1 files changed, 175 insertions, 0 deletions
diff --git a/components/newtab/grid.js b/components/newtab/grid.js
new file mode 100644
index 0000000..e63ea54
--- /dev/null
+++ b/components/newtab/grid.js
@@ -0,0 +1,175 @@
+#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);
+    for (let i = 0; i < numLinks; i++) {
+      if (links[i]) {
+        this.createSite(links[i], cells[i]);
+      }
+    }
+
+    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");
+  }
+
+};