6e26d6b78c
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48994 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
322 lines
11 KiB
TeX
322 lines
11 KiB
TeX
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%% Name: xmlnode.tex
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%% Purpose: wxXmlNode documentation
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%% Author: Francesco Montorsi
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%% Created: 2006-04-18
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%% RCS-ID: $Id$
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%% Copyright: (c) 2006 Francesco Montorsi
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%% License: wxWindows license
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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\section{\class{wxXmlNode}}\label{wxxmlnode}
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Represents a node in an XML document. See \helpref{wxXmlDocument}{wxxmldocument}.
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Node has a name and may have content and attributes. Most common node types are
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{\tt wxXML\_TEXT\_NODE} (name and attributes are irrelevant) and
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{\tt wxXML\_ELEMENT\_NODE} (e.g. in {\tt <title>hi</title>} there is an element
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with name="title", irrelevant content and one child ({\tt wxXML\_TEXT\_NODE}
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with content="hi").
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If \texttt{wxUSE\_UNICODE} is 0, all strings are encoded in the encoding given to
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\helpref{wxXmlDocument::Load}{wxxmldocumentload} (default is UTF-8).
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\wxheading{Derived from}
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No base class
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\wxheading{Include files}
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<wx/xml/xml.h>
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\wxheading{Library}
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\helpref{wxXml}{librarieslist}
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\wxheading{Constants}
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The following are the node types supported by \helpref{wxXmlNode}{wxxmlnode}:
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{\small
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\begin{verbatim}
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enum wxXmlNodeType
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{
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wxXML_ELEMENT_NODE,
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wxXML_ATTRIBUTE_NODE,
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wxXML_TEXT_NODE,
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wxXML_CDATA_SECTION_NODE,
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wxXML_ENTITY_REF_NODE,
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wxXML_ENTITY_NODE,
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wxXML_PI_NODE,
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wxXML_COMMENT_NODE,
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wxXML_DOCUMENT_NODE,
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wxXML_DOCUMENT_TYPE_NODE,
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wxXML_DOCUMENT_FRAG_NODE,
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wxXML_NOTATION_NODE,
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wxXML_HTML_DOCUMENT_NODE
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}
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\end{verbatim}
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}
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\wxheading{See also}
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\helpref{wxXmlDocument}{wxxmldocument}, \helpref{wxXmlAttribute}{wxxmlattribute}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxXmlNode::wxXmlNode}\label{wxxmlnodewxxmlnode}
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\func{}{wxXmlNode}{\param{wxXmlNode* }{parent}, \param{wxXmlNodeType }{type}, \param{const wxString\& }{name}, \param{const wxString\& }{content = wxEmptyString}, \param{wxXmlAttribute* }{attrs = \NULL}, \param{wxXmlNode* }{next = \NULL}, \param{int }{lineNo = -1}}
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\wxheading{Parameters}
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\docparam{parent}{The parent node to which append this node instance.
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If this argument is \NULL this new node will be {\it floating} and it can be appended later to
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another one using the \helpref{AddChild}{wxxmlnodeaddchild} or \helpref{InsertChild}{wxxmlnodeinsertchild}
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functions. Otherwise the child is already added to the XML tree by this
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constructor and it shouldn't be done again.}
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\docparam{type}{One of the wxXmlNodeType enumeration value.}
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\docparam{name}{The name of the node. This is the string which appears between angular brackets.}
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\docparam{content}{The content of the node. Only meaningful when {\it type} is
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{\tt wxXML\_TEXT\_NODE} or {\tt wxXML\_CDATA\_SECTION\_NODE}.}
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\docparam{attrs}{If not \NULL, this \helpref{wxXmlAttribute}{wxxmlattribute} object
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and its eventual siblings are attached to the node.}
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\docparam{next}{If not \NULL, this node and its eventual siblings are attached to
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the node.}
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\docparam{lineNo}{Number of line this node was present at in input file or -1.}
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Creates this XML node and eventually insert it into an existing XML tree.
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\func{}{wxXmlNode}{\param{const wxXmlNode\& }{node}}
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Copy constructor. Note that this does NOT copy syblings
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and parent pointer, i.e. \helpref{GetParent()}{wxxmlnodegetparent} and
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\helpref{GetNext()}{wxxmlnodegetnext} will return \NULL
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after using copy ctor and are never unmodified by operator=.
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On the other hand, it DOES copy children and attributes.
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\func{}{wxXmlNode}{\param{wxXmlNodeType }{type}, \param{const wxString\& }{name}, \param{const wxString\& }{content = wxEmptyString}, \param{int }{lineNo = -1}}
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A simplified version of the first constructor form, assuming a \NULL parent.
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\membersection{wxXmlNode::\destruct{wxXmlNode}}\label{wxxmlnodedtor}
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\func{}{\destruct{wxXmlNode}}{\void}
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The virtual destructor. Deletes attached children and attributes.
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\membersection{wxXmlNode::AddChild}\label{wxxmlnodeaddchild}
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\func{void}{AddChild}{\param{wxXmlNode* }{child}}
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Adds the given node as child of this node. To attach a second children to this node, use the
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\helpref{SetNext()}{wxxmlnodesetnext} function of the {\it child} node.
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\membersection{wxXmlNode::AddAttribute}\label{wxxmlnodeaddattribute}
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\func{void}{AddAttribute}{\param{const wxString\& }{name}, \param{const wxString\& }{value}}
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Appends a attribute with given {\it name} and {\it value} to the list of attributes for this node.
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\func{void}{AddAttribute}{\param{wxXmlAttribute* }{attr}}
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Appends given attribute to the list of attributes for this node.
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\membersection{wxXmlNode::DeleteAttribute}\label{wxxmlnodedeleteattribute}
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\func{bool}{DeleteAttribute}{\param{const wxString\& }{name}}
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Removes the first attributes which has the given {\it name} from the list of attributes for this node.
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\membersection{wxXmlNode::GetChildren}\label{wxxmlnodegetchildren}
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\constfunc{wxXmlNode*}{GetChildren}{\void}
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Returns the first child of this node.
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To get a pointer to the second child of this node (if it does exist), use the
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\helpref{GetNext()}{wxxmlnodegetnext} function on the returned value.
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\membersection{wxXmlNode::GetContent}\label{wxxmlnodegetcontent}
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\constfunc{wxString}{GetContent}{\void}
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Returns the content of this node. Can be an empty string.
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Be aware that for nodes of type \texttt{wxXML\_ELEMENT\_NODE} (the most used node type) the
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content is an empty string. See \helpref{GetNodeContent()}{wxxmlnodegetnodecontent} for more details.
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\membersection{wxXmlNode::GetDepth}\label{wxxmlnodegetdepth}
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\constfunc{int}{GetDepth}{\param{wxXmlNode* }{grandparent = NULL}}
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Returns the number of nodes which separe this node from {\tt grandparent}.
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This function searches only the parents of this node until it finds {\tt grandparent}
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or the \NULL node (which is the parent of non-linked nodes or the parent of a
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\helpref{wxXmlDocument}{wxxmldocument}'s root node).
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\membersection{wxXmlNode::GetLineNumber}\label{wxxmlnodegetlinenumber}
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\constfunc{int}{GetLineNumber}{\void}
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Returns line number of the node in the input XML file or -1 if it is unknown.
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\membersection{wxXmlNode::GetNodeContent}\label{wxxmlnodegetnodecontent}
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\constfunc{wxString}{GetNodeContent}{\void}
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Returns the content of the first child node of type \texttt{wxXML\_TEXT\_NODE} or \texttt{wxXML\_CDATA\_SECTION\_NODE}.
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This function is very useful since the XML snippet \texttt{``<tagname>tagcontent</tagname>"} is represented by
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expat with the following tag tree:
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\begin{verbatim}
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wxXML_ENTITY_NODE name="tagname", content=""
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|-- wxXML_TEXT_NODE name="", content="tagcontent"
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\end{verbatim}
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or eventually:
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\begin{verbatim}
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wxXML_ENTITY_NODE name="tagname", content=""
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|-- wxXML_CDATA_SECTION_NODE name="", content="tagcontent"
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\end{verbatim}
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An empty string is returned if the node has no children of type \texttt{wxXML\_TEXT\_NODE} or \texttt{wxXML\_CDATA\_SECTION\_NODE}, or if the content of the first child of such types is empty.
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\membersection{wxXmlNode::GetName}\label{wxxmlnodegetname}
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\constfunc{wxString}{GetName}{\void}
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Returns the name of this node. Can be an empty string (e.g. for nodes of type {\tt wxXML\_TEXT\_NODE} or {\tt wxXML\_CDATA\_SECTION\_NODE}).
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\membersection{wxXmlNode::GetNext}\label{wxxmlnodegetnext}
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\constfunc{wxXmlNode*}{GetNext}{\void}
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Returns a pointer to the sibling of this node or \NULL if there are no siblings.
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\membersection{wxXmlNode::GetParent}\label{wxxmlnodegetparent}
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\constfunc{wxXmlNode*}{GetParent}{\void}
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Returns a pointer to the parent of this node or \NULL if this node has no parent.
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\membersection{wxXmlNode::GetAttribute}\label{wxxmlnodegetattribute}
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\constfunc{bool}{GetAttribute}{\param{const wxString\& }{attrName}, \param{wxString* }{value}}
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Returns \true if a attribute named {\it attrName} could be found.
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The value of that attribute is saved in \arg{value} (which
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must not be \NULL).
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\constfunc{wxString}{GetAttribute}{\param{const wxString\& }{attrName}, \param{const wxString\& }{defaultVal}}
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Returns the value of the attribute named {\it attrName} if it does exist.
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If it does not exist, the {\it defaultVal} is returned.
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\membersection{wxXmlNode::GetAttributes}\label{wxxmlnodegetattributes}
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\constfunc{wxXmlAttribute *}{GetAttributes}{\void}
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Return a pointer to the first attribute of this node.
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\membersection{wxXmlNode::GetType}\label{wxxmlnodegettype}
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\constfunc{wxXmlNodeType}{GetType}{\void}
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Returns the type of this node.
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\membersection{wxXmlNode::HasAttribute}\label{wxxmlnodehasattribute}
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\constfunc{bool}{HasAttribute}{\param{const wxString\& }{attrName}}
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Returns \true if this node has a attribute named {\it attrName}.
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\membersection{wxXmlNode::InsertChild}\label{wxxmlnodeinsertchild}
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\func{bool}{InsertChild}{\param{wxXmlNode* }{child}, \param{wxXmlNode* }{before\_node}}
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Inserts the {\it child} node after {\it before\_node} in the children list.
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If {\it before\_node} is \NULL, then {\it child} is prepended to the list of children and
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becomes the first child of this node.
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Returns \true if {\it before\_node} has been found and the {\it child} node has been inserted.
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\membersection{wxXmlNode::IsWhitespaceOnly}\label{wxxmlnodecontainsiswhitespaceonly}
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\constfunc{bool}{IsWhitespaceOnly}{\void}
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Returns \true if the content of this node is a string containing only whitespaces (spaces,
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tabs, new lines, etc). Note that this function is locale-independent since the parsing of XML
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documents must always produce the exact same tree regardless of the locale it runs under.
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\membersection{wxXmlNode::RemoveChild}\label{wxxmlnoderemovechild}
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\func{bool}{RemoveChild}{\param{wxXmlNode* }{child}}
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Removes the given node from the children list. Returns \true if the node was found and removed
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or \false if the node could not be found.
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Note that the caller is reponsible for deleting the removed node in order to avoid memory leaks.
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\membersection{wxXmlNode::SetChildren}\label{wxxmlnodesetchildren}
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\func{void}{SetChildren}{\param{wxXmlNode* }{child}}
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Sets as first child the given node. The caller is responsible to delete any previously present
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children node.
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\membersection{wxXmlNode::SetContent}\label{wxxmlnodesetcontent}
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\func{void}{SetContent}{\param{const wxString\& }{con}}
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Sets the content of this node.
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\membersection{wxXmlNode::SetName}\label{wxxmlnodesetname}
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\func{void}{SetName}{\param{const wxString\& }{name}}
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Sets the name of this node.
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\membersection{wxXmlNode::SetNext}\label{wxxmlnodesetnext}
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\func{void}{SetNext}{\param{wxXmlNode* }{next}}
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Sets as sibling the given node. The caller is responsible to delete any previously present
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sibling node.
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\membersection{wxXmlNode::SetParent}\label{wxxmlnodesetparent}
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\func{void}{SetParent}{\param{wxXmlNode* }{parent}}
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Sets as parent the given node. The caller is responsible to delete any previously present
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parent node.
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\membersection{wxXmlNode::SetAttributes}\label{wxxmlnodesetattributes}
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\func{void}{SetAttributes}{\param{wxXmlAttribute* }{attr}}
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Sets as first attribute the given wxXmlAttribute object.
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The caller is responsible to delete any previously present attributes attached to this node.
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\membersection{wxXmlNode::SetType}\label{wxxmlnodesettype}
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\func{void}{SetType}{\param{wxXmlNodeType }{type}}
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Sets the type of this node.
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\membersection{wxXmlNode::operator=}\label{wxxmlnodeoperatorassign}
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\func{wxXmlNode\&}{operator=}{\param{const wxXmlNode\& }{node}}
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See the copy constructor for more info.
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