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gtk2/gtk/gtktextdisplay.c
Federico Mena Quintero 80581c3011 Fixes #136082 and #135265, patch by Morten Welinder. 
2004-03-05  Federico Mena Quintero  <federico@ximian.com>

	Fixes #136082 and #135265, patch by Morten Welinder.

	* configure.in: Use AC_SYS_LARGEFILE.

	* */*.c: #include <config.h>
2004-03-06 03:38:59 +00:00

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/* gtktextdisplay.c - display layed-out text
*
* Copyright (c) 1992-1994 The Regents of the University of California.
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
* Copyright (c) 2000 Red Hat, Inc.
* Tk->Gtk port by Havoc Pennington
*
* This file can be used under your choice of two licenses, the LGPL
* and the original Tk license.
*
* LGPL:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Original Tk license:
*
* This software is copyrighted by the Regents of the University of
* California, Sun Microsystems, Inc., and other parties. The
* following terms apply to all files associated with the software
* unless explicitly disclaimed in individual files.
*
* The authors hereby grant permission to use, copy, modify,
* distribute, and license this software and its documentation for any
* purpose, provided that existing copyright notices are retained in
* all copies and that this notice is included verbatim in any
* distributions. No written agreement, license, or royalty fee is
* required for any of the authorized uses. Modifications to this
* software may be copyrighted by their authors and need not follow
* the licensing terms described here, provided that the new terms are
* clearly indicated on the first page of each file where they apply.
*
* IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
* DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
* OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
* NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
* AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* GOVERNMENT USE: If you are acquiring this software on behalf of the
* U.S. government, the Government shall have only "Restricted Rights"
* in the software and related documentation as defined in the Federal
* Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
* are acquiring the software on behalf of the Department of Defense,
* the software shall be classified as "Commercial Computer Software"
* and the Government shall have only "Restricted Rights" as defined
* in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
* foregoing, the authors grant the U.S. Government and others acting
* in its behalf permission to use and distribute the software in
* accordance with the terms specified in this license.
*
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
#include <config.h>
#include "gtktextdisplay.h"
/* DO NOT go putting private headers in here. This file should only
* use the semi-public headers, as with gtktextview.c.
*/
#include <pango/pango.h>
typedef struct _GtkTextRenderState GtkTextRenderState;
struct _GtkTextRenderState
{
GtkWidget *widget;
GtkTextAppearance *last_appearance;
GtkTextAppearance *last_bg_appearance;
GdkGC *fg_gc;
GdkGC *bg_gc;
GdkGC *error_gc;
GdkRectangle clip_rect;
};
static void get_item_properties (PangoItem *item,
GtkTextAppearance **appearance);
static GdkRegion *get_selected_clip (GtkTextRenderState *render_state,
PangoLayout *layout,
PangoLayoutLine *line,
int x,
int y,
int height,
int start_index,
int end_index);
static GtkTextRenderState *
gtk_text_render_state_new (GtkWidget *widget,
GdkDrawable *drawable,
GdkRectangle *clip_rect)
{
GtkTextRenderState *state = g_new0 (GtkTextRenderState, 1);
state->widget = widget;
state->fg_gc = gdk_gc_new (drawable);
state->bg_gc = gdk_gc_new (drawable);
state->clip_rect = *clip_rect;
return state;
}
static void
gtk_text_render_state_destroy (GtkTextRenderState *state)
{
g_object_unref (state->fg_gc);
g_object_unref (state->bg_gc);
if (state->error_gc)
g_object_unref (state->error_gc);
g_free (state);
}
static void
gtk_text_render_state_set_color (GtkTextRenderState *state,
GdkGC *gc,
GdkColor *color)
{
gdk_colormap_alloc_color (gtk_widget_get_colormap (state->widget), color, FALSE, TRUE);
gdk_gc_set_foreground (gc, color);
}
static void
gtk_text_render_state_update (GtkTextRenderState *state,
GtkTextAppearance *new_appearance)
{
GdkScreen *screen = gtk_widget_get_screen (state->widget);
if (!state->last_appearance ||
!gdk_color_equal (&new_appearance->fg_color, &state->last_appearance->fg_color))
gtk_text_render_state_set_color (state, state->fg_gc, &new_appearance->fg_color);
if (!state->last_appearance ||
new_appearance->fg_stipple != state->last_appearance->fg_stipple)
{
if (new_appearance->fg_stipple)
{
if (screen == gdk_drawable_get_screen (new_appearance->fg_stipple))
{
gdk_gc_set_fill (state->fg_gc, GDK_STIPPLED);
gdk_gc_set_stipple (state->fg_gc, new_appearance->fg_stipple);
}
else
g_warning ("gtk_text_render_state_update:\n"
"The foreground stipple bitmap has been created on the wrong screen.\n"
"Ignoring the stipple bitmap information.");
}
else
{
gdk_gc_set_fill (state->fg_gc, GDK_SOLID);
}
}
if (new_appearance->draw_bg)
{
if (!state->last_bg_appearance ||
!gdk_color_equal (&new_appearance->bg_color, &state->last_bg_appearance->bg_color))
gtk_text_render_state_set_color (state, state->bg_gc, &new_appearance->bg_color);
if (!state->last_bg_appearance ||
new_appearance->bg_stipple != state->last_bg_appearance->bg_stipple)
{
if (new_appearance->bg_stipple)
{
if (screen == gdk_drawable_get_screen (new_appearance->bg_stipple))
{
gdk_gc_set_fill (state->bg_gc, GDK_STIPPLED);
gdk_gc_set_stipple (state->bg_gc, new_appearance->bg_stipple);
}
else
g_warning ("gtk_text_render_state_update:\n"
"The background stipple bitmap has been created on the wrong screen.\n"
"Ignoring the stipple bitmap information.");
}
else
{
gdk_gc_set_fill (state->bg_gc, GDK_SOLID);
}
}
state->last_bg_appearance = new_appearance;
}
state->last_appearance = new_appearance;
}
static GdkGC *
gtk_text_render_state_get_error_gc (GtkTextRenderState *state)
{
if (!state->error_gc)
{
static const GdkColor red = { 0, 0xffff, 0, 0 };
GdkGCValues gc_values;
GdkGCValuesMask gc_values_mask;
GdkColor *underline_color;
GtkWidget *widget = state->widget;
gtk_widget_style_get (widget, "error-underline_color", &underline_color, NULL);
gc_values_mask = GDK_GC_FOREGROUND;
if (underline_color)
{
gc_values.foreground = *underline_color;
gdk_color_free (underline_color);
}
else
gc_values.foreground = red;
gdk_rgb_find_color (widget->style->colormap, &gc_values.foreground);
state->error_gc = gdk_gc_new_with_values (widget->window, &gc_values, gc_values_mask);
}
return state->error_gc;
}
static void
get_shape_extents (PangoLayoutRun *run,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect)
{
GSList *tmp_list = run->item->analysis.extra_attrs;
while (tmp_list)
{
PangoAttribute *attr = tmp_list->data;
if (attr->klass->type == PANGO_ATTR_SHAPE)
{
if (logical_rect)
*logical_rect = ((PangoAttrShape *)attr)->logical_rect;
if (ink_rect)
*ink_rect = ((PangoAttrShape *)attr)->ink_rect;
return;
}
tmp_list = tmp_list->next;
}
g_assert_not_reached ();
}
static void
render_layout_line (GdkDrawable *drawable,
GtkTextRenderState *render_state,
PangoLayoutLine *line,
GSList **shaped_pointer,
int x,
int y,
gboolean selected,
GList **widgets)
{
GSList *tmp_list = line->runs;
PangoRectangle overall_rect;
PangoRectangle logical_rect;
PangoRectangle ink_rect;
gint x_off = 0;
GdkGC *fg_gc;
pango_layout_line_get_extents (line, NULL, &overall_rect);
while (tmp_list)
{
PangoLayoutRun *run = tmp_list->data;
GtkTextAppearance *appearance;
gint risen_y;
gint shaped_width_pixels = 0;
gboolean need_ink = FALSE;
tmp_list = tmp_list->next;
get_item_properties (run->item, &appearance);
g_assert (appearance != NULL);
risen_y = y - PANGO_PIXELS (appearance->rise);
if (selected)
{
if (GTK_WIDGET_HAS_FOCUS (render_state->widget))
fg_gc = render_state->widget->style->text_gc[GTK_STATE_SELECTED];
else
fg_gc = render_state->widget->style->text_gc [GTK_STATE_ACTIVE];
}
else
{
gtk_text_render_state_update (render_state, appearance);
fg_gc = render_state->fg_gc;
}
if (appearance->underline != PANGO_UNDERLINE_NONE ||
appearance->strikethrough)
need_ink = TRUE;
if (appearance->is_text)
{
if (need_ink)
pango_glyph_string_extents (run->glyphs, run->item->analysis.font,
&ink_rect, &logical_rect);
else
pango_glyph_string_extents (run->glyphs, run->item->analysis.font,
NULL, &logical_rect);
}
else
{
if (need_ink)
get_shape_extents (run, &ink_rect, &logical_rect);
else
get_shape_extents (run, NULL, &logical_rect);
}
if (appearance->draw_bg && !selected)
gdk_draw_rectangle (drawable, render_state->bg_gc, TRUE,
x + PANGO_PIXELS (x_off) + PANGO_PIXELS (logical_rect.x),
risen_y + PANGO_PIXELS (logical_rect.y),
PANGO_PIXELS (logical_rect.width),
PANGO_PIXELS (logical_rect.height));
if (appearance->is_text)
gdk_draw_glyphs (drawable, fg_gc,
run->item->analysis.font,
x + PANGO_PIXELS (x_off),
risen_y, run->glyphs);
else
{
GObject *shaped = (*shaped_pointer)->data;
*shaped_pointer = (*shaped_pointer)->next;
if (shaped == NULL)
{
/* This happens if we have an empty widget anchor. Draw
* something empty-looking.
*/
GdkRectangle shape_rect, draw_rect;
shape_rect.x = x + x_off / PANGO_SCALE;
shape_rect.y = risen_y - PANGO_PIXELS (logical_rect.height);
shape_rect.width = PANGO_PIXELS (logical_rect.width);
shape_rect.height = PANGO_PIXELS (logical_rect.height);
if (gdk_rectangle_intersect (&shape_rect, &render_state->clip_rect,
&draw_rect))
{
gdk_draw_rectangle (drawable, render_state->fg_gc,
FALSE, shape_rect.x, shape_rect.y,
shape_rect.width, shape_rect.height);
gdk_draw_line (drawable, render_state->fg_gc,
shape_rect.x, shape_rect.y,
shape_rect.x + shape_rect.width,
shape_rect.y + shape_rect.height);
gdk_draw_line (drawable, render_state->fg_gc,
shape_rect.x + shape_rect.width, shape_rect.y,
shape_rect.x,
shape_rect.y + shape_rect.height);
}
shaped_width_pixels = shape_rect.width;
}
else if (GDK_IS_PIXBUF (shaped))
{
gint width, height;
GdkRectangle pixbuf_rect, draw_rect;
GdkPixbuf *pixbuf;
pixbuf = GDK_PIXBUF (shaped);
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
pixbuf_rect.x = x + x_off / PANGO_SCALE;
pixbuf_rect.y = risen_y - height;
pixbuf_rect.width = width;
pixbuf_rect.height = height;
if (gdk_rectangle_intersect (&pixbuf_rect, &render_state->clip_rect,
&draw_rect))
{
gdk_draw_pixbuf (drawable,
render_state->fg_gc,
pixbuf,
draw_rect.x - pixbuf_rect.x,
draw_rect.y - pixbuf_rect.y,
draw_rect.x, draw_rect.y,
draw_rect.width,
draw_rect.height,
GDK_RGB_DITHER_NORMAL,
0, 0);
}
shaped_width_pixels = width;
}
else if (GTK_IS_WIDGET (shaped))
{
GtkWidget *widget;
widget = GTK_WIDGET (shaped);
shaped_width_pixels = widget->allocation.width;
if (widgets)
{
g_object_ref (widget);
*widgets = g_list_prepend (*widgets, widget);
}
}
else
g_assert_not_reached (); /* not a pixbuf or widget */
}
switch (appearance->underline)
{
case PANGO_UNDERLINE_NONE:
break;
case PANGO_UNDERLINE_DOUBLE:
g_assert (need_ink);
gdk_draw_line (drawable, fg_gc,
x + (x_off + ink_rect.x) / PANGO_SCALE - 1,
risen_y + 3,
x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE,
risen_y + 3);
/* Fall through */
case PANGO_UNDERLINE_SINGLE:
g_assert (need_ink);
gdk_draw_line (drawable, fg_gc,
x + (x_off + ink_rect.x) / PANGO_SCALE - 1,
risen_y + 1,
x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE,
risen_y + 1);
break;
case PANGO_UNDERLINE_ERROR:
g_assert (need_ink);
{
GdkGC *error_gc = gtk_text_render_state_get_error_gc (render_state);
int point_x, point_y;
int counter = 0;
int end_x = x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE;
for (point_x = x + (x_off + ink_rect.x) / PANGO_SCALE - 1;
point_x <= end_x;
point_x += 2)
{
point_y = counter ? risen_y + 1 : risen_y + 2;
gdk_draw_line (drawable, error_gc,
point_x, point_y,
MIN (point_x + 1, end_x), point_y);
counter = (counter + 1) % 2;
}
}
break;
case PANGO_UNDERLINE_LOW:
g_assert (need_ink);
gdk_draw_line (drawable, fg_gc,
x + (x_off + ink_rect.x) / PANGO_SCALE - 1,
risen_y + (ink_rect.y + ink_rect.height) / PANGO_SCALE + 1,
x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE,
risen_y + (ink_rect.y + ink_rect.height) / PANGO_SCALE + 1);
break;
}
if (appearance->strikethrough)
{
gint strikethrough_y = risen_y + (0.3 * logical_rect.y) / PANGO_SCALE;
g_assert (need_ink);
gdk_draw_line (drawable, fg_gc,
x + (x_off + ink_rect.x) / PANGO_SCALE - 1, strikethrough_y,
x + (x_off + ink_rect.x + ink_rect.width) / PANGO_SCALE, strikethrough_y);
}
if (appearance->is_text)
x_off += logical_rect.width;
else
x_off += shaped_width_pixels * PANGO_SCALE;
}
}
static void
render_para (GdkDrawable *drawable,
GtkTextRenderState *render_state,
GtkTextLineDisplay *line_display,
/* Top-left corner of paragraph including all margins */
int x,
int y,
int selection_start_index,
int selection_end_index,
GList **widgets)
{
GSList *shaped_pointer = line_display->shaped_objects;
PangoLayout *layout = line_display->layout;
int byte_offset = 0;
PangoLayoutIter *iter;
PangoRectangle layout_logical;
int screen_width;
GdkGC *fg_gc, *bg_gc;
gint state;
gboolean first = TRUE;
iter = pango_layout_get_iter (layout);
pango_layout_iter_get_layout_extents (iter, NULL, &layout_logical);
/* Adjust for margins */
layout_logical.x += line_display->x_offset * PANGO_SCALE;
layout_logical.y += line_display->top_margin * PANGO_SCALE;
screen_width = line_display->total_width;
if (GTK_WIDGET_HAS_FOCUS (render_state->widget))
state = GTK_STATE_SELECTED;
else
state = GTK_STATE_ACTIVE;
fg_gc = render_state->widget->style->text_gc [state];
bg_gc = render_state->widget->style->base_gc [state];
do
{
PangoLayoutLine *line = pango_layout_iter_get_line (iter);
int selection_y, selection_height;
int first_y, last_y;
PangoRectangle line_rect;
int baseline;
pango_layout_iter_get_line_extents (iter, NULL, &line_rect);
baseline = pango_layout_iter_get_baseline (iter);
pango_layout_iter_get_line_yrange (iter, &first_y, &last_y);
/* Adjust for margins */
line_rect.x += line_display->x_offset * PANGO_SCALE;
line_rect.y += line_display->top_margin * PANGO_SCALE;
baseline += line_display->top_margin * PANGO_SCALE;
/* Selection is the height of the line, plus top/bottom
* margin if we're the first/last line
*/
selection_y = y + PANGO_PIXELS (first_y) + line_display->top_margin;
selection_height = PANGO_PIXELS (last_y) - PANGO_PIXELS (first_y);
if (first)
{
selection_y -= line_display->top_margin;
selection_height += line_display->top_margin;
}
if (pango_layout_iter_at_last_line (iter))
selection_height += line_display->bottom_margin;
first = FALSE;
if (selection_start_index < byte_offset &&
selection_end_index > line->length + byte_offset) /* All selected */
{
gdk_draw_rectangle (drawable,
bg_gc,
TRUE,
x + line_display->left_margin,
selection_y,
screen_width,
selection_height);
render_layout_line (drawable, render_state, line, &shaped_pointer,
x + PANGO_PIXELS (line_rect.x),
y + PANGO_PIXELS (baseline),
TRUE,
widgets);
}
else
{
GSList *shaped_pointer_tmp = shaped_pointer;
render_layout_line (drawable, render_state,
line, &shaped_pointer,
x + PANGO_PIXELS (line_rect.x),
y + PANGO_PIXELS (baseline),
FALSE,
widgets);
if (selection_start_index <= byte_offset + line->length &&
selection_end_index > byte_offset) /* Some selected */
{
GdkRegion *clip_region = get_selected_clip (render_state, layout, line,
x + line_display->x_offset,
selection_y,
selection_height,
selection_start_index, selection_end_index);
gdk_gc_set_clip_region (fg_gc, clip_region);
gdk_gc_set_clip_region (bg_gc, clip_region);
gdk_draw_rectangle (drawable,
bg_gc,
TRUE,
x + PANGO_PIXELS (line_rect.x),
selection_y,
PANGO_PIXELS (line_rect.width),
selection_height);
render_layout_line (drawable, render_state, line, &shaped_pointer_tmp,
x + PANGO_PIXELS (line_rect.x),
y + PANGO_PIXELS (baseline),
TRUE,
widgets);
gdk_gc_set_clip_region (fg_gc, NULL);
gdk_gc_set_clip_region (bg_gc, NULL);
gdk_region_destroy (clip_region);
/* Paint in the ends of the line */
if (line_rect.x > line_display->left_margin * PANGO_SCALE &&
((line_display->direction == GTK_TEXT_DIR_LTR && selection_start_index < byte_offset) ||
(line_display->direction == GTK_TEXT_DIR_RTL && selection_end_index > byte_offset + line->length)))
{
gdk_draw_rectangle (drawable,
bg_gc,
TRUE,
x + line_display->left_margin,
selection_y,
PANGO_PIXELS (line_rect.x) - line_display->left_margin,
selection_height);
}
if (line_rect.x + line_rect.width <
(screen_width + line_display->left_margin) * PANGO_SCALE &&
((line_display->direction == GTK_TEXT_DIR_LTR && selection_end_index > byte_offset + line->length) ||
(line_display->direction == GTK_TEXT_DIR_RTL && selection_start_index < byte_offset)))
{
int nonlayout_width;
nonlayout_width =
line_display->left_margin + screen_width -
PANGO_PIXELS (line_rect.x) - PANGO_PIXELS (line_rect.width);
gdk_draw_rectangle (drawable,
bg_gc,
TRUE,
x + PANGO_PIXELS (line_rect.x) + PANGO_PIXELS (line_rect.width),
selection_y,
nonlayout_width,
selection_height);
}
}
}
byte_offset += line->length;
}
while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
}
static GdkRegion *
get_selected_clip (GtkTextRenderState *render_state,
PangoLayout *layout,
PangoLayoutLine *line,
int x,
int y,
int height,
int start_index,
int end_index)
{
gint *ranges;
gint n_ranges, i;
GdkRegion *clip_region = gdk_region_new ();
GdkRegion *tmp_region;
pango_layout_line_get_x_ranges (line, start_index, end_index, &ranges, &n_ranges);
for (i=0; i < n_ranges; i++)
{
GdkRectangle rect;
rect.x = x + PANGO_PIXELS (ranges[2*i]);
rect.y = y;
rect.width = PANGO_PIXELS (ranges[2*i + 1]) - PANGO_PIXELS (ranges[2*i]);
rect.height = height;
gdk_region_union_with_rect (clip_region, &rect);
}
tmp_region = gdk_region_rectangle (&render_state->clip_rect);
gdk_region_intersect (clip_region, tmp_region);
gdk_region_destroy (tmp_region);
g_free (ranges);
return clip_region;
}
static void
get_item_properties (PangoItem *item,
GtkTextAppearance **appearance)
{
GSList *tmp_list = item->analysis.extra_attrs;
*appearance = NULL;
while (tmp_list)
{
PangoAttribute *attr = tmp_list->data;
if (attr->klass->type == gtk_text_attr_appearance_type)
{
*appearance = &((GtkTextAttrAppearance *)attr)->appearance;
}
tmp_list = tmp_list->next;
}
}
void
gtk_text_layout_draw (GtkTextLayout *layout,
GtkWidget *widget,
GdkDrawable *drawable,
GdkGC *cursor_gc,
/* Location of the drawable
in layout coordinates */
gint x_offset,
gint y_offset,
/* Region of the layout to
render */
gint x,
gint y,
gint width,
gint height,
/* widgets to expose */
GList **widgets)
{
GdkRectangle clip;
gint current_y;
GSList *cursor_list;
GtkTextRenderState *render_state;
GtkTextIter selection_start, selection_end;
gboolean have_selection = FALSE;
GSList *line_list;
GSList *tmp_list;
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
g_return_if_fail (layout->default_style != NULL);
g_return_if_fail (layout->buffer != NULL);
g_return_if_fail (drawable != NULL);
g_return_if_fail (width >= 0);
g_return_if_fail (height >= 0);
if (width == 0 || height == 0)
return;
line_list = gtk_text_layout_get_lines (layout, y + y_offset, y + y_offset + height, &current_y);
current_y -= y_offset;
if (line_list == NULL)
return; /* nothing on the screen */
clip.x = x;
clip.y = y;
clip.width = width;
clip.height = height;
render_state = gtk_text_render_state_new (widget, drawable, &clip);
gdk_gc_set_clip_rectangle (render_state->fg_gc, &clip);
gdk_gc_set_clip_rectangle (render_state->bg_gc, &clip);
gtk_text_layout_wrap_loop_start (layout);
if (gtk_text_buffer_get_selection_bounds (layout->buffer,
&selection_start,
&selection_end))
have_selection = TRUE;
tmp_list = line_list;
while (tmp_list != NULL)
{
GtkTextLineDisplay *line_display;
gint selection_start_index = -1;
gint selection_end_index = -1;
gboolean have_strong;
gboolean have_weak;
GtkTextLine *line = tmp_list->data;
line_display = gtk_text_layout_get_line_display (layout, line, FALSE);
if (line_display->height > 0)
{
g_assert (line_display->layout != NULL);
if (have_selection)
{
GtkTextIter line_start, line_end;
gint byte_count;
gtk_text_layout_get_iter_at_line (layout,
&line_start,
line, 0);
line_end = line_start;
if (!gtk_text_iter_ends_line (&line_end))
gtk_text_iter_forward_to_line_end (&line_end);
byte_count = gtk_text_iter_get_visible_line_index (&line_end);
if (gtk_text_iter_compare (&selection_start, &line_end) <= 0 &&
gtk_text_iter_compare (&selection_end, &line_start) >= 0)
{
if (gtk_text_iter_compare (&selection_start, &line_start) >= 0)
selection_start_index = gtk_text_iter_get_visible_line_index (&selection_start);
else
selection_start_index = -1;
if (gtk_text_iter_compare (&selection_end, &line_end) <= 0)
selection_end_index = gtk_text_iter_get_visible_line_index (&selection_end);
else
selection_end_index = MAX(byte_count, 1);
}
}
render_para (drawable, render_state, line_display,
- x_offset,
current_y,
selection_start_index, selection_end_index,
widgets);
/* We paint the cursors last, because they overlap another chunk
and need to appear on top. */
have_strong = FALSE;
have_weak = FALSE;
cursor_list = line_display->cursors;
while (cursor_list)
{
GtkTextCursorDisplay *cursor = cursor_list->data;
if (cursor->is_strong)
have_strong = TRUE;
else
have_weak = TRUE;
cursor_list = cursor_list->next;
}
cursor_list = line_display->cursors;
while (cursor_list)
{
GtkTextCursorDisplay *cursor = cursor_list->data;
GtkTextDirection dir;
GdkRectangle cursor_location;
dir = line_display->direction;
if (have_strong && have_weak)
{
if (!cursor->is_strong)
dir = (dir == GTK_TEXT_DIR_RTL) ? GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
}
cursor_location.x = line_display->x_offset + cursor->x - x_offset;
cursor_location.y = current_y + line_display->top_margin + cursor->y;
cursor_location.width = 0;
cursor_location.height = cursor->height;
gtk_draw_insertion_cursor (widget, drawable, &clip, &cursor_location,
cursor->is_strong,
dir, have_strong && have_weak);
cursor_list = cursor_list->next;
}
} /* line_display->height > 0 */
current_y += line_display->height;
gtk_text_layout_free_line_display (layout, line_display);
render_state->last_appearance = NULL;
render_state->last_bg_appearance = NULL;
tmp_list = g_slist_next (tmp_list);
}
gtk_text_layout_wrap_loop_end (layout);
gtk_text_render_state_destroy (render_state);
g_slist_free (line_list);
}
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