1 files changed, 197 insertions, 0 deletions
diff --git a/toolkit/actors/AutoCompleteChild.sys.mjs b/toolkit/actors/AutoCompleteChild.sys.mjs
new file mode 100644
index 0000000000..a405834ca9
--- /dev/null
+++ b/toolkit/actors/AutoCompleteChild.sys.mjs
@@ -0,0 +1,197 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* 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 no-unused-vars: ["error", {args: "none"}] */
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  ContentDOMReference: "resource://gre/modules/ContentDOMReference.sys.mjs",
+  LayoutUtils: "resource://gre/modules/LayoutUtils.sys.mjs",
+  LoginHelper: "resource://gre/modules/LoginHelper.sys.mjs",
+});
+
+let autoCompleteListeners = new Set();
+
+export class AutoCompleteChild extends JSWindowActorChild {
+  constructor() {
+    super();
+
+    this._input = null;
+    this._popupOpen = false;
+  }
+
+  static addPopupStateListener(listener) {
+    autoCompleteListeners.add(listener);
+  }
+
+  static removePopupStateListener(listener) {
+    autoCompleteListeners.delete(listener);
+  }
+
+  receiveMessage(message) {
+    switch (message.name) {
+      case "FormAutoComplete:HandleEnter": {
+        this.selectedIndex = message.data.selectedIndex;
+
+        let controller = Cc[
+          "@mozilla.org/autocomplete/controller;1"
+        ].getService(Ci.nsIAutoCompleteController);
+        controller.handleEnter(message.data.isPopupSelection);
+        break;
+      }
+
+      case "FormAutoComplete:PopupClosed": {
+        this._popupOpen = false;
+        this.notifyListeners(message.name, message.data);
+        break;
+      }
+
+      case "FormAutoComplete:PopupOpened": {
+        this._popupOpen = true;
+        this.notifyListeners(message.name, message.data);
+        break;
+      }
+
+      case "FormAutoComplete:Focus": {
+        // XXX See bug 1582722
+        // Before bug 1573836, the messages here didn't match
+        // ("FormAutoComplete:Focus" versus "FormAutoComplete:RequestFocus")
+        // so this was never called. However this._input is actually a
+        // nsIAutoCompleteInput, which doesn't have a focus() method, so it
+        // wouldn't have worked anyway. So for now, I have just disabled this.
+        /*
+        if (this._input) {
+          this._input.focus();
+        }
+        */
+        break;
+      }
+    }
+  }
+
+  notifyListeners(messageName, data) {
+    for (let listener of autoCompleteListeners) {
+      try {
+        listener.popupStateChanged(messageName, data, this.contentWindow);
+      } catch (ex) {
+        console.error(ex);
+      }
+    }
+  }
+
+  get input() {
+    return this._input;
+  }
+
+  set selectedIndex(index) {
+    this.sendAsyncMessage("FormAutoComplete:SetSelectedIndex", { index });
+  }
+
+  get selectedIndex() {
+    // selectedIndex getter must be synchronous because we need the
+    // correct value when the controller is in controller::HandleEnter.
+    // We can't easily just let the parent inform us the new value every
+    // time it changes because not every action that can change the
+    // selectedIndex is trivial to catch (e.g. moving the mouse over the
+    // list).
+    let selectedIndexResult = Services.cpmm.sendSyncMessage(
+      "FormAutoComplete:GetSelectedIndex",
+      {
+        browsingContext: this.browsingContext,
+      }
+    );
+
+    if (
+      selectedIndexResult.length != 1 ||
+      !Number.isInteger(selectedIndexResult[0])
+    ) {
+      throw new Error("Invalid autocomplete selectedIndex");
+    }
+    return selectedIndexResult[0];
+  }
+
+  get popupOpen() {
+    return this._popupOpen;
+  }
+
+  openAutocompletePopup(input, element) {
+    if (this._popupOpen || !input) {
+      return;
+    }
+
+    let rect = lazy.LayoutUtils.getElementBoundingScreenRect(element);
+    let window = element.ownerGlobal;
+    let dir = window.getComputedStyle(element).direction;
+    let results = this.getResultsFromController(input);
+    let formOrigin = lazy.LoginHelper.getLoginOrigin(
+      element.ownerDocument.documentURI
+    );
+    let inputElementIdentifier = lazy.ContentDOMReference.get(element);
+
+    this.sendAsyncMessage("FormAutoComplete:MaybeOpenPopup", {
+      results,
+      rect,
+      dir,
+      inputElementIdentifier,
+      formOrigin,
+    });
+
+    this._input = input;
+  }
+
+  closePopup() {
+    // We set this here instead of just waiting for the
+    // PopupClosed message to do it so that we don't end
+    // up in a state where the content thinks that a popup
+    // is open when it isn't (or soon won't be).
+    this._popupOpen = false;
+    this.sendAsyncMessage("FormAutoComplete:ClosePopup", {});
+  }
+
+  invalidate() {
+    if (this._popupOpen) {
+      let results = this.getResultsFromController(this._input);
+      this.sendAsyncMessage("FormAutoComplete:Invalidate", { results });
+    }
+  }
+
+  selectBy(reverse, page) {
+    Services.cpmm.sendSyncMessage("FormAutoComplete:SelectBy", {
+      browsingContext: this.browsingContext,
+      reverse,
+      page,
+    });
+  }
+
+  getResultsFromController(inputField) {
+    let results = [];
+
+    if (!inputField) {
+      return results;
+    }
+
+    let controller = inputField.controller;
+    if (!(controller instanceof Ci.nsIAutoCompleteController)) {
+      return results;
+    }
+
+    for (let i = 0; i < controller.matchCount; ++i) {
+      let result = {};
+      result.value = controller.getValueAt(i);
+      result.label = controller.getLabelAt(i);
+      result.comment = controller.getCommentAt(i);
+      result.style = controller.getStyleAt(i);
+      result.image = controller.getImageAt(i);
+      results.push(result);
+    }
+
+    return results;
+  }
+}
+
+AutoCompleteChild.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsIAutoCompletePopup",
+]);