poppler/Catalog.h - third_party/poppler - Git at Google

 //========================================================================
 //
 // Catalog.h
 //
 // Copyright 1996-2007 Glyph & Cog, LLC
 //
 //========================================================================

 //========================================================================
 //
 // Modified under the Poppler project - http://poppler.freedesktop.org
 //
 // All changes made under the Poppler project to this file are licensed
 // under GPL version 2 or later
 //
 // Copyright (C) 2005 Kristian Høgsberg <krh@redhat.com>
 // Copyright (C) 2005, 2007, 2009-2011, 2013, 2017-2023 Albert Astals Cid <aacid@kde.org>
 // Copyright (C) 2005 Jonathan Blandford <jrb@redhat.com>
 // Copyright (C) 2005, 2006, 2008 Brad Hards <bradh@frogmouth.net>
 // Copyright (C) 2007 Julien Rebetez <julienr@svn.gnome.org>
 // Copyright (C) 2008, 2011 Pino Toscano <pino@kde.org>
 // Copyright (C) 2010 Hib Eris <hib@hiberis.nl>
 // Copyright (C) 2012 Fabio D'Urso <fabiodurso@hotmail.it>
 // Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
 // Copyright (C) 2013 Adrian Perez de Castro <aperez@igalia.com>
 // Copyright (C) 2013, 2017 Adrian Johnson <ajohnson@redneon.com>
 // Copyright (C) 2013 José Aliste <jaliste@src.gnome.org>
 // Copyright (C) 2016 Masamichi Hosoda <trueroad@trueroad.jp>
 // Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by the LiMux project of the city of Munich
 // Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de>
 // Copyright (C) 2020 Oliver Sander <oliver.sander@tu-dresden.de>
 // Copyright (C) 2020 Katarina Behrens <Katarina.Behrens@cib.de>
 // Copyright (C) 2020 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by Technische Universität Dresden
 // Copyright (C) 2021 RM <rm+git@arcsin.org>
 //
 // To see a description of the changes please see the Changelog file that
 // came with your tarball or type make ChangeLog if you are building from git
 //
 //========================================================================

 #ifndef CATALOG_H
 #define CATALOG_H

 #include "poppler-config.h"
 #include "poppler_private_export.h"
 #include "Object.h"
 #include "Link.h"

 #include <memory>
 #include <optional>
 #include <vector>

 class PDFDoc;
 class XRef;
 class Object;
 class Page;
 class PageAttrs;
 struct Ref;
 class PageLabelInfo;
 class Form;
 class OCGs;
 class ViewerPreferences;
 class FileSpec;
 class StructTreeRoot;

 //------------------------------------------------------------------------
 // NameTree
 //------------------------------------------------------------------------

 class POPPLER_PRIVATE_EXPORT NameTree
 {
 public:
     NameTree();
     ~NameTree();

     NameTree(const NameTree &) = delete;
     NameTree &operator=(const NameTree &) = delete;

     void init(XRef *xref, Object *tree);
     Object lookup(const GooString *name);
     int numEntries() { return length; };
     // iterator accessor, note it returns a pointer to the internal object, do not free nor delete it
     Object *getValue(int i);
     const GooString *getName(int i) const;

 private:
     struct Entry
     {
         Entry(Array *array, int index);
         ~Entry();
         GooString name;
         Object value;
         static int cmpEntry(const void *voidEntry, const void *voidOtherEntry);
         static int cmp(const void *key, const void *entry);
     };

     void parse(const Object *tree, RefRecursionChecker &seen);
     void addEntry(Entry *entry);

     XRef *xref;
     Entry **entries;
     int size, length; // size is the number of entries in
                       // the array of Entry*
                       // length is the number of real Entry
 };

 //------------------------------------------------------------------------
 // Catalog
 //------------------------------------------------------------------------

 class POPPLER_PRIVATE_EXPORT Catalog
 {
 public:
     // Constructor.
     explicit Catalog(PDFDoc *docA);

     // Destructor.
     ~Catalog();

     Catalog(const Catalog &) = delete;
     Catalog &operator=(const Catalog &) = delete;

     // Is catalog valid?
     bool isOk() { return ok; }

     // Get number of pages.
     int getNumPages();

     // Get a page.
     Page *getPage(int i);

     // Get the reference for a page object.
     Ref *getPageRef(int i);

     // Return base URI, or NULL if none.
     const std::optional<std::string> &getBaseURI() const { return baseURI; }

     // Return the contents of the metadata stream, or NULL if there is
     // no metadata.
     std::unique_ptr<GooString> readMetadata();

     // Return the structure tree root object.
     StructTreeRoot *getStructTreeRoot();

     // Return values from the MarkInfo dictionary as flags in a bitfield.
     enum MarkInfoFlags
     {
         markInfoNull = 1 << 0,
         markInfoMarked = 1 << 1,
         markInfoUserProperties = 1 << 2,
         markInfoSuspects = 1 << 3,
     };
     unsigned int getMarkInfo();

     // Find a page, given its object ID.  Returns page number, or 0 if
     // not found.
     int findPage(const Ref pageRef);

     // Find a named destination.  Returns the link destination, or
     // NULL if <name> is not a destination.
     std::unique_ptr<LinkDest> findDest(const GooString *name);

     Object *getDests();

     // Get the number of named destinations in name-dict
     int numDests();

     // Get the i'th named destination name in name-dict
     const char *getDestsName(int i);

     // Get the i'th named destination link destination in name-dict
     std::unique_ptr<LinkDest> getDestsDest(int i);

     // Get the number of named destinations in name-tree
     int numDestNameTree() { return getDestNameTree()->numEntries(); }

     // Get the i'th named destination name in name-tree
     const GooString *getDestNameTreeName(int i) { return getDestNameTree()->getName(i); }

     // Get the i'th named destination link destination in name-tree
     std::unique_ptr<LinkDest> getDestNameTreeDest(int i);

     // Get the number of embedded files
     int numEmbeddedFiles() { return getEmbeddedFileNameTree()->numEntries(); }

     // Get the i'th file embedded (at the Document level) in the document
     std::unique_ptr<FileSpec> embeddedFile(int i);

     // Is there an embedded file with the given name?
     bool hasEmbeddedFile(const std::string &fileName);

     // Adds and embeddedFile
     // If there is already an existing embedded file with the given fileName
     // it gets replaced, if that's not what you want check hasEmbeddedFile first
     void addEmbeddedFile(GooFile *file, const std::string &fileName);

     // Get the number of javascript scripts
     int numJS() { return getJSNameTree()->numEntries(); }
     const GooString *getJSName(int i) { return getJSNameTree()->getName(i); }

     // Get the i'th JavaScript script (at the Document level) in the document
     GooString *getJS(int i);

     // Convert between page indices and page labels.
     bool labelToIndex(GooString *label, int *index);
     bool indexToLabel(int index, GooString *label);

     Object *getOutline();
     // returns the existing outline or new one if it doesn't exist
     Object *getCreateOutline();

     Object *getAcroForm() { return &acroForm; }
     void addFormToAcroForm(const Ref formRef);
     void removeFormFromAcroForm(const Ref formRef);
     void setAcroFormModified();

     OCGs *getOptContentConfig() { return optContent; }

     int getPDFMajorVersion() const { return catalogPdfMajorVersion; }
     int getPDFMinorVersion() const { return catalogPdfMinorVersion; }

     enum FormType
     {
         NoForm,
         AcroForm,
         XfaForm
     };

     FormType getFormType();
     // This can return nullptr if the document is in a very damaged state
     Form *getCreateForm();
     Form *getForm();

     ViewerPreferences *getViewerPreferences();

     enum PageMode
     {
         pageModeNone,
         pageModeOutlines,
         pageModeThumbs,
         pageModeFullScreen,
         pageModeOC,
         pageModeAttach,
         pageModeNull
     };
     enum PageLayout
     {
         pageLayoutNone,
         pageLayoutSinglePage,
         pageLayoutOneColumn,
         pageLayoutTwoColumnLeft,
         pageLayoutTwoColumnRight,
         pageLayoutTwoPageLeft,
         pageLayoutTwoPageRight,
         pageLayoutNull
     };

     // Returns the page mode.
     PageMode getPageMode();
     PageLayout getPageLayout();

     enum DocumentAdditionalActionsType
     {
         actionCloseDocument, ///< Performed before closing the document
         actionSaveDocumentStart, ///< Performed before saving the document
         actionSaveDocumentFinish, ///< Performed after saving the document
         actionPrintDocumentStart, ///< Performed before printing the document
         actionPrintDocumentFinish, ///< Performed after printing the document
     };

     std::unique_ptr<LinkAction> getAdditionalAction(DocumentAdditionalActionsType type);

 private:
     // Get page label info.
     PageLabelInfo *getPageLabelInfo();

     PDFDoc *doc;
     XRef *xref; // the xref table for this PDF file
     std::vector<std::pair<std::unique_ptr<Page>, Ref>> pages;
     std::vector<Object> *pagesList;
     std::vector<Ref> *pagesRefList;
     std::vector<PageAttrs *> *attrsList;
     std::vector<int> *kidsIdxList;
     Form *form;
     ViewerPreferences *viewerPrefs;
     int numPages; // number of pages
     Object dests; // named destination dictionary
     Object names; // named names dictionary
     NameTree *destNameTree; // named destination name-tree
     NameTree *embeddedFileNameTree; // embedded file name-tree
     NameTree *jsNameTree; // Java Script name-tree
     std::optional<std::string> baseURI; // base URI for URI-type links
     Object metadata; // metadata stream
     StructTreeRoot *structTreeRoot; // structure tree root
     unsigned int markInfo; // Flags from MarkInfo dictionary
     Object outline; // outline dictionary
     Object acroForm; // AcroForm dictionary
     Object viewerPreferences; // ViewerPreference dictionary
     OCGs *optContent; // Optional Content groups
     bool ok; // true if catalog is valid
     PageLabelInfo *pageLabelInfo; // info about page labels
     PageMode pageMode; // page mode
     PageLayout pageLayout; // page layout
     Object additionalActions; // page additional actions

     bool cachePageTree(int page); // Cache first <page> pages.
     Object *findDestInTree(Object *tree, GooString *name, Object *obj);

     Object *getNames();
     NameTree *getDestNameTree();
     NameTree *getEmbeddedFileNameTree();
     NameTree *getJSNameTree();
     std::unique_ptr<LinkDest> createLinkDest(Object *obj);

     int catalogPdfMajorVersion = -1;
     int catalogPdfMinorVersion = -1;

     mutable std::recursive_mutex mutex;
 };

 #endif
	//========================================================================
	//
	// Catalog.h
	//
	// Copyright 1996-2007 Glyph & Cog, LLC
	//
	//========================================================================

	//========================================================================
	//
	// Modified under the Poppler project - http://poppler.freedesktop.org
	//
	// All changes made under the Poppler project to this file are licensed
	// under GPL version 2 or later
	//
	// Copyright (C) 2005 Kristian Høgsberg <krh@redhat.com>
	// Copyright (C) 2005, 2007, 2009-2011, 2013, 2017-2023 Albert Astals Cid <aacid@kde.org>
	// Copyright (C) 2005 Jonathan Blandford <jrb@redhat.com>
	// Copyright (C) 2005, 2006, 2008 Brad Hards <bradh@frogmouth.net>
	// Copyright (C) 2007 Julien Rebetez <julienr@svn.gnome.org>
	// Copyright (C) 2008, 2011 Pino Toscano <pino@kde.org>
	// Copyright (C) 2010 Hib Eris <hib@hiberis.nl>
	// Copyright (C) 2012 Fabio D'Urso <fabiodurso@hotmail.it>
	// Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
	// Copyright (C) 2013 Adrian Perez de Castro <aperez@igalia.com>
	// Copyright (C) 2013, 2017 Adrian Johnson <ajohnson@redneon.com>
	// Copyright (C) 2013 José Aliste <jaliste@src.gnome.org>
	// Copyright (C) 2016 Masamichi Hosoda <trueroad@trueroad.jp>
	// Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by the LiMux project of the city of Munich
	// Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de>
	// Copyright (C) 2020 Oliver Sander <oliver.sander@tu-dresden.de>
	// Copyright (C) 2020 Katarina Behrens <Katarina.Behrens@cib.de>
	// Copyright (C) 2020 Klarälvdalens Datakonsult AB, a KDAB Group company, <info@kdab.com>. Work sponsored by Technische Universität Dresden
	// Copyright (C) 2021 RM <rm+git@arcsin.org>
	//
	// To see a description of the changes please see the Changelog file that
	// came with your tarball or type make ChangeLog if you are building from git
	//
	//========================================================================

	#ifndef CATALOG_H
	#define CATALOG_H

	#include "poppler-config.h"
	#include "poppler_private_export.h"
	#include "Object.h"
	#include "Link.h"

	#include <memory>
	#include <optional>
	#include <vector>

	class PDFDoc;
	class XRef;
	class Object;
	class Page;
	class PageAttrs;
	struct Ref;
	class PageLabelInfo;
	class Form;
	class OCGs;
	class ViewerPreferences;
	class FileSpec;
	class StructTreeRoot;

	//------------------------------------------------------------------------
	// NameTree
	//------------------------------------------------------------------------

	class POPPLER_PRIVATE_EXPORT NameTree
	{
	public:
	NameTree();
	~NameTree();

	NameTree(const NameTree &) = delete;
	NameTree &operator=(const NameTree &) = delete;

	void init(XRef xref, Object tree);
	Object lookup(const GooString *name);
	int numEntries() { return length; };
	// iterator accessor, note it returns a pointer to the internal object, do not free nor delete it
	Object *getValue(int i);
	const GooString *getName(int i) const;

	private:
	struct Entry
	{
	Entry(Array *array, int index);
	~Entry();
	GooString name;
	Object value;
	static int cmpEntry(const void voidEntry, const void voidOtherEntry);
	static int cmp(const void key, const void entry);
	};

	void parse(const Object *tree, RefRecursionChecker &seen);
	void addEntry(Entry *entry);

	XRef *xref;
	Entry **entries;
	int size, length; // size is the number of entries in
	// the array of Entry*
	// length is the number of real Entry
	};

	//------------------------------------------------------------------------
	// Catalog
	//------------------------------------------------------------------------

	class POPPLER_PRIVATE_EXPORT Catalog
	{
	public:
	// Constructor.
	explicit Catalog(PDFDoc *docA);

	// Destructor.
	~Catalog();

	Catalog(const Catalog &) = delete;
	Catalog &operator=(const Catalog &) = delete;

	// Is catalog valid?
	bool isOk() { return ok; }

	// Get number of pages.
	int getNumPages();

	// Get a page.
	Page *getPage(int i);

	// Get the reference for a page object.
	Ref *getPageRef(int i);

	// Return base URI, or NULL if none.
	const std::optional<std::string> &getBaseURI() const { return baseURI; }

	// Return the contents of the metadata stream, or NULL if there is
	// no metadata.
	std::unique_ptr<GooString> readMetadata();

	// Return the structure tree root object.
	StructTreeRoot *getStructTreeRoot();

	// Return values from the MarkInfo dictionary as flags in a bitfield.
	enum MarkInfoFlags
	{
	markInfoNull = 1 << 0,
	markInfoMarked = 1 << 1,
	markInfoUserProperties = 1 << 2,
	markInfoSuspects = 1 << 3,
	};
	unsigned int getMarkInfo();

	// Find a page, given its object ID. Returns page number, or 0 if
	// not found.
	int findPage(const Ref pageRef);

	// Find a named destination. Returns the link destination, or
	// NULL if <name> is not a destination.
	std::unique_ptr<LinkDest> findDest(const GooString *name);

	Object *getDests();

	// Get the number of named destinations in name-dict
	int numDests();

	// Get the i'th named destination name in name-dict
	const char *getDestsName(int i);

	// Get the i'th named destination link destination in name-dict
	std::unique_ptr<LinkDest> getDestsDest(int i);

	// Get the number of named destinations in name-tree
	int numDestNameTree() { return getDestNameTree()->numEntries(); }

	// Get the i'th named destination name in name-tree
	const GooString *getDestNameTreeName(int i) { return getDestNameTree()->getName(i); }

	// Get the i'th named destination link destination in name-tree
	std::unique_ptr<LinkDest> getDestNameTreeDest(int i);

	// Get the number of embedded files
	int numEmbeddedFiles() { return getEmbeddedFileNameTree()->numEntries(); }

	// Get the i'th file embedded (at the Document level) in the document
	std::unique_ptr<FileSpec> embeddedFile(int i);

	// Is there an embedded file with the given name?
	bool hasEmbeddedFile(const std::string &fileName);

	// Adds and embeddedFile
	// If there is already an existing embedded file with the given fileName
	// it gets replaced, if that's not what you want check hasEmbeddedFile first
	void addEmbeddedFile(GooFile *file, const std::string &fileName);

	// Get the number of javascript scripts
	int numJS() { return getJSNameTree()->numEntries(); }
	const GooString *getJSName(int i) { return getJSNameTree()->getName(i); }

	// Get the i'th JavaScript script (at the Document level) in the document
	GooString *getJS(int i);

	// Convert between page indices and page labels.
	bool labelToIndex(GooString label, int index);
	bool indexToLabel(int index, GooString *label);

	Object *getOutline();
	// returns the existing outline or new one if it doesn't exist
	Object *getCreateOutline();

	Object *getAcroForm() { return &acroForm; }
	void addFormToAcroForm(const Ref formRef);
	void removeFormFromAcroForm(const Ref formRef);
	void setAcroFormModified();

	OCGs *getOptContentConfig() { return optContent; }

	int getPDFMajorVersion() const { return catalogPdfMajorVersion; }
	int getPDFMinorVersion() const { return catalogPdfMinorVersion; }

	enum FormType
	{
	NoForm,
	AcroForm,
	XfaForm
	};

	FormType getFormType();
	// This can return nullptr if the document is in a very damaged state
	Form *getCreateForm();
	Form *getForm();

	ViewerPreferences *getViewerPreferences();

	enum PageMode
	{
	pageModeNone,
	pageModeOutlines,
	pageModeThumbs,
	pageModeFullScreen,
	pageModeOC,
	pageModeAttach,
	pageModeNull
	};
	enum PageLayout
	{
	pageLayoutNone,
	pageLayoutSinglePage,
	pageLayoutOneColumn,
	pageLayoutTwoColumnLeft,
	pageLayoutTwoColumnRight,
	pageLayoutTwoPageLeft,
	pageLayoutTwoPageRight,
	pageLayoutNull
	};

	// Returns the page mode.
	PageMode getPageMode();
	PageLayout getPageLayout();

	enum DocumentAdditionalActionsType
	{
	actionCloseDocument, ///< Performed before closing the document
	actionSaveDocumentStart, ///< Performed before saving the document
	actionSaveDocumentFinish, ///< Performed after saving the document
	actionPrintDocumentStart, ///< Performed before printing the document
	actionPrintDocumentFinish, ///< Performed after printing the document
	};

	std::unique_ptr<LinkAction> getAdditionalAction(DocumentAdditionalActionsType type);

	private:
	// Get page label info.
	PageLabelInfo *getPageLabelInfo();

	PDFDoc *doc;
	XRef *xref; // the xref table for this PDF file
	std::vector<std::pair<std::unique_ptr<Page>, Ref>> pages;
	std::vector<Object> *pagesList;
	std::vector<Ref> *pagesRefList;
	std::vector<PageAttrs > attrsList;
	std::vector<int> *kidsIdxList;
	Form *form;
	ViewerPreferences *viewerPrefs;
	int numPages; // number of pages
	Object dests; // named destination dictionary
	Object names; // named names dictionary
	NameTree *destNameTree; // named destination name-tree
	NameTree *embeddedFileNameTree; // embedded file name-tree
	NameTree *jsNameTree; // Java Script name-tree
	std::optional<std::string> baseURI; // base URI for URI-type links
	Object metadata; // metadata stream
	StructTreeRoot *structTreeRoot; // structure tree root
	unsigned int markInfo; // Flags from MarkInfo dictionary
	Object outline; // outline dictionary
	Object acroForm; // AcroForm dictionary
	Object viewerPreferences; // ViewerPreference dictionary
	OCGs *optContent; // Optional Content groups
	bool ok; // true if catalog is valid
	PageLabelInfo *pageLabelInfo; // info about page labels
	PageMode pageMode; // page mode
	PageLayout pageLayout; // page layout
	Object additionalActions; // page additional actions

	bool cachePageTree(int page); // Cache first <page> pages.
	Object findDestInTree(Object tree, GooString name, Object obj);

	Object *getNames();
	NameTree *getDestNameTree();
	NameTree *getEmbeddedFileNameTree();
	NameTree *getJSNameTree();
	std::unique_ptr<LinkDest> createLinkDest(Object *obj);

	int catalogPdfMajorVersion = -1;
	int catalogPdfMinorVersion = -1;

	mutable std::recursive_mutex mutex;
	};

	#endif