core-js/Graphics/Render.js · elk · git.iko.soy

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elk/core-js/Graphics/Render.js

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2var Render = function(){

4function newElement(elementType) {

5 var e = document.createElement(elementType);

6 e.style.padding = "0";

7 e.style.margin = "0";

8 return e;

9};

11function addTo(container, elem) {

12 container.appendChild(elem);

13};

15function makeText(pos,txt) {

16 var e = newElement('div');

17 e.innerHTML = txt;

18 e.style.textAlign = pos;

19 return e;

20};

22function image(src) {

23 var img = newElement('img');

24 img.src = src;

25 img.name = src;

26 img.style.display = "block";

27 return img;

30function fittedImage(w,h,src) {

31 var e = newElement('div');

32 e.style.width = w + 'px';

33 e.style.height = h + 'px';

34 e.style.position = "relative";

35 e.style.overflow = "hidden";

37 var img = newElement('img');

38 img.onload = function() {

39 img.style.position = 'absolute';

40 img.style.margin = 'auto';

42 var sw = w, sh = h;

43 if (w / h > this.width / this.height) {

44 sh = Math.round(this.height * w / this.width);

45 } else {

46 sw = Math.round(this.width * h / this.height);

47 }

48 img.style.width = sw + 'px';

49 img.style.height = sh + 'px';

50 img.style.left = ((w - sw) / 2) + 'px';

51 img.style.top = ((h - sh) / 2) + 'px';

52 };

53 img.src = src;

54 img.name = src;

55 addTo(e,img);

56 return e;

57};

59var video = function(src) {

60 var e = newElement('video');

61 e.controls = "controls";

62 var source = newElement('source');

63 source.src = src;

64 var segs = src.split('.');

65 source.type = "video/" + segs[segs.length-1];

66 addTo(e, source);

67 e.style.display = "block";

68 return e;

69};

71function divify(e) {

72 var div = newElement('div');

73 addTo(div, e);

74 return div;

75};

76function goDown(e) {

77 return e //.tagName === "DIV" ? e : divify(e);

78};

79function goRight(e) {

80 e.style.styleFloat = "left";

81 e.style.cssFloat = "left";

82 return e;

83};

84function goIn(e) {

85 e.style.position = 'absolute';

86 return e;

87};

88function flowWith(f, prep, elist) {

89 var container = newElement('div');

90 for (var i = elist.length; i--; ) {

91 addTo(container, f(prep(elist[i])));

92 }

93 return container;

94};

96function flow(dir,elist) {

97 switch(dir) {

98 case "DDown": elist = elist.slice(0).reverse();

99 case "DUp": return flowWith(goDown,render,elist);

100 case "DRight": elist = elist.slice(0).reverse();

101 case "DLeft": return flowWith(goRight,render,elist);

102 case "DOut": elist = elist.slice(0).reverse();

103 case "DIn": return flowWith(goIn,render,elist);

104 };

107function toPos(pos) {

108 switch(pos[0]) {

109 case "Absolute": return pos[1] + "px";

110 case "Relative": return (pos[1] * 100) + "%";

111 }

114function setPos(pos,e) {

115 e.style.position = 'absolute';

116 e.style.margin = 'auto';

117 switch(pos[0]) {

118 case "Position":

119 if (pos[1][0] !== "Far") e.style.left = 0;

120 if (pos[1][0] !== "Near") e.style.right = 0;

121 if (pos[2][0] !== "Far") e.style.top = 0;

122 if (pos[2][0] !== "Near") e.style.bottom = 0;

123 break;

124 case "PositionAt":

125 e.style.top = toPos(pos[2]);

126 e.style.left = toPos(pos[1]);

127 var shift = "translate(" + ~~(-e.style.width.slice(0,-2) / 2) + "px," + ~~(-e.style.height.slice(0,-2) / 2) + "px)";

128 e.style.transform = shift;

129 e.style.msTransform = shift;

130 e.style.MozTransform = shift;

131 e.style.webkitTransform = shift;

132 e.style.OTransform = shift;

133 break;

134 default:

135 var p = pos[0].slice(-2);

136 e.style[p[0] === "T" ? 'top' : 'bottom'] = toPos(pos[2]);

137 e.style[p[1] === "L" ? 'left' : 'right'] = toPos(pos[1]);

138 }

141function container(pos,elem) {

142 var e = render(elem);

143 setPos(pos,e);

144 var div = newElement('div');

145 div.style.position = "relative";

146 div.style.overflow = "hidden";

147 addTo(div,e);

148 return div;

151function render(elem) {

152 var e = {};

153 switch(elem[2][0]) {

154 case "EText": e = makeText(elem[2][1],elem[2][2]); break;

155 case "EImage": e = image(elem[2][1]); break;

156 case "EVideo": e = video(elem[2][1]); break;

157 case "EFittedImage": e = fittedImage(elem[3],elem[4],elem[2][1]); break;

158 case "EFlow": e = flow(elem[2][1][0],elem[2][2]); break;

159 case "ECollage": e = Collage.collage(elem[2][1],elem[2][2],elem[2][3]); break;

160 case "EEmpty": e = newElement('div'); break;

161 case "EContainer": e = container(elem[2][1],elem[2][2]); break;

162 case "EHtml":

163 e = elem[2][1];

164 if (e.type !== 'button') {

165 var p = Value.getExcess(e);

166 elem[3] -= p[0];

167 elem[4] -= p[1];

169 break;

170 case "EExternalHtml":

171 e = newElement('div');

172 addTo(e, elem[2][1]);

173 break;

174 }

175 e.id = elem[1];

176 e.style.width = (~~elem[3]) + 'px';

177 e.style.height = (~~elem[4]) + 'px';

178 if (elem[5] !== 1) { e.style.opacity = elem[5]; }

179 if (elem[6][0] === "Just") {

180 e.style.backgroundColor = Elm.Color.extract(elem[6][1]);

181 }

182 if (elem[7][0] === "Just") {

183 var a = newElement('a');

184 a.href = elem[7][1];

185 addTo(a,e);

186 return a;

187 }

188 return e;

191function update(node,curr,next) {

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

193 if (curr[1] === next[1]) return;

194 if (curr[2][0] !== next[2][0]) {

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

196 }

197 var nextE = next[2], currE = curr[2];

198 switch(nextE[0]) {

199 case "EText":

200 if (nextE[1] !== currE[1]) node.style.textAlign = nextE[1];

201 if (nextE[2] !== currE[2]) node.innerHTML = nextE[2];

202 break;

203 case "EImage":

204 if (nextE[1] !== currE[1]) node.src = nextE[1];

205 break;

206 case "EVideo":

207 case "EFittedImage":

208 if (!Value.eq(nextE,currE) || next[3]!==curr[3] || next[4]!==curr[4]) {

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

211 break;

212 case "ECollage":

213 if (nextE[1] !== currE[1] || nextE[2] !== currE[2] || nextE[3].length !== currE[3].length) {

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

216 Collage.updateCollage(node,currE[3],nextE[3]);

217 break;

218 case "EFlow":

219 if (nextE[1] !== currE[1]) {

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

222 var nexts = nextE[2];

223 var kids = node.childNodes;

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

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

227 var currs = currE[2];

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

229 switch(nextE[1][0]) {

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

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

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

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

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

236 goDir(kids[i]);

238 break;

239 case "EContainer":

240 update(node.childNodes[0],currE[2],nextE[2]);

241 setPos(nextE[1],node.childNodes[0]);

242 break;

243 case "EEmpty":

244 break;

245 case "EHtml":

246 if (next[1] !== curr[1]) {

247 var e = render(next);

248 node.parentNode.replaceChild(e,node);

249 node = e;

251 if (e.type !== 'button') {

252 var p = Value.getExcess(node);

253 next[3] -= p[0];

254 next[4] -= p[1];

256 break;

257 case "EExternalHtml":

258 if (next[1] !== curr[1])

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

260 break;

261 }

262 if (next[3] !== curr[3]) node.style.width = (~~next[3]) + 'px';

263 if (next[4] !== curr[4]) node.style.height = (~~next[4]) + 'px';

264 if (next[5] !== curr[5]) node.style.opacity = next[5];

265 if (next[6].length === 2) {

266 var clr = Elm.Color.extract(next[6][1]);

267 if (clr !== node.style.backgroundColor) node.style.backgroundColor = clr;

268 }

269 if (next[7].length === 2) {

270 if (curr[7].length === 1 || next[7][1] !== curr[7][1]) node.parentNode.href = next[7][1];

271 }

272 next[1] = curr[1];

275return {render:render,update:update,addTo:addTo,newElement:newElement,flowWith:flowWith,goIn:goIn};

277}();