-
Notifications
You must be signed in to change notification settings - Fork 0
/
scrubber.js
210 lines (187 loc) · 5.8 KB
/
scrubber.js
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
if (!window.TouchEvent) {
window.TouchEvent = function TouchEvent() {};
}
/**
*
* @param scrubberEle
* @param parentEle
* @param effectorEle
* @param handleClickOnParent
* @param onValueChange
*/
function Scrubber({
scrubberEle,
parentEle,
effectorEle,
config: { handleClickOnParent = false, onValueChange = () => {} } = {},
} = {}) {
const CONSTANTS = {
ERRORS: {
SCRUBBER_PARENT_AND_EFFECTOR_REQUIRED: new Error(
"Scrubber, parent and effector elements are required"
),
},
SEEK_TRANSITION: "all .3s linear",
SEEK_TRANSITION_0: "all 0s linear",
};
const utils = (function utils() {
function getSeekPointAndPercentage(event, parentElement) {
if (!parentElement) return;
const { x: startingXCoordinateOfWaveForm, width: waveFormWidth } =
parentElement.getClientRects()[0];
const xCoordinateOfMouseClick =
event.clientX ?? event.targetTouches?.[0]?.clientX ?? 0;
let seekPoint = xCoordinateOfMouseClick - startingXCoordinateOfWaveForm;
if (seekPoint >= waveFormWidth) seekPoint = waveFormWidth;
if (seekPoint <= 0) seekPoint = 0;
const seekPercentage = (seekPoint / waveFormWidth) * 100;
return { seekPoint, seekPercentage };
}
return { getSeekPointAndPercentage };
})();
const model = (function () {
let elements = {
element: null,
parent: null,
effector: null,
};
let seekPosition = {};
let mouseDownOnScrubber = false;
function setMouseDownOnScrubber(value) {
mouseDownOnScrubber = !!value;
}
function getMouseDownOnScrubber() {
return mouseDownOnScrubber;
}
function setElements(scrubber, parent, effector) {
elements = {
scrubber,
parent,
effector,
};
}
function getElements() {
return elements;
}
function setSeekPosition(seekPoint, seekPercentage) {
seekPosition = {
seekPoint,
seekPercentage,
};
}
function getSeekPosition() {
return seekPosition;
}
return {
setMouseDownOnScrubber,
getMouseDownOnScrubber,
setElements,
getElements,
setSeekPosition,
getSeekPosition,
};
})();
const view = (function (model) {
function updateScrubberUi({ withAnimation = false } = {}) {
const { seekPercentage } = model.getSeekPosition();
const { scrubber, effector } = model.getElements();
const transition = withAnimation
? CONSTANTS.SEEK_TRANSITION
: CONSTANTS.SEEK_TRANSITION_0;
scrubber.style.transition = transition;
effector.style.setProperty("--transition", transition);
scrubber.style.left = `${seekPercentage}%`;
scrubber.setAttribute("data-percentage", seekPercentage.toFixed(1) + "%");
effector.style.setProperty("--dx", `${seekPercentage}%`);
}
return { updateScrubberUi };
})(model);
const controller = (function controller(model, view) {
function init(scrubberEle, parentEle, effectorEle) {
try {
if (!scrubberEle || !parentEle || !effectorEle)
throw CONSTANTS.ERRORS.SCRUBBER_PARENT_AND_EFFECTOR_REQUIRED;
model.setElements(scrubberEle, parentEle, effectorEle);
scrubberEle.addEventListener("mousedown", handleMouseDownOnScrubber);
scrubberEle.addEventListener("touchstart", handleMouseDownOnScrubber);
scrubberEle.addEventListener("mouseup", handleMouseUpOnScrubber);
scrubberEle.addEventListener("touchend", handleMouseUpOnScrubber);
parentEle.addEventListener(
"mousemove",
handleMouseMoveOnScrubberParent
);
parentEle.addEventListener(
"touchmove",
handleMouseMoveOnScrubberParent
);
parentEle.addEventListener(
"mouseleave",
handleMouseLeaveOnScrubberParent
);
if (handleClickOnParent)
parentEle.addEventListener("click", handleClickOnScrubberParent);
} catch (error) {
console.error(error);
}
}
function handleMouseDownOnScrubber() {
try {
model.setMouseDownOnScrubber(true);
} catch (error) {
console.error(error);
}
}
function handleMouseMoveOnScrubberParent(event) {
try {
if (!model.getMouseDownOnScrubber()) return;
if (event instanceof TouchEvent) event.preventDefault();
requestAnimationFrame(() => {
const { parent } = model.getElements();
const { seekPoint, seekPercentage } = utils.getSeekPointAndPercentage(
event,
parent
);
model.setSeekPosition(seekPoint, seekPercentage);
view.updateScrubberUi();
if (typeof onValueChange === "function")
onValueChange(seekPercentage);
});
} catch (error) {
console.error(error);
}
}
function handleClickOnScrubberParent(event) {
try {
requestAnimationFrame(() => {
const { parent } = model.getElements();
const { seekPoint, seekPercentage } = utils.getSeekPointAndPercentage(
event,
parent
);
model.setSeekPosition(seekPoint, seekPercentage);
view.updateScrubberUi({ withAnimation: true });
if (typeof onValueChange === "function")
onValueChange(seekPercentage);
});
} catch (error) {
console.error(error);
}
}
function handleMouseUpOnScrubber() {
try {
model.setMouseDownOnScrubber(false);
} catch (error) {
console.error(error);
}
}
function handleMouseLeaveOnScrubberParent() {
try {
model.setMouseDownOnScrubber(false);
} catch (error) {
console.error(error);
}
}
return { init };
})(model, view);
controller.init(scrubberEle, parentEle, effectorEle);
}