--- /dev/null
+/*
+ * Copyright © 2011 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Benjamin Otte <otte@gnome.org>
+ */
+
+#include "config.h"
+
+#include "gtkcssimagegradientprivate.h"
+
+#include "gtkcssprovider.h"
+
+G_DEFINE_TYPE (GtkCssImageGradient, _gtk_css_image_gradient, GTK_TYPE_CSS_IMAGE)
+
+static GtkCssImage *
+gtk_css_image_gradient_compute (GtkCssImage *image,
+ GtkStyleContext *context)
+{
+ GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
+ GtkCssImageGradient *copy;
+
+ if (gradient->pattern)
+ return g_object_ref (gradient);
+
+ copy = g_object_new (GTK_TYPE_CSS_IMAGE_GRADIENT, NULL);
+ copy->gradient = gtk_gradient_ref (gradient->gradient);
+ copy->pattern = gtk_gradient_resolve_for_context (copy->gradient, context);
+
+ return GTK_CSS_IMAGE (copy);
+}
+
+static void
+gtk_css_image_gradient_draw (GtkCssImage *image,
+ cairo_t *cr,
+ double width,
+ double height)
+{
+ GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
+
+ if (!gradient->pattern)
+ {
+ g_warning ("trying to paint unresolved gradient");
+ return;
+ }
+
+ cairo_scale (cr, width, height);
+
+ cairo_rectangle (cr, 0, 0, 1, 1);
+ cairo_set_source (cr, gradient->pattern);
+ cairo_fill (cr);
+}
+
+static gboolean
+gtk_css_image_gradient_parse (GtkCssImage *image,
+ GtkCssParser *parser,
+ GFile *base)
+{
+ GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
+
+ gradient->gradient = _gtk_gradient_parse (parser);
+
+ return gradient->gradient != NULL;
+}
+
+static void
+gtk_css_image_gradient_print (GtkCssImage *image,
+ GString *string)
+{
+ GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
+ char *s;
+
+ s = gtk_gradient_to_string (gradient->gradient);
+ g_string_append (string, s);
+ g_free (s);
+}
+
+static void
+gtk_css_image_gradient_dispose (GObject *object)
+{
+ GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (object);
+
+ if (gradient->gradient)
+ {
+ gtk_gradient_unref (gradient->gradient);
+ gradient->gradient = NULL;
+ }
+ if (gradient->pattern)
+ {
+ cairo_pattern_destroy (gradient->pattern);
+ gradient->pattern = NULL;
+ }
+
+ G_OBJECT_CLASS (_gtk_css_image_gradient_parent_class)->dispose (object);
+}
+
+static void
+_gtk_css_image_gradient_class_init (GtkCssImageGradientClass *klass)
+{
+ GtkCssImageClass *image_class = GTK_CSS_IMAGE_CLASS (klass);
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ image_class->compute = gtk_css_image_gradient_compute;
+ image_class->draw = gtk_css_image_gradient_draw;
+ image_class->parse = gtk_css_image_gradient_parse;
+ image_class->print = gtk_css_image_gradient_print;
+
+ object_class->dispose = gtk_css_image_gradient_dispose;
+}
+
+static void
+_gtk_css_image_gradient_init (GtkCssImageGradient *image_gradient)
+{
+}
+
+GtkGradient *
+_gtk_gradient_parse (GtkCssParser *parser)
+{
+ GtkGradient *gradient;
+ cairo_pattern_type_t type;
+ gdouble coords[6];
+ guint i;
+
+ g_return_val_if_fail (parser != NULL, NULL);
+
+ if (!_gtk_css_parser_try (parser, "-gtk-gradient", TRUE))
+ {
+ _gtk_css_parser_error (parser,
+ "Expected '-gtk-gradient'");
+ return NULL;
+ }
+
+ if (!_gtk_css_parser_try (parser, "(", TRUE))
+ {
+ _gtk_css_parser_error (parser,
+ "Expected '(' after '-gtk-gradient'");
+ return NULL;
+ }
+
+ /* Parse gradient type */
+ if (_gtk_css_parser_try (parser, "linear", TRUE))
+ type = CAIRO_PATTERN_TYPE_LINEAR;
+ else if (_gtk_css_parser_try (parser, "radial", TRUE))
+ type = CAIRO_PATTERN_TYPE_RADIAL;
+ else
+ {
+ _gtk_css_parser_error (parser,
+ "Gradient type must be 'radial' or 'linear'");
+ return NULL;
+ }
+
+ /* Parse start/stop position parameters */
+ for (i = 0; i < 2; i++)
+ {
+ if (! _gtk_css_parser_try (parser, ",", TRUE))
+ {
+ _gtk_css_parser_error (parser,
+ "Expected ','");
+ return NULL;
+ }
+
+ if (_gtk_css_parser_try (parser, "left", TRUE))
+ coords[i * 3] = 0;
+ else if (_gtk_css_parser_try (parser, "right", TRUE))
+ coords[i * 3] = 1;
+ else if (_gtk_css_parser_try (parser, "center", TRUE))
+ coords[i * 3] = 0.5;
+ else if (!_gtk_css_parser_try_double (parser, &coords[i * 3]))
+ {
+ _gtk_css_parser_error (parser,
+ "Expected a valid X coordinate");
+ return NULL;
+ }
+
+ if (_gtk_css_parser_try (parser, "top", TRUE))
+ coords[i * 3 + 1] = 0;
+ else if (_gtk_css_parser_try (parser, "bottom", TRUE))
+ coords[i * 3 + 1] = 1;
+ else if (_gtk_css_parser_try (parser, "center", TRUE))
+ coords[i * 3 + 1] = 0.5;
+ else if (!_gtk_css_parser_try_double (parser, &coords[i * 3 + 1]))
+ {
+ _gtk_css_parser_error (parser,
+ "Expected a valid Y coordinate");
+ return NULL;
+ }
+
+ if (type == CAIRO_PATTERN_TYPE_RADIAL)
+ {
+ /* Parse radius */
+ if (! _gtk_css_parser_try (parser, ",", TRUE))
+ {
+ _gtk_css_parser_error (parser,
+ "Expected ','");
+ return NULL;
+ }
+
+ if (! _gtk_css_parser_try_double (parser, &coords[(i * 3) + 2]))
+ {
+ _gtk_css_parser_error (parser,
+ "Expected a numer for the radius");
+ return NULL;
+ }
+ }
+ }
+
+ if (type == CAIRO_PATTERN_TYPE_LINEAR)
+ gradient = gtk_gradient_new_linear (coords[0], coords[1], coords[3], coords[4]);
+ else
+ gradient = gtk_gradient_new_radial (coords[0], coords[1], coords[2],
+ coords[3], coords[4], coords[5]);
+
+ while (_gtk_css_parser_try (parser, ",", TRUE))
+ {
+ GtkSymbolicColor *color;
+ gdouble position;
+
+ if (_gtk_css_parser_try (parser, "from", TRUE))
+ {
+ position = 0;
+
+ if (!_gtk_css_parser_try (parser, "(", TRUE))
+ {
+ gtk_gradient_unref (gradient);
+ _gtk_css_parser_error (parser,
+ "Expected '('");
+ return NULL;
+ }
+
+ }
+ else if (_gtk_css_parser_try (parser, "to", TRUE))
+ {
+ position = 1;
+
+ if (!_gtk_css_parser_try (parser, "(", TRUE))
+ {
+ gtk_gradient_unref (gradient);
+ _gtk_css_parser_error (parser,
+ "Expected '('");
+ return NULL;
+ }
+
+ }
+ else if (_gtk_css_parser_try (parser, "color-stop", TRUE))
+ {
+ if (!_gtk_css_parser_try (parser, "(", TRUE))
+ {
+ gtk_gradient_unref (gradient);
+ _gtk_css_parser_error (parser,
+ "Expected '('");
+ return NULL;
+ }
+
+ if (!_gtk_css_parser_try_double (parser, &position))
+ {
+ gtk_gradient_unref (gradient);
+ _gtk_css_parser_error (parser,
+ "Expected a valid number");
+ return NULL;
+ }
+
+ if (!_gtk_css_parser_try (parser, ",", TRUE))
+ {
+ gtk_gradient_unref (gradient);
+ _gtk_css_parser_error (parser,
+ "Expected a comma");
+ return NULL;
+ }
+ }
+ else
+ {
+ gtk_gradient_unref (gradient);
+ _gtk_css_parser_error (parser,
+ "Not a valid color-stop definition");
+ return NULL;
+ }
+
+ color = _gtk_css_parser_read_symbolic_color (parser);
+ if (color == NULL)
+ {
+ gtk_gradient_unref (gradient);
+ return NULL;
+ }
+
+ gtk_gradient_add_color_stop (gradient, position, color);
+ gtk_symbolic_color_unref (color);
+
+ if (!_gtk_css_parser_try (parser, ")", TRUE))
+ {
+ gtk_gradient_unref (gradient);
+ _gtk_css_parser_error (parser,
+ "Expected ')'");
+ return NULL;
+ }
+ }
+
+ if (!_gtk_css_parser_try (parser, ")", TRUE))
+ {
+ gtk_gradient_unref (gradient);
+ _gtk_css_parser_error (parser,
+ "Expected ')'");
+ return NULL;
+ }
+
+ return gradient;
+}
--- /dev/null
+/*
+ * Copyright © 2011 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Benjamin Otte <otte@gnome.org>
+ */
+
+#ifndef __GTK_CSS_IMAGE_GRADIENT_PRIVATE_H__
+#define __GTK_CSS_IMAGE_GRADIENT_PRIVATE_H__
+
+#include "gtk/gtkcssimageprivate.h"
+
+#include <gtk/gtkgradient.h>
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_CSS_IMAGE_GRADIENT (_gtk_css_image_gradient_get_type ())
+#define GTK_CSS_IMAGE_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_IMAGE_GRADIENT, GtkCssImageGradient))
+#define GTK_CSS_IMAGE_GRADIENT_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_IMAGE_GRADIENT, GtkCssImageGradientClass))
+#define GTK_IS_CSS_IMAGE_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_IMAGE_GRADIENT))
+#define GTK_IS_CSS_IMAGE_GRADIENT_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_IMAGE_GRADIENT))
+#define GTK_CSS_IMAGE_GRADIENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_IMAGE_GRADIENT, GtkCssImageGradientClass))
+
+typedef struct _GtkCssImageGradient GtkCssImageGradient;
+typedef struct _GtkCssImageGradientClass GtkCssImageGradientClass;
+
+struct _GtkCssImageGradient
+{
+ GtkCssImage parent;
+
+ GtkGradient *gradient;
+ cairo_pattern_t *pattern; /* the resolved gradient */
+};
+
+struct _GtkCssImageGradientClass
+{
+ GtkCssImageClass parent_class;
+};
+
+GType _gtk_css_image_gradient_get_type (void) G_GNUC_CONST;
+
+/* for lack of a better place to put it */
+GtkGradient * _gtk_gradient_parse (GtkCssParser *parser);
+
+G_END_DECLS
+
+#endif /* __GTK_CSS_IMAGE_GRADIENT_PRIVATE_H__ */
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