Mercurial > powerbox

annotate extension/modules/content-injector.js @ 3:413435fc6202

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We now show a notification box when a page calls window.powerbox.request().
author Atul Varma <varmaa@toolness.com>
date Thu, 06 Aug 2009 15:50:24 -0700
parents 889c2fd4c9cf
children 1c02976d8809
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889c2fd4c9cf window.powerbox.request() is now available on every content window.
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1 var EXPORTED_SYMBOLS = ["init"];
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2
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3 const Cc = Components.classes;
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4 const Ci = Components.interfaces;
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5 const Cu = Components.utils;
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6
3
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7 const REQUEST_BOX_NAME = "powerbox_superpower_request";
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8 const REQUEST_BOX_TEXT = "This web page wants superpowers.";
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9 const REQUEST_BOX_BUTTON_TEXT = "Huh?";
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10
2
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11 Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
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12
3
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13 function getParentChromeWindow(window) {
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14 var mainWindow = window.QueryInterface(Ci.nsIInterfaceRequestor)
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15 .getInterface(Ci.nsIWebNavigation)
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16 .QueryInterface(Ci.nsIDocShellTreeItem)
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17 .rootTreeItem
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18 .QueryInterface(Ci.nsIInterfaceRequestor)
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19 .getInterface(Ci.nsIDOMWindow);
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20 return mainWindow.wrappedJSObject;
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21 }
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22
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23 function showRequestNotificationBox(window, caps, callback) {
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24 var tabbrowser = getParentChromeWindow(window).getBrowser();
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25 var browser = tabbrowser.getBrowserForDocument(window.document);
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26
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27 if (browser) {
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28 var nBox = tabbrowser.getNotificationBox(browser);
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29
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30 var oldNotification = nBox.getNotificationWithValue(REQUEST_BOX_NAME);
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31 if (oldNotification)
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32 nBox.removeNotification(oldNotification);
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33
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34 nBox.appendNotification(REQUEST_BOX_TEXT,
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35 REQUEST_BOX_NAME,
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36 null,
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37 nBox.PRIORITY_INFO_MEDIUM,
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38 [{accessKey: null,
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39 // TODO: Implement a real callback.
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40 callback: function() {},
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41 label: REQUEST_BOX_BUTTON_TEXT,
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42 popup: null}]);
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43 }
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44 }
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45
2
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46 function buildRequestor(window) {
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47 return function request(caps, callback) {
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48 if (!(typeof(caps) == "object" ||
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49 typeof(caps) == "string"))
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50 throw new Error("Must provide capabilities as first parameter.");
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51
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52 if (typeof(callback) != "function")
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53 throw new Error("Must provide callback as second parameter");
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54
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55 if (typeof(caps) == "object")
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56 caps = new XPCSafeJSObjectWrapper(caps);
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57 callback = new XPCSafeJSObjectWrapper(callback);
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58
3
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59 showRequestNotificationBox(window, caps, callback);
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60 };
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61 }
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62
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63 var listener = {
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64 QueryInterface : XPCOMUtils.generateQI([Ci.nsIWebProgressListener,
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65 Ci.nsISupportsWeakReference]),
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66
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67 onStateChange : function (aWebProgress, aRequest,
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68 aStateFlags, aStatus) {
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69 // STATE_START is too early, doc is still the old page.
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70 // STATE_STOP is inconviently late (it's onload)
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71 if (!(aStateFlags & Ci.nsIWebProgressListener.STATE_TRANSFERRING))
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72 return;
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73
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74 var window = aWebProgress.DOMWindow;
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75
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76 if (window.wrappedJSObject) {
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77 var sandbox = Cu.Sandbox(window);
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78 sandbox.importFunction(buildRequestor(window));
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79 sandbox.window = window.wrappedJSObject;
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80
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81 function setupPowerbox() {
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82 window.powerbox = {request: request};
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83 }
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84
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85 Cu.evalInSandbox("(" + setupPowerbox.toString() + ")();", sandbox);
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86 }
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87 },
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88
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89 // stubs for the nsIWebProgressListener interfaces which we don't use.
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90 onProgressChange : function() { },
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91 onLocationChange : function() { },
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92 onStatusChange : function() { },
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93 onSecurityChange : function() { }
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94 };
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95
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96 function init() {
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97 // WebProgressListener for getting notification of new doc loads.
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98 // XXX Ugh. Since we're a chrome overlay, it would be nice to just
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99 // use gBrowser.addProgressListener(). But that isn't sending
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100 // STATE_TRANSFERRING, and the earliest we can get at the page is
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101 // STATE_STOP (which is onload, and is inconviently late).
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102 // We'll use the docloader service instead, but that means we need to
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103 // filter out loads for other windows.
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104 var docsvc = Cc["@mozilla.org/docloaderservice;1"].
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105 getService(Ci.nsIWebProgress);
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106
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107 docsvc.addProgressListener(listener,
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108 Ci.nsIWebProgress.NOTIFY_STATE_DOCUMENT);
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109 }