82 lines
2.4 KiB
JavaScript
82 lines
2.4 KiB
JavaScript
/**
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* echarts层级查找方法
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*
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* @desc echarts基于Canvas，纯Javascript图表库，提供直观，生动，可交互，可个性化定制的数据统计图表。
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* @author Kener (@Kener-林峰, kener.linfeng@gmail.com)
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*
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*/
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define(function(require) {
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var zrUtil = require('zrender/tool/util');
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/**
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* 获取嵌套选项的基础方法
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* 返回optionTarget中位于optionLocation上的值，如果没有定义，则返回undefined
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*/
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function query(optionTarget, optionLocation) {
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if (typeof optionTarget == 'undefined') {
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return;
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}
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if (!optionLocation) {
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return optionTarget;
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}
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optionLocation = optionLocation.split('.');
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var length = optionLocation.length;
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var curIdx = 0;
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while (curIdx < length) {
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optionTarget = optionTarget[optionLocation[curIdx]];
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if (typeof optionTarget == 'undefined') {
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return;
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}
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curIdx++;
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}
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return optionTarget;
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}
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/**
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* 获取多级控制嵌套属性的基础方法
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* 返回ctrList中优先级最高（最靠前）的非undefined属性，ctrList中均无定义则返回undefined
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*/
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function deepQuery(ctrList, optionLocation) {
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var finalOption;
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for (var i = 0, l = ctrList.length; i < l; i++) {
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finalOption = query(ctrList[i], optionLocation);
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if (typeof finalOption != 'undefined') {
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return finalOption;
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}
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}
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}
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/**
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* 获取多级控制嵌套属性的基础方法
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* 根据ctrList中优先级合并产出目标属性
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*/
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function deepMerge(ctrList, optionLocation) {
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var finalOption;
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var len = ctrList.length;
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while (len--) {
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var tempOption = query(ctrList[len], optionLocation);
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if (typeof tempOption != 'undefined') {
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if (typeof finalOption == 'undefined') {
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finalOption = zrUtil.clone(tempOption);
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}
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else {
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zrUtil.merge(
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finalOption, tempOption, true
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);
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}
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}
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}
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return finalOption;
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}
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return {
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query : query,
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deepQuery : deepQuery,
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deepMerge : deepMerge
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};
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});
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