1 files changed, 42 insertions, 0 deletions
diff --git a/src/mbgl/text/tagged_string.cpp b/src/mbgl/text/tagged_string.cpp
new file mode 100644
index 0000000000..e199a7c962
--- /dev/null
+++ b/src/mbgl/text/tagged_string.cpp
@@ -0,0 +1,42 @@
+#include <mbgl/text/tagged_string.hpp>
+#include <mbgl/util/i18n.hpp>
+
+#include <boost/algorithm/string.hpp>
+
+namespace mbgl {
+    
+void TaggedString::addSection(const std::u16string& sectionText, double scale, FontStackHash fontStack) {
+    styledText.first += sectionText;
+    sections.emplace_back(scale, fontStack);
+    styledText.second.resize(styledText.first.size(), sections.size() - 1);
+}
+
+void TaggedString::trim() {
+    auto whiteSpace = boost::algorithm::is_any_of(u" \t\n\v\f\r");
+    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 = std::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);
+}
+
+} // namespace mbgl