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| 'use strict';
exports.__esModule = true;
exports['default'] = diff;
exports.removeOrphanedChildren = removeOrphanedChildren;
exports.recollectNodeTree = recollectNodeTree;
var _constants = require('../constants');
var _util = require('../util');
var _hooks = require('../hooks');
var _ = require('.');
var _functionalComponent = require('./functional-component');
var _component = require('./component');
var _dom = require('../dom');
var _domRecycler = require('../dom/recycler');
function buildTextNode(dom, str) {
Iif (dom) {
var type = _dom.getNodeType(dom);
if (type === 3) {
if (dom.nodeValue !== str) {
dom.nodeValue = str;
}
return dom;
}
if (type === 1) _domRecycler.collectNode(dom);
}
return document.createTextNode(str);
}
/** Apply differences in a given vnode (and it's deep children) to a real DOM Node.
* @param {Element} [dom=null] A DOM node to mutate into the shape of the `vnode`
* @param {VNode} vnode A VNode (with descendants forming a tree) representing the desired DOM structure
* @returns {Element} dom The created/mutated element
* @private
*/
function diff(dom, vnode, context) {
var originalAttributes = vnode.attributes;
while (_functionalComponent.isFunctionalComponent(vnode)) {
vnode = _functionalComponent.buildFunctionalComponent(vnode, context);
}
if (_util.isFunction(vnode.nodeName)) {
return _component.buildComponentFromVNode(dom, vnode, context);
}
if (_util.isString(vnode)) {
return buildTextNode(dom, vnode);
}
var out = dom,
nodeName = vnode.nodeName || _constants.UNDEFINED_ELEMENT;
if (!dom) {
out = _domRecycler.createNode(nodeName);
} else if (!_.isNamedNode(dom, nodeName)) {
out = _domRecycler.createNode(nodeName);
// move children into the replacement node
_dom.appendChildren(out, _util.toArray(_dom.getChildren(dom)));
// reclaim element nodes
recollectNodeTree(dom);
}
diffNode(out, vnode, context);
if (originalAttributes && originalAttributes.ref) {
// (getNodeData(out).ref = originalAttributes.ref)(out);
(out[_constants.ATTR_KEY].ref = originalAttributes.ref)(out);
}
return out;
}
// let types = window.types = [];
/** Morph a DOM node to look like the given VNode. Creates DOM if it doesn't exist. */
function diffNode(dom, vnode, context) {
// let key = [].slice.call(arguments).map( s => Object.prototype.toString.call(s) ).join(', ');
// if (types.indexOf(key)===-1) types.push(key);
var vchildren = vnode.children,
firstChild = dom.firstChild;
if (vchildren && vchildren.length === 1 && typeof vchildren[0] === 'string' && firstChild instanceof Text && dom.childNodes.length === 1) {
firstChild.nodeValue = vchildren[0];
} else if (vchildren || firstChild) {
innerDiffNode(dom, vchildren, context);
}
// let vchildren = vnode.children,
// children = getChildren(out);
// if (vchildren && vchildren.length===1 && children.length===1 && typeof vchildren[0]==='string' && children[0] instanceof Text) {
// children[0].nodeValue = vchildren[0];
// }
// else if (vchildren || children.length) {
// innerDiffNode(out, vnode, context, children);
// }
// let vchildren = vnode.children,
// children = getChildren(out),
// len = children.length;
// if (vchildren && vchildren.length===1 && isString(vchildren[0]) && children.length===1 && children[0] instanceof Text) {
// children[0].nodeValue = vchildren[0];
// }
// else if (len || vchildren) {
// innerDiffNode(out, vnode, context, children);
// }
// let vchildren = vnode.children,
// children = getChildren(out),
// len = children.length;
// if (vchildren && vchildren.length===1 && isString(vchildren[0])) {
// let fc = out.firstChild;
// if (getNodeType(fc)===3) fc.nodeValue = vchildren[0];
// else out.textContent = vchildren[0];
// }
// else if (len || vchildren) {
// innerDiffNode(out, vnode, context, children);
// }
// let children = getChildren(out);
// if (vnode.children || children) {
// innerDiffNode(out, vnode, context, children);
// }
diffAttributes(dom, vnode);
}
function getKey(child) {
// let component = getComponentForNode(child),
// key;
// if (component!==undefined) {
// key = getKeyForComponent(component);
// }
// else {
// key = getAccessor(child, 'key');
// }
// let component = getComponentForNode(child),
// key = component ? component.__key : getAccessor(child, 'key');
var data = _dom.getNodeData(child),
key = data !== undefined && data.key;
return _util.empty(key) ? '' : key;
}
function getKeyForComponent(component) {
Iif (component.__key !== undefined && component.__key !== null) return String(component.__key);
return '';
}
function getComponentForNode(node) {
// try { return node._component; } catch (err) {}
if (node._component !== undefined && node._component !== null) return node._component;
}
/** Apply child and attribute changes between a VNode and a DOM Node to the DOM. */
function innerDiffNode(dom, vchildren, context) {
var originalChildren = _dom.getChildren(dom),
children = undefined,
keyed = undefined,
keyedLen = 0,
min = 0,
vlen = vchildren && vchildren.length,
len = originalChildren.length,
childrenLen = 0;
if (len) {
children = [];
for (var i = 0; i < len; i++) {
var child = originalChildren[i],
key = !_util.empty(child._component) ? getKeyForComponent(child._component) : getKey(child);
if (!_util.empty(key) && key !== '') {
Eif (!keyed) keyed = {};
keyed[key] = child;
keyedLen++;
} else {
children[childrenLen++] = child;
}
}
}
if (vlen) {
for (var i = 0; i < vlen; i++) {
var vchild = vchildren[i],
child = undefined;
// if (isFunctionalComponent(vchild)) {
// vchild = buildFunctionalComponent(vchild);
// }
// attempt to find a node based on key matching
if (keyedLen !== 0 && vchild.attributes) {
var key = vchild.attributes.key;
Iif (!_util.empty(key) && _util.hasOwnProperty.call(keyed, key)) {
child = keyed[key];
keyed[key] = null;
keyedLen--;
}
}
// attempt to pluck a node of the same type from the existing children
if (!child && min < childrenLen) {
for (var j = min; j < childrenLen; j++) {
var c = children[j];
if (c && _.isSameNodeType(c, vchild)) {
child = c;
children[j] = null;
if (j === childrenLen - 1) childrenLen--;
Eif (j === min) min++;
break;
}
}
}
// morph the matched/found/created DOM child to match vchild (deep)
child = diff(child, vchild, context);
if (originalChildren[i] !== child) {
// let c = !child.parentNode && getComponentForNode(child),
var c = child.parentNode !== dom && getComponentForNode(child),
next = originalChildren[i + 1];
if (c) _hooks.deepHook(c, 'componentWillMount');
if (next) {
dom.insertBefore(child, next);
} else {
dom.appendChild(child);
}
if (c) _hooks.deepHook(c, 'componentDidMount');
}
}
}
if (keyedLen) {
/*eslint guard-for-in:0*/
for (var i in keyed) {
Eif (_util.hasOwnProperty.call(keyed, i) && keyed[i]) {
children[min = childrenLen++] = keyed[i];
}
}
}
// remove orphaned children
if (min < childrenLen) {
removeOrphanedChildren(children);
}
}
/** Reclaim children that were unreferenced in the desired VTree */
function removeOrphanedChildren(children, unmountOnly) {
for (var i = children.length; i--;) {
var child = children[i];
Eif (child) {
recollectNodeTree(child, unmountOnly);
}
}
}
/** Reclaim an entire tree of nodes, starting at the root. */
function recollectNodeTree(node, unmountOnly) {
// @TODO: Need to make a call on whether Preact should remove nodes not created by itself.
// Currently it *does* remove them. Discussion: https://github.com/developit/preact/issues/39
//if (!node[ATTR_KEY]) return;
// let attrs = getNodeData(node);
var attrs = node[_constants.ATTR_KEY];
if (attrs) _hooks.hook(attrs, 'ref', null);
var component = getComponentForNode(node);
if (component) {
_component.unmountComponent(component, !unmountOnly);
} else {
if (!unmountOnly) {
if (_dom.getNodeType(node) !== 1) {
_dom.removeNode(node);
return;
}
_domRecycler.collectNode(node);
}
var c = node.childNodes;
if (c && c.length) {
removeOrphanedChildren(c, unmountOnly);
}
}
}
/** Apply differences in attributes from a VNode to the given DOM Node. */
function diffAttributes(dom, vnode) {
var old = _dom.getNodeAttributes(dom),
attrs = vnode.attributes;
removeAttributes(dom, old, attrs || _constants.EMPTY);
// new & updated
if (attrs) {
for (var _name in attrs) {
// let value = attrs[name];
var value = attrs[_name] === undefined ? null : attrs[_name];
// if (value===undefined) value = null;
// if (!empty(value) && value!=getAccessor(dom, name)) {
// if (!empty(value) && value!=old[name]) {
if (value != old[_name]) {
_dom.setAccessor(dom, _name, value);
}
}
}
}
function removeAttributes(dom, prev, next) {
try {
for (var _name2 in prev) {
// if (empty(next[name])) {
if (!next.hasOwnProperty(_name2)) {
_dom.setAccessor(dom, _name2, null);
}
}
} catch (e) {}
}
|