mirror of
https://github.com/mozilla/gecko-dev.git
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325 lines
9.2 KiB
C++
325 lines
9.2 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Doug Turner <dougt@dougt.org>
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* Portions created by the Initial Developer are Copyright (C) 2009
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsDeviceMotion.h"
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#include "nsAutoPtr.h"
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#include "nsIDOMEvent.h"
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#include "nsIDOMWindow.h"
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#include "nsPIDOMWindow.h"
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#include "nsIDOMDocument.h"
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#include "nsIDOMEventTarget.h"
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#include "nsIServiceManager.h"
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#include "nsIPrivateDOMEvent.h"
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#include "nsIDOMDeviceOrientationEvent.h"
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#include "nsIDOMDeviceMotionEvent.h"
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#include "nsIServiceManager.h"
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#include "nsIPrefService.h"
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#include "nsDOMDeviceMotionEvent.h"
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static const nsTArray<nsIDOMWindow*>::index_type NoIndex =
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nsTArray<nsIDOMWindow*>::NoIndex;
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class nsDeviceMotionData : public nsIDeviceMotionData
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIDEVICEMOTIONDATA
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nsDeviceMotionData(unsigned long type, double x, double y, double z);
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private:
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~nsDeviceMotionData();
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protected:
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unsigned long mType;
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double mX, mY, mZ;
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};
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nsDeviceMotionData::nsDeviceMotionData(unsigned long type, double x, double y, double z)
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: mType(type), mX(x), mY(y), mZ(z)
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{
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}
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NS_INTERFACE_MAP_BEGIN(nsDeviceMotionData)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDeviceMotionData)
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NS_INTERFACE_MAP_END
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NS_IMPL_ADDREF(nsDeviceMotionData)
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NS_IMPL_RELEASE(nsDeviceMotionData)
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nsDeviceMotionData::~nsDeviceMotionData()
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{
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}
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NS_IMETHODIMP nsDeviceMotionData::GetType(PRUint32 *aType)
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{
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NS_ENSURE_ARG_POINTER(aType);
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*aType = mType;
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return NS_OK;
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}
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NS_IMETHODIMP nsDeviceMotionData::GetX(double *aX)
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{
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NS_ENSURE_ARG_POINTER(aX);
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*aX = mX;
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return NS_OK;
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}
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NS_IMETHODIMP nsDeviceMotionData::GetY(double *aY)
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{
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NS_ENSURE_ARG_POINTER(aY);
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*aY = mY;
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return NS_OK;
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}
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NS_IMETHODIMP nsDeviceMotionData::GetZ(double *aZ)
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{
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NS_ENSURE_ARG_POINTER(aZ);
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*aZ = mZ;
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return NS_OK;
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}
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NS_IMPL_ISUPPORTS2(nsDeviceMotion, nsIDeviceMotion, nsIDeviceMotionUpdate)
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nsDeviceMotion::nsDeviceMotion()
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: mStarted(false),
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mUpdateInterval(50), /* default to 50 ms */
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mEnabled(true)
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{
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nsCOMPtr<nsIPrefBranch> prefSrv = do_GetService(NS_PREFSERVICE_CONTRACTID);
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if (prefSrv) {
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PRInt32 value;
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nsresult rv = prefSrv->GetIntPref("device.motion.update.interval", &value);
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if (NS_SUCCEEDED(rv))
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mUpdateInterval = value;
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bool bvalue;
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rv = prefSrv->GetBoolPref("device.motion.enabled", &bvalue);
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if (NS_SUCCEEDED(rv) && bvalue == false)
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mEnabled = false;
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}
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}
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nsDeviceMotion::~nsDeviceMotion()
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{
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if (mTimeoutTimer)
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mTimeoutTimer->Cancel();
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}
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void
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nsDeviceMotion::StartDisconnectTimer()
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{
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if (mTimeoutTimer)
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mTimeoutTimer->Cancel();
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mTimeoutTimer = do_CreateInstance("@mozilla.org/timer;1");
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if (mTimeoutTimer)
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mTimeoutTimer->InitWithFuncCallback(TimeoutHandler,
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this,
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2000,
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nsITimer::TYPE_ONE_SHOT);
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}
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void
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nsDeviceMotion::TimeoutHandler(nsITimer *aTimer, void *aClosure)
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{
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// the reason that we use self, instead of just using nsITimerCallback or nsIObserver
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// is so that subclasses are free to use timers without worry about the base classes's
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// usage.
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nsDeviceMotion *self = reinterpret_cast<nsDeviceMotion *>(aClosure);
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if (!self) {
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NS_ERROR("no self");
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return;
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}
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// what about listeners that don't clean up properly? they will leak
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if (self->mListeners.Count() == 0 && self->mWindowListeners.Length() == 0) {
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self->Shutdown();
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self->mStarted = false;
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}
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}
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NS_IMETHODIMP nsDeviceMotion::AddListener(nsIDeviceMotionListener *aListener)
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{
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if (mListeners.IndexOf(aListener) != -1)
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return NS_OK; // already exists
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if (mStarted == false) {
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mStarted = true;
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Startup();
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}
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mListeners.AppendObject(aListener);
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return NS_OK;
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}
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NS_IMETHODIMP nsDeviceMotion::RemoveListener(nsIDeviceMotionListener *aListener)
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{
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if (mListeners.IndexOf(aListener) == -1)
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return NS_OK; // doesn't exist
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mListeners.RemoveObject(aListener);
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StartDisconnectTimer();
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return NS_OK;
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}
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NS_IMETHODIMP nsDeviceMotion::AddWindowListener(nsIDOMWindow *aWindow)
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{
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if (mStarted == false) {
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mStarted = true;
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Startup();
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}
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if (mWindowListeners.IndexOf(aWindow) == NoIndex)
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mWindowListeners.AppendElement(aWindow);
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return NS_OK;
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}
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NS_IMETHODIMP nsDeviceMotion::RemoveWindowListener(nsIDOMWindow *aWindow)
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{
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if (mWindowListeners.IndexOf(aWindow) == NoIndex)
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return NS_OK;
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mWindowListeners.RemoveElement(aWindow);
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StartDisconnectTimer();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDeviceMotion::DeviceMotionChanged(PRUint32 type, double x, double y, double z)
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{
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if (!mEnabled)
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return NS_ERROR_NOT_INITIALIZED;
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for (PRUint32 i = mListeners.Count(); i > 0 ; ) {
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--i;
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nsRefPtr<nsDeviceMotionData> a = new nsDeviceMotionData(type, x, y, z);
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mListeners[i]->OnMotionChange(a);
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}
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for (PRUint32 i = mWindowListeners.Length(); i > 0 ; ) {
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--i;
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// check to see if this window is in the background. if
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// it is, don't send any device motion to it.
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nsCOMPtr<nsPIDOMWindow> pwindow = do_QueryInterface(mWindowListeners[i]);
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if (!pwindow ||
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!pwindow->GetOuterWindow() ||
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pwindow->GetOuterWindow()->IsBackground())
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continue;
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nsCOMPtr<nsIDOMDocument> domdoc;
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mWindowListeners[i]->GetDocument(getter_AddRefs(domdoc));
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if (domdoc) {
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nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(mWindowListeners[i]);
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if (type == nsIDeviceMotionData::TYPE_ACCELERATION)
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FireDOMMotionEvent(domdoc, target, x, y, z);
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else if (type == nsIDeviceMotionData::TYPE_ORIENTATION)
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FireDOMOrientationEvent(domdoc, target, x, y, z);
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}
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}
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return NS_OK;
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}
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void
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nsDeviceMotion::FireDOMOrientationEvent(nsIDOMDocument *domdoc,
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nsIDOMEventTarget *target,
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double alpha,
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double beta,
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double gamma)
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{
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nsCOMPtr<nsIDOMEvent> event;
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bool defaultActionEnabled = true;
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domdoc->CreateEvent(NS_LITERAL_STRING("DeviceOrientationEvent"), getter_AddRefs(event));
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nsCOMPtr<nsIDOMDeviceOrientationEvent> oe = do_QueryInterface(event);
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if (!oe) {
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return;
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}
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oe->InitDeviceOrientationEvent(NS_LITERAL_STRING("deviceorientation"),
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true,
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false,
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alpha,
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beta,
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gamma,
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true);
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nsCOMPtr<nsIPrivateDOMEvent> privateEvent = do_QueryInterface(event);
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if (privateEvent)
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privateEvent->SetTrusted(true);
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target->DispatchEvent(event, &defaultActionEnabled);
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}
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void
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nsDeviceMotion::FireDOMMotionEvent(nsIDOMDocument *domdoc,
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nsIDOMEventTarget *target,
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double x,
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double y,
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double z) {
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nsCOMPtr<nsIDOMEvent> event;
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bool defaultActionEnabled = true;
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domdoc->CreateEvent(NS_LITERAL_STRING("DeviceMotionEvent"), getter_AddRefs(event));
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nsCOMPtr<nsIDOMDeviceMotionEvent> me = do_QueryInterface(event);
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if (!me) {
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return;
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}
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// Currently acceleration as determined includes gravity.
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nsRefPtr<nsDOMDeviceAcceleration> acceleration = new nsDOMDeviceAcceleration(x, y, z);
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me->InitDeviceMotionEvent(NS_LITERAL_STRING("devicemotion"),
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true,
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false,
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nsnull,
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acceleration,
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nsnull,
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0);
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nsCOMPtr<nsIPrivateDOMEvent> privateEvent = do_QueryInterface(event);
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if (privateEvent)
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privateEvent->SetTrusted(true);
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target->DispatchEvent(event, &defaultActionEnabled);
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}
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