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Diffstat (limited to 'apps/system/js/screen_manager.js')
| -rw-r--r-- | apps/system/js/screen_manager.js | 503 |
1 files changed, 0 insertions, 503 deletions
diff --git a/apps/system/js/screen_manager.js b/apps/system/js/screen_manager.js deleted file mode 100644 index 9a69e8c..0000000 --- a/apps/system/js/screen_manager.js +++ /dev/null @@ -1,503 +0,0 @@ -/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- / -/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */ - -'use strict'; - -var ScreenManager = { - /* - * return the current screen status - * Must not mutate directly - use toggleScreen/turnScreenOff/turnScreenOn. - * Listen to 'screenchange' event to properly handle status changes - * This value can be "out of sync" with real mozPower value, - * we do this to give screen some time to flash before actual turn off. - */ - screenEnabled: false, - - /* - * before idle-screen-off, invoke a nice dimming to the brightness - * to notify the user that the screen is about to be turn off. - * The user can cancel the idle-screen-off by touching the screen - * and by pressing a button (trigger onactive callback on Idle API) - * - */ - _inTransition: false, - - /* - * Whether the wake lock is enabled or not - */ - _screenWakeLocked: false, - - /* - * Whether the device light is enabled or not - * sync with setting 'screen.automatic-brightness' - */ - _deviceLightEnabled: true, - - /* - * Preferred brightness without considering device light nor dimming - * sync with setting 'screen.brightness' - */ - _userBrightness: 1, - _savedBrightness: 1, - - /* - * The auto-brightness algorithm will never set the screen brightness - * to a value smaller than this. 0.1 seems like a good screen brightness - * in a completely dark room on a Unagi. - */ - AUTO_BRIGHTNESS_MINIMUM: 0.1, - - /* - * This constant is used in the auto brightness algorithm. We take - * the base 10 logarithm of the incoming lux value from the light - * sensor and multiplied it by this constant. That value is used to - * compute a weighted average with the current brightness and - * finally that average brightess is and then clamped to the range - * [AUTO_BRIGHTNESS_MINIMUM, 1.0]. - * - * Making this value larger will increase the brightness for a given - * ambient light level. At a value of about .25, the screen will be - * at full brightness in sunlight or in a well-lighted work area. - * At a value of about .3, the screen will typically be at maximum - * brightness in outdoor daylight conditions, even when overcast. - */ - AUTO_BRIGHTNESS_CONSTANT: .27, - - /* - * When we change brightness we animate it smoothly. - * This constant is the number of milliseconds between adjustments - */ - BRIGHTNESS_ADJUST_INTERVAL: 20, - - /* - * When brightening or dimming the screen, this is how much we adjust - * the brightness value at a time. - */ - BRIGHTNESS_ADJUST_STEP: 0.04, - - /* - * Wait for _dimNotice milliseconds during idle-screen-off - */ - _dimNotice: 10 * 1000, - - /* - * We track the value of the idle timeout pref in this variable. - */ - _idleTimeout: 0, - _idleTimerId: 0, - - /* - * If the screen off is triggered by promixity during phon call then - * we need wake it up while phone is ended. - */ - _screenOffByProximity: false, - - /* - * Request wakelock during in_call state. - * To ensure turnScreenOff by proximity event is protected by wakelock for - * early suspend only. - */ - _cpuWakeLock: null, - - init: function scm_init() { - window.addEventListener('sleep', this); - window.addEventListener('wake', this); - - this.screen = document.getElementById('screen'); - - var self = this; - var power = navigator.mozPower; - - if (power) { - power.addWakeLockListener(function scm_handleWakeLock(topic, state) { - switch (topic) { - case 'screen': - self._screenWakeLocked = (state == 'locked-foreground'); - - if (self._screenWakeLocked) - // Turn screen on if wake lock is acquire - self.turnScreenOn(); - self._reconfigScreenTimeout(); - break; - - case 'cpu': - power.cpuSleepAllowed = (state != 'locked-foreground' && - state != 'locked-background'); - break; - } - }); - } - - this._firstOn = false; - SettingsListener.observe('screen.timeout', 60, - function screenTimeoutChanged(value) { - if (typeof value !== 'number') - value = parseInt(value); - self._idleTimeout = value; - self._setIdleTimeout(self._idleTimeout); - - if (!self._firstOn) { - self._firstOn = true; - - // During boot up, the brightness was set by bootloader as 0.5, - // Let's set the API value to that so setScreenBrightness() can - // dim nicely to value set by user. - power.screenBrightness = 0.5; - - // Turn screen on with dim. - self.turnScreenOn(false); - } - }); - - SettingsListener.observe('screen.automatic-brightness', true, - function deviceLightSettingChanged(value) { - self.setDeviceLightEnabled(value); - }); - - SettingsListener.observe('screen.brightness', 1, - function brightnessSettingChanged(value) { - self._userBrightness = value; - self.setScreenBrightness(value, false); - }); - - var telephony = window.navigator.mozTelephony; - if (telephony) { - telephony.addEventListener('callschanged', this); - } - }, - - // - // Automatically adjust the screen brightness based on the ambient - // light (in lux) measured by the device light sensor - // - autoAdjustBrightness: function scm_adjustBrightness(lux) { - var currentBrightness = this._targetBrightness; - - if (lux < 1) // Can't take the log of 0 or negative numbers - lux = 1; - - var computedBrightness = - Math.log(lux) / Math.LN10 * this.AUTO_BRIGHTNESS_CONSTANT; - - var clampedBrightness = Math.max(this.AUTO_BRIGHTNESS_MINIMUM, - Math.min(1.0, computedBrightness)); - - // If nothing changed, we're done. - if (clampedBrightness === currentBrightness) - return; - - this.setScreenBrightness(clampedBrightness, false); - }, - - handleEvent: function scm_handleEvent(evt) { - switch (evt.type) { - case 'devicelight': - if (!this._deviceLightEnabled || !this.screenEnabled || - this._inTransition) - return; - this.autoAdjustBrightness(evt.value); - break; - - case 'sleep': - this.turnScreenOff(true); - break; - - case 'wake': - this.turnScreenOn(); - break; - - case 'userproximity': - this._screenOffByProximity = evt.near; - if (evt.near) { - this.turnScreenOff(true); - } else { - this.turnScreenOn(); - } - break; - - case 'callschanged': - var telephony = window.navigator.mozTelephony; - if (!telephony.calls.length) { - if (this._screenOffByProximity) { - this.turnScreenOn(); - } - - window.removeEventListener('userproximity', this); - this._screenOffByProximity = false; - - if (this._cpuWakeLock) { - this._cpuWakeLock.unlock(); - this._cpuWakeLock = null; - } - break; - } - - // If the _cpuWakeLock is already set we are in a multiple - // call setup, turning the screen on to let user see the - // notification. - if (this._cpuWakeLock) { - this.turnScreenOn(); - - break; - } - - // Enable the user proximity sensor once the call is connected. - var call = telephony.calls[0]; - call.addEventListener('statechange', this); - - break; - - case 'statechange': - var call = evt.target; - if (call.state !== 'connected') { - break; - } - - // The call is connected. Remove the statechange listener - // and enable the user proximity sensor. - call.removeEventListener('statechange', this); - - this._cpuWakeLock = navigator.requestWakeLock('cpu'); - window.addEventListener('userproximity', this); - break; - } - }, - - toggleScreen: function scm_toggleScreen() { - if (this.screenEnabled) { - this.turnScreenOff(); - } else { - this.turnScreenOn(); - } - }, - - turnScreenOff: function scm_turnScreenOff(instant) { - if (!this.screenEnabled) - return false; - - var self = this; - - // Remember the current screen brightness. We will restore it when - // we turn the screen back on. - self._savedBrightness = navigator.mozPower.screenBrightness; - - // Remove the cpuWakeLock if screen is not turned off by - // userproximity event. - if (!this._screenOffByProximity && this._cpuWakeLock) { - window.removeEventListener('userproximity', this); - this._cpuWakeLock.unlock(); - this._cpuWakeLock = null; - } - - var screenOff = function scm_screenOff() { - self._setIdleTimeout(0); - - window.removeEventListener('devicelight', self); - - self.screenEnabled = false; - self._inTransition = false; - self.screen.classList.add('screenoff'); - setTimeout(function realScreenOff() { - self.setScreenBrightness(0, true); - // Sometimes the ScreenManager.screenEnabled and mozPower.screenEnabled - // values are out of sync. Since the rest of the world relies only on - // the value of ScreenManager.screenEnabled it can be some situations - // where the screen is off but ScreenManager think it is on... (see - // bug 822463). Ideally a callback should have been used, like - // ScreenManager.getScreenState(function(value) { ...} ); but there - // are too many places to change that for now. - self.screenEnabled = false; - navigator.mozPower.screenEnabled = false; - }, 20); - - self.fireScreenChangeEvent(); - }; - - if (instant) { - if (!WindowManager.isFtuRunning()) { - screenOff(); - } - return true; - } - - this.setScreenBrightness(0.1, false); - this._inTransition = true; - setTimeout(function noticeTimeout() { - if (!self._inTransition) - return; - - screenOff(); - }, self._dimNotice); - - return true; - }, - - turnScreenOn: function scm_turnScreenOn(instant) { - if (this.screenEnabled) { - if (this._inTransition) { - // Cancel the dim out - this._inTransition = false; - this.setScreenBrightness(this._savedBrightness, true); - this._reconfigScreenTimeout(); - } - return false; - } - - // Set the brightness before the screen is on. - this.setScreenBrightness(this._savedBrightness, instant); - - // If we are in a call and there is no cpuWakeLock, - // we would have to get one here. - var telephony = window.navigator.mozTelephony; - if (!this._cpuWakeLock && telephony && telephony.calls.length) { - telephony.calls.some(function checkCallConnection(call) { - if (call.state == 'connected') { - this._cpuWakeLock = navigator.requestWakeLock('cpu'); - window.addEventListener('userproximity', this); - return true; - } - return false; - }, this); - } - - // Actually turn the screen on. - var power = navigator.mozPower; - if (power) - power.screenEnabled = true; - this.screenEnabled = true; - this.screen.classList.remove('screenoff'); - - // Attaching the event listener effectively turn on the hardware - // device light sensor, which _must be_ done after power.screenEnabled. - if (this._deviceLightEnabled) - window.addEventListener('devicelight', this); - - this._reconfigScreenTimeout(); - this.fireScreenChangeEvent(); - - return true; - }, - - _reconfigScreenTimeout: function scm_reconfigScreenTimeout() { - // Remove idle timer if screen wake lock is acquired. - if (this._screenWakeLocked) { - this._setIdleTimeout(0); - // The screen should be turn off with shorter timeout if - // it was never unlocked. - } else if (LockScreen.locked) { - this._setIdleTimeout(10, true); - var self = this; - var stopShortIdleTimeout = function scm_stopShortIdleTimeout() { - window.removeEventListener('unlock', stopShortIdleTimeout); - window.removeEventListener('lockpanelchange', stopShortIdleTimeout); - self._setIdleTimeout(self._idleTimeout, false); - }; - - window.addEventListener('unlock', stopShortIdleTimeout); - window.addEventListener('lockpanelchange', stopShortIdleTimeout); - } else { - this._setIdleTimeout(this._idleTimeout, false); - } - }, - - setScreenBrightness: function scm_setScreenBrightness(brightness, instant) { - this._targetBrightness = brightness; - var power = navigator.mozPower; - if (!power) - return; - - // Make sure we don't have another brightness change scheduled - if (this._transitionBrightnessTimer) { - clearTimeout(this._transitionBrightnessTimer); - this._transitionBrightnessTimer = null; - } - - if (typeof instant !== 'boolean') - instant = true; - - if (instant) { - power.screenBrightness = brightness; - return; - } - - // transitionBrightness() is a looping function that will - // gracefully tune the brightness to _targetBrightness for us. - this.transitionBrightness(); - }, - - transitionBrightness: function scm_transitionBrightness() { - var self = this; - var power = navigator.mozPower; - var screenBrightness = power.screenBrightness; - var delta = this.BRIGHTNESS_ADJUST_STEP; - - // Is this the last time adjustment we need to make? - if (Math.abs(this._targetBrightness - screenBrightness) <= delta) { - power.screenBrightness = this._targetBrightness; - this._transitionBrightnessTimer = null; - return; - } - - if (screenBrightness > this._targetBrightness) - delta *= -1; - - screenBrightness += delta; - power.screenBrightness = screenBrightness; - - this._transitionBrightnessTimer = - setTimeout(function transitionBrightnessTimeout() { - self.transitionBrightness(); - }, this.BRIGHTNESS_ADJUST_INTERVAL); - }, - - setDeviceLightEnabled: function scm_setDeviceLightEnabled(enabled) { - if (!enabled && this._deviceLightEnabled) { - // Disabled -- set the brightness back to preferred brightness - this.setScreenBrightness(this._userBrightness, false); - } - this._deviceLightEnabled = enabled; - - if (!this.screenEnabled) - return; - - // Disable/enable device light sensor accordingly. - // This will also toggle the actual hardware, which - // must be done while the screen is on. - if (enabled) { - window.addEventListener('devicelight', this); - } else { - window.removeEventListener('devicelight', this); - } - }, - - _setIdleTimeout: function scm_setIdleTimeout(time, instant) { - window.clearIdleTimeout(this._idleTimerId); - - // Reset the idled state back to false. - this._idled = false; - - // 0 is the value used to disable idle timer by user and by us. - if (time === 0) - return; - - var self = this; - var idleCallback = function idle_proxy() { - self.turnScreenOff(instant); - }; - var activeCallback = function active_proxy() { - self.turnScreenOn(true); - }; - - this._idleTimerId = window.setIdleTimeout(idleCallback, - activeCallback, time * 1000); - }, - - fireScreenChangeEvent: function scm_fireScreenChangeEvent() { - var evt = new CustomEvent('screenchange', - { bubbles: true, cancelable: false, - detail: { screenEnabled: this.screenEnabled } }); - window.dispatchEvent(evt); - } -}; - -ScreenManager.init(); |