53 lines
2.0 KiB
C++
53 lines
2.0 KiB
C++
#include <mbgl/style/applied_class_properties.hpp>
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namespace mbgl {
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AppliedClassPropertyValue::AppliedClassPropertyValue(ClassID class_id, const TimePoint& begin_, const TimePoint& end_, const PropertyValue &value_)
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: name(class_id),
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begin(begin_),
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end(end_),
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value(value_) {}
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// Returns the ID of the most recent
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ClassID AppliedClassPropertyValues::mostRecent() const {
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return propertyValues.empty() ? ClassID::Fallback : propertyValues.back().name;
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}
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void AppliedClassPropertyValues::add(ClassID class_id, const TimePoint& begin, const TimePoint& end, const PropertyValue &value) {
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propertyValues.emplace_back(class_id, begin, end, value);
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}
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bool AppliedClassPropertyValues::hasTransitions() const {
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return propertyValues.size() > 1;
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}
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// Erase all items in the property list that are before a completed transition.
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// Then, if the only remaining property is a Fallback value, remove it too.
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void AppliedClassPropertyValues::cleanup(const TimePoint& now) {
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// Iterate backwards, but without using the rbegin/rend interface since we need forward
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// iterators to use .erase().
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for (auto it = propertyValues.end(), begin = propertyValues.begin(); it != begin;) {
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// If the property is finished, break iteration and delete all remaining items.
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if ((--it)->end <= now) {
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// Removes all items that precede the current iterator, but *not* the element currently
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// pointed to by the iterator. This preserves the last completed transition as the
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// first element in the property list.
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propertyValues.erase(begin, it);
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// Also erase the pivot element if it's a fallback value. This means we can remove the
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// entire applied properties object as well, because we already have the fallback
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// value set as the default.
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if (it->name == ClassID::Fallback) {
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propertyValues.erase(it);
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}
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break;
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}
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}
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}
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bool AppliedClassPropertyValues::empty() const {
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return propertyValues.empty();
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}
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}
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