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102 lines
3.3 KiB
Plaintext
102 lines
3.3 KiB
Plaintext
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = ttf2symbol;
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exports.getSymbolId = getSymbolId;
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var _string = _interopRequireDefault(require("../common/string"));
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var _ttfreader = _interopRequireDefault(require("./ttfreader"));
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var _contours2svg = _interopRequireDefault(require("./util/contours2svg"));
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var _pathsUtil = _interopRequireDefault(require("../graphics/pathsUtil"));
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var _error = _interopRequireDefault(require("./error"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* @file ttf 转 svg symbol
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* @author mengke01(kekee000@gmail.com)
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*/
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// xml 模板
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var XML_TPL = '' + '<svg style="position: absolute; width: 0; height: 0;" width="0" height="0" version="1.1"' + ' xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">' + '<defs>${symbolList}</defs>' + '</svg>';
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// symbol 模板
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var SYMBOL_TPL = '' + '<symbol id="${id}" viewBox="0 ${descent} ${unitsPerEm} ${unitsPerEm}">' + '<path d="${d}"></path>' + '</symbol>';
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/**
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* 根据 glyf 获取 symbo 名称
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* 1. 有 `name` 属性则使用 name 属性
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* 2. 有 `unicode` 属性则取 unicode 第一个: 'uni' + unicode
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* 3. 使用索引号作为 id: 'symbol' + index
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*
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* @param {Object} glyf glyf 对象
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* @param {number} index glyf 索引
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* @return {string}
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*/
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function getSymbolId(glyf, index) {
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if (glyf.name) {
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return glyf.name;
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}
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if (glyf.unicode && glyf.unicode.length) {
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return 'uni-' + glyf.unicode[0];
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}
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return 'symbol-' + index;
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}
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/**
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* ttf数据结构转svg
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*
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* @param {ttfObject} ttf ttfObject对象
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* @param {Object} options 选项
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* @param {Object} options.metadata 字体相关的信息
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* @return {string} svg字符串
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*/
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// eslint-disable-next-line no-unused-vars
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function ttfobject2symbol(ttf) {
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var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
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var xmlObject = {};
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var unitsPerEm = ttf.head.unitsPerEm;
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var descent = ttf.hhea.descent;
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// glyf 信息
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var symbolList = '';
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for (var i = 1, l = ttf.glyf.length; i < l; i++) {
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var glyf = ttf.glyf[i];
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// 筛选简单字形，并且有轮廓，有编码
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if (!glyf.compound && glyf.contours) {
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var contours = _pathsUtil.default.flip(glyf.contours);
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var glyfObject = {
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descent: descent,
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unitsPerEm: unitsPerEm,
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id: getSymbolId(glyf, i),
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d: (0, _contours2svg.default)(contours)
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};
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symbolList += _string.default.format(SYMBOL_TPL, glyfObject);
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}
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}
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xmlObject.symbolList = symbolList;
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return _string.default.format(XML_TPL, xmlObject);
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}
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/**
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* ttf格式转换成svg字体格式
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*
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* @param {ArrayBuffer|ttfObject} ttfBuffer ttf缓冲数组或者ttfObject对象
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* @param {Object} options 选项
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* @param {Object} options.metadata 字体相关的信息
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*
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* @return {string} svg字符串
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*/
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function ttf2symbol(ttfBuffer) {
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var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
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// 读取ttf二进制流
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if (ttfBuffer instanceof ArrayBuffer) {
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var reader = new _ttfreader.default();
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var ttfObject = reader.read(ttfBuffer);
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reader.dispose();
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return ttfobject2symbol(ttfObject, options);
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}
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// 读取ttfObject
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else if (ttfBuffer.version && ttfBuffer.glyf) {
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return ttfobject2symbol(ttfBuffer, options);
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}
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_error.default.raise(10112);
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} |