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