src/cobalt/base/unicode/character.h

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#ifndef COBALT_BASE_UNICODE_CHARACTER_H_
#define COBALT_BASE_UNICODE_CHARACTER_H_

#include "cobalt/base/unicode/character_values.h"

#include "third_party/icu/public/common/unicode/uchar.h"

namespace base {
namespace unicode {

// Returns true if any character is contained from a script that requires
// complex text shaping.
bool ContainsComplexScript(const UChar* characters, unsigned len);

// Returns true if the character should be treated as a space character during
// glyph lookup.
bool TreatAsSpace(UChar32 c);

// Returns true if the character should be treated as a zero-width space
// character during glyph lookup.
// NOTE: Complex shaping characters are treated as zero width spaces.
bool TreatAsZeroWidthSpace(UChar32 c);

// Returns true if the character should treated as a zero-width space character
// during glyph lookup within a complex script.
// NOTE: Complex shaping characters are not treated as zero width spaces.
bool TreatAsZeroWidthSpaceInComplexScript(UChar32 c);

// Returns true if this character is an emoji skin tone modifier.
bool IsEmojiModifier(UChar32 c);

// Returns a character normalized for spaces and zero width spaces prior to
// glyph lookup.
// NOTE: Complex shaping characters are normalized to zero width spaces.
UChar32 NormalizeSpaces(UChar32 character);

// Returns a character normalized for spaces and zero width spaces prior to
// glyph lookup within a complex script.
// NOTE: Complex shaping characters are not normalized to zero width spaces.
UChar32 NormalizeSpacesInComplexScript(UChar32 character);

}  // namespace unicode
}  // namespace base

#endif  // COBALT_BASE_UNICODE_CHARACTER_H_