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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="help" src="https://www.w3.org/TR/scroll-animations-1/#named-range-animation-declaration">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script src="/web-animations/resources/keyframe-utils.js"></script>
<script src="support/testcommon.js"></script>
<script src="/scroll-animations/scroll-timelines/testcommon.js"></script>
<title>Programmatic API overrides animation-range-*</title>
</head>
<style type="text/css">
#scroller {
border: 10px solid lightgray;
overflow-y: scroll;
overflow-x: hidden;
width: 300px;
height: 200px;
}
@keyframes anim {
from { margin-left: 0px; }
to { margin-left: 100px; }
}
#target {
margin: 800px 0px;
width: 100px;
height: 100px;
z-index: -1;
background-color: green;
}
.animate {
animation: anim auto linear;
view-timeline: --timeline;
animation-timeline: --timeline;
animation-range-start: entry 0%;
animation-range-end: entry 100%;
}
</style>
<body>
<div id=scroller>
<div id=target></div>
</div>
</body>
<script type="text/javascript">
async function runTest() {
function startAnimation(t) {
target.classList.add('animate');
t.add_cleanup(async () => {
target.classList.remove('animate');
await waitForNextFrame();
});
return target.getAnimations()[0];
}
promise_test(async t => {
// Points of interest:
// entry 0% @ 600
// entry 100% / contain 0% @ 700
// exit 0% / contain 100% @ 800
// exit 100% @ 900
const anim = startAnimation(t);
await anim.ready;
scroller.scrollTop = 650;
await waitForNextFrame();
// Timline time = (scroll pos - cover 0%) / (cover 100% - cover 0%) * 100%
// = (650 - 600)/(900 - 600) * 100% = 100/6%
assert_percents_equal(anim.timeline.currentTime, 100/6,
'timeline\'s current time before style change');
assert_percents_equal(anim.startTime, 0,
'animation\'s start time before style change');
// Range start of entry 0% aligns with timeline start. Thus, animation's
// and timeline's current time are equal.
assert_percents_equal(anim.currentTime, 100/6,
'animation\'s current time before style change');
// Iteration duration =
// (range end - range start) / (cover 100% - cover 0%) * 100%
// = (700 - 600) / (900 - 600) = 33.3333%
assert_percents_equal(anim.effect.getComputedTiming().duration,
100/3,
'iteration duration before first style change');
assert_equals(getComputedStyle(target).marginLeft, '50px',
'margin-left before style change');
// Step 1: Set the range end programmatically and range start via CSS.
// The start time will be respected since not previously set via the
// animation API.
await runAndWaitForFrameUpdate(() => {
anim.rangeEnd = 'contain 100%';
target.style.animationRangeStart = 'entry 50%';
});
// Animation range does not affect timeline's currentTime.
assert_percents_equal(
anim.timeline.currentTime, 100/6,
'timeline\'s current time after first set of range updates');
assert_percents_equal(
anim.startTime, 100/6,
'animation\'s start time after first set of range updates');
// Scroll position aligns with range start.
assert_percents_equal(
anim.currentTime, 0,
'animation\'s current time after first set of range updates');
// Iteration duration =
// (range end - range start) / (cover 100% - cover 0%) * 100%
// = (800 - 650) / (900 - 600) = 50%
assert_percents_equal(
anim.effect.getComputedTiming().duration, 50,
'iteration duration after first style change');
assert_equals(getComputedStyle(target).marginLeft, '0px',
'margin-left after first set of range updates');
// Step 2: Programmatically set the range start.
// Scroll position is current at entry 50%, thus the animation's current
// time is negative.
await runAndWaitForFrameUpdate(() => {
anim.rangeStart = 'contain 0%';
});
// animation current time =
// (scroll pos - range start) / (cover 100% - cover 0%) * 100%
// = (650 - 700) / (900 - 600) * 100% = -100/6%
assert_percents_equal(
anim.currentTime, -100/6,
'animation\'s current time after second set of range updates');
// Iteration duration =
// (range end - range start) / (cover 100% - cover 0%) * 100%
// = (800 - 700) / (900 - 600) = 33.3333%
assert_percents_equal(
anim.effect.getComputedTiming().duration, 100/3,
'iteration duration after second style change');
assert_equals(getComputedStyle(target).marginLeft, '0px',
'margin-left after second set of range updates');
// Jump to contain / cover 50%
scroller.scrollTop = 750;
await waitForNextFrame();
// animation current time =
// (scroll pos - range start) / (cover 100% - cover 0%) * 100%
// = (750 - 700) / (900 - 600) * 100% = 100/6%
assert_percents_equal(
anim.currentTime, 100/6,
'animation\'s current time after bumping scroll position');
assert_approx_equals(parseFloat(getComputedStyle(target).marginLeft), 50, 0.125);
// Step 3: Try to update the range start via CSS. This change must be
// ignored since previously set programmatically.
await runAndWaitForFrameUpdate(() => {
target.style.animationRangeStart = "entry 50%";
});
assert_percents_equal(
anim.currentTime, 100/6,
'Current time unchanged after change to ignored CSS property');
assert_approx_equals(parseFloat(getComputedStyle(target).marginLeft), 50, 0.125,
'Margin-left unaffected by change to ignored CSS property');
}, 'Animation API call rangeStart overrides animation-range-start');
promise_test(async t => {
const anim = startAnimation(t);
await anim.ready;
scroller.scrollTop = 650;
await waitForNextFrame();
// Step 1: Set the range start programmatically and range end via CSS.
// The start time will be respected since not previously set via the
// animation API.
await runAndWaitForFrameUpdate(() => {
anim.rangeStart = "entry 50%";
target.style.animationRangeEnd = "contain 100%";
});
assert_percents_equal(
anim.timeline.currentTime, 100/6,
'timeline\'s current time after first set of range updates');
assert_percents_equal(
anim.startTime, 100/6,
'animation\'s start time after first set of range updates');
assert_percents_equal(
anim.currentTime, 0,
'animation\'s current time after first set of range updates');
assert_percents_equal(
anim.effect.getComputedTiming().duration, 50,
'iteration duration after first style change');
assert_equals(getComputedStyle(target).marginLeft, "0px",
'margin-left after first set of range updates');
// Step 2: Programmatically set the range.
// Scroll position is current at entry 50%, thus the animation's current
// time is negative.
await runAndWaitForFrameUpdate(() => {
anim.rangeStart = "contain 0%";
anim.rangeEnd = "contain 100%";
});
assert_percents_equal(
anim.currentTime, -100/6,
'animation\'s current time after second set of range updates');
assert_percents_equal(
anim.effect.getComputedTiming().duration, 100/3,
'iteration duration after second style change');
assert_equals(getComputedStyle(target).marginLeft, "0px",
'margin-left after second set of range updates');
// Jump to contain / cover 50%
scroller.scrollTop = 750;
await waitForNextFrame();
assert_percents_equal(
anim.currentTime, 100/6,
'animation\'s current time after bumping scroll position');
assert_approx_equals(parseFloat(getComputedStyle(target).marginLeft), 50, 0.125);
// Step 3: Try to update the range end via CSS. This change must be
// ignored since previously set programmatically.
await runAndWaitForFrameUpdate(() => {
target.style.animationRangeEnd = "cover 100%";
});
assert_percents_equal(
anim.currentTime, 100/6,
'Current time unchanged after change to ignored CSS property');
assert_approx_equals(parseFloat(getComputedStyle(target).marginLeft), 50, 0.125,
'Margin-left unaffected by change to ignored CSS property');
}, 'Animation API call rangeEnd overrides animation-range-end');
}
window.onload = runTest;
</script>
|
