Move DragCaretController class to its own file

Source/core/editing/Caret.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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * 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
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/editing/Caret.h"
 
-#include "core/dom/Document.h"
 #include "core/editing/VisibleUnits.h"
 #include "core/editing/htmlediting.h"
-#include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
-#include "core/html/HTMLTextFormControlElement.h"
 #include "core/layout/LayoutBlock.h"
 #include "core/layout/LayoutView.h"
-#include "core/paint/DeprecatedPaintLayer.h"
 #include "platform/graphics/GraphicsContext.h"
 
 namespace blink {
 
 CaretBase::CaretBase(CaretVisibility visibility)
     : m_caretPainter(nullptr)
     , m_caretVisibility(visibility)
 {
 }
 
-DragCaretController::DragCaretController()
-    : CaretBase(Visible)
-{
-}
-
-PassOwnPtrWillBeRawPtr<DragCaretController> DragCaretController::create()
-{
-    return adoptPtrWillBeNoop(new DragCaretController);
-}
-
-bool DragCaretController::isContentRichlyEditable() const
-{
-    return isRichlyEditablePosition(m_position.deepEquivalent());
-}
-
-void DragCaretController::setCaretPosition(const VisiblePosition& position)
-{
-    // for querying Layer::compositingState()
-    // This code is probably correct, since it doesn't occur in a stack that involves updating compositing state.
-    DisableCompositingQueryAsserts disabler;
-
-    if (Node* node = m_position.deepEquivalent().deprecatedNode())
-        invalidateCaretRect(node);
-    m_position = position;
-    Document* document = nullptr;
-    if (Node* node = m_position.deepEquivalent().deprecatedNode()) {
-        invalidateCaretRect(node);
-        document = &node->document();
-    }
-    if (m_position.isNull() || m_position.isOrphan()) {
-        clearCaretRect();
-    } else {
-        document->updateLayoutTreeIfNeeded();
-        updateCaretRect(document, m_position);
-    }
-}
-
-static bool removingNodeRemovesPosition(Node& node, const Position& position)
-{
-    if (!position.anchorNode())
-        return false;
-
-    if (position.anchorNode() == node)
-        return true;
-
-    if (!node.isElementNode())
-        return false;
-
-    Element& element = toElement(node);
-    return element.containsIncludingShadowDOM(position.anchorNode());
-}
-
-void DragCaretController::nodeWillBeRemoved(Node& node)
-{
-    if (!hasCaret() || !node.inActiveDocument())
-        return;
-
-    if (!removingNodeRemovesPosition(node, m_position.deepEquivalent()))
-        return;
-
-    m_position.deepEquivalent().document()->layoutView()->clearSelection();
-    clear();
-}
-
-DEFINE_TRACE(DragCaretController)
-{
-    visitor->trace(m_position);
-}
-
 void CaretBase::clearCaretRect()
 {
     m_caretPainter = nullptr;
     m_caretLocalRect = LayoutRect();
 }
 
 static inline bool caretRendersInsideNode(Node* node)
 {
     return node && !isRenderedTableElement(node) && !editingIgnoresContent(node);
 }
@@ skipping 142 matching lines @@
         element = toElement(node);
     else
         element = node->parentElement();
 
     if (element && element->layoutObject())
         caretColor = element->layoutObject()->resolveColor(CSSPropertyColor);
 
     context->fillRect(caret, caretColor);
 }
 
-void DragCaretController::paintDragCaret(LocalFrame* frame, GraphicsContext* p, const LayoutPoint& paintOffset, const LayoutRect& clipRect) const
-{
-    if (m_position.deepEquivalent().deprecatedNode()->document().frame() == frame)
-        paintCaret(m_position.deepEquivalent().deprecatedNode(), p, paintOffset, clipRect);
-}
-
-}
+} // namespace blink