The Tor Browser: comparison parser/html/nsHtml5DocumentBuilder.h

--1:000000000000
+:65313dfb6817
+/* -*- 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/. */
+#ifndef nsHtml5DocumentBuilder_h
+#define nsHtml5DocumentBuilder_h
+#include "nsHtml5PendingNotification.h"
+#include "nsContentSink.h"
+#include "nsHtml5DocumentMode.h"
+#include "nsIDocument.h"
+typedef nsIContent* nsIContentPtr;
+enum eHtml5FlushState {
+eNotFlushing = 0,  // not flushing
+eInFlush = 1,      // the Flush() method is on the call stack
+eInDocUpdate = 2,  // inside an update batch on the document
+eNotifying = 3     // flushing pending append notifications
+};
+class nsHtml5DocumentBuilder : public nsContentSink
+{
+public:
+NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsHtml5DocumentBuilder,
+nsContentSink)
+NS_DECL_ISUPPORTS_INHERITED
+inline void HoldElement(nsIContent* aContent)
+{
+mOwnedElements.AppendElement(aContent);
+}
+inline bool HaveNotified(nsIContent* aNode)
+{
+NS_PRECONDITION(aNode, "HaveNotified called with null argument.");
+const nsHtml5PendingNotification* start = mPendingNotifications.Elements();
+const nsHtml5PendingNotification* end = start + mPendingNotifications.Length();
+for (;;) {
+nsIContent* parent = aNode->GetParent();
+if (!parent) {
+return true;
+}
+for (nsHtml5PendingNotification* iter = (nsHtml5PendingNotification*)start; iter < end; ++iter) {
+if (iter->Contains(parent)) {
+return iter->HaveNotifiedIndex(parent->IndexOf(aNode));
+}
+}
+aNode = parent;
+}
+}
+void PostPendingAppendNotification(nsIContent* aParent, nsIContent* aChild)
+{
+bool newParent = true;
+const nsIContentPtr* first = mElementsSeenInThisAppendBatch.Elements();
+const nsIContentPtr* last = first + mElementsSeenInThisAppendBatch.Length() - 1;
+for (const nsIContentPtr* iter = last; iter >= first; --iter) {
+#ifdef DEBUG_NS_HTML5_TREE_OP_EXECUTOR_FLUSH
+sAppendBatchSlotsExamined++;
+#endif
+if (*iter == aParent) {
+newParent = false;
+break;
+}
+}
+if (aChild->IsElement()) {
+mElementsSeenInThisAppendBatch.AppendElement(aChild);
+}
+mElementsSeenInThisAppendBatch.AppendElement(aParent);
+if (newParent) {
+mPendingNotifications.AppendElement(aParent);
+}
+#ifdef DEBUG_NS_HTML5_TREE_OP_EXECUTOR_FLUSH
+sAppendBatchExaminations++;
+#endif
+}
+void FlushPendingAppendNotifications()
+{
+NS_PRECONDITION(mFlushState == eInDocUpdate, "Notifications flushed outside update");
+mFlushState = eNotifying;
+const nsHtml5PendingNotification* start = mPendingNotifications.Elements();
+const nsHtml5PendingNotification* end = start + mPendingNotifications.Length();
+for (nsHtml5PendingNotification* iter = (nsHtml5PendingNotification*)start; iter < end; ++iter) {
+iter->Fire();
+}
+mPendingNotifications.Clear();
+#ifdef DEBUG_NS_HTML5_TREE_OP_EXECUTOR_FLUSH
+if (mElementsSeenInThisAppendBatch.Length() > sAppendBatchMaxSize) {
+sAppendBatchMaxSize = mElementsSeenInThisAppendBatch.Length();
+}
+#endif
+mElementsSeenInThisAppendBatch.Clear();
+NS_ASSERTION(mFlushState == eNotifying, "mFlushState out of sync");
+mFlushState = eInDocUpdate;
+}
+nsresult Init(nsIDocument* aDoc, nsIURI* aURI,
+nsISupports* aContainer, nsIChannel* aChannel);
+// Getters and setters for fields from nsContentSink
+nsIDocument* GetDocument()
+{
+return mDocument;
+}
+nsNodeInfoManager* GetNodeInfoManager()
+{
+return mNodeInfoManager;
+}
+/**
+* Marks this parser as broken and tells the stream parser (if any) to
+* terminate.
+*
+* @return aReason for convenience
+*/
+virtual nsresult MarkAsBroken(nsresult aReason);
+/**
+* Checks if this parser is broken. Returns a non-NS_OK (i.e. non-0)
+* value if broken.
+*/
+inline nsresult IsBroken()
+{
+return mBroken;
+}
+inline void BeginDocUpdate()
+{
+NS_PRECONDITION(mFlushState == eInFlush, "Tried to double-open update.");
+NS_PRECONDITION(mParser, "Started update without parser.");
+mFlushState = eInDocUpdate;
+mDocument->BeginUpdate(UPDATE_CONTENT_MODEL);
+}
+inline void EndDocUpdate()
+{
+NS_PRECONDITION(mFlushState != eNotifying, "mFlushState out of sync");
+if (mFlushState == eInDocUpdate) {
+FlushPendingAppendNotifications();
+mFlushState = eInFlush;
+mDocument->EndUpdate(UPDATE_CONTENT_MODEL);
+}
+}
+void SetDocumentCharsetAndSource(nsACString& aCharset, int32_t aCharsetSource);
+/**
+* Sets up style sheet load / parse
+*/
+void UpdateStyleSheet(nsIContent* aElement);
+void SetDocumentMode(nsHtml5DocumentMode m);
+void SetNodeInfoManager(nsNodeInfoManager* aManager)
+{
+mNodeInfoManager = aManager;
+}
+// nsContentSink methods
+virtual void UpdateChildCounts();
+virtual nsresult FlushTags();
+protected:
+inline void SetAppendBatchCapacity(uint32_t aCapacity)
+{
+mElementsSeenInThisAppendBatch.SetCapacity(aCapacity);
+}
+nsHtml5DocumentBuilder(bool aRunsToCompletion);
+virtual ~nsHtml5DocumentBuilder();
+private:
+nsTArray<nsHtml5PendingNotification> mPendingNotifications;
+nsTArray<nsIContentPtr>              mElementsSeenInThisAppendBatch;
+protected:
+nsTArray<nsCOMPtr<nsIContent> >      mOwnedElements;
+/**
+* Non-NS_OK if this parser should refuse to process any more input.
+* For example, the parser needs to be marked as broken if it drops some
+* input due to a memory allocation failure. In such a case, the whole
+* parser needs to be marked as broken, because some input has been lost
+* and parsing more input could lead to a DOM where pieces of HTML source
+* that weren't supposed to become scripts become scripts.
+*
+* Since NS_OK is actually 0, zeroing operator new takes care of
+* initializing this.
+*/
+nsresult                             mBroken;
+eHtml5FlushState                     mFlushState;
+};
+#endif // nsHtml5DocumentBuilder_h

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comparison: parser/html/nsHtml5DocumentBuilder.h

parser/html/nsHtml5DocumentBuilder.h