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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_VIEW_TRANSITION_VIEW_TRANSITION_REQUEST_H_
#define CC_VIEW_TRANSITION_VIEW_TRANSITION_REQUEST_H_
#include <map>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/functional/callback.h"
#include "cc/cc_export.h"
#include "components/viz/common/quads/compositor_frame_transition_directive.h"
#include "components/viz/common/quads/compositor_render_pass.h"
#include "components/viz/common/view_transition_element_resource_id.h"
#include "third_party/blink/public/common/tokens/tokens.h"
#include "ui/gfx/display_color_spaces.h"
namespace cc {
// This class represents a view transition request. It is constructed in
// Blink with an intent of translating this request into a viz directive for the
// transition to occur.
class CC_EXPORT ViewTransitionRequest {
public:
using ViewTransitionElementMap =
std::map<viz::ViewTransitionElementResourceId,
viz::CompositorRenderPassId>;
using Type = viz::CompositorFrameTransitionDirective::Type;
using ViewTransitionContentRectMap = viz::ViewTransitionElementResourceRects;
using ViewTransitionCaptureCallback =
base::OnceCallback<void(const ViewTransitionContentRectMap&)>;
// Creates a Type::kCapture type of request.
// `transition_token` is an identifier that uniquely identifies each
// transition.
// `maybe_cross_frame_sink` is set if this transition can start and animate on
// different CompositorFrameSink instances (i.e. cross-document navigations).
static std::unique_ptr<ViewTransitionRequest> CreateCapture(
const blink::ViewTransitionToken& transition_token,
bool maybe_cross_frame_sink,
std::vector<viz::ViewTransitionElementResourceId> capture_ids,
ViewTransitionCaptureCallback commit_callback);
// Creates a Type::kAnimateRenderer type of request.
static std::unique_ptr<ViewTransitionRequest> CreateAnimateRenderer(
const blink::ViewTransitionToken& transition_token,
bool maybe_cross_frame_sink);
// Creates a Type::kRelease type of request.
static std::unique_ptr<ViewTransitionRequest> CreateRelease(
const blink::ViewTransitionToken& transition_token,
bool maybe_cross_frame_sink);
ViewTransitionRequest(ViewTransitionRequest&) = delete;
~ViewTransitionRequest();
ViewTransitionRequest& operator=(ViewTransitionRequest&) = delete;
// The callback is run when the request is sufficiently processed for us to be
// able to begin the next step in the animation. In other words, when this
// callback is invoked it can resolve a script promise that is gating this
// step.
ViewTransitionCaptureCallback TakeFinishedCallback() {
return std::move(commit_callback_);
}
// This constructs a viz directive. Note that repeated calls to this function
// would create a new sequence id for the directive, which means it would be
// processed again by viz.
viz::CompositorFrameTransitionDirective ConstructDirective(
const ViewTransitionElementMap& shared_element_render_pass_id_map,
const gfx::DisplayColorSpaces& display_color_spaces) const;
// Returns the sequence id for this request.
uint32_t sequence_id() const { return sequence_id_; }
// This is only called on the viz side where the request is constructed from
// mojo wire and the sequence id is originally created on the renderer side.
void set_sequence_id(uint32_t id) { sequence_id_ = id; }
Type type() const { return type_; }
// Testing / debugging functionality.
std::string ToString() const;
const blink::ViewTransitionToken& token() const { return transition_token_; }
bool maybe_cross_frame_sink() const { return maybe_cross_frame_sink_; }
const std::vector<viz::ViewTransitionElementResourceId>&
capture_resource_ids() const {
return capture_resource_ids_;
}
private:
ViewTransitionRequest(
Type type,
const blink::ViewTransitionToken& transition_token,
bool maybe_cross_frame_sink,
std::vector<viz::ViewTransitionElementResourceId> capture_ids,
ViewTransitionCaptureCallback commit_callback);
const Type type_;
const blink::ViewTransitionToken transition_token_;
const bool maybe_cross_frame_sink_;
ViewTransitionCaptureCallback commit_callback_;
uint32_t sequence_id_;
const std::vector<viz::ViewTransitionElementResourceId> capture_resource_ids_;
static uint32_t s_next_sequence_id_;
};
} // namespace cc
#endif // CC_VIEW_TRANSITION_VIEW_TRANSITION_REQUEST_H_
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