fonteditor-core
Version:
fonts (ttf, woff, woff2, eot, svg, otf) parse, write, transform, glyph adjust.
266 lines (216 loc) • 7.42 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = void 0;
var _lang = require("../common/lang");
var _error = _interopRequireDefault(require("./error"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); }
function _iterableToArrayLimit(arr, i) { if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === "[object Arguments]")) { return; } var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
// 检查数组支持情况
if (typeof ArrayBuffer === 'undefined' || typeof DataView === 'undefined') {
throw new Error('not support ArrayBuffer and DataView');
} // 数据类型
var dataType = {
Int8: 1,
Int16: 2,
Int32: 4,
Uint8: 1,
Uint16: 2,
Uint32: 4,
Float32: 4,
Float64: 8
};
var Reader = /*#__PURE__*/function () {
/**
* 读取器
*
* @constructor
* @param {Array.<byte>} buffer 缓冲数组
* @param {number} offset 起始偏移
* @param {number} length 数组长度
* @param {boolean} littleEndian 是否小尾
*/
function Reader(buffer, offset, length, littleEndian) {
_classCallCheck(this, Reader);
var bufferLength = buffer.byteLength || buffer.length;
this.offset = offset || 0;
this.length = length || bufferLength - this.offset;
this.littleEndian = littleEndian || false;
this.view = new DataView(buffer, this.offset, this.length);
}
/**
* 读取指定的数据类型
*
* @param {string} type 数据类型
* @param {number=} offset 位移
* @param {boolean=} littleEndian 是否小尾
* @return {number} 返回值
*/
_createClass(Reader, [{
key: "read",
value: function read(type, offset, littleEndian) {
// 使用当前位移
if (undefined === offset) {
offset = this.offset;
} // 使用小尾
if (undefined === littleEndian) {
littleEndian = this.littleEndian;
} // 扩展方法
if (undefined === dataType[type]) {
return this['read' + type](offset, littleEndian);
}
var size = dataType[type];
this.offset = offset + size;
return this.view['get' + type](offset, littleEndian);
}
/**
* 获取指定的字节数组
*
* @param {number} offset 偏移
* @param {number} length 字节长度
* @return {Array} 字节数组
*/
}, {
key: "readBytes",
value: function readBytes(offset) {
var length = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;
if (length == null) {
length = offset;
offset = this.offset;
}
if (length < 0 || offset + length > this.length) {
_error["default"].raise(10001, this.length, offset + length);
}
var buffer = [];
for (var i = 0; i < length; ++i) {
buffer.push(this.view.getUint8(offset + i));
}
this.offset = offset + length;
return buffer;
}
/**
* 读取一个string
*
* @param {number} offset 偏移
* @param {number} length 长度
* @return {string} 字符串
*/
}, {
key: "readString",
value: function readString(offset) {
var length = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;
if (length == null) {
length = offset;
offset = this.offset;
}
if (length < 0 || offset + length > this.length) {
_error["default"].raise(10001, this.length, offset + length);
}
var value = '';
for (var i = 0; i < length; ++i) {
var c = this.readUint8(offset + i);
value += String.fromCharCode(c);
}
this.offset = offset + length;
return value;
}
/**
* 读取一个字符
*
* @param {number} offset 偏移
* @return {string} 字符串
*/
}, {
key: "readChar",
value: function readChar(offset) {
return this.readString(offset, 1);
}
/**
* 读取一个uint24整形
*
* @param {number} offset 偏移
* @return {number}
*/
}, {
key: "readUint24",
value: function readUint24(offset) {
var _this$readBytes = this.readBytes(offset || this.offset, 3),
_this$readBytes2 = _slicedToArray(_this$readBytes, 3),
i = _this$readBytes2[0],
j = _this$readBytes2[1],
k = _this$readBytes2[2];
return (i << 16) + (j << 8) + k;
}
/**
* 读取fixed类型
*
* @param {number} offset 偏移
* @return {number} float
*/
}, {
key: "readFixed",
value: function readFixed(offset) {
if (undefined === offset) {
offset = this.offset;
}
var val = this.readInt32(offset, false) / 65536.0;
return Math.ceil(val * 100000) / 100000;
}
/**
* 读取长日期
*
* @param {number} offset 偏移
* @return {Date} Date对象
*/
}, {
key: "readLongDateTime",
value: function readLongDateTime(offset) {
if (undefined === offset) {
offset = this.offset;
} // new Date(1970, 1, 1).getTime() - new Date(1904, 1, 1).getTime();
var delta = -2077545600000;
var time = this.readUint32(offset + 4, false);
var date = new Date();
date.setTime(time * 1000 + delta);
return date;
}
/**
* 跳转到指定偏移
*
* @param {number} offset 偏移
* @return {Object} this
*/
}, {
key: "seek",
value: function seek(offset) {
if (undefined === offset) {
this.offset = 0;
}
if (offset < 0 || offset > this.length) {
_error["default"].raise(10001, this.length, offset);
}
this.offset = offset;
return this;
}
/**
* 注销
*/
}, {
key: "dispose",
value: function dispose() {
delete this.view;
}
}]);
return Reader;
}(); // 直接支持的数据类型
exports["default"] = Reader;
Object.keys(dataType).forEach(function (type) {
Reader.prototype['read' + type] = (0, _lang.curry)(Reader.prototype.read, type);
});