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// Copyright 2013 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 "ui/views/win/appbar.h"
#include <shellapi.h>
#include "base/auto_reset.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/threading/worker_pool.h"
#include "base/win/scoped_com_initializer.h"
#include "ui/views/widget/monitor_win.h"
namespace views {
namespace {
void GetEdgesOnWorkerThread(HMONITOR monitor, int* edge) {
base::win::ScopedCOMInitializer com_initializer;
*edge = 0;
if (GetTopmostAutoHideTaskbarForEdge(ABE_LEFT, monitor))
*edge = Appbar::EDGE_LEFT;
if (GetTopmostAutoHideTaskbarForEdge(ABE_TOP, monitor))
*edge = Appbar::EDGE_TOP;
if (GetTopmostAutoHideTaskbarForEdge(ABE_RIGHT, monitor))
*edge = Appbar::EDGE_RIGHT;
if (GetTopmostAutoHideTaskbarForEdge(ABE_BOTTOM, monitor))
*edge = Appbar::EDGE_BOTTOM;
}
}
// static
Appbar* Appbar::instance() {
static Appbar* appbar = NULL;
if (!appbar)
appbar = new Appbar();
return appbar;
}
int Appbar::GetAutohideEdges(HMONITOR monitor, const base::Closure& callback) {
if (!in_callback_) {
int* edge = new int;
base::WorkerPool::PostTaskAndReply(
FROM_HERE,
base::Bind(&GetEdgesOnWorkerThread,
monitor,
base::Unretained(edge)),
base::Bind(&Appbar::OnGotEdges,
weak_factory_.GetWeakPtr(),
callback,
monitor,
edge_map_[monitor],
base::Owned(edge)),
false);
}
return edge_map_[monitor];
}
Appbar::Appbar() : weak_factory_(this), in_callback_(false) {
}
Appbar::~Appbar() {
}
void Appbar::OnGotEdges(const base::Closure& callback,
HMONITOR monitor,
int returned_edges,
int* edges) {
edge_map_[monitor] = *edges;
if (returned_edges == *edges)
return;
base::AutoReset<bool> in_callback_setter(&in_callback_, true);
callback.Run();
}
} // namespace views
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