Return EphemeralRange from Editor::findRangeOfString.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/editing/EphemeralRange.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/Range.h"
 #include "core/dom/Text.h"
+#include "core/layout/LayoutText.h"
 
 namespace blink {
 
 template <typename Strategy>
 EphemeralRangeTemplate<Strategy>::EphemeralRangeTemplate(const PositionTemplate<Strategy>& start, const PositionTemplate<Strategy>& end)
     : m_startPosition(start)
     , m_endPosition(end)
 #if ENABLE(ASSERT)
     , m_domTreeVersion(start.isNull() ? 0 : start.document()->domTreeVersion())
 #endif
@@ skipping 94 matching lines @@
     ASSERT(isValid());
     return m_startPosition == m_endPosition;
 }
 
 template <typename Strategy>
 EphemeralRangeTemplate<Strategy> EphemeralRangeTemplate<Strategy>::rangeOfContents(const Node& node)
 {
     return EphemeralRangeTemplate<Strategy>(PositionTemplate<Strategy>::firstPositionInNode(&const_cast<Node&>(node)), PositionTemplate<Strategy>::lastPositionInNode(&const_cast<Node&>(node)));
 }
 
+static IntRect uniteRects(const Vector<IntRect>& rects)
+{
+    IntRect result;
+    for (const auto& rect : rects)
+        result.unite(rect);
+    return result;
+}
+
+template <typename Strategy>
+IntRect EphemeralRangeTemplate<Strategy>::textBoundingBox() const

[yosin_UTC9, 2015/11/02 03:44:17]

Rather than copying code from Range::textRects(), can we share the code between
EphemeralRange and Range?

[Andrey Kraynov, 2015/11/02 14:06:57]

I tried to do it.
Pros: it can be used to shorten both Range::textQuads and Range::textRects
function and remove code duplication.

Cons: my new function is quite ugly =(
Too many parameters and two overloads for IntRect and FloatQuad.

I failed to use NodeTraversalIterator here, because my function isn't a template
function.

+{
+    if (isCollapsed())
+        return IntRect();
+
+    Node* const startContainer = m_startPosition.computeContainerNode();
+    ASSERT(startContainer);
+    Node* const endContainer = m_endPosition.computeContainerNode();
+    ASSERT(endContainer);
+
+    IntRect result;
+    Vector<IntRect> rects;
+    Node* stopNode = m_endPosition.nodeAsRangePastLastNode();
+    for (Node* node = m_startPosition.nodeAsRangeFirstNode(); node != stopNode; node = Strategy::next(*node)) {
+        LayoutObject* const layoutObject = node->layoutObject();
+        if (!layoutObject || !layoutObject->isText())
+            continue;
+
+        const int startOffset = node == startContainer ? m_startPosition.computeOffsetInContainerNode() : 0;
+        const int endOffset = node == endContainer ? m_endPosition.computeOffsetInContainerNode() : std::numeric_limits<int>::max();
+        toLayoutText(layoutObject)->absoluteRectsForRange(rects, startOffset, endOffset);
+
+        result.unite(uniteRects(rects));
+        rects.clear();
+    }
+
+    return result;
+}
+
 #if ENABLE(ASSERT)
 template <typename Strategy>
 bool EphemeralRangeTemplate<Strategy>::isValid() const
 {
     return m_startPosition.isNull() || m_domTreeVersion == m_startPosition.document()->domTreeVersion();
 }
 #else
 template <typename Strategy>
 bool EphemeralRangeTemplate<Strategy>::isValid() const
 {
     return true;
 }
 #endif
 
 PassRefPtrWillBeRawPtr<Range> createRange(const EphemeralRange& range)
 {
     if (range.isNull())
         return nullptr;
     return Range::create(range.document(), range.startPosition(), range.endPosition());
 }
 
 template class CORE_TEMPLATE_EXPORT EphemeralRangeTemplate<EditingStrategy>;
 template class CORE_TEMPLATE_EXPORT EphemeralRangeTemplate<EditingInComposedTreeStrategy>;
 
 } // namespace blink