ONC import option to chromeos tab in chrome://net-internals

chrome/browser/resources/net_internals/chromeos_view.js

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * This view displays information on ChromeOS specific features.
+ */
+var CrosView = (function() {
+  'use strict';
+
+  var fileContent;
+  var passcode = '';
+
+  /**
+   *  Send file contents and passcode to C++ cros network library.
+   */
+  function importONCFile() {
+    if (fileContent) {

[James Hawkins, 2011/12/04 18:13:07]

No braces for single-line logic blocks.

[achuithb, 2011/12/04 21:56:42]

In C++, you need braces for single line blocks with else statements. So it's
different in js? Done.

[James Hawkins, 2011/12/04 22:11:54]

From the C++ style guide:

"In general, curly braces are not required for single-line statements..."

You may be confused about this line:

"Curly braces around both IF and ELSE required because one of the clauses used
braces."

The key part is that braces are only required if one of the blocks requires
braces. If they're both single line, no braces is fine.

[achuithb, 2011/12/07 18:49:28]

Ah, thanks for the explanation. Yes, I was indeed confused about this.

+      g_browser.importONCFile(fileContent, passcode);
+    } else {
+      setParseStatus(false);
+    }
+  }
+
+  /**
+   *  Set the passcode var, and trigger onc import.
+   *
+   *  @param {string} passcode
+   */
+  function setPasscode(value) {
+    passcode = value;
+    if (passcode)
+      importONCFile();
+  }
+
+  /**
+   *  Unhide the passcode prompt input field and give it focus.
+   */
+  function promptForPasscode() {
+    $(CrosView.PASSCODE_ID).hidden = false;
+    $(CrosView.PASSCODE_INPUT_ID).focus();
+    $(CrosView.PASSCODE_INPUT_ID).select();
+  }
+
+  /**
+   *  Set the fileContent var, and trigger onc import if the file appears to
+   *  not be encrypted, or prompt for passcode if the file is encrypted.
+   *
+   *  @param {string} text contents of selected file.
+   */
+  function setFileContent(result) {
+    fileContent = result;
+    // Check if file is encrypted.
+    if (fileContent.search(/begin pgp message/i) == -1) {
+      // Not encrypted, don't need passcode.
+      importONCFile();
+    } else {
+      promptForPasscode();
+    }
+  }
+
+  /**
+   *  Set ONC file parse status.
+   *
+   */
+  function setParseStatus(success) {
+    var parseStatus = $(CrosView.PARSE_STATUS_ID);
+    parseStatus.hidden = false;
+    parseStatus.textContent = status ?
+        "ONC file successfully parsed" : "ONC file parse failed";
+    reset();
+  }
+
+  /**
+   *  Add event listeners for the file selection and passcode input fields.
+   */
+  function addEventListeners() {
+    $(CrosView.IMPORT_ONC_ID).addEventListener('change', function(event) {
+      $(CrosView.PARSE_STATUS_ID).hidden = true;
+      var file = event.target.files[0];
+      var reader = new FileReader();
+      reader.onloadend = function(e) {
+        setFileContent(this.result);
+      };
+      reader.readAsText(file);
+    }, false);
+
+    $(CrosView.PASSCODE_INPUT_ID).addEventListener('change', function(event) {
+      setPasscode(this.value);
+    }, false);
+  }
+
+  /**
+   *  Reset fileContent and passcode vars.
+   */
+  function reset() {
+    fileContent = undefined;
+    passcode = '';
+    $(CrosView.PASSCODE_ID).hidden = true;
+  }
+
+  /**
+   *  @constructor
+   *  @extends {DivView}
+   */
+  function CrosView() {
+    assertFirstConstructorCall(CrosView);
+
+    // Call superclass's constructor.
+    DivView.call(this, CrosView.MAIN_BOX_ID);
+
+    g_browser.addCrosONCFileParseObserver(this);
+    addEventListeners();
+  }
+
+  // ID for special HTML element in category_tabs.html
+  CrosView.TAB_HANDLE_ID = 'tab-handle-chromeos';
+
+  CrosView.MAIN_BOX_ID = 'chromeos-view-tab-content';
+  CrosView.IMPORT_ONC_ID = 'chromeos-view-import-onc';
+  CrosView.PASSCODE_ID = 'chromeos-view-password-div';
+  CrosView.PASSCODE_INPUT_ID = 'chromeos-view-onc-password';
+  CrosView.PARSE_STATUS_ID = 'chromeos-view-parse-status';
+
+  cr.addSingletonGetter(CrosView);
+
+  CrosView.prototype = {
+    // Inherit from DivView.
+    __proto__: DivView.prototype,
+
+    onONCFileParse: setParseStatus,
+  };
+
+  return CrosView;
+})();