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Char code to unicode conversion

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This commit is contained in:
notmasteryet 2011-12-11 17:59:19 -06:00
parent 3b72c6063c
commit 94cc2cdb75
2 changed files with 60 additions and 18 deletions
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4
src/evaluator.js
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@ -505,11 +505,11 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
var items = args[0];
for (var j = 0, jj = items.length; j < jj; j++) {
if (typeof items[j] === 'string')
text += items[j];
text += fontCharsToUnicode(items[j], font.translated.properties);
}
break;
case 'Tj':
text += args[0];
text += fontCharsToUnicode(args[0], font.translated.properties);;
break;
} // switch

74
src/fonts.js
View File

@ -723,6 +723,48 @@ function isSpecialUnicode(unicode) {
unicode < kCmapGlyphOffset + kSizeOfGlyphArea);
}
function fontCharsToUnicode(charCodes, fontProperties) {
var toUnicode = fontProperties.toUnicode;
var composite = fontProperties.composite;
var encoding, differences, cidToUnicode;
var result = '';
if (composite) {
cidToUnicode = fontProperties.cidToUnicode
for (var i = 0, ii = charCodes.length; i < ii; i += 2) {
var charCode = (charCodes.charCodeAt(i) << 8) | charCodes.charCodeAt(i + 1);
if (toUnicode && charCode in toUnicode) {
var unicode = toUnicode[charCode];
result += typeof unicode !== 'number' ? unicode :
String.fromCharCode(unicode);
continue;
}
result += String.fromCharCode(!cidToUnicode ? charCode :
cidToUnicode[charCode] || charCode)
}
} else {
differences = fontProperties.differences;
encoding = fontProperties.baseEncoding;
for (var i = 0, ii = charCodes.length; i < ii; i++) {
var charCode = charCodes.charCodeAt(i);
if (toUnicode && charCode in toUnicode) {
var unicode = toUnicode[charCode];
result += typeof unicode !== 'number' ? unicode :
String.fromCharCode(unicode);
continue;
}
var glyphName = charCode in differences ? differences[charCode] :
encoding[charCode];
if (glyphName in GlyphsUnicode) {
result += String.fromCharCode(GlyphsUnicode[glyphName]);
continue;
}
result += String.fromCharCode(charCode)
}
}
return result;
}
/**
* 'Font' is the class the outside world should use, it encapsulate all the font
* decoding logics whatever type it is (assuming the font type is supported).
@ -2098,7 +2140,7 @@ var Font = (function FontClosure() {
},
charToGlyph: function fonts_charToGlyph(charcode) {
var unicode, width, codeIRQueue;
var fontChar, width, codeIRQueue;
var width = this.widths[charcode];
@ -2106,38 +2148,38 @@ var Font = (function FontClosure() {
case 'CIDFontType0':
if (this.noUnicodeAdaptation) {
width = this.widths[this.unicodeToCID[charcode] || charcode];
unicode = charcode;
fontChar = charcode;
break;
}
unicode = this.toUnicode[charcode] || charcode;
fontChar = this.toUnicode[charcode] || charcode;
break;
case 'CIDFontType2':
if (this.noUnicodeAdaptation) {
width = this.widths[this.unicodeToCID[charcode] || charcode];
unicode = charcode;
fontChar = charcode;
break;
}
unicode = this.toUnicode[charcode] || charcode;
fontChar = this.toUnicode[charcode] || charcode;
break;
case 'Type1':
var glyphName = this.differences[charcode] || this.encoding[charcode];
if (!isNum(width))
width = this.widths[glyphName];
if (this.noUnicodeAdaptation) {
unicode = GlyphsUnicode[glyphName] || charcode;
fontChar = GlyphsUnicode[glyphName] || charcode;
break;
}
unicode = this.glyphNameMap[glyphName] ||
fontChar = this.glyphNameMap[glyphName] ||
GlyphsUnicode[glyphName] || charcode;
break;
case 'Type3':
var glyphName = this.differences[charcode] || this.encoding[charcode];
codeIRQueue = this.charProcIRQueues[glyphName];
unicode = charcode;
fontChar = charcode;
break;
case 'TrueType':
if (this.useToUnicode) {
unicode = this.toUnicode[charcode] || charcode;
fontChar = this.toUnicode[charcode] || charcode;
break;
}
var glyphName = this.differences[charcode] || this.encoding[charcode];
@ -2146,19 +2188,19 @@ var Font = (function FontClosure() {
if (!isNum(width))
width = this.widths[glyphName];
if (this.noUnicodeAdaptation) {
unicode = GlyphsUnicode[glyphName] || charcode;
fontChar = GlyphsUnicode[glyphName] || charcode;
break;
}
if (!this.hasEncoding) {
unicode = this.useToUnicode ? this.toUnicode[charcode] : charcode;
fontChar = this.useToUnicode ? this.toUnicode[charcode] : charcode;
break;
}
if (this.hasShortCmap && false) {
var j = Encodings.MacRomanEncoding.indexOf(glyphName);
unicode = j >= 0 ? j :
fontChar = j >= 0 ? j :
this.glyphNameMap[glyphName];
} else {
unicode = glyphName in GlyphsUnicode ?
fontChar = glyphName in GlyphsUnicode ?
GlyphsUnicode[glyphName] :
this.glyphNameMap[glyphName];
}
@ -2168,15 +2210,15 @@ var Font = (function FontClosure() {
break;
}
var unicodeChars = !('toUnicode' in this) ? charcode :
this.toUnicode[charcode] || charcode;
var unicodeChars = !('toUnicode' in this) ? fontChar :
this.toUnicode[charcode] || fontChar;
if (typeof unicodeChars === 'number')
unicodeChars = String.fromCharCode(unicodeChars);
width = (isNum(width) ? width : this.defaultWidth) * this.widthMultiplier;
return {
fontChar: String.fromCharCode(unicode),
fontChar: String.fromCharCode(fontChar),
unicode: unicodeChars,
width: width,
codeIRQueue: codeIRQueue