1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/views/SkTextBox.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,77 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2006 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#ifndef SkTextBox_DEFINED
1.14 +#define SkTextBox_DEFINED
1.15 +
1.16 +#include "SkCanvas.h"
1.17 +
1.18 +/** \class SkTextBox
1.19 +
1.20 + SkTextBox is a helper class for drawing 1 or more lines of text
1.21 + within a rectangle. The textbox is positioned and clipped by its Frame.
1.22 + The Margin rectangle controls where the text is drawn relative to
1.23 + the Frame. Line-breaks occur inside the Margin rectangle.
1.24 +
1.25 + Spacing is a linear equation used to compute the distance between lines
1.26 + of text. Spacing consists of two scalars: mul and add, and the spacing
1.27 + between lines is computed as: spacing = paint.getTextSize() * mul + add
1.28 +*/
1.29 +class SkTextBox {
1.30 +public:
1.31 + SkTextBox();
1.32 +
1.33 + enum Mode {
1.34 + kOneLine_Mode,
1.35 + kLineBreak_Mode,
1.36 +
1.37 + kModeCount
1.38 + };
1.39 + Mode getMode() const { return (Mode)fMode; }
1.40 + void setMode(Mode);
1.41 +
1.42 + enum SpacingAlign {
1.43 + kStart_SpacingAlign,
1.44 + kCenter_SpacingAlign,
1.45 + kEnd_SpacingAlign,
1.46 +
1.47 + kSpacingAlignCount
1.48 + };
1.49 + SpacingAlign getSpacingAlign() const { return (SpacingAlign)fSpacingAlign; }
1.50 + void setSpacingAlign(SpacingAlign);
1.51 +
1.52 + void getBox(SkRect*) const;
1.53 + void setBox(const SkRect&);
1.54 + void setBox(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom);
1.55 +
1.56 + void getSpacing(SkScalar* mul, SkScalar* add) const;
1.57 + void setSpacing(SkScalar mul, SkScalar add);
1.58 +
1.59 + void draw(SkCanvas*, const char text[], size_t len, const SkPaint&);
1.60 +
1.61 + void setText(const char text[], size_t len, const SkPaint&);
1.62 + void draw(SkCanvas*);
1.63 + int countLines() const;
1.64 + SkScalar getTextHeight() const;
1.65 +
1.66 +private:
1.67 + SkRect fBox;
1.68 + SkScalar fSpacingMul, fSpacingAdd;
1.69 + uint8_t fMode, fSpacingAlign;
1.70 + const char* fText;
1.71 + size_t fLen;
1.72 + const SkPaint* fPaint;
1.73 +};
1.74 +
1.75 +class SkTextLineBreaker {
1.76 +public:
1.77 + static int CountLines(const char text[], size_t len, const SkPaint&, SkScalar width);
1.78 +};
1.79 +
1.80 +#endif
