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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
#ifdef 0
/* 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/. */
#endif
/**
* This singleton represents the grid that contains all sites.
*/
var gGrid = {
/**
* The DOM node of the grid.
*/
_node: null,
get node() { return this._node; },
/**
* The cached DOM fragment for sites.
*/
_siteFragment: null,
/**
* All cells contained in the grid.
*/
_cells: null,
get cells() { return this._cells; },
/**
* All sites contained in the grid's cells. Sites may be empty.
*/
get sites() { return [for (cell of this.cells) cell.site]; },
// Tells whether the grid has already been initialized.
get ready() { return !!this._node; },
/**
* Initializes the grid.
* @param aSelector The query selector of the grid.
*/
init: function Grid_init() {
this._node = document.getElementById("newtab-grid");
this._createSiteFragment();
this._render();
},
/**
* Creates a new site in the grid.
* @param aLink The new site's link.
* @param aCell The cell that will contain the new site.
* @return The newly created site.
*/
createSite: function Grid_createSite(aLink, aCell) {
let node = aCell.node;
node.appendChild(this._siteFragment.cloneNode(true));
return new Site(node.firstElementChild, aLink);
},
/**
* Refreshes the grid and re-creates all sites.
*/
refresh: function Grid_refresh() {
let cells = this.cells;
if (!cells) {
return;
}
// Remove all sites.
cells.forEach(function (cell) {
let node = cell.node;
let child = node.firstElementChild;
if (child)
node.removeChild(child);
}, this);
// Render the grid again.
this._render();
},
/**
* Locks the grid to block all pointer events.
*/
lock: function Grid_lock() {
this.node.setAttribute("locked", "true");
},
/**
* Unlocks the grid to allow all pointer events.
*/
unlock: function Grid_unlock() {
this.node.removeAttribute("locked");
},
/**
* Creates the newtab grid.
*/
_renderGrid: function Grid_renderGrid() {
let row = document.createElementNS(HTML_NAMESPACE, "div");
let cell = document.createElementNS(HTML_NAMESPACE, "div");
row.classList.add("newtab-row");
cell.classList.add("newtab-cell");
// Clear the grid
this._node.innerHTML = "";
// Creates the structure of one row
for (let i = 0; i < gGridPrefs.gridColumns; i++) {
row.appendChild(cell.cloneNode(true));
}
// Creates the grid
for (let j = 0; j < gGridPrefs.gridRows; j++) {
this._node.appendChild(row.cloneNode(true));
}
// (Re-)initialize all cells.
let cellElements = this.node.querySelectorAll(".newtab-cell");
// Tycho: this._cells = [new Cell(this, cell) for (cell of cellElements)];
this._cells = [];
for (let cellItem of cellElements) {
this._cells.push(new Cell(this, cellItem));
}
},
/**
* Creates the DOM fragment that is re-used when creating sites.
*/
_createSiteFragment: function Grid_createSiteFragment() {
let site = document.createElementNS(HTML_NAMESPACE, "div");
site.classList.add("newtab-site");
site.setAttribute("draggable", "true");
// Create the site's inner HTML code.
site.innerHTML =
'<a class="newtab-link">' +
' <span class="newtab-thumbnail"/>' +
' <span class="newtab-title"/>' +
'</a>' +
'<input type="button" title="' + newTabString("pin") + '"' +
' class="newtab-control newtab-control-pin"/>' +
'<input type="button" title="' + newTabString("block") + '"' +
' class="newtab-control newtab-control-block"/>';
this._siteFragment = document.createDocumentFragment();
this._siteFragment.appendChild(site);
},
/**
* Renders the sites, creates all sites and puts them into their cells.
*/
_renderSites: function Grid_renderSites() {
let cells = this.cells;
// Put sites into the cells.
let links = gLinks.getLinks();
let length = Math.min(links.length, cells.length);
for (let i = 0; i < length; i++) {
if (links[i])
this.createSite(links[i], cells[i]);
}
},
/**
* Renders the grid.
*/
_render: function Grid_render() {
if (this._shouldRenderGrid()) {
this._renderGrid();
}
this._renderSites();
},
_shouldRenderGrid : function Grid_shouldRenderGrid() {
let rowsLength = this._node.querySelectorAll(".newtab-row").length;
let cellsLength = this._node.querySelectorAll(".newtab-cell").length;
return (rowsLength != gGridPrefs.gridRows ||
cellsLength != (gGridPrefs.gridRows * gGridPrefs.gridColumns));
}
};
|
