gecko-dev/b2g/chrome/content/runapp.js

172 строки
5.1 KiB
JavaScript

"use strict";
// runapp.js:
// Provide a --runapp APPNAME command-line option.
var runAppObj;
window.addEventListener('load', function() {
// Get the command line arguments that were passed to the b2g client
let args;
try {
let service = Cc["@mozilla.org/commandlinehandler/general-startup;1?type=b2gcmds"].getService(Ci.nsISupports);
args = service.wrappedJSObject.cmdLine;
} catch(e) {}
if (!args) {
return;
}
let appname;
// - Check if the argument is present before doing any work.
try {
// Returns null if the argument was not specified. Throws
// NS_ERROR_INVALID_ARG if there is no parameter specified (because
// it was the last argument or the next argument starts with '-').
// However, someone could still explicitly pass an empty argument!
appname = args.handleFlagWithParam('runapp', false);
} catch(e) {
// treat a missing parameter like an empty parameter (=> show usage)
appname = '';
}
// not specified, bail.
if (appname === null) {
return;
}
runAppObj = new AppRunner(appname);
Services.obs.addObserver(runAppObj, 'remote-browser-shown', false);
Services.obs.addObserver(runAppObj, 'inprocess-browser-shown', false);
});
window.addEventListener('unload', function() {
if (runAppObj) {
Services.obs.removeObserver(runAppObj, 'remote-browser-shown');
Services.obs.removeObserver(runAppObj, 'inprocess-browser-shown');
}
});
function AppRunner(aName) {
this._appName = aName;
this._apps = [];
}
AppRunner.prototype = {
observe: function(aSubject, aTopic, aData) {
let frameLoader = aSubject;
// get a ref to the app <iframe>
frameLoader.QueryInterface(Ci.nsIFrameLoader);
// Ignore notifications that aren't from a BrowserOrApp
if (!frameLoader.ownerIsBrowserOrAppFrame) {
return;
}
let frame = frameLoader.ownerElement;
if (!frame.appManifestURL) { // Ignore all frames but app frames
return;
}
if (aTopic == 'remote-browser-shown' ||
aTopic == 'inprocess-browser-shown') {
this.doRunApp(frame);
}
},
doRunApp: function(currentFrame) {
// - Get the list of apps since the parameter was specified
if (this._apps.length) {
this.getAllSuccess(this._apps, currentFrame)
} else {
var req = navigator.mozApps.mgmt.getAll();
req.onsuccess = function() {
this._apps = req.result;
this.getAllSuccess(this._apps, currentFrame)
}.bind(this);
req.onerror = this.getAllError.bind(this);
}
},
getAllSuccess: function(apps, currentFrame) {
function findAppWithName(name) {
let normalizedSearchName = name.replace(/[- ]+/g, '').toLowerCase();
for (let i = 0; i < apps.length; i++) {
let app = apps[i];
let normalizedAppName =
app.manifest.name.replace(/[- ]+/g, '').toLowerCase();
if (normalizedSearchName === normalizedAppName) {
return app;
}
}
return null;
}
function usageAndDie(justApps) {
if (!justApps)
dump(
'The --runapp argument specifies an app to automatically run at\n'+
'startup. We match against app names per their manifest and \n' +
'ignoring capitalization, dashes, and whitespace.\n' +
'\nThe system will load as usual except the lock screen will be ' +
'automatically be disabled.\n\n' +
'Known apps:\n');
for (let i = 0; i < apps.length; i++) {
dump(' ' + apps[i].manifest.name + '\n');
}
// Exit the b2g client
Services.startup.quit(Ci.nsIAppStartup.eAttemptQuit);
}
if (this._appName === '') {
usageAndDie();
return;
}
let appsService = Cc["@mozilla.org/AppsService;1"].getService(Ci.nsIAppsService);
let currentApp = appsService.getAppByManifestURL(currentFrame.appManifestURL);
if (!currentApp || currentApp.role !== 'homescreen') {
return;
}
let app = findAppWithName(this._appName);
if (!app) {
dump('Could not find app: "' + this._appName + '". Maybe you meant one of:\n');
usageAndDie(true);
return;
}
currentFrame.addEventListener('mozbrowserloadend', launchApp);
function launchApp() {
currentFrame.removeEventListener('mozbrowserloadend', launchApp);
let setReq =
navigator.mozSettings.createLock().set({'lockscreen.enabled': false});
setReq.onsuccess = function() {
// give the event loop 100ms to disable the lock screen
window.setTimeout(function() {
dump('--runapp launching app: ' + app.manifest.name + '\n');
app.launch();
}, 100);
};
setReq.onerror = function() {
dump('--runapp failed to disable lock-screen. Giving up.\n');
};
dump('--runapp found app: ' + app.manifest.name +
', disabling lock screen...\n');
// Disable observers once we have made the request to launch the app.
Services.obs.removeObserver(runAppObj, 'remote-browser-shown');
Services.obs.removeObserver(runAppObj, 'inprocess-browser-shown');
}
},
getAllError: function() {
dump('Problem getting the list of all apps!');
}
};