All files solid.js

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94.97% Branches 151/159
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'use strict';
 
Object.defineProperty(exports, '__esModule', { value: true });
 
function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
 
var S = _interopDefault(require('s-js'));
 
const SNODE = Symbol('solid-node'),
  SPROXY = Symbol('solid-proxy');
 
const proxyTraps = {
  get(target, property) {
    if (property === '_state') return target;
    if (property === SPROXY || property === SNODE) return;
    const value = target[property],
      wrappable = isWrappable(value);
    if (S.isListening() && typeof value !== 'function') {
      let nodes, node;
      if (wrappable && (nodes = getDataNodes(value))) {
        node = nodes._self || (nodes._self = S.makeDataNode());
        node.current();
      }
      nodes = getDataNodes(target);
      node = nodes[property] || (nodes[property] = S.makeDataNode());
      node.current();
    }
    return wrappable ? wrap(value) : value;
  },
 
  set() { return true; },
 
  deleteProperty() { return true; }
};
 
function wrap(value) { return value[SPROXY] || (value[SPROXY] = new Proxy(value, proxyTraps)); }
 
function isWrappable(obj) { return obj !== null && typeof obj === 'object' && !(obj instanceof Element); }
 
function unwrap(item) {
  let result, unwrapped, v;
  if (result = (item != null) && item._state) return result;
  if (!isWrappable(item)) return item;
 
  if (Array.isArray(item)) {
    if (Object.isFrozen(item)) item = item.slice(0);
    for (let i = 0, l = item.length; i < l; i++) {
      v = item[i];
      if ((unwrapped = unwrap(v)) !== v) item[i] = unwrapped;
    }
  } else {
    if (Object.isFrozen(item)) item = Object.assign({}, item);
    let keys = Object.keys(item);
    for (let i = 0, l = keys.length; i < l; i++) {
      v = item[keys[i]];
      if ((unwrapped = unwrap(v)) !== v) item[keys[i]] = unwrapped;
    }
  }
  return item;
}
 
function getDataNodes(target) {
  let nodes = target[SNODE];
  if (!nodes) target[SNODE] = nodes = {};
  return nodes;
}
 
function setProperty(state, property, value) {
  value = unwrap(value);
  if (state[property] === value) return;
  const notify = Array.isArray(state) || !(property in state);
  if (value === void 0) {
    delete state[property];
  } else state[property] = value;
  let nodes = getDataNodes(state), node;
  (node = nodes[property]) && node.next();
  notify && (node = nodes._self) && node.next();
}
 
function mergeState(state, value) {
  const keys = Object.keys(value) || [];
  for (let i = 0; i < keys.length; i += 1) {
    const key = keys[i];
    setProperty(state, key, value[key]);
  }
}
 
function updatePath(current, path, traversed = []) {
  if (path.length === 1) {
    let value = path[0];
    if (typeof value === 'function') {
      value = value(wrap(current), traversed);
      // reconciled
      if (value === undefined) return;
    }
    return mergeState(current, value);
  }
 
  const part = path.shift(),
    partType = typeof part,
    isArray = Array.isArray(current);
 
  if (Array.isArray(part)) {
    // Ex. update('data', [2, 23], 'label', l => l + ' !!!');
    for (let i = 0; i < part.length; i++)
      updatePath(current, [part[i]].concat(path), traversed.concat([part[i]]));
  } else if (isArray && partType === 'function') {
    // Ex. update('data', i => i.id === 42, 'label', l => l + ' !!!');
    for (let i = 0; i < current.length; i++)
      if (part(current[i], i)) updatePath(current, [i].concat(path), traversed.concat([i]));
  } else if (isArray && partType === 'object') {
    // Ex. update('data', { from: 3, to: 12, by: 2 }, 'label', l => l + ' !!!');
    const {from = 0, to = current.length - 1, by = 1} = part;
    for (let i = from; i <= to; i += by)
      updatePath(current, [i].concat(path), traversed.concat([i]));
  } else if (isArray && part === '*') {
    // Ex. update('data', '*', 'label', l => l + ' !!!');
    for (let i = 0; i < current.length; i++)
      updatePath(current, [i].concat(path), traversed.concat([i]));
  } else if (path.length === 1) {
    let value = path[0];
    if (typeof value === 'function') {
      const currentPart = current[part];
      value = value(isWrappable(currentPart) ? wrap(currentPart) : currentPart, traversed.concat([part]));
    }
    if (isWrappable(current[part]) && isWrappable(value) && !Array.isArray(value))
      return mergeState(current[part], value);
    return setProperty(current, part, value);
  } else updatePath(current[part], path, traversed.concat([part]));
}
 
function createState(state = {}) {
  state = unwrap(state);
  const wrappedState = wrap(state);
  return [wrappedState, setState];
 
  function setState() {
    const args = arguments;
    S.freeze(() => {
      if (Array.isArray(args[0])) {
        for (let i = 0; i < args.length; i += 1)
          updatePath(state, args[i]);
      } else updatePath(state, Array.prototype.slice.call(args));
    });
  }
}
 
function applyState(target, parent, property, merge, key) {
  let previous = parent[property];
  if (target === previous) return;
  if (!isWrappable(target) || (previous == null))
    return (target !== previous) && setProperty(parent, property, target);
 
  if (Array.isArray(target)) {
    if (target.length && previous.length && (!merge || (key && target[0][key] != null))) {
      let i, j, start, end, newEnd, item, newIndicesNext, keyVal,
        temp = new Array(target.length),
        newIndices = new Map();
      // skip common prefix and suffix
      for (start = 0, end = Math.min(previous.length, target.length); start < end && (previous[start] === target[start] || key && previous[start][key] === target[start][key]); start++)
        applyState(target[start], previous, start, merge, key);
      for (end = previous.length - 1, newEnd = target.length - 1; end >= 0 && newEnd >= 0 && (previous[end] === target[newEnd] || key && previous[end][key] === target[newEnd][key]); end--, newEnd--)
        temp[newEnd] = previous[end];
      // prepare a map of all indices in target
      newIndicesNext = new Array(newEnd + 1);
      for (j = newEnd; j >= start; j--) {
        item = target[j];
        keyVal = key ? item[key] : item;
        i = newIndices.get(keyVal);
        newIndicesNext[j] = i === undefined ? -1 : i;
        newIndices.set(keyVal, j);
      }
      // step through all old items to check reuse
      for (i = start; i <= end; i++) {
        item = previous[i];
        keyVal = key ? item[key] : item;
        j = newIndices.get(keyVal);
        if (j !== undefined && j !== -1) {
          temp[j] = previous[i];
          j = newIndicesNext[j];
          newIndices.set(keyVal, j);
        }
      }
      // set all the new values
      for (j = start; j < target.length; j++) {
        if (temp.hasOwnProperty(j)) {
          setProperty(previous, j, temp[j]);
          applyState(target[j], previous, j, merge, key);
        }
        else setProperty(previous, j, target[j]);
      }
    } else {
      for (let i = 0, len = target.length; i < len; i++) {
        applyState(target[i], previous, i, merge, key);
      }
    }
    if (previous.length > target.length) setProperty(previous, 'length', target.length);
    return;
  }
 
  const targetKeys = Object.keys(target);
  for (let i = 0, len = targetKeys.length; i < len; i++) {
    applyState(target[targetKeys[i]], previous, targetKeys[i], merge, key);
  }
  const previousKeys = Object.keys(previous);
  for (let i = 0, len = previousKeys.length; i < len; i++) {
    if (target[previousKeys[i]] === undefined) setProperty(previous, previousKeys[i], undefined);
  }
}
 
// Diff method for setState
function reconcile(path, options = {}) {
  let value;
  if (Array.isArray(path)) {
    value = path.pop();
  } else if (typeof path === 'object') {
    value = path;
    path = undefined;
  } else {
    path = Array.prototype.slice.call(arguments, 0, -1),
    value = arguments[arguments.length - 1];
    options = {};
  }
  const { merge, key = 'id' } = options;
  return state => {
    state = unwrap(state);
    if (path) {
      for (let i = 0; i < path.length - 1; i += 1) state = state[path[i]];
      applyState(value, state, path[path.length - 1], merge, key);
    } else applyState(value, { state }, 'state', merge, key);
  }
}
 
function createSignal(value, comparator) {
  const d = S.makeDataNode(value);
  let setter;
  if (comparator) {
    let age = -1;
    setter = v => {
      if (!comparator(value, v)) {
        const time = d.clock().time();
        if (time === age)
          throw new Error(`Conflicting value update: ${v} is not the same as ${value}`);
        age = time;
        value = v;
        d.next(v);
      }
    };
  } else setter = d.next.bind(d);
  return [d.current.bind(d), setter];
}
 
function createMemo(fn, seed) { return S(fn, seed); }
 
function createEffect(fn, deps, defer) {
  if (!deps) return S.makeComputationNode(fn);
  S.on(deps, fn, undefined, defer);
}
 
const { root: createRoot, cleanup: onCleanup, sample, freeze } = S;
 
exports.createRoot = createRoot;
exports.onCleanup = onCleanup;
exports.sample = sample;
exports.freeze = freeze;
exports.createState = createState;
exports.unwrap = unwrap;
exports.reconcile = reconcile;
exports.createSignal = createSignal;
exports.createMemo = createMemo;
exports.createEffect = createEffect;