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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/glic/browser_ui/glic_vector_icon_manager.h"
#include "base/logging.h"
#include "base/no_destructor.h"
#include "chrome/browser/glic/resources/glic_resources.h"
#include "content/public/browser/browser_thread.h"
#include "third_party/abseil-cpp/absl/container/flat_hash_map.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/vector_icon_utils.h"
namespace glic {
class VectorIconData {
public:
explicit VectorIconData(
std::vector<std::vector<gfx::PathElement>> path_elements)
: path_elements_(std::move(path_elements)) {
reps_size_ = path_elements_.size();
reps_ = std::make_unique<gfx::VectorIconRep[]>(reps_size_);
for (size_t i = 0; i < reps_size_; ++i) {
reps_[i] = gfx::VectorIconRep{path_elements_[i]};
}
icon_ = std::make_unique<gfx::VectorIcon>(reps_.get(), reps_size_, "");
}
VectorIconData& operator=(const VectorIconData&) = delete;
VectorIconData(const VectorIconData&) = delete;
const gfx::VectorIcon& Icon() const { return *icon_; }
private:
// Keep these as members to ensure that the vended icons (and related
// machinery) remain valid, since they do not own the data to which they
// refer.
std::vector<std::vector<gfx::PathElement>> path_elements_;
std::unique_ptr<gfx::VectorIconRep[]> reps_;
size_t reps_size_;
std::unique_ptr<gfx::VectorIcon> icon_;
};
// static
const gfx::VectorIcon& GlicVectorIconManager::GetVectorIcon(int id) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
id = GetResourceID(id);
// Ensure that the storage backing the vector icon persists so that the
// vended gfx::VectorIcon references will remain valid.
static base::NoDestructor<
absl::flat_hash_map<int, std::unique_ptr<VectorIconData>>>
icon_data;
auto it = icon_data->find(id);
if (it != icon_data->end()) {
return it->second->Icon();
}
std::vector<std::vector<gfx::PathElement>> path_elements;
gfx::ParsePathElements(
ui::ResourceBundle::GetSharedInstance().LoadDataResourceString(id),
path_elements);
auto data = std::make_unique<VectorIconData>(std::move(path_elements));
CHECK(icon_data->emplace(id, std::move(data)).second);
return GetVectorIcon(id);
}
} // namespace glic
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