gecko/parser/html/nsHtml5TreeBuilderCppSupplement.h
Jan Varga 5020b003ce Bug 617528 Part 2 - Core implementation r=smaug
--HG--
rename : content/html/content/test/test_bug418756.html => content/html/content/test/test_checked.html
2011-08-08 19:31:32 +02:00

698 lines
26 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=78: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
* Henri Sivonen <hsivonen@iki.fi>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsContentErrors.h"
#include "nsIPresShell.h"
#include "nsEvent.h"
#include "nsGUIEvent.h"
#include "nsEventDispatcher.h"
#include "nsContentUtils.h"
#include "nsNodeUtils.h"
#define NS_HTML5_TREE_DEPTH_LIMIT 200
class nsPresContext;
nsHtml5TreeBuilder::nsHtml5TreeBuilder(nsAHtml5TreeOpSink* aOpSink,
nsHtml5TreeOpStage* aStage)
: scriptingEnabled(PR_FALSE)
, fragment(PR_FALSE)
, contextNode(nsnull)
, formPointer(nsnull)
, headPointer(nsnull)
, mOpSink(aOpSink)
, mHandles(new nsIContent*[NS_HTML5_TREE_BUILDER_HANDLE_ARRAY_LENGTH])
, mHandlesUsed(0)
, mSpeculativeLoadStage(aStage)
, mCurrentHtmlScriptIsAsyncOrDefer(PR_FALSE)
#ifdef DEBUG
, mActive(PR_FALSE)
#endif
{
MOZ_COUNT_CTOR(nsHtml5TreeBuilder);
}
nsHtml5TreeBuilder::~nsHtml5TreeBuilder()
{
MOZ_COUNT_DTOR(nsHtml5TreeBuilder);
NS_ASSERTION(!mActive, "nsHtml5TreeBuilder deleted without ever calling end() on it!");
mOpQueue.Clear();
}
nsIContent**
nsHtml5TreeBuilder::createElement(PRInt32 aNamespace, nsIAtom* aName, nsHtml5HtmlAttributes* aAttributes)
{
NS_PRECONDITION(aAttributes, "Got null attributes.");
NS_PRECONDITION(aName, "Got null name.");
NS_PRECONDITION(aNamespace == kNameSpaceID_XHTML ||
aNamespace == kNameSpaceID_SVG ||
aNamespace == kNameSpaceID_MathML,
"Bogus namespace.");
nsIContent** content = AllocateContentHandle();
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(aNamespace,
aName,
aAttributes,
content,
!!mSpeculativeLoadStage);
// mSpeculativeLoadStage is non-null only in the off-the-main-thread
// tree builder, which handles the network stream
// Start wall of code for speculative loading and line numbers
if (mSpeculativeLoadStage) {
switch (aNamespace) {
case kNameSpaceID_XHTML:
if (nsHtml5Atoms::img == aName) {
nsString* url = aAttributes->getValue(nsHtml5AttributeName::ATTR_SRC);
if (url) {
nsString* crossOrigin =
aAttributes->getValue(nsHtml5AttributeName::ATTR_CROSSORIGIN);
if (crossOrigin) {
mSpeculativeLoadQueue.AppendElement()->InitImage(*url, *crossOrigin);
} else {
mSpeculativeLoadQueue.AppendElement()->InitImage(*url, EmptyString());
}
}
} else if (nsHtml5Atoms::script == aName) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpSetScriptLineNumberAndFreeze, content, tokenizer->getLineNumber());
nsString* url = aAttributes->getValue(nsHtml5AttributeName::ATTR_SRC);
if (url) {
nsString* charset = aAttributes->getValue(nsHtml5AttributeName::ATTR_CHARSET);
nsString* type = aAttributes->getValue(nsHtml5AttributeName::ATTR_TYPE);
mSpeculativeLoadQueue.AppendElement()->InitScript(*url,
(charset) ? *charset : EmptyString(),
(type) ? *type : EmptyString());
mCurrentHtmlScriptIsAsyncOrDefer =
aAttributes->contains(nsHtml5AttributeName::ATTR_ASYNC) ||
aAttributes->contains(nsHtml5AttributeName::ATTR_DEFER);
}
} else if (nsHtml5Atoms::link == aName) {
nsString* rel = aAttributes->getValue(nsHtml5AttributeName::ATTR_REL);
// Not splitting on space here is bogus but the old parser didn't even
// do a case-insensitive check.
if (rel && rel->LowerCaseEqualsASCII("stylesheet")) {
nsString* url = aAttributes->getValue(nsHtml5AttributeName::ATTR_HREF);
if (url) {
nsString* charset = aAttributes->getValue(nsHtml5AttributeName::ATTR_CHARSET);
mSpeculativeLoadQueue.AppendElement()->InitStyle(*url,
(charset) ? *charset : EmptyString());
}
}
} else if (nsHtml5Atoms::video == aName) {
nsString* url = aAttributes->getValue(nsHtml5AttributeName::ATTR_POSTER);
if (url) {
mSpeculativeLoadQueue.AppendElement()->InitImage(*url, EmptyString());
}
} else if (nsHtml5Atoms::style == aName) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpSetStyleLineNumber, content, tokenizer->getLineNumber());
} else if (nsHtml5Atoms::html == aName) {
nsString* url = aAttributes->getValue(nsHtml5AttributeName::ATTR_MANIFEST);
if (url) {
mSpeculativeLoadQueue.AppendElement()->InitManifest(*url);
} else {
mSpeculativeLoadQueue.AppendElement()->InitManifest(EmptyString());
}
} else if (nsHtml5Atoms::base == aName) {
nsString* url =
aAttributes->getValue(nsHtml5AttributeName::ATTR_HREF);
if (url) {
mSpeculativeLoadQueue.AppendElement()->InitBase(*url);
}
}
break;
case kNameSpaceID_SVG:
if (nsHtml5Atoms::image == aName) {
nsString* url = aAttributes->getValue(nsHtml5AttributeName::ATTR_XLINK_HREF);
if (url) {
mSpeculativeLoadQueue.AppendElement()->InitImage(*url, EmptyString());
}
} else if (nsHtml5Atoms::script == aName) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpSetScriptLineNumberAndFreeze, content, tokenizer->getLineNumber());
nsString* url = aAttributes->getValue(nsHtml5AttributeName::ATTR_XLINK_HREF);
if (url) {
nsString* type = aAttributes->getValue(nsHtml5AttributeName::ATTR_TYPE);
mSpeculativeLoadQueue.AppendElement()->InitScript(*url,
EmptyString(),
(type) ? *type : EmptyString());
}
} else if (nsHtml5Atoms::style == aName) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpSetStyleLineNumber, content, tokenizer->getLineNumber());
nsString* url = aAttributes->getValue(nsHtml5AttributeName::ATTR_XLINK_HREF);
if (url) {
mSpeculativeLoadQueue.AppendElement()->InitStyle(*url, EmptyString());
}
}
break;
}
} else if (aNamespace != kNameSpaceID_MathML) {
// No speculative loader--just line numbers and defer/async check
if (nsHtml5Atoms::style == aName) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpSetStyleLineNumber, content, tokenizer->getLineNumber());
} else if (nsHtml5Atoms::script == aName) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpSetScriptLineNumberAndFreeze, content, tokenizer->getLineNumber());
if (aNamespace == kNameSpaceID_XHTML) {
mCurrentHtmlScriptIsAsyncOrDefer =
aAttributes->contains(nsHtml5AttributeName::ATTR_SRC) &&
(aAttributes->contains(nsHtml5AttributeName::ATTR_ASYNC) ||
aAttributes->contains(nsHtml5AttributeName::ATTR_DEFER));
}
} else if (aNamespace == kNameSpaceID_XHTML && nsHtml5Atoms::html == aName) {
nsString* url = aAttributes->getValue(nsHtml5AttributeName::ATTR_MANIFEST);
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
if (url) {
treeOp->Init(eTreeOpProcessOfflineManifest, *url);
} else {
treeOp->Init(eTreeOpProcessOfflineManifest, EmptyString());
}
}
}
// End wall of code for speculative loading
return content;
}
nsIContent**
nsHtml5TreeBuilder::createElement(PRInt32 aNamespace, nsIAtom* aName, nsHtml5HtmlAttributes* aAttributes, nsIContent** aFormElement)
{
nsIContent** content = createElement(aNamespace, aName, aAttributes);
if (aFormElement) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpSetFormElement, content, aFormElement);
}
return content;
}
nsIContent**
nsHtml5TreeBuilder::createHtmlElementSetAsRoot(nsHtml5HtmlAttributes* aAttributes)
{
nsIContent** content = createElement(kNameSpaceID_XHTML, nsHtml5Atoms::html, aAttributes);
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpAppendToDocument, content);
return content;
}
void
nsHtml5TreeBuilder::detachFromParent(nsIContent** aElement)
{
NS_PRECONDITION(aElement, "Null element");
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpDetach, aElement);
}
void
nsHtml5TreeBuilder::appendElement(nsIContent** aChild, nsIContent** aParent)
{
NS_PRECONDITION(aChild, "Null child");
NS_PRECONDITION(aParent, "Null parent");
if (deepTreeSurrogateParent) {
return;
}
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpAppend, aChild, aParent);
}
void
nsHtml5TreeBuilder::appendChildrenToNewParent(nsIContent** aOldParent, nsIContent** aNewParent)
{
NS_PRECONDITION(aOldParent, "Null old parent");
NS_PRECONDITION(aNewParent, "Null new parent");
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpAppendChildrenToNewParent, aOldParent, aNewParent);
}
void
nsHtml5TreeBuilder::insertFosterParentedCharacters(PRUnichar* aBuffer, PRInt32 aStart, PRInt32 aLength, nsIContent** aTable, nsIContent** aStackParent)
{
NS_PRECONDITION(aBuffer, "Null buffer");
NS_PRECONDITION(aTable, "Null table");
NS_PRECONDITION(aStackParent, "Null stack parent");
PRUnichar* bufferCopy = new PRUnichar[aLength];
memcpy(bufferCopy, aBuffer, aLength * sizeof(PRUnichar));
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpFosterParentText, bufferCopy, aLength, aStackParent, aTable);
}
void
nsHtml5TreeBuilder::insertFosterParentedChild(nsIContent** aChild, nsIContent** aTable, nsIContent** aStackParent)
{
NS_PRECONDITION(aChild, "Null child");
NS_PRECONDITION(aTable, "Null table");
NS_PRECONDITION(aStackParent, "Null stack parent");
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpFosterParent, aChild, aStackParent, aTable);
}
void
nsHtml5TreeBuilder::appendCharacters(nsIContent** aParent, PRUnichar* aBuffer, PRInt32 aStart, PRInt32 aLength)
{
NS_PRECONDITION(aBuffer, "Null buffer");
NS_PRECONDITION(aParent, "Null parent");
PRUnichar* bufferCopy = new PRUnichar[aLength];
memcpy(bufferCopy, aBuffer, aLength * sizeof(PRUnichar));
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpAppendText, bufferCopy, aLength,
deepTreeSurrogateParent ? deepTreeSurrogateParent : aParent);
}
void
nsHtml5TreeBuilder::appendIsindexPrompt(nsIContent** aParent)
{
NS_PRECONDITION(aParent, "Null parent");
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpAppendIsindexPrompt, aParent);
}
void
nsHtml5TreeBuilder::appendComment(nsIContent** aParent, PRUnichar* aBuffer, PRInt32 aStart, PRInt32 aLength)
{
NS_PRECONDITION(aBuffer, "Null buffer");
NS_PRECONDITION(aParent, "Null parent");
if (deepTreeSurrogateParent) {
return;
}
PRUnichar* bufferCopy = new PRUnichar[aLength];
memcpy(bufferCopy, aBuffer, aLength * sizeof(PRUnichar));
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpAppendComment, bufferCopy, aLength, aParent);
}
void
nsHtml5TreeBuilder::appendCommentToDocument(PRUnichar* aBuffer, PRInt32 aStart, PRInt32 aLength)
{
NS_PRECONDITION(aBuffer, "Null buffer");
PRUnichar* bufferCopy = new PRUnichar[aLength];
memcpy(bufferCopy, aBuffer, aLength * sizeof(PRUnichar));
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpAppendCommentToDocument, bufferCopy, aLength);
}
void
nsHtml5TreeBuilder::addAttributesToElement(nsIContent** aElement, nsHtml5HtmlAttributes* aAttributes)
{
NS_PRECONDITION(aElement, "Null element");
NS_PRECONDITION(aAttributes, "Null attributes");
if (aAttributes == nsHtml5HtmlAttributes::EMPTY_ATTRIBUTES) {
return;
}
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(aElement, aAttributes);
}
void
nsHtml5TreeBuilder::markMalformedIfScript(nsIContent** aElement)
{
NS_PRECONDITION(aElement, "Null element");
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpMarkMalformedIfScript, aElement);
}
void
nsHtml5TreeBuilder::start(PRBool fragment)
{
mCurrentHtmlScriptIsAsyncOrDefer = PR_FALSE;
deepTreeSurrogateParent = nsnull;
#ifdef DEBUG
mActive = PR_TRUE;
#endif
}
void
nsHtml5TreeBuilder::end()
{
mOpQueue.Clear();
#ifdef DEBUG
mActive = PR_FALSE;
#endif
}
void
nsHtml5TreeBuilder::appendDoctypeToDocument(nsIAtom* aName, nsString* aPublicId, nsString* aSystemId)
{
NS_PRECONDITION(aName, "Null name");
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(aName, *aPublicId, *aSystemId);
// nsXMLContentSink can flush here, but what's the point?
// It can also interrupt here, but we can't.
}
void
nsHtml5TreeBuilder::elementPushed(PRInt32 aNamespace, nsIAtom* aName, nsIContent** aElement)
{
NS_ASSERTION(aNamespace == kNameSpaceID_XHTML || aNamespace == kNameSpaceID_SVG || aNamespace == kNameSpaceID_MathML, "Element isn't HTML, SVG or MathML!");
NS_ASSERTION(aName, "Element doesn't have local name!");
NS_ASSERTION(aElement, "No element!");
/*
* The frame constructor uses recursive algorithms, so it can't deal with
* arbitrarily deep trees. This is especially a problem on Windows where
* the permitted depth of the runtime stack is rather small.
*
* The following is a protection against author incompetence--not against
* malice. There are other ways to make the DOM deep anyway.
*
* The basic idea is that when the tree builder stack gets too deep,
* append operations no longer append to the node that the HTML parsing
* algorithm says they should but instead text nodes are append to the last
* element that was seen before a magic tree builder stack threshold was
* reached and element and comment nodes aren't appended to the DOM at all.
*
* However, for security reasons, non-child descendant text nodes inside an
* SVG script or style element should not become children. Also, non-cell
* table elements shouldn't be used as surrogate parents for user experience
* reasons.
*/
if (!deepTreeSurrogateParent && currentPtr >= NS_HTML5_TREE_DEPTH_LIMIT &&
!(aName == nsHtml5Atoms::script ||
aName == nsHtml5Atoms::table ||
aName == nsHtml5Atoms::thead ||
aName == nsHtml5Atoms::tfoot ||
aName == nsHtml5Atoms::tbody ||
aName == nsHtml5Atoms::tr ||
aName == nsHtml5Atoms::colgroup ||
aName == nsHtml5Atoms::style)) {
deepTreeSurrogateParent = aElement;
}
if (aNamespace != kNameSpaceID_XHTML) {
return;
}
if (aName == nsHtml5Atoms::body || aName == nsHtml5Atoms::frameset) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpStartLayout);
return;
}
}
void
nsHtml5TreeBuilder::elementPopped(PRInt32 aNamespace, nsIAtom* aName, nsIContent** aElement)
{
NS_ASSERTION(aNamespace == kNameSpaceID_XHTML || aNamespace == kNameSpaceID_SVG || aNamespace == kNameSpaceID_MathML, "Element isn't HTML, SVG or MathML!");
NS_ASSERTION(aName, "Element doesn't have local name!");
NS_ASSERTION(aElement, "No element!");
if (deepTreeSurrogateParent && currentPtr <= NS_HTML5_TREE_DEPTH_LIMIT) {
deepTreeSurrogateParent = nsnull;
}
if (aNamespace == kNameSpaceID_MathML) {
return;
}
// we now have only SVG and HTML
if (aName == nsHtml5Atoms::script) {
if (mCurrentHtmlScriptIsAsyncOrDefer) {
NS_ASSERTION(aNamespace == kNameSpaceID_XHTML,
"Only HTML scripts may be async/defer.");
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpRunScriptAsyncDefer, aElement);
mCurrentHtmlScriptIsAsyncOrDefer = PR_FALSE;
return;
}
requestSuspension();
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->InitScript(aElement);
return;
}
if (aName == nsHtml5Atoms::title) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpDoneAddingChildren, aElement);
return;
}
if (aName == nsHtml5Atoms::style || (aNamespace == kNameSpaceID_XHTML && aName == nsHtml5Atoms::link)) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpUpdateStyleSheet, aElement);
return;
}
if (aNamespace == kNameSpaceID_SVG) {
if (aName == nsHtml5Atoms::svg) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpSvgLoad, aElement);
}
return;
}
// we now have only HTML
// Some HTML nodes need DoneAddingChildren() called to initialize
// properly (e.g. form state restoration).
// XXX expose ElementName group here and do switch
if (aName == nsHtml5Atoms::object ||
aName == nsHtml5Atoms::applet) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpDoneAddingChildren, aElement);
return;
}
if (aName == nsHtml5Atoms::select ||
aName == nsHtml5Atoms::textarea) {
if (!formPointer) {
// If form inputs don't belong to a form, their state preservation
// won't work right without an append notification flush at this
// point. See bug 497861 and bug 539895.
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpFlushPendingAppendNotifications);
}
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpDoneAddingChildren, aElement);
return;
}
if (aName == nsHtml5Atoms::input ||
aName == nsHtml5Atoms::button ||
aName == nsHtml5Atoms::menuitem) {
if (!formPointer) {
// If form inputs don't belong to a form, their state preservation
// won't work right without an append notification flush at this
// point. See bug 497861.
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpFlushPendingAppendNotifications);
}
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpDoneCreatingElement, aElement);
return;
}
if (aName == nsHtml5Atoms::meta && !fragment) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpProcessMeta, aElement);
return;
}
return;
}
void
nsHtml5TreeBuilder::accumulateCharacters(const PRUnichar* aBuf, PRInt32 aStart, PRInt32 aLength)
{
PRInt32 newFillLen = charBufferLen + aLength;
if (newFillLen > charBuffer.length) {
PRInt32 newAllocLength = newFillLen + (newFillLen >> 1);
jArray<PRUnichar,PRInt32> newBuf = jArray<PRUnichar,PRInt32>::newJArray(newAllocLength);
memcpy(newBuf, charBuffer, sizeof(PRUnichar) * charBufferLen);
charBuffer = newBuf;
}
memcpy(charBuffer + charBufferLen, aBuf + aStart, sizeof(PRUnichar) * aLength);
charBufferLen = newFillLen;
}
nsIContent**
nsHtml5TreeBuilder::AllocateContentHandle()
{
if (mHandlesUsed == NS_HTML5_TREE_BUILDER_HANDLE_ARRAY_LENGTH) {
mOldHandles.AppendElement(mHandles.forget());
mHandles = new nsIContent*[NS_HTML5_TREE_BUILDER_HANDLE_ARRAY_LENGTH];
mHandlesUsed = 0;
}
#ifdef DEBUG
mHandles[mHandlesUsed] = (nsIContent*)0xC0DEDBAD;
#endif
return &mHandles[mHandlesUsed++];
}
PRBool
nsHtml5TreeBuilder::HasScript()
{
PRUint32 len = mOpQueue.Length();
if (!len) {
return PR_FALSE;
}
return mOpQueue.ElementAt(len - 1).IsRunScript();
}
PRBool
nsHtml5TreeBuilder::Flush(PRBool aDiscretionary)
{
if (!aDiscretionary ||
!(charBufferLen &&
currentPtr >= 0 &&
stack[currentPtr]->isFosterParenting())) {
// Don't flush text on discretionary flushes if the current element on
// the stack is a foster-parenting element and there's pending text,
// because flushing in that case would make the tree shape dependent on
// where the flush points fall.
flushCharacters();
}
FlushLoads();
if (mOpSink) {
PRBool hasOps = !mOpQueue.IsEmpty();
if (hasOps) {
mOpSink->MoveOpsFrom(mOpQueue);
}
return hasOps;
}
// no op sink: throw away ops
mOpQueue.Clear();
return PR_FALSE;
}
void
nsHtml5TreeBuilder::FlushLoads()
{
if (!mSpeculativeLoadQueue.IsEmpty()) {
mSpeculativeLoadStage->MoveSpeculativeLoadsFrom(mSpeculativeLoadQueue);
}
}
void
nsHtml5TreeBuilder::SetDocumentCharset(nsACString& aCharset,
PRInt32 aCharsetSource)
{
mSpeculativeLoadQueue.AppendElement()->InitSetDocumentCharset(aCharset,
aCharsetSource);
}
void
nsHtml5TreeBuilder::StreamEnded()
{
// The fragment mode calls DidBuildModel from nsHtml5Parser.
// Letting DidBuildModel be called from the executor in the fragment case
// confuses the EndLoad logic of nsHTMLDocument, since nsHTMLDocument
// thinks it is dealing with document.written content as opposed to
// innerHTML content.
if (!fragment) {
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpStreamEnded);
}
}
void
nsHtml5TreeBuilder::NeedsCharsetSwitchTo(const nsACString& aCharset,
PRInt32 aCharsetSource)
{
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpNeedsCharsetSwitchTo, aCharset, aCharsetSource);
}
void
nsHtml5TreeBuilder::AddSnapshotToScript(nsAHtml5TreeBuilderState* aSnapshot, PRInt32 aLine)
{
NS_PRECONDITION(HasScript(), "No script to add a snapshot to!");
NS_PRECONDITION(aSnapshot, "Got null snapshot.");
mOpQueue.ElementAt(mOpQueue.Length() - 1).SetSnapshot(aSnapshot, aLine);
}
void
nsHtml5TreeBuilder::DropHandles()
{
mOldHandles.Clear();
mHandlesUsed = 0;
}
// DocumentModeHandler
void
nsHtml5TreeBuilder::documentMode(nsHtml5DocumentMode m)
{
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(m);
}