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// Copyright 2016 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 "ash/system/toast/toast_manager.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/thread_task_runner_handle.h"
namespace ash {
namespace {
// Minimum duration for a toast to be visible (in millisecond).
uint64_t kMinimumDurationMs = 200;
} // anonymous namespace
ToastManager::ToastManager() : weak_ptr_factory_(this) {}
ToastManager::~ToastManager() {}
void ToastManager::Show(const std::string& text, uint64_t duration_ms) {
queue_.emplace(std::make_pair(text, duration_ms));
if (queue_.size() == 1 && overlay_ == nullptr)
ShowLatest();
}
void ToastManager::OnClosed() {
overlay_.reset();
// Show the next toast if available.
if (queue_.size() != 0)
ShowLatest();
}
void ToastManager::ShowLatest() {
DCHECK(!overlay_);
auto data = queue_.front();
uint64_t duration_ms = std::max(data.second, kMinimumDurationMs);
toast_id_++;
overlay_.reset(new ToastOverlay(this, data.first /* text */));
overlay_->Show(true);
base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
FROM_HERE, base::Bind(&ToastManager::OnDurationPassed,
weak_ptr_factory_.GetWeakPtr(), toast_id_),
base::TimeDelta::FromMilliseconds(duration_ms));
queue_.pop();
}
void ToastManager::OnDurationPassed(int toast_id) {
if (overlay_ && toast_id_ == toast_id)
overlay_->Show(false);
}
} // namespace ash
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