mirror of https://github.com/sveltejs/svelte
Jacob Wright
7 years ago
parent
d2f8e472a5
commit
9a1d87494d
@ -0,0 +1,5 @@
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export default {
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options: {
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immutable: true
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}
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};
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@ -0,0 +1,218 @@
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function noop() {}
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function assign(target) {
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var k,
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source,
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i = 1,
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len = arguments.length;
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for (; i < len; i++) {
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source = arguments[i];
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for (k in source) target[k] = source[k];
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}
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return target;
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}
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function blankObject() {
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return Object.create(null);
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}
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function destroy(detach) {
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this.destroy = noop;
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this.fire('destroy');
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this.set = this.get = noop;
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if (detach !== false) this._fragment.u();
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this._fragment.d();
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this._fragment = this._state = null;
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}
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function differsImmutable(a, b) {
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return a != a ? b == b : a !== b;
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}
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function dispatchObservers(component, group, changed, newState, oldState) {
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for (var key in group) {
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if (!changed[key]) continue;
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var newValue = newState[key];
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var oldValue = oldState[key];
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var callbacks = group[key];
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if (!callbacks) continue;
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for (var i = 0; i < callbacks.length; i += 1) {
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var callback = callbacks[i];
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if (callback.__calling) continue;
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callback.__calling = true;
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callback.call(component, newValue, oldValue);
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callback.__calling = false;
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}
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}
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}
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function fire(eventName, data) {
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var handlers =
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eventName in this._handlers && this._handlers[eventName].slice();
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if (!handlers) return;
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for (var i = 0; i < handlers.length; i += 1) {
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handlers[i].call(this, data);
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}
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}
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function get(key) {
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return key ? this._state[key] : this._state;
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}
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function init(component, options) {
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component._observers = { pre: blankObject(), post: blankObject() };
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component._handlers = blankObject();
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component._bind = options._bind;
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component.options = options;
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component.root = options.root || component;
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component.store = component.root.store || options.store;
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}
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function observe(key, callback, options) {
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var group = options && options.defer
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? this._observers.post
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: this._observers.pre;
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(group[key] || (group[key] = [])).push(callback);
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if (!options || options.init !== false) {
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callback.__calling = true;
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callback.call(this, this._state[key]);
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callback.__calling = false;
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}
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return {
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cancel: function() {
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var index = group[key].indexOf(callback);
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if (~index) group[key].splice(index, 1);
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}
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};
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}
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function on(eventName, handler) {
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if (eventName === 'teardown') return this.on('destroy', handler);
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var handlers = this._handlers[eventName] || (this._handlers[eventName] = []);
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handlers.push(handler);
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return {
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cancel: function() {
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var index = handlers.indexOf(handler);
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if (~index) handlers.splice(index, 1);
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}
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};
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}
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function set(newState) {
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this._set(assign({}, newState));
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if (this.root._lock) return;
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this.root._lock = true;
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callAll(this.root._beforecreate);
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callAll(this.root._oncreate);
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callAll(this.root._aftercreate);
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this.root._lock = false;
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}
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function _set(newState) {
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var oldState = this._state,
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changed = {},
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dirty = false;
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for (var key in newState) {
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if (this._differs(newState[key], oldState[key])) changed[key] = dirty = true;
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}
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if (!dirty) return;
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this._state = assign({}, oldState, newState);
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this._recompute(changed, this._state);
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if (this._bind) this._bind(changed, this._state);
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if (this._fragment) {
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dispatchObservers(this, this._observers.pre, changed, this._state, oldState);
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this._fragment.p(changed, this._state);
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dispatchObservers(this, this._observers.post, changed, this._state, oldState);
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}
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}
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function callAll(fns) {
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while (fns && fns.length) fns.shift()();
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}
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function _mount(target, anchor) {
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this._fragment.m(target, anchor);
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}
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function _unmount() {
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if (this._fragment) this._fragment.u();
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}
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var proto = {
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destroy: destroy,
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get: get,
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fire: fire,
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observe: observe,
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on: on,
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set: set,
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teardown: destroy,
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_recompute: noop,
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_set: _set,
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_mount: _mount,
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_unmount: _unmount
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};
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/* generated by Svelte vX.Y.Z */
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function a(x) {
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return x * 2;
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}
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function b(x) {
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return x * 3;
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}
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function create_main_fragment(state, component) {
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return {
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c: noop,
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m: noop,
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p: noop,
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u: noop,
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d: noop
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};
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}
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function SvelteComponent(options) {
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init(this, options);
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this._differs = differsImmutable;
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this._state = assign({}, options.data);
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this._recompute({ x: 1 }, this._state);
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this._fragment = create_main_fragment(this._state, this);
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if (options.target) {
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this._fragment.c();
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this._fragment.m(options.target, options.anchor || null);
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}
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}
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assign(SvelteComponent.prototype, proto);
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SvelteComponent.prototype._recompute = function _recompute(changed, state) {
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if (changed.x) {
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if (this._differs(state.a, (state.a = a(state.x)))) changed.a = true;
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if (this._differs(state.b, (state.b = b(state.x)))) changed.b = true;
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}
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};
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export default SvelteComponent;
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@ -0,0 +1,49 @@
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/* generated by Svelte vX.Y.Z */
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import { assign, differsImmutable, init, noop, proto } from "svelte/shared.js";
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function a(x) {
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return x * 2;
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}
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function b(x) {
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return x * 3;
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}
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function create_main_fragment(state, component) {
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return {
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c: noop,
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m: noop,
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p: noop,
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u: noop,
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d: noop
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};
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}
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function SvelteComponent(options) {
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init(this, options);
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this._differs = differsImmutable;
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this._state = assign({}, options.data);
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this._recompute({ x: 1 }, this._state);
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this._fragment = create_main_fragment(this._state, this);
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if (options.target) {
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this._fragment.c();
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this._fragment.m(options.target, options.anchor || null);
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}
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}
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assign(SvelteComponent.prototype, proto);
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SvelteComponent.prototype._recompute = function _recompute(changed, state) {
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if (changed.x) {
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if (this._differs(state.a, (state.a = a(state.x)))) changed.a = true;
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if (this._differs(state.b, (state.b = b(state.x)))) changed.b = true;
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}
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}
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export default SvelteComponent;
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@ -0,0 +1,8 @@
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<script>
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export default {
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computed: {
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a: x => x * 2,
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b: x => x * 3
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}
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};
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</script>
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