pdf-lib
Version:
Create and modify PDF files with JavaScript
68 lines • 3.1 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var CustomFontEmbedder_1 = tslib_1.__importDefault(require("./CustomFontEmbedder"));
var PDFHexString_1 = tslib_1.__importDefault(require("../objects/PDFHexString"));
var utils_1 = require("../../utils");
/**
* A note of thanks to the developers of https://github.com/foliojs/pdfkit, as
* this class borrows from:
* https://github.com/devongovett/pdfkit/blob/e71edab0dd4657b5a767804ba86c94c58d01fbca/lib/image/jpeg.coffee
*/
var CustomFontSubsetEmbedder = /** @class */ (function (_super) {
tslib_1.__extends(CustomFontSubsetEmbedder, _super);
function CustomFontSubsetEmbedder(font, fontData) {
var _this = _super.call(this, font, fontData) || this;
_this.subset = _this.font.createSubset();
_this.glyphs = [];
_this.glyphCache = utils_1.Cache.populatedBy(function () { return _this.glyphs; });
_this.glyphIdMap = new Map();
return _this;
}
CustomFontSubsetEmbedder.for = function (fontkit, fontData) {
return tslib_1.__awaiter(this, void 0, void 0, function () {
var font;
return tslib_1.__generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, fontkit.create(fontData)];
case 1:
font = _a.sent();
return [2 /*return*/, new CustomFontSubsetEmbedder(font, fontData)];
}
});
});
};
CustomFontSubsetEmbedder.prototype.encodeText = function (text) {
var glyphs = this.font.layout(text).glyphs;
var hexCodes = new Array(glyphs.length);
for (var idx = 0, len = glyphs.length; idx < len; idx++) {
var glyph = glyphs[idx];
var subsetGlyphId = this.subset.includeGlyph(glyph);
this.glyphs[subsetGlyphId - 1] = glyph;
this.glyphIdMap.set(glyph.id, subsetGlyphId);
hexCodes[idx] = utils_1.toHexStringOfMinLength(subsetGlyphId, 4);
}
this.glyphCache.invalidate();
return PDFHexString_1.default.of(hexCodes.join(''));
};
CustomFontSubsetEmbedder.prototype.isCFF = function () {
return this.subset.cff;
};
CustomFontSubsetEmbedder.prototype.glyphId = function (glyph) {
return glyph ? this.glyphIdMap.get(glyph.id) : -1;
};
CustomFontSubsetEmbedder.prototype.serializeFont = function () {
var _this = this;
return new Promise(function (resolve, reject) {
var parts = [];
_this.subset
.encodeStream()
.on('data', function (bytes) { return parts.push(bytes); })
.on('end', function () { return resolve(utils_1.mergeUint8Arrays(parts)); })
.on('error', function (err) { return reject(err); });
});
};
return CustomFontSubsetEmbedder;
}(CustomFontEmbedder_1.default));
exports.default = CustomFontSubsetEmbedder;
//# sourceMappingURL=CustomFontSubsetEmbedder.js.map