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Diffstat (limited to 'include/utils/SkTextBox.h')
-rw-r--r-- | include/utils/SkTextBox.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/include/utils/SkTextBox.h b/include/utils/SkTextBox.h new file mode 100644 index 0000000000..2c34448977 --- /dev/null +++ b/include/utils/SkTextBox.h @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2006 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef SkTextBox_DEFINED +#define SkTextBox_DEFINED + +#include "SkCanvas.h" + +/** \class SkTextBox + + SkTextBox is a helper class for drawing 1 or more lines of text + within a rectangle. The textbox is positioned and clipped by its Frame. + The Margin rectangle controls where the text is drawn relative to + the Frame. Line-breaks occur inside the Margin rectangle. + + Spacing is a linear equation used to compute the distance between lines + of text. Spacing consists of two scalars: mul and add, and the spacing + between lines is computed as: spacing = paint.getTextSize() * mul + add +*/ +class SkTextBox { +public: + SkTextBox(); + + enum Mode { + kOneLine_Mode, + kLineBreak_Mode, + + kModeCount + }; + Mode getMode() const { return (Mode)fMode; } + void setMode(Mode); + + enum SpacingAlign { + kStart_SpacingAlign, + kCenter_SpacingAlign, + kEnd_SpacingAlign, + + kSpacingAlignCount + }; + SpacingAlign getSpacingAlign() const { return (SpacingAlign)fSpacingAlign; } + void setSpacingAlign(SpacingAlign); + + void getBox(SkRect*) const; + void setBox(const SkRect&); + void setBox(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom); + + void getSpacing(SkScalar* mul, SkScalar* add) const; + void setSpacing(SkScalar mul, SkScalar add); + + void draw(SkCanvas*, const char text[], size_t len, const SkPaint&); + +private: + SkRect fBox; + SkScalar fSpacingMul, fSpacingAdd; + uint8_t fMode, fSpacingAlign; +}; + +class SkTextLineBreaker { +public: + static int CountLines(const char text[], size_t len, const SkPaint&, SkScalar width); +}; + +#endif + |