src/xrc/xml.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        xml.cpp
   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 #ifdef __GNUG__
  12 #pragma implementation "xml.h"
  13 #pragma implementation "xmlio.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20     #pragma hdrstop
  21 #endif
  22
  23
  24 #include "wx/wfstream.h"
  25 #include "wx/datstrm.h"
  26 #include "wx/zstream.h"
  27 #include "wx/log.h"
  28 #include "wx/intl.h"
  29
  30 #include "wx/xrc/xml.h"
  31 #include "wx/xrc/xmlio.h"
  32
  33
  34
  35 wxXmlNode::wxXmlNode(wxXmlNode *parent,wxXmlNodeType type,
  36                      const wxString& name, const wxString& content,
  37                      wxXmlProperty *props, wxXmlNode *next)
  38     : m_type(type), m_name(name), m_content(content),
  39       m_properties(props), m_parent(parent),
  40       m_children(NULL), m_next(next)
  41 {
  42     if (m_parent)
  43     {
  44         if (m_parent->m_children)
  45         {
  46             m_next = m_parent->m_children;
  47             m_parent->m_children = this;
  48         }
  49         else
  50             m_parent->m_children = this;
  51     }
  52 }
  53
  54
  55
  56 wxXmlNode::wxXmlNode(wxXmlNodeType type, const wxString& name,
  57                      const wxString& content)
  58     : m_type(type), m_name(name), m_content(content),
  59       m_properties(NULL), m_parent(NULL),
  60       m_children(NULL), m_next(NULL)
  61 {}
  62
  63
  64
  65 wxXmlNode::wxXmlNode(const wxXmlNode& node)
  66 {
  67     m_next = NULL;
  68     m_parent = NULL;
  69     DoCopy(node);
  70 }
  71
  72
  73
  74 wxXmlNode& wxXmlNode::operator=(const wxXmlNode& node)
  75 {
  76     delete m_properties;
  77     delete m_children;
  78     DoCopy(node);
  79     return *this;
  80 }
  81
  82
  83
  84 void wxXmlNode::DoCopy(const wxXmlNode& node)
  85 {
  86     m_type = node.m_type;
  87     m_name = node.m_name;
  88     m_content = node.m_content;
  89     m_children = NULL;
  90
  91     wxXmlNode *n = node.m_children;
  92     while (n)
  93     {
  94         AddChild(new wxXmlNode(*n));
  95         n = n->GetNext();
  96     }
  97
  98     m_properties = NULL;
  99     wxXmlProperty *p = node.m_properties;
 100     while (p)
 101     {
 102        AddProperty(p->GetName(), p->GetValue());
 103        p = p->GetNext();
 104     }
 105 }
 106
 107
 108 bool wxXmlNode::HasProp(const wxString& propName) const
 109 {
 110     wxXmlProperty *prop = GetProperties();
 111
 112     while (prop)
 113     {
 114         if (prop->GetName() == propName) return TRUE;
 115         prop = prop->GetNext();
 116     }
 117
 118     return FALSE;
 119 }
 120
 121
 122
 123 bool wxXmlNode::GetPropVal(const wxString& propName, wxString *value) const
 124 {
 125     wxXmlProperty *prop = GetProperties();
 126
 127     while (prop)
 128     {
 129         if (prop->GetName() == propName)
 130         {
 131             *value = prop->GetValue();
 132             return TRUE;
 133         }
 134         prop = prop->GetNext();
 135     }
 136
 137     return FALSE;
 138 }
 139
 140
 141
 142 wxString wxXmlNode::GetPropVal(const wxString& propName, const wxString& defaultVal) const
 143 {
 144     wxString tmp;
 145     if (GetPropVal(propName, &tmp))
 146         return tmp;
 147     else
 148         return defaultVal;
 149 }
 150
 151
 152
 153 void wxXmlNode::AddChild(wxXmlNode *child)
 154 {
 155     if (m_children == NULL)
 156         m_children = child;
 157     else
 158     {
 159         wxXmlNode *ch = m_children;
 160         while (ch->m_next) ch = ch->m_next;
 161         ch->m_next = child;
 162     }
 163     child->m_next = NULL;
 164     child->m_parent = this;
 165 }
 166
 167
 168
 169 void wxXmlNode::InsertChild(wxXmlNode *child, wxXmlNode *before_node)
 170 {
 171     wxASSERT_MSG(before_node->GetParent() == this, wxT("wxXmlNode::InsertChild - the node has incorrect parent"));
 172
 173     if (m_children == before_node)
 174        m_children = child;
 175     else
 176     {
 177         wxXmlNode *ch = m_children;
 178         while (ch->m_next != before_node) ch = ch->m_next;
 179         ch->m_next = child;
 180     }
 181
 182     child->m_parent = this;
 183     child->m_next = before_node;
 184 }
 185
 186
 187
 188 bool wxXmlNode::RemoveChild(wxXmlNode *child)
 189 {
 190     if (m_children == NULL)
 191         return FALSE;
 192     else if (m_children == child)
 193     {
 194         m_children = child->m_next;
 195         child->m_parent = NULL;
 196         child->m_next = NULL;
 197         return TRUE;
 198     }
 199     else
 200     {
 201         wxXmlNode *ch = m_children;
 202         while (ch->m_next)
 203         {
 204             if (ch->m_next == child)
 205             {
 206                 ch->m_next = child->m_next;
 207                 child->m_parent = NULL;
 208                 child->m_next = NULL;
 209                 return TRUE;
 210             }
 211             ch = ch->m_next;
 212         }
 213         return FALSE;
 214     }
 215 }
 216
 217
 218
 219 void wxXmlNode::AddProperty(const wxString& name, const wxString& value)
 220 {
 221     AddProperty(new wxXmlProperty(name, value, NULL));
 222 }
 223
 224 void wxXmlNode::AddProperty(wxXmlProperty *prop)
 225 {
 226     if (m_properties == NULL)
 227         m_properties = prop;
 228     else
 229     {
 230         wxXmlProperty *p = m_properties;
 231         while (p->GetNext()) p = p->GetNext();
 232         p->SetNext(prop);
 233     }
 234 }
 235
 236
 237
 238 bool wxXmlNode::DeleteProperty(const wxString& name)
 239 {
 240     if (m_properties == NULL)
 241         return FALSE;
 242
 243     else if (m_properties->GetName() == name)
 244     {
 245         wxXmlProperty *prop = m_properties;
 246         m_properties = prop->GetNext();
 247         prop->SetNext(NULL);
 248         delete prop;
 249         return TRUE;
 250     }
 251
 252     else
 253     {
 254         wxXmlProperty *p = m_properties;
 255         while (p->GetNext())
 256         {
 257             if (p->GetNext()->GetName() == name)
 258             {
 259                 wxXmlProperty *prop = p->GetNext();
 260                 p->SetNext(prop->GetNext());
 261                 prop->SetNext(NULL);
 262                 delete prop;
 263                 return TRUE;
 264             }
 265             p = p->GetNext();
 266         }
 267         return FALSE;
 268     }
 269 }
 270
 271
 272
 273
 274
 275
 276
 277
 278 wxList *wxXmlDocument::sm_handlers = NULL;
 279
 280
 281
 282 wxXmlDocument::wxXmlDocument(const wxString& filename, wxXmlIOType io_type)
 283                           : wxObject(), m_root(NULL)
 284 {
 285     if (!Load(filename, io_type))
 286     {
 287         delete m_root;
 288         m_root = NULL;
 289     }
 290 }
 291
 292
 293
 294 wxXmlDocument::wxXmlDocument(wxInputStream& stream, wxXmlIOType io_type)
 295                           : wxObject(), m_root(NULL)
 296 {
 297     if (!Load(stream, io_type))
 298     {
 299         delete m_root;
 300         m_root = NULL;
 301     }
 302 }
 303
 304
 305
 306 wxXmlDocument::wxXmlDocument(const wxXmlDocument& doc)
 307 {
 308     DoCopy(doc);
 309 }
 310
 311
 312
 313 wxXmlDocument& wxXmlDocument::operator=(const wxXmlDocument& doc)
 314 {
 315     delete m_root;
 316     DoCopy(doc);
 317     return *this;
 318 }
 319
 320
 321
 322 void wxXmlDocument::DoCopy(const wxXmlDocument& doc)
 323 {
 324     m_version = doc.m_version;
 325     m_encoding = doc.m_encoding;
 326     m_root = new wxXmlNode(*doc.m_root);
 327 }
 328
 329
 330
 331 bool wxXmlDocument::Load(const wxString& filename, wxXmlIOType io_type)
 332 {
 333     wxFileInputStream stream(filename);
 334     return Load(stream, io_type);
 335 }
 336
 337
 338
 339 bool wxXmlDocument::Load(wxInputStream& stream, wxXmlIOType io_type)
 340 {
 341     wxNode *n = sm_handlers->GetFirst();
 342     while (n)
 343     {
 344         wxXmlIOHandler *h = (wxXmlIOHandler*) n->GetData();
 345
 346         if ((io_type == wxXML_IO_AUTO || io_type == h->GetType()) &&
 347             h->CanLoad(stream))
 348         {
 349             return h->Load(stream, *this);
 350         }
 351         n = n->GetNext();
 352     }
 353     wxLogError(_("Cannot find XML I/O handler capable of loading this format."));
 354     return FALSE;
 355 }
 356
 357
 358
 359 bool wxXmlDocument::Save(const wxString& filename, wxXmlIOType io_type) const
 360 {
 361     wxFileOutputStream stream(filename);
 362     return Save(stream, io_type);
 363 }
 364
 365
 366
 367 bool wxXmlDocument::Save(wxOutputStream& stream, wxXmlIOType io_type) const
 368 {
 369     wxNode *n = sm_handlers->GetFirst();
 370     while (n)
 371     {
 372         wxXmlIOHandler *h = (wxXmlIOHandler*) n->GetData();
 373         if (io_type == h->GetType() && h->CanSave())
 374         {
 375             return h->Save(stream, *this);
 376         }
 377         n = n->GetNext();
 378     }
 379     wxLogError(_("Cannot find XML I/O handler capable of saving in this format."));
 380     return FALSE;
 381 }
 382
 383
 384
 385
 386
 387
 388 void wxXmlDocument::AddHandler(wxXmlIOHandler *handler)
 389 {
 390     if (sm_handlers == NULL)
 391     {
 392         sm_handlers = new wxList;
 393         sm_handlers->DeleteContents(TRUE);
 394     }
 395     sm_handlers->Append(handler);
 396 }
 397
 398
 399 void wxXmlDocument::CleanUpHandlers()
 400 {
 401     delete sm_handlers;
 402     sm_handlers = NULL;
 403 }
 404
 405
 406 void wxXmlDocument::InitStandardHandlers()
 407 {
 408     AddHandler(new wxXmlIOHandlerBin);
 409 #if wxUSE_ZLIB
 410     AddHandler(new wxXmlIOHandlerBinZ);
 411 #endif
 412     AddHandler(new wxXmlIOHandlerExpat);
 413     AddHandler(new wxXmlIOHandlerWriter);
 414 }
 415
 416
 417 #include "wx/module.h"
 418
 419 class wxXmlModule: public wxModule
 420 {
 421     DECLARE_DYNAMIC_CLASS(wxXmlModule)
 422     public:
 423         wxXmlModule() {}
 424         bool OnInit() { wxXmlDocument::InitStandardHandlers(); return TRUE; };
 425         void OnExit() { wxXmlDocument::CleanUpHandlers(); };
 426 };
 427
 428 IMPLEMENT_DYNAMIC_CLASS(wxXmlModule, wxModule)
 429
 430
 431
 432
 433 // When wxXml is loaded dynamically after the application is already running
 434 // then the built-in module system won't pick this one up.  Add it manually.
 435 void wxXmlInitXmlModule()
 436 {
 437     wxModule* module = new wxXmlModule;
 438     module->Init();
 439     wxModule::RegisterModule(module);
 440 }
 441