-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathjquery.arctext.js
381 lines (281 loc) · 12.1 KB
/
jquery.arctext.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
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
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
/**
* Arctext.js
* A jQuery plugin for curved text
* http://www.codrops.com
*
* Copyright 2011, Pedro Botelho / Codrops
* Free to use under the MIT license.
*
* Date: Mon Jan 23 2012
*/
(function( $, undefined ) {
/*!
* FitText.js 1.0
*
* Copyright 2011, Dave Rupert http://daverupert.com
* Released under the WTFPL license
* http://sam.zoy.org/wtfpl/
*
* Date: Thu May 05 14:23:00 2011 -0600
*/
$.fn.fitText = function( kompressor, options ) {
var settings = {
'minFontSize' : Number.NEGATIVE_INFINITY,
'maxFontSize' : Number.POSITIVE_INFINITY
};
return this.each(function() {
var $this = $(this); // store the object
var compressor = kompressor || 1; // set the compressor
if ( options ) {
$.extend( settings, options );
}
// Resizer() resizes items based on the object width divided by the compressor * 10
var resizer = function () {
$this.css('font-size', Math.max(Math.min($this.width() / (compressor*10), parseFloat(settings.maxFontSize)), parseFloat(settings.minFontSize)));
};
// Call once to set.
resizer();
// Call on resize. Opera debounces their resize by default.
$(window).resize(resizer);
});
};
/*
* Lettering plugin
*
* changed injector function:
* add for empty chars.
*/
function injector(t, splitter, klass, after) {
var a = t.text().split(splitter), inject = '', emptyclass;
if (a.length) {
$(a).each(function(i, item) {
emptyclass = '';
if(item === ' ') {
emptyclass = ' empty';
item=' ';
}
inject += '<span class="'+klass+(i+1)+emptyclass+'">'+item+'</span>'+after;
});
t.empty().append(inject);
}
}
var methods = {
init : function() {
return this.each(function() {
injector($(this), '', 'char', '');
});
},
words : function() {
return this.each(function() {
injector($(this), ' ', 'word', ' ');
});
},
lines : function() {
return this.each(function() {
var r = "eefec303079ad17405c889e092e105b0";
// Because it's hard to split a <br/> tag consistently across browsers,
// (*ahem* IE *ahem*), we replaces all <br/> instances with an md5 hash
// (of the word "split"). If you're trying to use this plugin on that
// md5 hash string, it will fail because you're being ridiculous.
injector($(this).children("br").replaceWith(r).end(), r, 'line', '');
});
}
};
$.fn.lettering = function( method ) {
// Method calling logic
if ( method && methods[method] ) {
return methods[ method ].apply( this, [].slice.call( arguments, 1 ));
} else if ( method === 'letters' || ! method ) {
return methods.init.apply( this, [].slice.call( arguments, 0 ) ); // always pass an array
}
$.error( 'Method ' + method + ' does not exist on jQuery.lettering' );
return this;
};
/*
* Arctext object.
*/
$.Arctext = function( options, element ) {
this.$el = $( element );
this._init( options );
};
$.Arctext.defaults = {
radius : 0, // the minimum value allowed is half of the word length. if set to -1, the word will be straight.
dir : 1, // 1: curve is down, -1: curve is up.
rotate : true, // if true each letter will be rotated.
fitText : false // if you wanna try out the fitText plugin (http://fittextjs.com/) set this to true. Don't forget the wrapper should be fluid.
};
$.Arctext.prototype = {
_init : function( options ) {
this.options = $.extend( true, {}, $.Arctext.defaults, options );
// apply the lettering plugin.
this._applyLettering();
this.$el.data( 'arctext', true );
// calculate values
this._calc();
// apply transformation.
this._rotateWord();
// load the events
this._loadEvents();
},
_applyLettering : function() {
this.$el.lettering();
if( this.options.fitText )
this.$el.fitText();
this.$letters = this.$el.find('span').css('display', 'inline-block');
},
_calc : function() {
if( this.options.radius === -1 )
return false;
// calculate word / arc sizes & distances.
this._calcBase();
// get final values for each letter.
this._calcLetters();
},
_calcBase : function() {
// total word width (sum of letters widths)
this.dtWord = 0;
var _self = this;
this.$letters.each( function(i) {
var $letter = $(this),
letterWidth = $letter.outerWidth( true );
_self.dtWord += letterWidth;
// save the center point of each letter:
$letter.data( 'center', _self.dtWord - letterWidth / 2 );
});
// the middle point of the word.
var centerWord = this.dtWord / 2;
// check radius : the minimum value allowed is half of the word length.
if( this.options.radius < centerWord )
this.options.radius = centerWord;
// total arc segment length, where the letters will be placed.
this.dtArcBase = this.dtWord;
// calculate the arc (length) that goes from the beginning of the first letter (x=0) to the end of the last letter (x=this.dtWord).
// first lets calculate the angle for the triangle with base = this.dtArcBase and the other two sides = radius.
var angle = 2 * Math.asin( this.dtArcBase / ( 2 * this.options.radius ) );
// given the formula: L(ength) = R(adius) x A(ngle), we calculate our arc length.
this.dtArc = this.options.radius * angle;
},
_calcLetters : function() {
var _self = this,
iteratorX = 0;
this.$letters.each( function(i) {
var $letter = $(this),
// calculate each letter's semi arc given the percentage of each letter on the original word.
dtArcLetter = ( $letter.outerWidth( true ) / _self.dtWord ) * _self.dtArc,
// angle for the dtArcLetter given our radius.
beta = dtArcLetter / _self.options.radius,
// distance from the middle point of the semi arc's chord to the center of the circle.
// this is going to be the place where the letter will be positioned.
h = _self.options.radius * ( Math.cos( beta / 2 ) ),
// angle formed by the x-axis and the left most point of the chord.
alpha = Math.acos( ( _self.dtWord / 2 - iteratorX ) / _self.options.radius ),
// angle formed by the x-axis and the right most point of the chord.
theta = alpha + beta / 2,
// distances of the sides of the triangle formed by h and the orthogonal to the x-axis.
x = Math.cos( theta ) * h,
y = Math.sin( theta ) * h,
// the value for the coordinate x of the middle point of the chord.
xpos = iteratorX + Math.abs( _self.dtWord / 2 - x - iteratorX ),
// finally, calculate how much to translate each letter, given its center point.
// also calculate the angle to rotate the letter accordingly.
xval = 0| xpos - $letter.data( 'center' ),
yval = 0| _self.options.radius - y,
angle = ( _self.options.rotate ) ? 0| -Math.asin( x / _self.options.radius ) * ( 180 / Math.PI ) : 0;
// the iteratorX will be positioned on the second point of each semi arc
iteratorX = 2 * xpos - iteratorX;
// save these values
$letter.data({
x : xval,
y : ( _self.options.dir === 1 ) ? yval : -yval,
a : ( _self.options.dir === 1 ) ? angle : -angle
});
});
},
_rotateWord : function( animation ) {
if( !this.$el.data('arctext') ) return false;
var _self = this;
this.$letters.each( function(i) {
var $letter = $(this),
transformation = ( _self.options.radius === -1 ) ? 'none' : 'translateX(' + $letter.data('x') + 'px) translateY(' + $letter.data('y') + 'px) rotate(' + $letter.data('a') + 'deg)',
transition = ( animation ) ? 'all ' + ( animation.speed || 0 ) + 'ms ' + ( animation.easing || 'linear' ) : 'none';
$letter.css({
'-webkit-transition' : transition,
'-moz-transition' : transition,
'-o-transition' : transition,
'-ms-transition' : transition,
'transition' : transition
})
.css({
'-webkit-transform' : transformation,
'-moz-transform' : transformation,
'-o-transform' : transformation,
'-ms-transform' : transformation,
'transform' : transformation
});
});
},
_loadEvents : function() {
if( this.options.fitText ) {
var _self = this;
$(window).on( 'resize.arctext', function() {
_self._calc();
// apply transformation.
_self._rotateWord();
});
}
},
set : function( opts ) {
if( !opts.radius &&
!opts.dir &&
opts.rotate === 'undefined' ) {
return false;
}
this.options.radius = opts.radius || this.options.radius;
this.options.dir = opts.dir || this.options.dir;
if( opts.rotate !== undefined ) {
this.options.rotate = opts.rotate;
}
this._calc();
this._rotateWord( opts.animation );
},
destroy : function() {
this.options.radius = -1;
this._rotateWord();
this.$letters.removeData('x y a center');
this.$el.removeData('arctext');
$(window).off('.arctext');
}
};
var logError = function( message ) {
if ( this.console ) {
console.error( message );
}
};
$.fn.arctext = function( options ) {
if ( typeof options === 'string' ) {
var args = Array.prototype.slice.call( arguments, 1 );
this.each(function() {
var instance = $.data( this, 'arctext' );
if ( !instance ) {
logError( "cannot call methods on arctext prior to initialization; " +
"attempted to call method '" + options + "'" );
return;
}
if ( !$.isFunction( instance[options] ) || options.charAt(0) === "_" ) {
logError( "no such method '" + options + "' for arctext instance" );
return;
}
instance[ options ].apply( instance, args );
});
}
else {
this.each(function() {
var instance = $.data( this, 'arctext' );
if ( !instance ) {
$.data( this, 'arctext', new $.Arctext( options, this ) );
}
});
}
return this;
};
})( jQuery );