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Merge pull request #17120 from timvandermeij/code-scanning-alerts

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Remove obsolete `src/shared/{cffStandardStrings,fonts_utils}.js` files
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Tim van der Meij 2023-10-14 14:26:35 +02:00 committed by GitHub
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1
gulpfile.mjs
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@ -1585,7 +1585,6 @@ function buildLib(defines, dir) {
gulp.src( gulp.src(
[ [
"src/{core,display,shared}/**/*.js", "src/{core,display,shared}/**/*.js",
"!src/shared/{cffStandardStrings,fonts_utils}.js",
"src/{pdf,pdf.image_decoders,pdf.worker}.js", "src/{pdf,pdf.image_decoders,pdf.worker}.js",
], ],
{ base: "src/" } { base: "src/" }

311
src/shared/cffStandardStrings.js
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@ -1,311 +0,0 @@
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
var CFFEncodingMap = {
'0': '-reserved-',
'1': 'hstem',
'2': '-reserved-',
'3': 'vstem',
'4': 'vmoveto',
'5': 'rlineto',
'6': 'hlineto',
'7': 'vlineto',
'8': 'rrcurveto',
'9': '-reserved-',
'10': 'callsubr',
'11': 'return',
'12': {
'3': 'and',
'4': 'or',
'5': 'not',
'9': 'abs',
'10': 'add',
'11': 'div',
'12': 'sub',
'14': 'neg',
'15': 'eq',
'18': 'drop',
'20': 'put',
'21': 'get',
'22': 'ifelse',
'23': 'random',
'24': 'mul',
'26': 'sqrt',
'27': 'dup',
'28': 'exch',
'29': 'index',
'30': 'roll',
'34': 'hflex',
'35': 'flex',
'36': 'hflex1',
'37': 'flex1'
},
'13': '-reserved-',
'14': 'endchar',
'15': '-reserved-',
'16': '-reserved-',
'17': '-reserved-',
'18': 'hstemhm',
'19': 'hintmask',
'20': 'cntrmask',
'21': 'rmoveto',
'22': 'hmoveto',
'23': 'vstemhm',
'24': 'rcurveline',
'25': 'rlivecurve',
'26': 'vvcurveto',
'27': 'hhcurveto',
'29': 'callgsubr',
'30': 'vhcurveto',
'31': 'hvcurveto'
};
var CFFDictDataMap = {
'0': {
name: 'version',
operand: 'SID'
},
'1': {
name: 'Notice',
operand: 'SID'
},
'2': {
name: 'FullName',
operand: 'SID'
},
'3': {
name: 'FamilyName',
operand: 'SID'
},
'4': {
name: 'Weight',
operand: 'SID'
},
'5': {
name: 'FontBBox',
operand: [0, 0, 0, 0]
},
'6': {
name: 'BlueValues'
},
'7': {
name: 'OtherBlues'
},
'8': {
name: 'FamilyBlues'
},
'9': {
name: 'FamilyOtherBlues'
},
'10': {
name: 'StdHW'
},
'11': {
name: 'StdVW'
},
'12': {
'0': {
name: 'Copyright',
operand: 'SID'
},
'1': {
name: 'IsFixedPitch',
operand: false
},
'2': {
name: 'ItalicAngle',
operand: 0
},
'3': {
name: 'UnderlinePosition',
operand: -100
},
'4': {
name: 'UnderlineThickness',
operand: 50
},
'5': {
name: 'PaintType',
operand: 0
},
'6': {
name: 'CharstringType',
operand: 2
},
'7': {
name: 'FontMatrix',
operand: [0.001, 0, 0, 0.001, 0, 0]
},
'8': {
name: 'StrokeWidth',
operand: 0
},
'9': {
name: 'BlueScale'
},
'10': {
name: 'BlueShift'
},
'11': {
name: 'BlueFuzz'
},
'12': {
name: 'StemSnapH'
},
'13': {
name: 'StemSnapV'
},
'14': {
name: 'ForceBold'
},
'17': {
name: 'LanguageGroup'
},
'18': {
name: 'ExpansionFactor'
},
'19': {
name: 'initialRandomSeed'
},
'20': {
name: 'SyntheticBase',
operand: null
},
'21': {
name: 'PostScript',
operand: 'SID'
},
'22': {
name: 'BaseFontName',
operand: 'SID'
},
'23': {
name: 'BaseFontBlend',
operand: 'delta'
}
},
'13': {
name: 'UniqueID',
operand: null
},
'14': {
name: 'XUID',
operand: []
},
'15': {
name: 'charset',
operand: 0
},
'16': {
name: 'Encoding',
operand: 0
},
'17': {
name: 'CharStrings',
operand: null
},
'18': {
name: 'Private',
operand: 'number number'
},
'19': {
name: 'Subrs'
},
'20': {
name: 'defaultWidthX'
},
'21': {
name: 'nominalWidthX'
}
};
var CFFDictPrivateDataMap = {
'6': {
name: 'BluesValues',
operand: 'delta'
},
'7': {
name: 'OtherBlues',
operand: 'delta'
},
'8': {
name: 'FamilyBlues',
operand: 'delta'
},
'9': {
name: 'FamilyOtherBlues',
operand: 'delta'
},
'10': {
name: 'StdHW',
operand: null
},
'11': {
name: 'StdVW',
operand: null
},
'12': {
'9': {
name: 'BlueScale',
operand: 0.039625
},
'10': {
name: 'BlueShift',
operand: 7
},
'11': {
name: 'BlueFuzz',
operand: 1
},
'12': {
name: 'StemSnapH',
operand: 'delta'
},
'13': {
name: 'StemSnapV',
operand: 'delta'
},
'14': {
name: 'ForceBold',
operand: 'boolean'
},
'17': {
name: 'LanguageGroup',
operand: 0
},
'18': {
name: 'ExpansionFactor',
operand: 0.06
},
'19': {
name: 'initialRandomSeed',
operand: 0
}
},
'19': {
name: 'Subrs',
operand: null
},
'20': {
name: 'defaultWidthX',
operand: 0
},
'21': {
name: 'nominalWidthX',
operand: 0
}
};

429
src/shared/fonts_utils.js
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@ -1,429 +0,0 @@
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals CFFDictDataMap, CFFDictPrivateDataMap, CFFEncodingMap, CFFStrings,
Components, Dict, dump, FormatError, netscape, Stream */
'use strict';
/*
* The Type2 reader code below is only used for debugging purpose since Type2
* is only a CharString format and is never used directly as a Font file.
*
* So the code here is useful for dumping the data content of a .cff file in
* order to investigate the similarity between a Type1 CharString and a Type2
* CharString or to understand the structure of the CFF format.
*/
/*
* Build a charset by assigning the glyph name and the human readable form
* of the glyph data.
*/
function readCharset(aStream, aCharstrings) {
var charset = {};
var format = aStream.getByte();
var count = aCharstrings.length - 1;
var i, sid;
if (format === 0) {
charset['.notdef'] = readCharstringEncoding(aCharstrings[0]);
for (i = 1; i < count + 1; i++) {
sid = aStream.getByte() << 8 | aStream.getByte();
charset[CFFStrings[sid]] = readCharstringEncoding(aCharstrings[i]);
}
} else if (format === 1) {
for (i = 1; i < count + 1; i++) {
var first = aStream.getByte();
first = (first << 8) | aStream.getByte();
var numLeft = aStream.getByte();
for (var j = 0; j <= numLeft; j++) {
sid = first++;
charset[CFFStrings[sid]] = readCharstringEncoding(aCharstrings[j]);
}
}
} else {
throw new FormatError('Invalid charset format');
}
return charset;
}
/*
* Take a Type2 binary charstring as input and transform it to a human
* readable representation as specified by the 'The Type 2 Charstring Format',
* chapter 3.1.
*/
function readCharstringEncoding(aString) {
if (!aString) {
return '';
}
var charstringTokens = [];
var count = aString.length;
for (var i = 0; i < count; ) {
var value = aString[i++] | 0;
var token = null;
if (value < 0) {
continue;
} else if (value <= 11) {
token = CFFEncodingMap[value];
} else if (value === 12) {
token = CFFEncodingMap[value][aString[i++]];
} else if (value <= 18) {
token = CFFEncodingMap[value];
} else if (value <= 20) {
++i; // var mask = aString[i++];
token = CFFEncodingMap[value];
} else if (value <= 27) {
token = CFFEncodingMap[value];
} else if (value === 28) {
token = aString[i++] << 8 | aString[i++];
} else if (value <= 31) {
token = CFFEncodingMap[value];
} else if (value < 247) {
token = parseInt(value, 10) - 139;
} else if (value < 251) {
token = (value - 247) * 256 + aString[i++] + 108;
} else if (value < 255) {
token = -(value - 251) * 256 - aString[i++] - 108;
} else { // value === 255
token = aString[i++] << 24 | aString[i++] << 16 |
aString[i++] << 8 | aString[i];
}
charstringTokens.push(token);
}
return charstringTokens;
}
/*
* Take a binary DICT Data as input and transform it into a human readable
* form as specified by 'The Compact Font Format Specification', chapter 5.
*/
function readFontDictData(aString, aMap) {
var fontDictDataTokens = [];
var count = aString.length;
for (var i = 0; i < count; ) {
var value = aString[i++] | 0;
var token = null;
if (value === 12) {
token = aMap[value][aString[i++]];
} else if (value === 28) {
token = aString[i++] << 8 | aString[i++];
} else if (value === 29) {
token = aString[i++] << 24 |
aString[i++] << 16 |
aString[i++] << 8 |
aString[i++];
} else if (value === 30) {
token = '';
var parsed = false;
while (!parsed) {
var octet = aString[i++];
var nibbles = [parseInt(octet / 16, 10), parseInt(octet % 16, 10)];
for (var j = 0; j < nibbles.length; j++) {
var nibble = nibbles[j];
switch (nibble) {
case 0xA:
token += '.';
break;
case 0xB:
token += 'E';
break;
case 0xC:
token += 'E-';
break;
case 0xD:
break;
case 0xE:
token += '-';
break;
case 0xF:
parsed = true;
break;
default:
token += nibble;
break;
}
}
}
token = parseFloat(token);
} else if (value <= 31) {
token = aMap[value];
} else if (value <= 246) {
token = parseInt(value, 10) - 139;
} else if (value <= 250) {
token = (value - 247) * 256 + aString[i++] + 108;
} else if (value <= 254) {
token = -(value - 251) * 256 - aString[i++] - 108;
} else if (value === 255) {
throw new FormatError('255 is not a valid DICT command');
}
fontDictDataTokens.push(token);
}
return fontDictDataTokens;
}
/*
* Take a stream as input and return an array of objects.
* In CFF an INDEX is a structure with the following format:
* {
* count: 2 bytes (Number of objects stored in INDEX),
* offsize: 1 byte (Offset array element size),
* offset: [count + 1] bytes (Offsets array),
* data: - (Objects data)
* }
*
* More explanation are given in the 'CFF Font Format Specification',
* chapter 5.
*/
function readFontIndexData(aStream, aIsByte) {
var count = aStream.getByte() << 8 | aStream.getByte();
var offsize = aStream.getByte();
function getNextOffset() {
switch (offsize) {
case 0:
return 0;
case 1:
return aStream.getByte();
case 2:
return aStream.getByte() << 8 | aStream.getByte();
case 3:
return aStream.getByte() << 16 | aStream.getByte() << 8 |
aStream.getByte();
case 4:
return aStream.getByte() << 24 | aStream.getByte() << 16 |
aStream.getByte() << 8 | aStream.getByte();
}
throw new FormatError(offsize + ' is not a valid offset size');
}
var offsets = [];
var i;
for (i = 0; i < count + 1; i++) {
offsets.push(getNextOffset());
}
dump('Found ' + count + ' objects at offsets :' +
offsets + ' (offsize: ' + offsize + ')');
// Now extract the objects
var relativeOffset = aStream.pos;
var objects = [];
for (i = 0; i < count; i++) {
var offset = offsets[i];
aStream.pos = relativeOffset + offset - 1;
var data = [];
var length = offsets[i + 1] - 1;
for (var j = offset - 1; j < length; j++) {
data.push(aIsByte ? aStream.getByte() : aStream.getChar());
}
objects.push(data);
}
return objects;
}
var Type2Parser = function type2Parser(aFilePath) {
var font = new Dict(null);
var xhr = new XMLHttpRequest();
xhr.open('GET', aFilePath, false);
xhr.responseType = 'arraybuffer';
xhr.expected = document.URL.startsWith('file:') ? 0 : 200;
xhr.send(null);
this.data = new Stream(xhr.response);
// Turn on this flag for additional debugging logs
var debug = false;
function dump(aStr) {
if (debug) {
console.log(aStr);
}
}
function parseAsToken(aString, aMap) {
var decoded = readFontDictData(aString, aMap);
var stack = [];
var count = decoded.length;
for (var i = 0; i < count; i++) {
var token = decoded[i];
if (typeof token === "number") {
stack.push(token);
} else {
switch (token.operand) {
case 'SID':
font.set(token.name, CFFStrings[stack.pop()]);
break;
case 'number number':
font.set(token.name, {
offset: stack.pop(),
size: stack.pop()
});
break;
case 'boolean':
font.set(token.name, stack.pop());
break;
case 'delta':
font.set(token.name, stack.pop());
break;
default:
if (token.operand?.length) {
var array = [];
for (var j = 0; j < token.operand.length; j++) {
array.push(stack.pop());
}
font.set(token.name, array);
} else {
font.set(token.name, stack.pop());
}
break;
}
}
}
}
this.parse = function type2ParserParse(aStream) {
font.set('major', aStream.getByte());
font.set('minor', aStream.getByte());
font.set('hdrSize', aStream.getByte());
font.set('offsize', aStream.getByte());
// Read the NAME Index
dump('Reading Index: Names');
font.set('Names', readFontIndexData(aStream));
dump('Names: ' + font.get('Names'));
// Read the Top Dict Index
dump('Reading Index: TopDict');
var topDict = readFontIndexData(aStream, true);
dump('TopDict: ' + topDict);
// Read the String Index
dump('Reading Index: Strings');
var strings = readFontIndexData(aStream);
dump('strings: ' + strings);
// Fill up the Strings dictionary with the new unique strings
var i;
for (i = 0; i < strings.length; i++) {
CFFStrings.push(strings[i].join(''));
}
// Parse the TopDict operator
var count = topDict.length;
for (i = 0; i < count; i++) {
parseAsToken(topDict[i], CFFDictDataMap);
}
// Read the Global Subr Index that comes just after the Strings Index
// (cf. "The Compact Font Format Specification" Chapter 16)
dump('Reading Global Subr Index');
var subrs = readFontIndexData(aStream, true);
dump(subrs);
// Reading Private Dict
var priv = font.get('Private');
dump('Reading Private Dict (offset: ' + priv.offset +
' size: ' + priv.size + ')');
aStream.pos = priv.offset;
var privateDict = [];
for (i = 0; i < priv.size; i++) {
privateDict.push(aStream.getByte());
}
dump('privateData:' + privateDict);
parseAsToken(privateDict, CFFDictPrivateDataMap);
font.forEach(function(key, value) {
dump(key + '::' + value);
});
// Read CharStrings Index
var charStringsOffset = font.get('CharStrings');
dump('Read CharStrings Index (offset: ' + charStringsOffset + ')');
aStream.pos = charStringsOffset;
var charStrings = readFontIndexData(aStream, true);
// Read Charset
dump('Read Charset for ' + charStrings.length + ' glyphs');
var charsetEntry = font.get('charset');
if (charsetEntry === 0) {
throw new FormatError('Need to support CFFISOAdobeCharset');
} else if (charsetEntry === 1) {
throw new FormatError('Need to support CFFExpert');
} else if (charsetEntry === 2) {
throw new FormatError('Need to support CFFExpertSubsetCharset');
} else {
aStream.pos = charsetEntry;
readCharset(aStream, charStrings);
}
};
};
/*
* To try the Type2 decoder on a local file in the current directory:
*
* var cff = new Type2Parser("file.cff");
* cff.parse(this.data);
*
* To try the Type2 decoder on a custom built CFF array:
*
* var file = new Uint8Array(cffFileArray, 0, cffFileSize);
* var parser = new Type2Parser();
* parser.parse(new Stream(file));
*/
/*
* Write to a file to the disk (works only on Firefox in privilege mode)
* but this is useful for dumping a font file to the disk and check with
* fontforge or the ots program what's wrong with the file.
*
* writeToFile(fontData, "/tmp/pdf.js." + fontCount + ".cff");
*/
function writeToFile(aBytes, aFilePath) {
if (!('netscape' in window)) {
return;
}
netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
var Cc = Components.classes,
Ci = Components.interfaces;
var file = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsILocalFile);
file.initWithPath(aFilePath);
var stream = Cc['@mozilla.org/network/file-output-stream;1']
.createInstance(Ci.nsIFileOutputStream);
stream.init(file, 0x04 | 0x08 | 0x20, 0x180, 0);
var bos = Cc['@mozilla.org/binaryoutputstream;1']
.createInstance(Ci.nsIBinaryOutputStream);
bos.setOutputStream(stream);
bos.writeByteArray(aBytes, aBytes.length);
stream.close();
}