forked from jamesshore/lets_code_javascript
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathhtml_element.js
More file actions
309 lines (249 loc) · 8.43 KB
/
html_element.js
File metadata and controls
309 lines (249 loc) · 8.43 KB
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
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
// Copyright (c) 2013 Titanium I.T. LLC. All rights reserved. See LICENSE.txt for details.
/*global $, jQuery */
(function() {
"use strict";
var browser = require("./browser.js");
var failFast = require("./fail_fast.js");
/* Constructors */
var HtmlElement = module.exports = function(domElement) {
var self = this;
self._domElement = domElement;
self._element = $(domElement);
self._dragDefaultsPrevented = false;
};
HtmlElement.fromHtml = function(html) {
return new HtmlElement($(html)[0]);
};
HtmlElement.fromId = function(id) {
var domElement = document.getElementById(id);
failFast.unlessTrue(domElement !== null, "could not find element with id '" + id + "'");
return new HtmlElement(domElement);
};
/* General event handling */
HtmlElement.prototype.removeAllEventHandlers = function() {
this._element.off();
};
HtmlElement.prototype.preventBrowserDragDefaults = function() {
this._element.on("selectstart", preventDefaults);
this._element.on("mousedown", preventDefaults);
this._element.on("touchstart", preventDefaults);
this._dragDefaultsPrevented = true;
function preventDefaults(event) {
event.preventDefault();
}
};
HtmlElement.prototype.isBrowserDragDefaultsPrevented = function() {
return this._dragDefaultsPrevented;
};
/* Mouse events */
HtmlElement.prototype.triggerMouseClick = triggerMouseEventFn("click");
HtmlElement.prototype.triggerMouseDown = triggerMouseEventFn("mousedown");
HtmlElement.prototype.triggerMouseMove = triggerMouseEventFn("mousemove");
HtmlElement.prototype.triggerMouseLeave = triggerMouseEventFn("mouseleave");
HtmlElement.prototype.triggerMouseUp = triggerMouseEventFn("mouseup");
HtmlElement.prototype.onMouseClick = onMouseEventFn("click");
HtmlElement.prototype.onMouseDown = onMouseEventFn("mousedown");
HtmlElement.prototype.onMouseMove = onMouseEventFn("mousemove");
HtmlElement.prototype.onMouseLeave = onMouseEventFn("mouseleave");
HtmlElement.prototype.onMouseUp = onMouseEventFn("mouseup");
function triggerMouseEventFn(event) {
return function(relativeX, relativeY) {
var pageCoords;
if (relativeX === undefined || relativeY === undefined) {
pageCoords = { x: 0, y: 0 };
}
else {
pageCoords = pageOffset(this, relativeX, relativeY);
}
sendMouseEvent(this, event, pageCoords);
};
}
function onMouseEventFn(event) {
return function(callback) {
this._element.on(event, function(event) {
var pageOffset = { x: event.pageX, y: event.pageY };
callback(pageOffset);
});
};
}
function sendMouseEvent(self, event, pageCoords) {
var jqElement = self._element;
var eventData = new jQuery.Event();
eventData.pageX = pageCoords.x;
eventData.pageY = pageCoords.y;
eventData.type = event;
jqElement.trigger(eventData);
}
/* Touch events */
HtmlElement.prototype.triggerTouchEnd = triggerZeroTouchEventFn("touchend");
HtmlElement.prototype.triggerTouchCancel = triggerZeroTouchEventFn("touchcancel");
HtmlElement.prototype.triggerSingleTouchStart = triggerSingleTouchEventFn("touchstart");
HtmlElement.prototype.triggerSingleTouchMove = triggerSingleTouchEventFn("touchmove");
HtmlElement.prototype.triggerMultiTouchStart = triggerMultiTouchEventFn("touchstart");
HtmlElement.prototype.onTouchEnd = onZeroTouchEventFn("touchend");
HtmlElement.prototype.onTouchCancel = onZeroTouchEventFn("touchcancel");
HtmlElement.prototype.onSingleTouchStart = onSingleTouchEventFn("touchstart");
HtmlElement.prototype.onSingleTouchMove = onSingleTouchEventFn("touchmove");
HtmlElement.prototype.onMultiTouchStart = onMultiTouchEventFn("touchstart");
function triggerZeroTouchEventFn(event) {
return function() {
sendTouchEvent(this, event, document.createTouchList());
};
}
function triggerSingleTouchEventFn(event) {
return function(relativeX, relativeY) {
var touch = createTouch(this, relativeX, relativeY);
sendTouchEvent(this, event, document.createTouchList(touch));
};
}
function triggerMultiTouchEventFn(event) {
return function(relative1X, relative1Y, relative2X, relative2Y) {
var touch1 = createTouch(this, relative1X, relative1Y);
var touch2 = createTouch(this, relative2X, relative2Y);
sendTouchEvent(this, event, document.createTouchList(touch1, touch2));
};
}
function onZeroTouchEventFn(event) {
return function(callback) {
this._element.on(event, function() {
callback();
});
};
}
function onSingleTouchEventFn(eventName) {
return function(callback) {
this._element.on(eventName, function(event) {
var originalEvent = event.originalEvent;
if (originalEvent.touches.length !== 1) return;
var pageX = originalEvent.touches[0].pageX;
var pageY = originalEvent.touches[0].pageY;
var offset = { x: pageX, y: pageY };
callback(offset);
});
};
}
function onMultiTouchEventFn(event) {
return function(callback) {
var self = this;
this._element.on(event, function(event) {
var originalEvent = event.originalEvent;
if (originalEvent.touches.length !== 1) callback();
});
};
}
function sendTouchEvent(self, eventType, touchList) {
var touchEvent = document.createEvent("TouchEvent");
var canBubble = true;
var cancelable = true;
var view = window;
var detail = null; // not sure what this is
var screenX = 0;
var screenY = 0;
var clientX = 0;
var clientY = 0;
var ctrlKey = false;
var altKey = false;
var shiftKey = false;
var metaKey = false;
var touches = touchList;
var targetTouches = touchList;
var changedTouches = touchList;
var scale = 1;
var rotation = 0;
if (browser.usesAndroidInitTouchEventParameterOrder()) {
touchEvent.initTouchEvent(
touches, targetTouches, changedTouches,
eventType,
view,
screenX, screenY,
clientX, clientY,
ctrlKey, altKey, shiftKey, metaKey
);
}
else {
touchEvent.initTouchEvent(
eventType,
canBubble,
cancelable,
view,
detail,
screenX, screenY,
clientX, clientY,
ctrlKey, altKey, shiftKey, metaKey,
touches, targetTouches, changedTouches,
scale, rotation
);
}
var eventData = new jQuery.Event("event");
eventData.type = eventType;
eventData.originalEvent = touchEvent;
self._element.trigger(eventData);
}
function createTouch(self, relativeX, relativeY) {
var offset = pageOffset(self, relativeX, relativeY);
var view = window;
var target = self._element[0];
var identifier = 0;
var pageX = offset.x;
var pageY = offset.y;
var screenX = 0;
var screenY = 0;
return document.createTouch(view, target, identifier, pageX, pageY, screenX, screenY);
}
/* Dimensions, offsets, and positioning */
HtmlElement.prototype.getDimensions = function() {
return {
width: this._element.width(),
height: this._element.height()
};
};
HtmlElement.prototype.relativeOffset = function(pageOffset) {
return relativeOffset(this, pageOffset.x, pageOffset.y);
};
HtmlElement.prototype.pageOffset = function(relativeOffset) {
return pageOffset(this, relativeOffset.x, relativeOffset.y);
};
function relativeOffset(self, pageX, pageY) {
failFastIfStylingPresent(self);
var pageOffset = self._element.offset();
return {
x: pageX - pageOffset.left,
y: pageY - pageOffset.top
};
}
function pageOffset(self, relativeX, relativeY) {
failFastIfStylingPresent(self);
var topLeftOfDrawingArea = self._element.offset();
return {
x: relativeX + topLeftOfDrawingArea.left,
y: relativeY + topLeftOfDrawingArea.top
};
}
function failFastIfStylingPresent(self) {
failFastIfPaddingPresent("top");
failFastIfPaddingPresent("left");
failFastIfBorderPresent("top");
failFastIfBorderPresent("left");
function failFastIfPaddingPresent(side) {
var css = self._element.css("padding-" + side);
if (css !== "0px") throw new Error("Do not apply padding to elements used with relativeOffset() (expected 0px but was " + css + ")");
}
function failFastIfBorderPresent(side) {
var css = self._element.css("border-" + side + "-width");
if (css !== "0px") throw new Error("Do not apply border to elements used with relativeOffset() (expected 0px but was " + css + ")");
}
}
/* DOM Manipulation */
HtmlElement.prototype.append = function(elementToAppend) {
this._element.append(elementToAppend._element);
};
HtmlElement.prototype.appendSelfToBody = function() {
$(document.body).append(this._element);
};
HtmlElement.prototype.remove = function() {
this._element.remove();
};
HtmlElement.prototype.toDomElement = function() {
return this._element[0];
};
}());