Bug 782862 - Add a --runapp command to b2g-desktop to automatically start an app, r=vingtetun

b2g/chrome/content/runapp.js

@@ -0,0 +1,93 @@
+// runapp.js:
+// Provide a --runapp APPNAME command-line option.
+
+window.addEventListener('load', function() {
+  // Get the command line arguments that were passed to the b2g client
+  let args = window.arguments[0].QueryInterface(Ci.nsICommandLine);
+  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;
+
+  // - Get the list of apps since the parameter was specified
+  let appsReq = navigator.mozApps.mgmt.getAll();
+  appsReq.onsuccess = function() {
+    let apps = appsReq.result;
+    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 (appname === '') {
+      usageAndDie();
+      return;
+    }
+
+    let app = findAppWithName(appname);
+    if (!app) {
+      dump('Could not find app: "' + appname + '". Maybe you meant one of:\n');
+      usageAndDie(true);
+      return;
+    }
+
+    let setReq =
+      navigator.mozSettings.getLock().set({'lockscreen.enabled': false});
+    setReq.onsuccess = function() {
+      // give the event loop another turn to disable the lock screen
+      window.setTimeout(function() {
+        dump('--runapp launching app: ' + app.manifest.name + '\n');
+        app.launch();
+      }, 0);
+    };
+    setReq.onerror = function() {
+      dump('--runapp failed to disable lock-screen.  Giving up.\n');
+    };
+
+    dump('--runapp found app: ' + app.manifest.name +
+         ', disabling lock screen...\n');
+ };
+ appsReq.onerror = function() {
+   dump('Problem getting the list of all apps!');
+ };
+});

b2g/chrome/content/shell.xul

@@ -20,6 +20,8 @@
 #ifndef ANDROID
   <!-- this script handles the screen argument for desktop builds -->
   <script type="application/javascript" src="chrome://browser/content/screen.js"/>
+  <!-- this script handles the "runapp" argument for desktop builds -->
+  <script type="application/javascript" src="chrome://browser/content/runapp.js"/>
 #endif
   <!-- The html:iframe containing the UI is created here. -->
 </window>

b2g/chrome/jar.mn

@@ -16,6 +16,7 @@ chrome.jar:
 * content/shell.js                      (content/shell.js)
 #ifndef ANDROID
   content/screen.js                     (content/screen.js)
+  content/runapp.js                     (content/runapp.js)
 #endif
   content/content.css                   (content/content.css)
   content/touchcontrols.css             (content/touchcontrols.css)