/* 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, see . */ #include "config.h" #include #include #include #include #include #include "gtkprivate.h" #include "gtkmodulesprivate.h" #include "gtkborderimageprivate.h" #include "gtkpango.h" #include "gtkcssarrayvalueprivate.h" #include "gtkcsscornervalueprivate.h" #include "gtkcssenumvalueprivate.h" #include "gtkcssnumbervalueprivate.h" #include "gtkcssrgbavalueprivate.h" #include "gtkcssshadowsvalueprivate.h" #include "gtkcsstypesprivate.h" #include "gtkhslaprivate.h" #include "gtkthemingengineprivate.h" #include "gtkroundedboxprivate.h" #include "gtkthemingbackgroundprivate.h" #include "fallback-c89.c" /** * 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. */ 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); static void gtk_theming_engine_render_icon (GtkThemingEngine *engine, cairo_t *cr, GdkPixbuf *pixbuf, gdouble x, gdouble y); 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)) GType gtk_theming_module_get_type (void); 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_icon = gtk_theming_engine_render_icon; 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; } GtkStyleContext * _gtk_theming_engine_get_context (GtkThemingEngine *engine) { g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), NULL); return engine->priv->context; } GtkCssValue * _gtk_theming_engine_peek_property (GtkThemingEngine *engine, guint property_id) { g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), NULL); return _gtk_style_context_peek_property (engine->priv->context, property_id); } /** * 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: 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 * * Deprecated: 3.6: Always returns %FALSE **/ gboolean gtk_theming_engine_state_is_running (GtkThemingEngine *engine, GtkStateType state, gdouble *progress) { g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), FALSE); return FALSE; } /** * gtk_theming_engine_get_path: * @engine: a #GtkThemingEngine * * Returns the widget path used for style matching. * * Returns: (transfer none): A #GtkWidgetPath * * Since: 3.0 **/ const 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: (transfer none): 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); } } } else { 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: (transfer none): 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; GtkStateFlags flags; gint exterior_size, interior_size, thickness, pad; GtkBorderStyle border_style; GtkBorder border; gint border_width; GtkThemingBackground bg; _gtk_theming_background_init (&bg, engine, x, y, width, height, gtk_theming_engine_get_junction_sides (engine)); if (_gtk_theming_background_has_background_image (&bg)) { _gtk_theming_background_render (&bg, cr); return; } flags = gtk_theming_engine_get_state (engine); cairo_save (cr); gtk_theming_engine_get_color (engine, flags, &fg_color); gtk_theming_engine_get_background_color (engine, flags, &bg_color); gtk_theming_engine_get_border (engine, flags, &border); border_style = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_STYLE)); 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) { GdkRGBA border_color; cairo_set_line_width (cr, border_width); gtk_theming_engine_get_border_color (engine, flags, &border_color); 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); gdk_cairo_set_source_rgba (cr, &border_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 { if (flags & GTK_STATE_FLAG_ACTIVE) { cairo_translate (cr, x + pad, y + pad); cairo_scale (cr, interior_size / 7., interior_size / 7.); cairo_rectangle (cr, 0, 0, 7, 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); } 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; gint exterior_size, interior_size, pad, thickness, border_width; GtkBorderStyle border_style; GtkBorder border; GtkThemingBackground bg; _gtk_theming_background_init (&bg, engine, x, y, width, height, gtk_theming_engine_get_junction_sides (engine)); if (_gtk_theming_background_has_background_image (&bg)) { _gtk_theming_background_render (&bg, cr); return; } flags = gtk_theming_engine_get_state (engine); cairo_save (cr); gtk_theming_engine_get_color (engine, flags, &fg_color); gtk_theming_engine_get_background_color (engine, flags, &bg_color); gtk_theming_engine_get_border (engine, flags, &border); border_style = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_STYLE)); 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) { GdkRGBA border_color; cairo_set_line_width (cr, border_width); gtk_theming_engine_get_border_color (engine, flags, &border_color); cairo_new_sub_path (cr); 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); gdk_cairo_set_source_rgba (cr, &border_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_new_sub_path (cr); 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); } 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_color (engine, flags, &fg_color); 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); } 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) { GtkHSLA hsla; _gtk_hsla_init_from_rgba (&hsla, color); _gtk_hsla_shade (&hsla, &hsla, factor); _gdk_rgba_init_from_hsla (color_return, &hsla); } static void gtk_theming_engine_render_background (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkThemingBackground bg; _gtk_theming_background_init (&bg, engine, x, y, width, height, gtk_theming_engine_get_junction_sides (engine)); _gtk_theming_background_render (&bg, cr); } static void gtk_theming_engine_hide_border_sides (double border[4], GtkBorderStyle border_style[4], guint hidden_side) { guint i; for (i = 0; i < 4; i++) { if (hidden_side & (1 << i) || border_style[i] == GTK_BORDER_STYLE_NONE || border_style[i] == GTK_BORDER_STYLE_HIDDEN) border[i] = 0; } } static void render_frame_fill (cairo_t *cr, GtkRoundedBox *border_box, const double border_width[4], GdkRGBA colors[4], guint hidden_side) { GtkRoundedBox padding_box; guint i, j; padding_box = *border_box; _gtk_rounded_box_shrink (&padding_box, border_width[GTK_CSS_TOP], border_width[GTK_CSS_RIGHT], border_width[GTK_CSS_BOTTOM], border_width[GTK_CSS_LEFT]); if (hidden_side == 0 && gdk_rgba_equal (&colors[0], &colors[1]) && gdk_rgba_equal (&colors[0], &colors[2]) && gdk_rgba_equal (&colors[0], &colors[3])) { gdk_cairo_set_source_rgba (cr, &colors[0]); _gtk_rounded_box_path (border_box, cr); _gtk_rounded_box_path (&padding_box, cr); cairo_fill (cr); } else { for (i = 0; i < 4; i++) { if (hidden_side & (1 << i)) continue; for (j = 0; j < 4; j++) { if (hidden_side & (1 << j)) continue; if (i == j || (gdk_rgba_equal (&colors[i], &colors[j]))) { /* We were already painted when i == j */ if (i > j) break; if (j == 0) _gtk_rounded_box_path_top (border_box, &padding_box, cr); else if (j == 1) _gtk_rounded_box_path_right (border_box, &padding_box, cr); else if (j == 2) _gtk_rounded_box_path_bottom (border_box, &padding_box, cr); else if (j == 3) _gtk_rounded_box_path_left (border_box, &padding_box, cr); } } /* We were already painted when i == j */ if (i > j) continue; gdk_cairo_set_source_rgba (cr, &colors[i]); cairo_fill (cr); } } } static void set_stroke_style (cairo_t *cr, double line_width, GtkBorderStyle style, double length) { double segments[2]; double n; cairo_set_line_width (cr, line_width); if (style == GTK_BORDER_STYLE_DOTTED) { n = round (0.5 * length / line_width); segments[0] = 0; segments[1] = n ? length / n : 2; cairo_set_dash (cr, segments, G_N_ELEMENTS (segments), 0); cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND); cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND); } else { n = length / line_width; /* Optimize the common case of an integer-sized rectangle * Again, we care about focus rectangles. */ if (n == nearbyint (n)) { segments[0] = 1; segments[1] = 2; } else { n = round ((1. / 3) * n); segments[0] = n ? (1. / 3) * length / n : 1; segments[1] = 2 * segments[1]; } cairo_set_dash (cr, segments, G_N_ELEMENTS (segments), 0); cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE); cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER); } } static void render_frame_stroke (cairo_t *cr, GtkRoundedBox *border_box, const double border_width[4], GdkRGBA colors[4], guint hidden_side, GtkBorderStyle stroke_style) { gboolean different_colors, different_borders; GtkRoundedBox stroke_box; guint i; different_colors = !gdk_rgba_equal (&colors[0], &colors[1]) || !gdk_rgba_equal (&colors[0], &colors[2]) || !gdk_rgba_equal (&colors[0], &colors[3]); different_borders = border_width[0] != border_width[1] || border_width[0] != border_width[2] || border_width[0] != border_width[3] ; stroke_box = *border_box; _gtk_rounded_box_shrink (&stroke_box, border_width[GTK_CSS_TOP] / 2.0, border_width[GTK_CSS_RIGHT] / 2.0, border_width[GTK_CSS_BOTTOM] / 2.0, border_width[GTK_CSS_LEFT] / 2.0); if (!different_colors && !different_borders && hidden_side == 0) { double length = 0; /* FAST PATH: * Mostly expected to trigger for focus rectangles */ for (i = 0; i < 4; i++) { length += _gtk_rounded_box_guess_length (&stroke_box, i); _gtk_rounded_box_path_side (&stroke_box, cr, i); } gdk_cairo_set_source_rgba (cr, &colors[0]); set_stroke_style (cr, border_width[0], stroke_style, length); cairo_stroke (cr); } else { GtkRoundedBox padding_box; padding_box = *border_box; _gtk_rounded_box_path (&padding_box, cr); _gtk_rounded_box_shrink (&padding_box, border_width[GTK_CSS_TOP], border_width[GTK_CSS_RIGHT], border_width[GTK_CSS_BOTTOM], border_width[GTK_CSS_LEFT]); for (i = 0; i < 4; i++) { if (hidden_side & (1 << i)) continue; cairo_save (cr); if (i == 0) _gtk_rounded_box_path_top (border_box, &padding_box, cr); else if (i == 1) _gtk_rounded_box_path_right (border_box, &padding_box, cr); else if (i == 2) _gtk_rounded_box_path_bottom (border_box, &padding_box, cr); else if (i == 3) _gtk_rounded_box_path_left (border_box, &padding_box, cr); cairo_clip (cr); _gtk_rounded_box_path_side (&stroke_box, cr, i); gdk_cairo_set_source_rgba (cr, &colors[i]); set_stroke_style (cr, border_width[i], stroke_style, _gtk_rounded_box_guess_length (&stroke_box, i)); cairo_stroke (cr); cairo_restore (cr); } } } static void render_border (cairo_t *cr, GtkRoundedBox *border_box, const double border_width[4], guint hidden_side, GdkRGBA colors[4], GtkBorderStyle border_style[4]) { guint i, j; cairo_save (cr); cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD); for (i = 0; i < 4; i++) { if (hidden_side & (1 << i)) continue; switch (border_style[i]) { case GTK_BORDER_STYLE_NONE: case GTK_BORDER_STYLE_HIDDEN: case GTK_BORDER_STYLE_SOLID: break; case GTK_BORDER_STYLE_INSET: if (i == 1 || i == 2) color_shade (&colors[i], 1.8, &colors[i]); break; case GTK_BORDER_STYLE_OUTSET: if (i == 0 || i == 3) color_shade (&colors[i], 1.8, &colors[i]); break; case GTK_BORDER_STYLE_DOTTED: case GTK_BORDER_STYLE_DASHED: { guint dont_draw = hidden_side; for (j = 0; j < 4; j++) { if (border_style[j] == border_style[i]) hidden_side |= (1 << j); else dont_draw |= (1 << j); } render_frame_stroke (cr, border_box, border_width, colors, dont_draw, border_style[i]); } break; case GTK_BORDER_STYLE_DOUBLE: { GtkRoundedBox other_box; double other_border[4]; guint dont_draw = hidden_side; for (j = 0; j < 4; j++) { if (border_style[j] == GTK_BORDER_STYLE_DOUBLE) hidden_side |= (1 << j); else dont_draw |= (1 << j); other_border[i] = border_width[i] / 3; } render_frame_fill (cr, border_box, other_border, colors, dont_draw); other_box = *border_box; _gtk_rounded_box_shrink (&other_box, 2 * other_border[GTK_CSS_TOP], 2 * other_border[GTK_CSS_RIGHT], 2 * other_border[GTK_CSS_BOTTOM], 2 * other_border[GTK_CSS_LEFT]); render_frame_fill (cr, &other_box, other_border, colors, dont_draw); } break; case GTK_BORDER_STYLE_GROOVE: case GTK_BORDER_STYLE_RIDGE: { GtkRoundedBox other_box; GdkRGBA other_colors[4]; guint dont_draw = hidden_side; double other_border[4]; for (j = 0; j < 4; j++) { other_colors[j] = colors[j]; if ((j == 0 || j == 3) ^ (border_style[j] == GTK_BORDER_STYLE_RIDGE)) color_shade (&other_colors[j], 1.8, &other_colors[j]); else color_shade (&colors[j], 1.8, &colors[j]); if (border_style[j] == GTK_BORDER_STYLE_GROOVE || border_style[j] == GTK_BORDER_STYLE_RIDGE) hidden_side |= (1 << j); else dont_draw |= (1 << j); other_border[i] = border_width[i] / 2; } render_frame_fill (cr, border_box, other_border, colors, dont_draw); other_box = *border_box; _gtk_rounded_box_shrink (&other_box, other_border[GTK_CSS_TOP], other_border[GTK_CSS_RIGHT], other_border[GTK_CSS_BOTTOM], other_border[GTK_CSS_LEFT]); render_frame_fill (cr, &other_box, other_border, other_colors, dont_draw); } break; default: g_assert_not_reached (); break; } } render_frame_fill (cr, border_box, border_width, colors, hidden_side); cairo_restore (cr); } static void render_frame_internal (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, guint hidden_side, GtkJunctionSides junction) { GtkBorderImage border_image; GtkBorderStyle border_style[4]; GtkRoundedBox border_box; double border_width[4]; GdkRGBA colors[4]; border_width[0] = _gtk_css_number_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_WIDTH), 100); border_width[1] = _gtk_css_number_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_RIGHT_WIDTH), 100); border_width[2] = _gtk_css_number_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_BOTTOM_WIDTH), 100); border_width[3] = _gtk_css_number_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_LEFT_WIDTH), 100); border_style[0] = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_STYLE)); border_style[1] = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_RIGHT_STYLE)); border_style[2] = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_BOTTOM_STYLE)); border_style[3] = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_LEFT_STYLE)); gtk_theming_engine_hide_border_sides (border_width, border_style, hidden_side); if (_gtk_border_image_init (&border_image, engine)) _gtk_border_image_render (&border_image, border_width, cr, x, y, width, height); else { colors[0] = *_gtk_css_rgba_value_get_rgba (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_COLOR)); colors[1] = *_gtk_css_rgba_value_get_rgba (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_RIGHT_COLOR)); colors[2] = *_gtk_css_rgba_value_get_rgba (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_BOTTOM_COLOR)); colors[3] = *_gtk_css_rgba_value_get_rgba (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_LEFT_COLOR)); _gtk_rounded_box_init_rect (&border_box, x, y, width, height); _gtk_rounded_box_apply_border_radius_for_engine (&border_box, engine, junction); render_border (cr, &border_box, border_width, hidden_side, colors, border_style); } border_style[0] = _gtk_css_border_style_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_OUTLINE_STYLE)); if (border_style[0] != GTK_BORDER_STYLE_NONE) { int offset; border_style[1] = border_style[2] = border_style[3] = border_style[0]; border_width[0] = _gtk_css_number_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_OUTLINE_WIDTH), 100); border_width[3] = border_width[2] = border_width[1] = border_width[0]; colors[0] = *_gtk_css_rgba_value_get_rgba (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_OUTLINE_COLOR)); colors[3] = colors[2] = colors[1] = colors[0]; offset = _gtk_css_number_value_get (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_OUTLINE_OFFSET), 100); /* reinit box here - outlines don't have a border radius */ _gtk_rounded_box_init_rect (&border_box, x, y, width, height); _gtk_rounded_box_shrink (&border_box, - border_width[GTK_CSS_TOP] - offset, - border_width[GTK_CSS_RIGHT] - offset, - border_width[GTK_CSS_LEFT] - offset, - border_width[GTK_CSS_BOTTOM] - offset); render_border (cr, &border_box, border_width, hidden_side, colors, border_style); } } static void gtk_theming_engine_render_frame (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkJunctionSides junction; junction = gtk_theming_engine_get_junction_sides (engine); 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 is_rtl; gdouble progress; cairo_save (cr); flags = gtk_theming_engine_get_state (engine); gtk_theming_engine_get_color (engine, flags, &fg_color); gtk_theming_engine_get_border_color (engine, flags, &outline_color); is_rtl = (gtk_theming_engine_get_direction (engine) == GTK_TEXT_DIR_RTL); line_width = 1; progress = (flags & GTK_STATE_FLAG_ACTIVE) ? 1 : 0; if (!gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_HORIZONTAL)) { if (is_rtl) angle = (G_PI) - ((G_PI / 2) * progress); else angle = (G_PI / 2) * progress; } else { if (is_rtl) angle = (G_PI / 2) + ((G_PI / 2) * progress); else angle = (G_PI / 2) - ((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); } 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_color (engine, flags, &color); 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); 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 color; GtkStateFlags flags; flags = gtk_theming_engine_get_state (engine); cairo_save (cr); gtk_theming_engine_get_color (engine, flags, &color); cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE); cairo_set_line_width (cr, 1); cairo_move_to (cr, x0 + 0.5, y0 + 0.5); cairo_line_to (cr, x1 + 0.5, y1 + 0.5); gdk_cairo_set_source_rgba (cr, &color); cairo_stroke (cr); cairo_restore (cr); } static void prepare_context_for_layout (cairo_t *cr, gdouble x, gdouble y, PangoLayout *layout) { const PangoMatrix *matrix; matrix = pango_context_get_matrix (pango_layout_get_context (layout)); cairo_move_to (cr, x, y); if (matrix) { cairo_matrix_t cairo_matrix; cairo_matrix_init (&cairo_matrix, matrix->xx, matrix->yx, matrix->xy, matrix->yy, matrix->x0, matrix->y0); cairo_transform (cr, &cairo_matrix); } } static void gtk_theming_engine_render_layout (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, PangoLayout *layout) { GdkRGBA fg_color; GtkStateFlags flags; cairo_save (cr); flags = gtk_theming_engine_get_state (engine); gtk_theming_engine_get_color (engine, flags, &fg_color); prepare_context_for_layout (cr, x, y, layout); _gtk_css_shadows_value_paint_layout (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_TEXT_SHADOW), cr, layout); gdk_cairo_set_source_rgba (cr, &fg_color); pango_cairo_show_layout (cr, layout); cairo_restore (cr); } static void gtk_theming_engine_render_slider (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkOrientation orientation) { gtk_theming_engine_render_background (engine, cr, x, y, width, height); gtk_theming_engine_render_frame (engine, cr, x, y, width, height); } 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; GtkCssValue *corner[4]; 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_border (engine, state, &border); corner[GTK_CSS_TOP_LEFT] = _gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_LEFT_RADIUS); corner[GTK_CSS_TOP_RIGHT] = _gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_TOP_RIGHT_RADIUS); corner[GTK_CSS_BOTTOM_LEFT] = _gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_BOTTOM_LEFT_RADIUS); corner[GTK_CSS_BOTTOM_RIGHT] = _gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_BORDER_BOTTOM_RIGHT_RADIUS); 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 < _gtk_css_corner_value_get_x (corner[GTK_CSS_TOP_LEFT], width)) junction |= GTK_JUNCTION_CORNER_TOPLEFT; if (xy1_gap > width - _gtk_css_corner_value_get_x (corner[GTK_CSS_TOP_RIGHT], width)) 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 < _gtk_css_corner_value_get_x (corner[GTK_CSS_BOTTOM_LEFT], width)) junction |= GTK_JUNCTION_CORNER_BOTTOMLEFT; if (xy1_gap > width - _gtk_css_corner_value_get_x (corner[GTK_CSS_BOTTOM_RIGHT], width)) 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 < _gtk_css_corner_value_get_y (corner[GTK_CSS_TOP_LEFT], height)) junction |= GTK_JUNCTION_CORNER_TOPLEFT; if (xy1_gap > height - _gtk_css_corner_value_get_y (corner[GTK_CSS_BOTTOM_LEFT], height)) 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 < _gtk_css_corner_value_get_y (corner[GTK_CSS_TOP_RIGHT], height)) junction |= GTK_JUNCTION_CORNER_TOPRIGHT; if (xy1_gap > height - _gtk_css_corner_value_get_y (corner[GTK_CSS_BOTTOM_RIGHT], height)) 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); } static void gtk_theming_engine_render_extension (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkPositionType gap_side) { GtkThemingBackground bg; GtkJunctionSides junction = 0; guint hidden_side = 0; switch (gap_side) { case GTK_POS_LEFT: junction = GTK_JUNCTION_LEFT; hidden_side = (1 << GTK_CSS_LEFT); break; case GTK_POS_RIGHT: junction = GTK_JUNCTION_RIGHT; hidden_side = (1 << GTK_CSS_RIGHT); break; case GTK_POS_TOP: junction = GTK_JUNCTION_TOP; hidden_side = (1 << GTK_CSS_TOP); break; case GTK_POS_BOTTOM: junction = GTK_JUNCTION_BOTTOM; hidden_side = (1 << GTK_CSS_BOTTOM); break; } _gtk_theming_background_init (&bg, engine, x, y, width, height, junction); _gtk_theming_background_render (&bg, cr); render_frame_internal (engine, cr, x, y, width, height, hidden_side, junction); } 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, lighter, darker; GtkJunctionSides sides; GtkThemingBackground bg; gint xx, yy; gboolean has_image; cairo_save (cr); flags = gtk_theming_engine_get_state (engine); cairo_set_line_width (cr, 1.0); sides = gtk_theming_engine_get_junction_sides (engine); gtk_theming_engine_get_background_color (engine, flags, &bg_color); color_shade (&bg_color, 0.7, &darker); color_shade (&bg_color, 1.3, &lighter); _gtk_theming_background_init (&bg, engine, x, y, width, height, sides); has_image = _gtk_theming_background_has_background_image (&bg); _gtk_theming_background_render (&bg, cr); gtk_theming_engine_render_frame (engine, cr, x, y, width, height); if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_GRIP)) { /* 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; } 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; } 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; } } 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; } } 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; } } } else if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_PANE_SEPARATOR)) { if (!has_image) { 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); } void _gtk_theming_engine_paint_spinner (cairo_t *cr, gdouble radius, gdouble progress, const GdkRGBA *color) { guint num_steps, step; gdouble half; gint i; num_steps = 12; if (progress >= 0) step = (guint) (progress * num_steps); else step = 0; cairo_save (cr); cairo_set_operator (cr, CAIRO_OPERATOR_OVER); cairo_set_line_width (cr, 2.0); 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 = 1.0 - (gdouble) ((i + step) % num_steps) / num_steps; gdouble xscale = - sin (i * G_PI / half); gdouble yscale = - cos (i * G_PI / half); cairo_set_source_rgba (cr, color->red, color->green, color->blue, color->alpha * t); cairo_move_to (cr, (radius - inset) * xscale, (radius - inset) * yscale); cairo_line_to (cr, radius * xscale, radius * yscale); cairo_stroke (cr); } cairo_restore (cr); } static void render_spinner (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStateFlags state; GdkRGBA color; gdouble radius; state = gtk_theming_engine_get_state (engine); radius = MIN (width / 2, height / 2); gtk_theming_engine_get_color (engine, state, &color); cairo_save (cr); cairo_translate (cr, x + width / 2, y + height / 2); _gtk_css_shadows_value_paint_spinner (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_ICON_SHADOW), cr, radius, -1); _gtk_theming_engine_paint_spinner (cr, radius, -1, &color); cairo_restore (cr); } static void gtk_theming_engine_render_activity (GtkThemingEngine *engine, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkThemingBackground bg; _gtk_theming_background_init (&bg, engine, x, y, width, height, 0); if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_SPINNER) && !_gtk_theming_background_has_background_image (&bg)) { render_spinner (engine, cr, x, y, width, height); } else { _gtk_theming_background_render (&bg, cr); 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 void colorshift_source (cairo_t *cr, gdouble shift) { cairo_pattern_t *source; cairo_save (cr); cairo_paint (cr); source = cairo_pattern_reference (cairo_get_source (cr)); cairo_set_source_rgb (cr, shift, shift, shift); cairo_set_operator (cr, CAIRO_OPERATOR_COLOR_DODGE); cairo_mask (cr, source); cairo_pattern_destroy (source); cairo_restore (cr); } 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; cairo_t *cr; cairo_surface_t *surface; 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) { surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, gdk_pixbuf_get_width (scaled), gdk_pixbuf_get_height (scaled)); cr = cairo_create (surface); gdk_cairo_set_source_pixbuf (cr, scaled, 0, 0); cairo_paint_with_alpha (cr, 0.5); cairo_destroy (cr); g_object_unref (scaled); stated = gdk_pixbuf_get_from_surface (surface, 0, 0, cairo_image_surface_get_width (surface), cairo_image_surface_get_height (surface)); cairo_surface_destroy (surface); } else if (state & GTK_STATE_FLAG_PRELIGHT) { surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, gdk_pixbuf_get_width (scaled), gdk_pixbuf_get_height (scaled)); cr = cairo_create (surface); gdk_cairo_set_source_pixbuf (cr, scaled, 0, 0); colorshift_source (cr, 0.10); cairo_destroy (cr); g_object_unref (scaled); stated = gdk_pixbuf_get_from_surface (surface, 0, 0, cairo_image_surface_get_width (surface), cairo_image_surface_get_height (surface)); cairo_surface_destroy (surface); } else stated = scaled; } else stated = scaled; return stated; } static void gtk_theming_engine_render_icon (GtkThemingEngine *engine, cairo_t *cr, GdkPixbuf *pixbuf, gdouble x, gdouble y) { cairo_save (cr); gdk_cairo_set_source_pixbuf (cr, pixbuf, x, y); _gtk_css_shadows_value_paint_icon (_gtk_theming_engine_peek_property (engine, GTK_CSS_PROPERTY_ICON_SHADOW), cr); cairo_paint (cr); cairo_restore (cr); }