michael@0: #ifdef 0
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: #endif
michael@0: 
michael@0: /**
michael@0:  * This class manages a cell's DOM node (not the actually cell content, a site).
michael@0:  * It's mostly read-only, i.e. all manipulation of both position and content
michael@0:  * aren't handled here.
michael@0:  */
michael@0: function Cell(aGrid, aNode) {
michael@0:   this._grid = aGrid;
michael@0:   this._node = aNode;
michael@0:   this._node._newtabCell = this;
michael@0: 
michael@0:   // Register drag-and-drop event handlers.
michael@0:   ["dragenter", "dragover", "dragexit", "drop"].forEach(function (aType) {
michael@0:     this._node.addEventListener(aType, this, false);
michael@0:   }, this);
michael@0: }
michael@0: 
michael@0: Cell.prototype = {
michael@0:   /**
michael@0:    * The grid.
michael@0:    */
michael@0:   _grid: null,
michael@0: 
michael@0:   /**
michael@0:    * The cell's DOM node.
michael@0:    */
michael@0:   get node() this._node,
michael@0: 
michael@0:   /**
michael@0:    * The cell's offset in the grid.
michael@0:    */
michael@0:   get index() {
michael@0:     let index = this._grid.cells.indexOf(this);
michael@0: 
michael@0:     // Cache this value, overwrite the getter.
michael@0:     Object.defineProperty(this, "index", {value: index, enumerable: true});
michael@0: 
michael@0:     return index;
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * The previous cell in the grid.
michael@0:    */
michael@0:   get previousSibling() {
michael@0:     let prev = this.node.previousElementSibling;
michael@0:     prev = prev && prev._newtabCell;
michael@0: 
michael@0:     // Cache this value, overwrite the getter.
michael@0:     Object.defineProperty(this, "previousSibling", {value: prev, enumerable: true});
michael@0: 
michael@0:     return prev;
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * The next cell in the grid.
michael@0:    */
michael@0:   get nextSibling() {
michael@0:     let next = this.node.nextElementSibling;
michael@0:     next = next && next._newtabCell;
michael@0: 
michael@0:     // Cache this value, overwrite the getter.
michael@0:     Object.defineProperty(this, "nextSibling", {value: next, enumerable: true});
michael@0: 
michael@0:     return next;
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * The site contained in the cell, if any.
michael@0:    */
michael@0:   get site() {
michael@0:     let firstChild = this.node.firstElementChild;
michael@0:     return firstChild && firstChild._newtabSite;
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * Checks whether the cell contains a pinned site.
michael@0:    * @return Whether the cell contains a pinned site.
michael@0:    */
michael@0:   containsPinnedSite: function Cell_containsPinnedSite() {
michael@0:     let site = this.site;
michael@0:     return site && site.isPinned();
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * Checks whether the cell contains a site (is empty).
michael@0:    * @return Whether the cell is empty.
michael@0:    */
michael@0:   isEmpty: function Cell_isEmpty() {
michael@0:     return !this.site;
michael@0:   },
michael@0: 
michael@0:   /**
michael@0:    * Handles all cell events.
michael@0:    */
michael@0:   handleEvent: function Cell_handleEvent(aEvent) {
michael@0:     // We're not responding to external drag/drop events
michael@0:     // when our parent window is in private browsing mode.
michael@0:     if (inPrivateBrowsingMode() && !gDrag.draggedSite)
michael@0:       return;
michael@0: 
michael@0:     if (aEvent.type != "dragexit" && !gDrag.isValid(aEvent))
michael@0:       return;
michael@0: 
michael@0:     switch (aEvent.type) {
michael@0:       case "dragenter":
michael@0:         aEvent.preventDefault();
michael@0:         gDrop.enter(this, aEvent);
michael@0:         break;
michael@0:       case "dragover":
michael@0:         aEvent.preventDefault();
michael@0:         break;
michael@0:       case "dragexit":
michael@0:         gDrop.exit(this, aEvent);
michael@0:         break;
michael@0:       case "drop":
michael@0:         aEvent.preventDefault();
michael@0:         gDrop.drop(this, aEvent);
michael@0:         break;
michael@0:     }
michael@0:   }
michael@0: };