gecko-dev/parser/html/nsHtml5TreeBuilderCppSupple...

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=78: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsError.h"
#include "nsIPresShell.h"
#include "nsEvent.h"
#include "nsGUIEvent.h"
#include "nsEventDispatcher.h"
#include "nsNodeUtils.h"
#include "nsIFrame.h"
#include "mozilla/Likely.h"
class nsPresContext;
nsHtml5TreeBuilder::nsHtml5TreeBuilder(nsAHtml5TreeOpSink* aOpSink,
nsHtml5TreeOpStage* aStage)
: scriptingEnabled(false)
, fragment(false)
, contextNode(nullptr)
, formPointer(nullptr)
, headPointer(nullptr)
, mViewSource(nullptr)
, mOpSink(aOpSink)
, mHandles(new nsIContent*[NS_HTML5_TREE_BUILDER_HANDLE_ARRAY_LENGTH])
, mHandlesUsed(0)
, mSpeculativeLoadStage(aStage)
, mCurrentHtmlScriptIsAsyncOrDefer(false)
, mPreventScriptExecution(false)
#ifdef DEBUG
, mActive(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(int32_t 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);
mSpeculativeLoadQueue.AppendElement()->
InitImage(*url,
crossOrigin ? *crossOrigin : NullString());
}
} 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);
nsString* crossOrigin =
aAttributes->getValue(nsHtml5AttributeName::ATTR_CROSSORIGIN);
mSpeculativeLoadQueue.AppendElement()->
InitScript(*url,
(charset) ? *charset : EmptyString(),
(type) ? *type : EmptyString(),
(crossOrigin) ? *crossOrigin : NullString(),
mode == NS_HTML5TREE_BUILDER_IN_HEAD);
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);
nsString* crossOrigin =
aAttributes->getValue(nsHtml5AttributeName::ATTR_CROSSORIGIN);
mSpeculativeLoadQueue.AppendElement()->
InitStyle(*url,
(charset) ? *charset : EmptyString(),
(crossOrigin) ? *crossOrigin : NullString());
}
}
} else if (nsHtml5Atoms::video == aName) {
nsString* url = aAttributes->getValue(nsHtml5AttributeName::ATTR_POSTER);
if (url) {
mSpeculativeLoadQueue.AppendElement()->InitImage(*url, NullString());
}
} 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, NullString());
}
} 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);
nsString* crossOrigin =
aAttributes->getValue(nsHtml5AttributeName::ATTR_CROSSORIGIN);
mSpeculativeLoadQueue.AppendElement()->
InitScript(*url,
EmptyString(),
(type) ? *type : EmptyString(),
(crossOrigin) ? *crossOrigin : NullString(),
mode == NS_HTML5TREE_BUILDER_IN_HEAD);
}
} 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) {
nsString* crossOrigin =
aAttributes->getValue(nsHtml5AttributeName::ATTR_CROSSORIGIN);
mSpeculativeLoadQueue.AppendElement()->
InitStyle(*url, EmptyString(),
(crossOrigin) ? *crossOrigin : NullString());
}
}
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(int32_t 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, int32_t aStart, int32_t 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, int32_t aStart, int32_t 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, int32_t aStart, int32_t 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, int32_t aStart, int32_t 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(bool fragment)
{
mCurrentHtmlScriptIsAsyncOrDefer = false;
deepTreeSurrogateParent = nullptr;
#ifdef DEBUG
mActive = true;
#endif
}
void
nsHtml5TreeBuilder::end()
{
mOpQueue.Clear();
#ifdef DEBUG
mActive = 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(int32_t 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 >= MAX_REFLOW_DEPTH &&
!(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;
}
if (aName == nsHtml5Atoms::input ||
aName == nsHtml5Atoms::button) {
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.
mOpQueue.AppendElement()->Init(eTreeOpFlushPendingAppendNotifications);
}
mOpQueue.AppendElement()->Init(eTreeOpDoneCreatingElement, aElement);
return;
}
if (aName == nsHtml5Atoms::audio ||
aName == nsHtml5Atoms::video ||
aName == nsHtml5Atoms::menuitem) {
mOpQueue.AppendElement()->Init(eTreeOpDoneCreatingElement, aElement);
return;
}
}
void
nsHtml5TreeBuilder::elementPopped(int32_t 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 <= MAX_REFLOW_DEPTH) {
deepTreeSurrogateParent = nullptr;
}
if (aNamespace == kNameSpaceID_MathML) {
return;
}
// we now have only SVG and HTML
if (aName == nsHtml5Atoms::script) {
if (mPreventScriptExecution) {
mOpQueue.AppendElement()->Init(eTreeOpPreventScriptExecution, aElement);
return;
}
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 = 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::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, int32_t aStart, int32_t aLength)
{
int32_t newFillLen = charBufferLen + aLength;
if (newFillLen > charBuffer.length) {
int32_t newAllocLength = newFillLen + (newFillLen >> 1);
jArray<PRUnichar,int32_t> newBuf = jArray<PRUnichar,int32_t>::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++];
}
bool
nsHtml5TreeBuilder::HasScript()
{
uint32_t len = mOpQueue.Length();
if (!len) {
return false;
}
return mOpQueue.ElementAt(len - 1).IsRunScript();
}
bool
nsHtml5TreeBuilder::Flush(bool 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) {
bool hasOps = !mOpQueue.IsEmpty();
if (hasOps) {
mOpSink->MoveOpsFrom(mOpQueue);
}
return hasOps;
}
// no op sink: throw away ops
mOpQueue.Clear();
return false;
}
void
nsHtml5TreeBuilder::FlushLoads()
{
if (!mSpeculativeLoadQueue.IsEmpty()) {
mSpeculativeLoadStage->MoveSpeculativeLoadsFrom(mSpeculativeLoadQueue);
}
}
void
nsHtml5TreeBuilder::SetDocumentCharset(nsACString& aCharset,
int32_t aCharsetSource)
{
if (mSpeculativeLoadStage) {
mSpeculativeLoadQueue.AppendElement()->InitSetDocumentCharset(
aCharset, aCharsetSource);
} else {
mOpQueue.AppendElement()->Init(
eTreeOpSetDocumentCharset, 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,
int32_t aCharsetSource,
int32_t aLineNumber)
{
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(eTreeOpNeedsCharsetSwitchTo,
aCharset,
aCharsetSource,
aLineNumber);
}
void
nsHtml5TreeBuilder::MaybeComplainAboutCharset(const char* aMsgId,
bool aError,
int32_t aLineNumber)
{
mOpQueue.AppendElement()->Init(aMsgId, aError, aLineNumber);
}
void
nsHtml5TreeBuilder::AddSnapshotToScript(nsAHtml5TreeBuilderState* aSnapshot, int32_t 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;
}
void
nsHtml5TreeBuilder::MarkAsBroken()
{
mOpQueue.Clear(); // Previous ops don't matter anymore
mOpQueue.AppendElement()->Init(eTreeOpMarkAsBroken);
}
void
nsHtml5TreeBuilder::StartPlainTextViewSource(const nsAutoString& aTitle)
{
startTag(nsHtml5ElementName::ELT_TITLE,
nsHtml5HtmlAttributes::EMPTY_ATTRIBUTES,
false);
// XUL will add the "Source of: " prefix.
uint32_t length = aTitle.Length();
if (length > INT32_MAX) {
length = INT32_MAX;
}
characters(aTitle.get(), 0, (int32_t)length);
endTag(nsHtml5ElementName::ELT_TITLE);
startTag(nsHtml5ElementName::ELT_LINK,
nsHtml5ViewSourceUtils::NewLinkAttributes(),
false);
startTag(nsHtml5ElementName::ELT_BODY,
nsHtml5ViewSourceUtils::NewBodyAttributes(),
false);
StartPlainTextBody();
}
void
nsHtml5TreeBuilder::StartPlainText()
{
startTag(nsHtml5ElementName::ELT_LINK,
nsHtml5PlainTextUtils::NewLinkAttributes(),
false);
StartPlainTextBody();
}
void
nsHtml5TreeBuilder::StartPlainTextBody()
{
startTag(nsHtml5ElementName::ELT_PRE,
nsHtml5HtmlAttributes::EMPTY_ATTRIBUTES,
false);
needToDropLF = false;
}
// DocumentModeHandler
void
nsHtml5TreeBuilder::documentMode(nsHtml5DocumentMode m)
{
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
treeOp->Init(m);
}
nsIContent**
nsHtml5TreeBuilder::getDocumentFragmentForTemplate(nsIContent** aTemplate)
{
nsHtml5TreeOperation* treeOp = mOpQueue.AppendElement();
NS_ASSERTION(treeOp, "Tree op allocation failed.");
nsIContent** fragHandle = AllocateContentHandle();
treeOp->Init(eTreeOpGetDocumentFragmentForTemplate, aTemplate, fragHandle);
return fragHandle;
}
// Error reporting
void
nsHtml5TreeBuilder::EnableViewSource(nsHtml5Highlighter* aHighlighter)
{
mViewSource = aHighlighter;
}
void
nsHtml5TreeBuilder::errStrayStartTag(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errStrayStartTag2", aName);
}
}
void
nsHtml5TreeBuilder::errStrayEndTag(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errStrayEndTag", aName);
}
}
void
nsHtml5TreeBuilder::errUnclosedElements(int32_t aIndex, nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errUnclosedElements", aName);
}
}
void
nsHtml5TreeBuilder::errUnclosedElementsImplied(int32_t aIndex, nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errUnclosedElementsImplied",
aName);
}
}
void
nsHtml5TreeBuilder::errUnclosedElementsCell(int32_t aIndex)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errUnclosedElementsCell");
}
}
void
nsHtml5TreeBuilder::errStrayDoctype()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errStrayDoctype");
}
}
void
nsHtml5TreeBuilder::errAlmostStandardsDoctype()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errAlmostStandardsDoctype");
}
}
void
nsHtml5TreeBuilder::errQuirkyDoctype()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errQuirkyDoctype");
}
}
void
nsHtml5TreeBuilder::errNonSpaceInTrailer()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errNonSpaceInTrailer");
}
}
void
nsHtml5TreeBuilder::errNonSpaceAfterFrameset()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errNonSpaceAfterFrameset");
}
}
void
nsHtml5TreeBuilder::errNonSpaceInFrameset()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errNonSpaceInFrameset");
}
}
void
nsHtml5TreeBuilder::errNonSpaceAfterBody()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errNonSpaceAfterBody");
}
}
void
nsHtml5TreeBuilder::errNonSpaceInColgroupInFragment()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errNonSpaceInColgroupInFragment");
}
}
void
nsHtml5TreeBuilder::errNonSpaceInNoscriptInHead()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errNonSpaceInNoscriptInHead");
}
}
void
nsHtml5TreeBuilder::errFooBetweenHeadAndBody(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errFooBetweenHeadAndBody", aName);
}
}
void
nsHtml5TreeBuilder::errStartTagWithoutDoctype()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errStartTagWithoutDoctype");
}
}
void
nsHtml5TreeBuilder::errNoSelectInTableScope()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errNoSelectInTableScope");
}
}
void
nsHtml5TreeBuilder::errStartSelectWhereEndSelectExpected()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun(
"errStartSelectWhereEndSelectExpected");
}
}
void
nsHtml5TreeBuilder::errStartTagWithSelectOpen(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errStartTagWithSelectOpen", aName);
}
}
void
nsHtml5TreeBuilder::errBadStartTagInHead(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errBadStartTagInHead2", aName);
}
}
void
nsHtml5TreeBuilder::errImage()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errImage");
}
}
void
nsHtml5TreeBuilder::errIsindex()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errIsindex");
}
}
void
nsHtml5TreeBuilder::errFooSeenWhenFooOpen(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errFooSeenWhenFooOpen", aName);
}
}
void
nsHtml5TreeBuilder::errHeadingWhenHeadingOpen()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errHeadingWhenHeadingOpen");
}
}
void
nsHtml5TreeBuilder::errFramesetStart()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errFramesetStart");
}
}
void
nsHtml5TreeBuilder::errNoCellToClose()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errNoCellToClose");
}
}
void
nsHtml5TreeBuilder::errStartTagInTable(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errStartTagInTable", aName);
}
}
void
nsHtml5TreeBuilder::errFormWhenFormOpen()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errFormWhenFormOpen");
}
}
void
nsHtml5TreeBuilder::errTableSeenWhileTableOpen()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errTableSeenWhileTableOpen");
}
}
void
nsHtml5TreeBuilder::errStartTagInTableBody(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errStartTagInTableBody", aName);
}
}
void
nsHtml5TreeBuilder::errEndTagSeenWithoutDoctype()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errEndTagSeenWithoutDoctype");
}
}
void
nsHtml5TreeBuilder::errEndTagAfterBody()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errEndTagAfterBody");
}
}
void
nsHtml5TreeBuilder::errEndTagSeenWithSelectOpen(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errEndTagSeenWithSelectOpen",
aName);
}
}
void
nsHtml5TreeBuilder::errGarbageInColgroup()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errGarbageInColgroup");
}
}
void
nsHtml5TreeBuilder::errEndTagBr()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errEndTagBr");
}
}
void
nsHtml5TreeBuilder::errNoElementToCloseButEndTagSeen(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun(
"errNoElementToCloseButEndTagSeen", aName);
}
}
void
nsHtml5TreeBuilder::errHtmlStartTagInForeignContext(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errHtmlStartTagInForeignContext",
aName);
}
}
void
nsHtml5TreeBuilder::errTableClosedWhileCaptionOpen()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errTableClosedWhileCaptionOpen");
}
}
void
nsHtml5TreeBuilder::errNoTableRowToClose()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errNoTableRowToClose");
}
}
void
nsHtml5TreeBuilder::errNonSpaceInTable()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errNonSpaceInTable");
}
}
void
nsHtml5TreeBuilder::errUnclosedChildrenInRuby()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errUnclosedChildrenInRuby");
}
}
void
nsHtml5TreeBuilder::errStartTagSeenWithoutRuby(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errStartTagSeenWithoutRuby",
aName);
}
}
void
nsHtml5TreeBuilder::errSelfClosing()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentSlash("errSelfClosing");
}
}
void
nsHtml5TreeBuilder::errNoCheckUnclosedElementsOnStack()
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun(
"errNoCheckUnclosedElementsOnStack");
}
}
void
nsHtml5TreeBuilder::errEndTagDidNotMatchCurrentOpenElement(nsIAtom* aName,
nsIAtom* aOther)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun(
"errEndTagDidNotMatchCurrentOpenElement", aName, aOther);
}
}
void
nsHtml5TreeBuilder::errEndTagViolatesNestingRules(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errEndTagViolatesNestingRules", aName);
}
}
void
nsHtml5TreeBuilder::errEndWithUnclosedElements(nsIAtom* aName)
{
if (MOZ_UNLIKELY(mViewSource)) {
mViewSource->AddErrorToCurrentRun("errEndWithUnclosedElements", aName);
}
}