9b4ed66218
This is a reorganization of how value computing should be done. Previously the GtkCssStyleProperty.compute vfunc was supposed to take care of special cases when it needed those for computation. However, this proved to be very complicated in cases where values were nested and only the last value (of a common type) needed to be special cased. A common example for this was the fallback handling for unresolvable colors. Now, we pass the property's ID along with all compute functions so we can do the special casing where it's necessary. Note that no actual changes happen in this commit. This will happen in follow-ups.
111 lines
5.4 KiB
C
111 lines
5.4 KiB
C
/*
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* Copyright © 2011 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#ifndef __GTK_CSS_IMAGE_PRIVATE_H__
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#define __GTK_CSS_IMAGE_PRIVATE_H__
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#include <cairo.h>
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#include <glib-object.h>
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#include "gtk/gtkstylecontext.h"
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#include "gtk/gtkcssparserprivate.h"
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G_BEGIN_DECLS
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#define GTK_TYPE_CSS_IMAGE (_gtk_css_image_get_type ())
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#define GTK_CSS_IMAGE(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_IMAGE, GtkCssImage))
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#define GTK_CSS_IMAGE_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_IMAGE, GtkCssImageClass))
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#define GTK_IS_CSS_IMAGE(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_IMAGE))
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#define GTK_IS_CSS_IMAGE_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_IMAGE))
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#define GTK_CSS_IMAGE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_IMAGE, GtkCssImageClass))
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typedef struct _GtkCssImage GtkCssImage;
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typedef struct _GtkCssImageClass GtkCssImageClass;
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struct _GtkCssImage
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{
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GObject parent;
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};
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struct _GtkCssImageClass
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{
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GObjectClass parent_class;
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/* width of image or 0 if it has no width (optional) */
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int (* get_width) (GtkCssImage *image);
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/* height of image or 0 if it has no height (optional) */
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int (* get_height) (GtkCssImage *image);
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/* aspect ratio (width / height) of image or 0 if it has no aspect ratio (optional) */
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double (* get_aspect_ratio) (GtkCssImage *image);
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/* create "computed value" in CSS terms, returns a new reference */
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GtkCssImage *(* compute) (GtkCssImage *image,
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guint property_id,
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GtkStyleContext *context);
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/* draw to 0,0 with the given width and height */
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void (* draw) (GtkCssImage *image,
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cairo_t *cr,
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double width,
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double height);
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/* parse CSS, return TRUE on success */
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gboolean (* parse) (GtkCssImage *image,
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GtkCssParser *parser);
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/* print to CSS */
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void (* print) (GtkCssImage *image,
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GString *string);
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};
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GType _gtk_css_image_get_type (void) G_GNUC_CONST;
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gboolean _gtk_css_image_can_parse (GtkCssParser *parser);
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GtkCssImage * _gtk_css_image_new_parse (GtkCssParser *parser);
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int _gtk_css_image_get_width (GtkCssImage *image);
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int _gtk_css_image_get_height (GtkCssImage *image);
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double _gtk_css_image_get_aspect_ratio (GtkCssImage *image);
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GtkCssImage * _gtk_css_image_compute (GtkCssImage *image,
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guint property_id,
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GtkStyleContext *context);
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void _gtk_css_image_draw (GtkCssImage *image,
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cairo_t *cr,
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double width,
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double height);
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void _gtk_css_image_print (GtkCssImage *image,
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GString *string);
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void _gtk_css_image_get_concrete_size (GtkCssImage *image,
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double specified_width,
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double specified_height,
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double default_width,
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double default_height,
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double *concrete_width,
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double *concrete_height);
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cairo_surface_t *
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_gtk_css_image_get_surface (GtkCssImage *image,
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cairo_surface_t *target,
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int surface_width,
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int surface_height);
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G_END_DECLS
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#endif /* __GTK_CSS_IMAGE_PRIVATE_H__ */
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