utils/HelpGen/src/scriptbinder.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        No names yet.
   3 // Purpose:     Contrib. demo
   4 // Author:      Aleksandras Gluchovas
   5 // Modified by:
   6 // Created:     22/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Aleskandars Gluchovas
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef __SCRIPTBINDER_G__
  13 #define __SCRIPTBINDER_G__
  14
  15 #if defined( wxUSE_TEMPLATE_STL )
  16
  17         #include <vector>
  18
  19         #ifdef WIN32
  20                 #include <bstring.h>
  21         #else
  22                 #include <strclass.h>
  23                 #include <string.h>
  24         #endif
  25
  26 #else
  27
  28         #include "wxstlvec.h"
  29         #include "wx/string.h"
  30
  31         // FIXME:: dirty!
  32         typedef wxString string;
  33
  34 #endif
  35
  36 #ifndef ASSERT
  37 // assert yourself
  38 #define ASSERT(x) if (!(x) ) throw;
  39 #endif
  40
  41 #include "markup.h"
  42
  43 // just another portable stream class...
  44
  45 class ScriptStream
  46 {
  47 protected:
  48         char*  mpBuf;
  49         size_t mSize;
  50         size_t mCapacity;
  51 public:
  52         ScriptStream();
  53         ~ScriptStream();
  54
  55         void WriteBytes( const void* srcBuf, size_t count );
  56
  57         ScriptStream& operator<<( const char* str );
  58         ScriptStream& operator<<( const string& str );
  59         ScriptStream& operator<<( char ch );
  60
  61         void endl();
  62
  63         inline char*  GetBuf() { return mpBuf; }
  64         inline size_t GetBufSize() { return mSize; }
  65
  66         // clears current contents of the stream
  67         void Reset() { mSize = 0; }
  68 };
  69
  70
  71 class ScriptTemplate;
  72
  73 // used internally by ScriptTemplate
  74
  75 enum TEMPLATE_VARIABLE_TYPES
  76 {
  77         TVAR_INTEGER,
  78         TVAR_STRING,
  79         TVAR_DOUBLE,
  80         TVAR_REF_ARRAY
  81 };
  82
  83 // helper structures used only by ScriptTemplate
  84
  85 struct TVarInfo
  86 {
  87 public:
  88         const char*             mName;
  89         int                     mType;
  90         int                     mOfs;
  91
  92         TVarInfo( const char* name, int ofs, int varType )
  93                 : mName(name),
  94                   mType( varType ),
  95                   mOfs( ofs )
  96         {}
  97 };
  98
  99 struct TArrayInfo : public TVarInfo
 100 {
 101 public:
 102         int mRefOfs;
 103         int mSizeIntOfs;
 104         int mObjRefTemplOfs;
 105
 106         TArrayInfo( const char* name )
 107                 : TVarInfo( name, 0, TVAR_REF_ARRAY )
 108         {}
 109 };
 110
 111 // stores offset of the given member (of the given class)
 112 // to (*pOfs), though the use of template classes would have
 113 // solved this problem in much clearer fashion
 114
 115 // FOR NOW:: obtaining physical offset of class member
 116 //           does not appeare to be protable across compilers?
 117 // FIXME::   +/- 1 problem
 118
 119 #ifdef __UNIX__
 120         #define WEIRD_OFFSET 1
 121 #else
 122         #define WEIRD_OFFSET 0
 123
 124 #endif
 125
 126 #define GET_VAR_OFS( className, varName, pOfs )          \
 127         {                                                                                                        \
 128                 int* className::* varPtr;                                                \
 129                 varPtr = (int* className::*)&className::varName; \
 130                                                                                                                  \
 131                 (*pOfs) = int(*(int*)&varPtr)-WEIRD_OFFSET;                                      \
 132         }
 133
 134 class ScriptSection;
 135
 136 #if defined( wxUSE_TEMPLATE_STL )
 137
 138         typedef vector<TVarInfo*> TVarListT;
 139
 140         // container class for sections
 141         typedef vector<ScriptSection*> SectListT;
 142
 143 #else
 144
 145         typedef TVarInfo*      TVarInfoPtrT;
 146         typedef ScriptSection* ScriptSectionPtrT;
 147
 148         typedef WXSTL_VECTOR_SHALLOW_COPY(TVarInfoPtrT) TVarListT;
 149
 150         // container class for sections
 151         typedef WXSTL_VECTOR_SHALLOW_COPY(ScriptSectionPtrT) SectListT;
 152
 153 #endif
 154
 155 // class performs preprocessing of arbitrary scripts,
 156 // replaces identifiers enclosed in $(..) tag, whith
 157 // values of the corresponding class member variables
 158
 159 class ScriptTemplate
 160 {
 161 protected:
 162         // do not use string object here - parsing of
 163         // C string can be much faster (in debug v.)
 164         char*     mTText;
 165
 166
 167         TVarListT mVars;
 168
 169         inline void PrintVar( TVarInfo*  pInfo,
 170                                                   void*       dataObj,
 171                                                   ScriptStream& stm );
 172
 173 public:
 174         ScriptTemplate( const string& templateText );
 175         virtual ~ScriptTemplate();
 176
 177         bool HasVar( const char* name );
 178
 179         // Member variables registration methods.
 180
 181         // NOTE:: GET_VAR_OFS() macro should be used
 182         // to get offset of the class member (see #define above)
 183         void AddStringVar ( const char* name, int ofs );
 184         void AddIntegerVar( const char* name, int ofs );
 185         void AddDoubleVar ( const char* name, int ofs );
 186
 187         void AddObjectRefArray( const char*     name,
 188                                                         int                         ofsRefToFirstObj,
 189                                     int                     ofsObjSizeInt,
 190                                                         int                         ofsObjRefTempl
 191                                                   );
 192
 193         // reads the script, replaces $(..) tags with values
 194         // of registered members of dataObj object, and outputs
 195         // the result to given text stream
 196
 197         void PrintScript( void* dataObj, ScriptStream& stm );
 198 };
 199
 200 class ScriptSection;
 201
 202 // class manages section and aggregated sections of
 203 // inter-linked documents
 204
 205 class ScriptSection
 206 {
 207 protected:
 208
 209         // NOTE:: "$(NAME)", $(ID), "$(BODY)" and "$(REFLIST)" aree
 210         //        reseved template variables of ScriptSection
 211
 212         // the below there members are registered to ScriptTemplate,
 213         // GUID within the section tree (numeric)
 214
 215         ScriptSection*  mpParent;
 216         string          mId;   // $(ID)
 217         string          mName; // $(NAME)
 218         string          mBody; // $(BODY)
 219
 220         // NULL, if this section is not aggregated anywhere
 221
 222         SectListT       mSubsections; // aggregated sectons
 223         SectListT       mReferences;  // registered as $(REFLIST)
 224
 225         bool            mAutoHide;  // see autoHide arg, in constructor
 226         bool            mSortOn;    // TRUE, if sort subsectons by naem
 227
 228         // tempalte for this section
 229         ScriptTemplate* mpSectTempl;
 230
 231         // template used for links (or references) to this section
 232         ScriptTemplate* mpRefTempl;
 233
 234         // do not call destructor of this object,
 235         // call RemoveRef() instead
 236         int             mRefCount;
 237
 238         static int      mIdCounter;  // generator of GUIDs
 239
 240         // fields registered and used by ScriptTemplate object
 241         void*           mRefFirst;
 242         int             mArrSize;
 243
 244 protected:
 245         virtual void AddRef();
 246         virtual void RemoveRef();
 247         void DoRemoveEmptySections(int& nRemoved, SectListT& removedLst);
 248         void DoRemoveDeadLinks( SectListT& removedLst);
 249
 250 public:
 251
 252         // NOTE:: pass NULL to certain template, if your sure
 253         //        this kind of template will never be used,
 254         //        e.g. if section is contained but never referrenced,
 255         //        then pReferenceTemplate can be NULL
 256
 257         // if autoHide option is TRUE, the section will be automatically
 258         // collapsed (not shown) if it doesn't contain any references
 259         // to other sections (e.g. could be usefull for autoamically
 260         // hiding empty index-sections).
 261
 262         ScriptSection( const string&   name = "",
 263                                    const string&   body = "",
 264                                    ScriptTemplate* pSectionTemplate   = NULL,
 265                                    ScriptTemplate* pReferenceTemplate = NULL,
 266                                    bool            autoHide           = FALSE,
 267                                    bool            sorted             = FALSE
 268                                  );
 269
 270         // calls RemoveRef() to all aggreagated sections first,
 271         // then to all referenced section - this way all
 272         // sections (even not aggregated ones) become "garbage-collected"
 273
 274         // NOTE:: do not call destructor directlly, call RemoveRef()
 275         //        instead
 276         virtual ~ScriptSection();
 277
 278
 279         // if addToReferencesToo is TRUE, section is aggregated and
 280         // also added to reference list of this section
 281
 282         void AddSection( ScriptSection* pSection, bool addToReferencesToo = FALSE );
 283
 284         // add cross-reference to this given section
 285         void AddReference( ScriptSection* pReferredSection );
 286
 287         // subsection may be given of variable depth level,
 288         // e.g. "publications/reviews/software"
 289
 290         ScriptSection* GetSubsection( const char* name );
 291
 292         // returns list aggregated sections
 293         SectListT& GetSubsections();
 294
 295         // binds reserved template names ( $(..) ) to member
 296         // vairalbes in the ScriptSection class, should be called
 297         // to initialize each user-code provided script template
 298
 299         static void RegisterTemplate( ScriptTemplate& sectionTempalte );
 300
 301         // prints out section tree to the stream, starting from
 302         // this section as a root node
 303         virtual void Print( ScriptStream& stm );
 304
 305         // searches empty sections which has autoHide == TRUE,
 306         // and colapses them (this method should be called )
 307         // on the root-section of the sections tree
 308
 309         // NOTE:: does not work properly, yet!
 310         void RemoveEmptySections();
 311 };
 312
 313 // base class for documnetation generators
 314 // (allows user code set up target script type,
 315 //  independently of documentation type)
 316
 317 class DocGeneratorBase
 318 {
 319 protected:
 320         MarkupTagsT    mTags;
 321
 322         // override this method to do some post processing
 323         // after generation of document, or even write some
 324         // data into output stream, before the section tree
 325         // is flushed into it.
 326
 327         // return FALSE, if something has gone wrong and
 328         // document cannot be saved now
 329
 330         virtual bool OnSaveDocument( ScriptStream& WXUNUSED(stm) )
 331                 { return 1; }
 332
 333         // override this method to provide reference to
 334         // the top section of the document (used as default
 335         // starting section when saving a document)
 336
 337         virtual ScriptSection* GetTopSection()
 338                 { return 0; }
 339
 340 public:
 341
 342         DocGeneratorBase()
 343                 : mTags(0) // no defaul script
 344         {}
 345
 346         // dectrouctors of polymorphic classes SHOULD be virtual
 347         virtual ~DocGeneratorBase() {}
 348
 349         // returns tags, being used for specific target script
 350         MarkupTagsT GetScriptMarkupTags() { return mTags; }
 351
 352         // sets tag array for specific script
 353
 354         // NOTE:: Why virtual? since approach with MarkupTagsT is
 355         //        "flowless" only in theory. Overriding this method
 356         //        allows document generators to check the type of the
 357         //        target script, and perhaps make some modifications
 358         //        to generator's tamplates, to match the specific script
 359
 360         virtual void SetScriptMarkupTags( MarkupTagsT tags )
 361                 { mTags = tags; }
 362
 363         // seves document to file starting from the root-node of
 364         // the document (provided by GetTopSection() method),
 365         // or from "pFromSection" if it's not NULL.
 366
 367         // fopenOptions arg. is string passed to fopen() method,
 368         // returns TRUE, if saving was successfull
 369
 370         virtual bool SaveDocument( const char*    fname,
 371                                                            const char*    fopenOptions = "w",
 372                                                            ScriptSection* pFromSection = NULL
 373                                                            );
 374
 375 };
 376
 377 #endif