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#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));
}
};
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