - 0.5,
405 else if (GDK_IS_PIXBUF (attr->data))
407 cairo_t *cr = text_renderer->cr;
408 GdkPixbuf *pixbuf = GDK_PIXBUF (attr->data);
412 gdk_cairo_set_source_pixbuf (cr, pixbuf,
414 PANGO_PIXELS (y) - gdk_pixbuf_get_height (pixbuf));
419 else if (GTK_IS_WIDGET (attr->data))
423 widget = GTK_WIDGET (attr->data);
425 text_renderer->widgets = g_list_prepend (text_renderer->widgets,
426 g_object_ref (widget));
429 g_assert_not_reached (); /* not a pixbuf or widget */
433 gtk_text_renderer_finalize (GObject *object)
435 G_OBJECT_CLASS (_gtk_text_renderer_parent_class)->finalize (object);
439 _gtk_text_renderer_init (GtkTextRenderer *renderer)
444 _gtk_text_renderer_class_init (GtkTextRendererClass *klass)
446 GObjectClass *object_class = G_OBJECT_CLASS (klass);
448 PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass);
450 renderer_class->prepare_run = gtk_text_renderer_prepare_run;
451 renderer_class->draw_glyphs = gtk_text_renderer_draw_glyphs;
452 renderer_class->draw_glyph_item = gtk_text_renderer_draw_glyph_item;
453 renderer_class->draw_rectangle = gtk_text_renderer_draw_rectangle;
454 renderer_class->draw_trapezoid = gtk_text_renderer_draw_trapezoid;
455 renderer_class->draw_error_underline = gtk_text_renderer_draw_error_underline;
456 renderer_class->draw_shape = gtk_text_renderer_draw_shape;
458 object_class->finalize = gtk_text_renderer_finalize;
462 text_renderer_set_state (GtkTextRenderer *text_renderer,
465 text_renderer->state = state;
469 text_renderer_begin (GtkTextRenderer *text_renderer,
473 text_renderer->widget = widget;
474 text_renderer->cr = cr;
477 /* Returns a GSList of (referenced) widgets encountered while drawing.
480 text_renderer_end (GtkTextRenderer *text_renderer)
482 GList *widgets = text_renderer->widgets;
484 text_renderer->widget = NULL;
485 text_renderer->cr = NULL;
487 text_renderer->widgets = NULL;
489 if (text_renderer->error_color)
491 gdk_color_free (text_renderer->error_color);
492 text_renderer->error_color = NULL;
499 static cairo_region_t *
500 get_selected_clip (GtkTextRenderer *text_renderer,
502 PangoLayoutLine *line,
511 cairo_region_t *clip_region = cairo_region_create ();
513 pango_layout_line_get_x_ranges (line, start_index, end_index, &ranges, &n_ranges);
515 for (i=0; i < n_ranges; i++)
519 rect.x = x + PANGO_PIXELS (ranges[2*i]);
521 rect.width = PANGO_PIXELS (ranges[2*i + 1]) - PANGO_PIXELS (ranges[2*i]);
522 rect.height = height;
524 cairo_region_union_rectangle (clip_region, &rect);
532 render_para (GtkTextRenderer *text_renderer,
533 GtkTextLineDisplay *line_display,
534 /* Top-left corner of paragraph including all margins */
537 int selection_start_index,
538 int selection_end_index)
540 PangoLayout *layout = line_display->layout;
542 PangoLayoutIter *iter;
543 PangoRectangle layout_logical;
548 gboolean first = TRUE;
550 iter = pango_layout_get_iter (layout);
552 pango_layout_iter_get_layout_extents (iter, NULL, &layout_logical);
554 /* Adjust for margins */
556 layout_logical.x += line_display->x_offset * PANGO_SCALE;
557 layout_logical.y += line_display->top_margin * PANGO_SCALE;
559 screen_width = line_display->total_width;
561 if (gtk_widget_has_focus (text_renderer->widget))
562 state = GTK_STATE_SELECTED;
564 state = GTK_STATE_ACTIVE;
566 selection = &text_renderer->widget->style->base [state];
570 PangoLayoutLine *line = pango_layout_iter_get_line_readonly (iter);
571 int selection_y, selection_height;
573 PangoRectangle line_rect;
575 gboolean at_last_line;
577 pango_layout_iter_get_line_extents (iter, NULL, &line_rect);
578 baseline = pango_layout_iter_get_baseline (iter);
579 pango_layout_iter_get_line_yrange (iter, &first_y, &last_y);
581 /* Adjust for margins */
583 line_rect.x += line_display->x_offset * PANGO_SCALE;
584 line_rect.y += line_display->top_margin * PANGO_SCALE;
585 baseline += line_display->top_margin * PANGO_SCALE;
587 /* Selection is the height of the line, plus top/bottom
588 * margin if we're the first/last line
590 selection_y = y + PANGO_PIXELS (first_y) + line_display->top_margin;
591 selection_height = PANGO_PIXELS (last_y) - PANGO_PIXELS (first_y);
595 selection_y -= line_display->top_margin;
596 selection_height += line_display->top_margin;
599 at_last_line = pango_layout_iter_at_last_line (iter);
601 selection_height += line_display->bottom_margin;
605 if (selection_start_index < byte_offset &&
606 selection_end_index > line->length + byte_offset) /* All selected */
608 cairo_t *cr = text_renderer->cr;
611 gdk_cairo_set_source_color (cr, selection);
613 x + line_display->left_margin, selection_y,
614 screen_width, selection_height);
618 text_renderer_set_state (text_renderer, SELECTED);
619 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
621 PANGO_SCALE * x + line_rect.x,
622 PANGO_SCALE * y + baseline);
626 if (line_display->pg_bg_color)
628 cairo_t *cr = text_renderer->cr;
632 gdk_cairo_set_source_color (cr, line_display->pg_bg_color);
634 x + line_display->left_margin, selection_y,
635 screen_width, selection_height);
641 text_renderer_set_state (text_renderer, NORMAL);
642 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
644 PANGO_SCALE * x + line_rect.x,
645 PANGO_SCALE * y + baseline);
647 /* Check if some part of the line is selected; the newline
648 * that is after line->length for the last line of the
649 * paragraph counts as part of the line for this
651 if ((selection_start_index < byte_offset + line->length ||
652 (selection_start_index == byte_offset + line->length && pango_layout_iter_at_last_line (iter))) &&
653 selection_end_index > byte_offset)
655 cairo_t *cr = text_renderer->cr;
656 cairo_region_t *clip_region = get_selected_clip (text_renderer, layout, line,
657 x + line_display->x_offset,
660 selection_start_index, selection_end_index);
663 gdk_cairo_region (cr, clip_region);
665 cairo_region_destroy (clip_region);
667 gdk_cairo_set_source_color (cr, selection);
669 x + PANGO_PIXELS (line_rect.x),
671 PANGO_PIXELS (line_rect.width),
675 text_renderer_set_state (text_renderer, SELECTED);
676 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
678 PANGO_SCALE * x + line_rect.x,
679 PANGO_SCALE * y + baseline);
683 /* Paint in the ends of the line */
684 if (line_rect.x > line_display->left_margin * PANGO_SCALE &&
685 ((line_display->direction == GTK_TEXT_DIR_LTR && selection_start_index < byte_offset) ||
686 (line_display->direction == GTK_TEXT_DIR_RTL && selection_end_index > byte_offset + line->length)))
690 gdk_cairo_set_source_color (cr, selection);
692 x + line_display->left_margin,
694 PANGO_PIXELS (line_rect.x) - line_display->left_margin,
701 if (line_rect.x + line_rect.width <
702 (screen_width + line_display->left_margin) * PANGO_SCALE &&
703 ((line_display->direction == GTK_TEXT_DIR_LTR && selection_end_index > byte_offset + line->length) ||
704 (line_display->direction == GTK_TEXT_DIR_RTL && selection_start_index < byte_offset)))
709 line_display->left_margin + screen_width -
710 PANGO_PIXELS (line_rect.x) - PANGO_PIXELS (line_rect.width);
714 gdk_cairo_set_source_color (cr, selection);
716 x + PANGO_PIXELS (line_rect.x) + PANGO_PIXELS (line_rect.width),
725 else if (line_display->has_block_cursor &&
726 gtk_widget_has_focus (text_renderer->widget) &&
727 byte_offset <= line_display->insert_index &&
728 (line_display->insert_index < byte_offset + line->length ||
729 (at_last_line && line_display->insert_index == byte_offset + line->length)))
731 GdkRectangle cursor_rect;
732 GdkColor cursor_color;
733 cairo_t *cr = text_renderer->cr;
735 /* we draw text using base color on filled cursor rectangle of cursor color
736 * (normally white on black) */
737 _gtk_widget_get_cursor_color (text_renderer->widget, &cursor_color);
739 cursor_rect.x = x + line_display->x_offset + line_display->block_cursor.x;
740 cursor_rect.y = y + line_display->block_cursor.y + line_display->top_margin;
741 cursor_rect.width = line_display->block_cursor.width;
742 cursor_rect.height = line_display->block_cursor.height;
746 gdk_cairo_rectangle (cr, &cursor_rect);
749 gdk_cairo_set_source_color (cr, &cursor_color);
752 /* draw text under the cursor if any */
753 if (!line_display->cursor_at_line_end)
755 gdk_cairo_set_source_color (cr,
756 &text_renderer->widget->style->base[text_renderer->widget->state]);
758 text_renderer_set_state (text_renderer, CURSOR);
760 pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
762 PANGO_SCALE * x + line_rect.x,
763 PANGO_SCALE * y + baseline);
771 byte_offset += line->length;
773 while (pango_layout_iter_next_line (iter));
775 pango_layout_iter_free (iter);
778 static GtkTextRenderer *
779 get_text_renderer (void)
781 static GtkTextRenderer *text_renderer = NULL;
784 text_renderer = g_object_new (GTK_TYPE_TEXT_RENDERER, NULL);
786 return text_renderer;
790 gtk_text_layout_draw (GtkTextLayout *layout,
792 GdkDrawable *drawable,
794 /* Location of the drawable
795 in layout coordinates */
798 /* Region of the layout to
804 /* widgets to expose */
810 GtkTextRenderer *text_renderer;
811 GtkTextIter selection_start, selection_end;
812 gboolean have_selection = FALSE;
818 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
819 g_return_if_fail (layout->default_style != NULL);
820 g_return_if_fail (layout->buffer != NULL);
821 g_return_if_fail (drawable != NULL);
822 g_return_if_fail (width >= 0);
823 g_return_if_fail (height >= 0);
825 if (width == 0 || height == 0)
828 line_list = gtk_text_layout_get_lines (layout, y + y_offset, y + y_offset + height, ¤t_y);
829 current_y -= y_offset;
831 if (line_list == NULL)
832 return; /* nothing on the screen */
834 cr = gdk_cairo_create (drawable);
835 cairo_rectangle (cr, x, y, width, height);
838 /* cursor code needs this */
842 clip.height = height;
844 gdk_cairo_set_source_color (cr, &widget->style->text[widget->state]);
846 text_renderer = get_text_renderer ();
847 text_renderer_begin (text_renderer, widget, cr);
849 gtk_text_layout_wrap_loop_start (layout);
851 if (gtk_text_buffer_get_selection_bounds (layout->buffer,
854 have_selection = TRUE;
856 tmp_list = line_list;
857 while (tmp_list != NULL)
859 GtkTextLineDisplay *line_display;
860 gint selection_start_index = -1;
861 gint selection_end_index = -1;
862 gboolean have_strong;
865 GtkTextLine *line = tmp_list->data;
867 line_display = gtk_text_layout_get_line_display (layout, line, FALSE);
869 if (line_display->height > 0)
871 g_assert (line_display->layout != NULL);
875 GtkTextIter line_start, line_end;
878 gtk_text_layout_get_iter_at_line (layout,
881 line_end = line_start;
882 if (!gtk_text_iter_ends_line (&line_end))
883 gtk_text_iter_forward_to_line_end (&line_end);
884 byte_count = gtk_text_iter_get_visible_line_index (&line_end);
886 if (gtk_text_iter_compare (&selection_start, &line_end) <= 0 &&
887 gtk_text_iter_compare (&selection_end, &line_start) >= 0)
889 if (gtk_text_iter_compare (&selection_start, &line_start) >= 0)
890 selection_start_index = gtk_text_iter_get_visible_line_index (&selection_start);
892 selection_start_index = -1;
894 if (gtk_text_iter_compare (&selection_end, &line_end) <= 0)
895 selection_end_index = gtk_text_iter_get_visible_line_index (&selection_end);
897 selection_end_index = byte_count + 1; /* + 1 to flag past-the-end */
901 render_para (text_renderer, line_display,
904 selection_start_index, selection_end_index);
906 /* We paint the cursors last, because they overlap another chunk
907 and need to appear on top. */
912 cursor_list = line_display->cursors;
915 GtkTextCursorDisplay *cursor = cursor_list->data;
916 if (cursor->is_strong)
921 cursor_list = cursor_list->next;
924 cursor_list = line_display->cursors;
927 GtkTextCursorDisplay *cursor = cursor_list->data;
928 GtkTextDirection dir;
929 GdkRectangle cursor_location;
931 dir = line_display->direction;
932 if (have_strong && have_weak)
934 if (!cursor->is_strong)
935 dir = (dir == GTK_TEXT_DIR_RTL) ? GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
938 cursor_location.x = line_display->x_offset + cursor->x - x_offset;
939 cursor_location.y = current_y + line_display->top_margin + cursor->y;
940 cursor_location.width = 0;
941 cursor_location.height = cursor->height;
943 gtk_draw_insertion_cursor (widget, drawable, &clip, &cursor_location,
945 dir, have_strong && have_weak);
947 cursor_list = cursor_list->next;
949 } /* line_display->height > 0 */
951 current_y += line_display->height;
952 gtk_text_layout_free_line_display (layout, line_display);
954 tmp_list = g_slist_next (tmp_list);
957 gtk_text_layout_wrap_loop_end (layout);
959 tmp_widgets = text_renderer_end (text_renderer);
961 *widgets = tmp_widgets;
964 g_list_foreach (tmp_widgets, (GFunc)g_object_unref, NULL);
965 g_list_free (tmp_widgets);
970 g_slist_free (line_list);