DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (f6a31da07ed6)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153
/* -*- 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/. */

var EXPORTED_SYMBOLS = ["AutoCompletePopup"];

/* eslint no-unused-vars: ["error", {args: "none"}] */

ChromeUtils.defineModuleGetter(
  this,
  "BrowserUtils",
  "resource://gre/modules/BrowserUtils.jsm"
);

const MESSAGES = [
  "FormAutoComplete:HandleEnter",
  "FormAutoComplete:PopupClosed",
  "FormAutoComplete:PopupOpened",
  "FormAutoComplete:RequestFocus",
];

class AutoCompletePopup {
  constructor(mm) {
    this.mm = mm;

    for (let messageName of MESSAGES) {
      mm.addMessageListener(messageName, this);
    }

    this._input = null;
    this._popupOpen = false;
  }

  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;
        break;
      }

      case "FormAutoComplete:PopupOpened": {
        this._popupOpen = true;
        break;
      }

      case "FormAutoComplete:RequestFocus": {
        if (this._input) {
          this._input.focus();
        }
        break;
      }
    }
  }

  get input() {
    return this._input;
  }
  get overrideValue() {
    return null;
  }
  set selectedIndex(index) {
    this.mm.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).
    return this.mm.sendSyncMessage("FormAutoComplete:GetSelectedIndex", {});
  }
  get popupOpen() {
    return this._popupOpen;
  }

  openAutocompletePopup(input, element) {
    if (this._popupOpen || !input) {
      return;
    }

    let rect = BrowserUtils.getElementBoundingScreenRect(element);
    let window = element.ownerGlobal;
    let dir = window.getComputedStyle(element).direction;
    let results = this.getResultsFromController(input);

    this.mm.sendAsyncMessage("FormAutoComplete:MaybeOpenPopup", {
      results,
      rect,
      dir,
    });
    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.mm.sendAsyncMessage("FormAutoComplete:ClosePopup", {});
  }

  invalidate() {
    if (this._popupOpen) {
      let results = this.getResultsFromController(this._input);
      this.mm.sendAsyncMessage("FormAutoComplete:Invalidate", { results });
    }
  }

  selectBy(reverse, page) {
    this._index = this.mm.sendSyncMessage("FormAutoComplete:SelectBy", {
      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;
  }
}