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#include "cru/ui/style/StyleRuleSet.hpp"
#include "cru/common/Event.hpp"
#include "gsl/gsl_assert"
#include <unordered_set>
namespace cru::ui::style {
void StyleRuleSet::AddStyleRule(StyleRule rule, gsl::index index) {
Expects(index >= 0 && index <= GetSize());
rules_.insert(rules_.cbegin() + index, std::move(rule));
UpdateChangeListener();
UpdateStyle();
}
void StyleRuleSet::RemoveStyleRule(gsl::index index, gsl::index count) {
Expects(index >= 0);
Expects(count >= 0 && index + count <= GetSize());
rules_.erase(rules_.cbegin() + index, rules_.cbegin() + index + count);
UpdateChangeListener();
UpdateStyle();
}
void StyleRuleSet::Set(const StyleRuleSet& other) {
rules_ = other.rules_;
UpdateChangeListener();
UpdateStyle();
}
void StyleRuleSet::UpdateChangeListener() {
if (control_ == nullptr) return;
guard_.Clear();
std::unordered_set<IBaseEvent*> events;
for (const auto& rule : rules_) {
auto e = rule.GetCondition()->ChangeOn(control_);
events.insert(e.cbegin(), e.cend());
}
for (auto e : events) {
guard_ += e->AddSpyOnlyHandler([this] { this->UpdateStyle(); });
}
}
void StyleRuleSet::UpdateStyle() {
if (control_ == nullptr) return;
for (const auto& rule : rules_) {
if (rule.GetCondition()->Judge(control_)) {
rule.GetStyler()->Apply(control_);
}
}
}
} // namespace cru::ui::style
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