include/wx/xml/xml.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        xml.h
   3 // Purpose:     wxXmlDocument - XML parser & data holder class
   4 // Author:      Vaclav Slavik
   5 // Created:     2000/03/05
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2000 Vaclav Slavik
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11
  12 #ifndef _WX_XML_H_
  13 #define _WX_XML_H_
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_XML
  18
  19 #include "wx/string.h"
  20 #include "wx/object.h"
  21 #include "wx/list.h"
  22
  23 #ifdef WXMAKINGDLL_XML
  24     #define WXDLLIMPEXP_XML WXEXPORT
  25 #elif defined(WXUSINGDLL)
  26     #define WXDLLIMPEXP_XML WXIMPORT
  27 #else // not making nor using DLL
  28     #define WXDLLIMPEXP_XML
  29 #endif
  30
  31 class WXDLLIMPEXP_XML wxXmlNode;
  32 class WXDLLIMPEXP_XML wxXmlProperty;
  33 class WXDLLIMPEXP_XML wxXmlDocument;
  34 class WXDLLIMPEXP_XML wxXmlIOHandler;
  35 class WXDLLIMPEXP_BASE wxInputStream;
  36 class WXDLLIMPEXP_BASE wxOutputStream;
  37
  38
  39 // Represents XML node type.
  40 enum wxXmlNodeType
  41 {
  42     // note: values are synchronized with xmlElementType from libxml
  43     wxXML_ELEMENT_NODE       =  1,
  44     wxXML_ATTRIBUTE_NODE     =  2,
  45     wxXML_TEXT_NODE          =  3,
  46     wxXML_CDATA_SECTION_NODE =  4,
  47     wxXML_ENTITY_REF_NODE    =  5,
  48     wxXML_ENTITY_NODE        =  6,
  49     wxXML_PI_NODE            =  7,
  50     wxXML_COMMENT_NODE       =  8,
  51     wxXML_DOCUMENT_NODE      =  9,
  52     wxXML_DOCUMENT_TYPE_NODE = 10,
  53     wxXML_DOCUMENT_FRAG_NODE = 11,
  54     wxXML_NOTATION_NODE      = 12,
  55     wxXML_HTML_DOCUMENT_NODE = 13
  56 };
  57
  58
  59 // Represents node property(ies).
  60 // Example: in <img src="hello.gif" id="3"/> "src" is property with value
  61 //          "hello.gif" and "id" is prop. with value "3".
  62
  63 class WXDLLIMPEXP_XML wxXmlProperty
  64 {
  65 public:
  66     wxXmlProperty() : m_next(NULL) {}
  67     wxXmlProperty(const wxString& name, const wxString& value,
  68                   wxXmlProperty *next = NULL)
  69             : m_name(name), m_value(value), m_next(next) {}
  70     virtual ~wxXmlProperty() {}
  71
  72     wxString GetName() const { return m_name; }
  73     wxString GetValue() const { return m_value; }
  74     wxXmlProperty *GetNext() const { return m_next; }
  75
  76     void SetName(const wxString& name) { m_name = name; }
  77     void SetValue(const wxString& value) { m_value = value; }
  78     void SetNext(wxXmlProperty *next) { m_next = next; }
  79
  80 private:
  81     wxString m_name;
  82     wxString m_value;
  83     wxXmlProperty *m_next;
  84 };
  85
  86
  87
  88 // Represents node in XML document. Node has name and may have content
  89 // and properties. Most common node types are wxXML_TEXT_NODE (name and props
  90 // are irrelevant) and wxXML_ELEMENT_NODE (e.g. in <title>hi</title> there is
  91 // element with name="title", irrelevant content and one child (wxXML_TEXT_NODE
  92 // with content="hi").
  93 //
  94 // If wxUSE_UNICODE is 0, all strings are encoded in the encoding given to Load
  95 // (default is UTF-8).
  96
  97 class WXDLLIMPEXP_XML wxXmlNode
  98 {
  99 public:
 100     wxXmlNode() : m_properties(NULL), m_parent(NULL),
 101                   m_children(NULL), m_next(NULL) {}
 102     wxXmlNode(wxXmlNode *parent, wxXmlNodeType type,
 103               const wxString& name, const wxString& content = wxEmptyString,
 104               wxXmlProperty *props = NULL, wxXmlNode *next = NULL);
 105     virtual ~wxXmlNode();
 106
 107     // copy ctor & operator=. Note that this does NOT copy syblings
 108     // and parent pointer, i.e. m_parent and m_next will be NULL
 109     // after using copy ctor and are never unmodified by operator=.
 110     // On the other hand, it DOES copy children and properties.
 111     wxXmlNode(const wxXmlNode& node);
 112     wxXmlNode& operator=(const wxXmlNode& node);
 113
 114     // user-friendly creation:
 115     wxXmlNode(wxXmlNodeType type, const wxString& name,
 116               const wxString& content = wxEmptyString);
 117     virtual void AddChild(wxXmlNode *child);
 118     virtual bool InsertChild(wxXmlNode *child, wxXmlNode *before_node);
 119     virtual bool RemoveChild(wxXmlNode *child);
 120     virtual void AddProperty(const wxString& name, const wxString& value);
 121     virtual bool DeleteProperty(const wxString& name);
 122
 123     // access methods:
 124     wxXmlNodeType GetType() const { return m_type; }
 125     const wxString& GetName() const { return m_name; }
 126     const wxString& GetContent() const { return m_content; }
 127
 128     bool IsWhitespaceOnly() const;
 129     int GetDepth(wxXmlNode *grandparent = NULL) const;
 130
 131     // Gets node content from wxXML_ENTITY_NODE
 132     // The problem is, <tag>content<tag> is represented as
 133     // wxXML_ENTITY_NODE name="tag", content=""
 134     //    |-- wxXML_TEXT_NODE or
 135     //        wxXML_CDATA_SECTION_NODE name="" content="content"
 136     wxString GetNodeContent() const;
 137
 138     wxXmlNode *GetParent() const { return m_parent; }
 139     wxXmlNode *GetNext() const { return m_next; }
 140     wxXmlNode *GetChildren() const { return m_children; }
 141
 142     wxXmlProperty *GetProperties() const { return m_properties; }
 143     bool GetPropVal(const wxString& propName, wxString *value) const;
 144     wxString GetPropVal(const wxString& propName,
 145                         const wxString& defaultVal) const;
 146     bool HasProp(const wxString& propName) const;
 147
 148     void SetType(wxXmlNodeType type) { m_type = type; }
 149     void SetName(const wxString& name) { m_name = name; }
 150     void SetContent(const wxString& con) { m_content = con; }
 151
 152     void SetParent(wxXmlNode *parent) { m_parent = parent; }
 153     void SetNext(wxXmlNode *next) { m_next = next; }
 154     void SetChildren(wxXmlNode *child) { m_children = child; }
 155
 156     void SetProperties(wxXmlProperty *prop) { m_properties = prop; }
 157     virtual void AddProperty(wxXmlProperty *prop);
 158
 159 private:
 160     wxXmlNodeType m_type;
 161     wxString m_name;
 162     wxString m_content;
 163     wxXmlProperty *m_properties;
 164     wxXmlNode *m_parent, *m_children, *m_next;
 165
 166     void DoCopy(const wxXmlNode& node);
 167 };
 168
 169
 170
 171 // special indentation value for wxXmlDocument::Save
 172 #define wxXML_NO_INDENTATION           (-1)
 173
 174 // flags for wxXmlDocument::Load
 175 enum wxXmlDocumentLoadFlag
 176 {
 177     wxXMLDOC_NONE = 0,
 178     wxXMLDOC_KEEP_WHITESPACE_NODES = 1
 179 };
 180
 181
 182 // This class holds XML data/document as parsed by XML parser.
 183
 184 class WXDLLIMPEXP_XML wxXmlDocument : public wxObject
 185 {
 186 public:
 187     wxXmlDocument();
 188     wxXmlDocument(const wxString& filename,
 189                   const wxString& encoding = wxT("UTF-8"));
 190     wxXmlDocument(wxInputStream& stream,
 191                   const wxString& encoding = wxT("UTF-8"));
 192     virtual ~wxXmlDocument() { wxDELETE(m_root); }
 193
 194     wxXmlDocument(const wxXmlDocument& doc);
 195     wxXmlDocument& operator=(const wxXmlDocument& doc);
 196
 197     // Parses .xml file and loads data. Returns TRUE on success, FALSE
 198     // otherwise.
 199     virtual bool Load(const wxString& filename,
 200                       const wxString& encoding = wxT("UTF-8"), int flags = wxXMLDOC_NONE);
 201     virtual bool Load(wxInputStream& stream,
 202                       const wxString& encoding = wxT("UTF-8"), int flags = wxXMLDOC_NONE);
 203
 204     // Saves document as .xml file.
 205     virtual bool Save(const wxString& filename, int indentstep = 1) const;
 206     virtual bool Save(wxOutputStream& stream, int indentstep = 1) const;
 207
 208     bool IsOk() const { return m_root != NULL; }
 209
 210     // Returns root node of the document.
 211     wxXmlNode *GetRoot() const { return m_root; }
 212
 213     // Returns version of document (may be empty).
 214     const wxString& GetVersion() const { return m_version; }
 215     // Returns encoding of document (may be empty).
 216     // Note: this is the encoding original file was saved in, *not* the
 217     // encoding of in-memory representation!
 218     const wxString& GetFileEncoding() const { return m_fileEncoding; }
 219
 220     // Write-access methods:
 221     wxXmlNode *DetachRoot() { wxXmlNode *old=m_root; m_root=NULL; return old; }
 222     void SetRoot(wxXmlNode *node) { wxDELETE(m_root); m_root = node; }
 223     void SetVersion(const wxString& version) { m_version = version; }
 224     void SetFileEncoding(const wxString& encoding) { m_fileEncoding = encoding; }
 225
 226 #if !wxUSE_UNICODE
 227     // Returns encoding of in-memory representation of the document
 228     // (same as passed to Load or ctor, defaults to UTF-8).
 229     // NB: this is meaningless in Unicode build where data are stored as wchar_t*
 230     wxString GetEncoding() const { return m_encoding; }
 231     void SetEncoding(const wxString& enc) { m_encoding = enc; }
 232 #endif
 233
 234 private:
 235     wxString   m_version;
 236     wxString   m_fileEncoding;
 237 #if !wxUSE_UNICODE
 238     wxString   m_encoding;
 239 #endif
 240     wxXmlNode *m_root;
 241
 242     void DoCopy(const wxXmlDocument& doc);
 243
 244     DECLARE_CLASS(wxXmlDocument)
 245 };
 246
 247 #endif // wxUSE_XML
 248
 249 #endif // _WX_XML_H_