source: sandbox/expressoMail1_2/MailArchiver/2.2/expressoMail1_2/js/gears_init.js @ 670

Revision 670, 3.3 KB checked in by eduardoalex, 15 years ago (diff)

Ticket #413

Line 
1// Copyright 2007, Google Inc.
2//
3// Redistribution and use in source and binary forms, with or without
4// modification, are permitted provided that the following conditions are met:
5//
6//  1. Redistributions of source code must retain the above copyright notice,
7//     this list of conditions and the following disclaimer.
8//  2. Redistributions in binary form must reproduce the above copyright notice,
9//     this list of conditions and the following disclaimer in the documentation
10//     and/or other materials provided with the distribution.
11//  3. Neither the name of Google Inc. nor the names of its contributors may be
12//     used to endorse or promote products derived from this software without
13//     specific prior written permission.
14//
15// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
16// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
17// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
18// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25//
26// Sets up google.gears.*, which is *the only* supported way to access Gears.
27//
28// Circumvent this file at your own risk!
29//
30// In the future, Gears may automatically define google.gears.* without this
31// file. Gears may use these objects to transparently fix bugs and compatibility
32// issues. Applications that use the code below will continue to work seamlessly
33// when that happens.
34
35(function() {
36  // We are already defined. Hooray!
37  if (window.google && google.gears) {
38    return;
39  }
40
41  var factory = null;
42
43  // Firefox
44  if (typeof GearsFactory != 'undefined') {
45    factory = new GearsFactory();
46  } else {
47    // IE
48    try {
49      factory = new ActiveXObject('Gears.Factory');
50      // privateSetGlobalObject is only required and supported on WinCE.
51      if (factory.getBuildInfo().indexOf('ie_mobile') != -1) {
52        factory.privateSetGlobalObject(this);
53      }
54    } catch (e) {
55      // Safari
56      if ((typeof navigator.mimeTypes != 'undefined')
57           && navigator.mimeTypes["application/x-googlegears"]) {
58        factory = document.createElement("object");
59        factory.style.display = "none";
60        factory.width = 0;
61        factory.height = 0;
62        factory.type = "application/x-googlegears";
63        document.documentElement.appendChild(factory);
64      }
65    }
66  }
67
68  // *Do not* define any objects if Gears is not installed. This mimics the
69  // behavior of Gears defining the objects in the future.
70  if (!factory) {
71    return;
72  }
73
74  // Now set up the objects, being careful not to overwrite anything.
75  //
76  // Note: In Internet Explorer for Windows Mobile, you can't add properties to
77  // the window object. However, global objects are automatically added as
78  // properties of the window object in all browsers.
79  if (!window.google) {
80    google = {};
81  }
82
83  if (!google.gears) {
84    google.gears = {factory: factory};
85  }
86})();
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