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pjs/lib/libmocha/lm_img.c

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23 KiB
C
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
* Image reflection and event notification
*
* Scott Furman, 3/30/96
*/
#include "lm.h"
#include "lo_ele.h"
#include "prtypes.h"
#include "pa_tags.h"
#include "layout.h"
#define IL_CLIENT
#include "libimg.h" /* Image Library public API. */
enum image_array_slot {
IMAGE_ARRAY_LENGTH = -1
};
static JSPropertySpec image_array_props[] = {
{lm_length_str, IMAGE_ARRAY_LENGTH,
JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT},
{0}
};
extern JSClass lm_image_array_class;
PR_STATIC_CALLBACK(JSBool)
image_array_getProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
JSObjectArray *array;
MochaDecoder *decoder;
MWContext *context;
jsint count, slot;
LO_ImageStruct *image;
int32 active_layer_id;
if (!JSVAL_IS_INT(id))
return JS_TRUE;
slot = JSVAL_TO_INT(id);
array = JS_GetInstancePrivate(cx, obj, &lm_image_array_class, NULL);
if (!array)
return JS_TRUE;
decoder = array->decoder;
context = decoder->window_context;
if (!context)
return JS_TRUE;
LO_LockLayout();
switch (slot) {
case IMAGE_ARRAY_LENGTH:
active_layer_id = LM_GetActiveLayer(context);
LM_SetActiveLayer(context, array->layer_id);
count = LO_EnumerateImages(context, array->layer_id);
LM_SetActiveLayer(context, active_layer_id);
if (count > array->length)
array->length = count;
*vp = INT_TO_JSVAL(count);
break;
default:
if (slot < 0) {
/* Don't mess with user-defined or method properties. */
LO_UnlockLayout();
return JS_TRUE;
}
if (slot >= array->length)
array->length = slot + 1;
image = LO_GetImageByIndex(context, array->layer_id, (uint)slot);
if (image) {
*vp = OBJECT_TO_JSVAL(LM_ReflectImage(context, image, NULL,
array->layer_id,
(uint)slot));
}
break;
}
LO_UnlockLayout();
return JS_TRUE;
}
PR_STATIC_CALLBACK(void)
image_array_finalize(JSContext *cx, JSObject *obj)
{
JSObjectArray *array;
array = JS_GetPrivate(cx, obj);
if (!array)
return;
DROP_BACK_COUNT(array->decoder);
JS_free(cx, array);
}
JSClass lm_image_array_class = {
"ImageArray", JSCLASS_HAS_PRIVATE,
JS_PropertyStub, JS_PropertyStub,
image_array_getProperty, image_array_getProperty, JS_EnumerateStub,
JS_ResolveStub, JS_ConvertStub, image_array_finalize
};
enum image_slot {
IMAGE_NAME = -2,
IMAGE_SRC = -3,
IMAGE_LOWSRC = -4,
IMAGE_X = -5,
IMAGE_Y = -6,
IMAGE_HEIGHT = -7,
IMAGE_WIDTH = -8,
IMAGE_BORDER = -9,
IMAGE_VSPACE = -10,
IMAGE_HSPACE = -11,
IMAGE_COMPLETE = -12
};
static JSPropertySpec image_props[] = {
{"name", IMAGE_NAME, JSPROP_ENUMERATE | JSPROP_READONLY},
{"src", IMAGE_SRC, JSPROP_ENUMERATE},
{"lowsrc", IMAGE_LOWSRC, JSPROP_ENUMERATE},
{"x", IMAGE_X, JSPROP_ENUMERATE | JSPROP_READONLY},
{"y", IMAGE_Y, JSPROP_ENUMERATE | JSPROP_READONLY},
{"height", IMAGE_HEIGHT, JSPROP_ENUMERATE | JSPROP_READONLY},
{"width", IMAGE_WIDTH, JSPROP_ENUMERATE | JSPROP_READONLY},
{"border", IMAGE_BORDER, JSPROP_ENUMERATE | JSPROP_READONLY},
{"vspace", IMAGE_VSPACE, JSPROP_ENUMERATE | JSPROP_READONLY},
{"hspace", IMAGE_HSPACE, JSPROP_ENUMERATE | JSPROP_READONLY},
{"complete", IMAGE_COMPLETE, JSPROP_ENUMERATE | JSPROP_READONLY},
{0}
};
/*
* Base image element type.
*/
typedef struct JSImage {
JSEventReceiver receiver;
MochaDecoder *decoder;
LO_ImageStruct *image_data; /* 0 unless made by new Image() */
uint8 pending_events;
int32 layer_id;
uint index;
JSBool complete; /* Finished loading or aborted */
JSString *name;
} JSImage;
#define GET_IMAGE_DATA(context, image) \
((image)->image_data ? (image)->image_data \
: LO_GetImageByIndex((context), (image)->layer_id, (image)->index))
extern JSClass lm_image_class;
/*
* Force the mozilla event queue to flush to make sure any image-set-src
* events have been processed
*/
PR_STATIC_CALLBACK(void)
lm_img_src_sync(void * data)
{
}
PR_STATIC_CALLBACK(JSBool)
image_getProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
JSImage *image;
LO_ImageStruct *image_data;
enum image_slot image_slot;
JSString *str;
jsint slot;
if (!JSVAL_IS_INT(id))
return JS_TRUE;
slot = JSVAL_TO_INT(id);
image = JS_GetInstancePrivate(cx, obj, &lm_image_class, NULL);
if (!image)
return JS_TRUE;
image_data = GET_IMAGE_DATA(image->decoder->window_context, image);
if (!image_data)
return JS_TRUE; /* Try to handle this case gracefully. */
image_slot = slot;
if (image_slot == IMAGE_SRC || image_slot == IMAGE_LOWSRC) {
if (!lm_CheckPermissions(cx, obj, JSTARGET_UNIVERSAL_BROWSER_READ))
return JS_FALSE;
}
switch (image_slot) {
case IMAGE_NAME:
if (image->name)
*vp = STRING_TO_JSVAL(image->name);
else
*vp = JSVAL_NULL;
break;
case IMAGE_SRC:
if (image_data->pending_mocha_event) {
ET_moz_CallFunction(lm_img_src_sync, NULL);
image_data->pending_mocha_event = PR_FALSE;
}
str = JS_NewStringCopyZ(cx, (char*)image_data->image_url);
if (!str)
return JS_FALSE;
*vp = STRING_TO_JSVAL(str);
break;
case IMAGE_LOWSRC:
if (image_data->pending_mocha_event) {
ET_moz_CallFunction(lm_img_src_sync, NULL);
image_data->pending_mocha_event = PR_FALSE;
}
str = JS_NewStringCopyZ(cx, (char*)image_data->lowres_image_url);
if (!str)
return JS_FALSE;
*vp = STRING_TO_JSVAL(str);
break;
case IMAGE_X:
*vp = INT_TO_JSVAL(image_data->x + image_data->x_offset);
break;
case IMAGE_Y:
*vp = INT_TO_JSVAL(image_data->y + image_data->y_offset);
break;
case IMAGE_HEIGHT:
*vp = INT_TO_JSVAL(image_data->height);
break;
case IMAGE_WIDTH:
*vp = INT_TO_JSVAL(image_data->width);
break;
case IMAGE_BORDER:
*vp = INT_TO_JSVAL(image_data->border_width);
break;
case IMAGE_HSPACE:
*vp = INT_TO_JSVAL(image_data->border_horiz_space);
break;
case IMAGE_VSPACE:
*vp = INT_TO_JSVAL(image_data->border_vert_space);
break;
case IMAGE_COMPLETE:
*vp = BOOLEAN_TO_JSVAL(image->complete);
break;
default:
/* Don't mess with a user-defined or method property. */
return JS_TRUE;
}
return JS_TRUE;
}
static JSBool
image_set_src(JSImage *image, const char *str, LO_ImageStruct *image_data)
{
MochaDecoder *decoder;
MWContext *context;
IL_GroupContext *img_cx;
decoder = image->decoder;
context = decoder->window_context;
img_cx = decoder->image_context;
if (!context) return JS_TRUE;
image_data->pending_mocha_event = PR_TRUE;
image_data->image_attr->attrmask |= LO_ATTR_MOCHA_IMAGE;
ET_il_GetImage(str, context, img_cx, image_data, NET_DONT_RELOAD);
return JS_TRUE;
}
PR_STATIC_CALLBACK(JSBool)
image_setProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
JSBool ok=JS_FALSE;
JSImage *image;
MochaDecoder *decoder;
MWContext *context;
LO_ImageStruct *image_data;
enum image_slot image_slot;
const char *url;
jsint slot;
image = JS_GetInstancePrivate(cx, obj, &lm_image_class, NULL);
if (!image)
return JS_TRUE;
decoder = image->decoder;
context = decoder->window_context;
if (!context)
return JS_TRUE;
if (!JSVAL_IS_INT(id))
return JS_TRUE;
slot = JSVAL_TO_INT(id);
image_data = GET_IMAGE_DATA(context, image);
if (!image_data)
return JS_TRUE; /* Try to handle this case gracefully. */
image_slot = slot;
switch (image_slot) {
case IMAGE_SRC:
case IMAGE_LOWSRC:
if (!lm_CheckPermissions(cx, obj, JSTARGET_UNIVERSAL_BROWSER_WRITE))
return JS_FALSE;
if (JSVAL_IS_NULL(*vp)) {
url = NULL;
} else {
if (!JSVAL_IS_STRING(*vp) &&
!JS_ConvertValue(cx, *vp, JSTYPE_STRING, vp))
return JS_FALSE;
url = JS_GetStringBytes(JSVAL_TO_STRING(*vp));
url = lm_CheckURL(cx, url, JS_TRUE); /* will allocate new string */
if (!url)
return JS_FALSE;
}
if (image_slot == IMAGE_SRC) {
ok = image_set_src(image, url, image_data);
} else if (url) {
ok = lm_SaveParamString(cx, &image_data->lowres_image_url, url);
}
if (url)
XP_FREE((void *) url);
if (!ok)
return JS_FALSE;
/*
* don't call image_getProperty so that we don't immediately
* turn around and block
*/
return JS_TRUE;
break;
case IMAGE_NAME:
case IMAGE_X:
case IMAGE_Y:
case IMAGE_HEIGHT:
case IMAGE_WIDTH:
case IMAGE_BORDER:
case IMAGE_VSPACE:
case IMAGE_HSPACE:
case IMAGE_COMPLETE:
/* These are immutable. */
break;
}
return image_getProperty(cx, obj, id, vp);
}
PR_STATIC_CALLBACK(void)
image_finalize(JSContext *cx, JSObject *obj)
{
JSImage *image;
LO_ImageStruct *image_data;
MochaDecoder *decoder;
MWContext *context;
image = JS_GetPrivate(cx, obj);
if (!image)
return;
image_data = image->image_data;
decoder = image->decoder;
context = decoder->window_context;
if (image_data) {
/* If this is a layer background image or a reflection of an
existing layout image, then layout will take care of
destroying the image. For anonymous images, however,
we need to handle destruction here. */
if (!image_data->layer) {
ET_PostFreeImageElement(context, image_data);
XP_FREE(image_data->image_attr);
XP_FREE(image_data);
}
} else {
if (context) {
LO_LockLayout();
image_data = LO_GetImageByIndex(context, image->layer_id,
image->index);
if (image_data && image_data->mocha_object == obj)
image_data->mocha_object = NULL;
LO_UnlockLayout();
}
}
DROP_BACK_COUNT(decoder);
JS_UnlockGCThing(cx, image->name);
JS_free(cx, image);
}
JSClass lm_image_class = {
"Image", JSCLASS_HAS_PRIVATE,
JS_PropertyStub, JS_PropertyStub, image_getProperty, image_setProperty,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, image_finalize
};
/* Fill in native, private part of JS image */
static JSImage *
init_image_object(JSContext *cx, JSObject *obj, LO_ImageStruct *image_data)
{
JSImage *image;
MochaDecoder *decoder;
image = JS_malloc(cx, sizeof *image);
if (!image)
return NULL;
XP_BZERO(image, sizeof *image);
image->image_data = image_data;
decoder = JS_GetPrivate(cx, JS_GetGlobalObject(cx));
image->decoder = HOLD_BACK_COUNT(decoder);
image_data->mocha_object = obj;
/* Events are never blocked for anonymous images
since there is no associated layout. */
image->pending_events = PR_BIT(LM_IMGUNBLOCK);
if (!JS_SetPrivate(cx, obj, image))
return NULL;
return image;
}
JSObject *
lm_NewImage(JSContext *cx,
LO_ImageStruct *image_data)
{
JSObject *obj, *outer_obj;
MochaDecoder *decoder;
decoder = JS_GetPrivate(cx, JS_GetGlobalObject(cx));
outer_obj = lm_GetOuterObject(decoder);
obj = JS_NewObject(cx, &lm_image_class, decoder->image_prototype,
outer_obj);
if (!init_image_object(cx, obj, image_data))
return NULL;
return obj;
}
PR_STATIC_CALLBACK(JSBool)
Image(JSContext *cx, JSObject *obj, uint argc, jsval *argv, jsval *rval)
{
jsint width, height;
LO_ImageStruct *image_data;
XP_ASSERT(JS_InstanceOf(cx, obj, &lm_image_class, NULL));
height = width = 0;
if (argc > 0) {
if (argc != 2) {
JS_ReportError(cx, lm_argc_err_str);
return JS_FALSE;
}
if (!JSVAL_IS_INT(argv[0]) ||
!JSVAL_IS_INT(argv[1])) {
return JS_FALSE;
}
width = JSVAL_TO_INT(argv[0]);
height = JSVAL_TO_INT(argv[1]);
}
/* Allocate dummy layout structure. This is not really
used by layout, but the front-ends and the imagelib
need it as a handle on an image instance. */
image_data = XP_NEW_ZAP(LO_ImageStruct);
if (!image_data) {
JS_ReportOutOfMemory(cx);
return JS_FALSE;
}
image_data->image_attr = XP_NEW_ZAP(LO_ImageAttr);
if (!image_data->image_attr) {
XP_FREE(image_data);
JS_ReportOutOfMemory(cx);
return JS_FALSE;
}
image_data->type = LO_IMAGE;
/* Fake layout ID, guaranteed not to match any real layout element */
image_data->ele_id = -1;
if (!init_image_object(cx, obj, image_data)) {
XP_FREE(image_data->image_attr);
XP_FREE(image_data);
return JS_FALSE;
}
/* Process arguments */
/* Width & Height */
if (argc == 2) {
image_data->width = (int)width;
image_data->height = (int)height;
}
return JS_TRUE;
}
static JSObject *
reflect_image_array(MochaDecoder *decoder, JSObject *document)
{
JSContext *cx;
JSObjectArray *array;
JSObject *obj;
JSDocument *doc;
cx = decoder->js_context;
doc = JS_GetPrivate(cx, document);
if (!doc)
return NULL;
array = JS_malloc(cx, sizeof *array);
if (!array)
return NULL;
XP_BZERO(array, sizeof *array);
obj = JS_NewObject(cx, &lm_image_array_class, NULL, document);
if (!obj || !JS_SetPrivate(cx, obj, array)) {
LM_PutMochaDecoder(decoder);
return NULL;
}
if (!JS_DefineProperties(cx, obj, image_array_props))
return NULL;
array->decoder = HOLD_BACK_COUNT(decoder);
array->layer_id = doc->layer_id;
return obj;
}
JSObject *
lm_GetImageArray(MochaDecoder *decoder, JSObject *document)
{
JSObject *obj;
JSDocument *doc;
doc = JS_GetPrivate(decoder->js_context, document);
if (!doc)
return NULL;
obj = doc->images;
if (obj)
return obj;
obj = reflect_image_array(decoder, document);
doc->images = obj;
return obj;
}
JSObject *
LM_ReflectImage(MWContext *context, LO_ImageStruct *image_data,
PA_Tag * tag, int32 layer_id, uint index)
{
JSObject *obj, *array_obj, *outer_obj, *document;
MochaDecoder *decoder;
JSContext *cx;
JSImage *image;
PA_Block name = NULL;
lo_TopState *top_state;
PRHashTable *map;
image_data = LO_GetImageByIndex(context, layer_id, index);
XP_ASSERT(image_data);
if (! image_data)
return NULL;
obj = image_data->mocha_object;
if (obj)
return obj;
decoder = LM_GetMochaDecoder(context);
if (!decoder)
return NULL;
cx = decoder->js_context;
top_state = lo_GetMochaTopState(context);
if (top_state->resize_reload) {
map = lm_GetIdToObjectMap(decoder);
if (map)
obj = (JSObject *)PR_HashTableLookup(map,
LM_GET_MAPPING_KEY(LM_IMAGES, layer_id, index));
if (obj) {
image_data->mocha_object = obj;
goto done;
}
}
/* Get the document object that will hold this link */
document = lm_GetDocumentFromLayerId(decoder, layer_id);
if (!document)
goto done;
array_obj = lm_GetImageArray(decoder, document);
if (!array_obj)
goto done;
image = JS_malloc(cx, sizeof *image);
if (!image)
goto done;
XP_BZERO(image, sizeof *image);
/* if we got a tag passed in try to get the name out of there */
name = lo_FetchParamValue(context, tag, PARAM_NAME);
outer_obj = lm_GetOuterObject(decoder);
obj = JS_NewObject(cx, &lm_image_class, decoder->image_prototype,
outer_obj);
if (!obj || !JS_SetPrivate(cx, obj, image)) {
JS_free(cx, image);
goto done;
}
if (name) {
JSObject *doc_obj;
extern JSClass lm_form_class;
if (!JS_DefineProperty(cx, outer_obj, (const char *) name,
OBJECT_TO_JSVAL(obj), NULL, NULL,
JSPROP_ENUMERATE|JSPROP_READONLY)) {
obj = NULL;
goto done;
}
/* XXX backward compatibility with 3.0 bug: lo_BlockedImageLayout
would eagerly reflect images outside of any active form, so
they'd end up in document scope. */
if (JS_GetClass(cx, outer_obj) == &lm_form_class &&
(doc_obj = JS_GetParent(cx, outer_obj)) != NULL &&
!JS_DefineProperty(cx, doc_obj, (const char *) name,
OBJECT_TO_JSVAL(obj), NULL, NULL,
JSPROP_ENUMERATE|JSPROP_READONLY)) {
obj = NULL;
goto done;
}
}
image->decoder = HOLD_BACK_COUNT(decoder);
image->index = index;
image->layer_id = layer_id;
image->name = JS_NewStringCopyZ(cx, (const char *) name);
if (!JS_LockGCThing(cx, image->name)) {
obj = NULL;
goto done;
}
image_data->mocha_object = obj;
if (!lm_AddObjectToArray(cx, array_obj, (const char *) name,
index, obj)) {
obj = NULL;
goto done;
}
/* Put it in the index to object hash table */
map = lm_GetIdToObjectMap(decoder);
if (map)
PR_HashTableAdd(map,
LM_GET_MAPPING_KEY(LM_IMAGES, layer_id, index),
obj);
/* OK, we've got our image, see if there are any event handlers
* defined with it
*/
if(tag) {
PA_Block onload = lo_FetchParamValue(context, tag, PARAM_ONLOAD);
PA_Block onabort = lo_FetchParamValue(context, tag, PARAM_ONABORT);
PA_Block onerror = lo_FetchParamValue(context, tag, PARAM_ONERROR);
PA_Block onmousedown = lo_FetchParamValue(context, tag, PARAM_ONMOUSEDOWN);
PA_Block onmouseup = lo_FetchParamValue(context, tag, PARAM_ONMOUSEUP);
PA_Block id = lo_FetchParamValue(context, tag, PARAM_ID);
/* don't hold the layout lock across compiles */
LO_UnlockLayout();
if (onload != NULL) {
(void) lm_CompileEventHandler(decoder, id, tag->data,
tag->newline_count, obj,
PARAM_ONLOAD, onload);
PA_FREE(onload);
}
if (onabort != NULL) {
(void) lm_CompileEventHandler(decoder, id, tag->data,
tag->newline_count, obj,
PARAM_ONABORT, onabort);
PA_FREE(onabort);
}
if (onerror != NULL) {
(void) lm_CompileEventHandler(decoder, id, tag->data,
tag->newline_count, obj,
PARAM_ONERROR, onerror);
PA_FREE(onerror);
}
if (onmousedown != NULL) {
(void) lm_CompileEventHandler(decoder, id, tag->data,
tag->newline_count, obj,
PARAM_ONMOUSEDOWN, onmousedown);
PA_FREE(onmousedown);
}
if (onmouseup != NULL) {
(void) lm_CompileEventHandler(decoder, id, tag->data,
tag->newline_count, obj,
PARAM_ONMOUSEUP, onmouseup);
PA_FREE(onmouseup);
}
if (id)
PA_FREE(id);
LO_LockLayout();
}
done:
if(name)
PA_FREE(name);
LM_PutMochaDecoder(decoder);
return obj;
}
void
lm_ProcessImageEvent(MWContext *context, JSObject *obj,
LM_ImageEvent event)
{
uint event_mask;
jsval result;
JSImage *image;
image = JS_GetPrivate(context->mocha_context, obj);
if (!image)
return;
image->pending_events |= PR_BIT(event);
/* Special event used to trigger deferred events */
if (! (image->pending_events & PR_BIT(LM_IMGUNBLOCK)))
return;
for (event = LM_IMGLOAD; event <= LM_LASTEVENT; event++) {
event_mask = PR_BIT(event);
if (image->pending_events & event_mask) {
JSEvent *pEvent;
pEvent=XP_NEW_ZAP(JSEvent);
image->pending_events &= ~event_mask;
switch (event) {
case LM_IMGLOAD:
pEvent->type = EVENT_LOAD;
image->complete = JS_TRUE;
break;
case LM_IMGABORT:
pEvent->type = EVENT_ABORT;
image->complete = JS_TRUE;
break;
case LM_IMGERROR:
pEvent->type = EVENT_ERROR;
image->complete = JS_TRUE;
break;
default:
XP_ABORT(("Unknown image event"));
}
lm_SendEvent(context, obj, pEvent, &result);
}
}
}
JSBool
lm_InitImageClass(MochaDecoder *decoder)
{
JSContext *cx;
JSObject *prototype;
cx = decoder->js_context;
prototype = JS_InitClass(cx, decoder->window_object,
decoder->event_receiver_prototype, &lm_image_class,
Image, 0, image_props, NULL, NULL, NULL);
if (!prototype)
return JS_FALSE;
decoder->image_prototype = prototype;
return JS_TRUE;
}
/* Create an image context for anonymous images and attach it to the specified
mocha decoder. */
JSBool
lm_NewImageContext(MWContext *context, MochaDecoder *decoder)
{
IL_GroupContext *img_cx;
IMGCB* img_cb;
JMCException *exc = NULL;
if (!decoder->image_context) {
img_cb = IMGCBFactory_Create(&exc); /* JMC Module */
if (exc) {
JMC_DELETE_EXCEPTION(&exc); /* XXX Should really return
exception */
JS_ReportOutOfMemory(decoder->js_context);
return JS_FALSE;
}
/* Create an Image Group Context. IL_NewGroupContext augments the
reference count for the JMC callback interface. The opaque argument
to IL_NewGroupContext is the Front End's display context, which will
be passed back to all the Image Library's FE callbacks. */
img_cx = IL_NewGroupContext((void*)context, (IMGCBIF *)img_cb);
if (!img_cx) {
JS_ReportOutOfMemory(decoder->js_context);
return JS_FALSE;
}
/* Attach the IL_GroupContext to the mocha decoder. */
decoder->image_context = img_cx;
/* Allow the context to observe the decoder's image context. */
ET_il_SetGroupObserver(context, decoder->image_context, context, JS_TRUE);
}
return JS_TRUE;
}
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