# This file is a Tcl script to test out images of type "bitmap" (i.e., # the procedures in the file tkImgBmap.c). It is organized in the # standard fashion for Tcl tests. # # Copyright (c) 1994 The Regents of the University of California. # Copyright (c) 1994-1995 Sun Microsystems, Inc. # Copyright (c) 1998-1999 by Scriptics Corporation. # All rights reserved. # # RCS: @(#) $Id: imgBmap.test,v 1.3 1999/04/16 01:51:38 stanton Exp $ if {[lsearch [namespace children] ::tcltest] == -1} { source [file join [pwd] [file dirname [info script]] defs.tcl] } foreach i [winfo children .] { destroy $i } wm geometry . {} raise . set data1 {#define foo_width 16 #define foo_height 16 #define foo_x_hot 3 #define foo_y_hot 3 static unsigned char foo_bits[] = { 0xff, 0xff, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0xff, 0xff, 0xff, 0xff, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0xff, 0xff}; } set data2 { #define foo2_width 16 #define foo2_height 16 static char foo2_bits[] = { 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff}; } makeFile $data1 foo.bm makeFile $data2 foo2.bm eval image delete [image names] canvas .c pack .c update image create bitmap i1 .c create image 200 100 -image i1 update proc bgerror msg { global errMsg set errMsg $msg } test imageBmap-1.1 {options for bitmap images} { image create bitmap i1 -background #123456 lindex [i1 configure -background] 4 } {#123456} test imageBmap-1.2 {options for bitmap images} { set errMsg {} image create bitmap i1 -background lousy update list $errMsg $errorInfo } {{unknown color name "lousy"} {unknown color name "lousy" (while configuring image "i1")}} test imageBmap-1.3 {options for bitmap images} { image create bitmap i1 -data $data1 lindex [i1 configure -data] 4 } $data1 test imageBmap-1.4 {options for bitmap images} { list [catch {image create bitmap i1 -data bogus} msg] $msg } {1 {format error in bitmap data}} test imageBmap-1.5 {options for bitmap images} { image create bitmap i1 -file foo.bm lindex [i1 configure -file] 4 } foo.bm test imageBmap-1.6 {options for bitmap images} { list [catch {image create bitmap i1 -file bogus} msg] [string tolower $msg] } {1 {couldn't read bitmap file "bogus": no such file or directory}} test imageBmap-1.7 {options for bitmap images} { image create bitmap i1 -foreground #00ff00 lindex [i1 configure -foreground] 4 } {#00ff00} test imageBmap-1.8 {options for bitmap images} { set errMsg {} image create bitmap i1 -foreground bad_color update list $errMsg $errorInfo } {{unknown color name "bad_color"} {unknown color name "bad_color" (while configuring image "i1")}} test imageBmap-1.9 {options for bitmap images} { image create bitmap i1 -data $data1 -maskdata $data2 lindex [i1 configure -maskdata] 4 } $data2 test imageBmap-1.10 {options for bitmap images} { list [catch {image create bitmap i1 -data $data1 -maskdata bogus} msg] $msg } {1 {format error in bitmap data}} test imageBmap-1.11 {options for bitmap images} { image create bitmap i1 -file foo.bm -maskfile foo2.bm lindex [i1 configure -maskfile] 4 } foo2.bm test imageBmap-1.12 {options for bitmap images} { list [catch {image create bitmap i1 -data $data1 -maskfile bogus} msg] \ [string tolower $msg] } {1 {couldn't read bitmap file "bogus": no such file or directory}} rename bgerror {} test imageBmap-2.1 {ImgBmapCreate procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap -gorp dum} msg] $msg [image names] } {1 {unknown option "-gorp"} {}} test imageBmap-2.2 {ImgBmapCreate procedure} { eval image delete [image names] .c delete all image create bitmap image1 list [info commands image1] [image names] \ [image width image1] [image height image1] \ [lindex [image1 configure -foreground] 4] \ [lindex [image1 configure -background] 4] } {image1 image1 0 0 #000000 {}} test imageBmap-3.1 {ImgBmapConfigureMaster procedure, memory de-allocation} { image create bitmap i1 -data $data1 i1 configure -data $data1 } {} test imageBmap-3.2 {ImgBmapConfigureMaster procedure} { image create bitmap i1 -data $data1 list [catch {i1 configure -data bogus} msg] $msg [image width i1] \ [image height i1] } {1 {format error in bitmap data} 16 16} test imageBmap-3.3 {ImgBmapConfigureMaster procedure, memory de-allocation} { image create bitmap i1 -data $data1 -maskdata $data2 i1 configure -maskdata $data2 } {} test imageBmap-3.4 {ImgBmapConfigureMaster procedure} { image create bitmap i1 list [catch {i1 configure -maskdata $data2} msg] $msg } {1 {can't have mask without bitmap}} test imageBmap-3.5 {ImgBmapConfigureMaster procedure} { list [catch {image create bitmap i1 -data $data1 -maskdata { #define foo_width 8 #define foo_height 16 static char foo_bits[] = { 0xff, 0xff, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0xff, 0xff, 0xff, 0xff, 0x81, 0x81}; } } msg] $msg } {1 {bitmap and mask have different sizes}} test imageBmap-3.6 {ImgBmapConfigureMaster procedure} { list [catch {image create bitmap i1 -data $data1 -maskdata { #define foo_width 16 #define foo_height 8 static char foo_bits[] = { 0xff, 0xff, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0xff, 0xff, 0xff, 0xff, 0x81, 0x81}; } } msg] $msg } {1 {bitmap and mask have different sizes}} test imageBmap-3.7 {ImgBmapConfigureMaster procedure} { image create bitmap i1 -data $data1 .c create image 100 100 -image i1 -tags i1.1 -anchor nw .c create image 200 100 -image i1 -tags i1.2 -anchor nw update i1 configure -data { #define foo2_height 14 #define foo2_width 15 static char foo2_bits[] = { 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff}; } update list [image width i1] [image height i1] [.c bbox i1.1] [.c bbox i1.2] } {15 14 {100 100 115 114} {200 100 215 114}} test imageBmap-4.1 {ImgBmapConfigureInstance procedure: check error handling} { proc bgerror args {} .c delete all image create bitmap i1 -file foo.bm .c create image 100 100 -image i1 update i1 configure -foreground bogus update } {} test imageBmap-5.1 {GetBitmapData procedure} { list [catch {image create bitmap -file ~bad_user/a/b} msg] \ [string tolower $msg] } {1 {user "bad_user" doesn't exist}} test imageBmap-5.2 {GetBitmapData procedure} { list [catch {image create bitmap -file bad_name} msg] [string tolower $msg] } {1 {couldn't read bitmap file "bad_name": no such file or directory}} test imageBmap-5.3 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap -data { }} msg] $msg } {1 {format error in bitmap data}} test imageBmap-5.4 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap -data {#define foo2_width}} msg] $msg } {1 {format error in bitmap data}} test imageBmap-5.5 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap -data {#define foo2_width gorp}} msg] $msg } {1 {format error in bitmap data}} test imageBmap-5.6 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap -data {#define foo2_width 1.4}} msg] $msg } {1 {format error in bitmap data}} test imageBmap-5.7 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap -data {#define foo2_height}} msg] $msg } {1 {format error in bitmap data}} test imageBmap-5.8 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap -data {#define foo2_height gorp}} msg] $msg } {1 {format error in bitmap data}} test imageBmap-5.9 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap -data {#define foo2_height 1.4}} msg] $msg } {1 {format error in bitmap data}} test imageBmap-5.10 {GetBitmapData procedure} { eval image delete [image names] .c delete all image create bitmap i1 -data { #define foo2_height 14 #define foo2_width 15 xx _widtg 18 xwidth 18 _heighz 18 xheight 18 static char foo2_bits[] = { 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff}; } list [image width i1] [image height i1] } {15 14} test imageBmap-5.11 {GetBitmapData procedure} { eval image delete [image names] .c delete all image create bitmap i1 -data { _height 14 _width 15 char { 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff} } list [image width i1] [image height i1] } {15 14} test imageBmap-5.12 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap i1 -data { #define foo2_height 14 #define foo2_width 15 static short foo2_bits[] = { 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff}; }} msg] $msg } {1 {format error in bitmap data; looks like it's an obsolete X10 bitmap file}} test imageBmap-5.13 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap i1 -data { #define foo2_height 16 #define foo2_width 16 static char foo2_bits[] = 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff; }} msg] $msg } {1 {format error in bitmap data}} test imageBmap-5.14 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap i1 -data { #define foo2_width 16 static char foo2_bits[] = { 0xff, 0xff, 0xff, }}} msg] $msg } {1 {format error in bitmap data}} test imageBmap-5.15 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap i1 -data { #define foo2_height 16 static char foo2_bits[] = { 0xff, 0xff, 0xff, }}} msg] $msg } {1 {format error in bitmap data}} test imageBmap-5.16 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap i1 -data { #define foo2_height 16 #define foo2_width 16 static char foo2_bits[] = { 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, foo}; }} msg] $msg } {1 {format error in bitmap data}} test imageBmap-5.17 {GetBitmapData procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap i1 -data " #define foo2_height 16 #define foo2_width 16 static char foo2_bits[] = \{ 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff, 0x81, 0xff "} msg] $msg } {1 {format error in bitmap data}} test imageBmap-6.1 {NextBitmapWord procedure} { eval image delete [image names] .c delete all list [catch {image create bitmap i1 -data {1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890}} msg] $msg } {1 {format error in bitmap data}} test imageBmap-6.2 {NextBitmapWord procedure} { eval image delete [image names] .c delete all makeFile {1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890} foo3.bm list [catch {image create bitmap i1 -file foo3.bm} msg] $msg } {1 {format error in bitmap data}} test imageBmap-6.3 {NextBitmapWord procedure} { eval image delete [image names] .c delete all makeFile { } foo3.bm list [catch {image create bitmap i1 -file foo3.bm} msg] $msg } {1 {format error in bitmap data}} removeFile foo3.bm eval image delete [image names] .c delete all image create bitmap i1 test imageBmap-7.1 {ImgBmapCmd procedure} { list [catch {i1} msg] $msg } {1 {wrong # args: should be "i1 option ?arg arg ...?"}} test imageBmap-7.2 {ImgBmapCmd procedure, "cget" option} { list [catch {i1 cget} msg] $msg } {1 {wrong # args: should be "i1 cget option"}} test imageBmap-7.3 {ImgBmapCmd procedure, "cget" option} { list [catch {i1 cget a b} msg] $msg } {1 {wrong # args: should be "i1 cget option"}} test imageBmap-7.4 {ImgBmapCmd procedure, "cget" option} { i1 co -foreground #123456 i1 cget -foreground } {#123456} test imageBmap-7.5 {ImgBmapCmd procedure, "cget" option} { list [catch {i1 cget -stupid} msg] $msg } {1 {unknown option "-stupid"}} test imageBmap-7.6 {ImgBmapCmd procedure} { llength [i1 configure] } {6} test imageBmap-7.7 {ImgBmapCmd procedure} { i1 co -foreground #001122 i1 configure -foreground } {-foreground {} {} #000000 #001122} test imageBmap-7.8 {ImgBmapCmd procedure} { list [catch {i1 configure -gorp} msg] $msg } {1 {unknown option "-gorp"}} test imageBmap-7.9 {ImgBmapCmd procedure} { list [catch {i1 configure -foreground #221100 -background} msg] $msg } {1 {value for "-background" missing}} test imageBmap-7.10 {ImgBmapCmd procedure} { list [catch {i1 gorp} msg] $msg } {1 {bad option "gorp": must be cget or configure}} test imageBmap-8.1 {ImgBmapGet/Free procedures, shared instances} { eval image delete [image names] .c delete all image create bitmap i1 -data $data1 .c create image 50 100 -image i1 -tags i1.1 .c create image 150 100 -image i1 -tags i1.2 .c create image 250 100 -image i1 -tags i1.3 update .c delete i1.1 i1 configure -background black update .c delete i1.2 i1 configure -background white update .c delete i1.3 i1 configure -background black update image delete i1 } {} test imageBmap-9.1 {ImgBmapDisplay procedure, nothing to display} { proc bgerror args {} eval image delete [image names] .c delete all image create bitmap i1 -data $data1 .c create image 50 100 -image i1 -tags i1.1 i1 configure -data {} update } {} test imageBmap-9.2 {ImgBmapDisplay procedure, nothing to display} { proc bgerror args {} eval image delete [image names] .c delete all image create bitmap i1 -data $data1 .c create image 50 100 -image i1 -tags i1.1 i1 configure -foreground bogus update } {} if {[info exists bgerror]} { rename bgerror {} } test imageBmap-10.1 {ImgBmapFree procedure, resource freeing} { eval image delete [image names] .c delete all image create bitmap i1 -data $data1 -maskdata $data2 -foreground #112233 \ -background #445566 .c create image 100 100 -image i1 update .c delete all image delete i1 } {} test imageBmap-10.2 {ImgBmapFree procedures, unlinking} { eval image delete [image names] .c delete all image create bitmap i1 -data $data1 -maskdata $data2 -foreground #112233 \ -background #445566 .c create image 100 100 -image i1 button .b1 -image i1 button .b2 -image i1 button .b3 -image i1 pack .b1 .b2 .b3 update destroy .b2 update destroy .b3 update destroy .b1 update .c delete all } {} test imageBmap-11.1 {ImgBmapDelete procedure} { image create bitmap i2 -file foo.bm -maskfile foo2.bm image delete i2 info command i2 } {} test imageBmap-11.2 {ImgBmapDelete procedure} { image create bitmap i2 -file foo.bm -maskfile foo2.bm rename i2 newi2 set x [list [info command i2] [info command new*] [newi2 cget -file]] image delete i2 lappend x [info command new*] } {{} newi2 foo.bm {}} test imageBmap-12.1 {ImgBmapCmdDeletedProc procedure} { image create bitmap i2 -file foo.bm -maskfile foo2.bm rename i2 {} list [lsearch -exact [image names] i2] [catch {i2 foo} msg] $msg } {-1 1 {invalid command name "i2"}} removeFile foo.bm removeFile foo2.bm destroy .c eval image delete [image names] # cleanup ::tcltest::cleanupTests return 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 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#include "template.h"

#include <stdio.h>
#include <stdarg.h>

#include <qlist.h>
#include <qarray.h>
#include <qdict.h>
#include <qstrlist.h>
#include <qvaluelist.h>
#include <qstack.h>
#include <qfile.h>
#include <qregexp.h>

#include "sortdict.h"
#include "ftextstream.h"
#include "message.h"
#include "util.h"

#define ENABLE_TRACING 0

#if ENABLE_TRACING
#define TRACE(x) printf x
#else
#define TRACE(x)
#endif

class TemplateToken;

//-------------------------------------------------------------------

static QValueList<QCString> split(const QCString &str,const QCString &sep,
                                  bool allowEmptyEntries=FALSE,bool cleanup=TRUE)
{
  QValueList<QCString> lst;

  int j = 0;
  int i = str.find( sep, j );

  while (i!=-1)
  {
    if ( str.mid(j,i-j).length() > 0 )
    {
      if (cleanup)
      {
        lst.append(str.mid(j,i-j).stripWhiteSpace());
      }
      else
      {
        lst.append(str.mid(j,i-j));
      }
    }
    else if (allowEmptyEntries)
    {
      lst.append("");
    }
    j = i + sep.length();
    i = str.find(sep,j);
  }

  int l = str.length() - 1;
  if (str.mid(j,l-j+1).length()>0)
  {
    if (cleanup)
    {
      lst.append(str.mid(j,l-j+1).stripWhiteSpace());
    }
    else
    {
      lst.append(str.mid(j,l-j+1));
    }
  }
  else if (allowEmptyEntries)
  {
    lst.append("");
  }

  return lst;
}

//----------------------------------------------------------------------------

#if ENABLE_TRACING
static QCString replace(const char *s,char csrc,char cdst)
{
  QCString result = s;
  for (char *p=result.data();*p;p++)
  {
    if (*p==csrc) *p=cdst;
  }
  return result;
}
#endif

//- TemplateVariant implementation -------------------------------------------

/** @brief Private data of a template variant object */
class TemplateVariant::Private
{
  public:
    Private() : raw(FALSE) {}
    Type                type;
    int                 intVal;
    QCString            strVal;
    bool                boolVal;
    TemplateStructIntf *strukt;
    TemplateListIntf   *list;
    Delegate            delegate;
    bool                raw;
};

TemplateVariant::TemplateVariant()
{
  p = new Private;
  p->type=None;
}

TemplateVariant::TemplateVariant(bool b)
{
  p = new Private;
  p->type = Bool;
  p->boolVal = b;
}

TemplateVariant::TemplateVariant(int v)
{
  p = new Private;
  p->type = Integer;
  p->intVal = v;
}

TemplateVariant::TemplateVariant(const char *s,bool raw)
{
  p = new Private;
  p->type = String;
  p->strVal = s;
  p->raw = raw;
}

TemplateVariant::TemplateVariant(const QCString &s,bool raw)
{
  p = new Private;
  p->type = String;
  p->strVal = s;
  p->raw = raw;
}

TemplateVariant::TemplateVariant(TemplateStructIntf *s)
{
  p = new Private;
  p->type = Struct;
  p->strukt = s;
  p->strukt->addRef();
}

TemplateVariant::TemplateVariant(TemplateListIntf *l)
{
  p = new Private;
  p->type = List;
  p->list = l;
  p->list->addRef();
}

TemplateVariant::TemplateVariant(const TemplateVariant::Delegate &delegate)
{
  p = new Private;
  p->type = Function;
  p->delegate = delegate;
}

TemplateVariant::~TemplateVariant()
{
  if (p->type==Struct) p->strukt->release();
  else if (p->type==List) p->list->release();
  delete p;
}

TemplateVariant::TemplateVariant(const TemplateVariant &v)
{
  p = new Private;
  p->type    = v.p->type;
  p->raw     = v.p->raw;
  switch (p->type)
  {
    case None: break;
    case Bool:     p->boolVal = v.p->boolVal; break;
    case Integer:  p->intVal  = v.p->intVal;  break;
    case String:   p->strVal  = v.p->strVal;  break;
    case Struct:   p->strukt  = v.p->strukt;  p->strukt->addRef(); break;
    case List:     p->list    = v.p->list;    p->list->addRef();   break;
    case Function: p->delegate= v.p->delegate;break;
  }
}

TemplateVariant &TemplateVariant::operator=(const TemplateVariant &v)
{
  // assignment can change the type of the variable, so we have to be
  // careful with reference counted content.
  TemplateStructIntf *tmpStruct = p->type==Struct ? p->strukt : 0;
  TemplateListIntf   *tmpList   = p->type==List   ? p->list   : 0;
  Type tmpType = p->type;

  p->type    = v.p->type;
  p->raw     = v.p->raw;
  switch (p->type)
  {
    case None: break;
    case Bool:     p->boolVal = v.p->boolVal; break;
    case Integer:  p->intVal  = v.p->intVal;  break;
    case String:   p->strVal  = v.p->strVal;  break;
    case Struct:   p->strukt  = v.p->strukt;  p->strukt->addRef(); break;
    case List:     p->list    = v.p->list;    p->list->addRef();   break;
    case Function: p->delegate= v.p->delegate;break;
  }

  // release overwritten reference counted values
  if      (tmpType==Struct && tmpStruct) tmpStruct->release();
  else if (tmpType==List   && tmpList  ) tmpList->release();
  return *this;
}

QCString TemplateVariant::toString() const
{
  QCString result;
  switch (p->type)
  {
    case None:
      break;
    case Bool:
      result=p->boolVal ? "true" : "false";
      break;
    case Integer:
      result=QCString().setNum(p->intVal);
      break;
    case String:
      result=p->strVal;
      break;
    case Struct:
      result="[struct]";
      break;
    case List:
      result="[list]";
      break;
    case Function:
      result="[function]";
      break;
  }
  return result;
}

bool TemplateVariant::toBool() const
{
  bool result=FALSE;
  switch (p->type)
  {
    case None:
      break;
    case Bool:
      result = p->boolVal;
      break;
    case Integer:
      result = p->intVal!=0;
      break;
    case String:
      result = !p->strVal.isEmpty(); // && p->strVal!="false" && p->strVal!="0";
      break;
    case Struct:
      result = TRUE;
      break;
    case List:
      result = p->list->count()!=0;
      break;
    case Function:
      result = FALSE;
      break;
  }
  return result;
}

int TemplateVariant::toInt() const
{
  int result=0;
  switch (p->type)
  {
    case None:
      break;
    case Bool:
      result = p->boolVal ? 1 : 0;
      break;
    case Integer:
      result = p->intVal;
      break;
    case String:
      result = p->strVal.toInt();
      break;
    case Struct:
      break;
    case List:
      result = p->list->count();
      break;
    case Function:
      result = 0;
      break;
  }
  return result;
}

TemplateStructIntf *TemplateVariant::toStruct() const
{
  return p->type==Struct ? p->strukt : 0;
}

TemplateListIntf *TemplateVariant::toList() const
{
  return p->type==List ? p->list : 0;
}

TemplateVariant TemplateVariant::call(const QValueList<TemplateVariant> &args)
{
  if (p->type==Function) return p->delegate(args);
  return TemplateVariant();
}

bool TemplateVariant::operator==(TemplateVariant &other)
{
  if (p->type==None)
  {
    return FALSE;
  }
  if (p->type==TemplateVariant::List && other.p->type==TemplateVariant::List)
  {
    return p->list==other.p->list; // TODO: improve me
  }
  else if (p->type==TemplateVariant::Struct && other.p->type==TemplateVariant::Struct)
  {
    return p->strukt==other.p->strukt; // TODO: improve me
  }
  else
  {
    return toString()==other.toString();
  }
}

TemplateVariant::Type TemplateVariant::type() const
{
  return p->type;
}

bool TemplateVariant::isValid() const
{
  return p->type!=None;
}

void TemplateVariant::setRaw(bool b)
{
  p->raw = b;
}

bool TemplateVariant::raw() const
{
  return p->raw;
}

//- Template struct implementation --------------------------------------------


/** @brief Private data of a template struct object */
class TemplateStruct::Private
{
  public:
    Private() : fields(17), refCount(0)
    { fields.setAutoDelete(TRUE); }
    QDict<TemplateVariant> fields;
    int refCount;
};

TemplateStruct::TemplateStruct()
{
  p = new Private;
}

TemplateStruct::~TemplateStruct()
{
  delete p;
}

int TemplateStruct::addRef()
{
  return ++p->refCount;
}

int TemplateStruct::release()
{
  int count = --p->refCount;
  if (count<=0)
  {
    delete this;
  }
  return count;
}

void TemplateStruct::set(const char *name,const TemplateVariant &v)
{
  TemplateVariant *pv = p->fields.find(name);
  if (pv) // change existing field
  {
    *pv = v;
  }
  else // insert new field
  {
    p->fields.insert(name,new TemplateVariant(v));
  }
}

TemplateVariant TemplateStruct::get(const char *name) const
{
  TemplateVariant *v = p->fields.find(name);
  return v ? *v : TemplateVariant();
}

TemplateStruct *TemplateStruct::alloc()
{
  return new TemplateStruct;
}

//- Template list implementation ----------------------------------------------


/** @brief Private data of a template list object */
class TemplateList::Private
{
  public:
    Private() : index(-1), refCount(0) {}
    QValueList<TemplateVariant> elems;
    int index;
    int refCount;
};


TemplateList::TemplateList()
{
  p = new Private;
}

TemplateList::~TemplateList()
{
  delete p;
}

int TemplateList::addRef()
{
  return ++p->refCount;
}

int TemplateList::release()
{
  int count = --p->refCount;
  if (count<=0)
  {
    delete this;
  }
  return count;
}

int TemplateList::count() const
{
  return p->elems.count();
}

void TemplateList::append(const TemplateVariant &v)
{
  p->elems.append(v);
}

// iterator support
class TemplateListConstIterator : public TemplateListIntf::ConstIterator
{
  public:
    TemplateListConstIterator(const TemplateList &l) : m_list(l) { m_index=-1; }
    virtual ~TemplateListConstIterator() {}
    virtual void toFirst()
    {
      m_it = m_list.p->elems.begin();
      m_index=0;
    }
    virtual void toLast()
    {
      m_it = m_list.p->elems.fromLast();
      m_index=m_list.count()-1;
    }
    virtual void toNext()
    {
      if (m_it!=m_list.p->elems.end())
      {
        ++m_it;
        ++m_index;
      }
    }
    virtual void toPrev()
    {
      if (m_index>0)
      {
        --m_it;
        --m_index;
      }
      else
      {
        m_index=-1;
      }
    }
    virtual bool current(TemplateVariant &v) const
    {
      if (m_index<0 || m_it==m_list.p->elems.end())
      {
        v = TemplateVariant();
        return FALSE;
      }
      else
      {
        v = *m_it;
        return TRUE;
      }
    }
  private:
    const TemplateList &m_list;
    QValueList<TemplateVariant>::ConstIterator m_it;
    int m_index;
};

TemplateListIntf::ConstIterator *TemplateList::createIterator() const
{
  return new TemplateListConstIterator(*this);
}

TemplateVariant TemplateList::at(int index) const
{
  if (index>=0 && index<(int)p->elems.count())
  {
    return p->elems[index];
  }
  else
  {
    return TemplateVariant();
  }
}

TemplateList *TemplateList::alloc()
{
  return new TemplateList;
}

//- Operator types ------------------------------------------------------------

/** @brief Class representing operators that can appear in template expressions */
class Operator
{
  public:
      /* Operator precedence (low to high)
         or
         and
         not
         in
         ==, !=, <, >, <=, >=
         +, -
         *, /, %
         |
         :
         ,
       */
    enum Type
    {
      Or, And, Not, In, Equal, NotEqual, Less, Greater, LessEqual,
      GreaterEqual, Plus, Minus, Multiply, Divide, Modulo, Filter, Colon, Comma,
      LeftParen, RightParen,
      Last
    };

    static const char *toString(Type op)
    {
      switch(op)
      {
        case Or:           return "or";
        case And:          return "and";
        case Not:          return "not";
        case In:           return "in";
        case Equal:        return "==";
        case NotEqual:     return "!=";
        case Less:         return "<";
        case Greater:      return ">";
        case LessEqual:    return "<=";
        case GreaterEqual: return ">=";
        case Plus:         return "+";
        case Minus:        return "-";
        case Multiply:     return "*";
        case Divide:       return "/";
        case Modulo:       return "%";
        case Filter:       return "|";
        case Colon:        return ":";
        case Comma:        return ",";
        case LeftParen:    return "(";
        case RightParen:   return ")";
        case Last:         return "?";
      }
      return "?";
    }
};

//-----------------------------------------------------------------------------

class TemplateNodeBlock;

/** @brief Class holding stacks of blocks available in the context */
class TemplateBlockContext
{
  public:
    TemplateBlockContext();
    TemplateNodeBlock *get(const QCString &name) const;
    TemplateNodeBlock *pop(const QCString &name) const;
    void add(TemplateNodeBlock *block);
    void add(TemplateBlockContext *ctx);
    void push(TemplateNodeBlock *block);
    void clear();
  private:
    QDict< QList<TemplateNodeBlock> > m_blocks;
};

/** @brief A container to store a key-value pair */
struct TemplateKeyValue
{
  TemplateKeyValue() {}
  TemplateKeyValue(const QCString &k,const TemplateVariant &v) : key(k), value(v) {}
  QCString key;
  TemplateVariant value;
};

/** @brief Internal class representing the implementation of a template
 *  context */
class TemplateContextImpl : public TemplateContext
{
  public:
    TemplateContextImpl(const TemplateEngine *e);
    virtual ~TemplateContextImpl();

    // TemplateContext methods
    void push();
    void pop();
    void set(const char *name,const TemplateVariant &v);
    TemplateVariant get(const QCString &name) const;
    const TemplateVariant *getRef(const QCString &name) const;
    void setOutputDirectory(const QCString &dir)
    { m_outputDir = dir; }
    void setEscapeIntf(const QCString &ext,TemplateEscapeIntf *intf)
    {
      int i=(!ext.isEmpty() && ext.at(0)=='.') ? 1 : 0;
      m_escapeIntfDict.insert(ext.mid(i),new TemplateEscapeIntf*(intf));
    }
    void selectEscapeIntf(const QCString &ext)
    { TemplateEscapeIntf **ppIntf = m_escapeIntfDict.find(ext);
      m_activeEscapeIntf = ppIntf ? *ppIntf : 0;
    }
    void setActiveEscapeIntf(TemplateEscapeIntf *intf) { m_activeEscapeIntf = intf; }
    void setSpacelessIntf(TemplateSpacelessIntf *intf) { m_spacelessIntf = intf; }

    // internal methods
    TemplateBlockContext *blockContext();
    TemplateVariant getPrimary(const QCString &name) const;
    void setLocation(const QCString &templateName,int line)
    { m_templateName=templateName; m_line=line; }
    QCString templateName() const                { return m_templateName; }
    int line() const                             { return m_line; }
    QCString outputDirectory() const             { return m_outputDir; }
    TemplateEscapeIntf *escapeIntf() const       { return m_activeEscapeIntf; }
    TemplateSpacelessIntf *spacelessIntf() const { return m_spacelessIntf; }
    void enableSpaceless(bool b)                 { m_spacelessEnabled=b; }
    bool spacelessEnabled() const                { return m_spacelessEnabled && m_spacelessIntf; }
    void warn(const char *fileName,int line,const char *fmt,...) const;

    // index related functions
    void openSubIndex(const QCString &indexName);
    void closeSubIndex(const QCString &indexName);
    void addIndexEntry(const QCString &indexName,const QValueList<TemplateKeyValue> &arguments);

  private:
    const TemplateEngine *m_engine;
    QCString m_templateName;
    int m_line;
    QCString m_outputDir;
    QList< QDict<TemplateVariant> > m_contextStack;
    TemplateBlockContext m_blockContext;
    QDict<TemplateEscapeIntf*> m_escapeIntfDict;
    TemplateEscapeIntf *m_activeEscapeIntf;
    TemplateSpacelessIntf *m_spacelessIntf;
    bool m_spacelessEnabled;
    TemplateAutoRef<TemplateStruct> m_indices;
    QDict< QStack<TemplateVariant> > m_indexStacks;
};

//-----------------------------------------------------------------------------

/** @brief The implementation of the "add" filter */
class FilterAdd
{
  public:
    static int variantIntValue(const TemplateVariant &v,bool &isInt)
    {
      isInt = v.type()==TemplateVariant::Integer;
      if (!isInt && v.type()==TemplateVariant::String)
      {
        return v.toString().toInt(&isInt);
      }
      return isInt ? v.toInt() : 0;
    }
    static TemplateVariant apply(const TemplateVariant &v,const TemplateVariant &arg)
    {
      if (!v.isValid())
      {
        return arg;
      }
      bool lhsIsInt;
      int  lhsValue = variantIntValue(v,lhsIsInt);
      bool rhsIsInt;
      int  rhsValue = variantIntValue(arg,rhsIsInt);
      if (lhsIsInt && rhsIsInt)
      {
        return lhsValue+rhsValue;
      }
      else if (v.type()==TemplateVariant::String && arg.type()==TemplateVariant::String)
      {
        return TemplateVariant(v.toString() + arg.toString());
      }
      else
      {
        return v;
      }
    }
};

//-----------------------------------------------------------------------------

/** @brief The implementation of the "prepend" filter */
class FilterPrepend
{
  public:
    static TemplateVariant apply(const TemplateVariant &v,const TemplateVariant &arg)
    {
      if (v.type()==TemplateVariant::String && arg.type()==TemplateVariant::String)
      {
        return TemplateVariant(arg.toString() + v.toString());
      }
      else
      {
        return v;
      }
    }
};

//--------------------------------------------------------------------

/** @brief The implementation of the "length" filter */
class FilterLength
{
  public:
    static TemplateVariant apply(const TemplateVariant &v,const TemplateVariant &)
    {
      if (!v.isValid())
      {
        return TemplateVariant();
      }
      if (v.type()==TemplateVariant::List)
      {
        return TemplateVariant(v.toList()->count());
      }
      else if (v.type()==TemplateVariant::String)
      {
        return TemplateVariant((int)v.toString().length());
      }
      else
      {
        return TemplateVariant();
      }
    }
};

//--------------------------------------------------------------------

/** @brief The implementation of the "default" filter */
class FilterDefault
{
  public:
    static TemplateVariant apply(const TemplateVariant &v,const TemplateVariant &arg)
    {
      if (!v.isValid())
      {
        return arg;
      }
      else if (v.type()==TemplateVariant::String && v.toString().isEmpty())
      {
        return arg;
      }
      else
      {
        return v;
      }
    }
};

//--------------------------------------------------------------------

/** @brief The implementation of the "default" filter */
class FilterStripPath
{
  public:
    static TemplateVariant apply(const TemplateVariant &v,const TemplateVariant &)
    {
      if (!v.isValid() || v.type()!=TemplateVariant::String)
      {
        return v;
      }
      QCString result = v.toString();
      int i=result.findRev('/');
      if (i!=-1)
      {
        result=result.mid(i+1);
      }
      i=result.findRev('\\');
      if (i!=-1)
      {
        result=result.mid(i+1);
      }
      return result;
    }
};

//--------------------------------------------------------------------

/** @brief The implementation of the "default" filter */
class FilterNoWrap
{
  public:
    static TemplateVariant apply(const TemplateVariant &v,const TemplateVariant &)
    {
      if (!v.isValid() || v.type()!=TemplateVariant::String)
      {
        return v;
      }
      QCString s = v.toString();
      return substitute(s," ","&#160;");
    }
};

//--------------------------------------------------------------------

/** @brief The implementation of the "divisibleby" filter */
class FilterDivisibleBy
{
  public:
    static TemplateVariant apply(const TemplateVariant &v,const TemplateVariant &n)
    {
      if (!v.isValid() || !n.isValid())
      {
        return TemplateVariant();
      }
      if (v.type()==TemplateVariant::Integer && n.type()==TemplateVariant::Integer)
      {
        return TemplateVariant((v.toInt()%n.toInt())==0);
      }
      else
      {
        return TemplateVariant();
      }
    }
};


//--------------------------------------------------------------------

/** @brief Factory singleton for registering and creating filters */
class TemplateFilterFactory
{
  public:
    typedef TemplateVariant (FilterFunction)(const TemplateVariant &v,const TemplateVariant &arg);

    static TemplateFilterFactory *instance()
    {
      static TemplateFilterFactory *instance = 0;
      if (instance==0) instance = new TemplateFilterFactory;
      return instance;
    }

    TemplateVariant apply(const QCString &name,const TemplateVariant &v,const TemplateVariant &arg, bool &ok)
    {
      FilterFunction *func = (FilterFunction*)m_registry.find(name);
      if (func)
      {
        ok=TRUE;
        return (*func)(v,arg);
      }
      else
      {
        ok=FALSE;
        return v;
      }
    }

    void registerFilter(const QCString &name,FilterFunction *func)
    {
      m_registry.insert(name,(void*)func);
    }

    /** @brief Helper class for registering a filter function */
    template<class T> class AutoRegister
    {
      public:
        AutoRegister<T>(const QCString &key)
        {
          TemplateFilterFactory::instance()->registerFilter(key,&T::apply);
        }
    };

  private:
    QDict<void> m_registry;
};

// register a handlers for each filter we support
static TemplateFilterFactory::AutoRegister<FilterAdd>         fAdd("add");
static TemplateFilterFactory::AutoRegister<FilterAdd>         fAppend("append");
static TemplateFilterFactory::AutoRegister<FilterLength>      fLength("length");
static TemplateFilterFactory::AutoRegister<FilterNoWrap>      fNoWrap("nowrap");
static TemplateFilterFactory::AutoRegister<FilterDefault>     fDefault("default");
static TemplateFilterFactory::AutoRegister<FilterPrepend>     fPrepend("prepend");
static TemplateFilterFactory::AutoRegister<FilterStripPath>   fStripPath("stripPath");
static TemplateFilterFactory::AutoRegister<FilterDivisibleBy> fDivisibleBy("divisibleby");

//--------------------------------------------------------------------

/** @brief Base class for all nodes in the abstract syntax tree of an
 *  expression.
 */
class ExprAst
{
  public:
    virtual ~ExprAst() {}
    virtual TemplateVariant resolve(TemplateContext *) { return TemplateVariant(); }
};

/** @brief Class representing a number in the AST */
class ExprAstNumber : public ExprAst
{
  public:
    ExprAstNumber(int num) : m_number(num)
    { TRACE(("ExprAstNumber(%d)\n",num)); }
    int number() const { return m_number; }
    virtual TemplateVariant resolve(TemplateContext *) { return TemplateVariant(m_number); }
  private:
    int m_number;
};

/** @brief Class representing a variable in the AST */
class ExprAstVariable : public ExprAst
{
  public:
    ExprAstVariable(const char *name) : m_name(name)
    { TRACE(("ExprAstVariable(%s)\n",name)); }
    const QCString &name() const { return m_name; }
    virtual TemplateVariant resolve(TemplateContext *c)
    {
      TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
      TemplateVariant v = c->get(m_name);
      if (!v.isValid())
      {
        ci->warn(ci->templateName(),ci->line(),"undefined variable '%s' in expression",m_name.data());
      }
      return v;
    }
  private:
    QCString m_name;
};

class ExprAstFunctionVariable : public ExprAst
{
  public:
    ExprAstFunctionVariable(ExprAst *var,const QList<ExprAst> &args)
      : m_var(var), m_args(args)
    { TRACE(("ExprAstFunctionVariable()\n"));
      m_args.setAutoDelete(TRUE);
    }
    virtual TemplateVariant resolve(TemplateContext *c)
    {
      QValueList<TemplateVariant> args;
      for (uint i=0;i<m_args.count();i++)
      {
        TemplateVariant v = m_args.at(i)->resolve(c);
        args.append(v);
      }
      TemplateVariant v = m_var->resolve(c);
      if (v.type()==TemplateVariant::Function)
      {
        v = v.call(args);
      }
      return v;
    }
  private:
    ExprAst *m_var;
    QList<ExprAst> m_args;
};

/** @brief Class representing a filter in the AST */
class ExprAstFilter : public ExprAst
{
  public:
    ExprAstFilter(const char *name,ExprAst *arg) : m_name(name), m_arg(arg)
    { TRACE(("ExprAstFilter(%s)\n",name)); }
   ~ExprAstFilter() { delete m_arg; }
    const QCString &name() const { return m_name; }
    TemplateVariant apply(const TemplateVariant &v,TemplateContext *c)
    {
      TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
      TRACE(("Applying filter '%s' to '%s' (type=%d)\n",m_name.data(),v.toString().data(),v.type()));
      TemplateVariant arg;
      if (m_arg) arg = m_arg->resolve(c);
      bool ok;
      TemplateVariant result = TemplateFilterFactory::instance()->apply(m_name,v,arg,ok);
      if (!ok)
      {
        ci->warn(ci->templateName(),ci->line(),"unknown filter '%s'",m_name.data());
      }
      return result;
    }
  private:
    QCString m_name;
    ExprAst *m_arg;
};

/** @brief Class representing a filter applied to an expression in the AST */
class ExprAstFilterAppl : public ExprAst
{
  public:
    ExprAstFilterAppl(ExprAst *expr,ExprAstFilter *filter)
      : m_expr(expr), m_filter(filter)
    { TRACE(("ExprAstFilterAppl\n")); }
   ~ExprAstFilterAppl() { delete m_expr; delete m_filter; }
    virtual TemplateVariant resolve(TemplateContext *c)
    {
      return m_filter->apply(m_expr->resolve(c),c);
    }
  private:
    ExprAst *m_expr;
    ExprAstFilter *m_filter;
};

/** @brief Class representing a string literal in the AST */
class ExprAstLiteral : public ExprAst
{
  public:
    ExprAstLiteral(const char *lit) : m_literal(lit)
    { TRACE(("ExprAstLiteral(%s)\n",lit)); }
    const QCString &literal() const { return m_literal; }
    virtual TemplateVariant resolve(TemplateContext *) { return TemplateVariant(m_literal); }
  private:
    QCString m_literal;
};

/** @brief Class representing a negation (not) operator in the AST */
class ExprAstNegate : public ExprAst
{
  public:
    ExprAstNegate(ExprAst *expr) : m_expr(expr)
    { TRACE(("ExprAstNegate\n")); }
   ~ExprAstNegate() { delete m_expr; }
    virtual TemplateVariant resolve(TemplateContext *c)
    { return TemplateVariant(!m_expr->resolve(c).toBool()); }
  private:
    ExprAst *m_expr;
};

class ExprAstUnary : public ExprAst
{
  public:
    ExprAstUnary(Operator::Type op,ExprAst *exp) : m_operator(op), m_exp(exp)
    { TRACE(("ExprAstUnary %s\n",Operator::toString(op))); }
   ~ExprAstUnary() { delete m_exp; }
    virtual TemplateVariant resolve(TemplateContext *c)
    {
      TemplateVariant exp = m_exp->resolve(c);
      switch (m_operator)
      {
        case Operator::Minus:
          return -exp.toInt();
        default:
          return TemplateVariant();
      }
    }
  private:
    Operator::Type m_operator;
    ExprAst *m_exp;
};

/** @brief Class representing a binary operator in the AST */
class ExprAstBinary : public ExprAst
{
  public:
    ExprAstBinary(Operator::Type op,ExprAst *lhs,ExprAst *rhs)
      : m_operator(op), m_lhs(lhs), m_rhs(rhs)
    { TRACE(("ExprAstBinary %s\n",Operator::toString(op))); }
   ~ExprAstBinary() { delete m_lhs; delete m_rhs; }
    virtual TemplateVariant resolve(TemplateContext *c)
    {
      TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
      TemplateVariant lhs = m_lhs->resolve(c);
      TemplateVariant rhs = m_rhs ? m_rhs->resolve(c) : TemplateVariant();
      switch(m_operator)
      {
        case Operator::Or:
          return TemplateVariant(lhs.toBool() || rhs.toBool());
        case Operator::And:
          return TemplateVariant(lhs.toBool() && rhs.toBool());
        case Operator::Equal:
          return TemplateVariant(lhs == rhs);
        case Operator::NotEqual:
          return TemplateVariant(!(lhs == rhs));
        case Operator::Less:
          if (lhs.type()==TemplateVariant::String && rhs.type()==TemplateVariant::String)
          {
            return lhs.toString()<rhs.toString();
          }
          else
          {
            return lhs.toInt()<rhs.toInt();
          }
        case Operator::Greater:
          if (lhs.type()==TemplateVariant::String && rhs.type()==TemplateVariant::String)
          {
            return !(lhs.toString()<rhs.toString());
          }
          else
          {
            return lhs.toInt()>rhs.toInt();
          }
        case Operator::LessEqual:
          if (lhs.type()==TemplateVariant::String && rhs.type()==TemplateVariant::String)
          {
            return lhs.toString()==rhs.toString() || lhs.toString()<rhs.toString();
          }
          else
          {
            return lhs.toInt()<=rhs.toInt();
          }
        case Operator::GreaterEqual:
          if (lhs.type()==TemplateVariant::String && rhs.type()==TemplateVariant::String)
          {
            return lhs.toString()==rhs.toString() || !(lhs.toString()<rhs.toString());
          }
          else
          {
            return lhs.toInt()>=rhs.toInt();
          }
        case Operator::Plus:
          {
            return TemplateVariant(lhs.toInt() + rhs.toInt());
          }
        case Operator::Minus:
          {
            return TemplateVariant(lhs.toInt() - rhs.toInt());
          }
        case Operator::Multiply:
          {
            return TemplateVariant(lhs.toInt() * rhs.toInt());
          }
        case Operator::Divide:
          {
            int denom = rhs.toInt();
            if (denom!=0)
            {
              return TemplateVariant(lhs.toInt() / denom);
            }
            else // divide by zero
            {
              ci->warn(ci->templateName(),ci->line(),"division by zero while evaluating expression is undefined");
              return 0;
            }
          }
        case Operator::Modulo:
          {
            int denom = rhs.toInt();
            if (denom!=0)
            {
              return TemplateVariant(lhs.toInt() % denom);
            }
            else // module zero
            {
              ci->warn(ci->templateName(),ci->line(),"modulo zero while evaluating expression is undefined");
              return 0;
            }
          }
        default:
          return TemplateVariant();
      }
    }
  private:
    Operator::Type m_operator;
    ExprAst *m_lhs;
    ExprAst *m_rhs;
};

//----------------------------------------------------------

/** @brief Base class of all nodes in a template's AST */
class TemplateNode
{
  public:
    TemplateNode(TemplateNode *parent) : m_parent(parent) {}
    virtual ~TemplateNode() {}

    virtual void render(FTextStream &ts, TemplateContext *c) = 0;

    TemplateNode *parent() { return m_parent; }

  private:
    TemplateNode *m_parent;
};

//----------------------------------------------------------

/** @brief Parser for templates */
class TemplateParser
{
  public:
    TemplateParser(const TemplateEngine *engine,
                   const QCString &templateName,QList<TemplateToken> &tokens);
    void parse(TemplateNode *parent,int line,const QStrList &stopAt,
               QList<TemplateNode> &nodes);
    bool hasNextToken() const;
    TemplateToken *takeNextToken();
    void removeNextToken();
    void prependToken(const TemplateToken *token);
    const TemplateToken *currentToken() const;
    QCString templateName() const { return m_templateName; }
    void warn(const char *fileName,int line,const char *fmt,...) const;
  private:
    const TemplateEngine *m_engine;
    QCString m_templateName;
    QList<TemplateToken> &m_tokens;
};

//--------------------------------------------------------------------

/** @brief Recursive decent parser for Django style template expressions.
 */
class ExpressionParser
{
  public:
    ExpressionParser(const TemplateParser *parser,int line)
      : m_parser(parser), m_line(line), m_tokenStream(0)
    {
    }
    virtual ~ExpressionParser()
    {
    }

    ExprAst *parse(const char *expr)
    {
      if (expr==0) return 0;
      m_tokenStream = expr;
      getNextToken();
      return parseExpression();
    }

  private:

    /** @brief Class representing a token within an expression. */
    class ExprToken
    {
      public:
        ExprToken() : type(Unknown), num(-1), op(Operator::Or)
        {
        }
        enum Type
        {
          Unknown, Operator, Number, Identifier, Literal
        };

        Type type;
        int num;
        QCString id;
        Operator::Type op;
    };

    ExprAst *parseExpression()
    {
      TRACE(("{parseExpression(%s)\n",m_tokenStream));
      ExprAst *result = parseOrExpression();
      TRACE(("}parseExpression(%s)\n",m_tokenStream));
      return result;
    }

    ExprAst *parseOrExpression()
    {
      TRACE(("{parseOrExpression(%s)\n",m_tokenStream));
      ExprAst *lhs = parseAndExpression();
      if (lhs)
      {
        while (m_curToken.type==ExprToken::Operator &&
            m_curToken.op==Operator::Or)
        {
          getNextToken();
          ExprAst *rhs = parseAndExpression();
          lhs = new ExprAstBinary(Operator::Or,lhs,rhs);
        }
      }
      TRACE(("}parseOrExpression(%s)\n",m_tokenStream));
      return lhs;
    }

    ExprAst *parseAndExpression()
    {
      TRACE(("{parseAndExpression(%s)\n",m_tokenStream));
      ExprAst *lhs = parseNotExpression();
      if (lhs)
      {
        while (m_curToken.type==ExprToken::Operator &&
               m_curToken.op==Operator::And)
        {
          getNextToken();
          ExprAst *rhs = parseNotExpression();
          lhs = new ExprAstBinary(Operator::And,lhs,rhs);
        }
      }
      TRACE(("}parseAndExpression(%s)\n",m_tokenStream));
      return lhs;
    }

    ExprAst *parseNotExpression()
    {
      TRACE(("{parseNotExpression(%s)\n",m_tokenStream));
      ExprAst *result=0;
      if (m_curToken.type==ExprToken::Operator &&
          m_curToken.op==Operator::Not)
      {
        getNextToken();
        ExprAst *expr = parseCompareExpression();
        if (expr==0)
        {
          warn(m_parser->templateName(),m_line,"argument missing for not operator");
          return 0;
        }
        result = new ExprAstNegate(expr);
      }
      else
      {
        result = parseCompareExpression();
      }
      TRACE(("}parseNotExpression(%s)\n",m_tokenStream));
      return result;
    }

    ExprAst *parseCompareExpression()
    {
      TRACE(("{parseCompareExpression(%s)\n",m_tokenStream));
      ExprAst *lhs = parseAdditiveExpression();
      if (lhs)
      {
        Operator::Type op = m_curToken.op;
        if (m_curToken.type==ExprToken::Operator &&
            (op==Operator::Less      ||
             op==Operator::Greater   ||
             op==Operator::Equal     ||
             op==Operator::NotEqual  ||
             op==Operator::LessEqual ||
             op==Operator::GreaterEqual
            )
           )
        {
          getNextToken();
          ExprAst *rhs = parseNotExpression();
          lhs = new ExprAstBinary(op,lhs,rhs);
        }
      }
      TRACE(("}parseCompareExpression(%s)\n",m_tokenStream));
      return lhs;
    }

    ExprAst *parseAdditiveExpression()
    {
      TRACE(("{parseAdditiveExpression(%s)\n",m_tokenStream));
      ExprAst *lhs = parseMultiplicativeExpression();
      if (lhs)
      {
        while (m_curToken.type==ExprToken::Operator &&
               (m_curToken.op==Operator::Plus || m_curToken.op==Operator::Minus))
        {
          Operator::Type op = m_curToken.op;
          getNextToken();
          ExprAst *rhs = parseMultiplicativeExpression();
          lhs = new ExprAstBinary(op,lhs,rhs);
        }
      }
      TRACE(("}parseAdditiveExpression(%s)\n",m_tokenStream));
      return lhs;
    }

    ExprAst *parseMultiplicativeExpression()
    {
      TRACE(("{parseMultiplicativeExpression(%s)\n",m_tokenStream));
      ExprAst *lhs = parseUnaryExpression();
      if (lhs)
      {
        while (m_curToken.type==ExprToken::Operator &&
               (m_curToken.op==Operator::Multiply || m_curToken.op==Operator::Divide || m_curToken.op==Operator::Modulo))
        {
          Operator::Type op = m_curToken.op;
          getNextToken();
          ExprAst *rhs = parseUnaryExpression();
          lhs = new ExprAstBinary(op,lhs,rhs);
        }
      }
      TRACE(("}parseMultiplicativeExpression(%s)\n",m_tokenStream));
      return lhs;
    }

    ExprAst *parseUnaryExpression()
    {
      TRACE(("{parseUnaryExpression(%s)\n",m_tokenStream));
      ExprAst *result=0;
      if (m_curToken.type==ExprToken::Operator)
      {
        if (m_curToken.op==Operator::Plus)
        {
          getNextToken();
          result = parsePrimaryExpression();
        }
        else if (m_curToken.op==Operator::Minus)
        {
          getNextToken();
          ExprAst *rhs = parsePrimaryExpression();
          result = new ExprAstUnary(m_curToken.op,rhs);
        }
        else
        {
          result = parsePrimaryExpression();
        }
      }
      else
      {
        result = parsePrimaryExpression();
      }
      TRACE(("}parseUnaryExpression(%s)\n",m_tokenStream));
      return result;
    }

    ExprAst *parsePrimaryExpression()
    {
      TRACE(("{parsePrimary(%s)\n",m_tokenStream));
      ExprAst *result=0;
      switch (m_curToken.type)
      {
        case ExprToken::Number:
          result = parseNumber();
          break;
        case ExprToken::Identifier:
          result = parseFilteredVariable();
          break;
        case ExprToken::Literal:
          result = parseLiteral();
          break;
        case ExprToken::Operator:
          if (m_curToken.op==Operator::LeftParen)
          {
            getNextToken(); // skip over opening bracket
            result = parseExpression();
            if (m_curToken.type!=ExprToken::Operator ||
                m_curToken.op!=Operator::RightParen)
            {
              warn(m_parser->templateName(),m_line,"missing closing parenthesis");
            }
            else
            {
              getNextToken(); // skip over closing bracket
            }
          }
          else
          {
            warn(m_parser->templateName(),m_line,"unexpected operator '%s' in expression",
                Operator::toString(m_curToken.op));
          }
          break;
        default:
          warn(m_parser->templateName(),m_line,"unexpected token in expression");
      }
      TRACE(("}parsePrimary(%s)\n",m_tokenStream));
      return result;
    }

    ExprAst *parseNumber()
    {
      TRACE(("{parseNumber(%d)\n",m_curToken.num));
      ExprAst *num = new ExprAstNumber(m_curToken.num);
      getNextToken();
      TRACE(("}parseNumber()\n"));
      return num;
    }

    ExprAst *parseIdentifier()
    {
      TRACE(("{parseIdentifier(%s)\n",m_curToken.id.data()));
      ExprAst *id = new ExprAstVariable(m_curToken.id);
      getNextToken();
      TRACE(("}parseIdentifier()\n"));
      return id;
    }

    ExprAst *parseLiteral()
    {
      TRACE(("{parseLiteral(%s)\n",m_curToken.id.data()));
      ExprAst *lit = new ExprAstLiteral(m_curToken.id);
      getNextToken();
      TRACE(("}parseLiteral()\n"));
      return lit;
    }

    ExprAst *parseIdentifierOptionalArgs()
    {
      TRACE(("{parseIdentifierOptionalArgs(%s)\n",m_curToken.id.data()));
      ExprAst *expr = parseIdentifier();
      if (expr)
      {
        if (m_curToken.type==ExprToken::Operator &&
            m_curToken.op==Operator::Colon)
        {
          getNextToken();
          ExprAst *argExpr = parsePrimaryExpression();
          QList<ExprAst> args;
          args.append(argExpr);
          while (m_curToken.type==ExprToken::Operator &&
                 m_curToken.op==Operator::Comma)
          {
            getNextToken();
            argExpr = parsePrimaryExpression();
            args.append(argExpr);
          }
          expr = new ExprAstFunctionVariable(expr,args);
        }
      }
      TRACE(("}parseIdentifierOptionalArgs()\n"));
      return expr;
    }

    ExprAst *parseFilteredVariable()
    {
      TRACE(("{parseFilteredVariable()\n"));
      ExprAst *expr = parseIdentifierOptionalArgs();
      if (expr)
      {
        while (m_curToken.type==ExprToken::Operator &&
               m_curToken.op==Operator::Filter)
        {
          getNextToken();
          ExprAstFilter *filter = parseFilter();
          if (!filter) break;
          expr = new ExprAstFilterAppl(expr,filter);
        }
      }
      TRACE(("}parseFilteredVariable()\n"));
      return expr;
    }

    ExprAstFilter *parseFilter()
    {
      TRACE(("{parseFilter(%s)\n",m_curToken.id.data()));
      QCString filterName = m_curToken.id;
      getNextToken();
      ExprAst *argExpr=0;
      if (m_curToken.type==ExprToken::Operator &&
          m_curToken.op==Operator::Colon)
      {
        getNextToken();
        argExpr = parsePrimaryExpression();
      }
      ExprAstFilter *filter = new ExprAstFilter(filterName,argExpr);
      TRACE(("}parseFilter()\n"));
      return filter;
    }


    bool getNextToken()
    {
      const char *p = m_tokenStream;
      char s[2];
      s[1]=0;
      if (p==0 || *p=='\0') return FALSE;
      while (*p==' ') p++; // skip over spaces
      char c=*p;
      const char *q = p;
      switch (c)
      {
        case '=':
          if (c=='=' && *(p+1)=='=') // equal
          {
            m_curToken.op = Operator::Equal;
            p+=2;
          }
          break;
        case '!':
          if (c=='!' && *(p+1)=='=') // not equal
          {
            m_curToken.op = Operator::NotEqual;
            p+=2;
          }
          break;
        case '<':
          if (c=='<' && *(p+1)=='=') // less or equal
          {
            m_curToken.op = Operator::LessEqual;
            p+=2;
          }
          else // less
          {
            m_curToken.op = Operator::Less;
            p++;
          }
          break;
        case '>':
          if (c=='>' && *(p+1)=='=') // greater or equal
          {
            m_curToken.op = Operator::GreaterEqual;
            p+=2;
          }
          else // greater
          {
            m_curToken.op = Operator::Greater;
            p++;
          }
          break;
        case '(':
          m_curToken.op = Operator::LeftParen;
          p++;
          break;
        case ')':
          m_curToken.op = Operator::RightParen;
          p++;
          break;
        case '|':
          m_curToken.op = Operator::Filter;
          p++;
          break;
        case '+':
          m_curToken.op = Operator::Plus;
          p++;
          break;
        case '-':
          m_curToken.op = Operator::Minus;
          p++;
          break;
        case '*':
          m_curToken.op = Operator::Multiply;
          p++;
          break;
        case '/':
          m_curToken.op = Operator::Divide;
          p++;
          break;
        case '%':
          m_curToken.op = Operator::Modulo;
          p++;
          break;
        case ':':
          m_curToken.op = Operator::Colon;
          p++;
          break;
        case ',':
          m_curToken.op = Operator::Comma;
          p++;
          break;
        case 'n':
          if (strncmp(p,"not ",4)==0)
          {
            m_curToken.op = Operator::Not;
            p+=4;
          }
          break;
        case 'a':
          if (strncmp(p,"and ",4)==0)
          {
            m_curToken.op = Operator::And;
            p+=4;
          }
          break;
        case 'o':
          if (strncmp(p,"or ",3)==0)
          {
            m_curToken.op = Operator::Or;
            p+=3;
          }
          break;
        default:
          break;
      }
      if (p!=q) // found an operator
      {
        m_curToken.type = ExprToken::Operator;
      }
      else // no token found yet
      {
        if (c>='0' && c<='9') // number?
        {
          m_curToken.type = ExprToken::Number;
          const char *np = p;
          m_curToken.num = 0;
          while (*np>='0' && *np<='9')
          {
            m_curToken.num*=10;
            m_curToken.num+=*np-'0';
            np++;
          }
          p=np;
        }
        else if (c=='_' || (c>='a' && c<='z') || (c>='A' && c<='Z')) // identifier?
        {
          m_curToken.type = ExprToken::Identifier;
          s[0]=c;
          m_curToken.id = s;
          p++;
          while ((c=*p) &&
              (c=='_' || c=='.' ||
               (c>='a' && c<='z') ||
               (c>='A' && c<='Z') ||
               (c>='0' && c<='9'))
              )
          {
            s[0]=c;
            m_curToken.id+=s;
            p++;
          }
          if (m_curToken.id=="True") // treat true literal as numerical 1
          {
            m_curToken.type = ExprToken::Number;
            m_curToken.num = 1;
          }
          else if (m_curToken.id=="False") // treat false literal as numerical 0
          {
            m_curToken.type = ExprToken::Number;
            m_curToken.num = 0;
          }
        }
        else if (c=='"' || c=='\'') // string literal
        {
          m_curToken.type = ExprToken::Literal;
          m_curToken.id.resize(0);
          p++;
          char tokenChar = c;
          char cp=0;
          while ((c=*p) && (c!=tokenChar || (c==tokenChar && cp=='\\')))
          {
            s[0]=c;
            if (c!='\\' || cp=='\\') // don't add escapes
            {
              m_curToken.id+=s;
            }
            cp=c;
            p++;
          }
          if (*p==tokenChar) p++;
        }
      }
      if (p==q) // still no valid token found -> error
      {
        m_curToken.type = ExprToken::Unknown;
        char s[2];
        s[0]=c;
        s[1]=0;
        warn(m_parser->templateName(),m_line,"Found unknown token %s while parsing %s",s,m_tokenStream);
        m_curToken.id = s;
        p++;
      }
      //TRACE(("token type=%d op=%d num=%d id=%s\n",
      //    m_curToken.type,m_curToken.op,m_curToken.num,m_curToken.id.data()));

      m_tokenStream = p;
      return TRUE;
    }

    const TemplateParser *m_parser;
    ExprToken m_curToken;
    int m_line;
    const char *m_tokenStream;
};

//----------------------------------------------------------

/** @brief Class representing a lexical token in a template */
class TemplateToken
{
  public:
    enum Type { Text, Variable, Block };
    TemplateToken(Type t,const char *d,int l) : type(t), data(d), line(l) {}
    Type type;
    QCString data;
    int line;
};

//----------------------------------------------------------

/** @brief Class representing a list of AST nodes in a template */
class TemplateNodeList : public QList<TemplateNode>
{
  public:
    TemplateNodeList()
    {
      setAutoDelete(TRUE);
    }
    void render(FTextStream &ts,TemplateContext *c)
    {
      TRACE(("{TemplateNodeList::render\n"));
      QListIterator<TemplateNode> it(*this);
      TemplateNode *tn=0;
      for (it.toFirst();(tn=it.current());++it)
      {
        tn->render(ts,c);
      }
      TRACE(("}TemplateNodeList::render\n"));
    }
};

//----------------------------------------------------------

/** @brief Internal class representing the implementation of a template */
class TemplateImpl : public TemplateNode, public Template
{
  public:
    TemplateImpl(TemplateEngine *e,const QCString &name,const QCString &data);
    void render(FTextStream &ts, TemplateContext *c);

    TemplateEngine *engine() const { return m_engine; }
    TemplateBlockContext *blockContext() { return &m_blockContext; }

  private:
    TemplateEngine *m_engine;
    QCString m_name;
    TemplateNodeList m_nodes;
    TemplateBlockContext m_blockContext;
};

//----------------------------------------------------------


TemplateContextImpl::TemplateContextImpl(const TemplateEngine *e)
  : m_engine(e), m_templateName("<unknown>"), m_line(1), m_activeEscapeIntf(0),
    m_spacelessIntf(0), m_spacelessEnabled(FALSE), m_indices(TemplateStruct::alloc())
{
  m_indexStacks.setAutoDelete(TRUE);
  m_contextStack.setAutoDelete(TRUE);
  m_escapeIntfDict.setAutoDelete(TRUE);
  push();
  set("index",m_indices.get());
}

TemplateContextImpl::~TemplateContextImpl()
{
  pop();
}

void TemplateContextImpl::set(const char *name,const TemplateVariant &v)
{
  TemplateVariant *pv = m_contextStack.getFirst()->find(name);
  if (pv)
  {
    m_contextStack.getFirst()->remove(name);
  }
  m_contextStack.getFirst()->insert(name,new TemplateVariant(v));
}

TemplateVariant TemplateContextImpl::get(const QCString &name) const
{
  int i=name.find('.');
  if (i==-1) // simple name
  {
    return getPrimary(name);
  }
  else // obj.prop
  {
    TemplateVariant v;
    QCString objName = name.left(i);
    v = getPrimary(objName);
    QCString propName = name.mid(i+1);
    while (!propName.isEmpty())
    {
      //printf("getPrimary(%s) type=%d:%s\n",objName.data(),v.type(),v.toString().data());
      if (v.type()==TemplateVariant::Struct)
      {
        i = propName.find(".");
        int l = i==-1 ? propName.length() : i;
        v = v.toStruct()->get(propName.left(l));
        if (!v.isValid())
        {
          warn(m_templateName,m_line,"requesting non-existing property '%s' for object '%s'",propName.left(l).data(),objName.data());
        }
        if (i!=-1)
        {
          objName = propName.left(i);
          propName = propName.mid(i+1);
        }
        else
        {
          propName.resize(0);
        }
      }
      else if (v.type()==TemplateVariant::List)
      {
        i = propName.find(".");
        int l = i==-1 ? propName.length() : i;
        bool b;
        int index = propName.left(l).toInt(&b);
        if (b)
        {
          v = v.toList()->at(index);
        }
        else
        {
          warn(m_templateName,m_line,"list index '%s' is not valid",propName.data());
          break;
        }
        if (i!=-1)
        {
          propName = propName.mid(i+1);
        }
        else
        {
          propName.resize(0);
        }
      }
      else
      {
        warn(m_templateName,m_line,"using . on an object '%s' is not an struct or list",objName.data());
        return TemplateVariant();
      }
    } while (i!=-1);
    return v;
  }
}

const TemplateVariant *TemplateContextImpl::getRef(const QCString &name) const
{
  QListIterator< QDict<TemplateVariant> > it(m_contextStack);
  QDict<TemplateVariant> *dict;
  for (it.toFirst();(dict=it.current());++it)
  {
    TemplateVariant *v = dict->find(name);
    if (v) return v;
  }
  return 0; // not found
}

TemplateVariant TemplateContextImpl::getPrimary(const QCString &name) const
{
  const TemplateVariant *v = getRef(name);
  return v ? *v : TemplateVariant();
}

void TemplateContextImpl::push()
{
  QDict<TemplateVariant> *dict = new QDict<TemplateVariant>;
  dict->setAutoDelete(TRUE);
  m_contextStack.prepend(dict);
}

void TemplateContextImpl::pop()
{
  if (!m_contextStack.removeFirst())
  {
    warn(m_templateName,m_line,"pop() called on empty context stack!\n");
  }
}

TemplateBlockContext *TemplateContextImpl::blockContext()
{
  return &m_blockContext;
}

void TemplateContextImpl::warn(const char *fileName,int line,const char *fmt,...) const
{
  va_list args;
  va_start(args,fmt);
  va_warn(fileName,line,fmt,args);
  va_end(args);
  m_engine->printIncludeContext(fileName,line);
}

void TemplateContextImpl::openSubIndex(const QCString &indexName)
{
  //printf("TemplateContextImpl::openSubIndex(%s)\n",indexName.data());
  QStack<TemplateVariant> *stack = m_indexStacks.find(indexName);
  if (!stack || stack->isEmpty() || stack->top()->type()==TemplateVariant::List) // error: no stack yet or no entry
  {
    warn(m_templateName,m_line,"opensubindex for index %s without preceding indexentry",indexName.data());
    return;
  }
  // get the parent entry to add the list to
  TemplateStruct *entry = dynamic_cast<TemplateStruct*>(stack->top()->toStruct());
  if (entry)
  {
    // add new list to the stack
    TemplateList *list = TemplateList::alloc();
    stack->push(new TemplateVariant(list));
    entry->set("children",list);
    entry->set("is_leaf_node",false);
  }
}

void TemplateContextImpl::closeSubIndex(const QCString &indexName)
{
  //printf("TemplateContextImpl::closeSubIndex(%s)\n",indexName.data());
  QStack<TemplateVariant> *stack = m_indexStacks.find(indexName);
  if (!stack || stack->count()<3)
  {
    warn(m_templateName,m_line,"closesubindex for index %s without matching open",indexName.data());
  }
  else // stack->count()>=2
  {
    if (stack->top()->type()==TemplateVariant::Struct)
    {
      delete stack->pop(); // pop struct
      delete stack->pop(); // pop list
    }
    else // empty list! correct "is_left_node" attribute of the parent entry
    {
      delete stack->pop(); // pop list
      TemplateStruct *entry = dynamic_cast<TemplateStruct*>(stack->top()->toStruct());
      if (entry)
      {
        entry->set("is_leaf_node",true);
      }
    }
  }
}

void TemplateContextImpl::addIndexEntry(const QCString &indexName,const QValueList<TemplateKeyValue> &arguments)
{
  QValueListConstIterator<TemplateKeyValue> it = arguments.begin();
  //printf("TemplateContextImpl::addIndexEntry(%s)\n",indexName.data());
  //while (it!=arguments.end())
  //{
  //  printf("  key=%s value=%s\n",(*it).key.data(),(*it).value.toString().data());
  //  ++it;
  //}
  QStack<TemplateVariant> *stack = m_indexStacks.find(indexName);
  if (!stack) // no stack yet, create it!
  {
    stack = new QStack<TemplateVariant>;
    stack->setAutoDelete(TRUE);
    m_indexStacks.insert(indexName,stack);
  }
  TemplateList *list  = 0;
  if (stack->isEmpty()) // first item, create empty list and add it to the index
  {
    list = TemplateList::alloc();
    stack->push(new TemplateVariant(list));
    m_indices->set(indexName,list); // make list available under index
  }
  else // stack not empty
  {
    if (stack->top()->type()==TemplateVariant::Struct) // already an entry in the list
    {
      // remove current entry from the stack
      delete stack->pop();
    }
    else // first entry after opensubindex
    {
      ASSERT(stack->top()->type()==TemplateVariant::List);
    }
    // get list to add new item
    list = dynamic_cast<TemplateList*>(stack->top()->toList());
  }
  TemplateStruct *entry = TemplateStruct::alloc();
  // add user specified fields to the entry
  for (it=arguments.begin();it!=arguments.end();++it)
  {
    entry->set((*it).key,(*it).value);
  }
  if (list->count()>0)
  {
    TemplateStruct *lastEntry = dynamic_cast<TemplateStruct*>(list->at(list->count()-1).toStruct());
    lastEntry->set("last",false);
  }
  entry->set("is_leaf_node",true);
  entry->set("first",list->count()==0);
  entry->set("last",true);
  stack->push(new TemplateVariant(entry));
  list->append(entry);
}

//----------------------------------------------------------

/** @brief Class representing a piece of plain text in a template */
class TemplateNodeText : public TemplateNode
{
  public:
    TemplateNodeText(TemplateParser *,TemplateNode *parent,int,const QCString &data)
      : TemplateNode(parent), m_data(data)
    {
      TRACE(("TemplateNodeText('%s')\n",replace(data,'\n',' ').data()));
    }

    void render(FTextStream &ts, TemplateContext *c)
    {
      //printf("TemplateNodeText::render(%s)\n",m_data.data());
      TemplateContextImpl* ci = dynamic_cast<TemplateContextImpl*>(c);
      if (ci->spacelessEnabled())
      {
        ts << ci->spacelessIntf()->remove(m_data);
      }
      else
      {
        ts << m_data;
      }
    }
  private:
    QCString m_data;
};

//----------------------------------------------------------

/** @brief Class representing a variable in a template */
class TemplateNodeVariable : public TemplateNode
{
  public:
    TemplateNodeVariable(TemplateParser *parser,TemplateNode *parent,int line,const QCString &var)
      : TemplateNode(parent), m_templateName(parser->templateName()), m_line(line)
    {
      TRACE(("TemplateNodeVariable(%s)\n",var.data()));
      ExpressionParser expParser(parser,line);
      m_var = expParser.parse(var);
      if (m_var==0)
      {
        parser->warn(m_templateName,line,"invalid expression '%s' for variable",var.data());
      }
    }
    ~TemplateNodeVariable()
    {
      delete m_var;
    }

    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl* ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      if (m_var)
      {
        TemplateVariant v = m_var->resolve(c);
        if (v.type()==TemplateVariant::Function)
        {
          v = v.call(QValueList<TemplateVariant>());
        }
        //printf("TemplateNodeVariable::render(%s) raw=%d\n",value.data(),v.raw());
        if (ci->escapeIntf() && !v.raw())
        {
          ts << ci->escapeIntf()->escape(v.toString());
        }
        else
        {
          ts << v.toString();
        }
      }
    }

  private:
    QCString m_templateName;
    int m_line;
    ExprAst *m_var;
    QList<ExprAst> m_args;
};

//----------------------------------------------------------

/** @brief Helper class for creating template AST tag nodes and returning
  * the template for a given node.
 */
template<class T> class TemplateNodeCreator : public TemplateNode
{
  public:
    TemplateNodeCreator(TemplateParser *parser,TemplateNode *parent,int line)
      : TemplateNode(parent), m_templateName(parser->templateName()), m_line(line) {}
    static TemplateNode *createInstance(TemplateParser *parser,
                                        TemplateNode *parent,
                                        int line,
                                        const QCString &data)
    {
      return new T(parser,parent,line,data);
    }
    TemplateImpl *getTemplate()
    {
      TemplateNode *root = this;
      while (root && root->parent())
      {
        root = root->parent();
      }
      return dynamic_cast<TemplateImpl*>(root);
    }
  protected:
    QCString m_templateName;
    int m_line;
};

//----------------------------------------------------------

/** @brief Class representing an 'if' tag in a template */
class TemplateNodeIf : public TemplateNodeCreator<TemplateNodeIf>
{
  public:
    TemplateNodeIf(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data) :
      TemplateNodeCreator<TemplateNodeIf>(parser,parent,line)
    {
      m_ifGuardedNodes.setAutoDelete(TRUE);
      TRACE(("{TemplateNodeIf(%s)\n",data.data()));
      if (data.isEmpty())
      {
        parser->warn(m_templateName,line,"missing argument for if tag");
      }
      QStrList stopAt;
      stopAt.append("endif");
      stopAt.append("elif");
      stopAt.append("else");

      // if 'nodes'
      GuardedNodes *guardedNodes = new GuardedNodes;
      ExpressionParser ex(parser,line);
      guardedNodes->line = line;
      guardedNodes->guardAst = ex.parse(data);
      parser->parse(this,line,stopAt,guardedNodes->trueNodes);
      m_ifGuardedNodes.append(guardedNodes);
      TemplateToken *tok = parser->takeNextToken();

      // elif 'nodes'
      while (tok && tok->data.left(5)=="elif ")
      {
        ExpressionParser ex(parser,line);
        guardedNodes = new GuardedNodes;
        guardedNodes->line = tok->line;
        guardedNodes->guardAst = ex.parse(tok->data.mid(5));
        parser->parse(this,tok->line,stopAt,guardedNodes->trueNodes);
        m_ifGuardedNodes.append(guardedNodes);
        // proceed to the next token
        delete tok;
        tok = parser->takeNextToken();
      }

      // else 'nodes'
      if (tok && tok->data=="else")
      {
        stopAt.removeLast(); // remove "else"
        stopAt.removeLast(); // remove "elif"
        parser->parse(this,line,stopAt,m_falseNodes);
        parser->removeNextToken(); // skip over endif
      }
      delete tok;
      TRACE(("}TemplateNodeIf(%s)\n",data.data()));
    }
    ~TemplateNodeIf()
    {
    }

    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl* ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      //printf("TemplateNodeIf::render #trueNodes=%d #falseNodes=%d\n",m_trueNodes.count(),m_falseNodes.count());
      bool processed=FALSE;
      QListIterator<GuardedNodes> li(m_ifGuardedNodes);
      GuardedNodes *nodes;
      for (li.toFirst();(nodes=li.current()) && !processed;++li)
      {
        if (nodes->guardAst)
        {
          TemplateVariant guardValue = nodes->guardAst->resolve(c);
          if (guardValue.toBool()) // render nodes for the first guard that evaluated to 'true'
          {
            nodes->trueNodes.render(ts,c);
           processed=TRUE;
          }
        }
        else
        {
          ci->warn(m_templateName,nodes->line,"invalid expression for if/elif");
        }
      }
      if (!processed)
      {
        // all guards are false, render 'else' nodes
        m_falseNodes.render(ts,c);
      }
    }
  private:
    struct GuardedNodes
    {
      GuardedNodes() : guardAst(0) {}
     ~GuardedNodes() { delete guardAst; }
      int line;
      ExprAst *guardAst;
      TemplateNodeList trueNodes;
    };
    QList<GuardedNodes> m_ifGuardedNodes;
    TemplateNodeList m_falseNodes;
};

//----------------------------------------------------------
/** @brief Class representing a 'for' tag in a template */
class TemplateNodeRepeat : public TemplateNodeCreator<TemplateNodeRepeat>
{
  public:
    TemplateNodeRepeat(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeRepeat>(parser,parent,line)
    {
      TRACE(("{TemplateNodeRepeat(%s)\n",data.data()));
      ExpressionParser expParser(parser,line);
      m_expr = expParser.parse(data);
      QStrList stopAt;
      stopAt.append("endrepeat");
      parser->parse(this,line,stopAt,m_repeatNodes);
      parser->removeNextToken(); // skip over endrepeat
      TRACE(("}TemplateNodeRepeat(%s)\n",data.data()));
    }
    ~TemplateNodeRepeat()
    {
      delete m_expr;
    }
    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl* ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      TemplateVariant v;
      if (m_expr && (v=m_expr->resolve(c)).type()==TemplateVariant::Integer)
      {
        int i, n = v.toInt();
        for (i=0;i<n;i++)
        {
          TemplateAutoRef<TemplateStruct> s(TemplateStruct::alloc());
          s->set("counter0",    (int)i);
          s->set("counter",     (int)(i+1));
          s->set("revcounter",  (int)(n-i));
          s->set("revcounter0", (int)(n-i-1));
          s->set("first",i==0);
          s->set("last", i==n-1);
          c->set("repeatloop",s.get());
          // render all items for this iteration of the loop
          m_repeatNodes.render(ts,c);
        }
      }
      else // simple type...
      {
        ci->warn(m_templateName,m_line,"for requires a variable of list type!");
      }
    }
  private:
    TemplateNodeList m_repeatNodes;
    ExprAst *m_expr;
};

//----------------------------------------------------------

/** @brief Class representing a 'range' tag in a template */
class TemplateNodeRange : public TemplateNodeCreator<TemplateNodeRange>
{
  public:
    TemplateNodeRange(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeRange>(parser,parent,line)
    {
      TRACE(("{TemplateNodeRange(%s)\n",data.data()));
      QCString start,end;
      int i1 = data.find(" from ");
      int i2 = data.find(" to ");
      int i3 = data.find(" downto ");
      if (i1==-1)
      {
        if (data.right(5)==" from")
        {
          parser->warn(m_templateName,line,"range missing after 'from' keyword");
        }
        else if (data=="from")
        {
          parser->warn(m_templateName,line,"range needs an iterator variable and a range");
        }
        else
        {
          parser->warn(m_templateName,line,"range is missing 'from' keyword");
        }
      }
      else if (i2==-1 && i3==-1)
      {
        if (data.right(3)==" to")
        {
          parser->warn(m_templateName,line,"range is missing end value after 'to' keyword");
        }
        else if (data.right(7)==" downto")
        {
          parser->warn(m_templateName,line,"range is missing end value after 'downto' keyword");
        }
        else
        {
          parser->warn(m_templateName,line,"range is missing 'to' or 'downto' keyword");
        }
      }
      else
      {
        m_var = data.left(i1).stripWhiteSpace();
        if (m_var.isEmpty())
        {
          parser->warn(m_templateName,line,"range needs an iterator variable");
        }
        start = data.mid(i1+6,i2-i1-6).stripWhiteSpace();
        if (i2!=-1)
        {
          end = data.right(data.length()-i2-4).stripWhiteSpace();
          m_down = FALSE;
        }
        else if (i3!=-1)
        {
          end = data.right(data.length()-i3-8).stripWhiteSpace();
          m_down = TRUE;
        }
      }
      ExpressionParser expParser(parser,line);
      m_startExpr = expParser.parse(start);
      m_endExpr   = expParser.parse(end);

      QStrList stopAt;
      stopAt.append("endrange");
      parser->parse(this,line,stopAt,m_loopNodes);
      parser->removeNextToken(); // skip over endrange
      TRACE(("}TemplateNodeRange(%s)\n",data.data()));
    }

    ~TemplateNodeRange()
    {
      delete m_startExpr;
      delete m_endExpr;
    }

    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl* ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      //printf("TemplateNodeRange::render #loopNodes=%d\n",
      //    m_loopNodes.count());
      if (m_startExpr && m_endExpr)
      {
        TemplateVariant vs = m_startExpr->resolve(c);
        TemplateVariant ve = m_endExpr->resolve(c);
        if (vs.type()==TemplateVariant::Integer && ve.type()==TemplateVariant::Integer)
        {
          int s = vs.toInt();
          int e = ve.toInt();
          int l = m_down ? s-e+1 : e-s+1;
          if (l>0)
          {
            c->push();
            //int index = m_reversed ? list.count() : 0;
            TemplateVariant v;
            const TemplateVariant *parentLoop = c->getRef("forloop");
            uint index = 0;
            int i = m_down ? e : s;
            bool done=false;
            while (!done)
            {
              // set the forloop meta-data variable
              TemplateAutoRef<TemplateStruct> s(TemplateStruct::alloc());
              s->set("counter0",    (int)index);
              s->set("counter",     (int)(index+1));
              s->set("revcounter",  (int)(l-index));
              s->set("revcounter0", (int)(l-index-1));
              s->set("first",index==0);
              s->set("last", (int)index==l-1);
              s->set("parentloop",parentLoop ? *parentLoop : TemplateVariant());
              c->set("forloop",s.get());

              // set the iterator variable
              c->set(m_var,i);

              // render all items for this iteration of the loop
              m_loopNodes.render(ts,c);

              index++;
              if (m_down)
              {
                i--;
                done = i<e;
              }
              else
              {
                i++;
                done = i>e;
              }
            }
            c->pop();
          }
          else
          {
            ci->warn(m_templateName,m_line,"range %d %s %d is empty!",
                s,m_down?"downto":"to",e);
          }
        }
        else if (vs.type()!=TemplateVariant::Integer)
        {
          ci->warn(m_templateName,m_line,"range requires a start value of integer type!");
        }
        else if (ve.type()!=TemplateVariant::Integer)
        {
          ci->warn(m_templateName,m_line,"range requires an end value of integer type!");
        }
      }
      else if (!m_startExpr)
      {
        ci->warn(m_templateName,m_line,"range has empty start value");
      }
      else if (!m_endExpr)
      {
        ci->warn(m_templateName,m_line,"range has empty end value");
      }
    }

  private:
    bool m_down;
    ExprAst *m_startExpr;
    ExprAst *m_endExpr;
    QCString m_var;
    TemplateNodeList m_loopNodes;
};

//----------------------------------------------------------

/** @brief Class representing a 'for' tag in a template */
class TemplateNodeFor : public TemplateNodeCreator<TemplateNodeFor>
{
  public:
    TemplateNodeFor(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeFor>(parser,parent,line)
    {
      TRACE(("{TemplateNodeFor(%s)\n",data.data()));
      QCString exprStr;
      int i = data.find(" in ");
      if (i==-1)
      {
        if (data.right(3)==" in")
        {
          parser->warn(m_templateName,line,"for is missing container after 'in' keyword");
        }
        else if (data=="in")
        {
          parser->warn(m_templateName,line,"for needs at least one iterator variable");
        }
        else
        {
          parser->warn(m_templateName,line,"for is missing 'in' keyword");
        }
      }
      else
      {
        m_vars = split(data.left(i),",");
        if (m_vars.count()==0)
        {
          parser->warn(m_templateName,line,"for needs at least one iterator variable");
        }

        int j = data.find(" reversed",i);
        m_reversed = (j!=-1);

        if (j==-1) j=data.length();
        if (j>i+4)
        {
          exprStr = data.mid(i+4,j-i-4); // skip over " in " part
        }
        if (exprStr.isEmpty())
        {
          parser->warn(m_templateName,line,"for is missing container after 'in' keyword");
        }
      }
      ExpressionParser expParser(parser,line);
      m_expr = expParser.parse(exprStr);

      QStrList stopAt;
      stopAt.append("endfor");
      stopAt.append("empty");
      parser->parse(this,line,stopAt,m_loopNodes);
      TemplateToken *tok = parser->takeNextToken();
      if (tok && tok->data=="empty")
      {
        stopAt.removeLast();
        parser->parse(this,line,stopAt,m_emptyNodes);
        parser->removeNextToken(); // skip over endfor
      }
      delete tok;
      TRACE(("}TemplateNodeFor(%s)\n",data.data()));
    }

    ~TemplateNodeFor()
    {
      delete m_expr;
    }

    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl* ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      //printf("TemplateNodeFor::render #loopNodes=%d #emptyNodes=%d\n",
      //    m_loopNodes.count(),m_emptyNodes.count());
      if (m_expr)
      {
        TemplateVariant v = m_expr->resolve(c);
        const TemplateListIntf *list = v.toList();
        if (list)
        {
          uint listSize = list->count();
          if (listSize==0) // empty for loop
          {
            m_emptyNodes.render(ts,c);
            return;
          }
          c->push();
          //int index = m_reversed ? list.count() : 0;
          TemplateVariant v;
          const TemplateVariant *parentLoop = c->getRef("forloop");
          uint index = m_reversed ? listSize-1 : 0;
          TemplateListIntf::ConstIterator *it = list->createIterator();
          for (m_reversed ? it->toLast() : it->toFirst();
              (it->current(v));
              m_reversed ? it->toPrev() : it->toNext())
          {
            TemplateAutoRef<TemplateStruct> s(TemplateStruct::alloc());
            s->set("counter0",    (int)index);
            s->set("counter",     (int)(index+1));
            s->set("revcounter",  (int)(listSize-index));
            s->set("revcounter0", (int)(listSize-index-1));
            s->set("first",index==0);
            s->set("last", index==listSize-1);
            s->set("parentloop",parentLoop ? *parentLoop : TemplateVariant());
            c->set("forloop",s.get());

            // add variables for this loop to the context
            //obj->addVariableToContext(index,m_vars,c);
            uint vi=0;
            if (m_vars.count()==1) // loop variable represents an item
            {
              c->set(m_vars[vi++],v);
            }
            else if (m_vars.count()>1 && v.type()==TemplateVariant::Struct)
              // loop variables represent elements in a list item
            {
              for (uint i=0;i<m_vars.count();i++,vi++)
              {
                c->set(m_vars[vi],v.toStruct()->get(m_vars[vi]));
              }
            }
            for (;vi<m_vars.count();vi++)
            {
              c->set(m_vars[vi],TemplateVariant());
            }

            // render all items for this iteration of the loop
            m_loopNodes.render(ts,c);

            if (m_reversed) index--; else index++;
          }
          c->pop();
          delete it;
        }
        else // simple type...
        {
          ci->warn(m_templateName,m_line,"for requires a variable of list type!");
        }
      }
    }

  private:
    bool m_reversed;
    ExprAst *m_expr;
    QValueList<QCString> m_vars;
    TemplateNodeList m_loopNodes;
    TemplateNodeList m_emptyNodes;
};

//----------------------------------------------------------

/** @brief Class representing an 'markers' tag in a template */
class TemplateNodeMsg : public TemplateNodeCreator<TemplateNodeMsg>
{
  public:
    TemplateNodeMsg(TemplateParser *parser,TemplateNode *parent,int line,const QCString &)
      : TemplateNodeCreator<TemplateNodeMsg>(parser,parent,line)
    {
      TRACE(("{TemplateNodeMsg()\n"));
      QStrList stopAt;
      stopAt.append("endmsg");
      parser->parse(this,line,stopAt,m_nodes);
      parser->removeNextToken(); // skip over endmarkers
      TRACE(("}TemplateNodeMsg()\n"));
    }
    void render(FTextStream &, TemplateContext *c)
    {
      TemplateContextImpl* ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      TemplateEscapeIntf *escIntf = ci->escapeIntf();
      ci->setActiveEscapeIntf(0); // avoid escaping things we send to standard out
      bool enable = ci->spacelessEnabled();
      ci->enableSpaceless(FALSE);
      FTextStream ts(stdout);
      m_nodes.render(ts,c);
      ts << endl;
      ci->setActiveEscapeIntf(escIntf);
      ci->enableSpaceless(enable);
    }
  private:
    TemplateNodeList m_nodes;
};


//----------------------------------------------------------

/** @brief Class representing a 'block' tag in a template */
class TemplateNodeBlock : public TemplateNodeCreator<TemplateNodeBlock>
{
  public:
    TemplateNodeBlock(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeBlock>(parser,parent,line)
    {
      TRACE(("{TemplateNodeBlock(%s)\n",data.data()));
      m_blockName = data;
      if (m_blockName.isEmpty())
      {
        parser->warn(parser->templateName(),line,"block tag without name");
      }
      QStrList stopAt;
      stopAt.append("endblock");
      parser->parse(this,line,stopAt,m_nodes);
      parser->removeNextToken(); // skip over endblock
      TRACE(("}TemplateNodeBlock(%s)\n",data.data()));
    }

    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      TemplateImpl *t = getTemplate();
      if (t)
      {
        // remove block from the context, so block.super can work
        TemplateNodeBlock *nb = ci->blockContext()->pop(m_blockName);
        if (nb) // block is overruled
        {
          ci->push();
          QGString super;
          FTextStream ss(&super);
          // get super block of block nb
          TemplateNodeBlock *sb = ci->blockContext()->get(m_blockName);
          if (sb && sb!=nb && sb!=this) // nb and sb both overrule this block
          {
            sb->render(ss,c); // render parent of nb to string
          }
          else if (nb!=this) // only nb overrules this block
          {
            m_nodes.render(ss,c); // render parent of nb to string
          }
          // add 'block.super' variable to allow access to parent block content
          TemplateAutoRef<TemplateStruct> superBlock(TemplateStruct::alloc());
          superBlock->set("super",TemplateVariant(super.data(),TRUE));
          ci->set("block",superBlock.get());
          // render the overruled block contents
          t->engine()->enterBlock(nb->m_templateName,nb->m_blockName,nb->m_line);
          nb->m_nodes.render(ts,c);
          t->engine()->leaveBlock();
          ci->pop();
          // re-add block to the context
          ci->blockContext()->push(nb);
        }
        else // block has no overrule
        {
          t->engine()->enterBlock(m_templateName,m_blockName,m_line);
          m_nodes.render(ts,c);
          t->engine()->leaveBlock();
        }
      }
    }

    QCString name() const
    {
      return m_blockName;
    }

  private:
    QCString m_blockName;
    TemplateNodeList m_nodes;
};

//----------------------------------------------------------

/** @brief Class representing a 'extend' tag in a template */
class TemplateNodeExtend : public TemplateNodeCreator<TemplateNodeExtend>
{
  public:
    TemplateNodeExtend(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeExtend>(parser,parent,line)
    {
      TRACE(("{TemplateNodeExtend(%s)\n",data.data()));
      ExpressionParser ep(parser,line);
      if (data.isEmpty())
      {
        parser->warn(m_templateName,line,"extend tag is missing template file argument");
      }
      m_extendExpr = ep.parse(data);
      QStrList stopAt;
      parser->parse(this,line,stopAt,m_nodes);
      TRACE(("}TemplateNodeExtend(%s)\n",data.data()));
    }
   ~TemplateNodeExtend()
    {
      delete m_extendExpr;
    }

    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl* ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      if (m_extendExpr==0) return;

      QCString extendFile = m_extendExpr->resolve(c).toString();
      if (extendFile.isEmpty())
      {
        ci->warn(m_templateName,m_line,"invalid parameter for extend command");
      }

      // goto root of tree (template node)
      TemplateImpl *t = getTemplate();
      if (t)
      {
        Template *bt = t->engine()->loadByName(extendFile,m_line);
        TemplateImpl *baseTemplate = bt ? dynamic_cast<TemplateImpl*>(bt) : 0;
        if (baseTemplate)
        {
          // fill block context
          TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
          TemplateBlockContext *bc = ci->blockContext();

          // add overruling blocks to the context
          QListIterator<TemplateNode> li(m_nodes);
          TemplateNode *n;
          for (li.toFirst();(n=li.current());++li)
          {
            TemplateNodeBlock *nb = dynamic_cast<TemplateNodeBlock*>(n);
            if (nb)
            {
              bc->add(nb);
            }
            TemplateNodeMsg *msg = dynamic_cast<TemplateNodeMsg*>(n);
            if (msg)
            {
              msg->render(ts,c);
            }
          }

          // render the base template with the given context
          baseTemplate->render(ts,c);

          // clean up
          bc->clear();
          t->engine()->unload(t);
        }
        else
        {
          ci->warn(m_templateName,m_line,"failed to load template %s for extend",extendFile.data());
        }
      }
    }

  private:
    ExprAst *m_extendExpr;
    TemplateNodeList m_nodes;
};

/** @brief Class representing an 'include' tag in a template */
class TemplateNodeInclude : public TemplateNodeCreator<TemplateNodeInclude>
{
  public:
    TemplateNodeInclude(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeInclude>(parser,parent,line)
    {
      TRACE(("TemplateNodeInclude(%s)\n",data.data()));
      ExpressionParser ep(parser,line);
      if (data.isEmpty())
      {
        parser->warn(m_templateName,line,"include tag is missing template file argument");
      }
      m_includeExpr = ep.parse(data);
    }
   ~TemplateNodeInclude()
    {
      delete m_includeExpr;
    }
    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl* ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      if (m_includeExpr)
      {
        QCString includeFile = m_includeExpr->resolve(c).toString();
        if (includeFile.isEmpty())
        {
          ci->warn(m_templateName,m_line,"invalid parameter for include command\n");
        }
        else
        {
          TemplateImpl *t = getTemplate();
          if (t)
          {
            Template *it = t->engine()->loadByName(includeFile,m_line);
            TemplateImpl *incTemplate = it ? dynamic_cast<TemplateImpl*>(it) : 0;
            if (incTemplate)
            {
              incTemplate->render(ts,c);
              t->engine()->unload(t);
            }
            else
            {
              ci->warn(m_templateName,m_line,"failed to load template '%s' for include",includeFile.data()?includeFile.data():"");
            }
          }
        }
      }
    }

  private:
    ExprAst *m_includeExpr;
};

//----------------------------------------------------------

/** @brief Class representing an 'create' tag in a template */
class TemplateNodeCreate : public TemplateNodeCreator<TemplateNodeCreate>
{
  public:
    TemplateNodeCreate(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeCreate>(parser,parent,line)
    {
      TRACE(("TemplateNodeCreate(%s)\n",data.data()));
      ExpressionParser ep(parser,line);
      if (data.isEmpty())
      {
        parser->warn(m_templateName,line,"create tag is missing arguments");
      }
      int i = data.find(" from ");
      if (i==-1)
      {
        if (data.right(3)==" from")
        {
          parser->warn(m_templateName,line,"create is missing template name after 'from' keyword");
        }
        else if (data=="from")
        {
          parser->warn(m_templateName,line,"create needs a file name and a template name");
        }
        else
        {
          parser->warn(m_templateName,line,"create is missing 'from' keyword");
        }
      }
      else
      {
        ExpressionParser ep(parser,line);
        m_fileExpr = ep.parse(data.left(i).stripWhiteSpace());
        m_templateExpr = ep.parse(data.mid(i+6).stripWhiteSpace());
      }
    }
   ~TemplateNodeCreate()
    {
      delete m_templateExpr;
      delete m_fileExpr;
    }
    void render(FTextStream &, TemplateContext *c)
    {
      TemplateContextImpl* ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      if (m_templateExpr && m_fileExpr)
      {
        QCString templateFile = m_templateExpr->resolve(c).toString();
        QCString outputFile = m_fileExpr->resolve(c).toString();
        if (templateFile.isEmpty())
        {
          ci->warn(m_templateName,m_line,"empty template name parameter for create command\n");
        }
        else if (outputFile.isEmpty())
        {
          ci->warn(m_templateName,m_line,"empty file name parameter for create command\n");
        }
        else
        {
          TemplateImpl *t = getTemplate();
          if (t)
          {
            Template *ct = t->engine()->loadByName(templateFile,m_line);
            TemplateImpl *createTemplate = ct ? dynamic_cast<TemplateImpl*>(ct) : 0;
            if (createTemplate)
            {
              QCString extension=outputFile;
              int i=extension.findRev('.');
              if (i!=-1)
              {
                extension=extension.right(extension.length()-i-1);
              }
              if (!ci->outputDirectory().isEmpty())
              {
                outputFile.prepend(ci->outputDirectory()+"/");
              }
              QFile f(outputFile);
              if (f.open(IO_WriteOnly))
              {
                TemplateEscapeIntf *escIntf = ci->escapeIntf();
                ci->selectEscapeIntf(extension);
                FTextStream ts(&f);
                createTemplate->render(ts,c);
                t->engine()->unload(t);
                ci->setActiveEscapeIntf(escIntf);
              }
              else
              {
                ci->warn(m_templateName,m_line,"failed to open output file '%s' for create command",outputFile.data());
              }
            }
            else
            {
              ci->warn(m_templateName,m_line,"failed to load template '%s' for include",templateFile.data());
            }
          }
        }
      }
    }

  private:
    ExprAst *m_templateExpr;
    ExprAst *m_fileExpr;
};

//----------------------------------------------------------

/** @brief Class representing an 'tree' tag in a template */
class TemplateNodeTree : public TemplateNodeCreator<TemplateNodeTree>
{
    struct TreeContext
    {
      TreeContext(TemplateNodeTree *o,const TemplateListIntf *l,TemplateContext *c)
        : object(o), list(l), templateCtx(c) {}
      TemplateNodeTree *object;
      const TemplateListIntf *list;
      TemplateContext  *templateCtx;
    };
  public:
    TemplateNodeTree(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeTree>(parser,parent,line)
    {
      TRACE(("{TemplateNodeTree(%s)\n",data.data()));
      ExpressionParser ep(parser,line);
      if (data.isEmpty())
      {
        parser->warn(m_templateName,line,"recursetree tag is missing data argument");
      }
      m_treeExpr = ep.parse(data);
      QStrList stopAt;
      stopAt.append("endrecursetree");
      parser->parse(this,line,stopAt,m_treeNodes);
      parser->removeNextToken(); // skip over endrecursetree
      TRACE(("}TemplateNodeTree(%s)\n",data.data()));
    }
    ~TemplateNodeTree()
    {
      delete m_treeExpr;
    }
    static TemplateVariant renderChildrenStub(const void *ctx, const QValueList<TemplateVariant> &)
    {
      return TemplateVariant(((TreeContext*)ctx)->object->
                             renderChildren((const TreeContext*)ctx),TRUE);
    }
    QCString renderChildren(const TreeContext *ctx)
    {
      //printf("TemplateNodeTree::renderChildren(%d)\n",ctx->list->count());
      // render all children of node to a string and return it
      QGString result;
      FTextStream ss(&result);
      TemplateContext *c = ctx->templateCtx;
      c->push();
      TemplateVariant node;
      TemplateListIntf::ConstIterator *it = ctx->list->createIterator();
      for (it->toFirst();(it->current(node));it->toNext())
      {
        c->set("node",node);
        bool hasChildren=FALSE;
        const TemplateStructIntf *ns = node.toStruct();
        if (ns) // node is a struct
        {
          TemplateVariant v = ns->get("children");
          if (v.isValid()) // with a field 'children'
          {
            const TemplateListIntf *list = v.toList();
            if (list && list->count()>0) // non-empty list
            {
              TreeContext childCtx(this,list,ctx->templateCtx);
//              TemplateVariant children(&childCtx,renderChildrenStub);
              TemplateVariant children(TemplateVariant::Delegate::fromFunction(&childCtx,renderChildrenStub));
              children.setRaw(TRUE);
              c->set("children",children);
              m_treeNodes.render(ss,c);
              hasChildren=TRUE;
            }
          }
        }
        if (!hasChildren)
        {
          c->set("children",TemplateVariant("")); // provide default
          m_treeNodes.render(ss,c);
        }
      }
      c->pop();
      return result.data();
    }
    void render(FTextStream &ts, TemplateContext *c)
    {
      //printf("TemplateNodeTree::render()\n");
      TemplateContextImpl* ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      TemplateVariant v = m_treeExpr->resolve(c);
      const TemplateListIntf *list = v.toList();
      if (list)
      {
        TreeContext ctx(this,list,c);
        ts << renderChildren(&ctx);
      }
      else
      {
        ci->warn(m_templateName,m_line,"recursetree's argument should be a list type");
      }
    }

  private:
    ExprAst         *m_treeExpr;
    TemplateNodeList m_treeNodes;
};

//----------------------------------------------------------

/** @brief Class representing an 'indexentry' tag in a template */
class TemplateNodeIndexEntry : public TemplateNodeCreator<TemplateNodeIndexEntry>
{
    struct Mapping
    {
      Mapping(const QCString &n,ExprAst *e) : name(n), value(e) {}
     ~Mapping() { delete value; }
      QCString name;
      ExprAst *value;
    };
  public:
    TemplateNodeIndexEntry(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeIndexEntry>(parser,parent,line)
    {
      TRACE(("{TemplateNodeIndexEntry(%s)\n",data.data()));
      m_args.setAutoDelete(TRUE);
      ExpressionParser expParser(parser,line);
      QValueList<QCString> args = split(data," ");
      QValueListIterator<QCString> it = args.begin();
      if (it==args.end() || (*it).find('=')!=-1)
      {
        parser->warn(parser->templateName(),line,"Missing name for indexentry tag");
      }
      else
      {
        m_name = *it;
        ++it;
        while (it!=args.end())
        {
          QCString arg = *it;
          int j=arg.find('=');
          if (j>0)
          {
            ExprAst *expr = expParser.parse(arg.mid(j+1));
            if (expr)
            {
              m_args.append(new Mapping(arg.left(j),expr));
            }
          }
          else
          {
            parser->warn(parser->templateName(),line,"invalid argument '%s' for indexentry tag",arg.data());
          }
          ++it;
        }
      }
      TRACE(("}TemplateNodeIndexEntry(%s)\n",data.data()));
    }
    void render(FTextStream &, TemplateContext *c)
    {
      if (!m_name.isEmpty())
      {
        TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
        ci->setLocation(m_templateName,m_line);
        QListIterator<Mapping> it(m_args);
        Mapping *mapping;
        QValueList<TemplateKeyValue> list;
        for (it.toFirst();(mapping=it.current());++it)
        {
          list.append(TemplateKeyValue(mapping->name,mapping->value->resolve(c)));
        }
        ci->addIndexEntry(m_name,list);
      }
    }
  private:
    QCString m_name;
    QList<Mapping> m_args;
};

//----------------------------------------------------------

/** @brief Class representing an 'opensubindex' tag in a template */
class TemplateNodeOpenSubIndex : public TemplateNodeCreator<TemplateNodeOpenSubIndex>
{
  public:
    TemplateNodeOpenSubIndex(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeOpenSubIndex>(parser,parent,line)
    {
      TRACE(("{TemplateNodeOpenSubIndex(%s)\n",data.data()));
      m_name = data.stripWhiteSpace();
      if (m_name.isEmpty())
      {
        parser->warn(parser->templateName(),line,"Missing argument for opensubindex tag");
      }
      else if (m_name.find(' ')!=-1)
      {
        parser->warn(parser->templateName(),line,"Expected single argument for opensubindex tag got '%s'",data.data());
        m_name="";
      }
      TRACE(("}TemplateNodeOpenSubIndex(%s)\n",data.data()));
    }
    void render(FTextStream &, TemplateContext *c)
    {
      if (!m_name.isEmpty())
      {
        TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
        ci->setLocation(m_templateName,m_line);
        ci->openSubIndex(m_name);
      }
    }
  private:
    QCString m_name;
};

//----------------------------------------------------------

/** @brief Class representing an 'closesubindex' tag in a template */
class TemplateNodeCloseSubIndex : public TemplateNodeCreator<TemplateNodeCloseSubIndex>
{
  public:
    TemplateNodeCloseSubIndex(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeCloseSubIndex>(parser,parent,line)
    {
      TRACE(("{TemplateNodeCloseSubIndex(%s)\n",data.data()));
      m_name = data.stripWhiteSpace();
      if (m_name.isEmpty())
      {
        parser->warn(parser->templateName(),line,"Missing argument for closesubindex tag");
      }
      else if (m_name.find(' ')!=-1 || m_name.isEmpty())
      {
        parser->warn(parser->templateName(),line,"Expected single argument for closesubindex tag got '%s'",data.data());
        m_name="";
      }
      TRACE(("}TemplateNodeCloseSubIndex(%s)\n",data.data()));
    }
    void render(FTextStream &, TemplateContext *c)
    {
      if (!m_name.isEmpty())
      {
        TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
        ci->setLocation(m_templateName,m_line);
        ci->closeSubIndex(m_name);
      }
    }
  private:
    QCString m_name;
};


//----------------------------------------------------------

/** @brief Class representing an 'with' tag in a template */
class TemplateNodeWith : public TemplateNodeCreator<TemplateNodeWith>
{
    struct Mapping
    {
      Mapping(const QCString &n,ExprAst *e) : name(n), value(e) {}
     ~Mapping() { delete value; }
      QCString name;
      ExprAst *value;
    };
  public:
    TemplateNodeWith(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeWith>(parser,parent,line)
    {
      TRACE(("{TemplateNodeWith(%s)\n",data.data()));
      m_args.setAutoDelete(TRUE);
      ExpressionParser expParser(parser,line);
      QValueList<QCString> args = split(data," ");
      QValueListIterator<QCString> it = args.begin();
      while (it!=args.end())
      {
        QCString arg = *it;
        int j=arg.find('=');
        if (j>0)
        {
          ExprAst *expr = expParser.parse(arg.mid(j+1));
          if (expr)
          {
            m_args.append(new Mapping(arg.left(j),expr));
          }
        }
        else
        {
          parser->warn(parser->templateName(),line,"invalid argument '%s' for with tag",arg.data());
        }
        ++it;
      }
      QStrList stopAt;
      stopAt.append("endwith");
      parser->parse(this,line,stopAt,m_nodes);
      parser->removeNextToken(); // skip over endwith
      TRACE(("}TemplateNodeWith(%s)\n",data.data()));
    }
    ~TemplateNodeWith()
    {
    }
    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      c->push();
      QListIterator<Mapping> it(m_args);
      Mapping *mapping;
      for (it.toFirst();(mapping=it.current());++it)
      {
        TemplateVariant value = mapping->value->resolve(c);
        ci->set(mapping->name,value);
      }
      m_nodes.render(ts,c);
      c->pop();
    }
  private:
    TemplateNodeList m_nodes;
    QList<Mapping> m_args;
};

//----------------------------------------------------------

/** @brief Class representing an 'set' tag in a template */
class TemplateNodeCycle : public TemplateNodeCreator<TemplateNodeCycle>
{
  public:
    TemplateNodeCycle(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeCycle>(parser,parent,line)
    {
      TRACE(("{TemplateNodeCycle(%s)\n",data.data()));
      m_args.setAutoDelete(TRUE);
      m_index=0;
      ExpressionParser expParser(parser,line);
      QValueList<QCString> args = split(data," ");
      QValueListIterator<QCString> it = args.begin();
      while (it!=args.end())
      {
        ExprAst *expr = expParser.parse(*it);
        if (expr)
        {
          m_args.append(expr);
        }
        ++it;
      }
      if (m_args.count()<2)
      {
          parser->warn(parser->templateName(),line,"expected at least two arguments for cycle command, got %d",m_args.count());
      }
      TRACE(("}TemplateNodeCycle(%s)\n",data.data()));
    }
    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      if (m_index<m_args.count())
      {
        TemplateVariant v = m_args.at(m_index)->resolve(c);
        if (v.type()==TemplateVariant::Function)
        {
          v = v.call(QValueList<TemplateVariant>());
        }
        if (ci->escapeIntf() && !v.raw())
        {
          ts << ci->escapeIntf()->escape(v.toString());
        }
        else
        {
          ts << v.toString();
        }
      }
      if (++m_index==m_args.count()) // wrap around
      {
        m_index=0;
      }
    }
  private:
    uint m_index;
    QList<ExprAst> m_args;
};

//----------------------------------------------------------

/** @brief Class representing an 'set' tag in a template */
class TemplateNodeSet : public TemplateNodeCreator<TemplateNodeSet>
{
    struct Mapping
    {
      Mapping(const QCString &n,ExprAst *e) : name(n), value(e) {}
     ~Mapping() { delete value; }
      QCString name;
      ExprAst *value;
    };
  public:
    TemplateNodeSet(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeSet>(parser,parent,line)
    {
      TRACE(("{TemplateNodeSet(%s)\n",data.data()));
      m_args.setAutoDelete(TRUE);
      ExpressionParser expParser(parser,line);
      QValueList<QCString> args = split(data," ");
      QValueListIterator<QCString> it = args.begin();
      while (it!=args.end())
      {
        QCString arg = *it;
        int j=arg.find('=');
        if (j>0)
        {
          ExprAst *expr = expParser.parse(arg.mid(j+1));
          if (expr)
          {
            m_args.append(new Mapping(arg.left(j),expr));
          }
        }
        else
        {
          parser->warn(parser->templateName(),line,"invalid argument '%s' for with tag",arg.data());
        }
        ++it;
      }
      TRACE(("}TemplateNodeSet(%s)\n",data.data()));
    }
    void render(FTextStream &, TemplateContext *c)
    {
      TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      QListIterator<Mapping> it(m_args);
      Mapping *mapping;
      for (it.toFirst();(mapping=it.current());++it)
      {
        TemplateVariant value = mapping->value->resolve(c);
        ci->set(mapping->name,value);
      }
    }
  private:
    QList<Mapping> m_args;
};

//----------------------------------------------------------

/** @brief Class representing an 'spaceless' tag in a template */
class TemplateNodeSpaceless : public TemplateNodeCreator<TemplateNodeSpaceless>
{
  public:
    TemplateNodeSpaceless(TemplateParser *parser,TemplateNode *parent,int line,const QCString &)
      : TemplateNodeCreator<TemplateNodeSpaceless>(parser,parent,line)
    {
      TRACE(("{TemplateNodeSpaceless()\n"));
      QStrList stopAt;
      stopAt.append("endspaceless");
      parser->parse(this,line,stopAt,m_nodes);
      parser->removeNextToken(); // skip over endwith
      TRACE(("}TemplateNodeSpaceless()\n"));
    }
    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      bool wasSpaceless = ci->spacelessEnabled();
      ci->enableSpaceless(TRUE);
      m_nodes.render(ts,c);
      ci->enableSpaceless(wasSpaceless);
    }
  private:
    TemplateNodeList m_nodes;
};

//----------------------------------------------------------

/** @brief Class representing an 'markers' tag in a template */
class TemplateNodeMarkers : public TemplateNodeCreator<TemplateNodeMarkers>
{
  public:
    TemplateNodeMarkers(TemplateParser *parser,TemplateNode *parent,int line,const QCString &data)
      : TemplateNodeCreator<TemplateNodeMarkers>(parser,parent,line)
    {
      TRACE(("{TemplateNodeMarkers(%s)\n",data.data()));
      int i = data.find(" in ");
      int w = data.find(" with ");
      if (i==-1 || w==-1 || w<i)
      {
        parser->warn(m_templateName,line,"markers tag as wrong format. Expected: markers <var> in <list> with <string_with_markers>");
      }
      else
      {
        ExpressionParser expParser(parser,line);
        m_var = data.left(i);
        m_listExpr = expParser.parse(data.mid(i+4,w-i-4));
        m_patternExpr = expParser.parse(data.right(data.length()-w-6));
      }
      QStrList stopAt;
      stopAt.append("endmarkers");
      parser->parse(this,line,stopAt,m_nodes);
      parser->removeNextToken(); // skip over endmarkers
      TRACE(("}TemplateNodeMarkers(%s)\n",data.data()));
    }
    void render(FTextStream &ts, TemplateContext *c)
    {
      TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
      ci->setLocation(m_templateName,m_line);
      if (!m_var.isEmpty() && m_listExpr && m_patternExpr)
      {
        TemplateVariant v = m_listExpr->resolve(c);
        const TemplateListIntf *list = v.toList();
        TemplateVariant patternStr = m_patternExpr->resolve(c);
        if (list)
        {
          if (patternStr.type()==TemplateVariant::String)
          {
            TemplateListIntf::ConstIterator *it = list->createIterator();
            c->push();
            QCString str = patternStr.toString();
            QRegExp marker("@[0-9]+"); // pattern for a marker, i.e. @0, @1 ... @12, etc
            int index=0,newIndex,matchLen;
            while ((newIndex=marker.match(str,index,&matchLen))!=-1)
            {
              ts << str.mid(index,newIndex-index); // write text before marker
              bool ok;
              uint entryIndex = str.mid(newIndex+1,matchLen-1).toUInt(&ok); // get marker id
              TemplateVariant var;
              uint i=0;
              // search for list element at position id
              for (it->toFirst(); (it->current(var)) && i<entryIndex; it->toNext(),i++) {}
              if (ok && i==entryIndex) // found element
              {
                TemplateAutoRef<TemplateStruct> s(TemplateStruct::alloc());
                s->set("id",(int)i);
                c->set("markers",s.get());
                c->set(m_var,var); // define local variable to hold element of list type
                bool wasSpaceless = ci->spacelessEnabled();
                ci->enableSpaceless(TRUE);
                m_nodes.render(ts,c);
                ci->enableSpaceless(wasSpaceless);
              }
              else if (!ok)
              {
                ci->warn(m_templateName,m_line,"markers pattern string has invalid markers '%s'",str.data());
              }
              else if (i<entryIndex)
              {
                ci->warn(m_templateName,m_line,"markers list does not an element for marker position %d",i);
              }
              index=newIndex+matchLen; // set index just after marker
            }
            ts << str.right(str.length()-index); // write text after last marker
            c->pop();
          }
          else
          {
            ci->warn(m_templateName,m_line,"markers requires a parameter of string type after 'with'!");
          }
        }
        else
        {
          ci->warn(m_templateName,m_line,"markers requires a parameter of list type after 'in'!");
        }
      }
    }
  private:
    TemplateNodeList m_nodes;
    QCString m_var;
    ExprAst *m_listExpr;
    ExprAst *m_patternExpr;
};

//----------------------------------------------------------

/** @brief Factory class for creating tag AST nodes found in a template */
class TemplateNodeFactory
{
  public:
    typedef TemplateNode *(*CreateFunc)(TemplateParser *parser,
                                        TemplateNode *parent,
                                        int line,
                                        const QCString &data);

    static TemplateNodeFactory *instance()
    {
      static TemplateNodeFactory *instance = 0;
      if (instance==0) instance = new TemplateNodeFactory;
      return instance;
    }

    TemplateNode *create(const QCString &name,
                         TemplateParser *parser,
                         TemplateNode *parent,
                         int line,
                         const QCString &data)
    {
      if (m_registry.find(name)==0) return 0;
      return ((CreateFunc)m_registry[name])(parser,parent,line,data);
    }

    void registerTemplateNode(const QCString &name,CreateFunc func)
    {
      m_registry.insert(name,(void*)func);
    }

    /** @brief Helper class for registering a template AST node */
    template<class T> class AutoRegister
    {
      public:
        AutoRegister<T>(const QCString &key)
        {
          TemplateNodeFactory::instance()->registerTemplateNode(key,T::createInstance);
        }
    };

  private:
    QDict<void> m_registry;
};

// register a handler for each start tag we support
static TemplateNodeFactory::AutoRegister<TemplateNodeIf>        autoRefIf("if");
static TemplateNodeFactory::AutoRegister<TemplateNodeFor>       autoRefFor("for");
static TemplateNodeFactory::AutoRegister<TemplateNodeMsg>       autoRefMsg("msg");
static TemplateNodeFactory::AutoRegister<TemplateNodeSet>       autoRefSet("set");
static TemplateNodeFactory::AutoRegister<TemplateNodeTree>      autoRefTree("recursetree");
static TemplateNodeFactory::AutoRegister<TemplateNodeWith>      autoRefWith("with");
static TemplateNodeFactory::AutoRegister<TemplateNodeBlock>     autoRefBlock("block");
static TemplateNodeFactory::AutoRegister<TemplateNodeCycle>     autoRefCycle("cycle");
static TemplateNodeFactory::AutoRegister<TemplateNodeRange>     autoRefRange("range");
static TemplateNodeFactory::AutoRegister<TemplateNodeExtend>    autoRefExtend("extend");
static TemplateNodeFactory::AutoRegister<TemplateNodeCreate>    autoRefCreate("create");
static TemplateNodeFactory::AutoRegister<TemplateNodeRepeat>    autoRefRepeat("repeat");
static TemplateNodeFactory::AutoRegister<TemplateNodeInclude>   autoRefInclude("include");
static TemplateNodeFactory::AutoRegister<TemplateNodeMarkers>   autoRefMarkers("markers");
static TemplateNodeFactory::AutoRegister<TemplateNodeSpaceless> autoRefSpaceless("spaceless");
static TemplateNodeFactory::AutoRegister<TemplateNodeIndexEntry> autoRefIndexEntry("indexentry");
static TemplateNodeFactory::AutoRegister<TemplateNodeOpenSubIndex> autoRefOpenSubIndex("opensubindex");
static TemplateNodeFactory::AutoRegister<TemplateNodeCloseSubIndex> autoRefCloseSubIndex("closesubindex");

//----------------------------------------------------------

TemplateBlockContext::TemplateBlockContext() : m_blocks(257)
{
  m_blocks.setAutoDelete(TRUE);
}

TemplateNodeBlock *TemplateBlockContext::get(const QCString &name) const
{
  QList<TemplateNodeBlock> *list = m_blocks.find(name);
  if (list==0 || list->count()==0)
  {
    return 0;
  }
  else
  {
    return list->getLast();
  }
}

TemplateNodeBlock *TemplateBlockContext::pop(const QCString &name) const
{
  QList<TemplateNodeBlock> *list = m_blocks.find(name);
  if (list==0 || list->count()==0)
  {
    return 0;
  }
  else
  {
    return list->take(list->count()-1);
  }
}

void TemplateBlockContext::add(TemplateNodeBlock *block)
{
  QList<TemplateNodeBlock> *list = m_blocks.find(block->name());
  if (list==0)
  {
    list = new QList<TemplateNodeBlock>;
    m_blocks.insert(block->name(),list);
  }
  list->prepend(block);
}

void TemplateBlockContext::add(TemplateBlockContext *ctx)
{
  QDictIterator< QList<TemplateNodeBlock> > di(ctx->m_blocks);
  QList<TemplateNodeBlock> *list;
  for (di.toFirst();(list=di.current());++di)
  {
    QListIterator<TemplateNodeBlock> li(*list);
    TemplateNodeBlock *nb;
    for (li.toFirst();(nb=li.current());++li)
    {
      add(nb);
    }
  }
}

void TemplateBlockContext::clear()
{
  m_blocks.clear();
}

void TemplateBlockContext::push(TemplateNodeBlock *block)
{
  QList<TemplateNodeBlock> *list = m_blocks.find(block->name());
  if (list==0)
  {
    list = new QList<TemplateNodeBlock>;
    m_blocks.insert(block->name(),list);
  }
  list->append(block);
}


//----------------------------------------------------------

/** @brief Lexer class for turning a template into a list of tokens */
class TemplateLexer
{
  public:
    TemplateLexer(const TemplateEngine *engine,const QCString &fileName,const QCString &data);
    void tokenize(QList<TemplateToken> &tokens);
  private:
    void addToken(QList<TemplateToken> &tokens,
                  const char *data,int line,int startPos,int endPos,
                  TemplateToken::Type type);
    void reset();
    const TemplateEngine *m_engine;
    QCString m_fileName;
    QCString m_data;
};

TemplateLexer::TemplateLexer(const TemplateEngine *engine,const QCString &fileName,const QCString &data) :
  m_engine(engine), m_fileName(fileName), m_data(data)
{
}

void TemplateLexer::tokenize(QList<TemplateToken> &tokens)
{
  enum LexerStates
  {
    StateText,
    StateBeginTemplate,
    StateTag,
    StateEndTag,
    StateComment,
    StateEndComment,
    StateMaybeVar,
    StateVariable,
    StateEndVariable
  };

  const char *p=m_data.data();
  int  state=StateText;
  int  pos=0;
  int  lastTokenPos=0;
  int  startLinePos=0;
  bool emptyOutputLine=TRUE;
  int  line=1;
  char c;
  int  markStartPos=-1;
  for (;(c=*p);p++,pos++)
  {
    switch (state)
    {
      case StateText:
        if (c=='{') // {{ or {% or {# or something else
        {
          state=StateBeginTemplate;
        }
        else if (c!=' ' && c!='\t' && c!='\n') // non-whitepace text
        {
          emptyOutputLine=FALSE;
        }
        break;
      case StateBeginTemplate:
        switch (c)
        {
          case '%': // {%
            state=StateTag;
            markStartPos=pos-1;
            break;
          case '#': // {#
            state=StateComment;
            markStartPos=pos-1;
            break;
          case '{': // {{
            state=StateMaybeVar;
            markStartPos=pos-1;
            break;
          default:
            state=StateText;
            emptyOutputLine=FALSE;
            break;
        }
        break;
      case StateTag:
        if (c=='\n')
        {
          warn(m_fileName,line,"unexpected new line inside {%%...%%} block");
          m_engine->printIncludeContext(m_fileName,line);
        }
        else if (c=='%') // %} or something else
        {
          state=StateEndTag;
        }
        break;
      case StateEndTag:
        if (c=='}') // %}
        {
          // found tag!
          state=StateText;
          addToken(tokens,m_data.data(),line,lastTokenPos,
                   emptyOutputLine ? startLinePos : markStartPos,
                   TemplateToken::Text);
          addToken(tokens,m_data.data(),line,markStartPos+2,
                   pos-1,TemplateToken::Block);
          lastTokenPos = pos+1;
        }
        else // something else
        {
          if (c=='\n')
          {
            warn(m_fileName,line,"unexpected new line inside {%%...%%} block");
            m_engine->printIncludeContext(m_fileName,line);
          }
          state=StateTag;
        }
        break;
      case StateComment:
        if (c=='\n')
        {
          warn(m_fileName,line,"unexpected new line inside {#...#} block");
          m_engine->printIncludeContext(m_fileName,line);
        }
        else if (c=='#') // #} or something else
        {
          state=StateEndComment;
        }
        break;
      case StateEndComment:
        if (c=='}') // #}
        {
          // found comment tag!
          state=StateText;
          addToken(tokens,m_data.data(),line,lastTokenPos,
                   emptyOutputLine ? startLinePos : markStartPos,
                   TemplateToken::Text);
          lastTokenPos = pos+1;
        }
        else // something else
        {
          if (c=='\n')
          {
            warn(m_fileName,line,"unexpected new line inside {#...#} block");
            m_engine->printIncludeContext(m_fileName,line);
          }
          state=StateComment;
        }
        break;
      case StateMaybeVar:
        switch (c)
        {
          case '#': // {{#
            state=StateComment;
            markStartPos=pos-1;
            break;
          case '%': // {{%
            state=StateTag;
            markStartPos=pos-1;
            break;
          default:  // {{
            state=StateVariable;
            break;
        }
        break;
      case StateVariable:
        if (c=='\n')
        {
          warn(m_fileName,line,"unexpected new line inside {{...}} block");
          m_engine->printIncludeContext(m_fileName,line);
        }
        else if (c=='}') // }} or something else
        {
          state=StateEndVariable;
        }
        break;
      case StateEndVariable:
        if (c=='}') // }}
        {
          // found variable tag!
          state=StateText;
          addToken(tokens,m_data.data(),line,lastTokenPos,
                   emptyOutputLine ? startLinePos : markStartPos,
                   TemplateToken::Text);
          addToken(tokens,m_data.data(),line,markStartPos+2,
                   pos-1,TemplateToken::Variable);
          lastTokenPos = pos+1;
        }
        else // something else
        {
          if (c=='\n')
          {
            warn(m_fileName,line,"unexpected new line inside {{...}} block");
            m_engine->printIncludeContext(m_fileName,line);
          }
          state=StateVariable;
        }
        break;
    }
    if (c=='\n') // new line
    {
      state=StateText;
      startLinePos=pos+1;
      // if the current line only contain commands and whitespace,
      // then skip it in the output by moving lastTokenPos
      if (markStartPos!=-1 && emptyOutputLine) lastTokenPos = startLinePos;
      // reset markers
      markStartPos=-1;
      line++;
      emptyOutputLine=TRUE;
    }
  }
  if (lastTokenPos<pos)
  {
    addToken(tokens,m_data.data(),line,
             lastTokenPos,pos,
             TemplateToken::Text);
  }
}

void TemplateLexer::addToken(QList<TemplateToken> &tokens,
                             const char *data,int line,
                             int startPos,int endPos,
                             TemplateToken::Type type)
{
  if (startPos<endPos)
  {
    int len = endPos-startPos+1;
    QCString text(len+1);
    qstrncpy(text.data(),data+startPos,len);
    text[len]='\0';
    if (type!=TemplateToken::Text) text = text.stripWhiteSpace();
    tokens.append(new TemplateToken(type,text,line));
  }
}

//----------------------------------------------------------

TemplateParser::TemplateParser(const TemplateEngine *engine,
                               const QCString &templateName,
                               QList<TemplateToken> &tokens) :
   m_engine(engine), m_templateName(templateName), m_tokens(tokens)
{
}

void TemplateParser::parse(
                     TemplateNode *parent,int line,const QStrList &stopAt,
                     QList<TemplateNode> &nodes)
{
  TRACE(("{TemplateParser::parse\n"));
  // process the tokens. Build node list
  while (hasNextToken())
  {
    TemplateToken *tok = takeNextToken();
    //printf("%p:Token type=%d data='%s' line=%d\n",
    //       parent,tok->type,tok->data.data(),tok->line);
    switch(tok->type)
    {
      case TemplateToken::Text:
        nodes.append(new TemplateNodeText(this,parent,tok->line,tok->data));
        break;
      case TemplateToken::Variable: // {{ var }}
        nodes.append(new TemplateNodeVariable(this,parent,tok->line,tok->data));
        break;
      case TemplateToken::Block:    // {% tag %}
        {
          QCString command = tok->data;
          int sep = command.find(' ');
          if (sep!=-1)
          {
            command=command.left(sep);
          }
          if (stopAt.contains(command))
          {
            prependToken(tok);
            TRACE(("}TemplateParser::parse: stop\n"));
            return;
          }
          QCString arg;
          if (sep!=-1)
          {
            arg = tok->data.mid(sep+1);
          }
          TemplateNode *node = TemplateNodeFactory::instance()->
                               create(command,this,parent,tok->line,arg);
          if (node)
          {
            nodes.append(node);
          }
          else if (command=="empty"          || command=="else"         ||
                   command=="endif"          || command=="endfor"       ||
                   command=="endblock"       || command=="endwith"      ||
                   command=="endrecursetree" || command=="endspaceless" ||
                   command=="endmarkers"     || command=="endmsg"       ||
                   command=="endrepeat"      || command=="elif"         ||
                   command=="endrange")
          {
            warn(m_templateName,tok->line,"Found tag '%s' without matching start tag",command.data());
          }
          else
          {
            warn(m_templateName,tok->line,"Unknown tag '%s'",command.data());
          }
        }
        break;
    }
    delete tok;
  }
  if (!stopAt.isEmpty())
  {
    QStrListIterator it(stopAt);
    const char *s;
    QCString options;
    for (it.toFirst();(s=it.current());++it)
    {
      if (!options.isEmpty()) options+=", ";
      options+=s;
    }
    warn(m_templateName,line,"Unclosed tag in template, expected one of: %s",
        options.data());
  }
  TRACE(("}TemplateParser::parse: last token\n"));
}

bool TemplateParser::hasNextToken() const
{
  return !m_tokens.isEmpty();
}

TemplateToken *TemplateParser::takeNextToken()
{
  return m_tokens.take(0);
}

const TemplateToken *TemplateParser::currentToken() const
{
  return m_tokens.getFirst();
};

void TemplateParser::removeNextToken()
{
  m_tokens.removeFirst();
}

void TemplateParser::prependToken(const TemplateToken *token)
{
  m_tokens.prepend(token);
}

void TemplateParser::warn(const char *fileName,int line,const char *fmt,...) const
{
  va_list args;
  va_start(args,fmt);
  va_warn(fileName,line,fmt,args);
  va_end(args);
  m_engine->printIncludeContext(fileName,line);
}



//----------------------------------------------------------


TemplateImpl::TemplateImpl(TemplateEngine *engine,const QCString &name,const QCString &data)
  : TemplateNode(0)
{
  m_name = name;
  m_engine = engine;
  TemplateLexer lexer(engine,name,data);
  QList<TemplateToken> tokens;
  tokens.setAutoDelete(TRUE);
  lexer.tokenize(tokens);
  TemplateParser parser(engine,name,tokens);
  parser.parse(this,1,QStrList(),m_nodes);
}

void TemplateImpl::render(FTextStream &ts, TemplateContext *c)
{
  if (!m_nodes.isEmpty())
  {
    TemplateNodeExtend *ne = dynamic_cast<TemplateNodeExtend*>(m_nodes.getFirst());
    if (ne==0) // normal template, add blocks to block context
    {
      TemplateContextImpl *ci = dynamic_cast<TemplateContextImpl*>(c);
      TemplateBlockContext *bc = ci->blockContext();
      QListIterator<TemplateNode> li(m_nodes);
      TemplateNode *n;
      for (li.toFirst();(n=li.current());++li)
      {
        TemplateNodeBlock *nb = dynamic_cast<TemplateNodeBlock*>(n);
        if (nb)
        {
          bc->add(nb);
        }
      }
    }
    m_nodes.render(ts,c);
  }
}

//----------------------------------------------------------

/** @brief Private data of the template engine */
class TemplateEngine::Private
{
    class IncludeEntry
    {
      public:
        enum Type { Template, Block };
        IncludeEntry(Type type,const QCString &fileName,const QCString &blockName,int line)
          : m_type(type), m_fileName(fileName), m_blockName(blockName), m_line(line) {}
        Type type() const { return m_type; }
        QCString fileName() const { return m_fileName; }
        QCString blockName() const { return m_blockName; }
        int line() const { return m_line; }

      private:
        Type m_type;
        QCString m_fileName;
        QCString m_blockName;
        int m_line;
    };
  public:
    Private(TemplateEngine *engine) : m_templateCache(17) /*, m_indent(0)*/, m_engine(engine)
    {
      m_templateCache.setAutoDelete(TRUE);
      m_includeStack.setAutoDelete(TRUE);
    }
    Template *loadByName(const QCString &fileName,int line)
    {
      //for (int i=0;i<m_indent;i++) printf("  ");
      //m_indent++;
      //printf("loadByName(%s,%d) {\n",fileName.data(),line);
      m_includeStack.append(new IncludeEntry(IncludeEntry::Template,fileName,QCString(),line));
      Template *templ = m_templateCache.find(fileName);
      if (templ==0)
      {
        QFile f(fileName);
        if (f.open(IO_ReadOnly))
        {
          uint size=f.size();
          char *data = new char[size+1];
          if (data)
          {
            data[size]=0;
            if (f.readBlock(data,f.size()))
            {
              templ = new TemplateImpl(m_engine,fileName,data);
              m_templateCache.insert(fileName,templ);
            }
            delete[] data;
          }
        }
        else
        {
          err("Cound not open template file %s\n",fileName.data());
        }
      }
      return templ;
    }
    void unload(Template * /*t*/)
    {
      //(void)t;
      //m_indent--;
      //for (int i=0;i<m_indent;i++) printf("  ");
      //printf("}\n");
      m_includeStack.removeLast();
    }

    void enterBlock(const QCString &fileName,const QCString &blockName,int line)
    {
      //for (int i=0;i<m_indent;i++) printf("  ");
      //m_indent++;
      //printf("enterBlock(%s,%s,%d) {\n",fileName.data(),blockName.data(),line);
      m_includeStack.append(new IncludeEntry(IncludeEntry::Block,fileName,blockName,line));
    }

    void leaveBlock()
    {
      //m_indent--;
      //for (int i=0;i<m_indent;i++) printf("  ");
      //printf("}\n");
      m_includeStack.removeLast();
    }

    void printIncludeContext(const char *fileName,int line) const
    {
      QListIterator<IncludeEntry> li(m_includeStack);
      li.toLast();
      IncludeEntry *ie=li.current();
      while ((ie=li.current()))
      {
        --li;
        IncludeEntry *next=li.current();
        if (ie->type()==IncludeEntry::Template)
        {
          if (next)
          {
            warn(fileName,line,"  inside template '%s' included from template '%s' at line %d",ie->fileName().data(),next->fileName().data(),ie->line());
          }
        }
        else // ie->type()==IncludeEntry::Block
        {
          warn(fileName,line,"  included by block '%s' inside template '%s' at line %d",ie->blockName().data(),
              ie->fileName().data(),ie->line());
        }
      }
    }

  private:
    QDict<Template> m_templateCache;
    //mutable int m_indent;
    TemplateEngine *m_engine;
    QList<IncludeEntry> m_includeStack;
};

TemplateEngine::TemplateEngine()
{
  p = new Private(this);
}

TemplateEngine::~TemplateEngine()
{
  delete p;
}

TemplateContext *TemplateEngine::createContext() const
{
  return new TemplateContextImpl(this);
}

Template *TemplateEngine::loadByName(const QCString &fileName,int line)
{
  return p->loadByName(fileName,line);
}

void TemplateEngine::unload(Template *t)
{
  p->unload(t);
}

void TemplateEngine::enterBlock(const QCString &fileName,const QCString &blockName,int line)
{
  p->enterBlock(fileName,blockName,line);
}

void TemplateEngine::leaveBlock()
{
  p->leaveBlock();
}

void TemplateEngine::printIncludeContext(const char *fileName,int line) const
{
  p->printIncludeContext(fileName,line);
}
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