echarts helper 源码
echarts helper 代码
文件路径：/src/component/tooltip/helper.ts
/*
* 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 { TooltipOption } from './TooltipModel';
import Model from '../../model/Model';
import { toCamelCase } from '../../util/format';
import env from 'zrender/src/core/env';
/* global document */
export function shouldTooltipConfine(tooltipModel: Model<TooltipOption>): boolean {
const confineOption = tooltipModel.get('confine');
return confineOption != null
? !!confineOption
// In richText mode, the outside part can not be visible.
: tooltipModel.get('renderMode') === 'richText';
}
function testStyle(styleProps: string[]): string | undefined {
if (!env.domSupported) {
return;
}
const style = document.documentElement.style;
for (let i = 0, len = styleProps.length; i < len; i++) {
if (styleProps[i] in style) {
return styleProps[i];
}
}
}
export const TRANSFORM_VENDOR = testStyle(
['transform', 'webkitTransform', 'OTransform', 'MozTransform', 'msTransform']
);
export const TRANSITION_VENDOR = testStyle(
['webkitTransition', 'transition', 'OTransition', 'MozTransition', 'msTransition']
);
export function toCSSVendorPrefix(styleVendor: string, styleProp: string) {
if (!styleVendor) {
return styleProp;
}
styleProp = toCamelCase(styleProp, true);
const idx = styleVendor.indexOf(styleProp);
styleVendor = idx === -1
? styleProp
: `-${styleVendor.slice(0, idx)}-${styleProp}`;
return styleVendor.toLowerCase();
}
export function getComputedStyle(el: HTMLElement, style?: string) {
const stl = (el as any).currentStyle
|| (document.defaultView && document.defaultView.getComputedStyle(el));
return stl
? style ? stl[style] : stl
: null;
}
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