runtime/Render/Element.js · elk · git.iko.soy

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elk/runtime/Render/Element.js

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2ElmRuntime.Render.Element = function() {

3'use strict';

5var Utils = ElmRuntime.use(ElmRuntime.Render.Utils);

6var newElement = Utils.newElement, extract = Utils.extract,

7 addTransform = Utils.addTransform, removeTransform = Utils.removeTransform,

8 fromList = Utils.fromList, eq = Utils.eq;

10function setProps(elem, e) {

11 var props = elem.props;

12 var element = elem.element;

13 var width = props.width - (element.adjustWidth || 0);

14 var height = props.height - (element.adjustHeight || 0);

15 e.style.width = (width |0) + 'px';

16 e.style.height = (height|0) + 'px';

17 if (props.opacity !== 1) {

18 e.style.opacity = props.opacity;

19 }

20 if (props.color.ctor === 'Just') {

21 e.style.backgroundColor = extract(props.color._0);

22 }

23 if (props.tag !== '') { e.id = props.tag; }

24 if (props.href !== '') {

25 var a = newElement('a');

26 a.href = props.href;

27 a.style.width = '100%';

28 a.style.height = '100%';

29 a.style.top = 0;

30 a.style.left = 0;

31 a.style.display = 'block';

32 a.style.position = 'absolute';

33 e.style.position = 'relative';

34 e.appendChild(a);

35 }

36 if (props.hover.ctor !== '_Tuple0') {

37 addHover(e, props.hover);

38 }

39 if (props.click.ctor !== '_Tuple0') {

40 addClick(e, props.click);

41 }

42 return e;

45function addClick(e, handler) {

46 e.style.pointerEvents = 'auto';

47 e.elm_click_handler = handler;

48 function trigger(ev) {

49 e.elm_click_handler(Utils.Tuple0);

50 ev.stopPropagation();

51 }

52 e.elm_click_trigger = trigger;

53 e.addEventListener('click', trigger);

56function removeClick(e, handler) {

57 if (e.elm_click_trigger) {

58 e.removeEventListener('click', e.elm_click_trigger);

59 }

62function addHover(e, handler) {

63 e.style.pointerEvents = 'auto';

64 e.elm_hover_handler = handler;

65 e.elm_hover_count = 0;

67 function over(evt) {

68 if (e.elm_hover_count++ > 0) return;

69 e.elm_hover_handler(true);

70 evt.stopPropagation();

71 }

72 function out(evt) {

73 if (e.contains(evt.toElement || evt.relatedTarget)) return;

74 e.elm_hover_count = 0;

75 e.elm_hover_handler(false);

76 evt.stopPropagation();

77 }

78 e.elm_hover_over = over;

79 e.elm_hover_out = out;

80 e.addEventListener('mouseover', over);

81 e.addEventListener('mouseout', out);

84function removeHover(e) {

85 if (e.elm_hover_over) {

86 e.removeEventListener('mouseover', e.elm_hover_over);

87 }

88 if (e.elm_hover_out) {

89 e.removeEventListener('mouseout', e.elm_hover_out);

90 }

93function image(props, img) {

94 switch (img._0.ctor) {

95 case 'Plain': return plainImage(img._3);

96 case 'Fitted': return fittedImage(props.width, props.height, img._3);

97 case 'Cropped': return croppedImage(img,props.width,props.height,img._3);

98 case 'Tiled': return tiledImage(img._3);

99 }

102function plainImage(src) {

103 var img = newElement('img');

104 img.src = src;

105 img.name = src;

106 img.style.display = "block";

107 return img;

110function tiledImage(src) {

111 var div = newElement('div');

112 div.style.backgroundImage = 'url(' + src + ')';

113 return div;

116function fittedImage(w, h, src) {

117 var div = newElement('div');

118 div.style.background = 'url(' + src + ') no-repeat center';

119 div.style.webkitBackgroundSize = 'cover';

120 div.style.MozBackgroundSize = 'cover';

121 div.style.OBackgroundSize = 'cover';

122 div.style.backgroundSize = 'cover';

123 return div;

126function croppedImage(elem, w, h, src) {

127 var pos = elem._0._0;

128 var e = newElement('div');

129 e.style.overflow = "hidden";

131 var img = newElement('img');

132 img.onload = function() {

133 var sw = w / elem._1, sh = h / elem._2;

134 img.style.width = ((this.width * sw)|0) + 'px';

135 img.style.height = ((this.height * sh)|0) + 'px';

136 img.style.marginLeft = ((- pos._0 * sw)|0) + 'px';

137 img.style.marginTop = ((- pos._1 * sh)|0) + 'px';

138 };

139 img.src = src;

140 img.name = src;

141 e.appendChild(img);

142 return e;

145function goIn(e) { e.style.position = 'absolute'; return e; }

146function goDown(e) { return e }

147function goRight(e) { e.style.styleFloat = e.style.cssFloat = "left"; return e; }

148function flowWith(f, array) {

149 var container = newElement('div');

150 if (f == goIn) container.style.pointerEvents = 'none';

152 for (var i = array.length; i--; ) {

153 container.appendChild(f(render(array[i])));

154 }

155 return container;

158function flow(dir,elist) {

159 var array = fromList(elist);

160 switch(dir.ctor) {

161 case "DDown": array.reverse();

162 case "DUp": return flowWith(goDown,array);

163 case "DRight": array.reverse();

164 case "DLeft": return flowWith(goRight,array);

165 case "DOut": array.reverse();

166 case "DIn": return flowWith(goIn,array);

167 }

170function toPos(pos) {

171 switch(pos.ctor) {

172 case "Absolute": return pos._0 + "px";

173 case "Relative": return (pos._0 * 100) + "%";

174 }

177// must clear right, left, top, bottom, and transform

178// before calling this function

179function setPos(pos,elem,e) {

180 var element = elem.element;

181 var props = elem.props;

182 var w = props.width + (element.adjustWidth ? element.adjustWidth : 0);

183 var h = props.height + (element.adjustHeight ? element.adjustHeight : 0);

185 e.style.position = 'absolute';

186 e.style.margin = 'auto';

187 var transform = '';

188 switch(pos.horizontal.ctor) {

189 case 'P': e.style.right = toPos(pos.x); e.style.removeProperty('left'); break;

190 case 'Z': transform = 'translateX(' + ((-w/2)|0) + 'px) ';

191 case 'N': e.style.left = toPos(pos.x); e.style.removeProperty('right'); break;

192 }

193 switch(pos.vertical.ctor) {

194 case 'N': e.style.bottom = toPos(pos.y); e.style.removeProperty('top'); break;

195 case 'Z': transform += 'translateY(' + ((-h/2)|0) + 'px)';

196 case 'P': e.style.top = toPos(pos.y); e.style.removeProperty('bottom'); break;

197 }

198 if (transform !== '') addTransform(e.style, transform);

199 return e;

202function container(pos,elem) {

203 var e = render(elem);

204 setPos(pos, elem, e);

205 var div = newElement('div');

206 div.style.position = 'relative';

207 div.style.overflow = 'hidden';

208 div.appendChild(e);

209 return div;

212function rawHtml(elem) {

213 var html = elem.html;

214 var args = elem.args;

215 var guid = elem.guid;

216 var align = elem.align;

218 var div = newElement('div');

219 div.innerHTML = html;

220 div.style.visibility = "hidden";

221 if (align) div.style.textAlign = align;

222 document.body.appendChild(div);

224 for (var i = args.length; i--; ) {

225 var arg = args[i];

226 var span = document.getElementById('md-' + guid + '-' + i);

227 if (arg.isText) {

228 span.innerHTML = arg;

229 } else {

230 span.style.display = 'block';

231 span.style.width = arg.props.width + 'px';

232 span.style.height = arg.props.height + 'px';

233 span.appendChild(render(arg));

234 }

235 }

236 document.body.removeChild(div);

237 div.style.visibility = 'visible';

238 return div;

241function render(elem) { return setProps(elem, makeElement(elem)); }

242function makeElement(e) {

243 var elem = e.element;

244 switch(elem.ctor) {

245 case 'Image': return image(e.props, elem);

246 case 'Flow': return flow(elem._0, elem._1);

247 case 'Container': return container(elem._0, elem._1);

248 case 'Spacer': return newElement('div');

249 case 'RawHtml': return rawHtml(elem);

250 case 'Custom': return elem.render(elem.model);

251 }

254function update(node, curr, next) {

255 if (node.tagName === 'A') { node = node.firstChild; }

256 if (curr.props.id === next.props.id) return updateProps(node, curr, next);

257 if (curr.element.ctor !== next.element.ctor) {

258 node.parentNode.replaceChild(render(next),node);

259 return true;

260 }

261 var nextE = next.element, currE = curr.element;

262 switch(nextE.ctor) {

263 case "Spacer": break;

264 case "RawHtml":

265 // only markdown blocks have guids, so this must be a text block

266 if (nextE.guid === null) {

267 if(currE.html.valueOf() !== nextE.html.valueOf()) {

268 node.innerHTML = nextE.html;

269 }

270 break;

271 }

272 if (nextE.guid !== currE.guid) {

273 node.parentNode.replaceChild(render(next),node);

274 return true;

275 }

276 var nargs = nextE.args;

277 var cargs = currE.args;

278 for (var i = nargs.length; i--; ) {

279 var narg = nargs[i];

280 var carg = cargs[i]

281 if (narg == carg) continue;

282 var span = document.getElementById('md-' + currE.guid + '-' + i);

283 if (narg.isElement) {

284 if (carg.isElement) {

285 update(span, carg, narg);

286 } else {

287 span.style.display = 'block';

288 var e = render(narg);

289 span.innerHTML = '';

290 span.appendChild(e);

291 }

292 } else {

293 span.style.display = 'inline';

294 span.innerHTML = narg;

295 }

296 }

297 break;

298 case "Image":

299 if (nextE._0.ctor === 'Plain') {

300 if (nextE._3 !== currE._3) node.src = nextE._3;

301 } else if (!eq(nextE,currE) ||

302 next.props.width !== curr.props.width ||

303 next.props.height !== curr.props.height) {

304 node.parentNode.replaceChild(render(next),node);

305 return true;

306 }

307 break;

308 case "Flow":

309 var arr = fromList(nextE._1);

310 for (var i = arr.length; i--; ) { arr[i] = arr[i].element.ctor; }

311 if (nextE._0.ctor !== currE._0.ctor) {

312 node.parentNode.replaceChild(render(next),node);

313 return true;

314 }

315 var nexts = fromList(nextE._1);

316 var kids = node.childNodes;

317 if (nexts.length !== kids.length) {

318 node.parentNode.replaceChild(render(next),node);

319 return true;

320 }

321 var currs = fromList(currE._1);

322 var goDir = function(x) { return x; };

323 switch(nextE._0.ctor) {

324 case "DDown": case "DUp": goDir = goDown; break;

325 case "DRight": case "DLeft": goDir = goRight; break;

326 case "DOut": case "DIn": goDir = goIn; break;

327 }

328 for (var i = kids.length; i-- ;) {

329 update(kids[i],currs[i],nexts[i]);

330 goDir(kids[i]);

331 }

332 break;

333 case "Container":

334 update(node.firstChild, currE._1, nextE._1);

335 setPos(nextE._0, nextE._1, node.firstChild);

336 break;

337 case "Custom":

338 if (currE.type === nextE.type) {

339 var done = nextE.update(node, currE.model, nextE.model);

340 if (done) return;

341 } else {

342 return node.parentNode.replaceChild(render(next), node);

343 }

344 }

345 updateProps(node, curr, next);

348function updateProps(node, curr, next) {

349 var props = next.props;

350 var currP = curr.props;

351 var e = node;

352 var element = next.element;

353 var width = props.width - (element.adjustWidth || 0);

354 var height = props.height - (element.adjustHeight || 0);

355 if (width !== currP.width) {

356 e.style.width = (width|0) + 'px';

357 }

358 if (height !== currP.height) {

359 e.style.height = (height|0) + 'px';

360 }

361 if (props.opacity !== currP.opacity) {

362 e.style.opacity = props.opacity;

363 }

364 var nextColor = (props.color.ctor === 'Just' ?

365 extract(props.color._0) : '');

366 if (e.style.backgroundColor !== nextColor) {

367 e.style.backgroundColor = (nextColor === '' ? 'transparent' : nextColor);

368 }

369 if (props.tag !== currP.tag) { e.id = props.tag; }

370 if (props.href !== currP.href) {

371 if (currP.href === '') {

372 var a = newElement('a');

373 a.href = props.href;

374 a.style.width = '100%';

375 a.style.height = '100%';

376 a.style.top = 0;

377 a.style.left = 0;

378 a.style.display = 'block';

379 a.style.position = 'absolute';

380 e.style.position = 'relative';

381 e.appendChild(a);

382 } else {

383 node.lastNode.href = props.href;

384 }

385 }

387 // update hover handlers

388 if (props.hover.ctor === '_Tuple0') {

389 removeHover(e);

390 } else if (e.elm_hover_handler) {

391 e.elm_hover_handler = props.hover;

392 } else {

393 addHover(e, props.hover);

394 }

396 // update click handlers

397 if (props.click.ctor === '_Tuple0') {

398 removeClick(e);

399 } else if (e.elm_click_handler) {

400 e.elm_click_handler = props.click;

401 } else {

402 addClick(e, props.click);

403 }

406return { render:render, update:update };