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// Copyright (c) 2011 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/synchronization/lock.h"
#include "remoting/host/chromoting_host.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 {
typedef std::set<remoting::ChromotingHost*> Hosts;
}
@interface LocalInputMonitorImpl : NSObject {
@private
GTMCarbonHotKey* hotKey_;
CFRunLoopSourceRef mouseRunLoopSource_;
base::Lock hostsLock_;
Hosts hosts_;
}
// 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 LocalInputMonitorImpl is no longer to be used.
// Similar to NSTimer in that more than a simple release is required.
- (void)invalidate;
// Called to add a host to the list of those to be Shutdown() when the hotkey
// is pressed.
- (void)addHost:(remoting::ChromotingHost*)host;
// Called to remove a host. Returns true if it was the last host being
// monitored, in which case the object should be destroyed.
- (bool)removeHost:(remoting::ChromotingHost*)host;
@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<LocalInputMonitorImpl*>(context) localMouseMoved:mousePos];
}
return NULL;
}
@implementation LocalInputMonitorImpl
- (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.";
}
base::mac::ScopedCFTypeRef<CFMachPortRef> mouseMachPort(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(hostsLock_);
for (Hosts::const_iterator i = hosts_.begin(); i != hosts_.end(); ++i) {
(*i)->Shutdown(base::Closure());
}
}
- (void)localMouseMoved:(const SkIPoint&)mousePos {
base::AutoLock lock(hostsLock_);
for (Hosts::const_iterator i = hosts_.begin(); i != hosts_.end(); ++i) {
(*i)->LocalMouseMoved(mousePos);
}
}
- (void)invalidate {
if (hotKey_) {
GTMCarbonEventDispatcherHandler* handler =
[GTMCarbonEventDispatcherHandler sharedEventDispatcherHandler];
[handler unregisterHotKey:hotKey_];
hotKey_ = NULL;
}
if (mouseRunLoopSource_) {
CFRunLoopRemoveSource(
CFRunLoopGetMain(), mouseRunLoopSource_, kCFRunLoopCommonModes);
CFRelease(mouseRunLoopSource_);
mouseRunLoopSource_ = NULL;
}
}
- (void)addHost:(remoting::ChromotingHost*)host {
base::AutoLock lock(hostsLock_);
hosts_.insert(host);
}
- (bool)removeHost:(remoting::ChromotingHost*)host {
base::AutoLock lock(hostsLock_);
hosts_.erase(host);
return hosts_.empty();
}
@end
namespace {
class LocalInputMonitorMac : public remoting::LocalInputMonitor {
public:
LocalInputMonitorMac() : host_(NULL) {}
virtual ~LocalInputMonitorMac();
virtual void Start(remoting::ChromotingHost* host) OVERRIDE;
virtual void Stop() OVERRIDE;
private:
remoting::ChromotingHost* host_;
DISALLOW_COPY_AND_ASSIGN(LocalInputMonitorMac);
};
base::LazyInstance<base::Lock,
base::LeakyLazyInstanceTraits<base::Lock> >
monitor_lock = LAZY_INSTANCE_INITIALIZER;
LocalInputMonitorImpl* local_input_monitor = NULL;
} // namespace
LocalInputMonitorMac::~LocalInputMonitorMac() {
Stop();
}
void LocalInputMonitorMac::Start(remoting::ChromotingHost* host) {
base::AutoLock lock(monitor_lock.Get());
if (!local_input_monitor)
local_input_monitor = [[LocalInputMonitorImpl alloc] init];
CHECK(local_input_monitor);
[local_input_monitor addHost:host];
host_ = host;
}
void LocalInputMonitorMac::Stop() {
base::AutoLock lock(monitor_lock.Get());
if ([local_input_monitor removeHost:host_]) {
[local_input_monitor invalidate];
[local_input_monitor release];
local_input_monitor = nil;
}
}
remoting::LocalInputMonitor* remoting::LocalInputMonitor::Create() {
return new LocalInputMonitorMac;
}
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