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mutter/clutter/clutter-script-parser.c
Emmanuele Bassi 2aa9d7bdc7 script: Copy the JSON node in PropertyInfo 
PropertyInfo should store a copy of the JsonNodes it references, so
that property_info_free() can safely dispose them, and we can reference
values across different UI definition data.

The implicit timeline parsing code is not copying the JsonNode; this
leads to a double free in some cases, which is masked by the GSlice
allocator and produces a heap corruption later on.
2010-01-05 10:55:28 +00:00

1883 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, 0);
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, 0);
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 = json_node_copy (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, 0);
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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