@visactor/vrender-core/es/graphic/state/state-engine.js

```typescript import { xxx } from '@visactor/vrender-core'; ```

function isPlainObject(value) {
    return null != value && "object" == typeof value && !Array.isArray(value);
}

function cloneValue(value) {
    if (!isPlainObject(value)) return value;
    const clone = {};
    return Object.keys(value).forEach((key => {
        clone[key] = cloneValue(value[key]);
    })), clone;
}

function deepMerge(base, value) {
    var _a;
    const result = null !== (_a = cloneValue(base)) && void 0 !== _a ? _a : {};
    return Object.keys(value).forEach((key => {
        const nextValue = value[key], previousValue = result[key];
        isPlainObject(previousValue) && isPlainObject(nextValue) ? result[key] = deepMerge(previousValue, nextValue) : result[key] = cloneValue(nextValue);
    })), result;
}

export class StateEngine {
    constructor(options) {
        var _a;
        this._activeStates = [], this._effectiveStates = [], this._suppressed = [], this._resolvedPatch = {}, 
        this.resolverPatchCache = new Map, this.resolverCacheKey = "", this.resolverCacheValid = !1, 
        this.baseAttributes = {}, this.compiledDefinitions = options.compiledDefinitions, 
        this.stateSort = options.stateSort, this.mergeMode = null !== (_a = options.mergeMode) && void 0 !== _a ? _a : "shallow";
    }
    get activeStates() {
        return this._activeStates;
    }
    get effectiveStates() {
        return this._effectiveStates;
    }
    get resolvedPatch() {
        return this._resolvedPatch;
    }
    get suppressed() {
        return this._suppressed;
    }
    setResolveContext(graphic, baseAttributes) {
        this.graphic === graphic && this.baseAttributes === baseAttributes || this.invalidateResolverCache(), 
        this.graphic = graphic, this.baseAttributes = baseAttributes;
    }
    applyStates(stateNames) {
        const uniqueStates = Array.from(new Set(stateNames)), sortedStates = this.sortStates(uniqueStates), adjudicated = this.adjudicate(sortedStates), activeStates = adjudicated.active, effectiveStates = activeStates.filter((stateName => !adjudicated.suppressedSet.has(stateName))), suppressed = activeStates.filter((stateName => adjudicated.suppressedSet.has(stateName))), changed = !this.sameArray(this._activeStates, activeStates) || !this.sameArray(this._effectiveStates, effectiveStates) || !this.sameArray(this._suppressed, suppressed);
        return this._activeStates = activeStates, this._effectiveStates = effectiveStates, 
        this._suppressed = suppressed, !changed && this.resolverCacheValid || this.recomputePatch(effectiveStates), 
        {
            changed: changed,
            activeStates: [ ...this._activeStates ],
            effectiveStates: [ ...this._effectiveStates ],
            suppressed: [ ...this._suppressed ]
        };
    }
    addState(stateName, keepCurrentStates) {
        if (this._activeStates.includes(stateName) && (keepCurrentStates || 1 === this._activeStates.length)) return {
            changed: !1,
            activeStates: [ ...this._activeStates ],
            effectiveStates: [ ...this._effectiveStates ],
            suppressed: [ ...this._suppressed ]
        };
        const nextStates = keepCurrentStates && this._activeStates.length ? this._activeStates.concat([ stateName ]) : [ stateName ];
        return this.applyStates(nextStates);
    }
    removeState(stateNames) {
        if (!this._activeStates.length) return {
            changed: !1,
            activeStates: [],
            effectiveStates: [],
            suppressed: []
        };
        const filteredNames = Array.isArray(stateNames) ? this._activeStates.filter((stateName => !stateNames.includes(stateName))) : this._activeStates.filter((stateName => stateName !== stateNames));
        return filteredNames.length === this._activeStates.length ? {
            changed: !1,
            activeStates: [ ...this._activeStates ],
            effectiveStates: [ ...this._effectiveStates ],
            suppressed: [ ...this._suppressed ]
        } : this.applyStates(filteredNames);
    }
    toggleState(stateName) {
        return this.hasState(stateName) ? this.removeState(stateName) : this.applyStates(this._activeStates.concat([ stateName ]));
    }
    clearStates() {
        const changed = this._activeStates.length > 0 || this._effectiveStates.length > 0 || this._suppressed.length > 0;
        return this._activeStates = [], this._effectiveStates = [], this._suppressed = [], 
        this._resolvedPatch = {}, this.resolverPatchCache.clear(), this.resolverCacheKey = "", 
        this.resolverCacheValid = !1, {
            changed: changed,
            activeStates: [],
            effectiveStates: [],
            suppressed: []
        };
    }
    invalidateResolverCache() {
        this.resolverPatchCache.clear(), this.resolverCacheKey = "", this.resolverCacheValid = !1;
    }
    hasState(stateName) {
        return !!this._activeStates.length && (null == stateName || this._activeStates.includes(stateName));
    }
    sortStates(states) {
        const withDefinition = [], withoutDefinition = [];
        return states.forEach((stateName => {
            this.compiledDefinitions.has(stateName) ? withDefinition.push(stateName) : withoutDefinition.push(stateName);
        })), withDefinition.sort(((left, right) => {
            const leftDefinition = this.compiledDefinitions.get(left), rightDefinition = this.compiledDefinitions.get(right);
            return leftDefinition && rightDefinition ? leftDefinition.priority !== rightDefinition.priority ? leftDefinition.priority - rightDefinition.priority : leftDefinition.rank - rightDefinition.rank : 0;
        })), this.stateSort && withoutDefinition.length > 1 && withoutDefinition.sort(this.stateSort), 
        withDefinition.concat(withoutDefinition);
    }
    adjudicate(sortedStates) {
        const candidate = sortedStates.slice(), suppressedSet = new Set;
        for (let index = candidate.length - 1; index >= 0; index--) {
            const stateName = candidate[index], definition = this.compiledDefinitions.get(stateName);
            definition && (definition.exclude.forEach((excludedState => {
                const excludedIndex = candidate.indexOf(excludedState);
                -1 !== excludedIndex && (candidate.splice(excludedIndex, 1), excludedIndex < index && (index -= 1));
            })), definition.suppress.forEach((suppressedState => {
                suppressedSet.add(suppressedState);
            })));
        }
        return {
            active: candidate,
            suppressedSet: suppressedSet
        };
    }
    recomputePatch(effectiveStates) {
        const cacheKey = effectiveStates.join(","), nextPatch = {}, useResolverCache = this.resolverCacheValid && this.resolverCacheKey === cacheKey;
        useResolverCache || (this.resolverPatchCache.clear(), this.resolverCacheKey = cacheKey), 
        effectiveStates.forEach((stateName => {
            var _a;
            const definition = this.compiledDefinitions.get(stateName);
            if (definition && (definition.patch && this.mergeInto(nextPatch, definition.patch), 
            definition.hasResolver)) {
                const resolverPatch = useResolverCache ? this.resolverPatchCache.get(stateName) : null === (_a = definition.resolver) || void 0 === _a ? void 0 : _a.call(definition, {
                    graphic: this.graphic,
                    activeStates: this._activeStates,
                    effectiveStates: this._effectiveStates,
                    baseAttributes: this.baseAttributes,
                    resolvedPatch: nextPatch
                });
                resolverPatch && (useResolverCache || this.resolverPatchCache.set(stateName, resolverPatch), 
                this.mergeInto(nextPatch, resolverPatch));
            }
        })), useResolverCache || (this.resolverCacheValid = !0), this._resolvedPatch = nextPatch;
    }
    mergeInto(target, patch) {
        "deep" !== this.mergeMode ? Object.keys(patch).forEach((key => {
            target[key] = cloneValue(patch[key]);
        })) : Object.keys(patch).forEach((key => {
            var _a;
            const nextValue = patch[key], previousValue = target[key], baseValue = null === (_a = this.baseAttributes) || void 0 === _a ? void 0 : _a[key];
            isPlainObject(previousValue) && isPlainObject(nextValue) ? target[key] = deepMerge(previousValue, nextValue) : !isPlainObject(previousValue) && isPlainObject(baseValue) && isPlainObject(nextValue) ? target[key] = deepMerge(baseValue, nextValue) : target[key] = cloneValue(nextValue);
        }));
    }
    sameArray(left, right) {
        if (left.length !== right.length) return !1;
        for (let index = 0; index < left.length; index++) if (left[index] !== right[index]) return !1;
        return !0;
    }
}
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