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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_VIEWS_AUTOFILL_POPUP_LAZY_LOADING_IMAGE_VIEW_H_
#define CHROME_BROWSER_UI_VIEWS_AUTOFILL_POPUP_LAZY_LOADING_IMAGE_VIEW_H_
#include "base/functional/callback_forward.h"
#include "base/task/cancelable_task_tracker.h"
#include "ui/gfx/geometry/size.h"
#include "ui/views/controls/image_view.h"
#include "ui/views/view.h"
namespace autofill {
// A wrapper for `views::ImageView` that defers loading the image content until
// the first time the view is painted and visible.
class LazyLoadingImageView : public views::View {
METADATA_HEADER(LazyLoadingImageView, views::View)
public:
using ImageLoaderOnLoadSuccess =
base::OnceCallback<void(const gfx::Image& image)>;
using ImageLoaderOnLoadFail = base::OnceCallback<void()>;
using ImageLoader = base::OnceCallback<void(base::CancelableTaskTracker*,
ImageLoaderOnLoadSuccess,
ImageLoaderOnLoadFail)>;
LazyLoadingImageView(gfx::Size size,
const ui::ImageModel& placeholder,
ImageLoader loader);
LazyLoadingImageView(const LazyLoadingImageView&) = delete;
LazyLoadingImageView& operator=(const LazyLoadingImageView&) = delete;
~LazyLoadingImageView() override;
// views::View:
void OnPaint(gfx::Canvas* canvas) override;
gfx::Image GetImageForTesting() const;
private:
void OnLoadSuccess(const gfx::Image& image);
raw_ptr<views::ImageView> image_ = nullptr;
ImageLoader loader_;
bool requested_ = false;
base::CancelableTaskTracker request_tracker_;
base::WeakPtrFactory<LazyLoadingImageView> weak_ptr_factory_{this};
};
} // namespace autofill
#endif // CHROME_BROWSER_UI_VIEWS_AUTOFILL_POPUP_LAZY_LOADING_IMAGE_VIEW_H_
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