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