wine/dlls/mshtml/mutation.c

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2008-12-30 05:48:59 +00:00
/*
* Copyright 2008 Jacek Caban for CodeWeavers
*
* 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 2.1 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdarg.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "winreg.h"
#include "ole2.h"
#include "shlguid.h"
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#include "mshtml_private.h"
#include "htmlevent.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(mshtml);
#define IE_MAJOR_VERSION 7
#define IE_MINOR_VERSION 0
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static const IID NS_ICONTENTUTILS_CID =
{0x762C4AE7,0xB923,0x422F,{0xB9,0x7E,0xB9,0xBF,0xC1,0xEF,0x7B,0xF0}};
static nsIContentUtils *content_utils;
static PRUnichar *handle_insert_comment(HTMLDocumentNode *doc, const PRUnichar *comment)
{
int majorv = 0, minorv = 0;
const PRUnichar *ptr, *end;
PRUnichar *buf;
DWORD len;
enum {
CMP_EQ,
CMP_LT,
CMP_LTE,
CMP_GT,
CMP_GTE
} cmpt = CMP_EQ;
static const PRUnichar endifW[] = {'<','!','[','e','n','d','i','f',']'};
if(comment[0] != '[' || comment[1] != 'i' || comment[2] != 'f')
return NULL;
ptr = comment+3;
while(isspaceW(*ptr))
ptr++;
if(ptr[0] == 'l' && ptr[1] == 't') {
ptr += 2;
if(*ptr == 'e') {
cmpt = CMP_LTE;
ptr++;
}else {
cmpt = CMP_LT;
}
}else if(ptr[0] == 'g' && ptr[1] == 't') {
ptr += 2;
if(*ptr == 'e') {
cmpt = CMP_GTE;
ptr++;
}else {
cmpt = CMP_GT;
}
}
if(!isspaceW(*ptr++))
return NULL;
while(isspaceW(*ptr))
ptr++;
if(ptr[0] != 'I' || ptr[1] != 'E')
return NULL;
ptr +=2;
if(!isspaceW(*ptr++))
return NULL;
while(isspaceW(*ptr))
ptr++;
if(!isdigitW(*ptr))
return NULL;
while(isdigitW(*ptr))
majorv = majorv*10 + (*ptr++ - '0');
if(*ptr == '.') {
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ptr++;
if(!isdigitW(*ptr))
return NULL;
while(isdigitW(*ptr))
minorv = minorv*10 + (*ptr++ - '0');
}
while(isspaceW(*ptr))
ptr++;
if(ptr[0] != ']' || ptr[1] != '>')
return NULL;
ptr += 2;
len = strlenW(ptr);
if(len < sizeof(endifW)/sizeof(WCHAR))
return NULL;
end = ptr + len-sizeof(endifW)/sizeof(WCHAR);
if(memcmp(end, endifW, sizeof(endifW)))
return NULL;
switch(cmpt) {
case CMP_EQ:
if(majorv == IE_MAJOR_VERSION && minorv == IE_MINOR_VERSION)
break;
return NULL;
case CMP_LT:
if(majorv > IE_MAJOR_VERSION)
break;
if(majorv == IE_MAJOR_VERSION && minorv > IE_MINOR_VERSION)
break;
return NULL;
case CMP_LTE:
if(majorv > IE_MAJOR_VERSION)
break;
if(majorv == IE_MAJOR_VERSION && minorv >= IE_MINOR_VERSION)
break;
return NULL;
case CMP_GT:
if(majorv < IE_MAJOR_VERSION)
break;
if(majorv == IE_MAJOR_VERSION && minorv < IE_MINOR_VERSION)
break;
return NULL;
case CMP_GTE:
if(majorv < IE_MAJOR_VERSION)
break;
if(majorv == IE_MAJOR_VERSION && minorv <= IE_MINOR_VERSION)
break;
return NULL;
}
buf = heap_alloc((end-ptr+1)*sizeof(WCHAR));
if(!buf)
return NULL;
memcpy(buf, ptr, (end-ptr)*sizeof(WCHAR));
buf[end-ptr] = 0;
return buf;
}
static nsresult run_insert_comment(HTMLDocumentNode *doc, nsISupports *comment_iface, nsISupports *arg2)
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{
const PRUnichar *comment;
nsIDOMComment *nscomment;
PRUnichar *replace_html;
nsAString comment_str;
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nsresult nsres;
nsres = nsISupports_QueryInterface(comment_iface, &IID_nsIDOMComment, (void**)&nscomment);
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if(NS_FAILED(nsres)) {
ERR("Could not get nsIDOMComment iface:%08x\n", nsres);
return nsres;
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}
nsAString_Init(&comment_str, NULL);
nsres = nsIDOMComment_GetData(nscomment, &comment_str);
if(NS_FAILED(nsres))
return nsres;
nsAString_GetData(&comment_str, &comment);
replace_html = handle_insert_comment(doc, comment);
nsAString_Finish(&comment_str);
if(replace_html) {
HRESULT hres;
hres = replace_node_by_html(doc->nsdoc, (nsIDOMNode*)nscomment, replace_html);
heap_free(replace_html);
if(FAILED(hres))
nsres = NS_ERROR_FAILURE;
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}
nsIDOMComment_Release(nscomment);
return nsres;
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}
static nsresult run_bind_to_tree(HTMLDocumentNode *doc, nsISupports *nsiface, nsISupports *arg2)
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{
nsIDOMNode *nsnode;
HTMLDOMNode *node;
nsresult nsres;
HRESULT hres;
TRACE("(%p)->(%p)\n", doc, nsiface);
nsres = nsISupports_QueryInterface(nsiface, &IID_nsIDOMNode, (void**)&nsnode);
if(NS_FAILED(nsres))
return nsres;
hres = get_node(doc, nsnode, TRUE, &node);
nsIDOMNode_Release(nsnode);
if(FAILED(hres)) {
ERR("Could not get node\n");
return nsres;
}
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if(node->vtbl->bind_to_tree)
node->vtbl->bind_to_tree(node);
return nsres;
}
/* Calls undocumented 69 cmd of CGID_Explorer */
static void call_explorer_69(HTMLDocumentObj *doc)
{
IOleCommandTarget *olecmd;
VARIANT var;
HRESULT hres;
if(!doc->client)
return;
hres = IOleClientSite_QueryInterface(doc->client, &IID_IOleCommandTarget, (void**)&olecmd);
if(FAILED(hres))
return;
VariantInit(&var);
hres = IOleCommandTarget_Exec(olecmd, &CGID_Explorer, 69, 0, NULL, &var);
IOleCommandTarget_Release(olecmd);
if(SUCCEEDED(hres) && V_VT(&var) != VT_NULL)
FIXME("handle result\n");
}
static void parse_complete(HTMLDocumentObj *doc)
{
TRACE("(%p)\n", doc);
if(doc->usermode == EDITMODE)
init_editor(&doc->basedoc);
call_explorer_69(doc);
if(doc->view_sink)
IAdviseSink_OnViewChange(doc->view_sink, DVASPECT_CONTENT, -1);
call_property_onchanged(&doc->basedoc.cp_propnotif, 1005);
call_explorer_69(doc);
if(doc->is_webbrowser && doc->usermode != EDITMODE)
IDocObjectService_FireNavigateComplete2(doc->doc_object_service, &doc->basedoc.window->IHTMLWindow2_iface, 0);
/* FIXME: IE7 calls EnableModelless(TRUE), EnableModelless(FALSE) and sets interactive state here */
}
static nsresult run_end_load(HTMLDocumentNode *This, nsISupports *arg1, nsISupports *arg2)
{
TRACE("(%p)\n", This);
if(!This->basedoc.doc_obj)
return NS_OK;
if(This == This->basedoc.doc_obj->basedoc.doc_node) {
/*
* This should be done in the worker thread that parses HTML,
* but we don't have such thread (Gecko parses HTML for us).
*/
parse_complete(This->basedoc.doc_obj);
}
set_ready_state(This->basedoc.window, READYSTATE_INTERACTIVE);
return NS_OK;
}
static nsresult run_insert_script(HTMLDocumentNode *doc, nsISupports *script_iface, nsISupports *parser_iface)
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{
nsIDOMHTMLScriptElement *nsscript;
nsIParser *nsparser = NULL;
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nsresult nsres;
TRACE("(%p)->(%p)\n", doc, script_iface);
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nsres = nsISupports_QueryInterface(script_iface, &IID_nsIDOMHTMLScriptElement, (void**)&nsscript);
if(NS_FAILED(nsres)) {
ERR("Could not get nsIDOMHTMLScriptElement: %08x\n", nsres);
return nsres;
}
if(parser_iface) {
nsres = nsISupports_QueryInterface(parser_iface, &IID_nsIParser, (void**)&nsparser);
if(NS_FAILED(nsres)) {
ERR("Could not get nsIParser iface: %08x\n", nsres);
nsparser = NULL;
}
}
if(nsparser)
nsIParser_BeginEvaluatingParserInsertedScript(nsparser);
doc_insert_script(doc->basedoc.window, nsscript);
if(nsparser) {
nsIParser_EndEvaluatingParserInsertedScript(nsparser);
nsIParser_Release(nsparser);
}
nsIDOMHTMLScriptElement_Release(nsscript);
return NS_OK;
}
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typedef struct nsRunnable nsRunnable;
typedef nsresult (*runnable_proc_t)(HTMLDocumentNode*,nsISupports*,nsISupports*);
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struct nsRunnable {
nsIRunnable nsIRunnable_iface;
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LONG ref;
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runnable_proc_t proc;
HTMLDocumentNode *doc;
nsISupports *arg1;
nsISupports *arg2;
};
static inline nsRunnable *impl_from_nsIRunnable(nsIRunnable *iface)
{
return CONTAINING_RECORD(iface, nsRunnable, nsIRunnable_iface);
}
static nsresult NSAPI nsRunnable_QueryInterface(nsIRunnable *iface,
nsIIDRef riid, void **result)
{
nsRunnable *This = impl_from_nsIRunnable(iface);
if(IsEqualGUID(riid, &IID_nsISupports)) {
TRACE("(%p)->(IID_nsISupports %p)\n", This, result);
*result = &This->nsIRunnable_iface;
}else if(IsEqualGUID(riid, &IID_nsIRunnable)) {
TRACE("(%p)->(IID_nsIRunnable %p)\n", This, result);
*result = &This->nsIRunnable_iface;
}else {
*result = NULL;
WARN("(%p)->(%s %p)\n", This, debugstr_guid(riid), result);
return NS_NOINTERFACE;
}
nsISupports_AddRef((nsISupports*)*result);
return NS_OK;
}
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static nsrefcnt NSAPI nsRunnable_AddRef(nsIRunnable *iface)
{
nsRunnable *This = impl_from_nsIRunnable(iface);
LONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) ref=%d\n", This, ref);
return ref;
}
static nsrefcnt NSAPI nsRunnable_Release(nsIRunnable *iface)
{
nsRunnable *This = impl_from_nsIRunnable(iface);
LONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) ref=%d\n", This, ref);
if(!ref) {
htmldoc_release(&This->doc->basedoc);
if(This->arg1)
nsISupports_Release(This->arg1);
if(This->arg2)
nsISupports_Release(This->arg2);
heap_free(This);
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}
return ref;
}
static nsresult NSAPI nsRunnable_Run(nsIRunnable *iface)
{
nsRunnable *This = impl_from_nsIRunnable(iface);
return This->proc(This->doc, This->arg1, This->arg2);
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}
static const nsIRunnableVtbl nsRunnableVtbl = {
nsRunnable_QueryInterface,
nsRunnable_AddRef,
nsRunnable_Release,
nsRunnable_Run
};
static void add_script_runner(HTMLDocumentNode *This, runnable_proc_t proc, nsISupports *arg1, nsISupports *arg2)
{
nsRunnable *runnable;
runnable = heap_alloc_zero(sizeof(*runnable));
if(!runnable)
return;
runnable->nsIRunnable_iface.lpVtbl = &nsRunnableVtbl;
runnable->ref = 1;
htmldoc_addref(&This->basedoc);
runnable->doc = This;
runnable->proc = proc;
if(arg1)
nsISupports_AddRef(arg1);
runnable->arg1 = arg1;
if(arg2)
nsISupports_AddRef(arg2);
runnable->arg2 = arg2;
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nsIContentUtils_AddScriptRunner(content_utils, &runnable->nsIRunnable_iface);
nsIRunnable_Release(&runnable->nsIRunnable_iface);
}
static inline HTMLDocumentNode *impl_from_nsIDocumentObserver(nsIDocumentObserver *iface)
{
return CONTAINING_RECORD(iface, HTMLDocumentNode, nsIDocumentObserver_iface);
}
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static nsresult NSAPI nsDocumentObserver_QueryInterface(nsIDocumentObserver *iface,
nsIIDRef riid, void **result)
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{
HTMLDocumentNode *This = impl_from_nsIDocumentObserver(iface);
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if(IsEqualGUID(&IID_nsISupports, riid)) {
TRACE("(%p)->(IID_nsISupports, %p)\n", This, result);
*result = &This->nsIDocumentObserver_iface;
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}else if(IsEqualGUID(&IID_nsIMutationObserver, riid)) {
TRACE("(%p)->(IID_nsIMutationObserver %p)\n", This, result);
*result = &This->nsIDocumentObserver_iface;
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}else if(IsEqualGUID(&IID_nsIDocumentObserver, riid)) {
TRACE("(%p)->(IID_nsIDocumentObserver %p)\n", This, result);
*result = &This->nsIDocumentObserver_iface;
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}else {
*result = NULL;
TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), result);
return NS_NOINTERFACE;
}
htmldoc_addref(&This->basedoc);
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return NS_OK;
}
static nsrefcnt NSAPI nsDocumentObserver_AddRef(nsIDocumentObserver *iface)
{
HTMLDocumentNode *This = impl_from_nsIDocumentObserver(iface);
return htmldoc_addref(&This->basedoc);
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}
static nsrefcnt NSAPI nsDocumentObserver_Release(nsIDocumentObserver *iface)
{
HTMLDocumentNode *This = impl_from_nsIDocumentObserver(iface);
return htmldoc_release(&This->basedoc);
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}
static void NSAPI nsDocumentObserver_CharacterDataWillChange(nsIDocumentObserver *iface,
nsIDocument *aDocument, nsIContent *aContent, void /*CharacterDataChangeInfo*/ *aInfo)
{
}
static void NSAPI nsDocumentObserver_CharacterDataChanged(nsIDocumentObserver *iface,
nsIDocument *aDocument, nsIContent *aContent, void /*CharacterDataChangeInfo*/ *aInfo)
{
}
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static void NSAPI nsDocumentObserver_AttributeWillChange(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsIContent *aContent, PRInt32 aNameSpaceID, nsIAtom *aAttribute, PRInt32 aModType)
{
}
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static void NSAPI nsDocumentObserver_AttributeChanged(nsIDocumentObserver *iface, nsIDocument *aDocument,
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nsIContent *aContent, PRInt32 aNameSpaceID, nsIAtom *aAttribute, PRInt32 aModType)
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{
}
static void NSAPI nsDocumentObserver_ContentAppended(nsIDocumentObserver *iface, nsIDocument *aDocument,
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nsIContent *aContainer, nsIContent *aFirstNewContent, PRInt32 aNewIndexInContainer)
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{
}
static void NSAPI nsDocumentObserver_ContentInserted(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsIContent *aContainer, nsIContent *aChild, PRInt32 aIndexInContainer)
{
}
static void NSAPI nsDocumentObserver_ContentRemoved(nsIDocumentObserver *iface, nsIDocument *aDocument,
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nsIContent *aContainer, nsIContent *aChild, PRInt32 aIndexInContainer,
nsIContent *aProviousSibling)
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{
}
static void NSAPI nsDocumentObserver_NodeWillBeDestroyed(nsIDocumentObserver *iface, const nsINode *aNode)
{
}
static void NSAPI nsDocumentObserver_ParentChainChanged(nsIDocumentObserver *iface, nsIContent *aContent)
{
}
static void NSAPI nsDocumentObserver_BeginUpdate(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsUpdateType aUpdateType)
{
}
static void NSAPI nsDocumentObserver_EndUpdate(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsUpdateType aUpdateType)
{
}
static void NSAPI nsDocumentObserver_BeginLoad(nsIDocumentObserver *iface, nsIDocument *aDocument)
{
}
static void NSAPI nsDocumentObserver_EndLoad(nsIDocumentObserver *iface, nsIDocument *aDocument)
{
HTMLDocumentNode *This = impl_from_nsIDocumentObserver(iface);
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TRACE("(%p)\n", This);
if(This->skip_mutation_notif)
return;
This->content_ready = TRUE;
add_script_runner(This, run_end_load, NULL, NULL);
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}
static void NSAPI nsDocumentObserver_ContentStatesChanged(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsIContent *aContent, nsEventStates *aStateMask)
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{
}
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static void NSAPI nsDocumentObserver_DocumentStatesChanged(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsEventStates *aStateMask)
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{
}
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static void NSAPI nsDocumentObserver_StyleSheetAdded(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsIStyleSheet *aStyleSheet, cpp_bool aDocumentSheet)
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{
}
static void NSAPI nsDocumentObserver_StyleSheetRemoved(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsIStyleSheet *aStyleSheet, cpp_bool aDocumentSheet)
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{
}
static void NSAPI nsDocumentObserver_StyleSheetApplicableStateChanged(nsIDocumentObserver *iface,
nsIDocument *aDocument, nsIStyleSheet *aStyleSheet, cpp_bool aApplicable)
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{
}
static void NSAPI nsDocumentObserver_StyleRuleChanged(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsIStyleSheet *aStyleSheet, nsIStyleRule *aOldStyleRule, nsIStyleSheet *aNewStyleRule)
{
}
static void NSAPI nsDocumentObserver_StyleRuleAdded(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsIStyleSheet *aStyleSheet, nsIStyleRule *aStyleRule)
{
}
static void NSAPI nsDocumentObserver_StyleRuleRemoved(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsIStyleSheet *aStyleSheet, nsIStyleRule *aStyleRule)
{
}
static void NSAPI nsDocumentObserver_BindToDocument(nsIDocumentObserver *iface, nsIDocument *aDocument,
nsIContent *aContent)
{
HTMLDocumentNode *This = impl_from_nsIDocumentObserver(iface);
nsIDOMHTMLIFrameElement *nsiframe;
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nsIDOMHTMLFrameElement *nsframe;
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nsIDOMComment *nscomment;
nsIDOMElement *nselem;
nsresult nsres;
TRACE("(%p)\n", This);
nsres = nsISupports_QueryInterface(aContent, &IID_nsIDOMElement, (void**)&nselem);
if(NS_SUCCEEDED(nsres)) {
check_event_attr(This, nselem);
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nsIDOMElement_Release(nselem);
}
nsres = nsISupports_QueryInterface(aContent, &IID_nsIDOMComment, (void**)&nscomment);
if(NS_SUCCEEDED(nsres)) {
TRACE("comment node\n");
add_script_runner(This, run_insert_comment, (nsISupports*)nscomment, NULL);
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nsIDOMComment_Release(nscomment);
}
nsres = nsISupports_QueryInterface(aContent, &IID_nsIDOMHTMLIFrameElement, (void**)&nsiframe);
if(NS_SUCCEEDED(nsres)) {
TRACE("iframe node\n");
add_script_runner(This, run_bind_to_tree, (nsISupports*)nsiframe, NULL);
nsIDOMHTMLIFrameElement_Release(nsiframe);
}
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nsres = nsISupports_QueryInterface(aContent, &IID_nsIDOMHTMLFrameElement, (void**)&nsframe);
if(NS_SUCCEEDED(nsres)) {
TRACE("frame node\n");
add_script_runner(This, run_bind_to_tree, (nsISupports*)nsframe, NULL);
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nsIDOMHTMLFrameElement_Release(nsframe);
}
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}
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static void NSAPI nsDocumentObserver_AttemptToExecuteScript(nsIDocumentObserver *iface, nsIContent *aContent,
nsIParser *aParser, cpp_bool *aBlock)
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{
HTMLDocumentNode *This = impl_from_nsIDocumentObserver(iface);
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nsIDOMHTMLScriptElement *nsscript;
nsresult nsres;
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TRACE("(%p)->(%p %p %p)\n", This, aContent, aParser, aBlock);
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nsres = nsISupports_QueryInterface(aContent, &IID_nsIDOMHTMLScriptElement, (void**)&nsscript);
if(NS_SUCCEEDED(nsres)) {
TRACE("script node\n");
add_script_runner(This, run_insert_script, (nsISupports*)nsscript, (nsISupports*)aParser);
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nsIDOMHTMLScriptElement_Release(nsscript);
}
}
static const nsIDocumentObserverVtbl nsDocumentObserverVtbl = {
nsDocumentObserver_QueryInterface,
nsDocumentObserver_AddRef,
nsDocumentObserver_Release,
nsDocumentObserver_CharacterDataWillChange,
nsDocumentObserver_CharacterDataChanged,
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nsDocumentObserver_AttributeWillChange,
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nsDocumentObserver_AttributeChanged,
nsDocumentObserver_ContentAppended,
nsDocumentObserver_ContentInserted,
nsDocumentObserver_ContentRemoved,
nsDocumentObserver_NodeWillBeDestroyed,
nsDocumentObserver_ParentChainChanged,
nsDocumentObserver_BeginUpdate,
nsDocumentObserver_EndUpdate,
nsDocumentObserver_BeginLoad,
nsDocumentObserver_EndLoad,
nsDocumentObserver_ContentStatesChanged,
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nsDocumentObserver_DocumentStatesChanged,
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nsDocumentObserver_StyleSheetAdded,
nsDocumentObserver_StyleSheetRemoved,
nsDocumentObserver_StyleSheetApplicableStateChanged,
nsDocumentObserver_StyleRuleChanged,
nsDocumentObserver_StyleRuleAdded,
nsDocumentObserver_StyleRuleRemoved,
nsDocumentObserver_BindToDocument,
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nsDocumentObserver_AttemptToExecuteScript
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};
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void init_document_mutation(HTMLDocumentNode *doc)
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{
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nsIDocument *nsdoc;
nsresult nsres;
doc->nsIDocumentObserver_iface.lpVtbl = &nsDocumentObserverVtbl;
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nsres = nsIDOMHTMLDocument_QueryInterface(doc->nsdoc, &IID_nsIDocument, (void**)&nsdoc);
if(NS_FAILED(nsres)) {
ERR("Could not get nsIDocument: %08x\n", nsres);
return;
}
nsIContentUtils_AddDocumentObserver(content_utils, nsdoc, &doc->nsIDocumentObserver_iface);
nsIDocument_Release(nsdoc);
}
void release_document_mutation(HTMLDocumentNode *doc)
{
nsIDocument *nsdoc;
nsresult nsres;
nsres = nsIDOMHTMLDocument_QueryInterface(doc->nsdoc, &IID_nsIDocument, (void**)&nsdoc);
if(NS_FAILED(nsres)) {
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ERR("Could not get nsIDocument: %08x\n", nsres);
return;
}
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nsIContentUtils_RemoveDocumentObserver(content_utils, nsdoc, &doc->nsIDocumentObserver_iface);
nsIDocument_Release(nsdoc);
}
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void init_mutation(nsIComponentManager *component_manager)
{
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nsIFactory *factory;
nsresult nsres;
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if(!component_manager) {
if(content_utils) {
nsIContentUtils_Release(content_utils);
content_utils = NULL;
}
return;
}
nsres = nsIComponentManager_GetClassObject(component_manager, &NS_ICONTENTUTILS_CID,
&IID_nsIFactory, (void**)&factory);
if(NS_FAILED(nsres)) {
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ERR("Could not create nsIContentUtils service: %08x\n", nsres);
return;
}
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nsres = nsIFactory_CreateInstance(factory, NULL, &IID_nsIContentUtils, (void**)&content_utils);
nsIFactory_Release(factory);
if(NS_FAILED(nsres))
ERR("Could not create nsIContentUtils instance: %08x\n", nsres);
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}