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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, LayerAndroid* root);
     61     void updateHandleScale(float handleScale);
     62     void getSelectionHandles(int* handles, LayerAndroid* root);
     63 public:
     64     float m_inverseScale; // inverse scale, x, y used for drawing select path
     65     int m_selectX;
     66     int m_selectY;
     67 private:
     68     int m_controlWidth;
     69     int m_controlHeight;
     70     int m_controlSlop;
     71     class FirstCheck;
     72     class EdgeCheck;
     73     void drawSelectionPointer(SkCanvas* , IntRect* );
     74     void drawSelectionRegion(SkCanvas* , IntRect* );
     75     SkIRect findClosest(FirstCheck& , const SkPicture& , int* base);
     76     SkIRect findEdge(const SkPicture& , const SkIRect& area,
     77         int x, int y, bool left, int* base);
     78     SkIRect findLeft(const SkPicture& picture, const SkIRect& area,
     79         int x, int y, int* base);
     80     SkIRect findRight(const SkPicture& picture, const SkIRect& area,
     81         int x, int y, int* base);
     82     static void getSelectionArrow(SkPath* );
     83     void getSelectionCaret(SkPath* );
     84     bool hitCorner(int cx, int cy, int x, int y) const;
     85     bool hitStartHandle(int x, int y) const;
     86     bool hitEndHandle(int x, int y) const;
     87     void setVisibleRect(const IntRect& );
     88     void swapAsNeeded();
     89     SkIPoint m_original; // computed start of extend selection
     90     SkIPoint m_startOffset; // difference from global to layer
     91     SkIRect m_selStart;
     92     SkIRect m_selEnd;
     93     SkIRect m_lastStart;
     94     SkIRect m_lastEnd;
     95     SkIRect m_lastDrawnStart;
     96     SkIRect m_lastDrawnEnd;
     97     SkIRect m_wordBounds;
     98     int m_startBase;
     99     int m_endBase;
    100     int m_layerId;
    101     SkIRect m_visibleRect; // constrains picture computations to visible area
    102     SkRegion m_lastSelRegion;
    103     SkRegion m_selRegion; // computed from sel start, end
    104     SkPicture m_startControl;
    105     SkPicture m_endControl;
    106     const SkPicture* m_picture;
    107     bool m_drawPointer;
    108     bool m_extendSelection; // false when trackball is moving pointer
    109     bool m_flipped;
    110     bool m_hitTopLeft;
    111     bool m_startSelection;
    112     bool m_wordSelection;
    113     bool m_outsideWord;
    114 };
    115 
    116 }
    117 
    118 namespace WebCore {
    119 
    120 void ReverseBidi(UChar* chars, int len);
    121 
    122 }
    123 
    124 #endif
    125