blob: 082e2f26f68441cfcbf74aae1ed6d0060cde1096 [file] [log] [blame]
/*
* Copyright 2015 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "cobalt/dom/font_face.h"
#include <cmath>
#include <limits>
namespace cobalt {
namespace dom {
void FontFaceStyleSet::AddEntry(const FontFaceStyleSet::Entry& entry) {
entries_.push_back(entry);
}
void FontFaceStyleSet::CollectUrlSources(std::set<GURL>* urls) const {
for (Entries::const_iterator entry_iterator = entries_.begin();
entry_iterator != entries_.end(); ++entry_iterator) {
const FontFaceSources& entry_sources = entry_iterator->sources;
for (FontFaceSources::const_iterator source_iterator =
entry_sources.begin();
source_iterator != entry_sources.end(); ++source_iterator) {
if (source_iterator->IsUrlSource()) {
urls->insert(source_iterator->GetUrl());
}
}
}
}
const FontFaceStyleSet::Entry* FontFaceStyleSet::MatchStyle(
const render_tree::FontStyle& pattern) const {
return entries_.empty() ? NULL
: &entries_[GetClosestStyleEntryIndex(pattern)];
}
size_t FontFaceStyleSet::GetClosestStyleEntryIndex(
const render_tree::FontStyle& pattern) const {
size_t closest_index = 0;
int min_score = std::numeric_limits<int>::max();
for (size_t i = 0; i < entries_.size(); ++i) {
int score = MatchScore(pattern, entries_[i].style);
if (score < min_score) {
closest_index = i;
min_score = score;
}
}
return closest_index;
}
int FontFaceStyleSet::MatchScore(
const render_tree::FontStyle& pattern,
const render_tree::FontStyle& candidate) const {
int score = 0;
score += (pattern.slant == candidate.slant) ? 0 : 1000;
score += std::abs(pattern.weight - candidate.weight);
return score;
}
} // namespace dom
} // namespace cobalt