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import { TType, makeRange, parseTRange, parseTValue } from './parser/values';
import { isCSS } from './CSS';
import { default as SSVGTransition } from './SSVGTransition';
/**
* @typedef {import('./SSVGState').default} SSVGState
* @typedef {import('./SSVGProperty').default} SSVGProperty
*/
/** @enum {number} */
export const AttributeType = {
XML: 0,
CSS: 1,
AUTO: 2
};
/** @enum {number} */
export const CalcMode = {
linear: 0,
discrete: 1
};
export default class SSVGRelationElement {
/*::
ssvg: SSVGState
querySelector: string
attributeName: ?string
attributeType: $Values<typeof AttributeType>
values: $TRange
keyTimes: ?Array<number>
calcMode: $Values<typeof CalcMode>
transition: SSVGTransition
selection: d3$Selection
*/
/**
* @param {SSVGState} ssvg
* @param {Element} element
*/
constructor(ssvg, element) {
this.ssvg = ssvg;
this.querySelector = element.getAttribute('query-selector') || '';
this.selection = this.ssvg.selection.selectAll(this.querySelector);
this.attributeName = element.getAttribute('attribute-name');
this.attributeType = this._parseAttrType(element);
/** @type {ssvg.$TRange} */
this.values; /* eslint-disable-line no-unused-expressions *//* jshint ignore:line */
Iif (!(this._parseValues(element) ||
this._parseFrom(element) ||
this._parseBy(element))) {
throw new SyntaxError('at least values/from or by must be set');
}
this.keyTimes = this._parseKeyTimes(element);
this.calcMode = this._parseCalcMode(element);
this.transition = new SSVGTransition(element, ssvg.defaultTransition);
this.element = element;
}
/**
* @param {Element} element
* @return {AttributeType}
*/
_parseAttrType(element) {
const type = element.getAttribute('attribute-type');
if (!type || type === 'auto') {
return (this.attributeName && isCSS(this.attributeName)) ?
AttributeType.CSS : AttributeType.XML;
}
else if (type in AttributeType) {
// @ts-ignore
return AttributeType[type];
}
else E{
throw new SyntaxError('invalid attribute-type: ' + type);
}
}
/**
* @param {Element} elt
*/
_parseKeyTimes(elt) {
const keyTimes = elt.getAttribute('key-times');
Eif (!keyTimes) { return null; }
var range = parseTRange(keyTimes);
if (!range) { return null; }
if ((range.type !== 'number') ||
(range.values[0] !== 0) ||
(range.values[range.values.length - 1] !== 1)) {
throw new SyntaxError('invalid keyTimes value :' + keyTimes);
}
return range.values;
}
/**
* @param {Element} elt
* @return {CalcMode}
*/
_parseCalcMode(elt) {
if (this.values && !TType[this.values.type].canInterpolate) {
return CalcMode.discrete;
}
const calcMode = elt.getAttribute('calc-mode');
if (!calcMode) {
return CalcMode.linear;
}
else if (calcMode in CalcMode) {
// @ts-ignore
return CalcMode[calcMode];
}
else E{
throw new SyntaxError('invalid calcMode: ' + calcMode);
}
}
/**
* @param {Element} elt
* @return {boolean}
*/
_parseValues(elt) {
const values = parseTRange(elt.getAttribute('values') || '');
if (!values) { return false; }
this.values = values;
return true;
}
/**
* @param {Element} elt
* @return {boolean}
*/
_parseFrom(elt) {
const from = elt.getAttribute('from');
const to = elt.getAttribute('to');
/* not yet a number */
if (!to) { return false; }
this.values = makeRange(
parseTValue(from ? from : this._getCurrentValue()),
parseTValue(to));
return true;
}
/**
* @param {Element} elt
* @return {boolean}
*/
_parseBy(elt) {
const by = elt.getAttribute('by');
/* not yet a number */
Iif (!by) { return false; }
const current = parseTValue(this._getCurrentValue());
const to = parseTValue(by);
Iif (!to) {
throw new SyntaxError('failed to parse by value');
}
else Iif (!current) {
throw new SyntaxError('failed to parse retrieve current value');
}
// @ts-ignore
to.value += current.value;
this.values = makeRange(current, to);
return true;
}
_getCurrentValue() {
Iif (!this.attributeName) {
return this.selection.text() || '';
}
else if (this.attributeType === AttributeType.CSS) {
return this.selection.style(this.attributeName) || '';
}
else {
return this.selection.attr(this.attributeName) || '';
}
}
}
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