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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/fonts/font_fallback_map.h"
#include "third_party/blink/renderer/platform/fonts/font_selector.h"
namespace blink {
void FontFallbackMap::Trace(Visitor* visitor) const {
visitor->Trace(font_selector_);
FontCacheClient::Trace(visitor);
FontSelectorClient::Trace(visitor);
}
FontFallbackMap::~FontFallbackMap() {
InvalidateAll();
}
scoped_refptr<FontFallbackList> FontFallbackMap::Get(
const FontDescription& font_description) {
auto iter = fallback_list_for_description_.find(font_description);
if (iter != fallback_list_for_description_.end()) {
DCHECK(iter->value->IsValid());
return iter->value;
}
auto add_result = fallback_list_for_description_.insert(
font_description, FontFallbackList::Create(font_selector_));
return add_result.stored_value->value;
}
void FontFallbackMap::Remove(const FontDescription& font_description) {
auto iter = fallback_list_for_description_.find(font_description);
DCHECK_NE(iter, fallback_list_for_description_.end());
DCHECK(iter->value->IsValid());
DCHECK(iter->value->HasOneRef());
fallback_list_for_description_.erase(iter);
}
void FontFallbackMap::InvalidateAll() {
for (auto& entry : fallback_list_for_description_)
entry.value->MarkInvalid();
fallback_list_for_description_.clear();
}
template <typename Predicate>
void FontFallbackMap::InvalidateInternal(Predicate predicate) {
Vector<FontDescription> invalidated;
for (auto& entry : fallback_list_for_description_) {
if (predicate(*entry.value)) {
invalidated.push_back(entry.key);
entry.value->MarkInvalid();
}
}
fallback_list_for_description_.RemoveAll(invalidated);
}
void FontFallbackMap::FontsNeedUpdate(FontSelector*,
FontInvalidationReason reason) {
switch (reason) {
case FontInvalidationReason::kFontFaceLoaded:
InvalidateInternal([](const FontFallbackList& fallback_list) {
return fallback_list.HasLoadingFallback();
});
break;
case FontInvalidationReason::kFontFaceDeleted:
InvalidateInternal([](const FontFallbackList& fallback_list) {
return fallback_list.HasCustomFont();
});
break;
default:
InvalidateAll();
}
}
void FontFallbackMap::FontCacheInvalidated() {
InvalidateAll();
}
} // namespace blink
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