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      1 /*
      2  * Copyright 2008, The Android Open Source Project
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *  * Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  *  * Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef SelectText_h
     27 #define SelectText_h
     28 
     29 #include "DrawExtra.h"
     30 #include "IntPoint.h"
     31 #include "IntRect.h"
     32 #include "PlatformString.h"
     33 #include "SkPath.h"
     34 #include "SkPicture.h"
     35 #include "SkRect.h"
     36 #include "SkRegion.h"
     37 
     38 namespace android {
     39 
     40 class CachedRoot;
     41 
     42 class SelectText : public DrawExtra {
     43 public:
     44     SelectText();
     45     virtual ~SelectText();
     46     virtual void draw(SkCanvas* , LayerAndroid* , IntRect* );
     47     void extendSelection(const IntRect& vis, int x, int y);
     48     const String getSelection();
     49     bool hitSelection(int x, int y) const;
     50     void moveSelection(const IntRect& vis, int x, int y);
     51     void reset();
     52     IntPoint selectableText(const CachedRoot* );
     53     void selectAll();
     54     int selectionX() const;
     55     int selectionY() const;
     56     void setDrawPointer(bool drawPointer) { m_drawPointer = drawPointer; }
     57     void setExtendSelection(bool extend) { m_extendSelection = extend; }
     58     bool startSelection(const CachedRoot* , const IntRect& vis, int x, int y);
     59     bool wordSelection(const CachedRoot* , const IntRect& vis, int x, int y);
     60     void getSelectionRegion(const IntRect& vis, SkRegion *region);
     61     void updateHandleScale(float handleScale);
     62 public:
     63     float m_inverseScale; // inverse scale, x, y used for drawing select path
     64     int m_selectX;
     65     int m_selectY;
     66 private:
     67     int m_controlWidth;
     68     int m_controlHeight;
     69     class FirstCheck;
     70     class EdgeCheck;
     71     void drawSelectionPointer(SkCanvas* , IntRect* );
     72     void drawSelectionRegion(SkCanvas* , IntRect* );
     73     SkIRect findClosest(FirstCheck& , const SkPicture& , int* base);
     74     SkIRect findEdge(const SkPicture& , const SkIRect& area,
     75         int x, int y, bool left, int* base);
     76     SkIRect findLeft(const SkPicture& picture, const SkIRect& area,
     77         int x, int y, int* base);
     78     SkIRect findRight(const SkPicture& picture, const SkIRect& area,
     79         int x, int y, int* base);
     80     static void getSelectionArrow(SkPath* );
     81     void getSelectionCaret(SkPath* );
     82     bool hitCorner(int cx, int cy, int x, int y) const;
     83     bool hitStartHandle(int x, int y) const;
     84     bool hitEndHandle(int x, int y) const;
     85     void setVisibleRect(const IntRect& );
     86     void swapAsNeeded();
     87     SkIPoint m_original; // computed start of extend selection
     88     SkIPoint m_startOffset; // difference from global to layer
     89     SkIRect m_selStart;
     90     SkIRect m_selEnd;
     91     SkIRect m_lastStart;
     92     SkIRect m_lastEnd;
     93     SkIRect m_lastDrawnStart;
     94     SkIRect m_lastDrawnEnd;
     95     SkIRect m_wordBounds;
     96     int m_startBase;
     97     int m_endBase;
     98     int m_layerId;
     99     SkIRect m_visibleRect; // constrains picture computations to visible area
    100     SkRegion m_lastSelRegion;
    101     SkRegion m_selRegion; // computed from sel start, end
    102     SkPicture m_startControl;
    103     SkPicture m_endControl;
    104     const SkPicture* m_picture;
    105     bool m_drawPointer;
    106     bool m_extendSelection; // false when trackball is moving pointer
    107     bool m_flipped;
    108     bool m_hitTopLeft;
    109     bool m_startSelection;
    110     bool m_wordSelection;
    111     bool m_outsideWord;
    112 };
    113 
    114 }
    115 
    116 namespace WebCore {
    117 
    118 void ReverseBidi(UChar* chars, int len);
    119 
    120 }
    121 
    122 #endif
    123