diff options
Diffstat (limited to 'apps/system/camera/js/camera.js')
| -rw-r--r-- | apps/system/camera/js/camera.js | 982 |
1 files changed, 982 insertions, 0 deletions
diff --git a/apps/system/camera/js/camera.js b/apps/system/camera/js/camera.js new file mode 100644 index 0000000..25f12ae --- /dev/null +++ b/apps/system/camera/js/camera.js @@ -0,0 +1,982 @@ +'use strict'; + +// Utility functions +function padLeft(num, length) { + var r = String(num); + while (r.length < length) { + r = '0' + r; + } + return r; +} + + +// This handles the logic pertaining to the naming of files according +// to the Design rule for Camera File System +// * http://en.wikipedia.org/wiki/Design_rule_for_Camera_File_system +var DCFApi = (function() { + + var api = {}; + + var dcfConfigLoaded = false; + var deferredArgs = null; + var defaultSeq = {file: 1, dir: 100}; + + var dcfConfig = { + key: 'dcf_key', + seq: null, + postFix: 'MZLLA', + prefix: {video: 'VID_', image: 'IMG_'}, + ext: {video: '3gp', image: 'jpg'} + }; + + api.init = function() { + + asyncStorage.getItem(dcfConfig.key, function(value) { + + dcfConfigLoaded = true; + dcfConfig.seq = value ? value : defaultSeq; + + // We have a previous call to createDCFFilename that is waiting for + // a response, fire it again + if (deferredArgs) { + var args = deferredArgs; + api.createDCFFilename(args.storage, args.type, args.callback); + deferredArgs = null; + } + }); + }; + + api.createDCFFilename = function(storage, type, callback) { + + // We havent loaded the current counters from indexedDB yet, defer + // the call + if (!dcfConfigLoaded) { + deferredArgs = {storage: storage, type: type, callback: callback}; + return; + } + + var filepath = 'DCIM/' + dcfConfig.seq.dir + dcfConfig.postFix + '/'; + var filename = dcfConfig.prefix[type] + + padLeft(dcfConfig.seq.file, 4) + '.' + + dcfConfig.ext[type]; + + // A file with this name may have been written by the user or + // our indexeddb sequence tracker was cleared, check we wont overwrite + // anything + var req = storage.get(filepath + filename); + + // A file existed, we bump the directory then try to generate a + // new filename + req.onsuccess = function() { + dcfConfig.seq.file = 1; + dcfConfig.seq.dir += 1; + asyncStorage.setItem(dcfConfig.key, dcfConfig.seq, function() { + api.createDCFFilename(storage, type, callback); + }); + }; + + // No file existed, we are good to go + req.onerror = function() { + if (dcfConfig.seq.file < 9999) { + dcfConfig.seq.file += 1; + } else { + dcfConfig.seq.file = 1; + dcfConfig.seq.dir += 1; + } + asyncStorage.setItem(dcfConfig.key, dcfConfig.seq, function() { + callback(filepath, filename); + }); + }; + }; + + return api; + +})(); + +var Camera = { + _cameras: null, + _camera: 0, + _captureMode: null, + _recording: false, + + // In secure mode the user cannot browse to the gallery + _secureMode: window.parent !== window, + _currentOverlay: null, + + CAMERA: 'camera', + VIDEO: 'video', + + _videoTimer: null, + _videoStart: null, + _videoPath: null, + + _autoFocusSupported: 0, + _manuallyFocused: false, + + _timeoutId: 0, + _cameraObj: null, + + _photosTaken: [], + _cameraProfile: null, + + _resumeViewfinderTimer: null, + _waitingToGenerateThumb: false, + + _styleSheet: document.styleSheets[0], + _orientationRule: null, + _phoneOrientation: 0, + + _pictureStorage: null, + _videoStorage: null, + _storageState: null, + + STORAGE_INIT: 0, + STORAGE_AVAILABLE: 1, + STORAGE_NOCARD: 2, + STORAGE_UNMOUNTED: 3, + STORAGE_CAPACITY: 4, + + _pictureSize: null, + _previewPaused: false, + _previewActive: false, + + PREVIEW_PAUSE: 500, + FILMSTRIP_DURATION: 5000, // show filmstrip for 5s before fading + + _flashModes: [], + _currentFlashMode: 0, + + _config: { + fileFormat: 'jpeg' + }, + + get _previewConfig() { + delete this._previewConfig; + return this._previewConfig = { + width: document.body.clientHeight, + height: document.body.clientWidth + }; + }, + + _previewConfigVideo: { + profile: 'cif', + rotation: 0, + width: 352, + height: 288 + }, + + _shutterKey: 'camera.shutter.enabled', + _shutterSound: null, + _shutterSoundEnabled: true, + + PROMPT_DELAY: 2000, + + _watchId: null, + _position: null, + + _pendingPick: null, + + // The minimum available disk space to start recording a video. + RECORD_SPACE_MIN: 1024 * 1024 * 2, + + // Number of bytes left on disk to let us stop recording. + RECORD_SPACE_PADDING: 1024 * 1024 * 1, + + // Maximum image resolution for still photos taken with camera + MAX_IMAGE_RES: 1600 * 1200, // Just under 2 megapixels + + get overlayTitle() { + return document.getElementById('overlay-title'); + }, + + get overlayText() { + return document.getElementById('overlay-text'); + }, + + get overlay() { + return document.getElementById('overlay'); + }, + + get viewfinder() { + return document.getElementById('viewfinder'); + }, + + get switchButton() { + return document.getElementById('switch-button'); + }, + + get captureButton() { + return document.getElementById('capture-button'); + }, + + get galleryButton() { + return document.getElementById('gallery-button'); + }, + + get videoTimer() { + return document.getElementById('video-timer'); + }, + + get focusRing() { + return document.getElementById('focus-ring'); + }, + + get toggleButton() { + return document.getElementById('toggle-camera'); + }, + + get toggleFlashBtn() { + return document.getElementById('toggle-flash'); + }, + + // We have seperated init and delayedInit as we want to make sure + // that on first launch we dont interfere and load the camera + // previewStream as fast as possible, once the previewStream is + // active we do the rest of the initialisation. + init: function() { + this.setCaptureMode(this.CAMERA); + this.loadCameraPreview(this._camera, this.delayedInit.bind(this)); + }, + + delayedInit: function camera_delayedInit() { + // If we don't have any pending messages, show the usual UI + // Otherwise, determine which buttons to show once we get our + // activity message + if (!navigator.mozHasPendingMessage('activity')) { + this.galleryButton.classList.remove('hidden'); + this.switchButton.classList.remove('hidden'); + this.enableButtons(); + } + + // Dont let the phone go to sleep while the camera is + // active, user must manually close it + if (navigator.requestWakeLock) { + navigator.requestWakeLock('screen'); + } + + this.setToggleCameraStyle(); + + // We lock the screen orientation and deal with rotating + // the icons manually + var css = '#switch-button span, #capture-button span, ' + + '#gallery-button span { -moz-transform: rotate(0deg); }'; + var insertId = this._styleSheet.cssRules.length - 1; + this._orientationRule = this._styleSheet.insertRule(css, insertId); + window.addEventListener('deviceorientation', this.orientChange.bind(this)); + + this.toggleButton.addEventListener('click', this.toggleCamera.bind(this)); + this.toggleFlashBtn.addEventListener('click', this.toggleFlash.bind(this)); + this.viewfinder.addEventListener('click', this.toggleFilmStrip.bind(this)); + + this.switchButton + .addEventListener('click', this.toggleModePressed.bind(this)); + this.captureButton + .addEventListener('click', this.capturePressed.bind(this)); + this.galleryButton + .addEventListener('click', this.galleryBtnPressed.bind(this)); + + if (!navigator.mozCameras) { + this.captureButton.setAttribute('disabled', 'disabled'); + return; + } + + if (this._secureMode) { + this.galleryButton.setAttribute('disabled', 'disabled'); + } + + this._shutterSound = new Audio('./resources/sounds/shutter.ogg'); + this._shutterSound.mozAudioChannelType = 'publicnotification'; + + if ('mozSettings' in navigator) { + var req = navigator.mozSettings.createLock().get(this._shutterKey); + req.onsuccess = (function onsuccess() { + this._shutterSoundEnabled = req.result[this._shutterKey]; + }).bind(this); + + navigator.mozSettings.addObserver(this._shutterKey, (function(e) { + this._shutterSoundEnabled = e.settingValue; + }).bind(this)); + } + + this._storageState = this.STORAGE_INIT; + + this._pictureStorage = navigator.getDeviceStorage('pictures'); + this._videoStorage = navigator.getDeviceStorage('videos'), + + this._pictureStorage + .addEventListener('change', this.deviceStorageChangeHandler.bind(this)); + + navigator.mozSetMessageHandler('activity', function(activity) { + var name = activity.source.name; + if (name === 'pick') { + Camera.initPick(activity); + } + else { + // We got another activity. Perhaps we were launched from gallery + // So show our usual buttons + Camera.galleryButton.classList.remove('hidden'); + Camera.switchButton.classList.remove('hidden'); + } + Camera.enableButtons(); + }); + + DCFApi.init(); + }, + + enableButtons: function camera_enableButtons() { + if (!this._pendingPick) { + this.switchButton.removeAttribute('disabled'); + } + this.captureButton.removeAttribute('disabled'); + }, + + disableButtons: function camera_disableButtons() { + this.switchButton.setAttribute('disabled', 'disabled'); + this.captureButton.setAttribute('disabled', 'disabled'); + }, + + // When inside an activity the user cannot switch between + // the gallery or video recording. + initPick: function camera_initPick(activity) { + this._pendingPick = activity; + + // Hide the gallery and switch buttons, leaving only the shutter + this.galleryButton.classList.add('hidden'); + this.switchButton.classList.add('hidden'); + + // Display the cancel button and add an event listener for it + var cancelButton = document.getElementById('cancel-pick'); + cancelButton.classList.remove('hidden'); + cancelButton.onclick = this.cancelPick.bind(this); + }, + + cancelPick: function camera_cancelPick() { + if (this._pendingPick) { + this._pendingPick.postError('pick cancelled'); + } + this._pendingPick = null; + }, + + toggleModePressed: function camera_toggleCaptureMode(e) { + if (e.target.getAttribute('disabled')) { + return; + } + + var newMode = (this.captureMode === this.CAMERA) ? this.VIDEO : this.CAMERA; + this.disableButtons(); + this.setCaptureMode(newMode); + + function gotPreviewStream(stream) { + this.viewfinder.mozSrcObject = stream; + this.viewfinder.play(); + this.enableButtons(); + } + if (this.captureMode === this.CAMERA) { + this._cameraObj.getPreviewStream(this._previewConfig, + gotPreviewStream.bind(this)); + } else { + this._previewConfigVideo.rotation = this._phoneOrientation; + this._cameraObj.getPreviewStreamVideoMode(this._previewConfigVideo, + gotPreviewStream.bind(this)); + } + }, + + toggleCamera: function camera_toggleCamera() { + this._camera = 1 - this._camera; + this.loadCameraPreview(this._camera, this.enableButtons.bind(this)); + this.setToggleCameraStyle(); + }, + + setToggleCameraStyle: function camera_setToggleCameraStyle() { + var modeName = this._camera === 0 ? 'back' : 'front'; + this.toggleButton.setAttribute('data-mode', modeName); + }, + + toggleFlash: function camera_toggleFlash() { + if (this._currentFlashMode === this._flashModes.length - 1) { + this._currentFlashMode = 0; + } else { + this._currentFlashMode = this._currentFlashMode + 1; + } + this.setFlashMode(); + }, + + setFlashMode: function camera_setFlashMode() { + var flashModeName = this._flashModes[this._currentFlashMode]; + this.toggleFlashBtn.setAttribute('data-mode', flashModeName); + this._cameraObj.flashMode = flashModeName; + }, + + toggleRecording: function camera_toggleRecording() { + if (this._recording) { + this.stopRecording(); + return; + } + + this.startRecording(); + }, + + startRecording: function camera_startRecording() { + var captureButton = this.captureButton; + var switchButton = this.switchButton; + + var onerror = function() { + handleError('error-recording'); + } + var onsuccess = (function onsuccess() { + document.body.classList.add('capturing'); + captureButton.removeAttribute('disabled'); + this._recording = true; + this.startRecordingTimer(); + + // Hide the filmstrip to prevent the users from + // entering the preview mode after Camera starts recording + if (Filmstrip.isShown()) + Filmstrip.hide(); + + // User closed app while recording was trying to start + if (document.mozHidden) { + this.stopRecording(); + } + }).bind(this); + + var handleError = (function handleError(id) { + this.enableButtons(); + alert(navigator.mozL10n.get(id + '-title') + '. ' + + navigator.mozL10n.get(id + '-text')); + }).bind(this); + + this.disableButtons(); + + var startRecording = (function startRecording(freeBytes) { + if (freeBytes < this.RECORD_SPACE_MIN) { + handleError('nospace'); + return; + } + + var config = { + rotation: this._phoneOrientation, + maxFileSizeBytes: freeBytes - this.RECORD_SPACE_PADDING + }; + this._cameraObj.startRecording(config, + this._videoStorage, this._videoPath, + onsuccess, onerror); + }).bind(this); + + DCFApi.createDCFFilename(this._videoStorage, 'video', (function(path, name) { + this._videoPath = path + name; + + // The CameraControl API will not automatically create directories + // for the new file if they do not exist, so write a dummy file + // to the same directory via DeviceStorage to ensure that the directory + // exists before recording starts. + var dummyblob = new Blob([''], {type: 'video/3gpp'}); + var dummyfilename = path + '.' + name; + var req = this._videoStorage.addNamed(dummyblob, dummyfilename); + req.onerror = onerror; + req.onsuccess = (function fileCreated() { + this._videoStorage.delete(dummyfilename); // No need to wait for success + // Determine the number of bytes available on disk. + var spaceReq = this._videoStorage.freeSpace(); + spaceReq.onerror = onerror; + spaceReq.onsuccess = function() { + startRecording(spaceReq.result); + } + }).bind(this); + }).bind(this)); + }, + + startRecordingTimer: function camera_startRecordingTimer() { + this._videoStart = new Date().getTime(); + this.videoTimer.textContent = this.formatTimer(0); + this._videoTimer = + window.setInterval(this.updateVideoTimer.bind(this), 1000); + }, + + updateVideoTimer: function camera_updateVideoTimer() { + var videoLength = + Math.round((new Date().getTime() - this._videoStart) / 1000); + this.videoTimer.textContent = this.formatTimer(videoLength); + }, + + stopRecording: function camera_stopRecording() { + this._cameraObj.stopRecording(); + this._recording = false; + window.clearInterval(this._videoTimer); + this.enableButtons(); + document.body.classList.remove('capturing'); + + // XXX + // I need some way to know when the camera is done writing this file + // currently I'm sending this to the filmstrip which is trying to + // determine its rotation and fails sometimes if the file is not + // yet complete. For now, I just defer for a second, but + // there ought to be a better way. + // See https://bugzilla.mozilla.org/show_bug.cgi?id=817367 + // Maybe I'll get a device storage callback... check this. + var videofile = this._videoPath; + setTimeout(function() { + Filmstrip.addVideo(videofile); + Filmstrip.show(Camera.FILMSTRIP_DURATION); + }, 1000); + }, + + formatTimer: function camera_formatTimer(time) { + var minutes = Math.floor(time / 60); + var seconds = Math.round(time % 60); + if (minutes < 60) { + return padLeft(minutes, 2) + ':' + padLeft(seconds, 2); + } + return ''; + }, + + capturePressed: function camera_doCapture(e) { + if (e.target.getAttribute('disabled')) { + return; + } + + if (this.captureMode === this.CAMERA) { + this.prepareTakePicture(); + } else { + this.toggleRecording(); + } + }, + + galleryBtnPressed: function camera_galleryBtnPressed() { + // Can't launch the gallery if the lockscreen is locked. + // The button shouldn't even be visible in this case, but + // let's be really sure here. + if (this._secureMode) + return; + + // Launch the gallery with an activity + var a = new MozActivity({ + name: 'browse', + data: { + type: 'photos' + } + }); + }, + + orientChange: function camera_orientChange(e) { + // Orientation is 0 starting at 'natural portrait' increasing + // going clockwise + var orientation = (e.beta > 45) ? 180 : + (e.beta < -45) ? 0 : + (e.gamma < -45) ? 90 : + (e.gamma > 45) ? 270 : 0; + + if (orientation !== this._phoneOrientation) { + var rule = this._styleSheet.cssRules[this._orientationRule]; + // PLEASE DO SOMETHING KITTENS ARE DYING + // Setting MozRotate to 90 or 270 causes element to disappear + rule.style.MozTransform = 'rotate(' + -(orientation + 1) + 'deg)'; + this._phoneOrientation = orientation; + + Filmstrip.setOrientation(orientation); + } + }, + + setCaptureMode: function camera_setCaptureMode(mode) { + if (this.captureMode) { + document.body.classList.remove(this.captureMode); + } + this.captureMode = mode; + document.body.classList.add(mode); + }, + + toggleFilmStrip: function camera_toggleFilmStrip(ev) { + // We will just ignore + // because the filmstrip shouldn't be shown + // while Camera is recording + if (this._recording) + return; + + if (Filmstrip.isShown()) + Filmstrip.hide(); + else + Filmstrip.show(); + }, + + loadCameraPreview: function camera_loadCameraPreview(camera, callback) { + + this.viewfinder.mozSrcObject = null; + this._timeoutId = 0; + + var viewfinder = this.viewfinder; + var style = viewfinder.style; + var width = document.body.clientHeight; + var height = document.body.clientWidth; + + style.top = ((width / 2) - (height / 2)) + 'px'; + style.left = -((width / 2) - (height / 2)) + 'px'; + + var transform = 'rotate(90deg)'; + var rotation; + if (camera == 1) { + /* backwards-facing camera */ + transform += ' scale(-1, 1)'; + rotation = 0; + } else { + /* forwards-facing camera */ + rotation = 0; + } + + style.MozTransform = transform; + style.width = width + 'px'; + style.height = height + 'px'; + + this._cameras = navigator.mozCameras.getListOfCameras(); + var options = {camera: this._cameras[this._camera]}; + + function gotPreviewScreen(stream) { + viewfinder.mozSrcObject = stream; + viewfinder.play(); + + if (callback) { + callback(); + } + + this._previewActive = true; + this.checkStorageSpace(); + setTimeout(this.initPositionUpdate.bind(this), this.PROMPT_DELAY); + } + + function gotCamera(camera) { + this._cameraObj = camera; + this._config.rotation = rotation; + this._autoFocusSupported = + camera.capabilities.focusModes.indexOf('auto') !== -1; + this._pictureSize = + this.pickPictureSize(camera.capabilities.pictureSizes); + this.enableCameraFeatures(camera.capabilities); + camera.onShutter = (function() { + if (this._shutterSoundEnabled) { + this._shutterSound.play(); + } + }).bind(this); + camera.onRecorderStateChange = this.recordingStateChanged.bind(this); + if (this.captureMode === this.CAMERA) { + camera.getPreviewStream(this._previewConfig, gotPreviewScreen.bind(this)); + } else { + this._previewConfigVideo.rotation = this._phoneOrientation; + this._cameraObj.getPreviewStreamVideoMode(this._previewConfigVideo, + gotPreviewScreen.bind(this)); + } + } + + // If there is already a camera, we would have to release it first. + if (this._cameraObj) { + this.release(function camera_release_callback() { + navigator.mozCameras.getCamera(options, gotCamera.bind(this)); + }); + } else { + navigator.mozCameras.getCamera(options, gotCamera.bind(this)); + } + }, + + recordingStateChanged: function(msg) { + if (msg === 'FileSizeLimitReached') { + this.stopRecording(); + alert(navigator.mozL10n.get('size-limit-reached')); + } + }, + + enableCameraFeatures: function camera_enableCameraFeatures(capabilities) { + if (this._cameras.length > 1) { + this.toggleButton.classList.remove('hidden'); + } else { + this.toggleButton.classList.add('hidden'); + } + + this._flashModes = capabilities.flashModes; + if (this._flashModes) { + this.setFlashMode(); + this.toggleFlashBtn.classList.remove('hidden'); + } else { + this.toggleFlashBtn.classList.add('hidden'); + } + }, + + startPreview: function camera_startPreview() { + this.viewfinder.play(); + this.loadCameraPreview(this._camera, this.enableButtons.bind(this)); + this._previewActive = true; + }, + + stopPreview: function camera_stopPreview() { + if (this._recording) { + this.stopRecording(); + } + this.disableButtons(); + this.viewfinder.pause(); + this._previewActive = false; + this.viewfinder.mozSrcObject = null; + this.release(); + }, + + resumePreview: function camera_resumePreview() { + this._cameraObj.resumePreview(); + this._previewActive = true; + this.enableButtons(); + }, + + restartPreview: function camera_restartPreview() { + this._resumeViewfinderTimer = + window.setTimeout(this.resumePreview.bind(this), this.PREVIEW_PAUSE); + }, + + takePictureSuccess: function camera_takePictureSuccess(blob) { + this._manuallyFocused = false; + this.hideFocusRing(); + this.restartPreview(); + DCFApi.createDCFFilename(this._pictureStorage, 'image', (function(path, name) { + var addreq = this._pictureStorage.addNamed(blob, path + name); + addreq.onsuccess = (function() { + if (this._pendingPick) { + // XXX: https://bugzilla.mozilla.org/show_bug.cgi?id=806503 + // We ought to just be able to pass this blob to the activity. + // But there seems to be a bug with blob lifetimes and activities. + // So we'll get a new blob back out of device storage to ensure + // that we've got a file-backed blob instead of a memory-backed blob. + var getreq = this._pictureStorage.get(path + name); + getreq.onsuccess = (function() { + this._pendingPick.postResult({ + type: 'image/jpeg', + blob: getreq.result + }); + this.cancelPick(); + }).bind(this); + + return; + } + + Filmstrip.addImage(path + name, blob); + Filmstrip.show(Camera.FILMSTRIP_DURATION); + this.checkStorageSpace(); + + }).bind(this); + + addreq.onerror = function() { + alert(navigator.mozL10n.get('error-saving-title') + '. ' + + navigator.mozL10n.get('error-saving-text')); + }; + }).bind(this)); + }, + + hideFocusRing: function camera_hideFocusRing() { + this.focusRing.removeAttribute('data-state'); + }, + + checkStorageSpace: function camera_checkStorageSpace() { + if (this.updateOverlay()) { + return; + } + + // The first time we're called, we need to make sure that there + // is an sdcard and that it is mounted. (Subsequently the device + // storage change handler will track that.) + if (this._storageState === this.STORAGE_INIT) { + this._pictureStorage.available().onsuccess = (function(e) { + this.updateStorageState(e.target.result); + this.updateOverlay(); + // Now call the parent method again, so that if the sdcard is + // available we will actually verify that there is enough space on it + this.checkStorageSpace(); + }.bind(this)); + return; + } + + // Now verify that there is enough space to store a picture + // 4 bytes per pixel plus some room for a header should be more + // than enough for a JPEG image. + var MAX_IMAGE_SIZE = + (this._pictureSize.width * this._pictureSize.height * 4) + 4096; + + this._pictureStorage.freeSpace().onsuccess = (function(e) { + // XXX + // If we ever enter this out-of-space condition, it looks like + // this code will never be able to exit. The user will have to + // quit the app and start it again. Just deleting files will + // not be enough to get back to the STORAGE_AVAILABLE state. + // To fix this, we need an else clause here, and also a change + // in the updateOverlay() method. + if (e.target.result < MAX_IMAGE_SIZE) { + this._storageState = this.STORAGE_CAPACITY; + } + this.updateOverlay(); + }).bind(this); + }, + + deviceStorageChangeHandler: function camera_deviceStorageChangeHandler(e) { + switch (e.reason) { + case 'available': + case 'unavailable': + case 'shared': + this.updateStorageState(e.reason); + break; + } + this.checkStorageSpace(); + }, + + updateStorageState: function camera_updateStorageState(state) { + switch (state) { + case 'available': + this._storageState = this.STORAGE_AVAILABLE; + break; + case 'unavailable': + this._storageState = this.STORAGE_NOCARD; + break; + case 'shared': + this._storageState = this.STORAGE_UNMOUNTED; + break; + } + }, + + updateOverlay: function camera_updateOverlay() { + if (this._storageState === this.STORAGE_INIT) { + return false; + } + + if (this._storageState === this.STORAGE_AVAILABLE) { + // Preview may have previously been paused if storage + // was not available + if (!this._previewActive && !document.mozHidden) { + this.startPreview(); + } + this.showOverlay(null); + return false; + } + + switch (this._storageState) { + case this.STORAGE_NOCARD: + this.showOverlay('nocard'); + break; + case this.STORAGE_UNMOUNTED: + this.showOverlay('pluggedin'); + break; + case this.STORAGE_CAPACITY: + this.showOverlay('nospace2'); + break; + } + if (this._previewActive) { + this.stopPreview(); + } + return true; + }, + + prepareTakePicture: function camera_takePicture() { + this.disableButtons(); + this.focusRing.setAttribute('data-state', 'focusing'); + if (this._autoFocusSupported && !this._manuallyFocused) { + this._cameraObj.autoFocus(this.autoFocusDone.bind(this)); + } else { + this.takePicture(); + } + }, + + autoFocusDone: function camera_autoFocusDone(success) { + if (!success) { + this.enableButtons(); + this.focusRing.setAttribute('data-state', 'fail'); + window.setTimeout(this.hideFocusRing.bind(this), 1000); + return; + } + this.focusRing.setAttribute('data-state', 'focused'); + this.takePicture(); + }, + + takePicture: function camera_takePicture() { + this._config.rotation = this._phoneOrientation; + this._config.pictureSize = this._pictureSize; + if (this._position) { + this._config.position = this._position; + } + this._cameraObj + .takePicture(this._config, this.takePictureSuccess.bind(this)); + }, + + showOverlay: function camera_showOverlay(id) { + this._currentOverlay = id; + + if (id === null) { + this.overlay.classList.add('hidden'); + return; + } + + this.overlayTitle.textContent = navigator.mozL10n.get(id + '-title'); + this.overlayText.textContent = navigator.mozL10n.get(id + '-text'); + this.overlay.classList.remove('hidden'); + }, + + pickPictureSize: function camera_pickPictureSize(pictureSizes) { + var maxRes = this.MAX_IMAGE_RES; + var size = pictureSizes.reduce(function(acc, size) { + var mp = size.width * size.height; + return (mp > acc.width * acc.height && mp <= maxRes) ? size : acc; + }, {width: 0, height: 0}); + + if (size.width === 0 && size.height === 0) { + return pictureSizes[0]; + } else { + return size; + } + }, + + initPositionUpdate: function camera_initPositionUpdate() { + if (this._watchId || document.mozHidden) { + return; + } + this._watchId = navigator.geolocation + .watchPosition(this.updatePosition.bind(this)); + }, + + updatePosition: function camera_updatePosition(position) { + this._position = { + timestamp: position.timestamp, + altitude: position.coords.altitude, + latitude: position.coords.latitude, + longitude: position.coords.longitude + }; + }, + + cancelPositionUpdate: function camera_cancelPositionUpdate() { + navigator.geolocation.clearWatch(this._watchId); + this._watchId = null; + }, + + release: function camera_release(callback) { + if (!this._cameraObj) + return; + + this._cameraObj.release(function cameraReleased() { + Camera._cameraObj = null; + if (callback) + callback.call(Camera); + }, function releaseError() { + console.warn('Camera: failed to release hardware?'); + if (callback) + callback.call(Camera); + }); + } +}; + +Camera.init(); + +document.addEventListener('mozvisibilitychange', function() { + if (document.mozHidden) { + Camera.stopPreview(); + Camera.cancelPick(); + Camera.cancelPositionUpdate(); + if (this._secureMode) // If the lockscreen is locked + Filmstrip.clear(); // then forget everything when closing camera + } else { + Camera.startPreview(); + } +}); + +window.addEventListener('beforeunload', function() { + window.clearTimeout(Camera._timeoutId); + delete Camera._timeoutId; + Camera.viewfinder.mozSrcObject = null; +}); |