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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef SmartClip_h
     32 #define SmartClip_h
     33 
     34 #include "core/dom/Node.h"
     35 #include "core/frame/LocalFrame.h"
     36 #include "platform/heap/Handle.h"
     37 
     38 namespace blink {
     39 
     40 class SmartClipData {
     41 public:
     42     SmartClipData()
     43         : m_isEmpty(true)
     44     {
     45     }
     46 
     47     SmartClipData(Node* node, IntRect rect, String string)
     48         : m_isEmpty(!node)
     49         , m_rect(rect)
     50         , m_string(string)
     51     {
     52     }
     53 
     54     IntRect rect() const;
     55     const String& clipData() const;
     56 
     57 private:
     58     bool m_isEmpty;
     59     IntRect m_rect;
     60     String m_string;
     61 };
     62 
     63 // SmartClip implements support for the copy operation
     64 // with an S-Pen on Samsung devices. The behavior of this
     65 // class is quirky and poorly tested. It's approximately
     66 // trying to do a poor-mans implementation of columnar
     67 // selection followed by a copy operation.
     68 class SmartClip {
     69     STACK_ALLOCATED();
     70 public:
     71     explicit SmartClip(PassRefPtrWillBeRawPtr<LocalFrame>);
     72 
     73     SmartClipData dataForRect(const IntRect&);
     74 
     75 private:
     76     float pageScaleFactor();
     77 
     78     Node* minNodeContainsNodes(Node* minNode, Node* newNode);
     79     Node* findBestOverlappingNode(Node*, const IntRect& cropRect);
     80     bool shouldSkipBackgroundImage(Node*);
     81     void collectOverlappingChildNodes(Node* parentNode, const IntRect& cropRect, WillBeHeapVector<RawPtrWillBeMember<Node> >& overlappingNodeInfoTable);
     82     IntRect convertRectToWindow(const IntRect& nodeRect);
     83     String extractTextFromNode(Node*);
     84 
     85     RefPtrWillBeMember<LocalFrame> m_frame;
     86 };
     87 
     88 } // namespace blink
     89 
     90 #endif // SmartClip_h
     91