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Viewing file:     component.js (6.24 KB)      -rw-r--r--

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/

import * as zrUtil from 'zrender/src/core/util';
import {parseClassType} from './clazz';

var base = 0;

/**
 * @public
 * @param {string} type
 * @return {string}
 */
export function getUID(type) {
    // Considering the case of crossing js context,
    // use Math.random to make id as unique as possible.
    return [(type || ''), base++, Math.random().toFixed(5)].join('_');
}

/**
 * @inner
 */
export function enableSubTypeDefaulter(entity) {

    var subTypeDefaulters = {};

    entity.registerSubTypeDefaulter = function (componentType, defaulter) {
        componentType = parseClassType(componentType);
        subTypeDefaulters[componentType.main] = defaulter;
    };

    entity.determineSubType = function (componentType, option) {
        var type = option.type;
        if (!type) {
            var componentTypeMain = parseClassType(componentType).main;
            if (entity.hasSubTypes(componentType) && subTypeDefaulters[componentTypeMain]) {
                type = subTypeDefaulters[componentTypeMain](option);
            }
        }
        return type;
    };

    return entity;
}

/**
 * Topological travel on Activity Network (Activity On Vertices).
 * Dependencies is defined in Model.prototype.dependencies, like ['xAxis', 'yAxis'].
 *
 * If 'xAxis' or 'yAxis' is absent in componentTypeList, just ignore it in topology.
 *
 * If there is circle dependencey, Error will be thrown.
 *
 */
export function enableTopologicalTravel(entity, dependencyGetter) {

    /**
     * @public
     * @param {Array.<string>} targetNameList Target Component type list.
     *                                           Can be ['aa', 'bb', 'aa.xx']
     * @param {Array.<string>} fullNameList By which we can build dependency graph.
     * @param {Function} callback Params: componentType, dependencies.
     * @param {Object} context Scope of callback.
     */
    entity.topologicalTravel = function (targetNameList, fullNameList, callback, context) {
        if (!targetNameList.length) {
            return;
        }

        var result = makeDepndencyGraph(fullNameList);
        var graph = result.graph;
        var stack = result.noEntryList;

        var targetNameSet = {};
        zrUtil.each(targetNameList, function (name) {
            targetNameSet[name] = true;
        });

        while (stack.length) {
            var currComponentType = stack.pop();
            var currVertex = graph[currComponentType];
            var isInTargetNameSet = !!targetNameSet[currComponentType];
            if (isInTargetNameSet) {
                callback.call(context, currComponentType, currVertex.originalDeps.slice());
                delete targetNameSet[currComponentType];
            }
            zrUtil.each(
                currVertex.successor,
                isInTargetNameSet ? removeEdgeAndAdd : removeEdge
            );
        }

        zrUtil.each(targetNameSet, function () {
            throw new Error('Circle dependency may exists');
        });

        function removeEdge(succComponentType) {
            graph[succComponentType].entryCount--;
            if (graph[succComponentType].entryCount === 0) {
                stack.push(succComponentType);
            }
        }

        // Consider this case: legend depends on series, and we call
        // chart.setOption({series: [...]}), where only series is in option.
        // If we do not have 'removeEdgeAndAdd', legendModel.mergeOption will
        // not be called, but only sereis.mergeOption is called. Thus legend
        // have no chance to update its local record about series (like which
        // name of series is available in legend).
        function removeEdgeAndAdd(succComponentType) {
            targetNameSet[succComponentType] = true;
            removeEdge(succComponentType);
        }
    };

    /**
     * DepndencyGraph: {Object}
     * key: conponentType,
     * value: {
     *     successor: [conponentTypes...],
     *     originalDeps: [conponentTypes...],
     *     entryCount: {number}
     * }
     */
    function makeDepndencyGraph(fullNameList) {
        var graph = {};
        var noEntryList = [];

        zrUtil.each(fullNameList, function (name) {

            var thisItem = createDependencyGraphItem(graph, name);
            var originalDeps = thisItem.originalDeps = dependencyGetter(name);

            var availableDeps = getAvailableDependencies(originalDeps, fullNameList);
            thisItem.entryCount = availableDeps.length;
            if (thisItem.entryCount === 0) {
                noEntryList.push(name);
            }

            zrUtil.each(availableDeps, function (dependentName) {
                if (zrUtil.indexOf(thisItem.predecessor, dependentName) < 0) {
                    thisItem.predecessor.push(dependentName);
                }
                var thatItem = createDependencyGraphItem(graph, dependentName);
                if (zrUtil.indexOf(thatItem.successor, dependentName) < 0) {
                    thatItem.successor.push(name);
                }
            });
        });

        return {graph: graph, noEntryList: noEntryList};
    }

    function createDependencyGraphItem(graph, name) {
        if (!graph[name]) {
            graph[name] = {predecessor: [], successor: []};
        }
        return graph[name];
    }

    function getAvailableDependencies(originalDeps, fullNameList) {
        var availableDeps = [];
        zrUtil.each(originalDeps, function (dep) {
            zrUtil.indexOf(fullNameList, dep) >= 0 && availableDeps.push(dep);
        });
        return availableDeps;
    }
}