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mutter/clutter/clutter-script-parser.c
Emmanuele Bassi cb60c038ac behaviour: Implement the implicit alpha parsing 
ClutterBehaviour should implement the Scriptable interface
and parse ClutterAlpha when implicitly defined, instead of
having this ad hoc code inside ClutterScriptParser itself.

After all, only ClutterBehaviour supports Alpha defined
implicitly.
2009-11-06 11:39:30 +00:00

1884 lines
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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2006, 2007, 2008 OpenedHand Ltd
* Copyright (C) 2009 Intel Corportation
*
* 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.
*
* Original author:
*
* Emmanuele Bassi <ebassi@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <stdlib.h>
#include <glib.h>
#include <gmodule.h>
#include "clutter-actor.h"
#include "clutter-behaviour.h"
#include "clutter-container.h"
#include "clutter-debug.h"
#include "clutter-enum-types.h"
#include "clutter-script.h"
#include "clutter-script-private.h"
#include "clutter-scriptable.h"
#include "clutter-private.h"
static void clutter_script_parser_object_end (JsonParser *parser,
JsonObject *object);
static void clutter_script_parser_parse_end (JsonParser *parser);
G_DEFINE_TYPE (ClutterScriptParser, clutter_script_parser, JSON_TYPE_PARSER);
static void
clutter_script_parser_class_init (ClutterScriptParserClass *klass)
{
JsonParserClass *parser_class = JSON_PARSER_CLASS (klass);
parser_class->object_end = clutter_script_parser_object_end;
parser_class->parse_end = clutter_script_parser_parse_end;
}
static void
clutter_script_parser_init (ClutterScriptParser *parser)
{
}
GType
clutter_script_get_type_from_symbol (const gchar *symbol)
{
static GModule *module = NULL;
GTypeGetFunc func;
GType gtype = G_TYPE_INVALID;
if (!module)
module = g_module_open (NULL, G_MODULE_BIND_LAZY);
if (g_module_symbol (module, symbol, (gpointer)&func))
gtype = func ();
return gtype;
}
GType
clutter_script_get_type_from_class (const gchar *name)
{
static GModule *module = NULL;
GString *symbol_name = g_string_sized_new (64);
GType gtype = G_TYPE_INVALID;
GTypeGetFunc func;
gchar *symbol;
gint i;
if (G_UNLIKELY (!module))
module = g_module_open (NULL, G_MODULE_BIND_LAZY);
for (i = 0; name[i] != '\0'; i++)
{
gchar c = name[i];
/* the standard naming policy for GObject-based libraries
* is:
*
* NAME := INITIAL_WORD WORD+
* INITIAL_WORD := [A-Z][a-z0-9]*
* WORD := [A-Z]{1,2}[a-z0-9]+ | [A-Z]{2,}
*
* for instance:
*
* GString -> g_string
* GtkCTree -> gtk_ctree
* ClutterX11TexturePixmap -> clutter_x11_texture_pixmap
*
* see:
*
* http://mail.gnome.org/archives/gtk-devel-list/2007-June/msg00022.html
*
* and:
*
* http://git.gnome.org/cgit/gtk+/plain/gtk/gtkbuilderparser.c
*/
if ((c == g_ascii_toupper (c) &&
i > 0 && name[i - 1] != g_ascii_toupper (name[i - 1])) ||
(i > 2 && name[i] == g_ascii_toupper (name[i]) &&
name[i - 1] == g_ascii_toupper (name[i - 1]) &&
name[i - 2] == g_ascii_toupper (name[i - 2])))
g_string_append_c (symbol_name, '_');
g_string_append_c (symbol_name, g_ascii_tolower (c));
}
g_string_append (symbol_name, "_get_type");
symbol = g_string_free (symbol_name, FALSE);
if (g_module_symbol (module, symbol, (gpointer)&func))
{
CLUTTER_NOTE (SCRIPT, "Type function: %s", symbol);
gtype = func ();
}
g_free (symbol);
return gtype;
}
/*
* clutter_script_enum_from_string:
* @type: a #GType for an enumeration type
* @string: the enumeration value as a string
* @enum_value: return location for the enumeration value as an integer
*
* Converts an enumeration value inside @string into a numeric
* value and places it into @enum_value.
*
* The enumeration value can be an integer, the enumeration nick
* or the enumeration name, as part of the #GEnumValue structure.
*
* Return value: %TRUE if the conversion was successfull.
*/
gboolean
clutter_script_enum_from_string (GType type,
const gchar *string,
gint *enum_value)
{
GEnumClass *eclass;
GEnumValue *ev;
gchar *endptr;
gint value;
gboolean retval = TRUE;
g_return_val_if_fail (G_TYPE_IS_ENUM (type), 0);
g_return_val_if_fail (string != NULL, 0);
value = strtoul (string, &endptr, 0);
if (endptr != string) /* parsed a number */
*enum_value = value;
else
{
eclass = g_type_class_ref (type);
ev = g_enum_get_value_by_name (eclass, string);
if (!ev)
ev = g_enum_get_value_by_nick (eclass, string);
if (ev)
*enum_value = ev->value;
else
retval = FALSE;
g_type_class_unref (eclass);
}
return retval;
}
gboolean
clutter_script_flags_from_string (GType type,
const gchar *string,
gint *flags_value)
{
gchar *endptr, *prevptr;
guint i, j, ret, value;
gchar *flagstr;
GFlagsValue *fv;
const gchar *flag;
g_return_val_if_fail (G_TYPE_IS_FLAGS (type), 0);
g_return_val_if_fail (string != 0, 0);
ret = TRUE;
value = strtoul (string, &endptr, 0);
if (endptr != string) /* parsed a number */
*flags_value = value;
else
{
GFlagsClass *fclass;
fclass = g_type_class_ref (type);
flagstr = g_strdup (string);
for (value = i = j = 0; ; i++)
{
gboolean eos = (flagstr[i] == '\0') ? TRUE : FALSE;
if (!eos && flagstr[i] != '|')
continue;
flag = &flagstr[j];
endptr = &flagstr[i];
if (!eos)
{
flagstr[i++] = '\0';
j = i;
}
/* trim spaces */
for (;;)
{
gunichar ch = g_utf8_get_char (flag);
if (!g_unichar_isspace (ch))
break;
flag = g_utf8_next_char (flag);
}
while (endptr > flag)
{
gunichar ch;
prevptr = g_utf8_prev_char (endptr);
ch = g_utf8_get_char (prevptr);
if (!g_unichar_isspace (ch))
break;
endptr = prevptr;
}
if (endptr > flag)
{
*endptr = '\0';
fv = g_flags_get_value_by_name (fclass, flag);
if (!fv)
fv = g_flags_get_value_by_nick (fclass, flag);
if (fv)
value |= fv->value;
else
{
ret = FALSE;
break;
}
}
if (eos)
{
*flags_value = value;
break;
}
}
g_free (flagstr);
g_type_class_unref (fclass);
}
return ret;
}
static gboolean
parse_knot_from_array (JsonArray *array,
ClutterKnot *knot)
{
if (json_array_get_length (array) != 2)
return FALSE;
knot->x = json_array_get_int_element (array, 0);
knot->y = json_array_get_int_element (array, 1);
return TRUE;
}
static gboolean
parse_knot_from_object (JsonObject *object,
ClutterKnot *knot)
{
if (json_object_has_member (object, "x"))
knot->x = json_object_get_int_member (object, "x");
else
knot->x = 0;
if (json_object_has_member (object, "y"))
knot->y = json_object_get_int_member (object, "y");
else
knot->y = 0;
return TRUE;
}
gboolean
clutter_script_parse_knot (ClutterScript *script,
JsonNode *node,
ClutterKnot *knot)
{
g_return_val_if_fail (CLUTTER_IS_SCRIPT (script), FALSE);
g_return_val_if_fail (node != NULL, FALSE);
g_return_val_if_fail (knot != NULL, FALSE);
switch (JSON_NODE_TYPE (node))
{
case JSON_NODE_ARRAY:
return parse_knot_from_array (json_node_get_array (node), knot);
case JSON_NODE_OBJECT:
return parse_knot_from_object (json_node_get_object (node), knot);
default:
break;
}
return FALSE;
}
static gboolean
parse_geometry_from_array (JsonArray *array,
ClutterGeometry *geometry)
{
if (json_array_get_length (array) != 4)
return FALSE;
geometry->x = json_array_get_int_element (array, 0);
geometry->y = json_array_get_int_element (array, 1);
geometry->width = json_array_get_int_element (array, 2);
geometry->height = json_array_get_int_element (array, 3);
return TRUE;
}
static gboolean
parse_geometry_from_object (JsonObject *object,
ClutterGeometry *geometry)
{
if (json_object_has_member (object, "x"))
geometry->x = json_object_get_int_member (object, "x");
else
geometry->x = 0;
if (json_object_has_member (object, "y"))
geometry->y = json_object_get_int_member (object, "y");
else
geometry->y = 0;
if (json_object_has_member (object, "width"))
geometry->width = json_object_get_int_member (object, "width");
else
geometry->width = 0;
if (json_object_has_member (object, "height"))
geometry->height = json_object_get_int_member (object, "height");
else
geometry->height = 0;
return TRUE;
}
gboolean
clutter_script_parse_geometry (ClutterScript *script,
JsonNode *node,
ClutterGeometry *geometry)
{
g_return_val_if_fail (CLUTTER_IS_SCRIPT (script), FALSE);
g_return_val_if_fail (node != NULL, FALSE);
g_return_val_if_fail (geometry != NULL, FALSE);
switch (JSON_NODE_TYPE (node))
{
case JSON_NODE_ARRAY:
return parse_geometry_from_array (json_node_get_array (node), geometry);
case JSON_NODE_OBJECT:
return parse_geometry_from_object (json_node_get_object (node), geometry);
default:
break;
}
return FALSE;
}
static gboolean
parse_color_from_array (JsonArray *array,
ClutterColor *color)
{
if (json_array_get_length (array) != 3 ||
json_array_get_length (array) != 4)
return FALSE;
color->red = CLAMP (json_array_get_int_element (array, 0), 0, 255);
color->green = CLAMP (json_array_get_int_element (array, 1), 0, 255);
color->blue = CLAMP (json_array_get_int_element (array, 2), 0, 255);
if (json_array_get_length (array) == 4)
color->alpha = CLAMP (json_array_get_int_element (array, 3), 0, 255);
else
color->alpha = 255;
return TRUE;
}
static gboolean
parse_color_from_object (JsonObject *object,
ClutterColor *color)
{
if (json_object_has_member (object, "red"))
color->red = CLAMP (json_object_get_int_member (object, "red"), 0, 255);
else
color->red = 0;
if (json_object_has_member (object, "green"))
color->green = CLAMP (json_object_get_int_member (object, "green"), 0, 255);
else
color->green = 0;
if (json_object_has_member (object, "blue"))
color->blue = CLAMP (json_object_get_int_member (object, "blue"), 0, 255);
else
color->blue = 0;
if (json_object_has_member (object, "alpha"))
color->alpha = CLAMP (json_object_get_int_member (object, "alpha"), 0, 255);
else
color->alpha = 255;
return TRUE;
}
gboolean
clutter_script_parse_color (ClutterScript *script,
JsonNode *node,
ClutterColor *color)
{
g_return_val_if_fail (CLUTTER_IS_SCRIPT (script), FALSE);
g_return_val_if_fail (node != NULL, FALSE);
g_return_val_if_fail (color != NULL, FALSE);
switch (JSON_NODE_TYPE (node))
{
case JSON_NODE_ARRAY:
return parse_color_from_array (json_node_get_array (node), color);
case JSON_NODE_OBJECT:
return parse_color_from_object (json_node_get_object (node), color);
case JSON_NODE_VALUE:
return clutter_color_from_string (color, json_node_get_string (node));
default:
break;
}
return FALSE;
}
static const gchar *
get_id_from_node (JsonNode *node)
{
JsonObject *object;
switch (JSON_NODE_TYPE (node))
{
case JSON_NODE_OBJECT:
object = json_node_get_object (node);
if (json_object_has_member (object, "id"))
return json_object_get_string_member (object, "id");
break;
case JSON_NODE_VALUE:
return json_node_get_string (node);
default:
break;
}
return NULL;
}
static GList *
parse_children (ObjectInfo *oinfo,
JsonNode *node)
{
JsonArray *array;
GList *retval;
guint array_len, i;
if (JSON_NODE_TYPE (node) != JSON_NODE_ARRAY)
return NULL;
retval = oinfo->children;
array = json_node_get_array (node);
array_len = json_array_get_length (array);
for (i = 0; i < array_len; i++)
{
JsonNode *child = json_array_get_element (array, i);
const gchar *id;
id = get_id_from_node (child);
if (id)
retval = g_list_prepend (retval, g_strdup (id));
}
return g_list_reverse (retval);
}
static GList *
parse_signals (ClutterScript *script,
ObjectInfo *oinfo,
JsonNode *node)
{
JsonArray *array;
GList *retval;
guint array_len, i;
if (JSON_NODE_TYPE (node) != JSON_NODE_ARRAY)
{
_clutter_script_warn_invalid_value (script, "signals", "Array", node);
return NULL;
}
retval = oinfo->signals;
array = json_node_get_array (node);
array_len = json_array_get_length (array);
for (i = 0; i < array_len; i++)
{
JsonNode *val = json_array_get_element (array, i);
JsonObject *object;
SignalInfo *sinfo;
const gchar *name;
const gchar *handler;
const gchar *connect;
GConnectFlags flags = 0;
if (JSON_NODE_TYPE (val) != JSON_NODE_OBJECT)
{
_clutter_script_warn_invalid_value (script,
"signals array", "Object",
node);
continue;
}
object = json_node_get_object (val);
/* mandatory: "name" */
if (!json_object_has_member (object, "name"))
{
_clutter_script_warn_missing_attribute (script, NULL, "name");
continue;
}
else
{
name = json_object_get_string_member (object, "name");
if (!name)
{
_clutter_script_warn_invalid_value (script,
"name", "string",
val);
continue;
}
}
/* mandatory: "handler" */
if (!json_object_has_member (object, "handler"))
{
_clutter_script_warn_missing_attribute (script, NULL, "handler");
continue;
}
else
{
handler = json_object_get_string_member (object, "handler");
if (!handler)
{
_clutter_script_warn_invalid_value (script,
"handler", "string",
val);
continue;
}
}
/* optional: "object" */
if (json_object_has_member (object, "object"))
connect = json_object_get_string_member (object, "object");
else
connect = NULL;
/* optional: "after" */
if (json_object_has_member (object, "after"))
{
if (json_object_get_boolean_member (object, "after"))
flags |= G_CONNECT_AFTER;
}
/* optional: "swapped" */
if (json_object_has_member (object, "swapped"))
{
if (json_object_get_boolean_member (object, "swapped"))
flags |= G_CONNECT_SWAPPED;
}
CLUTTER_NOTE (SCRIPT,
"Parsing signal '%s' (handler:%s, object:%s, flags:%d)",
name,
handler, connect, flags);
sinfo = g_slice_new0 (SignalInfo);
sinfo->name = g_strdup (name);
sinfo->handler = g_strdup (handler);
sinfo->object = g_strdup (connect);
sinfo->flags = flags;
retval = g_list_prepend (retval, sinfo);
}
return retval;
}
static GList *
parse_behaviours (ObjectInfo *oinfo,
JsonNode *node)
{
JsonArray *array;
GList *retval;
guint array_len, i;
if (JSON_NODE_TYPE (node) != JSON_NODE_ARRAY)
return NULL;
retval = oinfo->behaviours;
array = json_node_get_array (node);
array_len = json_array_get_length (array);
for (i = 0; i < array_len; i++)
{
JsonNode *child = json_array_get_element (array, i);
const gchar *id;
id = get_id_from_node (child);
if (id)
retval = g_list_prepend (retval, g_strdup (id));
}
return g_list_reverse (retval);
}
static ClutterTimeline *
construct_timeline (ClutterScript *script,
JsonObject *object)
{
ClutterTimeline *retval = NULL;
ObjectInfo *oinfo;
GList *members, *l;
/* we fake an ObjectInfo so we can reuse clutter_script_construct_object()
* here; we do not save it inside the hash table, because if this had
* been a named object then we wouldn't have ended up here in the first
* place
*/
oinfo = g_slice_new0 (ObjectInfo);
oinfo->gtype = CLUTTER_TYPE_TIMELINE;
oinfo->id = g_strdup ("dummy");
members = json_object_get_members (object);
for (l = members; l != NULL; l = l->next)
{
const gchar *name = l->data;
JsonNode *node = json_object_get_member (object, name);
PropertyInfo *pinfo = g_slice_new0 (PropertyInfo);
pinfo->name = g_strdelimit (g_strdup (name), G_STR_DELIMITERS, '-');
pinfo->node = node;
oinfo->properties = g_list_prepend (oinfo->properties, pinfo);
}
g_list_free (members);
_clutter_script_construct_object (script, oinfo);
_clutter_script_apply_properties (script, oinfo);
retval = CLUTTER_TIMELINE (oinfo->object);
/* we transfer ownership to the alpha function later */
oinfo->is_toplevel = FALSE;
object_info_free (oinfo);
return retval;
}
/* define the names of the animation modes to match the ones
* that developers might be more accustomed to
*/
static const struct
{
const gchar *name;
ClutterAnimationMode mode;
} animation_modes[] = {
{ "linear", CLUTTER_LINEAR },
{ "easeInQuad", CLUTTER_EASE_IN_QUAD },
{ "easeOutQuad", CLUTTER_EASE_OUT_QUAD },
{ "easeInOutQuad", CLUTTER_EASE_IN_OUT_QUAD },
{ "easeInCubic", CLUTTER_EASE_IN_CUBIC },
{ "easeOutCubic", CLUTTER_EASE_OUT_CUBIC },
{ "easeInOutCubic", CLUTTER_EASE_IN_OUT_CUBIC },
{ "easeInQuart", CLUTTER_EASE_IN_QUART },
{ "easeOutQuart", CLUTTER_EASE_OUT_QUART },
{ "easeInOutQuart", CLUTTER_EASE_IN_OUT_QUART },
{ "easeInQuint", CLUTTER_EASE_IN_QUINT },
{ "easeOutQuint", CLUTTER_EASE_OUT_QUINT },
{ "easeInOutQuint", CLUTTER_EASE_IN_OUT_QUINT },
{ "easeInSine", CLUTTER_EASE_IN_SINE },
{ "easeOutSine", CLUTTER_EASE_OUT_SINE },
{ "easeInOutSine", CLUTTER_EASE_IN_OUT_SINE },
{ "easeInExpo", CLUTTER_EASE_IN_EXPO },
{ "easeOutExpo", CLUTTER_EASE_OUT_EXPO },
{ "easeInOutExpo", CLUTTER_EASE_IN_OUT_EXPO },
{ "easeInCirc", CLUTTER_EASE_IN_CIRC },
{ "easeOutCirc", CLUTTER_EASE_OUT_CIRC },
{ "easeInOutCirc", CLUTTER_EASE_IN_OUT_CIRC },
{ "easeInElastic", CLUTTER_EASE_IN_ELASTIC },
{ "easeOutElastic", CLUTTER_EASE_OUT_ELASTIC },
{ "easeInOutElastic", CLUTTER_EASE_IN_OUT_ELASTIC },
{ "easeInBack", CLUTTER_EASE_IN_BACK },
{ "easeOutBack", CLUTTER_EASE_OUT_BACK },
{ "easeInOutBack", CLUTTER_EASE_IN_OUT_BACK },
{ "easeInBounce", CLUTTER_EASE_IN_BOUNCE },
{ "easeOutBounce", CLUTTER_EASE_OUT_BOUNCE },
{ "easeInOutBounce", CLUTTER_EASE_IN_OUT_BOUNCE },
};
static const gint n_animation_modes = G_N_ELEMENTS (animation_modes);
gulong
clutter_script_resolve_animation_mode (const gchar *name)
{
gint i, res = 0;
/* XXX - we might be able to optimize by changing the ordering
* of the animation_modes array, e.g.
* - special casing linear
* - tokenizing ('ease', 'In', 'Sine') and matching on token
* - binary searching?
*/
for (i = 0; i < n_animation_modes; i++)
{
if (strcmp (animation_modes[i].name, name) == 0)
return animation_modes[i].mode;
}
if (clutter_script_enum_from_string (CLUTTER_TYPE_ANIMATION_MODE,
name, &res))
return res;
g_warning ("Unable to find the animation mode '%s'", name);
return CLUTTER_CUSTOM_MODE;
}
static ClutterAlphaFunc
resolve_alpha_func (const gchar *name)
{
static GModule *module = NULL;
ClutterAlphaFunc func;
CLUTTER_NOTE (SCRIPT, "Looking up '%s' alpha function", name);
if (G_UNLIKELY (!module))
module = g_module_open (NULL, G_MODULE_BIND_LAZY);
if (g_module_symbol (module, name, (gpointer) &func))
{
CLUTTER_NOTE (SCRIPT, "Found '%s' alpha function in the symbols table",
name);
return func;
}
return NULL;
}
GObject *
_clutter_script_parse_alpha (ClutterScript *script,
JsonNode *node)
{
GObject *retval = NULL;
JsonObject *object;
ClutterTimeline *timeline = NULL;
ClutterAlphaFunc alpha_func = NULL;
ClutterAnimationMode mode = CLUTTER_CUSTOM_MODE;
JsonNode *val;
gboolean unref_timeline = FALSE;
if (JSON_NODE_TYPE (node) != JSON_NODE_OBJECT)
return NULL;
object = json_node_get_object (node);
val = json_object_get_member (object, "timeline");
if (val)
{
if (JSON_NODE_TYPE (val) == JSON_NODE_VALUE &&
json_node_get_string (val) != NULL)
{
const gchar *id = json_node_get_string (val);
timeline =
CLUTTER_TIMELINE (clutter_script_get_object (script, id));
}
else if (JSON_NODE_TYPE (val) == JSON_NODE_OBJECT)
{
timeline = construct_timeline (script, json_node_get_object (val));
unref_timeline = TRUE;
}
}
val = json_object_get_member (object, "mode");
if (val && json_node_get_string (val) != NULL)
mode = clutter_script_resolve_animation_mode (json_node_get_string (val));
if (mode == CLUTTER_CUSTOM_MODE)
{
val = json_object_get_member (object, "function");
if (val && json_node_get_string (val) != NULL)
{
alpha_func = resolve_alpha_func (json_node_get_string (val));
if (!alpha_func)
{
g_warning ("Unable to find the function '%s' in the "
"Clutter alpha functions or the symbols table",
json_node_get_string (val));
}
}
}
CLUTTER_NOTE (SCRIPT, "Parsed alpha: %s timeline (%p) (mode:%d, func:%p)",
unref_timeline ? "implicit" : "explicit",
timeline ? timeline : 0x0,
mode != CLUTTER_CUSTOM_MODE ? mode : 0,
alpha_func ? alpha_func : 0x0);
retval = g_object_new (CLUTTER_TYPE_ALPHA, NULL);
if (mode != CLUTTER_CUSTOM_MODE)
clutter_alpha_set_mode (CLUTTER_ALPHA (retval), mode);
if (alpha_func != NULL)
clutter_alpha_set_func (CLUTTER_ALPHA (retval), alpha_func, NULL, NULL);
clutter_alpha_set_timeline (CLUTTER_ALPHA (retval), timeline);
if (unref_timeline)
g_object_unref (timeline);
return retval;
}
static void
clutter_script_parser_object_end (JsonParser *json_parser,
JsonObject *object)
{
ClutterScriptParser *parser = CLUTTER_SCRIPT_PARSER (json_parser);
ClutterScript *script = parser->script;
ObjectInfo *oinfo;
JsonNode *val;
const gchar *id;
GList *members, *l;
if (!json_object_has_member (object, "id"))
{
gchar *fake;
if (!json_object_has_member (object, "type"))
return;
fake = _clutter_script_generate_fake_id (script);
val = json_node_new (JSON_NODE_VALUE);
json_node_set_string (val, fake);
json_object_set_member (object, "id", val);
g_free (fake);
}
if (!json_object_has_member (object, "type"))
{
val = json_object_get_member (object, "id");
_clutter_script_warn_missing_attribute (script,
json_node_get_string (val),
"type");
return;
}
id = json_object_get_string_member (object, "id");
oinfo = _clutter_script_get_object_info (script, id);
if (G_LIKELY (!oinfo))
{
const gchar *class_name;
oinfo = g_slice_new0 (ObjectInfo);
oinfo->merge_id = _clutter_script_get_last_merge_id (script);
oinfo->id = g_strdup (id);
class_name = json_object_get_string_member (object, "type");
oinfo->class_name = g_strdup (class_name);
if (json_object_has_member (object, "type_func"))
{
const gchar *type_func;
type_func = json_object_get_string_member (object, "type_func");
oinfo->type_func = g_strdup (type_func);
json_object_remove_member (object, "type_func");
}
}
if (json_object_has_member (object, "children"))
{
val = json_object_get_member (object, "children");
oinfo->children = parse_children (oinfo, val);
json_object_remove_member (object, "children");
}
if (json_object_has_member (object, "behaviours"))
{
val = json_object_get_member (object, "behaviours");
oinfo->behaviours = parse_behaviours (oinfo, val);
json_object_remove_member (object, "behaviours");
}
if (json_object_has_member (object, "signals"))
{
val = json_object_get_member (object, "signals");
oinfo->signals = parse_signals (script, oinfo, val);
json_object_remove_member (object, "signals");
}
if (strcmp (oinfo->class_name, "ClutterStage") == 0 &&
json_object_has_member (object, "is-default"))
{
oinfo->is_stage_default =
json_object_get_boolean_member (object, "is-default");
json_object_remove_member (object, "is-default");
}
else
oinfo->is_stage_default = FALSE;
oinfo->is_toplevel = FALSE;
oinfo->is_unmerged = FALSE;
oinfo->has_unresolved = TRUE;
members = json_object_get_members (object);
for (l = members; l; l = l->next)
{
const gchar *name = l->data;
PropertyInfo *pinfo;
JsonNode *node;
/* we have already parsed these */
if (strcmp (name, "id") == 0 || strcmp (name, "type") == 0)
continue;
node = json_object_get_member (object, name);
pinfo = g_slice_new (PropertyInfo);
pinfo->name = g_strdup (name);
pinfo->node = json_node_copy (node);
pinfo->pspec = NULL;
pinfo->is_child = g_str_has_prefix (name, "child::") ? TRUE : FALSE;
oinfo->properties = g_list_prepend (oinfo->properties, pinfo);
}
g_list_free (members);
CLUTTER_NOTE (SCRIPT,
"Added object '%s' (type:%s, id:%d, props:%d, signals:%d)",
oinfo->id,
oinfo->class_name,
oinfo->merge_id,
g_list_length (oinfo->properties),
g_list_length (oinfo->signals));
_clutter_script_add_object_info (script, oinfo);
_clutter_script_construct_object (script, oinfo);
}
static void
clutter_script_parser_parse_end (JsonParser *parser)
{
clutter_script_ensure_objects (CLUTTER_SCRIPT_PARSER (parser)->script);
}
gboolean
clutter_script_parse_node (ClutterScript *script,
GValue *value,
const gchar *name,
JsonNode *node,
GParamSpec *pspec)
{
GValue node_value = { 0, };
gboolean retval = FALSE;
g_return_val_if_fail (CLUTTER_IS_SCRIPT (script), FALSE);
g_return_val_if_fail (name != NULL, FALSE);
g_return_val_if_fail (node != NULL, FALSE);
switch (JSON_NODE_TYPE (node))
{
case JSON_NODE_OBJECT:
/* if we don't have a GParamSpec we can't infer the type
* of the property; this usually means that this property
* is a custom member that will be parsed by the Scriptable
* interface implementantion
*/
if (pspec == NULL)
return FALSE;
else
{
GType p_type = G_PARAM_SPEC_VALUE_TYPE (pspec);
ObjectInfo *oinfo;
const gchar *id;
g_value_init (value, p_type);
if (g_type_is_a (p_type, G_TYPE_OBJECT))
{
/* default GObject handling: we get the id and
* retrieve the ObjectInfo for it; since the object
* definitions are parsed leaf-first we are guaranteed
* to have a defined object at this point
*/
id = get_id_from_node (node);
if (id == NULL || *id == '\0')
return FALSE;
oinfo = _clutter_script_get_object_info (script, id);
if (oinfo == NULL || oinfo->gtype == G_TYPE_INVALID )
return FALSE;
if (g_type_is_a (oinfo->gtype, p_type))
{
/* force construction, even though it should
* not be necessary; we don't need the properties
* to be applied as well: they will when the
* ScriptParser finishes
*/
_clutter_script_construct_object (script, oinfo);
g_value_set_object (value, oinfo->object);
return TRUE;
}
}
else if (p_type == CLUTTER_TYPE_KNOT)
{
ClutterKnot knot = { 0, };
/* knot := { "x" : (int), "y" : (int) } */
if (clutter_script_parse_knot (script, node, &knot))
{
g_value_set_boxed (value, &knot);
return TRUE;
}
}
else if (p_type == CLUTTER_TYPE_GEOMETRY)
{
ClutterGeometry geom = { 0, };
/* geometry := {
* "x" : (int),
* "y" : (int),
* "width" : (int),
* "height" : (int)
* }
*/
if (clutter_script_parse_geometry (script, node, &geom))
{
g_value_set_boxed (value, &geom);
return TRUE;
}
}
else if (p_type == CLUTTER_TYPE_COLOR)
{
ClutterColor color = { 0, };
/* color := {
* "red" : (int),
* "green" : (int),
* "blue" : (int),
* "alpha" : (int)
* }
*/
if (clutter_script_parse_color (script, node, &color))
{
g_value_set_boxed (value, &color);
return TRUE;
}
}
}
return FALSE;
case JSON_NODE_ARRAY:
if (!pspec)
return FALSE;
else
{
g_value_init (value, G_PARAM_SPEC_VALUE_TYPE (pspec));
if (G_VALUE_HOLDS (value, CLUTTER_TYPE_KNOT))
{
ClutterKnot knot = { 0, };
/* knot := [ (int), (int) ] */
if (clutter_script_parse_knot (script, node, &knot))
{
g_value_set_boxed (value, &knot);
return TRUE;
}
}
else if (G_VALUE_HOLDS (value, CLUTTER_TYPE_GEOMETRY))
{
ClutterGeometry geom = { 0, };
/* geometry := [ (int), (int), (int), (int) ] */
if (clutter_script_parse_geometry (script, node, &geom))
{
g_value_set_boxed (value, &geom);
return TRUE;
}
}
else if (CLUTTER_VALUE_HOLDS_COLOR (value))
{
ClutterColor color = { 0, };
/* color := [ (int), (int), (int), (int) ] */
if (clutter_script_parse_color (script, node, &color))
{
g_value_set_boxed (value, &color);
return TRUE;
}
}
else if (G_VALUE_HOLDS (value, G_TYPE_STRV))
{
JsonArray *array = json_node_get_array (node);
guint i, array_len = json_array_get_length (array);
GPtrArray *str_array = g_ptr_array_sized_new (array_len);
/* strv := [ (str), (str), ... ] */
for (i = 0; i < array_len; i++)
{
JsonNode *val = json_array_get_element (array, i);
if (JSON_NODE_TYPE (val) != JSON_NODE_VALUE &&
json_node_get_string (val) == NULL)
continue;
g_ptr_array_add (str_array,
(gpointer) json_node_get_string (val));
}
g_value_set_boxed (value, str_array->pdata);
g_ptr_array_free (str_array, TRUE);
return TRUE;
}
}
return FALSE;
case JSON_NODE_NULL:
return FALSE;
case JSON_NODE_VALUE:
json_node_get_value (node, &node_value);
if (pspec)
g_value_init (value, G_PARAM_SPEC_VALUE_TYPE (pspec));
else
g_value_init (value, G_VALUE_TYPE (&node_value));
switch (G_TYPE_FUNDAMENTAL (G_VALUE_TYPE (value)))
{
/* fundamental JSON types */
case G_TYPE_INT64:
case G_TYPE_DOUBLE:
case G_TYPE_STRING:
case G_TYPE_BOOLEAN:
g_value_copy (&node_value, value);
retval = TRUE;
break;
case G_TYPE_INT:
g_value_set_int (value, g_value_get_int64 (&node_value));
retval = TRUE;
break;
case G_TYPE_UINT:
g_value_set_uint (value, (guint) g_value_get_int64 (&node_value));
retval = TRUE;
break;
case G_TYPE_ULONG:
g_value_set_ulong (value, (gulong) g_value_get_int64 (&node_value));
retval = TRUE;
break;
case G_TYPE_UCHAR:
g_value_set_uchar (value, (guchar) g_value_get_int64 (&node_value));
retval = TRUE;
break;
case G_TYPE_FLOAT:
if (G_VALUE_HOLDS (&node_value, G_TYPE_DOUBLE))
{
g_value_set_float (value, g_value_get_double (&node_value));
retval = TRUE;
}
else if (G_VALUE_HOLDS (&node_value, G_TYPE_INT64))
{
g_value_set_float (value, g_value_get_int64 (&node_value));
retval = TRUE;
}
break;
case G_TYPE_ENUM:
if (G_VALUE_HOLDS (&node_value, G_TYPE_INT64))
{
g_value_set_enum (value, g_value_get_int64 (&node_value));
retval = TRUE;
}
else if (G_VALUE_HOLDS (&node_value, G_TYPE_STRING))
{
gint enum_value;
retval = clutter_script_enum_from_string (G_VALUE_TYPE (value),
g_value_get_string (&node_value),
&enum_value);
if (retval)
g_value_set_enum (value, enum_value);
}
break;
case G_TYPE_FLAGS:
if (G_VALUE_HOLDS (&node_value, G_TYPE_INT64))
{
g_value_set_flags (value, g_value_get_int64 (&node_value));
retval = TRUE;
}
else if (G_VALUE_HOLDS (&node_value, G_TYPE_STRING))
{
gint flags_value;
retval = clutter_script_flags_from_string (G_VALUE_TYPE (value),
g_value_get_string (&node_value),
&flags_value);
if (retval)
g_value_set_flags (value, flags_value);
}
break;
case G_TYPE_BOXED:
if (G_VALUE_HOLDS (value, CLUTTER_TYPE_COLOR))
{
ClutterColor color = { 0, };
retval = clutter_script_parse_color (script, node, &color);
if (retval)
clutter_value_set_color (value, &color);
}
break;
case G_TYPE_OBJECT:
if (G_VALUE_HOLDS (&node_value, G_TYPE_STRING))
{
const gchar *str = g_value_get_string (&node_value);
GObject *object = clutter_script_get_object (script, str);
if (object)
{
CLUTTER_NOTE (SCRIPT,
"Assigning '%s' (%s) to property '%s'",
str,
G_OBJECT_TYPE_NAME (object),
name);
g_value_set_object (value, object);
retval = TRUE;
}
}
break;
default:
retval = FALSE;
break;
}
g_value_unset (&node_value);
break;
}
return retval;
}
static GList *
clutter_script_translate_parameters (ClutterScript *script,
GObject *object,
const gchar *name,
GList *properties,
GArray **params)
{
ClutterScriptable *scriptable = NULL;
ClutterScriptableIface *iface = NULL;
GList *l, *unparsed;
gboolean parse_custom = FALSE;
*params = g_array_new (FALSE, FALSE, sizeof (GParameter));
if (CLUTTER_IS_SCRIPTABLE (object))
{
scriptable = CLUTTER_SCRIPTABLE (object);
iface = CLUTTER_SCRIPTABLE_GET_IFACE (scriptable);
if (iface->parse_custom_node)
parse_custom = TRUE;
}
unparsed = NULL;
for (l = properties; l != NULL; l = l->next)
{
PropertyInfo *pinfo = l->data;
GParameter param = { NULL };
gboolean res = FALSE;
if (pinfo->is_child)
{
CLUTTER_NOTE (SCRIPT, "Child property '%s' ignored", pinfo->name);
unparsed = g_list_prepend (unparsed, pinfo);
continue;
}
CLUTTER_NOTE (SCRIPT, "Parsing %s property (id:%s)",
pinfo->pspec ? "regular" : "custom",
pinfo->name);
if (parse_custom)
res = iface->parse_custom_node (scriptable, script, &param.value,
pinfo->name,
pinfo->node);
if (!res)
res = clutter_script_parse_node (script, &param.value,
pinfo->name,
pinfo->node,
pinfo->pspec);
if (!res)
{
CLUTTER_NOTE (SCRIPT, "Property '%s' ignored", pinfo->name);
unparsed = g_list_prepend (unparsed, pinfo);
continue;
}
param.name = g_strdup (pinfo->name);
g_array_append_val (*params, param);
property_info_free (pinfo);
}
g_list_free (properties);
return unparsed;
}
static GList *
clutter_script_construct_parameters (ClutterScript *script,
GType gtype,
const gchar *name,
GList *properties,
GArray **construct_params)
{
GObjectClass *klass;
GList *l, *unparsed;
klass = g_type_class_ref (gtype);
g_assert (klass != NULL);
*construct_params = g_array_new (FALSE, FALSE, sizeof (GParameter));
unparsed = NULL;
for (l = properties; l != NULL; l = l->next)
{
PropertyInfo *pinfo = l->data;
GParameter param = { NULL };
GParamSpec *pspec = NULL;
/* we allow custom property names for classes, so if we
* don't find a corresponding GObject property for this
* class we just skip it and let the class itself deal
* with it later on
*/
pspec = g_object_class_find_property (klass, pinfo->name);
if (pspec)
pinfo->pspec = g_param_spec_ref (pspec);
else
{
pinfo->pspec = NULL;
unparsed = g_list_prepend (unparsed, pinfo);
continue;
}
if (!(pspec->flags & G_PARAM_CONSTRUCT_ONLY))
{
unparsed = g_list_prepend (unparsed, pinfo);
continue;
}
param.name = g_strdup (pinfo->name);
if (!clutter_script_parse_node (script, &param.value,
pinfo->name,
pinfo->node,
pinfo->pspec))
{
unparsed = g_list_prepend (unparsed, pinfo);
continue;
}
g_array_append_val (*construct_params, param);
property_info_free (pinfo);
}
g_list_free (properties);
g_type_class_unref (klass);
return unparsed;
}
static void
apply_child_properties (ClutterScript *script,
ClutterContainer *container,
ClutterActor *actor,
ObjectInfo *oinfo)
{
ClutterScriptable *scriptable = NULL;
ClutterScriptableIface *iface = NULL;
gboolean set_custom_property = FALSE;
gboolean parse_custom_node = FALSE;
GList *l, *unresolved, *properties;
GObjectClass *klass;
GType meta_type;
meta_type = CLUTTER_CONTAINER_GET_IFACE (container)->child_meta_type;
if (meta_type == G_TYPE_INVALID)
return;
klass = G_OBJECT_GET_CLASS (container);
/* shortcut, to avoid typechecking every time */
if (CLUTTER_IS_SCRIPTABLE (container))
{
scriptable = CLUTTER_SCRIPTABLE (container);
iface = CLUTTER_SCRIPTABLE_GET_IFACE (scriptable);
parse_custom_node = iface->parse_custom_node != NULL ? TRUE : FALSE;
set_custom_property = iface->set_custom_property != NULL ? TRUE : FALSE;
}
properties = oinfo->properties;
oinfo->properties = NULL;
unresolved = NULL;
for (l = properties; l != NULL; l = l->next)
{
PropertyInfo *pinfo = l->data;
GValue value = { 0, };
const gchar *name;
gboolean res;
if (!pinfo->is_child)
{
unresolved = g_list_prepend (unresolved, pinfo);
continue;
}
name = pinfo->name + strlen ("child::");
pinfo->pspec =
clutter_container_class_find_child_property (klass, name);
if (pinfo->pspec != NULL)
g_param_spec_ref (pinfo->pspec);
CLUTTER_NOTE (SCRIPT, "Parsing %s child property (id:%s)",
pinfo->pspec != NULL ? "regular" : "custom",
name);
if (parse_custom_node)
res = iface->parse_custom_node (scriptable, script, &value,
name,
pinfo->node);
if (!res)
res = clutter_script_parse_node (script, &value,
name,
pinfo->node,
pinfo->pspec);
if (!res)
{
CLUTTER_NOTE (SCRIPT, "Child property '%s' ignored", name);
unresolved = g_list_prepend (unresolved, pinfo);
continue;
}
CLUTTER_NOTE (SCRIPT,
"Setting %s child property '%s' (type:%s) to "
"object '%s' (id:%s)",
set_custom_property ? "custom" : "regular",
name,
g_type_name (G_VALUE_TYPE (&value)),
g_type_name (oinfo->gtype),
oinfo->id);
clutter_container_child_set_property (container, actor,
name,
&value);
g_value_unset (&value);
property_info_free (pinfo);
}
g_list_free (properties);
oinfo->properties = unresolved;
}
static void
apply_behaviours (ClutterScript *script,
ObjectInfo *oinfo)
{
ClutterActor *actor = CLUTTER_ACTOR (oinfo->object);
GList *l, *unresolved;
unresolved = NULL;
for (l = oinfo->behaviours; l != NULL; l = l->next)
{
const gchar *name = l->data;
ObjectInfo *behaviour_info;
GObject *object = NULL;
behaviour_info = _clutter_script_get_object_info (script, name);
if (behaviour_info != NULL)
{
_clutter_script_construct_object (script, behaviour_info);
object = behaviour_info->object;
}
if (object == NULL)
{
unresolved = g_list_prepend (unresolved, g_strdup (name));
continue;
}
CLUTTER_NOTE (SCRIPT, "Applying behaviour '%s' to actor of type '%s'",
name,
g_type_name (G_OBJECT_TYPE (actor)));
clutter_behaviour_apply (CLUTTER_BEHAVIOUR (object), actor);
}
g_list_foreach (oinfo->behaviours, (GFunc) g_free, NULL);
g_list_free (oinfo->behaviours);
oinfo->behaviours = unresolved;
}
static void
add_children (ClutterScript *script,
ObjectInfo *oinfo)
{
ClutterContainer *container = CLUTTER_CONTAINER (oinfo->object);
GList *l, *unresolved;
unresolved = NULL;
for (l = oinfo->children; l != NULL; l = l->next)
{
const gchar *name = l->data;
GObject *object = NULL;
ObjectInfo *child_info;
child_info = _clutter_script_get_object_info (script, name);
if (child_info != NULL)
{
_clutter_script_construct_object (script, child_info);
object = child_info->object;
}
if (object == NULL)
{
unresolved = g_list_prepend (unresolved, g_strdup (name));
continue;
}
CLUTTER_NOTE (SCRIPT, "Adding children '%s' to actor of type '%s'",
name,
g_type_name (G_OBJECT_TYPE (container)));
clutter_container_add_actor (container, CLUTTER_ACTOR (object));
apply_child_properties (script,
container, CLUTTER_ACTOR (object),
child_info);
}
g_list_foreach (oinfo->children, (GFunc) g_free, NULL);
g_list_free (oinfo->children);
oinfo->children = unresolved;
}
/* top-level classes: these classes are the roots of the
* hiearchy; some of them must be unreferenced, whilst
* others are owned by other instances
*/
static const struct
{
const gchar *type_name;
guint is_toplevel : 1;
} clutter_toplevels[] = {
{ "ClutterActor", FALSE },
{ "ClutterAlpha", FALSE },
{ "ClutterBehaviour", TRUE },
{ "ClutterEffectTemplate", TRUE },
{ "ClutterModel", TRUE },
{ "ClutterScore", TRUE },
{ "ClutterTimeline", TRUE }
};
static guint n_clutter_toplevels = G_N_ELEMENTS (clutter_toplevels);
static inline void
_clutter_script_check_unresolved (ClutterScript *script,
ObjectInfo *oinfo)
{
if (oinfo->children != NULL && CLUTTER_IS_CONTAINER (oinfo->object))
add_children (script, oinfo);
if (oinfo->behaviours != NULL && CLUTTER_IS_ACTOR (oinfo->object))
apply_behaviours (script, oinfo);
if (oinfo->properties || oinfo->children || oinfo->behaviours)
oinfo->has_unresolved = TRUE;
else
oinfo->has_unresolved = FALSE;
}
void
_clutter_script_apply_properties (ClutterScript *script,
ObjectInfo *oinfo)
{
ClutterScriptable *scriptable = NULL;
ClutterScriptableIface *iface = NULL;
gboolean set_custom_property = FALSE;
GObject *object = oinfo->object;
GList *properties;
GArray *params;
guint i;
if (!oinfo->has_unresolved)
return;
/* shortcut, to avoid typechecking every time */
if (CLUTTER_IS_SCRIPTABLE (object))
{
scriptable = CLUTTER_SCRIPTABLE (object);
iface = CLUTTER_SCRIPTABLE_GET_IFACE (scriptable);
if (iface->set_custom_property)
set_custom_property = TRUE;
}
/* then we get the rest of the parameters, asking the object itself
* to translate them for us, if we cannot do that
*/
properties = oinfo->properties;
oinfo->properties = clutter_script_translate_parameters (script,
object,
oinfo->id,
properties,
&params);
/* consume all the properties we could translate in this pass */
for (i = 0; i < params->len; i++)
{
GParameter *param = &g_array_index (params, GParameter, i);
CLUTTER_NOTE (SCRIPT,
"Setting %s property '%s' (type:%s) to object '%s' (id:%s)",
set_custom_property ? "custom" : "regular",
param->name,
g_type_name (G_VALUE_TYPE (&param->value)),
g_type_name (oinfo->gtype),
oinfo->id);
if (set_custom_property)
iface->set_custom_property (scriptable, script,
param->name,
&param->value);
else
g_object_set_property (object, param->name, &param->value);
g_free ((gchar *) param->name);
g_value_unset (&param->value);
}
g_array_free (params, TRUE);
_clutter_script_check_unresolved (script, oinfo);
}
void
_clutter_script_construct_object (ClutterScript *script,
ObjectInfo *oinfo)
{
GArray *params;
guint i;
/* we have completely updated the object */
if (oinfo->object != NULL)
{
if (oinfo->has_unresolved)
_clutter_script_check_unresolved (script, oinfo);
return;
}
if (oinfo->gtype == G_TYPE_INVALID)
{
if (G_UNLIKELY (oinfo->type_func))
oinfo->gtype = clutter_script_get_type_from_symbol (oinfo->type_func);
else
oinfo->gtype = clutter_script_get_type_from_name (script, oinfo->class_name);
if (G_UNLIKELY (oinfo->gtype == G_TYPE_INVALID))
return;
for (i = 0; i < n_clutter_toplevels; i++)
{
const gchar *t_name = clutter_toplevels[i].type_name;
GType t_type;
t_type = clutter_script_get_type_from_name (script, t_name);
if (g_type_is_a (oinfo->gtype, t_type))
{
oinfo->is_toplevel = clutter_toplevels[i].is_toplevel;
break;
}
}
}
if (oinfo->gtype == CLUTTER_TYPE_STAGE && oinfo->is_stage_default)
{
GList *properties = oinfo->properties;
/* the default stage is a complex beast: we cannot create it using
* g_object_newv() but we need clutter_script_construct_parameters()
* to add the GParamSpec to the PropertyInfo pspec member, so
* that we don't have to implement every complex property (like
* the "color" one) directly inside the ClutterStage class.
*/
oinfo->properties =
clutter_script_construct_parameters (script,
oinfo->gtype,
oinfo->id,
properties,
&params);
oinfo->object = G_OBJECT (clutter_stage_get_default ());
for (i = 0; i < params->len; i++)
{
GParameter *param = &g_array_index (params, GParameter, i);
g_free ((gchar *) param->name);
g_value_unset (&param->value);
}
g_array_free (params, TRUE);
}
else
{
GList *properties = oinfo->properties;
/* every other object: first, we get the construction parameters */
oinfo->properties =
clutter_script_construct_parameters (script,
oinfo->gtype,
oinfo->id,
properties,
&params);
oinfo->object = g_object_newv (oinfo->gtype,
params->len,
(GParameter *) params->data);
for (i = 0; i < params->len; i++)
{
GParameter *param = &g_array_index (params, GParameter, i);
g_free ((gchar *) param->name);
g_value_unset (&param->value);
}
g_array_free (params, TRUE);
}
g_assert (oinfo->object != NULL);
if (CLUTTER_IS_SCRIPTABLE (oinfo->object))
clutter_scriptable_set_id (CLUTTER_SCRIPTABLE (oinfo->object), oinfo->id);
else
g_object_set_data_full (oinfo->object, "clutter-script-id",
g_strdup (oinfo->id),
g_free);
_clutter_script_check_unresolved (script, oinfo);
}
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