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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,
+ _gridDefaultContent: null,
+ get node() { return this._node; },
+
+ /**
+ * The cached DOM fragment for sites.
+ */
+ _siteFragment: null,
+
+ /**
+ * All cells contained in the grid.
+ */
+ _cells: [],
+ 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];
+ let aSites = [];
+ for (let cell of this.cells) {
+ aSites.push(cell.site);
+ }
+ return aSites;
+ },
+
+ // Tells whether the grid has already been initialized.
+ get ready() { return !!this._ready; },
+
+ // Returns whether the page has finished loading yet.
+ get isDocumentLoaded() { return document.readyState == "complete"; },
+
+ /**
+ * Initializes the grid.
+ * @param aSelector The query selector of the grid.
+ */
+ init: function Grid_init() {
+ this._node = document.getElementById("newtab-grid");
+ this._gridDefaultContent = this._node.lastChild;
+ this._createSiteFragment();
+
+ gLinks.populateCache(() => {
+ this._refreshGrid();
+ this._ready = true;
+ });
+ },
+
+ /**
+ * 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);
+ },
+
+ /**
+ * Handles all grid events.
+ */
+ handleEvent: function Grid_handleEvent(aEvent) {
+ // Any specific events should go here.
+ },
+
+ /**
+ * 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");
+ },
+
+ /**
+ * Renders the grid.
+ */
+ refresh() {
+ this._refreshGrid();
+ },
+
+ /**
+ * Renders the grid, including cells and sites.
+ */
+ _refreshGrid() {
+ let row = document.createElementNS(HTML_NAMESPACE, "div");
+ row.classList.add("newtab-row");
+ let cell = document.createElementNS(HTML_NAMESPACE, "div");
+ 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));
+ }
+
+ // Create cell array.
+ let cellElements = this.node.querySelectorAll(".newtab-cell");
+ let cells = Array.from(cellElements, (cell) => new Cell(this, cell));
+
+ // Fetch links.
+ let links = gLinks.getLinks();
+
+ // Create sites.
+ let numLinks = Math.min(links.length, cells.length);
+ let hasHistoryTiles = false;
+ for (let i = 0; i < numLinks; i++) {
+ if (links[i]) {
+ this.createSite(links[i], cells[i]);
+ if (links[i].type == "history") {
+ hasHistoryTiles = true;
+ }
+ }
+ }
+
+ this._cells = cells;
+ },
+
+ /**
+ * 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 placeholder"/>' +
+ ' <span class="newtab-thumbnail 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);
+ },
+
+ /**
+ * Test a tile at a given position for being pinned or history
+ * @param position Position in sites array
+ */
+ _isHistoricalTile: function Grid_isHistoricalTile(aPos) {
+ let site = this.sites[aPos];
+ return site && (site.isPinned() || site.link && site.link.type == "history");
+ }
+
+};