1 files changed, 149 insertions, 0 deletions
diff --git a/devtools/client/responsive.html/components/browser.js b/devtools/client/responsive.html/components/browser.js
new file mode 100644
index 000000000..f2902905b
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+++ b/devtools/client/responsive.html/components/browser.js
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+/* 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/. */
+
+/* eslint-env browser */
+
+"use strict";
+
+const { Task } = require("devtools/shared/task");
+const flags = require("devtools/shared/flags");
+const { getToplevelWindow } = require("sdk/window/utils");
+const { DOM: dom, createClass, addons, PropTypes } =
+  require("devtools/client/shared/vendor/react");
+
+const Types = require("../types");
+const e10s = require("../utils/e10s");
+const message = require("../utils/message");
+
+module.exports = createClass({
+
+  /**
+   * This component is not allowed to depend directly on frequently changing
+   * data (width, height) due to the use of `dangerouslySetInnerHTML` below.
+   * Any changes in props will cause the <iframe> to be removed and added again,
+   * throwing away the current state of the page.
+   */
+  displayName: "Browser",
+
+  propTypes: {
+    location: Types.location.isRequired,
+    swapAfterMount: PropTypes.bool.isRequired,
+    onBrowserMounted: PropTypes.func.isRequired,
+    onContentResize: PropTypes.func.isRequired,
+  },
+
+  mixins: [ addons.PureRenderMixin ],
+
+  /**
+   * Once the browser element has mounted, load the frame script and enable
+   * various features, like floating scrollbars.
+   */
+  componentDidMount: Task.async(function* () {
+    // If we are not swapping browsers after mount, it's safe to start the frame
+    // script now.
+    if (!this.props.swapAfterMount) {
+      yield this.startFrameScript();
+    }
+
+    // Notify manager.js that this browser has mounted, so that it can trigger
+    // a swap if needed and continue with the rest of its startup.
+    this.props.onBrowserMounted();
+
+    // If we are swapping browsers after mount, wait for the swap to complete
+    // and start the frame script after that.
+    if (this.props.swapAfterMount) {
+      yield message.wait(window, "start-frame-script");
+      yield this.startFrameScript();
+      message.post(window, "start-frame-script:done");
+    }
+
+    // Stop the frame script when requested in the future.
+    message.wait(window, "stop-frame-script").then(() => {
+      this.stopFrameScript();
+    });
+  }),
+
+  onContentResize(msg) {
+    let { onContentResize } = this.props;
+    let { width, height } = msg.data;
+    onContentResize({
+      width,
+      height,
+    });
+  },
+
+  startFrameScript: Task.async(function* () {
+    let { onContentResize } = this;
+    let browser = this.refs.browserContainer.querySelector("iframe.browser");
+    let mm = browser.frameLoader.messageManager;
+
+    // Notify tests when the content has received a resize event.  This is not
+    // quite the same timing as when we _set_ a new size around the browser,
+    // since it still needs to do async work before the content is actually
+    // resized to match.
+    e10s.on(mm, "OnContentResize", onContentResize);
+
+    let ready = e10s.once(mm, "ChildScriptReady");
+    mm.loadFrameScript("resource://devtools/client/responsivedesign/" +
+                       "responsivedesign-child.js", true);
+    yield ready;
+
+    let browserWindow = getToplevelWindow(window);
+    let requiresFloatingScrollbars =
+      !browserWindow.matchMedia("(-moz-overlay-scrollbars)").matches;
+
+    yield e10s.request(mm, "Start", {
+      requiresFloatingScrollbars,
+      // Tests expect events on resize to yield on various size changes
+      notifyOnResize: flags.testing,
+    });
+  }),
+
+  stopFrameScript: Task.async(function* () {
+    let { onContentResize } = this;
+
+    let browser = this.refs.browserContainer.querySelector("iframe.browser");
+    let mm = browser.frameLoader.messageManager;
+    e10s.off(mm, "OnContentResize", onContentResize);
+    yield e10s.request(mm, "Stop");
+    message.post(window, "stop-frame-script:done");
+  }),
+
+  render() {
+    let {
+      location,
+    } = this.props;
+
+    // innerHTML expects & to be an HTML entity
+    location = location.replace(/&/g, "&amp;");
+
+    return dom.div(
+      {
+        ref: "browserContainer",
+        className: "browser-container",
+
+        /**
+         * React uses a whitelist for attributes, so we need some way to set
+         * attributes it does not know about, such as @mozbrowser.  If this were
+         * the only issue, we could use componentDidMount or ref: node => {} to
+         * set the atttibutes. In the case of @remote, the attribute must be set
+         * before the element is added to the DOM to have any effect, which we
+         * are able to do with this approach.
+         *
+         * @noisolation and @allowfullscreen are needed so that these frames
+         * have the same access to browser features as regular browser tabs.
+         * The `swapFrameLoaders` platform API we use compares such features
+         * before allowing the swap to proceed.
+         */
+        dangerouslySetInnerHTML: {
+          __html: `<iframe class="browser" mozbrowser="true" remote="true"
+                           noisolation="true" allowfullscreen="true"
+                           src="${location}" width="100%" height="100%">
+                   </iframe>`
+        }
+      }
+    );
+  },
+
+});