78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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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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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};
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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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