gtk2/gtk/gtkcssimageicontheme.c
Timm Bäder 6821fe0c13 icontheme: Add error argument to _load_texture
Loading an icon might fail.
2019-09-09 17:36:26 +02:00

234 lines
7.8 KiB
C

/*
* Copyright © 2012 Red Hat Inc.
*
* 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 2.1 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, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtkcssimageiconthemeprivate.h"
#include <math.h>
#include "gtkcssiconthemevalueprivate.h"
#include "gtkcssrgbavalueprivate.h"
#include "gtksettingsprivate.h"
#include "gtksnapshot.h"
#include "gtkstyleproviderprivate.h"
#include "gtkiconthemeprivate.h"
G_DEFINE_TYPE (GtkCssImageIconTheme, _gtk_css_image_icon_theme, GTK_TYPE_CSS_IMAGE)
static double
gtk_css_image_icon_theme_get_aspect_ratio (GtkCssImage *image)
{
/* icon theme icons only take a single size when requesting, so we insist on being square */
return 1.0;
}
static void
gtk_css_image_icon_theme_snapshot (GtkCssImage *image,
GtkSnapshot *snapshot,
double width,
double height)
{
GtkCssImageIconTheme *icon_theme = GTK_CSS_IMAGE_ICON_THEME (image);
GdkTexture *texture;
double texture_width, texture_height;
gint size;
gboolean symbolic;
size = floor (MIN (width, height));
if (size <= 0)
return;
if (size == icon_theme->cached_size &&
icon_theme->cached_texture != NULL)
{
texture = icon_theme->cached_texture;
symbolic = icon_theme->cached_symbolic;
}
else
{
GtkIconInfo *icon_info;
icon_info = gtk_icon_theme_lookup_icon_for_scale (icon_theme->icon_theme,
icon_theme->name,
size,
icon_theme->scale,
GTK_ICON_LOOKUP_USE_BUILTIN);
if (icon_info == NULL)
icon_info = gtk_icon_theme_lookup_icon (icon_theme->icon_theme,
"image-missing",
size,
GTK_ICON_LOOKUP_USE_BUILTIN | GTK_ICON_LOOKUP_GENERIC_FALLBACK);
g_assert (icon_info != NULL);
symbolic = gtk_icon_info_is_symbolic (icon_info);
texture = gtk_icon_info_load_texture (icon_info, NULL);
g_clear_object (&icon_theme->cached_texture);
icon_theme->cached_size = size;
icon_theme->cached_texture = texture;
icon_theme->cached_symbolic = symbolic;
g_object_unref (icon_info);
}
texture_width = (double) gdk_texture_get_width (texture) / icon_theme->scale;
texture_height = (double) gdk_texture_get_height (texture) / icon_theme->scale;
if (symbolic)
{
graphene_matrix_t matrix;
graphene_vec4_t offset;
GdkRGBA fg = icon_theme->color;
GdkRGBA sc = icon_theme->success;
GdkRGBA wc = icon_theme->warning;
GdkRGBA ec = icon_theme->error;
graphene_matrix_init_from_float (&matrix,
(float[16]) {
sc.red - fg.red, sc.green - fg.green, sc.blue - fg.blue, 0,
wc.red - fg.red, wc.green - fg.green, wc.blue - fg.blue, 0,
ec.red - fg.red, ec.green - fg.green, ec.blue - fg.blue, 0,
0, 0, 0, fg.alpha
});
graphene_vec4_init (&offset, fg.red, fg.green, fg.blue, 0);
gtk_snapshot_push_color_matrix (snapshot, &matrix, &offset);
}
gtk_snapshot_append_texture (snapshot,
texture,
&GRAPHENE_RECT_INIT(
(width - texture_width) / 2.0,
(height - texture_height) / 2.0,
texture_width,
texture_height
));
if (symbolic)
gtk_snapshot_pop (snapshot);
}
static guint
gtk_css_image_icon_theme_parse_arg (GtkCssParser *parser,
guint arg,
gpointer data)
{
GtkCssImageIconTheme *icon_theme = data;
icon_theme->name = gtk_css_parser_consume_string (parser);
if (icon_theme->name == NULL)
return 0;
return 1;
}
static gboolean
gtk_css_image_icon_theme_parse (GtkCssImage *image,
GtkCssParser *parser)
{
if (!gtk_css_parser_has_function (parser, "-gtk-icontheme"))
{
gtk_css_parser_error_syntax (parser, "Expected '-gtk-icontheme('");
return FALSE;
}
return gtk_css_parser_consume_function (parser, 1, 1, gtk_css_image_icon_theme_parse_arg, image);
}
static void
gtk_css_image_icon_theme_print (GtkCssImage *image,
GString *string)
{
GtkCssImageIconTheme *icon_theme = GTK_CSS_IMAGE_ICON_THEME (image);
g_string_append (string, "-gtk-icontheme(");
_gtk_css_print_string (string, icon_theme->name);
g_string_append (string, ")");
}
static GtkCssImage *
gtk_css_image_icon_theme_compute (GtkCssImage *image,
guint property_id,
GtkStyleProvider *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
GtkCssImageIconTheme *icon_theme = GTK_CSS_IMAGE_ICON_THEME (image);
GtkCssImageIconTheme *copy;
copy = g_object_new (GTK_TYPE_CSS_IMAGE_ICON_THEME, NULL);
copy->name = g_strdup (icon_theme->name);
copy->icon_theme = gtk_css_icon_theme_value_get_icon_theme (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_ICON_THEME));
copy->scale = gtk_style_provider_get_scale (provider);
gtk_icon_theme_lookup_symbolic_colors (style, &copy->color, &copy->success, &copy->warning, &copy->error);
return GTK_CSS_IMAGE (copy);
}
static gboolean
gtk_css_image_icon_theme_equal (GtkCssImage *image1,
GtkCssImage *image2)
{
GtkCssImageIconTheme *icon_theme1 = (GtkCssImageIconTheme *) image1;
GtkCssImageIconTheme *icon_theme2 = (GtkCssImageIconTheme *) image2;
return g_str_equal (icon_theme1->name, icon_theme2->name);
}
static void
gtk_css_image_icon_theme_dispose (GObject *object)
{
GtkCssImageIconTheme *icon_theme = GTK_CSS_IMAGE_ICON_THEME (object);
g_free (icon_theme->name);
icon_theme->name = NULL;
g_clear_object (&icon_theme->cached_texture);
G_OBJECT_CLASS (_gtk_css_image_icon_theme_parent_class)->dispose (object);
}
static void
_gtk_css_image_icon_theme_class_init (GtkCssImageIconThemeClass *klass)
{
GtkCssImageClass *image_class = GTK_CSS_IMAGE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
image_class->get_aspect_ratio = gtk_css_image_icon_theme_get_aspect_ratio;
image_class->snapshot = gtk_css_image_icon_theme_snapshot;
image_class->parse = gtk_css_image_icon_theme_parse;
image_class->print = gtk_css_image_icon_theme_print;
image_class->compute = gtk_css_image_icon_theme_compute;
image_class->equal = gtk_css_image_icon_theme_equal;
object_class->dispose = gtk_css_image_icon_theme_dispose;
}
static void
_gtk_css_image_icon_theme_init (GtkCssImageIconTheme *icon_theme)
{
icon_theme->icon_theme = gtk_icon_theme_get_default ();
icon_theme->scale = 1;
icon_theme->cached_size = -1;
icon_theme->cached_texture = NULL;
}