1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/parser/html/nsHtml5DocumentBuilder.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,198 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=2 sw=2 et tw=78: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef nsHtml5DocumentBuilder_h
1.11 +#define nsHtml5DocumentBuilder_h
1.12 +
1.13 +#include "nsHtml5PendingNotification.h"
1.14 +#include "nsContentSink.h"
1.15 +#include "nsHtml5DocumentMode.h"
1.16 +#include "nsIDocument.h"
1.17 +
1.18 +typedef nsIContent* nsIContentPtr;
1.19 +
1.20 +enum eHtml5FlushState {
1.21 + eNotFlushing = 0, // not flushing
1.22 + eInFlush = 1, // the Flush() method is on the call stack
1.23 + eInDocUpdate = 2, // inside an update batch on the document
1.24 + eNotifying = 3 // flushing pending append notifications
1.25 +};
1.26 +
1.27 +class nsHtml5DocumentBuilder : public nsContentSink
1.28 +{
1.29 +public:
1.30 + NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsHtml5DocumentBuilder,
1.31 + nsContentSink)
1.32 +
1.33 + NS_DECL_ISUPPORTS_INHERITED
1.34 +
1.35 + inline void HoldElement(nsIContent* aContent)
1.36 + {
1.37 + mOwnedElements.AppendElement(aContent);
1.38 + }
1.39 +
1.40 + inline bool HaveNotified(nsIContent* aNode)
1.41 + {
1.42 + NS_PRECONDITION(aNode, "HaveNotified called with null argument.");
1.43 + const nsHtml5PendingNotification* start = mPendingNotifications.Elements();
1.44 + const nsHtml5PendingNotification* end = start + mPendingNotifications.Length();
1.45 + for (;;) {
1.46 + nsIContent* parent = aNode->GetParent();
1.47 + if (!parent) {
1.48 + return true;
1.49 + }
1.50 + for (nsHtml5PendingNotification* iter = (nsHtml5PendingNotification*)start; iter < end; ++iter) {
1.51 + if (iter->Contains(parent)) {
1.52 + return iter->HaveNotifiedIndex(parent->IndexOf(aNode));
1.53 + }
1.54 + }
1.55 + aNode = parent;
1.56 + }
1.57 + }
1.58 +
1.59 + void PostPendingAppendNotification(nsIContent* aParent, nsIContent* aChild)
1.60 + {
1.61 + bool newParent = true;
1.62 + const nsIContentPtr* first = mElementsSeenInThisAppendBatch.Elements();
1.63 + const nsIContentPtr* last = first + mElementsSeenInThisAppendBatch.Length() - 1;
1.64 + for (const nsIContentPtr* iter = last; iter >= first; --iter) {
1.65 +#ifdef DEBUG_NS_HTML5_TREE_OP_EXECUTOR_FLUSH
1.66 + sAppendBatchSlotsExamined++;
1.67 +#endif
1.68 + if (*iter == aParent) {
1.69 + newParent = false;
1.70 + break;
1.71 + }
1.72 + }
1.73 + if (aChild->IsElement()) {
1.74 + mElementsSeenInThisAppendBatch.AppendElement(aChild);
1.75 + }
1.76 + mElementsSeenInThisAppendBatch.AppendElement(aParent);
1.77 + if (newParent) {
1.78 + mPendingNotifications.AppendElement(aParent);
1.79 + }
1.80 +#ifdef DEBUG_NS_HTML5_TREE_OP_EXECUTOR_FLUSH
1.81 + sAppendBatchExaminations++;
1.82 +#endif
1.83 + }
1.84 +
1.85 + void FlushPendingAppendNotifications()
1.86 + {
1.87 + NS_PRECONDITION(mFlushState == eInDocUpdate, "Notifications flushed outside update");
1.88 + mFlushState = eNotifying;
1.89 + const nsHtml5PendingNotification* start = mPendingNotifications.Elements();
1.90 + const nsHtml5PendingNotification* end = start + mPendingNotifications.Length();
1.91 + for (nsHtml5PendingNotification* iter = (nsHtml5PendingNotification*)start; iter < end; ++iter) {
1.92 + iter->Fire();
1.93 + }
1.94 + mPendingNotifications.Clear();
1.95 +#ifdef DEBUG_NS_HTML5_TREE_OP_EXECUTOR_FLUSH
1.96 + if (mElementsSeenInThisAppendBatch.Length() > sAppendBatchMaxSize) {
1.97 + sAppendBatchMaxSize = mElementsSeenInThisAppendBatch.Length();
1.98 + }
1.99 +#endif
1.100 + mElementsSeenInThisAppendBatch.Clear();
1.101 + NS_ASSERTION(mFlushState == eNotifying, "mFlushState out of sync");
1.102 + mFlushState = eInDocUpdate;
1.103 + }
1.104 +
1.105 + nsresult Init(nsIDocument* aDoc, nsIURI* aURI,
1.106 + nsISupports* aContainer, nsIChannel* aChannel);
1.107 +
1.108 + // Getters and setters for fields from nsContentSink
1.109 + nsIDocument* GetDocument()
1.110 + {
1.111 + return mDocument;
1.112 + }
1.113 +
1.114 + nsNodeInfoManager* GetNodeInfoManager()
1.115 + {
1.116 + return mNodeInfoManager;
1.117 + }
1.118 +
1.119 + /**
1.120 + * Marks this parser as broken and tells the stream parser (if any) to
1.121 + * terminate.
1.122 + *
1.123 + * @return aReason for convenience
1.124 + */
1.125 + virtual nsresult MarkAsBroken(nsresult aReason);
1.126 +
1.127 + /**
1.128 + * Checks if this parser is broken. Returns a non-NS_OK (i.e. non-0)
1.129 + * value if broken.
1.130 + */
1.131 + inline nsresult IsBroken()
1.132 + {
1.133 + return mBroken;
1.134 + }
1.135 +
1.136 + inline void BeginDocUpdate()
1.137 + {
1.138 + NS_PRECONDITION(mFlushState == eInFlush, "Tried to double-open update.");
1.139 + NS_PRECONDITION(mParser, "Started update without parser.");
1.140 + mFlushState = eInDocUpdate;
1.141 + mDocument->BeginUpdate(UPDATE_CONTENT_MODEL);
1.142 + }
1.143 +
1.144 + inline void EndDocUpdate()
1.145 + {
1.146 + NS_PRECONDITION(mFlushState != eNotifying, "mFlushState out of sync");
1.147 + if (mFlushState == eInDocUpdate) {
1.148 + FlushPendingAppendNotifications();
1.149 + mFlushState = eInFlush;
1.150 + mDocument->EndUpdate(UPDATE_CONTENT_MODEL);
1.151 + }
1.152 + }
1.153 +
1.154 + void SetDocumentCharsetAndSource(nsACString& aCharset, int32_t aCharsetSource);
1.155 +
1.156 + /**
1.157 + * Sets up style sheet load / parse
1.158 + */
1.159 + void UpdateStyleSheet(nsIContent* aElement);
1.160 +
1.161 + void SetDocumentMode(nsHtml5DocumentMode m);
1.162 +
1.163 + void SetNodeInfoManager(nsNodeInfoManager* aManager)
1.164 + {
1.165 + mNodeInfoManager = aManager;
1.166 + }
1.167 +
1.168 + // nsContentSink methods
1.169 + virtual void UpdateChildCounts();
1.170 + virtual nsresult FlushTags();
1.171 +
1.172 +protected:
1.173 + inline void SetAppendBatchCapacity(uint32_t aCapacity)
1.174 + {
1.175 + mElementsSeenInThisAppendBatch.SetCapacity(aCapacity);
1.176 + }
1.177 +
1.178 + nsHtml5DocumentBuilder(bool aRunsToCompletion);
1.179 + virtual ~nsHtml5DocumentBuilder();
1.180 +
1.181 +private:
1.182 + nsTArray<nsHtml5PendingNotification> mPendingNotifications;
1.183 + nsTArray<nsIContentPtr> mElementsSeenInThisAppendBatch;
1.184 +protected:
1.185 + nsTArray<nsCOMPtr<nsIContent> > mOwnedElements;
1.186 + /**
1.187 + * Non-NS_OK if this parser should refuse to process any more input.
1.188 + * For example, the parser needs to be marked as broken if it drops some
1.189 + * input due to a memory allocation failure. In such a case, the whole
1.190 + * parser needs to be marked as broken, because some input has been lost
1.191 + * and parsing more input could lead to a DOM where pieces of HTML source
1.192 + * that weren't supposed to become scripts become scripts.
1.193 + *
1.194 + * Since NS_OK is actually 0, zeroing operator new takes care of
1.195 + * initializing this.
1.196 + */
1.197 + nsresult mBroken;
1.198 + eHtml5FlushState mFlushState;
1.199 +};
1.200 +
1.201 +#endif // nsHtml5DocumentBuilder_h
