1 files changed, 164 insertions, 0 deletions
diff --git a/remote/targets/TabTarget.jsm b/remote/targets/TabTarget.jsm
new file mode 100644
index 0000000000..fd672677aa
--- /dev/null
+++ b/remote/targets/TabTarget.jsm
@@ -0,0 +1,164 @@
+/* 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";
+
+var EXPORTED_SYMBOLS = ["TabTarget"];
+
+const { Target } = ChromeUtils.import(
+  "chrome://remote/content/targets/Target.jsm"
+);
+const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
+const { TabSession } = ChromeUtils.import(
+  "chrome://remote/content/sessions/TabSession.jsm"
+);
+const { XPCOMUtils } = ChromeUtils.import(
+  "resource://gre/modules/XPCOMUtils.jsm"
+);
+const { RemoteAgent } = ChromeUtils.import(
+  "chrome://remote/content/RemoteAgent.jsm"
+);
+
+XPCOMUtils.defineLazyServiceGetter(
+  this,
+  "Favicons",
+  "@mozilla.org/browser/favicon-service;1",
+  "nsIFaviconService"
+);
+
+/**
+ * Target for a local tab or a remoted frame.
+ */
+class TabTarget extends Target {
+  /**
+   * @param Targets targets
+   * @param BrowserElement browser
+   */
+  constructor(targets, browser) {
+    super(targets, TabSession);
+
+    this.browser = browser;
+
+    // Define the HTTP path to query this target
+    this.path = `/devtools/page/${this.id}`;
+
+    Services.obs.addObserver(this, "message-manager-disconnect");
+  }
+
+  destructor() {
+    Services.obs.removeObserver(this, "message-manager-disconnect");
+    super.destructor();
+  }
+
+  get browserContextId() {
+    return parseInt(this.browser.getAttribute("usercontextid"));
+  }
+
+  get browsingContext() {
+    return this.browser.browsingContext;
+  }
+
+  get mm() {
+    return this.browser.messageManager;
+  }
+
+  get window() {
+    return this.browser.ownerGlobal;
+  }
+
+  get tab() {
+    return this.window.gBrowser.getTabForBrowser(this.browser);
+  }
+
+  /**
+   * Determines if the content browser remains attached
+   * to its parent chrome window.
+   *
+   * We determine this by checking if the <browser> element
+   * is still attached to the DOM.
+   *
+   * @return {boolean}
+   *     True if target's browser is still attached,
+   *     false if it has been disconnected.
+   */
+  get closed() {
+    return !this.browser || !this.browser.isConnected;
+  }
+
+  get description() {
+    return "";
+  }
+
+  get frontendURL() {
+    return null;
+  }
+
+  /** @return {Promise.<String=>} */
+  get faviconUrl() {
+    return new Promise((resolve, reject) => {
+      Favicons.getFaviconURLForPage(this.browser.currentURI, url => {
+        if (url) {
+          resolve(url.spec);
+        } else {
+          resolve(null);
+        }
+      });
+    });
+  }
+
+  get title() {
+    return this.browsingContext.currentWindowGlobal.documentTitle;
+  }
+
+  get type() {
+    return "page";
+  }
+
+  get url() {
+    return this.browser.currentURI.spec;
+  }
+
+  get wsDebuggerURL() {
+    const { host, port } = RemoteAgent;
+    return `ws://${host}:${port}${this.path}`;
+  }
+
+  toString() {
+    return `[object Target ${this.id}]`;
+  }
+
+  toJSON() {
+    return {
+      description: this.description,
+      devtoolsFrontendUrl: this.frontendURL,
+      // TODO(ato): toJSON cannot be marked async )-:
+      faviconUrl: "",
+      id: this.id,
+      // Bug 1680817: Fails to encode some UTF-8 characters
+      // title: this.title,
+      type: this.type,
+      url: this.url,
+      browsingContextId: this.browsingContext.id,
+      webSocketDebuggerUrl: this.wsDebuggerURL,
+    };
+  }
+
+  // nsIObserver
+
+  observe(subject, topic, data) {
+    if (subject === this.mm && subject == "message-manager-disconnect") {
+      // disconnect debugging target if <browser> is disconnected,
+      // otherwise this is just a host process change
+      if (this.closed) {
+        this.disconnect();
+      }
+    }
+  }
+
+  // XPCOM
+
+  get QueryInterface() {
+    return ChromeUtils.generateQI(["nsIHttpRequestHandler", "nsIObserver"]);
+  }
+}