Move a member function inRenderedText() out from PositionAlgorithm template class

Source/core/editing/Position.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2009 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
@@ skipping 865 matching lines @@
         return false;
 
     if (layoutObject->isBR()) {
         // TODO(leviw) The condition should be
         // m_anchorType == PositionAnchorType::BeforeAnchor, but for now we
         // still need to support legacy positions.
         return !m_offset && !isAfterAnchor() && !nodeIsUserSelectNone(Strategy::parent(*anchorNode()));
     }
 
     if (layoutObject->isText())
-        return !nodeIsUserSelectNone(anchorNode()) && inRenderedText();
+        return !nodeIsUserSelectNone(anchorNode()) && inRenderedText(*this);
 
     if (layoutObject->isSVG()) {
         // We don't consider SVG elements are contenteditable except for
         // associated layoutObject returns isText() true, e.g. LayoutSVGInlineText.
         return false;
     }
 
     if (isRenderedHTMLTableElement(anchorNode()) || Strategy::editingIgnoresContent(anchorNode()))
         return (atFirstEditingPositionForNode() || atLastEditingPositionForNode()) && !nodeIsUserSelectNone(Strategy::parent(*anchorNode()));
 
     if (isHTMLHtmlElement(*m_anchorNode))
         return false;
 
     if (layoutObject->isLayoutBlockFlow() || layoutObject->isFlexibleBox() || layoutObject->isLayoutGrid()) {
         if (toLayoutBlock(layoutObject)->logicalHeight() || isHTMLBodyElement(*m_anchorNode)) {
             if (!hasRenderedNonAnonymousDescendantsWithHeight(layoutObject))
                 return atFirstEditingPositionForNode() && !nodeIsUserSelectNone(anchorNode());
             return m_anchorNode->hasEditableStyle() && !nodeIsUserSelectNone(anchorNode()) && atEditingBoundary(*this);
         }
     } else {
         LocalFrame* frame = m_anchorNode->document().frame();
         bool caretBrowsing = frame->settings() && frame->settings()->caretBrowsingEnabled();
         return (caretBrowsing || m_anchorNode->hasEditableStyle()) && !nodeIsUserSelectNone(anchorNode()) && atEditingBoundary(*this);
     }
 
     return false;
 }
 
+// TODO(yosin) We should move |inRenderedText()| to "VisibleUnits.h" for
+// reduce dependency of |LayoutObject| in |Position| class.
 template <typename Strategy>
-bool PositionAlgorithm<Strategy>::inRenderedText() const
+static bool inRenderedTextAlgorithm(const PositionAlgorithm<Strategy>& position)
 {
-    if (isNull() || !anchorNode()->isTextNode())
+    Node* const anchorNode = position.anchorNode();
+    if (!anchorNode || !anchorNode->isTextNode())
         return false;
 
-    LayoutObject* layoutObject = anchorNode()->layoutObject();
+    LayoutObject* layoutObject = anchorNode->layoutObject();
     if (!layoutObject)
         return false;
 
+    const int offsetInNode = position.computeEditingOffset();
     LayoutText* textLayoutObject = toLayoutText(layoutObject);
     for (InlineTextBox *box = textLayoutObject->firstTextBox(); box; box = box->nextTextBox()) {
-        if (m_offset < static_cast<int>(box->start()) && !textLayoutObject->containsReversedText()) {
+        if (offsetInNode < static_cast<int>(box->start()) && !textLayoutObject->containsReversedText()) {
             // The offset we're looking for is before this node
             // this means the offset must be in content that is
             // not laid out. Return false.
             return false;
         }
-        if (box->containsCaretOffset(m_offset)) {
+        if (box->containsCaretOffset(offsetInNode)) {
             // Return false for offsets inside composed characters.
-            return m_offset == 0 || m_offset == textLayoutObject->nextOffset(textLayoutObject->previousOffset(m_offset));
+            return offsetInNode == 0 || offsetInNode == textLayoutObject->nextOffset(textLayoutObject->previousOffset(offsetInNode));
         }
     }
 
     return false;
 }
 
+bool inRenderedText(const Position& position)
+{
+    return inRenderedTextAlgorithm<EditingStrategy>(position);
+}
+
+bool inRenderedText(const PositionInComposedTree& position)
+{
+    return inRenderedTextAlgorithm<EditingInComposedTreeStrategy>(position);
+}
+
 bool isRenderedCharacter(const Position& position)
 {
     if (position.isNull())
         return false;
     ASSERT(position.isOffsetInAnchor());
     if (!position.anchorNode()->isTextNode())
         return false;
 
     LayoutObject* layoutObject = position.anchorNode()->layoutObject();
     if (!layoutObject)
@@ skipping 408 matching lines @@
 
 void showTree(const blink::Position* pos)
 {
     if (pos)
         pos->showTreeForThis();
     else
         fprintf(stderr, "Cannot showTree for (nil)\n");
 }
 
 #endif