/* 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 "gtkstylecontextprivate.h" #include "gtkstylepropertiesprivate.h" #include "gtktypebuiltins.h" #include "gtkthemingengine.h" #include "gtkintl.h" #include "gtkwidget.h" #include "gtkwindow.h" #include "gtkprivate.h" #include "gtksymboliccolor.h" #include "gtkanimationdescription.h" #include "gtktimeline.h" #include "gtkiconfactory.h" #include "gtkwidgetprivate.h" /** * SECTION:gtkstylecontext * @Short_description: Rendering UI elements * @Title: GtkStyleContext * * #GtkStyleContext is an object that stores styling information affecting * a widget defined by #GtkWidgetPath. * * In order to construct the final style information, #GtkStyleContext * queries information from all attached #GtkStyleProviders. Style providers * can be either attached explicitly to the context through * gtk_style_context_add_provider(), or to the screen through * gtk_style_context_add_provider_for_screen(). The resulting style is a * combination of all providers' information in priority order. * * For GTK+ widgets, any #GtkStyleContext returned by * gtk_widget_get_style_context() will already have a #GtkWidgetPath, a * #GdkScreen and RTL/LTR information set. The style context will be also * updated automatically if any of these settings change on the widget. * * If you are using the theming layer standalone, you will need to set a * widget path and a screen yourself to the created style context through * gtk_style_context_set_path() and gtk_style_context_set_screen(), as well * as updating the context yourself using gtk_style_context_invalidate() * whenever any of the conditions change, such as a change in the * #GtkSettings:gtk-theme-name setting or a hierarchy change in the rendered * widget. * * * Transition animations * * #GtkStyleContext has built-in support for state change transitions. * Note that these animations respect the #GtkSettings:gtk-enable-animations * setting. * * * For simple widgets where state changes affect the whole widget area, * calling gtk_style_context_notify_state_change() with a %NULL region * is sufficient to trigger the transition animation. And GTK+ already * does that when gtk_widget_set_state() or gtk_widget_set_state_flags() * are called. * * * If a widget needs to declare several animatable regions (i.e. not * affecting the whole widget area), its #GtkWidget::draw signal handler * needs to wrap the render operations for the different regions with * calls to gtk_style_context_push_animatable_region() and * gtk_style_context_pop_animatable_region(). These functions take an * identifier for the region which must be unique within the style context. * For simple widgets with a fixed set of animatable regions, using an * enumeration works well: * * * Using an enumeration to identify animatable regions * * enum { * REGION_ENTRY, * REGION_BUTTON_UP, * REGION_BUTTON_DOWN * }; * * ... * * gboolean * spin_button_draw (GtkWidget *widget, * cairo_t *cr) * { * GtkStyleContext *context; * * context = gtk_widget_get_style_context (widget); * * gtk_style_context_push_animatable_region (context, * GUINT_TO_POINTER (REGION_ENTRY)); * * gtk_render_background (cr, 0, 0, 100, 30); * gtk_render_frame (cr, 0, 0, 100, 30); * * gtk_style_context_pop_animatable_region (context); * * ... * } * * * * For complex widgets with an arbitrary number of animatable regions, it * is up to the implementation to come up with a way to uniquely identify * each animatable region. Using pointers to internal structs is one way * to achieve this: * * * Using struct pointers to identify animatable regions * * void * notebook_draw_tab (GtkWidget *widget, * NotebookPage *page, * cairo_t *cr) * { * gtk_style_context_push_animatable_region (context, page); * gtk_render_extension (cr, page->x, page->y, page->width, page->height); * gtk_style_context_pop_animatable_region (context); * } * * * * The widget also needs to notify the style context about a state change * for a given animatable region so the animation is triggered. * * * Triggering a state change animation on a region * * gboolean * notebook_motion_notify (GtkWidget *widget, * GdkEventMotion *event) * { * GtkStyleContext *context; * NotebookPage *page; * * context = gtk_widget_get_style_context (widget); * page = find_page_under_pointer (widget, event); * gtk_style_context_notify_state_change (context, * gtk_widget_get_window (widget), * page, * GTK_STATE_PRELIGHT, * TRUE); * ... * } * * * * gtk_style_context_notify_state_change() accepts %NULL region IDs as a * special value, in this case, the whole widget area will be updated * by the animation. * * * * Style classes and regions * * Widgets can add style classes to their context, which can be used * to associate different styles by class (see ). Theme engines can also use style classes to vary their * rendering. GTK+ has a number of predefined style classes: * #GTK_STYLE_CLASS_CELL, * #GTK_STYLE_CLASS_ENTRY, * #GTK_STYLE_CLASS_BUTTON, * #GTK_STYLE_CLASS_COMBOBOX_ENTRY, * #GTK_STYLE_CLASS_CALENDAR, * #GTK_STYLE_CLASS_SLIDER, * #GTK_STYLE_CLASS_BACKGROUND, * #GTK_STYLE_CLASS_RUBBERBAND, * #GTK_STYLE_CLASS_TOOLTIP, * #GTK_STYLE_CLASS_MENU, * #GTK_STYLE_CLASS_MENUBAR, * #GTK_STYLE_CLASS_MENUITEM, * #GTK_STYLE_CLASS_TOOLBAR, * #GTK_STYLE_CLASS_PRIMARY_TOOLBAR, * #GTK_STYLE_CLASS_INLINE_TOOLBAR, * #GTK_STYLE_CLASS_RADIO, * #GTK_STYLE_CLASS_CHECK, * #GTK_STYLE_CLASS_TROUGH, * #GTK_STYLE_CLASS_SCROLLBAR, * #GTK_STYLE_CLASS_SCALE, * #GTK_STYLE_CLASS_SCALE_HAS_MARKS_ABOVE, * #GTK_STYLE_CLASS_SCALE_HAS_MARKS_BELOW, * #GTK_STYLE_CLASS_HEADER, * #GTK_STYLE_CLASS_ACCELERATOR, * #GTK_STYLE_CLASS_GRIP, * #GTK_STYLE_CLASS_DOCK, * #GTK_STYLE_CLASS_PROGRESSBAR, * #GTK_STYLE_CLASS_SPINNER, * #GTK_STYLE_CLASS_EXPANDER, * #GTK_STYLE_CLASS_SPINBUTTON, * #GTK_STYLE_CLASS_NOTEBOOK, * #GTK_STYLE_CLASS_VIEW, * #GTK_STYLE_CLASS_SIDEBAR, * #GTK_STYLE_CLASS_IMAGE, * #GTK_STYLE_CLASS_HIGHLIGHT, * #GTK_STYLE_CLASS_FRAME, * #GTK_STYLE_CLASS_DND, * #GTK_STYLE_CLASS_PANE_SEPARATOR, * #GTK_STYLE_CLASS_SEPARATOR, * #GTK_STYLE_CLASS_INFO, * #GTK_STYLE_CLASS_WARNING, * #GTK_STYLE_CLASS_QUESTION, * #GTK_STYLE_CLASS_ERROR, * #GTK_STYLE_CLASS_HORIZONTAL, * #GTK_STYLE_CLASS_VERTICAL. * * * Widgets can also add regions with flags to their context. * The regions used by GTK+ widgets are: * * * * * Region * Flags * Macro * Used by * * * * * row * even, odd * GTK_STYLE_REGION_ROW * #GtkTreeView * * * column * first, last, sorted * GTK_STYLE_REGION_COLUMN * #GtkTreeView * * * column-header * * GTK_STYLE_REGION_COLUMN_HEADER * * * * tab * even, odd, first, last * GTK_STYLE_REGION_TAB * #GtkNotebook * * * * * * * * Custom styling in UI libraries and applications * * If you are developing a library with custom #GtkWidgets that * render differently than standard components, you may need to add a * #GtkStyleProvider yourself with the %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK * priority, either a #GtkCssProvider or a custom object implementing the * #GtkStyleProvider interface. This way theming engines may still attempt * to style your UI elements in a different way if needed so. * * * If you are using custom styling on an applications, you probably want then * to make your style information prevail to the theme's, so you must use * a #GtkStyleProvider with the %GTK_STYLE_PROVIDER_PRIORITY_APPLICATION * priority, keep in mind that the user settings in * XDG_CONFIG_HOME/gtk-3.0/gtk.css will * still take precedence over your changes, as it uses the * %GTK_STYLE_PROVIDER_PRIORITY_USER priority. * * * If a custom theming engine is needed, you probably want to implement a * #GtkStyleProvider yourself so it points to your #GtkThemingEngine * implementation, as #GtkCssProvider uses gtk_theming_engine_load() * which loads the theming engine module from the standard paths. * * */ typedef struct GtkStyleProviderData GtkStyleProviderData; typedef struct GtkStyleInfo GtkStyleInfo; typedef struct GtkRegion GtkRegion; typedef struct PropertyValue PropertyValue; typedef struct AnimationInfo AnimationInfo; typedef struct StyleData StyleData; struct GtkRegion { GQuark class_quark; GtkRegionFlags flags; }; struct GtkStyleProviderData { GtkStyleProvider *provider; guint priority; }; struct PropertyValue { GType widget_type; GParamSpec *pspec; GtkStateFlags state; GValue value; }; struct GtkStyleInfo { GArray *style_classes; GArray *regions; GtkJunctionSides junction_sides; GtkStateFlags state_flags; }; struct StyleData { GtkStyleProperties *store; GSList *icon_factories; GArray *property_cache; }; struct AnimationInfo { GtkTimeline *timeline; gpointer region_id; /* Region stack (until region_id) at the time of * rendering, this is used for nested cancellation. */ GSList *parent_regions; GdkWindow *window; GtkStateType state; gboolean target_value; cairo_region_t *invalidation_region; GArray *rectangles; }; struct _GtkStyleContextPrivate { GdkScreen *screen; GList *providers; GList *providers_last; GtkWidgetPath *widget_path; GHashTable *style_data; GSList *info_stack; StyleData *current_data; GSList *animation_regions; GSList *animations; GtkThemingEngine *theming_engine; GtkTextDirection direction; guint animations_invalidated : 1; guint invalidating_context : 1; }; enum { PROP_0, PROP_SCREEN, PROP_DIRECTION }; enum { CHANGED, LAST_SIGNAL }; static guint signals[LAST_SIGNAL] = { 0 }; static GQuark provider_list_quark = 0; static void gtk_style_context_finalize (GObject *object); static void gtk_style_context_impl_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_style_context_impl_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); G_DEFINE_TYPE (GtkStyleContext, gtk_style_context, G_TYPE_OBJECT) static void gtk_style_context_class_init (GtkStyleContextClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); object_class->finalize = gtk_style_context_finalize; object_class->set_property = gtk_style_context_impl_set_property; object_class->get_property = gtk_style_context_impl_get_property; signals[CHANGED] = g_signal_new (I_("changed"), G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GtkStyleContextClass, changed), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); g_object_class_install_property (object_class, PROP_SCREEN, g_param_spec_object ("screen", P_("Screen"), P_("The associated GdkScreen"), GDK_TYPE_SCREEN, GTK_PARAM_READWRITE)); g_object_class_install_property (object_class, PROP_DIRECTION, g_param_spec_enum ("direction", P_("Direction"), P_("Text direction"), GTK_TYPE_TEXT_DIRECTION, GTK_TEXT_DIR_LTR, GTK_PARAM_READWRITE)); g_type_class_add_private (object_class, sizeof (GtkStyleContextPrivate)); } static GtkStyleInfo * style_info_new (void) { GtkStyleInfo *info; info = g_slice_new0 (GtkStyleInfo); info->style_classes = g_array_new (FALSE, FALSE, sizeof (GQuark)); info->regions = g_array_new (FALSE, FALSE, sizeof (GtkRegion)); return info; } static void style_info_free (GtkStyleInfo *info) { g_array_free (info->style_classes, TRUE); g_array_free (info->regions, TRUE); g_slice_free (GtkStyleInfo, info); } static GtkStyleInfo * style_info_copy (const GtkStyleInfo *info) { GtkStyleInfo *copy; copy = style_info_new (); g_array_insert_vals (copy->style_classes, 0, info->style_classes->data, info->style_classes->len); g_array_insert_vals (copy->regions, 0, info->regions->data, info->regions->len); copy->junction_sides = info->junction_sides; copy->state_flags = info->state_flags; return copy; } static guint style_info_hash (gconstpointer elem) { const GtkStyleInfo *info; guint i, hash = 0; info = elem; for (i = 0; i < info->style_classes->len; i++) { hash += g_array_index (info->style_classes, GQuark, i); hash <<= 5; } for (i = 0; i < info->regions->len; i++) { GtkRegion *region; region = &g_array_index (info->regions, GtkRegion, i); hash += region->class_quark; hash += region->flags; hash <<= 5; } return hash; } static gboolean style_info_equal (gconstpointer elem1, gconstpointer elem2) { const GtkStyleInfo *info1, *info2; info1 = elem1; info2 = elem2; if (info1->junction_sides != info2->junction_sides) return FALSE; if (info1->style_classes->len != info2->style_classes->len) return FALSE; if (memcmp (info1->style_classes->data, info2->style_classes->data, info1->style_classes->len * sizeof (GQuark)) != 0) return FALSE; if (info1->regions->len != info2->regions->len) return FALSE; if (memcmp (info1->regions->data, info2->regions->data, info1->regions->len * sizeof (GtkRegion)) != 0) return FALSE; return TRUE; } static StyleData * style_data_new (void) { StyleData *data; data = g_slice_new0 (StyleData); data->store = gtk_style_properties_new (); return data; } static void clear_property_cache (StyleData *data) { guint i; if (!data->property_cache) return; for (i = 0; i < data->property_cache->len; i++) { PropertyValue *node = &g_array_index (data->property_cache, PropertyValue, i); g_param_spec_unref (node->pspec); g_value_unset (&node->value); } g_array_free (data->property_cache, TRUE); data->property_cache = NULL; } static void style_data_free (StyleData *data) { g_object_unref (data->store); clear_property_cache (data); g_slist_foreach (data->icon_factories, (GFunc) g_object_unref, NULL); g_slist_free (data->icon_factories); g_slice_free (StyleData, data); } static void gtk_style_context_init (GtkStyleContext *style_context) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; priv = style_context->priv = G_TYPE_INSTANCE_GET_PRIVATE (style_context, GTK_TYPE_STYLE_CONTEXT, GtkStyleContextPrivate); priv->style_data = g_hash_table_new_full (style_info_hash, style_info_equal, (GDestroyNotify) style_info_free, (GDestroyNotify) style_data_free); priv->theming_engine = g_object_ref ((gpointer) gtk_theming_engine_load (NULL)); priv->direction = GTK_TEXT_DIR_LTR; priv->screen = gdk_screen_get_default (); /* Create default info store */ info = style_info_new (); priv->info_stack = g_slist_prepend (priv->info_stack, info); } static GtkStyleProviderData * style_provider_data_new (GtkStyleProvider *provider, guint priority) { GtkStyleProviderData *data; data = g_slice_new (GtkStyleProviderData); data->provider = g_object_ref (provider); data->priority = priority; return data; } static void style_provider_data_free (GtkStyleProviderData *data) { g_object_unref (data->provider); g_slice_free (GtkStyleProviderData, data); } static void animation_info_free (AnimationInfo *info) { g_object_unref (info->timeline); g_object_unref (info->window); if (info->invalidation_region) cairo_region_destroy (info->invalidation_region); g_array_free (info->rectangles, TRUE); g_slist_free (info->parent_regions); g_slice_free (AnimationInfo, info); } static AnimationInfo * animation_info_lookup_by_timeline (GtkStyleContext *context, GtkTimeline *timeline) { GtkStyleContextPrivate *priv; AnimationInfo *info; GSList *l; priv = context->priv; for (l = priv->animations; l; l = l->next) { info = l->data; if (info->timeline == timeline) return info; } return NULL; } static void timeline_frame_cb (GtkTimeline *timeline, gdouble progress, gpointer user_data) { GtkStyleContextPrivate *priv; GtkStyleContext *context; AnimationInfo *info; context = user_data; priv = context->priv; info = animation_info_lookup_by_timeline (context, timeline); g_assert (info != NULL); /* Cancel transition if window is gone */ if (gdk_window_is_destroyed (info->window) || !gdk_window_is_visible (info->window)) { priv->animations = g_slist_remove (priv->animations, info); animation_info_free (info); return; } if (info->invalidation_region && !cairo_region_is_empty (info->invalidation_region)) gdk_window_invalidate_region (info->window, info->invalidation_region, TRUE); else gdk_window_invalidate_rect (info->window, NULL, TRUE); } static void timeline_finished_cb (GtkTimeline *timeline, gpointer user_data) { GtkStyleContextPrivate *priv; GtkStyleContext *context; AnimationInfo *info; context = user_data; priv = context->priv; info = animation_info_lookup_by_timeline (context, timeline); g_assert (info != NULL); priv->animations = g_slist_remove (priv->animations, info); /* Invalidate one last time the area, so the final content is painted */ if (info->invalidation_region && !cairo_region_is_empty (info->invalidation_region)) gdk_window_invalidate_region (info->window, info->invalidation_region, TRUE); else gdk_window_invalidate_rect (info->window, NULL, TRUE); animation_info_free (info); } static AnimationInfo * animation_info_new (GtkStyleContext *context, gpointer region_id, guint duration, GtkTimelineProgressType progress_type, gboolean loop, GtkStateType state, gboolean target_value, GdkWindow *window) { AnimationInfo *info; info = g_slice_new0 (AnimationInfo); info->rectangles = g_array_new (FALSE, FALSE, sizeof (cairo_rectangle_int_t)); info->timeline = _gtk_timeline_new (duration); info->window = g_object_ref (window); info->state = state; info->target_value = target_value; info->region_id = region_id; _gtk_timeline_set_progress_type (info->timeline, progress_type); _gtk_timeline_set_loop (info->timeline, loop); if (!loop && !target_value) { _gtk_timeline_set_direction (info->timeline, GTK_TIMELINE_DIRECTION_BACKWARD); _gtk_timeline_rewind (info->timeline); } g_signal_connect (info->timeline, "frame", G_CALLBACK (timeline_frame_cb), context); g_signal_connect (info->timeline, "finished", G_CALLBACK (timeline_finished_cb), context); _gtk_timeline_start (info->timeline); return info; } static AnimationInfo * animation_info_lookup (GtkStyleContext *context, gpointer region_id, GtkStateType state) { GtkStyleContextPrivate *priv; GSList *l; priv = context->priv; for (l = priv->animations; l; l = l->next) { AnimationInfo *info; info = l->data; if (info->state == state && info->region_id == region_id) return info; } return NULL; } static void gtk_style_context_finalize (GObject *object) { GtkStyleContextPrivate *priv; GtkStyleContext *style_context; GSList *l; style_context = GTK_STYLE_CONTEXT (object); priv = style_context->priv; if (priv->widget_path) gtk_widget_path_free (priv->widget_path); g_hash_table_destroy (priv->style_data); g_list_foreach (priv->providers, (GFunc) style_provider_data_free, NULL); g_list_free (priv->providers); g_slist_foreach (priv->info_stack, (GFunc) style_info_free, NULL); g_slist_free (priv->info_stack); g_slist_free (priv->animation_regions); for (l = priv->animations; l; l = l->next) animation_info_free ((AnimationInfo *) l->data); g_slist_free (priv->animations); if (priv->theming_engine) g_object_unref (priv->theming_engine); G_OBJECT_CLASS (gtk_style_context_parent_class)->finalize (object); } static void gtk_style_context_impl_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkStyleContext *style_context; style_context = GTK_STYLE_CONTEXT (object); switch (prop_id) { case PROP_SCREEN: gtk_style_context_set_screen (style_context, g_value_get_object (value)); break; case PROP_DIRECTION: gtk_style_context_set_direction (style_context, g_value_get_enum (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_style_context_impl_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkStyleContext *style_context; GtkStyleContextPrivate *priv; style_context = GTK_STYLE_CONTEXT (object); priv = style_context->priv; switch (prop_id) { case PROP_SCREEN: g_value_set_object (value, priv->screen); break; case PROP_DIRECTION: g_value_set_enum (value, priv->direction); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GList * find_next_candidate (GList *local, GList *global, gboolean ascending) { if (local && global) { GtkStyleProviderData *local_data, *global_data; local_data = local->data; global_data = global->data; if (local_data->priority < global_data->priority) return (ascending) ? local : global; else return (ascending) ? global : local; } else if (local) return local; else if (global) return global; return NULL; } static void build_properties (GtkStyleContext *context, StyleData *style_data, GtkWidgetPath *path) { GtkStyleContextPrivate *priv; GList *elem, *list, *global_list = NULL; priv = context->priv; list = priv->providers; if (priv->screen) global_list = g_object_get_qdata (G_OBJECT (priv->screen), provider_list_quark); while ((elem = find_next_candidate (list, global_list, TRUE)) != NULL) { GtkStyleProviderData *data; GtkStyleProperties *provider_style; data = elem->data; if (elem == list) list = list->next; else global_list = global_list->next; provider_style = gtk_style_provider_get_style (data->provider, path); if (provider_style) { gtk_style_properties_merge (style_data->store, provider_style, TRUE); g_object_unref (provider_style); } } } static void build_icon_factories (GtkStyleContext *context, StyleData *style_data, GtkWidgetPath *path) { GtkStyleContextPrivate *priv; GList *elem, *list, *global_list = NULL; priv = context->priv; list = priv->providers_last; if (priv->screen) { global_list = g_object_get_qdata (G_OBJECT (priv->screen), provider_list_quark); global_list = g_list_last (global_list); } while ((elem = find_next_candidate (list, global_list, FALSE)) != NULL) { GtkIconFactory *factory; GtkStyleProviderData *data; data = elem->data; if (elem == list) list = list->prev; else global_list = global_list->prev; factory = gtk_style_provider_get_icon_factory (data->provider, path); if (factory) style_data->icon_factories = g_slist_prepend (style_data->icon_factories, factory); } } static GtkWidgetPath * create_query_path (GtkStyleContext *context) { GtkStyleContextPrivate *priv; GtkWidgetPath *path; GtkStyleInfo *info; guint i, pos; priv = context->priv; path = gtk_widget_path_copy (priv->widget_path); pos = gtk_widget_path_length (path) - 1; info = priv->info_stack->data; /* Set widget regions */ for (i = 0; i < info->regions->len; i++) { GtkRegion *region; region = &g_array_index (info->regions, GtkRegion, i); gtk_widget_path_iter_add_region (path, pos, g_quark_to_string (region->class_quark), region->flags); } /* Set widget classes */ for (i = 0; i < info->style_classes->len; i++) { GQuark quark; quark = g_array_index (info->style_classes, GQuark, i); gtk_widget_path_iter_add_class (path, pos, g_quark_to_string (quark)); } return path; } static StyleData * style_data_lookup (GtkStyleContext *context) { GtkStyleContextPrivate *priv; StyleData *data; priv = context->priv; /* Current data in use is cached, just return it */ if (priv->current_data) return priv->current_data; g_assert (priv->widget_path != NULL); data = g_hash_table_lookup (priv->style_data, priv->info_stack->data); if (!data) { GtkWidgetPath *path; data = style_data_new (); path = create_query_path (context); build_properties (context, data, path); build_icon_factories (context, data, path); g_hash_table_insert (priv->style_data, style_info_copy (priv->info_stack->data), data); gtk_widget_path_free (path); } priv->current_data = data; if (priv->theming_engine) g_object_unref (priv->theming_engine); gtk_style_properties_get (data->store, 0, "engine", &priv->theming_engine, NULL); if (!priv->theming_engine) priv->theming_engine = g_object_ref (gtk_theming_engine_load (NULL)); return data; } static void style_provider_add (GList **list, GtkStyleProvider *provider, guint priority) { GtkStyleProviderData *new_data; gboolean added = FALSE; GList *l = *list; new_data = style_provider_data_new (provider, priority); while (l) { GtkStyleProviderData *data; data = l->data; /* Provider was already attached to the style * context, remove in order to add the new data */ if (data->provider == provider) { GList *link; link = l; l = l->next; /* Remove and free link */ *list = g_list_remove_link (*list, link); style_provider_data_free (link->data); g_list_free_1 (link); continue; } if (!added && data->priority > priority) { *list = g_list_insert_before (*list, l, new_data); added = TRUE; } l = l->next; } if (!added) *list = g_list_append (*list, new_data); } static gboolean style_provider_remove (GList **list, GtkStyleProvider *provider) { GList *l = *list; while (l) { GtkStyleProviderData *data; data = l->data; if (data->provider == provider) { *list = g_list_remove_link (*list, l); style_provider_data_free (l->data); g_list_free_1 (l); return TRUE; } l = l->next; } return FALSE; } /** * gtk_style_context_new: * * Creates a standalone #GtkStyleContext, this style context * won't be attached to any widget, so you may want * to call gtk_style_context_set_path() yourself. * * * This function is only useful when using the theming layer * separated from GTK+, if you are using #GtkStyleContext to * theme #GtkWidgets, use gtk_widget_get_style_context() * in order to get a style context ready to theme the widget. * * * Returns: A newly created #GtkStyleContext. **/ GtkStyleContext * gtk_style_context_new (void) { return g_object_new (GTK_TYPE_STYLE_CONTEXT, NULL); } /** * gtk_style_context_add_provider: * @context: a #GtkStyleContext * @provider: a #GtkStyleProvider * @priority: the priority of the style provider. The lower * it is, the earlier it will be used in the style * construction. Typically this will be in the range * between %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and * %GTK_STYLE_PROVIDER_PRIORITY_USER * * Adds a style provider to @context, to be used in style construction. * * If both priorities are the same, A #GtkStyleProvider * added through this function takes precedence over another added * through gtk_style_context_add_provider_for_screen(). * * Since: 3.0 **/ void gtk_style_context_add_provider (GtkStyleContext *context, GtkStyleProvider *provider, guint priority) { GtkStyleContextPrivate *priv; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider)); priv = context->priv; style_provider_add (&priv->providers, provider, priority); priv->providers_last = g_list_last (priv->providers); gtk_style_context_invalidate (context); } /** * gtk_style_context_remove_provider: * @context: a #GtkStyleContext * @provider: a #GtkStyleProvider * * Removes @provider from the style providers list in @context. * * Since: 3.0 **/ void gtk_style_context_remove_provider (GtkStyleContext *context, GtkStyleProvider *provider) { GtkStyleContextPrivate *priv; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider)); priv = context->priv; if (style_provider_remove (&priv->providers, provider)) { priv->providers_last = g_list_last (priv->providers); gtk_style_context_invalidate (context); } } /** * gtk_style_context_reset_widgets: * @screen: a #GdkScreen * * This function recomputes the styles for all widgets under a particular * #GdkScreen. This is useful when some global parameter has changed that * affects the appearance of all widgets, because when a widget gets a new * style, it will both redraw and recompute any cached information about * its appearance. As an example, it is used when the color scheme changes * in the related #GtkSettings object. * * Since: 3.0 **/ void gtk_style_context_reset_widgets (GdkScreen *screen) { GList *list, *toplevels; _gtk_icon_set_invalidate_caches (); toplevels = gtk_window_list_toplevels (); g_list_foreach (toplevels, (GFunc) g_object_ref, NULL); for (list = toplevels; list; list = list->next) { if (gtk_widget_get_screen (list->data) == screen) gtk_widget_reset_style (list->data); g_object_unref (list->data); } g_list_free (toplevels); } /** * gtk_style_context_add_provider_for_screen: * @screen: a #GdkScreen * @provider: a #GtkStyleProvider * @priority: the priority of the style provider. The lower * it is, the earlier it will be used in the style * construction. Typically this will be in the range * between %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and * %GTK_STYLE_PROVIDER_PRIORITY_USER * * Adds a global style provider to @screen, which will be used * in style construction for all #GtkStyleContexts under * @screen. * * GTK+ uses this to make styling information from #GtkSettings * available. * * If both priorities are the same, A #GtkStyleProvider * added through gtk_style_context_add_provider() takes precedence * over another added through this function. * * Since: 3.0 **/ void gtk_style_context_add_provider_for_screen (GdkScreen *screen, GtkStyleProvider *provider, guint priority) { GList *providers, *list; g_return_if_fail (GDK_IS_SCREEN (screen)); g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider)); if (G_UNLIKELY (!provider_list_quark)) provider_list_quark = g_quark_from_static_string ("gtk-provider-list-quark"); list = providers = g_object_get_qdata (G_OBJECT (screen), provider_list_quark); style_provider_add (&list, provider, priority); if (list != providers) g_object_set_qdata (G_OBJECT (screen), provider_list_quark, list); gtk_style_context_reset_widgets (screen); } /** * gtk_style_context_remove_provider_for_screen: * @screen: a #GdkScreen * @provider: a #GtkStyleProvider * * Removes @provider from the global style providers list in @screen. * * Since: 3.0 **/ void gtk_style_context_remove_provider_for_screen (GdkScreen *screen, GtkStyleProvider *provider) { GList *providers, *list; g_return_if_fail (GDK_IS_SCREEN (screen)); g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider)); if (G_UNLIKELY (!provider_list_quark)) return; list = providers = g_object_get_qdata (G_OBJECT (screen), provider_list_quark); if (style_provider_remove (&list, provider)) { if (list != providers) g_object_set_qdata (G_OBJECT (screen), provider_list_quark, list); gtk_style_context_reset_widgets (screen); } } /** * gtk_style_context_get_property: * @context: a #GtkStyleContext * @property: style property name * @state: state to retrieve the property value for * @value: (out) (transfer full): return location for the style property value * * Gets a style property from @context for the given state. * * When @value is no longer needed, g_value_unset() must be called * to free any allocated memory. * * Since: 3.0 **/ void gtk_style_context_get_property (GtkStyleContext *context, const gchar *property, GtkStateFlags state, GValue *value) { GtkStyleContextPrivate *priv; StyleData *data; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (property != NULL); g_return_if_fail (value != NULL); priv = context->priv; g_return_if_fail (priv->widget_path != NULL); data = style_data_lookup (context); gtk_style_properties_get_property (data->store, property, state, value); } /** * gtk_style_context_get_valist: * @context: a #GtkStyleContext * @state: state to retrieve the property values for * @args: va_list of property name/return location pairs, followed by %NULL * * Retrieves several style property values from @context for a given state. * * Since: 3.0 **/ void gtk_style_context_get_valist (GtkStyleContext *context, GtkStateFlags state, va_list args) { GtkStyleContextPrivate *priv; StyleData *data; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; g_return_if_fail (priv->widget_path != NULL); data = style_data_lookup (context); gtk_style_properties_get_valist (data->store, state, args); } /** * gtk_style_context_get: * @context: a #GtkStyleContext * @state: state to retrieve the property values for * @...: property name /return value pairs, followed by %NULL * * Retrieves several style property values from @context for a * given state. * * Since: 3.0 **/ void gtk_style_context_get (GtkStyleContext *context, GtkStateFlags state, ...) { GtkStyleContextPrivate *priv; StyleData *data; va_list args; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; g_return_if_fail (priv->widget_path != NULL); data = style_data_lookup (context); va_start (args, state); gtk_style_properties_get_valist (data->store, state, args); va_end (args); } /** * gtk_style_context_set_state: * @context: a #GtkStyleContext * @flags: state to represent * * Sets the state to be used when rendering with any * of the gtk_render_*() functions. * * Since: 3.0 **/ void gtk_style_context_set_state (GtkStyleContext *context, GtkStateFlags flags) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; info = priv->info_stack->data; info->state_flags = flags; } /** * gtk_style_context_get_state: * @context: a #GtkStyleContext * * Returns the state used when rendering. * * Returns: the state flags * * Since: 3.0 **/ GtkStateFlags gtk_style_context_get_state (GtkStyleContext *context) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0); priv = context->priv; info = priv->info_stack->data; return info->state_flags; } static gboolean context_has_animatable_region (GtkStyleContext *context, gpointer region_id) { GtkStyleContextPrivate *priv; /* NULL region_id means everything * rendered through the style context */ if (!region_id) return TRUE; priv = context->priv; return g_slist_find (priv->animation_regions, region_id) != NULL; } /** * gtk_style_context_state_is_running: * @context: a #GtkStyleContext * @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 unset, while 1.0 means * it's closest to being set. This means transition animation will * run from 0 to 1 when @state is being set and from 1 to 0 when * it's being unset. * * Returns: %TRUE if there is a running transition animation for @state. * * Since: 3.0 **/ gboolean gtk_style_context_state_is_running (GtkStyleContext *context, GtkStateType state, gdouble *progress) { GtkStyleContextPrivate *priv; AnimationInfo *info; GSList *l; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE); priv = context->priv; for (l = priv->animations; l; l = l->next) { info = l->data; if (info->state == state && context_has_animatable_region (context, info->region_id)) { if (progress) *progress = _gtk_timeline_get_progress (info->timeline); return TRUE; } } return FALSE; } /** * gtk_style_context_set_path: * @context: a #GtkStyleContext * @path: a #GtkWidgetPath * * Sets the #GtkWidgetPath used for style matching. As a * consequence, the style will be regenerated to match * the new given path. * * If you are using a #GtkStyleContext returned from * gtk_widget_get_style_context(), you do not need to call * this yourself. * * Since: 3.0 **/ void gtk_style_context_set_path (GtkStyleContext *context, GtkWidgetPath *path) { GtkStyleContextPrivate *priv; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (path != NULL); priv = context->priv; if (priv->widget_path) { gtk_widget_path_free (priv->widget_path); priv->widget_path = NULL; } if (path) priv->widget_path = gtk_widget_path_copy (path); gtk_style_context_invalidate (context); } /** * gtk_style_context_get_path: * @context: a #GtkStyleContext * * Returns the widget path used for style matching. * * Returns: (transfer none): A #GtkWidgetPath * * Since: 3.0 **/ const GtkWidgetPath * gtk_style_context_get_path (GtkStyleContext *context) { GtkStyleContextPrivate *priv; priv = context->priv; return priv->widget_path; } /** * gtk_style_context_save: * @context: a #GtkStyleContext * * Saves the @context state, so all modifications done through * gtk_style_context_add_class(), gtk_style_context_remove_class(), * gtk_style_context_add_region(), gtk_style_context_remove_region() * or gtk_style_context_set_junction_sides() can be reverted in one * go through gtk_style_context_restore(). * * Since: 3.0 **/ void gtk_style_context_save (GtkStyleContext *context) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; g_assert (priv->info_stack != NULL); info = style_info_copy (priv->info_stack->data); priv->info_stack = g_slist_prepend (priv->info_stack, info); } /** * gtk_style_context_restore: * @context: a #GtkStyleContext * * Restores @context state to a previous stage. * See gtk_style_context_save(). * * Since: 3.0 **/ void gtk_style_context_restore (GtkStyleContext *context) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; if (priv->info_stack) { info = priv->info_stack->data; priv->info_stack = g_slist_remove (priv->info_stack, info); style_info_free (info); } if (!priv->info_stack) { g_warning ("Unpaired gtk_style_context_restore() call"); /* Create default region */ info = style_info_new (); priv->info_stack = g_slist_prepend (priv->info_stack, info); } priv->current_data = NULL; } static gboolean style_class_find (GArray *array, GQuark class_quark, guint *position) { gint min, max, mid; gboolean found = FALSE; guint pos; if (position) *position = 0; if (!array || array->len == 0) return FALSE; min = 0; max = array->len - 1; do { GQuark item; mid = (min + max) / 2; item = g_array_index (array, GQuark, mid); if (class_quark == item) { found = TRUE; pos = mid; } else if (class_quark > item) min = pos = mid + 1; else { max = mid - 1; pos = mid; } } while (!found && min <= max); if (position) *position = pos; return found; } static gboolean region_find (GArray *array, GQuark class_quark, guint *position) { gint min, max, mid; gboolean found = FALSE; guint pos; if (position) *position = 0; if (!array || array->len == 0) return FALSE; min = 0; max = array->len - 1; do { GtkRegion *region; mid = (min + max) / 2; region = &g_array_index (array, GtkRegion, mid); if (region->class_quark == class_quark) { found = TRUE; pos = mid; } else if (region->class_quark > class_quark) min = pos = mid + 1; else { max = mid - 1; pos = mid; } } while (!found && min <= max); if (position) *position = pos; return found; } /** * gtk_style_context_add_class: * @context: a #GtkStyleContext * @class_name: class name to use in styling * * Adds a style class to @context, so posterior calls to * gtk_style_context_get() or any of the gtk_render_*() * functions will make use of this new class for styling. * * In the CSS file format, a #GtkEntry defining an "entry" * class, would be matched by: * * * GtkEntry.entry { ... } * * * While any widget defining an "entry" class would be * matched by: * * .entry { ... } * * * Since: 3.0 **/ void gtk_style_context_add_class (GtkStyleContext *context, const gchar *class_name) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; GQuark class_quark; guint position; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (class_name != NULL); priv = context->priv; class_quark = g_quark_from_string (class_name); g_assert (priv->info_stack != NULL); info = priv->info_stack->data; if (!style_class_find (info->style_classes, class_quark, &position)) { g_array_insert_val (info->style_classes, position, class_quark); /* Unset current data, as it likely changed due to the class change */ priv->current_data = NULL; } } /** * gtk_style_context_remove_class: * @context: a #GtkStyleContext * @class_name: class name to remove * * Removes @class_name from @context. * * Since: 3.0 **/ void gtk_style_context_remove_class (GtkStyleContext *context, const gchar *class_name) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; GQuark class_quark; guint position; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (class_name != NULL); class_quark = g_quark_try_string (class_name); if (!class_quark) return; priv = context->priv; g_assert (priv->info_stack != NULL); info = priv->info_stack->data; if (style_class_find (info->style_classes, class_quark, &position)) { g_array_remove_index (info->style_classes, position); /* Unset current data, as it likely changed due to the class change */ priv->current_data = NULL; } } /** * gtk_style_context_has_class: * @context: a #GtkStyleContext * @class_name: a class name * * Returns %TRUE if @context currently has defined the * given class name * * Returns: %TRUE if @context has @class_name defined * * Since: 3.0 **/ gboolean gtk_style_context_has_class (GtkStyleContext *context, const gchar *class_name) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; GQuark class_quark; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE); g_return_val_if_fail (class_name != NULL, FALSE); class_quark = g_quark_try_string (class_name); if (!class_quark) return FALSE; priv = context->priv; g_assert (priv->info_stack != NULL); info = priv->info_stack->data; if (style_class_find (info->style_classes, class_quark, NULL)) return TRUE; return FALSE; } /** * gtk_style_context_list_classes: * @context: a #GtkStyleContext * * Returns the list of classes currently defined in @context. * * Returns: (transfer container) (element-type utf8): a #GList of * strings with the currently defined classes. The contents * of the list are owned by GTK+, but you must free the list * itself with g_list_free() when you are done with it. * * Since: 3.0 **/ GList * gtk_style_context_list_classes (GtkStyleContext *context) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; GList *classes = NULL; guint i; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL); priv = context->priv; g_assert (priv->info_stack != NULL); info = priv->info_stack->data; for (i = 0; i < info->style_classes->len; i++) { GQuark quark; quark = g_array_index (info->style_classes, GQuark, i); classes = g_list_prepend (classes, (gchar *) g_quark_to_string (quark)); } return classes; } /** * gtk_style_context_list_regions: * @context: a #GtkStyleContext * * Returns the list of regions currently defined in @context. * * Returns: (transfer container) (element-type utf8): a #GList of * strings with the currently defined regions. The contents * of the list are owned by GTK+, but you must free the list * itself with g_list_free() when you are done with it. * * Since: 3.0 **/ GList * gtk_style_context_list_regions (GtkStyleContext *context) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; GList *classes = NULL; guint i; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL); priv = context->priv; g_assert (priv->info_stack != NULL); info = priv->info_stack->data; for (i = 0; i < info->regions->len; i++) { GtkRegion *region; const gchar *class_name; region = &g_array_index (info->regions, GtkRegion, i); class_name = g_quark_to_string (region->class_quark); classes = g_list_prepend (classes, (gchar *) class_name); } return classes; } gboolean _gtk_style_context_check_region_name (const gchar *str) { g_return_val_if_fail (str != NULL, FALSE); if (!g_ascii_islower (str[0])) return FALSE; while (*str) { if (*str != '-' && !g_ascii_islower (*str)) return FALSE; str++; } return TRUE; } /** * gtk_style_context_add_region: * @context: a #GtkStyleContext * @region_name: region name to use in styling * @flags: flags that apply to the region * * Adds a region to @context, so posterior calls to * gtk_style_context_get() or any of the gtk_render_*() * functions will make use of this new region for styling. * * In the CSS file format, a #GtkTreeView defining a "row" * region, would be matched by: * * * GtkTreeView row { ... } * * * Pseudo-classes are used for matching @flags, so the two * following rules: * * GtkTreeView row:nth-child(even) { ... } * GtkTreeView row:nth-child(odd) { ... } * * * would apply to even and odd rows, respectively. * * Region names must only contain lowercase letters * and '-', starting always with a lowercase letter. * * Since: 3.0 **/ void gtk_style_context_add_region (GtkStyleContext *context, const gchar *region_name, GtkRegionFlags flags) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; GQuark region_quark; guint position; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (region_name != NULL); g_return_if_fail (_gtk_style_context_check_region_name (region_name)); priv = context->priv; region_quark = g_quark_from_string (region_name); g_assert (priv->info_stack != NULL); info = priv->info_stack->data; if (!region_find (info->regions, region_quark, &position)) { GtkRegion region; region.class_quark = region_quark; region.flags = flags; g_array_insert_val (info->regions, position, region); /* Unset current data, as it likely changed due to the region change */ priv->current_data = NULL; } } /** * gtk_style_context_remove_region: * @context: a #GtkStyleContext * @region_name: region name to unset * * Removes a region from @context. * * Since: 3.0 **/ void gtk_style_context_remove_region (GtkStyleContext *context, const gchar *region_name) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; GQuark region_quark; guint position; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (region_name != NULL); region_quark = g_quark_try_string (region_name); if (!region_quark) return; priv = context->priv; g_assert (priv->info_stack != NULL); info = priv->info_stack->data; if (region_find (info->regions, region_quark, &position)) { g_array_remove_index (info->regions, position); /* Unset current data, as it likely changed due to the region change */ priv->current_data = NULL; } } /** * gtk_style_context_has_region: * @context: a #GtkStyleContext * @region_name: a region name * @flags_return: (out) (allow-none): return location for region flags * * Returns %TRUE if @context has 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_style_context_has_region (GtkStyleContext *context, const gchar *region_name, GtkRegionFlags *flags_return) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; GQuark region_quark; guint position; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE); g_return_val_if_fail (region_name != NULL, FALSE); if (flags_return) *flags_return = 0; region_quark = g_quark_try_string (region_name); if (!region_quark) return FALSE; priv = context->priv; g_assert (priv->info_stack != NULL); info = priv->info_stack->data; if (region_find (info->regions, region_quark, &position)) { if (flags_return) { GtkRegion *region; region = &g_array_index (info->regions, GtkRegion, position); *flags_return = region->flags; } return TRUE; } return FALSE; } static gint style_property_values_cmp (gconstpointer bsearch_node1, gconstpointer bsearch_node2) { const PropertyValue *val1 = bsearch_node1; const PropertyValue *val2 = bsearch_node2; if (val1->widget_type != val2->widget_type) return val1->widget_type < val2->widget_type ? -1 : 1; if (val1->pspec != val2->pspec) return val1->pspec < val2->pspec ? -1 : 1; if (val1->state != val2->state) return val1->state < val2->state ? -1 : 1; return 0; } const GValue * _gtk_style_context_peek_style_property (GtkStyleContext *context, GType widget_type, GtkStateFlags state, GParamSpec *pspec) { GtkStyleContextPrivate *priv; PropertyValue *pcache, key = { 0 }; GList *global_list = NULL; StyleData *data; guint i; priv = context->priv; data = style_data_lookup (context); key.widget_type = widget_type; key.state = state; key.pspec = pspec; /* need value cache array */ if (!data->property_cache) data->property_cache = g_array_new (FALSE, FALSE, sizeof (PropertyValue)); else { pcache = bsearch (&key, data->property_cache->data, data->property_cache->len, sizeof (PropertyValue), style_property_values_cmp); if (pcache) return &pcache->value; } i = 0; while (i < data->property_cache->len && style_property_values_cmp (&key, &g_array_index (data->property_cache, PropertyValue, i)) >= 0) i++; g_array_insert_val (data->property_cache, i, key); pcache = &g_array_index (data->property_cache, PropertyValue, i); /* cache miss, initialize value type, then set contents */ g_param_spec_ref (pcache->pspec); g_value_init (&pcache->value, G_PARAM_SPEC_VALUE_TYPE (pspec)); if (priv->screen) { global_list = g_object_get_qdata (G_OBJECT (priv->screen), provider_list_quark); global_list = g_list_last (global_list); } if (priv->widget_path) { GList *list, *global, *elem; list = priv->providers_last; global = global_list; while ((elem = find_next_candidate (list, global, FALSE)) != NULL) { GtkStyleProviderData *provider_data; provider_data = elem->data; if (elem == list) list = list->prev; else global = global->prev; if (gtk_style_provider_get_style_property (provider_data->provider, priv->widget_path, state, pspec, &pcache->value)) { /* Resolve symbolic colors to GdkColor/GdkRGBA */ if (G_VALUE_TYPE (&pcache->value) == GTK_TYPE_SYMBOLIC_COLOR) { GtkSymbolicColor *color; GdkRGBA rgba; color = g_value_dup_boxed (&pcache->value); g_value_unset (&pcache->value); if (G_PARAM_SPEC_VALUE_TYPE (pspec) == GDK_TYPE_RGBA) g_value_init (&pcache->value, GDK_TYPE_RGBA); else g_value_init (&pcache->value, GDK_TYPE_COLOR); if (gtk_symbolic_color_resolve (color, data->store, &rgba)) { if (G_PARAM_SPEC_VALUE_TYPE (pspec) == GDK_TYPE_RGBA) g_value_set_boxed (&pcache->value, &rgba); else { GdkColor rgb; rgb.red = rgba.red * 65535. + 0.5; rgb.green = rgba.green * 65535. + 0.5; rgb.blue = rgba.blue * 65535. + 0.5; g_value_set_boxed (&pcache->value, &rgb); } } else g_param_value_set_default (pspec, &pcache->value); gtk_symbolic_color_unref (color); } return &pcache->value; } } } /* not supplied by any provider, revert to default */ g_param_value_set_default (pspec, &pcache->value); return &pcache->value; } /** * gtk_style_context_get_style_property: * @context: a #GtkStyleContext * @property_name: the name of the widget style property * @value: Return location for the property value * * Gets the value for a widget style property. * * When @value is no longer needed, g_value_unset() must be called * to free any allocated memory. **/ void gtk_style_context_get_style_property (GtkStyleContext *context, const gchar *property_name, GValue *value) { GtkStyleContextPrivate *priv; GtkWidgetClass *widget_class; GtkStateFlags state; GParamSpec *pspec; const GValue *peek_value; GType widget_type; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (property_name != NULL); g_return_if_fail (value != NULL); priv = context->priv; if (!priv->widget_path) return; widget_type = gtk_widget_path_get_object_type (priv->widget_path); if (!g_type_is_a (widget_type, GTK_TYPE_WIDGET)) { g_warning ("%s: can't get style properties for non-widget class `%s'", G_STRLOC, g_type_name (widget_type)); return; } widget_class = g_type_class_ref (widget_type); pspec = gtk_widget_class_find_style_property (widget_class, property_name); g_type_class_unref (widget_class); if (!pspec) { g_warning ("%s: widget class `%s' has no style property named `%s'", G_STRLOC, g_type_name (widget_type), property_name); return; } state = gtk_style_context_get_state (context); peek_value = _gtk_style_context_peek_style_property (context, widget_type, state, pspec); if (G_VALUE_TYPE (value) == G_VALUE_TYPE (peek_value)) g_value_copy (peek_value, value); else if (g_value_type_transformable (G_VALUE_TYPE (peek_value), G_VALUE_TYPE (value))) g_value_transform (peek_value, value); else g_warning ("can't retrieve style property `%s' of type `%s' as value of type `%s'", pspec->name, G_VALUE_TYPE_NAME (peek_value), G_VALUE_TYPE_NAME (value)); } /** * gtk_style_context_get_style_valist: * @context: a #GtkStyleContext * @args: va_list of property name/return location pairs, followed by %NULL * * Retrieves several widget style properties from @context according to the * current style. * * Since: 3.0 **/ void gtk_style_context_get_style_valist (GtkStyleContext *context, va_list args) { GtkStyleContextPrivate *priv; const gchar *prop_name; GtkStateFlags state; GType widget_type; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); prop_name = va_arg (args, const gchar *); priv = context->priv; if (!priv->widget_path) return; widget_type = gtk_widget_path_get_object_type (priv->widget_path); if (!g_type_is_a (widget_type, GTK_TYPE_WIDGET)) { g_warning ("%s: can't get style properties for non-widget class `%s'", G_STRLOC, g_type_name (widget_type)); return; } state = gtk_style_context_get_state (context); while (prop_name) { GtkWidgetClass *widget_class; GParamSpec *pspec; const GValue *peek_value; gchar *error; widget_class = g_type_class_ref (widget_type); pspec = gtk_widget_class_find_style_property (widget_class, prop_name); g_type_class_unref (widget_class); if (!pspec) { g_warning ("%s: widget class `%s' has no style property named `%s'", G_STRLOC, g_type_name (widget_type), prop_name); continue; } peek_value = _gtk_style_context_peek_style_property (context, widget_type, state, pspec); G_VALUE_LCOPY (peek_value, args, 0, &error); if (error) { g_warning ("can't retrieve style property `%s' of type `%s': %s", pspec->name, G_VALUE_TYPE_NAME (peek_value), error); g_free (error); } prop_name = va_arg (args, const gchar *); } } /** * gtk_style_context_get_style: * @context: a #GtkStyleContext * @...: property name /return value pairs, followed by %NULL * * Retrieves several widget style properties from @context according to the * current style. * * Since: 3.0 **/ void gtk_style_context_get_style (GtkStyleContext *context, ...) { va_list args; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); va_start (args, context); gtk_style_context_get_style_valist (context, args); va_end (args); } /** * gtk_style_context_lookup_icon_set: * @context: a #GtkStyleContext * @stock_id: an icon name * * Looks up @stock_id in the icon factories associated to @context and * the default icon factory, returning an icon set if found, otherwise * %NULL. * * Returns: (transfer none): The looked up %GtkIconSet, or %NULL **/ GtkIconSet * gtk_style_context_lookup_icon_set (GtkStyleContext *context, const gchar *stock_id) { GtkStyleContextPrivate *priv; StyleData *data; GSList *list; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL); g_return_val_if_fail (stock_id != NULL, NULL); priv = context->priv; g_return_val_if_fail (priv->widget_path != NULL, NULL); data = style_data_lookup (context); for (list = data->icon_factories; list; list = list->next) { GtkIconFactory *factory; GtkIconSet *icon_set; factory = list->data; icon_set = gtk_icon_factory_lookup (factory, stock_id); if (icon_set) return icon_set; } return gtk_icon_factory_lookup_default (stock_id); } /** * gtk_style_context_set_screen: * @context: a #GtkStyleContext * @screen: a #GdkScreen * * Attaches @context to the given screen. * * The screen is used to add style information from 'global' style * providers, such as the screens #GtkSettings instance. * * If you are using a #GtkStyleContext returned from * gtk_widget_get_style_context(), you do not need to * call this yourself. * * Since: 3.0 **/ void gtk_style_context_set_screen (GtkStyleContext *context, GdkScreen *screen) { GtkStyleContextPrivate *priv; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (GDK_IS_SCREEN (screen)); priv = context->priv; if (priv->screen == screen) return; priv->screen = screen; g_object_notify (G_OBJECT (context), "screen"); gtk_style_context_invalidate (context); } /** * gtk_style_context_get_screen: * @context: a #GtkStyleContext * * Returns the #GdkScreen to which @context is attached. * * Returns: (transfer none): a #GdkScreen. **/ GdkScreen * gtk_style_context_get_screen (GtkStyleContext *context) { GtkStyleContextPrivate *priv; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL); priv = context->priv; return priv->screen; } /** * gtk_style_context_set_direction: * @context: a #GtkStyleContext * @direction: the new direction. * * Sets the reading direction for rendering purposes. * * If you are using a #GtkStyleContext returned from * gtk_widget_get_style_context(), you do not need to * call this yourself. * * Since: 3.0 **/ void gtk_style_context_set_direction (GtkStyleContext *context, GtkTextDirection direction) { GtkStyleContextPrivate *priv; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; priv->direction = direction; g_object_notify (G_OBJECT (context), "direction"); } /** * gtk_style_context_get_direction: * @context: a #GtkStyleContext * * Returns the widget direction used for rendering. * * Returns: the widget direction * * Since: 3.0 **/ GtkTextDirection gtk_style_context_get_direction (GtkStyleContext *context) { GtkStyleContextPrivate *priv; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), GTK_TEXT_DIR_LTR); priv = context->priv; return priv->direction; } /** * gtk_style_context_set_junction_sides: * @context: a #GtkStyleContext * @sides: sides where rendered elements are visually connected to * other elements * * Sets the sides where rendered elements (mostly through * gtk_render_frame()) will visually connect with other visual elements. * * This is merely a hint that may or may not be honored * by theming engines. * * Container widgets are expected to set junction hints as appropriate * for their children, so it should not normally be necessary to call * this function manually. * * Since: 3.0 **/ void gtk_style_context_set_junction_sides (GtkStyleContext *context, GtkJunctionSides sides) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; info = priv->info_stack->data; info->junction_sides = sides; } /** * gtk_style_context_get_junction_sides: * @context: a #GtkStyleContext * * Returns the sides where rendered elements connect visually with others. * * Returns: the junction sides * * Since: 3.0 **/ GtkJunctionSides gtk_style_context_get_junction_sides (GtkStyleContext *context) { GtkStyleContextPrivate *priv; GtkStyleInfo *info; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0); priv = context->priv; info = priv->info_stack->data; return info->junction_sides; } /** * gtk_style_context_lookup_color: * @context: a #GtkStyleContext * @color_name: color name to lookup * @color: (out): Return location for the looked up color * * Looks up and resolves a color name in the @context color map. * * Returns: %TRUE if @color_name was found and resolved, %FALSE otherwise **/ gboolean gtk_style_context_lookup_color (GtkStyleContext *context, const gchar *color_name, GdkRGBA *color) { GtkStyleContextPrivate *priv; GtkSymbolicColor *sym_color; StyleData *data; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE); g_return_val_if_fail (color_name != NULL, FALSE); g_return_val_if_fail (color != NULL, FALSE); priv = context->priv; g_return_val_if_fail (priv->widget_path != NULL, FALSE); data = style_data_lookup (context); sym_color = gtk_style_properties_lookup_color (data->store, color_name); if (!sym_color) return FALSE; return gtk_symbolic_color_resolve (sym_color, data->store, color); } /** * gtk_style_context_notify_state_change: * @context: a #GtkStyleContext * @window: a #GdkWindow * @region_id: (allow-none): animatable region to notify on, or %NULL. * See gtk_style_context_push_animatable_region() * @state: state to trigger transition for * @state_value: %TRUE if @state is the state we are changing to, * %FALSE if we are changing away from it * * Notifies a state change on @context, so if the current style makes use * of transition animations, one will be started so all rendered elements * under @region_id are animated for state @state being set to value * @state_value. * * The @window parameter is used in order to invalidate the rendered area * as the animation runs, so make sure it is the same window that is being * rendered on by the gtk_render_*() functions. * * If @region_id is %NULL, all rendered elements using @context will be * affected by this state transition. * * As a practical example, a #GtkButton notifying a state transition on * the prelight state: * * gtk_style_context_notify_state_change (context, * gtk_widget_get_window (widget), * NULL, * GTK_STATE_PRELIGHT, * button->in_button); * * * Can be handled in the CSS file like this: * * GtkButton { * background-color: #f00 * } * * GtkButton:hover { * background-color: #fff; * transition: 200ms linear * } * * * This combination will animate the button background from red to white * if a pointer enters the button, and back to red if the pointer leaves * the button. * * Note that @state is used when finding the transition parameters, which * is why the style places the transition under the :hover pseudo-class. * * Since: 3.0 **/ void gtk_style_context_notify_state_change (GtkStyleContext *context, GdkWindow *window, gpointer region_id, GtkStateType state, gboolean state_value) { GtkStyleContextPrivate *priv; GtkAnimationDescription *desc; AnimationInfo *info; GtkStateFlags flags; StyleData *data; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (GDK_IS_WINDOW (window)); g_return_if_fail (state > GTK_STATE_NORMAL && state <= GTK_STATE_FOCUSED); priv = context->priv; g_return_if_fail (priv->widget_path != NULL); state_value = (state_value == TRUE); switch (state) { case GTK_STATE_ACTIVE: flags = GTK_STATE_FLAG_ACTIVE; break; case GTK_STATE_PRELIGHT: flags = GTK_STATE_FLAG_PRELIGHT; break; case GTK_STATE_SELECTED: flags = GTK_STATE_FLAG_SELECTED; break; case GTK_STATE_INSENSITIVE: flags = GTK_STATE_FLAG_INSENSITIVE; break; case GTK_STATE_INCONSISTENT: flags = GTK_STATE_FLAG_INCONSISTENT; break; case GTK_STATE_FOCUSED: flags = GTK_STATE_FLAG_FOCUSED; break; case GTK_STATE_NORMAL: default: flags = 0; break; } /* Find out if there is any animation description for the given * state, it will fallback to the normal state as well if necessary. */ data = style_data_lookup (context); gtk_style_properties_get (data->store, flags, "transition", &desc, NULL); if (!desc) return; if (_gtk_animation_description_get_duration (desc) == 0) { _gtk_animation_description_unref (desc); return; } info = animation_info_lookup (context, region_id, state); if (info && info->target_value != state_value) { /* Target values are the opposite */ if (!_gtk_timeline_get_loop (info->timeline)) { /* Reverse the animation */ if (_gtk_timeline_get_direction (info->timeline) == GTK_TIMELINE_DIRECTION_FORWARD) _gtk_timeline_set_direction (info->timeline, GTK_TIMELINE_DIRECTION_BACKWARD); else _gtk_timeline_set_direction (info->timeline, GTK_TIMELINE_DIRECTION_FORWARD); info->target_value = state_value; } else { /* Take it out of its looping state */ _gtk_timeline_set_loop (info->timeline, FALSE); } } else if (!info && (!_gtk_animation_description_get_loop (desc) || state_value)) { info = animation_info_new (context, region_id, _gtk_animation_description_get_duration (desc), _gtk_animation_description_get_progress_type (desc), _gtk_animation_description_get_loop (desc), state, state_value, window); priv->animations = g_slist_prepend (priv->animations, info); priv->animations_invalidated = TRUE; } _gtk_animation_description_unref (desc); } /** * gtk_style_context_cancel_animations: * @context: a #GtkStyleContext * @region_id: (allow-none): animatable region to stop, or %NULL. * See gtk_style_context_push_animatable_region() * * Stops all running animations for @region_id and all animatable * regions underneath. * * A %NULL @region_id will stop all ongoing animations in @context, * when dealing with a #GtkStyleContext obtained through * gtk_widget_get_style_context(), this is normally done for you * in all circumstances you would expect all widget to be stopped, * so this should be only used in complex widgets with different * animatable regions. * * Since: 3.0 **/ void gtk_style_context_cancel_animations (GtkStyleContext *context, gpointer region_id) { GtkStyleContextPrivate *priv; AnimationInfo *info; GSList *l; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; l = priv->animations; while (l) { info = l->data; l = l->next; if (!region_id || info->region_id == region_id || g_slist_find (info->parent_regions, region_id)) { priv->animations = g_slist_remove (priv->animations, info); animation_info_free (info); } } } static gboolean is_parent_of (GdkWindow *parent, GdkWindow *child) { GtkWidget *child_widget, *parent_widget; GdkWindow *window; gdk_window_get_user_data (child, (gpointer *) &child_widget); gdk_window_get_user_data (parent, (gpointer *) &parent_widget); if (child_widget != parent_widget && !gtk_widget_is_ancestor (child_widget, parent_widget)) return FALSE; window = child; while (window) { if (window == parent) return TRUE; window = gdk_window_get_parent (window); } return FALSE; } /** * gtk_style_context_scroll_animations: * @context: a #GtkStyleContext * @window: a #GdkWindow used previously in * gtk_style_context_notify_state_change() * @dx: Amount to scroll in the X axis * @dy: Amount to scroll in the Y axis * * This function is analogous to gdk_window_scroll(), and * should be called together with it so the invalidation * areas for any ongoing animation are scrolled together * with it. * * Since: 3.0 **/ void gtk_style_context_scroll_animations (GtkStyleContext *context, GdkWindow *window, gint dx, gint dy) { GtkStyleContextPrivate *priv; AnimationInfo *info; GSList *l; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (GDK_IS_WINDOW (window)); priv = context->priv; l = priv->animations; while (l) { info = l->data; l = l->next; if (info->invalidation_region && (window == info->window || is_parent_of (window, info->window))) cairo_region_translate (info->invalidation_region, dx, dy); } } /** * gtk_style_context_push_animatable_region: * @context: a #GtkStyleContext * @region_id: unique identifier for the animatable region * * Pushes an animatable region, so all further gtk_render_*() calls between * this call and the following gtk_style_context_pop_animatable_region() * will potentially show transition animations for this region if * gtk_style_context_notify_state_change() is called for a given state, * and the current theme/style defines transition animations for state * changes. * * The @region_id used must be unique in @context so the theming engine * can uniquely identify rendered elements subject to a state transition. * * Since: 3.0 **/ void gtk_style_context_push_animatable_region (GtkStyleContext *context, gpointer region_id) { GtkStyleContextPrivate *priv; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (region_id != NULL); priv = context->priv; priv->animation_regions = g_slist_prepend (priv->animation_regions, region_id); } /** * gtk_style_context_pop_animatable_region: * @context: a #GtkStyleContext * * Pops an animatable region from @context. * See gtk_style_context_push_animatable_region(). * * Since: 3.0 **/ void gtk_style_context_pop_animatable_region (GtkStyleContext *context) { GtkStyleContextPrivate *priv; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; priv->animation_regions = g_slist_delete_link (priv->animation_regions, priv->animation_regions); } void _gtk_style_context_invalidate_animation_areas (GtkStyleContext *context) { GtkStyleContextPrivate *priv; GSList *l; priv = context->priv; for (l = priv->animations; l; l = l->next) { AnimationInfo *info; info = l->data; /* A NULL invalidation region means it has to be recreated on * the next expose event, this happens usually after a widget * allocation change, so the next expose after it will update * the invalidation region. */ if (info->invalidation_region) { cairo_region_destroy (info->invalidation_region); info->invalidation_region = NULL; } } priv->animations_invalidated = TRUE; } void _gtk_style_context_coalesce_animation_areas (GtkStyleContext *context, GtkWidget *widget) { GtkStyleContextPrivate *priv; GSList *l; priv = context->priv; if (!priv->animations_invalidated) return; l = priv->animations; while (l) { AnimationInfo *info; gint rel_x, rel_y; GSList *cur; guint i; cur = l; info = cur->data; l = l->next; if (info->invalidation_region) continue; if (info->rectangles->len == 0) continue; info->invalidation_region = cairo_region_create (); _gtk_widget_get_translation_to_window (widget, info->window, &rel_x, &rel_y); for (i = 0; i < info->rectangles->len; i++) { cairo_rectangle_int_t *rect; rect = &g_array_index (info->rectangles, cairo_rectangle_int_t, i); /* These are widget relative coordinates, * so have them inverted to be window relative */ rect->x -= rel_x; rect->y -= rel_y; cairo_region_union_rectangle (info->invalidation_region, rect); } g_array_remove_range (info->rectangles, 0, info->rectangles->len); } priv->animations_invalidated = FALSE; } static void store_animation_region (GtkStyleContext *context, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStyleContextPrivate *priv; GSList *l; priv = context->priv; if (!priv->animations_invalidated) return; for (l = priv->animations; l; l = l->next) { AnimationInfo *info; info = l->data; /* The animation doesn't need updating * the invalidation area, bail out. */ if (info->invalidation_region) continue; if (context_has_animatable_region (context, info->region_id)) { cairo_rectangle_int_t rect; rect.x = (gint) x; rect.y = (gint) y; rect.width = (gint) width; rect.height = (gint) height; g_array_append_val (info->rectangles, rect); if (!info->parent_regions) { GSList *parent_regions; parent_regions = g_slist_find (priv->animation_regions, info->region_id); info->parent_regions = g_slist_copy (parent_regions); } } } } /** * gtk_style_context_invalidate: * @context: a #GtkStyleContext. * * Invalidates @context style information, so it will be reconstructed * again. * * If you're using a #GtkStyleContext returned from * gtk_widget_get_style_context(), you do not need to * call this yourself. * * Since: 3.0 **/ void gtk_style_context_invalidate (GtkStyleContext *context) { GtkStyleContextPrivate *priv; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; /* Avoid reentrancy */ if (priv->invalidating_context) return; priv->invalidating_context = TRUE; g_hash_table_remove_all (priv->style_data); priv->current_data = NULL; g_signal_emit (context, signals[CHANGED], 0); priv->invalidating_context = FALSE; } /** * gtk_style_context_set_background: * @context: a #GtkStyleContext * @window: a #GdkWindow * * Sets the background of @window to the background pattern or * color specified in @context for its current state. * * Since: 3.0 **/ void gtk_style_context_set_background (GtkStyleContext *context, GdkWindow *window) { GtkStateFlags state; cairo_pattern_t *pattern; GdkRGBA *color; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (GDK_IS_WINDOW (window)); state = gtk_style_context_get_state (context); gtk_style_context_get (context, state, "background-image", &pattern, NULL); if (pattern) { gdk_window_set_background_pattern (window, pattern); cairo_pattern_destroy (pattern); return; } gtk_style_context_get (context, state, "background-color", &color, NULL); if (color) { gdk_window_set_background_rgba (window, color); gdk_rgba_free (color); } } /** * gtk_style_context_get_color: * @context: a #GtkStyleContext * @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_style_context_get_color (GtkStyleContext *context, GtkStateFlags state, GdkRGBA *color) { GdkRGBA *c; g_return_if_fail (color != NULL); g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); gtk_style_context_get (context, state, "color", &c, NULL); *color = *c; gdk_rgba_free (c); } /** * gtk_style_context_get_background_color: * @context: a #GtkStyleContext * @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_style_context_get_background_color (GtkStyleContext *context, GtkStateFlags state, GdkRGBA *color) { GdkRGBA *c; g_return_if_fail (color != NULL); g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); gtk_style_context_get (context, state, "background-color", &c, NULL); *color = *c; gdk_rgba_free (c); } /** * gtk_style_context_get_border_color: * @context: a #GtkStyleContext * @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_style_context_get_border_color (GtkStyleContext *context, GtkStateFlags state, GdkRGBA *color) { GdkRGBA *c; g_return_if_fail (color != NULL); g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); gtk_style_context_get (context, state, "border-color", &c, NULL); *color = *c; gdk_rgba_free (c); } /** * gtk_style_context_get_border: * @context: a #GtkStyleContext * @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. * See %GTK_STYLE_PROPERTY_BORDER_WIDTH. * * Since: 3.0 **/ void gtk_style_context_get_border (GtkStyleContext *context, GtkStateFlags state, GtkBorder *border) { GtkStyleContextPrivate *priv; StyleData *data; int top, left, bottom, right; g_return_if_fail (border != NULL); g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; g_return_if_fail (priv->widget_path != NULL); data = style_data_lookup (context); gtk_style_properties_get (data->store, state, "border-top-width", &top, "border-left-width", &left, "border-bottom-width", &bottom, "border-right-width", &right, NULL); border->top = top; border->left = left; border->bottom = bottom; border->right = right; } /** * gtk_style_context_get_padding: * @context: a #GtkStyleContext * @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. * See %GTK_STYLE_PROPERTY_PADDING. * * Since: 3.0 **/ void gtk_style_context_get_padding (GtkStyleContext *context, GtkStateFlags state, GtkBorder *padding) { GtkStyleContextPrivate *priv; StyleData *data; int top, left, bottom, right; g_return_if_fail (padding != NULL); g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; g_return_if_fail (priv->widget_path != NULL); data = style_data_lookup (context); gtk_style_properties_get (data->store, state, "padding-top", &top, "padding-left", &left, "padding-bottom", &bottom, "padding-right", &right, NULL); padding->top = top; padding->left = left; padding->bottom = bottom; padding->right = right; } /** * gtk_style_context_get_margin: * @context: a #GtkStyleContext * @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. * See %GTK_STYLE_PROPERTY_MARGIN. * * Since: 3.0 **/ void gtk_style_context_get_margin (GtkStyleContext *context, GtkStateFlags state, GtkBorder *margin) { GtkStyleContextPrivate *priv; StyleData *data; int top, left, bottom, right; g_return_if_fail (margin != NULL); g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); priv = context->priv; g_return_if_fail (priv->widget_path != NULL); data = style_data_lookup (context); gtk_style_properties_get (data->store, state, "margin-top", &top, "margin-left", &left, "margin-bottom", &bottom, "margin-right", &right, NULL); margin->top = top; margin->left = left; margin->bottom = bottom; margin->right = right; } /** * gtk_style_context_get_font: * @context: a #GtkStyleContext * @state: state to retrieve the font for * * Returns the font description for a given state. The returned * object is const and will remain valid until the * #GtkStyleContext::changed signal happens. * * 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_style_context_get_font (GtkStyleContext *context, GtkStateFlags state) { GtkStyleContextPrivate *priv; StyleData *data; GHashTable *font_cache; PangoFontDescription *description; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL); priv = context->priv; g_return_val_if_fail (priv->widget_path != NULL, NULL); data = style_data_lookup (context); /* Yuck, fonts are created on-demand but we don't return a ref. * Do bad things to achieve this requirement */ font_cache = g_object_get_data (G_OBJECT (data->store), "font-cache-for-get_font"); if (font_cache) { description = g_hash_table_lookup (font_cache, GUINT_TO_POINTER (state)); } else { font_cache = g_hash_table_new_full (NULL, NULL, NULL, (GDestroyNotify) pango_font_description_free); g_object_set_data_full (G_OBJECT (data->store), "font-cache-for-get_font", font_cache, (GDestroyNotify) g_hash_table_unref); description = NULL; } if (description == NULL) { gtk_style_properties_get (data->store, state, "font", &description, NULL); g_hash_table_insert (font_cache, GUINT_TO_POINTER (state), description); } return description; } static void get_cursor_color (GtkStyleContext *context, gboolean primary, GdkRGBA *color) { GdkColor *style_color; gtk_style_context_get_style (context, primary ? "cursor-color" : "secondary-cursor-color", &style_color, NULL); if (style_color) { color->red = style_color->red / 65535.0; color->green = style_color->green / 65535.0; color->blue = style_color->blue / 65535.0; color->alpha = 1; gdk_color_free (style_color); } else { gtk_style_context_get_color (context, GTK_STATE_FLAG_NORMAL, color); if (!primary) { GdkRGBA bg; gtk_style_context_get_background_color (context, GTK_STATE_FLAG_NORMAL, &bg); color->red = (color->red + bg.red) * 0.5; color->green = (color->green + bg.green) * 0.5; color->blue = (color->blue + bg.blue) * 0.5; } } } void _gtk_style_context_get_cursor_color (GtkStyleContext *context, GdkRGBA *primary_color, GdkRGBA *secondary_color) { if (primary_color) get_cursor_color (context, TRUE, primary_color); if (secondary_color) get_cursor_color (context, FALSE, secondary_color); } /* Paint methods */ /** * gtk_render_check: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders a checkmark (as in a #GtkCheckButton). * * The %GTK_STATE_FLAG_ACTIVE state determines whether the check is * on or off, and %GTK_STATE_FLAG_INCONSISTENT determines whether it * should be marked as undefined. * * * Typical checkmark rendering * * * * Since: 3.0 **/ void gtk_render_check (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, width, height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_check (priv->theming_engine, cr, x, y, width, height); cairo_restore (cr); } /** * gtk_render_option: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders an option mark (as in a #GtkRadioButton), the %GTK_STATE_FLAG_ACTIVE * state will determine whether the option is on or off, and * %GTK_STATE_FLAG_INCONSISTENT whether it should be marked as undefined. * * * Typical option mark rendering * * * * Since: 3.0 **/ void gtk_render_option (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, width, height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_option (priv->theming_engine, cr, x, y, width, height); cairo_restore (cr); } /** * gtk_render_arrow: * @context: a #GtkStyleContext * @cr: a #cairo_t * @angle: arrow angle from 0 to 2 * %G_PI, being 0 the arrow pointing to the north * @x: Center X for the render area * @y: Center Y for the render area * @size: square side for render area * * Renders an arrow pointing to @angle. * * * Typical arrow rendering at 0, 1&solidus;2 π, π and 3&solidus;2 π * * * * Since: 3.0 **/ void gtk_render_arrow (GtkStyleContext *context, cairo_t *cr, gdouble angle, gdouble x, gdouble y, gdouble size) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (size <= 0) return; priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, size, size); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_arrow (priv->theming_engine, cr, angle, x, y, size); cairo_restore (cr); } /** * gtk_render_background: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders the background of an element. * * * Typical background rendering, showing the effect of * <parameter>background-image</parameter>, * <parameter>border-width</parameter> and * <parameter>border-radius</parameter> * * * * Since: 3.0. **/ void gtk_render_background (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, width, height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_background (priv->theming_engine, cr, x, y, width, height); cairo_restore (cr); } /** * gtk_render_frame: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders a frame around the rectangle defined by @x, @y, @width, @height. * * * Examples of frame rendering, showing the effect of * <parameter>border-image</parameter>, * <parameter>border-color</parameter>, * <parameter>border-width</parameter>, * <parameter>border-radius</parameter> and * junctions * * * * Since: 3.0 **/ void gtk_render_frame (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, width, height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_frame (priv->theming_engine, cr, x, y, width, height); cairo_restore (cr); } /** * gtk_render_expander: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders an expander (as used in #GtkTreeView and #GtkExpander) in the area * defined by @x, @y, @width, @height. The state %GTK_STATE_FLAG_ACTIVE * determines whether the expander is collapsed or expanded. * * * Typical expander rendering * * * * Since: 3.0 **/ void gtk_render_expander (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, width, height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_expander (priv->theming_engine, cr, x, y, width, height); cairo_restore (cr); } /** * gtk_render_focus: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders a focus indicator on the rectangle determined by @x, @y, @width, @height. * * Typical focus rendering * * * * Since: 3.0 **/ void gtk_render_focus (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, width, height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_focus (priv->theming_engine, cr, x, y, width, height); cairo_restore (cr); } /** * gtk_render_layout: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin * @y: Y origin * @layout: the #PangoLayout to render * * Renders @layout on the coordinates @x, @y * * Since: 3.0 **/ void gtk_render_layout (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, PangoLayout *layout) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; PangoRectangle extents; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (PANGO_IS_LAYOUT (layout)); g_return_if_fail (cr != NULL); priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); pango_layout_get_extents (layout, &extents, NULL); store_animation_region (context, x + extents.x, y + extents.y, extents.width, extents.height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_layout (priv->theming_engine, cr, x, y, layout); cairo_restore (cr); } /** * gtk_render_line: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x0: X coordinate for the origin of the line * @y0: Y coordinate for the origin of the line * @x1: X coordinate for the end of the line * @y1: Y coordinate for the end of the line * * Renders a line from (x0, y0) to (x1, y1). * * Since: 3.0 **/ void gtk_render_line (GtkStyleContext *context, cairo_t *cr, gdouble x0, gdouble y0, gdouble x1, gdouble y1) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_line (priv->theming_engine, cr, x0, y0, x1, y1); cairo_restore (cr); } /** * gtk_render_slider: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * @orientation: orientation of the slider * * Renders a slider (as in #GtkScale) in the rectangle defined by @x, @y, * @width, @height. @orientation defines whether the slider is vertical * or horizontal. * * * Typical slider rendering * * * * Since: 3.0 **/ void gtk_render_slider (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkOrientation orientation) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, width, height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_slider (priv->theming_engine, cr, x, y, width, height, orientation); cairo_restore (cr); } /** * gtk_render_frame_gap: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * @gap_side: side where the gap is * @xy0_gap: initial coordinate (X or Y depending on @gap_side) for the gap * @xy1_gap: end coordinate (X or Y depending on @gap_side) for the gap * * Renders a frame around the rectangle defined by (@x, @y, @width, @height), * leaving a gap on one side. @xy0_gap and @xy1_gap will mean X coordinates * for %GTK_POS_TOP and %GTK_POS_BOTTOM gap sides, and Y coordinates for * %GTK_POS_LEFT and %GTK_POS_RIGHT. * * * Typical rendering of a frame with a gap * * * * Since: 3.0 **/ void gtk_render_frame_gap (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkPositionType gap_side, gdouble xy0_gap, gdouble xy1_gap) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); g_return_if_fail (xy0_gap <= xy1_gap); g_return_if_fail (xy0_gap >= 0); if (width <= 0 || height <= 0) return; if (gap_side == GTK_POS_LEFT || gap_side == GTK_POS_RIGHT) g_return_if_fail (xy1_gap <= height); else g_return_if_fail (xy1_gap <= width); priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, width, height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_frame_gap (priv->theming_engine, cr, x, y, width, height, gap_side, xy0_gap, xy1_gap); cairo_restore (cr); } /** * gtk_render_extension: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * @gap_side: side where the gap is * * Renders a extension (as in a #GtkNotebook tab) in the rectangle * defined by @x, @y, @width, @height. The side where the extension * connects to is defined by @gap_side. * * * Typical extension rendering * * * * Since: 3.0 **/ void gtk_render_extension (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height, GtkPositionType gap_side) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, width, height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_extension (priv->theming_engine, cr, x, y, width, height, gap_side); cairo_restore (cr); } /** * gtk_render_handle: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders a handle (as in #GtkHandleBox, #GtkPaned and * #GtkWindow's resize grip), in the rectangle * determined by @x, @y, @width, @height. * * * Handles rendered for the paned and grip classes * * * * Since: 3.0 **/ void gtk_render_handle (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, width, height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_handle (priv->theming_engine, cr, x, y, width, height); cairo_restore (cr); } /** * gtk_render_activity: * @context: a #GtkStyleContext * @cr: a #cairo_t * @x: X origin of the rectangle * @y: Y origin of the rectangle * @width: rectangle width * @height: rectangle height * * Renders an activity area (Such as in #GtkSpinner or the * fill line in #GtkRange), the state %GTK_STATE_FLAG_ACTIVE * determines whether there is activity going on. * * Since: 3.0 **/ void gtk_render_activity (GtkStyleContext *context, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); if (width <= 0 || height <= 0) return; priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, width, height); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_activity (priv->theming_engine, cr, x, y, width, height); cairo_restore (cr); } /** * gtk_render_icon_pixbuf: * @context: a #GtkStyleContext * @source: the #GtkIconSource specifying the icon to render * @size: (type int): the size to render the icon at. A size of (GtkIconSize) -1 * means render at the size of the source and don't scale. * * Renders the icon specified by @source at the given @size, returning the result * in a pixbuf. * * Returns: (transfer full): a newly-created #GdkPixbuf containing the rendered icon * * Since: 3.0 **/ GdkPixbuf * gtk_render_icon_pixbuf (GtkStyleContext *context, const GtkIconSource *source, GtkIconSize size) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL); g_return_val_if_fail (size > GTK_ICON_SIZE_INVALID || size == -1, NULL); g_return_val_if_fail (source != NULL, NULL); priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); _gtk_theming_engine_set_context (priv->theming_engine, context); return engine_class->render_icon_pixbuf (priv->theming_engine, source, size); } /** * gtk_render_icon: * @context: a #GtkStyleContext * @cr: a #cairo_t * @pixbuf: a #GdkPixbuf containing the icon to draw * @x: X position for the @pixbuf * @y: Y position for the @pixbuf * * Renders the icon in @pixbuf at the specified @x and @y coordinates. * * Since: 3.2 **/ void gtk_render_icon (GtkStyleContext *context, cairo_t *cr, GdkPixbuf *pixbuf, gdouble x, gdouble y) { GtkStyleContextPrivate *priv; GtkThemingEngineClass *engine_class; g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); g_return_if_fail (cr != NULL); priv = context->priv; engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine); cairo_save (cr); store_animation_region (context, x, y, gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf)); _gtk_theming_engine_set_context (priv->theming_engine, context); engine_class->render_icon (priv->theming_engine, cr, pixbuf, x, y); cairo_restore (cr); } static AtkAttributeSet * add_attribute (AtkAttributeSet *attributes, AtkTextAttribute attr, const gchar *value) { AtkAttribute *at; at = g_new (AtkAttribute, 1); at->name = g_strdup (atk_text_attribute_get_name (attr)); at->value = g_strdup (value); return g_slist_prepend (attributes, at); } /* * _gtk_style_context_get_attributes: * @attributes: a #AtkAttributeSet to add attributes to * @context: the #GtkStyleContext to get attributes from * @flags: the state to use with @context * * Adds the foreground and background color from @context to * @attributes, after translating them to ATK attributes. * * This is a convenience function that can be used in * implementing the #AtkText interface in widgets. * * Returns: the modified #AtkAttributeSet */ AtkAttributeSet * _gtk_style_context_get_attributes (AtkAttributeSet *attributes, GtkStyleContext *context, GtkStateFlags flags) { GdkRGBA color; gchar *value; gtk_style_context_get_background_color (context, flags, &color); value = g_strdup_printf ("%u,%u,%u", (guint) ceil (color.red * 65536 - color.red), (guint) ceil (color.green * 65536 - color.green), (guint) ceil (color.blue * 65536 - color.blue)); attributes = add_attribute (attributes, ATK_TEXT_ATTR_BG_COLOR, value); g_free (value); gtk_style_context_get_color (context, flags, &color); value = g_strdup_printf ("%u,%u,%u", (guint) ceil (color.red * 65536 - color.red), (guint) ceil (color.green * 65536 - color.green), (guint) ceil (color.blue * 65536 - color.blue)); attributes = add_attribute (attributes, ATK_TEXT_ATTR_FG_COLOR, value); g_free (value); return attributes; }