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import SSVGTransition from './SSVGTransition';
import { createProperty } from './SSVGPropertyFactory';
import SSVGComputed from './SSVGComputed';
import d from 'debug';
const debug = d('ssvg');
/**
* @typedef {import('./SSVGEngine').default} SSVGEngine
* @typedef {import('./SSVGProperty').default} SSVGProperty
*/
export default class SSVGState {
/**
* @param {SSVGEngine} engine
* @param {Element} state
*/
constructor(engine, state) {
debug('loading state');
/** @type {{ [name: string]: SSVGProperty }} */
this.properties = {};
/** @type {SSVGComputed[]} */
this.computed = [];
/** @type {ssvg.StateElement} */
this.elt = /** @type {any} */ (state);
this.svg = engine.svg;
this.selection = engine.selection;
/** @type {CustomEvent<{ state: ssvg.$State | null }>} */
this._evt = new CustomEvent('state', { 'state': null });
this.defaultTransition = new SSVGTransition();
this.defaultTransition.setDefaults();
this._parseState(state);
// $FlowIgnore: we're extending it !
this.elt.updateState = this.updateState.bind(this);
// $FlowIgnore: we're extending it !
this.elt.setState = this.setState.bind(this);
// $FlowIgnore: we're extending it !
this.elt.getState = this.getState.bind(this);
}
disconnect() {
// @ts-ignore: unmounting
delete this.elt.updateState;
// @ts-ignore: unmounting
delete this.elt.setState;
// @ts-ignore: unmounting
delete this.elt.getState;
for (const key in this.properties) {
Iif (!this.properties.hasOwnProperty(key)) {
continue;
}
this.properties[key].disconnect();
}
for (const computed of this.computed) {
computed.disconnect();
}
}
/**
* @param {Element} state
*/
_parseState(state) {
if (state.firstElementChild &&
(state.firstElementChild.nodeName === 'transition')) {
this.defaultTransition.parseTransition(state.firstElementChild);
}
for (let i = 0; i < state.children.length; ++i) {
var children = state.children[i];
if (children.tagName === 'property') {
const prop = createProperty(this, children);
this.properties[prop.name] = prop;
}
else if (children.tagName === 'computed') {
const prop = createProperty(this, children);
this.computed.push(new SSVGComputed(prop, children));
}
}
}
/**
* @param {ssvg.$State} state
*/
updateState(state) {
/** @type {ssvg.$State} */
var event = {};
for (const key in this.properties) {
Iif (!this.properties.hasOwnProperty(key)) {
continue;
}
else if (state.hasOwnProperty(key)) {
this.properties[key].value = state[key];
}
event[key] = this.properties[key].value;
}
this._updateComputed(event);
this._emitEvent(event);
}
/**
* @param {ssvg.$State} state
*/
setState(state) {
/** @type {ssvg.$State} */
const event = {};
for (const key in this.properties) {
Iif (!this.properties.hasOwnProperty(key)) {
continue;
}
this.properties[key].value = state[key];
event[key] = this.properties[key].value;
}
this._updateComputed(event);
this._emitEvent(event);
}
/**
* @param {ssvg.$State} event
*/
_updateComputed(event) {
if (this.computed.length === 0) {
return;
}
for (const computed of this.computed) {
computed.compute(event);
event[computed.property.name] = computed.property.value;
}
}
/**
* @param {ssvg.$State} state
*/
_emitEvent(state) {
this._evt.state = state;
this.elt.dispatchEvent(this._evt);
}
/** @return {ssvg.$State} */
getState() {
/** @type {ssvg.$State} */
var ret = {};
for (const key in this.properties) {
Iif (!this.properties.hasOwnProperty(key)) {
continue;
}
ret[key] = this.properties[key].value;
}
for (const computed of this.computed) {
ret[computed.property.name] = computed.property.value;
}
return ret;
}
}
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