browser/base/content/newtab/cells.js@b8a032363ba2
browser/base/content/newtab/cells.js
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
1 #ifdef 0
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
4 * You can obtain one at http://mozilla.org/MPL/2.0/. */
5 #endif
7 /**
8 * This class manages a cell's DOM node (not the actually cell content, a site).
9 * It's mostly read-only, i.e. all manipulation of both position and content
10 * aren't handled here.
11 */
12 function Cell(aGrid, aNode) {
13 this._grid = aGrid;
14 this._node = aNode;
15 this._node._newtabCell = this;
17 // Register drag-and-drop event handlers.
18 ["dragenter", "dragover", "dragexit", "drop"].forEach(function (aType) {
19 this._node.addEventListener(aType, this, false);
20 }, this);
21 }
23 Cell.prototype = {
24 /**
25 * The grid.
26 */
27 _grid: null,
29 /**
30 * The cell's DOM node.
31 */
32 get node() this._node,
34 /**
35 * The cell's offset in the grid.
36 */
37 get index() {
38 let index = this._grid.cells.indexOf(this);
40 // Cache this value, overwrite the getter.
41 Object.defineProperty(this, "index", {value: index, enumerable: true});
43 return index;
44 },
46 /**
47 * The previous cell in the grid.
48 */
49 get previousSibling() {
50 let prev = this.node.previousElementSibling;
51 prev = prev && prev._newtabCell;
53 // Cache this value, overwrite the getter.
54 Object.defineProperty(this, "previousSibling", {value: prev, enumerable: true});
56 return prev;
57 },
59 /**
60 * The next cell in the grid.
61 */
62 get nextSibling() {
63 let next = this.node.nextElementSibling;
64 next = next && next._newtabCell;
66 // Cache this value, overwrite the getter.
67 Object.defineProperty(this, "nextSibling", {value: next, enumerable: true});
69 return next;
70 },
72 /**
73 * The site contained in the cell, if any.
74 */
75 get site() {
76 let firstChild = this.node.firstElementChild;
77 return firstChild && firstChild._newtabSite;
78 },
80 /**
81 * Checks whether the cell contains a pinned site.
82 * @return Whether the cell contains a pinned site.
83 */
84 containsPinnedSite: function Cell_containsPinnedSite() {
85 let site = this.site;
86 return site && site.isPinned();
87 },
89 /**
90 * Checks whether the cell contains a site (is empty).
91 * @return Whether the cell is empty.
92 */
93 isEmpty: function Cell_isEmpty() {
94 return !this.site;
95 },
97 /**
98 * Handles all cell events.
99 */
100 handleEvent: function Cell_handleEvent(aEvent) {
101 // We're not responding to external drag/drop events
102 // when our parent window is in private browsing mode.
103 if (inPrivateBrowsingMode() && !gDrag.draggedSite)
104 return;
106 if (aEvent.type != "dragexit" && !gDrag.isValid(aEvent))
107 return;
109 switch (aEvent.type) {
110 case "dragenter":
111 aEvent.preventDefault();
112 gDrop.enter(this, aEvent);
113 break;
114 case "dragover":
115 aEvent.preventDefault();
116 break;
117 case "dragexit":
118 gDrop.exit(this, aEvent);
119 break;
120 case "drop":
121 aEvent.preventDefault();
122 gDrop.drop(this, aEvent);
123 break;
124 }
125 }
126 };
