/* GTK - The GIMP Toolkit * Copyright (C) 2010 Carlos Garnacho * * 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 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include "config.h" #include #include #include #include #include #include "gtkprivate.h" #include "gtk9slice.h" #include "gtkpango.h" /** * SECTION:gtkthemingengine * @Short_description: Theming renderers * @Title: GtkThemingEngine * @See_also: #GtkStyleContext * * #GtkThemingEngine is the object used for rendering themed content * in GTK+ widgets. Even though GTK+ has a default implementation, * it can be overridden in CSS files by enforcing a #GtkThemingEngine * object to be loaded as a module. * * In order to implement a theming engine, a #GtkThemingEngine subclass * must be created, alongside the CSS file that will reference it, the * theming engine would be created as an .so library, and installed in * $(gtk-modules-dir)/theming-engines/. * * #GtkThemingEngines have limited access to the object they are * rendering, the #GtkThemingEngine API has read-only accessors to the * style information contained in the rendered object's #GtkStyleContext. */ typedef struct GtkThemingEnginePrivate GtkThemingEnginePrivate; enum { SIDE_LEFT = 1, SIDE_BOTTOM = 1 << 1, SIDE_RIGHT = 1 << 2, SIDE_TOP = 1 << 3, SIDE_ALL = 0xF }; enum { PROP_0, PROP_NAME }; struct GtkThemingEnginePrivate { GtkStyleContext *context; gchar *name; }; #define GTK_THEMING_ENGINE_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_THEMING_ENGINE, GtkThemingEnginePrivate)) static void gtk_theming_engine_finalize (GObject *object); static void gtk_theming_engine_impl_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_theming_engine_impl_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gtk_theming_engine_render_check (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height); static void gtk_theming_engine_render_option (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height); static void gtk_theming_engine_render_arrow (GtkThemingEngine *engine, cairo_t *cr, gdouble angle, gdouble x, gdouble y, gdouble size); static void gtk_theming_engine_render_background (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height); static void gtk_theming_engine_render_frame (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height); static void gtk_theming_engine_render_expander (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height); static void gtk_theming_engine_render_focus (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height); static void gtk_theming_engine_render_layout (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, PangoLayout *layout); static void gtk_theming_engine_render_line (GtkThemingEngine *engine, cairo_t *cr, gdouble x0, gdouble y0, gdouble x1, gdouble y1); static void gtk_theming_engine_render_slider (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkOrientation orientation); static void gtk_theming_engine_render_frame_gap (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkPositionType gap_side, gdouble xy0_gap, gdouble xy1_gap); static void gtk_theming_engine_render_extension (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkPositionType gap_side); static void gtk_theming_engine_render_handle (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height); static void gtk_theming_engine_render_activity (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height); static GdkPixbuf * gtk_theming_engine_render_icon_pixbuf (GtkThemingEngine *engine, const GtkIconSource *source, GtkIconSize size); G_DEFINE_TYPE (GtkThemingEngine, gtk_theming_engine, G_TYPE_OBJECT) typedef struct GtkThemingModule GtkThemingModule; typedef struct GtkThemingModuleClass GtkThemingModuleClass; struct GtkThemingModule { GTypeModule parent_instance; GModule *module; gchar *name; void (*init) (GTypeModule *module); void (*exit) (void); GtkThemingEngine * (*create_engine) (void); }; struct GtkThemingModuleClass { GTypeModuleClass parent_class; }; #define GTK_TYPE_THEMING_MODULE (gtk_theming_module_get_type ()) #define GTK_THEMING_MODULE(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GTK_TYPE_THEMING_MODULE, GtkThemingModule)) #define GTK_IS_THEMING_MODULE(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), GTK_TYPE_THEMING_MODULE)) G_DEFINE_TYPE (GtkThemingModule, gtk_theming_module, G_TYPE_TYPE_MODULE); static void gtk_theming_engine_class_init (GtkThemingEngineClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); object_class->finalize = gtk_theming_engine_finalize; object_class->set_property = gtk_theming_engine_impl_set_property; object_class->get_property = gtk_theming_engine_impl_get_property; klass->render_check = gtk_theming_engine_render_check; klass->render_option = gtk_theming_engine_render_option; klass->render_arrow = gtk_theming_engine_render_arrow; klass->render_background = gtk_theming_engine_render_background; klass->render_frame = gtk_theming_engine_render_frame; klass->render_expander = gtk_theming_engine_render_expander; klass->render_focus = gtk_theming_engine_render_focus; klass->render_layout = gtk_theming_engine_render_layout; klass->render_line = gtk_theming_engine_render_line; klass->render_slider = gtk_theming_engine_render_slider; klass->render_frame_gap = gtk_theming_engine_render_frame_gap; klass->render_extension = gtk_theming_engine_render_extension; klass->render_handle = gtk_theming_engine_render_handle; klass->render_activity = gtk_theming_engine_render_activity; klass->render_icon_pixbuf = gtk_theming_engine_render_icon_pixbuf; /** * GtkThemingEngine:name: * * The theming engine name, this name will be used when registering * custom properties, for a theming engine named "Clearlooks" registering * a "glossy" custom property, it could be referenced in the CSS file as * * * -Clearlooks-glossy: true; * * * Since: 3.0 */ g_object_class_install_property (object_class, PROP_NAME, g_param_spec_string ("name", P_("Name"), P_("Theming engine name"), NULL, G_PARAM_CONSTRUCT_ONLY | GTK_PARAM_READWRITE)); g_type_class_add_private (object_class, sizeof (GtkThemingEnginePrivate)); } static void gtk_theming_engine_init (GtkThemingEngine *engine) { engine->priv = GTK_THEMING_ENGINE_GET_PRIVATE (engine); } static void gtk_theming_engine_finalize (GObject *object) { GtkThemingEnginePrivate *priv; priv = GTK_THEMING_ENGINE (object)->priv; g_free (priv->name); G_OBJECT_GET_CLASS (gtk_theming_engine_parent_class)->finalize (object); } static void gtk_theming_engine_impl_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkThemingEnginePrivate *priv; priv = GTK_THEMING_ENGINE (object)->priv; switch (prop_id) { case PROP_NAME: if (priv->name) g_free (priv->name); priv->name = g_value_dup_string (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_theming_engine_impl_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkThemingEnginePrivate *priv; priv = GTK_THEMING_ENGINE (object)->priv; switch (prop_id) { case PROP_NAME: g_value_set_string (value, priv->name); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } void _gtk_theming_engine_set_context (GtkThemingEngine *engine, GtkStyleContext *context) { GtkThemingEnginePrivate *priv; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = engine->priv; priv->context = context; } /** * gtk_theming_engine_register_property: * @name_space: namespace for the property name * @parse_func: parsing function to use, or %NULL * @pspec: the #GParamSpec for the new property * * Registers a property so it can be used in the CSS file format, * on the CSS file the property will look like * "-${@name_space}-${property_name}". being * ${property_name} the given to @pspec. @name_space will usually * be the theme engine name. * * For any type a @parse_func may be provided, being this function * used for turning any property value (between ':' and ';') in * CSS to the #GValue needed. For basic types there is already * builtin parsing support, so %NULL may be provided for these * cases. * * * Engines must ensure property registration happens exactly once, * usually GTK+ deals with theming engines as singletons, so this * should be guaranteed to happen once, but bear this in mind * when creating #GtkThemeEngines yourself. * * * * In order to make use of the custom registered properties in * the CSS file, make sure the engine is loaded first by specifying * the engine property, either in a previous rule or within the same * one. * * * { * engine: someengine; * -SomeEngine-custom-property: 2; * } * * * * Since: 3.0 **/ void gtk_theming_engine_register_property (const gchar *name_space, GtkStylePropertyParser parse_func, GParamSpec *pspec) { gchar *name; g_return_if_fail (name_space != NULL); g_return_if_fail (strchr (name_space, ' ') == NULL); g_return_if_fail (G_IS_PARAM_SPEC (pspec)); /* FIXME: hack hack hack, replacing pspec->name to include namespace */ name = g_strdup_printf ("-%s-%s", name_space, pspec->name); g_free (pspec->name); pspec->name = name; gtk_style_properties_register_property (parse_func, pspec); } /** * gtk_theming_engine_get_property: * @engine: a #GtkThemingEngine * @property: the property name * @state: state to retrieve the value for * @value: (out) (transfer full): return location for the property value, * you must free this memory using g_value_unset() once you are * done with it. * * Gets a property value as retrieved from the style settings that apply * to the currently rendered element. * * Since: 3.0 **/ void gtk_theming_engine_get_property (GtkThemingEngine *engine, const gchar *property, GtkStateFlags state, GValue *value) { GtkThemingEnginePrivate *priv; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); g_return_if_fail (property != NULL); g_return_if_fail (value != NULL); priv = engine->priv; gtk_style_context_get_property (priv->context, property, state, value); } /** * gtk_theming_engine_get_valist: * @engine: a #GtkThemingEngine * @state: state to retrieve values for * @args: va_list of property name/return location pairs, followed by %NULL * * Retrieves several style property values that apply to the currently * rendered element. * * Since: 3.0 **/ void gtk_theming_engine_get_valist (GtkThemingEngine *engine, GtkStateFlags state, va_list args) { GtkThemingEnginePrivate *priv; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); priv = engine->priv; gtk_style_context_get_valist (priv->context, state, args); } /** * gtk_theming_engine_get: * @engine: a #GtkThemingEngine * @state: state to retrieve values for * @...: property name /return value pairs, followed by %NULL * * Retrieves several style property values that apply to the currently * rendered element. * * Since: 3.0 **/ void gtk_theming_engine_get (GtkThemingEngine *engine, GtkStateFlags state, ...) { GtkThemingEnginePrivate *priv; va_list args; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); priv = engine->priv; va_start (args, state); gtk_style_context_get_valist (priv->context, state, args); va_end (args); } /** * gtk_theming_engine_get_style_property: * @engine: a #GtkThemingEngine * @property_name: the name of the widget style property * @value: (out) (transfer full): Return location for the property value, free with * g_value_unset() after use. * * Gets the value for a widget style property. * * Since: 3.0 **/ void gtk_theming_engine_get_style_property (GtkThemingEngine *engine, const gchar *property_name, GValue *value) { GtkThemingEnginePrivate *priv; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); g_return_if_fail (property_name != NULL); priv = engine->priv; gtk_style_context_get_style_property (priv->context, property_name, value); } /** * gtk_theming_engine_get_style_valist: * @engine: a #GtkThemingEngine * @args: va_list of property name/return location pairs, followed by %NULL * * Retrieves several widget style properties from @engine according to the * currently rendered content's style. * * Since: 3.0 **/ void gtk_theming_engine_get_style_valist (GtkThemingEngine *engine, va_list args) { GtkThemingEnginePrivate *priv; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); priv = engine->priv; gtk_style_context_get_style_valist (priv->context, args); } /** * gtk_theming_engine_get_style: * @engine: a #GtkThemingEngine * @...: property name /return value pairs, followed by %NULL * * Retrieves several widget style properties from @engine according * to the currently rendered content's style. * * Since: 3.0 **/ void gtk_theming_engine_get_style (GtkThemingEngine *engine, ...) { GtkThemingEnginePrivate *priv; va_list args; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); priv = engine->priv; va_start (args, engine); gtk_style_context_get_style_valist (priv->context, args); va_end (args); } /** * gtk_theming_engine_lookup_color: * @engine: a #GtkThemingEngine * @color_name: color name to lookup * @color: (out): Return location for the looked up color * * Looks up and resolves a color name in the current style's color map. * * Returns: %TRUE if @color_name was found and resolved, %FALSE otherwise **/ gboolean gtk_theming_engine_lookup_color (GtkThemingEngine *engine, const gchar *color_name, GdkRGBA *color) { GtkThemingEnginePrivate *priv; g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), FALSE); g_return_val_if_fail (color_name != NULL, FALSE); priv = engine->priv; return gtk_style_context_lookup_color (priv->context, color_name, color); } /** * gtk_theming_engine_get_state: * @engine: a #GtkThemingEngine * * returns the state used when rendering. * * Returns: the state flags * * Since: 3.0 **/ GtkStateFlags gtk_theming_engine_get_state (GtkThemingEngine *engine) { GtkThemingEnginePrivate *priv; g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), 0); priv = engine->priv; return gtk_style_context_get_state (priv->context); } /** * gtk_theming_engine_state_is_running: * @engine: a #GtkThemingEngine * @state: a widget state * @progress: (out): return location for the transition progress * * Returns %TRUE if there is a transition animation running for the * current region (see gtk_style_context_push_animatable_region()). * * If @progress is not %NULL, the animation progress will be returned * there, 0.0 means the state is closest to being %FALSE, while 1.0 means * it's closest to being %TRUE. This means transition animations will * run from 0 to 1 when @state is being set to %TRUE and from 1 to 0 when * it's being set to %FALSE. * * Returns: %TRUE if there is a running transition animation for @state. * * Since: 3.0 **/ gboolean gtk_theming_engine_state_is_running (GtkThemingEngine *engine, GtkStateType state, gdouble *progress) { GtkThemingEnginePrivate *priv; g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), FALSE); priv = engine->priv; return gtk_style_context_state_is_running (priv->context, state, progress); } /** * gtk_theming_engine_get_path: * @engine: a #GtkThemingEngine * * Returns the widget path used for style matching. * * Returns: (transfer none): A #GtkWidgetPath * * Since: 3.0 **/ G_CONST_RETURN GtkWidgetPath * gtk_theming_engine_get_path (GtkThemingEngine *engine) { GtkThemingEnginePrivate *priv; g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), NULL); priv = engine->priv; return gtk_style_context_get_path (priv->context); } /** * gtk_theming_engine_has_class: * @engine: a #GtkThemingEngine * @style_class: class name to look up * * Returns %TRUE if the currently rendered contents have * defined the given class name. * * Returns: %TRUE if @engine has @class_name defined * * Since: 3.0 **/ gboolean gtk_theming_engine_has_class (GtkThemingEngine *engine, const gchar *style_class) { GtkThemingEnginePrivate *priv; g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), FALSE); priv = engine->priv; return gtk_style_context_has_class (priv->context, style_class); } /** * gtk_theming_engine_has_region: * @engine: a #GtkThemingEngine * @style_region: a region name * @flags: (out) (allow-none): return location for region flags * * Returns %TRUE if the currently rendered contents have the * region defined. If @flags_return is not %NULL, it is set * to the flags affecting the region. * * Returns: %TRUE if region is defined * * Since: 3.0 **/ gboolean gtk_theming_engine_has_region (GtkThemingEngine *engine, const gchar *style_region, GtkRegionFlags *flags) { GtkThemingEnginePrivate *priv; if (flags) *flags = 0; g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), FALSE); priv = engine->priv; return gtk_style_context_has_region (priv->context, style_region, flags); } /** * gtk_theming_engine_get_direction: * @engine: a #GtkThemingEngine * * Returns the widget direction used for rendering. * * Returns: the widget direction * * Since: 3.0 **/ GtkTextDirection gtk_theming_engine_get_direction (GtkThemingEngine *engine) { GtkThemingEnginePrivate *priv; g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), GTK_TEXT_DIR_LTR); priv = engine->priv; return gtk_style_context_get_direction (priv->context); } /** * gtk_theming_engine_get_junction_sides: * @engine: a #GtkThemingEngine * * Returns the widget direction used for rendering. * * Returns: the widget direction * * Since: 3.0 **/ GtkJunctionSides gtk_theming_engine_get_junction_sides (GtkThemingEngine *engine) { GtkThemingEnginePrivate *priv; g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), 0); priv = engine->priv; return gtk_style_context_get_junction_sides (priv->context); } /** * gtk_theming_engine_get_color: * @engine: a #GtkThemingEngine * @state: state to retrieve the color for * @color: (out): return value for the foreground color * * Gets the foreground color for a given state. * * Since: 3.0 **/ void gtk_theming_engine_get_color (GtkThemingEngine *engine, GtkStateFlags state, GdkRGBA *color) { GtkThemingEnginePrivate *priv; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); priv = engine->priv; gtk_style_context_get_color (priv->context, state, color); } /** * gtk_theming_engine_get_background_color: * @engine: a #GtkThemingEngine * @state: state to retrieve the color for * @color: (out): return value for the background color * * Gets the background color for a given state. * * Since: 3.0 **/ void gtk_theming_engine_get_background_color (GtkThemingEngine *engine, GtkStateFlags state, GdkRGBA *color) { GtkThemingEnginePrivate *priv; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); priv = engine->priv; gtk_style_context_get_background_color (priv->context, state, color); } /** * gtk_theming_engine_get_border_color: * @engine: a #GtkThemingEngine * @state: state to retrieve the color for * @color: (out): return value for the border color * * Gets the border color for a given state. * * Since: 3.0 **/ void gtk_theming_engine_get_border_color (GtkThemingEngine *engine, GtkStateFlags state, GdkRGBA *color) { GtkThemingEnginePrivate *priv; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); priv = engine->priv; gtk_style_context_get_border_color (priv->context, state, color); } /** * gtk_theming_engine_get_border: * @engine: a #GtkthemingEngine * @state: state to retrieve the border for * @border: (out): return value for the border settings * * Gets the border for a given state as a #GtkBorder. * * Since: 3.0 **/ void gtk_theming_engine_get_border (GtkThemingEngine *engine, GtkStateFlags state, GtkBorder *border) { GtkThemingEnginePrivate *priv; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); priv = engine->priv; gtk_style_context_get_border (priv->context, state, border); } /** * gtk_theming_engine_get_padding: * @engine: a #GtkthemingEngine * @state: state to retrieve the padding for * @padding: (out): return value for the padding settings * * Gets the padding for a given state as a #GtkBorder. * * Since: 3.0 **/ void gtk_theming_engine_get_padding (GtkThemingEngine *engine, GtkStateFlags state, GtkBorder *padding) { GtkThemingEnginePrivate *priv; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); priv = engine->priv; gtk_style_context_get_padding (priv->context, state, padding); } /** * gtk_theming_engine_get_margin: * @engine: a #GtkThemingEngine * @state: state to retrieve the border for * @margin: (out): return value for the margin settings * * Gets the margin for a given state as a #GtkBorder. * * Since: 3.0 **/ void gtk_theming_engine_get_margin (GtkThemingEngine *engine, GtkStateFlags state, GtkBorder *margin) { GtkThemingEnginePrivate *priv; g_return_if_fail (GTK_IS_THEMING_ENGINE (engine)); priv = engine->priv; gtk_style_context_get_margin (priv->context, state, margin); } /** * gtk_theming_engine_get_font: * @engine: a #GtkThemingEngine * @state: state to retrieve the font for * * Returns the font description for a given state. * * Returns: the #PangoFontDescription for the given state. This * object is owned by GTK+ and should not be freed. * * Since: 3.0 **/ const PangoFontDescription * gtk_theming_engine_get_font (GtkThemingEngine *engine, GtkStateFlags state) { GtkThemingEnginePrivate *priv; g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), NULL); priv = engine->priv; return gtk_style_context_get_font (priv->context, state); } /* GtkThemingModule */ static gboolean gtk_theming_module_load (GTypeModule *type_module) { GtkThemingModule *theming_module; GModule *module; gchar *name, *module_path; theming_module = GTK_THEMING_MODULE (type_module); name = theming_module->name; module_path = _gtk_find_module (name, "theming-engines"); if (!module_path) return FALSE; module = g_module_open (module_path, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL); g_free (module_path); if (!module) return FALSE; if (!g_module_symbol (module, "theme_init", (gpointer *) &theming_module->init) || !g_module_symbol (module, "theme_exit", (gpointer *) &theming_module->exit) || !g_module_symbol (module, "create_engine", (gpointer *) &theming_module->create_engine)) { g_module_close (module); return FALSE; } theming_module->module = module; theming_module->init (G_TYPE_MODULE (theming_module)); return TRUE; } static void gtk_theming_module_unload (GTypeModule *type_module) { GtkThemingModule *theming_module; theming_module = GTK_THEMING_MODULE (type_module); theming_module->exit (); g_module_close (theming_module->module); theming_module->module = NULL; theming_module->init = NULL; theming_module->exit = NULL; theming_module->create_engine = NULL; } static void gtk_theming_module_class_init (GtkThemingModuleClass *klass) { GTypeModuleClass *module_class = G_TYPE_MODULE_CLASS (klass); module_class->load = gtk_theming_module_load; module_class->unload = gtk_theming_module_unload; } static void gtk_theming_module_init (GtkThemingModule *module) { } /** * gtk_theming_engine_load: * @name: Theme engine name to load * * Loads and initializes a theming engine module from the * standard directories. * * Returns: (transfer none): A theming engine, or %NULL if * the engine @name doesn't exist. **/ GtkThemingEngine * gtk_theming_engine_load (const gchar *name) { static GHashTable *engines = NULL; static GtkThemingEngine *default_engine; GtkThemingEngine *engine = NULL; if (name) { if (!engines) engines = g_hash_table_new (g_str_hash, g_str_equal); engine = g_hash_table_lookup (engines, name); if (!engine) { GtkThemingModule *module; module = g_object_new (GTK_TYPE_THEMING_MODULE, NULL); g_type_module_set_name (G_TYPE_MODULE (module), name); module->name = g_strdup (name); if (module && g_type_module_use (G_TYPE_MODULE (module))) { engine = (module->create_engine) (); if (engine) g_hash_table_insert (engines, module->name, engine); } } } if (!engine) { if (G_UNLIKELY (!default_engine)) default_engine = g_object_new (GTK_TYPE_THEMING_ENGINE, NULL); engine = default_engine; } return engine; } /** * gtk_theming_engine_get_screen: * @engine: a #GtkThemingEngine * * Returns the #GdkScreen to which @engine currently rendering to. * * Returns: a #GdkScreen, or %NULL. **/ GdkScreen * gtk_theming_engine_get_screen (GtkThemingEngine *engine) { GtkThemingEnginePrivate *priv; g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), NULL); priv = engine->priv; return gtk_style_context_get_screen (priv->context); } /* Paint method implementations */ static void gtk_theming_engine_render_check (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GdkRGBA *fg_color, *bg_color, *border_color; GtkStateFlags flags; gint exterior_size, interior_size, thickness, pad; GtkBorderStyle border_style; GtkBorder *border; gint border_width; flags = gtk_theming_engine_get_state (engine); cairo_save (cr); gtk_theming_engine_get (engine, flags, "color", &fg_color, "background-color", &bg_color, "border-color", &border_color, "border-style", &border_style, "border-width", &border, NULL); border_width = MIN (MIN (border->top, border->bottom), MIN (border->left, border->right)); exterior_size = MIN (width, height); if (exterior_size % 2 == 0) /* Ensure odd */ exterior_size -= 1; /* FIXME: thickness */ thickness = 1; pad = thickness + MAX (1, (exterior_size - 2 * thickness) / 9); interior_size = MAX (1, exterior_size - 2 * pad); if (interior_size < 7) { interior_size = 7; pad = MAX (0, (exterior_size - interior_size) / 2); } x -= (1 + exterior_size - (gint) width) / 2; y -= (1 + exterior_size - (gint) height) / 2; if (border_style == GTK_BORDER_STYLE_SOLID) { cairo_set_line_width (cr, border_width); cairo_rectangle (cr, x + 0.5, y + 0.5, exterior_size - 1, exterior_size - 1); gdk_cairo_set_source_rgba (cr, bg_color); cairo_fill_preserve (cr); if (border_color) gdk_cairo_set_source_rgba (cr, border_color); else gdk_cairo_set_source_rgba (cr, fg_color); cairo_stroke (cr); } gdk_cairo_set_source_rgba (cr, fg_color); if (flags & GTK_STATE_FLAG_INCONSISTENT) { int line_thickness = MAX (1, (3 + interior_size * 2) / 7); cairo_rectangle (cr, x + pad, y + pad + (1 + interior_size - line_thickness) / 2, interior_size, line_thickness); cairo_fill (cr); } else { gdouble progress; gboolean running; running = gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress); if ((flags & GTK_STATE_FLAG_ACTIVE) || running) { if (!running) progress = 1; cairo_translate (cr, x + pad, y + pad); cairo_scale (cr, interior_size / 7., interior_size / 7.); cairo_rectangle (cr, 0, 0, 7 * progress, 7); cairo_clip (cr); cairo_move_to (cr, 7.0, 0.0); cairo_line_to (cr, 7.5, 1.0); cairo_curve_to (cr, 5.3, 2.0, 4.3, 4.0, 3.5, 7.0); cairo_curve_to (cr, 3.0, 5.7, 1.3, 4.7, 0.0, 4.7); cairo_line_to (cr, 0.2, 3.5); cairo_curve_to (cr, 1.1, 3.5, 2.3, 4.3, 3.0, 5.0); cairo_curve_to (cr, 1.0, 3.9, 2.4, 4.1, 3.2, 4.9); cairo_curve_to (cr, 3.5, 3.1, 5.2, 2.0, 7.0, 0.0); cairo_fill (cr); } } cairo_restore (cr); gdk_rgba_free (fg_color); gdk_rgba_free (bg_color); gdk_rgba_free (border_color); gtk_border_free (border); } static void gtk_theming_engine_render_option (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStateFlags flags; GdkRGBA *fg_color, *bg_color, *border_color; gint exterior_size, interior_size, pad, thickness, border_width; GtkBorderStyle border_style; GtkBorder *border; gdouble radius; flags = gtk_theming_engine_get_state (engine); radius = MIN (width, height) / 2 - 0.5; cairo_save (cr); gtk_theming_engine_get (engine, flags, "color", &fg_color, "background-color", &bg_color, "border-color", &border_color, "border-style", &border_style, "border-width", &border, NULL); exterior_size = MIN (width, height); border_width = MIN (MIN (border->top, border->bottom), MIN (border->left, border->right)); if (exterior_size % 2 == 0) /* Ensure odd */ exterior_size -= 1; x -= (1 + exterior_size - width) / 2; y -= (1 + exterior_size - height) / 2; if (border_style == GTK_BORDER_STYLE_SOLID) { cairo_set_line_width (cr, border_width); cairo_arc (cr, x + exterior_size / 2., y + exterior_size / 2., (exterior_size - 1) / 2., 0, 2 * G_PI); gdk_cairo_set_source_rgba (cr, bg_color); cairo_fill_preserve (cr); if (border_color) gdk_cairo_set_source_rgba (cr, border_color); else gdk_cairo_set_source_rgba (cr, fg_color); cairo_stroke (cr); } gdk_cairo_set_source_rgba (cr, fg_color); /* FIXME: thickness */ thickness = 1; if (flags & GTK_STATE_FLAG_INCONSISTENT) { gint line_thickness; pad = thickness + MAX (1, (exterior_size - 2 * thickness) / 9); interior_size = MAX (1, exterior_size - 2 * pad); if (interior_size < 7) { interior_size = 7; pad = MAX (0, (exterior_size - interior_size) / 2); } line_thickness = MAX (1, (3 + interior_size * 2) / 7); cairo_rectangle (cr, x + pad, y + pad + (interior_size - line_thickness) / 2., interior_size, line_thickness); cairo_fill (cr); } if (flags & GTK_STATE_FLAG_ACTIVE) { pad = thickness + MAX (1, 2 * (exterior_size - 2 * thickness) / 9); interior_size = MAX (1, exterior_size - 2 * pad); if (interior_size < 5) { interior_size = 7; pad = MAX (0, (exterior_size - interior_size) / 2); } cairo_arc (cr, x + pad + interior_size / 2., y + pad + interior_size / 2., interior_size / 2., 0, 2 * G_PI); cairo_fill (cr); } cairo_restore (cr); gdk_rgba_free (fg_color); gdk_rgba_free (bg_color); gdk_rgba_free (border_color); gtk_border_free (border); } static void add_path_arrow (cairo_t *cr, gdouble angle, gdouble x, gdouble y, gdouble size) { cairo_save (cr); cairo_translate (cr, x + (size / 2), y + (size / 2)); cairo_rotate (cr, angle); cairo_move_to (cr, 0, - (size / 4)); cairo_line_to (cr, - (size / 2), (size / 4)); cairo_line_to (cr, (size / 2), (size / 4)); cairo_close_path (cr); cairo_restore (cr); } static void gtk_theming_engine_render_arrow (GtkThemingEngine *engine, cairo_t *cr, gdouble angle, gdouble x, gdouble y, gdouble size) { GtkStateFlags flags; GdkRGBA *fg_color; cairo_save (cr); flags = gtk_theming_engine_get_state (engine); gtk_theming_engine_get (engine, flags, "color", &fg_color, NULL); if (flags & GTK_STATE_FLAG_INSENSITIVE) { add_path_arrow (cr, angle, x + 1, y + 1, size); cairo_set_source_rgb (cr, 1, 1, 1); cairo_fill (cr); } add_path_arrow (cr, angle, x, y, size); gdk_cairo_set_source_rgba (cr, fg_color); cairo_fill (cr); cairo_restore (cr); gdk_rgba_free (fg_color); } static void add_path_line (cairo_t *cr, gdouble x1, gdouble y1, gdouble x2, gdouble y2) { /* Adjust endpoints */ if (y1 == y2) { y1 += 0.5; y2 += 0.5; x2 += 1; } else if (x1 == x2) { x1 += 0.5; x2 += 0.5; y2 += 1; } cairo_move_to (cr, x1, y1); cairo_line_to (cr, x2, y2); } static void color_shade (const GdkRGBA *color, gdouble factor, GdkRGBA *color_return) { GtkSymbolicColor *literal, *shade; literal = gtk_symbolic_color_new_literal (color); shade = gtk_symbolic_color_new_shade (literal, factor); gtk_symbolic_color_unref (literal); gtk_symbolic_color_resolve (shade, NULL, color_return); gtk_symbolic_color_unref (shade); } static void _cairo_round_rectangle_sides (cairo_t *cr, gdouble radius, gdouble x, gdouble y, gdouble width, gdouble height, guint sides, GtkJunctionSides junction) { radius = CLAMP (radius, 0, MIN (width / 2, height / 2)); if (sides & SIDE_RIGHT) { if (radius == 0 || (junction & GTK_JUNCTION_CORNER_TOPRIGHT)) cairo_move_to (cr, x + width, y); else { cairo_new_sub_path (cr); cairo_arc (cr, x + width - radius, y + radius, radius, - G_PI / 4, 0); } if (radius == 0 || (junction & GTK_JUNCTION_CORNER_BOTTOMRIGHT)) cairo_line_to (cr, x + width, y + height); else cairo_arc (cr, x + width - radius, y + height - radius, radius, 0, G_PI / 4); } if (sides & SIDE_BOTTOM) { if (radius != 0 && ! (junction & GTK_JUNCTION_CORNER_BOTTOMRIGHT)) { if ((sides & SIDE_RIGHT) == 0) cairo_new_sub_path (cr); cairo_arc (cr, x + width - radius, y + height - radius, radius, G_PI / 4, G_PI / 2); } else if ((sides & SIDE_RIGHT) == 0) cairo_move_to (cr, x + width, y + height); if (radius == 0 || (junction & GTK_JUNCTION_CORNER_BOTTOMLEFT)) cairo_line_to (cr, x, y + height); else cairo_arc (cr, x + radius, y + height - radius, radius, G_PI / 2, 3 * (G_PI / 4)); } else cairo_move_to (cr, x, y + height); if (sides & SIDE_LEFT) { if (radius != 0 && ! (junction & GTK_JUNCTION_CORNER_BOTTOMLEFT)) { if ((sides & SIDE_BOTTOM) == 0) cairo_new_sub_path (cr); cairo_arc (cr, x + radius, y + height - radius, radius, 3 * (G_PI / 4), G_PI); } else if ((sides & SIDE_BOTTOM) == 0) cairo_move_to (cr, x, y + height); if (radius == 0 || (junction & GTK_JUNCTION_CORNER_TOPLEFT)) cairo_line_to (cr, x, y); else cairo_arc (cr, x + radius, y + radius, radius, G_PI, G_PI + G_PI / 4); } if (sides & SIDE_TOP) { if (radius != 0 && ! (junction & GTK_JUNCTION_CORNER_TOPLEFT)) { if ((sides & SIDE_LEFT) == 0) cairo_new_sub_path (cr); cairo_arc (cr, x + radius, y + radius, radius, 5 * (G_PI / 4), 3 * (G_PI / 2)); } else if ((sides & SIDE_LEFT) == 0) cairo_move_to (cr, x, y); if (radius == 0 || (junction & GTK_JUNCTION_CORNER_TOPRIGHT)) cairo_line_to (cr, x + width, y); else cairo_arc (cr, x + width - radius, y + radius, radius, 3 * (G_PI / 2), - G_PI / 4); } } static void render_background_internal (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkJunctionSides junction) { GdkRGBA *bg_color; cairo_pattern_t *pattern; GtkStateFlags flags; gboolean running; gdouble progress, alpha = 1; gint radius; flags = gtk_theming_engine_get_state (engine); cairo_save (cr); gtk_theming_engine_get (engine, flags, "background-image", &pattern, "background-color", &bg_color, "border-radius", &radius, NULL); running = gtk_theming_engine_state_is_running (engine, GTK_STATE_PRELIGHT, &progress); _cairo_round_rectangle_sides (cr, (gdouble) radius, x, y, width, height, SIDE_ALL, junction); cairo_clip (cr); if (gtk_theming_engine_has_class (engine, "background")) { cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.0); /* transparent */ cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); cairo_paint (cr); } cairo_translate (cr, x, y); cairo_scale (cr, width, height); if (running) { cairo_pattern_t *other_pattern; GtkStateFlags other_flags; GdkRGBA *other_bg; cairo_pattern_t *new_pattern = NULL; if (flags & GTK_STATE_FLAG_PRELIGHT) { other_flags = flags & ~(GTK_STATE_FLAG_PRELIGHT); progress = 1 - progress; } else other_flags = flags | GTK_STATE_FLAG_PRELIGHT; gtk_theming_engine_get (engine, other_flags, "background-image", &other_pattern, "background-color", &other_bg, NULL); if (pattern && other_pattern) { cairo_pattern_type_t type, other_type; gint n0, n1; cairo_pattern_get_color_stop_count (pattern, &n0); cairo_pattern_get_color_stop_count (other_pattern, &n1); type = cairo_pattern_get_type (pattern); other_type = cairo_pattern_get_type (other_pattern); if (type == other_type && n0 == n1) { gdouble offset0, red0, green0, blue0, alpha0; gdouble offset1, red1, green1, blue1, alpha1; gdouble x00, x01, y00, y01, x10, x11, y10, y11; gdouble r00, r01, r10, r11; guint i; if (type == CAIRO_PATTERN_TYPE_LINEAR) { cairo_pattern_get_linear_points (pattern, &x00, &y00, &x01, &y01); cairo_pattern_get_linear_points (other_pattern, &x10, &y10, &x11, &y11); new_pattern = cairo_pattern_create_linear (x00 + (x10 - x00) * progress, y00 + (y10 - y00) * progress, x01 + (x11 - x01) * progress, y01 + (y11 - y01) * progress); } else { cairo_pattern_get_radial_circles (pattern, &x00, &y00, &r00, &x01, &y01, &r01); cairo_pattern_get_radial_circles (other_pattern, &x10, &y10, &r10, &x11, &y11, &r11); new_pattern = cairo_pattern_create_radial (x00 + (x10 - x00) * progress, y00 + (y10 - y00) * progress, r00 + (r10 - r00) * progress, x01 + (x11 - x01) * progress, y01 + (y11 - y01) * progress, r01 + (r11 - r01) * progress); } cairo_pattern_set_filter (new_pattern, CAIRO_FILTER_FAST); i = 0; /* Blend both gradients into one */ while (i < n0 && i < n1) { cairo_pattern_get_color_stop_rgba (pattern, i, &offset0, &red0, &green0, &blue0, &alpha0); cairo_pattern_get_color_stop_rgba (other_pattern, i, &offset1, &red1, &green1, &blue1, &alpha1); cairo_pattern_add_color_stop_rgba (new_pattern, offset0 + ((offset1 - offset0) * progress), red0 + ((red1 - red0) * progress), green0 + ((green1 - green0) * progress), blue0 + ((blue1 - blue0) * progress), alpha0 + ((alpha1 - alpha0) * progress)); i++; } } else { /* Different pattern types, or different color * stop counts, alpha blend both patterns. */ cairo_rectangle (cr, 0, 0, 1, 1); cairo_set_source (cr, other_pattern); cairo_fill_preserve (cr); /* Set alpha for posterior drawing * of the target pattern */ alpha = 1 - progress; } } else if (pattern || other_pattern) { cairo_pattern_t *p; const GdkRGBA *c; gdouble x0, y0, x1, y1, r0, r1; gint n, i; /* Blend a pattern with a color */ if (pattern) { p = pattern; c = other_bg; progress = 1 - progress; } else { p = other_pattern; c = bg_color; } if (cairo_pattern_get_type (p) == CAIRO_PATTERN_TYPE_LINEAR) { cairo_pattern_get_linear_points (p, &x0, &y0, &x1, &y1); new_pattern = cairo_pattern_create_linear (x0, y0, x1, y1); } else { cairo_pattern_get_radial_circles (p, &x0, &y0, &r0, &x1, &y1, &r1); new_pattern = cairo_pattern_create_radial (x0, y0, r0, x1, y1, r1); } cairo_pattern_get_color_stop_count (p, &n); for (i = 0; i < n; i++) { gdouble red1, green1, blue1, alpha1; gdouble offset; cairo_pattern_get_color_stop_rgba (p, i, &offset, &red1, &green1, &blue1, &alpha1); cairo_pattern_add_color_stop_rgba (new_pattern, offset, c->red + ((red1 - c->red) * progress), c->green + ((green1 - c->green) * progress), c->blue + ((blue1 - c->blue) * progress), c->alpha + ((alpha1 - c->alpha) * progress)); } } else { const GdkRGBA *color, *other_color; /* Merge just colors */ color = bg_color; other_color = other_bg; new_pattern = cairo_pattern_create_rgba (CLAMP (color->red + ((other_color->red - color->red) * progress), 0, 1), CLAMP (color->green + ((other_color->green - color->green) * progress), 0, 1), CLAMP (color->blue + ((other_color->blue - color->blue) * progress), 0, 1), CLAMP (color->alpha + ((other_color->alpha - color->alpha) * progress), 0, 1)); } if (new_pattern) { /* Replace pattern to use */ cairo_pattern_destroy (pattern); pattern = new_pattern; } if (other_pattern) cairo_pattern_destroy (other_pattern); if (other_bg) gdk_rgba_free (other_bg); } cairo_rectangle (cr, 0, 0, 1, 1); if (pattern) { cairo_set_source (cr, pattern); cairo_pattern_destroy (pattern); } else gdk_cairo_set_source_rgba (cr, bg_color); if (alpha == 1) cairo_fill (cr); else { cairo_pattern_t *mask; mask = cairo_pattern_create_rgba (1, 1, 1, alpha); cairo_mask (cr, mask); cairo_pattern_destroy (mask); } cairo_restore (cr); gdk_rgba_free (bg_color); } static void gtk_theming_engine_render_background (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkJunctionSides junction; GtkStateFlags flags; GtkBorder *border; junction = gtk_theming_engine_get_junction_sides (engine); if (gtk_theming_engine_has_class (engine, "spinbutton") && gtk_theming_engine_has_class (engine, "button")) { x += 2; y += 2; width -= 4; height -= 4; } flags = gtk_theming_engine_get_state (engine); gtk_theming_engine_get (engine, flags, "border-width", &border, NULL); x += border->left; y += border->top; width -= border->left + border->right; height -= border->top + border->bottom; render_background_internal (engine, cr, x, y, width, height, junction); gtk_border_free (border); } /* Renders the small triangle on corners so * frames with 0 radius have a 3D-like effect */ static void _cairo_corner_triangle (cairo_t *cr, gdouble x, gdouble y, gint size) { gint i; cairo_move_to (cr, x + 0.5, y + size - 0.5); cairo_line_to (cr, x + size - 0.5, y + size - 0.5); cairo_line_to (cr, x + size - 0.5, y + 0.5); for (i = 1; i < size - 1; i++) { cairo_move_to (cr, x + size - 0.5, y + i + 0.5); cairo_line_to (cr, x + (size - i) - 0.5, y + i + 0.5); } } static void render_frame_internal (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, guint hidden_side, GtkJunctionSides junction) { GtkStateFlags state; GdkRGBA lighter; GdkRGBA *border_color; GtkBorderStyle border_style; gint border_width, radius; gdouble progress, d1, d2, m; gboolean running; GtkBorder *border; state = gtk_theming_engine_get_state (engine); gtk_theming_engine_get (engine, state, "border-color", &border_color, "border-style", &border_style, "border-width", &border, "border-radius", &radius, NULL); running = gtk_theming_engine_state_is_running (engine, GTK_STATE_PRELIGHT, &progress); border_width = MIN (MIN (border->top, border->bottom), MIN (border->left, border->right)); if (running) { GtkStateFlags other_state; GdkRGBA *other_color; if (state & GTK_STATE_FLAG_PRELIGHT) { other_state = state & ~(GTK_STATE_FLAG_PRELIGHT); progress = 1 - progress; } else other_state = state | GTK_STATE_FLAG_PRELIGHT; gtk_theming_engine_get (engine, other_state, "border-color", &other_color, NULL); border_color->red = CLAMP (border_color->red + ((other_color->red - border_color->red) * progress), 0, 1); border_color->green = CLAMP (border_color->green + ((other_color->green - border_color->green) * progress), 0, 1); border_color->blue = CLAMP (border_color->blue + ((other_color->blue - border_color->blue) * progress), 0, 1); border_color->alpha = CLAMP (border_color->alpha + ((other_color->alpha - border_color->alpha) * progress), 0, 1); gdk_rgba_free (other_color); } cairo_save (cr); color_shade (border_color, 1.8, &lighter); switch (border_style) { case GTK_BORDER_STYLE_NONE: break; case GTK_BORDER_STYLE_SOLID: cairo_set_line_width (cr, border_width); cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE); if (border_width > 1) { x += (gdouble) border_width / 2; y += (gdouble) border_width / 2; width -= border_width; height -= border_width; } else if (border_width == 1) { x += 0.5; y += 0.5; width -= 1; height -= 1; } _cairo_round_rectangle_sides (cr, (gdouble) radius, x, y, width, height, SIDE_ALL & ~(hidden_side), junction); gdk_cairo_set_source_rgba (cr, border_color); cairo_stroke (cr); break; case GTK_BORDER_STYLE_INSET: case GTK_BORDER_STYLE_OUTSET: cairo_set_line_width (cr, border_width); if (radius == 0) cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE); else cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT); if (border_width > 1) { d1 = (gdouble) border_width / 2; d2 = border_width; } else { d1 = 0.5; d2 = 1; } cairo_save (cr); m = MIN (width, height); m /= 2; if (border_style == GTK_BORDER_STYLE_INSET) gdk_cairo_set_source_rgba (cr, &lighter); else gdk_cairo_set_source_rgba (cr, border_color); _cairo_round_rectangle_sides (cr, (gdouble) radius, x + d1, y + d1, width - d2, height - d2, (SIDE_BOTTOM | SIDE_RIGHT) & ~(hidden_side), junction); cairo_stroke (cr); if (border_style == GTK_BORDER_STYLE_INSET) gdk_cairo_set_source_rgba (cr, border_color); else gdk_cairo_set_source_rgba (cr, &lighter); _cairo_round_rectangle_sides (cr, (gdouble) radius, x + d1, y + d1, width - d2, height - d2, (SIDE_TOP | SIDE_LEFT) & ~(hidden_side), junction); cairo_stroke (cr); if (border_width > 1) { /* overprint top/right and bottom/left corner * triangles if there are square corners there, * to give the box a 3D-like appearance. */ cairo_save (cr); if (border_style == GTK_BORDER_STYLE_INSET) gdk_cairo_set_source_rgba (cr, &lighter); else gdk_cairo_set_source_rgba (cr, border_color); cairo_set_line_width (cr, 1); if (radius == 0 || (junction & GTK_JUNCTION_CORNER_TOPRIGHT) != 0) _cairo_corner_triangle (cr, x + width - border_width, y, border_width); if (radius == 0 || (junction & GTK_JUNCTION_CORNER_BOTTOMLEFT) != 0) _cairo_corner_triangle (cr, x, y + height - border_width, border_width); cairo_stroke (cr); cairo_restore (cr); } cairo_restore (cr); break; } cairo_restore (cr); if (border_color) gdk_rgba_free (border_color); gtk_border_free (border); } static void gtk_theming_engine_render_frame (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStateFlags flags; Gtk9Slice *slice; GtkBorderStyle border_style; GtkJunctionSides junction; flags = gtk_theming_engine_get_state (engine); junction = gtk_theming_engine_get_junction_sides (engine); gtk_theming_engine_get (engine, flags, "border-image", &slice, "border-style", &border_style, NULL); if (slice) { _gtk_9slice_render (slice, cr, x, y, width, height); _gtk_9slice_unref (slice); } else if (border_style != GTK_BORDER_STYLE_NONE) render_frame_internal (engine, cr, x, y, width, height, 0, junction); } static void gtk_theming_engine_render_expander (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStateFlags flags; GdkRGBA *outline_color, *fg_color; double vertical_overshoot; int diameter; double radius; double interp; /* interpolation factor for center position */ double x_double_horz, y_double_horz; double x_double_vert, y_double_vert; double x_double, y_double; gdouble angle; gint line_width; gboolean running, is_rtl; gdouble progress; cairo_save (cr); flags = gtk_theming_engine_get_state (engine); gtk_theming_engine_get (engine, flags, "color", &fg_color, NULL); gtk_theming_engine_get (engine, flags, "border-color", &outline_color, NULL); running = gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress); is_rtl = (gtk_theming_engine_get_direction (engine) == GTK_TEXT_DIR_RTL); line_width = 1; if (!running) progress = (flags & GTK_STATE_FLAG_ACTIVE) ? 1 : 0; if (is_rtl) angle = (G_PI) - ((G_PI / 2) * progress); else angle = (G_PI / 2) * progress; interp = progress; /* Compute distance that the stroke extends beyonds the end * of the triangle we draw. */ vertical_overshoot = line_width / 2.0 * (1. / tan (G_PI / 8)); /* For odd line widths, we end the vertical line of the triangle * at a half pixel, so we round differently. */ if (line_width % 2 == 1) vertical_overshoot = ceil (0.5 + vertical_overshoot) - 0.5; else vertical_overshoot = ceil (vertical_overshoot); /* Adjust the size of the triangle we draw so that the entire stroke fits */ diameter = (gint) MAX (3, width - 2 * vertical_overshoot); /* If the line width is odd, we want the diameter to be even, * and vice versa, so force the sum to be odd. This relationship * makes the point of the triangle look right. */ diameter -= (1 - (diameter + line_width) % 2); radius = diameter / 2.; /* Adjust the center so that the stroke is properly aligned with * the pixel grid. The center adjustment is different for the * horizontal and vertical orientations. For intermediate positions * we interpolate between the two. */ x_double_vert = floor ((x + width / 2) - (radius + line_width) / 2.) + (radius + line_width) / 2.; y_double_vert = (y + height / 2) - 0.5; x_double_horz = (x + width / 2) - 0.5; y_double_horz = floor ((y + height / 2) - (radius + line_width) / 2.) + (radius + line_width) / 2.; x_double = x_double_vert * (1 - interp) + x_double_horz * interp; y_double = y_double_vert * (1 - interp) + y_double_horz * interp; cairo_translate (cr, x_double, y_double); cairo_rotate (cr, angle); cairo_move_to (cr, - radius / 2., - radius); cairo_line_to (cr, radius / 2., 0); cairo_line_to (cr, - radius / 2., radius); cairo_close_path (cr); cairo_set_line_width (cr, line_width); gdk_cairo_set_source_rgba (cr, fg_color); cairo_fill_preserve (cr); gdk_cairo_set_source_rgba (cr, outline_color); cairo_stroke (cr); cairo_restore (cr); gdk_rgba_free (fg_color); gdk_rgba_free (outline_color); } static void gtk_theming_engine_render_focus (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStateFlags flags; GdkRGBA *color; gint line_width; gint8 *dash_list; cairo_save (cr); flags = gtk_theming_engine_get_state (engine); gtk_theming_engine_get (engine, flags, "color", &color, NULL); gtk_theming_engine_get_style (engine, "focus-line-width", &line_width, "focus-line-pattern", (gchar *) &dash_list, NULL); cairo_set_line_width (cr, (gdouble) line_width); if (dash_list[0]) { gint n_dashes = strlen ((const gchar *) dash_list); gdouble *dashes = g_new (gdouble, n_dashes); gdouble total_length = 0; gdouble dash_offset; gint i; for (i = 0; i < n_dashes; i++) { dashes[i] = dash_list[i]; total_length += dash_list[i]; } /* The dash offset here aligns the pattern to integer pixels * by starting the dash at the right side of the left border * Negative dash offsets in cairo don't work * (https://bugs.freedesktop.org/show_bug.cgi?id=2729) */ dash_offset = - line_width / 2.; while (dash_offset < 0) dash_offset += total_length; cairo_set_dash (cr, dashes, n_dashes, dash_offset); g_free (dashes); } cairo_rectangle (cr, x + line_width / 2., y + line_width / 2., width - line_width, height - line_width); gdk_cairo_set_source_rgba (cr, color); cairo_stroke (cr); cairo_restore (cr); gdk_rgba_free (color); g_free (dash_list); } static void gtk_theming_engine_render_line (GtkThemingEngine *engine, cairo_t *cr, gdouble x0, gdouble y0, gdouble x1, gdouble y1) { GdkRGBA *bg_color, darker, lighter; GtkStateFlags flags; gint i, thickness, thickness_dark, thickness_light, len; cairo_matrix_t matrix; gdouble angle; /* FIXME: thickness */ thickness = 2; thickness_dark = thickness / 2; thickness_light = thickness - thickness_dark; flags = gtk_theming_engine_get_state (engine); cairo_save (cr); gtk_theming_engine_get (engine, flags, "background-color", &bg_color, NULL); color_shade (bg_color, 0.7, &darker); color_shade (bg_color, 1.3, &lighter); cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE); cairo_set_line_width (cr, 1); angle = atan2 (x1 - x0, y1 - y0); angle = (2 * G_PI) - angle; angle += G_PI / 2; cairo_get_matrix (cr, &matrix); cairo_matrix_translate (&matrix, x0, y0); cairo_matrix_rotate (&matrix, angle); cairo_set_matrix (cr, &matrix); x1 -= x0; y1 -= y0; len = (gint) sqrt ((x1 * x1) + (y1 * y1)); y0 = -thickness_dark; for (i = 0; i < thickness_dark; i++) { gdk_cairo_set_source_rgba (cr, &lighter); add_path_line (cr, len - i - 1.5, y0, len - 0.5, y0); cairo_stroke (cr); gdk_cairo_set_source_rgba (cr, &darker); add_path_line (cr, 0.5, y0, len - i - 1.5, y0); cairo_stroke (cr); y0++; } for (i = 0; i < thickness_light; i++) { gdk_cairo_set_source_rgba (cr, &darker); add_path_line (cr, 0.5, y0, thickness_light - i + 0.5, y0); cairo_stroke (cr); gdk_cairo_set_source_rgba (cr, &lighter); add_path_line (cr, thickness_light - i + 0.5, y0, len - 0.5, y0); cairo_stroke (cr); y0++; } cairo_restore (cr); gdk_rgba_free (bg_color); } static void gtk_theming_engine_render_layout (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, PangoLayout *layout) { const PangoMatrix *matrix; GdkRGBA *fg_color; GtkStateFlags flags; GdkScreen *screen; gdouble progress; gboolean running; cairo_save (cr); flags = gtk_theming_engine_get_state (engine); gtk_theming_engine_get (engine, flags, "color", &fg_color, NULL); screen = gtk_theming_engine_get_screen (engine); matrix = pango_context_get_matrix (pango_layout_get_context (layout)); running = gtk_theming_engine_state_is_running (engine, GTK_STATE_PRELIGHT, &progress); if (running) { GtkStateFlags other_flags; GdkRGBA *other_fg; if (flags & GTK_STATE_FLAG_PRELIGHT) { other_flags = flags & ~(GTK_STATE_FLAG_PRELIGHT); progress = 1 - progress; } else other_flags = flags | GTK_STATE_FLAG_PRELIGHT; gtk_theming_engine_get (engine, other_flags, "color", &other_fg, NULL); if (fg_color && other_fg) { fg_color->red = CLAMP (fg_color->red + ((other_fg->red - fg_color->red) * progress), 0, 1); fg_color->green = CLAMP (fg_color->green + ((other_fg->green - fg_color->green) * progress), 0, 1); fg_color->blue = CLAMP (fg_color->blue + ((other_fg->blue - fg_color->blue) * progress), 0, 1); fg_color->alpha = CLAMP (fg_color->alpha + ((other_fg->alpha - fg_color->alpha) * progress), 0, 1); } if (other_fg) gdk_rgba_free (other_fg); } if (matrix) { cairo_matrix_t cairo_matrix; PangoMatrix tmp_matrix; PangoRectangle rect; cairo_matrix_init (&cairo_matrix, matrix->xx, matrix->yx, matrix->xy, matrix->yy, matrix->x0, matrix->y0); pango_layout_get_extents (layout, NULL, &rect); pango_matrix_transform_rectangle (matrix, &rect); pango_extents_to_pixels (&rect, NULL); tmp_matrix = *matrix; cairo_matrix.x0 += x - rect.x; cairo_matrix.y0 += y - rect.y; cairo_set_matrix (cr, &cairo_matrix); } else cairo_move_to (cr, x, y); if (flags & GTK_STATE_FLAG_INSENSITIVE) { cairo_save (cr); cairo_set_source_rgb (cr, 1, 1, 1); cairo_move_to (cr, x + 1, y + 1); _gtk_pango_fill_layout (cr, layout); cairo_restore (cr); } gdk_cairo_set_source_rgba (cr, fg_color); pango_cairo_show_layout (cr, layout); cairo_restore (cr); gdk_rgba_free (fg_color); } static void gtk_theming_engine_render_slider (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkOrientation orientation) { const GtkWidgetPath *path; gint thickness; path = gtk_theming_engine_get_path (engine); gtk_theming_engine_render_background (engine, cr, x, y, width, height); gtk_theming_engine_render_frame (engine, cr, x, y, width, height); /* FIXME: thickness */ thickness = 2; if (gtk_widget_path_is_type (path, GTK_TYPE_SCALE)) { if (orientation == GTK_ORIENTATION_VERTICAL) gtk_theming_engine_render_line (engine, cr, x + thickness, y + (gint) height / 2, x + width - thickness - 1, y + (gint) height / 2); else gtk_theming_engine_render_line (engine, cr, x + (gint) width / 2, y + thickness, x + (gint) width / 2, y + height - thickness - 1); } } static void gtk_theming_engine_render_frame_gap (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkPositionType gap_side, gdouble xy0_gap, gdouble xy1_gap) { GtkJunctionSides junction; GtkStateFlags state; gint border_width, radius; gdouble x0, y0, x1, y1, xc, yc, wc, hc; GtkBorder *border; xc = yc = wc = hc = 0; state = gtk_theming_engine_get_state (engine); junction = gtk_theming_engine_get_junction_sides (engine); gtk_theming_engine_get (engine, state, "border-width", &border, "border-radius", &radius, NULL); border_width = MIN (MIN (border->top, border->bottom), MIN (border->left, border->right)); cairo_save (cr); switch (gap_side) { case GTK_POS_TOP: xc = x + xy0_gap + border_width; yc = y; wc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0); hc = border_width; if (xy0_gap < radius) junction |= GTK_JUNCTION_CORNER_TOPLEFT; if (xy1_gap > width - radius) junction |= GTK_JUNCTION_CORNER_TOPRIGHT; break; case GTK_POS_BOTTOM: xc = x + xy0_gap + border_width; yc = y + height - border_width; wc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0); hc = border_width; if (xy0_gap < radius) junction |= GTK_JUNCTION_CORNER_BOTTOMLEFT; if (xy1_gap > width - radius) junction |= GTK_JUNCTION_CORNER_BOTTOMRIGHT; break; case GTK_POS_LEFT: xc = x; yc = y + xy0_gap + border_width; wc = border_width; hc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0); if (xy0_gap < radius) junction |= GTK_JUNCTION_CORNER_TOPLEFT; if (xy1_gap > height - radius) junction |= GTK_JUNCTION_CORNER_BOTTOMLEFT; break; case GTK_POS_RIGHT: xc = x + width - border_width; yc = y + xy0_gap + border_width; wc = border_width; hc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0); if (xy0_gap < radius) junction |= GTK_JUNCTION_CORNER_TOPRIGHT; if (xy1_gap > height - radius) junction |= GTK_JUNCTION_CORNER_BOTTOMRIGHT; break; } cairo_clip_extents (cr, &x0, &y0, &x1, &y1); cairo_rectangle (cr, x0, y0, x1 - x0, yc - y0); cairo_rectangle (cr, x0, yc, xc - x0, hc); cairo_rectangle (cr, xc + wc, yc, x1 - (xc + wc), hc); cairo_rectangle (cr, x0, yc + hc, x1 - x0, y1 - (yc + hc)); cairo_clip (cr); render_frame_internal (engine, cr, x, y, width, height, 0, junction); cairo_restore (cr); gtk_border_free (border); } static void gtk_theming_engine_render_extension (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkPositionType gap_side) { GtkJunctionSides junction = 0; guint hidden_side = 0; cairo_save (cr); switch (gap_side) { case GTK_POS_LEFT: junction = GTK_JUNCTION_LEFT; hidden_side = SIDE_LEFT; cairo_translate (cr, x + width, y); cairo_rotate (cr, G_PI / 2); break; case GTK_POS_RIGHT: junction = GTK_JUNCTION_RIGHT; hidden_side = SIDE_RIGHT; cairo_translate (cr, x, y + height); cairo_rotate (cr, - G_PI / 2); break; case GTK_POS_TOP: junction = GTK_JUNCTION_TOP; hidden_side = SIDE_TOP; cairo_translate (cr, x + width, y + height); cairo_rotate (cr, G_PI); break; case GTK_POS_BOTTOM: junction = GTK_JUNCTION_BOTTOM; hidden_side = SIDE_BOTTOM; cairo_translate (cr, x, y); break; } if (gap_side == GTK_POS_TOP || gap_side == GTK_POS_BOTTOM) render_background_internal (engine, cr, 0, 0, width, height, GTK_JUNCTION_BOTTOM); else render_background_internal (engine, cr, 0, 0, height, width, GTK_JUNCTION_BOTTOM); cairo_restore (cr); cairo_save (cr); render_frame_internal (engine, cr, x, y, width, height, hidden_side, junction); cairo_restore (cr); } static void render_dot (cairo_t *cr, const GdkRGBA *lighter, const GdkRGBA *darker, gdouble x, gdouble y, gdouble size) { size = CLAMP ((gint) size, 2, 3); if (size == 2) { gdk_cairo_set_source_rgba (cr, lighter); cairo_rectangle (cr, x, y, 1, 1); cairo_rectangle (cr, x + 1, y + 1, 1, 1); cairo_fill (cr); } else if (size == 3) { gdk_cairo_set_source_rgba (cr, lighter); cairo_rectangle (cr, x, y, 2, 1); cairo_rectangle (cr, x, y, 1, 2); cairo_fill (cr); gdk_cairo_set_source_rgba (cr, darker); cairo_rectangle (cr, x + 1, y + 1, 2, 1); cairo_rectangle (cr, x + 2, y, 1, 2); cairo_fill (cr); } } static void gtk_theming_engine_render_handle (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStateFlags flags; GdkRGBA *bg_color; GdkRGBA lighter, darker; gint xx, yy; cairo_save (cr); flags = gtk_theming_engine_get_state (engine); cairo_set_line_width (cr, 1); gtk_theming_engine_get (engine, flags, "background-color", &bg_color, NULL); color_shade (bg_color, 0.7, &darker); color_shade (bg_color, 1.3, &lighter); gdk_cairo_set_source_rgba (cr, bg_color); cairo_rectangle (cr, x, y, width, height); cairo_fill (cr); if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_GRIP)) { GtkJunctionSides sides; gint skip = -1; cairo_save (cr); cairo_set_line_width (cr, 1.0); sides = gtk_theming_engine_get_junction_sides (engine); /* reduce confusing values to a meaningful state */ if ((sides & (GTK_JUNCTION_CORNER_TOPLEFT | GTK_JUNCTION_CORNER_BOTTOMRIGHT)) == (GTK_JUNCTION_CORNER_TOPLEFT | GTK_JUNCTION_CORNER_BOTTOMRIGHT)) sides &= ~GTK_JUNCTION_CORNER_TOPLEFT; if ((sides & (GTK_JUNCTION_CORNER_TOPRIGHT | GTK_JUNCTION_CORNER_BOTTOMLEFT)) == (GTK_JUNCTION_CORNER_TOPRIGHT | GTK_JUNCTION_CORNER_BOTTOMLEFT)) sides &= ~GTK_JUNCTION_CORNER_TOPRIGHT; if (sides == 0) sides = GTK_JUNCTION_CORNER_BOTTOMRIGHT; /* align drawing area to the connected side */ if (sides == GTK_JUNCTION_LEFT) { if (height < width) width = height; } else if (sides == GTK_JUNCTION_CORNER_TOPLEFT) { if (width < height) height = width; else if (height < width) width = height; skip = 2; } else if (sides == GTK_JUNCTION_CORNER_BOTTOMLEFT) { /* make it square, aligning to bottom left */ if (width < height) { y += (height - width); height = width; } else if (height < width) width = height; skip = 1; } else if (sides == GTK_JUNCTION_RIGHT) { /* aligning to right */ if (height < width) { x += (width - height); width = height; } } else if (sides == GTK_JUNCTION_CORNER_TOPRIGHT) { if (width < height) height = width; else if (height < width) { x += (width - height); width = height; } skip = 3; } else if (sides == GTK_JUNCTION_CORNER_BOTTOMRIGHT) { /* make it square, aligning to bottom right */ if (width < height) { y += (height - width); height = width; } else if (height < width) { x += (width - height); width = height; } skip = 0; } else if (sides == GTK_JUNCTION_TOP) { if (width < height) height = width; } else if (sides == GTK_JUNCTION_BOTTOM) { /* align to bottom */ if (width < height) { y += (height - width); height = width; } } else g_assert_not_reached (); if (sides == GTK_JUNCTION_LEFT || sides == GTK_JUNCTION_RIGHT) { gint xi; xi = x; while (xi < x + width) { gdk_cairo_set_source_rgba (cr, &lighter); add_path_line (cr, x, y, x, y + height); cairo_stroke (cr); xi++; gdk_cairo_set_source_rgba (cr, &darker); add_path_line (cr, xi, y, xi, y + height); cairo_stroke (cr); xi += 2; } } else if (sides == GTK_JUNCTION_TOP || sides == GTK_JUNCTION_BOTTOM) { gint yi; yi = y; while (yi < y + height) { gdk_cairo_set_source_rgba (cr, &lighter); add_path_line (cr, x, yi, x + width, yi); cairo_stroke (cr); yi++; gdk_cairo_set_source_rgba (cr, &darker); add_path_line (cr, x, yi, x + width, yi); cairo_stroke (cr); yi+= 2; } } else if (sides == GTK_JUNCTION_CORNER_TOPLEFT) { gint xi, yi; xi = x + width; yi = y + height; while (xi > x + 3) { gdk_cairo_set_source_rgba (cr, &darker); add_path_line (cr, xi, y, x, yi); cairo_stroke (cr); --xi; --yi; add_path_line (cr, xi, y, x, yi); cairo_stroke (cr); --xi; --yi; gdk_cairo_set_source_rgba (cr, &lighter); add_path_line (cr, xi, y, x, yi); cairo_stroke (cr); xi -= 3; yi -= 3; } } else if (sides == GTK_JUNCTION_CORNER_TOPRIGHT) { gint xi, yi; xi = x; yi = y + height; while (xi < (x + width - 3)) { gdk_cairo_set_source_rgba (cr, &lighter); add_path_line (cr, xi, y, x + width, yi); cairo_stroke (cr); ++xi; --yi; gdk_cairo_set_source_rgba (cr, &darker); add_path_line (cr, xi, y, x + width, yi); cairo_stroke (cr); ++xi; --yi; add_path_line (cr, xi, y, x + width, yi); cairo_stroke (cr); xi += 3; yi -= 3; } } else if (sides == GTK_JUNCTION_CORNER_BOTTOMLEFT) { gint xi, yi; xi = x + width; yi = y; while (xi > x + 3) { gdk_cairo_set_source_rgba (cr, &darker); add_path_line (cr, x, yi, xi, y + height); cairo_stroke (cr); --xi; ++yi; add_path_line (cr, x, yi, xi, y + height); cairo_stroke (cr); --xi; ++yi; gdk_cairo_set_source_rgba (cr, &lighter); add_path_line (cr, x, yi, xi, y + height); cairo_stroke (cr); xi -= 3; yi += 3; } } else if (sides == GTK_JUNCTION_CORNER_BOTTOMRIGHT) { gint xi, yi; xi = x; yi = y; while (xi < (x + width - 3)) { gdk_cairo_set_source_rgba (cr, &lighter); add_path_line (cr, xi, y + height, x + width, yi); cairo_stroke (cr); ++xi; ++yi; gdk_cairo_set_source_rgba (cr, &darker); add_path_line (cr, xi, y + height, x + width, yi); cairo_stroke (cr); ++xi; ++yi; add_path_line (cr, xi, y + height, x + width, yi); cairo_stroke (cr); xi += 3; yi += 3; } } cairo_restore (cr); } else if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_PANE_SEPARATOR)) { if (width > height) for (xx = x + width / 2 - 15; xx <= x + width / 2 + 15; xx += 5) render_dot (cr, &lighter, &darker, xx, y + height / 2 - 1, 3); else for (yy = y + height / 2 - 15; yy <= y + height / 2 + 15; yy += 5) render_dot (cr, &lighter, &darker, x + width / 2 - 1, yy, 3); } else { for (yy = y; yy < y + height; yy += 3) for (xx = x; xx < x + width; xx += 6) { render_dot (cr, &lighter, &darker, xx, yy, 2); render_dot (cr, &lighter, &darker, xx + 3, yy + 1, 2); } } cairo_restore (cr); gdk_rgba_free (bg_color); } static void gtk_theming_engine_render_activity (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_SPINNER)) { GtkStateFlags state; guint num_steps, step; GdkRGBA *color; gdouble dx, dy; gdouble progress; gdouble radius; gdouble half; gint i; num_steps = 12; state = gtk_theming_engine_get_state (engine); gtk_theming_engine_get (engine, state, "color", &color, NULL); if (gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress)) step = (guint) (progress * num_steps); else step = 0; cairo_save (cr); cairo_translate (cr, x, y); /* draw clip region */ cairo_set_operator (cr, CAIRO_OPERATOR_OVER); dx = width / 2; dy = height / 2; radius = MIN (width / 2, height / 2); half = num_steps / 2; for (i = 0; i < num_steps; i++) { gint inset = 0.7 * radius; /* transparency is a function of time and intial value */ gdouble t = (gdouble) ((i + num_steps - step) % num_steps) / num_steps; cairo_save (cr); cairo_set_source_rgba (cr, color->red, color->green, color->blue, color->alpha * t); cairo_set_line_width (cr, 2.0); cairo_move_to (cr, dx + (radius - inset) * cos (i * G_PI / half), dy + (radius - inset) * sin (i * G_PI / half)); cairo_line_to (cr, dx + radius * cos (i * G_PI / half), dy + radius * sin (i * G_PI / half)); cairo_stroke (cr); cairo_restore (cr); } cairo_restore (cr); gdk_rgba_free (color); } else { gtk_theming_engine_render_background (engine, cr, x, y, width, height); gtk_theming_engine_render_frame (engine, cr, x, y, width, height); } } static GdkPixbuf * scale_or_ref (GdkPixbuf *src, gint width, gint height) { if (width == gdk_pixbuf_get_width (src) && height == gdk_pixbuf_get_height (src)) return g_object_ref (src); else return gdk_pixbuf_scale_simple (src, width, height, GDK_INTERP_BILINEAR); } static gboolean lookup_icon_size (GtkThemingEngine *engine, GtkIconSize size, gint *width, gint *height) { GdkScreen *screen; GtkSettings *settings; screen = gtk_theming_engine_get_screen (engine); settings = gtk_settings_get_for_screen (screen); return gtk_icon_size_lookup_for_settings (settings, size, width, height); } static GdkPixbuf * gtk_theming_engine_render_icon_pixbuf (GtkThemingEngine *engine, const GtkIconSource *source, GtkIconSize size) { GdkPixbuf *scaled; GdkPixbuf *stated; GdkPixbuf *base_pixbuf; GtkStateFlags state; gint width = 1; gint height = 1; base_pixbuf = gtk_icon_source_get_pixbuf (source); state = gtk_theming_engine_get_state (engine); g_return_val_if_fail (base_pixbuf != NULL, NULL); if (size != (GtkIconSize) -1 && !lookup_icon_size (engine, size, &width, &height)) { g_warning (G_STRLOC ": invalid icon size '%d'", size); return NULL; } /* If the size was wildcarded, and we're allowed to scale, then scale; otherwise, * leave it alone. */ if (size != (GtkIconSize) -1 && gtk_icon_source_get_size_wildcarded (source)) scaled = scale_or_ref (base_pixbuf, width, height); else scaled = g_object_ref (base_pixbuf); /* If the state was wildcarded, then generate a state. */ if (gtk_icon_source_get_state_wildcarded (source)) { if (state & GTK_STATE_FLAG_INSENSITIVE) { stated = gdk_pixbuf_copy (scaled); gdk_pixbuf_saturate_and_pixelate (scaled, stated, 0.8, TRUE); g_object_unref (scaled); } else if (state & GTK_STATE_FLAG_PRELIGHT) { stated = gdk_pixbuf_copy (scaled); gdk_pixbuf_saturate_and_pixelate (scaled, stated, 1.2, FALSE); g_object_unref (scaled); } else stated = scaled; } else stated = scaled; return stated; }