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('options', function() {
6 /** @const */ var ArrayDataModel = cr.ui.ArrayDataModel;
7 /** @const */ var Grid = cr.ui.Grid;
8 /** @const */ var GridItem = cr.ui.GridItem;
9 /** @const */ var GridSelectionController = cr.ui.GridSelectionController;
10 /** @const */ var ListSingleSelectionModel = cr.ui.ListSingleSelectionModel;
13 * Dimensions for camera capture.
22 * Path for internal URLs.
25 var CHROME_THEME_PATH = 'chrome://theme';
28 * Creates a new user images grid item.
29 * @param {{url: string, title: (string|undefined),
30 * decorateFn: (!Function|undefined),
31 * clickHandler: (!Function|undefined)}} imageInfo User image URL,
32 * optional title, decorator callback and click handler.
34 * @extends {cr.ui.GridItem}
36 function UserImagesGridItem(imageInfo) {
37 var el = new GridItem(imageInfo);
38 el.__proto__ = UserImagesGridItem.prototype;
42 UserImagesGridItem.prototype = {
43 __proto__: GridItem.prototype,
46 decorate: function() {
47 GridItem.prototype.decorate.call(this);
48 var imageEl = cr.doc.createElement('img');
49 // Force 1x scale for chrome://theme URLs. Grid elements are much smaller
50 // than actual images so there is no need in full scale on HDPI.
51 var url = this.dataItem.url;
52 if (url.slice(0, CHROME_THEME_PATH.length) == CHROME_THEME_PATH)
53 imageEl.src = this.dataItem.url + '@1x';
55 imageEl.src = this.dataItem.url;
56 imageEl.title = this.dataItem.title || '';
57 imageEl.alt = imageEl.title;
58 if (typeof this.dataItem.clickHandler == 'function')
59 imageEl.addEventListener('mousedown', this.dataItem.clickHandler);
60 // Remove any garbage added by GridItem and ListItem decorators.
61 this.textContent = '';
62 this.appendChild(imageEl);
63 if (typeof this.dataItem.decorateFn == 'function')
64 this.dataItem.decorateFn(this);
65 this.setAttribute('role', 'option');
66 this.oncontextmenu = function(e) { e.preventDefault(); };
71 * Creates a selection controller that wraps selection on grid ends
72 * and translates Enter presses into 'activate' events.
73 * @param {cr.ui.ListSelectionModel} selectionModel The selection model to
75 * @param {cr.ui.Grid} grid The grid to interact with.
77 * @extends {cr.ui.GridSelectionController}
79 function UserImagesGridSelectionController(selectionModel, grid) {
80 GridSelectionController.call(this, selectionModel, grid);
83 UserImagesGridSelectionController.prototype = {
84 __proto__: GridSelectionController.prototype,
87 getIndexBefore: function(index) {
89 GridSelectionController.prototype.getIndexBefore.call(this, index);
90 return result == -1 ? this.getLastIndex() : result;
94 getIndexAfter: function(index) {
96 GridSelectionController.prototype.getIndexAfter.call(this, index);
97 return result == -1 ? this.getFirstIndex() : result;
101 handleKeyDown: function(e) {
102 if (e.keyIdentifier == 'Enter')
103 cr.dispatchSimpleEvent(this.grid_, 'activate');
105 GridSelectionController.prototype.handleKeyDown.call(this, e);
110 * Creates a new user images grid element.
111 * @param {Object=} opt_propertyBag Optional properties.
113 * @extends {cr.ui.Grid}
115 var UserImagesGrid = cr.ui.define('grid');
117 UserImagesGrid.prototype = {
118 __proto__: Grid.prototype,
121 createSelectionController: function(sm) {
122 return new UserImagesGridSelectionController(sm, this);
126 decorate: function() {
127 Grid.prototype.decorate.call(this);
128 this.dataModel = new ArrayDataModel([]);
129 this.itemConstructor = /** @type {function(new:cr.ui.ListItem, *)} */(
131 this.selectionModel = new ListSingleSelectionModel();
132 this.inProgramSelection_ = false;
133 this.addEventListener('dblclick', this.handleDblClick_.bind(this));
134 this.addEventListener('change', this.handleChange_.bind(this));
135 this.setAttribute('role', 'listbox');
136 this.autoExpands = true;
140 * Handles double click on the image grid.
141 * @param {Event} e Double click Event.
144 handleDblClick_: function(e) {
145 // If a child element is double-clicked and not the grid itself, handle
146 // this as 'Enter' keypress.
147 if (e.target != this)
148 cr.dispatchSimpleEvent(this, 'activate');
152 * Handles selection change.
153 * @param {Event} e Double click Event.
156 handleChange_: function(e) {
157 if (this.selectedItem === null)
160 var oldSelectionType = this.selectionType;
162 // Update current selection type.
163 this.selectionType = this.selectedItem.type;
165 // Show grey silhouette with the same border as stock images.
166 if (/^chrome:\/\/theme\//.test(this.selectedItemUrl))
167 this.previewElement.classList.add('default-image');
169 this.updatePreview_();
171 var e = new Event('select');
172 e.oldSelectionType = oldSelectionType;
173 this.dispatchEvent(e);
177 * Updates the preview image, if present.
180 updatePreview_: function() {
181 var url = this.selectedItemUrl;
182 if (url && this.previewImage_) {
183 if (url.slice(0, CHROME_THEME_PATH.length) == CHROME_THEME_PATH)
184 this.previewImage_.src = url + '@' + window.devicePixelRatio + 'x';
186 this.previewImage_.src = url;
191 * Whether a camera is present or not.
194 get cameraPresent() {
195 return this.cameraPresent_;
197 set cameraPresent(value) {
198 this.cameraPresent_ = value;
200 this.cameraImage = null;
204 * Whether camera is actually streaming video. May be |false| even when
205 * camera is present and shown but still initializing.
209 return this.previewElement.classList.contains('online');
211 set cameraOnline(value) {
212 this.previewElement.classList.toggle('online', value);
216 * Tries to starts camera stream capture.
217 * @param {function(): boolean} onAvailable Callback that is called if
218 * camera is available. If it returns |true|, capture is started
221 startCamera: function(onAvailable, onAbsent) {
223 this.cameraStartInProgress_ = true;
224 navigator.webkitGetUserMedia(
226 this.handleCameraAvailable_.bind(this, onAvailable),
227 this.handleCameraAbsent_.bind(this));
231 * Stops camera capture, if it's currently active.
233 stopCamera: function() {
234 this.cameraOnline = false;
235 if (this.cameraVideo_)
236 this.cameraVideo_.src = '';
237 if (this.cameraStream_)
238 this.cameraStream_.stop();
239 // Cancel any pending getUserMedia() checks.
240 this.cameraStartInProgress_ = false;
244 * Handles successful camera check.
245 * @param {function(): boolean} onAvailable Callback to call. If it returns
246 * |true|, capture is started immediately.
247 * @param {!MediaStream} stream Stream object as returned by getUserMedia.
249 * @suppress {deprecated}
251 handleCameraAvailable_: function(onAvailable, stream) {
252 if (this.cameraStartInProgress_ && onAvailable()) {
253 this.cameraVideo_.src = URL.createObjectURL(stream);
254 this.cameraStream_ = stream;
258 this.cameraStartInProgress_ = false;
262 * Handles camera check failure.
263 * @param {NavigatorUserMediaError=} err Error object.
266 handleCameraAbsent_: function(err) {
267 this.cameraPresent = false;
268 this.cameraOnline = false;
269 this.cameraStartInProgress_ = false;
273 * Handles successful camera capture start.
276 handleVideoStarted_: function() {
277 this.cameraOnline = true;
278 this.handleVideoUpdate_();
282 * Handles camera stream update. Called regularly (at rate no greater then
283 * 4/sec) while camera stream is live.
286 handleVideoUpdate_: function() {
287 this.lastFrameTime_ = new Date().getTime();
291 * Type of the selected image (one of 'default', 'profile', 'camera').
292 * Setting it will update class list of |previewElement|.
295 get selectionType() {
296 return this.selectionType_;
298 set selectionType(value) {
299 this.selectionType_ = value;
300 var previewClassList = this.previewElement.classList;
301 previewClassList[value == 'default' ? 'add' : 'remove']('default-image');
302 previewClassList[value == 'profile' ? 'add' : 'remove']('profile-image');
303 previewClassList[value == 'camera' ? 'add' : 'remove']('camera');
305 var setFocusIfLost = function() {
306 // Set focus to the grid, if focus is not on UI.
307 if (!document.activeElement ||
308 document.activeElement.tagName == 'BODY') {
309 $('user-image-grid').focus();
312 // Timeout guarantees processing AFTER style changes display attribute.
313 setTimeout(setFocusIfLost, 0);
317 * Current image captured from camera as data URL. Setting to null will
318 * return to the live camera stream.
319 * @type {(string|undefined)}
322 return this.cameraImage_;
324 set cameraImage(imageUrl) {
325 this.cameraLive = !imageUrl;
326 if (this.cameraPresent && !imageUrl)
327 imageUrl = UserImagesGrid.ButtonImages.TAKE_PHOTO;
329 this.cameraImage_ = this.cameraImage_ ?
330 this.updateItem(this.cameraImage_, imageUrl, this.cameraTitle_) :
331 this.addItem(imageUrl, this.cameraTitle_, undefined, 0);
332 this.cameraImage_.type = 'camera';
334 this.removeItem(this.cameraImage_);
335 this.cameraImage_ = null;
340 * Updates the titles for the camera element.
341 * @param {string} placeholderTitle Title when showing a placeholder.
342 * @param {string} capturedImageTitle Title when showing a captured photo.
344 setCameraTitles: function(placeholderTitle, capturedImageTitle) {
345 this.placeholderTitle_ = placeholderTitle;
346 this.capturedImageTitle_ = capturedImageTitle;
347 this.cameraTitle_ = this.placeholderTitle_;
351 * True when camera is in live mode (i.e. no still photo selected).
355 return this.cameraLive_;
357 set cameraLive(value) {
358 this.cameraLive_ = value;
359 this.previewElement.classList[value ? 'add' : 'remove']('live');
363 * Should only be queried from the 'change' event listener, true if the
364 * change event was triggered by a programmatical selection change.
367 get inProgramSelection() {
368 return this.inProgramSelection_;
372 * URL of the image selected.
375 get selectedItemUrl() {
376 var selectedItem = this.selectedItem;
377 return selectedItem ? selectedItem.url : null;
379 set selectedItemUrl(url) {
380 for (var i = 0, el; el = this.dataModel.item(i); i++) {
382 this.selectedItemIndex = i;
387 * Set index to the image selected.
388 * @type {number} index The index of selected image.
390 set selectedItemIndex(index) {
391 this.inProgramSelection_ = true;
392 this.selectionModel.selectedIndex = index;
393 this.inProgramSelection_ = false;
398 var index = this.selectionModel.selectedIndex;
399 return index != -1 ? this.dataModel.item(index) : null;
401 set selectedItem(selectedItem) {
402 var index = this.indexOf(selectedItem);
403 this.inProgramSelection_ = true;
404 this.selectionModel.selectedIndex = index;
405 this.selectionModel.leadIndex = index;
406 this.inProgramSelection_ = false;
410 * Element containing the preview image (the first IMG element) and the
411 * camera live stream (the first VIDEO element).
412 * @type {HTMLElement}
414 get previewElement() {
415 // TODO(ivankr): temporary hack for non-HTML5 version.
416 return this.previewElement_ || this;
418 set previewElement(value) {
419 this.previewElement_ = value;
420 this.previewImage_ = value.querySelector('img');
421 this.cameraVideo_ = value.querySelector('video');
422 this.cameraVideo_.addEventListener('canplay',
423 this.handleVideoStarted_.bind(this));
424 this.cameraVideo_.addEventListener('timeupdate',
425 this.handleVideoUpdate_.bind(this));
426 this.updatePreview_();
427 // Initialize camera state and check for its presence.
428 this.cameraLive = true;
429 this.cameraPresent = false;
433 * Whether the camera live stream and photo should be flipped horizontally.
434 * If setting this property results in photo update, 'photoupdated' event
435 * will be fired with 'dataURL' property containing the photo encoded as
440 return this.flipPhoto_ || false;
442 set flipPhoto(value) {
443 if (this.flipPhoto_ == value)
445 this.flipPhoto_ = value;
446 this.previewElement.classList.toggle('flip-x', value);
447 /* TODO(merkulova): remove when webkit crbug.com/126479 is fixed. */
448 this.flipPhotoElement.classList.toggle('flip-trick', value);
449 if (!this.cameraLive) {
450 // Flip current still photo.
451 var e = new Event('photoupdated');
452 e.dataURL = this.flipPhoto ?
453 this.flipFrame_(this.previewImage_) : this.previewImage_.src;
454 this.dispatchEvent(e);
459 * Performs photo capture from the live camera stream. 'phototaken' event
460 * will be fired as soon as captured photo is available, with 'dataURL'
461 * property containing the photo encoded as a data URL.
462 * @return {boolean} Whether photo capture was successful.
464 takePhoto: function() {
465 if (!this.cameraOnline)
467 var canvas = /** @type {HTMLCanvasElement} */(
468 document.createElement('canvas'));
469 canvas.width = CAPTURE_SIZE.width;
470 canvas.height = CAPTURE_SIZE.height;
473 /** @type {CanvasRenderingContext2D} */(canvas.getContext('2d')),
475 // Preload image before displaying it.
476 var previewImg = new Image();
477 previewImg.addEventListener('load', function(e) {
478 this.cameraTitle_ = this.capturedImageTitle_;
479 this.cameraImage = previewImg.src;
481 previewImg.src = canvas.toDataURL('image/png');
482 var e = new Event('phototaken');
483 e.dataURL = this.flipPhoto ? this.flipFrame_(canvas) : previewImg.src;
484 this.dispatchEvent(e);
489 * Discard current photo and return to the live camera stream.
491 discardPhoto: function() {
492 this.cameraTitle_ = this.placeholderTitle_;
493 this.cameraImage = null;
497 * Capture a single still frame from a <video> element, placing it at the
498 * current drawing origin of a canvas context.
499 * @param {HTMLVideoElement} video Video element to capture from.
500 * @param {CanvasRenderingContext2D} ctx Canvas context to draw onto.
501 * @param {{width: number, height: number}} destSize Capture size.
504 captureFrame_: function(video, ctx, destSize) {
505 var width = video.videoWidth;
506 var height = video.videoHeight;
507 if (width < destSize.width || height < destSize.height) {
508 console.error('Video capture size too small: ' +
509 width + 'x' + height + '!');
512 if (width / destSize.width > height / destSize.height) {
513 // Full height, crop left/right.
515 src.width = height * destSize.width / destSize.height;
517 // Full width, crop top/bottom.
519 src.height = width * destSize.height / destSize.width;
521 src.x = (width - src.width) / 2;
522 src.y = (height - src.height) / 2;
523 ctx.drawImage(video, src.x, src.y, src.width, src.height,
524 0, 0, destSize.width, destSize.height);
528 * Flips frame horizontally.
529 * @param {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement} source
531 * @return {string} Flipped frame as data URL.
533 flipFrame_: function(source) {
534 var canvas = document.createElement('canvas');
535 canvas.width = CAPTURE_SIZE.width;
536 canvas.height = CAPTURE_SIZE.height;
537 var ctx = canvas.getContext('2d');
538 ctx.translate(CAPTURE_SIZE.width, 0);
539 ctx.scale(-1.0, 1.0);
540 ctx.drawImage(source, 0, 0);
541 return canvas.toDataURL('image/png');
545 * Adds new image to the user image grid.
546 * @param {string} url Image URL.
547 * @param {string=} opt_title Image tooltip.
548 * @param {Function=} opt_clickHandler Image click handler.
549 * @param {number=} opt_position If given, inserts new image into
550 * that position (0-based) in image list.
551 * @param {Function=} opt_decorateFn Function called with the list element
552 * as argument to do any final decoration.
553 * @return {!Object} Image data inserted into the data model.
555 // TODO(ivankr): this function needs some argument list refactoring.
556 addItem: function(url, opt_title, opt_clickHandler, opt_position,
561 clickHandler: opt_clickHandler,
562 decorateFn: opt_decorateFn
564 this.inProgramSelection_ = true;
565 if (opt_position !== undefined)
566 this.dataModel.splice(opt_position, 0, imageInfo);
568 this.dataModel.push(imageInfo);
569 this.inProgramSelection_ = false;
574 * Returns index of an image in grid.
575 * @param {Object} imageInfo Image data returned from addItem() call.
576 * @return {number} Image index (0-based) or -1 if image was not found.
578 indexOf: function(imageInfo) {
579 return this.dataModel.indexOf(imageInfo);
583 * Replaces an image in the grid.
584 * @param {Object} imageInfo Image data returned from addItem() call.
585 * @param {string} imageUrl New image URL.
586 * @param {string=} opt_title New image tooltip (if undefined, tooltip
587 * is left unchanged).
588 * @return {!Object} Image data of the added or updated image.
590 updateItem: function(imageInfo, imageUrl, opt_title) {
591 var imageIndex = this.indexOf(imageInfo);
592 var wasSelected = this.selectionModel.selectedIndex == imageIndex;
593 this.removeItem(imageInfo);
594 var newInfo = this.addItem(
596 opt_title === undefined ? imageInfo.title : opt_title,
597 imageInfo.clickHandler,
599 imageInfo.decorateFn);
600 // Update image data with the reset of the keys from the old data.
601 for (var k in imageInfo) {
603 newInfo[k] = imageInfo[k];
606 this.selectedItem = newInfo;
611 * Removes previously added image from the grid.
612 * @param {Object} imageInfo Image data returned from the addItem() call.
614 removeItem: function(imageInfo) {
615 var index = this.indexOf(imageInfo);
617 var wasSelected = this.selectionModel.selectedIndex == index;
618 this.inProgramSelection_ = true;
619 this.dataModel.splice(index, 1);
621 // If item removed was selected, select the item next to it.
622 this.selectedItem = this.dataModel.item(
623 Math.min(this.dataModel.length - 1, index));
625 this.inProgramSelection_ = false;
630 * Forces re-display, size re-calculation and focuses grid.
632 updateAndFocus: function() {
633 // Recalculate the measured item size.
634 this.measured_ = null;
641 * Appends default images to the image grid. Should only be called once.
642 * @param {Array<{url: string, author: string,
643 * website: string, title: string}>} imagesData
644 * An array of default images data, including URL, author, title and
647 setDefaultImages: function(imagesData) {
648 for (var i = 0, data; data = imagesData[i]; i++) {
649 var item = this.addItem(data.url, data.title);
650 item.type = 'default';
651 item.author = data.author || '';
652 item.website = data.website || '';
658 * URLs of special button images.
661 UserImagesGrid.ButtonImages = {
662 TAKE_PHOTO: 'chrome://theme/IDR_BUTTON_USER_IMAGE_TAKE_PHOTO',
663 CHOOSE_FILE: 'chrome://theme/IDR_BUTTON_USER_IMAGE_CHOOSE_FILE',
664 PROFILE_PICTURE: 'chrome://theme/IDR_PROFILE_PICTURE_LOADING'
668 UserImagesGrid: UserImagesGrid