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#pragma once
#include <string>
namespace mbgl {
namespace util {
namespace i18n {
/** Returns whether a line break can be inserted after the character indicated
by the given Unicode codepoint due to word breaking. */
bool allowsWordBreaking(char16_t chr);
/** Returns whether a line break can be inserted after any character in the
given string. If false, line breaking should occur on word boundaries
instead. */
bool allowsIdeographicBreaking(const std::u16string& string);
/** Returns whether a line break can be inserted after the character indicated
by the given Unicode codepoint due to ideographic breaking. */
bool allowsIdeographicBreaking(char16_t chr);
/** Returns whether any substring of the given string can be drawn as vertical
text with upright glyphs. */
bool allowsVerticalWritingMode(const std::u16string& string);
/** Returns true if the given Unicode codepoint identifies a character with
upright orientation.
A character has upright orientation if it is drawn upright (unrotated)
whether the line is oriented horizontally or vertically, even if both
adjacent characters can be rotated. For example, a Chinese character is
always drawn upright. An uprightly oriented character causes an adjacent
“neutral” character to be drawn upright as well. */
bool hasUprightVerticalOrientation(char16_t chr);
/** Returns true if the given Unicode codepoint identifies a character with
neutral orientation.
A character has neutral orientation if it may be drawn rotated or unrotated
when the line is oriented vertically, depending on the orientation of the
adjacent characters. For example, along a verticlly oriented line, the
vulgar fraction ½ is drawn upright among Chinese characters but rotated
among Latin letters. A neutrally oriented character does not influence
whether an adjacent character is drawn upright or rotated.
*/
bool hasNeutralVerticalOrientation(char16_t chr);
/** Returns true if the given Unicode codepoint identifies a character with
rotated orientation.
A character has rotated orientation if it is drawn rotated when the line is
oriented vertically, even if both adjacent characters are upright. For
example, a Latin letter is drawn rotated along a vertical line. A rotated
character causes an adjacent “neutral” character to be drawn rotated as
well.
*/
bool hasRotatedVerticalOrientation(char16_t chr);
/** Returns a copy of the given string with punctuation characters replaced with
their vertical forms wherever applicable. */
std::u16string verticalizePunctuation(const std::u16string& input);
/** Returns the form of the given character appropriate for vertical text.
@return The character’s specialized vertical form; 0 if not applicable. */
char16_t verticalizePunctuation(char16_t chr);
} // namespace i18n
} // namespace util
} // namespace mbgl
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