wxWidgets: wxXmlDocument Class Reference (original) (raw)

#include <wx/xml/xml.h>

This class holds XML data/document as parsed by XML parser in the root node.

wxXmlDocument internally uses the expat library which comes with wxWidgets to parse the given stream.

A simple example of using XML classes is:

if (!doc.Load("myfile.xml"))

return false;

return false;

while (prolog) {

...

}

}

while (child) {

if (child->GetName() == "tag1") {

...

...

} else if (child->GetName() == "tag2") {

}

}

Note that if you want to preserve the original formatting of the loaded file including whitespaces and indentation, you need to turn off whitespace-only textnode removal and automatic indentation:

Using default parameters, you will get a reformatted document which in general is different from the original loaded content:

doc.Load("myfile.xml");

doc.Save("myfile2.xml");

Category: XML

See also

wxXmlNode, wxXmlAttribute

Public Member Functions
	wxXmlDocument ()
	Default constructor. More...
	wxXmlDocument (const wxXmlDocument &doc)
	Copy constructor. More...
	wxXmlDocument (const wxString &filename, const wxString &encoding="UTF-8"))
	Loads the given filename using the given encoding. More...
	wxXmlDocument (wxInputStream &stream, const wxString &encoding="UTF-8")
	Loads the XML document from given stream using the given encoding. More...
virtual	~wxXmlDocument ()
	Virtual destructor. More...
void	AppendToProlog (wxXmlNode *node)
	Appends a Process Instruction or Comment node to the document prologue. More...
wxXmlNode *	DetachDocumentNode ()
	Detaches the document node and returns it. More...
wxXmlNode *	DetachRoot ()
	Detaches the root entity node and returns it. More...
wxString	GetEncoding () const
	Returns encoding of in-memory representation of the document (same as passed to Load() or constructor, defaults to UTF-8). More...
const wxString &	GetFileEncoding () const
	Returns encoding of document (may be empty). More...
wxXmlNode *	GetDocumentNode () const
	Returns the document node of the document. More...
wxXmlNode *	GetRoot () const
	Returns the root element node of the document. More...
const wxString &	GetVersion () const
	Returns the version of document. More...
bool	IsOk () const
	Returns true if the document has been loaded successfully. More...
virtual bool	Load (const wxString &filename, const wxString &encoding="UTF-8", int flags=wxXMLDOC_NONE)
	Parses filename as an xml document and loads its data. More...
virtual bool	Load (wxInputStream &stream, const wxString &encoding="UTF-8", int flags=wxXMLDOC_NONE)
	Like Load(const wxString&, const wxString&, int) but takes the data from given input stream. More...
virtual bool	Save (const wxString &filename, int indentstep=2) const
	Saves XML tree creating a file named with given string. More...
virtual bool	Save (wxOutputStream &stream, int indentstep=2) const
	Saves XML tree in the given output stream. More...
void	SetDocumentNode (wxXmlNode *node)
	Sets the document node of this document. More...
void	SetEncoding (const wxString &enc)
	Sets the encoding of the document. More...
void	SetFileEncoding (const wxString &encoding)
	Sets the encoding of the file which will be used to save the document. More...
void	SetRoot (wxXmlNode *node)
	Sets the root element node of this document. More...
void	SetVersion (const wxString &version)
	Sets the version of the XML file which will be used to save the document. More...
wxXmlDocument &	operator= (const wxXmlDocument &doc)
	Deep copies the given document. More...
Public Member Functions inherited from wxObject
	wxObject ()
	Default ctor; initializes to NULL the internal reference data. More...
	wxObject (const wxObject &other)
	Copy ctor. More...
virtual	~wxObject ()
	Destructor. More...
virtual wxClassInfo *	GetClassInfo () const
	This virtual function is redefined for every class that requires run-time type information, when using the wxDECLARE_CLASS macro (or similar). More...
wxObjectRefData *	GetRefData () const
	Returns the wxObject::m_refData pointer, i.e. the data referenced by this object. More...
bool	IsKindOf (const wxClassInfo *info) const
	Determines whether this class is a subclass of (or the same class as) the given class. More...
bool	IsSameAs (const wxObject &obj) const
	Returns true if this object has the same data pointer as obj. More...
void	Ref (const wxObject &clone)
	Makes this object refer to the data in clone. More...
void	SetRefData (wxObjectRefData *data)
	Sets the wxObject::m_refData pointer. More...
void	UnRef ()
	Decrements the reference count in the associated data, and if it is zero, deletes the data. More...
void	UnShare ()
	This is the same of AllocExclusive() but this method is public. More...
void	operator delete (void *buf)
	The delete operator is defined for debugging versions of the library only, when the identifier WXDEBUG is defined. More...
void *	operator new (size_t size, const wxString &filename=NULL, int lineNum=0)
	The new operator is defined for debugging versions of the library only, when the identifier WXDEBUG is defined. More...

Additional Inherited Members
Protected Member Functions inherited from wxObject
void	AllocExclusive ()
	Ensure that this object's data is not shared with any other object. More...
virtual wxObjectRefData *	CreateRefData () const
	Creates a new instance of the wxObjectRefData-derived class specific to this object and returns it. More...
virtual wxObjectRefData *	CloneRefData (const wxObjectRefData *data) const
	Creates a new instance of the wxObjectRefData-derived class specific to this object and initializes it copying data. More...
Protected Attributes inherited from wxObject
wxObjectRefData *	m_refData
	Pointer to an object which is the object's reference-counted data. More...

Default constructor.

Copy constructor.

Deep copies all the XML tree of the given document.

Loads the given filename using the given encoding.

See Load().

Loads the XML document from given stream using the given encoding.

See Load().

Virtual destructor.

Frees the document root node.

Appends a Process Instruction or Comment node to the document prologue.

Calling this function will create a prologue or attach the node to the end of an existing prologue.

Since

2.9.2

Detaches the document node and returns it.

The document node will be set to NULL and thus IsOk() will return false after calling this function.

Note that the caller is responsible for deleting the returned node in order to avoid memory leaks.

Since

2.9.2

Detaches the root entity node and returns it.

After calling this function, the document node will remain together with any prologue nodes, but IsOk() will return false since the root entity will be missing.

Note that the caller is responsible for deleting the returned node in order to avoid memory leaks.

Returns the document node of the document.

Since

2.9.2

Returns encoding of in-memory representation of the document (same as passed to Load() or constructor, defaults to UTF-8).

Note

this is meaningless in Unicode build where data are stored as wchar_t*.

Returns encoding of document (may be empty).

Note

This is the encoding original file was saved in, not the encoding of in-memory representation!

Get expat library version information.

Since

2.9.2

See also

wxVersionInfo

Returns the root element node of the document.

Returns the version of document.

This is the value in the <?xml version="1.0"?> header of the XML document. If the version attribute was not explicitly given in the header, this function returns an empty string.

Returns true if the document has been loaded successfully.

Parses filename as an xml document and loads its data.

If flags does not contain wxXMLDOC_KEEP_WHITESPACE_NODES, then, while loading, all nodes of type wxXML_TEXT_NODE (see wxXmlNode) are automatically skipped if they contain whitespaces only.

The removal of these nodes makes the load process slightly faster and requires less memory however makes impossible to recreate exactly the loaded text with a Save() call later. Read the initial description of this class for more info.

Returns true on success, false otherwise.

Deep copies the given document.

Saves XML tree creating a file named with given string.

If indentstep is greater than or equal to zero, then, while saving, an automatic indentation is added with steps composed by indentstep spaces.

If indentstep is wxXML_NO_INDENTATION, then, automatic indentation is turned off.

Saves XML tree in the given output stream.

See Save(const wxString&, int) for a description of indentstep.

Sets the document node of this document.

Deletes any previous document node. Use DetachDocumentNode() and then SetDocumentNode() if you want to replace the document node without deleting the old document tree.

Since

2.9.2

Sets the encoding of the document.

Sets the encoding of the file which will be used to save the document.

Sets the root element node of this document.

Will create the document node if necessary. Any previous root element node is deleted.

Sets the version of the XML file which will be used to save the document.