Rendering text to a canvas in a frame-less document.

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 454 matching lines @@
     , m_elementDataCacheClearTimer(this, &Document::elementDataCacheClearTimerFired)
     , m_timeline(DocumentTimeline::create(this))
     , m_compositorPendingAnimations(new CompositorPendingAnimations())
     , m_templateDocumentHost(nullptr)
     , m_didAssociateFormControlsTimer(this, &Document::didAssociateFormControlsTimerFired)
     , m_timers(TaskRunnerHelper::get(TaskType::Timer, this)->clone())
     , m_hasViewportUnits(false)
     , m_parserSyncPolicy(AllowAsynchronousParsing)
     , m_nodeCount(0)
     , m_visibilityWasLogged(false)
+    , m_settings(Settings::create())

[Justin Novosad, 2016/09/12 18:44:59]

This should be lazily allocated in settings() instead of in the constructor
IMHO.

[zakerinasab, 2016/09/12 19:47:33]

Done.

 {
     if (m_frame) {
         DCHECK(m_frame->page());
         provideContextFeaturesToDocumentFrom(*this, *m_frame->page());
 
         m_fetcher = m_frame->loader().documentLoader()->fetcher();
         FrameFetchContext::provideDocumentToContext(m_fetcher->context(), this);
 
         CustomElementRegistry* registry = m_frame->localDOMWindow()
             ? m_frame->localDOMWindow()->maybeCustomElements()
@@ skipping 930 matching lines @@
     return m_frame ? m_frame->page() : nullptr;
 }
 
 FrameHost* Document::frameHost() const
 {
     return m_frame ? m_frame->host() : nullptr;
 }
 
 Settings* Document::settings() const
 {
-    return m_frame ? m_frame->settings() : nullptr;
+    if (m_frame)
+        return m_frame->settings();
+    return m_settings.get();
 }
 
 Range* Document::createRange()
 {
     return Range::create(*this);
 }
 
 NodeIterator* Document::createNodeIterator(Node* root, unsigned whatToShow, NodeFilter* filter)
 {
     DCHECK(root);
@@ skipping 4653 matching lines @@
 }
 
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().getString().utf8().data());
 }
 #endif