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- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
-
- cr.define('ntp', function() {
- 'use strict';
-
- var TilePage = ntp.TilePage;
-
- /**
- * A counter for generating unique tile IDs.
- */
- var tileID = 0;
-
- /**
- * Creates a new Suggestions page object for tiling.
- * @constructor
- * @extends {HTMLAnchorElement}
- */
- function Suggestion() {
- var el = cr.doc.createElement('a');
- el.__proto__ = Suggestion.prototype;
- el.initialize();
-
- return el;
- }
-
- Suggestion.prototype = {
- __proto__: HTMLAnchorElement.prototype,
-
- initialize: function() {
- this.reset();
-
- this.addEventListener('click', this.handleClick_);
- this.addEventListener('keydown', this.handleKeyDown_);
- },
-
- get index() {
- assert(this.tile);
- return this.tile.index;
- },
-
- get data() {
- return this.data_;
- },
-
- /**
- * Clears the DOM hierarchy for this node, setting it back to the default
- * for a blank thumbnail. TODO(georgey) make it a template.
- */
- reset: function() {
- this.className = 'suggestions filler real';
- this.innerHTML =
- '<span class="thumbnail-wrapper fills-parent">' +
- '<div class="close-button"></div>' +
- '<span class="thumbnail fills-parent">' +
- // thumbnail-shield provides a gradient fade effect.
- '<div class="thumbnail-shield fills-parent"></div>' +
- '</span>' +
- '<span class="favicon"></span>' +
- '</span>' +
- '<div class="color-stripe"></div>' +
- '<span class="title"></span>' +
- '<span class="score"></span>';
-
- this.querySelector('.close-button').title =
- loadTimeData.getString('removethumbnailtooltip');
-
- this.tabIndex = -1;
- this.data_ = null;
- this.removeAttribute('id');
- this.title = '';
- },
-
- /**
- * Update the appearance of this tile according to |data|.
- * @param {Object} data A dictionary of relevant data for the page.
- */
- updateForData: function(data) {
- if (this.classList.contains('blacklisted') && data) {
- // Animate appearance of new tile.
- this.classList.add('new-tile-contents');
- }
- this.classList.remove('blacklisted');
-
- if (!data || data.filler) {
- if (this.data_)
- this.reset();
- return;
- }
-
- var id = tileID++;
- this.id = 'suggestions-tile-' + id;
- this.data_ = data;
- this.classList.add('focusable');
-
- var faviconDiv = this.querySelector('.favicon');
- var faviconUrl = 'chrome://favicon/size/16/' + data.url;
- faviconDiv.style.backgroundImage = url(faviconUrl);
- chrome.send('getFaviconDominantColor', [faviconUrl, this.id]);
-
- var title = this.querySelector('.title');
- title.textContent = data.title;
- title.dir = data.direction;
-
- var score = this.querySelector('.score');
- score.textContent = data.score;
-
- // Sets the tooltip.
- this.title = data.title;
-
- var thumbnailUrl;
- thumbnailUrl = data.urlImage ? data.urlImage :
- 'chrome://thumb/' + data.url;
-
- this.querySelector('.thumbnail').style.backgroundImage =
- url(thumbnailUrl);
-
- this.href = data.url;
-
- this.classList.remove('filler');
- },
-
- /**
- * Sets the color of the favicon dominant color bar.
- * @param {string} color The css-parsable value for the color.
- */
- set stripeColor(color) {
- this.querySelector('.color-stripe').style.backgroundColor = color;
- },
-
- /**
- * Handles a click on the tile.
- * @param {Event} e The click event.
- */
- handleClick_: function(e) {
- if (e.target.classList.contains('close-button')) {
- this.blacklist_();
- e.preventDefault();
- } else {
- // Records the index of this tile.
- chrome.send('metricsHandler:recordInHistogram',
- ['NewTabPage.SuggestedSite', this.index, 8]);
- chrome.send('suggestedSitesAction',
- [ntp.NtpFollowAction.CLICKED_TILE]);
- }
- },
-
- /**
- * Allow blacklisting suggestions site using the keyboard.
- * @param {Event} e The keydown event.
- */
- handleKeyDown_: function(e) {
- if (!cr.isMac && e.keyCode == 46 || // Del
- cr.isMac && e.metaKey && e.keyCode == 8) { // Cmd + Backspace
- this.blacklist_();
- }
- },
-
- /**
- * Permanently removes a page from Suggestions.
- */
- blacklist_: function() {
- this.showUndoNotification_();
- chrome.send('blacklistURLFromSuggestions', [this.data_.url]);
- this.reset();
- chrome.send('getSuggestions');
- this.classList.add('blacklisted');
- },
-
- /**
- * Shows notification that you can undo blacklisting.
- */
- showUndoNotification_: function() {
- var data = this.data_;
- var self = this;
- var doUndo = function() {
- chrome.send('removeURLsFromSuggestionsBlacklist', [data.url]);
- self.updateForData(data);
- };
-
- var undo = {
- action: doUndo,
- text: loadTimeData.getString('undothumbnailremove'),
- };
-
- var undoAll = {
- action: function() {
- chrome.send('clearSuggestionsURLsBlacklist');
- },
- text: loadTimeData.getString('restoreThumbnailsShort'),
- };
-
- ntp.showNotification(
- loadTimeData.getString('thumbnailremovednotification'),
- [undo, undoAll]);
- },
-
- /**
- * Set the size and position of the suggestions tile.
- * @param {number} size The total size of |this|.
- * @param {number} x The x-position.
- * @param {number} y The y-position.
- */
- setBounds: function(size, x, y) {
- this.style.width = size + 'px';
- this.style.height = heightForWidth(size) + 'px';
-
- this.style.left = x + 'px';
- this.style.right = x + 'px';
- this.style.top = y + 'px';
- },
-
- /**
- * Returns whether this element can be 'removed' from chrome (i.e. whether
- * the user can drag it onto the trash and expect something to happen).
- * @return {boolean} True, since suggestions pages can always be
- * blacklisted.
- */
- canBeRemoved: function() {
- return true;
- },
-
- /**
- * Removes this element from chrome, i.e. blacklists it.
- */
- removeFromChrome: function() {
- this.blacklist_();
- this.parentNode.classList.add('finishing-drag');
- },
-
- /**
- * Called when a drag of this tile has ended (after all animations have
- * finished).
- */
- finalizeDrag: function() {
- this.parentNode.classList.remove('finishing-drag');
- },
-
- /**
- * Called when a drag is starting on the tile. Updates dataTransfer with
- * data for this tile (for dragging outside of the NTP).
- * @param {Event.DataTransfer} dataTransfer The drag event data store.
- */
- setDragData: function(dataTransfer) {
- dataTransfer.setData('Text', this.data_.title);
- dataTransfer.setData('URL', this.data_.url);
- },
- };
-
- var suggestionsPageGridValues = {
- // The fewest tiles we will show in a row.
- minColCount: 2,
- // The suggestions we will show in a row.
- maxColCount: 4,
-
- // The smallest a tile can be.
- minTileWidth: 122,
- // The biggest a tile can be. 212 (max thumbnail width) + 2.
- maxTileWidth: 214,
-
- // The padding between tiles, as a fraction of the tile width.
- tileSpacingFraction: 1 / 8,
- };
- TilePage.initGridValues(suggestionsPageGridValues);
-
- /**
- * Calculates the height for a Suggestion tile for a given width. The size
- * is based on the thumbnail, which should have a 212:132 ratio.
- * @return {number} The height.
- */
- function heightForWidth(width) {
- // The 2s are for borders, the 36 is for the title and score.
- return (width - 2) * 132 / 212 + 2 + 36;
- }
-
- var THUMBNAIL_COUNT = 8;
-
- /**
- * Creates a new SuggestionsPage object.
- * @constructor
- * @extends {TilePage}
- */
- function SuggestionsPage() {
- var el = new TilePage(suggestionsPageGridValues);
- el.__proto__ = SuggestionsPage.prototype;
- el.initialize();
-
- return el;
- }
-
- SuggestionsPage.prototype = {
- __proto__: TilePage.prototype,
-
- initialize: function() {
- this.classList.add('suggestions-page');
- this.data_ = null;
- this.suggestionsTiles_ = this.getElementsByClassName('suggestions real');
-
- this.addEventListener('carddeselected', this.handleCardDeselected_);
- this.addEventListener('cardselected', this.handleCardSelected_);
- },
-
- /**
- * Create blank (filler) tiles.
- * @private
- */
- createTiles_: function() {
- for (var i = 0; i < THUMBNAIL_COUNT; i++) {
- this.appendTile(new Suggestion());
- }
- },
-
- /**
- * Update the tiles after a change to |this.data_|.
- */
- updateTiles_: function() {
- for (var i = 0; i < THUMBNAIL_COUNT; i++) {
- var page = this.data_[i];
- var tile = this.suggestionsTiles_[i];
-
- if (i >= this.data_.length)
- tile.reset();
- else
- tile.updateForData(page);
- }
- },
-
- /**
- * Handles the 'card deselected' event (i.e. the user clicked to another
- * pane).
- * @param {Event} e The CardChanged event.
- */
- handleCardDeselected_: function(e) {
- if (!document.documentElement.classList.contains('starting-up')) {
- chrome.send('suggestedSitesAction',
- [ntp.NtpFollowAction.CLICKED_OTHER_NTP_PANE]);
- }
- },
-
- /**
- * Handles the 'card selected' event (i.e. the user clicked to select the
- * Suggested pane).
- * @param {Event} e The CardChanged event.
- */
- handleCardSelected_: function(e) {
- if (!document.documentElement.classList.contains('starting-up'))
- chrome.send('suggestedSitesSelected');
- },
-
- /**
- * Array of suggestions data objects.
- * @type {Array}
- */
- get data() {
- return this.data_;
- },
- set data(data) {
- var startTime = Date.now();
-
- // The first time data is set, create the tiles.
- if (!this.data_) {
- this.createTiles_();
- this.data_ = data.slice(0, THUMBNAIL_COUNT);
- } else {
- this.data_ = refreshData(this.data_, data);
- }
-
- this.updateTiles_();
- logEvent('suggestions.layout: ' + (Date.now() - startTime));
- },
-
- /** @override */
- shouldAcceptDrag: function(e) {
- return false;
- },
-
- /** @override */
- heightForWidth: heightForWidth,
- };
-
- /**
- * Executed once the NTP has loaded. Checks if the Suggested pane is
- * shown or not. If it is shown, the 'suggestedSitesSelected' message is sent
- * to the C++ code, to record the fact that the user has seen this pane.
- */
- SuggestionsPage.onLoaded = function() {
- if (ntp.getCardSlider() &&
- ntp.getCardSlider().currentCardValue &&
- ntp.getCardSlider().currentCardValue.classList
- .contains('suggestions-page')) {
- chrome.send('suggestedSitesSelected');
- }
- }
-
- /**
- * We've gotten additional data for Suggestions page. Update our old data with
- * the new data. The ordering of the new data is not important, except when a
- * page is pinned. Thus we try to minimize re-ordering.
- * @param {Array} oldData The current Suggestions page list.
- * @param {Array} newData The new Suggestions page list.
- * @return {Array} The merged page list that should replace the current page
- * list.
- */
- function refreshData(oldData, newData) {
- oldData = oldData.slice(0, THUMBNAIL_COUNT);
- newData = newData.slice(0, THUMBNAIL_COUNT);
-
- // Copy over pinned sites directly.
- for (var i = 0; i < newData.length; i++) {
- if (newData[i].pinned) {
- oldData[i] = newData[i];
- // Mark the entry as 'updated' so we don't try to update again.
- oldData[i].updated = true;
- // Mark the newData page as 'used' so we don't try to re-use it.
- newData[i].used = true;
- }
- }
-
- // Look through old pages; if they exist in the newData list, keep them
- // where they are.
- for (var i = 0; i < oldData.length; i++) {
- if (!oldData[i] || oldData[i].updated)
- continue;
-
- for (var j = 0; j < newData.length; j++) {
- if (newData[j].used)
- continue;
-
- if (newData[j].url == oldData[i].url) {
- // The background image and other data may have changed.
- oldData[i] = newData[j];
- oldData[i].updated = true;
- newData[j].used = true;
- break;
- }
- }
- }
-
- // Look through old pages that haven't been updated yet; replace them.
- for (var i = 0; i < oldData.length; i++) {
- if (oldData[i] && oldData[i].updated)
- continue;
-
- for (var j = 0; j < newData.length; j++) {
- if (newData[j].used)
- continue;
-
- oldData[i] = newData[j];
- oldData[i].updated = true;
- newData[j].used = true;
- break;
- }
-
- if (oldData[i] && !oldData[i].updated)
- oldData[i] = null;
- }
-
- // Clear 'updated' flags so this function will work next time it's called.
- for (var i = 0; i < THUMBNAIL_COUNT; i++) {
- if (oldData[i])
- oldData[i].updated = false;
- }
-
- return oldData;
- }
-
- return {
- SuggestionsPage: SuggestionsPage,
- refreshData: refreshData,
- };
- });
-
- document.addEventListener('ntpLoaded', ntp.SuggestionsPage.onLoaded);
-