| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "components/offline_pages/core/background_snapshot_controller.h" |
| |
| #include "base/bind.h" |
| #include "base/location.h" |
| #include "base/logging.h" |
| #include "base/time/time.h" |
| #include "components/offline_pages/core/offline_page_feature.h" |
| |
| namespace { |
| // Default delay, in milliseconds, between the main document OnLoad event and |
| // snapshot. |
| const int64_t kDelayAfterDocumentOnLoadCompletedMsBackground = 2000; |
| |
| // Default delay, in milliseconds, between renovations finishing and |
| // taking a snapshot. Allows for page to update in response to the |
| // renovations. |
| const int64_t kDelayAfterRenovationsCompletedMs = 2000; |
| |
| // Delay for testing to keep polling times reasonable. |
| const int64_t kDelayForTests = 0; |
| |
| } // namespace |
| |
| namespace offline_pages { |
| |
| BackgroundSnapshotController::BackgroundSnapshotController( |
| const scoped_refptr<base::SingleThreadTaskRunner>& task_runner, |
| BackgroundSnapshotController::Client* client, |
| bool renovations_enabled) |
| : task_runner_(task_runner), |
| client_(client), |
| state_(State::READY), |
| delay_after_document_on_load_completed_ms_( |
| kDelayAfterDocumentOnLoadCompletedMsBackground), |
| delay_after_renovations_completed_ms_(kDelayAfterRenovationsCompletedMs), |
| renovations_enabled_(renovations_enabled) { |
| if (offline_pages::ShouldUseTestingSnapshotDelay()) { |
| delay_after_document_on_load_completed_ms_ = kDelayForTests; |
| delay_after_renovations_completed_ms_ = kDelayForTests; |
| } |
| } |
| |
| BackgroundSnapshotController::~BackgroundSnapshotController() {} |
| |
| void BackgroundSnapshotController::Reset() { |
| // Cancel potentially delayed tasks that relate to the previous 'session'. |
| weak_ptr_factory_.InvalidateWeakPtrs(); |
| state_ = State::READY; |
| } |
| |
| void BackgroundSnapshotController::Stop() { |
| state_ = State::STOPPED; |
| } |
| |
| void BackgroundSnapshotController::RenovationsCompleted() { |
| if (renovations_enabled_) { |
| task_runner_->PostDelayedTask( |
| FROM_HERE, |
| base::BindOnce( |
| &BackgroundSnapshotController::MaybeStartSnapshotThenStop, |
| weak_ptr_factory_.GetWeakPtr()), |
| base::TimeDelta::FromMilliseconds( |
| delay_after_renovations_completed_ms_)); |
| } |
| } |
| |
| void BackgroundSnapshotController::DocumentOnLoadCompletedInMainFrame() { |
| if (renovations_enabled_) { |
| // Run renovations. After renovations complete, a snapshot will be |
| // triggered after a delay. |
| client_->RunRenovations(); |
| } else { |
| // Post a delayed task to snapshot and then stop this controller. |
| task_runner_->PostDelayedTask( |
| FROM_HERE, |
| base::BindOnce( |
| &BackgroundSnapshotController::MaybeStartSnapshotThenStop, |
| weak_ptr_factory_.GetWeakPtr()), |
| base::TimeDelta::FromMilliseconds( |
| delay_after_document_on_load_completed_ms_)); |
| } |
| } |
| |
| void BackgroundSnapshotController::MaybeStartSnapshot() { |
| if (state_ != State::READY) |
| return; |
| state_ = State::SNAPSHOT_PENDING; |
| client_->StartSnapshot(); |
| } |
| |
| void BackgroundSnapshotController::MaybeStartSnapshotThenStop() { |
| MaybeStartSnapshot(); |
| Stop(); |
| } |
| |
| int64_t |
| BackgroundSnapshotController::GetDelayAfterDocumentOnLoadCompletedForTest() { |
| return delay_after_document_on_load_completed_ms_; |
| } |
| |
| int64_t |
| BackgroundSnapshotController::GetDelayAfterRenovationsCompletedForTest() { |
| return delay_after_renovations_completed_ms_; |
| } |
| |
| } // namespace offline_pages |