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GitHub Repository: hrydgard/ppsspp
 Path: blob/master/Common/Data/Text/WrapText.h
Views: 1401
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#pragma once

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#include <string>

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#include <string_view>

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class WordWrapper {

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public:

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	WordWrapper(std::string_view str, float maxW, int flags)

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		: str_(str), maxW_(maxW), flags_(flags) {

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	}

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	virtual ~WordWrapper() {}

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	// TODO: This should return a vector of std::string_view for the lines, instead of building up a new string.

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	std::string Wrapped();

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protected:

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	virtual float MeasureWidth(std::string_view str) = 0;

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	void Wrap();

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	bool WrapBeforeWord();

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	void AppendWord(int endIndex, int lastChar, bool addNewline);

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	void AddEllipsis();

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	static bool IsCJK(uint32_t c);

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	static bool IsPunctuation(uint32_t c);

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	static bool IsSpace(uint32_t c);

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	static bool IsShy(uint32_t c);

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	static bool IsSpaceOrShy(uint32_t c) {

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		return IsSpace(c) || IsShy(c);

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	}

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	const std::string_view str_;

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	const float maxW_;

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	const int flags_;

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	std::string out_;

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	// Index of last output / start of current word.

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	int lastIndex_ = 0;

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	// Ideal place to put an ellipsis if we run out of space.

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	int lastEllipsisIndex_ = -1;

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	// Index of last line start.

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	size_t lastLineStart_ = 0;

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	// Last character written to out_.

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	int lastChar_ = 0;

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	// Position the current word starts at.

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	float x_ = 0.0f;

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	// Most recent width of word since last index.

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	float wordWidth_ = 0.0f;

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	// Width of "..." when flag is set, zero otherwise.

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	float ellipsisWidth_ = 0.0f;

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	// Force the next word to cut partially and wrap.

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	bool forceEarlyWrap_ = false;

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	// Skip all characters until the next newline.

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	bool scanForNewline_ = false;

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	// Skip the next word, replaced with ellipsis.

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	bool skipNextWord_ = false;

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};

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