gtk2/gtk/gtkcssimagerecolor.c
2019-11-14 09:15:58 +01:00

331 lines
9.5 KiB
C

/*
* Copyright © 2016 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: Matthias Clasen <mclasen@redhat.com>
*/
#include "config.h"
#include "gtkcssimagerecolorprivate.h"
#include "gtkcssimageprivate.h"
#include "gtkcsspalettevalueprivate.h"
#include "gtkcssrgbavalueprivate.h"
#include "gtkiconthemeprivate.h"
#include "gdkpixbufutilsprivate.h"
#include "gtkstyleproviderprivate.h"
G_DEFINE_TYPE (GtkCssImageRecolor, _gtk_css_image_recolor, GTK_TYPE_CSS_IMAGE)
static void
gtk_css_image_recolor_print (GtkCssImage *image,
GString *string)
{
GtkCssImageRecolor *recolor = GTK_CSS_IMAGE_RECOLOR (image);
char *uri;
g_string_append (string, "-gtk-recolor(url(");
uri = g_file_get_uri (recolor->file);
g_string_append (string, uri);
g_free (uri);
g_string_append (string, ")");
if (recolor->palette)
{
g_string_append (string, ",");
_gtk_css_value_print (recolor->palette, string);
}
g_string_append (string, ")");
}
static void
gtk_css_image_recolor_dispose (GObject *object)
{
GtkCssImageRecolor *recolor = GTK_CSS_IMAGE_RECOLOR (object);
g_clear_pointer (&recolor->palette, _gtk_css_value_unref);
g_clear_object (&recolor->file);
g_clear_object (&recolor->texture);
G_OBJECT_CLASS (_gtk_css_image_recolor_parent_class)->dispose (object);
}
static void
lookup_symbolic_colors (GtkCssStyle *style,
GtkCssValue *palette,
GdkRGBA *color_out,
GdkRGBA *success_out,
GdkRGBA *warning_out,
GdkRGBA *error_out)
{
GtkCssValue *color;
const GdkRGBA *lookup;
color = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_COLOR);
*color_out = *_gtk_css_rgba_value_get_rgba (color);
lookup = gtk_css_palette_value_get_color (palette, "success");
if (lookup)
*success_out = *lookup;
else
*success_out = *color_out;
lookup = gtk_css_palette_value_get_color (palette, "warning");
if (lookup)
*warning_out = *lookup;
else
*warning_out = *color_out;
lookup = gtk_css_palette_value_get_color (palette, "error");
if (lookup)
*error_out = *lookup;
else
*error_out = *color_out;
}
static void
gtk_css_image_recolor_load_texture (GtkCssImageRecolor *recolor,
GError **error)
{
char *uri;
if (recolor->texture)
return;
uri = g_file_get_uri (recolor->file);
if (g_file_has_uri_scheme (recolor->file, "resource"))
{
char *resource_path = g_uri_unescape_string (uri + strlen ("resource://"), NULL);
if (g_str_has_suffix (uri, ".symbolic.png"))
recolor->texture = gdk_texture_new_from_resource (resource_path);
else
recolor->texture = gtk_make_symbolic_texture_from_resource (resource_path, 0, 0, 1.0, NULL);
g_free (resource_path);
}
else
{
if (g_str_has_suffix (uri, ".symbolic.png"))
recolor->texture = gdk_texture_new_from_file (recolor->file, NULL);
else
recolor->texture = gtk_make_symbolic_texture_from_file (recolor->file, 0, 0, 1.0, NULL);
}
g_free (uri);
}
static GtkCssImage *
gtk_css_image_recolor_load (GtkCssImageRecolor *recolor,
GtkCssStyle *style,
GtkCssValue *palette,
gint scale,
GError **gerror)
{
GError *local_error = NULL;
GtkCssImageRecolor *image;
image = g_object_new (GTK_TYPE_CSS_IMAGE_RECOLOR, NULL);
lookup_symbolic_colors (style, palette, &image->color, &image->success, &image->warning, &image->error);
gtk_css_image_recolor_load_texture (recolor, &local_error);
image->file = g_object_ref (recolor->file);
if (recolor->texture)
image->texture = g_object_ref (recolor->texture);
else
{
if (gerror)
{
char *uri;
uri = g_file_get_uri (recolor->file);
g_set_error (gerror,
GTK_CSS_PARSER_ERROR,
GTK_CSS_PARSER_ERROR_FAILED,
"Error loading image '%s': %s", uri, local_error ? local_error->message : "");
g_free (uri);
}
}
g_clear_error (&local_error);
return GTK_CSS_IMAGE (image);
}
static void
gtk_css_image_recolor_snapshot (GtkCssImage *image,
GtkSnapshot *snapshot,
double width,
double height)
{
GtkCssImageRecolor *recolor = GTK_CSS_IMAGE_RECOLOR (image);
const GdkRGBA *fg = &recolor->color;
const GdkRGBA *sc = &recolor->success;
const GdkRGBA *wc = &recolor->warning;
const GdkRGBA *ec = &recolor->error;
graphene_matrix_t matrix;
graphene_vec4_t offset;
if (recolor->texture == NULL)
return;
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,
recolor->texture,
&GRAPHENE_RECT_INIT (0, 0, width, height));
gtk_snapshot_pop (snapshot);
}
static GtkCssImage *
gtk_css_image_recolor_compute (GtkCssImage *image,
guint property_id,
GtkStyleProvider *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
GtkCssImageRecolor *recolor = GTK_CSS_IMAGE_RECOLOR (image);
GtkCssValue *palette;
GtkCssImage *img;
int scale;
GError *error = NULL;
scale = gtk_style_provider_get_scale (provider);
if (recolor->palette)
palette = _gtk_css_value_compute (recolor->palette, property_id, provider, style, parent_style);
else
palette = _gtk_css_value_ref (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_ICON_PALETTE));
img = gtk_css_image_recolor_load (recolor, style, palette, scale, &error);
if (error)
{
GtkCssSection *section = gtk_css_style_get_section (style, property_id);
gtk_style_provider_emit_error (provider, section, error);
g_error_free (error);
}
_gtk_css_value_unref (palette);
return img;
}
static guint
gtk_css_image_recolor_parse_arg (GtkCssParser *parser,
guint arg,
gpointer data)
{
GtkCssImageRecolor *self = data;
switch (arg)
{
case 0:
{
char *url = gtk_css_parser_consume_url (parser);
if (url == NULL)
return 0;
self->file = gtk_css_parser_resolve_url (parser, url);
g_free (url);
if (self->file == NULL)
return 0;
return 1;
}
case 1:
self->palette = gtk_css_palette_value_parse (parser);
if (self->palette == NULL)
return 0;
return 1;
default:
g_assert_not_reached ();
return 0;
}
}
static gboolean
gtk_css_image_recolor_parse (GtkCssImage *image,
GtkCssParser *parser)
{
if (!gtk_css_parser_has_function (parser, "-gtk-recolor"))
{
gtk_css_parser_error_syntax (parser, "Expected '-gtk-recolor('");
return FALSE;
}
return gtk_css_parser_consume_function (parser, 1, 2, gtk_css_image_recolor_parse_arg, image);
}
static int
gtk_css_image_recolor_get_width (GtkCssImage *image)
{
GtkCssImageRecolor *recolor = GTK_CSS_IMAGE_RECOLOR (image);
gtk_css_image_recolor_load_texture (recolor, NULL);
if (recolor->texture == NULL)
return 0;
return gdk_texture_get_width (recolor->texture);
}
static int
gtk_css_image_recolor_get_height (GtkCssImage *image)
{
GtkCssImageRecolor *recolor = GTK_CSS_IMAGE_RECOLOR (image);
gtk_css_image_recolor_load_texture (recolor, NULL);
if (recolor->texture == NULL)
return 0;
return gdk_texture_get_height (recolor->texture);
}
static void
_gtk_css_image_recolor_class_init (GtkCssImageRecolorClass *klass)
{
GtkCssImageClass *image_class = GTK_CSS_IMAGE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
image_class->get_width = gtk_css_image_recolor_get_width;
image_class->get_height = gtk_css_image_recolor_get_height;
image_class->compute = gtk_css_image_recolor_compute;
image_class->snapshot = gtk_css_image_recolor_snapshot;
image_class->parse = gtk_css_image_recolor_parse;
image_class->print = gtk_css_image_recolor_print;
object_class->dispose = gtk_css_image_recolor_dispose;
}
static void
_gtk_css_image_recolor_init (GtkCssImageRecolor *image_recolor)
{
}