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mutter/clutter/clutter/clutter-settings.c

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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
*/
#include "clutter-build-config.h"
#include "clutter-settings.h"
#ifdef HAVE_PANGO_FT2
/* for pango_fc_font_map_cache_clear() */
#define PANGO_ENABLE_BACKEND
#include <pango/pangofc-fontmap.h>
#endif /* HAVE_PANGO_FT2 */
#include "clutter-debug.h"
#include "clutter-settings-private.h"
#include "clutter-stage-private.h"
#include "clutter-private.h"
#include <stdlib.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))
/**
* ClutterSettings:
*
* `ClutterSettings` 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;
gint dnd_drag_threshold;
gdouble resolution;
gchar *font_name;
gint font_dpi;
gint xft_hinting;
gint xft_antialias;
gchar *xft_hint_style;
gchar *xft_rgba;
gint long_press_duration;
guint last_fontconfig_timestamp;
guint password_hint_time;
gint unscaled_font_dpi;
};
struct _ClutterSettingsClass
{
GObjectClass parent_class;
};
enum
{
PROP_0,
PROP_BACKEND,
PROP_DOUBLE_CLICK_TIME,
PROP_DOUBLE_CLICK_DISTANCE,
PROP_DND_DRAG_THRESHOLD,
PROP_FONT_NAME,
PROP_FONT_ANTIALIAS,
PROP_FONT_DPI,
PROP_FONT_HINTING,
PROP_FONT_HINT_STYLE,
PROP_FONT_RGBA,
PROP_LONG_PRESS_DURATION,
PROP_FONTCONFIG_TIMESTAMP,
PROP_PASSWORD_HINT_TIME,
PROP_UNSCALED_FONT_DPI,
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;
if (self->backend == NULL)
return;
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",
self->font_name != NULL ? self->font_name : DEFAULT_FONT_NAME,
self->xft_antialias,
self->xft_hinting,
self->xft_hint_style != NULL ? self->xft_hint_style : "<null>",
self->xft_rgba != NULL ? self->xft_rgba : "<null>");
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);
if (self->backend != NULL)
g_signal_emit_by_name (self->backend, "font-changed");
}
static void
settings_update_resolution (ClutterSettings *self)
{
const char *scale_env = NULL;
if (self->font_dpi > 0)
self->resolution = (gdouble) self->font_dpi / 1024.0;
else
self->resolution = 96.0;
scale_env = g_getenv ("GDK_DPI_SCALE");
if (scale_env != NULL)
{
double scale = g_ascii_strtod (scale_env, NULL);
if (scale != 0 && self->resolution > 0)
self->resolution *= scale;
}
CLUTTER_NOTE (BACKEND, "New resolution: %.2f (%s)",
self->resolution,
self->unscaled_font_dpi > 0 ? "unscaled" : "scaled");
if (self->backend != NULL)
g_signal_emit_by_name (self->backend, "resolution-changed");
}
static void
settings_update_fontmap (ClutterSettings *self,
guint stamp)
{
if (self->backend == NULL)
return;
#ifdef HAVE_PANGO_FT2
CLUTTER_NOTE (BACKEND, "Update fontmaps (stamp: %d)", stamp);
if (self->last_fontconfig_timestamp != stamp)
{
ClutterMainContext *context;
gboolean update_needed = FALSE;
context = _clutter_context_get_default ();
/* If there is no font map yet then we don't need to do anything
* because the config for fontconfig will be read when it is
* created */
if (context->font_map)
{
PangoFontMap *fontmap = PANGO_FONT_MAP (context->font_map);
if (PANGO_IS_FC_FONT_MAP (fontmap) &&
!FcConfigUptoDate (NULL))
{
pango_fc_font_map_cache_clear (PANGO_FC_FONT_MAP (fontmap));
if (FcInitReinitialize ())
update_needed = TRUE;
}
}
self->last_fontconfig_timestamp = stamp;
if (update_needed)
g_signal_emit_by_name (self->backend, "font-changed");
}
#endif /* HAVE_PANGO_FT2 */
}
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_DND_DRAG_THRESHOLD:
self->dnd_drag_threshold = 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->font_dpi = g_value_get_int (value);
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;
case PROP_LONG_PRESS_DURATION:
self->long_press_duration = g_value_get_int (value);
break;
case PROP_FONTCONFIG_TIMESTAMP:
settings_update_fontmap (self, g_value_get_uint (value));
break;
case PROP_PASSWORD_HINT_TIME:
self->password_hint_time = g_value_get_uint (value);
break;
case PROP_UNSCALED_FONT_DPI:
self->font_dpi = g_value_get_int (value);
settings_update_resolution (self);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
void
clutter_settings_set_property_internal (ClutterSettings *self,
const char *property,
GValue *value)
{
property = g_intern_string (property);
g_object_set_property (G_OBJECT (self), property, value);
}
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_DND_DRAG_THRESHOLD:
g_value_set_int (value, self->dnd_drag_threshold);
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;
case PROP_LONG_PRESS_DURATION:
g_value_set_int (value, self->long_press_duration);
break;
case PROP_PASSWORD_HINT_TIME:
g_value_set_uint (value, self->password_hint_time);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_settings_dispatch_properties_changed (GObject *gobject,
guint n_pspecs,
GParamSpec **pspecs)
{
ClutterSettings *self = CLUTTER_SETTINGS (gobject);
GObjectClass *klass;
/* chain up to emit ::notify */
klass = G_OBJECT_CLASS (clutter_settings_parent_class);
klass->dispatch_properties_changed (gobject, n_pspecs, pspecs);
/* emit settings-changed just once for multiple properties */
if (self->backend != NULL)
g_signal_emit_by_name (self->backend, "settings-changed");
}
static void
clutter_settings_class_init (ClutterSettingsClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
/**
* ClutterSettings:backend:
*
* A back pointer to the #ClutterBackend
*
* Since: 1.4
*
* Deprecated: 1.10
*/
obj_props[PROP_BACKEND] =
g_param_spec_object ("backend",
"Backend",
"A pointer to the backend",
CLUTTER_TYPE_BACKEND,
CLUTTER_PARAM_WRITABLE |
G_PARAM_DEPRECATED |
G_PARAM_CONSTRUCT_ONLY);
/**
* 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
*/
obj_props[PROP_DOUBLE_CLICK_TIME] =
g_param_spec_int ("double-click-time",
P_("Double Click Time"),
P_("The time between clicks necessary to detect a multiple click"),
0, G_MAXINT,
250,
CLUTTER_PARAM_READWRITE);
/**
* 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
*/
obj_props[PROP_DOUBLE_CLICK_DISTANCE] =
g_param_spec_int ("double-click-distance",
P_("Double Click Distance"),
P_("The distance between clicks necessary to detect a multiple click"),
0, G_MAXINT,
5,
CLUTTER_PARAM_READWRITE);
/**
* ClutterSettings:dnd-drag-threshold:
*
* The default distance that the cursor of a pointer device
* should travel before a drag operation should start.
*
* Since: 1.8
*/
obj_props[PROP_DND_DRAG_THRESHOLD] =
g_param_spec_int ("dnd-drag-threshold",
P_("Drag Threshold"),
P_("The distance the cursor should travel before starting to drag"),
1, G_MAXINT,
8,
CLUTTER_PARAM_READWRITE);
/**
* 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
*/
obj_props[PROP_FONT_NAME] =
g_param_spec_string ("font-name",
P_("Font Name"),
P_("The description of the default font, as one that could be parsed by Pango"),
NULL,
CLUTTER_PARAM_READWRITE);
/**
* 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
*/
obj_props[PROP_FONT_ANTIALIAS] =
g_param_spec_int ("font-antialias",
P_("Font Antialias"),
P_("Whether to use antialiasing (1 to enable, 0 to disable, and -1 to use the default)"),
-1, 1,
-1,
CLUTTER_PARAM_READWRITE);
/**
* 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
*/
obj_props[PROP_FONT_DPI] =
g_param_spec_int ("font-dpi",
P_("Font DPI"),
P_("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_UNSCALED_FONT_DPI] =
g_param_spec_int ("unscaled-font-dpi",
P_("Font DPI"),
P_("The resolution of the font, in 1024 * dots/inch, or -1 to use the default"),
-1, 1024 * 1024,
-1,
CLUTTER_PARAM_WRITABLE);
/**
* 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
*/
obj_props[PROP_FONT_HINTING] =
g_param_spec_int ("font-hinting",
P_("Font Hinting"),
P_("Whether to use hinting (1 to enable, 0 to disable and -1 to use the default)"),
-1, 1,
-1,
CLUTTER_PARAM_READWRITE);
/**
* ClutterSettings:font-hint-style:
*
* The style of the hinting used when rendering text. Valid values
* are:
*
* - hintnone
* - hintslight
* - hintmedium
* - hintfull
*
* Since: 1.4
*/
obj_props[PROP_FONT_HINT_STYLE] =
g_param_spec_string ("font-hint-style",
P_("Font Hint Style"),
P_("The style of hinting (hintnone, hintslight, hintmedium, hintfull)"),
NULL,
CLUTTER_PARAM_READWRITE);
/**
* ClutterSettings:font-subpixel-order:
*
* The type of sub-pixel antialiasing used when rendering text. Valid
* values are:
*
* - none
* - rgb
* - bgr
* - vrgb
* - vbgr
*
* Since: 1.4
*/
obj_props[PROP_FONT_RGBA] =
g_param_spec_string ("font-subpixel-order",
P_("Font Subpixel Order"),
P_("The type of subpixel antialiasing (none, rgb, bgr, vrgb, vbgr)"),
NULL,
CLUTTER_PARAM_READWRITE);
/**
* ClutterSettings:long-press-duration:
*
* Sets the minimum duration for a press to be recognized as a long press
* gesture. The duration is expressed in milliseconds.
*
* See also #ClutterClickAction:long-press-duration.
*
* Since: 1.8
*/
obj_props[PROP_LONG_PRESS_DURATION] =
g_param_spec_int ("long-press-duration",
P_("Long Press Duration"),
P_("The minimum duration for a long press gesture to be recognized"),
0, G_MAXINT,
500,
CLUTTER_PARAM_READWRITE);
obj_props[PROP_FONTCONFIG_TIMESTAMP] =
g_param_spec_uint ("fontconfig-timestamp",
P_("Fontconfig configuration timestamp"),
P_("Timestamp of the current fontconfig configuration"),
0, G_MAXUINT,
0,
CLUTTER_PARAM_WRITABLE);
/**
* ClutterText:password-hint-time:
*
* How long should Clutter show the last input character in editable
* ClutterText actors. The value is in milliseconds. A value of 0
* disables showing the password hint. 600 is a good value for
* enabling the hint.
*
* Since: 1.10
*/
obj_props[PROP_PASSWORD_HINT_TIME] =
g_param_spec_uint ("password-hint-time",
P_("Password Hint Time"),
P_("How long to show the last input character in hidden entries"),
0, G_MAXUINT,
0,
CLUTTER_PARAM_READWRITE);
gobject_class->set_property = clutter_settings_set_property;
gobject_class->get_property = clutter_settings_get_property;
gobject_class->dispatch_properties_changed =
clutter_settings_dispatch_properties_changed;
gobject_class->finalize = clutter_settings_finalize;
g_object_class_install_properties (gobject_class, PROP_LAST, obj_props);
}
static void
clutter_settings_init (ClutterSettings *self)
{
self->resolution = -1.0;
self->font_dpi = -1;
self->unscaled_font_dpi = -1;
self->double_click_time = 250;
self->double_click_distance = 5;
self->dnd_drag_threshold = 8;
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;
self->long_press_duration = 500;
}
/**
* 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)
{
static ClutterSettings *settings = NULL;
if (G_UNLIKELY (settings == NULL))
settings = g_object_new (CLUTTER_TYPE_SETTINGS, NULL);
return settings;
}
void
_clutter_settings_set_backend (ClutterSettings *settings,
ClutterBackend *backend)
{
g_assert (CLUTTER_IS_SETTINGS (settings));
g_assert (CLUTTER_IS_BACKEND (backend));
settings->backend = backend;
}
#define SETTINGS_GROUP "Settings"
void
_clutter_settings_read_from_key_file (ClutterSettings *settings,
GKeyFile *keyfile)
{
GObjectClass *settings_class;
GObject *settings_obj;
GParamSpec **pspecs;
guint n_pspecs, i;
if (!g_key_file_has_group (keyfile, SETTINGS_GROUP))
return;
settings_obj = G_OBJECT (settings);
settings_class = G_OBJECT_GET_CLASS (settings);
pspecs = g_object_class_list_properties (settings_class, &n_pspecs);
for (i = 0; i < n_pspecs; i++)
{
GParamSpec *pspec = pspecs[i];
const gchar *p_name = pspec->name;
GType p_type = G_TYPE_FUNDAMENTAL (pspec->value_type);
GValue value = G_VALUE_INIT;
GError *key_error = NULL;
g_value_init (&value, p_type);
switch (p_type)
{
case G_TYPE_INT:
case G_TYPE_UINT:
{
gint val;
val = g_key_file_get_integer (keyfile,
SETTINGS_GROUP, p_name,
&key_error);
if (p_type == G_TYPE_INT)
g_value_set_int (&value, val);
else
g_value_set_uint (&value, val);
}
break;
case G_TYPE_BOOLEAN:
{
gboolean val;
val = g_key_file_get_boolean (keyfile,
SETTINGS_GROUP, p_name,
&key_error);
g_value_set_boolean (&value, val);
}
break;
case G_TYPE_FLOAT:
case G_TYPE_DOUBLE:
{
gdouble val;
val = g_key_file_get_double (keyfile,
SETTINGS_GROUP, p_name,
&key_error);
if (p_type == G_TYPE_FLOAT)
g_value_set_float (&value, val);
else
g_value_set_double (&value, val);
}
break;
case G_TYPE_STRING:
{
gchar *val;
val = g_key_file_get_string (keyfile,
SETTINGS_GROUP, p_name,
&key_error);
g_value_take_string (&value, val);
}
break;
}
if (key_error != NULL &&
key_error->domain != G_KEY_FILE_ERROR &&
key_error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND)
{
g_critical ("Unable to read the value for setting '%s': %s",
p_name,
key_error->message);
}
if (key_error == NULL)
g_object_set_property (settings_obj, p_name, &value);
else
g_error_free (key_error);
g_value_unset (&value);
}
g_free (pspecs);
}
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