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// Copyright 2016 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_MEDIA_WEBRTC_DESKTOP_MEDIA_LIST_BASE_H_
#define CHROME_BROWSER_MEDIA_WEBRTC_DESKTOP_MEDIA_LIST_BASE_H_
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "chrome/browser/media/webrtc/desktop_media_list.h"
#include "chrome/browser/media/webrtc/desktop_media_list_observer.h"
#include "content/public/browser/desktop_media_id.h"
#include "ui/gfx/geometry/size.h"
namespace gfx {
class Image;
}
// Thumbnail size is 100*100 pixels
inline constexpr gfx::Size kDefaultThumbnailSize = {100, 100};
// Base class for DesktopMediaList implementations. Implements logic shared
// between implementations. Specifically it's responsible for keeping current
// list of sources and calling the observer when the list changes.
//
// TODO(crbug.com/40637301): Consider renaming this class.
class DesktopMediaListBase : public DesktopMediaList {
public:
explicit DesktopMediaListBase(base::TimeDelta update_period);
DesktopMediaListBase(const DesktopMediaListBase&) = delete;
DesktopMediaListBase& operator=(const DesktopMediaListBase&) = delete;
~DesktopMediaListBase() override;
// DesktopMediaList interface.
void SetUpdatePeriod(base::TimeDelta period) override;
void SetThumbnailSize(const gfx::Size& thumbnail_size) override;
void SetViewDialogWindowId(content::DesktopMediaID dialog_id) override;
void StartUpdating(DesktopMediaListObserver* observer) override;
void Update(UpdateCallback callback) override;
int GetSourceCount() const override;
const Source& GetSource(int index) const override;
DesktopMediaList::Type GetMediaListType() const override;
bool IsSourceListDelegated() const override;
void ClearDelegatedSourceListSelection() override;
void FocusList() override;
void HideList() override;
void ShowDelegatedList() override;
static uint32_t GetImageHash(const gfx::Image& image);
protected:
using RefreshCallback = UpdateCallback;
struct SourceDescription {
SourceDescription(content::DesktopMediaID id, const std::u16string& name);
content::DesktopMediaID id;
std::u16string name;
};
DesktopMediaListBase(base::TimeDelta update_period,
DesktopMediaListObserver* observer);
// Called to allow a capturer with a delegated source list to be started only
// once the list actually starts updating. Otherwise, child classes are
// responsible for ensuring their capturer is started at a reasonable time.
// Only called if IsSourceListDelegated() returns true.
virtual void StartDelegatedCapturer() {}
// Before this method is called, |refresh_callback_| must be non-null, and
// after it completes (usually asychnonrously), |refresh_callback_| must be
// null. Since |refresh_callback_| is private, subclasses can check this
// condition by calling can_refresh().
virtual void Refresh(bool update_thumnails) = 0;
// Update source media list to observer.
void UpdateSourcesList(const std::vector<SourceDescription>& new_sources);
// Update a thumbnail to observer.
void UpdateSourceThumbnail(const content::DesktopMediaID& id,
const gfx::ImageSkia& image);
void UpdateSourcePreview(const content::DesktopMediaID& id,
const gfx::ImageSkia& image);
// Called when a refresh is complete. Invokes |refresh_callback_| unless it
// is null. Postcondition: |refresh_callback_| is null.
void OnRefreshComplete();
void OnDelegatedSourceListSelection();
void OnDelegatedSourceListDismissed();
bool can_refresh() const { return !refresh_callback_.is_null(); }
void SetPreviewedSource(
const std::optional<content::DesktopMediaID>& id) override {}
// Size of thumbnails generated by the model.
gfx::Size thumbnail_size_ = kDefaultThumbnailSize;
// ID of the hosting dialog.
content::DesktopMediaID view_dialog_id_ =
content::DesktopMediaID(content::DesktopMediaID::TYPE_NONE, -1);
// Desktop media type of the list.
DesktopMediaList::Type type_ = DesktopMediaList::Type::kNone;
private:
// Post a task for next list update.
void ScheduleNextRefresh();
// Time interval between mode updates.
base::TimeDelta update_period_;
// Current list of sources.
std::vector<Source> sources_;
// The observer passed to StartUpdating().
raw_ptr<DesktopMediaListObserver> observer_ = nullptr;
// Called when a refresh operation completes.
RefreshCallback refresh_callback_;
base::WeakPtrFactory<DesktopMediaListBase> weak_factory_{this};
};
#endif // CHROME_BROWSER_MEDIA_WEBRTC_DESKTOP_MEDIA_LIST_BASE_H_
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