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gtk2/gtk/gtkthemingengine.c

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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 <math.h>
#include <gtk/gtk.h>
#include <gtk/gtkthemingengine.h>
#include <gtk/gtkstylecontext.h>
#include <gtk/gtkintl.h>
#include "gtkprivate.h"
#include "gtk9slice.h"
#include "gtkpango.h"
/**
* SECTION:gtkthemingengine
* @Short_description: Theming renderers
* @Title: GtkThemingEngine
* @See_also: #GtkStyleContext
*
* #GtkThemingEngine is the object used for rendering themed content
* in GTK+ widgets. Even though GTK+ has a default implementation,
* it can be overridden in CSS files by enforcing a #GtkThemingEngine
* object to be loaded as a module.
*
* In order to implement a theming engine, a #GtkThemingEngine subclass
* must be created, alongside the CSS file that will reference it, the
* theming engine would be created as an .so library, and installed in
* $(gtk-modules-dir)/theming-engines/.
*
* #GtkThemingEngine<!-- -->s have limited access to the object they are
* rendering, the #GtkThemingEngine API has read-only accessors to the
* style information contained in the rendered object's #GtkStyleContext.
*/
typedef struct GtkThemingEnginePrivate GtkThemingEnginePrivate;
enum {
SIDE_LEFT = 1,
SIDE_BOTTOM = 1 << 1,
SIDE_RIGHT = 1 << 2,
SIDE_TOP = 1 << 3,
SIDE_ALL = 0xF
};
enum {
PROP_0,
PROP_NAME
};
struct GtkThemingEnginePrivate
{
GtkStyleContext *context;
gchar *name;
};
#define GTK_THEMING_ENGINE_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_THEMING_ENGINE, GtkThemingEnginePrivate))
static void gtk_theming_engine_finalize (GObject *object);
static void gtk_theming_engine_impl_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_theming_engine_impl_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_theming_engine_render_check (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height);
static void gtk_theming_engine_render_option (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height);
static void gtk_theming_engine_render_arrow (GtkThemingEngine *engine,
cairo_t *cr,
gdouble angle,
gdouble x,
gdouble y,
gdouble size);
static void gtk_theming_engine_render_background (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height);
static void gtk_theming_engine_render_frame (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height);
static void gtk_theming_engine_render_expander (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height);
static void gtk_theming_engine_render_focus (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height);
static void gtk_theming_engine_render_layout (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout);
static void gtk_theming_engine_render_line (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x0,
gdouble y0,
gdouble x1,
gdouble y1);
static void gtk_theming_engine_render_slider (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkOrientation orientation);
static void gtk_theming_engine_render_frame_gap (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side,
gdouble xy0_gap,
gdouble xy1_gap);
static void gtk_theming_engine_render_extension (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side);
static void gtk_theming_engine_render_handle (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height);
static void gtk_theming_engine_render_activity (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height);
static GdkPixbuf * gtk_theming_engine_render_icon_pixbuf (GtkThemingEngine *engine,
const GtkIconSource *source,
GtkIconSize size);
G_DEFINE_TYPE (GtkThemingEngine, gtk_theming_engine, G_TYPE_OBJECT)
typedef struct GtkThemingModule GtkThemingModule;
typedef struct GtkThemingModuleClass GtkThemingModuleClass;
struct GtkThemingModule
{
GTypeModule parent_instance;
GModule *module;
gchar *name;
void (*init) (GTypeModule *module);
void (*exit) (void);
GtkThemingEngine * (*create_engine) (void);
};
struct GtkThemingModuleClass
{
GTypeModuleClass parent_class;
};
#define GTK_TYPE_THEMING_MODULE (gtk_theming_module_get_type ())
#define GTK_THEMING_MODULE(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GTK_TYPE_THEMING_MODULE, GtkThemingModule))
#define GTK_IS_THEMING_MODULE(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), GTK_TYPE_THEMING_MODULE))
G_DEFINE_TYPE (GtkThemingModule, gtk_theming_module, G_TYPE_TYPE_MODULE);
static void
gtk_theming_engine_class_init (GtkThemingEngineClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gtk_theming_engine_finalize;
object_class->set_property = gtk_theming_engine_impl_set_property;
object_class->get_property = gtk_theming_engine_impl_get_property;
klass->render_check = gtk_theming_engine_render_check;
klass->render_option = gtk_theming_engine_render_option;
klass->render_arrow = gtk_theming_engine_render_arrow;
klass->render_background = gtk_theming_engine_render_background;
klass->render_frame = gtk_theming_engine_render_frame;
klass->render_expander = gtk_theming_engine_render_expander;
klass->render_focus = gtk_theming_engine_render_focus;
klass->render_layout = gtk_theming_engine_render_layout;
klass->render_line = gtk_theming_engine_render_line;
klass->render_slider = gtk_theming_engine_render_slider;
klass->render_frame_gap = gtk_theming_engine_render_frame_gap;
klass->render_extension = gtk_theming_engine_render_extension;
klass->render_handle = gtk_theming_engine_render_handle;
klass->render_activity = gtk_theming_engine_render_activity;
klass->render_icon_pixbuf = gtk_theming_engine_render_icon_pixbuf;
/**
* GtkThemingEngine:name:
*
* The theming engine name, this name will be used when registering
* custom properties, for a theming engine named "Clearlooks" registering
* a "glossy" custom property, it could be referenced in the CSS file as
*
* <programlisting>
* -Clearlooks-glossy: true;
* </programlisting>
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_NAME,
g_param_spec_string ("name",
P_("Name"),
P_("Theming engine name"),
NULL,
G_PARAM_CONSTRUCT_ONLY | GTK_PARAM_READWRITE));
g_type_class_add_private (object_class, sizeof (GtkThemingEnginePrivate));
}
static void
gtk_theming_engine_init (GtkThemingEngine *engine)
{
engine->priv = GTK_THEMING_ENGINE_GET_PRIVATE (engine);
}
static void
gtk_theming_engine_finalize (GObject *object)
{
GtkThemingEnginePrivate *priv;
priv = GTK_THEMING_ENGINE (object)->priv;
g_free (priv->name);
G_OBJECT_GET_CLASS (gtk_theming_engine_parent_class)->finalize (object);
}
static void
gtk_theming_engine_impl_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkThemingEnginePrivate *priv;
priv = GTK_THEMING_ENGINE (object)->priv;
switch (prop_id)
{
case PROP_NAME:
if (priv->name)
g_free (priv->name);
priv->name = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_theming_engine_impl_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkThemingEnginePrivate *priv;
priv = GTK_THEMING_ENGINE (object)->priv;
switch (prop_id)
{
case PROP_NAME:
g_value_set_string (value, priv->name);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
void
_gtk_theming_engine_set_context (GtkThemingEngine *engine,
GtkStyleContext *context)
{
GtkThemingEnginePrivate *priv;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
priv = engine->priv;
priv->context = context;
}
/**
* gtk_theming_engine_register_property: (skip)
* @name_space: namespace for the property name
* @parse_func: parsing function to use, or %NULL
* @pspec: the #GParamSpec for the new property
*
* Registers a property so it can be used in the CSS file format,
* on the CSS file the property will look like
* "-${@name_space}-${property_name}". being
* ${property_name} the given to @pspec. @name_space will usually
* be the theme engine name.
*
* For any type a @parse_func may be provided, being this function
* used for turning any property value (between ':' and ';') in
* CSS to the #GValue needed. For basic types there is already
* builtin parsing support, so %NULL may be provided for these
* cases.
*
* <note>
* Engines must ensure property registration happens exactly once,
* usually GTK+ deals with theming engines as singletons, so this
* should be guaranteed to happen once, but bear this in mind
* when creating #GtkThemeEngine<!-- -->s yourself.
* </note>
*
* <note>
* In order to make use of the custom registered properties in
* the CSS file, make sure the engine is loaded first by specifying
* the engine property, either in a previous rule or within the same
* one.
* <programlisting>
* &ast; {
* engine: someengine;
* -SomeEngine-custom-property: 2;
* }
* </programlisting>
* </note>
*
* Since: 3.0
**/
void
gtk_theming_engine_register_property (const gchar *name_space,
GtkStylePropertyParser parse_func,
GParamSpec *pspec)
{
gchar *name;
g_return_if_fail (name_space != NULL);
g_return_if_fail (strchr (name_space, ' ') == NULL);
g_return_if_fail (G_IS_PARAM_SPEC (pspec));
/* FIXME: hack hack hack, replacing pspec->name to include namespace */
name = g_strdup_printf ("-%s-%s", name_space, pspec->name);
g_free (pspec->name);
pspec->name = name;
gtk_style_properties_register_property (parse_func, pspec);
}
/**
* gtk_theming_engine_get_property:
* @engine: a #GtkThemingEngine
* @property: the property name
* @state: state to retrieve the value for
* @value: (out) (transfer full): return location for the property value,
* you must free this memory using g_value_unset() once you are
* done with it.
*
* Gets a property value as retrieved from the style settings that apply
* to the currently rendered element.
*
* Since: 3.0
**/
void
gtk_theming_engine_get_property (GtkThemingEngine *engine,
const gchar *property,
GtkStateFlags state,
GValue *value)
{
GtkThemingEnginePrivate *priv;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
g_return_if_fail (property != NULL);
g_return_if_fail (value != NULL);
priv = engine->priv;
gtk_style_context_get_property (priv->context, property, state, value);
}
/**
* gtk_theming_engine_get_valist:
* @engine: a #GtkThemingEngine
* @state: state to retrieve values for
* @args: va_list of property name/return location pairs, followed by %NULL
*
* Retrieves several style property values that apply to the currently
* rendered element.
*
* Since: 3.0
**/
void
gtk_theming_engine_get_valist (GtkThemingEngine *engine,
GtkStateFlags state,
va_list args)
{
GtkThemingEnginePrivate *priv;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
priv = engine->priv;
gtk_style_context_get_valist (priv->context, state, args);
}
/**
* gtk_theming_engine_get:
* @engine: a #GtkThemingEngine
* @state: state to retrieve values for
* @...: property name /return value pairs, followed by %NULL
*
* Retrieves several style property values that apply to the currently
* rendered element.
*
* Since: 3.0
**/
void
gtk_theming_engine_get (GtkThemingEngine *engine,
GtkStateFlags state,
...)
{
GtkThemingEnginePrivate *priv;
va_list args;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
priv = engine->priv;
va_start (args, state);
gtk_style_context_get_valist (priv->context, state, args);
va_end (args);
}
/**
* gtk_theming_engine_get_style_property:
* @engine: a #GtkThemingEngine
* @property_name: the name of the widget style property
* @value: Return location for the property value, free with
* g_value_unset() after use.
*
* Gets the value for a widget style property.
*
* Since: 3.0
**/
void
gtk_theming_engine_get_style_property (GtkThemingEngine *engine,
const gchar *property_name,
GValue *value)
{
GtkThemingEnginePrivate *priv;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
g_return_if_fail (property_name != NULL);
priv = engine->priv;
gtk_style_context_get_style_property (priv->context, property_name, value);
}
/**
* gtk_theming_engine_get_style_valist:
* @engine: a #GtkThemingEngine
* @args: va_list of property name/return location pairs, followed by %NULL
*
* Retrieves several widget style properties from @engine according to the
* currently rendered content's style.
*
* Since: 3.0
**/
void
gtk_theming_engine_get_style_valist (GtkThemingEngine *engine,
va_list args)
{
GtkThemingEnginePrivate *priv;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
priv = engine->priv;
gtk_style_context_get_style_valist (priv->context, args);
}
/**
* gtk_theming_engine_get_style:
* @engine: a #GtkThemingEngine
* @...: property name /return value pairs, followed by %NULL
*
* Retrieves several widget style properties from @engine according
* to the currently rendered content's style.
*
* Since: 3.0
**/
void
gtk_theming_engine_get_style (GtkThemingEngine *engine,
...)
{
GtkThemingEnginePrivate *priv;
va_list args;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
priv = engine->priv;
va_start (args, engine);
gtk_style_context_get_style_valist (priv->context, args);
va_end (args);
}
/**
* gtk_theming_engine_lookup_color:
* @engine: a #GtkThemingEngine
* @color_name: color name to lookup
* @color: (out): Return location for the looked up color
*
* Looks up and resolves a color name in the current style's color map.
*
* Returns: %TRUE if @color_name was found and resolved, %FALSE otherwise
**/
gboolean
gtk_theming_engine_lookup_color (GtkThemingEngine *engine,
const gchar *color_name,
GdkRGBA *color)
{
GtkThemingEnginePrivate *priv;
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), FALSE);
g_return_val_if_fail (color_name != NULL, FALSE);
priv = engine->priv;
return gtk_style_context_lookup_color (priv->context, color_name, color);
}
/**
* gtk_theming_engine_get_state:
* @engine: a #GtkThemingEngine
*
* returns the state used when rendering.
*
* Returns: the state flags
*
* Since: 3.0
**/
GtkStateFlags
gtk_theming_engine_get_state (GtkThemingEngine *engine)
{
GtkThemingEnginePrivate *priv;
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), 0);
priv = engine->priv;
return gtk_style_context_get_state (priv->context);
}
/**
* gtk_theming_engine_state_is_running:
* @engine: a #GtkThemingEngine
* @state: a widget state
* @progress: (out): return location for the transition progress
*
* Returns %TRUE if there is a transition animation running for the
* current region (see gtk_style_context_push_animatable_region()).
*
* If @progress is not %NULL, the animation progress will be returned
* there, 0.0 means the state is closest to being %FALSE, while 1.0 means
* it's closest to being %TRUE. This means transition animations will
* run from 0 to 1 when @state is being set to %TRUE and from 1 to 0 when
* it's being set to %FALSE.
*
* Returns: %TRUE if there is a running transition animation for @state.
*
* Since: 3.0
**/
gboolean
gtk_theming_engine_state_is_running (GtkThemingEngine *engine,
GtkStateType state,
gdouble *progress)
{
GtkThemingEnginePrivate *priv;
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), FALSE);
priv = engine->priv;
return gtk_style_context_state_is_running (priv->context, state, progress);
}
/**
* gtk_theming_engine_get_path:
* @engine: a #GtkThemingEngine
*
* Returns the widget path used for style matching.
*
* Returns: (transfer none): A #GtkWidgetPath
*
* Since: 3.0
**/
G_CONST_RETURN GtkWidgetPath *
gtk_theming_engine_get_path (GtkThemingEngine *engine)
{
GtkThemingEnginePrivate *priv;
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), NULL);
priv = engine->priv;
return gtk_style_context_get_path (priv->context);
}
/**
* gtk_theming_engine_has_class:
* @engine: a #GtkThemingEngine
* @style_class: class name to look up
*
* Returns %TRUE if the currently rendered contents have
* defined the given class name.
*
* Returns: %TRUE if @engine has @class_name defined
*
* Since: 3.0
**/
gboolean
gtk_theming_engine_has_class (GtkThemingEngine *engine,
const gchar *style_class)
{
GtkThemingEnginePrivate *priv;
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), FALSE);
priv = engine->priv;
return gtk_style_context_has_class (priv->context, style_class);
}
/**
* gtk_theming_engine_has_region:
* @engine: a #GtkThemingEngine
* @style_region: a region name
* @flags: (out) (allow-none): return location for region flags
*
* Returns %TRUE if the currently rendered contents have the
* region defined. If @flags_return is not %NULL, it is set
* to the flags affecting the region.
*
* Returns: %TRUE if region is defined
*
* Since: 3.0
**/
gboolean
gtk_theming_engine_has_region (GtkThemingEngine *engine,
const gchar *style_region,
GtkRegionFlags *flags)
{
GtkThemingEnginePrivate *priv;
if (flags)
*flags = 0;
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), FALSE);
priv = engine->priv;
return gtk_style_context_has_region (priv->context, style_region, flags);
}
/**
* gtk_theming_engine_get_direction:
* @engine: a #GtkThemingEngine
*
* Returns the widget direction used for rendering.
*
* Returns: the widget direction
*
* Since: 3.0
**/
GtkTextDirection
gtk_theming_engine_get_direction (GtkThemingEngine *engine)
{
GtkThemingEnginePrivate *priv;
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), GTK_TEXT_DIR_LTR);
priv = engine->priv;
return gtk_style_context_get_direction (priv->context);
}
/**
* gtk_theming_engine_get_junction_sides:
* @engine: a #GtkThemingEngine
*
* Returns the widget direction used for rendering.
*
* Returns: the widget direction
*
* Since: 3.0
**/
GtkJunctionSides
gtk_theming_engine_get_junction_sides (GtkThemingEngine *engine)
{
GtkThemingEnginePrivate *priv;
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), 0);
priv = engine->priv;
return gtk_style_context_get_junction_sides (priv->context);
}
/**
* gtk_theming_engine_get_color:
* @engine: a #GtkThemingEngine
* @state: state to retrieve the color for
* @color: (out): return value for the foreground color
*
* Gets the foreground color for a given state.
*
* Since: 3.0
**/
void
gtk_theming_engine_get_color (GtkThemingEngine *engine,
GtkStateFlags state,
GdkRGBA *color)
{
GtkThemingEnginePrivate *priv;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
priv = engine->priv;
gtk_style_context_get_color (priv->context, state, color);
}
/**
* gtk_theming_engine_get_background_color:
* @engine: a #GtkThemingEngine
* @state: state to retrieve the color for
* @color: (out): return value for the background color
*
* Gets the background color for a given state.
*
* Since: 3.0
**/
void
gtk_theming_engine_get_background_color (GtkThemingEngine *engine,
GtkStateFlags state,
GdkRGBA *color)
{
GtkThemingEnginePrivate *priv;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
priv = engine->priv;
gtk_style_context_get_background_color (priv->context, state, color);
}
/**
* gtk_theming_engine_get_border_color:
* @engine: a #GtkThemingEngine
* @state: state to retrieve the color for
* @color: (out): return value for the border color
*
* Gets the border color for a given state.
*
* Since: 3.0
**/
void
gtk_theming_engine_get_border_color (GtkThemingEngine *engine,
GtkStateFlags state,
GdkRGBA *color)
{
GtkThemingEnginePrivate *priv;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
priv = engine->priv;
gtk_style_context_get_border_color (priv->context, state, color);
}
/**
* gtk_theming_engine_get_border:
* @engine: a #GtkthemingEngine
* @state: state to retrieve the border for
* @border: (out): return value for the border settings
*
* Gets the border for a given state as a #GtkBorder.
*
* Since: 3.0
**/
void
gtk_theming_engine_get_border (GtkThemingEngine *engine,
GtkStateFlags state,
GtkBorder *border)
{
GtkThemingEnginePrivate *priv;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
priv = engine->priv;
gtk_style_context_get_border (priv->context, state, border);
}
/**
* gtk_theming_engine_get_padding:
* @engine: a #GtkthemingEngine
* @state: state to retrieve the padding for
* @padding: (out): return value for the padding settings
*
* Gets the padding for a given state as a #GtkBorder.
*
* Since: 3.0
**/
void
gtk_theming_engine_get_padding (GtkThemingEngine *engine,
GtkStateFlags state,
GtkBorder *padding)
{
GtkThemingEnginePrivate *priv;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
priv = engine->priv;
gtk_style_context_get_padding (priv->context, state, padding);
}
/**
* gtk_theming_engine_get_margin:
* @engine: a #GtkThemingEngine
* @state: state to retrieve the border for
* @margin: (out): return value for the margin settings
*
* Gets the margin for a given state as a #GtkBorder.
*
* Since: 3.0
**/
void
gtk_theming_engine_get_margin (GtkThemingEngine *engine,
GtkStateFlags state,
GtkBorder *margin)
{
GtkThemingEnginePrivate *priv;
g_return_if_fail (GTK_IS_THEMING_ENGINE (engine));
priv = engine->priv;
gtk_style_context_get_margin (priv->context, state, margin);
}
/**
* gtk_theming_engine_get_font:
* @engine: a #GtkThemingEngine
* @state: state to retrieve the font for
*
* Returns the font description for a given state.
*
* Returns: (transfer none): the #PangoFontDescription for the given
* state. This object is owned by GTK+ and should not be
* freed.
*
* Since: 3.0
**/
const PangoFontDescription *
gtk_theming_engine_get_font (GtkThemingEngine *engine,
GtkStateFlags state)
{
GtkThemingEnginePrivate *priv;
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), NULL);
priv = engine->priv;
return gtk_style_context_get_font (priv->context, state);
}
/* GtkThemingModule */
static gboolean
gtk_theming_module_load (GTypeModule *type_module)
{
GtkThemingModule *theming_module;
GModule *module;
gchar *name, *module_path;
theming_module = GTK_THEMING_MODULE (type_module);
name = theming_module->name;
module_path = _gtk_find_module (name, "theming-engines");
if (!module_path)
return FALSE;
module = g_module_open (module_path, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
g_free (module_path);
if (!module)
return FALSE;
if (!g_module_symbol (module, "theme_init",
(gpointer *) &theming_module->init) ||
!g_module_symbol (module, "theme_exit",
(gpointer *) &theming_module->exit) ||
!g_module_symbol (module, "create_engine",
(gpointer *) &theming_module->create_engine))
{
g_module_close (module);
return FALSE;
}
theming_module->module = module;
theming_module->init (G_TYPE_MODULE (theming_module));
return TRUE;
}
static void
gtk_theming_module_unload (GTypeModule *type_module)
{
GtkThemingModule *theming_module;
theming_module = GTK_THEMING_MODULE (type_module);
theming_module->exit ();
g_module_close (theming_module->module);
theming_module->module = NULL;
theming_module->init = NULL;
theming_module->exit = NULL;
theming_module->create_engine = NULL;
}
static void
gtk_theming_module_class_init (GtkThemingModuleClass *klass)
{
GTypeModuleClass *module_class = G_TYPE_MODULE_CLASS (klass);
module_class->load = gtk_theming_module_load;
module_class->unload = gtk_theming_module_unload;
}
static void
gtk_theming_module_init (GtkThemingModule *module)
{
}
/**
* gtk_theming_engine_load:
* @name: Theme engine name to load
*
* Loads and initializes a theming engine module from the
* standard directories.
*
* Returns: (transfer none): A theming engine, or %NULL if
* the engine @name doesn't exist.
**/
GtkThemingEngine *
gtk_theming_engine_load (const gchar *name)
{
static GHashTable *engines = NULL;
static GtkThemingEngine *default_engine;
GtkThemingEngine *engine = NULL;
if (name)
{
if (!engines)
engines = g_hash_table_new (g_str_hash, g_str_equal);
engine = g_hash_table_lookup (engines, name);
if (!engine)
{
GtkThemingModule *module;
module = g_object_new (GTK_TYPE_THEMING_MODULE, NULL);
g_type_module_set_name (G_TYPE_MODULE (module), name);
module->name = g_strdup (name);
if (module && g_type_module_use (G_TYPE_MODULE (module)))
{
engine = (module->create_engine) ();
if (engine)
g_hash_table_insert (engines, module->name, engine);
}
}
}
if (!engine)
{
if (G_UNLIKELY (!default_engine))
default_engine = g_object_new (GTK_TYPE_THEMING_ENGINE, NULL);
engine = default_engine;
}
return engine;
}
/**
* gtk_theming_engine_get_screen:
* @engine: a #GtkThemingEngine
*
* Returns the #GdkScreen to which @engine currently rendering to.
*
* Returns: (transfer none): a #GdkScreen, or %NULL.
**/
GdkScreen *
gtk_theming_engine_get_screen (GtkThemingEngine *engine)
{
GtkThemingEnginePrivate *priv;
g_return_val_if_fail (GTK_IS_THEMING_ENGINE (engine), NULL);
priv = engine->priv;
return gtk_style_context_get_screen (priv->context);
}
/* Paint method implementations */
static void
gtk_theming_engine_render_check (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GdkRGBA fg_color, bg_color;
GtkStateFlags flags;
gint exterior_size, interior_size, thickness, pad;
GtkBorderStyle border_style;
GtkBorder border;
gint border_width;
flags = gtk_theming_engine_get_state (engine);
cairo_save (cr);
gtk_theming_engine_get_color (engine, flags, &fg_color);
gtk_theming_engine_get_background_color (engine, flags, &bg_color);
gtk_theming_engine_get_border (engine, flags, &border);
gtk_theming_engine_get (engine, flags,
"border-style", &border_style,
NULL);
border_width = MIN (MIN (border.top, border.bottom),
MIN (border.left, border.right));
exterior_size = MIN (width, height);
if (exterior_size % 2 == 0) /* Ensure odd */
exterior_size -= 1;
/* FIXME: thickness */
thickness = 1;
pad = thickness + MAX (1, (exterior_size - 2 * thickness) / 9);
interior_size = MAX (1, exterior_size - 2 * pad);
if (interior_size < 7)
{
interior_size = 7;
pad = MAX (0, (exterior_size - interior_size) / 2);
}
x -= (1 + exterior_size - (gint) width) / 2;
y -= (1 + exterior_size - (gint) height) / 2;
if (border_style == GTK_BORDER_STYLE_SOLID)
{
GdkRGBA border_color;
cairo_set_line_width (cr, border_width);
gtk_theming_engine_get_border_color (engine, flags, &border_color);
cairo_rectangle (cr, x + 0.5, y + 0.5, exterior_size - 1, exterior_size - 1);
gdk_cairo_set_source_rgba (cr, &bg_color);
cairo_fill_preserve (cr);
gdk_cairo_set_source_rgba (cr, &border_color);
cairo_stroke (cr);
}
gdk_cairo_set_source_rgba (cr, &fg_color);
if (flags & GTK_STATE_FLAG_INCONSISTENT)
{
int line_thickness = MAX (1, (3 + interior_size * 2) / 7);
cairo_rectangle (cr,
x + pad,
y + pad + (1 + interior_size - line_thickness) / 2,
interior_size,
line_thickness);
cairo_fill (cr);
}
else
{
gdouble progress;
gboolean running;
running = gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress);
if ((flags & GTK_STATE_FLAG_ACTIVE) || running)
{
if (!running)
progress = 1;
cairo_translate (cr,
x + pad, y + pad);
cairo_scale (cr, interior_size / 7., interior_size / 7.);
cairo_rectangle (cr, 0, 0, 7 * progress, 7);
cairo_clip (cr);
cairo_move_to (cr, 7.0, 0.0);
cairo_line_to (cr, 7.5, 1.0);
cairo_curve_to (cr, 5.3, 2.0,
4.3, 4.0,
3.5, 7.0);
cairo_curve_to (cr, 3.0, 5.7,
1.3, 4.7,
0.0, 4.7);
cairo_line_to (cr, 0.2, 3.5);
cairo_curve_to (cr, 1.1, 3.5,
2.3, 4.3,
3.0, 5.0);
cairo_curve_to (cr, 1.0, 3.9,
2.4, 4.1,
3.2, 4.9);
cairo_curve_to (cr, 3.5, 3.1,
5.2, 2.0,
7.0, 0.0);
cairo_fill (cr);
}
}
cairo_restore (cr);
}
static void
gtk_theming_engine_render_option (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStateFlags flags;
GdkRGBA fg_color, bg_color;
gint exterior_size, interior_size, pad, thickness, border_width;
GtkBorderStyle border_style;
GtkBorder border;
flags = gtk_theming_engine_get_state (engine);
cairo_save (cr);
gtk_theming_engine_get_color (engine, flags, &fg_color);
gtk_theming_engine_get_background_color (engine, flags, &bg_color);
gtk_theming_engine_get_border (engine, flags, &border);
gtk_theming_engine_get (engine, flags,
"border-style", &border_style,
NULL);
exterior_size = MIN (width, height);
border_width = MIN (MIN (border.top, border.bottom),
MIN (border.left, border.right));
if (exterior_size % 2 == 0) /* Ensure odd */
exterior_size -= 1;
x -= (1 + exterior_size - width) / 2;
y -= (1 + exterior_size - height) / 2;
if (border_style == GTK_BORDER_STYLE_SOLID)
{
GdkRGBA border_color;
cairo_set_line_width (cr, border_width);
gtk_theming_engine_get_border_color (engine, flags, &border_color);
cairo_new_sub_path (cr);
cairo_arc (cr,
x + exterior_size / 2.,
y + exterior_size / 2.,
(exterior_size - 1) / 2.,
0, 2 * G_PI);
gdk_cairo_set_source_rgba (cr, &bg_color);
cairo_fill_preserve (cr);
gdk_cairo_set_source_rgba (cr, &border_color);
cairo_stroke (cr);
}
gdk_cairo_set_source_rgba (cr, &fg_color);
/* FIXME: thickness */
thickness = 1;
if (flags & GTK_STATE_FLAG_INCONSISTENT)
{
gint line_thickness;
pad = thickness + MAX (1, (exterior_size - 2 * thickness) / 9);
interior_size = MAX (1, exterior_size - 2 * pad);
if (interior_size < 7)
{
interior_size = 7;
pad = MAX (0, (exterior_size - interior_size) / 2);
}
line_thickness = MAX (1, (3 + interior_size * 2) / 7);
cairo_rectangle (cr,
x + pad,
y + pad + (interior_size - line_thickness) / 2.,
interior_size,
line_thickness);
cairo_fill (cr);
}
if (flags & GTK_STATE_FLAG_ACTIVE)
{
pad = thickness + MAX (1, 2 * (exterior_size - 2 * thickness) / 9);
interior_size = MAX (1, exterior_size - 2 * pad);
if (interior_size < 5)
{
interior_size = 7;
pad = MAX (0, (exterior_size - interior_size) / 2);
}
cairo_new_sub_path (cr);
cairo_arc (cr,
x + pad + interior_size / 2.,
y + pad + interior_size / 2.,
interior_size / 2.,
0, 2 * G_PI);
cairo_fill (cr);
}
cairo_restore (cr);
}
static void
add_path_arrow (cairo_t *cr,
gdouble angle,
gdouble x,
gdouble y,
gdouble size)
{
cairo_save (cr);
cairo_translate (cr, x + (size / 2), y + (size / 2));
cairo_rotate (cr, angle);
cairo_move_to (cr, 0, - (size / 4));
cairo_line_to (cr, - (size / 2), (size / 4));
cairo_line_to (cr, (size / 2), (size / 4));
cairo_close_path (cr);
cairo_restore (cr);
}
static void
gtk_theming_engine_render_arrow (GtkThemingEngine *engine,
cairo_t *cr,
gdouble angle,
gdouble x,
gdouble y,
gdouble size)
{
GtkStateFlags flags;
GdkRGBA fg_color;
cairo_save (cr);
flags = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get_color (engine, flags, &fg_color);
if (flags & GTK_STATE_FLAG_INSENSITIVE)
{
add_path_arrow (cr, angle, x + 1, y + 1, size);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_fill (cr);
}
add_path_arrow (cr, angle, x, y, size);
gdk_cairo_set_source_rgba (cr, &fg_color);
cairo_fill (cr);
cairo_restore (cr);
}
static void
add_path_line (cairo_t *cr,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
/* Adjust endpoints */
if (y1 == y2)
{
y1 += 0.5;
y2 += 0.5;
x2 += 1;
}
else if (x1 == x2)
{
x1 += 0.5;
x2 += 0.5;
y2 += 1;
}
cairo_move_to (cr, x1, y1);
cairo_line_to (cr, x2, y2);
}
static void
color_shade (const GdkRGBA *color,
gdouble factor,
GdkRGBA *color_return)
{
GtkSymbolicColor *literal, *shade;
literal = gtk_symbolic_color_new_literal (color);
shade = gtk_symbolic_color_new_shade (literal, factor);
gtk_symbolic_color_unref (literal);
gtk_symbolic_color_resolve (shade, NULL, color_return);
gtk_symbolic_color_unref (shade);
}
static void
_cairo_round_rectangle_sides (cairo_t *cr,
gdouble radius,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
guint sides,
GtkJunctionSides junction)
{
radius = CLAMP (radius, 0, MIN (width / 2, height / 2));
if (sides & SIDE_RIGHT)
{
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_TOPRIGHT))
cairo_move_to (cr, x + width, y);
else
{
cairo_new_sub_path (cr);
cairo_arc (cr, x + width - radius, y + radius, radius, - G_PI / 4, 0);
}
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_BOTTOMRIGHT))
cairo_line_to (cr, x + width, y + height);
else
cairo_arc (cr, x + width - radius, y + height - radius, radius, 0, G_PI / 4);
}
if (sides & SIDE_BOTTOM)
{
if (radius != 0 &&
! (junction & GTK_JUNCTION_CORNER_BOTTOMRIGHT))
{
if ((sides & SIDE_RIGHT) == 0)
cairo_new_sub_path (cr);
cairo_arc (cr, x + width - radius, y + height - radius, radius, G_PI / 4, G_PI / 2);
}
else if ((sides & SIDE_RIGHT) == 0)
cairo_move_to (cr, x + width, y + height);
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_BOTTOMLEFT))
cairo_line_to (cr, x, y + height);
else
cairo_arc (cr, x + radius, y + height - radius, radius, G_PI / 2, 3 * (G_PI / 4));
}
else
cairo_move_to (cr, x, y + height);
if (sides & SIDE_LEFT)
{
if (radius != 0 &&
! (junction & GTK_JUNCTION_CORNER_BOTTOMLEFT))
{
if ((sides & SIDE_BOTTOM) == 0)
cairo_new_sub_path (cr);
cairo_arc (cr, x + radius, y + height - radius, radius, 3 * (G_PI / 4), G_PI);
}
else if ((sides & SIDE_BOTTOM) == 0)
cairo_move_to (cr, x, y + height);
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_TOPLEFT))
cairo_line_to (cr, x, y);
else
cairo_arc (cr, x + radius, y + radius, radius, G_PI, G_PI + G_PI / 4);
}
if (sides & SIDE_TOP)
{
if (radius != 0 &&
! (junction & GTK_JUNCTION_CORNER_TOPLEFT))
{
if ((sides & SIDE_LEFT) == 0)
cairo_new_sub_path (cr);
cairo_arc (cr, x + radius, y + radius, radius, 5 * (G_PI / 4), 3 * (G_PI / 2));
}
else if ((sides & SIDE_LEFT) == 0)
cairo_move_to (cr, x, y);
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_TOPRIGHT))
cairo_line_to (cr, x + width, y);
else
cairo_arc (cr, x + width - radius, y + radius, radius, 3 * (G_PI / 2), - G_PI / 4);
}
}
static void
_cairo_uneven_frame (cairo_t *cr,
gdouble radius,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkBorder *border,
GtkJunctionSides junction)
{
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
cairo_set_line_width (cr, 1);
_cairo_round_rectangle_sides (cr, (gdouble) radius,
x, y,
width, height,
SIDE_ALL, junction);
_cairo_round_rectangle_sides (cr, (gdouble) radius,
x + border->left,
y + border->top,
width - border->left - border->right,
height - border->top - border->bottom,
SIDE_ALL, junction);
}
/* Set the appropriate matrix for
* patterns coming from the style context
*/
static void
style_pattern_set_matrix (cairo_pattern_t *pattern,
gdouble width,
gdouble height)
{
cairo_matrix_t matrix;
gint w, h;
if (cairo_pattern_get_type (pattern) == CAIRO_PATTERN_TYPE_SURFACE)
{
cairo_surface_t *surface;
cairo_pattern_get_surface (pattern, &surface);
w = cairo_image_surface_get_width (surface);
h = cairo_image_surface_get_height (surface);
}
else
w = h = 1;
cairo_matrix_init_scale (&matrix, (gdouble) w / width, (gdouble) h / height);
cairo_pattern_set_matrix (pattern, &matrix);
}
static void
render_background_internal (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkJunctionSides junction)
{
GdkRGBA bg_color;
cairo_pattern_t *pattern;
GtkStateFlags flags;
gboolean running;
gdouble progress, alpha = 1;
GtkBorder border;
gint radius, border_width;
GtkBorderStyle border_style;
gdouble mat_w, mat_h;
cairo_matrix_t identity;
/* Use unmodified size for pattern scaling */
mat_w = width;
mat_h = height;
flags = gtk_theming_engine_get_state (engine);
cairo_matrix_init_identity (&identity);
gtk_theming_engine_get_background_color (engine, flags, &bg_color);
gtk_theming_engine_get_border (engine, flags, &border);
gtk_theming_engine_get (engine, flags,
"background-image", &pattern,
"border-radius", &radius,
"border-style", &border_style,
NULL);
border_width = MIN (MIN (border.top, border.bottom),
MIN (border.left, border.right));
if (border_width > 1 &&
border_style == GTK_BORDER_STYLE_NONE)
{
x += (gdouble) border_width / 2;
y += (gdouble) border_width / 2;
width -= border_width;
height -= border_width;
}
else
{
x += border.left;
y += border.top;
width -= border.left + border.right;
height -= border.top + border.bottom;
}
if (width <= 0 || height <= 0)
return;
cairo_save (cr);
cairo_set_line_width (cr, border_width);
cairo_translate (cr, x, y);
running = gtk_theming_engine_state_is_running (engine, GTK_STATE_PRELIGHT, &progress);
if (gtk_theming_engine_has_class (engine, "background"))
{
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.0); /* transparent */
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
}
if (running)
{
cairo_pattern_t *other_pattern;
GtkStateFlags other_flags;
GdkRGBA other_bg;
cairo_pattern_t *new_pattern = NULL;
if (flags & GTK_STATE_FLAG_PRELIGHT)
{
other_flags = flags & ~(GTK_STATE_FLAG_PRELIGHT);
progress = 1 - progress;
}
else
other_flags = flags | GTK_STATE_FLAG_PRELIGHT;
gtk_theming_engine_get_background_color (engine, other_flags, &other_bg);
gtk_theming_engine_get (engine, other_flags,
"background-image", &other_pattern,
NULL);
if (pattern && other_pattern)
{
cairo_pattern_type_t type, other_type;
gint n0, n1;
cairo_pattern_get_color_stop_count (pattern, &n0);
cairo_pattern_get_color_stop_count (other_pattern, &n1);
type = cairo_pattern_get_type (pattern);
other_type = cairo_pattern_get_type (other_pattern);
if (type == other_type && n0 == n1)
{
gdouble offset0, red0, green0, blue0, alpha0;
gdouble offset1, red1, green1, blue1, alpha1;
gdouble x00, x01, y00, y01, x10, x11, y10, y11;
gdouble r00, r01, r10, r11;
guint i;
if (type == CAIRO_PATTERN_TYPE_LINEAR)
{
cairo_pattern_get_linear_points (pattern, &x00, &y00, &x01, &y01);
cairo_pattern_get_linear_points (other_pattern, &x10, &y10, &x11, &y11);
new_pattern = cairo_pattern_create_linear (x00 + (x10 - x00) * progress,
y00 + (y10 - y00) * progress,
x01 + (x11 - x01) * progress,
y01 + (y11 - y01) * progress);
}
else
{
cairo_pattern_get_radial_circles (pattern, &x00, &y00, &r00, &x01, &y01, &r01);
cairo_pattern_get_radial_circles (other_pattern, &x10, &y10, &r10, &x11, &y11, &r11);
new_pattern = cairo_pattern_create_radial (x00 + (x10 - x00) * progress,
y00 + (y10 - y00) * progress,
r00 + (r10 - r00) * progress,
x01 + (x11 - x01) * progress,
y01 + (y11 - y01) * progress,
r01 + (r11 - r01) * progress);
}
cairo_pattern_set_filter (new_pattern, CAIRO_FILTER_FAST);
i = 0;
/* Blend both gradients into one */
while (i < n0 && i < n1)
{
cairo_pattern_get_color_stop_rgba (pattern, i,
&offset0,
&red0, &green0, &blue0,
&alpha0);
cairo_pattern_get_color_stop_rgba (other_pattern, i,
&offset1,
&red1, &green1, &blue1,
&alpha1);
cairo_pattern_add_color_stop_rgba (new_pattern,
offset0 + ((offset1 - offset0) * progress),
red0 + ((red1 - red0) * progress),
green0 + ((green1 - green0) * progress),
blue0 + ((blue1 - blue0) * progress),
alpha0 + ((alpha1 - alpha0) * progress));
i++;
}
}
else
{
/* Different pattern types, or different color
* stop counts, alpha blend both patterns.
*/
_cairo_round_rectangle_sides (cr, (gdouble) radius,
0, 0, width, height,
SIDE_ALL, junction);
style_pattern_set_matrix (other_pattern, mat_w, mat_h);
cairo_set_source (cr, other_pattern);
cairo_fill_preserve (cr);
cairo_pattern_set_matrix (other_pattern, &identity);
/* Set alpha for posterior drawing
* of the target pattern
*/
alpha = 1 - progress;
}
}
else if (pattern || other_pattern)
{
cairo_pattern_t *p;
const GdkRGBA *c;
gdouble x0, y0, x1, y1, r0, r1;
gint n, i;
/* Blend a pattern with a color */
if (pattern)
{
p = pattern;
c = &other_bg;
progress = 1 - progress;
}
else
{
p = other_pattern;
c = &bg_color;
}
if (cairo_pattern_get_type (p) == CAIRO_PATTERN_TYPE_LINEAR)
{
cairo_pattern_get_linear_points (p, &x0, &y0, &x1, &y1);
new_pattern = cairo_pattern_create_linear (x0, y0, x1, y1);
}
else
{
cairo_pattern_get_radial_circles (p, &x0, &y0, &r0, &x1, &y1, &r1);
new_pattern = cairo_pattern_create_radial (x0, y0, r0, x1, y1, r1);
}
cairo_pattern_get_color_stop_count (p, &n);
for (i = 0; i < n; i++)
{
gdouble red1, green1, blue1, alpha1;
gdouble offset;
cairo_pattern_get_color_stop_rgba (p, i,
&offset,
&red1, &green1, &blue1,
&alpha1);
cairo_pattern_add_color_stop_rgba (new_pattern, offset,
c->red + ((red1 - c->red) * progress),
c->green + ((green1 - c->green) * progress),
c->blue + ((blue1 - c->blue) * progress),
c->alpha + ((alpha1 - c->alpha) * progress));
}
}
else
{
/* Merge just colors */
new_pattern = cairo_pattern_create_rgba (CLAMP (bg_color.red + ((other_bg.red - bg_color.red) * progress), 0, 1),
CLAMP (bg_color.green + ((other_bg.green - bg_color.green) * progress), 0, 1),
CLAMP (bg_color.blue + ((other_bg.blue - bg_color.blue) * progress), 0, 1),
CLAMP (bg_color.alpha + ((other_bg.alpha - bg_color.alpha) * progress), 0, 1));
}
if (new_pattern)
{
/* Replace pattern to use */
cairo_pattern_destroy (pattern);
pattern = new_pattern;
}
if (other_pattern)
cairo_pattern_destroy (other_pattern);
}
_cairo_round_rectangle_sides (cr, (gdouble) radius,
0, 0, width, height,
SIDE_ALL, junction);
if (pattern)
{
style_pattern_set_matrix (pattern, mat_w, mat_h);
cairo_set_source (cr, pattern);
}
else
gdk_cairo_set_source_rgba (cr, &bg_color);
if (alpha == 1)
{
if (border_width > 1 &&
border_style != GTK_BORDER_STYLE_NONE)
{
/* stroke with the same source, so the background
* has exactly the shape than the frame, this
* is important so gtk_render_background() and
* gtk_render_frame() fit perfectly with round
* borders.
*/
cairo_fill_preserve (cr);
cairo_stroke (cr);
}
else
cairo_fill (cr);
}
else
{
cairo_save (cr);
_cairo_round_rectangle_sides (cr, (gdouble) radius,
0, 0, width, height,
SIDE_ALL, junction);
cairo_clip (cr);
cairo_paint_with_alpha (cr, alpha);
cairo_restore (cr);
}
if (pattern)
{
cairo_pattern_set_matrix (pattern, &identity);
cairo_pattern_destroy (pattern);
}
cairo_restore (cr);
}
static void
gtk_theming_engine_render_background (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkJunctionSides junction;
junction = gtk_theming_engine_get_junction_sides (engine);
render_background_internal (engine, cr,
x, y, width, height,
junction);
}
/* Renders the small triangle on corners so
* frames with 0 radius have a 3D-like effect
*/
static void
_cairo_corner_triangle (cairo_t *cr,
gdouble x,
gdouble y,
gint size)
{
gint i;
cairo_move_to (cr, x + 0.5, y + size - 0.5);
cairo_line_to (cr, x + size - 0.5, y + size - 0.5);
cairo_line_to (cr, x + size - 0.5, y + 0.5);
for (i = 1; i < size - 1; i++)
{
cairo_move_to (cr, x + size - 0.5, y + i + 0.5);
cairo_line_to (cr, x + (size - i) - 0.5, y + i + 0.5);
}
}
static void
render_frame_internal (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
guint hidden_side,
GtkJunctionSides junction)
{
GtkStateFlags state;
GdkRGBA lighter;
GdkRGBA border_color;
GtkBorderStyle border_style;
gint border_width, radius;
gdouble progress, d1, d2, m;
gboolean running;
GtkBorder border;
gboolean uniform_border;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get_border_color (engine, state, &border_color);
gtk_theming_engine_get_border (engine, state, &border);
gtk_theming_engine_get (engine, state,
"border-style", &border_style,
"border-radius", &radius,
NULL);
running = gtk_theming_engine_state_is_running (engine, GTK_STATE_PRELIGHT, &progress);
border_width = MIN (MIN (border.top, border.bottom),
MIN (border.left, border.right));
uniform_border = (border.top == border.bottom &&
border.top == border.left &&
border.top == border.right);
if (running)
{
GtkStateFlags other_state;
GdkRGBA other_color;
if (state & GTK_STATE_FLAG_PRELIGHT)
{
other_state = state & ~(GTK_STATE_FLAG_PRELIGHT);
progress = 1 - progress;
}
else
other_state = state | GTK_STATE_FLAG_PRELIGHT;
gtk_theming_engine_get_border_color (engine, other_state, &other_color);
border_color.red = CLAMP (border_color.red + ((other_color.red - border_color.red) * progress), 0, 1);
border_color.green = CLAMP (border_color.green + ((other_color.green - border_color.green) * progress), 0, 1);
border_color.blue = CLAMP (border_color.blue + ((other_color.blue - border_color.blue) * progress), 0, 1);
border_color.alpha = CLAMP (border_color.alpha + ((other_color.alpha - border_color.alpha) * progress), 0, 1);
}
cairo_save (cr);
color_shade (&border_color, 1.8, &lighter);
switch (border_style)
{
case GTK_BORDER_STYLE_NONE:
break;
case GTK_BORDER_STYLE_SOLID:
cairo_set_line_width (cr, border_width);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
gdk_cairo_set_source_rgba (cr, &border_color);
if (uniform_border)
{
if (border_width > 1)
{
x += (gdouble) border_width / 2;
y += (gdouble) border_width / 2;
width -= border_width;
height -= border_width;
}
else if (border_width == 1)
{
x += 0.5;
y += 0.5;
width -= 1;
height -= 1;
}
_cairo_round_rectangle_sides (cr, (gdouble) radius,
x, y, width, height,
SIDE_ALL & ~(hidden_side),
junction);
cairo_stroke (cr);
}
else
{
cairo_save (cr);
_cairo_uneven_frame (cr, (gdouble) radius,
x, y, width, height,
&border, junction);
cairo_fill (cr);
cairo_restore (cr);
}
break;
case GTK_BORDER_STYLE_INSET:
case GTK_BORDER_STYLE_OUTSET:
cairo_set_line_width (cr, border_width);
if (radius == 0)
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
else
cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
if (border_width > 1)
{
d1 = (gdouble) border_width / 2;
d2 = border_width;
}
else
{
d1 = 0.5;
d2 = 1;
}
cairo_save (cr);
m = MIN (width, height);
m /= 2;
if (uniform_border)
{
if (border_style == GTK_BORDER_STYLE_INSET)
gdk_cairo_set_source_rgba (cr, &lighter);
else
gdk_cairo_set_source_rgba (cr, &border_color);
_cairo_round_rectangle_sides (cr, (gdouble) radius,
x + d1, y + d1,
width - d2, height - d2,
(SIDE_BOTTOM | SIDE_RIGHT) & ~(hidden_side),
junction);
cairo_stroke (cr);
if (border_style == GTK_BORDER_STYLE_INSET)
gdk_cairo_set_source_rgba (cr, &border_color);
else
gdk_cairo_set_source_rgba (cr, &lighter);
_cairo_round_rectangle_sides (cr, (gdouble) radius,
x + d1, y + d1,
width - d2, height - d2,
(SIDE_TOP | SIDE_LEFT) & ~(hidden_side),
junction);
cairo_stroke (cr);
}
else
{
cairo_save (cr);
/* Bottom/right */
if (border_style == GTK_BORDER_STYLE_INSET)
gdk_cairo_set_source_rgba (cr, &lighter);
else
gdk_cairo_set_source_rgba (cr, &border_color);
_cairo_uneven_frame (cr, (gdouble) radius,
x, y, width, height,
&border, junction);
cairo_fill (cr);
/* Top/left */
cairo_move_to (cr, x, y);
cairo_line_to (cr, x + width, y);
cairo_line_to (cr, x + width - border.right - radius / 2, y + border.top + radius / 2);
cairo_line_to (cr, x + width - border.right - radius / 2, y + height - border.bottom - radius / 2);
cairo_line_to (cr, x + border.left + radius / 2, y + height - border.bottom - radius / 2);
cairo_line_to (cr, x, y + height);
cairo_close_path (cr);
cairo_clip (cr);
if (border_style == GTK_BORDER_STYLE_INSET)
gdk_cairo_set_source_rgba (cr, &border_color);
else
gdk_cairo_set_source_rgba (cr, &lighter);
_cairo_uneven_frame (cr, (gdouble) radius,
x, y, width, height,
&border, junction);
cairo_fill (cr);
cairo_restore (cr);
}
if (border_width > 1)
{
/* overprint top/right and bottom/left corner
* triangles if there are square corners there,
* to give the box a 3D-like appearance.
*/
cairo_save (cr);
if (border_style == GTK_BORDER_STYLE_INSET)
gdk_cairo_set_source_rgba (cr, &lighter);
else
gdk_cairo_set_source_rgba (cr, &border_color);
cairo_set_line_width (cr, 1);
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_TOPRIGHT) != 0)
_cairo_corner_triangle (cr,
x + width - border_width, y,
border_width);
if (radius == 0 ||
(junction & GTK_JUNCTION_CORNER_BOTTOMLEFT) != 0)
_cairo_corner_triangle (cr,
x, y + height - border_width,
border_width);
cairo_stroke (cr);
cairo_restore (cr);
}
cairo_restore (cr);
break;
}
cairo_restore (cr);
}
static void
gtk_theming_engine_render_frame (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStateFlags flags;
Gtk9Slice *slice;
GtkBorderStyle border_style;
GtkJunctionSides junction;
flags = gtk_theming_engine_get_state (engine);
junction = gtk_theming_engine_get_junction_sides (engine);
gtk_theming_engine_get (engine, flags,
"border-image", &slice,
"border-style", &border_style,
NULL);
if (slice)
{
_gtk_9slice_render (slice, cr, x, y, width, height);
_gtk_9slice_unref (slice);
}
else if (border_style != GTK_BORDER_STYLE_NONE)
render_frame_internal (engine, cr,
x, y, width, height,
0, junction);
}
static void
gtk_theming_engine_render_expander (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStateFlags flags;
GdkRGBA outline_color, fg_color;
double vertical_overshoot;
int diameter;
double radius;
double interp; /* interpolation factor for center position */
double x_double_horz, y_double_horz;
double x_double_vert, y_double_vert;
double x_double, y_double;
gdouble angle;
gint line_width;
gboolean running, is_rtl;
gdouble progress;
cairo_save (cr);
flags = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get_color (engine, flags, &fg_color);
gtk_theming_engine_get_border_color (engine, flags, &outline_color);
running = gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress);
is_rtl = (gtk_theming_engine_get_direction (engine) == GTK_TEXT_DIR_RTL);
line_width = 1;
if (!running)
progress = (flags & GTK_STATE_FLAG_ACTIVE) ? 1 : 0;
if (!gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_HORIZONTAL))
{
if (is_rtl)
angle = (G_PI) - ((G_PI / 2) * progress);
else
angle = (G_PI / 2) * progress;
}
else
{
if (is_rtl)
angle = (G_PI / 2) + ((G_PI / 2) * progress);
else
angle = (G_PI / 2) - ((G_PI / 2) * progress);
}
interp = progress;
/* Compute distance that the stroke extends beyonds the end
* of the triangle we draw.
*/
vertical_overshoot = line_width / 2.0 * (1. / tan (G_PI / 8));
/* For odd line widths, we end the vertical line of the triangle
* at a half pixel, so we round differently.
*/
if (line_width % 2 == 1)
vertical_overshoot = ceil (0.5 + vertical_overshoot) - 0.5;
else
vertical_overshoot = ceil (vertical_overshoot);
/* Adjust the size of the triangle we draw so that the entire stroke fits
*/
diameter = (gint) MAX (3, width - 2 * vertical_overshoot);
/* If the line width is odd, we want the diameter to be even,
* and vice versa, so force the sum to be odd. This relationship
* makes the point of the triangle look right.
*/
diameter -= (1 - (diameter + line_width) % 2);
radius = diameter / 2.;
/* Adjust the center so that the stroke is properly aligned with
* the pixel grid. The center adjustment is different for the
* horizontal and vertical orientations. For intermediate positions
* we interpolate between the two.
*/
x_double_vert = floor ((x + width / 2) - (radius + line_width) / 2.) + (radius + line_width) / 2.;
y_double_vert = (y + height / 2) - 0.5;
x_double_horz = (x + width / 2) - 0.5;
y_double_horz = floor ((y + height / 2) - (radius + line_width) / 2.) + (radius + line_width) / 2.;
x_double = x_double_vert * (1 - interp) + x_double_horz * interp;
y_double = y_double_vert * (1 - interp) + y_double_horz * interp;
cairo_translate (cr, x_double, y_double);
cairo_rotate (cr, angle);
cairo_move_to (cr, - radius / 2., - radius);
cairo_line_to (cr, radius / 2., 0);
cairo_line_to (cr, - radius / 2., radius);
cairo_close_path (cr);
cairo_set_line_width (cr, line_width);
gdk_cairo_set_source_rgba (cr, &fg_color);
cairo_fill_preserve (cr);
gdk_cairo_set_source_rgba (cr, &outline_color);
cairo_stroke (cr);
cairo_restore (cr);
}
static void
gtk_theming_engine_render_focus (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStateFlags flags;
GdkRGBA color;
gint line_width;
gint8 *dash_list;
cairo_save (cr);
flags = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get_color (engine, flags, &color);
gtk_theming_engine_get_style (engine,
"focus-line-width", &line_width,
"focus-line-pattern", (gchar *) &dash_list,
NULL);
cairo_set_line_width (cr, (gdouble) line_width);
if (dash_list[0])
{
gint n_dashes = strlen ((const gchar *) dash_list);
gdouble *dashes = g_new (gdouble, n_dashes);
gdouble total_length = 0;
gdouble dash_offset;
gint i;
for (i = 0; i < n_dashes; i++)
{
dashes[i] = dash_list[i];
total_length += dash_list[i];
}
/* The dash offset here aligns the pattern to integer pixels
* by starting the dash at the right side of the left border
* Negative dash offsets in cairo don't work
* (https://bugs.freedesktop.org/show_bug.cgi?id=2729)
*/
dash_offset = - line_width / 2.;
while (dash_offset < 0)
dash_offset += total_length;
cairo_set_dash (cr, dashes, n_dashes, dash_offset);
g_free (dashes);
}
cairo_rectangle (cr,
x + line_width / 2.,
y + line_width / 2.,
width - line_width,
height - line_width);
gdk_cairo_set_source_rgba (cr, &color);
cairo_stroke (cr);
cairo_restore (cr);
g_free (dash_list);
}
static void
gtk_theming_engine_render_line (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x0,
gdouble y0,
gdouble x1,
gdouble y1)
{
GdkRGBA bg_color, darker, lighter;
GtkStateFlags flags;
gint i, thickness, thickness_dark, thickness_light, len;
cairo_matrix_t matrix;
gdouble angle;
/* FIXME: thickness */
thickness = 2;
thickness_dark = thickness / 2;
thickness_light = thickness - thickness_dark;
flags = gtk_theming_engine_get_state (engine);
cairo_save (cr);
gtk_theming_engine_get_background_color (engine, flags, &bg_color);
color_shade (&bg_color, 0.7, &darker);
color_shade (&bg_color, 1.3, &lighter);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
cairo_set_line_width (cr, 1);
angle = atan2 (x1 - x0, y1 - y0);
angle = (2 * G_PI) - angle;
angle += G_PI / 2;
cairo_get_matrix (cr, &matrix);
cairo_matrix_translate (&matrix, x0, y0);
cairo_matrix_rotate (&matrix, angle);
cairo_set_matrix (cr, &matrix);
x1 -= x0;
y1 -= y0;
len = (gint) sqrt ((x1 * x1) + (y1 * y1));
y0 = -thickness_dark;
for (i = 0; i < thickness_dark; i++)
{
gdk_cairo_set_source_rgba (cr, &lighter);
add_path_line (cr, len - i - 1.5, y0, len - 0.5, y0);
cairo_stroke (cr);
gdk_cairo_set_source_rgba (cr, &darker);
add_path_line (cr, 0.5, y0, len - i - 1.5, y0);
cairo_stroke (cr);
y0++;
}
for (i = 0; i < thickness_light; i++)
{
gdk_cairo_set_source_rgba (cr, &darker);
add_path_line (cr, 0.5, y0, thickness_light - i + 0.5, y0);
cairo_stroke (cr);
gdk_cairo_set_source_rgba (cr, &lighter);
add_path_line (cr, thickness_light - i + 0.5, y0, len - 0.5, y0);
cairo_stroke (cr);
y0++;
}
cairo_restore (cr);
}
static void
gtk_theming_engine_render_layout (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout)
{
const PangoMatrix *matrix;
GdkRGBA fg_color;
GtkStateFlags flags;
gdouble progress;
gboolean running;
cairo_save (cr);
flags = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get_color (engine, flags, &fg_color);
matrix = pango_context_get_matrix (pango_layout_get_context (layout));
running = gtk_theming_engine_state_is_running (engine, GTK_STATE_PRELIGHT, &progress);
if (running)
{
GtkStateFlags other_flags;
GdkRGBA other_fg;
if (flags & GTK_STATE_FLAG_PRELIGHT)
{
other_flags = flags & ~(GTK_STATE_FLAG_PRELIGHT);
progress = 1 - progress;
}
else
other_flags = flags | GTK_STATE_FLAG_PRELIGHT;
gtk_theming_engine_get_color (engine, other_flags, &other_fg);
fg_color.red = CLAMP (fg_color.red + ((other_fg.red - fg_color.red) * progress), 0, 1);
fg_color.green = CLAMP (fg_color.green + ((other_fg.green - fg_color.green) * progress), 0, 1);
fg_color.blue = CLAMP (fg_color.blue + ((other_fg.blue - fg_color.blue) * progress), 0, 1);
fg_color.alpha = CLAMP (fg_color.alpha + ((other_fg.alpha - fg_color.alpha) * progress), 0, 1);
}
if (matrix)
{
cairo_matrix_t cairo_matrix;
PangoRectangle rect;
cairo_matrix_init (&cairo_matrix,
matrix->xx, matrix->yx,
matrix->xy, matrix->yy,
matrix->x0, matrix->y0);
pango_layout_get_extents (layout, NULL, &rect);
pango_matrix_transform_rectangle (matrix, &rect);
pango_extents_to_pixels (&rect, NULL);
cairo_matrix.x0 += x - rect.x;
cairo_matrix.y0 += y - rect.y;
cairo_set_matrix (cr, &cairo_matrix);
}
else
cairo_move_to (cr, x, y);
if (flags & GTK_STATE_FLAG_INSENSITIVE)
{
GdkRGBA bg;
gtk_theming_engine_get_background_color (engine, flags, &bg);
cairo_save (cr);
gdk_cairo_set_source_rgba (cr, &bg);
cairo_move_to (cr, x + 1, y + 1);
_gtk_pango_fill_layout (cr, layout);
cairo_restore (cr);
}
gdk_cairo_set_source_rgba (cr, &fg_color);
pango_cairo_show_layout (cr, layout);
cairo_restore (cr);
}
static void
gtk_theming_engine_render_slider (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkOrientation orientation)
{
const GtkWidgetPath *path;
gint thickness;
path = gtk_theming_engine_get_path (engine);
gtk_theming_engine_render_background (engine, cr, x, y, width, height);
gtk_theming_engine_render_frame (engine, cr, x, y, width, height);
/* FIXME: thickness */
thickness = 2;
if (gtk_widget_path_is_type (path, GTK_TYPE_SCALE))
{
if (orientation == GTK_ORIENTATION_VERTICAL)
gtk_theming_engine_render_line (engine, cr,
x + thickness,
y + (gint) height / 2,
x + width - thickness - 1,
y + (gint) height / 2);
else
gtk_theming_engine_render_line (engine, cr,
x + (gint) width / 2,
y + thickness,
x + (gint) width / 2,
y + height - thickness - 1);
}
}
static void
gtk_theming_engine_render_frame_gap (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side,
gdouble xy0_gap,
gdouble xy1_gap)
{
GtkJunctionSides junction;
GtkStateFlags state;
gint border_width, radius;
gdouble x0, y0, x1, y1, xc, yc, wc, hc;
GtkBorder border;
xc = yc = wc = hc = 0;
state = gtk_theming_engine_get_state (engine);
junction = gtk_theming_engine_get_junction_sides (engine);
gtk_theming_engine_get_border (engine, state, &border);
gtk_theming_engine_get (engine, state,
"border-radius", &radius,
NULL);
border_width = MIN (MIN (border.top, border.bottom),
MIN (border.left, border.right));
cairo_save (cr);
switch (gap_side)
{
case GTK_POS_TOP:
xc = x + xy0_gap + border_width;
yc = y;
wc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
hc = border_width;
if (xy0_gap < radius)
junction |= GTK_JUNCTION_CORNER_TOPLEFT;
if (xy1_gap > width - radius)
junction |= GTK_JUNCTION_CORNER_TOPRIGHT;
break;
case GTK_POS_BOTTOM:
xc = x + xy0_gap + border_width;
yc = y + height - border_width;
wc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
hc = border_width;
if (xy0_gap < radius)
junction |= GTK_JUNCTION_CORNER_BOTTOMLEFT;
if (xy1_gap > width - radius)
junction |= GTK_JUNCTION_CORNER_BOTTOMRIGHT;
break;
case GTK_POS_LEFT:
xc = x;
yc = y + xy0_gap + border_width;
wc = border_width;
hc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
if (xy0_gap < radius)
junction |= GTK_JUNCTION_CORNER_TOPLEFT;
if (xy1_gap > height - radius)
junction |= GTK_JUNCTION_CORNER_BOTTOMLEFT;
break;
case GTK_POS_RIGHT:
xc = x + width - border_width;
yc = y + xy0_gap + border_width;
wc = border_width;
hc = MAX (xy1_gap - xy0_gap - 2 * border_width, 0);
if (xy0_gap < radius)
junction |= GTK_JUNCTION_CORNER_TOPRIGHT;
if (xy1_gap > height - radius)
junction |= GTK_JUNCTION_CORNER_BOTTOMRIGHT;
break;
}
cairo_clip_extents (cr, &x0, &y0, &x1, &y1);
cairo_rectangle (cr, x0, y0, x1 - x0, yc - y0);
cairo_rectangle (cr, x0, yc, xc - x0, hc);
cairo_rectangle (cr, xc + wc, yc, x1 - (xc + wc), hc);
cairo_rectangle (cr, x0, yc + hc, x1 - x0, y1 - (yc + hc));
cairo_clip (cr);
render_frame_internal (engine, cr,
x, y, width, height,
0, junction);
cairo_restore (cr);
}
static void
gtk_theming_engine_render_extension (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GtkPositionType gap_side)
{
GtkJunctionSides junction = 0;
guint hidden_side = 0;
cairo_save (cr);
switch (gap_side)
{
case GTK_POS_LEFT:
junction = GTK_JUNCTION_LEFT;
hidden_side = SIDE_LEFT;
cairo_translate (cr, x + width, y);
cairo_rotate (cr, G_PI / 2);
break;
case GTK_POS_RIGHT:
junction = GTK_JUNCTION_RIGHT;
hidden_side = SIDE_RIGHT;
cairo_translate (cr, x, y + height);
cairo_rotate (cr, - G_PI / 2);
break;
case GTK_POS_TOP:
junction = GTK_JUNCTION_TOP;
hidden_side = SIDE_TOP;
cairo_translate (cr, x + width, y + height);
cairo_rotate (cr, G_PI);
break;
case GTK_POS_BOTTOM:
junction = GTK_JUNCTION_BOTTOM;
hidden_side = SIDE_BOTTOM;
cairo_translate (cr, x, y);
break;
}
if (gap_side == GTK_POS_TOP ||
gap_side == GTK_POS_BOTTOM)
render_background_internal (engine, cr,
0, 0, width, height,
GTK_JUNCTION_BOTTOM);
else
render_background_internal (engine, cr,
0, 0, height, width,
GTK_JUNCTION_BOTTOM);
cairo_restore (cr);
cairo_save (cr);
render_frame_internal (engine, cr,
x, y, width, height,
hidden_side, junction);
cairo_restore (cr);
}
static void
render_dot (cairo_t *cr,
const GdkRGBA *lighter,
const GdkRGBA *darker,
gdouble x,
gdouble y,
gdouble size)
{
size = CLAMP ((gint) size, 2, 3);
if (size == 2)
{
gdk_cairo_set_source_rgba (cr, lighter);
cairo_rectangle (cr, x, y, 1, 1);
cairo_rectangle (cr, x + 1, y + 1, 1, 1);
cairo_fill (cr);
}
else if (size == 3)
{
gdk_cairo_set_source_rgba (cr, lighter);
cairo_rectangle (cr, x, y, 2, 1);
cairo_rectangle (cr, x, y, 1, 2);
cairo_fill (cr);
gdk_cairo_set_source_rgba (cr, darker);
cairo_rectangle (cr, x + 1, y + 1, 2, 1);
cairo_rectangle (cr, x + 2, y, 1, 2);
cairo_fill (cr);
}
}
static void
gtk_theming_engine_render_handle (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStateFlags flags;
GdkRGBA bg_color, lighter, darker;
GtkJunctionSides sides;
gint xx, yy;
cairo_save (cr);
flags = gtk_theming_engine_get_state (engine);
cairo_set_line_width (cr, 1.0);
sides = gtk_theming_engine_get_junction_sides (engine);
gtk_theming_engine_get_background_color (engine, flags, &bg_color);
color_shade (&bg_color, 0.7, &darker);
color_shade (&bg_color, 1.3, &lighter);
render_background_internal (engine, cr, x, y, width, height, sides);
if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_GRIP))
{
/* reduce confusing values to a meaningful state */
if ((sides & (GTK_JUNCTION_CORNER_TOPLEFT | GTK_JUNCTION_CORNER_BOTTOMRIGHT)) == (GTK_JUNCTION_CORNER_TOPLEFT | GTK_JUNCTION_CORNER_BOTTOMRIGHT))
sides &= ~GTK_JUNCTION_CORNER_TOPLEFT;
if ((sides & (GTK_JUNCTION_CORNER_TOPRIGHT | GTK_JUNCTION_CORNER_BOTTOMLEFT)) == (GTK_JUNCTION_CORNER_TOPRIGHT | GTK_JUNCTION_CORNER_BOTTOMLEFT))
sides &= ~GTK_JUNCTION_CORNER_TOPRIGHT;
if (sides == 0)
sides = GTK_JUNCTION_CORNER_BOTTOMRIGHT;
/* align drawing area to the connected side */
if (sides == GTK_JUNCTION_LEFT)
{
if (height < width)
width = height;
}
else if (sides == GTK_JUNCTION_CORNER_TOPLEFT)
{
if (width < height)
height = width;
else if (height < width)
width = height;
}
else if (sides == GTK_JUNCTION_CORNER_BOTTOMLEFT)
{
/* make it square, aligning to bottom left */
if (width < height)
{
y += (height - width);
height = width;
}
else if (height < width)
width = height;
}
else if (sides == GTK_JUNCTION_RIGHT)
{
/* aligning to right */
if (height < width)
{
x += (width - height);
width = height;
}
}
else if (sides == GTK_JUNCTION_CORNER_TOPRIGHT)
{
if (width < height)
height = width;
else if (height < width)
{
x += (width - height);
width = height;
}
}
else if (sides == GTK_JUNCTION_CORNER_BOTTOMRIGHT)
{
/* make it square, aligning to bottom right */
if (width < height)
{
y += (height - width);
height = width;
}
else if (height < width)
{
x += (width - height);
width = height;
}
}
else if (sides == GTK_JUNCTION_TOP)
{
if (width < height)
height = width;
}
else if (sides == GTK_JUNCTION_BOTTOM)
{
/* align to bottom */
if (width < height)
{
y += (height - width);
height = width;
}
}
else
g_assert_not_reached ();
if (sides == GTK_JUNCTION_LEFT ||
sides == GTK_JUNCTION_RIGHT)
{
gint xi;
xi = x;
while (xi < x + width)
{
gdk_cairo_set_source_rgba (cr, &lighter);
add_path_line (cr, x, y, x, y + height);
cairo_stroke (cr);
xi++;
gdk_cairo_set_source_rgba (cr, &darker);
add_path_line (cr, xi, y, xi, y + height);
cairo_stroke (cr);
xi += 2;
}
}
else if (sides == GTK_JUNCTION_TOP ||
sides == GTK_JUNCTION_BOTTOM)
{
gint yi;
yi = y;
while (yi < y + height)
{
gdk_cairo_set_source_rgba (cr, &lighter);
add_path_line (cr, x, yi, x + width, yi);
cairo_stroke (cr);
yi++;
gdk_cairo_set_source_rgba (cr, &darker);
add_path_line (cr, x, yi, x + width, yi);
cairo_stroke (cr);
yi += 2;
}
}
else if (sides == GTK_JUNCTION_CORNER_TOPLEFT)
{
gint xi, yi;
xi = x + width;
yi = y + height;
while (xi > x + 3)
{
gdk_cairo_set_source_rgba (cr, &darker);
add_path_line (cr, xi, y, x, yi);
cairo_stroke (cr);
--xi;
--yi;
add_path_line (cr, xi, y, x, yi);
cairo_stroke (cr);
--xi;
--yi;
gdk_cairo_set_source_rgba (cr, &lighter);
add_path_line (cr, xi, y, x, yi);
cairo_stroke (cr);
xi -= 3;
yi -= 3;
}
}
else if (sides == GTK_JUNCTION_CORNER_TOPRIGHT)
{
gint xi, yi;
xi = x;
yi = y + height;
while (xi < (x + width - 3))
{
gdk_cairo_set_source_rgba (cr, &lighter);
add_path_line (cr, xi, y, x + width, yi);
cairo_stroke (cr);
++xi;
--yi;
gdk_cairo_set_source_rgba (cr, &darker);
add_path_line (cr, xi, y, x + width, yi);
cairo_stroke (cr);
++xi;
--yi;
add_path_line (cr, xi, y, x + width, yi);
cairo_stroke (cr);
xi += 3;
yi -= 3;
}
}
else if (sides == GTK_JUNCTION_CORNER_BOTTOMLEFT)
{
gint xi, yi;
xi = x + width;
yi = y;
while (xi > x + 3)
{
gdk_cairo_set_source_rgba (cr, &darker);
add_path_line (cr, x, yi, xi, y + height);
cairo_stroke (cr);
--xi;
++yi;
add_path_line (cr, x, yi, xi, y + height);
cairo_stroke (cr);
--xi;
++yi;
gdk_cairo_set_source_rgba (cr, &lighter);
add_path_line (cr, x, yi, xi, y + height);
cairo_stroke (cr);
xi -= 3;
yi += 3;
}
}
else if (sides == GTK_JUNCTION_CORNER_BOTTOMRIGHT)
{
gint xi, yi;
xi = x;
yi = y;
while (xi < (x + width - 3))
{
gdk_cairo_set_source_rgba (cr, &lighter);
add_path_line (cr, xi, y + height, x + width, yi);
cairo_stroke (cr);
++xi;
++yi;
gdk_cairo_set_source_rgba (cr, &darker);
add_path_line (cr, xi, y + height, x + width, yi);
cairo_stroke (cr);
++xi;
++yi;
add_path_line (cr, xi, y + height, x + width, yi);
cairo_stroke (cr);
xi += 3;
yi += 3;
}
}
}
else if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_PANE_SEPARATOR))
{
if (width > height)
for (xx = x + width / 2 - 15; xx <= x + width / 2 + 15; xx += 5)
render_dot (cr, &lighter, &darker, xx, y + height / 2 - 1, 3);
else
for (yy = y + height / 2 - 15; yy <= y + height / 2 + 15; yy += 5)
render_dot (cr, &lighter, &darker, x + width / 2 - 1, yy, 3);
}
else
{
for (yy = y; yy < y + height; yy += 3)
for (xx = x; xx < x + width; xx += 6)
{
render_dot (cr, &lighter, &darker, xx, yy, 2);
render_dot (cr, &lighter, &darker, xx + 3, yy + 1, 2);
}
}
cairo_restore (cr);
}
static void
gtk_theming_engine_render_activity (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_SPINNER))
{
GtkStateFlags state;
guint num_steps, step;
GdkRGBA color;
gdouble progress;
gdouble radius;
gdouble half;
gint i;
num_steps = 12;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get_color (engine, state, &color);
if (gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress))
step = (guint) (progress * num_steps);
else
step = 0;
cairo_save (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_set_line_width (cr, 2.0);
cairo_translate (cr, x + width / 2, y + height / 2);
radius = MIN (width / 2, height / 2);
half = num_steps / 2;
for (i = 0; i < num_steps; i++)
{
gint inset = 0.7 * radius;
/* transparency is a function of time and intial value */
gdouble t = 1.0 - (gdouble) ((i + step) % num_steps) / num_steps;
gdouble xscale = - sin (i * G_PI / half);
gdouble yscale = - cos (i * G_PI / half);
cairo_set_source_rgba (cr,
color.red,
color.green,
color.blue,
color.alpha * t);
cairo_move_to (cr,
(radius - inset) * xscale,
(radius - inset) * yscale);
cairo_line_to (cr,
radius * xscale,
radius * yscale);
cairo_stroke (cr);
}
cairo_restore (cr);
}
else
{
gtk_theming_engine_render_background (engine, cr, x, y, width, height);
gtk_theming_engine_render_frame (engine, cr, x, y, width, height);
}
}
static GdkPixbuf *
scale_or_ref (GdkPixbuf *src,
gint width,
gint height)
{
if (width == gdk_pixbuf_get_width (src) &&
height == gdk_pixbuf_get_height (src))
return g_object_ref (src);
else
return gdk_pixbuf_scale_simple (src,
width, height,
GDK_INTERP_BILINEAR);
}
static gboolean
lookup_icon_size (GtkThemingEngine *engine,
GtkIconSize size,
gint *width,
gint *height)
{
GdkScreen *screen;
GtkSettings *settings;
screen = gtk_theming_engine_get_screen (engine);
settings = gtk_settings_get_for_screen (screen);
return gtk_icon_size_lookup_for_settings (settings, size, width, height);
}
/* Kudos to the gnome-panel guys. */
static void
colorshift_pixbuf (GdkPixbuf *src,
GdkPixbuf *dest,
gint shift)
{
gint i, j;
gint width, height, has_alpha, src_rowstride, dest_rowstride;
guchar *target_pixels;
guchar *original_pixels;
guchar *pix_src;
guchar *pix_dest;
int val;
guchar r, g, b;
has_alpha = gdk_pixbuf_get_has_alpha (src);
width = gdk_pixbuf_get_width (src);
height = gdk_pixbuf_get_height (src);
src_rowstride = gdk_pixbuf_get_rowstride (src);
dest_rowstride = gdk_pixbuf_get_rowstride (dest);
original_pixels = gdk_pixbuf_get_pixels (src);
target_pixels = gdk_pixbuf_get_pixels (dest);
for (i = 0; i < height; i++)
{
pix_dest = target_pixels + i * dest_rowstride;
pix_src = original_pixels + i * src_rowstride;
for (j = 0; j < width; j++)
{
r = *(pix_src++);
g = *(pix_src++);
b = *(pix_src++);
val = r + shift;
*(pix_dest++) = CLAMP (val, 0, 255);
val = g + shift;
*(pix_dest++) = CLAMP (val, 0, 255);
val = b + shift;
*(pix_dest++) = CLAMP (val, 0, 255);
if (has_alpha)
*(pix_dest++) = *(pix_src++);
}
}
}
static GdkPixbuf *
gtk_theming_engine_render_icon_pixbuf (GtkThemingEngine *engine,
const GtkIconSource *source,
GtkIconSize size)
{
GdkPixbuf *scaled;
GdkPixbuf *stated;
GdkPixbuf *base_pixbuf;
GtkStateFlags state;
gint width = 1;
gint height = 1;
base_pixbuf = gtk_icon_source_get_pixbuf (source);
state = gtk_theming_engine_get_state (engine);
g_return_val_if_fail (base_pixbuf != NULL, NULL);
if (size != (GtkIconSize) -1 &&
!lookup_icon_size (engine, size, &width, &height))
{
g_warning (G_STRLOC ": invalid icon size '%d'", size);
return NULL;
}
/* If the size was wildcarded, and we're allowed to scale, then scale; otherwise,
* leave it alone.
*/
if (size != (GtkIconSize) -1 &&
gtk_icon_source_get_size_wildcarded (source))
scaled = scale_or_ref (base_pixbuf, width, height);
else
scaled = g_object_ref (base_pixbuf);
/* If the state was wildcarded, then generate a state. */
if (gtk_icon_source_get_state_wildcarded (source))
{
if (state & GTK_STATE_FLAG_INSENSITIVE)
{
stated = gdk_pixbuf_copy (scaled);
gdk_pixbuf_saturate_and_pixelate (scaled, stated,
0.8, TRUE);
g_object_unref (scaled);
}
else if (state & GTK_STATE_FLAG_PRELIGHT)
{
stated = gdk_pixbuf_copy (scaled);
colorshift_pixbuf (scaled, stated, 30);
g_object_unref (scaled);
}
else
stated = scaled;
}
else
stated = scaled;
return stated;
}
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