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88 lines
3.3 KiB
JavaScript
88 lines
3.3 KiB
JavaScript
// Copyright 2007, Google Inc.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// 3. Neither the name of Google Inc. nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Sets up google.gears.*, which is *the only* supported way to access Gears.
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//
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// Circumvent this file at your own risk!
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//
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// In the future, Gears may automatically define google.gears.* without this
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// file. Gears may use these objects to transparently fix bugs and compatibility
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// issues. Applications that use the code below will continue to work seamlessly
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// when that happens.
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(function() {
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// We are already defined. Hooray!
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if (window.google && google.gears) {
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return;
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}
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var factory = null;
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// Firefox
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if (typeof GearsFactory != 'undefined') {
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factory = new GearsFactory();
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} else {
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// IE
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try {
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factory = new ActiveXObject('Gears.Factory');
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// privateSetGlobalObject is only required and supported on IE Mobile on
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// WinCE.
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if (factory.getBuildInfo().indexOf('ie_mobile') != -1) {
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factory.privateSetGlobalObject(this);
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}
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} catch (e) {
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// Safari
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if ((typeof navigator.mimeTypes != 'undefined')
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&& navigator.mimeTypes["application/x-googlegears"]) {
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factory = document.createElement("object");
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factory.style.display = "none";
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factory.width = 0;
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factory.height = 0;
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factory.type = "application/x-googlegears";
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document.documentElement.appendChild(factory);
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}
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}
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}
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// *Do not* define any objects if Gears is not installed. This mimics the
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// behavior of Gears defining the objects in the future.
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if (!factory) {
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return;
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}
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// Now set up the objects, being careful not to overwrite anything.
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//
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// Note: In Internet Explorer for Windows Mobile, you can't add properties to
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// the window object. However, global objects are automatically added as
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// properties of the window object in all browsers.
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if (!window.google) {
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google = {};
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}
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if (!google.gears) {
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google.gears = {factory: factory};
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}
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})();
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