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gtk2/gtk/gtkthemingengine.c
Cosimo Cecchi 1876823ef0 themingengine: don't hardcode white to draw insensitive labels shadow 
Use the background color instead.
I think the optimal solution would be delegating the shadow rendering to
the theme completely, and removing this in GtkThemingEngine, but for
now, this simple fix makes the dark variant more usable.

https://bugzilla.gnome.org/show_bug.cgi?id=645405
2011-03-21 11:00:53 -04:00

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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 <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, *border_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 (engine, flags,
"color", &fg_color,
"background-color", &bg_color,
"border-color", &border_color,
"border-style", &border_style,
"border-width", &border,
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)
{
cairo_set_line_width (cr, border_width);
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);
if (border_color)
gdk_cairo_set_source_rgba (cr, border_color);
else
gdk_cairo_set_source_rgba (cr, fg_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);
gdk_rgba_free (fg_color);
gdk_rgba_free (bg_color);
gdk_rgba_free (border_color);
gtk_border_free (border);
}
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, *border_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 (engine, flags,
"color", &fg_color,
"background-color", &bg_color,
"border-color", &border_color,
"border-style", &border_style,
"border-width", &border,
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)
{
cairo_set_line_width (cr, border_width);
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);
if (border_color)
gdk_cairo_set_source_rgba (cr, border_color);
else
gdk_cairo_set_source_rgba (cr, fg_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);
gdk_rgba_free (fg_color);
gdk_rgba_free (bg_color);
gdk_rgba_free (border_color);
gtk_border_free (border);
}
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 (engine, flags,
"color", &fg_color,
NULL);
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);
gdk_rgba_free (fg_color);
}
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);
}
}
/* 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 (engine, flags,
"background-image", &pattern,
"background-color", &bg_color,
"border-radius", &radius,
"border-width", &border,
"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)
{
cairo_set_line_width (cr, border_width);
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_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 (engine, other_flags,
"background-image", &other_pattern,
"background-color", &other_bg,
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
{
const GdkRGBA *color, *other_color;
/* Merge just colors */
color = bg_color;
other_color = other_bg;
new_pattern = cairo_pattern_create_rgba (CLAMP (color->red + ((other_color->red - color->red) * progress), 0, 1),
CLAMP (color->green + ((other_color->green - color->green) * progress), 0, 1),
CLAMP (color->blue + ((other_color->blue - color->blue) * progress), 0, 1),
CLAMP (color->alpha + ((other_color->alpha - 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);
if (other_bg)
gdk_rgba_free (other_bg);
}
_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);
gdk_rgba_free (bg_color);
gtk_border_free (border);
}
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;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get (engine, state,
"border-color", &border_color,
"border-style", &border_style,
"border-width", &border,
"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));
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 (engine, other_state,
"border-color", &other_color,
NULL);
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);
gdk_rgba_free (other_color);
}
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);
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);
gdk_cairo_set_source_rgba (cr, border_color);
cairo_stroke (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 (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);
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);
if (border_color)
gdk_rgba_free (border_color);
gtk_border_free (border);
}
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 (engine, flags,
"color", &fg_color,
NULL);
gtk_theming_engine_get (engine, flags,
"border-color", &outline_color,
NULL);
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);
gdk_rgba_free (fg_color);
gdk_rgba_free (outline_color);
}
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 (engine, flags,
"color", &color,
NULL);
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);
gdk_rgba_free (color);
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 (engine, flags,
"background-color", &bg_color,
NULL);
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);
gdk_rgba_free (bg_color);
}
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 (engine, flags,
"color", &fg_color,
NULL);
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 (engine, other_flags,
"color", &other_fg,
NULL);
if (fg_color && 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 (other_fg)
gdk_rgba_free (other_fg);
}
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);
gdk_rgba_free (fg_color);
}
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 (engine, state,
"border-width", &border,
"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);
gtk_border_free (border);
}
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;
GdkRGBA 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 (engine, flags,
"background-color", &bg_color,
NULL);
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);
gdk_rgba_free (bg_color);
}
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 (engine, state,
"color", &color,
NULL);
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);
gdk_rgba_free (color);
}
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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