[css-display] Support display: contents pseudo-elements.

third_party/WebKit/Source/core/layout/LayoutText.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 132 matching lines @@
               : WTF::Unicode::toTitleCase(stringWithPrevious[startOfWord]));
     }
     for (int i = startOfWord + 1; i < endOfWord; i++)
       result.append(input[i - 1]);
   }
 
   *string = result.toString();
 }
 
 LayoutText::LayoutText(Node* node, PassRefPtr<StringImpl> str)
-    : LayoutObject(!node || node->isDocumentNode() ? 0 : node),
+    : LayoutObject(node),
       m_hasTab(false),
       m_linesDirty(false),
       m_containsReversedText(false),
       m_knownToHaveNoOverflowAndNoFallbackFonts(false),
       m_minWidth(-1),
       m_maxWidth(-1),
       m_firstLineMinWidth(0),
       m_lastLineLineMinWidth(0),
       m_text(std::move(str)),
       m_firstTextBox(nullptr),
       m_lastTextBox(nullptr) {
   ASSERT(m_text);
-  // FIXME: Some clients of LayoutText (and subclasses) pass Document as node to
-  // create anonymous layoutObject.
-  // They should be switched to passing null and using setDocumentForAnonymous.
-  if (node && node->isDocumentNode())
-    setDocumentForAnonymous(toDocument(node));
-
   setIsText();
 
-  view()->frameView()->incrementVisuallyNonEmptyCharacterCount(m_text.length());
+  DCHECK(!node || !node->isDocumentNode());
+  if (node)
+    frameView()->incrementVisuallyNonEmptyCharacterCount(m_text.length());
 }
 
 #if DCHECK_IS_ON()
 
 LayoutText::~LayoutText() {
   ASSERT(!m_firstTextBox);
   ASSERT(!m_lastTextBox);
 }
 
 #endif
@@ skipping 1839 matching lines @@
     gSecureTextTimers->insert(this, secureTextTimer);
   }
   secureTextTimer->restartWithNewText(lastTypedCharacterOffset);
 }
 
 PassRefPtr<AbstractInlineTextBox> LayoutText::firstAbstractInlineTextBox() {
   return AbstractInlineTextBox::getOrCreate(LineLayoutText(this),
                                             m_firstTextBox);
 }
 
+LayoutText* LayoutText::createEmptyAnonymous(Document& doc) {
+  LayoutText* text = new LayoutText(nullptr, StringImpl::empty);
+  text->setDocumentForAnonymous(&doc);
+  return text;
+}
+
 void LayoutText::invalidateDisplayItemClients(
     PaintInvalidationReason invalidationReason) const {
   ObjectPaintInvalidator paintInvalidator(*this);
   paintInvalidator.invalidateDisplayItemClient(*this, invalidationReason);
 
   for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {
     paintInvalidator.invalidateDisplayItemClient(*box, invalidationReason);
     if (box->truncation() != cNoTruncation) {
       if (EllipsisBox* ellipsisBox = box->root().ellipsisBox())
         paintInvalidator.invalidateDisplayItemClient(*ellipsisBox,
                                                      invalidationReason);
     }
   }
 }
 
 // TODO(lunalu): Would be better to dump the bounding box x and y rather than
 // the first run's x and y, but that would involve updating many test results.
 LayoutRect LayoutText::debugRect() const {
   IntRect linesBox = enclosingIntRect(linesBoundingBox());
   LayoutRect rect = LayoutRect(
       IntRect(firstRunX(), firstRunY(), linesBox.width(), linesBox.height()));
   LayoutBlock* block = containingBlock();
   if (block && hasTextBoxes())
     block->adjustChildDebugRect(rect);
 
   return rect;
 }
 
 }  // namespace blink