1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
// 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.
// Counter used to give webkit animations unique names.
var animationCounter = 0;
var animationEventTracker_ = new EventTracker();
function addAnimation(code) {
var name = 'anim' + animationCounter;
animationCounter++;
var rules = document.createTextNode(
'@-webkit-keyframes ' + name + ' {' + code + '}');
var el = document.createElement('style');
el.type = 'text/css';
el.appendChild(rules);
el.setAttribute('id', name);
document.body.appendChild(el);
return name;
}
/**
* Generates css code for fading in an element by animating the height.
* @param {number} targetHeight The desired height in pixels after the animation
* ends.
* @return {string} The css code for the fade in animation.
*/
function getFadeInAnimationCode(targetHeight) {
return '0% { opacity: 0; height: 0; } ' +
'80% { opacity: 0.5; height: ' + (targetHeight + 4) + 'px; }' +
'100% { opacity: 1; height: ' + targetHeight + 'px; }';
}
/**
* Fades in an element. Used for both printing options and error messages
* appearing underneath the textfields.
* @param {HTMLElement} el The element to be faded in.
* @param {boolean=} opt_justShow Whether {@code el} should be shown with no
* animation.
*/
function fadeInElement(el, opt_justShow) {
if (el.classList.contains('visible'))
return;
el.classList.remove('closing');
el.hidden = false;
el.setAttribute('aria-hidden', 'false');
el.style.height = 'auto';
var height = el.offsetHeight;
if (opt_justShow) {
el.style.height = '';
el.style.opacity = '';
} else {
el.style.height = height + 'px';
var animName = addAnimation(getFadeInAnimationCode(height));
animationEventTracker_.add(
el, 'webkitAnimationEnd', onFadeInAnimationEnd.bind(el), false);
el.style.webkitAnimationName = animName;
}
el.classList.add('visible');
}
/**
* Fades out an element. Used for both printing options and error messages
* appearing underneath the textfields.
* @param {HTMLElement} el The element to be faded out.
*/
function fadeOutElement(el) {
if (!el.classList.contains('visible'))
return;
fadeInAnimationCleanup(el);
el.style.height = 'auto';
var height = el.offsetHeight;
el.style.height = height + 'px';
el.offsetHeight; // Should force an update of the computed style.
animationEventTracker_.add(
el, 'webkitTransitionEnd', onFadeOutTransitionEnd.bind(el), false);
el.classList.add('closing');
el.classList.remove('visible');
el.setAttribute('aria-hidden', 'true');
}
/**
* Executes when a fade out animation ends.
* @param {WebkitTransitionEvent} event The event that triggered this listener.
* @this {HTMLElement} The element where the transition occurred.
*/
function onFadeOutTransitionEnd(event) {
if (event.propertyName != 'height')
return;
animationEventTracker_.remove(this, 'webkitTransitionEnd');
this.hidden = true;
}
/**
* Executes when a fade in animation ends.
* @param {WebkitAnimationEvent} event The event that triggered this listener.
* @this {HTMLElement} The element where the transition occurred.
*/
function onFadeInAnimationEnd(event) {
this.style.height = '';
fadeInAnimationCleanup(this);
}
/**
* Removes the <style> element corresponding to |animationName| from the DOM.
* @param {HTMLElement} element The animated element.
*/
function fadeInAnimationCleanup(element) {
if (element.style.webkitAnimationName) {
var animEl = document.getElementById(element.style.webkitAnimationName);
if (animEl)
animEl.parentNode.removeChild(animEl);
element.style.webkitAnimationName = '';
animationEventTracker_.remove(element, 'webkitAnimationEnd');
}
}
/**
* Fades in a printing option existing under |el|.
* @param {HTMLElement} el The element to hide.
* @param {boolean=} opt_justShow Whether {@code el} should be hidden with no
* animation.
*/
function fadeInOption(el, opt_justShow) {
if (el.classList.contains('visible'))
return;
// To make the option visible during the first fade in.
el.hidden = false;
var leftColumn = el.querySelector('.left-column');
wrapContentsInDiv(leftColumn, ['invisible']);
var rightColumn = el.querySelector('.right-column');
wrapContentsInDiv(rightColumn, ['invisible']);
var toAnimate = el.querySelectorAll('.collapsible');
for (var i = 0; i < toAnimate.length; i++)
fadeInElement(toAnimate[i], opt_justShow);
el.classList.add('visible');
}
/**
* Fades out a printing option existing under |el|.
* @param {HTMLElement} el The element to hide.
* @param {boolean=} opt_justHide Whether {@code el} should be hidden with no
* animation.
*/
function fadeOutOption(el, opt_justHide) {
if (!el.classList.contains('visible'))
return;
var leftColumn = el.querySelector('.left-column');
wrapContentsInDiv(leftColumn, ['visible']);
var rightColumn = el.querySelector('.right-column');
wrapContentsInDiv(rightColumn, ['visible']);
var toAnimate = el.querySelectorAll('.collapsible');
for (var i = 0; i < toAnimate.length; i++) {
if (opt_justHide) {
toAnimate[i].hidden = true;
toAnimate[i].classList.add('closing');
toAnimate[i].classList.remove('visible');
} else {
fadeOutElement(toAnimate[i]);
}
}
el.classList.remove('visible');
}
/**
* Wraps the contents of |el| in a div element and attaches css classes
* |classes| in the new div, only if has not been already done. It is necessary
* for animating the height of table cells.
* @param {HTMLElement} el The element to be processed.
* @param {array} classes The css classes to add.
*/
function wrapContentsInDiv(el, classes) {
var div = el.querySelector('div');
if (!div || !div.classList.contains('collapsible')) {
div = document.createElement('div');
while (el.childNodes.length > 0)
div.appendChild(el.firstChild);
el.appendChild(div);
}
div.className = '';
div.classList.add('collapsible');
for (var i = 0; i < classes.length; i++)
div.classList.add(classes[i]);
}
|
