echarts textStyle 源码
echarts textStyle 代码
文件路径：/src/model/mixin/textStyle.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 * as graphicUtil from '../../util/graphic';
import {getFont} from '../../label/labelStyle';
import Model from '../Model';
import { LabelOption, ColorString } from '../../util/types';
import ZRText, {TextStyleProps} from 'zrender/src/graphic/Text';
const PATH_COLOR = ['textStyle', 'color'] as const;
export type LabelFontOption = Pick<LabelOption, 'fontStyle' | 'fontWeight' | 'fontSize' | 'fontFamily'>;
type LabelRectRelatedOption = Pick<LabelOption,
'align' | 'verticalAlign' | 'padding' | 'lineHeight' | 'baseline' | 'rich'
| 'width' | 'height' | 'overflow'
> & LabelFontOption;
const textStyleParams = [
'fontStyle', 'fontWeight', 'fontSize', 'fontFamily', 'padding',
'lineHeight', 'rich', 'width', 'height', 'overflow'
] as const;
// TODO Performance improvement?
const tmpText = new ZRText();
class TextStyleMixin {
/**
* Get color property or get color from option.textStyle.color
*/
// TODO Callback
getTextColor(this: Model, isEmphasis?: boolean): ColorString {
const ecModel = this.ecModel;
return this.getShallow('color')
|| (
(!isEmphasis && ecModel) ? ecModel.get(PATH_COLOR) : null
);
}
/**
* Create font string from fontStyle, fontWeight, fontSize, fontFamily
* @return {string}
*/
getFont(this: Model<LabelFontOption>) {
return getFont({
fontStyle: this.getShallow('fontStyle'),
fontWeight: this.getShallow('fontWeight'),
fontSize: this.getShallow('fontSize'),
fontFamily: this.getShallow('fontFamily')
}, this.ecModel);
}
getTextRect(this: Model<LabelRectRelatedOption> & TextStyleMixin, text: string): graphicUtil.BoundingRect {
const style: TextStyleProps = {
text: text,
verticalAlign: this.getShallow('verticalAlign')
|| this.getShallow('baseline')
};
for (let i = 0; i < textStyleParams.length; i++) {
(style as any)[textStyleParams[i]] = this.getShallow(textStyleParams[i]);
}
tmpText.useStyle(style);
tmpText.update();
return tmpText.getBoundingRect();
}
};
export default TextStyleMixin;
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