forked from AuroraMiddleware/gtk
4775 lines
132 KiB
C
4775 lines
132 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gdk/gdk.h>
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#include <math.h>
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#include <stdlib.h>
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#include <gobject/gvaluecollector.h>
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#include "gtkstylecontextprivate.h"
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#include "gtkcontainerprivate.h"
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#include "gtkcsscolorvalueprivate.h"
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#include "gtkcsscornervalueprivate.h"
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#include "gtkcssenginevalueprivate.h"
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#include "gtkcssnumbervalueprivate.h"
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#include "gtkcssrgbavalueprivate.h"
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#include "gtkdebug.h"
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#include "gtkstylepropertiesprivate.h"
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#include "gtktypebuiltins.h"
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#include "gtkthemingengineprivate.h"
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#include "gtkintl.h"
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#include "gtkwidget.h"
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#include "gtkwindow.h"
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#include "gtkprivate.h"
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#include "gtkwidgetpath.h"
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#include "gtkwidgetprivate.h"
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#include "gtkstylecascadeprivate.h"
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#include "gtkstyleproviderprivate.h"
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#include "gtksettings.h"
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#include "gtksettingsprivate.h"
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#include "deprecated/gtkgradientprivate.h"
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#include "deprecated/gtksymboliccolorprivate.h"
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/**
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* SECTION:gtkstylecontext
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* @Short_description: Rendering UI elements
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* @Title: GtkStyleContext
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*
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* #GtkStyleContext is an object that stores styling information affecting
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* a widget defined by #GtkWidgetPath.
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*
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* In order to construct the final style information, #GtkStyleContext
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* queries information from all attached #GtkStyleProviders. Style providers
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* can be either attached explicitly to the context through
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* gtk_style_context_add_provider(), or to the screen through
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* gtk_style_context_add_provider_for_screen(). The resulting style is a
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* combination of all providers’ information in priority order.
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*
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* For GTK+ widgets, any #GtkStyleContext returned by
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* gtk_widget_get_style_context() will already have a #GtkWidgetPath, a
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* #GdkScreen and RTL/LTR information set. The style context will be also
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* updated automatically if any of these settings change on the widget.
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*
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* If you are using the theming layer standalone, you will need to set a
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* widget path and a screen yourself to the created style context through
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* gtk_style_context_set_path() and gtk_style_context_set_screen(), as well
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* as updating the context yourself using gtk_style_context_invalidate()
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* whenever any of the conditions change, such as a change in the
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* #GtkSettings:gtk-theme-name setting or a hierarchy change in the rendered
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* widget.
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*
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* # Transition Animations
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*
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* #GtkStyleContext has built-in support for state change transitions.
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* Note that these animations respect the #GtkSettings:gtk-enable-animations
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* setting.
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*
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* For simple widgets where state changes affect the whole widget area,
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* calling gtk_style_context_notify_state_change() with a %NULL region
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* is sufficient to trigger the transition animation. And GTK+ already
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* does that when gtk_widget_set_state() or gtk_widget_set_state_flags()
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* are called.
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*
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* If a widget needs to declare several animatable regions (i.e. not
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* affecting the whole widget area), its #GtkWidget::draw signal handler
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* needs to wrap the render operations for the different regions with
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* calls to gtk_style_context_push_animatable_region() and
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* gtk_style_context_pop_animatable_region(). These functions take an
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* identifier for the region which must be unique within the style context.
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* For simple widgets with a fixed set of animatable regions, using an
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* enumeration works well:
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*
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* An example for Using an enumeration to identify animatable regions:
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*
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* |[<!-- language="C" -->
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* enum {
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* REGION_ENTRY,
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* REGION_BUTTON_UP,
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* REGION_BUTTON_DOWN
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* };
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*
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* ...
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*
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* gboolean
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* spin_button_draw (GtkWidget *widget,
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* cairo_t *cr)
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* {
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* GtkStyleContext *context;
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*
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* context = gtk_widget_get_style_context (widget);
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*
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* gtk_style_context_push_animatable_region (context,
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* GUINT_TO_POINTER (REGION_ENTRY));
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*
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* gtk_render_background (cr, 0, 0, 100, 30);
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* gtk_render_frame (cr, 0, 0, 100, 30);
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*
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* gtk_style_context_pop_animatable_region (context);
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*
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* ...
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* }
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* ]|
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*
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* For complex widgets with an arbitrary number of animatable regions, it
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* is up to the implementation to come up with a way to uniquely identify
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* each animatable region. Using pointers to internal structs is one way
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* to achieve this:
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*
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* An example for using struct pointers to identify animatable regions:
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* |[<!-- language="C" -->
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* void
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* notebook_draw_tab (GtkWidget *widget,
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* NotebookPage *page,
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* cairo_t *cr)
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* {
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* gtk_style_context_push_animatable_region (context, page);
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* gtk_render_extension (cr, page->x, page->y, page->width, page->height);
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* gtk_style_context_pop_animatable_region (context);
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* }
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* ]|
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*
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* The widget also needs to notify the style context about a state change
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* for a given animatable region so the animation is triggered.
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*
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* An example for triggering a state change animation on a region:
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* |[<!-- language="C" -->
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* gboolean
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* notebook_motion_notify (GtkWidget *widget,
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* GdkEventMotion *event)
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* {
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* GtkStyleContext *context;
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* NotebookPage *page;
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*
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* context = gtk_widget_get_style_context (widget);
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* page = find_page_under_pointer (widget, event);
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* gtk_style_context_notify_state_change (context,
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* gtk_widget_get_window (widget),
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* page,
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* GTK_STATE_PRELIGHT,
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* TRUE);
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* ...
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* }
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* ]|
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*
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* gtk_style_context_notify_state_change() accepts %NULL region IDs as a
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* special value, in this case, the whole widget area will be updated
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* by the animation.
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*
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* # Style Classes and Regions # {#gtkstylecontext-classes}
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*
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* Widgets can add style classes to their context, which can be used
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* to associate different styles by class
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* (see [Selectors][gtkcssprovider-selectors]).
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* Theme engines can also use style classes to vary their rendering.
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*
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* Widgets can also add regions with flags to their context.
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* The regions used by GTK+ widgets are:
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* <informaltable>
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* <tgroup cols="4">
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* <thead>
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* <row>
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* <entry>Region</entry>
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* <entry>Flags</entry>
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* <entry>Macro</entry>
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* <entry>Used by</entry>
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* </row>
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* </thead>
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* <tbody>
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* <row>
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* <entry>row</entry>
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* <entry>even, odd</entry>
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* <entry>GTK_STYLE_REGION_ROW</entry>
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* <entry>#GtkTreeView</entry>
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* </row>
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* <row>
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* <entry>column</entry>
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* <entry>first, last, sorted</entry>
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* <entry>GTK_STYLE_REGION_COLUMN</entry>
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* <entry>#GtkTreeView</entry>
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* </row>
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* <row>
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* <entry>column-header</entry>
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* <entry></entry>
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* <entry>GTK_STYLE_REGION_COLUMN_HEADER</entry>
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* <entry></entry>
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* </row>
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* <row>
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* <entry>tab</entry>
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* <entry>even, odd, first, last</entry>
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* <entry>GTK_STYLE_REGION_TAB</entry>
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* <entry>#GtkNotebook</entry>
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* </row>
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* </tbody>
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* </tgroup>
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* </informaltable>
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*
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* # Custom styling in UI libraries and applications
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*
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* If you are developing a library with custom #GtkWidget<!-- -->s that
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* render differently than standard components, you may need to add a
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* #GtkStyleProvider yourself with the %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK
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* priority, either a #GtkCssProvider or a custom object implementing the
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* #GtkStyleProvider interface. This way theming engines may still attempt
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* to style your UI elements in a different way if needed so.
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*
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* If you are using custom styling on an applications, you probably want then
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* to make your style information prevail to the theme’s, so you must use
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* a #GtkStyleProvider with the %GTK_STYLE_PROVIDER_PRIORITY_APPLICATION
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* priority, keep in mind that the user settings in
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* `XDG_CONFIG_HOME/gtk-3.0/gtk.css` will
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* still take precedence over your changes, as it uses the
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* %GTK_STYLE_PROVIDER_PRIORITY_USER priority.
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*
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* If a custom theming engine is needed, you probably want to implement a
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* #GtkStyleProvider yourself so it points to your #GtkThemingEngine
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* implementation, as #GtkCssProvider uses gtk_theming_engine_load()
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* which loads the theming engine module from the standard paths.
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*/
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/* When these change we do a full restyling. Otherwise we try to figure out
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* if we need to change things. */
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#define GTK_STYLE_CONTEXT_RADICAL_CHANGE (GTK_CSS_CHANGE_NAME | GTK_CSS_CHANGE_CLASS | GTK_CSS_CHANGE_SOURCE)
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/* When these change we don’t clear the cache. This takes more memory but makes
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* things go faster. */
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#define GTK_STYLE_CONTEXT_CACHED_CHANGE (GTK_CSS_CHANGE_STATE)
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typedef struct GtkStyleInfo GtkStyleInfo;
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typedef struct GtkRegion GtkRegion;
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typedef struct PropertyValue PropertyValue;
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typedef struct StyleData StyleData;
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struct GtkRegion
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{
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GQuark class_quark;
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GtkRegionFlags flags;
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};
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struct PropertyValue
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{
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GType widget_type;
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GParamSpec *pspec;
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GtkStateFlags state;
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GValue value;
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};
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struct GtkStyleInfo
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{
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GtkStyleInfo *next;
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GArray *style_classes;
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GArray *regions;
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GtkJunctionSides junction_sides;
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GtkStateFlags state_flags;
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StyleData *data;
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};
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struct StyleData
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{
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GtkCssComputedValues *store;
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GArray *property_cache;
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guint ref_count;
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};
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struct _GtkStyleContextPrivate
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{
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GdkScreen *screen;
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guint cascade_changed_id;
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GtkStyleCascade *cascade;
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GtkStyleContext *parent;
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GSList *children;
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GtkWidget *widget;
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GtkWidgetPath *widget_path;
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GHashTable *style_data;
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GtkStyleInfo *info;
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gint scale;
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guint frame_clock_update_id;
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GdkFrameClock *frame_clock;
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GtkCssChange relevant_changes;
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GtkCssChange pending_changes;
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const GtkBitmask *invalidating_context;
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guint animating : 1;
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guint invalid : 1;
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};
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enum {
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PROP_0,
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PROP_SCREEN,
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PROP_DIRECTION,
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PROP_FRAME_CLOCK,
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PROP_PARENT
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};
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enum {
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CHANGED,
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LAST_SIGNAL
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};
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static guint signals[LAST_SIGNAL] = { 0 };
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static void gtk_style_context_finalize (GObject *object);
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static void gtk_style_context_impl_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_style_context_impl_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static StyleData *style_data_lookup (GtkStyleContext *context);
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static void gtk_style_context_disconnect_update (GtkStyleContext *context);
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static void gtk_style_context_connect_update (GtkStyleContext *context);
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G_DEFINE_TYPE_WITH_PRIVATE (GtkStyleContext, gtk_style_context, G_TYPE_OBJECT)
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static void
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gtk_style_context_real_changed (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv = context->priv;
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if (priv->widget)
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_gtk_widget_style_context_invalidated (priv->widget);
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}
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static void
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gtk_style_context_class_init (GtkStyleContextClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = gtk_style_context_finalize;
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object_class->set_property = gtk_style_context_impl_set_property;
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object_class->get_property = gtk_style_context_impl_get_property;
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klass->changed = gtk_style_context_real_changed;
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signals[CHANGED] =
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g_signal_new (I_("changed"),
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G_TYPE_FROM_CLASS (object_class),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GtkStyleContextClass, changed),
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NULL, NULL,
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g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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g_object_class_install_property (object_class,
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PROP_SCREEN,
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g_param_spec_object ("screen",
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P_("Screen"),
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P_("The associated GdkScreen"),
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GDK_TYPE_SCREEN,
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GTK_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_FRAME_CLOCK,
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g_param_spec_object ("paint-clock",
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P_("FrameClock"),
|
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P_("The associated GdkFrameClock"),
|
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GDK_TYPE_FRAME_CLOCK,
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GTK_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_DIRECTION,
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g_param_spec_enum ("direction",
|
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P_("Direction"),
|
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P_("Text direction"),
|
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GTK_TYPE_TEXT_DIRECTION,
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GTK_TEXT_DIR_LTR,
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GTK_PARAM_READWRITE));
|
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/**
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* GtkStyleContext:parent:
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*
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* Sets or gets the style context’s parent. See gtk_style_context_set_parent()
|
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* for details.
|
||
*
|
||
* Since: 3.4
|
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*/
|
||
g_object_class_install_property (object_class,
|
||
PROP_PARENT,
|
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g_param_spec_object ("parent",
|
||
P_("Parent"),
|
||
P_("The parent style context"),
|
||
GTK_TYPE_STYLE_CONTEXT,
|
||
GTK_PARAM_READWRITE));
|
||
}
|
||
|
||
static StyleData *
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||
style_data_new (void)
|
||
{
|
||
StyleData *data;
|
||
|
||
data = g_slice_new0 (StyleData);
|
||
data->ref_count = 1;
|
||
|
||
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 StyleData *
|
||
style_data_ref (StyleData *style_data)
|
||
{
|
||
style_data->ref_count++;
|
||
|
||
return style_data;
|
||
}
|
||
|
||
static void
|
||
style_data_unref (StyleData *data)
|
||
{
|
||
data->ref_count--;
|
||
|
||
if (data->ref_count > 0)
|
||
return;
|
||
|
||
g_object_unref (data->store);
|
||
clear_property_cache (data);
|
||
|
||
g_slice_free (StyleData, data);
|
||
}
|
||
|
||
static gboolean
|
||
style_data_is_animating (StyleData *style_data)
|
||
{
|
||
return !_gtk_css_computed_values_is_static (style_data->store);
|
||
}
|
||
|
||
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_set_data (GtkStyleInfo *info,
|
||
StyleData *data)
|
||
{
|
||
if (info->data == data)
|
||
return;
|
||
|
||
if (data)
|
||
style_data_ref (data);
|
||
|
||
if (info->data)
|
||
style_data_unref (info->data);
|
||
|
||
info->data = data;
|
||
}
|
||
|
||
static void
|
||
style_info_free (GtkStyleInfo *info)
|
||
{
|
||
style_info_set_data (info, NULL);
|
||
g_array_free (info->style_classes, TRUE);
|
||
g_array_free (info->regions, TRUE);
|
||
g_slice_free (GtkStyleInfo, info);
|
||
}
|
||
|
||
static GtkStyleInfo *
|
||
style_info_pop (GtkStyleInfo *info)
|
||
{
|
||
GtkStyleInfo *next = info->next;
|
||
|
||
style_info_free (info);
|
||
|
||
return next;
|
||
}
|
||
|
||
static GtkStyleInfo *
|
||
style_info_copy (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->next = info;
|
||
copy->junction_sides = info->junction_sides;
|
||
copy->state_flags = info->state_flags;
|
||
style_info_set_data (copy, info->data);
|
||
|
||
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 ^ info->state_flags;
|
||
}
|
||
|
||
static gboolean
|
||
style_info_equal (gconstpointer elem1,
|
||
gconstpointer elem2)
|
||
{
|
||
const GtkStyleInfo *info1, *info2;
|
||
|
||
info1 = elem1;
|
||
info2 = elem2;
|
||
|
||
if (info1->state_flags != info2->state_flags)
|
||
return FALSE;
|
||
|
||
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 void
|
||
gtk_style_context_cascade_changed (GtkStyleCascade *cascade,
|
||
GtkStyleContext *context)
|
||
{
|
||
_gtk_style_context_queue_invalidate (context, GTK_CSS_CHANGE_SOURCE);
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_set_cascade (GtkStyleContext *context,
|
||
GtkStyleCascade *cascade)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
|
||
priv = context->priv;
|
||
|
||
if (priv->cascade == cascade)
|
||
return;
|
||
|
||
if (priv->cascade)
|
||
{
|
||
g_signal_handler_disconnect (priv->cascade, priv->cascade_changed_id);
|
||
priv->cascade_changed_id = 0;
|
||
g_object_unref (priv->cascade);
|
||
}
|
||
|
||
if (cascade)
|
||
{
|
||
g_object_ref (cascade);
|
||
priv->cascade_changed_id = g_signal_connect (cascade,
|
||
"-gtk-private-changed",
|
||
G_CALLBACK (gtk_style_context_cascade_changed),
|
||
context);
|
||
}
|
||
|
||
priv->cascade = cascade;
|
||
|
||
if (cascade)
|
||
gtk_style_context_cascade_changed (cascade, context);
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_init (GtkStyleContext *style_context)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
|
||
priv = style_context->priv =
|
||
gtk_style_context_get_instance_private (style_context);
|
||
|
||
priv->style_data = g_hash_table_new_full (style_info_hash,
|
||
style_info_equal,
|
||
(GDestroyNotify) style_info_free,
|
||
(GDestroyNotify) style_data_unref);
|
||
|
||
priv->screen = gdk_screen_get_default ();
|
||
priv->relevant_changes = GTK_CSS_CHANGE_ANY;
|
||
|
||
/* Create default info store */
|
||
priv->info = style_info_new ();
|
||
priv->info->state_flags = GTK_STATE_FLAG_DIR_LTR;
|
||
|
||
gtk_style_context_set_cascade (style_context,
|
||
_gtk_style_cascade_get_for_screen (priv->screen));
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_update (GdkFrameClock *clock,
|
||
GtkStyleContext *context)
|
||
{
|
||
_gtk_style_context_queue_invalidate (context, GTK_CSS_CHANGE_ANIMATE);
|
||
}
|
||
|
||
static gboolean
|
||
gtk_style_context_is_animating (GtkStyleContext *context)
|
||
{
|
||
GtkStyleContextPrivate *priv = context->priv;
|
||
|
||
return priv->animating;
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_disconnect_update (GtkStyleContext *context)
|
||
{
|
||
GtkStyleContextPrivate *priv = context->priv;
|
||
|
||
if (priv->frame_clock && priv->frame_clock_update_id)
|
||
{
|
||
g_signal_handler_disconnect (priv->frame_clock,
|
||
priv->frame_clock_update_id);
|
||
priv->frame_clock_update_id = 0;
|
||
gdk_frame_clock_end_updating (priv->frame_clock);
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_connect_update (GtkStyleContext *context)
|
||
{
|
||
GtkStyleContextPrivate *priv = context->priv;
|
||
|
||
if (priv->frame_clock && priv->frame_clock_update_id == 0)
|
||
{
|
||
priv->frame_clock_update_id = g_signal_connect (priv->frame_clock,
|
||
"update",
|
||
G_CALLBACK (gtk_style_context_update),
|
||
context);
|
||
gdk_frame_clock_begin_updating (priv->frame_clock);
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_stop_animating (GtkStyleContext *context)
|
||
{
|
||
GtkStyleContextPrivate *priv = context->priv;
|
||
|
||
if (!gtk_style_context_is_animating (context))
|
||
return;
|
||
|
||
priv->animating = FALSE;
|
||
|
||
gtk_style_context_disconnect_update (context);
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_start_animating (GtkStyleContext *context)
|
||
{
|
||
GtkStyleContextPrivate *priv = context->priv;
|
||
|
||
if (gtk_style_context_is_animating (context))
|
||
return;
|
||
|
||
priv->animating = TRUE;
|
||
|
||
gtk_style_context_connect_update (context);
|
||
}
|
||
|
||
static gboolean
|
||
gtk_style_context_should_animate (GtkStyleContext *context)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
StyleData *data;
|
||
gboolean animate;
|
||
|
||
priv = context->priv;
|
||
|
||
if (priv->widget == NULL)
|
||
return FALSE;
|
||
|
||
if (!gtk_widget_get_mapped (priv->widget))
|
||
return FALSE;
|
||
|
||
data = style_data_lookup (context);
|
||
if (!style_data_is_animating (data))
|
||
return FALSE;
|
||
|
||
g_object_get (gtk_widget_get_settings (context->priv->widget),
|
||
"gtk-enable-animations", &animate,
|
||
NULL);
|
||
|
||
return animate;
|
||
}
|
||
|
||
void
|
||
_gtk_style_context_update_animating (GtkStyleContext *context)
|
||
{
|
||
if (gtk_style_context_should_animate (context))
|
||
gtk_style_context_start_animating (context);
|
||
else
|
||
gtk_style_context_stop_animating (context);
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_finalize (GObject *object)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
GtkStyleContext *style_context;
|
||
|
||
style_context = GTK_STYLE_CONTEXT (object);
|
||
priv = style_context->priv;
|
||
|
||
gtk_style_context_stop_animating (style_context);
|
||
|
||
/* children hold a reference to us */
|
||
g_assert (priv->children == NULL);
|
||
|
||
gtk_style_context_set_parent (style_context, NULL);
|
||
|
||
gtk_style_context_set_cascade (style_context, NULL);
|
||
|
||
if (priv->widget_path)
|
||
gtk_widget_path_free (priv->widget_path);
|
||
|
||
g_hash_table_destroy (priv->style_data);
|
||
|
||
while (priv->info)
|
||
priv->info = style_info_pop (priv->info);
|
||
|
||
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:
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
|
||
gtk_style_context_set_direction (style_context,
|
||
g_value_get_enum (value));
|
||
G_GNUC_END_IGNORE_DEPRECATIONS;
|
||
break;
|
||
case PROP_FRAME_CLOCK:
|
||
gtk_style_context_set_frame_clock (style_context,
|
||
g_value_get_object (value));
|
||
break;
|
||
case PROP_PARENT:
|
||
gtk_style_context_set_parent (style_context,
|
||
g_value_get_object (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_GNUC_BEGIN_IGNORE_DEPRECATIONS;
|
||
g_value_set_enum (value, gtk_style_context_get_direction (style_context));
|
||
G_GNUC_END_IGNORE_DEPRECATIONS;
|
||
break;
|
||
case PROP_FRAME_CLOCK:
|
||
g_value_set_object (value, priv->frame_clock);
|
||
break;
|
||
case PROP_PARENT:
|
||
g_value_set_object (value, priv->parent);
|
||
break;
|
||
default:
|
||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static GtkWidgetPath *
|
||
create_query_path (GtkStyleContext *context,
|
||
GtkStyleInfo *info)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
GtkWidgetPath *path;
|
||
guint i, pos;
|
||
|
||
priv = context->priv;
|
||
path = priv->widget ? _gtk_widget_create_path (priv->widget) : gtk_widget_path_copy (priv->widget_path);
|
||
pos = gtk_widget_path_length (path) - 1;
|
||
|
||
/* 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 void
|
||
build_properties (GtkStyleContext *context,
|
||
GtkCssComputedValues *values,
|
||
GtkStyleInfo *info,
|
||
const GtkBitmask *relevant_changes)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
GtkCssMatcher matcher;
|
||
GtkWidgetPath *path;
|
||
GtkCssLookup *lookup;
|
||
|
||
priv = context->priv;
|
||
|
||
path = create_query_path (context, info);
|
||
lookup = _gtk_css_lookup_new (relevant_changes);
|
||
|
||
if (_gtk_css_matcher_init (&matcher, path, info->state_flags))
|
||
_gtk_style_provider_private_lookup (GTK_STYLE_PROVIDER_PRIVATE (priv->cascade),
|
||
&matcher,
|
||
lookup);
|
||
|
||
_gtk_css_lookup_resolve (lookup,
|
||
GTK_STYLE_PROVIDER_PRIVATE (priv->cascade),
|
||
priv->scale,
|
||
values,
|
||
priv->parent ? style_data_lookup (priv->parent)->store : NULL);
|
||
|
||
_gtk_css_lookup_free (lookup);
|
||
gtk_widget_path_free (path);
|
||
}
|
||
|
||
static StyleData *
|
||
style_data_lookup (GtkStyleContext *context)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
GtkStyleInfo *info;
|
||
StyleData *data;
|
||
|
||
priv = context->priv;
|
||
info = priv->info;
|
||
|
||
/* Current data in use is cached, just return it */
|
||
if (info->data)
|
||
return info->data;
|
||
|
||
g_assert (priv->widget != NULL || priv->widget_path != NULL);
|
||
|
||
data = g_hash_table_lookup (priv->style_data, info);
|
||
if (data)
|
||
{
|
||
style_info_set_data (info, data);
|
||
return data;
|
||
}
|
||
|
||
data = style_data_new ();
|
||
data->store = _gtk_css_computed_values_new ();
|
||
style_info_set_data (info, data);
|
||
g_hash_table_insert (priv->style_data,
|
||
style_info_copy (info),
|
||
data);
|
||
|
||
build_properties (context, data->store, info, NULL);
|
||
|
||
return data;
|
||
}
|
||
|
||
static StyleData *
|
||
style_data_lookup_for_state (GtkStyleContext *context,
|
||
GtkStateFlags state)
|
||
{
|
||
StyleData *data;
|
||
|
||
if (context->priv->info->state_flags == state)
|
||
return style_data_lookup (context);
|
||
|
||
gtk_style_context_save (context);
|
||
gtk_style_context_set_state (context, state);
|
||
data = style_data_lookup (context);
|
||
gtk_style_context_restore (context);
|
||
|
||
return data;
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_set_invalid (GtkStyleContext *context,
|
||
gboolean invalid)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
|
||
priv = context->priv;
|
||
|
||
if (priv->invalid == invalid)
|
||
return;
|
||
|
||
priv->invalid = invalid;
|
||
|
||
if (invalid)
|
||
{
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
|
||
if (GTK_IS_RESIZE_CONTAINER (priv->widget))
|
||
_gtk_container_queue_restyle (GTK_CONTAINER (priv->widget));
|
||
else if (priv->parent)
|
||
gtk_style_context_set_invalid (priv->parent, TRUE);
|
||
G_GNUC_END_IGNORE_DEPRECATIONS;
|
||
}
|
||
}
|
||
|
||
/* returns TRUE if someone called gtk_style_context_save() but hasn’t
|
||
* called gtk_style_context_restore() yet.
|
||
* In those situations we don’t invalidate the context when somebody
|
||
* changes state/regions/classes.
|
||
*/
|
||
static gboolean
|
||
gtk_style_context_is_saved (GtkStyleContext *context)
|
||
{
|
||
return context->priv->info->next != NULL;
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_queue_invalidate_internal (GtkStyleContext *context,
|
||
GtkCssChange change)
|
||
{
|
||
GtkStyleContextPrivate *priv = context->priv;
|
||
GtkStyleInfo *info = priv->info;
|
||
|
||
if (gtk_style_context_is_saved (context))
|
||
{
|
||
style_info_set_data (info, NULL);
|
||
}
|
||
else
|
||
{
|
||
_gtk_style_context_queue_invalidate (context, change);
|
||
/* XXX: We need to invalidate siblings here somehow */
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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 #GtkWidget<!-- -->s, 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);
|
||
}
|
||
|
||
void
|
||
_gtk_style_context_set_widget (GtkStyleContext *context,
|
||
GtkWidget *widget)
|
||
{
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (widget == NULL || GTK_IS_WIDGET (widget));
|
||
|
||
context->priv->widget = widget;
|
||
|
||
_gtk_style_context_update_animating (context);
|
||
|
||
_gtk_style_context_queue_invalidate (context, GTK_CSS_CHANGE_ANY_SELF);
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
* Note that a style provider added by this function only affects
|
||
* the style of the widget to which @context belongs. If you want
|
||
* to affect the style of all widgets, use
|
||
* gtk_style_context_add_provider_for_screen().
|
||
*
|
||
* Note: 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;
|
||
|
||
if (priv->cascade == _gtk_style_cascade_get_for_screen (priv->screen))
|
||
{
|
||
GtkStyleCascade *new_cascade;
|
||
|
||
new_cascade = _gtk_style_cascade_new ();
|
||
_gtk_style_cascade_set_parent (new_cascade, priv->cascade);
|
||
_gtk_style_cascade_add_provider (new_cascade, provider, priority);
|
||
gtk_style_context_set_cascade (context, new_cascade);
|
||
g_object_unref (new_cascade);
|
||
}
|
||
else
|
||
{
|
||
_gtk_style_cascade_add_provider (priv->cascade, provider, priority);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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 (priv->cascade == _gtk_style_cascade_get_for_screen (priv->screen))
|
||
return;
|
||
|
||
_gtk_style_cascade_remove_provider (priv->cascade, provider);
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
*
|
||
* Note: 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)
|
||
{
|
||
GtkStyleCascade *cascade;
|
||
|
||
g_return_if_fail (GDK_IS_SCREEN (screen));
|
||
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
|
||
g_return_if_fail (!GTK_IS_SETTINGS (provider) || _gtk_settings_get_screen (GTK_SETTINGS (provider)) == screen);
|
||
|
||
cascade = _gtk_style_cascade_get_for_screen (screen);
|
||
_gtk_style_cascade_add_provider (cascade, provider, priority);
|
||
}
|
||
|
||
/**
|
||
* 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)
|
||
{
|
||
GtkStyleCascade *cascade;
|
||
|
||
g_return_if_fail (GDK_IS_SCREEN (screen));
|
||
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
|
||
g_return_if_fail (!GTK_IS_SETTINGS (provider));
|
||
|
||
cascade = _gtk_style_cascade_get_for_screen (screen);
|
||
_gtk_style_cascade_remove_provider (cascade, provider);
|
||
}
|
||
|
||
/**
|
||
* gtk_style_context_get_section:
|
||
* @context: a #GtkStyleContext
|
||
* @property: style property name
|
||
*
|
||
* Queries the location in the CSS where @property was defined for the
|
||
* current @context. Note that the state to be queried is taken from
|
||
* gtk_style_context_get_state().
|
||
*
|
||
* If the location is not available, %NULL will be returned. The
|
||
* location might not be available for various reasons, such as the
|
||
* property being overridden, @property not naming a supported CSS
|
||
* property or tracking of definitions being disabled for performance
|
||
* reasons.
|
||
*
|
||
* Shorthand CSS properties cannot be queried for a location and will
|
||
* always return %NULL.
|
||
*
|
||
* Returns: %NULL or the section where value was defined
|
||
**/
|
||
GtkCssSection *
|
||
gtk_style_context_get_section (GtkStyleContext *context,
|
||
const gchar *property)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
GtkStyleProperty *prop;
|
||
StyleData *data;
|
||
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
|
||
g_return_val_if_fail (property != NULL, NULL);
|
||
|
||
priv = context->priv;
|
||
g_return_val_if_fail (priv->widget != NULL || priv->widget_path != NULL, NULL);
|
||
|
||
prop = _gtk_style_property_lookup (property);
|
||
if (!GTK_IS_CSS_STYLE_PROPERTY (prop))
|
||
return NULL;
|
||
|
||
data = style_data_lookup (context);
|
||
return _gtk_css_computed_values_get_section (data->store, _gtk_css_style_property_get_id (GTK_CSS_STYLE_PROPERTY (prop)));
|
||
}
|
||
|
||
static GtkCssValue *
|
||
gtk_style_context_query_func (guint id,
|
||
gpointer values)
|
||
{
|
||
return _gtk_css_computed_values_get_value (values, id);
|
||
}
|
||
|
||
/**
|
||
* 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;
|
||
GtkStyleProperty *prop;
|
||
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 != NULL || priv->widget_path != NULL);
|
||
|
||
prop = _gtk_style_property_lookup (property);
|
||
if (prop == NULL)
|
||
{
|
||
g_warning ("Style property \"%s\" is not registered", property);
|
||
return;
|
||
}
|
||
if (_gtk_style_property_get_value_type (prop) == G_TYPE_NONE)
|
||
{
|
||
g_warning ("Style property \"%s\" is not gettable", property);
|
||
return;
|
||
}
|
||
|
||
data = style_data_lookup_for_state (context, state);
|
||
_gtk_style_property_query (prop, value, gtk_style_context_query_func, data->store);
|
||
}
|
||
|
||
/**
|
||
* 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)
|
||
{
|
||
const gchar *property_name;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
property_name = va_arg (args, const gchar *);
|
||
|
||
while (property_name)
|
||
{
|
||
gchar *error = NULL;
|
||
GValue value = G_VALUE_INIT;
|
||
|
||
gtk_style_context_get_property (context,
|
||
property_name,
|
||
state,
|
||
&value);
|
||
|
||
G_VALUE_LCOPY (&value, args, 0, &error);
|
||
g_value_unset (&value);
|
||
|
||
if (error)
|
||
{
|
||
g_warning ("Could not get style property \"%s\": %s", property_name, error);
|
||
g_free (error);
|
||
break;
|
||
}
|
||
|
||
property_name = va_arg (args, const gchar *);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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,
|
||
...)
|
||
{
|
||
va_list args;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
va_start (args, state);
|
||
gtk_style_context_get_valist (context, 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)
|
||
{
|
||
GtkStateFlags old_flags;
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
old_flags = context->priv->info->state_flags;
|
||
if (old_flags == flags)
|
||
return;
|
||
|
||
context->priv->info->state_flags = flags;
|
||
|
||
if (((old_flags ^ flags) & (GTK_STATE_FLAG_DIR_LTR | GTK_STATE_FLAG_DIR_RTL)) &&
|
||
!gtk_style_context_is_saved (context))
|
||
g_object_notify (G_OBJECT (context), "direction");
|
||
|
||
gtk_style_context_queue_invalidate_internal (context, GTK_CSS_CHANGE_STATE);
|
||
}
|
||
|
||
/**
|
||
* 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)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0);
|
||
|
||
return context->priv->info->state_flags;
|
||
}
|
||
|
||
/**
|
||
* gtk_style_context_set_scale:
|
||
* @context: a #GtkStyleContext
|
||
* @scale: scale
|
||
*
|
||
* Sets the scale to use when getting image assets for the style .
|
||
*
|
||
* Since: 3.10
|
||
**/
|
||
void
|
||
gtk_style_context_set_scale (GtkStyleContext *context,
|
||
gint scale)
|
||
{
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
if (context->priv->scale == scale)
|
||
return;
|
||
|
||
context->priv->scale = scale;
|
||
|
||
gtk_style_context_queue_invalidate_internal (context, GTK_CSS_CHANGE_SOURCE);
|
||
}
|
||
|
||
/**
|
||
* gtk_style_context_get_scale:
|
||
* @context: a #GtkStyleContext
|
||
*
|
||
* Returns the scale used for assets.
|
||
*
|
||
* Returns: the scale
|
||
*
|
||
* Since: 3.10
|
||
**/
|
||
gint
|
||
gtk_style_context_get_scale (GtkStyleContext *context)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0);
|
||
|
||
return context->priv->scale;
|
||
}
|
||
|
||
/**
|
||
* 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
|
||
*
|
||
* Deprecated: 3.6: This function always returns %FALSE
|
||
**/
|
||
gboolean
|
||
gtk_style_context_state_is_running (GtkStyleContext *context,
|
||
GtkStateType state,
|
||
gdouble *progress)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
|
||
|
||
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;
|
||
g_return_if_fail (priv->widget == NULL);
|
||
|
||
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_queue_invalidate (context, GTK_CSS_CHANGE_ANY);
|
||
}
|
||
|
||
/**
|
||
* 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;
|
||
if (priv->widget)
|
||
return gtk_widget_get_path (priv->widget);
|
||
else
|
||
return priv->widget_path;
|
||
}
|
||
|
||
/**
|
||
* gtk_style_context_set_parent:
|
||
* @context: a #GtkStyleContext
|
||
* @parent: (allow-none): the new parent or %NULL
|
||
*
|
||
* Sets the parent style context for @context. The parent style
|
||
* context is used to implement
|
||
* [inheritance](http://www.w3.org/TR/css3-cascade/#inheritance)
|
||
* of properties.
|
||
*
|
||
* If you are using a #GtkStyleContext returned from
|
||
* gtk_widget_get_style_context(), the parent will be set for you.
|
||
*
|
||
* Since: 3.4
|
||
**/
|
||
void
|
||
gtk_style_context_set_parent (GtkStyleContext *context,
|
||
GtkStyleContext *parent)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (parent == NULL || GTK_IS_STYLE_CONTEXT (parent));
|
||
|
||
priv = context->priv;
|
||
|
||
if (priv->parent == parent)
|
||
return;
|
||
|
||
if (parent)
|
||
{
|
||
parent->priv->children = g_slist_prepend (parent->priv->children, context);
|
||
g_object_ref (parent);
|
||
if (priv->invalid)
|
||
gtk_style_context_set_invalid (parent, TRUE);
|
||
}
|
||
|
||
if (priv->parent)
|
||
{
|
||
priv->parent->priv->children = g_slist_remove (priv->parent->priv->children, context);
|
||
g_object_unref (priv->parent);
|
||
}
|
||
|
||
priv->parent = parent;
|
||
|
||
g_object_notify (G_OBJECT (context), "parent");
|
||
_gtk_style_context_queue_invalidate (context, GTK_CSS_CHANGE_ANY_PARENT | GTK_CSS_CHANGE_ANY_SIBLING);
|
||
}
|
||
|
||
/**
|
||
* gtk_style_context_get_parent:
|
||
* @context: a #GtkStyleContext
|
||
*
|
||
* Gets the parent context set via gtk_style_context_set_parent().
|
||
* See that function for details.
|
||
*
|
||
* Returns: (transfer none): the parent context or %NULL
|
||
*
|
||
* Since: 3.4
|
||
**/
|
||
GtkStyleContext *
|
||
gtk_style_context_get_parent (GtkStyleContext *context)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
|
||
|
||
return context->priv->parent;
|
||
}
|
||
|
||
/**
|
||
* 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;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
priv = context->priv;
|
||
|
||
priv->info = style_info_copy (priv->info);
|
||
/* Need to unset animations here because we can not know what style
|
||
* class potential transitions came from once we save().
|
||
*/
|
||
if (priv->info->data && style_data_is_animating (priv->info->data))
|
||
style_info_set_data (priv->info, NULL);
|
||
}
|
||
|
||
/**
|
||
* 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;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
priv = context->priv;
|
||
|
||
priv->info = style_info_pop (priv->info);
|
||
|
||
if (!priv->info)
|
||
{
|
||
g_warning ("Unpaired gtk_style_context_restore() call");
|
||
|
||
/* Create default region */
|
||
priv->info = style_info_new ();
|
||
}
|
||
}
|
||
|
||
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);
|
||
|
||
info = priv->info;
|
||
|
||
if (!style_class_find (info->style_classes, class_quark, &position))
|
||
{
|
||
g_array_insert_val (info->style_classes, position, class_quark);
|
||
|
||
gtk_style_context_queue_invalidate_internal (context, GTK_CSS_CHANGE_CLASS);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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;
|
||
|
||
info = priv->info;
|
||
|
||
if (style_class_find (info->style_classes, class_quark, &position))
|
||
{
|
||
g_array_remove_index (info->style_classes, position);
|
||
|
||
gtk_style_context_queue_invalidate_internal (context, GTK_CSS_CHANGE_CLASS);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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;
|
||
|
||
info = priv->info;
|
||
|
||
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;
|
||
|
||
info = priv->info;
|
||
|
||
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;
|
||
|
||
info = priv->info;
|
||
|
||
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);
|
||
|
||
info = priv->info;
|
||
|
||
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);
|
||
|
||
gtk_style_context_queue_invalidate_internal (context, GTK_CSS_CHANGE_REGION);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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;
|
||
|
||
info = priv->info;
|
||
|
||
if (region_find (info->regions, region_quark, &position))
|
||
{
|
||
g_array_remove_index (info->regions, position);
|
||
|
||
gtk_style_context_queue_invalidate_internal (context, GTK_CSS_CHANGE_REGION);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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;
|
||
|
||
info = priv->info;
|
||
|
||
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;
|
||
}
|
||
|
||
GtkCssValue *
|
||
_gtk_style_context_peek_property (GtkStyleContext *context,
|
||
guint property_id)
|
||
{
|
||
StyleData *data = style_data_lookup (context);
|
||
|
||
return _gtk_css_computed_values_get_value (data->store, property_id);
|
||
}
|
||
|
||
const GValue *
|
||
_gtk_style_context_peek_style_property (GtkStyleContext *context,
|
||
GType widget_type,
|
||
GtkStateFlags state,
|
||
GParamSpec *pspec)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
PropertyValue *pcache, key = { 0 };
|
||
StyleData *data;
|
||
guint i;
|
||
|
||
priv = context->priv;
|
||
|
||
data = style_data_lookup_for_state (context, state);
|
||
|
||
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->widget || priv->widget_path)
|
||
{
|
||
GtkWidgetPath *widget_path = priv->widget ? _gtk_widget_create_path (priv->widget) : priv->widget_path;
|
||
|
||
if (gtk_style_provider_get_style_property (GTK_STYLE_PROVIDER (priv->cascade),
|
||
widget_path,
|
||
state, pspec, &pcache->value))
|
||
{
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
|
||
|
||
/* 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_style_context_resolve_color (context, _gtk_symbolic_color_get_css_value (color), &rgba, NULL))
|
||
{
|
||
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);
|
||
}
|
||
|
||
G_GNUC_END_IGNORE_DEPRECATIONS;
|
||
|
||
if (priv->widget)
|
||
gtk_widget_path_free (widget_path);
|
||
|
||
return &pcache->value;
|
||
}
|
||
|
||
if (priv->widget)
|
||
gtk_widget_path_free (widget_path);
|
||
}
|
||
|
||
/* 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)
|
||
{
|
||
widget_type = G_OBJECT_TYPE (priv->widget);
|
||
}
|
||
else
|
||
{
|
||
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)
|
||
{
|
||
widget_type = G_OBJECT_TYPE (priv->widget);
|
||
}
|
||
else
|
||
{
|
||
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);
|
||
break;
|
||
}
|
||
|
||
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);
|
||
break;
|
||
}
|
||
|
||
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
|
||
*
|
||
* Deprecated: 3.10: Use gtk_icon_theme_lookup_icon() instead.
|
||
**/
|
||
GtkIconSet *
|
||
gtk_style_context_lookup_icon_set (GtkStyleContext *context,
|
||
const gchar *stock_id)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
GtkIconSet *icon_set;
|
||
|
||
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 != NULL || priv->widget_path != NULL, NULL);
|
||
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
|
||
|
||
icon_set = gtk_icon_factory_lookup_default (stock_id);
|
||
|
||
G_GNUC_END_IGNORE_DEPRECATIONS;
|
||
|
||
return icon_set;
|
||
}
|
||
|
||
/**
|
||
* 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;
|
||
|
||
if (priv->cascade == _gtk_style_cascade_get_for_screen (priv->screen))
|
||
{
|
||
gtk_style_context_set_cascade (context, _gtk_style_cascade_get_for_screen (screen));
|
||
}
|
||
else
|
||
{
|
||
_gtk_style_cascade_set_parent (priv->cascade, _gtk_style_cascade_get_for_screen (screen));
|
||
}
|
||
|
||
priv->screen = screen;
|
||
|
||
g_object_notify (G_OBJECT (context), "screen");
|
||
}
|
||
|
||
/**
|
||
* 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_frame_clock:
|
||
* @context: a #GdkFrameClock
|
||
* @frame_clock: a #GdkFrameClock
|
||
*
|
||
* Attaches @context to the given frame clock.
|
||
*
|
||
* The frame clock is used for the timing of animations.
|
||
*
|
||
* If you are using a #GtkStyleContext returned from
|
||
* gtk_widget_get_style_context(), you do not need to
|
||
* call this yourself.
|
||
*
|
||
* Since: 3.8
|
||
**/
|
||
void
|
||
gtk_style_context_set_frame_clock (GtkStyleContext *context,
|
||
GdkFrameClock *frame_clock)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (frame_clock == NULL || GDK_IS_FRAME_CLOCK (frame_clock));
|
||
|
||
priv = context->priv;
|
||
if (priv->frame_clock == frame_clock)
|
||
return;
|
||
|
||
if (priv->animating)
|
||
gtk_style_context_disconnect_update (context);
|
||
|
||
if (priv->frame_clock)
|
||
g_object_unref (priv->frame_clock);
|
||
priv->frame_clock = frame_clock;
|
||
if (priv->frame_clock)
|
||
g_object_ref (priv->frame_clock);
|
||
|
||
if (priv->animating)
|
||
gtk_style_context_connect_update (context);
|
||
|
||
g_object_notify (G_OBJECT (context), "paint-clock");
|
||
}
|
||
|
||
/**
|
||
* gtk_style_context_get_frame_clock:
|
||
* @context: a #GtkStyleContext
|
||
*
|
||
* Returns the #GdkFrameClock to which @context is attached.
|
||
*
|
||
* Returns: (transfer none): a #GdkFrameClock, or %NULL
|
||
* if @context does not have an attached frame clock.
|
||
*
|
||
* Since: 3.8
|
||
**/
|
||
GdkFrameClock *
|
||
gtk_style_context_get_frame_clock (GtkStyleContext *context)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
|
||
|
||
priv = context->priv;
|
||
return priv->frame_clock;
|
||
}
|
||
|
||
/**
|
||
* 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
|
||
*
|
||
* Deprecated: 3.8: Use gtk_style_context_set_state() with
|
||
* #GTK_STATE_FLAG_DIR_LTR and #GTK_STATE_FLAG_DIR_RTL
|
||
* instead.
|
||
**/
|
||
void
|
||
gtk_style_context_set_direction (GtkStyleContext *context,
|
||
GtkTextDirection direction)
|
||
{
|
||
GtkStateFlags state;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
state = gtk_style_context_get_state (context);
|
||
state &= ~(GTK_STATE_FLAG_DIR_LTR | GTK_STATE_FLAG_DIR_RTL);
|
||
|
||
switch (direction)
|
||
{
|
||
case GTK_TEXT_DIR_LTR:
|
||
state |= GTK_STATE_FLAG_DIR_LTR;
|
||
break;
|
||
|
||
case GTK_TEXT_DIR_RTL:
|
||
state |= GTK_STATE_FLAG_DIR_RTL;
|
||
break;
|
||
|
||
case GTK_TEXT_DIR_NONE:
|
||
default:
|
||
break;
|
||
}
|
||
|
||
gtk_style_context_set_state (context, state);
|
||
}
|
||
|
||
/**
|
||
* gtk_style_context_get_direction:
|
||
* @context: a #GtkStyleContext
|
||
*
|
||
* Returns the widget direction used for rendering.
|
||
*
|
||
* Returns: the widget direction
|
||
*
|
||
* Since: 3.0
|
||
*
|
||
* Deprecated: 3.8: Use gtk_style_context_get_state() and
|
||
* check for #GTK_STATE_FLAG_DIR_LTR and
|
||
* #GTK_STATE_FLAG_DIR_RTL instead.
|
||
**/
|
||
GtkTextDirection
|
||
gtk_style_context_get_direction (GtkStyleContext *context)
|
||
{
|
||
GtkStateFlags state;
|
||
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), GTK_TEXT_DIR_LTR);
|
||
|
||
state = gtk_style_context_get_state (context);
|
||
|
||
if (state & GTK_STATE_FLAG_DIR_LTR)
|
||
return GTK_TEXT_DIR_LTR;
|
||
else if (state & GTK_STATE_FLAG_DIR_RTL)
|
||
return GTK_TEXT_DIR_RTL;
|
||
else
|
||
return GTK_TEXT_DIR_NONE;
|
||
}
|
||
|
||
/**
|
||
* 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)
|
||
{
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
context->priv->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)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0);
|
||
|
||
return context->priv->info->junction_sides;
|
||
}
|
||
|
||
gboolean
|
||
_gtk_style_context_resolve_color (GtkStyleContext *context,
|
||
GtkCssValue *color,
|
||
GdkRGBA *result,
|
||
GtkCssDependencies *dependencies)
|
||
{
|
||
GtkCssValue *val;
|
||
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
|
||
g_return_val_if_fail (color != NULL, FALSE);
|
||
g_return_val_if_fail (result != NULL, FALSE);
|
||
|
||
val = _gtk_css_color_value_resolve (color,
|
||
GTK_STYLE_PROVIDER_PRIVATE (context->priv->cascade),
|
||
_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR),
|
||
GTK_CSS_DEPENDS_ON_COLOR,
|
||
dependencies,
|
||
NULL);
|
||
if (val == NULL)
|
||
return FALSE;
|
||
|
||
*result = *_gtk_css_rgba_value_get_rgba (val);
|
||
_gtk_css_value_unref (val);
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* 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)
|
||
{
|
||
GtkCssValue *value;
|
||
|
||
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);
|
||
|
||
value = _gtk_style_provider_private_get_color (GTK_STYLE_PROVIDER_PRIVATE (context->priv->cascade), color_name);
|
||
if (value == NULL)
|
||
return FALSE;
|
||
|
||
return _gtk_style_context_resolve_color (context, value, color, NULL);
|
||
}
|
||
|
||
/**
|
||
* 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:
|
||
* |[<!-- language="C" -->
|
||
* 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
|
||
*
|
||
* Deprecated: 3.6: This function does nothing.
|
||
**/
|
||
void
|
||
gtk_style_context_notify_state_change (GtkStyleContext *context,
|
||
GdkWindow *window,
|
||
gpointer region_id,
|
||
GtkStateType state,
|
||
gboolean state_value)
|
||
{
|
||
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);
|
||
g_return_if_fail (context->priv->widget != NULL || context->priv->widget_path != NULL);
|
||
}
|
||
|
||
/**
|
||
* 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
|
||
*
|
||
* Deprecated: 3.6: This function does nothing.
|
||
**/
|
||
void
|
||
gtk_style_context_cancel_animations (GtkStyleContext *context,
|
||
gpointer region_id)
|
||
{
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
}
|
||
|
||
/**
|
||
* 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
|
||
*
|
||
* Deprecated: 3.6: This function does nothing.
|
||
**/
|
||
void
|
||
gtk_style_context_scroll_animations (GtkStyleContext *context,
|
||
GdkWindow *window,
|
||
gint dx,
|
||
gint dy)
|
||
{
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (GDK_IS_WINDOW (window));
|
||
}
|
||
|
||
/**
|
||
* 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
|
||
*
|
||
* Deprecated: 3.6: This function does nothing.
|
||
**/
|
||
void
|
||
gtk_style_context_push_animatable_region (GtkStyleContext *context,
|
||
gpointer region_id)
|
||
{
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (region_id != NULL);
|
||
}
|
||
|
||
/**
|
||
* 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
|
||
*
|
||
* Deprecated: 3.6: This function does nothing.
|
||
**/
|
||
void
|
||
gtk_style_context_pop_animatable_region (GtkStyleContext *context)
|
||
{
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_clear_cache (GtkStyleContext *context)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
GtkStyleInfo *info;
|
||
|
||
priv = context->priv;
|
||
|
||
for (info = priv->info; info; info = info->next)
|
||
{
|
||
style_info_set_data (info, NULL);
|
||
}
|
||
g_hash_table_remove_all (priv->style_data);
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_update_cache (GtkStyleContext *context,
|
||
const GtkBitmask *parent_changes)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
GHashTableIter iter;
|
||
gpointer key, value;
|
||
|
||
if (_gtk_bitmask_is_empty (parent_changes))
|
||
return;
|
||
|
||
priv = context->priv;
|
||
|
||
g_hash_table_iter_init (&iter, priv->style_data);
|
||
while (g_hash_table_iter_next (&iter, &key, &value))
|
||
{
|
||
GtkStyleInfo *info = key;
|
||
StyleData *data = value;
|
||
GtkBitmask *changes;
|
||
|
||
changes = _gtk_css_computed_values_compute_dependencies (data->store, parent_changes);
|
||
|
||
if (!_gtk_bitmask_is_empty (changes))
|
||
build_properties (context, data->store, info, changes);
|
||
|
||
_gtk_bitmask_free (changes);
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_style_context_do_invalidate (GtkStyleContext *context,
|
||
const GtkBitmask *changes)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
priv = context->priv;
|
||
|
||
/* Avoid reentrancy */
|
||
if (priv->invalidating_context)
|
||
return;
|
||
|
||
priv->invalidating_context = changes;
|
||
|
||
g_signal_emit (context, signals[CHANGED], 0);
|
||
|
||
priv->invalidating_context = NULL;
|
||
}
|
||
|
||
static GtkBitmask *
|
||
gtk_style_context_update_animations (GtkStyleContext *context,
|
||
gint64 timestamp)
|
||
{
|
||
GtkBitmask *differences;
|
||
StyleData *style_data;
|
||
|
||
style_data = style_data_lookup (context);
|
||
|
||
differences = _gtk_css_computed_values_advance (style_data->store,
|
||
timestamp);
|
||
|
||
if (_gtk_css_computed_values_is_static (style_data->store))
|
||
_gtk_style_context_update_animating (context);
|
||
|
||
return differences;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_style_context_needs_full_revalidate (GtkStyleContext *context,
|
||
GtkCssChange change)
|
||
{
|
||
GtkStyleContextPrivate *priv = context->priv;
|
||
|
||
/* Try to avoid invalidating if we can */
|
||
if (change & GTK_STYLE_CONTEXT_RADICAL_CHANGE)
|
||
{
|
||
priv->relevant_changes = GTK_CSS_CHANGE_ANY;
|
||
}
|
||
else
|
||
{
|
||
if (priv->relevant_changes == GTK_CSS_CHANGE_ANY)
|
||
{
|
||
GtkWidgetPath *path;
|
||
GtkCssMatcher matcher, superset;
|
||
|
||
path = create_query_path (context, priv->info);
|
||
if (_gtk_css_matcher_init (&matcher, path, priv->info->state_flags))
|
||
{
|
||
_gtk_css_matcher_superset_init (&superset, &matcher, GTK_STYLE_CONTEXT_RADICAL_CHANGE & ~GTK_CSS_CHANGE_SOURCE);
|
||
priv->relevant_changes = _gtk_style_provider_private_get_change (GTK_STYLE_PROVIDER_PRIVATE (priv->cascade),
|
||
&superset);
|
||
}
|
||
else
|
||
priv->relevant_changes = 0;
|
||
|
||
priv->relevant_changes &= ~GTK_STYLE_CONTEXT_RADICAL_CHANGE;
|
||
|
||
gtk_widget_path_unref (path);
|
||
}
|
||
}
|
||
|
||
if (priv->relevant_changes & change)
|
||
return TRUE;
|
||
else
|
||
return FALSE;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_style_context_should_create_transitions (GtkStyleContext *context)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
gboolean animate;
|
||
|
||
priv = context->priv;
|
||
|
||
if (priv->widget == NULL)
|
||
return FALSE;
|
||
|
||
if (!gtk_widget_get_mapped (priv->widget))
|
||
return FALSE;
|
||
|
||
g_object_get (gtk_widget_get_settings (context->priv->widget),
|
||
"gtk-enable-animations", &animate,
|
||
NULL);
|
||
|
||
return animate;
|
||
}
|
||
|
||
void
|
||
_gtk_style_context_validate (GtkStyleContext *context,
|
||
gint64 timestamp,
|
||
GtkCssChange change,
|
||
const GtkBitmask *parent_changes)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
GtkStyleInfo *info;
|
||
StyleData *current;
|
||
GtkBitmask *changes;
|
||
GSList *list;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
priv = context->priv;
|
||
|
||
change |= priv->pending_changes;
|
||
|
||
/* If you run your application with
|
||
* GTK_DEBUG=no-css-cache
|
||
* every invalidation will purge the cache and completely query
|
||
* everything anew form the cache. This is slow (in particular
|
||
* when animating), but useful for figuring out bugs.
|
||
*
|
||
* We achieve that by pretending that everything that could have
|
||
* changed has and so we of course totally need to redo everything.
|
||
*
|
||
* Note that this also completely revalidates child widgets all
|
||
* the time.
|
||
*/
|
||
if (G_UNLIKELY (gtk_get_debug_flags () & GTK_DEBUG_NO_CSS_CACHE))
|
||
change = GTK_CSS_CHANGE_ANY;
|
||
|
||
if (!priv->invalid && change == 0 && _gtk_bitmask_is_empty (parent_changes))
|
||
return;
|
||
|
||
priv->pending_changes = 0;
|
||
gtk_style_context_set_invalid (context, FALSE);
|
||
|
||
info = priv->info;
|
||
if (info->data)
|
||
current = style_data_ref (info->data);
|
||
else
|
||
current = NULL;
|
||
|
||
/* Try to avoid invalidating if we can */
|
||
if (current == NULL ||
|
||
gtk_style_context_needs_full_revalidate (context, change))
|
||
{
|
||
StyleData *data;
|
||
|
||
if ((priv->relevant_changes & change) & ~GTK_STYLE_CONTEXT_CACHED_CHANGE)
|
||
{
|
||
gtk_style_context_clear_cache (context);
|
||
}
|
||
else
|
||
{
|
||
gtk_style_context_update_cache (context, parent_changes);
|
||
style_info_set_data (info, NULL);
|
||
}
|
||
|
||
data = style_data_lookup (context);
|
||
|
||
_gtk_css_computed_values_create_animations (data->store,
|
||
priv->parent ? style_data_lookup (priv->parent)->store : NULL,
|
||
timestamp,
|
||
GTK_STYLE_PROVIDER_PRIVATE (priv->cascade),
|
||
priv->scale,
|
||
current && gtk_style_context_should_create_transitions (context) ? current->store : NULL);
|
||
if (_gtk_css_computed_values_is_static (data->store))
|
||
change &= ~GTK_CSS_CHANGE_ANIMATE;
|
||
else
|
||
change |= GTK_CSS_CHANGE_ANIMATE;
|
||
_gtk_style_context_update_animating (context);
|
||
|
||
if (current)
|
||
{
|
||
changes = _gtk_css_computed_values_get_difference (data->store, current->store);
|
||
|
||
/* In the case where we keep the cache, we want unanimated values */
|
||
_gtk_css_computed_values_cancel_animations (current->store);
|
||
}
|
||
else
|
||
{
|
||
changes = _gtk_bitmask_new ();
|
||
changes = _gtk_bitmask_invert_range (changes, 0, _gtk_css_style_property_get_n_properties ());
|
||
}
|
||
}
|
||
else
|
||
{
|
||
changes = _gtk_css_computed_values_compute_dependencies (current->store, parent_changes);
|
||
|
||
gtk_style_context_update_cache (context, parent_changes);
|
||
}
|
||
|
||
if (current)
|
||
style_data_unref (current);
|
||
|
||
if (change & GTK_CSS_CHANGE_ANIMATE &&
|
||
gtk_style_context_is_animating (context))
|
||
{
|
||
GtkBitmask *animation_changes;
|
||
|
||
animation_changes = gtk_style_context_update_animations (context, timestamp);
|
||
changes = _gtk_bitmask_union (changes, animation_changes);
|
||
_gtk_bitmask_free (animation_changes);
|
||
}
|
||
|
||
if (change & GTK_CSS_CHANGE_FORCE_INVALIDATE)
|
||
{
|
||
GtkBitmask *full = _gtk_bitmask_new ();
|
||
full = _gtk_bitmask_invert_range (full,
|
||
0,
|
||
_gtk_css_style_property_get_n_properties ());
|
||
gtk_style_context_do_invalidate (context, full);
|
||
_gtk_bitmask_free (full);
|
||
}
|
||
else if (!_gtk_bitmask_is_empty (changes))
|
||
{
|
||
gtk_style_context_do_invalidate (context, changes);
|
||
}
|
||
|
||
change = _gtk_css_change_for_child (change);
|
||
for (list = priv->children; list; list = list->next)
|
||
{
|
||
_gtk_style_context_validate (list->data, timestamp, change, changes);
|
||
}
|
||
|
||
_gtk_bitmask_free (changes);
|
||
}
|
||
|
||
void
|
||
_gtk_style_context_queue_invalidate (GtkStyleContext *context,
|
||
GtkCssChange change)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (change != 0);
|
||
|
||
priv = context->priv;
|
||
|
||
if (priv->widget != NULL)
|
||
{
|
||
priv->pending_changes |= change;
|
||
gtk_style_context_set_invalid (context, TRUE);
|
||
}
|
||
else if (priv->widget_path != NULL)
|
||
{
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
|
||
gtk_style_context_invalidate (context);
|
||
G_GNUC_END_IGNORE_DEPRECATIONS;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_style_context_invalidate:
|
||
* @context: a #GtkStyleContext.
|
||
*
|
||
* Invalidates @context style information, so it will be reconstructed
|
||
* again. It is useful if you modify the @context and need the new
|
||
* information immediately.
|
||
*
|
||
* Since: 3.0
|
||
*
|
||
* Deprecated: 3.12: Style contexts are invalidated automatically.
|
||
**/
|
||
void
|
||
gtk_style_context_invalidate (GtkStyleContext *context)
|
||
{
|
||
GtkBitmask *changes;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
gtk_style_context_clear_cache (context);
|
||
|
||
changes = _gtk_bitmask_new ();
|
||
changes = _gtk_bitmask_invert_range (changes,
|
||
0,
|
||
_gtk_css_style_property_get_n_properties ());
|
||
gtk_style_context_do_invalidate (context, changes);
|
||
_gtk_bitmask_free (changes);
|
||
}
|
||
|
||
static gboolean
|
||
corner_value_is_right_angle (GtkCssValue *value)
|
||
{
|
||
return _gtk_css_corner_value_get_x (value, 100) <= 0.0 &&
|
||
_gtk_css_corner_value_get_y (value, 100) <= 0.0;
|
||
}
|
||
|
||
/**
|
||
* 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)
|
||
{
|
||
const GdkRGBA *color;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (GDK_IS_WINDOW (window));
|
||
|
||
/* This is a sophisitcated optimization.
|
||
* If we know the GDK window's background will be opaque, we mark
|
||
* it as opaque. This is so GDK can do all the optimizations it does
|
||
* for opaque windows and be fast.
|
||
* This is mainly used when scrolling.
|
||
*
|
||
* We could indeed just set black instead of the color we have.
|
||
*/
|
||
color = _gtk_css_rgba_value_get_rgba (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BACKGROUND_COLOR));
|
||
|
||
if (color->alpha >= 1.0 &&
|
||
corner_value_is_right_angle (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_TOP_LEFT_RADIUS)) &&
|
||
corner_value_is_right_angle (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_TOP_RIGHT_RADIUS)) &&
|
||
corner_value_is_right_angle (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_BOTTOM_RIGHT_RADIUS)) &&
|
||
corner_value_is_right_angle (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_BOTTOM_LEFT_RADIUS)))
|
||
{
|
||
gdk_window_set_background_rgba (window, color);
|
||
}
|
||
else
|
||
{
|
||
GdkRGBA transparent = { 0.0, 0.0, 0.0, 0.0 };
|
||
gdk_window_set_background_rgba (window, &transparent);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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)
|
||
{
|
||
int top, left, bottom, right;
|
||
|
||
g_return_if_fail (border != NULL);
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
gtk_style_context_get (context,
|
||
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)
|
||
{
|
||
int top, left, bottom, right;
|
||
|
||
g_return_if_fail (padding != NULL);
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
gtk_style_context_get (context,
|
||
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)
|
||
{
|
||
int top, left, bottom, right;
|
||
|
||
g_return_if_fail (margin != NULL);
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
|
||
gtk_style_context_get (context,
|
||
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
|
||
*
|
||
* Deprecated: 3.8: Use gtk_style_context_get() for "font" or
|
||
* subproperties instead.
|
||
**/
|
||
const PangoFontDescription *
|
||
gtk_style_context_get_font (GtkStyleContext *context,
|
||
GtkStateFlags state)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
StyleData *data;
|
||
PangoFontDescription *description, *previous;
|
||
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
|
||
|
||
priv = context->priv;
|
||
g_return_val_if_fail (priv->widget != NULL || priv->widget_path != NULL, NULL);
|
||
|
||
data = style_data_lookup_for_state (context, state);
|
||
|
||
/* Yuck, fonts are created on-demand but we don't return a ref.
|
||
* Do bad things to achieve this requirement */
|
||
gtk_style_context_get (context, state, "font", &description, NULL);
|
||
|
||
previous = g_object_get_data (G_OBJECT (data->store), "font-cache-for-get_font");
|
||
|
||
if (previous)
|
||
{
|
||
pango_font_description_merge (previous, description, TRUE);
|
||
pango_font_description_free (description);
|
||
description = previous;
|
||
}
|
||
else
|
||
{
|
||
g_object_set_data_full (G_OBJECT (data->store),
|
||
"font-cache-for-get_font",
|
||
description,
|
||
(GDestroyNotify) pango_font_description_free);
|
||
}
|
||
|
||
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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return;
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_check (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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return;
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_option (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: X origin of the render area
|
||
* @y: Y origin of 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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (size <= 0)
|
||
return;
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
gtk_style_context_save (context);
|
||
gtk_style_context_add_class (context, GTK_STYLE_CLASS_ARROW);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_arrow (engine, cr,
|
||
angle, x, y, size);
|
||
|
||
gtk_style_context_restore (context);
|
||
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
|
||
* `background-image`, `border-width` and `border-radius`:
|
||
*
|
||
* 
|
||
*
|
||
* Since: 3.0.
|
||
**/
|
||
void
|
||
gtk_render_background (GtkStyleContext *context,
|
||
cairo_t *cr,
|
||
gdouble x,
|
||
gdouble y,
|
||
gdouble width,
|
||
gdouble height)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return;
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_background (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 `border-image`,
|
||
* `border-color`, `border-width`, `border-radius` and junctions:
|
||
*
|
||
* 
|
||
*
|
||
* Since: 3.0
|
||
**/
|
||
void
|
||
gtk_render_frame (GtkStyleContext *context,
|
||
cairo_t *cr,
|
||
gdouble x,
|
||
gdouble y,
|
||
gdouble width,
|
||
gdouble height)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return;
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_frame (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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return;
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_expander (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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return;
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_focus (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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (PANGO_IS_LAYOUT (layout));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_layout (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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_line (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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return;
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_slider (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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
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);
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_frame_gap (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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return;
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_extension (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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return;
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_handle (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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return;
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_activity (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
|
||
*
|
||
* Deprecated: 3.10: Use gtk_icon_theme_load_icon() instead.
|
||
**/
|
||
GdkPixbuf *
|
||
gtk_render_icon_pixbuf (GtkStyleContext *context,
|
||
const GtkIconSource *source,
|
||
GtkIconSize size)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
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);
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
return engine_class->render_icon_pixbuf (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)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_icon (engine, cr, pixbuf, x, y);
|
||
|
||
cairo_restore (cr);
|
||
}
|
||
|
||
/**
|
||
* gtk_render_icon_surface:
|
||
* @context: a #GtkStyleContext
|
||
* @cr: a #cairo_t
|
||
* @surface: a #cairo_surface_t containing the icon to draw
|
||
* @x: X position for the @icon
|
||
* @y: Y position for the @incon
|
||
*
|
||
* Renders the icon in @surface at the specified @x and @y coordinates.
|
||
*
|
||
* Since: 3.10
|
||
**/
|
||
void
|
||
gtk_render_icon_surface (GtkStyleContext *context,
|
||
cairo_t *cr,
|
||
cairo_surface_t *surface,
|
||
gdouble x,
|
||
gdouble y)
|
||
{
|
||
GtkThemingEngineClass *engine_class;
|
||
GtkThemingEngine *engine;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
|
||
engine = _gtk_css_engine_value_get_engine (_gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_ENGINE));
|
||
engine_class = GTK_THEMING_ENGINE_GET_CLASS (engine);
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_theming_engine_set_context (engine, context);
|
||
engine_class->render_icon_surface (engine, cr, surface, x, y);
|
||
|
||
cairo_restore (cr);
|
||
}
|
||
|
||
static void
|
||
draw_insertion_cursor (GtkStyleContext *context,
|
||
cairo_t *cr,
|
||
gdouble x,
|
||
gdouble y,
|
||
gdouble height,
|
||
gboolean is_primary,
|
||
PangoDirection direction,
|
||
gboolean draw_arrow)
|
||
|
||
{
|
||
GdkRGBA primary_color;
|
||
GdkRGBA secondary_color;
|
||
gfloat cursor_aspect_ratio;
|
||
gint stem_width;
|
||
gint offset;
|
||
|
||
cairo_save (cr);
|
||
cairo_new_path (cr);
|
||
|
||
_gtk_style_context_get_cursor_color (context, &primary_color, &secondary_color);
|
||
gdk_cairo_set_source_rgba (cr, is_primary ? &primary_color : &secondary_color);
|
||
|
||
/* When changing the shape or size of the cursor here,
|
||
* propagate the changes to gtktextview.c:text_window_invalidate_cursors().
|
||
*/
|
||
|
||
gtk_style_context_get_style (context,
|
||
"cursor-aspect-ratio", &cursor_aspect_ratio,
|
||
NULL);
|
||
|
||
stem_width = height * cursor_aspect_ratio + 1;
|
||
|
||
/* put (stem_width % 2) on the proper side of the cursor */
|
||
if (direction == PANGO_DIRECTION_LTR)
|
||
offset = stem_width / 2;
|
||
else
|
||
offset = stem_width - stem_width / 2;
|
||
|
||
cairo_rectangle (cr, x - offset, y, stem_width, height);
|
||
cairo_fill (cr);
|
||
|
||
if (draw_arrow)
|
||
{
|
||
gint arrow_width;
|
||
gint ax, ay;
|
||
|
||
arrow_width = stem_width + 1;
|
||
|
||
if (direction == PANGO_DIRECTION_RTL)
|
||
{
|
||
ax = x - offset - 1;
|
||
ay = y + height - arrow_width * 2 - arrow_width + 1;
|
||
|
||
cairo_move_to (cr, ax, ay + 1);
|
||
cairo_line_to (cr, ax - arrow_width, ay + arrow_width);
|
||
cairo_line_to (cr, ax, ay + 2 * arrow_width);
|
||
cairo_fill (cr);
|
||
}
|
||
else if (direction == PANGO_DIRECTION_LTR)
|
||
{
|
||
ax = x + stem_width - offset;
|
||
ay = y + height - arrow_width * 2 - arrow_width + 1;
|
||
|
||
cairo_move_to (cr, ax, ay + 1);
|
||
cairo_line_to (cr, ax + arrow_width, ay + arrow_width);
|
||
cairo_line_to (cr, ax, ay + 2 * arrow_width);
|
||
cairo_fill (cr);
|
||
}
|
||
else
|
||
g_assert_not_reached();
|
||
}
|
||
|
||
cairo_restore (cr);
|
||
}
|
||
|
||
/**
|
||
* gtk_render_insertion_cursor:
|
||
* @context: a #GtkStyleContext
|
||
* @cr: a #cairo_t
|
||
* @x: X origin
|
||
* @y: Y origin
|
||
* @layout: the #PangoLayout of the text
|
||
* @index: the index in the #PangoLayout
|
||
* @direction: the #PangoDirection of the text
|
||
*
|
||
* Draws a text caret on @cr at the specified index of @layout.
|
||
*
|
||
* Since: 3.4
|
||
**/
|
||
void
|
||
gtk_render_insertion_cursor (GtkStyleContext *context,
|
||
cairo_t *cr,
|
||
gdouble x,
|
||
gdouble y,
|
||
PangoLayout *layout,
|
||
int index,
|
||
PangoDirection direction)
|
||
{
|
||
GtkStyleContextPrivate *priv;
|
||
gboolean split_cursor;
|
||
PangoRectangle strong_pos, weak_pos;
|
||
PangoRectangle *cursor1, *cursor2;
|
||
PangoDirection keymap_direction;
|
||
PangoDirection direction2;
|
||
|
||
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
|
||
g_return_if_fail (cr != NULL);
|
||
g_return_if_fail (PANGO_IS_LAYOUT (layout));
|
||
g_return_if_fail (index >= 0);
|
||
|
||
priv = context->priv;
|
||
|
||
g_object_get (gtk_settings_get_for_screen (priv->screen),
|
||
"gtk-split-cursor", &split_cursor,
|
||
NULL);
|
||
|
||
keymap_direction = gdk_keymap_get_direction (gdk_keymap_get_for_display (gdk_screen_get_display (priv->screen)));
|
||
|
||
pango_layout_get_cursor_pos (layout, index, &strong_pos, &weak_pos);
|
||
|
||
direction2 = PANGO_DIRECTION_NEUTRAL;
|
||
|
||
if (split_cursor)
|
||
{
|
||
cursor1 = &strong_pos;
|
||
|
||
if (strong_pos.x != weak_pos.x || strong_pos.y != weak_pos.y)
|
||
{
|
||
direction2 = (direction == PANGO_DIRECTION_LTR) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR;
|
||
cursor2 = &weak_pos;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (keymap_direction == direction)
|
||
cursor1 = &strong_pos;
|
||
else
|
||
cursor1 = &weak_pos;
|
||
}
|
||
|
||
draw_insertion_cursor (context,
|
||
cr,
|
||
x + PANGO_PIXELS (cursor1->x),
|
||
y + PANGO_PIXELS (cursor1->y),
|
||
PANGO_PIXELS (cursor1->height),
|
||
TRUE,
|
||
direction,
|
||
direction2 != PANGO_DIRECTION_NEUTRAL);
|
||
|
||
if (direction2 != PANGO_DIRECTION_NEUTRAL)
|
||
{
|
||
draw_insertion_cursor (context,
|
||
cr,
|
||
x + PANGO_PIXELS (cursor2->x),
|
||
y + PANGO_PIXELS (cursor2->y),
|
||
PANGO_PIXELS (cursor2->height),
|
||
FALSE,
|
||
direction2,
|
||
TRUE);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_draw_insertion_cursor:
|
||
* @widget: a #GtkWidget
|
||
* @cr: cairo context to draw to
|
||
* @location: location where to draw the cursor (@location->width is ignored)
|
||
* @is_primary: if the cursor should be the primary cursor color.
|
||
* @direction: whether the cursor is left-to-right or
|
||
* right-to-left. Should never be #GTK_TEXT_DIR_NONE
|
||
* @draw_arrow: %TRUE to draw a directional arrow on the
|
||
* cursor. Should be %FALSE unless the cursor is split.
|
||
*
|
||
* Draws a text caret on @cr at @location. This is not a style function
|
||
* but merely a convenience function for drawing the standard cursor shape.
|
||
*
|
||
* Since: 3.0
|
||
* Deprecated: 3.4: Use gtk_render_insertion_cursor() instead.
|
||
*/
|
||
void
|
||
gtk_draw_insertion_cursor (GtkWidget *widget,
|
||
cairo_t *cr,
|
||
const GdkRectangle *location,
|
||
gboolean is_primary,
|
||
GtkTextDirection direction,
|
||
gboolean draw_arrow)
|
||
{
|
||
GtkStyleContext *context;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
g_return_if_fail (cr != NULL);
|
||
g_return_if_fail (location != NULL);
|
||
g_return_if_fail (direction != GTK_TEXT_DIR_NONE);
|
||
|
||
context = gtk_widget_get_style_context (widget);
|
||
|
||
draw_insertion_cursor (context, cr,
|
||
location->x, location->y, location->height,
|
||
is_primary,
|
||
(direction == GTK_TEXT_DIR_RTL) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR,
|
||
draw_arrow);
|
||
}
|
||
|
||
/**
|
||
* _gtk_style_context_get_changes:
|
||
* @context: the context to query
|
||
*
|
||
* Queries the context for the changes for the currently executing
|
||
* GtkStyleContext::invalidate signal. If no signal is currently
|
||
* emitted, this function returns %NULL.
|
||
*
|
||
* FIXME 4.0: Make this part of the signal.
|
||
*
|
||
* Returns: %NULL or the currently invalidating changes
|
||
**/
|
||
const GtkBitmask *
|
||
_gtk_style_context_get_changes (GtkStyleContext *context)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
|
||
|
||
return context->priv->invalidating_context;
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
cairo_pattern_t *
|
||
gtk_gradient_resolve_for_context (GtkGradient *gradient,
|
||
GtkStyleContext *context)
|
||
{
|
||
GtkStyleContextPrivate *priv = context->priv;
|
||
GtkCssDependencies ignored = 0;
|
||
|
||
g_return_val_if_fail (gradient != NULL, NULL);
|
||
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
|
||
|
||
return _gtk_gradient_resolve_full (gradient,
|
||
GTK_STYLE_PROVIDER_PRIVATE (priv->cascade),
|
||
style_data_lookup (context)->store,
|
||
priv->parent ? style_data_lookup (priv->parent)->store : NULL,
|
||
&ignored);
|
||
}
|
||
|