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// Copyright (c) 2012 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 "remoting/host/local_input_monitor.h"
#import <AppKit/AppKit.h>
#include <set>
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/mac/scoped_cftyperef.h"
#include "base/memory/ref_counted.h"
#include "base/synchronization/lock.h"
#include "remoting/host/mouse_move_observer.h"
#include "third_party/skia/include/core/SkPoint.h"
#import "third_party/GTM/AppKit/GTMCarbonEvent.h"
// Esc Key Code is 53.
// http://boredzo.org/blog/wp-content/uploads/2007/05/IMTx-virtual-keycodes.pdf
static const NSUInteger kEscKeyCode = 53;
namespace remoting {
namespace {
class LocalInputMonitorMac : public LocalInputMonitor {
public:
LocalInputMonitorMac() : mouse_move_observer_(NULL) {}
virtual ~LocalInputMonitorMac();
virtual void Start(MouseMoveObserver* mouse_move_observer,
const base::Closure& disconnect_callback) OVERRIDE;
virtual void Stop() OVERRIDE;
void OnLocalMouseMoved(const SkIPoint& new_pos);
void OnDisconnectShortcut();
private:
MouseMoveObserver* mouse_move_observer_;
base::Closure disconnect_callback_;
DISALLOW_COPY_AND_ASSIGN(LocalInputMonitorMac);
};
typedef std::set<remoting::LocalInputMonitorMac*> LocalInputMonitors;
} // namespace
} // namespace remoting
@interface LocalInputMonitorManager : NSObject {
@private
GTMCarbonHotKey* hotKey_;
CFRunLoopSourceRef mouseRunLoopSource_;
base::mac::ScopedCFTypeRef<CFMachPortRef> mouseMachPort_;
base::Lock lock_;
remoting::LocalInputMonitors monitors_;
}
// Called when the hotKey is hit.
- (void)hotKeyHit:(GTMCarbonHotKey*)hotKey;
// Called when the local mouse moves
- (void)localMouseMoved:(const SkIPoint&)mousePos;
// Must be called when the LocalInputMonitorManager is no longer to be used.
// Similar to NSTimer in that more than a simple release is required.
- (void)invalidate;
// Called to add a monitor.
- (void)addMonitor:(remoting::LocalInputMonitorMac*)monitor;
// Called to remove a monitor. Returns true if it was the last
// monitor, in which case the object should be destroyed.
- (bool)removeMonitor:(remoting::LocalInputMonitorMac*)monitor;
@end
static CGEventRef LocalMouseMoved(CGEventTapProxy proxy, CGEventType type,
CGEventRef event, void* context) {
int64_t pid = CGEventGetIntegerValueField(event, kCGEventSourceUnixProcessID);
if (pid == 0) {
CGPoint cgMousePos = CGEventGetLocation(event);
SkIPoint mousePos = SkIPoint::Make(cgMousePos.x, cgMousePos.y);
[static_cast<LocalInputMonitorManager*>(context) localMouseMoved:mousePos];
}
return NULL;
}
@implementation LocalInputMonitorManager
- (id)init {
if ((self = [super init])) {
GTMCarbonEventDispatcherHandler* handler =
[GTMCarbonEventDispatcherHandler sharedEventDispatcherHandler];
hotKey_ = [handler registerHotKey:kEscKeyCode
modifiers:(NSAlternateKeyMask | NSControlKeyMask)
target:self
action:@selector(hotKeyHit:)
userInfo:nil
whenPressed:YES];
if (!hotKey_) {
LOG(ERROR) << "registerHotKey failed.";
}
mouseMachPort_.reset(CGEventTapCreate(
kCGSessionEventTap, kCGHeadInsertEventTap, kCGEventTapOptionListenOnly,
1 << kCGEventMouseMoved, LocalMouseMoved, self));
if (mouseMachPort_) {
mouseRunLoopSource_ = CFMachPortCreateRunLoopSource(
NULL, mouseMachPort_, 0);
CFRunLoopAddSource(
CFRunLoopGetMain(), mouseRunLoopSource_, kCFRunLoopCommonModes);
} else {
LOG(ERROR) << "CGEventTapCreate failed.";
}
if (!hotKey_ && !mouseMachPort_) {
[self release];
return nil;
}
}
return self;
}
- (void)hotKeyHit:(GTMCarbonHotKey*)hotKey {
base::AutoLock lock(lock_);
for (remoting::LocalInputMonitors::const_iterator i = monitors_.begin();
i != monitors_.end(); ++i) {
(*i)->OnDisconnectShortcut();
}
}
- (void)localMouseMoved:(const SkIPoint&)mousePos {
base::AutoLock lock(lock_);
for (remoting::LocalInputMonitors::const_iterator i = monitors_.begin();
i != monitors_.end(); ++i) {
(*i)->OnLocalMouseMoved(mousePos);
}
}
- (void)invalidate {
if (hotKey_) {
GTMCarbonEventDispatcherHandler* handler =
[GTMCarbonEventDispatcherHandler sharedEventDispatcherHandler];
[handler unregisterHotKey:hotKey_];
hotKey_ = NULL;
}
if (mouseRunLoopSource_) {
CFMachPortInvalidate(mouseMachPort_);
CFRunLoopRemoveSource(
CFRunLoopGetMain(), mouseRunLoopSource_, kCFRunLoopCommonModes);
CFRelease(mouseRunLoopSource_);
mouseMachPort_.reset(0);
mouseRunLoopSource_ = NULL;
}
}
- (void)addMonitor:(remoting::LocalInputMonitorMac*)monitor {
base::AutoLock lock(lock_);
monitors_.insert(monitor);
}
- (bool)removeMonitor:(remoting::LocalInputMonitorMac*)monitor {
base::AutoLock lock(lock_);
monitors_.erase(monitor);
return monitors_.empty();
}
@end
namespace remoting {
namespace {
base::LazyInstance<base::Lock>::Leaky g_monitor_lock =
LAZY_INSTANCE_INITIALIZER;
LocalInputMonitorManager* g_local_input_monitor_manager = NULL;
LocalInputMonitorMac::~LocalInputMonitorMac() {
Stop();
}
void LocalInputMonitorMac::Start(MouseMoveObserver* mouse_move_observer,
const base::Closure& disconnect_callback) {
base::AutoLock lock(g_monitor_lock.Get());
if (!g_local_input_monitor_manager)
g_local_input_monitor_manager = [[LocalInputMonitorManager alloc] init];
CHECK(g_local_input_monitor_manager);
mouse_move_observer_ = mouse_move_observer;
disconnect_callback_ = disconnect_callback;
[g_local_input_monitor_manager addMonitor:this];
}
void LocalInputMonitorMac::Stop() {
base::AutoLock lock(g_monitor_lock.Get());
if ([g_local_input_monitor_manager removeMonitor:this]) {
[g_local_input_monitor_manager invalidate];
[g_local_input_monitor_manager release];
g_local_input_monitor_manager = nil;
}
}
void LocalInputMonitorMac::OnLocalMouseMoved(const SkIPoint& new_pos) {
mouse_move_observer_->OnLocalMouseMoved(new_pos);
}
void LocalInputMonitorMac::OnDisconnectShortcut() {
disconnect_callback_.Run();
}
} // namespace
scoped_ptr<LocalInputMonitor> LocalInputMonitor::Create() {
return scoped_ptr<LocalInputMonitor>(new LocalInputMonitorMac());
}
} // namespace remoting
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