swOperation/node_modules/@antv/gui/esm/util/text.js

import { isString, memoize } from '@antv/util';
var ctx;
/**
 * 计算文本在画布中的宽度
 */
export var measureTextWidth = memoize(function (text, font) {
    var content = isString(text) ? text : text.style.text.toString();
    var _a = font || getFont(text), fontSize = _a.fontSize, fontFamily = _a.fontFamily, fontWeight = _a.fontWeight, fontStyle = _a.fontStyle, fontVariant = _a.fontVariant;
    if (!ctx) {
        ctx = document.createElement('canvas').getContext('2d');
    }
    ctx.font = [fontStyle, fontVariant, fontWeight, "".concat(fontSize, "px"), fontFamily].join(' ');
    return ctx.measureText(content).width;
}, function (text, font) {
    return [isString(text) ? text : text.style.text.toString(), Object.values(font || getFont(text)).join()].join('');
});
export var getFont = function (textShape) {
    var fontFamily = textShape.style.fontFamily || 'sans-serif';
    var fontWeight = textShape.style.fontWeight || 'normal';
    var fontStyle = textShape.style.fontStyle || 'normal';
    var fontVariant = textShape.style.fontVariant;
    var fontSize = textShape.style.fontSize;
    fontSize = typeof fontSize === 'object' ? fontSize.value : fontSize;
    return { fontSize: fontSize, fontFamily: fontFamily, fontWeight: fontWeight, fontStyle: fontStyle, fontVariant: fontVariant };
};
export function textOf(node) {
    if (node.nodeName === 'text') {
        return node;
    }
    if (node.nodeName === 'g' && node.children.length === 1 && node.children[0].nodeName === 'text') {
        return node.children[0];
    }
    return null;
}
export function applyToText(node, style) {
    var text = textOf(node);
    if (text)
        text.attr(style);
}
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