1 files changed, 272 insertions, 0 deletions
diff --git a/browser/modules/Social.jsm b/browser/modules/Social.jsm
new file mode 100644
index 000000000..1569e0122
--- /dev/null
+++ b/browser/modules/Social.jsm
@@ -0,0 +1,272 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+this.EXPORTED_SYMBOLS = ["Social", "OpenGraphBuilder",
+                         "DynamicResizeWatcher", "sizeSocialPanelToContent"];
+
+const Ci = Components.interfaces;
+const Cc = Components.classes;
+const Cu = Components.utils;
+
+// The minimum sizes for the auto-resize panel code, minimum size necessary to
+// properly show the error page in the panel.
+const PANEL_MIN_HEIGHT = 190;
+const PANEL_MIN_WIDTH = 330;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "CustomizableUI",
+  "resource:///modules/CustomizableUI.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "SocialService",
+  "resource:///modules/SocialService.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "PageMetadata",
+  "resource://gre/modules/PageMetadata.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "PlacesUtils",
+  "resource://gre/modules/PlacesUtils.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "Promise",
+  "resource://gre/modules/Promise.jsm");
+
+
+this.Social = {
+  initialized: false,
+  lastEventReceived: 0,
+  providers: [],
+  _disabledForSafeMode: false,
+
+  init: function Social_init() {
+    this._disabledForSafeMode = Services.appinfo.inSafeMode && this.enabled;
+    let deferred = Promise.defer();
+
+    if (this.initialized) {
+      deferred.resolve(true);
+      return deferred.promise;
+    }
+    this.initialized = true;
+    // if SocialService.hasEnabledProviders, retreive the providers so the
+    // front-end can generate UI
+    if (SocialService.hasEnabledProviders) {
+      // Retrieve the current set of providers, and set the current provider.
+      SocialService.getOrderedProviderList(function (providers) {
+        Social._updateProviderCache(providers);
+        Social._updateEnabledState(SocialService.enabled);
+        deferred.resolve(false);
+      });
+    } else {
+      deferred.resolve(false);
+    }
+
+    // Register an observer for changes to the provider list
+    SocialService.registerProviderListener(function providerListener(topic, origin, providers) {
+      // An engine change caused by adding/removing a provider should notify.
+      // any providers we receive are enabled in the AddonsManager
+      if (topic == "provider-installed" || topic == "provider-uninstalled") {
+        // installed/uninstalled do not send the providers param
+        Services.obs.notifyObservers(null, "social:" + topic, origin);
+        return;
+      }
+      if (topic == "provider-enabled") {
+        Social._updateProviderCache(providers);
+        Social._updateEnabledState(true);
+        Services.obs.notifyObservers(null, "social:" + topic, origin);
+        return;
+      }
+      if (topic == "provider-disabled") {
+        // a provider was removed from the list of providers, update states
+        Social._updateProviderCache(providers);
+        Social._updateEnabledState(providers.length > 0);
+        Services.obs.notifyObservers(null, "social:" + topic, origin);
+        return;
+      }
+      if (topic == "provider-update") {
+        // a provider has self-updated its manifest, we need to update our cache
+        // and reload the provider.
+        Social._updateProviderCache(providers);
+        let provider = Social._getProviderFromOrigin(origin);
+        provider.reload();
+      }
+    });
+    return deferred.promise;
+  },
+
+  _updateEnabledState: function(enable) {
+    for (let p of Social.providers) {
+      p.enabled = enable;
+    }
+  },
+
+  // Called to update our cache of providers and set the current provider
+  _updateProviderCache: function (providers) {
+    this.providers = providers;
+    Services.obs.notifyObservers(null, "social:providers-changed", null);
+  },
+
+  get enabled() {
+    return !this._disabledForSafeMode && this.providers.length > 0;
+  },
+
+  _getProviderFromOrigin: function (origin) {
+    for (let p of this.providers) {
+      if (p.origin == origin) {
+        return p;
+      }
+    }
+    return null;
+  },
+
+  getManifestByOrigin: function(origin) {
+    return SocialService.getManifestByOrigin(origin);
+  },
+
+  installProvider: function(data, installCallback, options={}) {
+    SocialService.installProvider(data, installCallback, options);
+  },
+
+  uninstallProvider: function(origin, aCallback) {
+    SocialService.uninstallProvider(origin, aCallback);
+  },
+
+  // Activation functionality
+  activateFromOrigin: function (origin, callback) {
+    // It's OK if the provider has already been activated - we still get called
+    // back with it.
+    SocialService.enableProvider(origin, callback);
+  }
+};
+
+function sizeSocialPanelToContent(panel, iframe, requestedSize) {
+  let doc = iframe.contentDocument;
+  if (!doc || !doc.body) {
+    return;
+  }
+  // We need an element to use for sizing our panel.  See if the body defines
+  // an id for that element, otherwise use the body itself.
+  let body = doc.body;
+  let docEl = doc.documentElement;
+  let bodyId = body.getAttribute("contentid");
+  if (bodyId) {
+    body = doc.getElementById(bodyId) || doc.body;
+  }
+  // offsetHeight/Width don't include margins, so account for that.
+  let cs = doc.defaultView.getComputedStyle(body);
+  let width = Math.max(PANEL_MIN_WIDTH, docEl.offsetWidth);
+  let height = Math.max(PANEL_MIN_HEIGHT, docEl.offsetHeight);
+  // if the panel is preloaded prior to being shown, cs will be null.  in that
+  // case use the minimum size for the panel until it is shown.
+  if (cs) {
+    let computedHeight = parseInt(cs.marginTop) + body.offsetHeight + parseInt(cs.marginBottom);
+    height = Math.max(computedHeight, height);
+    let computedWidth = parseInt(cs.marginLeft) + body.offsetWidth + parseInt(cs.marginRight);
+    width = Math.max(computedWidth, width);
+  }
+
+  // if our scrollHeight is still larger than the iframe, the css calculations
+  // above did not work for this site, increase the height. This can happen if
+  // the site increases its height for additional UI.
+  if (docEl.scrollHeight > iframe.boxObject.height)
+    height = docEl.scrollHeight;
+
+  // if a size was defined in the manifest use it as a minimum
+  if (requestedSize) {
+    if (requestedSize.height)
+      height = Math.max(height, requestedSize.height);
+    if (requestedSize.width)
+      width = Math.max(width, requestedSize.width);
+  }
+
+  // add the extra space used by the panel (toolbar, borders, etc) if the iframe
+  // has been loaded
+  if (iframe.boxObject.width && iframe.boxObject.height) {
+    // add extra space the panel needs if any
+    width += panel.boxObject.width - iframe.boxObject.width;
+    height += panel.boxObject.height - iframe.boxObject.height;
+  }
+
+  // using panel.sizeTo will ignore css transitions, set size via style
+  if (Math.abs(panel.boxObject.width - width) >= 2)
+    panel.style.width = width + "px";
+  if (Math.abs(panel.boxObject.height - height) >= 2)
+    panel.style.height = height + "px";
+}
+
+function DynamicResizeWatcher() {
+  this._mutationObserver = null;
+}
+
+DynamicResizeWatcher.prototype = {
+  start: function DynamicResizeWatcher_start(panel, iframe, requestedSize) {
+    this.stop(); // just in case...
+    let doc = iframe.contentDocument;
+    this._mutationObserver = new iframe.contentWindow.MutationObserver((mutations) => {
+      sizeSocialPanelToContent(panel, iframe, requestedSize);
+    });
+    // Observe anything that causes the size to change.
+    let config = {attributes: true, characterData: true, childList: true, subtree: true};
+    this._mutationObserver.observe(doc, config);
+    // and since this may be setup after the load event has fired we do an
+    // initial resize now.
+    sizeSocialPanelToContent(panel, iframe, requestedSize);
+  },
+  stop: function DynamicResizeWatcher_stop() {
+    if (this._mutationObserver) {
+      try {
+        this._mutationObserver.disconnect();
+      } catch (ex) {
+        // may get "TypeError: can't access dead object" which seems strange,
+        // but doesn't seem to indicate a real problem, so ignore it...
+      }
+      this._mutationObserver = null;
+    }
+  }
+}
+
+
+this.OpenGraphBuilder = {
+  generateEndpointURL: function(URLTemplate, pageData) {
+    // support for existing oexchange style endpoints by supporting their
+    // querystring arguments. parse the query string template and do
+    // replacements where necessary the query names may be different than ours,
+    // so we could see u=%{url} or url=%{url}
+    let [endpointURL, queryString] = URLTemplate.split("?");
+    let query = {};
+    if (queryString) {
+      queryString.split('&').forEach(function (val) {
+        let [name, value] = val.split('=');
+        let p = /%\{(.+)\}/.exec(value);
+        if (!p) {
+          // preserve non-template query vars
+          query[name] = value;
+        } else if (pageData[p[1]]) {
+          if (p[1] == "previews")
+            query[name] = pageData[p[1]][0];
+          else
+            query[name] = pageData[p[1]];
+        } else if (p[1] == "body") {
+          // build a body for emailers
+          let body = "";
+          if (pageData.title)
+            body += pageData.title + "\n\n";
+          if (pageData.description)
+            body += pageData.description + "\n\n";
+          if (pageData.text)
+            body += pageData.text + "\n\n";
+          body += pageData.url;
+          query["body"] = body;
+        }
+      });
+      // if the url template doesn't have title and no text was provided, add the title as the text.
+      if (!query.text && !query.title && pageData.title) {
+        query.text = pageData.title;
+      }
+    }
+    var str = [];
+    for (let p in query)
+       str.push(p + "=" + encodeURIComponent(query[p]));
+    if (str.length)
+      endpointURL = endpointURL + "?" + str.join("&");
+    return endpointURL;
+  },
+};