63fd760a37
Also adds a presubmit to prevent adding trailing whitespace to source code in the future. Change-Id: I41a4df81487f6f00aa19b188f0cac6a3377efde6 Reviewed-on: https://skia-review.googlesource.com/57380 Reviewed-by: Ravi Mistry <rmistry@google.com> Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Ben Wagner <bungeman@google.com>
88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
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/*
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* Copyright 2006 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkTextBox_DEFINED
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#define SkTextBox_DEFINED
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#include "SkCanvas.h"
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/** \class SkTextBox
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SkTextBox is a helper class for drawing 1 or more lines of text
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within a rectangle. The textbox is positioned and clipped by its Frame.
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The Margin rectangle controls where the text is drawn relative to
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the Frame. Line-breaks occur inside the Margin rectangle.
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Spacing is a linear equation used to compute the distance between lines
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of text. Spacing consists of two scalars: mul and add, and the spacing
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between lines is computed as: spacing = paint.getTextSize() * mul + add
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*/
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class SkTextBox {
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public:
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SkTextBox();
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enum Mode {
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kOneLine_Mode,
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kLineBreak_Mode,
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kModeCount
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};
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Mode getMode() const { return (Mode)fMode; }
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void setMode(Mode);
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enum SpacingAlign {
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kStart_SpacingAlign,
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kCenter_SpacingAlign,
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kEnd_SpacingAlign,
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kSpacingAlignCount
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};
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SpacingAlign getSpacingAlign() const { return (SpacingAlign)fSpacingAlign; }
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void setSpacingAlign(SpacingAlign);
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void getBox(SkRect*) const;
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void setBox(const SkRect&);
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void setBox(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom);
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void getSpacing(SkScalar* mul, SkScalar* add) const;
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void setSpacing(SkScalar mul, SkScalar add);
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void draw(SkCanvas*, const char text[], size_t len, const SkPaint&);
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void setText(const char text[], size_t len, const SkPaint&);
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void draw(SkCanvas*);
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int countLines() const;
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SkScalar getTextHeight() const;
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sk_sp<SkTextBlob> snapshotTextBlob(SkScalar* computedBottom) const;
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class Visitor {
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public:
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virtual ~Visitor() {}
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virtual void operator()(const char*, size_t, SkScalar x, SkScalar y, const SkPaint&) = 0;
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};
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private:
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SkRect fBox;
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SkScalar fSpacingMul, fSpacingAdd;
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uint8_t fMode, fSpacingAlign;
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const char* fText;
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size_t fLen;
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const SkPaint* fPaint;
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SkScalar visit(Visitor&, const char text[], size_t len, const SkPaint&) const;
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};
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class SkTextLineBreaker {
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public:
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static int CountLines(const char text[], size_t len, const SkPaint&, SkScalar width);
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};
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#endif
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