--- /dev/null
+/*
+ * 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 "gtkcssimagefallbackprivate.h"
+#include "gtkcssimagesurfaceprivate.h"
+#include "gtkcsscolorvalueprivate.h"
+#include "gtkcssrgbavalueprivate.h"
+
+#include "gtkstyleproviderprivate.h"
+
+G_DEFINE_TYPE (GtkCssImageFallback, _gtk_css_image_fallback, GTK_TYPE_CSS_IMAGE)
+
+static int
+gtk_css_image_fallback_get_width (GtkCssImage *image)
+{
+ GtkCssImageFallback *fallback = GTK_CSS_IMAGE_FALLBACK (image);
+
+ if (fallback->used < 0)
+ return 0;
+
+ return _gtk_css_image_get_width (fallback->images[fallback->used]);
+}
+
+static int
+gtk_css_image_fallback_get_height (GtkCssImage *image)
+{
+ GtkCssImageFallback *fallback = GTK_CSS_IMAGE_FALLBACK (image);
+
+ if (fallback->used < 0)
+ return 0;
+
+ return _gtk_css_image_get_height (fallback->images[fallback->used]);
+}
+
+static double
+gtk_css_image_fallback_get_aspect_ratio (GtkCssImage *image)
+{
+ GtkCssImageFallback *fallback = GTK_CSS_IMAGE_FALLBACK (image);
+
+ if (fallback->used < 0)
+ return 1;
+
+ return _gtk_css_image_get_aspect_ratio (fallback->images[fallback->used]);
+}
+
+static void
+gtk_css_image_fallback_draw (GtkCssImage *image,
+ cairo_t *cr,
+ double width,
+ double height)
+{
+ GtkCssImageFallback *fallback = GTK_CSS_IMAGE_FALLBACK (image);
+
+ if (fallback->used < 0)
+ {
+ if (fallback->color)
+ gdk_cairo_set_source_rgba (cr, _gtk_css_rgba_value_get_rgba (fallback->color));
+ else
+ cairo_set_source_rgb (cr, 1, 0, 9);
+
+ cairo_rectangle (cr, 0, 0, width, height);
+ cairo_fill (cr);
+ }
+ else
+ _gtk_css_image_draw (fallback->images[fallback->used], cr, width, height);
+}
+
+static void
+gtk_css_image_fallback_print (GtkCssImage *image,
+ GString *string)
+{
+ GtkCssImageFallback *fallback = GTK_CSS_IMAGE_FALLBACK (image);
+ int i;
+
+ g_string_append (string, "image(");
+ for (i = 0; i < fallback->n_images; i++)
+ {
+ if (i > 0)
+ g_string_append (string, ",");
+ _gtk_css_image_print (fallback->images[i], string);
+ }
+ if (fallback->color)
+ {
+ g_string_append (string, ",");
+ _gtk_css_value_print (fallback->color, string);
+ }
+
+ g_string_append (string, ")");
+}
+
+static void
+gtk_css_image_fallback_dispose (GObject *object)
+{
+ GtkCssImageFallback *fallback = GTK_CSS_IMAGE_FALLBACK (object);
+ int i;
+
+ for (i = 0; i < fallback->n_images; i++)
+ g_object_unref (fallback->images[i]);
+ g_free (fallback->images);
+ fallback->images = NULL;
+
+ if (fallback->color)
+ {
+ _gtk_css_value_unref (fallback->color);
+ fallback->color = NULL;
+ }
+
+ G_OBJECT_CLASS (_gtk_css_image_fallback_parent_class)->dispose (object);
+}
+
+
+static GtkCssImage *
+gtk_css_image_fallback_compute (GtkCssImage *image,
+ guint property_id,
+ GtkStyleProviderPrivate *provider,
+ GtkCssStyle *style,
+ GtkCssStyle *parent_style)
+{
+ GtkCssImageFallback *fallback = GTK_CSS_IMAGE_FALLBACK (image);
+ GtkCssImageFallback *copy;
+ int i;
+
+ if (fallback->used < 0)
+ {
+ copy = g_object_new (_gtk_css_image_fallback_get_type (), NULL);
+ copy->n_images = fallback->n_images;
+ copy->images = g_new (GtkCssImage *, fallback->n_images);
+ for (i = 0; i < fallback->n_images; i++)
+ {
+ copy->images[i] = _gtk_css_image_compute (fallback->images[i],
+ property_id,
+ provider,
+ style,
+ parent_style);
+
+ /* Assume that failing to load an image leaves a 0x0 surface image */
+ if (GTK_IS_CSS_IMAGE_SURFACE (copy->images[i]) &&
+ _gtk_css_image_get_width (copy->images[i]) == 0 &&
+ _gtk_css_image_get_height (copy->images[i]) == 0)
+ continue;
+
+ if (copy->used < 0)
+ copy->used = i;
+ }
+
+ if (fallback->color)
+ copy->color = _gtk_css_value_compute (fallback->color,
+ property_id,
+ provider,
+ style,
+ parent_style);
+ else
+ copy->color = NULL;
+
+ return GTK_CSS_IMAGE (copy);
+ }
+ else
+ return g_object_ref (fallback);
+}
+
+static gboolean
+gtk_css_image_fallback_parse (GtkCssImage *image,
+ GtkCssParser *parser)
+{
+ GtkCssImageFallback *fallback = GTK_CSS_IMAGE_FALLBACK (image);
+ GPtrArray *images;
+ GtkCssImage *child;
+
+ if (!_gtk_css_parser_try (parser, "image", TRUE))
+ {
+ _gtk_css_parser_error (parser, "'image'");
+ return FALSE;
+ }
+
+ if (!_gtk_css_parser_try (parser, "(", TRUE))
+ {
+ _gtk_css_parser_error (parser,
+ "Expected '(' after 'image'");
+ return FALSE;
+ }
+
+ images = g_ptr_array_new_with_free_func (g_object_unref);
+
+ do
+ {
+ child = NULL;
+ if (_gtk_css_image_can_parse (parser))
+ child = _gtk_css_image_new_parse (parser);
+ if (child == NULL)
+ {
+ fallback->color = _gtk_css_color_value_parse (parser);
+ if (fallback->color)
+ break;
+
+ g_ptr_array_free (images, TRUE);
+ return FALSE;
+ }
+ g_ptr_array_add (images, child);
+ }
+ while ( _gtk_css_parser_try (parser, ",", TRUE));
+
+ if (!_gtk_css_parser_try (parser, ")", TRUE))
+ {
+ g_ptr_array_free (images, TRUE);
+ _gtk_css_parser_error (parser,
+ "Expected ')' at end of 'image'");
+ return FALSE;
+ }
+
+ fallback->n_images = images->len;
+ fallback->images = (GtkCssImage **) g_ptr_array_free (images, FALSE);
+
+ return TRUE;
+}
+
+static void
+_gtk_css_image_fallback_class_init (GtkCssImageFallbackClass *klass)
+{
+ GtkCssImageClass *image_class = GTK_CSS_IMAGE_CLASS (klass);
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ image_class->get_width = gtk_css_image_fallback_get_width;
+ image_class->get_height = gtk_css_image_fallback_get_height;
+ image_class->get_aspect_ratio = gtk_css_image_fallback_get_aspect_ratio;
+ image_class->draw = gtk_css_image_fallback_draw;
+ image_class->parse = gtk_css_image_fallback_parse;
+ image_class->compute = gtk_css_image_fallback_compute;
+ image_class->print = gtk_css_image_fallback_print;
+
+ object_class->dispose = gtk_css_image_fallback_dispose;
+}
+
+static void
+_gtk_css_image_fallback_init (GtkCssImageFallback *image_fallback)
+{
+ image_fallback->used = -1;
+}
--- /dev/null
+/*
+ * 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>
+ */
+
+#ifndef __GTK_CSS_IMAGE_FALLBACK_PRIVATE_H__
+#define __GTK_CSS_IMAGE_FALLBACK_PRIVATE_H__
+
+#include "gtk/gtkcssimageprivate.h"
+#include "gtk/gtkcssvalueprivate.h"
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_CSS_IMAGE_FALLBACK (_gtk_css_image_fallback_get_type ())
+#define GTK_CSS_IMAGE_FALLBACK(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_IMAGE_FALLBACK, GtkCssImageFallback))
+#define GTK_CSS_IMAGE_FALLBACK_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_IMAGE_FALLBACK, GtkCssImageFallbackClass))
+#define GTK_IS_CSS_IMAGE_FALLBACK(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_IMAGE_FALLBACK))
+#define GTK_IS_CSS_IMAGE_FALLBACK_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_IMAGE_FALLBACK))
+#define GTK_CSS_IMAGE_FALLBACK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_IMAGE_FALLBACK, GtkCssImageFallbackClass))
+
+typedef struct _GtkCssImageFallback GtkCssImageFallback;
+typedef struct _GtkCssImageFallbackClass GtkCssImageFallbackClass;
+
+struct _GtkCssImageFallback
+{
+ GtkCssImage parent;
+
+ GtkCssImage **images;
+ int n_images;
+
+ int used;
+
+ GtkCssValue *color;
+};
+
+struct _GtkCssImageFallbackClass
+{
+ GtkCssImageClass parent_class;
+};
+
+GType _gtk_css_image_fallback_get_type (void) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* __GTK_CSS_IMAGE_FALLBACK_PRIVATE_H__ */
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