ppsspp/ext/native/util/text/wrap_text.h

#pragma once

#include <string>

class WordWrapper {
public:
	WordWrapper(const char *str, float maxW, int flags)
		: str_(str), maxW_(maxW), flags_(flags) {
	}

	std::string Wrapped();

protected:
	virtual float MeasureWidth(const char *str, size_t bytes) = 0;
	void Wrap();
	bool WrapBeforeWord();
	void AppendWord(int endIndex, bool addNewline);

	static bool IsCJK(uint32_t c);
	static bool IsPunctuation(uint32_t c);
	static bool IsSpace(uint32_t c);
	static bool IsShy(uint32_t c);

	const char *const str_;
	const float maxW_;
	const int flags_;
	std::string out_;

	// Index of last output / start of current word.
	int lastIndex_ = 0;
	// Index of last line start.
	size_t lastLineStart_ = 0;
	// Position the current word starts at.
	float x_ = 0.0f;
	// Most recent width of word since last index.
	float wordWidth_ = 0.0f;
	// Width of "..." when flag is set, zero otherwise.
	float ellipsisWidth_ = 0.0f;
	// Force the next word to cut partially and wrap.
	bool forceEarlyWrap_ = false;
	// Skip all characters until the next newline.
	bool scanForNewline_ = false;
};