#=====================================================
# ScriptObjType.tcl 
# *
# * ALDT (Arnulf's Latex Documentation Tool)
# * A Tcl parser for LaTeX files for generating document output (for example html)
# *
# * Initial parsing of a script
# *
# * Released under same BSD license as Tcl.
# * (Tcl BSD license found at <http://www.tcl.tk/software/tcltk/license.html>)
# *
# * Copyright 2012 Arnulf P. Wiedemann
#=====================================================

namespace eval ::Parser {

::itcl::class ScriptObjType {
  public common oid 0

  private variable id
  private variable debug
  private variable subst_debug

  constructor {} {}
  public method mySelf {}
  public method toString {}
  public method toDebugString {}
  public method setFromAny {obj_ptr flags}
  public method freeInternalRep {obj_ptr}
  public method dupInternalRep {src_ptr dup_ptr}
  public method makeScriptObj {parse_token text}
  public method getScript {obj_ptr}
  public method substSetFromAny {obj_ptr flags}
  public method getSubst {obj_ptr flags}
  public method substObj {subst_obj_ptr res_obj_ptr_ptr flags}
}

  # ==================== ScriptObjType ================================== 
::itcl::body ScriptObjType::constructor {} {
    incr oid
    set id $oid
    set debug 0
    set subst_debug 0
}

  # ==================== mySelf ================================== 
::itcl::body ScriptObjType::mySelf {} {
    String str = "ScriptObjType!"+id+"!";
    return str;
  }

  # ==================== toString =====================================
::itcl::body ScriptObjType::toString {} {
    return mySelf()+"!";
  }

  # ==================== toDebugString =====================================
::itcl::body ScriptObjType::toDebugString {} {
    StringBuffer str = new StringBuffer(mySelf()+"\n");
    return str.toString();
  }

  # ==================== setFromAny ==================================
::itcl::body ScriptObjType::setFromAny {obj_ptr flags} {
    Script script = new Script(interp);
    int line = 1;
    Parse parser = new Parse(interp);

//print("script sFA1!");
    script.text = interp.string_obj_type.getString(obj_ptr);
    script.text_len = interp.string_obj_type.getStringLength(obj_ptr);

//print("sFA1a!"+script.text+"!");
    /* Try to get information about filename / line number */
    if (obj_ptr.obj_type != 0 && obj_ptr.obj_type == OBJ_TYPE_SOURCE) {
      line = obj_ptr.sourceValue_GetLineNumber();
    }

    /* Initially parse the script into tokens (in tokenlist) */
    script.scriptTokenListInit();

//print("script sFA2!");
    parser.parserInit(script.text, script.text_len, line);
    while (! parser.parse_info.eof) {
      int ret = parser.parseScript();
//print("parseScript!"+getTokenString(parser.parse_info.token)+"!"+parser.getText()+"!");
      // FIXME should check ret code here !!!
      if (ret != OK) {
      }
//print("txt!"+parser.getText()+"!");
      script.scriptAddParseToken(parser.parse_info.start, parser.parse_info.end - parser.parse_info.start + 1, parser.parse_info.token, parser.parse_info.line, parser.parse_info.text);
    }
//print("script sFA3!");
    if (parser.parse_result.missing != ' ') {
      script.scriptTokenListFree();
      return ERROR;
    }

    /* Add a final EOF token */
    script.scriptAddParseToken(script.text_len, 0, TOKEN_EOF, 0, script.text);

//print("script sFA4!");
    /* Create the "real" script tokens from the initial token list */
    script.script_object.ref_count = 1;
    script.script_object.line = line;
    if (obj_ptr.obj_type != 0 && obj_ptr.obj_type == OBJ_TYPE_SOURCE) {
      script.script_object.file_name_obj = obj_ptr.sourceValue_GetFileNameObj();
    } else {
      script.script_object.file_name_obj = interp.empty_string_obj;
    }
    script.script_object.file_name_obj.incrRefCount("I_SCRIPT_OBJ_TYPE_1");
//print("script sFA5!");
    script.scriptObjAddTokens();
    /* No longer need the token list */
//print("script sFA6!");
    script.scriptTokenListFree();
    /* Free the old internal rep and set the new one. */
    obj_ptr.freeIntRep();
if (debug != 0) {
    print("SetFromAny!obj_type!"+getObjTypeString(obj_ptr.obj_type)+"!");
}
    obj_ptr.obj_type = OBJ_TYPE_SCRIPT;
//    obj_ptr.setIntRepPtr((Object)script);
    obj_ptr.scriptValue_SetScript(script);
    return OK;
  }

  # ==================== freeInternalRep =====================================
::itcl::body ScriptObjType::freeInternalRep {obj_ptr} {
    print("script freeInternalRep not yet implemented");
  }

  # ==================== duptInternalRep =====================================
::itcl::body ScriptObjType::dupInternalRep {src_ptr dup_ptr} {
    print("script dupInternalRep not yet implemented");
  }

  # ==================== makeScriptObj ==================================
::itcl::body ScriptObjType::makeScriptObj {parse_token text} {
    ApwtclObj obj_ptr;
    int idx = text.substring(parse_token.start, parse_token.start + parse_token.len).indexOf("\\");
    boolean have_backslash = idx >= 0 ? true : false;

//print("HAVEBSL!"+have_backslash+"!"+text.substring(parse_token.start, parse_token.start + parse_token.len)+"!");
    if ((parse_token.token == TOKEN_ESC || parse_token.token == TOKEN_QUOTE_ESC) && have_backslash) {
      /* Convert the backlash escapes . */
//print("HAVEBSL2!"+have_backslash+"!"+text.substring(parse_token.start, parse_token.start + parse_token.len)+"!");
      int len = parse_token.len;
      ArrayList<String> result_str = new ArrayList<String>();
      String str = text.substring(parse_token.start, parse_token.start + parse_token.len);
      len = interp.default_obj.escapeBackslash(result_str, str, len);
      str = result_str.get(0);
      obj_ptr = interp.string_obj_type.newStringObjNoAlloc(str, len, "SCRIPT_OBJ_TYPE_1");
    } else {
      /* REVISIT: Strictly, TOKEN_STR should replace <backslash><newline><whitespace>
       *         with a single space. This is currently not done.
       */
      obj_ptr = interp.string_obj_type.newStringObj(text.substring(parse_token.start, parse_token.start + parse_token.len), parse_token.len, "SCRIPT_OBJ_TYPE_2");

    }
    return obj_ptr;
  }

  # ==================== getScript ================================== 
::itcl::body ScriptObjType::getScript {obj_ptr} {
    int script_flags = 0;
    if (obj_ptr.obj_type == OBJ_TYPE_SCRIPT) {
      Script script = obj_ptr.scriptValue_GetScript();
      script_flags = script.script_object.subst_flags;
    }
    if ((obj_ptr.obj_type == 0) || (obj_ptr.obj_type != OBJ_TYPE_SCRIPT) || (script_flags != 0)) {
      if (setFromAny(obj_ptr, 0) != OK) {
        return null;
      }
    }
    return obj_ptr.scriptValue_GetScript();
  }

  # ==================== substSetFromAny ==================================
  # The subst object type reuses most of the data structures and functions
  # of the script object. Script's data structures are a bit more complex
  # for what is needed for [subst]itution tasks, but the reuse helps to
  # deal with a single data structure at the cost of some more memory
  # usage for substitutions. 
  #
  # This method takes the string representation of an object
  # as a Tcl string where to perform [subst]itution, and generates
  # the pre-parsed internal representation. 
::itcl::body ScriptObjType::substSetFromAny {obj_ptr flags} {
    Script script = new Script(interp);
    int line = 1;
    Parse parser = new Parse(interp);
    script.text = obj_ptr.getString();
    script.text_len = obj_ptr.getStringLength();

    /* Initially parse the script into tokens (in tokenlist) */
    script.scriptTokenListInit();
//print("substSetFromAny!"+obj_ptr+"!");
    parser.parserInit(script.text, script.text_len, line);
    boolean had_tokens = false;
    while (true) {
      parser.parseSubst(flags);
      if (parser.parse_info.eof) {
        /* Note that subst doesn't need the EOL token */
    	if (script.text_len == 1 && !had_tokens) {
          /* special case of only one character to parse */
    	  script.scriptAddParseToken(parser.parse_info.start, parser.parse_info.end - parser.parse_info.start + 1, TOKEN_ESC, parser.parse_info.line, parser.parse_info.text);
    	} else {
    	  if (!had_tokens && script.text_len > 1) {
        	  script.scriptAddParseToken(parser.parse_info.start, parser.parse_info.end - parser.parse_info.start + 1, parser.parse_info.token, parser.parse_info.line, parser.parse_info.text);    		  
    	  }
    	}
        break;
      }
if (subst_debug > 0) {
print("sSFA!"+Token.getTokenString(parser.parse_info.token)+"!"+parser.getText()+"!");
}
      script.scriptAddParseToken(parser.parse_info.start, parser.parse_info.end - parser.parse_info.start + 1, parser.parse_info.token, parser.parse_info.line, parser.parse_info.text);
      had_tokens = true;
    }


    /* Create the "real" subst/script tokens from the initial token list */
    script.script_object.ref_count = 1;
    script.script_object.subst_flags = flags;
    script.script_object.file_name_obj = interp.empty_string_obj;
    script.script_object.file_name_obj.incrRefCount("I_SCRIPT_OBJ_TYPE_2");
    script.substObjAddTokens(0);

    /* No longer need the token list */
    script.scriptTokenListFree();

    /* Free the old internal rep and set the new one. */
    obj_ptr.freeIntRep();
    obj_ptr.setIntRepPtr(script);
    obj_ptr.obj_type = OBJ_TYPE_SCRIPT;
    return OK;
  }

  # ==================== getSubst ==================================
::itcl::body ScriptObjType::getSubst {obj_ptr flags} {
    int script_flags = 0;
    if (obj_ptr.obj_type == OBJ_TYPE_SCRIPT) {
      Script script = obj_ptr.scriptValue_GetScript();
      script_flags = script.script_object.subst_flags;
    }
    if ((obj_ptr.obj_type != OBJ_TYPE_SCRIPT) || (script_flags != flags)) {
      substSetFromAny(obj_ptr, flags);
    }
    return (Script)obj_ptr.getIntRepPtr();
}

  # ==================== substObj ================================== */
  # Performs commands,variables,blackslashes substitution,
  # storing the result object (with refcount 0) into
  #res_obj_ptr_ptr. 

::itcl::body ScriptObjType::substObj {subst_obj_ptr res_obj_ptr_ptr flags} {
    Script script = getSubst(subst_obj_ptr, flags);
    
    subst_obj_ptr.incrRefCount("I_SCRIPT_OBJ_TYPE_3");      /* Make sure it's shared. */
    /* In order to preserve the internal rep, we increment the
     * ref_count field of the script internal rep structure. 
     */
    script.script_object.ref_count++;
//print("substObj!"+script.script_object.len+"!"+script.toDebugString()+"!");
    res_obj_ptr_ptr.add(interp.eval_statement.interpolateTokens(script, 0, script.script_object.len, flags));
    script.script_object.ref_count--;
    subst_obj_ptr.decrRefCount("D_SCRIPT_OBJ_TYPE_1");
    if (res_obj_ptr_ptr.get(0) == null) {
      return false
    }
    return true
  }

}