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estade@chromium.org |
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// Copyright (c) 2011 The Chromium Authors. All rights reserved. |
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// Use of this source code is governed by a BSD-style license that can be |
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// found in the LICENSE file. |
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cr.define('ntp4', function() { |
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'use strict'; |
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estade@chromium.org |
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// We can't pass the currently dragging tile via dataTransfer because of |
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// http://crbug.com/31037 |
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var currentlyDraggingTile = null; |
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function getCurrentlyDraggingTile() { |
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return currentlyDraggingTile; |
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} |
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estade@chromium.org |
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function setCurrentlyDraggingTile(tile) { |
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currentlyDraggingTile = tile; |
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if (tile) |
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ntp4.enterRearrangeMode(); |
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else |
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ntp4.leaveRearrangeMode(); |
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} |
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estade@chromium.org |
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|
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estade@chromium.org |
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/** |
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estade@chromium.org |
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* Creates a new Tile object. Tiles wrap content on a TilePage, providing |
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estade@chromium.org |
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* some styling and drag functionality. |
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* @constructor |
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* @extends {HTMLDivElement} |
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*/ |
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function Tile(contents) { |
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var tile = cr.doc.createElement('div'); |
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tile.__proto__ = Tile.prototype; |
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tile.initialize(contents); |
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return tile; |
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} |
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Tile.prototype = { |
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__proto__: HTMLDivElement.prototype, |
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initialize: function(contents) { |
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estade@chromium.org |
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// 'real' as opposed to doppleganger. |
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this.className = 'tile real'; |
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estade@chromium.org |
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this.appendChild(contents); |
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contents.tile = this; |
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this.addEventListener('dragstart', this.onDragStart_); |
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this.addEventListener('drag', this.onDragMove_); |
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this.addEventListener('dragend', this.onDragEnd_); |
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estade@chromium.org |
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|
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estade@chromium.org |
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this.firstChild.addEventListener( |
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'webkitAnimationEnd', this.onContentsAnimationEnd_.bind(this)); |
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estade@chromium.org |
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this.eventTracker = new EventTracker(); |
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estade@chromium.org |
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}, |
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get index() { |
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return Array.prototype.indexOf.call(this.parentNode.children, this); |
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}, |
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estade@chromium.org |
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get tilePage() { |
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return findAncestorByClass(this, 'tile-page'); |
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}, |
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estade@chromium.org |
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/** |
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* Position the tile at |x, y|, and store this as the grid location, i.e. |
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* where the tile 'belongs' when it's not being dragged. |
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* @param {number} x The x coordinate, in pixels. |
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* @param {number} y The y coordinate, in pixels. |
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*/ |
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setGridPosition: function(x, y) { |
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this.gridX = x; |
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this.gridY = y; |
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this.moveTo(x, y); |
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}, |
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/** |
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* Position the tile at |x, y|. |
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* @param {number} x The x coordinate, in pixels. |
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* @param {number} y The y coordinate, in pixels. |
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*/ |
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moveTo: function(x, y) { |
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estade@chromium.org |
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// left overrides right in LTR, and right takes precedence in RTL. |
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this.style.left = x + 'px'; |
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this.style.right = x + 'px'; |
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this.style.top = y + 'px'; |
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}, |
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/** |
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* The handler for dragstart events fired on |this|. |
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* @param {Event} e The event for the drag. |
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* @private |
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*/ |
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onDragStart_: function(e) { |
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estade@chromium.org |
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// The user may start dragging again during a previous drag's finishing |
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// animation. |
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if (this.classList.contains('dragging')) |
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this.finalizeDrag_(); |
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setCurrentlyDraggingTile(this); |
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|
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e.dataTransfer.effectAllowed = 'copyMove'; |
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this.firstChild.setDragData(e.dataTransfer); |
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estade@chromium.org |
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|
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estade@chromium.org |
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// The drag clone is the node we use as a representation during the drag. |
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// It's attached to the top level document element so that it floats above |
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// image masks. |
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this.dragClone = this.cloneNode(true); |
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estade@chromium.org |
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this.dragClone.style.right = ''; |
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estade@chromium.org |
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this.dragClone.classList.add('drag-representation'); |
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estade@chromium.org |
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$('card-slider-frame').appendChild(this.dragClone); |
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estade@chromium.org |
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this.eventTracker.add(this.dragClone, 'webkitTransitionEnd', |
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this.onDragCloneTransitionEnd_.bind(this)); |
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estade@chromium.org |
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this.classList.add('dragging'); |
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estade@chromium.org |
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// offsetLeft is mirrored in RTL. Un-mirror it. |
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var offsetLeft = ntp4.isRTL() ? |
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this.parentNode.clientWidth - this.offsetLeft : |
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this.offsetLeft; |
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this.dragOffsetX = e.x - offsetLeft - this.parentNode.offsetLeft; |
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estade@chromium.org |
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this.dragOffsetY = e.y - this.offsetTop - |
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estade@chromium.org |
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// Unlike offsetTop, this value takes scroll position into account. |
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this.parentNode.getBoundingClientRect().top; |
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estade@chromium.org |
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this.onDragMove_(e); |
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estade@chromium.org |
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}, |
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/** |
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* The handler for drag events fired on |this|. |
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* @param {Event} e The event for the drag. |
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* @private |
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*/ |
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onDragMove_: function(e) { |
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estade@chromium.org |
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if (e.view != window || (e.x == 0 && e.y == 0)) { |
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this.dragClone.hidden = true; |
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return; |
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} |
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estade@chromium.org |
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this.dragClone.hidden = false; |
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estade@chromium.org |
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this.dragClone.style.left = (e.x - this.dragOffsetX) + 'px'; |
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this.dragClone.style.top = (e.y - this.dragOffsetY) + 'px'; |
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estade@chromium.org |
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}, |
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/** |
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* The handler for dragend events fired on |this|. |
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* @param {Event} e The event for the drag. |
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* @private |
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*/ |
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onDragEnd_: function(e) { |
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this.dragClone.hidden = false; |
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estade@chromium.org |
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this.dragClone.classList.add('placing'); |
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estade@chromium.org |
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setCurrentlyDraggingTile(null); |
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estade@chromium.org |
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|
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estade@chromium.org |
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// tilePage will be null if we've already been removed. |
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dbeam@chromium.org |
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var tilePage = this.tilePage; |
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if (tilePage) |
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tilePage.positionTile_(this.index); |
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estade@chromium.org |
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// Take an appropriate action with the drag clone. |
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if (this.landedOnTrash) { |
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this.dragClone.classList.add('deleting'); |
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dbeam@chromium.org |
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} else if (tilePage) { |
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// TODO(dbeam): Until we fix dropEffect to the correct behavior it will |
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// differ on windows - crbug.com/39399. That's why we use the custom |
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// tilePage.lastDropEffect_ instead of e.dataTransfer.dropEffect. |
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if (tilePage.selected && tilePage.lastDropEffect_ != 'copy') { |
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// The drag clone can still be hidden from the last drag move event. |
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this.dragClone.hidden = false; |
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// The tile's contents may have moved following the respositioning; |
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// adjust for that. |
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var contentDiffX = this.dragClone.firstChild.offsetLeft - |
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this.firstChild.offsetLeft; |
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var contentDiffY = this.dragClone.firstChild.offsetTop - |
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this.firstChild.offsetTop; |
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this.dragClone.style.left = (this.gridX + this.parentNode.offsetLeft - |
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contentDiffX) + 'px'; |
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this.dragClone.style.top = |
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(this.gridY + this.parentNode.getBoundingClientRect().top - |
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contentDiffY) + 'px'; |
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estade@chromium.org |
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} else if (this.dragClone.hidden) { |
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this.finalizeDrag_(); |
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} else { |
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this.dragClone.classList.add('dropped-on-other-page'); |
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} |
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} |
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this.landedOnTrash = false; |
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estade@chromium.org |
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}, |
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estade@chromium.org |
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|
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/** |
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* Creates a clone of this node offset by the coordinates. Used for the |
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* dragging effect where a tile appears to float off one side of the grid |
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* and re-appear on the other. |
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* @param {number} x x-axis offset, in pixels. |
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* @param {number} y y-axis offset, in pixels. |
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*/ |
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showDoppleganger: function(x, y) { |
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// We always have to clear the previous doppleganger to make sure we get |
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// style updates for the contents of this tile. |
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this.clearDoppleganger(); |
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var clone = this.cloneNode(true); |
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clone.classList.remove('real'); |
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clone.classList.add('doppleganger'); |
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var clonelets = clone.querySelectorAll('.real'); |
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for (var i = 0; i < clonelets.length; i++) { |
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clonelets[i].classList.remove('real'); |
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} |
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this.appendChild(clone); |
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this.doppleganger_ = clone; |
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estade@chromium.org |
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if (ntp4.isRTL()) |
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x *= -1; |
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this.doppleganger_.style.WebkitTransform = 'translate(' + x + 'px, ' + |
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y + 'px)'; |
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}, |
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/** |
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* Destroys the current doppleganger. |
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*/ |
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clearDoppleganger: function() { |
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if (this.doppleganger_) { |
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this.removeChild(this.doppleganger_); |
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this.doppleganger_ = null; |
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} |
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}, |
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/** |
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estade@chromium.org |
84700 |
* Returns status of doppleganger. |
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* @return {boolean} True if there is a doppleganger showing for |this|. |
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*/ |
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hasDoppleganger: function() { |
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return !!this.doppleganger_; |
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}, |
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/** |
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estade@chromium.org |
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* Cleans up after the drag is over. This is either called when the |
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* drag representation finishes animating to the final position, or when |
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* the next drag starts (if the user starts a 2nd drag very quickly). |
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* @private |
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*/ |
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finalizeDrag_: function() { |
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assert(this.classList.contains('dragging')); |
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var clone = this.dragClone; |
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this.dragClone = null; |
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clone.parentNode.removeChild(clone); |
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this.eventTracker.remove(clone, 'webkitTransitionEnd'); |
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this.classList.remove('dragging'); |
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estade@chromium.org |
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if (this.firstChild.finalizeDrag) |
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this.firstChild.finalizeDrag(); |
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estade@chromium.org |
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}, |
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/** |
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estade@chromium.org |
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* Called when the drag representation node is done migrating to its final |
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* resting spot. |
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estade@chromium.org |
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* @param {Event} e The transition end event. |
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*/ |
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estade@chromium.org |
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onDragCloneTransitionEnd_: function(e) { |
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estade@chromium.org |
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if (this.classList.contains('dragging') && |
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(e.propertyName == 'left' || e.propertyName == 'top' || |
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e.propertyName == '-webkit-transform')) { |
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estade@chromium.org |
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this.finalizeDrag_(); |
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} |
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}, |
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|
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/** |
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* Called when an app is removed from Chrome. Animates its disappearance. |
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*/ |
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doRemove: function() { |
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this.firstChild.classList.add('removing-tile-contents'); |
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}, |
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/** |
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* Callback for the webkitAnimationEnd event on the tile's contents. |
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* @param {Event} e The event object. |
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*/ |
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onContentsAnimationEnd_: function(e) { |
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if (this.firstChild.classList.contains('new-tile-contents')) |
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this.firstChild.classList.remove('new-tile-contents'); |
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estade@chromium.org |
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if (this.firstChild.classList.contains('removing-tile-contents')) |
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estade@chromium.org |
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this.tilePage.removeTile(this); |
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estade@chromium.org |
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}, |
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estade@chromium.org |
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}; |
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/** |
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estade@chromium.org |
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* Gives the proportion of the row width that is devoted to a single icon. |
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* @param {number} rowTileCount The number of tiles in a row. |
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estade@chromium.org |
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* @param {number} tileSpacingFraction The proportion of the tile width which |
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* will be used as spacing between tiles. |
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estade@chromium.org |
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* @return {number} The ratio between icon width and row width. |
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*/ |
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estade@chromium.org |
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function tileWidthFraction(rowTileCount, tileSpacingFraction) { |
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return rowTileCount + (rowTileCount - 1) * tileSpacingFraction; |
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estade@chromium.org |
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} |
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/** |
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* Calculates an assortment of tile-related values for a grid with the |
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* given dimensions. |
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* @param {number} width The pixel width of the grid. |
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* @param {number} numRowTiles The number of tiles in a row. |
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estade@chromium.org |
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* @param {number} tileSpacingFraction The proportion of the tile width which |
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* will be used as spacing between tiles. |
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estade@chromium.org |
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* @return {Object} A mapping of pixel values. |
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*/ |
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estade@chromium.org |
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function tileValuesForGrid(width, numRowTiles, tileSpacingFraction) { |
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var tileWidth = width / tileWidthFraction(numRowTiles, tileSpacingFraction); |
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var offsetX = tileWidth * (1 + tileSpacingFraction); |
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estade@chromium.org |
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var interTileSpacing = offsetX - tileWidth; |
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estade@chromium.org |
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return { |
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tileWidth: tileWidth, |
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estade@chromium.org |
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offsetX: offsetX, |
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interTileSpacing: interTileSpacing, |
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estade@chromium.org |
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}; |
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} |
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// The smallest amount of horizontal blank space to display on the sides when |
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estade@chromium.org |
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// displaying a wide arrangement. There is an additional 26px of margin from |
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// the tile page padding. |
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var MIN_WIDE_MARGIN = 18; |
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estade@chromium.org |
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|
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/** |
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* Creates a new TilePage object. This object contains tiles and controls |
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* their layout. |
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* @param {Object} gridValues Pixel values that define the size and layout |
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* of the tile grid. |
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* @constructor |
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* @extends {HTMLDivElement} |
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*/ |
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csilv@chromium.org |
91883 |
function TilePage(gridValues) { |
334 |
estade@chromium.org |
81845 |
var el = cr.doc.createElement('div'); |
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el.gridValues_ = gridValues; |
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el.__proto__ = TilePage.prototype; |
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el.initialize(); |
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return el; |
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} |
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/** |
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* Takes a collection of grid layout pixel values and updates them with |
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* additional tiling values that are calculated from TilePage constants. |
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* @param {Object} grid The grid layout pixel values to update. |
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*/ |
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TilePage.initGridValues = function(grid) { |
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// The amount of space we need to display a narrow grid (all narrow grids |
349 |
|
|
// are this size). |
350 |
|
|
grid.narrowWidth = |
351 |
estade@chromium.org |
100105 |
grid.minTileWidth * tileWidthFraction(grid.minColCount, |
352 |
|
|
grid.tileSpacingFraction); |
353 |
estade@chromium.org |
81845 |
// The minimum amount of space we need to display a wide grid. |
354 |
|
|
grid.minWideWidth = |
355 |
estade@chromium.org |
100105 |
grid.minTileWidth * tileWidthFraction(grid.maxColCount, |
356 |
|
|
grid.tileSpacingFraction); |
357 |
estade@chromium.org |
81845 |
// The largest we will ever display a wide grid. |
358 |
|
|
grid.maxWideWidth = |
359 |
estade@chromium.org |
100105 |
grid.maxTileWidth * tileWidthFraction(grid.maxColCount, |
360 |
|
|
grid.tileSpacingFraction); |
361 |
estade@chromium.org |
81845 |
// Tile-related pixel values for the narrow display. |
362 |
|
|
grid.narrowTileValues = tileValuesForGrid(grid.narrowWidth, |
363 |
estade@chromium.org |
100105 |
grid.minColCount, |
364 |
|
|
grid.tileSpacingFraction); |
365 |
estade@chromium.org |
81845 |
// Tile-related pixel values for the minimum narrow display. |
366 |
|
|
grid.wideTileValues = tileValuesForGrid(grid.minWideWidth, |
367 |
estade@chromium.org |
100105 |
grid.maxColCount, |
368 |
|
|
grid.tileSpacingFraction); |
369 |
estade@chromium.org |
86638 |
}; |
370 |
estade@chromium.org |
81845 |
|
371 |
|
|
TilePage.prototype = { |
372 |
|
|
__proto__: HTMLDivElement.prototype, |
373 |
|
|
|
374 |
|
|
initialize: function() { |
375 |
|
|
this.className = 'tile-page'; |
376 |
|
|
|
377 |
estade@chromium.org |
91151 |
// Div that acts as a custom scrollbar. The scrollbar has to live |
378 |
|
|
// outside the content div so it doesn't flicker when scrolling (due to |
379 |
|
|
// repainting after the scroll, then repainting again when moved in the |
380 |
|
|
// onScroll handler). |scrollbar_| is only aesthetic, and it only |
381 |
|
|
// represents the thumb. Actual events are still handled by the invisible |
382 |
|
|
// native scrollbars. This div gives us more flexibility with the visuals. |
383 |
|
|
this.scrollbar_ = this.ownerDocument.createElement('div'); |
384 |
|
|
this.scrollbar_.className = 'tile-page-scrollbar'; |
385 |
|
|
this.scrollbar_.hidden = true; |
386 |
|
|
this.appendChild(this.scrollbar_); |
387 |
|
|
|
388 |
|
|
// This contains everything but the scrollbar. |
389 |
|
|
this.content_ = this.ownerDocument.createElement('div'); |
390 |
|
|
this.content_.className = 'tile-page-content'; |
391 |
|
|
this.appendChild(this.content_); |
392 |
|
|
|
393 |
estade@chromium.org |
85085 |
// Div that sets the vertical position of the tile grid. |
394 |
|
|
this.topMargin_ = this.ownerDocument.createElement('div'); |
395 |
|
|
this.topMargin_.className = 'top-margin'; |
396 |
estade@chromium.org |
91151 |
this.content_.appendChild(this.topMargin_); |
397 |
estade@chromium.org |
85085 |
|
398 |
estade@chromium.org |
81845 |
// Div that holds the tiles. |
399 |
|
|
this.tileGrid_ = this.ownerDocument.createElement('div'); |
400 |
|
|
this.tileGrid_.className = 'tile-grid'; |
401 |
estade@chromium.org |
100105 |
this.tileGrid_.style.minWidth = this.gridValues_.narrowWidth + 'px'; |
402 |
estade@chromium.org |
91151 |
this.content_.appendChild(this.tileGrid_); |
403 |
estade@chromium.org |
81845 |
|
404 |
|
|
// Ordered list of our tiles. |
405 |
estade@chromium.org |
83887 |
this.tileElements_ = this.tileGrid_.getElementsByClassName('tile real'); |
406 |
estade@chromium.org |
81845 |
|
407 |
estade@chromium.org |
85085 |
// These are properties used in updateTopMargin. |
408 |
|
|
this.animatedTopMarginPx_ = 0; |
409 |
|
|
this.topMarginPx_ = 0; |
410 |
estade@chromium.org |
81845 |
|
411 |
|
|
this.eventTracker = new EventTracker(); |
412 |
|
|
this.eventTracker.add(window, 'resize', this.onResize_.bind(this)); |
413 |
estade@chromium.org |
83385 |
|
414 |
estade@chromium.org |
87727 |
this.addEventListener('DOMNodeInsertedIntoDocument', |
415 |
estade@chromium.org |
89726 |
this.onNodeInsertedIntoDocument_); |
416 |
estade@chromium.org |
97929 |
|
417 |
|
|
this.addEventListener('mousewheel', this.onMouseWheel_); |
418 |
estade@chromium.org |
91151 |
this.content_.addEventListener('scroll', this.onScroll_.bind(this)); |
419 |
estade@chromium.org |
87727 |
|
420 |
estade@chromium.org |
93727 |
this.dragWrapper_ = new DragWrapper(this.tileGrid_, this); |
421 |
estade@chromium.org |
94375 |
|
422 |
|
|
$('page-list').addEventListener( |
423 |
|
|
CardSlider.EventType.CARD_CHANGED, |
424 |
|
|
this.onCardChanged.bind(this)); |
425 |
estade@chromium.org |
81845 |
}, |
426 |
|
|
|
427 |
csilv@chromium.org |
98657 |
get tiles() { |
428 |
|
|
return this.tileElements_; |
429 |
|
|
}, |
430 |
|
|
|
431 |
estade@chromium.org |
87727 |
get tileCount() { |
432 |
|
|
return this.tileElements_.length; |
433 |
|
|
}, |
434 |
|
|
|
435 |
estade@chromium.org |
89726 |
get selected() { |
436 |
|
|
return Array.prototype.indexOf.call(this.parentNode.children, this) == |
437 |
|
|
ntp4.getCardSlider().currentCard; |
438 |
|
|
}, |
439 |
|
|
|
440 |
estade@chromium.org |
81845 |
/** |
441 |
estade@chromium.org |
90992 |
* The size of the margin (unused space) on the sides of the tile grid, in |
442 |
|
|
* pixels. |
443 |
|
|
* @type {number} |
444 |
|
|
*/ |
445 |
|
|
get sideMargin() { |
446 |
|
|
return this.layoutValues_.leftMargin; |
447 |
|
|
}, |
448 |
|
|
|
449 |
|
|
/** |
450 |
estade@chromium.org |
91151 |
* Returns the width of the scrollbar, in pixels, if it is active, or 0 |
451 |
|
|
* otherwise. |
452 |
|
|
* @type {number} |
453 |
|
|
*/ |
454 |
|
|
get scrollbarWidth() { |
455 |
|
|
return this.scrollbar_.hidden ? 0 : 13; |
456 |
|
|
}, |
457 |
|
|
|
458 |
|
|
/** |
459 |
csilv@chromium.org |
99700 |
* Returns any extra padding to insert to the bottom of a tile page. By |
460 |
|
|
* default there is none, but subclasses can override. |
461 |
|
|
* @type {number} |
462 |
|
|
*/ |
463 |
|
|
get extraBottomPadding() { |
464 |
|
|
return 0; |
465 |
|
|
}, |
466 |
|
|
|
467 |
|
|
/** |
468 |
estade@chromium.org |
81845 |
* Cleans up resources that are no longer needed after this TilePage |
469 |
|
|
* instance is removed from the DOM. |
470 |
|
|
*/ |
471 |
|
|
tearDown: function() { |
472 |
|
|
this.eventTracker.removeAll(); |
473 |
|
|
}, |
474 |
|
|
|
475 |
|
|
/** |
476 |
estade@chromium.org |
91606 |
* Appends a tile to the end of the tile grid. |
477 |
|
|
* @param {HTMLElement} tileElement The contents of the tile. |
478 |
|
|
* @param {?boolean} animate If true, the append will be animated. |
479 |
estade@chromium.org |
81845 |
* @protected |
480 |
|
|
*/ |
481 |
estade@chromium.org |
91606 |
appendTile: function(tileElement, animate) { |
482 |
|
|
this.addTileAt(tileElement, this.tileElements_.length, animate); |
483 |
estade@chromium.org |
86184 |
}, |
484 |
estade@chromium.org |
85085 |
|
485 |
estade@chromium.org |
86184 |
/** |
486 |
|
|
* Adds the given element to the tile grid. |
487 |
|
|
* @param {Node} tileElement The tile object/node to insert. |
488 |
|
|
* @param {number} index The location in the tile grid to insert it at. |
489 |
estade@chromium.org |
91735 |
* @param {?boolean} animate If true, the tile in question will be animated |
490 |
|
|
* (other tiles, if they must reposition, do not animate). |
491 |
estade@chromium.org |
86184 |
* @protected |
492 |
|
|
*/ |
493 |
estade@chromium.org |
91606 |
addTileAt: function(tileElement, index, animate) { |
494 |
|
|
this.classList.remove('animating-tile-page'); |
495 |
|
|
if (animate) |
496 |
|
|
tileElement.classList.add('new-tile-contents'); |
497 |
estade@chromium.org |
83385 |
var wrapperDiv = new Tile(tileElement); |
498 |
estade@chromium.org |
86184 |
if (index == this.tileElements_.length) { |
499 |
|
|
this.tileGrid_.appendChild(wrapperDiv); |
500 |
|
|
} else { |
501 |
|
|
this.tileGrid_.insertBefore(wrapperDiv, |
502 |
|
|
this.tileElements_[index]); |
503 |
|
|
} |
504 |
|
|
this.calculateLayoutValues_(); |
505 |
csilv@chromium.org |
99700 |
this.heightChanged_(); |
506 |
estade@chromium.org |
81845 |
|
507 |
estade@chromium.org |
86184 |
this.positionTile_(index); |
508 |
estade@chromium.org |
81845 |
}, |
509 |
|
|
|
510 |
|
|
/** |
511 |
estade@chromium.org |
91735 |
* Removes the given tile and animates the respositioning of the other |
512 |
|
|
* tiles. |
513 |
|
|
* @param {HTMLElement} tile The tile to remove from |tileGrid_|. |
514 |
csilv@chromium.org |
98657 |
* @param {?boolean} animate If true, tiles will animate. |
515 |
estade@chromium.org |
91735 |
*/ |
516 |
csilv@chromium.org |
98657 |
removeTile: function(tile, animate) { |
517 |
|
|
if (animate) |
518 |
|
|
this.classList.add('animating-tile-page'); |
519 |
dbeam@chromium.org |
99701 |
var index = tile.index; |
520 |
estade@chromium.org |
91735 |
tile.parentNode.removeChild(tile); |
521 |
|
|
this.calculateLayoutValues_(); |
522 |
|
|
for (var i = index; i < this.tileElements_.length; i++) { |
523 |
|
|
this.positionTile_(i); |
524 |
|
|
} |
525 |
|
|
}, |
526 |
|
|
|
527 |
|
|
/** |
528 |
csilv@chromium.org |
96867 |
* Removes all tiles from the page. |
529 |
|
|
*/ |
530 |
|
|
removeAllTiles: function() { |
531 |
|
|
this.tileGrid_.innerHTML = ''; |
532 |
|
|
}, |
533 |
|
|
|
534 |
|
|
/** |
535 |
estade@chromium.org |
85085 |
* Makes some calculations for tile layout. These change depending on |
536 |
|
|
* height, width, and the number of tiles. |
537 |
estade@chromium.org |
94375 |
* TODO(estade): optimize calls to this function. Do nothing if the page is |
538 |
|
|
* hidden, but call before being shown. |
539 |
estade@chromium.org |
81845 |
* @private |
540 |
|
|
*/ |
541 |
estade@chromium.org |
83385 |
calculateLayoutValues_: function() { |
542 |
estade@chromium.org |
81845 |
var grid = this.gridValues_; |
543 |
|
|
var availableSpace = this.tileGrid_.clientWidth - 2 * MIN_WIDE_MARGIN; |
544 |
|
|
var wide = availableSpace >= grid.minWideWidth; |
545 |
|
|
var numRowTiles = wide ? grid.maxColCount : grid.minColCount; |
546 |
|
|
|
547 |
|
|
var effectiveGridWidth = wide ? |
548 |
|
|
Math.min(Math.max(availableSpace, grid.minWideWidth), |
549 |
|
|
grid.maxWideWidth) : |
550 |
|
|
grid.narrowWidth; |
551 |
estade@chromium.org |
100105 |
var realTileValues = tileValuesForGrid(effectiveGridWidth, numRowTiles, |
552 |
|
|
grid.tileSpacingFraction); |
553 |
estade@chromium.org |
83385 |
|
554 |
estade@chromium.org |
81845 |
// leftMargin centers the grid within the avaiable space. |
555 |
|
|
var minMargin = wide ? MIN_WIDE_MARGIN : 0; |
556 |
|
|
var leftMargin = |
557 |
|
|
Math.max(minMargin, |
558 |
|
|
(this.tileGrid_.clientWidth - effectiveGridWidth) / 2); |
559 |
estade@chromium.org |
85085 |
|
560 |
|
|
var rowHeight = this.heightForWidth(realTileValues.tileWidth) + |
561 |
|
|
realTileValues.interTileSpacing; |
562 |
|
|
|
563 |
|
|
this.layoutValues_ = { |
564 |
estade@chromium.org |
83385 |
numRowTiles: numRowTiles, |
565 |
|
|
leftMargin: leftMargin, |
566 |
|
|
colWidth: realTileValues.offsetX, |
567 |
estade@chromium.org |
85085 |
rowHeight: rowHeight, |
568 |
estade@chromium.org |
83385 |
tileWidth: realTileValues.tileWidth, |
569 |
|
|
wide: wide, |
570 |
|
|
}; |
571 |
estade@chromium.org |
85085 |
|
572 |
|
|
// We need to update the top margin as well. |
573 |
|
|
this.updateTopMargin_(); |
574 |
estade@chromium.org |
97929 |
|
575 |
|
|
this.firePageLayoutEvent_(); |
576 |
estade@chromium.org |
83385 |
}, |
577 |
estade@chromium.org |
81845 |
|
578 |
estade@chromium.org |
83385 |
/** |
579 |
estade@chromium.org |
97929 |
* Dispatches the custom pagelayout event. |
580 |
|
|
* @private |
581 |
estade@chromium.org |
90992 |
*/ |
582 |
estade@chromium.org |
97929 |
firePageLayoutEvent_: function() { |
583 |
|
|
cr.dispatchSimpleEvent(this, 'pagelayout', true, true); |
584 |
estade@chromium.org |
90992 |
}, |
585 |
|
|
|
586 |
|
|
/** |
587 |
estade@chromium.org |
83385 |
* Calculates the x/y coordinates for an element and moves it there. |
588 |
|
|
* @param {number} index The index of the element to be positioned. |
589 |
|
|
* @param {number} indexOffset If provided, this is added to |index| when |
590 |
|
|
* positioning the tile. The effect is that the tile will be positioned |
591 |
|
|
* in a non-default location. |
592 |
|
|
* @private |
593 |
|
|
*/ |
594 |
|
|
positionTile_: function(index, indexOffset) { |
595 |
|
|
var grid = this.gridValues_; |
596 |
estade@chromium.org |
85085 |
var layout = this.layoutValues_; |
597 |
estade@chromium.org |
83385 |
|
598 |
|
|
indexOffset = typeof indexOffset != 'undefined' ? indexOffset : 0; |
599 |
estade@chromium.org |
83887 |
// Add the offset _after_ the modulus division. We might want to show the |
600 |
|
|
// tile off the side of the grid. |
601 |
|
|
var col = index % layout.numRowTiles + indexOffset; |
602 |
|
|
var row = Math.floor(index / layout.numRowTiles); |
603 |
estade@chromium.org |
83385 |
// Calculate the final on-screen position for the tile. |
604 |
|
|
var realX = col * layout.colWidth + layout.leftMargin; |
605 |
|
|
var realY = row * layout.rowHeight; |
606 |
|
|
|
607 |
|
|
// Calculate the portion of the tile's position that should be animated. |
608 |
|
|
var animatedTileValues = layout.wide ? |
609 |
|
|
grid.wideTileValues : grid.narrowTileValues; |
610 |
|
|
// Animate the difference between three-wide and six-wide. |
611 |
|
|
var animatedLeftMargin = layout.wide ? |
612 |
|
|
0 : (grid.minWideWidth - MIN_WIDE_MARGIN - grid.narrowWidth) / 2; |
613 |
|
|
var animatedX = col * animatedTileValues.offsetX + animatedLeftMargin; |
614 |
|
|
var animatedY = row * (this.heightForWidth(animatedTileValues.tileWidth) + |
615 |
|
|
animatedTileValues.interTileSpacing); |
616 |
|
|
|
617 |
|
|
var tile = this.tileElements_[index]; |
618 |
|
|
tile.setGridPosition(animatedX, animatedY); |
619 |
|
|
tile.firstChild.setBounds(layout.tileWidth, |
620 |
|
|
realX - animatedX, |
621 |
|
|
realY - animatedY); |
622 |
estade@chromium.org |
83887 |
|
623 |
|
|
// This code calculates whether the tile needs to show a clone of itself |
624 |
|
|
// wrapped around the other side of the tile grid. |
625 |
estade@chromium.org |
84700 |
var offTheRight = col == layout.numRowTiles || |
626 |
|
|
(col == layout.numRowTiles - 1 && tile.hasDoppleganger()); |
627 |
|
|
var offTheLeft = col == -1 || (col == 0 && tile.hasDoppleganger()); |
628 |
estade@chromium.org |
93727 |
if (this.isCurrentDragTarget && (offTheRight || offTheLeft)) { |
629 |
estade@chromium.org |
83887 |
var sign = offTheRight ? 1 : -1; |
630 |
|
|
tile.showDoppleganger(-layout.numRowTiles * layout.colWidth * sign, |
631 |
|
|
layout.rowHeight * sign); |
632 |
|
|
} else { |
633 |
|
|
tile.clearDoppleganger(); |
634 |
|
|
} |
635 |
estade@chromium.org |
87875 |
|
636 |
estade@chromium.org |
91151 |
if (index == this.tileElements_.length - 1) { |
637 |
estade@chromium.org |
87875 |
this.tileGrid_.style.height = (realY + layout.rowHeight) + 'px'; |
638 |
estade@chromium.org |
91151 |
this.queueUpdateScrollbars_(); |
639 |
|
|
} |
640 |
estade@chromium.org |
81845 |
}, |
641 |
|
|
|
642 |
|
|
/** |
643 |
estade@chromium.org |
83385 |
* Gets the index of the tile that should occupy coordinate (x, y). Note |
644 |
|
|
* that this function doesn't care where the tiles actually are, and will |
645 |
|
|
* return an index even for the space between two tiles. This function is |
646 |
|
|
* effectively the inverse of |positionTile_|. |
647 |
estade@chromium.org |
96628 |
* @param {number} x The x coordinate, in pixels, relative to the left of |
648 |
|
|
* |this|. |
649 |
|
|
* @param {number} y The y coordinate, in pixels, relative to the top of |
650 |
|
|
* |this|. |
651 |
estade@chromium.org |
83385 |
* @private |
652 |
|
|
*/ |
653 |
|
|
getWouldBeIndexForPoint_: function(x, y) { |
654 |
|
|
var grid = this.gridValues_; |
655 |
estade@chromium.org |
85085 |
var layout = this.layoutValues_; |
656 |
estade@chromium.org |
83385 |
|
657 |
estade@chromium.org |
96628 |
var gridClientRect = this.tileGrid_.getBoundingClientRect(); |
658 |
|
|
var col = Math.floor((x - gridClientRect.left - layout.leftMargin) / |
659 |
|
|
layout.colWidth); |
660 |
estade@chromium.org |
83887 |
if (col < 0 || col >= layout.numRowTiles) |
661 |
|
|
return -1; |
662 |
|
|
|
663 |
estade@chromium.org |
92404 |
if (ntp4.isRTL()) |
664 |
|
|
col = layout.numRowTiles - 1 - col; |
665 |
|
|
|
666 |
estade@chromium.org |
96628 |
var row = Math.floor((y - gridClientRect.top) / layout.rowHeight); |
667 |
estade@chromium.org |
83385 |
return row * layout.numRowTiles + col; |
668 |
|
|
}, |
669 |
|
|
|
670 |
|
|
/** |
671 |
estade@chromium.org |
81845 |
* Window resize event handler. Window resizes may trigger re-layouts. |
672 |
|
|
* @param {Object} e The resize event. |
673 |
|
|
*/ |
674 |
|
|
onResize_: function(e) { |
675 |
estade@chromium.org |
85085 |
if (this.lastWidth_ == this.clientWidth && |
676 |
|
|
this.lastHeight_ == this.clientHeight) { |
677 |
estade@chromium.org |
81845 |
return; |
678 |
estade@chromium.org |
85085 |
} |
679 |
estade@chromium.org |
81845 |
|
680 |
estade@chromium.org |
85085 |
this.calculateLayoutValues_(); |
681 |
|
|
|
682 |
|
|
this.lastWidth_ = this.clientWidth; |
683 |
|
|
this.lastHeight_ = this.clientHeight; |
684 |
estade@chromium.org |
83385 |
this.classList.add('animating-tile-page'); |
685 |
estade@chromium.org |
89726 |
this.heightChanged_(); |
686 |
estade@chromium.org |
81845 |
|
687 |
dbeam@chromium.org |
99701 |
this.repositionTiles_(); |
688 |
estade@chromium.org |
81845 |
}, |
689 |
estade@chromium.org |
82146 |
|
690 |
|
|
/** |
691 |
estade@chromium.org |
85085 |
* The tile grid has an image mask which fades at the edges. We only show |
692 |
|
|
* the mask when there is an active drag; it obscures doppleganger tiles |
693 |
|
|
* as they enter or exit the grid. |
694 |
|
|
* @private |
695 |
estade@chromium.org |
83887 |
*/ |
696 |
|
|
updateMask_: function() { |
697 |
estade@chromium.org |
93727 |
if (!this.isCurrentDragTarget) { |
698 |
estade@chromium.org |
87875 |
this.tileGrid_.style.WebkitMaskBoxImage = ''; |
699 |
estade@chromium.org |
83887 |
return; |
700 |
estade@chromium.org |
85085 |
} |
701 |
estade@chromium.org |
83887 |
|
702 |
estade@chromium.org |
85085 |
var leftMargin = this.layoutValues_.leftMargin; |
703 |
estade@chromium.org |
88689 |
var fadeDistance = Math.min(leftMargin, 20); |
704 |
estade@chromium.org |
83887 |
var gradient = |
705 |
|
|
'-webkit-linear-gradient(left,' + |
706 |
|
|
'transparent, ' + |
707 |
|
|
'transparent ' + (leftMargin - fadeDistance) + 'px, ' + |
708 |
|
|
'black ' + leftMargin + 'px, ' + |
709 |
estade@chromium.org |
88689 |
'black ' + (this.tileGrid_.clientWidth - leftMargin) + 'px, ' + |
710 |
|
|
'transparent ' + (this.tileGrid_.clientWidth - leftMargin + |
711 |
|
|
fadeDistance) + 'px, ' + |
712 |
estade@chromium.org |
83887 |
'transparent)'; |
713 |
estade@chromium.org |
87875 |
this.tileGrid_.style.WebkitMaskBoxImage = gradient; |
714 |
estade@chromium.org |
83887 |
}, |
715 |
|
|
|
716 |
estade@chromium.org |
85085 |
updateTopMargin_: function() { |
717 |
|
|
var layout = this.layoutValues_; |
718 |
|
|
|
719 |
|
|
// The top margin is set so that the vertical midpoint of the grid will |
720 |
|
|
// be 1/3 down the page. |
721 |
estade@chromium.org |
87727 |
var numTiles = this.tileCount + |
722 |
estade@chromium.org |
93727 |
(this.isCurrentDragTarget && !this.withinPageDrag_ ? 1 : 0); |
723 |
estade@chromium.org |
87727 |
var numRows = Math.ceil(numTiles / layout.numRowTiles); |
724 |
estade@chromium.org |
85085 |
var usedHeight = layout.rowHeight * numRows; |
725 |
|
|
// 100 matches the top padding of tile-page. |
726 |
|
|
var newMargin = document.documentElement.clientHeight / 3 - |
727 |
csilv@chromium.org |
99485 |
usedHeight / 2 - 100 - this.content_.offsetTop; |
728 |
estade@chromium.org |
85085 |
newMargin = Math.max(newMargin, 0); |
729 |
|
|
|
730 |
|
|
// |newMargin| is the final margin we actually want to show. However, |
731 |
|
|
// part of that should be animated and part should not (for the same |
732 |
|
|
// reason as with leftMargin). The approach is to consider differences |
733 |
|
|
// when the layout changes from wide to narrow or vice versa as |
734 |
|
|
// 'animatable'. These differences accumulate in animatedTopMarginPx_, |
735 |
|
|
// while topMarginPx_ caches the real (total) margin. Either of these |
736 |
|
|
// calculations may come out to be negative, so we use margins as the |
737 |
|
|
// css property. |
738 |
|
|
|
739 |
|
|
if (typeof this.topMarginIsForWide_ == 'undefined') |
740 |
|
|
this.topMarginIsForWide_ = layout.wide; |
741 |
|
|
if (this.topMarginIsForWide_ != layout.wide) { |
742 |
|
|
this.animatedTopMarginPx_ += newMargin - this.topMarginPx_; |
743 |
|
|
this.topMargin_.style.marginBottom = |
744 |
|
|
this.animatedTopMarginPx_ + 'px'; |
745 |
|
|
} |
746 |
|
|
|
747 |
|
|
this.topMarginIsForWide_ = layout.wide; |
748 |
|
|
this.topMarginPx_ = newMargin; |
749 |
|
|
this.topMargin_.style.marginTop = |
750 |
|
|
(this.topMarginPx_ - this.animatedTopMarginPx_) + 'px'; |
751 |
|
|
}, |
752 |
|
|
|
753 |
estade@chromium.org |
83887 |
/** |
754 |
estade@chromium.org |
89726 |
* Handles final setup that can only happen after |this| is inserted into |
755 |
|
|
* the page. |
756 |
estade@chromium.org |
97929 |
* @private |
757 |
estade@chromium.org |
89726 |
*/ |
758 |
|
|
onNodeInsertedIntoDocument_: function(e) { |
759 |
|
|
this.calculateLayoutValues_(); |
760 |
|
|
this.heightChanged_(); |
761 |
|
|
}, |
762 |
|
|
|
763 |
|
|
/** |
764 |
|
|
* Called when the height of |this| has changed: update the size of |
765 |
|
|
* tileGrid. |
766 |
estade@chromium.org |
97929 |
* @private |
767 |
estade@chromium.org |
89726 |
*/ |
768 |
|
|
heightChanged_: function() { |
769 |
|
|
// The tile grid will expand to the bottom footer, or enough to hold all |
770 |
|
|
// the tiles, whichever is greater. It would be nicer if tilePage were |
771 |
|
|
// a flex box, and the tile grid could be box-flex: 1, but this exposes a |
772 |
|
|
// bug where repositioning tiles will cause the scroll position to reset. |
773 |
|
|
this.tileGrid_.style.minHeight = (this.clientHeight - |
774 |
csilv@chromium.org |
99700 |
this.tileGrid_.offsetTop - this.content_.offsetTop - |
775 |
|
|
this.extraBottomPadding) + 'px'; |
776 |
estade@chromium.org |
89726 |
}, |
777 |
|
|
|
778 |
|
|
/** |
779 |
estade@chromium.org |
97929 |
* Scrolls the page in response to a mousewheel event. |
780 |
|
|
* @param {Event} e The mousewheel event. |
781 |
estade@chromium.org |
91151 |
*/ |
782 |
estade@chromium.org |
97929 |
handleMouseWheel: function(e) { |
783 |
|
|
this.content_.scrollTop -= e.wheelDeltaY / 3; |
784 |
estade@chromium.org |
91151 |
}, |
785 |
|
|
|
786 |
|
|
/** |
787 |
estade@chromium.org |
97929 |
* Handles mouse wheels on |this|. We handle this explicitly because we want |
788 |
|
|
* a consistent experience whether the user scrolls on the page or on the |
789 |
|
|
* page switcher (handleMouseWheel provides a common conversion factor |
790 |
|
|
* between wheel delta and scroll delta). |
791 |
|
|
* @param {Event} e The mousewheel event. |
792 |
|
|
* @private |
793 |
|
|
*/ |
794 |
|
|
onMouseWheel_: function(e) { |
795 |
|
|
if (e.wheelDeltaY == 0) |
796 |
|
|
return; |
797 |
|
|
|
798 |
|
|
this.handleMouseWheel(e); |
799 |
|
|
e.preventDefault(); |
800 |
|
|
e.stopPropagation(); |
801 |
|
|
}, |
802 |
|
|
|
803 |
|
|
/** |
804 |
estade@chromium.org |
91151 |
* Handler for the 'scroll' event on |content_|. |
805 |
|
|
* @param {Event} e The scroll event. |
806 |
estade@chromium.org |
97929 |
* @private |
807 |
estade@chromium.org |
91151 |
*/ |
808 |
|
|
onScroll_: function(e) { |
809 |
|
|
this.queueUpdateScrollbars_(); |
810 |
|
|
}, |
811 |
|
|
|
812 |
|
|
/** |
813 |
|
|
* ID of scrollbar update timer. If 0, there's no scrollbar re-calc queued. |
814 |
estade@chromium.org |
97929 |
* @private |
815 |
estade@chromium.org |
91151 |
*/ |
816 |
|
|
scrollbarUpdate_: 0, |
817 |
|
|
|
818 |
|
|
/** |
819 |
|
|
* Queues an update on the custom scrollbar. Used for two reasons: first, |
820 |
|
|
* coalescing of multiple updates, and second, because action like |
821 |
|
|
* repositioning a tile can require a delay before they affect values |
822 |
|
|
* like clientHeight. |
823 |
estade@chromium.org |
97929 |
* @private |
824 |
estade@chromium.org |
91151 |
*/ |
825 |
|
|
queueUpdateScrollbars_: function() { |
826 |
|
|
if (this.scrollbarUpdate_) |
827 |
|
|
return; |
828 |
|
|
|
829 |
|
|
this.scrollbarUpdate_ = window.setTimeout( |
830 |
|
|
this.doUpdateScrollbars_.bind(this), 0); |
831 |
|
|
}, |
832 |
|
|
|
833 |
|
|
/** |
834 |
|
|
* Does the work of calculating the visibility, height and position of the |
835 |
|
|
* scrollbar thumb (there is no track or buttons). |
836 |
estade@chromium.org |
97929 |
* @private |
837 |
estade@chromium.org |
91151 |
*/ |
838 |
|
|
doUpdateScrollbars_: function() { |
839 |
|
|
this.scrollbarUpdate_ = 0; |
840 |
|
|
|
841 |
|
|
var content = this.content_; |
842 |
csilv@chromium.org |
96895 |
|
843 |
csilv@chromium.org |
99485 |
// Adjust scroll-height to account for possible header-bar. |
844 |
|
|
var adjustedScrollHeight = content.scrollHeight - content.offsetTop; |
845 |
csilv@chromium.org |
96895 |
|
846 |
csilv@chromium.org |
99485 |
if (adjustedScrollHeight <= content.clientHeight) { |
847 |
estade@chromium.org |
91151 |
this.scrollbar_.hidden = true; |
848 |
|
|
return; |
849 |
|
|
} else { |
850 |
|
|
this.scrollbar_.hidden = false; |
851 |
|
|
} |
852 |
|
|
|
853 |
csilv@chromium.org |
96895 |
var thumbTop = content.offsetTop + |
854 |
csilv@chromium.org |
99485 |
content.scrollTop / adjustedScrollHeight * content.clientHeight; |
855 |
|
|
var thumbHeight = content.clientHeight / adjustedScrollHeight * |
856 |
estade@chromium.org |
91151 |
this.clientHeight; |
857 |
|
|
|
858 |
|
|
this.scrollbar_.style.top = thumbTop + 'px'; |
859 |
|
|
this.scrollbar_.style.height = thumbHeight + 'px'; |
860 |
estade@chromium.org |
97929 |
this.firePageLayoutEvent_(); |
861 |
estade@chromium.org |
91151 |
}, |
862 |
|
|
|
863 |
|
|
/** |
864 |
estade@chromium.org |
82146 |
* Get the height for a tile of a certain width. Override this function to |
865 |
|
|
* get non-square tiles. |
866 |
|
|
* @param {number} width The pixel width of a tile. |
867 |
|
|
* @return {number} The height for |width|. |
868 |
|
|
*/ |
869 |
|
|
heightForWidth: function(width) { |
870 |
|
|
return width; |
871 |
|
|
}, |
872 |
estade@chromium.org |
83385 |
|
873 |
estade@chromium.org |
94375 |
/** |
874 |
|
|
* Handle for CARD_CHANGED. |
875 |
|
|
* @param {Event} e The card slider event. |
876 |
|
|
*/ |
877 |
|
|
onCardChanged: function(e) { |
878 |
|
|
// When we are selected, we re-calculate the layout values. (See comment |
879 |
|
|
// in doDrop.) |
880 |
|
|
if (e.cardSlider.currentCardValue == this) |
881 |
|
|
this.calculateLayoutValues_(); |
882 |
|
|
}, |
883 |
|
|
|
884 |
estade@chromium.org |
83385 |
/** Dragging **/ |
885 |
|
|
|
886 |
estade@chromium.org |
93727 |
get isCurrentDragTarget() { |
887 |
|
|
return this.dragWrapper_.isCurrentDragTarget; |
888 |
estade@chromium.org |
86184 |
}, |
889 |
estade@chromium.org |
83385 |
|
890 |
estade@chromium.org |
86184 |
/** |
891 |
|
|
* Thunk for dragleave events fired on |tileGrid_|. |
892 |
|
|
* @param {Event} e A MouseEvent for the drag. |
893 |
|
|
*/ |
894 |
estade@chromium.org |
93727 |
doDragLeave: function(e) { |
895 |
|
|
this.cleanupDrag(); |
896 |
estade@chromium.org |
86184 |
}, |
897 |
|
|
|
898 |
|
|
/** |
899 |
|
|
* Performs all actions necessary when a drag enters the tile page. |
900 |
|
|
* @param {Event} e A mouseover event for the drag enter. |
901 |
|
|
*/ |
902 |
estade@chromium.org |
93727 |
doDragEnter: function(e) { |
903 |
estade@chromium.org |
86184 |
|
904 |
estade@chromium.org |
85085 |
// Applies the mask so doppleganger tiles disappear into the fog. |
905 |
|
|
this.updateMask_(); |
906 |
|
|
|
907 |
estade@chromium.org |
83385 |
this.classList.add('animating-tile-page'); |
908 |
estade@chromium.org |
86638 |
this.withinPageDrag_ = this.contains(currentlyDraggingTile); |
909 |
estade@chromium.org |
84700 |
this.dragItemIndex_ = this.withinPageDrag_ ? |
910 |
estade@chromium.org |
86638 |
currentlyDraggingTile.index : this.tileElements_.length; |
911 |
estade@chromium.org |
83385 |
this.currentDropIndex_ = this.dragItemIndex_; |
912 |
estade@chromium.org |
87727 |
|
913 |
|
|
// The new tile may change the number of rows, hence the top margin |
914 |
|
|
// will change. |
915 |
|
|
if (!this.withinPageDrag_) |
916 |
|
|
this.updateTopMargin_(); |
917 |
estade@chromium.org |
89726 |
|
918 |
estade@chromium.org |
93727 |
this.doDragOver(e); |
919 |
estade@chromium.org |
83385 |
}, |
920 |
|
|
|
921 |
|
|
/** |
922 |
estade@chromium.org |
86184 |
* Performs all actions necessary when the user moves the cursor during |
923 |
|
|
* a drag over the tile page. |
924 |
|
|
* @param {Event} e A mouseover event for the drag over. |
925 |
estade@chromium.org |
83385 |
*/ |
926 |
estade@chromium.org |
93727 |
doDragOver: function(e) { |
927 |
estade@chromium.org |
83385 |
e.preventDefault(); |
928 |
|
|
|
929 |
estade@chromium.org |
98342 |
this.setDropEffect(e.dataTransfer); |
930 |
estade@chromium.org |
87875 |
var newDragIndex = this.getWouldBeIndexForPoint_(e.pageX, e.pageY); |
931 |
estade@chromium.org |
83385 |
if (newDragIndex < 0 || newDragIndex >= this.tileElements_.length) |
932 |
|
|
newDragIndex = this.dragItemIndex_; |
933 |
|
|
this.updateDropIndicator_(newDragIndex); |
934 |
dbeam@chromium.org |
101031 |
|
935 |
|
|
this.lastDropEffect_ = e.dataTransfer.dropEffect; |
936 |
estade@chromium.org |
83385 |
}, |
937 |
|
|
|
938 |
|
|
/** |
939 |
estade@chromium.org |
86184 |
* Performs all actions necessary when the user completes a drop. |
940 |
|
|
* @param {Event} e A mouseover event for the drag drop. |
941 |
estade@chromium.org |
83385 |
*/ |
942 |
estade@chromium.org |
93727 |
doDrop: function(e) { |
943 |
estade@chromium.org |
83887 |
e.stopPropagation(); |
944 |
|
|
|
945 |
estade@chromium.org |
83385 |
var index = this.currentDropIndex_; |
946 |
estade@chromium.org |
86373 |
// Only change data if this was not a 'null drag'. |
947 |
|
|
if (!((index == this.dragItemIndex_) && this.withinPageDrag_)) { |
948 |
|
|
var adjustedIndex = this.currentDropIndex_ + |
949 |
|
|
(index > this.dragItemIndex_ ? 1 : 0); |
950 |
estade@chromium.org |
95856 |
if (this.withinPageDrag_) { |
951 |
estade@chromium.org |
86373 |
this.tileGrid_.insertBefore( |
952 |
estade@chromium.org |
86638 |
currentlyDraggingTile, |
953 |
estade@chromium.org |
86373 |
this.tileElements_[adjustedIndex]); |
954 |
dbeam@chromium.org |
99701 |
this.tileMoved(currentlyDraggingTile, this.dragItemIndex_); |
955 |
estade@chromium.org |
86373 |
} else { |
956 |
estade@chromium.org |
97929 |
var originalPage = currentlyDraggingTile ? |
957 |
|
|
currentlyDraggingTile.tilePage : null; |
958 |
estade@chromium.org |
95856 |
this.addDragData(e.dataTransfer, adjustedIndex); |
959 |
estade@chromium.org |
97929 |
if (originalPage) |
960 |
|
|
originalPage.cleanupDrag(); |
961 |
estade@chromium.org |
86373 |
} |
962 |
estade@chromium.org |
95856 |
|
963 |
|
|
// Dropping the icon may cause topMargin to change, but changing it |
964 |
|
|
// now would cause everything to move (annoying), so we leave it |
965 |
|
|
// alone. The top margin will be re-calculated next time the window is |
966 |
|
|
// resized or the page is selected. |
967 |
estade@chromium.org |
86184 |
} |
968 |
estade@chromium.org |
83385 |
|
969 |
estade@chromium.org |
86184 |
this.classList.remove('animating-tile-page'); |
970 |
estade@chromium.org |
93727 |
this.cleanupDrag(); |
971 |
estade@chromium.org |
83385 |
}, |
972 |
|
|
|
973 |
|
|
/** |
974 |
estade@chromium.org |
93262 |
* Appends the currently dragged tile to the end of the page. Called |
975 |
|
|
* from outside the page, e.g. when dropping on a nav dot. |
976 |
|
|
*/ |
977 |
|
|
appendDraggingTile: function() { |
978 |
|
|
var originalPage = currentlyDraggingTile.tilePage; |
979 |
|
|
if (originalPage == this) |
980 |
|
|
return; |
981 |
|
|
|
982 |
estade@chromium.org |
96688 |
this.addDragData(null, this.tileElements_.length); |
983 |
estade@chromium.org |
93727 |
originalPage.cleanupDrag(); |
984 |
estade@chromium.org |
93262 |
}, |
985 |
|
|
|
986 |
|
|
/** |
987 |
estade@chromium.org |
83887 |
* Makes sure all the tiles are in the right place after a drag is over. |
988 |
|
|
*/ |
989 |
estade@chromium.org |
93727 |
cleanupDrag: function() { |
990 |
dbeam@chromium.org |
99701 |
this.repositionTiles_(currentlyDraggingTile); |
991 |
estade@chromium.org |
85085 |
// Remove the drag mask. |
992 |
|
|
this.updateMask_(); |
993 |
estade@chromium.org |
83887 |
}, |
994 |
|
|
|
995 |
|
|
/** |
996 |
dbeam@chromium.org |
99701 |
* Reposition all the tiles (possibly ignoring one). |
997 |
|
|
* @param {Node} ignoreNode An optional node to ignore. |
998 |
|
|
* @private |
999 |
|
|
*/ |
1000 |
|
|
repositionTiles_: function(ignoreNode) { |
1001 |
|
|
for (var i = 0; i < this.tileElements_.length; i++) { |
1002 |
|
|
if (!ignoreNode || ignoreNode !== this.tileElements_[i]) |
1003 |
|
|
this.positionTile_(i); |
1004 |
|
|
} |
1005 |
|
|
}, |
1006 |
|
|
|
1007 |
|
|
/** |
1008 |
estade@chromium.org |
83385 |
* Updates the visual indicator for the drop location for the active drag. |
1009 |
|
|
* @param {Event} e A MouseEvent for the drag. |
1010 |
|
|
* @private |
1011 |
|
|
*/ |
1012 |
|
|
updateDropIndicator_: function(newDragIndex) { |
1013 |
|
|
var oldDragIndex = this.currentDropIndex_; |
1014 |
|
|
if (newDragIndex == oldDragIndex) |
1015 |
|
|
return; |
1016 |
|
|
|
1017 |
|
|
var repositionStart = Math.min(newDragIndex, oldDragIndex); |
1018 |
|
|
var repositionEnd = Math.max(newDragIndex, oldDragIndex); |
1019 |
|
|
|
1020 |
|
|
for (var i = repositionStart; i <= repositionEnd; i++) { |
1021 |
|
|
if (i == this.dragItemIndex_) |
1022 |
|
|
continue; |
1023 |
|
|
else if (i > this.dragItemIndex_) |
1024 |
|
|
var adjustment = i <= newDragIndex ? -1 : 0; |
1025 |
|
|
else |
1026 |
|
|
var adjustment = i >= newDragIndex ? 1 : 0; |
1027 |
|
|
|
1028 |
|
|
this.positionTile_(i, adjustment); |
1029 |
|
|
} |
1030 |
|
|
this.currentDropIndex_ = newDragIndex; |
1031 |
|
|
}, |
1032 |
estade@chromium.org |
84700 |
|
1033 |
|
|
/** |
1034 |
estade@chromium.org |
86184 |
* Checks if a page can accept a drag with the given data. |
1035 |
estade@chromium.org |
93727 |
* @param {Event} e The drag event if the drag object. Implementations will |
1036 |
|
|
* likely want to check |e.dataTransfer|. |
1037 |
estade@chromium.org |
86184 |
* @return {boolean} True if this page can handle the drag. |
1038 |
|
|
*/ |
1039 |
estade@chromium.org |
93727 |
shouldAcceptDrag: function(e) { |
1040 |
estade@chromium.org |
86184 |
return false; |
1041 |
|
|
}, |
1042 |
|
|
|
1043 |
|
|
/** |
1044 |
estade@chromium.org |
95856 |
* Called to accept a drag drop. Will not be called for in-page drops. |
1045 |
estade@chromium.org |
86184 |
* @param {Object} dataTransfer The data transfer object that holds the drop |
1046 |
estade@chromium.org |
95856 |
* data. This should only be used if currentlyDraggingTile is null. |
1047 |
estade@chromium.org |
86184 |
* @param {number} index The tile index at which the drop occurred. |
1048 |
|
|
*/ |
1049 |
estade@chromium.org |
95856 |
addDragData: function(dataTransfer, index) { |
1050 |
estade@chromium.org |
86184 |
assert(false); |
1051 |
|
|
}, |
1052 |
estade@chromium.org |
87423 |
|
1053 |
|
|
/** |
1054 |
|
|
* Called when a tile has been moved (via dragging). Override this to make |
1055 |
|
|
* backend updates. |
1056 |
|
|
* @param {Node} draggedTile The tile that was dropped. |
1057 |
dbeam@chromium.org |
99701 |
* @param {number} prevIndex The previous index of the tile. |
1058 |
estade@chromium.org |
87423 |
*/ |
1059 |
dbeam@chromium.org |
99701 |
tileMoved: function(draggedTile, prevIndex) { |
1060 |
estade@chromium.org |
87423 |
}, |
1061 |
estade@chromium.org |
98342 |
|
1062 |
|
|
/** |
1063 |
|
|
* Sets the drop effect on |dataTransfer| to the desired value (e.g. |
1064 |
|
|
* 'copy'). |
1065 |
|
|
* @param {Object} dataTransfer The drag event dataTransfer object. |
1066 |
|
|
*/ |
1067 |
|
|
setDropEffect: function(dataTransfer) { |
1068 |
|
|
assert(false); |
1069 |
|
|
}, |
1070 |
estade@chromium.org |
81845 |
}; |
1071 |
|
|
|
1072 |
|
|
return { |
1073 |
estade@chromium.org |
86638 |
getCurrentlyDraggingTile: getCurrentlyDraggingTile, |
1074 |
estade@chromium.org |
81845 |
TilePage: TilePage, |
1075 |
|
|
}; |
1076 |
|
|
}); |