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gtk2/gtk/gtkstylecontext.c
Benjamin Otte 242893a031 css: Pass the parent context to _gtk_css_lookup_resolve() 
This way, we can resolve inherit properties.
2012-01-09 18:37:50 +01:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gdk/gdk.h>
#include <math.h>
#include <stdlib.h>
#include <gobject/gvaluecollector.h>
#include "gtkstylecontextprivate.h"
#include "gtkstylepropertiesprivate.h"
#include "gtktypebuiltins.h"
#include "gtkthemingengine.h"
#include "gtkintl.h"
#include "gtkwidget.h"
#include "gtkwindow.h"
#include "gtkprivate.h"
#include "gtksymboliccolorprivate.h"
#include "gtkanimationdescription.h"
#include "gtktimeline.h"
#include "gtkiconfactory.h"
#include "gtkwidgetprivate.h"
#include "gtkstyleproviderprivate.h"
/**
* SECTION:gtkstylecontext
* @Short_description: Rendering UI elements
* @Title: GtkStyleContext
*
* #GtkStyleContext is an object that stores styling information affecting
* a widget defined by #GtkWidgetPath.
*
* In order to construct the final style information, #GtkStyleContext
* queries information from all attached #GtkStyleProviders. Style providers
* can be either attached explicitly to the context through
* gtk_style_context_add_provider(), or to the screen through
* gtk_style_context_add_provider_for_screen(). The resulting style is a
* combination of all providers' information in priority order.
*
* For GTK+ widgets, any #GtkStyleContext returned by
* gtk_widget_get_style_context() will already have a #GtkWidgetPath, a
* #GdkScreen and RTL/LTR information set. The style context will be also
* updated automatically if any of these settings change on the widget.
*
* If you are using the theming layer standalone, you will need to set a
* widget path and a screen yourself to the created style context through
* gtk_style_context_set_path() and gtk_style_context_set_screen(), as well
* as updating the context yourself using gtk_style_context_invalidate()
* whenever any of the conditions change, such as a change in the
* #GtkSettings:gtk-theme-name setting or a hierarchy change in the rendered
* widget.
*
* <refsect2 id="gtkstylecontext-animations">
* <title>Transition animations</title>
* <para>
* #GtkStyleContext has built-in support for state change transitions.
* Note that these animations respect the #GtkSettings:gtk-enable-animations
* setting.
* </para>
* <para>
* For simple widgets where state changes affect the whole widget area,
* calling gtk_style_context_notify_state_change() with a %NULL region
* is sufficient to trigger the transition animation. And GTK+ already
* does that when gtk_widget_set_state() or gtk_widget_set_state_flags()
* are called.
* </para>
* <para>
* If a widget needs to declare several animatable regions (i.e. not
* affecting the whole widget area), its #GtkWidget::draw signal handler
* needs to wrap the render operations for the different regions with
* calls to gtk_style_context_push_animatable_region() and
* gtk_style_context_pop_animatable_region(). These functions take an
* identifier for the region which must be unique within the style context.
* For simple widgets with a fixed set of animatable regions, using an
* enumeration works well:
* </para>
* <example>
* <title>Using an enumeration to identify animatable regions</title>
* <programlisting>
* enum {
* REGION_ENTRY,
* REGION_BUTTON_UP,
* REGION_BUTTON_DOWN
* };
*
* ...
*
* gboolean
* spin_button_draw (GtkWidget *widget,
* cairo_t *cr)
* {
* GtkStyleContext *context;
*
* context = gtk_widget_get_style_context (widget);
*
* gtk_style_context_push_animatable_region (context,
* GUINT_TO_POINTER (REGION_ENTRY));
*
* gtk_render_background (cr, 0, 0, 100, 30);
* gtk_render_frame (cr, 0, 0, 100, 30);
*
* gtk_style_context_pop_animatable_region (context);
*
* ...
* }
* </programlisting>
* </example>
* <para>
* For complex widgets with an arbitrary number of animatable regions, it
* is up to the implementation to come up with a way to uniquely identify
* each animatable region. Using pointers to internal structs is one way
* to achieve this:
* </para>
* <example>
* <title>Using struct pointers to identify animatable regions</title>
* <programlisting>
* void
* notebook_draw_tab (GtkWidget *widget,
* NotebookPage *page,
* cairo_t *cr)
* {
* gtk_style_context_push_animatable_region (context, page);
* gtk_render_extension (cr, page->x, page->y, page->width, page->height);
* gtk_style_context_pop_animatable_region (context);
* }
* </programlisting>
* </example>
* <para>
* The widget also needs to notify the style context about a state change
* for a given animatable region so the animation is triggered.
* </para>
* <example>
* <title>Triggering a state change animation on a region</title>
* <programlisting>
* gboolean
* notebook_motion_notify (GtkWidget *widget,
* GdkEventMotion *event)
* {
* GtkStyleContext *context;
* NotebookPage *page;
*
* context = gtk_widget_get_style_context (widget);
* page = find_page_under_pointer (widget, event);
* gtk_style_context_notify_state_change (context,
* gtk_widget_get_window (widget),
* page,
* GTK_STATE_PRELIGHT,
* TRUE);
* ...
* }
* </programlisting>
* </example>
* <para>
* gtk_style_context_notify_state_change() accepts %NULL region IDs as a
* special value, in this case, the whole widget area will be updated
* by the animation.
* </para>
* </refsect2>
* <refsect2 id="gtkstylecontext-classes">
* <title>Style classes and regions</title>
* <para>
* Widgets can add style classes to their context, which can be used
* to associate different styles by class (see <xref linkend="gtkcssprovider-selectors"/>). Theme engines can also use style classes to vary their
* rendering. GTK+ has a number of predefined style classes:
* #GTK_STYLE_CLASS_CELL,
* #GTK_STYLE_CLASS_ENTRY,
* #GTK_STYLE_CLASS_BUTTON,
* #GTK_STYLE_CLASS_COMBOBOX_ENTRY,
* #GTK_STYLE_CLASS_CALENDAR,
* #GTK_STYLE_CLASS_SLIDER,
* #GTK_STYLE_CLASS_BACKGROUND,
* #GTK_STYLE_CLASS_RUBBERBAND,
* #GTK_STYLE_CLASS_TOOLTIP,
* #GTK_STYLE_CLASS_MENU,
* #GTK_STYLE_CLASS_MENUBAR,
* #GTK_STYLE_CLASS_MENUITEM,
* #GTK_STYLE_CLASS_TOOLBAR,
* #GTK_STYLE_CLASS_PRIMARY_TOOLBAR,
* #GTK_STYLE_CLASS_INLINE_TOOLBAR,
* #GTK_STYLE_CLASS_RADIO,
* #GTK_STYLE_CLASS_CHECK,
* #GTK_STYLE_CLASS_TROUGH,
* #GTK_STYLE_CLASS_SCROLLBAR,
* #GTK_STYLE_CLASS_SCALE,
* #GTK_STYLE_CLASS_SCALE_HAS_MARKS_ABOVE,
* #GTK_STYLE_CLASS_SCALE_HAS_MARKS_BELOW,
* #GTK_STYLE_CLASS_HEADER,
* #GTK_STYLE_CLASS_ACCELERATOR,
* #GTK_STYLE_CLASS_GRIP,
* #GTK_STYLE_CLASS_DOCK,
* #GTK_STYLE_CLASS_PROGRESSBAR,
* #GTK_STYLE_CLASS_SPINNER,
* #GTK_STYLE_CLASS_EXPANDER,
* #GTK_STYLE_CLASS_SPINBUTTON,
* #GTK_STYLE_CLASS_NOTEBOOK,
* #GTK_STYLE_CLASS_VIEW,
* #GTK_STYLE_CLASS_SIDEBAR,
* #GTK_STYLE_CLASS_IMAGE,
* #GTK_STYLE_CLASS_HIGHLIGHT,
* #GTK_STYLE_CLASS_FRAME,
* #GTK_STYLE_CLASS_DND,
* #GTK_STYLE_CLASS_PANE_SEPARATOR,
* #GTK_STYLE_CLASS_SEPARATOR,
* #GTK_STYLE_CLASS_INFO,
* #GTK_STYLE_CLASS_WARNING,
* #GTK_STYLE_CLASS_QUESTION,
* #GTK_STYLE_CLASS_ERROR,
* #GTK_STYLE_CLASS_HORIZONTAL,
* #GTK_STYLE_CLASS_VERTICAL,
* #GTK_STYLE_CLASS_TOP,
* #GTK_STYLE_CLASS_BOTTOM,
* #GTK_STYLE_CLASS_LEFT,
* #GTK_STYLE_CLASS_RIGHT,
* </para>
* <para>
* Widgets can also add regions with flags to their context.
* The regions used by GTK+ widgets are:
* <informaltable>
* <tgroup cols="4">
* <thead>
* <row>
* <entry>Region</entry>
* <entry>Flags</entry>
* <entry>Macro</entry>
* <entry>Used by</entry>
* </row>
* </thead>
* <tbody>
* <row>
* <entry>row</entry>
* <entry>even, odd</entry>
* <entry>GTK_STYLE_REGION_ROW</entry>
* <entry>#GtkTreeView</entry>
* </row>
* <row>
* <entry>column</entry>
* <entry>first, last, sorted</entry>
* <entry>GTK_STYLE_REGION_COLUMN</entry>
* <entry>#GtkTreeView</entry>
* </row>
* <row>
* <entry>column-header</entry>
* <entry></entry>
* <entry>GTK_STYLE_REGION_COLUMN_HEADER</entry>
* <entry></entry>
* </row>
* <row>
* <entry>tab</entry>
* <entry>even, odd, first, last</entry>
* <entry>GTK_STYLE_REGION_TAB</entry>
* <entry>#GtkNotebook</entry>
* </row>
* </tbody>
* </tgroup>
* </informaltable>
* </para>
* </refsect2>
* <refsect2 id="gtkstylecontext-custom-styling">
* <title>Custom styling in UI libraries and applications</title>
* <para>
* If you are developing a library with custom #GtkWidget<!-- -->s that
* render differently than standard components, you may need to add a
* #GtkStyleProvider yourself with the %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK
* priority, either a #GtkCssProvider or a custom object implementing the
* #GtkStyleProvider interface. This way theming engines may still attempt
* to style your UI elements in a different way if needed so.
* </para>
* <para>
* If you are using custom styling on an applications, you probably want then
* to make your style information prevail to the theme's, so you must use
* a #GtkStyleProvider with the %GTK_STYLE_PROVIDER_PRIORITY_APPLICATION
* priority, keep in mind that the user settings in
* <filename><replaceable>XDG_CONFIG_HOME</replaceable>/gtk-3.0/gtk.css</filename> will
* still take precedence over your changes, as it uses the
* %GTK_STYLE_PROVIDER_PRIORITY_USER priority.
* </para>
* <para>
* If a custom theming engine is needed, you probably want to implement a
* #GtkStyleProvider yourself so it points to your #GtkThemingEngine
* implementation, as #GtkCssProvider uses gtk_theming_engine_load()
* which loads the theming engine module from the standard paths.
* </para>
* </refsect2>
*/
typedef struct GtkStyleProviderData GtkStyleProviderData;
typedef struct GtkStyleInfo GtkStyleInfo;
typedef struct GtkRegion GtkRegion;
typedef struct PropertyValue PropertyValue;
typedef struct AnimationInfo AnimationInfo;
typedef struct StyleData StyleData;
struct GtkRegion
{
GQuark class_quark;
GtkRegionFlags flags;
};
struct GtkStyleProviderData
{
GtkStyleProvider *provider;
guint priority;
};
struct PropertyValue
{
GType widget_type;
GParamSpec *pspec;
GtkStateFlags state;
GValue value;
};
struct GtkStyleInfo
{
GArray *style_classes;
GArray *regions;
GtkJunctionSides junction_sides;
GtkStateFlags state_flags;
};
struct StyleData
{
GtkStyleProperties *store;
GSList *icon_factories;
GArray *property_cache;
};
struct AnimationInfo
{
GtkTimeline *timeline;
gpointer region_id;
/* Region stack (until region_id) at the time of
* rendering, this is used for nested cancellation.
*/
GSList *parent_regions;
GdkWindow *window;
GtkStateType state;
gboolean target_value;
cairo_region_t *invalidation_region;
GArray *rectangles;
};
struct _GtkStyleContextPrivate
{
GdkScreen *screen;
GList *providers;
GList *providers_last;
GtkStyleContext *parent;
GtkWidgetPath *widget_path;
GHashTable *style_data;
GSList *info_stack;
StyleData *current_data;
GtkStateFlags current_state;
GSList *animation_regions;
GSList *animations;
GtkThemingEngine *theming_engine;
GtkTextDirection direction;
guint animations_invalidated : 1;
guint invalidating_context : 1;
};
enum {
PROP_0,
PROP_SCREEN,
PROP_DIRECTION,
PROP_PARENT
};
enum {
CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
static GQuark provider_list_quark = 0;
static void gtk_style_context_finalize (GObject *object);
static void gtk_style_context_impl_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_style_context_impl_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static GtkSymbolicColor *
gtk_style_context_color_lookup_func (gpointer contextp,
const char *name);
G_DEFINE_TYPE (GtkStyleContext, gtk_style_context, G_TYPE_OBJECT)
static void
gtk_style_context_class_init (GtkStyleContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gtk_style_context_finalize;
object_class->set_property = gtk_style_context_impl_set_property;
object_class->get_property = gtk_style_context_impl_get_property;
signals[CHANGED] =
g_signal_new (I_("changed"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkStyleContextClass, changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
g_object_class_install_property (object_class,
PROP_SCREEN,
g_param_spec_object ("screen",
P_("Screen"),
P_("The associated GdkScreen"),
GDK_TYPE_SCREEN,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_DIRECTION,
g_param_spec_enum ("direction",
P_("Direction"),
P_("Text direction"),
GTK_TYPE_TEXT_DIRECTION,
GTK_TEXT_DIR_LTR,
GTK_PARAM_READWRITE));
/**
* GtkStyleContext:parent:
*
* Sets or gets the style context's parent. See gtk_style_context_set_parent()
* for details.
*
* Since: 3.4
*/
g_object_class_install_property (object_class,
PROP_PARENT,
g_param_spec_object ("parent",
P_("Parent"),
P_("The parent style context"),
GTK_TYPE_STYLE_CONTEXT,
GTK_PARAM_READWRITE));
g_type_class_add_private (object_class, sizeof (GtkStyleContextPrivate));
}
static GtkStyleInfo *
style_info_new (void)
{
GtkStyleInfo *info;
info = g_slice_new0 (GtkStyleInfo);
info->style_classes = g_array_new (FALSE, FALSE, sizeof (GQuark));
info->regions = g_array_new (FALSE, FALSE, sizeof (GtkRegion));
return info;
}
static void
style_info_free (GtkStyleInfo *info)
{
g_array_free (info->style_classes, TRUE);
g_array_free (info->regions, TRUE);
g_slice_free (GtkStyleInfo, info);
}
static GtkStyleInfo *
style_info_copy (const GtkStyleInfo *info)
{
GtkStyleInfo *copy;
copy = style_info_new ();
g_array_insert_vals (copy->style_classes, 0,
info->style_classes->data,
info->style_classes->len);
g_array_insert_vals (copy->regions, 0,
info->regions->data,
info->regions->len);
copy->junction_sides = info->junction_sides;
copy->state_flags = info->state_flags;
return copy;
}
static guint
style_info_hash (gconstpointer elem)
{
const GtkStyleInfo *info;
guint i, hash = 0;
info = elem;
for (i = 0; i < info->style_classes->len; i++)
{
hash += g_array_index (info->style_classes, GQuark, i);
hash <<= 5;
}
for (i = 0; i < info->regions->len; i++)
{
GtkRegion *region;
region = &g_array_index (info->regions, GtkRegion, i);
hash += region->class_quark;
hash += region->flags;
hash <<= 5;
}
return hash ^ 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 StyleData *
style_data_new (void)
{
StyleData *data;
data = g_slice_new0 (StyleData);
return data;
}
static void
clear_property_cache (StyleData *data)
{
guint i;
if (!data->property_cache)
return;
for (i = 0; i < data->property_cache->len; i++)
{
PropertyValue *node = &g_array_index (data->property_cache, PropertyValue, i);
g_param_spec_unref (node->pspec);
g_value_unset (&node->value);
}
g_array_free (data->property_cache, TRUE);
data->property_cache = NULL;
}
static void
style_data_free (StyleData *data)
{
g_object_unref (data->store);
clear_property_cache (data);
g_slist_free_full (data->icon_factories, g_object_unref);
g_slice_free (StyleData, data);
}
static void
gtk_style_context_init (GtkStyleContext *style_context)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
priv = style_context->priv = G_TYPE_INSTANCE_GET_PRIVATE (style_context,
GTK_TYPE_STYLE_CONTEXT,
GtkStyleContextPrivate);
priv->style_data = g_hash_table_new_full (style_info_hash,
style_info_equal,
(GDestroyNotify) style_info_free,
(GDestroyNotify) style_data_free);
priv->theming_engine = g_object_ref ((gpointer) gtk_theming_engine_load (NULL));
priv->direction = GTK_TEXT_DIR_LTR;
priv->screen = gdk_screen_get_default ();
/* Create default info store */
info = style_info_new ();
priv->info_stack = g_slist_prepend (priv->info_stack, info);
}
static GtkStyleProviderData *
style_provider_data_new (GtkStyleProvider *provider,
guint priority)
{
GtkStyleProviderData *data;
data = g_slice_new (GtkStyleProviderData);
data->provider = g_object_ref (provider);
data->priority = priority;
return data;
}
static void
style_provider_data_free (GtkStyleProviderData *data)
{
g_object_unref (data->provider);
g_slice_free (GtkStyleProviderData, data);
}
static void
animation_info_free (AnimationInfo *info)
{
g_object_unref (info->timeline);
g_object_unref (info->window);
if (info->invalidation_region)
cairo_region_destroy (info->invalidation_region);
g_array_free (info->rectangles, TRUE);
g_slist_free (info->parent_regions);
g_slice_free (AnimationInfo, info);
}
static AnimationInfo *
animation_info_lookup_by_timeline (GtkStyleContext *context,
GtkTimeline *timeline)
{
GtkStyleContextPrivate *priv;
AnimationInfo *info;
GSList *l;
priv = context->priv;
for (l = priv->animations; l; l = l->next)
{
info = l->data;
if (info->timeline == timeline)
return info;
}
return NULL;
}
static void
timeline_frame_cb (GtkTimeline *timeline,
gdouble progress,
gpointer user_data)
{
GtkStyleContextPrivate *priv;
GtkStyleContext *context;
AnimationInfo *info;
context = user_data;
priv = context->priv;
info = animation_info_lookup_by_timeline (context, timeline);
g_assert (info != NULL);
/* Cancel transition if window is gone */
if (gdk_window_is_destroyed (info->window) ||
!gdk_window_is_visible (info->window))
{
priv->animations = g_slist_remove (priv->animations, info);
animation_info_free (info);
return;
}
if (info->invalidation_region &&
!cairo_region_is_empty (info->invalidation_region))
gdk_window_invalidate_region (info->window, info->invalidation_region, TRUE);
else
gdk_window_invalidate_rect (info->window, NULL, TRUE);
}
static void
timeline_finished_cb (GtkTimeline *timeline,
gpointer user_data)
{
GtkStyleContextPrivate *priv;
GtkStyleContext *context;
AnimationInfo *info;
context = user_data;
priv = context->priv;
info = animation_info_lookup_by_timeline (context, timeline);
g_assert (info != NULL);
priv->animations = g_slist_remove (priv->animations, info);
/* Invalidate one last time the area, so the final content is painted */
if (info->invalidation_region &&
!cairo_region_is_empty (info->invalidation_region))
gdk_window_invalidate_region (info->window, info->invalidation_region, TRUE);
else
gdk_window_invalidate_rect (info->window, NULL, TRUE);
animation_info_free (info);
}
static AnimationInfo *
animation_info_new (GtkStyleContext *context,
gpointer region_id,
guint duration,
GtkTimelineProgressType progress_type,
gboolean loop,
GtkStateType state,
gboolean target_value,
GdkWindow *window)
{
AnimationInfo *info;
info = g_slice_new0 (AnimationInfo);
info->rectangles = g_array_new (FALSE, FALSE, sizeof (cairo_rectangle_int_t));
info->timeline = _gtk_timeline_new (duration);
info->window = g_object_ref (window);
info->state = state;
info->target_value = target_value;
info->region_id = region_id;
_gtk_timeline_set_progress_type (info->timeline, progress_type);
_gtk_timeline_set_loop (info->timeline, loop);
if (!loop && !target_value)
{
_gtk_timeline_set_direction (info->timeline, GTK_TIMELINE_DIRECTION_BACKWARD);
_gtk_timeline_rewind (info->timeline);
}
g_signal_connect (info->timeline, "frame",
G_CALLBACK (timeline_frame_cb), context);
g_signal_connect (info->timeline, "finished",
G_CALLBACK (timeline_finished_cb), context);
_gtk_timeline_start (info->timeline);
return info;
}
static AnimationInfo *
animation_info_lookup (GtkStyleContext *context,
gpointer region_id,
GtkStateType state)
{
GtkStyleContextPrivate *priv;
GSList *l;
priv = context->priv;
for (l = priv->animations; l; l = l->next)
{
AnimationInfo *info;
info = l->data;
if (info->state == state &&
info->region_id == region_id)
return info;
}
return NULL;
}
static void
gtk_style_context_finalize (GObject *object)
{
GtkStyleContextPrivate *priv;
GtkStyleContext *style_context;
GSList *l;
style_context = GTK_STYLE_CONTEXT (object);
priv = style_context->priv;
gtk_style_context_set_parent (style_context, NULL);
if (priv->widget_path)
gtk_widget_path_free (priv->widget_path);
g_hash_table_destroy (priv->style_data);
g_list_free_full (priv->providers, (GDestroyNotify) style_provider_data_free);
g_slist_free_full (priv->info_stack, (GDestroyNotify) style_info_free);
g_slist_free (priv->animation_regions);
for (l = priv->animations; l; l = l->next)
animation_info_free ((AnimationInfo *) l->data);
g_slist_free (priv->animations);
if (priv->theming_engine)
g_object_unref (priv->theming_engine);
G_OBJECT_CLASS (gtk_style_context_parent_class)->finalize (object);
}
static void
gtk_style_context_impl_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkStyleContext *style_context;
style_context = GTK_STYLE_CONTEXT (object);
switch (prop_id)
{
case PROP_SCREEN:
gtk_style_context_set_screen (style_context,
g_value_get_object (value));
break;
case PROP_DIRECTION:
gtk_style_context_set_direction (style_context,
g_value_get_enum (value));
break;
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_value_set_enum (value, priv->direction);
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 GList *
find_next_candidate (GList *local,
GList *global,
gboolean ascending)
{
if (local && global)
{
GtkStyleProviderData *local_data, *global_data;
local_data = local->data;
global_data = global->data;
if (local_data->priority < global_data->priority)
return (ascending) ? local : global;
else
return (ascending) ? global : local;
}
else if (local)
return local;
else if (global)
return global;
return NULL;
}
static void
build_properties (GtkStyleContext *context,
StyleData *style_data,
GtkWidgetPath *path,
GtkStateFlags state)
{
GtkStyleContextPrivate *priv;
GList *elem, *list, *global_list = NULL;
GtkCssLookup *lookup;
priv = context->priv;
list = priv->providers_last;
if (priv->screen)
{
global_list = g_object_get_qdata (G_OBJECT (priv->screen), provider_list_quark);
global_list = g_list_last (global_list);
}
lookup = _gtk_css_lookup_new ();
while ((elem = find_next_candidate (list, global_list, FALSE)) != NULL)
{
GtkStyleProviderData *data;
GtkStyleProperties *provider_style;
data = elem->data;
if (elem == list)
list = list->prev;
else
global_list = global_list->prev;
if (GTK_IS_STYLE_PROVIDER_PRIVATE (data->provider))
{
_gtk_style_provider_private_lookup (GTK_STYLE_PROVIDER_PRIVATE (data->provider),
path,
state,
lookup);
}
else
{
provider_style = gtk_style_provider_get_style (data->provider, path);
if (provider_style)
{
_gtk_style_provider_private_lookup (GTK_STYLE_PROVIDER_PRIVATE (provider_style),
path,
state,
lookup);
g_object_unref (provider_style);
}
}
}
style_data->store = _gtk_css_lookup_resolve (lookup, priv->parent);
_gtk_style_properties_set_color_lookup_func (style_data->store,
gtk_style_context_color_lookup_func,
context);
_gtk_css_lookup_free (lookup);
}
static void
build_icon_factories (GtkStyleContext *context,
StyleData *style_data,
GtkWidgetPath *path)
{
GtkStyleContextPrivate *priv;
GList *elem, *list, *global_list = NULL;
priv = context->priv;
list = priv->providers_last;
if (priv->screen)
{
global_list = g_object_get_qdata (G_OBJECT (priv->screen), provider_list_quark);
global_list = g_list_last (global_list);
}
while ((elem = find_next_candidate (list, global_list, FALSE)) != NULL)
{
GtkIconFactory *factory;
GtkStyleProviderData *data;
data = elem->data;
if (elem == list)
list = list->prev;
else
global_list = global_list->prev;
factory = gtk_style_provider_get_icon_factory (data->provider, path);
if (factory)
style_data->icon_factories = g_slist_prepend (style_data->icon_factories, factory);
}
}
static GtkWidgetPath *
create_query_path (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
GtkWidgetPath *path;
GtkStyleInfo *info;
guint i, pos;
priv = context->priv;
path = gtk_widget_path_copy (priv->widget_path);
pos = gtk_widget_path_length (path) - 1;
info = priv->info_stack->data;
/* Set widget regions */
for (i = 0; i < info->regions->len; i++)
{
GtkRegion *region;
region = &g_array_index (info->regions, GtkRegion, i);
gtk_widget_path_iter_add_region (path, pos,
g_quark_to_string (region->class_quark),
region->flags);
}
/* Set widget classes */
for (i = 0; i < info->style_classes->len; i++)
{
GQuark quark;
quark = g_array_index (info->style_classes, GQuark, i);
gtk_widget_path_iter_add_class (path, pos,
g_quark_to_string (quark));
}
return path;
}
static StyleData *
style_data_lookup (GtkStyleContext *context,
GtkStateFlags state)
{
GtkStyleContextPrivate *priv;
StyleData *data;
gboolean state_mismatch;
priv = context->priv;
state_mismatch = ((GtkStyleInfo *) priv->info_stack->data)->state_flags != state;
/* Current data in use is cached, just return it */
if (priv->current_data && priv->current_state == state)
return priv->current_data;
g_assert (priv->widget_path != NULL);
if (G_UNLIKELY (state_mismatch))
{
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
}
data = g_hash_table_lookup (priv->style_data, priv->info_stack->data);
if (!data)
{
GtkWidgetPath *path;
data = style_data_new ();
path = create_query_path (context);
build_properties (context, data, path, state);
build_icon_factories (context, data, path);
g_hash_table_insert (priv->style_data,
style_info_copy (priv->info_stack->data),
data);
gtk_widget_path_free (path);
}
if (G_UNLIKELY (state_mismatch))
{
gtk_style_context_restore (context);
}
else
{
if (priv->theming_engine)
g_object_unref (priv->theming_engine);
gtk_style_properties_get (data->store, 0,
"engine", &priv->theming_engine,
NULL);
if (!priv->theming_engine)
priv->theming_engine = g_object_ref (gtk_theming_engine_load (NULL));
}
priv->current_data = data;
priv->current_state = state;
return data;
}
static void
style_provider_add (GList **list,
GtkStyleProvider *provider,
guint priority)
{
GtkStyleProviderData *new_data;
gboolean added = FALSE;
GList *l = *list;
new_data = style_provider_data_new (provider, priority);
while (l)
{
GtkStyleProviderData *data;
data = l->data;
/* Provider was already attached to the style
* context, remove in order to add the new data
*/
if (data->provider == provider)
{
GList *link;
link = l;
l = l->next;
/* Remove and free link */
*list = g_list_remove_link (*list, link);
style_provider_data_free (link->data);
g_list_free_1 (link);
continue;
}
if (!added &&
data->priority > priority)
{
*list = g_list_insert_before (*list, l, new_data);
added = TRUE;
}
l = l->next;
}
if (!added)
*list = g_list_append (*list, new_data);
}
static gboolean
style_provider_remove (GList **list,
GtkStyleProvider *provider)
{
GList *l = *list;
while (l)
{
GtkStyleProviderData *data;
data = l->data;
if (data->provider == provider)
{
*list = g_list_remove_link (*list, l);
style_provider_data_free (l->data);
g_list_free_1 (l);
return TRUE;
}
l = l->next;
}
return FALSE;
}
/**
* gtk_style_context_new:
*
* Creates a standalone #GtkStyleContext, this style context
* won't be attached to any widget, so you may want
* to call gtk_style_context_set_path() yourself.
*
* <note>
* 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.
* </note>
*
* Returns: A newly created #GtkStyleContext.
**/
GtkStyleContext *
gtk_style_context_new (void)
{
return g_object_new (GTK_TYPE_STYLE_CONTEXT, NULL);
}
/**
* gtk_style_context_add_provider:
* @context: a #GtkStyleContext
* @provider: a #GtkStyleProvider
* @priority: the priority of the style provider. The lower
* it is, the earlier it will be used in the style
* construction. Typically this will be in the range
* between %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and
* %GTK_STYLE_PROVIDER_PRIORITY_USER
*
* Adds a style provider to @context, to be used in style construction.
*
* <note><para>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().</para></note>
*
* Since: 3.0
**/
void
gtk_style_context_add_provider (GtkStyleContext *context,
GtkStyleProvider *provider,
guint priority)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
priv = context->priv;
style_provider_add (&priv->providers, provider, priority);
priv->providers_last = g_list_last (priv->providers);
gtk_style_context_invalidate (context);
}
/**
* gtk_style_context_remove_provider:
* @context: a #GtkStyleContext
* @provider: a #GtkStyleProvider
*
* Removes @provider from the style providers list in @context.
*
* Since: 3.0
**/
void
gtk_style_context_remove_provider (GtkStyleContext *context,
GtkStyleProvider *provider)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
priv = context->priv;
if (style_provider_remove (&priv->providers, provider))
{
priv->providers_last = g_list_last (priv->providers);
gtk_style_context_invalidate (context);
}
}
/**
* gtk_style_context_reset_widgets:
* @screen: a #GdkScreen
*
* This function recomputes the styles for all widgets under a particular
* #GdkScreen. This is useful when some global parameter has changed that
* affects the appearance of all widgets, because when a widget gets a new
* style, it will both redraw and recompute any cached information about
* its appearance. As an example, it is used when the color scheme changes
* in the related #GtkSettings object.
*
* Since: 3.0
**/
void
gtk_style_context_reset_widgets (GdkScreen *screen)
{
GList *list, *toplevels;
_gtk_icon_set_invalidate_caches ();
toplevels = gtk_window_list_toplevels ();
g_list_foreach (toplevels, (GFunc) g_object_ref, NULL);
for (list = toplevels; list; list = list->next)
{
if (gtk_widget_get_screen (list->data) == screen)
gtk_widget_reset_style (list->data);
g_object_unref (list->data);
}
g_list_free (toplevels);
}
/**
* gtk_style_context_add_provider_for_screen:
* @screen: a #GdkScreen
* @provider: a #GtkStyleProvider
* @priority: the priority of the style provider. The lower
* it is, the earlier it will be used in the style
* construction. Typically this will be in the range
* between %GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and
* %GTK_STYLE_PROVIDER_PRIORITY_USER
*
* Adds a global style provider to @screen, which will be used
* in style construction for all #GtkStyleContext<!-- -->s under
* @screen.
*
* GTK+ uses this to make styling information from #GtkSettings
* available.
*
* <note><para>If both priorities are the same, A #GtkStyleProvider
* added through gtk_style_context_add_provider() takes precedence
* over another added through this function.</para></note>
*
* Since: 3.0
**/
void
gtk_style_context_add_provider_for_screen (GdkScreen *screen,
GtkStyleProvider *provider,
guint priority)
{
GList *providers, *list;
g_return_if_fail (GDK_IS_SCREEN (screen));
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
if (G_UNLIKELY (!provider_list_quark))
provider_list_quark = g_quark_from_static_string ("gtk-provider-list-quark");
list = providers = g_object_get_qdata (G_OBJECT (screen), provider_list_quark);
style_provider_add (&list, provider, priority);
if (list != providers)
g_object_set_qdata (G_OBJECT (screen), provider_list_quark, list);
gtk_style_context_reset_widgets (screen);
}
/**
* gtk_style_context_remove_provider_for_screen:
* @screen: a #GdkScreen
* @provider: a #GtkStyleProvider
*
* Removes @provider from the global style providers list in @screen.
*
* Since: 3.0
**/
void
gtk_style_context_remove_provider_for_screen (GdkScreen *screen,
GtkStyleProvider *provider)
{
GList *providers, *list;
g_return_if_fail (GDK_IS_SCREEN (screen));
g_return_if_fail (GTK_IS_STYLE_PROVIDER (provider));
if (G_UNLIKELY (!provider_list_quark))
return;
list = providers = g_object_get_qdata (G_OBJECT (screen), provider_list_quark);
if (style_provider_remove (&list, provider))
{
if (list != providers)
g_object_set_qdata (G_OBJECT (screen), provider_list_quark, list);
gtk_style_context_reset_widgets (screen);
}
}
/**
* gtk_style_context_get_property:
* @context: a #GtkStyleContext
* @property: style property name
* @state: state to retrieve the property value for
* @value: (out) (transfer full): return location for the style property value
*
* Gets a style property from @context for the given state.
*
* When @value is no longer needed, g_value_unset() must be called
* to free any allocated memory.
*
* Since: 3.0
**/
void
gtk_style_context_get_property (GtkStyleContext *context,
const gchar *property,
GtkStateFlags state,
GValue *value)
{
GtkStyleContextPrivate *priv;
StyleData *data;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (property != NULL);
g_return_if_fail (value != NULL);
priv = context->priv;
g_return_if_fail (priv->widget_path != NULL);
data = style_data_lookup (context, state);
gtk_style_properties_get_property (data->store, property, 0, value);
}
void
_gtk_style_context_get_valist (GtkStyleContext *context,
GtkStateFlags state,
GtkStylePropertyContext *property_context,
va_list args)
{
GtkStyleContextPrivate *priv;
StyleData *data;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
g_return_if_fail (priv->widget_path != NULL);
data = style_data_lookup (context, state);
_gtk_style_properties_get_valist (data->store, 0, property_context, args);
}
/**
* gtk_style_context_get_valist:
* @context: a #GtkStyleContext
* @state: state to retrieve the property values for
* @args: va_list of property name/return location pairs, followed by %NULL
*
* Retrieves several style property values from @context for a given state.
*
* Since: 3.0
**/
void
gtk_style_context_get_valist (GtkStyleContext *context,
GtkStateFlags state,
va_list args)
{
GtkStyleContextPrivate *priv;
StyleData *data;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
g_return_if_fail (priv->widget_path != NULL);
data = style_data_lookup (context, state);
gtk_style_properties_get_valist (data->store, 0, args);
}
/**
* gtk_style_context_get:
* @context: a #GtkStyleContext
* @state: state to retrieve the property values for
* @...: property name /return value pairs, followed by %NULL
*
* Retrieves several style property values from @context for a
* given state.
*
* Since: 3.0
**/
void
gtk_style_context_get (GtkStyleContext *context,
GtkStateFlags state,
...)
{
GtkStyleContextPrivate *priv;
StyleData *data;
va_list args;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
g_return_if_fail (priv->widget_path != NULL);
data = style_data_lookup (context, state);
va_start (args, state);
gtk_style_properties_get_valist (data->store, 0, args);
va_end (args);
}
/**
* gtk_style_context_set_state:
* @context: a #GtkStyleContext
* @flags: state to represent
*
* Sets the state to be used when rendering with any
* of the gtk_render_*() functions.
*
* Since: 3.0
**/
void
gtk_style_context_set_state (GtkStyleContext *context,
GtkStateFlags flags)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
info = priv->info_stack->data;
info->state_flags = flags;
}
/**
* gtk_style_context_get_state:
* @context: a #GtkStyleContext
*
* Returns the state used when rendering.
*
* Returns: the state flags
*
* Since: 3.0
**/
GtkStateFlags
gtk_style_context_get_state (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0);
priv = context->priv;
info = priv->info_stack->data;
return info->state_flags;
}
static gboolean
context_has_animatable_region (GtkStyleContext *context,
gpointer region_id)
{
GtkStyleContextPrivate *priv;
/* NULL region_id means everything
* rendered through the style context
*/
if (!region_id)
return TRUE;
priv = context->priv;
return g_slist_find (priv->animation_regions, region_id) != NULL;
}
/**
* gtk_style_context_state_is_running:
* @context: a #GtkStyleContext
* @state: a widget state
* @progress: (out): return location for the transition progress
*
* Returns %TRUE if there is a transition animation running for the
* current region (see gtk_style_context_push_animatable_region()).
*
* If @progress is not %NULL, the animation progress will be returned
* there, 0.0 means the state is closest to being unset, while 1.0 means
* it's closest to being set. This means transition animation will
* run from 0 to 1 when @state is being set and from 1 to 0 when
* it's being unset.
*
* Returns: %TRUE if there is a running transition animation for @state.
*
* Since: 3.0
**/
gboolean
gtk_style_context_state_is_running (GtkStyleContext *context,
GtkStateType state,
gdouble *progress)
{
GtkStyleContextPrivate *priv;
AnimationInfo *info;
GSList *l;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
priv = context->priv;
for (l = priv->animations; l; l = l->next)
{
info = l->data;
if (info->state == state &&
context_has_animatable_region (context, info->region_id))
{
if (progress)
*progress = _gtk_timeline_get_progress (info->timeline);
return TRUE;
}
}
return FALSE;
}
/**
* gtk_style_context_set_path:
* @context: a #GtkStyleContext
* @path: a #GtkWidgetPath
*
* Sets the #GtkWidgetPath used for style matching. As a
* consequence, the style will be regenerated to match
* the new given path.
*
* If you are using a #GtkStyleContext returned from
* gtk_widget_get_style_context(), you do not need to call
* this yourself.
*
* Since: 3.0
**/
void
gtk_style_context_set_path (GtkStyleContext *context,
GtkWidgetPath *path)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (path != NULL);
priv = context->priv;
if (priv->widget_path)
{
gtk_widget_path_free (priv->widget_path);
priv->widget_path = NULL;
}
if (path)
priv->widget_path = gtk_widget_path_copy (path);
gtk_style_context_invalidate (context);
}
/**
* gtk_style_context_get_path:
* @context: a #GtkStyleContext
*
* Returns the widget path used for style matching.
*
* Returns: (transfer none): A #GtkWidgetPath
*
* Since: 3.0
**/
const GtkWidgetPath *
gtk_style_context_get_path (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
priv = context->priv;
return priv->widget_path;
}
/**
* gtk_style_context_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
* <ulink url="http://www.w3.org/TR/css3-cascade/#inheritance>
* inheritance</ulink> 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)
g_object_ref (parent);
if (priv->parent)
g_object_unref (priv->parent);
priv->parent = parent;
g_object_notify (G_OBJECT (context), "parent");
gtk_style_context_invalidate (context);
}
/**
* 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;
GtkStyleInfo *info;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
g_assert (priv->info_stack != NULL);
info = style_info_copy (priv->info_stack->data);
priv->info_stack = g_slist_prepend (priv->info_stack, info);
}
/**
* gtk_style_context_restore:
* @context: a #GtkStyleContext
*
* Restores @context state to a previous stage.
* See gtk_style_context_save().
*
* Since: 3.0
**/
void
gtk_style_context_restore (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
if (priv->info_stack)
{
info = priv->info_stack->data;
priv->info_stack = g_slist_remove (priv->info_stack, info);
style_info_free (info);
}
if (!priv->info_stack)
{
g_warning ("Unpaired gtk_style_context_restore() call");
/* Create default region */
info = style_info_new ();
priv->info_stack = g_slist_prepend (priv->info_stack, info);
}
priv->current_data = NULL;
}
static gboolean
style_class_find (GArray *array,
GQuark class_quark,
guint *position)
{
gint min, max, mid;
gboolean found = FALSE;
guint pos;
if (position)
*position = 0;
if (!array || array->len == 0)
return FALSE;
min = 0;
max = array->len - 1;
do
{
GQuark item;
mid = (min + max) / 2;
item = g_array_index (array, GQuark, mid);
if (class_quark == item)
{
found = TRUE;
pos = mid;
}
else if (class_quark > item)
min = pos = mid + 1;
else
{
max = mid - 1;
pos = mid;
}
}
while (!found && min <= max);
if (position)
*position = pos;
return found;
}
static gboolean
region_find (GArray *array,
GQuark class_quark,
guint *position)
{
gint min, max, mid;
gboolean found = FALSE;
guint pos;
if (position)
*position = 0;
if (!array || array->len == 0)
return FALSE;
min = 0;
max = array->len - 1;
do
{
GtkRegion *region;
mid = (min + max) / 2;
region = &g_array_index (array, GtkRegion, mid);
if (region->class_quark == class_quark)
{
found = TRUE;
pos = mid;
}
else if (region->class_quark > class_quark)
min = pos = mid + 1;
else
{
max = mid - 1;
pos = mid;
}
}
while (!found && min <= max);
if (position)
*position = pos;
return found;
}
/**
* gtk_style_context_add_class:
* @context: a #GtkStyleContext
* @class_name: class name to use in styling
*
* Adds a style class to @context, so posterior calls to
* gtk_style_context_get() or any of the gtk_render_*()
* functions will make use of this new class for styling.
*
* In the CSS file format, a #GtkEntry defining an "entry"
* class, would be matched by:
*
* <programlisting>
* GtkEntry.entry { ... }
* </programlisting>
*
* While any widget defining an "entry" class would be
* matched by:
* <programlisting>
* .entry { ... }
* </programlisting>
*
* Since: 3.0
**/
void
gtk_style_context_add_class (GtkStyleContext *context,
const gchar *class_name)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
GQuark class_quark;
guint position;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (class_name != NULL);
priv = context->priv;
class_quark = g_quark_from_string (class_name);
g_assert (priv->info_stack != NULL);
info = priv->info_stack->data;
if (!style_class_find (info->style_classes, class_quark, &position))
{
g_array_insert_val (info->style_classes, position, class_quark);
/* Unset current data, as it likely changed due to the class change */
priv->current_data = NULL;
}
}
/**
* gtk_style_context_remove_class:
* @context: a #GtkStyleContext
* @class_name: class name to remove
*
* Removes @class_name from @context.
*
* Since: 3.0
**/
void
gtk_style_context_remove_class (GtkStyleContext *context,
const gchar *class_name)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
GQuark class_quark;
guint position;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (class_name != NULL);
class_quark = g_quark_try_string (class_name);
if (!class_quark)
return;
priv = context->priv;
g_assert (priv->info_stack != NULL);
info = priv->info_stack->data;
if (style_class_find (info->style_classes, class_quark, &position))
{
g_array_remove_index (info->style_classes, position);
/* Unset current data, as it likely changed due to the class change */
priv->current_data = NULL;
}
}
/**
* gtk_style_context_has_class:
* @context: a #GtkStyleContext
* @class_name: a class name
*
* Returns %TRUE if @context currently has defined the
* given class name
*
* Returns: %TRUE if @context has @class_name defined
*
* Since: 3.0
**/
gboolean
gtk_style_context_has_class (GtkStyleContext *context,
const gchar *class_name)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
GQuark class_quark;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
g_return_val_if_fail (class_name != NULL, FALSE);
class_quark = g_quark_try_string (class_name);
if (!class_quark)
return FALSE;
priv = context->priv;
g_assert (priv->info_stack != NULL);
info = priv->info_stack->data;
if (style_class_find (info->style_classes, class_quark, NULL))
return TRUE;
return FALSE;
}
/**
* gtk_style_context_list_classes:
* @context: a #GtkStyleContext
*
* Returns the list of classes currently defined in @context.
*
* Returns: (transfer container) (element-type utf8): a #GList of
* strings with the currently defined classes. The contents
* of the list are owned by GTK+, but you must free the list
* itself with g_list_free() when you are done with it.
*
* Since: 3.0
**/
GList *
gtk_style_context_list_classes (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
GList *classes = NULL;
guint i;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
priv = context->priv;
g_assert (priv->info_stack != NULL);
info = priv->info_stack->data;
for (i = 0; i < info->style_classes->len; i++)
{
GQuark quark;
quark = g_array_index (info->style_classes, GQuark, i);
classes = g_list_prepend (classes, (gchar *) g_quark_to_string (quark));
}
return classes;
}
/**
* gtk_style_context_list_regions:
* @context: a #GtkStyleContext
*
* Returns the list of regions currently defined in @context.
*
* Returns: (transfer container) (element-type utf8): a #GList of
* strings with the currently defined regions. The contents
* of the list are owned by GTK+, but you must free the list
* itself with g_list_free() when you are done with it.
*
* Since: 3.0
**/
GList *
gtk_style_context_list_regions (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
GList *classes = NULL;
guint i;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
priv = context->priv;
g_assert (priv->info_stack != NULL);
info = priv->info_stack->data;
for (i = 0; i < info->regions->len; i++)
{
GtkRegion *region;
const gchar *class_name;
region = &g_array_index (info->regions, GtkRegion, i);
class_name = g_quark_to_string (region->class_quark);
classes = g_list_prepend (classes, (gchar *) class_name);
}
return classes;
}
gboolean
_gtk_style_context_check_region_name (const gchar *str)
{
g_return_val_if_fail (str != NULL, FALSE);
if (!g_ascii_islower (str[0]))
return FALSE;
while (*str)
{
if (*str != '-' &&
!g_ascii_islower (*str))
return FALSE;
str++;
}
return TRUE;
}
/**
* gtk_style_context_add_region:
* @context: a #GtkStyleContext
* @region_name: region name to use in styling
* @flags: flags that apply to the region
*
* Adds a region to @context, so posterior calls to
* gtk_style_context_get() or any of the gtk_render_*()
* functions will make use of this new region for styling.
*
* In the CSS file format, a #GtkTreeView defining a "row"
* region, would be matched by:
*
* <programlisting>
* GtkTreeView row { ... }
* </programlisting>
*
* Pseudo-classes are used for matching @flags, so the two
* following rules:
* <programlisting>
* GtkTreeView row:nth-child(even) { ... }
* GtkTreeView row:nth-child(odd) { ... }
* </programlisting>
*
* would apply to even and odd rows, respectively.
*
* <note><para>Region names must only contain lowercase letters
* and '-', starting always with a lowercase letter.</para></note>
*
* Since: 3.0
**/
void
gtk_style_context_add_region (GtkStyleContext *context,
const gchar *region_name,
GtkRegionFlags flags)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
GQuark region_quark;
guint position;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (region_name != NULL);
g_return_if_fail (_gtk_style_context_check_region_name (region_name));
priv = context->priv;
region_quark = g_quark_from_string (region_name);
g_assert (priv->info_stack != NULL);
info = priv->info_stack->data;
if (!region_find (info->regions, region_quark, &position))
{
GtkRegion region;
region.class_quark = region_quark;
region.flags = flags;
g_array_insert_val (info->regions, position, region);
/* Unset current data, as it likely changed due to the region change */
priv->current_data = NULL;
}
}
/**
* gtk_style_context_remove_region:
* @context: a #GtkStyleContext
* @region_name: region name to unset
*
* Removes a region from @context.
*
* Since: 3.0
**/
void
gtk_style_context_remove_region (GtkStyleContext *context,
const gchar *region_name)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
GQuark region_quark;
guint position;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (region_name != NULL);
region_quark = g_quark_try_string (region_name);
if (!region_quark)
return;
priv = context->priv;
g_assert (priv->info_stack != NULL);
info = priv->info_stack->data;
if (region_find (info->regions, region_quark, &position))
{
g_array_remove_index (info->regions, position);
/* Unset current data, as it likely changed due to the region change */
priv->current_data = NULL;
}
}
/**
* gtk_style_context_has_region:
* @context: a #GtkStyleContext
* @region_name: a region name
* @flags_return: (out) (allow-none): return location for region flags
*
* Returns %TRUE if @context has the region defined.
* If @flags_return is not %NULL, it is set to the flags
* affecting the region.
*
* Returns: %TRUE if region is defined
*
* Since: 3.0
**/
gboolean
gtk_style_context_has_region (GtkStyleContext *context,
const gchar *region_name,
GtkRegionFlags *flags_return)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
GQuark region_quark;
guint position;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), FALSE);
g_return_val_if_fail (region_name != NULL, FALSE);
if (flags_return)
*flags_return = 0;
region_quark = g_quark_try_string (region_name);
if (!region_quark)
return FALSE;
priv = context->priv;
g_assert (priv->info_stack != NULL);
info = priv->info_stack->data;
if (region_find (info->regions, region_quark, &position))
{
if (flags_return)
{
GtkRegion *region;
region = &g_array_index (info->regions, GtkRegion, position);
*flags_return = region->flags;
}
return TRUE;
}
return FALSE;
}
static gint
style_property_values_cmp (gconstpointer bsearch_node1,
gconstpointer bsearch_node2)
{
const PropertyValue *val1 = bsearch_node1;
const PropertyValue *val2 = bsearch_node2;
if (val1->widget_type != val2->widget_type)
return val1->widget_type < val2->widget_type ? -1 : 1;
if (val1->pspec != val2->pspec)
return val1->pspec < val2->pspec ? -1 : 1;
if (val1->state != val2->state)
return val1->state < val2->state ? -1 : 1;
return 0;
}
const GValue *
_gtk_style_context_peek_style_property (GtkStyleContext *context,
GType widget_type,
GtkStateFlags state,
GParamSpec *pspec)
{
GtkStyleContextPrivate *priv;
PropertyValue *pcache, key = { 0 };
GList *global_list = NULL;
StyleData *data;
guint i;
priv = context->priv;
data = style_data_lookup (context, 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->screen)
{
global_list = g_object_get_qdata (G_OBJECT (priv->screen), provider_list_quark);
global_list = g_list_last (global_list);
}
if (priv->widget_path)
{
GList *list, *global, *elem;
list = priv->providers_last;
global = global_list;
while ((elem = find_next_candidate (list, global, FALSE)) != NULL)
{
GtkStyleProviderData *provider_data;
provider_data = elem->data;
if (elem == list)
list = list->prev;
else
global = global->prev;
if (gtk_style_provider_get_style_property (provider_data->provider,
priv->widget_path, state,
pspec, &pcache->value))
{
/* Resolve symbolic colors to GdkColor/GdkRGBA */
if (G_VALUE_TYPE (&pcache->value) == GTK_TYPE_SYMBOLIC_COLOR)
{
GtkSymbolicColor *color;
GdkRGBA rgba;
color = g_value_dup_boxed (&pcache->value);
g_value_unset (&pcache->value);
if (G_PARAM_SPEC_VALUE_TYPE (pspec) == GDK_TYPE_RGBA)
g_value_init (&pcache->value, GDK_TYPE_RGBA);
else
g_value_init (&pcache->value, GDK_TYPE_COLOR);
if (gtk_symbolic_color_resolve (color, data->store, &rgba))
{
if (G_PARAM_SPEC_VALUE_TYPE (pspec) == GDK_TYPE_RGBA)
g_value_set_boxed (&pcache->value, &rgba);
else
{
GdkColor rgb;
rgb.red = rgba.red * 65535. + 0.5;
rgb.green = rgba.green * 65535. + 0.5;
rgb.blue = rgba.blue * 65535. + 0.5;
g_value_set_boxed (&pcache->value, &rgb);
}
}
else
g_param_value_set_default (pspec, &pcache->value);
gtk_symbolic_color_unref (color);
}
return &pcache->value;
}
}
}
/* not supplied by any provider, revert to default */
g_param_value_set_default (pspec, &pcache->value);
return &pcache->value;
}
/**
* gtk_style_context_get_style_property:
* @context: a #GtkStyleContext
* @property_name: the name of the widget style property
* @value: Return location for the property value
*
* Gets the value for a widget style property.
*
* When @value is no longer needed, g_value_unset() must be called
* to free any allocated memory.
**/
void
gtk_style_context_get_style_property (GtkStyleContext *context,
const gchar *property_name,
GValue *value)
{
GtkStyleContextPrivate *priv;
GtkWidgetClass *widget_class;
GtkStateFlags state;
GParamSpec *pspec;
const GValue *peek_value;
GType widget_type;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (property_name != NULL);
g_return_if_fail (value != NULL);
priv = context->priv;
if (!priv->widget_path)
return;
widget_type = gtk_widget_path_get_object_type (priv->widget_path);
if (!g_type_is_a (widget_type, GTK_TYPE_WIDGET))
{
g_warning ("%s: can't get style properties for non-widget class `%s'",
G_STRLOC,
g_type_name (widget_type));
return;
}
widget_class = g_type_class_ref (widget_type);
pspec = gtk_widget_class_find_style_property (widget_class, property_name);
g_type_class_unref (widget_class);
if (!pspec)
{
g_warning ("%s: widget class `%s' has no style property named `%s'",
G_STRLOC,
g_type_name (widget_type),
property_name);
return;
}
state = gtk_style_context_get_state (context);
peek_value = _gtk_style_context_peek_style_property (context, widget_type,
state, pspec);
if (G_VALUE_TYPE (value) == G_VALUE_TYPE (peek_value))
g_value_copy (peek_value, value);
else if (g_value_type_transformable (G_VALUE_TYPE (peek_value), G_VALUE_TYPE (value)))
g_value_transform (peek_value, value);
else
g_warning ("can't retrieve style property `%s' of type `%s' as value of type `%s'",
pspec->name,
G_VALUE_TYPE_NAME (peek_value),
G_VALUE_TYPE_NAME (value));
}
/**
* gtk_style_context_get_style_valist:
* @context: a #GtkStyleContext
* @args: va_list of property name/return location pairs, followed by %NULL
*
* Retrieves several widget style properties from @context according to the
* current style.
*
* Since: 3.0
**/
void
gtk_style_context_get_style_valist (GtkStyleContext *context,
va_list args)
{
GtkStyleContextPrivate *priv;
const gchar *prop_name;
GtkStateFlags state;
GType widget_type;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
prop_name = va_arg (args, const gchar *);
priv = context->priv;
if (!priv->widget_path)
return;
widget_type = gtk_widget_path_get_object_type (priv->widget_path);
if (!g_type_is_a (widget_type, GTK_TYPE_WIDGET))
{
g_warning ("%s: can't get style properties for non-widget class `%s'",
G_STRLOC,
g_type_name (widget_type));
return;
}
state = gtk_style_context_get_state (context);
while (prop_name)
{
GtkWidgetClass *widget_class;
GParamSpec *pspec;
const GValue *peek_value;
gchar *error;
widget_class = g_type_class_ref (widget_type);
pspec = gtk_widget_class_find_style_property (widget_class, prop_name);
g_type_class_unref (widget_class);
if (!pspec)
{
g_warning ("%s: widget class `%s' has no style property named `%s'",
G_STRLOC,
g_type_name (widget_type),
prop_name);
continue;
}
peek_value = _gtk_style_context_peek_style_property (context, widget_type,
state, pspec);
G_VALUE_LCOPY (peek_value, args, 0, &error);
if (error)
{
g_warning ("can't retrieve style property `%s' of type `%s': %s",
pspec->name,
G_VALUE_TYPE_NAME (peek_value),
error);
g_free (error);
}
prop_name = va_arg (args, const gchar *);
}
}
/**
* gtk_style_context_get_style:
* @context: a #GtkStyleContext
* @...: property name /return value pairs, followed by %NULL
*
* Retrieves several widget style properties from @context according to the
* current style.
*
* Since: 3.0
**/
void
gtk_style_context_get_style (GtkStyleContext *context,
...)
{
va_list args;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
va_start (args, context);
gtk_style_context_get_style_valist (context, args);
va_end (args);
}
/**
* gtk_style_context_lookup_icon_set:
* @context: a #GtkStyleContext
* @stock_id: an icon name
*
* Looks up @stock_id in the icon factories associated to @context and
* the default icon factory, returning an icon set if found, otherwise
* %NULL.
*
* Returns: (transfer none): The looked up %GtkIconSet, or %NULL
**/
GtkIconSet *
gtk_style_context_lookup_icon_set (GtkStyleContext *context,
const gchar *stock_id)
{
GtkStyleContextPrivate *priv;
StyleData *data;
GSList *list;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
g_return_val_if_fail (stock_id != NULL, NULL);
priv = context->priv;
g_return_val_if_fail (priv->widget_path != NULL, NULL);
data = style_data_lookup (context, 0);
for (list = data->icon_factories; list; list = list->next)
{
GtkIconFactory *factory;
GtkIconSet *icon_set;
factory = list->data;
icon_set = gtk_icon_factory_lookup (factory, stock_id);
if (icon_set)
return icon_set;
}
return gtk_icon_factory_lookup_default (stock_id);
}
/**
* gtk_style_context_set_screen:
* @context: a #GtkStyleContext
* @screen: a #GdkScreen
*
* Attaches @context to the given screen.
*
* The screen is used to add style information from 'global' style
* providers, such as the screens #GtkSettings instance.
*
* If you are using a #GtkStyleContext returned from
* gtk_widget_get_style_context(), you do not need to
* call this yourself.
*
* Since: 3.0
**/
void
gtk_style_context_set_screen (GtkStyleContext *context,
GdkScreen *screen)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GDK_IS_SCREEN (screen));
priv = context->priv;
if (priv->screen == screen)
return;
priv->screen = screen;
g_object_notify (G_OBJECT (context), "screen");
gtk_style_context_invalidate (context);
}
/**
* gtk_style_context_get_screen:
* @context: a #GtkStyleContext
*
* Returns the #GdkScreen to which @context is attached.
*
* Returns: (transfer none): a #GdkScreen.
**/
GdkScreen *
gtk_style_context_get_screen (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
priv = context->priv;
return priv->screen;
}
/**
* gtk_style_context_set_direction:
* @context: a #GtkStyleContext
* @direction: the new direction.
*
* Sets the reading direction for rendering purposes.
*
* If you are using a #GtkStyleContext returned from
* gtk_widget_get_style_context(), you do not need to
* call this yourself.
*
* Since: 3.0
**/
void
gtk_style_context_set_direction (GtkStyleContext *context,
GtkTextDirection direction)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
priv->direction = direction;
g_object_notify (G_OBJECT (context), "direction");
}
/**
* gtk_style_context_get_direction:
* @context: a #GtkStyleContext
*
* Returns the widget direction used for rendering.
*
* Returns: the widget direction
*
* Since: 3.0
**/
GtkTextDirection
gtk_style_context_get_direction (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), GTK_TEXT_DIR_LTR);
priv = context->priv;
return priv->direction;
}
/**
* gtk_style_context_set_junction_sides:
* @context: a #GtkStyleContext
* @sides: sides where rendered elements are visually connected to
* other elements
*
* Sets the sides where rendered elements (mostly through
* gtk_render_frame()) will visually connect with other visual elements.
*
* This is merely a hint that may or may not be honored
* by theming engines.
*
* Container widgets are expected to set junction hints as appropriate
* for their children, so it should not normally be necessary to call
* this function manually.
*
* Since: 3.0
**/
void
gtk_style_context_set_junction_sides (GtkStyleContext *context,
GtkJunctionSides sides)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
info = priv->info_stack->data;
info->junction_sides = sides;
}
/**
* gtk_style_context_get_junction_sides:
* @context: a #GtkStyleContext
*
* Returns the sides where rendered elements connect visually with others.
*
* Returns: the junction sides
*
* Since: 3.0
**/
GtkJunctionSides
gtk_style_context_get_junction_sides (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
GtkStyleInfo *info;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), 0);
priv = context->priv;
info = priv->info_stack->data;
return info->junction_sides;
}
static GtkSymbolicColor *
gtk_style_context_color_lookup_func (gpointer contextp,
const char *name)
{
GtkSymbolicColor *sym_color;
GtkStyleContext *context = contextp;
GtkStyleContextPrivate *priv = context->priv;
GList *elem, *list, *global_list = NULL;
list = priv->providers_last;
if (priv->screen)
{
global_list = g_object_get_qdata (G_OBJECT (priv->screen), provider_list_quark);
global_list = g_list_last (global_list);
}
sym_color = NULL;
while (sym_color == NULL &&
(elem = find_next_candidate (list, global_list, FALSE)) != NULL)
{
GtkStyleProviderData *data;
data = elem->data;
if (elem == list)
list = list->prev;
else
global_list = global_list->prev;
if (GTK_IS_STYLE_PROVIDER_PRIVATE (data->provider))
{
sym_color = _gtk_style_provider_private_get_color (GTK_STYLE_PROVIDER_PRIVATE (data->provider),
name);
}
else
{
/* If somebody hits this code path, shout at them */
sym_color = NULL;
}
}
return sym_color;
}
/**
* 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)
{
GtkSymbolicColor *sym_color;
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);
sym_color = gtk_style_context_color_lookup_func (context, color_name);
if (sym_color == NULL)
return FALSE;
return _gtk_symbolic_color_resolve_full (sym_color,
gtk_style_context_color_lookup_func,
context,
color);
}
/**
* gtk_style_context_notify_state_change:
* @context: a #GtkStyleContext
* @window: a #GdkWindow
* @region_id: (allow-none): animatable region to notify on, or %NULL.
* See gtk_style_context_push_animatable_region()
* @state: state to trigger transition for
* @state_value: %TRUE if @state is the state we are changing to,
* %FALSE if we are changing away from it
*
* Notifies a state change on @context, so if the current style makes use
* of transition animations, one will be started so all rendered elements
* under @region_id are animated for state @state being set to value
* @state_value.
*
* The @window parameter is used in order to invalidate the rendered area
* as the animation runs, so make sure it is the same window that is being
* rendered on by the gtk_render_*() functions.
*
* If @region_id is %NULL, all rendered elements using @context will be
* affected by this state transition.
*
* As a practical example, a #GtkButton notifying a state transition on
* the prelight state:
* <programlisting>
* gtk_style_context_notify_state_change (context,
* gtk_widget_get_window (widget),
* NULL,
* GTK_STATE_PRELIGHT,
* button->in_button);
* </programlisting>
*
* Can be handled in the CSS file like this:
* <programlisting>
* GtkButton {
* background-color: &num;f00
* }
*
* GtkButton:hover {
* background-color: &num;fff;
* transition: 200ms linear
* }
* </programlisting>
*
* This combination will animate the button background from red to white
* if a pointer enters the button, and back to red if the pointer leaves
* the button.
*
* Note that @state is used when finding the transition parameters, which
* is why the style places the transition under the :hover pseudo-class.
*
* Since: 3.0
**/
void
gtk_style_context_notify_state_change (GtkStyleContext *context,
GdkWindow *window,
gpointer region_id,
GtkStateType state,
gboolean state_value)
{
GtkStyleContextPrivate *priv;
GtkAnimationDescription *desc;
AnimationInfo *info;
GtkStateFlags flags;
StyleData *data;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GDK_IS_WINDOW (window));
g_return_if_fail (state > GTK_STATE_NORMAL && state <= GTK_STATE_FOCUSED);
priv = context->priv;
g_return_if_fail (priv->widget_path != NULL);
state_value = (state_value == TRUE);
switch (state)
{
case GTK_STATE_ACTIVE:
flags = GTK_STATE_FLAG_ACTIVE;
break;
case GTK_STATE_PRELIGHT:
flags = GTK_STATE_FLAG_PRELIGHT;
break;
case GTK_STATE_SELECTED:
flags = GTK_STATE_FLAG_SELECTED;
break;
case GTK_STATE_INSENSITIVE:
flags = GTK_STATE_FLAG_INSENSITIVE;
break;
case GTK_STATE_INCONSISTENT:
flags = GTK_STATE_FLAG_INCONSISTENT;
break;
case GTK_STATE_FOCUSED:
flags = GTK_STATE_FLAG_FOCUSED;
break;
case GTK_STATE_NORMAL:
default:
flags = 0;
break;
}
/* Find out if there is any animation description for the given
* state, it will fallback to the normal state as well if necessary.
*/
data = style_data_lookup (context, flags);
gtk_style_properties_get (data->store, 0,
"transition", &desc,
NULL);
if (!desc)
return;
if (_gtk_animation_description_get_duration (desc) == 0)
{
_gtk_animation_description_unref (desc);
return;
}
info = animation_info_lookup (context, region_id, state);
if (info &&
info->target_value != state_value)
{
/* Target values are the opposite */
if (!_gtk_timeline_get_loop (info->timeline))
{
/* Reverse the animation */
if (_gtk_timeline_get_direction (info->timeline) == GTK_TIMELINE_DIRECTION_FORWARD)
_gtk_timeline_set_direction (info->timeline, GTK_TIMELINE_DIRECTION_BACKWARD);
else
_gtk_timeline_set_direction (info->timeline, GTK_TIMELINE_DIRECTION_FORWARD);
info->target_value = state_value;
}
else
{
/* Take it out of its looping state */
_gtk_timeline_set_loop (info->timeline, FALSE);
}
}
else if (!info &&
(!_gtk_animation_description_get_loop (desc) ||
state_value))
{
info = animation_info_new (context, region_id,
_gtk_animation_description_get_duration (desc),
_gtk_animation_description_get_progress_type (desc),
_gtk_animation_description_get_loop (desc),
state, state_value, window);
priv->animations = g_slist_prepend (priv->animations, info);
priv->animations_invalidated = TRUE;
}
_gtk_animation_description_unref (desc);
}
/**
* gtk_style_context_cancel_animations:
* @context: a #GtkStyleContext
* @region_id: (allow-none): animatable region to stop, or %NULL.
* See gtk_style_context_push_animatable_region()
*
* Stops all running animations for @region_id and all animatable
* regions underneath.
*
* A %NULL @region_id will stop all ongoing animations in @context,
* when dealing with a #GtkStyleContext obtained through
* gtk_widget_get_style_context(), this is normally done for you
* in all circumstances you would expect all widget to be stopped,
* so this should be only used in complex widgets with different
* animatable regions.
*
* Since: 3.0
**/
void
gtk_style_context_cancel_animations (GtkStyleContext *context,
gpointer region_id)
{
GtkStyleContextPrivate *priv;
AnimationInfo *info;
GSList *l;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
l = priv->animations;
while (l)
{
info = l->data;
l = l->next;
if (!region_id ||
info->region_id == region_id ||
g_slist_find (info->parent_regions, region_id))
{
priv->animations = g_slist_remove (priv->animations, info);
animation_info_free (info);
}
}
}
static gboolean
is_parent_of (GdkWindow *parent,
GdkWindow *child)
{
GtkWidget *child_widget, *parent_widget;
GdkWindow *window;
gdk_window_get_user_data (child, (gpointer *) &child_widget);
gdk_window_get_user_data (parent, (gpointer *) &parent_widget);
if (child_widget != parent_widget &&
!gtk_widget_is_ancestor (child_widget, parent_widget))
return FALSE;
window = child;
while (window)
{
if (window == parent)
return TRUE;
window = gdk_window_get_parent (window);
}
return FALSE;
}
/**
* gtk_style_context_scroll_animations:
* @context: a #GtkStyleContext
* @window: a #GdkWindow used previously in
* gtk_style_context_notify_state_change()
* @dx: Amount to scroll in the X axis
* @dy: Amount to scroll in the Y axis
*
* This function is analogous to gdk_window_scroll(), and
* should be called together with it so the invalidation
* areas for any ongoing animation are scrolled together
* with it.
*
* Since: 3.0
**/
void
gtk_style_context_scroll_animations (GtkStyleContext *context,
GdkWindow *window,
gint dx,
gint dy)
{
GtkStyleContextPrivate *priv;
AnimationInfo *info;
GSList *l;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GDK_IS_WINDOW (window));
priv = context->priv;
l = priv->animations;
while (l)
{
info = l->data;
l = l->next;
if (info->invalidation_region &&
(window == info->window ||
is_parent_of (window, info->window)))
cairo_region_translate (info->invalidation_region, dx, dy);
}
}
/**
* gtk_style_context_push_animatable_region:
* @context: a #GtkStyleContext
* @region_id: unique identifier for the animatable region
*
* Pushes an animatable region, so all further gtk_render_*() calls between
* this call and the following gtk_style_context_pop_animatable_region()
* will potentially show transition animations for this region if
* gtk_style_context_notify_state_change() is called for a given state,
* and the current theme/style defines transition animations for state
* changes.
*
* The @region_id used must be unique in @context so the theming engine
* can uniquely identify rendered elements subject to a state transition.
*
* Since: 3.0
**/
void
gtk_style_context_push_animatable_region (GtkStyleContext *context,
gpointer region_id)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (region_id != NULL);
priv = context->priv;
priv->animation_regions = g_slist_prepend (priv->animation_regions, region_id);
}
/**
* gtk_style_context_pop_animatable_region:
* @context: a #GtkStyleContext
*
* Pops an animatable region from @context.
* See gtk_style_context_push_animatable_region().
*
* Since: 3.0
**/
void
gtk_style_context_pop_animatable_region (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
priv->animation_regions = g_slist_delete_link (priv->animation_regions,
priv->animation_regions);
}
void
_gtk_style_context_invalidate_animation_areas (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
GSList *l;
priv = context->priv;
for (l = priv->animations; l; l = l->next)
{
AnimationInfo *info;
info = l->data;
/* A NULL invalidation region means it has to be recreated on
* the next expose event, this happens usually after a widget
* allocation change, so the next expose after it will update
* the invalidation region.
*/
if (info->invalidation_region)
{
cairo_region_destroy (info->invalidation_region);
info->invalidation_region = NULL;
}
}
priv->animations_invalidated = TRUE;
}
void
_gtk_style_context_coalesce_animation_areas (GtkStyleContext *context,
GtkWidget *widget)
{
GtkStyleContextPrivate *priv;
GSList *l;
priv = context->priv;
if (!priv->animations_invalidated)
return;
l = priv->animations;
while (l)
{
AnimationInfo *info;
gint rel_x, rel_y;
GSList *cur;
guint i;
cur = l;
info = cur->data;
l = l->next;
if (info->invalidation_region)
continue;
if (info->rectangles->len == 0)
continue;
info->invalidation_region = cairo_region_create ();
_gtk_widget_get_translation_to_window (widget, info->window, &rel_x, &rel_y);
for (i = 0; i < info->rectangles->len; i++)
{
cairo_rectangle_int_t *rect;
rect = &g_array_index (info->rectangles, cairo_rectangle_int_t, i);
/* These are widget relative coordinates,
* so have them inverted to be window relative
*/
rect->x -= rel_x;
rect->y -= rel_y;
cairo_region_union_rectangle (info->invalidation_region, rect);
}
g_array_remove_range (info->rectangles, 0, info->rectangles->len);
}
priv->animations_invalidated = FALSE;
}
static void
store_animation_region (GtkStyleContext *context,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GSList *l;
priv = context->priv;
if (!priv->animations_invalidated)
return;
for (l = priv->animations; l; l = l->next)
{
AnimationInfo *info;
info = l->data;
/* The animation doesn't need updating
* the invalidation area, bail out.
*/
if (info->invalidation_region)
continue;
if (context_has_animatable_region (context, info->region_id))
{
cairo_rectangle_int_t rect;
rect.x = (gint) x;
rect.y = (gint) y;
rect.width = (gint) width;
rect.height = (gint) height;
g_array_append_val (info->rectangles, rect);
if (!info->parent_regions)
{
GSList *parent_regions;
parent_regions = g_slist_find (priv->animation_regions, info->region_id);
info->parent_regions = g_slist_copy (parent_regions);
}
}
}
}
/**
* gtk_style_context_invalidate:
* @context: a #GtkStyleContext.
*
* Invalidates @context style information, so it will be reconstructed
* again.
*
* If you're using a #GtkStyleContext returned from
* gtk_widget_get_style_context(), you do not need to
* call this yourself.
*
* Since: 3.0
**/
void
gtk_style_context_invalidate (GtkStyleContext *context)
{
GtkStyleContextPrivate *priv;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
/* Avoid reentrancy */
if (priv->invalidating_context)
return;
priv->invalidating_context = TRUE;
g_hash_table_remove_all (priv->style_data);
priv->current_data = NULL;
g_signal_emit (context, signals[CHANGED], 0);
priv->invalidating_context = FALSE;
}
/**
* gtk_style_context_set_background:
* @context: a #GtkStyleContext
* @window: a #GdkWindow
*
* Sets the background of @window to the background pattern or
* color specified in @context for its current state.
*
* Since: 3.0
**/
void
gtk_style_context_set_background (GtkStyleContext *context,
GdkWindow *window)
{
GtkStateFlags state;
cairo_pattern_t *pattern;
GdkRGBA *color;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (GDK_IS_WINDOW (window));
state = gtk_style_context_get_state (context);
gtk_style_context_get (context, state,
"background-image", &pattern,
NULL);
if (pattern)
{
gdk_window_set_background_pattern (window, pattern);
cairo_pattern_destroy (pattern);
return;
}
gtk_style_context_get (context, state,
"background-color", &color,
NULL);
if (color)
{
gdk_window_set_background_rgba (window, color);
gdk_rgba_free (color);
}
}
/**
* gtk_style_context_get_color:
* @context: a #GtkStyleContext
* @state: state to retrieve the color for
* @color: (out): return value for the foreground color
*
* Gets the foreground color for a given state.
*
* Since: 3.0
**/
void
gtk_style_context_get_color (GtkStyleContext *context,
GtkStateFlags state,
GdkRGBA *color)
{
GdkRGBA *c;
g_return_if_fail (color != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_get (context,
state,
"color", &c,
NULL);
*color = *c;
gdk_rgba_free (c);
}
/**
* gtk_style_context_get_background_color:
* @context: a #GtkStyleContext
* @state: state to retrieve the color for
* @color: (out): return value for the background color
*
* Gets the background color for a given state.
*
* Since: 3.0
**/
void
gtk_style_context_get_background_color (GtkStyleContext *context,
GtkStateFlags state,
GdkRGBA *color)
{
GdkRGBA *c;
g_return_if_fail (color != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_get (context,
state,
"background-color", &c,
NULL);
*color = *c;
gdk_rgba_free (c);
}
/**
* gtk_style_context_get_border_color:
* @context: a #GtkStyleContext
* @state: state to retrieve the color for
* @color: (out): return value for the border color
*
* Gets the border color for a given state.
*
* Since: 3.0
**/
void
gtk_style_context_get_border_color (GtkStyleContext *context,
GtkStateFlags state,
GdkRGBA *color)
{
GdkRGBA *c;
g_return_if_fail (color != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
gtk_style_context_get (context,
state,
"border-color", &c,
NULL);
*color = *c;
gdk_rgba_free (c);
}
/**
* gtk_style_context_get_border:
* @context: a #GtkStyleContext
* @state: state to retrieve the border for
* @border: (out): return value for the border settings
*
* Gets the border for a given state as a #GtkBorder.
* See %GTK_STYLE_PROPERTY_BORDER_WIDTH.
*
* Since: 3.0
**/
void
gtk_style_context_get_border (GtkStyleContext *context,
GtkStateFlags state,
GtkBorder *border)
{
GtkStyleContextPrivate *priv;
StyleData *data;
int top, left, bottom, right;
GtkBorderStyle border_style;
g_return_if_fail (border != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
g_return_if_fail (priv->widget_path != NULL);
data = style_data_lookup (context, state);
gtk_style_properties_get (data->store,
0,
"border-style", &border_style,
"border-top-width", &top,
"border-top-width", &top,
"border-left-width", &left,
"border-bottom-width", &bottom,
"border-right-width", &right,
NULL);
if (border_style == GTK_BORDER_STYLE_NONE)
{
border->top = 0;
border->left = 0;
border->bottom = 0;
border->right = 0;
}
else
{
border->top = top;
border->left = left;
border->bottom = bottom;
border->right = right;
}
}
/**
* gtk_style_context_get_padding:
* @context: a #GtkStyleContext
* @state: state to retrieve the padding for
* @padding: (out): return value for the padding settings
*
* Gets the padding for a given state as a #GtkBorder.
* See %GTK_STYLE_PROPERTY_PADDING.
*
* Since: 3.0
**/
void
gtk_style_context_get_padding (GtkStyleContext *context,
GtkStateFlags state,
GtkBorder *padding)
{
GtkStyleContextPrivate *priv;
StyleData *data;
int top, left, bottom, right;
g_return_if_fail (padding != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
g_return_if_fail (priv->widget_path != NULL);
data = style_data_lookup (context, state);
gtk_style_properties_get (data->store,
0,
"padding-top", &top,
"padding-left", &left,
"padding-bottom", &bottom,
"padding-right", &right,
NULL);
padding->top = top;
padding->left = left;
padding->bottom = bottom;
padding->right = right;
}
/**
* gtk_style_context_get_margin:
* @context: a #GtkStyleContext
* @state: state to retrieve the border for
* @margin: (out): return value for the margin settings
*
* Gets the margin for a given state as a #GtkBorder.
* See %GTK_STYLE_PROPERTY_MARGIN.
*
* Since: 3.0
**/
void
gtk_style_context_get_margin (GtkStyleContext *context,
GtkStateFlags state,
GtkBorder *margin)
{
GtkStyleContextPrivate *priv;
StyleData *data;
int top, left, bottom, right;
g_return_if_fail (margin != NULL);
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = context->priv;
g_return_if_fail (priv->widget_path != NULL);
data = style_data_lookup (context, state);
gtk_style_properties_get (data->store,
0,
"margin-top", &top,
"margin-left", &left,
"margin-bottom", &bottom,
"margin-right", &right,
NULL);
margin->top = top;
margin->left = left;
margin->bottom = bottom;
margin->right = right;
}
/**
* gtk_style_context_get_font:
* @context: a #GtkStyleContext
* @state: state to retrieve the font for
*
* Returns the font description for a given state. The returned
* object is const and will remain valid until the
* #GtkStyleContext::changed signal happens.
*
* Returns: (transfer none): the #PangoFontDescription for the given
* state. This object is owned by GTK+ and should not be
* freed.
*
* Since: 3.0
**/
const PangoFontDescription *
gtk_style_context_get_font (GtkStyleContext *context,
GtkStateFlags state)
{
GtkStyleContextPrivate *priv;
StyleData *data;
GHashTable *font_cache;
PangoFontDescription *description;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
priv = context->priv;
g_return_val_if_fail (priv->widget_path != NULL, NULL);
data = style_data_lookup (context, state);
/* Yuck, fonts are created on-demand but we don't return a ref.
* Do bad things to achieve this requirement */
font_cache = g_object_get_data (G_OBJECT (data->store), "font-cache-for-get_font");
if (font_cache)
{
description = g_hash_table_lookup (font_cache, GUINT_TO_POINTER (state));
}
else
{
font_cache = g_hash_table_new_full (NULL, NULL, NULL, (GDestroyNotify) pango_font_description_free);
g_object_set_data_full (G_OBJECT (data->store),
"font-cache-for-get_font",
font_cache,
(GDestroyNotify) g_hash_table_unref);
description = NULL;
}
if (description == NULL)
{
gtk_style_properties_get (data->store, 0, "font", &description, NULL);
g_hash_table_insert (font_cache, GUINT_TO_POINTER (state), description);
}
return description;
}
static void
get_cursor_color (GtkStyleContext *context,
gboolean primary,
GdkRGBA *color)
{
GdkColor *style_color;
gtk_style_context_get_style (context,
primary ? "cursor-color" : "secondary-cursor-color",
&style_color,
NULL);
if (style_color)
{
color->red = style_color->red / 65535.0;
color->green = style_color->green / 65535.0;
color->blue = style_color->blue / 65535.0;
color->alpha = 1;
gdk_color_free (style_color);
}
else
{
gtk_style_context_get_color (context, GTK_STATE_FLAG_NORMAL, color);
if (!primary)
{
GdkRGBA bg;
gtk_style_context_get_background_color (context, GTK_STATE_FLAG_NORMAL, &bg);
color->red = (color->red + bg.red) * 0.5;
color->green = (color->green + bg.green) * 0.5;
color->blue = (color->blue + bg.blue) * 0.5;
}
}
}
void
_gtk_style_context_get_cursor_color (GtkStyleContext *context,
GdkRGBA *primary_color,
GdkRGBA *secondary_color)
{
if (primary_color)
get_cursor_color (context, TRUE, primary_color);
if (secondary_color)
get_cursor_color (context, FALSE, secondary_color);
}
/* Paint methods */
/**
* gtk_render_check:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a checkmark (as in a #GtkCheckButton).
*
* The %GTK_STATE_FLAG_ACTIVE state determines whether the check is
* on or off, and %GTK_STATE_FLAG_INCONSISTENT determines whether it
* should be marked as undefined.
*
* <example>
* <title>Typical checkmark rendering</title>
* <inlinegraphic fileref="checks.png" format="PNG"/>
* </example>
*
* Since: 3.0
**/
void
gtk_render_check (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context, x, y, width, height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_check (priv->theming_engine, cr,
x, y, width, height);
cairo_restore (cr);
}
/**
* gtk_render_option:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders an option mark (as in a #GtkRadioButton), the %GTK_STATE_FLAG_ACTIVE
* state will determine whether the option is on or off, and
* %GTK_STATE_FLAG_INCONSISTENT whether it should be marked as undefined.
*
* <example>
* <title>Typical option mark rendering</title>
* <inlinegraphic fileref="options.png" format="PNG"/>
* </example>
*
* Since: 3.0
**/
void
gtk_render_option (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context, x, y, width, height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_option (priv->theming_engine, cr,
x, y, width, height);
cairo_restore (cr);
}
/**
* gtk_render_arrow:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @angle: arrow angle from 0 to 2 * %G_PI, being 0 the arrow pointing to the north
* @x: 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.
*
* <example>
* <title>Typical arrow rendering at 0, 1&solidus;2 &pi;, &pi; and 3&solidus;2 &pi;</title>
* <inlinegraphic fileref="arrows.png" format="PNG"/>
* </example>
*
* Since: 3.0
**/
void
gtk_render_arrow (GtkStyleContext *context,
cairo_t *cr,
gdouble angle,
gdouble x,
gdouble y,
gdouble size)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (size <= 0)
return;
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_ARROW);
store_animation_region (context, x, y, size, size);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_arrow (priv->theming_engine, cr,
angle, x, y, size);
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.
*
* <example>
* <title>Typical background rendering, showing the effect of
* <parameter>background-image</parameter>,
* <parameter>border-width</parameter> and
* <parameter>border-radius</parameter></title>
* <inlinegraphic fileref="background.png" format="PNG"/>
* </example>
*
* Since: 3.0.
**/
void
gtk_render_background (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context, x, y, width, height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_background (priv->theming_engine, cr, x, y, width, height);
cairo_restore (cr);
}
/**
* gtk_render_frame:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a frame around the rectangle defined by @x, @y, @width, @height.
*
* <example>
* <title>Examples of frame rendering, showing the effect of
* <parameter>border-image</parameter>,
* <parameter>border-color</parameter>,
* <parameter>border-width</parameter>,
* <parameter>border-radius</parameter> and
* junctions</title>
* <inlinegraphic fileref="frames.png" format="PNG"/>
* </example>
*
* Since: 3.0
**/
void
gtk_render_frame (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context, x, y, width, height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_frame (priv->theming_engine, cr, x, y, width, height);
cairo_restore (cr);
}
/**
* gtk_render_expander:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders an expander (as used in #GtkTreeView and #GtkExpander) in the area
* defined by @x, @y, @width, @height. The state %GTK_STATE_FLAG_ACTIVE
* determines whether the expander is collapsed or expanded.
*
* <example>
* <title>Typical expander rendering</title>
* <inlinegraphic fileref="expanders.png" format="PNG"/>
* </example>
*
* Since: 3.0
**/
void
gtk_render_expander (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context, x, y, width, height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_expander (priv->theming_engine, cr, x, y, width, height);
cairo_restore (cr);
}
/**
* gtk_render_focus:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a focus indicator on the rectangle determined by @x, @y, @width, @height.
* <example>
* <title>Typical focus rendering</title>
* <inlinegraphic fileref="focus.png" format="PNG"/>
* </example>
*
* Since: 3.0
**/
void
gtk_render_focus (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context, x, y, width, height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_focus (priv->theming_engine, cr, x, y, width, height);
cairo_restore (cr);
}
/**
* gtk_render_layout:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin
* @y: Y origin
* @layout: the #PangoLayout to render
*
* Renders @layout on the coordinates @x, @y
*
* Since: 3.0
**/
void
gtk_render_layout (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
PangoRectangle extents;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (PANGO_IS_LAYOUT (layout));
g_return_if_fail (cr != NULL);
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
pango_layout_get_extents (layout, &extents, NULL);
store_animation_region (context,
x + extents.x,
y + extents.y,
extents.width,
extents.height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_layout (priv->theming_engine, cr, x, y, layout);
cairo_restore (cr);
}
/**
* gtk_render_line:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x0: X coordinate for the origin of the line
* @y0: Y coordinate for the origin of the line
* @x1: X coordinate for the end of the line
* @y1: Y coordinate for the end of the line
*
* Renders a line from (x0, y0) to (x1, y1).
*
* Since: 3.0
**/
void
gtk_render_line (GtkStyleContext *context,
cairo_t *cr,
gdouble x0,
gdouble y0,
gdouble x1,
gdouble y1)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_line (priv->theming_engine, cr, x0, y0, x1, y1);
cairo_restore (cr);
}
/**
* gtk_render_slider:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
* @orientation: orientation of the slider
*
* Renders a slider (as in #GtkScale) in the rectangle defined by @x, @y,
* @width, @height. @orientation defines whether the slider is vertical
* or horizontal.
*
* <example>
* <title>Typical slider rendering</title>
* <inlinegraphic fileref="sliders.png" format="PNG"/>
* </example>
*
* Since: 3.0
**/
void
gtk_render_slider (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkOrientation orientation)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context, x, y, width, height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_slider (priv->theming_engine, cr, x, y, width, height, orientation);
cairo_restore (cr);
}
/**
* gtk_render_frame_gap:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
* @gap_side: side where the gap is
* @xy0_gap: initial coordinate (X or Y depending on @gap_side) for the gap
* @xy1_gap: end coordinate (X or Y depending on @gap_side) for the gap
*
* Renders a frame around the rectangle defined by (@x, @y, @width, @height),
* leaving a gap on one side. @xy0_gap and @xy1_gap will mean X coordinates
* for %GTK_POS_TOP and %GTK_POS_BOTTOM gap sides, and Y coordinates for
* %GTK_POS_LEFT and %GTK_POS_RIGHT.
*
* <example>
* <title>Typical rendering of a frame with a gap</title>
* <inlinegraphic fileref="frame-gap.png" format="PNG"/>
* </example>
*
* Since: 3.0
**/
void
gtk_render_frame_gap (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side,
gdouble xy0_gap,
gdouble xy1_gap)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
g_return_if_fail (xy0_gap <= xy1_gap);
g_return_if_fail (xy0_gap >= 0);
if (width <= 0 || height <= 0)
return;
if (gap_side == GTK_POS_LEFT ||
gap_side == GTK_POS_RIGHT)
g_return_if_fail (xy1_gap <= height);
else
g_return_if_fail (xy1_gap <= width);
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context, x, y, width, height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_frame_gap (priv->theming_engine, cr,
x, y, width, height, gap_side,
xy0_gap, xy1_gap);
cairo_restore (cr);
}
/**
* gtk_render_extension:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
* @gap_side: side where the gap is
*
* Renders a extension (as in a #GtkNotebook tab) in the rectangle
* defined by @x, @y, @width, @height. The side where the extension
* connects to is defined by @gap_side.
*
* <example>
* <title>Typical extension rendering</title>
* <inlinegraphic fileref="extensions.png" format="PNG"/>
* </example>
*
* Since: 3.0
**/
void
gtk_render_extension (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context, x, y, width, height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_extension (priv->theming_engine, cr, x, y, width, height, gap_side);
cairo_restore (cr);
}
/**
* gtk_render_handle:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders a handle (as in #GtkHandleBox, #GtkPaned and
* #GtkWindow<!-- -->'s resize grip), in the rectangle
* determined by @x, @y, @width, @height.
*
* <example>
* <title>Handles rendered for the paned and grip classes</title>
* <inlinegraphic fileref="handles.png" format="PNG"/>
* </example>
*
* Since: 3.0
**/
void
gtk_render_handle (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context, x, y, width, height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_handle (priv->theming_engine, cr, x, y, width, height);
cairo_restore (cr);
}
/**
* gtk_render_activity:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin of the rectangle
* @y: Y origin of the rectangle
* @width: rectangle width
* @height: rectangle height
*
* Renders an activity area (Such as in #GtkSpinner or the
* fill line in #GtkRange), the state %GTK_STATE_FLAG_ACTIVE
* determines whether there is activity going on.
*
* Since: 3.0
**/
void
gtk_render_activity (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
if (width <= 0 || height <= 0)
return;
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context, x, y, width, height);
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_activity (priv->theming_engine, cr, x, y, width, height);
cairo_restore (cr);
}
/**
* gtk_render_icon_pixbuf:
* @context: a #GtkStyleContext
* @source: the #GtkIconSource specifying the icon to render
* @size: (type int): the size to render the icon at. A size of (GtkIconSize) -1
* means render at the size of the source and don't scale.
*
* Renders the icon specified by @source at the given @size, returning the result
* in a pixbuf.
*
* Returns: (transfer full): a newly-created #GdkPixbuf containing the rendered icon
*
* Since: 3.0
**/
GdkPixbuf *
gtk_render_icon_pixbuf (GtkStyleContext *context,
const GtkIconSource *source,
GtkIconSize size)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
g_return_val_if_fail (size > GTK_ICON_SIZE_INVALID || size == -1, NULL);
g_return_val_if_fail (source != NULL, NULL);
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
_gtk_theming_engine_set_context (priv->theming_engine, context);
return engine_class->render_icon_pixbuf (priv->theming_engine, source, size);
}
/**
* gtk_render_icon:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @pixbuf: a #GdkPixbuf containing the icon to draw
* @x: X position for the @pixbuf
* @y: Y position for the @pixbuf
*
* Renders the icon in @pixbuf at the specified @x and @y coordinates.
*
* Since: 3.2
**/
void
gtk_render_icon (GtkStyleContext *context,
cairo_t *cr,
GdkPixbuf *pixbuf,
gdouble x,
gdouble y)
{
GtkStyleContextPrivate *priv;
GtkThemingEngineClass *engine_class;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
priv = context->priv;
engine_class = GTK_THEMING_ENGINE_GET_CLASS (priv->theming_engine);
cairo_save (cr);
store_animation_region (context,
x, y,
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf));
_gtk_theming_engine_set_context (priv->theming_engine, context);
engine_class->render_icon (priv->theming_engine, cr, pixbuf, x, y);
cairo_restore (cr);
}
static 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);
_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
*/
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);
}
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;
}
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