Introduce DragController::hasCaretIn()

third_party/WebKit/Source/core/editing/DragCaretController.cpp

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
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  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 #include "core/editing/DragCaretController.h"
 
 #include "core/editing/EditingUtilities.h"
+#include "core/frame/Settings.h"
 #include "core/layout/api/LayoutViewItem.h"
 #include "core/paint/PaintLayer.h"
 
 namespace blink {
 
 DragCaretController::DragCaretController()
     : m_caretBase(new CaretBase(CaretVisibility::Visible))
 {
 }
 
 DragCaretController* DragCaretController::create()
 {
     return new DragCaretController;
 }
 
+bool DragCaretController::hasCaretIn(const LayoutBlock& layoutBlock) const
+{
+    Node* node = m_position.deepEquivalent().anchorNode();
+    if (!node)
+        return false;
+    if (layoutBlock != CaretBase::caretLayoutObject(node))
+        return false;
+    if (rootEditableElementOf(m_position))
+        return true;
+    Settings* settings = node->ownerDocument()->frame()->settings();
+    return settings && settings->caretBrowsingEnabled();
+}
+
 bool DragCaretController::isContentRichlyEditable() const
 {
     return isRichlyEditablePosition(m_position.deepEquivalent());
 }
 
 void DragCaretController::setCaretPosition(const PositionWithAffinity& position)
 {
     // for querying Layer::compositingState()
     // This code is probably correct, since it doesn't occur in a stack that
     // involves updating compositing state.
@@ skipping 41 matching lines @@
     m_position.deepEquivalent().document()->layoutViewItem().clearSelection();
     clear();
 }
 
 DEFINE_TRACE(DragCaretController)
 {
     visitor->trace(m_position);
     visitor->trace(m_caretBase);
 }
 
-LayoutBlock* DragCaretController::caretLayoutObject() const
-{
-    return CaretBase::caretLayoutObject(m_position.deepEquivalent().anchorNode());
-}
-
-bool DragCaretController::isContentEditable() const
-{
-    return rootEditableElementOf(m_position);
-}
-
 void DragCaretController::paintDragCaret(LocalFrame* frame, GraphicsContext& context, const LayoutPoint& paintOffset) const
 {
     if (m_position.deepEquivalent().anchorNode()->document().frame() == frame)
         m_caretBase->paintCaret(m_position.deepEquivalent().anchorNode(), context, paintOffset);
 }
 
 } // namespace blink