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gtk/gtk/gtktextdisplay.c
Benjamin Otte 3d506df234 gdk: Deprecate all drawing functions 
These functions will be gone in Gtk 3.0 and be replaced by Cairo
functions.

Includes not disabling deprecated functions in old widgets that aren't
going to be ported.
2010-08-07 15:35:51 +02:00

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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
#undef GDK_DISABLE_DEPRECATED
#include "config.h"
#include "gtktextdisplay.h"
#include "gtkintl.h"
#include "gtkalias.h"
/* DO NOT go putting private headers in here. This file should only
* use the semi-public headers, as with gtktextview.c.
*/
#define GTK_TYPE_TEXT_RENDERER (_gtk_text_renderer_get_type())
#define GTK_TEXT_RENDERER(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GTK_TYPE_TEXT_RENDERER, GtkTextRenderer))
#define GTK_IS_TEXT_RENDERER(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GTK_TYPE_TEXT_RENDERER))
#define GTK_TEXT_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_TEXT_RENDERER, GtkTextRendererClass))
#define GTK_IS_TEXT_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_TEXT_RENDERER))
#define GTK_TEXT_RENDERER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_TEXT_RENDERER, GtkTextRendererClass))
typedef struct _GtkTextRenderer GtkTextRenderer;
typedef struct _GtkTextRendererClass GtkTextRendererClass;
enum {
NORMAL,
SELECTED,
CURSOR
};
struct _GtkTextRenderer
{
GdkPangoRenderer parent_instance;
GdkScreen *screen;
GtkWidget *widget;
GdkDrawable *drawable;
GdkRectangle clip_rect;
GdkColor *error_color; /* Error underline color for this widget */
GList *widgets; /* widgets encountered when drawing */
int state;
};
struct _GtkTextRendererClass
{
GdkPangoRendererClass parent_class;
};
G_DEFINE_TYPE (GtkTextRenderer, _gtk_text_renderer, GDK_TYPE_PANGO_RENDERER)
static GdkColor *
text_renderer_get_error_color (GtkTextRenderer *text_renderer)
{
static const GdkColor red = { 0, 0xffff, 0, 0 };
if (!text_renderer->error_color)
gtk_widget_style_get (text_renderer->widget,
"error-underline-color", &text_renderer->error_color,
NULL);
if (!text_renderer->error_color)
text_renderer->error_color = gdk_color_copy (&red);
return text_renderer->error_color;
}
static void
text_renderer_set_gdk_color (GtkTextRenderer *text_renderer,
PangoRenderPart part,
GdkColor *gdk_color)
{
PangoRenderer *renderer = PANGO_RENDERER (text_renderer);
if (gdk_color)
{
PangoColor color;
color.red = gdk_color->red;
color.green = gdk_color->green;
color.blue = gdk_color->blue;
pango_renderer_set_color (renderer, part, &color);
}
else
pango_renderer_set_color (renderer, part, NULL);
}
static GtkTextAppearance *
get_item_appearance (PangoItem *item)
{
GSList *tmp_list = item->analysis.extra_attrs;
while (tmp_list)
{
PangoAttribute *attr = tmp_list->data;
if (attr->klass->type == gtk_text_attr_appearance_type)
return &((GtkTextAttrAppearance *)attr)->appearance;
tmp_list = tmp_list->next;
}
return NULL;
}
static void
gtk_text_renderer_prepare_run (PangoRenderer *renderer,
PangoLayoutRun *run)
{
GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
GdkPangoRenderer *gdk_renderer = GDK_PANGO_RENDERER (renderer);
GdkColor *bg_color, *fg_color, *underline_color;
GdkPixmap *fg_stipple, *bg_stipple;
GtkTextAppearance *appearance;
PANGO_RENDERER_CLASS (_gtk_text_renderer_parent_class)->prepare_run (renderer, run);
appearance = get_item_appearance (run->item);
g_assert (appearance != NULL);
if (appearance->draw_bg && text_renderer->state == NORMAL)
bg_color = &appearance->bg_color;
else
bg_color = NULL;
text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_BACKGROUND, bg_color);
if (text_renderer->state == SELECTED)
{
if (gtk_widget_has_focus (text_renderer->widget))
fg_color = &text_renderer->widget->style->text[GTK_STATE_SELECTED];
else
fg_color = &text_renderer->widget->style->text[GTK_STATE_ACTIVE];
}
else if (text_renderer->state == CURSOR && gtk_widget_has_focus (text_renderer->widget))
fg_color = &text_renderer->widget->style->base[GTK_STATE_NORMAL];
else
fg_color = &appearance->fg_color;
text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_FOREGROUND, fg_color);
text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_STRIKETHROUGH, fg_color);
if (appearance->underline == PANGO_UNDERLINE_ERROR)
underline_color = text_renderer_get_error_color (text_renderer);
else
underline_color = fg_color;
text_renderer_set_gdk_color (text_renderer, PANGO_RENDER_PART_UNDERLINE, underline_color);
fg_stipple = appearance->fg_stipple;
if (fg_stipple && text_renderer->screen != gdk_drawable_get_screen (fg_stipple))
{
g_warning ("gtk_text_renderer_prepare_run:\n"
"The foreground stipple bitmap has been created on the wrong screen.\n"
"Ignoring the stipple bitmap information.");
fg_stipple = NULL;
}
gdk_pango_renderer_set_stipple (gdk_renderer, PANGO_RENDER_PART_FOREGROUND, fg_stipple);
gdk_pango_renderer_set_stipple (gdk_renderer, PANGO_RENDER_PART_STRIKETHROUGH, fg_stipple);
gdk_pango_renderer_set_stipple (gdk_renderer, PANGO_RENDER_PART_UNDERLINE, fg_stipple);
bg_stipple = appearance->draw_bg ? appearance->bg_stipple : NULL;
if (bg_stipple && text_renderer->screen != gdk_drawable_get_screen (bg_stipple))
{
g_warning ("gtk_text_renderer_prepare_run:\n"
"The background stipple bitmap has been created on the wrong screen.\n"
"Ignoring the stipple bitmap information.");
bg_stipple = NULL;
}
gdk_pango_renderer_set_stipple (gdk_renderer, PANGO_RENDER_PART_BACKGROUND, bg_stipple);
}
static void
gtk_text_renderer_draw_shape (PangoRenderer *renderer,
PangoAttrShape *attr,
int x,
int y)
{
GtkTextRenderer *text_renderer = GTK_TEXT_RENDERER (renderer);
GdkGC *fg_gc;
if (text_renderer->state == SELECTED)
{
if (gtk_widget_has_focus (text_renderer->widget))
fg_gc = text_renderer->widget->style->text_gc[GTK_STATE_SELECTED];
else
fg_gc = text_renderer->widget->style->text_gc[GTK_STATE_SELECTED];
}
else if (text_renderer->state == CURSOR && gtk_widget_has_focus (text_renderer->widget))
fg_gc = text_renderer->widget->style->base_gc[GTK_STATE_NORMAL];
else
fg_gc = text_renderer->widget->style->text_gc[GTK_STATE_NORMAL];
if (attr->data == NULL)
{
/* This happens if we have an empty widget anchor. Draw
* something empty-looking.
*/
GdkRectangle shape_rect, draw_rect;
shape_rect.x = PANGO_PIXELS (x);
shape_rect.y = PANGO_PIXELS (y + attr->logical_rect.y);
shape_rect.width = PANGO_PIXELS (x + attr->logical_rect.width) - shape_rect.x;
shape_rect.height = PANGO_PIXELS (y + attr->logical_rect.y + attr->logical_rect.height) - shape_rect.y;
if (gdk_rectangle_intersect (&shape_rect, &text_renderer->clip_rect,
&draw_rect))
{
gdk_draw_rectangle (text_renderer->drawable, fg_gc,
FALSE, shape_rect.x, shape_rect.y,
shape_rect.width, shape_rect.height);
gdk_draw_line (text_renderer->drawable, fg_gc,
shape_rect.x, shape_rect.y,
shape_rect.x + shape_rect.width,
shape_rect.y + shape_rect.height);
gdk_draw_line (text_renderer->drawable, fg_gc,
shape_rect.x + shape_rect.width, shape_rect.y,
shape_rect.x,
shape_rect.y + shape_rect.height);
}
}
else if (GDK_IS_PIXBUF (attr->data))
{
gint width, height;
GdkRectangle pixbuf_rect, draw_rect;
GdkPixbuf *pixbuf;
pixbuf = GDK_PIXBUF (attr->data);
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
pixbuf_rect.x = PANGO_PIXELS (x);
pixbuf_rect.y = PANGO_PIXELS (y) - height;
pixbuf_rect.width = width;
pixbuf_rect.height = height;
if (gdk_rectangle_intersect (&pixbuf_rect, &text_renderer->clip_rect,
&draw_rect))
{
gdk_draw_pixbuf (text_renderer->drawable,
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);
}
}
else if (GTK_IS_WIDGET (attr->data))
{
GtkWidget *widget;
widget = GTK_WIDGET (attr->data);
text_renderer->widgets = g_list_prepend (text_renderer->widgets,
g_object_ref (widget));
}
else
g_assert_not_reached (); /* not a pixbuf or widget */
}
static void
gtk_text_renderer_finalize (GObject *object)
{
G_OBJECT_CLASS (_gtk_text_renderer_parent_class)->finalize (object);
}
static void
_gtk_text_renderer_init (GtkTextRenderer *renderer)
{
}
static void
_gtk_text_renderer_class_init (GtkTextRendererClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PangoRendererClass *renderer_class = PANGO_RENDERER_CLASS (klass);
renderer_class->prepare_run = gtk_text_renderer_prepare_run;
renderer_class->draw_shape = gtk_text_renderer_draw_shape;
object_class->finalize = gtk_text_renderer_finalize;
}
static void
text_renderer_set_state (GtkTextRenderer *text_renderer,
int state)
{
text_renderer->state = state;
}
static void
text_renderer_begin (GtkTextRenderer *text_renderer,
GtkWidget *widget,
GdkDrawable *drawable,
GdkRectangle *clip_rect)
{
text_renderer->widget = widget;
text_renderer->drawable = drawable;
text_renderer->clip_rect = *clip_rect;
gdk_pango_renderer_set_drawable (GDK_PANGO_RENDERER (text_renderer), drawable);
gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer),
widget->style->text_gc[widget->state]);
}
/* Returns a GSList of (referenced) widgets encountered while drawing.
*/
static GList *
text_renderer_end (GtkTextRenderer *text_renderer)
{
GList *widgets = text_renderer->widgets;
text_renderer->widget = NULL;
text_renderer->drawable = NULL;
text_renderer->widgets = NULL;
if (text_renderer->error_color)
{
gdk_color_free (text_renderer->error_color);
text_renderer->error_color = NULL;
}
gdk_pango_renderer_set_drawable (GDK_PANGO_RENDERER (text_renderer), NULL);
gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), NULL);
return widgets;
}
static GdkRegion *
get_selected_clip (GtkTextRenderer *text_renderer,
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 (&text_renderer->clip_rect);
gdk_region_intersect (clip_region, tmp_region);
gdk_region_destroy (tmp_region);
g_free (ranges);
return clip_region;
}
static void
render_para (GtkTextRenderer *text_renderer,
GtkTextLineDisplay *line_display,
/* Top-left corner of paragraph including all margins */
int x,
int y,
int selection_start_index,
int selection_end_index)
{
PangoLayout *layout = line_display->layout;
int byte_offset = 0;
PangoLayoutIter *iter;
PangoRectangle layout_logical;
int screen_width;
GdkGC *selection_gc, *fg_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 (text_renderer->widget))
state = GTK_STATE_SELECTED;
else
state = GTK_STATE_ACTIVE;
selection_gc = text_renderer->widget->style->base_gc [state];
fg_gc = text_renderer->widget->style->text_gc[text_renderer->widget->state];
do
{
PangoLayoutLine *line = pango_layout_iter_get_line_readonly (iter);
int selection_y, selection_height;
int first_y, last_y;
PangoRectangle line_rect;
int baseline;
gboolean at_last_line;
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;
}
at_last_line = pango_layout_iter_at_last_line (iter);
if (at_last_line)
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 (text_renderer->drawable,
selection_gc,
TRUE,
x + line_display->left_margin,
selection_y,
screen_width,
selection_height);
text_renderer_set_state (text_renderer, SELECTED);
pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
line,
PANGO_SCALE * x + line_rect.x,
PANGO_SCALE * y + baseline);
}
else
{
if (line_display->pg_bg_color)
{
GdkGC *bg_gc;
bg_gc = gdk_gc_new (text_renderer->drawable);
gdk_gc_set_fill (bg_gc, GDK_SOLID);
gdk_gc_set_rgb_fg_color (bg_gc, line_display->pg_bg_color);
gdk_draw_rectangle (text_renderer->drawable,
bg_gc,
TRUE,
x + line_display->left_margin,
selection_y,
screen_width,
selection_height);
g_object_unref (bg_gc);
}
text_renderer_set_state (text_renderer, NORMAL);
pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
line,
PANGO_SCALE * x + line_rect.x,
PANGO_SCALE * y + baseline);
/* Check if some part of the line is selected; the newline
* that is after line->length for the last line of the
* paragraph counts as part of the line for this
*/
if ((selection_start_index < byte_offset + line->length ||
(selection_start_index == byte_offset + line->length && pango_layout_iter_at_last_line (iter))) &&
selection_end_index > byte_offset)
{
GdkRegion *clip_region = get_selected_clip (text_renderer, layout, line,
x + line_display->x_offset,
selection_y,
selection_height,
selection_start_index, selection_end_index);
/* When we change the clip on the foreground GC, we have to set
* it on the rendererer again, since the rendererer might have
* copied the GC to change attributes.
*/
gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), NULL);
gdk_gc_set_clip_region (selection_gc, clip_region);
gdk_gc_set_clip_region (fg_gc, clip_region);
gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), fg_gc);
gdk_draw_rectangle (text_renderer->drawable,
selection_gc,
TRUE,
x + PANGO_PIXELS (line_rect.x),
selection_y,
PANGO_PIXELS (line_rect.width),
selection_height);
text_renderer_set_state (text_renderer, SELECTED);
pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
line,
PANGO_SCALE * x + line_rect.x,
PANGO_SCALE * y + baseline);
gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), NULL);
gdk_gc_set_clip_region (selection_gc, NULL);
gdk_gc_set_clip_region (fg_gc, NULL);
gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), fg_gc);
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 (text_renderer->drawable,
selection_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 (text_renderer->drawable,
selection_gc,
TRUE,
x + PANGO_PIXELS (line_rect.x) + PANGO_PIXELS (line_rect.width),
selection_y,
nonlayout_width,
selection_height);
}
}
else if (line_display->has_block_cursor &&
gtk_widget_has_focus (text_renderer->widget) &&
byte_offset <= line_display->insert_index &&
(line_display->insert_index < byte_offset + line->length ||
(at_last_line && line_display->insert_index == byte_offset + line->length)))
{
GdkRectangle cursor_rect;
GdkGC *cursor_gc;
/* we draw text using base color on filled cursor rectangle of cursor color
* (normally white on black) */
cursor_gc = _gtk_widget_get_cursor_gc (text_renderer->widget);
cursor_rect.x = x + line_display->x_offset + line_display->block_cursor.x;
cursor_rect.y = y + line_display->block_cursor.y + line_display->top_margin;
cursor_rect.width = line_display->block_cursor.width;
cursor_rect.height = line_display->block_cursor.height;
gdk_gc_set_clip_rectangle (cursor_gc, &cursor_rect);
gdk_draw_rectangle (text_renderer->drawable,
cursor_gc,
TRUE,
cursor_rect.x,
cursor_rect.y,
cursor_rect.width,
cursor_rect.height);
gdk_gc_set_clip_region (cursor_gc, NULL);
/* draw text under the cursor if any */
if (!line_display->cursor_at_line_end)
{
GdkGC *cursor_text_gc;
cursor_text_gc = text_renderer->widget->style->base_gc[text_renderer->widget->state];
gdk_gc_set_clip_rectangle (cursor_text_gc, &cursor_rect);
gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), cursor_text_gc);
text_renderer_set_state (text_renderer, CURSOR);
pango_renderer_draw_layout_line (PANGO_RENDERER (text_renderer),
line,
PANGO_SCALE * x + line_rect.x,
PANGO_SCALE * y + baseline);
gdk_pango_renderer_set_gc (GDK_PANGO_RENDERER (text_renderer), fg_gc);
gdk_gc_set_clip_region (cursor_text_gc, NULL);
}
}
}
byte_offset += line->length;
}
while (pango_layout_iter_next_line (iter));
pango_layout_iter_free (iter);
}
static void
on_renderer_display_closed (GdkDisplay *display,
gboolean is_error,
GtkTextRenderer *text_renderer)
{
g_signal_handlers_disconnect_by_func (text_renderer->screen,
(gpointer)on_renderer_display_closed,
text_renderer);
g_object_set_data (G_OBJECT (text_renderer->screen), I_("gtk-text-renderer"), NULL);
}
static GtkTextRenderer *
get_text_renderer (GdkScreen *screen)
{
GtkTextRenderer *text_renderer;
g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
text_renderer = g_object_get_data (G_OBJECT (screen), "gtk-text-renderer");
if (!text_renderer)
{
text_renderer = g_object_new (GTK_TYPE_TEXT_RENDERER, "screen", screen, NULL);
text_renderer->screen = screen;
g_object_set_data_full (G_OBJECT (screen), I_("gtk-text-renderer"), text_renderer,
(GDestroyNotify)g_object_unref);
g_signal_connect_object (gdk_screen_get_display (screen), "closed",
G_CALLBACK (on_renderer_display_closed),
text_renderer, 0);
}
return text_renderer;
}
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;
GtkTextRenderer *text_renderer;
GtkTextIter selection_start, selection_end;
gboolean have_selection = FALSE;
GSList *line_list;
GSList *tmp_list;
GList *tmp_widgets;
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;
text_renderer = get_text_renderer (gdk_drawable_get_screen (drawable));
text_renderer_begin (text_renderer, widget, drawable, &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 = byte_count + 1; /* + 1 to flag past-the-end */
}
}
render_para (text_renderer, line_display,
- x_offset,
current_y,
selection_start_index, selection_end_index);
/* 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);
tmp_list = g_slist_next (tmp_list);
}
gtk_text_layout_wrap_loop_end (layout);
tmp_widgets = text_renderer_end (text_renderer);
if (widgets)
*widgets = tmp_widgets;
else
{
g_list_foreach (tmp_widgets, (GFunc)g_object_unref, NULL);
g_list_free (tmp_widgets);
}
g_slist_free (line_list);
}
#define __GTK_TEXT_DISPLAY_C__
#include "gtkaliasdef.c"
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