Mercurial > hg > dml-open-vis
comparison src/DML/VendorAssetsBundle/Resources/assets/vega/2.2.6/d3.layout.cloud.js @ 0:493bcb69166c
added public content
author | Daniel Wolff |
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date | Tue, 09 Feb 2016 20:54:02 +0100 |
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-1:000000000000 | 0:493bcb69166c |
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1 // Word cloud layout by Jason Davies, http://www.jasondavies.com/word-cloud/ | |
2 // Algorithm due to Jonathan Feinberg, http://static.mrfeinberg.com/bv_ch03.pdf | |
3 (function() { | |
4 | |
5 if (typeof define === "function" && define.amd) define(["d3"], cloud); | |
6 else cloud(this.d3); | |
7 | |
8 function cloud(d3) { | |
9 d3.layout.cloud = function cloud() { | |
10 var size = [256, 256], | |
11 text = cloudText, | |
12 font = cloudFont, | |
13 fontSize = cloudFontSize, | |
14 fontStyle = cloudFontNormal, | |
15 fontWeight = cloudFontNormal, | |
16 rotate = cloudRotate, | |
17 padding = cloudPadding, | |
18 spiral = archimedeanSpiral, | |
19 words = [], | |
20 timeInterval = Infinity, | |
21 event = d3.dispatch("word", "end"), | |
22 timer = null, | |
23 random = Math.random, | |
24 cloud = {}; | |
25 | |
26 cloud.start = function() { | |
27 var board = zeroArray((size[0] >> 5) * size[1]), | |
28 bounds = null, | |
29 n = words.length, | |
30 i = -1, | |
31 tags = [], | |
32 data = words.map(function(d, i) { | |
33 d.text = text.call(this, d, i); | |
34 d.font = font.call(this, d, i); | |
35 d.style = fontStyle.call(this, d, i); | |
36 d.weight = fontWeight.call(this, d, i); | |
37 d.rotate = rotate.call(this, d, i); | |
38 d.size = ~~fontSize.call(this, d, i); | |
39 d.padding = padding.call(this, d, i); | |
40 return d; | |
41 }).sort(function(a, b) { return b.size - a.size; }); | |
42 | |
43 if (timer) clearInterval(timer); | |
44 timer = setInterval(step, 0); | |
45 step(); | |
46 | |
47 return cloud; | |
48 | |
49 function step() { | |
50 var start = Date.now(); | |
51 while (Date.now() - start < timeInterval && ++i < n && timer) { | |
52 var d = data[i]; | |
53 d.x = (size[0] * (random() + .5)) >> 1; | |
54 d.y = (size[1] * (random() + .5)) >> 1; | |
55 cloudSprite(d, data, i); | |
56 if (d.hasText && place(board, d, bounds)) { | |
57 tags.push(d); | |
58 event.word(d); | |
59 if (bounds) cloudBounds(bounds, d); | |
60 else bounds = [{x: d.x + d.x0, y: d.y + d.y0}, {x: d.x + d.x1, y: d.y + d.y1}]; | |
61 // Temporary hack | |
62 d.x -= size[0] >> 1; | |
63 d.y -= size[1] >> 1; | |
64 } | |
65 } | |
66 if (i >= n) { | |
67 cloud.stop(); | |
68 event.end(tags, bounds); | |
69 } | |
70 } | |
71 } | |
72 | |
73 cloud.stop = function() { | |
74 if (timer) { | |
75 clearInterval(timer); | |
76 timer = null; | |
77 } | |
78 return cloud; | |
79 }; | |
80 | |
81 function place(board, tag, bounds) { | |
82 var perimeter = [{x: 0, y: 0}, {x: size[0], y: size[1]}], | |
83 startX = tag.x, | |
84 startY = tag.y, | |
85 maxDelta = Math.sqrt(size[0] * size[0] + size[1] * size[1]), | |
86 s = spiral(size), | |
87 dt = random() < .5 ? 1 : -1, | |
88 t = -dt, | |
89 dxdy, | |
90 dx, | |
91 dy; | |
92 | |
93 while (dxdy = s(t += dt)) { | |
94 dx = ~~dxdy[0]; | |
95 dy = ~~dxdy[1]; | |
96 | |
97 if (Math.min(Math.abs(dx), Math.abs(dy)) >= maxDelta) break; | |
98 | |
99 tag.x = startX + dx; | |
100 tag.y = startY + dy; | |
101 | |
102 if (tag.x + tag.x0 < 0 || tag.y + tag.y0 < 0 || | |
103 tag.x + tag.x1 > size[0] || tag.y + tag.y1 > size[1]) continue; | |
104 // TODO only check for collisions within current bounds. | |
105 if (!bounds || !cloudCollide(tag, board, size[0])) { | |
106 if (!bounds || collideRects(tag, bounds)) { | |
107 var sprite = tag.sprite, | |
108 w = tag.width >> 5, | |
109 sw = size[0] >> 5, | |
110 lx = tag.x - (w << 4), | |
111 sx = lx & 0x7f, | |
112 msx = 32 - sx, | |
113 h = tag.y1 - tag.y0, | |
114 x = (tag.y + tag.y0) * sw + (lx >> 5), | |
115 last; | |
116 for (var j = 0; j < h; j++) { | |
117 last = 0; | |
118 for (var i = 0; i <= w; i++) { | |
119 board[x + i] |= (last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0); | |
120 } | |
121 x += sw; | |
122 } | |
123 delete tag.sprite; | |
124 return true; | |
125 } | |
126 } | |
127 } | |
128 return false; | |
129 } | |
130 | |
131 cloud.timeInterval = function(_) { | |
132 return arguments.length ? (timeInterval = _ == null ? Infinity : _, cloud) : timeInterval; | |
133 }; | |
134 | |
135 cloud.words = function(_) { | |
136 return arguments.length ? (words = _, cloud) : words; | |
137 }; | |
138 | |
139 cloud.size = function(_) { | |
140 return arguments.length ? (size = [+_[0], +_[1]], cloud) : size; | |
141 }; | |
142 | |
143 cloud.font = function(_) { | |
144 return arguments.length ? (font = d3.functor(_), cloud) : font; | |
145 }; | |
146 | |
147 cloud.fontStyle = function(_) { | |
148 return arguments.length ? (fontStyle = d3.functor(_), cloud) : fontStyle; | |
149 }; | |
150 | |
151 cloud.fontWeight = function(_) { | |
152 return arguments.length ? (fontWeight = d3.functor(_), cloud) : fontWeight; | |
153 }; | |
154 | |
155 cloud.rotate = function(_) { | |
156 return arguments.length ? (rotate = d3.functor(_), cloud) : rotate; | |
157 }; | |
158 | |
159 cloud.text = function(_) { | |
160 return arguments.length ? (text = d3.functor(_), cloud) : text; | |
161 }; | |
162 | |
163 cloud.spiral = function(_) { | |
164 return arguments.length ? (spiral = spirals[_] || _, cloud) : spiral; | |
165 }; | |
166 | |
167 cloud.fontSize = function(_) { | |
168 return arguments.length ? (fontSize = d3.functor(_), cloud) : fontSize; | |
169 }; | |
170 | |
171 cloud.padding = function(_) { | |
172 return arguments.length ? (padding = d3.functor(_), cloud) : padding; | |
173 }; | |
174 | |
175 cloud.random = function(_) { | |
176 return arguments.length ? (random = _, cloud) : random; | |
177 }; | |
178 | |
179 return d3.rebind(cloud, event, "on"); | |
180 }; | |
181 | |
182 function cloudText(d) { | |
183 return d.text; | |
184 } | |
185 | |
186 function cloudFont() { | |
187 return "serif"; | |
188 } | |
189 | |
190 function cloudFontNormal() { | |
191 return "normal"; | |
192 } | |
193 | |
194 function cloudFontSize(d) { | |
195 return Math.sqrt(d.value); | |
196 } | |
197 | |
198 function cloudRotate() { | |
199 return (~~(Math.random() * 6) - 3) * 30; | |
200 } | |
201 | |
202 function cloudPadding() { | |
203 return 1; | |
204 } | |
205 | |
206 // Fetches a monochrome sprite bitmap for the specified text. | |
207 // Load in batches for speed. | |
208 function cloudSprite(d, data, di) { | |
209 if (d.sprite) return; | |
210 c.clearRect(0, 0, (cw << 5) / ratio, ch / ratio); | |
211 var x = 0, | |
212 y = 0, | |
213 maxh = 0, | |
214 n = data.length; | |
215 --di; | |
216 while (++di < n) { | |
217 d = data[di]; | |
218 c.save(); | |
219 c.font = d.style + " " + d.weight + " " + ~~((d.size + 1) / ratio) + "px " + d.font; | |
220 var w = c.measureText(d.text + "m").width * ratio, | |
221 h = d.size << 1; | |
222 if (d.rotate) { | |
223 var sr = Math.sin(d.rotate * cloudRadians), | |
224 cr = Math.cos(d.rotate * cloudRadians), | |
225 wcr = w * cr, | |
226 wsr = w * sr, | |
227 hcr = h * cr, | |
228 hsr = h * sr; | |
229 w = (Math.max(Math.abs(wcr + hsr), Math.abs(wcr - hsr)) + 0x1f) >> 5 << 5; | |
230 h = ~~Math.max(Math.abs(wsr + hcr), Math.abs(wsr - hcr)); | |
231 } else { | |
232 w = (w + 0x1f) >> 5 << 5; | |
233 } | |
234 if (h > maxh) maxh = h; | |
235 if (x + w >= (cw << 5)) { | |
236 x = 0; | |
237 y += maxh; | |
238 maxh = 0; | |
239 } | |
240 if (y + h >= ch) break; | |
241 c.translate((x + (w >> 1)) / ratio, (y + (h >> 1)) / ratio); | |
242 if (d.rotate) c.rotate(d.rotate * cloudRadians); | |
243 c.fillText(d.text, 0, 0); | |
244 if (d.padding) c.lineWidth = 2 * d.padding, c.strokeText(d.text, 0, 0); | |
245 c.restore(); | |
246 d.width = w; | |
247 d.height = h; | |
248 d.xoff = x; | |
249 d.yoff = y; | |
250 d.x1 = w >> 1; | |
251 d.y1 = h >> 1; | |
252 d.x0 = -d.x1; | |
253 d.y0 = -d.y1; | |
254 d.hasText = true; | |
255 x += w; | |
256 } | |
257 var pixels = c.getImageData(0, 0, (cw << 5) / ratio, ch / ratio).data, | |
258 sprite = []; | |
259 while (--di >= 0) { | |
260 d = data[di]; | |
261 if (!d.hasText) continue; | |
262 var w = d.width, | |
263 w32 = w >> 5, | |
264 h = d.y1 - d.y0; | |
265 // Zero the buffer | |
266 for (var i = 0; i < h * w32; i++) sprite[i] = 0; | |
267 x = d.xoff; | |
268 if (x == null) return; | |
269 y = d.yoff; | |
270 var seen = 0, | |
271 seenRow = -1; | |
272 for (var j = 0; j < h; j++) { | |
273 for (var i = 0; i < w; i++) { | |
274 var k = w32 * j + (i >> 5), | |
275 m = pixels[((y + j) * (cw << 5) + (x + i)) << 2] ? 1 << (31 - (i % 32)) : 0; | |
276 sprite[k] |= m; | |
277 seen |= m; | |
278 } | |
279 if (seen) seenRow = j; | |
280 else { | |
281 d.y0++; | |
282 h--; | |
283 j--; | |
284 y++; | |
285 } | |
286 } | |
287 d.y1 = d.y0 + seenRow; | |
288 d.sprite = sprite.slice(0, (d.y1 - d.y0) * w32); | |
289 } | |
290 } | |
291 | |
292 // Use mask-based collision detection. | |
293 function cloudCollide(tag, board, sw) { | |
294 sw >>= 5; | |
295 var sprite = tag.sprite, | |
296 w = tag.width >> 5, | |
297 lx = tag.x - (w << 4), | |
298 sx = lx & 0x7f, | |
299 msx = 32 - sx, | |
300 h = tag.y1 - tag.y0, | |
301 x = (tag.y + tag.y0) * sw + (lx >> 5), | |
302 last; | |
303 for (var j = 0; j < h; j++) { | |
304 last = 0; | |
305 for (var i = 0; i <= w; i++) { | |
306 if (((last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0)) | |
307 & board[x + i]) return true; | |
308 } | |
309 x += sw; | |
310 } | |
311 return false; | |
312 } | |
313 | |
314 function cloudBounds(bounds, d) { | |
315 var b0 = bounds[0], | |
316 b1 = bounds[1]; | |
317 if (d.x + d.x0 < b0.x) b0.x = d.x + d.x0; | |
318 if (d.y + d.y0 < b0.y) b0.y = d.y + d.y0; | |
319 if (d.x + d.x1 > b1.x) b1.x = d.x + d.x1; | |
320 if (d.y + d.y1 > b1.y) b1.y = d.y + d.y1; | |
321 } | |
322 | |
323 function collideRects(a, b) { | |
324 return a.x + a.x1 > b[0].x && a.x + a.x0 < b[1].x && a.y + a.y1 > b[0].y && a.y + a.y0 < b[1].y; | |
325 } | |
326 | |
327 function archimedeanSpiral(size) { | |
328 var e = size[0] / size[1]; | |
329 return function(t) { | |
330 return [e * (t *= .1) * Math.cos(t), t * Math.sin(t)]; | |
331 }; | |
332 } | |
333 | |
334 function rectangularSpiral(size) { | |
335 var dy = 4, | |
336 dx = dy * size[0] / size[1], | |
337 x = 0, | |
338 y = 0; | |
339 return function(t) { | |
340 var sign = t < 0 ? -1 : 1; | |
341 // See triangular numbers: T_n = n * (n + 1) / 2. | |
342 switch ((Math.sqrt(1 + 4 * sign * t) - sign) & 3) { | |
343 case 0: x += dx; break; | |
344 case 1: y += dy; break; | |
345 case 2: x -= dx; break; | |
346 default: y -= dy; break; | |
347 } | |
348 return [x, y]; | |
349 }; | |
350 } | |
351 | |
352 // TODO reuse arrays? | |
353 function zeroArray(n) { | |
354 var a = [], | |
355 i = -1; | |
356 while (++i < n) a[i] = 0; | |
357 return a; | |
358 } | |
359 | |
360 var cloudRadians = Math.PI / 180, | |
361 cw = 1 << 11 >> 5, | |
362 ch = 1 << 11, | |
363 canvas, | |
364 ratio = 1; | |
365 | |
366 if (typeof document !== "undefined") { | |
367 canvas = document.createElement("canvas"); | |
368 canvas.width = 1; | |
369 canvas.height = 1; | |
370 ratio = Math.sqrt(canvas.getContext("2d").getImageData(0, 0, 1, 1).data.length >> 2); | |
371 canvas.width = (cw << 5) / ratio; | |
372 canvas.height = ch / ratio; | |
373 } else { | |
374 // Attempt to use node-canvas. | |
375 canvas = new Canvas(cw << 5, ch); | |
376 } | |
377 | |
378 var c = canvas.getContext("2d"), | |
379 spirals = { | |
380 archimedean: archimedeanSpiral, | |
381 rectangular: rectangularSpiral | |
382 }; | |
383 c.fillStyle = c.strokeStyle = "red"; | |
384 c.textAlign = "center"; | |
385 } | |
386 | |
387 })(); |