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Merge pull request bpampuch#221 from TW-QEN/qen-fixToManyCharacterIssue
Embed fonts multiple times to allow more than 92 characters.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| /* jslint node: true */ | ||
| 'use strict'; | ||
|
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| var _ = require('lodash'); | ||
| var FontWrapper = require('./fontWrapper'); | ||
|
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| function typeName(bold, italics){ | ||
| var type = 'normal'; | ||
| if (bold && italics) type = 'bolditalics'; | ||
| else if (bold) type = 'bold'; | ||
| else if (italics) type = 'italics'; | ||
| return type; | ||
| } | ||
|
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| function FontProvider(fontDescriptors, pdfDoc) { | ||
| this.fonts = {}; | ||
| this.pdfDoc = pdfDoc; | ||
| this.fontWrappers = {}; | ||
|
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| for(var font in fontDescriptors) { | ||
| if (fontDescriptors.hasOwnProperty(font)) { | ||
| var fontDef = fontDescriptors[font]; | ||
|
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| this.fonts[font] = { | ||
| normal: fontDef.normal, | ||
| bold: fontDef.bold, | ||
| italics: fontDef.italics, | ||
| bolditalics: fontDef.bolditalics | ||
| }; | ||
| } | ||
| } | ||
| } | ||
|
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| FontProvider.prototype.provideFont = function(familyName, bold, italics) { | ||
| if (!this.fonts[familyName]) return this.pdfDoc._font; | ||
| var type = typeName(bold, italics); | ||
|
|
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| this.fontWrappers[familyName] = this.fontWrappers[familyName] || {}; | ||
|
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| if (!this.fontWrappers[familyName][type]) { | ||
| this.fontWrappers[familyName][type] = new FontWrapper(this.pdfDoc, this.fonts[familyName][type], familyName + '(' + type + ')'); | ||
| } | ||
|
|
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| return this.fontWrappers[familyName][type]; | ||
| }; | ||
|
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| FontProvider.prototype.setFontRefsToPdfDoc = function(){ | ||
| var self = this; | ||
|
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| _.each(self.fontWrappers, function(fontFamily) { | ||
| _.each(fontFamily, function(fontWrapper){ | ||
| _.each(fontWrapper.pdfFonts, function(font){ | ||
| if (!self.pdfDoc.page.fonts[font.id]) { | ||
| self.pdfDoc.page.fonts[font.id] = font.ref(); | ||
| } | ||
| }); | ||
| }); | ||
| }); | ||
| }; | ||
|
|
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| module.exports = FontProvider; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| /* jslint node: true */ | ||
| 'use strict'; | ||
|
|
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| var _ = require('lodash'); | ||
|
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| function FontWrapper(pdfkitDoc, path, fontName){ | ||
| this.MAX_CHAR_TYPES = 92; | ||
|
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| this.pdfkitDoc = pdfkitDoc; | ||
| this.path = path; | ||
| this.pdfFonts = []; | ||
| this.charCatalogue = []; | ||
| this.name = fontName; | ||
|
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| this.__defineGetter__('ascender', function(){ | ||
| var font = this.getFont(0); | ||
| return font.ascender; | ||
| }); | ||
| this.__defineGetter__('decender', function(){ | ||
| var font = this.getFont(0); | ||
| return font.decender; | ||
| }); | ||
|
|
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| } | ||
| // private | ||
|
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| FontWrapper.prototype.getFont = function(index){ | ||
| if(!this.pdfFonts[index]){ | ||
|
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| var pseudoName = this.name + index; | ||
|
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| if(this.postscriptName){ | ||
| delete this.pdfkitDoc._fontFamilies[this.postscriptName]; | ||
| } | ||
|
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| this.pdfFonts[index] = this.pdfkitDoc.font(this.path, pseudoName)._font; | ||
| if(!this.postscriptName){ | ||
| this.postscriptName = this.pdfFonts[index].name; | ||
| } | ||
| } | ||
|
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| return this.pdfFonts[index]; | ||
| }; | ||
|
|
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| // public | ||
| FontWrapper.prototype.widthOfString = function(){ | ||
| var font = this.getFont(0); | ||
| return font.widthOfString.apply(font, arguments); | ||
| }; | ||
|
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| FontWrapper.prototype.lineHeight = function(){ | ||
| var font = this.getFont(0); | ||
| return font.lineHeight.apply(font, arguments); | ||
| }; | ||
|
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| FontWrapper.prototype.ref = function(){ | ||
| var font = this.getFont(0); | ||
| return font.ref.apply(font, arguments); | ||
| }; | ||
|
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| var toCharCode = function(char){ | ||
| return char.charCodeAt(0); | ||
| }; | ||
|
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| FontWrapper.prototype.encode = function(text){ | ||
| var self = this; | ||
|
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| var charTypesInInline = _.chain(text.split('')).map(toCharCode).uniq().value(); | ||
| if (charTypesInInline.length > self.MAX_CHAR_TYPES) { | ||
| throw new Error('Inline has more than '+ self.MAX_CHAR_TYPES + ': ' + text + ' different character types and therefore cannot be properly embedded into pdf.'); | ||
| } | ||
|
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| var characterFitInFontWithIndex = function (charCatalogue) { | ||
|
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| return _.uniq(charCatalogue.concat(charTypesInInline)).length <= self.MAX_CHAR_TYPES; | ||
| }; | ||
|
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| var index = _.findIndex(self.charCatalogue, characterFitInFontWithIndex); | ||
|
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| if(index < 0){ | ||
| index = self.charCatalogue.length; | ||
| self.charCatalogue[index] = []; | ||
| } | ||
|
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| var font = this.getFont(index); | ||
| font.use(text); | ||
|
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| _.each(charTypesInInline, function(charCode){ | ||
| if(!_.includes(self.charCatalogue[index], charCode)){ | ||
| self.charCatalogue[index].push(charCode); | ||
| } | ||
| }); | ||
|
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| var encodedText = _.map(font.encode(text), function (char) { | ||
| return char.charCodeAt(0).toString(16); | ||
| }).join(''); | ||
|
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| return { | ||
| encodedText: encodedText, | ||
| fontId: font.id | ||
| }; | ||
| }; | ||
|
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|
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| module.exports = FontWrapper; |
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