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Structure tree information tool

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This commit is contained in:
Jakub Melka
2020-10-10 14:45:14 +02:00
parent e735c66d5c
commit b0831a84a7
7 changed files with 458 additions and 9 deletions
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54
PdfForQtLib/sources/pdfstructuretree.h
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@ -28,6 +28,27 @@ namespace pdf
class PDFObjectStorage;
struct PDFStructureTreeAttributeDefinition;
class PDFStructureItem;
class PDFStructureTree;
class PDFStructureElement;
class PDFStructureMarkedContentReference;
class PDFStructureObjectReference;
class PDFFORQTLIBSHARED_EXPORT PDFStructureTreeAbstractVisitor
{
public:
inline PDFStructureTreeAbstractVisitor() = default;
virtual ~PDFStructureTreeAbstractVisitor() = default;
virtual void visitStructureTree(const PDFStructureTree* structureTree);
virtual void visitStructureElement(const PDFStructureElement* structureElement);
virtual void visitStructureMarkedContentReference(const PDFStructureMarkedContentReference* structureMarkedContentReference);
virtual void visitStructureObjectReference(const PDFStructureObjectReference* structureObjectReference);
protected:
void acceptChildren(const PDFStructureItem* item);
};
class PDFFORQTLIBSHARED_EXPORT PDFStructureTreeAttribute
{
public:
@ -137,9 +158,15 @@ public:
/// Returns attribute type
Attribute getType() const;
/// Returns attribute type name
QString getTypeName(const PDFObjectStorage* storage) const;
/// Returns attribute owner
Owner getOwner() const { return m_owner; }
/// Returns owner name
QString getOwnerName() const;
/// Returns true, if attribute is inheritable
bool isInheritable() const;
@ -159,13 +186,16 @@ public:
/// cannot be determined, empty object is returned.
PDFObject getDefaultValue() const;
/// Returns true, if attribute is user defined
bool isUser() const { return getType() == Attribute::User; }
/// Returns user property name. This function should be called only for
/// user properties. If error occurs, then empty string is returned.
/// \param storage Storage (for resolving of indirect objects)
QString getUserPropertyName(const PDFObjectStorage* storage) const;
/// Returns user property value. This function should be called only for
/// user properties. If error occurs, then empty string is returned.
/// user properties. If error occurs, then empty object is returned.
/// \param storage Storage (for resolving of indirect objects)
PDFObject getUserPropertyValue(const PDFObjectStorage* storage) const;
@ -220,7 +250,7 @@ class PDFStructureMarkedContentReference;
using PDFStructureItemPointer = QSharedPointer<PDFStructureItem>;
/// Root class for all structure tree items
class PDFStructureItem
class PDFFORQTLIBSHARED_EXPORT PDFStructureItem
{
public:
explicit inline PDFStructureItem(PDFStructureItem* parent, PDFStructureTree* root) :
@ -273,6 +303,8 @@ public:
virtual PDFStructureObjectReference* asStructureObjectReference() { return nullptr; }
virtual const PDFStructureObjectReference* asStructureObjectReference() const { return nullptr; }
virtual void accept(PDFStructureTreeAbstractVisitor* visitor) const = 0;
const PDFStructureItem* getParent() const { return m_parent; }
PDFStructureItem* getParent() { return m_parent; }
const PDFStructureTree* getTree() const { return m_root; }
@ -312,7 +344,7 @@ protected:
};
/// Structure tree namespace
class PDFStructureTreeNamespace
class PDFFORQTLIBSHARED_EXPORT PDFStructureTreeNamespace
{
public:
explicit inline PDFStructureTreeNamespace() = default;
@ -334,7 +366,7 @@ private:
using PDFStructureTreeNamespaces = std::vector<PDFStructureTreeNamespace>;
/// Structure tree, contains structure element hierarchy
class PDFStructureTree : public PDFStructureItem
class PDFFORQTLIBSHARED_EXPORT PDFStructureTree : public PDFStructureItem
{
public:
explicit inline PDFStructureTree() : PDFStructureItem(nullptr, this) { }
@ -342,6 +374,8 @@ public:
virtual PDFStructureTree* asStructureTree() override { return this; }
virtual const PDFStructureTree* asStructureTree() const override { return this; }
virtual void accept(PDFStructureTreeAbstractVisitor* visitor) const override { visitor->visitStructureTree(this); }
/// Returns parents from parent tree for given entry. If entry
/// is not found, then empty vector is returned.
/// \param id Id
@ -366,6 +400,9 @@ public:
/// Returns a list of associated files
const std::vector<PDFFileSpecification>& getAssociatedFiles() const { return m_associatedFiles; }
/// Returns true, if structure tree is valid
bool isValid() const { return getChildCount() > 0; }
/// Parses structure tree from the object. If error occurs, empty structure
/// tree is returned.
/// \param storage Storage
@ -397,7 +434,7 @@ private:
};
/// Structure element
class PDFStructureElement : public PDFStructureItem
class PDFFORQTLIBSHARED_EXPORT PDFStructureElement : public PDFStructureItem
{
public:
explicit inline PDFStructureElement(PDFStructureItem* parent, PDFStructureTree* root) :
@ -419,6 +456,7 @@ public:
virtual PDFStructureElement* asStructureElement() override { return this; }
virtual const PDFStructureElement* asStructureElement() const override { return this; }
virtual void accept(PDFStructureTreeAbstractVisitor* visitor) const override { visitor->visitStructureElement(this); }
const QByteArray& getTypeName() const { return m_typeName; }
Type getStandardType() const { return m_standardType; }
@ -488,7 +526,7 @@ private:
};
/// Structure marked content reference
class PDFStructureMarkedContentReference : public PDFStructureItem
class PDFFORQTLIBSHARED_EXPORT PDFStructureMarkedContentReference : public PDFStructureItem
{
public:
explicit inline PDFStructureMarkedContentReference(PDFStructureItem* parent, PDFStructureTree* root) :
@ -499,6 +537,7 @@ public:
virtual PDFStructureMarkedContentReference* asStructureMarkedContentReference() override { return this; }
virtual const PDFStructureMarkedContentReference* asStructureMarkedContentReference() const override { return this; }
virtual void accept(PDFStructureTreeAbstractVisitor* visitor) const override { visitor->visitStructureMarkedContentReference(this); }
const PDFObjectReference& getPageReference() const { return m_pageReference; }
const PDFObjectReference& getContentStreamReference() const { return m_contentStreamReference; }
@ -525,7 +564,7 @@ private:
};
/// Structure object reference
class PDFStructureObjectReference : public PDFStructureItem
class PDFFORQTLIBSHARED_EXPORT PDFStructureObjectReference : public PDFStructureItem
{
public:
explicit inline PDFStructureObjectReference(PDFStructureItem* parent, PDFStructureTree* root) :
@ -536,6 +575,7 @@ public:
virtual PDFStructureObjectReference* asStructureObjectReference() override { return this; }
virtual const PDFStructureObjectReference* asStructureObjectReference() const override { return this; }
virtual void accept(PDFStructureTreeAbstractVisitor* visitor) const override { visitor->visitStructureObjectReference(this); }
const PDFObjectReference& getPageReference() const { return m_pageReference; }
const PDFObjectReference& getObjectReference() const { return m_objectReference; }