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#include <mbgl/math/minmax.hpp>
#include <mbgl/text/tagged_string.hpp>
#include <mbgl/util/i18n.hpp>
#include <mbgl/util/logging.hpp>
namespace {
char16_t PUAbegin = u'\uE000';
char16_t PUAend = u'\uF8FF';
} // namespace
namespace mbgl {
void TaggedString::addTextSection(const std::u16string& sectionText,
double scale,
const FontStack& fontStack,
optional<Color> textColor) {
styledText.first += sectionText;
sections.emplace_back(scale, fontStack, std::move(textColor));
styledText.second.resize(styledText.first.size(), sections.size() - 1);
supportsVerticalWritingMode = nullopt;
}
void TaggedString::addImageSection(const std::string& imageID) {
const auto& nextImageSectionCharCode = getNextImageSectionCharCode();
if (!nextImageSectionCharCode) {
Log::Warning(Event::Style, "Exceeded maximum number of images in a label.");
return;
}
styledText.first += *nextImageSectionCharCode;
sections.emplace_back(imageID);
styledText.second.resize(styledText.first.size(), static_cast<uint8_t>(sections.size() - 1));
}
optional<char16_t> TaggedString::getNextImageSectionCharCode() {
if (imageSectionID == 0u) {
imageSectionID = PUAbegin;
return imageSectionID;
}
if (++imageSectionID > PUAend) {
return nullopt;
}
return imageSectionID;
}
void TaggedString::trim() {
std::size_t beginningWhitespace = styledText.first.find_first_not_of(u" \t\n\v\f\r");
if (beginningWhitespace == std::u16string::npos) {
// Entirely whitespace
styledText.first.clear();
styledText.second.clear();
} else {
std::size_t trailingWhitespace = styledText.first.find_last_not_of(u" \t\n\v\f\r") + 1;
styledText.first = styledText.first.substr(beginningWhitespace, trailingWhitespace - beginningWhitespace);
styledText.second = std::vector<uint8_t>(styledText.second.begin() + beginningWhitespace, styledText.second.begin() + trailingWhitespace);
}
}
double TaggedString::getMaxScale() const {
double maxScale = 0.0;
for (std::size_t i = 0; i < styledText.first.length(); i++) {
maxScale = util::max(maxScale, getSection(i).scale);
}
return maxScale;
}
void TaggedString::verticalizePunctuation() {
// Relies on verticalization changing characters in place so that style indices don't need updating
styledText.first = util::i18n::verticalizePunctuation(styledText.first);
}
bool TaggedString::allowsVerticalWritingMode() {
if (!supportsVerticalWritingMode) {
supportsVerticalWritingMode = util::i18n::allowsVerticalWritingMode(rawText());
}
return *supportsVerticalWritingMode;
}
} // namespace mbgl
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