1 | var RECYCLED_NODE = 1
|
2 | var LAZY_NODE = 2
|
3 | var TEXT_NODE = 3
|
4 | var EMPTY_OBJ = {}
|
5 | var EMPTY_ARR = []
|
6 | var map = EMPTY_ARR.map
|
7 | var isArray = Array.isArray
|
8 | var defer =
|
9 | typeof requestAnimationFrame !== "undefined"
|
10 | ? requestAnimationFrame
|
11 | : setTimeout
|
12 |
|
13 | var createClass = function(obj) {
|
14 | var out = ""
|
15 |
|
16 | if (typeof obj === "string") return obj
|
17 |
|
18 | if (isArray(obj) && obj.length > 0) {
|
19 | for (var k = 0, tmp; k < obj.length; k++) {
|
20 | if ((tmp = createClass(obj[k])) !== "") {
|
21 | out += (out && " ") + tmp
|
22 | }
|
23 | }
|
24 | } else {
|
25 | for (var k in obj) {
|
26 | if (obj[k]) {
|
27 | out += (out && " ") + k
|
28 | }
|
29 | }
|
30 | }
|
31 |
|
32 | return out
|
33 | }
|
34 |
|
35 | var merge = function(a, b) {
|
36 | var out = {}
|
37 |
|
38 | for (var k in a) out[k] = a[k]
|
39 | for (var k in b) out[k] = b[k]
|
40 |
|
41 | return out
|
42 | }
|
43 |
|
44 | var batch = function(list) {
|
45 | return list.reduce(function(out, item) {
|
46 | return out.concat(
|
47 | !item || item === true
|
48 | ? 0
|
49 | : typeof item[0] === "function"
|
50 | ? [item]
|
51 | : batch(item)
|
52 | )
|
53 | }, EMPTY_ARR)
|
54 | }
|
55 |
|
56 | var isSameAction = function(a, b) {
|
57 | return isArray(a) && isArray(b) && a[0] === b[0] && typeof a[0] === "function"
|
58 | }
|
59 |
|
60 | var shouldRestart = function(a, b) {
|
61 | if (a !== b) {
|
62 | for (var k in merge(a, b)) {
|
63 | if (a[k] !== b[k] && !isSameAction(a[k], b[k])) return true
|
64 | b[k] = a[k]
|
65 | }
|
66 | }
|
67 | }
|
68 |
|
69 | var patchSubs = function(oldSubs, newSubs, dispatch) {
|
70 | for (
|
71 | var i = 0, oldSub, newSub, subs = [];
|
72 | i < oldSubs.length || i < newSubs.length;
|
73 | i++
|
74 | ) {
|
75 | oldSub = oldSubs[i]
|
76 | newSub = newSubs[i]
|
77 | subs.push(
|
78 | newSub
|
79 | ? !oldSub ||
|
80 | newSub[0] !== oldSub[0] ||
|
81 | shouldRestart(newSub[1], oldSub[1])
|
82 | ? [
|
83 | newSub[0],
|
84 | newSub[1],
|
85 | newSub[0](dispatch, newSub[1]),
|
86 | oldSub && oldSub[2]()
|
87 | ]
|
88 | : oldSub
|
89 | : oldSub && oldSub[2]()
|
90 | )
|
91 | }
|
92 | return subs
|
93 | }
|
94 |
|
95 | var patchProperty = function(node, key, oldValue, newValue, listener, isSvg) {
|
96 | if (key === "key") {
|
97 | } else if (key === "style") {
|
98 | for (var k in merge(oldValue, newValue)) {
|
99 | oldValue = newValue == null || newValue[k] == null ? "" : newValue[k]
|
100 | if (k[0] === "-") {
|
101 | node[key].setProperty(k, oldValue)
|
102 | } else {
|
103 | node[key][k] = oldValue
|
104 | }
|
105 | }
|
106 | } else if (key[0] === "o" && key[1] === "n") {
|
107 | if (
|
108 | !((node.actions || (node.actions = {}))[
|
109 | (key = key.slice(2).toLowerCase())
|
110 | ] = newValue)
|
111 | ) {
|
112 | node.removeEventListener(key, listener)
|
113 | } else if (!oldValue) {
|
114 | node.addEventListener(key, listener)
|
115 | }
|
116 | } else if (!isSvg && key !== "list" && key in node) {
|
117 | node[key] = newValue == null ? "" : newValue
|
118 | } else if (
|
119 | newValue == null ||
|
120 | newValue === false ||
|
121 | (key === "class" && !(newValue = createClass(newValue)))
|
122 | ) {
|
123 | node.removeAttribute(key)
|
124 | } else {
|
125 | node.setAttribute(key, newValue)
|
126 | }
|
127 | }
|
128 |
|
129 | var createNode = function(vdom, listener, isSvg) {
|
130 | var ns = "http://www.w3.org/2000/svg"
|
131 | var props = vdom.props
|
132 | var node =
|
133 | vdom.type === TEXT_NODE
|
134 | ? document.createTextNode(vdom.name)
|
135 | : (isSvg = isSvg || vdom.name === "svg")
|
136 | ? document.createElementNS(ns, vdom.name, { is: props.is })
|
137 | : document.createElement(vdom.name, { is: props.is })
|
138 |
|
139 | for (var k in props) {
|
140 | patchProperty(node, k, null, props[k], listener, isSvg)
|
141 | }
|
142 |
|
143 | for (var i = 0, len = vdom.children.length; i < len; i++) {
|
144 | node.appendChild(
|
145 | createNode(
|
146 | (vdom.children[i] = getVNode(vdom.children[i])),
|
147 | listener,
|
148 | isSvg
|
149 | )
|
150 | )
|
151 | }
|
152 |
|
153 | return (vdom.node = node)
|
154 | }
|
155 |
|
156 | var getKey = function(vdom) {
|
157 | return vdom == null ? null : vdom.key
|
158 | }
|
159 |
|
160 | var patch = function(parent, node, oldVNode, newVNode, listener, isSvg) {
|
161 | if (oldVNode === newVNode) {
|
162 | } else if (
|
163 | oldVNode != null &&
|
164 | oldVNode.type === TEXT_NODE &&
|
165 | newVNode.type === TEXT_NODE
|
166 | ) {
|
167 | if (oldVNode.name !== newVNode.name) node.nodeValue = newVNode.name
|
168 | } else if (oldVNode == null || oldVNode.name !== newVNode.name) {
|
169 | node = parent.insertBefore(
|
170 | createNode((newVNode = getVNode(newVNode)), listener, isSvg),
|
171 | node
|
172 | )
|
173 | if (oldVNode != null) {
|
174 | parent.removeChild(oldVNode.node)
|
175 | }
|
176 | } else {
|
177 | var tmpVKid
|
178 | var oldVKid
|
179 |
|
180 | var oldKey
|
181 | var newKey
|
182 |
|
183 | var oldVProps = oldVNode.props
|
184 | var newVProps = newVNode.props
|
185 |
|
186 | var oldVKids = oldVNode.children
|
187 | var newVKids = newVNode.children
|
188 |
|
189 | var oldHead = 0
|
190 | var newHead = 0
|
191 | var oldTail = oldVKids.length - 1
|
192 | var newTail = newVKids.length - 1
|
193 |
|
194 | isSvg = isSvg || newVNode.name === "svg"
|
195 |
|
196 | for (var i in merge(oldVProps, newVProps)) {
|
197 | if (
|
198 | (i === "value" || i === "selected" || i === "checked"
|
199 | ? node[i]
|
200 | : oldVProps[i]) !== newVProps[i]
|
201 | ) {
|
202 | patchProperty(node, i, oldVProps[i], newVProps[i], listener, isSvg)
|
203 | }
|
204 | }
|
205 |
|
206 | while (newHead <= newTail && oldHead <= oldTail) {
|
207 | if (
|
208 | (oldKey = getKey(oldVKids[oldHead])) == null ||
|
209 | oldKey !== getKey(newVKids[newHead])
|
210 | ) {
|
211 | break
|
212 | }
|
213 |
|
214 | patch(
|
215 | node,
|
216 | oldVKids[oldHead].node,
|
217 | oldVKids[oldHead],
|
218 | (newVKids[newHead] = getVNode(
|
219 | newVKids[newHead++],
|
220 | oldVKids[oldHead++]
|
221 | )),
|
222 | listener,
|
223 | isSvg
|
224 | )
|
225 | }
|
226 |
|
227 | while (newHead <= newTail && oldHead <= oldTail) {
|
228 | if (
|
229 | (oldKey = getKey(oldVKids[oldTail])) == null ||
|
230 | oldKey !== getKey(newVKids[newTail])
|
231 | ) {
|
232 | break
|
233 | }
|
234 |
|
235 | patch(
|
236 | node,
|
237 | oldVKids[oldTail].node,
|
238 | oldVKids[oldTail],
|
239 | (newVKids[newTail] = getVNode(
|
240 | newVKids[newTail--],
|
241 | oldVKids[oldTail--]
|
242 | )),
|
243 | listener,
|
244 | isSvg
|
245 | )
|
246 | }
|
247 |
|
248 | if (oldHead > oldTail) {
|
249 | while (newHead <= newTail) {
|
250 | node.insertBefore(
|
251 | createNode(
|
252 | (newVKids[newHead] = getVNode(newVKids[newHead++])),
|
253 | listener,
|
254 | isSvg
|
255 | ),
|
256 | (oldVKid = oldVKids[oldHead]) && oldVKid.node
|
257 | )
|
258 | }
|
259 | } else if (newHead > newTail) {
|
260 | while (oldHead <= oldTail) {
|
261 | node.removeChild(oldVKids[oldHead++].node)
|
262 | }
|
263 | } else {
|
264 | for (var i = oldHead, keyed = {}, newKeyed = {}; i <= oldTail; i++) {
|
265 | if ((oldKey = oldVKids[i].key) != null) {
|
266 | keyed[oldKey] = oldVKids[i]
|
267 | }
|
268 | }
|
269 |
|
270 | while (newHead <= newTail) {
|
271 | oldKey = getKey((oldVKid = oldVKids[oldHead]))
|
272 | newKey = getKey(
|
273 | (newVKids[newHead] = getVNode(newVKids[newHead], oldVKid))
|
274 | )
|
275 |
|
276 | if (
|
277 | newKeyed[oldKey] ||
|
278 | (newKey != null && newKey === getKey(oldVKids[oldHead + 1]))
|
279 | ) {
|
280 | if (oldKey == null) {
|
281 | node.removeChild(oldVKid.node)
|
282 | }
|
283 | oldHead++
|
284 | continue
|
285 | }
|
286 |
|
287 | if (newKey == null || oldVNode.type === RECYCLED_NODE) {
|
288 | if (oldKey == null) {
|
289 | patch(
|
290 | node,
|
291 | oldVKid && oldVKid.node,
|
292 | oldVKid,
|
293 | newVKids[newHead],
|
294 | listener,
|
295 | isSvg
|
296 | )
|
297 | newHead++
|
298 | }
|
299 | oldHead++
|
300 | } else {
|
301 | if (oldKey === newKey) {
|
302 | patch(
|
303 | node,
|
304 | oldVKid.node,
|
305 | oldVKid,
|
306 | newVKids[newHead],
|
307 | listener,
|
308 | isSvg
|
309 | )
|
310 | newKeyed[newKey] = true
|
311 | oldHead++
|
312 | } else {
|
313 | if ((tmpVKid = keyed[newKey]) != null) {
|
314 | patch(
|
315 | node,
|
316 | node.insertBefore(tmpVKid.node, oldVKid && oldVKid.node),
|
317 | tmpVKid,
|
318 | newVKids[newHead],
|
319 | listener,
|
320 | isSvg
|
321 | )
|
322 | newKeyed[newKey] = true
|
323 | } else {
|
324 | patch(
|
325 | node,
|
326 | oldVKid && oldVKid.node,
|
327 | null,
|
328 | newVKids[newHead],
|
329 | listener,
|
330 | isSvg
|
331 | )
|
332 | }
|
333 | }
|
334 | newHead++
|
335 | }
|
336 | }
|
337 |
|
338 | while (oldHead <= oldTail) {
|
339 | if (getKey((oldVKid = oldVKids[oldHead++])) == null) {
|
340 | node.removeChild(oldVKid.node)
|
341 | }
|
342 | }
|
343 |
|
344 | for (var i in keyed) {
|
345 | if (newKeyed[i] == null) {
|
346 | node.removeChild(keyed[i].node)
|
347 | }
|
348 | }
|
349 | }
|
350 | }
|
351 |
|
352 | return (newVNode.node = node)
|
353 | }
|
354 |
|
355 | var propsChanged = function(a, b) {
|
356 | for (var k in a) if (a[k] !== b[k]) return true
|
357 | for (var k in b) if (a[k] !== b[k]) return true
|
358 | }
|
359 |
|
360 | var getTextVNode = function(node) {
|
361 | return typeof node === "object" ? node : createTextVNode(node)
|
362 | }
|
363 |
|
364 | var getVNode = function(newVNode, oldVNode) {
|
365 | return newVNode.type === LAZY_NODE
|
366 | ? ((!oldVNode ||
|
367 | (oldVNode.type !== LAZY_NODE ||
|
368 | propsChanged(oldVNode.lazy, newVNode.lazy))) &&
|
369 | ((oldVNode = getTextVNode(newVNode.lazy.view(newVNode.lazy))).lazy =
|
370 | newVNode.lazy),
|
371 | oldVNode)
|
372 | : newVNode
|
373 | }
|
374 |
|
375 | var createVNode = function(name, props, children, node, key, type) {
|
376 | return {
|
377 | name: name,
|
378 | props: props,
|
379 | children: children,
|
380 | node: node,
|
381 | type: type,
|
382 | key: key
|
383 | }
|
384 | }
|
385 |
|
386 | var createTextVNode = function(value, node) {
|
387 | return createVNode(value, EMPTY_OBJ, EMPTY_ARR, node, undefined, TEXT_NODE)
|
388 | }
|
389 |
|
390 | var recycleNode = function(node) {
|
391 | return node.nodeType === TEXT_NODE
|
392 | ? createTextVNode(node.nodeValue, node)
|
393 | : createVNode(
|
394 | node.nodeName.toLowerCase(),
|
395 | EMPTY_OBJ,
|
396 | map.call(node.childNodes, recycleNode),
|
397 | node,
|
398 | undefined,
|
399 | RECYCLED_NODE
|
400 | )
|
401 | }
|
402 |
|
403 | export var Lazy = function(props) {
|
404 | return {
|
405 | lazy: props,
|
406 | type: LAZY_NODE
|
407 | }
|
408 | }
|
409 |
|
410 | export var h = function(name, props) {
|
411 | for (var vdom, rest = [], children = [], i = arguments.length; i-- > 2; ) {
|
412 | rest.push(arguments[i])
|
413 | }
|
414 |
|
415 | while (rest.length > 0) {
|
416 | if (isArray((vdom = rest.pop()))) {
|
417 | for (var i = vdom.length; i-- > 0; ) {
|
418 | rest.push(vdom[i])
|
419 | }
|
420 | } else if (vdom === false || vdom === true || vdom == null) {
|
421 | } else {
|
422 | children.push(getTextVNode(vdom))
|
423 | }
|
424 | }
|
425 |
|
426 | props = props || EMPTY_OBJ
|
427 |
|
428 | return typeof name === "function"
|
429 | ? name(props, children)
|
430 | : createVNode(name, props, children, undefined, props.key)
|
431 | }
|
432 |
|
433 | export var app = function(props) {
|
434 | var state = {}
|
435 | var lock = false
|
436 | var view = props.view
|
437 | var node = props.node
|
438 | var vdom = node && recycleNode(node)
|
439 | var subscriptions = props.subscriptions
|
440 | var subs = []
|
441 |
|
442 | var listener = function(event) {
|
443 | dispatch(this.actions[event.type], event)
|
444 | }
|
445 |
|
446 | var setState = function(newState) {
|
447 | if (state !== newState) {
|
448 | state = newState
|
449 | if (subscriptions) {
|
450 | subs = patchSubs(subs, batch([subscriptions(state)]), dispatch)
|
451 | }
|
452 | if (view && !lock) defer(render, (lock = true))
|
453 | }
|
454 | return state
|
455 | }
|
456 |
|
457 | var dispatch = (props.middleware ||
|
458 | function(obj) {
|
459 | return obj
|
460 | })(function(action, props) {
|
461 | return typeof action === "function"
|
462 | ? dispatch(action(state, props))
|
463 | : isArray(action)
|
464 | ? typeof action[0] === "function" || isArray(action[0])
|
465 | ? dispatch(
|
466 | action[0],
|
467 | typeof action[1] === "function" ? action[1](props) : action[1]
|
468 | )
|
469 | : (batch(action.slice(1)).map(function(fx) {
|
470 | fx && fx[0](dispatch, fx[1])
|
471 | }, setState(action[0])),
|
472 | state)
|
473 | : setState(action)
|
474 | })
|
475 |
|
476 | var render = function() {
|
477 | lock = false
|
478 | node = patch(
|
479 | node.parentNode,
|
480 | node,
|
481 | vdom,
|
482 | (vdom = getTextVNode(view(state))),
|
483 | listener
|
484 | )
|
485 | }
|
486 |
|
487 | dispatch(props.init)
|
488 | }
|