The Tor Browser: toolkit/modules/SelectContentHelper.jsm@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 "use strict";

     7 const Cc = Components.classes;

     8 const Ci = Components.interfaces;

     9 const Cu = Components.utils;

    11 Cu.import("resource://gre/modules/XPCOMUtils.jsm");

    13 XPCOMUtils.defineLazyModuleGetter(this, "BrowserUtils",

    14                                   "resource://gre/modules/BrowserUtils.jsm");

    16 this.EXPORTED_SYMBOLS = [

    17   "SelectContentHelper"

    18 ];

    20 this.SelectContentHelper = function (aElement, aGlobal) {

    21   this.element = aElement;

    22   this.global = aGlobal;

    23   this.init();

    24   this.showDropDown();

    25 }

    27 this.SelectContentHelper.prototype = {

    28   init: function() {

    29     this.global.addMessageListener("Forms:SelectDropDownItem", this);

    30     this.global.addMessageListener("Forms:DismissedDropDown", this);

    31     this.global.addEventListener("pagehide", this);

    32   },

    34   uninit: function() {

    35     this.global.removeMessageListener("Forms:SelectDropDownItem", this);

    36     this.global.removeMessageListener("Forms:DismissedDropDown", this);

    37     this.global.removeEventListener("pagehide", this);

    38     this.element = null;

    39     this.global = null;

    40   },

    42   showDropDown: function() {

    43     let rect = this._getBoundingContentRect();

    45     this.global.sendAsyncMessage("Forms:ShowDropDown", {

    46       rect: rect,

    47       options: this._buildOptionList(),

    48       selectedIndex: this.element.selectedIndex,

    49     });

    50   },

    52   _getBoundingContentRect: function() {

    53     return BrowserUtils.getElementBoundingScreenRect(this.element);

    54   },

    56   _buildOptionList: function() {

    57     return buildOptionListForChildren(this.element);

    58   },

    60   receiveMessage: function(message) {

    61     switch (message.name) {

    62       case "Forms:SelectDropDownItem":

    63         if (this.element.selectedIndex != message.data.value) {

    64           this.element.selectedIndex = message.data.value;

    66           let event = this.element.ownerDocument.createEvent("Events");

    67           event.initEvent("change", true, true);

    68           this.element.dispatchEvent(event);

    69         }

    71         //intentional fall-through

    72       case "Forms:DismissedDropDown":

    73         this.uninit();

    74         break;

    75     }

    76   },

    78   handleEvent: function(event) {

    79     switch (event.type) {

    80       case "pagehide":

    81         this.global.sendAsyncMessage("Forms:HideDropDown", {});

    82         this.uninit();

    83         break;

    84     }

    85   }

    87 }

    89 function buildOptionListForChildren(node) {

    90   let result = [];

    91   for (let child = node.firstChild; child; child = child.nextSibling) {

    92     if (child.tagName == 'OPTION' || child.tagName == 'OPTGROUP') {

    93       let info = {

    94         tagName: child.tagName,

    95         textContent: child.tagName == 'OPTGROUP' ? child.getAttribute("label")

    96                                                  : child.textContent,

    97         // XXX this uses a highlight color when this is the selected element.

    98         // We need to suppress such highlighting in the content process to get

    99         // the option's correct unhighlighted color here.

   100         // We also need to detect default color vs. custom so that a standard

   101         // color does not override color: menutext in the parent.

   102         // backgroundColor: computedStyle.backgroundColor,

   103         // color: computedStyle.color,

   104         children: child.tagName == 'OPTGROUP' ? buildOptionListForChildren(child) : []

   105       };

   106       result.push(info);

   107     }

   108   }

   109   return result;

   110 }

The Tor Browser / file revision