unit frmLuaEngineUnit;

{$mode delphi}

interface

uses
  {$ifdef darwin}
  macport, LCLIntf, LCLProc, Unix, registry, xmlreg,
  {$endif}
  {$ifdef windows}
  windows,
  {$endif}
  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics,
  Dialogs, StdCtrls, Menus, ExtCtrls, SynMemo, SynCompletion, SynEdit, lua,
  lauxlib, lualib, LuaSyntax, luahandler, CEFuncProc, sqldb, strutils,
  InterfaceBase, ComCtrls, SynGutterBase, SynEditMarks, PopupNotifier, ActnList,
  SynEditHighlighter, AvgLvlTree, math, LazFileUtils, Types, LCLType,
  pluginexports, SynEditKeyCmds, betterControls;

type

  { TfrmLuaEngine }

  TfrmLuaEngine = class(TForm)
    btnExecute: TButton;
    FindDialog1: TFindDialog;
    GroupBox1: TGroupBox;
    leImageList: TImageList;
    miDebug: TMenuItem;
    miFind: TMenuItem;
    miRedo: TMenuItem;
    MenuItem15: TMenuItem;
    N1: TMenuItem;
    miAutoComplete: TMenuItem;
    miSaveCurrentScriptAs: TMenuItem;
    miShowScriptInOutput: TMenuItem;
    miResizeOutput: TMenuItem;
    miSetBreakpoint: TMenuItem;
    miRun: TMenuItem;
    miSingleStep: TMenuItem;
    scLuaCompleter: TSynCompletion;
    ToolButton1: TToolButton;
    tbStopDebug: TToolButton;
    tShowHint: TIdleTimer;
    ilLuaDebug: TImageList;
    ilSyneditDebug: TImageList;
    MainMenu1: TMainMenu;
    miUndo: TMenuItem;
    MenuItem11: TMenuItem;
    MenuItem4: TMenuItem;
    MenuItem5: TMenuItem;
    miFindReplace: TMenuItem;
    miView: TMenuItem;
    cbShowOnPrint: TMenuItem;
    miCut: TMenuItem;
    miCopy: TMenuItem;
    miPaste: TMenuItem;
    mOutput: TMemo;
    MenuItem1: TMenuItem;
    MenuItem2: TMenuItem;
    MenuItem3: TMenuItem;
    mScript: TSynEdit;
    OpenDialog1: TOpenDialog;
    Panel1: TPanel;
    Panel2: TPanel;
    Panel3: TPanel;
    pmEditor: TPopupMenu;
    dlgReplace: TReplaceDialog;
    SaveDialog1: TSaveDialog;
    Splitter1: TSplitter;
    tbDebug: TToolBar;
    tbRun: TToolButton;
    tbSingleStep: TToolButton;
    procedure btnExecuteClick(Sender: TObject);
    procedure cbShowOnPrintClick(Sender: TObject);
    procedure dlgReplaceFind(Sender: TObject);
    procedure dlgReplaceReplace(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure miUndoClick(Sender: TObject);
    procedure MenuItem11Click(Sender: TObject);
    procedure miFindClick(Sender: TObject);
    procedure miRedoClick(Sender: TObject);
    procedure MenuItem15Click(Sender: TObject);
    procedure MenuItem2Click(Sender: TObject);
    procedure MenuItem3Click(Sender: TObject);
    procedure MenuItem5Click(Sender: TObject);
    procedure miFindReplaceClick(Sender: TObject);
    procedure miCutClick(Sender: TObject);
    procedure miCopyClick(Sender: TObject);
    procedure miPasteClick(Sender: TObject);
    procedure miResizeOutputClick(Sender: TObject);
    procedure miSaveCurrentScriptAsClick(Sender: TObject);
    procedure miSetBreakpointClick(Sender: TObject);
    procedure miShowScriptInOutputClick(Sender: TObject);
    procedure mScriptChange(Sender: TObject);
    procedure mScriptGutterClick(Sender: TObject; X, Y, Line: integer;
      mark: TSynEditMark);
    procedure mScriptKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState
      );
    procedure mScriptKeyPress(Sender: TObject; var Key: char);
    procedure mScriptMouseEnter(Sender: TObject);
    procedure mScriptMouseLeave(Sender: TObject);
    procedure mScriptMouseLink(Sender: TObject; X, Y: Integer;
      var AllowMouseLink: Boolean);
    procedure mScriptMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure mScriptShowHint(Sender: TObject; HintInfo: PHintInfo);
    procedure Panel2Resize(Sender: TObject);
    procedure scLuaCompleterCodeCompletion(var Value: string;
      SourceValue: string; var SourceStart, SourceEnd: TPoint;
      KeyChar: TUTF8Char; Shift: TShiftState);
    procedure scLuaCompleterExecute(Sender: TObject);
    procedure scLuaCompleterKeyCompletePrefix(Sender: TObject);
    procedure scLuaCompleterPositionChanged(Sender: TObject);
    procedure scLuaCompleterSearchPosition(var APosition: integer);
    procedure SQLConnector1AfterConnect(Sender: TObject);
    procedure tbRunClick(Sender: TObject);
    procedure tbSingleStepClick(Sender: TObject);
    procedure tbStopDebugClick(Sender: TObject);
    procedure tShowHintTimer(Sender: TObject);
  private
    { private declarations }
    CompleterInvokedByDot: boolean;
    loadedFormPosition: boolean;
    hintwindow:THintWindow;
    continuemethod: integer;
    AutoCompleteStartLine: string;
    adjustedsize: boolean;
    procedure ContinueAutoComplete;
    procedure ContinueAutoComplete2(Sender: TObject);
  public
    { public declarations }
    synhighlighter: TSynLuaSyn;
    procedure reloadHighlighterSettings;
  end;

procedure ReloadAllLuaEngineHighlighters;

var
  frmLuaEngine: TfrmLuaEngine;

implementation

{ TfrmLuaEngine }

uses LuaClass, SynPluginMultiCaret, SynEditTypes, globals, DPIHelper, frmSyntaxHighlighterEditor,
  frmautoinjectunit, mainunit2, TypInfo;

resourcestring
  rsError = 'Script Error';
  rsLEErrorInLine = 'Error in line ';
  rsLEUndefinedError = 'Undefined error';
  rsLEOnlyOneScriptCanBeDebuggedAtATimeEtc = 'Only one script can be debugged at a time. Continue executing this script without the debugger?';
  rsLEUserClickedStop = 'User clicked stop';
  rsLuaEngine = 'Lua Engine';

var
  LuaDebugForm: TfrmLuaEngine;
  LuaDebugSingleStepping: boolean;
  LuaDebugInfo: Plua_Debug;
  LuaDebugVariables: TStringToStringTree;
  LuaDebugSource: pointer;

procedure ReloadAllLuaEngineHighlighters;
var
  i: integer;
  f: TCustomForm;
  lef: TfrmLuaEngine absolute f;
begin
  for i:=0 to screen.FormCount-1 do
  begin
    f:=screen.Forms[i];
    if f is TfrmLuaEngine then
      lef.reloadHighlighterSettings;
  end;

end;

procedure TfrmLuaEngine.Panel2Resize(Sender: TObject);
begin
  btnexecute.Height:=panel2.clientheight-(2*btnexecute.top);
end;

procedure TfrmLuaEngine.ContinueAutoComplete;
var p,p2: tpoint;
begin

  p:=mscript.RowColumnToPixels(point(mscript.CaretX,mscript.CaretY+1));
  p2:=mscript.ClientToScreen(point(0,0));
  scLuaCompleter.Execute('.',p2+p);
end;

procedure TfrmLuaEngine.ContinueAutoComplete2(sender: TObject);
begin
  ContinueAutoComplete;
  ttimer(sender).enabled:=false;
  ttimer(sender).free;
end;

procedure TfrmLuaEngine.scLuaCompleterCodeCompletion(var Value: string;
  SourceValue: string; var SourceStart, SourceEnd: TPoint; KeyChar: TUTF8Char;
  Shift: TShiftState);
var t: TTimer;
begin
  if keychar='.' then
  begin
    value:=value+'.';

//    TThread.Queue(nil, ContinueAutoComplete);
    t:=TTimer.Create(self);
    t.interval:=1;
    t.OnTimer:=ContinueAutoComplete2;
    t.enabled:=true;
  end
  else
  if keychar='(' then
  begin
    //keep the sourcevalue as well
    SourceEnd.x:=SourceStart.x+length(value);
    value:=value+'(';


  end
  else
  if keychar='=' then
  begin
    SourceEnd.x:=SourceStart.x+length(value);
    value:=value+'=';
  end;


end;

function ParseStringForPath(s: string; var extra: string): string;
var
  identchars: TSynIdentChars;
  identchars2: TSynIdentChars;
  i: integer;
  start,stop: integer;

  r: string;
begin
  identchars:=['.','a'..'z','A'..'Z','0'..'9','_','[',']'];

  extra:='';
  if s='' then exit('');

  r:='';
  for i:=length(s) downto 1 do
    if s[i] in identchars then
      r:=s[i]+r
    else
      break;

  i:=RPos('.',r);
  if i=0 then
  begin
    extra:=r;
    exit('_G');
  end;

  extra:=copy(r,i+1);
  exit(copy(r,1,i-1));

end;

procedure TfrmLuaEngine.scLuaCompleterExecute(Sender: TObject);
var
  s,s2,extra: string;
  w: tpoint;
  i,j,si: integer;
  start: integer;

  identchars: TSynIdentChars;
  identchars2: TSynIdentChars;

  properties: Tstringlist;
  methods: Tstringlist;

  temp: TStringlist;
  L: Plua_State;

  o: TObject;
  c: TComponent absolute o;

  f: boolean;

  pp: pproplist;
begin

  scLuaCompleter.ItemList.Clear;

  L:=luavm;


  //parse the symbol the cursor is at
  s:=mscript.LineText;
  if CompleterInvokedByDot then
  begin
    Insert('.',s,mscript.CaretX);
    s:=copy(s,1,mscript.CaretX);
  end
  else
    s:=copy(s,1,mscript.CaretX-1);

  CompleterInvokedByDot:=false;


  s:=ParseStringForPath(s,extra);


  try
    if luaL_loadstring(L,pchar('return '+s))=0 then
    begin
      try
        if lua.lua_pcall(L, 0,1,0)=0 then
        begin
          //figure out what it returned

          properties:=tstringlist.create;
          properties.CaseSensitive:=false;


          methods:=tstringlist.create;
          methods.CaseSensitive:=false;

          case lua_type(L, -1) of


            LUA_TUSERDATA:
            begin
              o:=lua_ToCEUserData(L, -1);

              if lua_getmetatable(L,-1)<>0 then
              begin
                i:=lua_gettop(L);
                lua_pushnil(L);
                while lua_next(L,i)<>0 do
                begin
                  s:=Lua_ToString(L,-2);

                  if (s<>'') and (s[1]<>'_') then
                  begin
                    if lua_type(L, -1)=LUA_TFUNCTION then
                    begin
                      j:=methods.IndexOf(s);
                      if j<>-1 then
                      begin
                        //prefer the lowercase version
                        if s[1] in ['a'..'z'] then
                          methods[j]:=s; //swap
                        end
                        else
                          methods.add(s);
                    end
                    else
                    begin
                      j:=properties.IndexOf(s);
                      if j<>-1 then
                      begin
                        //prefer the uppercase version
                        if s[1] in ['A'..'Z'] then
                          properties[j]:=s; //swap
                      end
                      else
                        properties.add(s);

                    end;

                  end;

                  lua_pop(L,1);
                end;
              end;


              lua_pop(L,1);

              if o is tcomponent then
                for i:=0 to c.ComponentCount-1 do
                begin
                  if c.Components[i].Name<>'' then
                    properties.Add(c.Components[i].Name);
                end;

              pp:=nil;
              i:=GetPropList(c, pp);
              if i>0 then
                for j:=0 to i-1 do
                  properties.Add(pp^[j].Name);

              if pp<>nil then
                freememandnil(pp);

            end;

            LUA_TTABLE:
            begin
              i:=lua_gettop(L);
              lua_pushnil(L);

              properties.Duplicates:=dupIgnore;
              properties.Sorted:=true;

              while lua_next(L,i)<>0 do
              begin
                if lua_type(L,-2)=LUA_TSTRING then
                begin
                  s:=Lua_ToString(L,-2);
                  if length(s)>1 then
                  begin
                    if lua_isfunction(L,-1) then
                    begin
                      if lua_iscfunction(L,-1) then  //should be the case, but some people don't use the designated functions
                      begin
                        s2:=s;
                        s2[1]:=lowercase(s2[1]);
                        if s2[1]<>s[1] then
                        begin
                          //check if it does have a duplicate
                          lua_pushstring(L,s2);
                          lua_gettable(L,i);
                          if lua_isnil(L,-1)=false then //has duplicate
                            s[1]:=lowercase(s[1]);

                          lua_pop(L,1);
                        end;
                      end;
                    end;

                    properties.Add(s);
                  end;
                end;

                lua_pop(L,1);
              end;
            end;

            else
            begin
              outputdebugstring(pchar('unknown lua type: '+inttostr(lua_type(L, -1))));
            end;

          end;

          methods.Sort;
          properties.Sort;

          scLuaCompleter.ItemList.Assign(properties); //first properties
          scLuaCompleter.ItemList.AddStrings(methods);


          methods.free;
          properties.free;

          lua_pop(L,1);
        end
      finally;
        i:=lua_gettop(L);
        lua_pop(L,i);
      end;
    end;

    scLuaCompleter.CurrentString:=extra;
  except
    //on e:exception do
   //   messagedlg(e.message,mtError,[mbok],0);
  end;
end;

procedure TfrmLuaEngine.scLuaCompleterKeyCompletePrefix(Sender: TObject);
begin

end;

procedure TfrmLuaEngine.scLuaCompleterPositionChanged(Sender: TObject);
begin

end;

procedure TfrmLuaEngine.scLuaCompleterSearchPosition(var APosition: integer);
var
  s,s2: string;
  i,p: integer;
  start: integer;
begin
  //get the text from the end till the first .

  s:=uppercase(scLuaCompleter.CurrentString);

  if scLuaCompleter.ItemList.count=0 then
    exit;


  if s='' then exit;

  if s[1]='.' then
    s:=uppercase(copy(s,2,length(s)))
  else
    s:=uppercase(s);

  //outputdebugstring(pchar(s));


  for i:=0 to scLuaCompleter.ItemList.count-1 do
  begin
    s2:=uppercase(scLuaCompleter.ItemList[i]);

    p:=pos(s,s2);
    if p=1 then
    begin
      scLuaCompleter.Position:=i-1;

      APosition:=i;
      exit;
    end;
  end;

  aposition:=-1;
end;

procedure TfrmLuaEngine.SQLConnector1AfterConnect(Sender: TObject);
begin

end;

procedure TfrmLuaEngine.tbRunClick(Sender: TObject);
begin
  if tbdebug.visible and tbrun.enabled and tbrun.visible then
  begin
    continuemethod:=1;
    tbDebug.enabled:=false;
    tbRun.enabled:=false;
    tbSingleStep.enabled:=false;
    tbStopDebug.enabled:=false;
  end
  else
  begin
    if btnExecute.enabled then
      btnExecute.click;
  end;
end;

procedure TfrmLuaEngine.tbSingleStepClick(Sender: TObject);
begin
  if tbdebug.visible and tbSingleStep.Enabled and tbSingleStep.Visible then
  begin
    continuemethod:=2;
    tbDebug.enabled:=false;
    tbRun.enabled:=false;
    tbSingleStep.enabled:=false;
    tbStopDebug.enabled:=false;
  end;
end;

procedure TfrmLuaEngine.tbStopDebugClick(Sender: TObject);
begin
  if tbdebug.visible and tbStopDebug.Enabled and tbStopDebug.Visible then
  begin
    continuemethod:=3;
    tbDebug.enabled:=false;
    tbRun.enabled:=false;
    tbSingleStep.enabled:=false;
    tbStopDebug.enabled:=false;
  end;
end;



function findToken(s: string; var start: integer):string;
var i: integer;
begin
  result:='';
  for i:=start to length(s) do
  begin

    if (i<length(s)) and (s[i] in ['a'..'z','A'..'Z','0'..'9','_']) then
      continue
    else
    begin
      if i=length(s) then
        result:=copy(s, start, i-start+1)
      else
        result:=copy(s, start, i-start);

      start:=i;
      break;
    end;
  end;
end;

function getObject(s: string): boolean;
var
  index: integer;
  token: string;
  nextArray: boolean;

  name: pchar;

  i: integer;
begin
  result:=false;
  //parse through the string's tokens.

  //first find the first token and look it up in the local and global tables
  index:=1;
  nextArray:=false;
  token:=findToken(s, index);

  i:=1;
  repeat     //lookup in the local's
    name:=lua_getlocal(Luavm, LuaDebugInfo, i);
    if name<>nil then
    begin
      if (name=token) then
      begin
        if lua_isnil(Luavm,-1) then
        begin
          lua_pop(LuaVM,1);
          inc(i);
          continue;
        end;

        result:=true;
        break;   //leave the value on the stack
      end
      else
      begin
        lua_pop(LuaVM, 1);
        inc(i);
      end;
    end;
  until name=nil;



  if result=false then
  begin
    //try global
    lua_getglobal(luavm, pchar(token));
    if lua_isnil(LuaVM,-1) then
      lua_pop(luavm, 1)
    else
      result:=true; //keep this object in the stack
  end;

  if not result then exit; //nothing found


  while index<length(s) do
  begin
    if s[index]='[' then
    begin
      //handle an array element access. Not implemented right now.  Stuff that should work if implemented: x.y[123+bla[12+x[67]]].xxx
      lua_pop(luavm,1); //remove the last object
      result:=false;
      exit; //fail
    end;

    if s[index]='.' then
      inc(index);

    token:=findToken(s,index);
    //query the current object at the top of the stack for this field

    i:=lua_gettop(Luavm);
    lua_pushstring(luavm, token);
    lua_gettable(luavm, i);

    if lua_isnil(Luavm,-1) then
    begin
      result:=false; //nil
      lua_pop(luavm,2); //pop of this nil value, and the previous object
      exit;
    end;

    //still here so an object has been pushed on the stack
    lua_remove(luavm, i); //not needed anymore



  end;
end;

procedure TfrmLuaEngine.tShowHintTimer(Sender: TObject);
var r: trect;
  description: string;
  p,p2,p3: tpoint;
  token: string;
  attr: TSynHighlighterAttributes;
  o: TObject;

  stop, start: integer;
  i: integer;
  line: string;
  s: string;
  found: boolean;
  foundcount: integer; //the number of pops needed to balance the stack


begin
  if (LuaDebugForm=self) and (GetForegroundWindow=handle) then
  begin
    //figure out what is currently focused by the mouse
    p:=mouse.cursorpos;

    p2:=mScript.ScreenToClient(p);
    if p2.x<mscript.Gutter.Width then exit; //gutter stuff

    p3:=mscript.PixelsToLogicalPos(p2);

    mscript.GetHighlighterAttriAtRowCol(p3, token, attr);

    if (attr=synhighlighter.IdentifierAttri) or (attr=synhighlighter.KeyAttri) then
    begin

      line:=mscript.lines[p3.y-1];
      mscript.GetWordBoundsAtRowCol(p3, start, stop);

     // token:=mscript.GetWordAtRowCol(p3);

      //find the actual start
      for i:=p3.x downto 1 do
      begin
        if i=1 then
        begin
          if line[1] in ['a'..'z','A'..'Z','0'..'9','_','[',']','''','"','.'] then
            start:=1
          else
            start:=2;

          break;
        end;

        if line[i] in ['a'..'z','A'..'Z','0'..'9','_','[',']','''','"','.'] then
          continue
        else
        begin
          start:=i+1;
          break;
        end;
      end;

      //and stop           (else bla~= will be seen as bla~)
      while (stop>start) do
        if line[stop-1] in ['a'..'z','A'..'Z','0'..'9','_','[',']','''','"','.'] then
          break
        else
          dec(stop);

      token:=copy(line,start, stop-start);
      if getObject(token) then
      begin
        description:=LuaValueToDescription(LuaVM, -1);
        lua_pop(Luavm,1);
      end
      else
        description:='nil';


      //parse the first word and find out if it's a global or local start
      //token:=findToken(line, start);

     {
      if length(token)>1 then
      begin
        if token[length(token)] = '~' then //~ is not part of the token...
          token:=copy(token, 1, length(token)+1);
      end;


      mscript.GetWordBoundsAtRowCol(p3, start, stop);
      if (start>1) and (line[start-1]='.') then //check if it starts with a . and if so, do table lookups using the parent(s)
      begin

        last:=start-2;

        for i:=start-2 downto 1 do       //trace back till you find the start of the line or a seperator
        begin
          if i=1 then
          begin
            s:=copy(line, 1, last);
            path.Insert(0, s);
          end;

          if line[i] in ['a'..'z','A'..'Z','0'..'9','_'] then
            continue;

          if line[i]='.' then
          begin
            s:=copy(line, i+1, last-i);
            path.Insert(0, s);
            last:=i-1;
          end
          else
          if line[i]=']' then
          begin
            //array element encounterd
          end
          else
            break; //seperator encountered
        end;
      end;





      token:='';
      description:='nil';
      foundcount:=0;

      for i:=0 to path.Count-1 do
      begin
        if token='' then
          token:=path[i]
        else
          token:=token+'.'+path[i];

        found:=false;

        if i=0 then //get it from global or local
        begin
          repeat
            name:=lua_getlocal(L, ar, i);
            if name<>nil then
            begin
              if (name=path[0]) then
              begin
                found:=true;
                break;
              end
              else
              begin
                lua_pop(L, 1);
                inc(i);
              end;
            end;
          until name=nil;

          if not found then
          begin
            //try global
            lua_getfield(LuaVM, LUA_GLOBALSINDEX, pchar(path[0]));
            if lua_isnil(LuaVM,-1) then
              lua_pop(luavm, 1)
            else
              found:=true; //keep this object in the stack

            if not found then
              break;
          end;

          if found then
            inc(foundcount);

        end;

        if foundcount>0 then
        begin
          if i=path.count-1 then
          begin
            //last one
            description:=LuaValueToDescription(LuaVM, -1);
          end
          else
          begin
            //get more paths
            lua_getfield();

          end;
        end;





        //description:=LuaDebugVariables[token];

        if description='' then //check if it's a global
        begin
          //look up
          LuaCS.Enter;
          try
            lua_getfield(LuaVM, LUA_GLOBALSINDEX, pchar(token));
            if lua_isnil(LuaVM,-1) then
              description:='nil'
            else
              description:=LuaValueToDescription(LuaVM, -1)+' (global)';

            lua_pop(luavm, 1);
          finally
            luacs.Leave;
          end;

          if description='' then
          begin
            description:=' ';
            LuaDebugVariables.Add(token, description); //could not be found
          end;
        end;


      end;



      path.free;  }

      if description=' ' then
      begin
        //means nothing was found
        exit;
      end;

      if hintwindow=nil then
        hintwindow:=THintWindow.Create(self);

      description:=token+' = '+description;

      r:=hintwindow.CalcHintRect(mscript.width, description, nil);


      r.Top:=r.top+p.y;
      r.Left:=r.left+p.x;
      r.Right:=r.right+p.x;
      r.Bottom:=r.Bottom+p.y;

      hintwindow.ActivateHint(r, description);
    end;
  end;

//  mScript.ShowHint:=;
end;

function onerror(L: PLua_State): integer; cdecl;
var ld: lua_Debug;
  frm: TfrmLuaEngine;
  r: integer;
  t: integer;
begin
  //todo: Try to get this to work (might be a lua bug)
  {

  result:=0;
  frm:=luaclass_getClassObject(L);


  t:=lua_gettop(L);

  ZeroMemory(@ld, sizeof(ld));


  r:=lua_getstack(L, 1, @ld);
  if r=1 then
  begin
    lua_getinfo(L, '>l', @ld);
    lua_pushstring(L, rsLEErrorInLine+inttostr(ld.currentline));
  end
  else
    lua_pushstring(L, rsLEUndefinedError);
             }
  result:=1;


end;

function hasLuaBreakpoint(linenumber: integer): boolean;
begin

  result:=LuaDebugSingleStepping or (LuaDebugForm.mScript.Marks.Line[linenumber]<>nil);
end;

procedure LineHook_Handler(L: Plua_State; ar: Plua_Debug);
var i,j: integer;
  s,s2: integer;
  mark: TSynEditMark;

  name: pchar;
  value: string;

  stack: integer;
begin
  LuaDebugForm.continuemethod:=0;

  if MainThreadID<>GetCurrentThreadId then
  begin
    //Only the main thread can be debugged for now
    exit;
  end;


  try
    if lua_getinfo(L,'nSl', ar)<>0 then
    begin
      if LuaDebugSource=nil then
        LuaDebugSource:=ar.source;

      if (ar.source=LuaDebugSource) and (hasLuaBreakpoint(ar.currentline)) then
      begin
        //break
       // frmLuaEngine.visible:=false;
       // frmLuaEngine.ShowModal;
       // frmLuaEngine.show;

        LuaDebugForm.show;
        LuaDebugForm.SetFocus;


        if LuaDebugForm.mScript.Marks.Line[ar.currentline]<>nil then
        begin
          //update the icon for the current line
          if LuaDebugForm.mScript.Marks.Line[ar.currentline][0].ImageIndex = 0 then
            LuaDebugForm.mScript.Marks.Line[ar.currentline][0].ImageIndex:=2;
        end
        else
        begin
          mark:=TSynEditMark.Create(LuaDebugForm.mscript);
          mark.line:=ar.currentline;
          mark.ImageList:=LuaDebugForm.ilSyneditDebug;
          mark.ImageIndex:=1;
          mark.Visible:=true;
          LuaDebugForm.mscript.Marks.Add(mark);
        end;



        LuaDebugForm.show;
        //activate the debug gui
        LuaDebugForm.tbDebug.Visible:=true;
        LuaDebugForm.tbDebug.enabled:=true;
        LuaDebugForm.tbRun.enabled:=true;
        LuaDebugForm.tbSingleStep.enabled:=true;
        LuaDebugForm.tbStopDebug.enabled:=true;
        LuaDebugForm.mScript.ReadOnly:=true;


        LuaDebugForm.mScript.CaretY:=ar.currentline;
        LuaDebugForm.mScript.EnsureCursorPosVisible;

        LuaDebugForm.continuemethod:=0;

        LuaDebugInfo:=ar;
        LuaDebugVariables:=TStringToStringTree.Create(true);

        i:=1;

        repeat
          name:=lua_getlocal(L, ar, i);
          if name<>nil then
          begin
            if copy(name,1,1)<>'(' then  //(*temporary)
            begin
              value:=LuaValueToDescription(L, -1)+' (local)';
              LuaDebugVariables.Add(name, value);
            end;

            lua_pop(L, 1);
            inc(i);

          end;

        until name=nil;




        while LuaDebugForm.continuemethod=0 do
        begin
          try
            application.ProcessMessages;
          except
            if Application.CaptureExceptions then
              Application.HandleException(LuaDebugForm)
            else
              raise;
          end;


          if application.Terminated or (LuaDebugForm.Visible=false) then break;
          application.Idle(true);
        end;

        if application.Terminated then
        begin
          {$ifdef windows}
          ExitProcess(UINT(-1)); //there's nothing to return to...
          {$endif}
          {$ifdef darwin}
          KillThread(GetCurrentThreadId);
          {$endif}
        end;

        LuaDebugForm.mScript.ReadOnly:=false;


        //clear the current instruction pointer
        if LuaDebugForm.mScript.Marks.Line[ar.currentline]<>nil then
        begin
          if LuaDebugForm.mScript.Marks.Line[ar.currentline][0].ImageIndex = 2 then  //bp with the current bp set
            LuaDebugForm.mScript.Marks.Line[ar.currentline][0].ImageIndex:=0  //set back to normal bp
          else
            LuaDebugForm.mScript.Marks.Line[ar.currentline][0].Free; //clear bp


        end;

        LuaDebugSingleStepping:=false;




      end;
  //    frmLuaEngine.moutput.lines.add('called:'+ar.what+' ('+inttostr(ar.currentline)+')');

    end;
  except
    on e:exception do //e.g accessing a local variable to a ce object that got freed
      outputdebugstring(pchar('LineHook_Handler exception:'+e.message));
  end;

end;

procedure LineHook(L: Plua_State; ar: Plua_Debug); cdecl;
begin
  LineHook_Handler(L, ar);

  case LuaDebugForm.continuemethod of
    1: ;//continue (normal bp's only)
    2: LuaDebugSingleStepping:=true;  //single step next instruction
    3:
    begin
      //lua_sethook(L, linehook, 0, 0);
      lua_pushstring(L, rsLEUserClickedStop);
      lua_error(L);
    end;
  end;
end;

procedure TfrmLuaEngine.btnExecuteClick(Sender: TObject);
var pc: pchar;
  i,j,ln: integer;

  oldprintoutput: Tstrings;
  c: tobject;

  err: integer;

  oldstack: integer;
  dodebug: boolean;

  templist: tstringlist;
  pad: string;
begin
  i:=lua_gettop(Luavm);
  if i>0 then
  begin
    OutputDebugString('luastack is not correct');
    lua_settop(Luavm,0);
  end;

  dodebug:=false;

  for i:=0 to mScript.Marks.Count-1 do
    if mscript.Marks[i].ImageIndex=0 then
    begin
      dodebug:=true;
      break;
    end;


  if dodebug then
  begin

    if LuaDebugForm=nil then
    begin
      for i:=0 to mScript.Marks.Count-1 do
        if mscript.Marks[i].ImageIndex=0 then
        begin
          //this script wishes to get debugged
          dodebug:=true;

          LuaDebugForm:=self;
          LuaDebugSingleStepping:=false;

          LuaDebugSource:=nil;

          LuaDebugForm.btnExecute.enabled:=false;

          mscript.OnMouseEnter:=mScriptMouseEnter;
          mscript.OnMouseLeave:=mScriptMouseLeave;

          if LuaDebugVariables<>nil then
            LuaDebugVariables.Clear;

          break;
        end;

    end
    else
    begin
      dodebug:=false;
      if MessageDlg(rsLEOnlyOneScriptCanBeDebuggedAtATimeEtc, mtConfirmation, [mbyes, mbno], 0)<>mryes then exit;
    end;
  end;

  oldstack:=lua_gettop(luavm);

  oldprintoutput:=lua_oldprintoutput;
  try
    if miShowScriptInOutput.checked then
      mOutput.lines.add(mscript.text);


    lua_setPrintOutput(mOutput.lines);

    i:=0;
{    luaclass_newClass(Luavm, self);
    lua_pushcclosure(Luavm, onerror,1);
    err:=lua_gettop(Luavm);

    if luaL_loadstring(Luavm, pchar(mScript.text))=0 then
      i := lua_pcall(Luavm, 0, LUA_MULTRET, err);

     lua_remove(luavm, err); }

    if dodebug then
      lua_sethook(luavm, linehook, LUA_MASKLINE, 0);

    if lua_dostring(Luavm, pchar(mScript.text))=0 then
    begin


      j:=lua_gettop(luavm);
      if j>oldstack then
      begin
        for i:=oldstack+1 to j do
        begin
          templist:=tstringlist.Create;
          templist.text:=LuaValueToDescription(luavm, i);

          for ln:=0 to templist.count-1 do
          begin
            if ln=0 then
              mOutput.lines.add(inttostr(i)+':'+templist[ln])
            else
            begin
              if ln=1 then pad:=padleft('',length(inttostr(i)+':'));

              mOutput.lines.add(pad+templist[ln]);
            end;
          end;

          templist.free;

        end;


      end;
    end
    else
    begin
      i:=lua_gettop(luavm);
      if i>oldstack then
      begin

        //is currently shown inside the pcall function
        pc:=lua_tolstring(luavm, -1,nil);
        if pc<>nil then
        begin
          mOutput.lines.AddText(rsError+':'+pc)  ;
          mOutput.VertScrollBar.Position:=mOutput.VertScrollBar.Range;
        end
        else
          moutput.lines.add(rsError+':'+'nil');
      end else moutput.lines.add(rsError);

    end;
  finally

    if dodebug then
    begin
      LuaDebugForm.btnExecute.enabled:=true;
      lua_sethook(luavm, linehook, 0, 0);
      LuaDebugForm:=nil;

      mscript.OnMouseEnter:=nil;
      mscript.OnMouseLeave:=nil;

      if hintwindow<>nil then
        hintwindow.hide;


    end;

    lua_settop(luavm, oldstack);

    lua_setPrintOutput(oldprintoutput);
  end;

  mScript.SetFocus;
end;



procedure TfrmLuaEngine.cbShowOnPrintClick(Sender: TObject);
begin

end;

procedure TfrmLuaEngine.dlgReplaceFind(Sender: TObject);
var so: TSynSearchOptions;
begin
  so:=[];
  if not (frDown in dlgReplace.Options) then
    so:=so+[ssoBackwards];

  if (frEntireScope in dlgReplace.Options) then
    so:=so+[ssoEntireScope];

  if (frMatchCase in dlgReplace.Options) then
    so:=so+[ssoMatchCase];

  if (frPromptOnReplace in dlgReplace.Options) then
    so:=so+[ssoPrompt];

  if (frFindNext in dlgReplace.Options) then
    so:=so+[ssoFindContinue];

  if (frWholeWord in dlgReplace.Options) then
    so:=so+[ssoWholeWord];

  {if mscript.SelAvail then     todo: Try to get this to work in all cases
    so:=so+[ssoSelectedOnly];  }

  mscript.SearchReplace(TFindDialog(sender).FindText,'',so);
end;

procedure TfrmLuaEngine.dlgReplaceReplace(Sender: TObject);
var so: TSynSearchOptions;
begin
  so:=[];
  if not (frDown in dlgReplace.Options) then
    so:=so+[ssoBackwards];

  if (frEntireScope in dlgReplace.Options) then
    so:=so+[ssoEntireScope];

  if (frMatchCase in dlgReplace.Options) then
    so:=so+[ssoMatchCase];

  if (frPromptOnReplace in dlgReplace.Options) then
    so:=so+[ssoPrompt];

  if (frReplace in dlgReplace.Options) then
    so:=so+[ssoReplace];

  if (frReplaceAll in dlgReplace.Options) then
    so:=so+[ssoReplaceAll];

  if (frFindNext in dlgReplace.Options) then
    so:=so+[ssoFindContinue];

  if (frWholeWord in dlgReplace.Options) then
    so:=so+[ssoWholeWord];

  if mscript.SelAvail then
    so:=so+[ssoSelectedOnly];


  mscript.SearchReplace(dlgReplace.FindText,dlgReplace.ReplaceText,so);
end;

procedure TfrmLuaEngine.FormCreate(Sender: TObject);
var
  x: array of integer;
  fq: TFontQuality;
  i: integer;
  multicaret: TSynPluginMultiCaret;
begin

  synhighlighter:=TSynLuaSyn.Create(self);
  reloadHighlighterSettings;

  mscript.Highlighter:=synhighlighter;

  multicaret:=TSynPluginMultiCaret.Create(mscript);
  multicaret.EnableWithColumnSelection:=true;
  multicaret.DefaultMode:=mcmMoveAllCarets;
  multicaret.DefaultColumnSelectMode:=mcmCancelOnCaretMove;

  //set the default colors
  mscript.Color:=colorset.TextBackground;
  mscript.Font.color:=colorset.FontColor;
  mscript.Gutter.Color:=clBtnFace;
  mscript.Gutter.LineNumberPart.MarkupInfo.Background:=clBtnFace;
  mscript.Gutter.SeparatorPart.MarkupInfo.Background:=clBtnFace;

  mscript.LineHighlightColor.Background:=ColorToRGB(mscript.Color) xor $212121;


  fq:=mscript.Font.Quality;
  if not (fq in [fqCleartypeNatural, fqDefault]) then
    mscript.Font.quality:=fqDefault;


  setlength(x,1);
  if LoadFormPosition(self, x) then
  begin
    loadedFormPosition:=true;
    panel1.height:=x[0];
    if length(x)>1 then
    begin
      miResizeOutput.checked:=x[1]=1;
      miResizeOutput.OnClick(miResizeOutput);

      if length(x)>2 then
        miShowScriptInOutput.checked:=x[2]=1;

      if length(x)>3 then
        miAutoComplete.checked:=x[3]=1;
    end;
  end;

  {$ifdef darwin}
  miCut.ShortCut:=TextToShortCut('Meta+X');
  miCopy.ShortCut:=TextToShortCut('Meta+C');
  miPaste.ShortCut:=TextToShortCut('Meta+V');
  miUndo.ShortCut:=TextToShortCut('Meta+Z');
  miRedo.ShortCut:=TextToShortCut('Shift+Meta+X');
  miFind.ShortCut:=TextToShortCut('Meta+F');

  i:=mScript.Keystrokes.FindCommand(ecSelectAll);
  if i<>-1 then mScript.Keystrokes[i].ShortCut:=TextToShortCut('Meta+A');

  i:=mScript.Keystrokes.FindCommand(ecLineStart);
  if i<>-1 then mScript.Keystrokes[i].ShortCut:=TextToShortCut('Meta+Left');

  i:=mScript.Keystrokes.FindCommand(ecLineEnd);
  if i<>-1 then mScript.Keystrokes[i].ShortCut:=TextToShortCut('Meta+Right');

  i:=mScript.Keystrokes.FindCommand(ecEditorTop);
  if i<>-1 then mScript.Keystrokes[i].ShortCut:=TextToShortCut('Meta+Up');

  i:=mScript.Keystrokes.FindCommand(ecEditorBottom);
  if i<>-1 then mScript.Keystrokes[i].ShortCut:=TextToShortCut('Meta+Down');


  MenuItem3.ShortCutKey2:=TextToShortCut('Meta+S');

  MenuItem11.ShortCut:=TextToShortCut('Meta+N');
  MenuItem2.ShortCut:=TextToShortCut('Meta+O');
  MenuItem3.ShortCut:=TextToShortCut('Meta+S');
  miSaveCurrentScriptAs.ShortCut:=TextToShortCut('Meta+Alt+S');



   {$endif}
end;

procedure TfrmLuaEngine.FormDestroy(Sender: TObject);
var x: array of integer;
begin
  setlength(x,4);
  x[0]:=panel1.height;
  x[1]:=integer(ifthen(miResizeOutput.checked, 1,0));
  x[2]:=integer(ifthen(miShowScriptInOutput.checked, 1,0));
  x[3]:=integer(ifthen(miAutoComplete.checked, 1,0));

  SaveFormPosition(self, x);
end;

procedure TfrmLuaEngine.FormShow(Sender: TObject);
var i, off: integer;
begin
  if overridefont<>nil then
    mScript.font.size:=overridefont.size
  else
    mScript.font.size:=10;

  i:=GetFontData(font.reference.handle).Height;
  if i<mScript.Font.Height then
    mScript.Font.Height:=i;

  if adjustedSize=false then
  begin
    dpihelper.AdjustToolbar(tbDebug);
    AdjustImageList(ilSyneditDebug);
    adjustedSize:=true;
  end;

  if loadedFormPosition=false then
  begin
    i:=mscript.CharWidth*40+mscript.Gutter.Width+panel3.width;
    if mscript.width<i then clientwidth:=clientwidth+(i-mscript.width);

    i:=mscript.LineHeight*6;
    off:=(i-mscript.height);
    if mscript.height<i then panel1.height:=panel1.height+off;

    clientheight:=clientheight+off;

    i:=canvas.TextHeight('XXX')*10;
    if moutput.height<i then
      clientheight:=clientheight+(i-moutput.height);
  end;

end;


procedure TfrmLuaEngine.miUndoClick(Sender: TObject);
begin
  mscript.Undo;
end;

procedure TfrmLuaEngine.MenuItem11Click(Sender: TObject);
var f: TfrmLuaEngine;
begin
  f:=TfrmLuaEngine.create(application);
  f.miView.visible:=false;

  f.show;
end;

procedure TfrmLuaEngine.miFindClick(Sender: TObject);
begin
  finddialog1.Execute;
end;

procedure TfrmLuaEngine.miRedoClick(Sender: TObject);
begin
  mscript.redo;
end;

procedure TfrmLuaEngine.reloadHighlighterSettings;
begin
  synhighlighter.LoadFromRegistry(HKEY_CURRENT_USER, '\Software\'+strCheatEngine+'\Lua Highlighter'+darkmodestring);
end;

procedure TfrmLuaEngine.MenuItem15Click(Sender: TObject);
var
  frmHighlighterEditor: TfrmHighlighterEditor;
begin
  frmHighlighterEditor:=TfrmHighlighterEditor.create(self);
  synhighlighter.LoadFromRegistry(HKEY_CURRENT_USER, '\Software\'+strCheatEngine+'\Lua Highlighter'+darkmodestring);
  frmHighlighterEditor.highlighter:=synhighlighter;
  if frmHighlighterEditor.showmodal=mrok then
  begin
    synhighlighter.SaveToRegistry(HKEY_CURRENT_USER, '\Software\'+strCheatEngine+'\Lua Highlighter'+darkmodestring);
    ReloadAllAutoInjectHighlighters; //AA uses lua too
    ReloadAllLuaEngineHighlighters;
  end;

  frmHighlighterEditor.free;
end;

procedure TfrmLuaEngine.MenuItem2Click(Sender: TObject);
begin
  if OpenDialog1.Execute then
    mscript.Lines.LoadFromFile(opendialog1.filename{$if FPC_FULLVERSION>=030200}, true{$endif});

end;

procedure TfrmLuaEngine.MenuItem3Click(Sender: TObject);
begin
  if savedialog1.FileName='' then
    miSaveCurrentScriptAs.Click
  else
    mscript.lines.SaveToFile(savedialog1.filename);
end;

procedure TfrmLuaEngine.MenuItem5Click(Sender: TObject);
begin
  moutput.Clear;
end;

procedure TfrmLuaEngine.miFindReplaceClick(Sender: TObject);
begin
  dlgReplace.Execute;
end;

procedure TfrmLuaEngine.miCutClick(Sender: TObject);
begin
  mscript.CutToClipboard;
end;

procedure TfrmLuaEngine.miCopyClick(Sender: TObject);
begin
  mscript.CopyToClipboard;
end;

procedure TfrmLuaEngine.miPasteClick(Sender: TObject);
begin
  mscript.PasteFromClipboard;
end;

procedure TfrmLuaEngine.miResizeOutputClick(Sender: TObject);
begin
  if groupbox1.align=alClient then
    groupbox1.align:=alNone;

  if panel1.align=alClient then
    panel1.align:=alNone;


  if not miResizeOutput.checked then
  begin
    groupbox1.align:=alTop;
    panel1.align:=alClient;
    splitter1.Align:=alTop;
//    splitter1.ResizeControl:=groupbox1;
  end
  else
  begin
    panel1.align:=alBottom;
    groupbox1.align:=alClient;
    //splitter1.ResizeControl:=panel1;
    splitter1.Align:=alBottom;
  end;
end;

procedure TfrmLuaEngine.miSaveCurrentScriptAsClick(Sender: TObject);
begin
  if savedialog1.Execute then
  begin
    mscript.lines.SaveToFile(savedialog1.filename);
    Caption:=rsLuaEngine+' '+ExtractFileNameOnly(savedialog1.filename);
  end;
end;

procedure TfrmLuaEngine.miSetBreakpointClick(Sender: TObject);
begin
  mScriptGutterClick(mScript, 0,0, mscript.CaretY, nil);
end;

procedure TfrmLuaEngine.miShowScriptInOutputClick(Sender: TObject);
begin

end;

procedure TfrmLuaEngine.mScriptChange(Sender: TObject);
begin

end;

procedure TfrmLuaEngine.mScriptGutterClick(Sender: TObject; X, Y,
  Line: integer; mark: TSynEditMark);
var
  ml: TSynEditMarkLine;
  i: integer;
  hasbp:boolean;
begin
  hasbp:=false;
  ml:=mscript.Marks.Line[line];

  if ml<>nil then
  begin
    for i:=0 to ml.Count-1 do
    begin
      if ml[i].ImageIndex in [0,2] then
        hasbp:=true;
    end;

    if hasbp then
    begin
      //clear it
      i:=0;
      while i<ml.count do
      begin
        if ml[i].imageindex in [0,2] then //bp set or bp set and current line
        begin
          ml[i].Free;
          ml:=mscript.Marks.Line[line];
          if ml=nil then exit;
        end
        else
          inc(i);
      end;
    end;
  end;

  if not hasbp then
  begin
    //set it
    mark:=TSynEditMark.Create(mscript);
    mark.line:=line;
    mark.ImageList:=ilSyneditDebug;
    mark.ImageIndex:=0;
    mark.Visible:=true;
    mscript.Marks.Add(mark);
  end;
end;

procedure TfrmLuaEngine.mScriptKeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  if (ssCtrl in shift) and (key=vk_return) then
  begin
    btnExecute.click;
    mScript.ClearAll;
  end;
    {
  if (key=VK_TAB) and (not mscript.ReadOnly) then
  begin
    if shift=[] then
    begin
      //right
      mscript.BlockTabIndent:=;
      mscript.SelStart



    end
    else
    if Shift=[ssShift] then
    begin
      //left

    end;
  end; }
end;

procedure TfrmLuaEngine.mScriptKeyPress(Sender: TObject; var Key: char);
var p,p2: tpoint;
begin
  if miAutocomplete.checked then
  begin
    if key='.' then
    begin
      {$ifdef windows} //perhaps fixed in laz 2.0.6 which I use for mac , or just a cocoa thing where the char is inserted first
      //mscript.InsertTextAtCaret('.');






      {$endif}
      p:=mscript.RowColumnToPixels(point(mscript.CaretX,mscript.CaretY+1));
      p2:=mscript.ClientToScreen(point(0,0));



      scLuaCompleter.Editor:=mscript;


      CompleterInvokedByDot:=true;

      try
        scLuaCompleter.Execute('.',p2+p);

        if (scLuaCompleter.TheForm<>nil) and scLuaCompleter.TheForm.CanFocus then
          scLuaCompleter.TheForm.SetFocus;

      except
      end;

    end;
  end;
end;

procedure TfrmLuaEngine.mScriptMouseEnter(Sender: TObject);
begin
  tShowHint.enabled:=false;
  tShowHint.AutoEnabled:=true;
end;

procedure TfrmLuaEngine.mScriptMouseLeave(Sender: TObject);
begin
  tShowHint.AutoEnabled:=false;
  tShowHint.enabled:=false;
end;

procedure TfrmLuaEngine.mScriptMouseLink(Sender: TObject; X, Y: Integer;
  var AllowMouseLink: Boolean);
begin
  AllowMouseLink:=false;
end;

procedure TfrmLuaEngine.mScriptMouseMove(Sender: TObject; Shift: TShiftState;
  X, Y: Integer);
begin
  if hintwindow<>nil then
    hintwindow.hide;
end;

procedure TfrmLuaEngine.mScriptShowHint(Sender: TObject; HintInfo: PHintInfo);
begin
  asm
  nop

  end;
end;


initialization
  {$I frmluaengineunit.lrs}

end.