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/*
* Copyright 2013 Jeremie Roy. All rights reserved.
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
*/
#ifndef TEXT_METRICS_H_HEADER_GUARD
#define TEXT_METRICS_H_HEADER_GUARD
#include "font_manager.h"
class TextMetrics
{
public:
TextMetrics(FontManager* _fontManager);
/// Append an ASCII/utf-8 string to the metrics helper.
void appendText(FontHandle _fontHandle, const char* _string);
/// Append a wide char string to the metrics helper.
void appendText(FontHandle _fontHandle, const wchar_t* _string);
/// Return the width of the measured text.
float getWidth() const { return m_width; }
/// Return the height of the measured text.
float getHeight() const { return m_height; }
/// Clear the width and height of the measured text.
void clearText();
private:
FontManager* m_fontManager;
float m_width;
float m_height;
float m_x;
float m_lineHeight;
float m_lineGap;
};
/// Compute text crop area for text using a single font.
class TextLineMetrics
{
public:
TextLineMetrics(const FontInfo& _fontInfo);
/// Return the height of a line of text using the given font.
float getLineHeight() const { return m_lineHeight; }
/// Return the number of text line in the given text.
uint32_t getLineCount(const char* _string) const;
/// Return the number of text line in the given text.
uint32_t getLineCount(const wchar_t* _string) const;
/// Return the first and last character visible in the [_firstLine, _lastLine] range.
void getSubText(const char* _string, uint32_t _firstLine, uint32_t _lastLine, const char*& _begin, const char*& _end);
/// Return the first and last character visible in the [_firstLine, _lastLine] range.
void getSubText(const wchar_t* _string, uint32_t _firstLine, uint32_t _lastLine, const wchar_t*& _begin, const wchar_t*& _end);
/// Return the first and last character visible in the [_top, _bottom] range,
void getVisibleText(const char* _string, float _top, float _bottom, const char*& _begin, const char*& _end);
/// Return the first and last character visible in the [_top, _bottom] range,
void getVisibleText(const wchar_t* _string, float _top, float _bottom, const wchar_t*& _begin, const wchar_t*& _end);
private:
float m_lineHeight;
};
#endif // TEXT_METRICS_H_HEADER_GUARD
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