all files / src/vdom/ component.js

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'use strict';
 
exports.__esModule = true;
exports.triggerComponentRender = triggerComponentRender;
exports.setComponentProps = setComponentProps;
exports.renderComponent = renderComponent;
exports.buildComponentFromVNode = buildComponentFromVNode;
exports.unmountComponent = unmountComponent;
 
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
 
var _constants = require('../constants');
 
var _options = require('../options');
 
var _options2 = _interopRequireDefault(_options);
 
var _util = require('../util');
 
var _hooks = require('../hooks');
 
var _renderQueue = require('../render-queue');
 
var _ = require('.');
 
var _diff = require('./diff');
 
var _diff2 = _interopRequireDefault(_diff);
 
var _componentRecycler = require('./component-recycler');
 
var _dom = require('../dom');
 
/** Mark component as dirty and queue up a render.
 *	@param {Component} component
 *	@private
 */
 
function triggerComponentRender(component) {
	if (!component._dirty) {
		component._dirty = true;
		_renderQueue.enqueueRender(component);
	}
}
 
// function getComponentBase(component) {
// 	// try { return component.base; } catch (err) {}
// 	if (component.base!==undefined) return component.base;
// }
 
// let types = window.types = [];
 
/** Set a component's `props` (generally derived from JSX attributes).
 *	@param {Object} props
 *	@param {Object} [opts]
 *	@param {boolean} [opts.renderSync=false]	If `true` and {@link options.syncComponentUpdates} is `true`, triggers synchronous rendering.
 *	@param {boolean} [opts.render=true]			If `false`, no render will be triggered.
 */
 
function setComponentProps(component, props, opts, context) {
	var d = component._disableRendering === true;
	component._disableRendering = true;
 
	component.__ref = props.ref;
	component.__key = props.key;
	if (props.ref) delete props.ref;
	Iif (props.key) delete props.key;
 
	if (component.base !== undefined && component.base !== null) {
		_hooks.hook(component, 'componentWillReceiveProps', props, context);
	}
 
	if (context && context !== component.context) {
		Eif (!component.prevContext) component.prevContext = component.context;
		component.context = context;
	}
 
	Eif (!component.prevProps) component.prevProps = component.props;
	component.props = props;
 
	component._disableRendering = d;
 
	if (opts !== _constants.NO_RENDER) {
		Eif (opts === _constants.SYNC_RENDER || _options2['default'].syncComponentUpdates !== false) {
			renderComponent(component);
		} else {
			triggerComponentRender(component);
		}
	}
 
	_hooks.hook(component, '__ref', component);
}
 
/** Render a Component, triggering necessary lifecycle events and taking High-Order Components into account.
 *	@param {Component} component
 *	@param {Object} [opts]
 *	@param {boolean} [opts.build=false]		If `true`, component will build and store a DOM node if not already associated with one.
 *	@private
 */
 
function renderComponent(component, opts) {
	Iif (component._disableRendering) return;
 
	var skip = undefined,
	    rendered = undefined,
	    props = component.props,
	    state = component.state,
	    context = component.context,
	    previousProps = component.prevProps || props,
	    previousState = component.prevState || state,
	    previousContext = component.prevContext || context,
	    isUpdate = component.base,
	    initialBase = isUpdate || component.nextBase;
 
	// if updating
	if (isUpdate) {
		component.props = previousProps;
		component.state = previousState;
		component.context = previousContext;
		Iif (_hooks.hook(component, 'shouldComponentUpdate', props, state, context) === false) {
			skip = true;
		} else {
			_hooks.hook(component, 'componentWillUpdate', props, state, context);
		}
		component.props = props;
		component.state = state;
		component.context = context;
	}
 
	component.prevProps = component.prevState = component.prevContext = component.nextBase = null;
	component._dirty = false;
 
	Eif (!skip) {
		rendered = _hooks.hook(component, 'render', props, state, context);
 
		var childComponent = rendered && rendered.nodeName,
		    childContext = component.getChildContext ? component.getChildContext() : context,
		    // @TODO might want to clone() new context obj
		toUnmount = undefined,
		    base = undefined;
 
		if (_util.isFunction(childComponent) && childComponent.prototype.render) {
			// set up high order component link
 
			var inst = component._component;
			Iif (inst && inst.constructor !== childComponent) {
				toUnmount = inst;
				inst = null;
			}
 
			var childProps = _.getNodeProps(rendered);
 
			if (inst) {
				setComponentProps(inst, childProps, _constants.SYNC_RENDER, childContext);
			} else {
				inst = _componentRecycler.createComponent(childComponent, childProps, childContext);
				inst._parentComponent = component;
				component._component = inst;
				Iif (isUpdate) _hooks.deepHook(inst, 'componentWillMount');
				setComponentProps(inst, childProps, _constants.NO_RENDER, childContext);
				renderComponent(inst, _constants.DOM_RENDER);
				Iif (isUpdate) _hooks.deepHook(inst, 'componentDidMount');
			}
 
			base = inst.base;
		} else {
			var cbase = initialBase;
 
			// destroy high order component link
			toUnmount = component._component;
			if (toUnmount) {
				cbase = component._component = null;
			}
 
			Eif (initialBase || opts === _constants.DOM_RENDER) {
				base = _diff2['default'](cbase, rendered || _constants.EMPTY_BASE, childContext);
			}
		}
 
		if (initialBase && base !== initialBase) {
			var p = initialBase.parentNode;
			if (p && base !== p) p.replaceChild(base, initialBase);
		}
 
		if (toUnmount) {
			unmountComponent(toUnmount, true);
		}
 
		component.base = base;
		Eif (base) {
			var componentRef = component,
			    t = component;
			while (t = t._parentComponent) {
				componentRef = t;
			}
			base._component = componentRef;
			base._componentConstructor = componentRef.constructor;
		}
 
		if (isUpdate) {
			_hooks.hook(component, 'componentDidUpdate', previousProps, previousState, previousContext);
		}
	}
 
	var cb = component._renderCallbacks,
	    fn = undefined;
	Iif (cb) while (fn = cb.pop()) fn.call(component);
 
	return rendered;
}
 
/** Apply the Component referenced by a VNode to the DOM.
 *	@param {Element} dom	The DOM node to mutate
 *	@param {VNode} vnode	A Component-referencing VNode
 *	@returns {Element} dom	The created/mutated element
 *	@private
 */
 
function buildComponentFromVNode(dom, vnode, context) {
	var c = dom && dom._component,
	    oldDom = dom;
 
	var isOwner = c && dom._componentConstructor === vnode.nodeName;
	while (c && !isOwner && (c = c._parentComponent)) {
		isOwner = c.constructor === vnode.nodeName;
	}
 
	if (isOwner) {
		setComponentProps(c, _.getNodeProps(vnode), _constants.SYNC_RENDER, context);
		dom = c.base;
	} else {
		Iif (c) {
			unmountComponent(c, true);
			dom = oldDom = null;
		}
		dom = createComponentFromVNode(vnode, dom, context);
		if (oldDom && dom !== oldDom) {
			oldDom._component = null;
			_diff.recollectNodeTree(oldDom);
		}
	}
 
	return dom;
}
 
/** Instantiate and render a Component, given a VNode whose nodeName is a constructor.
 *	@param {VNode} vnode
 *	@private
 */
function createComponentFromVNode(vnode, dom, context) {
	var props = _.getNodeProps(vnode);
	var component = _componentRecycler.createComponent(vnode.nodeName, props, context);
 
	if (dom && !component.base) component.base = dom;
 
	setComponentProps(component, props, _constants.NO_RENDER, context);
	renderComponent(component, _constants.DOM_RENDER);
 
	// let node = component.base;
	//if (!node._component) {
	//	node._component = component;
	//	node._componentConstructor = vnode.nodeName;
	//}
 
	return component.base;
}
 
/** Remove a component from the DOM and recycle it.
 *	@param {Element} dom			A DOM node from which to unmount the given Component
 *	@param {Component} component	The Component instance to unmount
 *	@private
 */
 
function unmountComponent(component, remove) {
	// console.log(`${remove?'Removing':'Unmounting'} component: ${component.constructor.name}`, component);
 
	_hooks.hook(component, '__ref', null);
	_hooks.hook(component, 'componentWillUnmount');
 
	// recursively tear down & recollect high-order component children:
	var inner = component._component;
	if (inner) {
		unmountComponent(inner, remove);
		remove = false;
	}
 
	var base = component.base;
	Eif (base) {
		if (remove !== false) _dom.removeNode(base);
		_diff.removeOrphanedChildren(base.childNodes, true);
	}
 
	if (remove) {
		component._parentComponent = null;
		_componentRecycler.collectComponent(component);
	}
 
	_hooks.hook(component, 'componentDidUnmount');
}