1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 cr.define('ntp', function() {
8 var TilePage = ntp.TilePage;
11 * A counter for generating unique tile IDs.
16 * Creates a new Suggestions page object for tiling.
18 * @extends {HTMLAnchorElement}
20 function Suggestion() {
21 var el = cr.doc.createElement('a');
22 el.__proto__ = Suggestion.prototype;
28 Suggestion.prototype = {
29 __proto__: HTMLAnchorElement.prototype,
31 initialize: function() {
34 this.addEventListener('click', this.handleClick_);
35 this.addEventListener('keydown', this.handleKeyDown_);
40 return this.tile.index;
48 * Clears the DOM hierarchy for this node, setting it back to the default
49 * for a blank thumbnail. TODO(georgey) make it a template.
52 this.className = 'suggestions filler real';
54 '<span class="thumbnail-wrapper fills-parent">' +
55 '<div class="close-button"></div>' +
56 '<span class="thumbnail fills-parent">' +
57 // thumbnail-shield provides a gradient fade effect.
58 '<div class="thumbnail-shield fills-parent"></div>' +
60 '<span class="favicon"></span>' +
62 '<div class="color-stripe"></div>' +
63 '<span class="title"></span>' +
64 '<span class="score"></span>';
66 this.querySelector('.close-button').title =
67 loadTimeData.getString('removethumbnailtooltip');
71 this.removeAttribute('id');
76 * Update the appearance of this tile according to |data|.
77 * @param {Object} data A dictionary of relevant data for the page.
79 updateForData: function(data) {
80 if (this.classList.contains('blacklisted') && data) {
81 // Animate appearance of new tile.
82 this.classList.add('new-tile-contents');
84 this.classList.remove('blacklisted');
86 if (!data || data.filler) {
93 this.id = 'suggestions-tile-' + id;
95 this.classList.add('focusable');
97 var faviconDiv = this.querySelector('.favicon');
98 var faviconUrl = 'chrome://favicon/size/16@1x/' + data.url;
99 faviconDiv.style.backgroundImage = url(faviconUrl);
100 chrome.send('getFaviconDominantColor', [faviconUrl, this.id]);
102 var title = this.querySelector('.title');
103 title.textContent = data.title;
104 title.dir = data.direction;
106 var score = this.querySelector('.score');
107 score.textContent = data.score;
110 this.title = data.title;
113 thumbnailUrl = data.urlImage ? data.urlImage :
114 'chrome://thumb/' + data.url;
116 this.querySelector('.thumbnail').style.backgroundImage =
119 this.href = data.url;
121 this.classList.remove('filler');
125 * Sets the color of the favicon dominant color bar.
126 * @param {string} color The css-parsable value for the color.
128 set stripeColor(color) {
129 this.querySelector('.color-stripe').style.backgroundColor = color;
133 * Handles a click on the tile.
134 * @param {Event} e The click event.
136 handleClick_: function(e) {
137 if (e.target.classList.contains('close-button')) {
141 // Records the index of this tile.
142 chrome.send('metricsHandler:recordInHistogram',
143 ['NewTabPage.SuggestedSite', this.index, 8]);
144 chrome.send('suggestedSitesAction',
145 [ntp.NtpFollowAction.CLICKED_TILE]);
150 * Allow blacklisting suggestions site using the keyboard.
151 * @param {Event} e The keydown event.
153 handleKeyDown_: function(e) {
154 if (!cr.isMac && e.keyCode == 46 || // Del
155 cr.isMac && e.metaKey && e.keyCode == 8) { // Cmd + Backspace
161 * Permanently removes a page from Suggestions.
163 blacklist_: function() {
164 this.showUndoNotification_();
165 chrome.send('blacklistURLFromSuggestions', [this.data_.url]);
167 chrome.send('getSuggestions');
168 this.classList.add('blacklisted');
172 * Shows notification that you can undo blacklisting.
174 showUndoNotification_: function() {
175 var data = this.data_;
177 var doUndo = function() {
178 chrome.send('removeURLsFromSuggestionsBlacklist', [data.url]);
179 self.updateForData(data);
184 text: loadTimeData.getString('undothumbnailremove'),
189 chrome.send('clearSuggestionsURLsBlacklist');
191 text: loadTimeData.getString('restoreThumbnailsShort'),
194 ntp.showNotification(
195 loadTimeData.getString('thumbnailremovednotification'),
200 * Set the size and position of the suggestions tile.
201 * @param {number} size The total size of |this|.
202 * @param {number} x The x-position.
203 * @param {number} y The y-position.
205 setBounds: function(size, x, y) {
206 this.style.width = size + 'px';
207 this.style.height = heightForWidth(size) + 'px';
209 this.style.left = x + 'px';
210 this.style.right = x + 'px';
211 this.style.top = y + 'px';
215 * Returns whether this element can be 'removed' from chrome (i.e. whether
216 * the user can drag it onto the trash and expect something to happen).
217 * @return {boolean} True, since suggestions pages can always be
220 canBeRemoved: function() {
225 * Removes this element from chrome, i.e. blacklists it.
227 removeFromChrome: function() {
229 this.parentNode.classList.add('finishing-drag');
233 * Called when a drag of this tile has ended (after all animations have
236 finalizeDrag: function() {
237 this.parentNode.classList.remove('finishing-drag');
241 * Called when a drag is starting on the tile. Updates dataTransfer with
242 * data for this tile (for dragging outside of the NTP).
243 * @param {Event.DataTransfer} dataTransfer The drag event data store.
245 setDragData: function(dataTransfer) {
246 dataTransfer.setData('Text', this.data_.title);
247 dataTransfer.setData('URL', this.data_.url);
251 var suggestionsPageGridValues = {
252 // The fewest tiles we will show in a row.
254 // The suggestions we will show in a row.
257 // The smallest a tile can be.
259 // The biggest a tile can be. 212 (max thumbnail width) + 2.
262 // The padding between tiles, as a fraction of the tile width.
263 tileSpacingFraction: 1 / 8,
265 TilePage.initGridValues(suggestionsPageGridValues);
268 * Calculates the height for a Suggestion tile for a given width. The size
269 * is based on the thumbnail, which should have a 212:132 ratio.
270 * @return {number} The height.
272 function heightForWidth(width) {
273 // The 2s are for borders, the 36 is for the title and score.
274 return (width - 2) * 132 / 212 + 2 + 36;
277 var THUMBNAIL_COUNT = 8;
280 * Creates a new SuggestionsPage object.
282 * @extends {TilePage}
284 function SuggestionsPage() {
285 var el = new TilePage(suggestionsPageGridValues);
286 el.__proto__ = SuggestionsPage.prototype;
292 SuggestionsPage.prototype = {
293 __proto__: TilePage.prototype,
295 initialize: function() {
296 this.classList.add('suggestions-page');
298 this.suggestionsTiles_ = this.getElementsByClassName('suggestions real');
300 this.addEventListener('carddeselected', this.handleCardDeselected_);
301 this.addEventListener('cardselected', this.handleCardSelected_);
305 * Create blank (filler) tiles.
308 createTiles_: function() {
309 for (var i = 0; i < THUMBNAIL_COUNT; i++) {
310 this.appendTile(new Suggestion());
315 * Update the tiles after a change to |this.data_|.
317 updateTiles_: function() {
318 for (var i = 0; i < THUMBNAIL_COUNT; i++) {
319 var page = this.data_[i];
320 var tile = this.suggestionsTiles_[i];
322 if (i >= this.data_.length)
325 tile.updateForData(page);
330 * Handles the 'card deselected' event (i.e. the user clicked to another
332 * @param {Event} e The CardChanged event.
334 handleCardDeselected_: function(e) {
335 if (!document.documentElement.classList.contains('starting-up')) {
336 chrome.send('suggestedSitesAction',
337 [ntp.NtpFollowAction.CLICKED_OTHER_NTP_PANE]);
342 * Handles the 'card selected' event (i.e. the user clicked to select the
344 * @param {Event} e The CardChanged event.
346 handleCardSelected_: function(e) {
347 if (!document.documentElement.classList.contains('starting-up'))
348 chrome.send('suggestedSitesSelected');
352 * Array of suggestions data objects.
359 var startTime = Date.now();
361 // The first time data is set, create the tiles.
364 this.data_ = data.slice(0, THUMBNAIL_COUNT);
366 this.data_ = refreshData(this.data_, data);
370 this.updateFocusableElement();
371 logEvent('suggestions.layout: ' + (Date.now() - startTime));
375 shouldAcceptDrag: function(e) {
380 heightForWidth: heightForWidth,
384 * Executed once the NTP has loaded. Checks if the Suggested pane is
385 * shown or not. If it is shown, the 'suggestedSitesSelected' message is sent
386 * to the C++ code, to record the fact that the user has seen this pane.
388 SuggestionsPage.onLoaded = function() {
389 if (ntp.getCardSlider() &&
390 ntp.getCardSlider().currentCardValue &&
391 ntp.getCardSlider().currentCardValue.classList
392 .contains('suggestions-page')) {
393 chrome.send('suggestedSitesSelected');
398 * We've gotten additional data for Suggestions page. Update our old data with
399 * the new data. The ordering of the new data is not important, except when a
400 * page is pinned. Thus we try to minimize re-ordering.
401 * @param {Array} oldData The current Suggestions page list.
402 * @param {Array} newData The new Suggestions page list.
403 * @return {Array} The merged page list that should replace the current page
406 function refreshData(oldData, newData) {
407 oldData = oldData.slice(0, THUMBNAIL_COUNT);
408 newData = newData.slice(0, THUMBNAIL_COUNT);
410 // Copy over pinned sites directly.
411 for (var i = 0; i < newData.length; i++) {
412 if (newData[i].pinned) {
413 oldData[i] = newData[i];
414 // Mark the entry as 'updated' so we don't try to update again.
415 oldData[i].updated = true;
416 // Mark the newData page as 'used' so we don't try to re-use it.
417 newData[i].used = true;
421 // Look through old pages; if they exist in the newData list, keep them
423 for (var i = 0; i < oldData.length; i++) {
424 if (!oldData[i] || oldData[i].updated)
427 for (var j = 0; j < newData.length; j++) {
431 if (newData[j].url == oldData[i].url) {
432 // The background image and other data may have changed.
433 oldData[i] = newData[j];
434 oldData[i].updated = true;
435 newData[j].used = true;
441 // Look through old pages that haven't been updated yet; replace them.
442 for (var i = 0; i < oldData.length; i++) {
443 if (oldData[i] && oldData[i].updated)
446 for (var j = 0; j < newData.length; j++) {
450 oldData[i] = newData[j];
451 oldData[i].updated = true;
452 newData[j].used = true;
456 if (oldData[i] && !oldData[i].updated)
460 // Clear 'updated' flags so this function will work next time it's called.
461 for (var i = 0; i < THUMBNAIL_COUNT; i++) {
463 oldData[i].updated = false;
470 SuggestionsPage: SuggestionsPage,
471 refreshData: refreshData,
475 document.addEventListener('ntpLoaded', ntp.SuggestionsPage.onLoaded);