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mutter/clutter/clutter-settings.c
Neil Roberts 8d51617979 Conditionally use g_object_notify_by_pspec 
This adds a wrapper macro to clutter-private that will use
g_object_notify_by_pspec if it's compiled against a version of GLib
that is sufficiently new. Otherwise it will notify by the property
name as before by extracting the name from the pspec. The objects can
then store a static array of GParamSpecs and notify using those as
suggested in the documentation for g_object_notify_by_pspec.

Note that the name of the variable used for storing the array of
GParamSpecs is obj_props instead of properties as used in the
documentation because some places in Clutter uses 'properties' as the
name of a local variable.

Mose of the classes in Clutter have been converted using the script in
the bug report. Some classes have not been modified even though the
script picked them up as described here:

json-generator:

 We probably don't want to modify the internal copy of JSON

behaviour-depth:
rectangle:
score:
stage-manager:

 These aren't using the separate GParamSpec* variable style.

blur-effect:
win32/device-manager:

 Don't actually define any properties even though it has the enum.

box-layout:
flow-layout:

  Have some per-child properties that don't work automatically with
  the script.

clutter-model:

  The script gets confused with ClutterModelIter

stage:

  Script gets confused because PROP_USER_RESIZE doesn't match
  "user-resizable"

test-layout:

  Don't really want to modify the tests

http://bugzilla.clutter-project.org/show_bug.cgi?id=2150
2010-08-10 17:12:06 +01:00

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/**
* SECTION:clutter-settings
* @Title: ClutterSettings
* @Short_Description: Settings configuration
*
* Clutter depends on some settings to perform operations like detecting
* multiple button press events, or font options to render text.
*
* Usually, Clutter will strive to use the platform's settings in order
* to be as much integrated as possible. It is, however, possible to
* change these settings on a per-application basis, by using the
* #ClutterSettings singleton object and setting its properties. It is
* also possible, for toolkit developers, to retrieve the settings from
* the #ClutterSettings properties when implementing new UI elements,
* for instance the default font name.
*
* #ClutterSettings is available since Clutter 1.4
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-settings.h"
#include "clutter-debug.h"
#include "clutter-private.h"
#define DEFAULT_FONT_NAME "Sans 12"
#define CLUTTER_SETTINGS_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_SETTINGS, ClutterSettingsClass))
#define CLUTTER_IS_SETTINGS_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_SETTINGS))
#define CLUTTER_SETTINGS_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_SETTINGS, ClutterSettingsClass))
typedef struct _ClutterSettingsClass ClutterSettingsClass;
/**
* ClutterSettings:
*
* <structname>ClutterSettings</structname> is an opaque structure whose
* members cannot be directly accessed.
*
* Since: 1.4
*/
struct _ClutterSettings
{
GObject parent_instance;
ClutterBackend *backend;
gint double_click_time;
gint double_click_distance;
gdouble resolution;
gchar *font_name;
gint xft_hinting;
gint xft_antialias;
gchar *xft_hint_style;
gchar *xft_rgba;
};
struct _ClutterSettingsClass
{
GObjectClass parent_class;
};
enum
{
PROP_0,
PROP_BACKEND,
PROP_DOUBLE_CLICK_TIME,
PROP_DOUBLE_CLICK_DISTANCE,
PROP_FONT_NAME,
PROP_FONT_ANTIALIAS,
PROP_FONT_DPI,
PROP_FONT_HINTING,
PROP_FONT_HINT_STYLE,
PROP_FONT_RGBA,
PROP_LAST
};
static GParamSpec *obj_props[PROP_LAST];
G_DEFINE_TYPE (ClutterSettings, clutter_settings, G_TYPE_OBJECT);
static inline void
settings_update_font_options (ClutterSettings *self)
{
cairo_hint_style_t hint_style = CAIRO_HINT_STYLE_NONE;
cairo_antialias_t antialias_mode = CAIRO_ANTIALIAS_GRAY;
cairo_subpixel_order_t subpixel_order = CAIRO_SUBPIXEL_ORDER_DEFAULT;
cairo_font_options_t *options;
options = cairo_font_options_create ();
cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_ON);
if (self->xft_hinting >= 0 &&
self->xft_hint_style == NULL)
{
hint_style = CAIRO_HINT_STYLE_NONE;
}
else if (self->xft_hint_style != NULL)
{
if (strcmp (self->xft_hint_style, "hintnone") == 0)
hint_style = CAIRO_HINT_STYLE_NONE;
else if (strcmp (self->xft_hint_style, "hintslight") == 0)
hint_style = CAIRO_HINT_STYLE_SLIGHT;
else if (strcmp (self->xft_hint_style, "hintmedium") == 0)
hint_style = CAIRO_HINT_STYLE_MEDIUM;
else if (strcmp (self->xft_hint_style, "hintfull") == 0)
hint_style = CAIRO_HINT_STYLE_FULL;
}
cairo_font_options_set_hint_style (options, hint_style);
if (self->xft_rgba)
{
if (strcmp (self->xft_rgba, "rgb") == 0)
subpixel_order = CAIRO_SUBPIXEL_ORDER_RGB;
else if (strcmp (self->xft_rgba, "bgr") == 0)
subpixel_order = CAIRO_SUBPIXEL_ORDER_BGR;
else if (strcmp (self->xft_rgba, "vrgb") == 0)
subpixel_order = CAIRO_SUBPIXEL_ORDER_VRGB;
else if (strcmp (self->xft_rgba, "vbgr") == 0)
subpixel_order = CAIRO_SUBPIXEL_ORDER_VBGR;
}
cairo_font_options_set_subpixel_order (options, subpixel_order);
if (self->xft_antialias >= 0 && !self->xft_antialias)
antialias_mode = CAIRO_ANTIALIAS_NONE;
else if (subpixel_order != CAIRO_SUBPIXEL_ORDER_DEFAULT)
antialias_mode = CAIRO_ANTIALIAS_SUBPIXEL;
else if (self->xft_antialias >= 0)
antialias_mode = CAIRO_ANTIALIAS_GRAY;
cairo_font_options_set_antialias (options, antialias_mode);
CLUTTER_NOTE (BACKEND, "New font options:\n"
" - font-name: %s\n"
" - antialias: %d\n"
" - hinting: %d\n"
" - hint-style: %s\n"
" - rgba: %s\n"
" - dpi: %.2f",
self->font_name != NULL ? self->font_name : DEFAULT_FONT_NAME,
self->xft_antialias,
self->xft_hinting,
self->xft_hint_style != NULL ? self->font_name : "<null>",
self->xft_rgba != NULL ? self->xft_rgba : "<null>",
self->resolution);
clutter_backend_set_font_options (self->backend, options);
cairo_font_options_destroy (options);
}
static void
settings_update_font_name (ClutterSettings *self)
{
CLUTTER_NOTE (BACKEND, "New font-name: %s", self->font_name);
g_signal_emit_by_name (self->backend, "font-changed");
}
static void
settings_update_resolution (ClutterSettings *self)
{
CLUTTER_NOTE (BACKEND, "New resolution: %.2f", self->resolution);
g_signal_emit_by_name (self->backend, "resolution-changed");
}
static void
clutter_settings_finalize (GObject *gobject)
{
ClutterSettings *self = CLUTTER_SETTINGS (gobject);
g_free (self->font_name);
g_free (self->xft_hint_style);
g_free (self->xft_rgba);
G_OBJECT_CLASS (clutter_settings_parent_class)->finalize (gobject);
}
static void
clutter_settings_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterSettings *self = CLUTTER_SETTINGS (gobject);
switch (prop_id)
{
case PROP_BACKEND:
self->backend = g_value_get_object (value);
break;
case PROP_DOUBLE_CLICK_TIME:
self->double_click_time = g_value_get_int (value);
break;
case PROP_DOUBLE_CLICK_DISTANCE:
self->double_click_distance = g_value_get_int (value);
break;
case PROP_FONT_NAME:
g_free (self->font_name);
self->font_name = g_value_dup_string (value);
settings_update_font_name (self);
break;
case PROP_FONT_ANTIALIAS:
self->xft_antialias = g_value_get_int (value);
settings_update_font_options (self);
break;
case PROP_FONT_DPI:
self->resolution = (gdouble) g_value_get_int (value) / 1024.0;
settings_update_resolution (self);
break;
case PROP_FONT_HINTING:
self->xft_hinting = g_value_get_int (value);
settings_update_font_options (self);
break;
case PROP_FONT_HINT_STYLE:
g_free (self->xft_hint_style);
self->xft_hint_style = g_value_dup_string (value);
settings_update_font_options (self);
break;
case PROP_FONT_RGBA:
g_free (self->xft_rgba);
self->xft_rgba = g_value_dup_string (value);
settings_update_font_options (self);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_settings_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterSettings *self = CLUTTER_SETTINGS (gobject);
switch (prop_id)
{
case PROP_DOUBLE_CLICK_TIME:
g_value_set_int (value, self->double_click_time);
break;
case PROP_DOUBLE_CLICK_DISTANCE:
g_value_set_int (value, self->double_click_distance);
break;
case PROP_FONT_NAME:
g_value_set_string (value, self->font_name);
break;
case PROP_FONT_ANTIALIAS:
g_value_set_int (value, self->xft_antialias);
break;
case PROP_FONT_DPI:
g_value_set_int (value, self->resolution * 1024);
break;
case PROP_FONT_HINTING:
g_value_set_int (value, self->xft_hinting);
break;
case PROP_FONT_HINT_STYLE:
g_value_set_string (value, self->xft_hint_style);
break;
case PROP_FONT_RGBA:
g_value_set_string (value, self->xft_rgba);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_settings_notify (GObject *gobject,
GParamSpec *pspec)
{
ClutterSettings *self = CLUTTER_SETTINGS (gobject);
g_signal_emit_by_name (self->backend, "settings-changed");
}
static void
clutter_settings_class_init (ClutterSettingsClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GParamSpec *pspec;
gobject_class->set_property = clutter_settings_set_property;
gobject_class->get_property = clutter_settings_get_property;
gobject_class->notify = clutter_settings_notify;
gobject_class->finalize = clutter_settings_finalize;
/**
* ClutterSettings:backend:
*
* A back pointer to the #ClutterBackend
*
* Since: 1.4
*/
pspec = g_param_spec_object ("backend",
"Backend",
"A pointer to the backend",
CLUTTER_TYPE_BACKEND,
CLUTTER_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY);
obj_props[PROP_BACKEND] = pspec;
g_object_class_install_property (gobject_class, PROP_BACKEND, pspec);
/**
* ClutterSettings:double-click-time:
*
* The time, in milliseconds, that should elapse between button-press
* events in order to increase the click count by 1.
*
* Since: 1.4
*/
pspec = g_param_spec_int ("double-click-time",
"Double Click Time",
"The time between clicks necessary to detect "
"a multiple click",
0, G_MAXINT,
250,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_DOUBLE_CLICK_TIME] = pspec;
g_object_class_install_property (gobject_class,
PROP_DOUBLE_CLICK_TIME,
pspec);
/**
* ClutterSettings:double-click-distance:
*
* The maximum distance, in pixels, between button-press events that
* determines whether or not to increase the click count by 1.
*
* Since: 1.4
*/
pspec = g_param_spec_int ("double-click-distance",
"Double Click Distance",
"The distance between clicks necessary to detect "
"a multiple click",
0, G_MAXINT,
5,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_DOUBLE_CLICK_DISTANCE] = pspec;
g_object_class_install_property (gobject_class,
PROP_DOUBLE_CLICK_DISTANCE,
pspec);
/**
* ClutterSettings:font-name:
*
* The default font name that should be used by text actors, as
* a string that can be passed to pango_font_description_from_string().
*
* Since: 1.4
*/
pspec = g_param_spec_string ("font-name",
"Font Name",
"The description of the default font, as "
"one that could be parsed by Pango",
NULL,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_FONT_NAME] = pspec;
g_object_class_install_property (gobject_class,
PROP_FONT_NAME,
pspec);
/**
* ClutterSettings:font-antialias:
*
* Whether or not to use antialiasing when rendering text; a value
* of 1 enables it unconditionally; a value of 0 disables it
* unconditionally; and -1 will use the system's default.
*
* Since: 1.4
*/
pspec = g_param_spec_int ("font-antialias",
"Font Antialias",
"Whether to use antialiasing (1 to enable, 0 to "
"disable, and -1 to use the default)",
-1, 1,
-1,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_FONT_ANTIALIAS] = pspec;
g_object_class_install_property (gobject_class,
PROP_FONT_ANTIALIAS,
pspec);
/**
* ClutterSettings:font-dpi:
*
* The DPI used when rendering text, as a value of 1024 * dots/inch.
*
* If set to -1, the system's default will be used instead
*
* Since: 1.4
*/
pspec = g_param_spec_int ("font-dpi",
"Font DPI",
"The resolution of the font, in 1024 * dots/inch, "
"or -1 to use the default",
-1, 1024 * 1024,
-1,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_FONT_DPI] = pspec;
g_object_class_install_property (gobject_class,
PROP_FONT_DPI,
pspec);
/**
* ClutterSettings:font-hinting:
*
* Whether or not to use hinting when rendering text; a value of 1
* unconditionally enables it; a value of 0 unconditionally disables
* it; and a value of -1 will use the system's default.
*
* Since: 1.4
*/
pspec = g_param_spec_int ("font-hinting",
"Font Hinting",
"Whether to use hinting (1 to enable, 0 to disable "
"and -1 to use the default)",
-1, 1,
-1,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_FONT_HINTING] = pspec;
g_object_class_install_property (gobject_class,
PROP_FONT_HINTING,
pspec);
/**
* ClutterSettings:font-hint-style:
*
* The style of the hinting used when rendering text. Valid values
* are:
* <itemizedlist>
* <listitem><simpara>hintnone</simpara></listitem>
* <listitem><simpara>hintslight</simpara></listitem>
* <listitem><simpara>hintmedium</simpara></listitem>
* <listitem><simpara>hintfull</simpara></listitem>
* </itemizedlist>
*
* Since: 1.4
*/
pspec = g_param_spec_string ("font-hint-style",
"Font Hint Style",
"The style of hinting (hintnone, hintslight, "
"hintmedium, hintfull)",
NULL,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_FONT_HINT_STYLE] = pspec;
g_object_class_install_property (gobject_class,
PROP_FONT_HINT_STYLE,
pspec);
/**
* ClutterSettings:font-subpixel-order:
*
* The type of sub-pixel antialiasing used when rendering text. Valid
* values are:
* <itemizedlist>
* <listitem><simpara>none</simpara></listitem>
* <listitem><simpara>rgb</simpara></listitem>
* <listitem><simpara>bgr</simpara></listitem>
* <listitem><simpara>vrgb</simpara></listitem>
* <listitem><simpara>vbgr</simpara></listitem>
* </itemizedlist>
*
* Since: 1.4
*/
pspec = g_param_spec_string ("font-subpixel-order",
"Font Subpixel Order",
"The type of subpixel antialiasing (none, rgb, "
"bgr, vrgb, vbgr)",
NULL,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_FONT_RGBA] = pspec;
g_object_class_install_property (gobject_class,
PROP_FONT_RGBA,
pspec);
}
static void
clutter_settings_init (ClutterSettings *self)
{
self->resolution = -1.0;
self->double_click_time = 250;
self->double_click_distance = 5;
self->font_name = g_strdup (DEFAULT_FONT_NAME);
self->xft_antialias = -1;
self->xft_hinting = -1;
self->xft_hint_style = NULL;
self->xft_rgba = NULL;
}
/**
* clutter_settings_get_default:
*
* Retrieves the singleton instance of #ClutterSettings
*
* Return value: (transfer none): the instance of #ClutterSettings. The
* returned object is owned by Clutter and it should not be unreferenced
* directly
*
* Since: 1.4
*/
ClutterSettings *
clutter_settings_get_default (void)
{
ClutterMainContext *context = _clutter_context_get_default ();
if (G_LIKELY (context->settings != NULL))
return context->settings;
context->settings = g_object_new (CLUTTER_TYPE_SETTINGS,
"backend", context->backend,
NULL);
return context->settings;
}
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