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Fontinfo tool (first steps)
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Jakub Melka
335
PdfTool/pdftoolinfofonts.cpp
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335
PdfTool/pdftoolinfofonts.cpp
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// Copyright (C) 2020 Jakub Melka
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//
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// This file is part of PdfForQt.
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//
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// PdfForQt is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// PdfForQt is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with PDFForQt. If not, see <https://www.gnu.org/licenses/>.
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#include "pdftoolinfofonts.h"
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#include "pdfexecutionpolicy.h"
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#include "pdfdocument.h"
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#include "pdffont.h"
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#include "pdfutils.h"
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namespace pdftool
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{
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static PDFToolInfoFonts s_infoFontsApplication;
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QString PDFToolInfoFonts::getStandardString(StandardString standardString) const
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{
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switch (standardString)
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{
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case Command:
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return "info-fonts";
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case Name:
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return PDFToolTranslationContext::tr("Info about used fonts");
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case Description:
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return PDFToolTranslationContext::tr("Retrieve informations about font usage in a document.");
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default:
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Q_ASSERT(false);
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break;
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}
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return QString();
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}
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struct FontInfo
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{
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pdf::PDFClosedIntervalSet pages;
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QString fontName;
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QString fontTypeName;
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QString encoding;
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bool isEmbedded = false;
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bool isSubset = false;
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bool isToUnicodePresent = false;
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pdf::PDFObjectReference reference;
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};
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int PDFToolInfoFonts::execute(const PDFToolOptions& options)
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{
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pdf::PDFDocument document;
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QByteArray sourceData;
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if (!readDocument(options, document, &sourceData))
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{
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return ErrorDocumentReading;
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}
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QString parseError;
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std::vector<pdf::PDFInteger> pages = options.getPageRange(document.getCatalog()->getPageCount(), parseError, true);
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if (!parseError.isEmpty())
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{
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PDFConsole::writeError(parseError, options.outputCodec);
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return ErrorInvalidArguments;
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}
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QMutex mutex;
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std::map<pdf::PDFObjectReference, FontInfo> fontInfoMap;
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std::vector<FontInfo> directFonts;
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std::set<pdf::PDFObjectReference> usedFontReferences;
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auto processPage = [&](pdf::PDFInteger pageIndex)
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{
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try
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{
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const pdf::PDFPage* page = document.getCatalog()->getPage(pageIndex);
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if (const pdf::PDFDictionary* resourcesDictionary = document.getDictionaryFromObject(page->getResources()))
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{
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if (const pdf::PDFDictionary* fontsDictionary = document.getDictionaryFromObject(resourcesDictionary->get("Font")))
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{
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// Iterate trough each font
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const size_t fontsCount = fontsDictionary->getCount();
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for (size_t i = 0; i < fontsCount; ++i)
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{
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pdf::PDFObjectReference fontReference;
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pdf::PDFObject object = fontsDictionary->getValue(i);
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if (object.isReference())
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{
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// Check, if we have not processed the object. If we have it processed,
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// then do nothing, otherwise insert it into the processed objects.
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// We must also use mutex, because we use multithreading.
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QMutexLocker lock(&mutex);
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if (usedFontReferences.count(object.getReference()))
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{
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fontInfoMap[object.getReference()].pages.addValue(pageIndex + 1);
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continue;
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}
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else
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{
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fontReference = object.getReference();
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usedFontReferences.insert(fontReference);
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}
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}
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try
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{
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if (pdf::PDFFontPointer font = pdf::PDFFont::createFont(object, &document))
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{
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pdf::PDFRenderErrorReporterDummy dummyReporter;
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pdf::PDFRealizedFontPointer realizedFont = pdf::PDFRealizedFont::createRealizedFont(font, 8.0, &dummyReporter);
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if (realizedFont)
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{
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const pdf::FontType fontType = font->getFontType();
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const pdf::FontDescriptor* fontDescriptor = font->getFontDescriptor();
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QString fontName = fontDescriptor->fontName;
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int plusPos = fontName.lastIndexOf('+');
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// Jakub Melka: Detect, if font is subset. Font subsets have special form,
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// according to chapter 9.9.2 of PDF 2.0 specification. The first 6 letters
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// of font name are uppercase alphabet letters, and 7'th character is '+' sign.
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bool isSubset = false;
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if (plusPos == 6)
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{
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isSubset = true;
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for (int i = 0; i < 6; ++i)
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{
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QChar character = fontName[i];
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if (!character.isLetter() || !character.isUpper())
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{
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isSubset = false;
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break;
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}
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}
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}
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// Try to remove characters from +, if we have font name 'SDFDSF+ValidFontName'
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if (plusPos != -1 && plusPos < fontName.size() - 1)
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{
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fontName = fontName.mid(plusPos + 1);
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}
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if (fontName.isEmpty())
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{
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fontName = QString::fromLatin1(fontsDictionary->getKey(i).getString());
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}
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QString fontTypeName;
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switch (fontType)
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{
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case pdf::FontType::Type0:
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fontTypeName = PDFToolTranslationContext::tr("Type 0 (CID)");
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break;
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case pdf::FontType::Type1:
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fontTypeName = PDFToolTranslationContext::tr("Type 1 (8 bit)");
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break;
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case pdf::FontType::MMType1:
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fontTypeName = PDFToolTranslationContext::tr("MM Type 1 (8 bit)");
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break;
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case pdf::FontType::TrueType:
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fontTypeName = PDFToolTranslationContext::tr("TrueType (8 bit)");
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break;
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case pdf::FontType::Type3:
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fontTypeName = PDFToolTranslationContext::tr("Type 3");
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break;
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default:
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Q_ASSERT(false);
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break;
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}
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const pdf::PDFFontCMap* toUnicode = font->getToUnicode();
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FontInfo info;
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info.fontName = fontName;
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info.pages.addValue(pageIndex + 1);
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info.fontTypeName = fontTypeName;
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info.isEmbedded = fontDescriptor->isEmbedded();
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info.isSubset = isSubset;
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info.isToUnicodePresent = toUnicode && toUnicode->isValid();
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info.reference = fontReference;
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const pdf::PDFSimpleFont* simpleFont = dynamic_cast<const pdf::PDFSimpleFont*>(font.data());
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if (simpleFont)
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{
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const pdf::PDFEncoding::Encoding encoding = simpleFont->getEncodingType();
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switch (encoding)
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{
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case pdf::PDFEncoding::Encoding::Standard:
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info.encoding = PDFToolTranslationContext::tr("Standard");
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break;
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case pdf::PDFEncoding::Encoding::MacRoman:
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info.encoding = PDFToolTranslationContext::tr("MacRoman");
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break;
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case pdf::PDFEncoding::Encoding::WinAnsi:
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info.encoding = PDFToolTranslationContext::tr("WinAnsi");
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break;
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case pdf::PDFEncoding::Encoding::PDFDoc:
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info.encoding = PDFToolTranslationContext::tr("PDFDoc");
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break;
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case pdf::PDFEncoding::Encoding::MacExpert:
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info.encoding = PDFToolTranslationContext::tr("MacExpert");
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break;
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case pdf::PDFEncoding::Encoding::Symbol:
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info.encoding = PDFToolTranslationContext::tr("Symbol");
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break;
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case pdf::PDFEncoding::Encoding::ZapfDingbats:
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info.encoding = PDFToolTranslationContext::tr("ZapfDingbats");
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break;
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default:
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info.encoding = PDFToolTranslationContext::tr("Custom");
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break;
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}
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}
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QMutexLocker lock(&mutex);
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if (fontReference.isValid())
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{
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info.pages.merge(fontInfoMap[fontReference].pages);
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fontInfoMap[fontReference] = qMove(info);
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}
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else
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{
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directFonts.emplace_back(qMove(info));
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}
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}
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}
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}
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catch (pdf::PDFException)
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{
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// Do nothing, some error occured, continue with next font
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continue;
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}
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}
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}
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}
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}
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catch (pdf::PDFException)
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{
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// Do nothing, some error occured
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}
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};
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pdf::PDFExecutionPolicy::execute(pdf::PDFExecutionPolicy::Scope::Page, pages.begin(), pages.end(), processPage);
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for (auto& item : fontInfoMap)
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{
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directFonts.emplace_back(qMove(item.second));
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}
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PDFOutputFormatter formatter(options.outputStyle, options.outputCodec);
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formatter.beginDocument("info-fonts", PDFToolTranslationContext::tr("Fonts used in document %1").arg(options.document));
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formatter.endl();
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formatter.beginTable("fonts-overview", PDFToolTranslationContext::tr("Overview"));
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formatter.beginTableHeaderRow("header");
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formatter.writeTableHeaderColumn("no", PDFToolTranslationContext::tr("No."), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("font-name", PDFToolTranslationContext::tr("Font Name"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("font-type", PDFToolTranslationContext::tr("Font Type"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("encoding", PDFToolTranslationContext::tr("Encoding"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("pages", PDFToolTranslationContext::tr("Pages"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("is-embedded", PDFToolTranslationContext::tr("Embedded"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("is-subset", PDFToolTranslationContext::tr("Subset"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("is-unicode", PDFToolTranslationContext::tr("Unicode"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("object-no", PDFToolTranslationContext::tr("Object"), Qt::AlignLeft);
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formatter.writeTableHeaderColumn("generation-no", PDFToolTranslationContext::tr("Gen."), Qt::AlignLeft);
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formatter.endTableHeaderRow();
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QLocale locale;
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QString yesText = PDFToolTranslationContext::tr("Yes");
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QString noText = PDFToolTranslationContext::tr("No");
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QString noRef = PDFToolTranslationContext::tr("--");
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int ref = 1;
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for (const FontInfo& info : directFonts)
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{
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formatter.beginTableRow("font", ref);
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formatter.writeTableColumn("no", locale.toString(ref), Qt::AlignRight);
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formatter.writeTableColumn("font-name", info.fontName);
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formatter.writeTableColumn("font-type", info.fontTypeName);
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formatter.writeTableColumn("encoding", info.encoding);
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formatter.writeTableColumn("pages", info.pages.toText(true));
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formatter.writeTableColumn("is-embedded", info.isEmbedded ? yesText : noText);
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formatter.writeTableColumn("is-subset", info.isSubset ? yesText : noText);
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formatter.writeTableColumn("is-unicode", info.isToUnicodePresent ? yesText : noText);
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if (info.reference.isValid())
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{
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formatter.writeTableColumn("object-no", locale.toString(info.reference.objectNumber), Qt::AlignRight);
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formatter.writeTableColumn("generation-no", locale.toString(info.reference.generation), Qt::AlignRight);
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}
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else
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{
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formatter.writeTableColumn("object-no", noRef, Qt::AlignRight);
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formatter.writeTableColumn("generation-no", noRef, Qt::AlignRight);
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}
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formatter.endTableRow();
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++ref;
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}
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formatter.endTable();
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formatter.endDocument();
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PDFConsole::writeText(formatter.getString(), options.outputCodec);
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return ExitSuccess;
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}
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PDFToolAbstractApplication::Options PDFToolInfoFonts::getOptionsFlags() const
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{
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return ConsoleFormat | OpenDocument | PageSelector;
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}
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} // namespace pdftool
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