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 function cloud() { 5 var size = [256, 256], 6 text = cloudText, 7 font = cloudFont, 8 fontSize = cloudFontSize, 9 fontStyle = cloudFontNormal, 10 fontWeight = cloudFontNormal, 11 rotate = cloudRotate, 12 padding = cloudPadding, 13 spiral = archimedeanSpiral, 14 words = [], 15 timeInterval = Infinity, 16 event = d3.dispatch("word", "end"), 17 timer = null, 18 cloud = {}; 19 20 cloud.start = function() { 21 var board = zeroArray((size[0] >> 5) * size[1]), 22 bounds = null, 23 n = words.length, 24 i = -1, 25 tags = [], 26 data = words.map(function(d, i) { 27 d.text = text.call(this, d, i); 28 d.font = font.call(this, d, i); 29 d.style = fontStyle.call(this, d, i); 30 d.weight = fontWeight.call(this, d, i); 31 d.rotate = rotate.call(this, d, i); 32 d.size = ~~fontSize.call(this, d, i); 33 d.padding = padding.call(this, d, i); 34 return d; 35 }).sort(function(a, b) { return b.size - a.size; }); 36 37 if (timer) clearInterval(timer); 38 timer = setInterval(step, 0); 39 // step(); 40 return cloud; 41 42 function step() { 43 44 var start = +new Date, 45 d; 46 while (+new Date - start < timeInterval && ++i < n && timer) { 47 if(i==0) 48 { 49 d = data[i]; 50 d.x = (size[0] * (Math.random() + .5)) >> 1; 51 d.y = (size[1] * (Math.random() + .5)) >> 1; 52 53 cloudSprite(d, data, i); 54 55 if (d.hasText && place(board, d, bounds)) { 56 tags.push(d); 57 event.word(d); 58 if (bounds) cloudBounds(bounds, d); 59 else bounds = [{x: d.x + d.x0, y: d.y + d.y0}, {x: d.x + d.x1, y: d.y + d.y1}]; 60 // Temporary hack 61 d.x -= size[0] >> 1; 62 d.y -= size[1] >> 1; 63 } 64 } 65 else 66 { 67 d = data[i]; 68 d.x = (size[0] * (Math.random() + .5)) >> 1; 69 d.y = (size[1] * (Math.random() + .5)) >> 1; 70 cloudSprite(d, data, i); 71 if (d.hasText && place(board, d, bounds)) { 72 tags.push(d); 73 event.word(d); 74 if (bounds) cloudBounds(bounds, d); 75 else bounds = [{x: d.x + d.x0, y: d.y + d.y0}, {x: d.x + d.x1, y: d.y + d.y1}]; 76 // Temporary hack 77 d.x -= size[0] >> 1; 78 d.y -= size[1] >> 1; 79 } 80 } 81 } 82 if (i >= n) { 83 cloud.stop(); 84 event.end(tags, bounds); 85 } 86 } 87 } 88 89 cloud.stop = function() { 90 if (timer) { 91 clearInterval(timer); 92 timer = null; 93 } 94 return cloud; 95 }; 96 97 cloud.timeInterval = function(x) { 98 if (!arguments.length) return timeInterval; 99 timeInterval = x == null ? Infinity : x; 100 return cloud; 101 }; 102 103 function place(board, tag, bounds) { 104 var perimeter = [{x: 0, y: 0}, {x: size[0], y: size[1]}], 105 startX = tag.x, 106 startY = tag.y, 107 maxDelta = Math.sqrt(size[0] * size[0] + size[1] * size[1]), 108 s = spiral(size), 109 dt = Math.random() < .5 ? 1 : -1, 110 t = -dt, 111 dxdy, 112 dx, 113 dy; 114 115 while (dxdy = s(t += dt)) { 116 dx = ~~dxdy[0]; 117 dy = ~~dxdy[1]; 118 119 if (Math.min(dx, dy) > maxDelta) break; 120 121 tag.x = startX + dx; 122 tag.y = startY + dy; 123 124 if (tag.x + tag.x0 < 0 || tag.y + tag.y0 < 0 || 125 tag.x + tag.x1 > size[0] || tag.y + tag.y1 > size[1]) continue;
126 // TODO only check for collisions within current bounds. 127 if (!bounds || !cloudCollide(tag, board, size[0])) { 128 if (!bounds || collideRects(tag, bounds)) { 129 var sprite = tag.sprite, 130 w = tag.width >> 5, 131 sw = size[0] >> 5, 132 lx = tag.x - (w << 4), 133 sx = lx & 0x7f, 134 msx = 32 - sx, 135 h = tag.y1 - tag.y0, 136 x = (tag.y + tag.y0) * sw + (lx >> 5), 137 last; 138 for (var j = 0; j < h; j++) { 139 last = 0; 140 for (var i = 0; i <= w; i++) { 141 board[x + i] |= (last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0); 142 } 143 x += sw; 144 } 145 delete tag.sprite; 146 return true; 147 } 148 } 149 } 150 return false; 151 } 152 153 cloud.words = function(x) { 154 if (!arguments.length) return words; 155 words = x; 156 return cloud; 157 }; 158 159 cloud.size = function(x) { 160 if (!arguments.length) return size; 161 size = [+x[0], +x[1]]; 162 return cloud; 163 }; 164 165 cloud.font = function(x) { 166 if (!arguments.length) return font; 167 font = d3.functor(x); 168 return cloud; 169 }; 170 171 cloud.fontStyle = function(x) { 172 if (!arguments.length) return fontStyle; 173 fontStyle = d3.functor(x); 174 return cloud; 175 }; 176 177 cloud.fontWeight = function(x) { 178 if (!arguments.length) return fontWeight; 179 fontWeight = d3.functor(x); 180 return cloud; 181 }; 182 183 cloud.rotate = function(x) { 184 if (!arguments.length) return rotate; 185 rotate = d3.functor(x); 186 return cloud; 187 }; 188 189 cloud.text = function(x) { 190 if (!arguments.length) return text; 191 text = d3.functor(x); 192 return cloud; 193 }; 194 195 cloud.spiral = function(x) { 196 alert(spiral) 197 if (!arguments.length) return spiral; 198 spiral = spirals[x + ""] || x; 199 return cloud; 200 }; 201 202 cloud.fontSize = function(x) { 203 if (!arguments.length) return fontSize; 204 fontSize = d3.functor(x); 205 return cloud; 206 }; 207 208 cloud.padding = function(x) { 209 if (!arguments.length) return padding; 210 padding = d3.functor(x); 211 return cloud; 212 }; 213 214 return d3.rebind(cloud, event, "on"); 215 } 216 217 function cloudText(d) { 218 return d.text; 219 } 220 221 function cloudFont() { 222 return "serif"; 223 } 224 225 function cloudFontNormal() { 226 return "normal"; 227 } 228 229 function cloudFontSize(d) { 230 return Math.sqrt(d.value); 231 } 232 233 function cloudRotate() { 234 return (~~(Math.random() * 6) - 3) * 30; 235 } 236 237 function cloudPadding() { 238 return 3; 239 } 240 241 // Fetches a monochrome sprite bitmap for the specified text. 242 // Load in batches for speed. 243 function cloudSprite(d, data, di) { 244 if (d.sprite) return; 245 c.clearRect(0, 0, (cw << 5) / ratio, ch / ratio); 246 var x = 0, 247 y = 0, 248 maxh = 0, 249 n = data.length; 250 --di; 251 while (++di < n) { 252 d = data[di]; 253 c.save(); 254 c.font = d.style + " " + d.weight + " " + ~~((d.size + 1) / ratio) + "px " + d.font; 255 var w = c.measureText(d.text + "m").width * ratio, 256 h = d.size << 1; 257 if (d.rotate) { 258 var sr = Math.sin(d.rotate * cloudRadians),
vendor: 5,429 bytes, lines 259-424
259 cr = Math.cos(d.rotate * cloudRadians), 260 wcr = w * cr, 261 wsr = w * sr, 262 hcr = h * cr, 263 hsr = h * sr; 264 w = (Math.max(Math.abs(wcr + hsr), Math.abs(wcr - hsr)) + 0x1f) >> 5 << 5; 265 h = ~~Math.max(Math.abs(wsr + hcr), Math.abs(wsr - hcr)); 266 } else { 267 w = (w + 0x1f) >> 5 << 5; 268 } 269 if (h > maxh) maxh = h; 270 if (x + w >= (cw << 5)) { 271 x = 0; 272 y += maxh; 273 maxh = 0; 274 } 275 if (y + h >= ch) break; 276 c.translate((x + (w >> 1)) / ratio, (y + (h >> 1)) / ratio); 277 if (d.rotate) c.rotate(d.rotate * cloudRadians); 278 c.fillText(d.text, 0, 0); 279 if (d.padding) c.lineWidth = 2 * d.padding, c.strokeText(d.text, 0, 0); 280 c.restore(); 281 d.width = w; 282 d.height = h; 283 d.xoff = x; 284 d.yoff = y; 285 d.x1 = w >> 1; 286 d.y1 = h >> 1; 287 d.x0 = -d.x1; 288 d.y0 = -d.y1; 289 d.hasText = true; 290 x += w; 291 } 292 var pixels = c.getImageData(0, 0, (cw << 5) / ratio, ch / ratio).data, 293 sprite = []; 294 while (--di >= 0) { 295 d = data[di]; 296 if (!d.hasText) continue; 297 var w = d.width, 298 w32 = w >> 5, 299 h = d.y1 - d.y0; 300 // Zero the buffer 301 for (var i = 0; i < h * w32; i++) sprite[i] = 0; 302 x = d.xoff; 303 if (x == null) return; 304 y = d.yoff; 305 var seen = 0, 306 seenRow = -1; 307 for (var j = 0; j < h; j++) { 308 for (var i = 0; i < w; i++) { 309 var k = w32 * j + (i >> 5), 310 m = pixels[((y + j) * (cw << 5) + (x + i)) << 2] ? 1 << (31 - (i % 32)) : 0; 311 sprite[k] |= m; 312 seen |= m; 313 } 314 if (seen) seenRow = j; 315 else { 316 d.y0++; 317 h--; 318 j--; 319 y++; 320 } 321 } 322 d.y1 = d.y0 + seenRow; 323 d.sprite = sprite.slice(0, (d.y1 - d.y0) * w32); 324 } 325 } 326 327 // Use mask-based collision detection. 328 function cloudCollide(tag, board, sw) { 329 sw >>= 5; 330 var sprite = tag.sprite, 331 w = tag.width >> 5, 332 lx = tag.x - (w << 4), 333 sx = lx & 0x7f, 334 msx = 32 - sx, 335 h = tag.y1 - tag.y0, 336 x = (tag.y + tag.y0) * sw + (lx >> 5), 337 last; 338 for (var j = 0; j < h; j++) { 339 last = 0; 340 for (var i = 0; i <= w; i++) { 341 if (((last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0)) 342 & board[x + i]) return true; 343 } 344 x += sw; 345 } 346 return false; 347 } 348 349 function cloudBounds(bounds, d) { 350 var b0 = bounds[0], 351 b1 = bounds[1]; 352 if (d.x + d.x0 < b0.x) b0.x = d.x + d.x0; 353 if (d.y + d.y0 < b0.y) b0.y = d.y + d.y0; 354 if (d.x + d.x1 > b1.x) b1.x = d.x + d.x1; 355 if (d.y + d.y1 > b1.y) b1.y = d.y + d.y1; 356 } 357 358 function collideRects(a, b) { 359 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; 360 } 361 362 function archimedeanSpiral(size) { 363 var e = size[0] / size[1]; 364 return function(t) { 365 return [e * (t *= .1) * Math.cos(t), t * Math.sin(t)]; 366 }; 367 } 368 369 function rectangularSpiral(size) { 370 var dy = 4, 371 dx = dy * size[0] / size[1], 372 x = 0, 373 y = 0; 374 return function(t) { 375 var sign = t < 0 ? -1 : 1; 376 // See triangular numbers: T_n = n * (n + 1) / 2. 377 switch ((Math.sqrt(1 + 4 * sign * t) - sign) & 3) { 378 case 0: x += dx; break; 379 case 1: y += dy; break; 380 case 2: x -= dx; break; 381 default: y -= dy; break; 382 } 383 return [x, y]; 384 }; 385 } 386 387 // TODO reuse arrays? 388 function zeroArray(n) { 389 var a = [], 390 i = -1; 391 while (++i < n) a[i] = 0; 392 return a; 393 } 394 395 var cloudRadians = Math.PI / 180, 396 cw = 1 << 11 >> 5, 397 ch = 1 << 11, 398 canvas, 399 ratio = 1; 400 401 if (typeof document !== "undefined") { 402 403 canvas = document.createElement("canvas"); 404 canvas.width = 1; 405 canvas.height = 1; 406 ratio = Math.sqrt(canvas.getContext("2d").getImageData(0, 0, 1, 1).data.length >> 2); 407 canvas.width = (cw << 5) / ratio; 408 canvas.height = ch / ratio; 409 } else { 410 // Attempt to use node-canvas. 411 canvas = new Canvas(cw << 5, ch); 412 } 413 414 var c = canvas.getContext("2d"), 415 spirals = { 416 archimedean: archimedeanSpiral, 417 rectangular: rectangularSpiral 418 }; 419 c.fillStyle = c.strokeStyle = "white"; 420 c.textAlign = "center"; 421 422 if (typeof module === "object" && module.exports) module.exports = cloud; 423 else (d3.layout || (d3.layout = {})).cloud = cloud; 424})();
Line numbers count LF bytes from the start of the resource, as the search results do. Vendor segments are library code the classifier recognised; they are stored but not indexed. Bytes are shown as Latin1 characters, one per byte.