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(props, e) {

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

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

13 if (props.opacity !== 1) { e.style.opacity = props.opacity; }

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

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

16 }

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

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

19 var a = newElement('a');

20 a.href = props.href;

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

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

23 a.style.top = 0;

24 a.style.left = 0;

25 a.style.display = 'block';

26 a.style.position = 'absolute';

27 e.style.position = 'relative';

28 e.appendChild(a);

29 }

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

31 var overCount = 0;

32 e.addEventListener('mouseover', function() {

33 if (overCount++ > 0) return;

34 props.hover(true);

35 });

36 e.addEventListener('mouseout', function(evt) {

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

38 overCount = 0;

39 props.hover(false);

40 });

41 }

42 return e;

45function image(props, img) {

46 switch (img._0.ctor) {

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

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

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

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

51 }

54function plainImage(src) {

55 var img = newElement('img');

56 img.src = src;

57 img.name = src;

58 img.style.display = "block";

59 return img;

62function tiledImage(src) {

63 var div = newElement('div');

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

65 return div;

68function fittedImage(w, h, src) {

69 var div = newElement('div');

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

71 div.style.webkitBackgroundSize = 'cover';

72 div.style.MozBackgroundSize = 'cover';

73 div.style.OBackgroundSize = 'cover';

74 div.style.backgroundSize = 'cover';

75 return div;

78function croppedImage(elem, w, h, src) {

79 var pos = elem._0._0;

80 var e = newElement('div');

81 e.style.overflow = "hidden";

83 var img = newElement('img');

84 img.onload = function() {

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

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

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

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

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

90 };

91 img.src = src;

92 img.name = src;

93 e.appendChild(img);

94 return e;

97function goIn(e) { e.style.position = 'absolute'; return e; }

98function goDown(e) { return e }

99function goRight(e) { e.style.styleFloat = e.style.cssFloat = "left"; return e; }

100function flowWith(f, array) {

101 var container = newElement('div');

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

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

104 }

105 return container;

108function flow(dir,elist) {

109 var array = fromList(elist);

110 switch(dir.ctor) {

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

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

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

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

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

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

117 }

120function toPos(pos) {

121 switch(pos.ctor) {

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

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

124 }

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

128// before calling this function

129function setPos(pos,w,h,e) {

130 e.style.position = 'absolute';

131 e.style.margin = 'auto';

132 var transform = '';

133 switch(pos.horizontal.ctor) {

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

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

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

137 }

138 switch(pos.vertical.ctor) {

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

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

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

142 }

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

144 return e;

147function container(pos,elem) {

148 var e = render(elem);

149 setPos(pos, elem.props.width, elem.props.height, e);

150 var div = newElement('div');

151 div.style.position = 'relative';

152 div.style.overflow = 'hidden';

153 div.appendChild(e);

154 return div;

157function rawHtml(elem) {

158 var html = elem.html;

159 var args = elem.args;

160 var guid = elem.guid;

162 var div = newElement('div');

163 div.innerHTML = html;

164 div.style.visibility = "hidden";

165 document.body.appendChild(div);

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

168 var arg = args[i];

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

170 if (arg.isText) {

171 span.innerHTML = arg;

172 } else {

173 span.style.display = 'block';

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

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

176 span.appendChild(render(arg));

177 }

178 }

179 document.body.removeChild(div);

180 div.style.visibility = 'visible';

181 return div;

184function render(elem) { return setProps(elem.props, makeElement(elem)); }

185function makeElement(e) {

186 var elem = e.element;

187 switch(elem.ctor) {

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

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

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

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

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

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

194 }

197function update(node, curr, next) {

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

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

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

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

202 return true;

203 }

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

205 switch(nextE.ctor) {

206 case "Spacer": break;

207 case "RawHtml":

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

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

210 return true;

211 }

212 var nargs = nextE.args;

213 var cargs = currE.args;

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

215 var narg = nargs[i];

216 var carg = cargs[i]

217 if (narg == carg) continue;

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

219 if (narg.isElement) {

220 if (carg.isElement) {

221 update(span, carg, narg);

222 } else {

223 span.style.display = 'block';

224 var e = render(narg);

225 span.innerHTML = '';

226 span.appendChild(e);

227 }

228 } else {

229 span.style.display = 'inline';

230 span.innerHTML = narg;

231 }

232 }

233 break;

234 case "Image":

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

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

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

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

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

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

241 return true;

242 }

243 break;

244 case "Flow":

245 var arr = fromList(nextE._1);

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

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

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

249 return true;

250 }

251 var nexts = fromList(nextE._1);

252 var kids = node.childNodes;

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

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

255 return true;

256 }

257 var currs = fromList(currE._1);

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

259 switch(nextE._0.ctor) {

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

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

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

263 }

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

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

266 goDir(kids[i]);

267 }

268 break;

269 case "Container":

270 update(node.firstChild, currE._1, nextE._1)

271 setPos(nextE._0, nextE._1.props.width, nextE._1.props.height, node.firstChild);

272 break;

273 case "Custom":

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

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

276 if (done) return;

277 } else {

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

279 }

280 }

281 updateProps(node, curr, next);

284function updateProps(node, curr, next) {

285 var props = next.props, currP = curr.props, e = node;

286 if (props.width !== currP.width) e.style.width = (props.width |0) + 'px';

287 if (props.height !== currP.height) e.style.height = (props.height|0) + 'px';

288 if (props.opacity !== 1 && props.opacity !== currP.opacity) {

289 e.style.opacity = props.opacity;

290 }

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

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

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

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

295 }

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

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

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

299 var a = newElement('a');

300 a.href = props.href;

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

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

303 a.style.top = 0;

304 a.style.left = 0;

305 a.style.display = 'block';

306 a.style.position = 'absolute';

307 e.style.position = 'relative';

308 e.appendChild(a);

309 } else {

310 node.lastNode.href = props.href;

311 }

312 }

315return { render:render, update:update };