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// Copyright 2023 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/preloading/preview/preview_manager.h"
#include "base/functional/bind.h"
#include "base/task/sequenced_task_runner.h"
#include "chrome/browser/preloading/preview/preview_tab.h"
#include "content/public/browser/preview_cancel_reason.h"
#include "content/public/browser/web_contents.h"
#include "url/gurl.h"
PreviewManager::PreviewManager(content::WebContents* web_contents)
: content::WebContentsObserver(web_contents),
content::WebContentsUserData<PreviewManager>(*web_contents) {}
PreviewManager::~PreviewManager() = default;
void PreviewManager::PrimaryPageChanged(content::Page& page) {
// When initiator page has gone, cancel preview.
tab_.reset();
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(
[](base::WeakPtr<PreviewManager> self) {
// Reset `usage_` asynchronously as other observers will
// still refer the usage on the page change.
if (self) {
self->usage_ = Usage::kNotUsed;
}
},
weak_factory_.GetWeakPtr()));
}
void PreviewManager::InitiatePreview(const GURL& url) {
if (usage_ == Usage::kNotUsed) {
// Upgrade to kUsedButNotPromoted iff this is the first time to initiate
// the feature.
usage_ = Usage::kUsedButNotPromoted;
}
// TODO(b:292184832): Pass more load params.
tab_ = std::make_unique<PreviewTab>(this, GetWebContents(), url);
}
void PreviewManager::Cancel(content::PreviewCancelReason reason) {
if (!tab_) {
return;
}
tab_->CancelPreview(std::move(reason));
// Delete `tab_` asynchronously so that we can call this inside PreviewTab.
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::DoNothingWithBoundArgs(std::move(tab_)));
}
void PreviewManager::PromoteToNewTab() {
if (!tab_) {
return;
}
// Upgrade to kUsedAndPromoted. This will be asynchronously reset to kNotUsed
// when the primary page is changed to the next page.
usage_ = Usage::kUsedAndPromoted;
tab_->PromoteToNewTab(GetWebContents());
// Delete `tab_` asynchronously so that we can call this inside PreviewTab.
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::DoNothingWithBoundArgs(std::move(tab_)));
}
base::WeakPtr<content::WebContents>
PreviewManager::GetWebContentsForPreviewTab() {
CHECK(tab_);
return tab_->GetWebContents();
}
void PreviewManager::CloseForTesting() {
CHECK(tab_);
tab_.reset();
}
PreviewZoomController* PreviewManager::PreviewZoomControllerForTesting() const {
return tab_->preview_zoom_controller();
}
WEB_CONTENTS_USER_DATA_KEY_IMPL(PreviewManager);
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