pdfkit2
Version:
A PDF generation library for Node.js
172 lines (154 loc) • 8.16 kB
JavaScript
(function() {
var AFMFont, fs;
fs = require('fs');
AFMFont = (function() {
var WIN_ANSI_MAP, characters;
AFMFont.open = function(filename) {
return new AFMFont(fs.readFileSync(filename, 'utf8'));
};
function AFMFont(contents) {
var e, i;
this.contents = contents;
this.attributes = {};
this.glyphWidths = {};
this.boundingBoxes = {};
this.kernPairs = {};
this.parse();
this.charWidths = (function() {
var j, results;
results = [];
for (i = j = 0; j <= 255; i = ++j) {
results.push(this.glyphWidths[characters[i]]);
}
return results;
}).call(this);
this.bbox = (function() {
var j, len, ref, results;
ref = this.attributes['FontBBox'].split(/\s+/);
results = [];
for (j = 0, len = ref.length; j < len; j++) {
e = ref[j];
results.push(+e);
}
return results;
}).call(this);
this.ascender = +(this.attributes['Ascender'] || 0);
this.descender = +(this.attributes['Descender'] || 0);
this.xHeight = +(this.attributes['XHeight'] || 0);
this.capHeight = +(this.attributes['CapHeight'] || 0);
this.lineGap = (this.bbox[3] - this.bbox[1]) - (this.ascender - this.descender);
}
AFMFont.prototype.parse = function() {
var a, j, key, len, line, match, name, ref, section, value;
section = '';
ref = this.contents.split('\n');
for (j = 0, len = ref.length; j < len; j++) {
line = ref[j];
if (match = line.match(/^Start(\w+)/)) {
section = match[1];
continue;
} else if (match = line.match(/^End(\w+)/)) {
section = '';
continue;
}
switch (section) {
case 'FontMetrics':
match = line.match(/(^\w+)\s+(.*)/);
key = match[1];
value = match[2];
if (a = this.attributes[key]) {
if (!Array.isArray(a)) {
a = this.attributes[key] = [a];
}
a.push(value);
} else {
this.attributes[key] = value;
}
break;
case 'CharMetrics':
if (!/^CH?\s/.test(line)) {
continue;
}
name = line.match(/\bN\s+(\.?\w+)\s*;/)[1];
this.glyphWidths[name] = +line.match(/\bWX\s+(\d+)\s*;/)[1];
break;
case 'KernPairs':
match = line.match(/^KPX\s+(\.?\w+)\s+(\.?\w+)\s+(-?\d+)/);
if (match) {
this.kernPairs[match[1] + '\0' + match[2]] = parseInt(match[3]);
}
}
}
};
WIN_ANSI_MAP = {
402: 131,
8211: 150,
8212: 151,
8216: 145,
8217: 146,
8218: 130,
8220: 147,
8221: 148,
8222: 132,
8224: 134,
8225: 135,
8226: 149,
8230: 133,
8364: 128,
8240: 137,
8249: 139,
8250: 155,
710: 136,
8482: 153,
338: 140,
339: 156,
732: 152,
352: 138,
353: 154,
376: 159,
381: 142,
382: 158
};
AFMFont.prototype.encodeText = function(text) {
var char, i, j, ref, res;
res = [];
for (i = j = 0, ref = text.length; 0 <= ref ? j < ref : j > ref; i = 0 <= ref ? ++j : --j) {
char = text.charCodeAt(i);
char = WIN_ANSI_MAP[char] || char;
res.push(char.toString(16));
}
return res;
};
AFMFont.prototype.glyphsForString = function(string) {
var charCode, glyphs, i, j, ref;
glyphs = [];
for (i = j = 0, ref = string.length; 0 <= ref ? j < ref : j > ref; i = 0 <= ref ? ++j : --j) {
charCode = string.charCodeAt(i);
glyphs.push(this.characterToGlyph(charCode));
}
return glyphs;
};
AFMFont.prototype.characterToGlyph = function(character) {
return characters[WIN_ANSI_MAP[character] || character] || '.notdef';
};
AFMFont.prototype.widthOfGlyph = function(glyph) {
return this.glyphWidths[glyph] || 0;
};
AFMFont.prototype.getKernPair = function(left, right) {
return this.kernPairs[left + '\0' + right] || 0;
};
AFMFont.prototype.advancesForGlyphs = function(glyphs) {
var advances, index, j, left, len, right;
advances = [];
for (index = j = 0, len = glyphs.length; j < len; index = ++j) {
left = glyphs[index];
right = glyphs[index + 1];
advances.push(this.widthOfGlyph(left) + this.getKernPair(left, right));
}
return advances;
};
characters = '.notdef .notdef .notdef .notdef\n.notdef .notdef .notdef .notdef\n.notdef .notdef .notdef .notdef\n.notdef .notdef .notdef .notdef\n.notdef .notdef .notdef .notdef\n.notdef .notdef .notdef .notdef\n.notdef .notdef .notdef .notdef\n.notdef .notdef .notdef .notdef\n\nspace exclam quotedbl numbersign\ndollar percent ampersand quotesingle\nparenleft parenright asterisk plus\ncomma hyphen period slash\nzero one two three\nfour five six seven\neight nine colon semicolon\nless equal greater question\n\nat A B C\nD E F G\nH I J K\nL M N O\nP Q R S\nT U V W\nX Y Z bracketleft\nbackslash bracketright asciicircum underscore\n\ngrave a b c\nd e f g\nh i j k\nl m n o\np q r s\nt u v w\nx y z braceleft\nbar braceright asciitilde .notdef\n\nEuro .notdef quotesinglbase florin\nquotedblbase ellipsis dagger daggerdbl\ncircumflex perthousand Scaron guilsinglleft\nOE .notdef Zcaron .notdef\n.notdef quoteleft quoteright quotedblleft\nquotedblright bullet endash emdash\ntilde trademark scaron guilsinglright\noe .notdef zcaron ydieresis\n\nspace exclamdown cent sterling\ncurrency yen brokenbar section\ndieresis copyright ordfeminine guillemotleft\nlogicalnot hyphen registered macron\ndegree plusminus twosuperior threesuperior\nacute mu paragraph periodcentered\ncedilla onesuperior ordmasculine guillemotright\nonequarter onehalf threequarters questiondown\n\nAgrave Aacute Acircumflex Atilde\nAdieresis Aring AE Ccedilla\nEgrave Eacute Ecircumflex Edieresis\nIgrave Iacute Icircumflex Idieresis\nEth Ntilde Ograve Oacute\nOcircumflex Otilde Odieresis multiply\nOslash Ugrave Uacute Ucircumflex\nUdieresis Yacute Thorn germandbls\n\nagrave aacute acircumflex atilde\nadieresis aring ae ccedilla\negrave eacute ecircumflex edieresis\nigrave iacute icircumflex idieresis\neth ntilde ograve oacute\nocircumflex otilde odieresis divide\noslash ugrave uacute ucircumflex\nudieresis yacute thorn ydieresis'.split(/\s+/);
return AFMFont;
})();
module.exports = AFMFont;
}).call(this);