ui/webui/resources/js/cr/link_controller.js

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 /**
   6  * @fileoverview This file provides a class that can be used to open URLs based
   7  * on user interactions. It ensures a consistent behavior when it comes to
   8  * holding down Ctrl and Shift while clicking or activating the a link.
   9  *
  10  * This depends on the {@code chrome.windows} and {@code chrome.tabs}
  11  * extensions API.
  12  */
  13
  14 /**
  15  * The kind of link open we want to perform.
  16  * @enum {number}
  17  */
  18 cr.LinkKind = {
  19   FOREGROUND_TAB: 0,
  20   BACKGROUND_TAB: 1,
  21   WINDOW: 2,
  22   SELF: 3,
  23   INCOGNITO: 4
  24 };
  25
  26 cr.define('cr', function() {
  27   /**
  28    * This class is used to handle opening of links based on user actions. The
  29    * following actions are currently implemented:
  30    *
  31    * * Press Ctrl and click a link. Or click a link with your middle mouse
  32    *   button (or mousewheel). Or press Enter while holding Ctrl.
  33    *     Opens the link in a new tab in the background .
  34    * * Press Ctrl+Shift and click a link. Or press Shift and click a link with
  35    *   your middle mouse button (or mousewheel). Or press Enter while holding
  36    *   Ctrl+Shift.
  37    *     Opens the link in a new tab and switches to the newly opened tab.
  38    * * Press Shift and click a link. Or press Enter while holding Shift.
  39    *     Opens the link in a new window.
  40    *
  41    * On Mac, uses Command instead of Ctrl.
  42    * For keyboard support you need to use keydown.
  43    *
  44    * @param {!LoadTimeData} localStrings The local strings object which is used
  45    *     to localize the warning prompt in case the user tries to open a lot of
  46    *     links.
  47    * @constructor
  48    */
  49   function LinkController(localStrings) {
  50     this.localStrings_ = localStrings;
  51   }
  52
  53   LinkController.prototype = {
  54     /**
  55      * The number of links that can be opened before showing a warning confirm
  56      * message.
  57      */
  58     warningLimit: 15,
  59
  60     /**
  61      * The DOM window that we want to open links into in case we are opening
  62      * links in the same window.
  63      * @type {!Window}
  64      */
  65     window: window,
  66
  67     /**
  68      * This method is used for showing the warning confirm message when the
  69      * user is trying to open a lot of links.
  70      * @param {number} count The number of URLs to open.
  71      * @return {string} The message to show the user.
  72      */
  73     getWarningMessage: function(count) {
  74       return this.localStrings_.getStringF('should_open_all', String(count));
  75     },
  76
  77     /**
  78      * Open an URL from a mouse or keyboard event.
  79      * @param {string} url The URL to open.
  80      * @param {!Event} e The event triggering the opening of the URL.
  81      */
  82     openUrlFromEvent: function(url, e) {
  83       // We only support keydown Enter and non right click events.
  84       if (e.type == 'keydown' && e.keyIdentifier == 'Enter' ||
  85           e.button != 2) {
  86         var kind;
  87         var ctrl = cr.isMac && e.metaKey || !cr.isMac && e.ctrlKey;
  88
  89         if (e.button == 1 || ctrl) // middle, ctrl or keyboard
  90           kind = e.shiftKey ? cr.LinkKind.FOREGROUND_TAB :
  91               cr.LinkKind.BACKGROUND_TAB;
  92         else // left or keyboard
  93           kind = e.shiftKey ? cr.LinkKind.WINDOW : cr.LinkKind.SELF;
  94
  95         this.openUrls([url], kind);
  96       }
  97     },
  98
  99
 100     /**
 101      * Opens a URL in a new tab, window or incognito window.
 102      * @param {string} url The URL to open.
 103      * @param {cr.LinkKind} kind The kind of open we want to do.
 104      */
 105     openUrl: function(url, kind) {
 106       this.openUrls([url], kind);
 107     },
 108
 109     /**
 110      * Opens URLs in new tab, window or incognito mode.
 111      * @param {!Array.<string>} urls The URLs to open.
 112      * @param {cr.LinkKind} kind The kind of open we want to do.
 113      */
 114     openUrls: function(urls, kind) {
 115       if (urls.length < 1)
 116         return;
 117
 118       if (urls.length > this.warningLimit) {
 119         if (!this.window.confirm(this.getWarningMessage(urls.length)))
 120           return;
 121       }
 122
 123       // Fix '#124' URLs since opening those in a new window does not work. We
 124       // prepend the base URL when we encounter those.
 125       var base = this.window.location.href.split('#')[0];
 126       urls = urls.map(function(url) {
 127         return url[0] == '#' ? base + url : url;
 128       });
 129
 130       var incognito = kind == cr.LinkKind.INCOGNITO;
 131       if (kind == cr.LinkKind.WINDOW || incognito) {
 132         chrome.windows.create({
 133           url: urls,
 134           incognito: incognito
 135         });
 136       } else if (kind == cr.LinkKind.FOREGROUND_TAB ||
 137                  kind == cr.LinkKind.BACKGROUND_TAB) {
 138         urls.forEach(function(url, i) {
 139           chrome.tabs.create({
 140             url: url,
 141             selected: kind == cr.LinkKind.FOREGROUND_TAB && !i
 142           });
 143         });
 144       } else {
 145         this.window.location.href = urls[0];
 146       }
 147     }
 148   };
 149
 150   // Export
 151   return {
 152     LinkController: LinkController,
 153   };
 154 });