synhighlightergws.pas

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{-------------------------------------------------------------------------------
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/

Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
the specific language governing rights and limitations under the License.

The Original Code is: SynHighlighterCpp.pas, released 2000-04-10.
The Original Code is based on the dcjCppSyn.pas file from the
mwEdit component suite by Martin Waldenburg and other developers, the Initial
Author of this file is Michael Trier.
All Rights Reserved.

Contributors to the SynEdit and mwEdit projects are listed in the
Contributors.txt file.

Alternatively, the contents of this file may be used under the terms of the
GNU General Public License Version 2 or later (the "GPL"), in which case
the provisions of the GPL are applicable instead of those above.
If you wish to allow use of your version of this file only under the terms
of the GPL and not to allow others to use your version of this file
under the MPL, indicate your decision by deleting the provisions above and
replace them with the notice and other provisions required by the GPL.
If you do not delete the provisions above, a recipient may use your version
of this file under either the MPL or the GPL.

$Id: SynHighlighterGWS.pas,v 1.14 2005/01/28 16:53:22 maelh Exp $

You may retrieve the latest version of this file at the SynEdit home page,
located at http://SynEdit.SourceForge.net

-------------------------------------------------------------------------------}

{$IFNDEF QSYNHIGHLIGHTERGWS}
unit SynHighlighterGWS;
{$ENDIF}

{ This unit provides a syntax highlighter for GW-TEL Scripts }

{$I SynEdit.inc}

interface

uses
{$IFDEF SYN_CLX}
  QGraphics,
  QSynEditTypes,
  QSynEditHighlighter,
{$ELSE}
  Graphics,
  SynEditTypes,
  SynEditHighlighter,
{$ENDIF}
  SysUtils,
  Classes;

Type
  TtkTokenKind = (
    tkComment,
    tkIdentifier,
    tkKey,
    tkNull,
    tkNumber,
    tkSpace,
    tkString,
    tkSymbol,
    tkUnknown);

  TxtkTokenKind = (
    xtkAdd, xtkAddAssign, xtkAnd, xtkAndAssign, xtkArrow, xtkAssign,
    xtkBitComplement, xtkBraceClose, xtkBraceOpen, xtkColon, xtkComma,
    xtkDecrement, xtkDivide, xtkDivideAssign, xtkEllipse, xtkGreaterThan,
    xtkGreaterThanEqual, xtkIncOr, xtkIncOrAssign, xtkIncrement, xtkLessThan,
    xtkLessThanEqual, xtkLogAnd, xtkLogComplement, xtkLogEqual, xtkLogOr,
    xtkMod, xtkModAssign, xtkMultiplyAssign, xtkNotEqual, xtkPoint, xtkQuestion,
    xtkRoundClose, xtkRoundOpen, xtkScopeResolution, xtkSemiColon, xtkShiftLeft,
    xtkShiftLeftAssign, xtkShiftRight, xtkShiftRightAssign, xtkSquareClose,
    xtkSquareOpen, xtkStar, xtkSubtract, xtkSubtractAssign, xtkXor,
    xtkXorAssign);

  TRangeState = (rsAnsiC, rsUnKnown);

  TProcTableProc = procedure of Object;

  PIdentFuncTableFunc = ^TIdentFuncTableFunc;
  TIdentFuncTableFunc = function: TtkTokenKind of Object;

  TSynGWScriptSyn = class(TSynCustomHighlighter)
    private
      fRange: TRangeState;
      fLine: PChar;
      fProcTable: array[#0..#255] of TProcTableProc;
      Run: LongInt;
      fStringLen: Integer;
      fToIdent: PChar;
      fTokenPos: Integer;
      FTokenID: TtkTokenKind;
      FExtTokenID: TxtkTokenKind;
      fLineNumber: Integer;
      fIdentFuncTable: array[0..206] of TIdentFuncTableFunc;
      fCommentAttri: TSynHighlighterAttributes;
      fIdentifierAttri: TSynHighlighterAttributes;
      fInvalidAttri: TSynHighlighterAttributes;
      fKeyAttri: TSynHighlighterAttributes;
      fNumberAttri: TSynHighlighterAttributes;
      fSpaceAttri: TSynHighlighterAttributes;
      fStringAttri: TSynHighlighterAttributes;
      fSymbolAttri: TSynHighlighterAttributes;

      function KeyHash(ToHash: PChar): Integer;
      function KeyComp(const aKey: String): Boolean;
      function Func17: TtkTokenKind;
      function Func21: TtkTokenKind;
      function Func34: TtkTokenKind;
      function Func42: TtkTokenKind;
      function Func45: TtkTokenKind;
      function Func46: TtkTokenKind;
      function Func48: TtkTokenKind;
      function Func62: TtkTokenKind;
      function Func68: TtkTokenKind;
      function Func93: TtkTokenKind;
      function Func102: TtkTokenKind;

      procedure AnsiCProc;
      procedure AndSymbolProc;
      procedure AsciiCharProc;
      procedure AtSymbolProc;
      procedure BraceCloseProc;
      procedure BraceOpenProc;
      procedure CRProc;
      procedure ColonProc;
      procedure CommaProc;
      procedure EqualProc;
      procedure GreaterProc;
      procedure IdentProc;
      procedure LFProc;
      procedure LowerProc;
      procedure MinusProc;
      procedure ModSymbolProc;
      procedure NotSymbolProc;
      procedure NullProc;
      procedure NumberProc;
      procedure OrSymbolProc;
      procedure PlusProc;
      procedure PointProc;
      procedure QuestionProc;
      procedure RoundCloseProc;
      procedure RoundOpenProc;
      procedure SemiColonProc;
      procedure SlashProc;
      procedure SpaceProc;
      procedure SquareCloseProc;
      procedure SquareOpenProc;
      procedure StarProc;
      procedure StringProc;
      procedure TildeProc;
      procedure XOrSymbolProc;
      procedure UnknownProc;
      function AltFunc: TtkTokenKind;
      procedure InitIdent;
      function IdentKind(MayBe: PChar): TtkTokenKind;
      procedure MakeMethodTables;

    protected
      function GetIdentChars: TSynIdentChars; override;
      function GetExtTokenID: TxtkTokenKind;
      function IsFilterStored: Boolean; override;

    public
      constructor Create(AOwner: TComponent); override;

      class function GetLanguageName: string; override;
      function GetDefaultAttribute (Index: integer): TSynHighlighterAttributes; override;

      function GetEol: Boolean; override;
      function GetRange: Pointer; override;
      function GetTokenID: TtkTokenKind;
      procedure SetLine(NewValue: String; LineNumber:Integer); override;
      function GetToken: String; override;
      function GetTokenAttribute: TSynHighlighterAttributes; override;
      function GetTokenKind: integer; override;
      function GetTokenPos: Integer; override;
      procedure Next; override;
      procedure SetRange(Value: Pointer); override;
      procedure ResetRange; override;

      property ExtTokenID: TxtkTokenKind read GetExtTokenID;

    published
      property CommentAttri: TSynHighlighterAttributes read fCommentAttri write fCommentAttri;
      property IdentifierAttri: TSynHighlighterAttributes read fIdentifierAttri write fIdentifierAttri;
      property InvalidAttri: TSynHighlighterAttributes read fInvalidAttri write fInvalidAttri;
      property KeyAttri: TSynHighlighterAttributes read fKeyAttri write fKeyAttri;
      property NumberAttri: TSynHighlighterAttributes read fNumberAttri write fNumberAttri;
      property SpaceAttri: TSynHighlighterAttributes read fSpaceAttri write fSpaceAttri;
      property StringAttri: TSynHighlighterAttributes read fStringAttri write fStringAttri;
      property SymbolAttri: TSynHighlighterAttributes read fSymbolAttri write fSymbolAttri;
  end;

implementation

uses
{$IFDEF SYN_CLX}
  QSynEditStrConst;
{$ELSE}
  SynEditStrConst;
{$ENDIF}

var
  Identifiers: array[#0..#255] of ByteBool;
  mHashTable: array[#0..#255] of Integer;

procedure MakeIdentTable;
var
  I: Char;
begin
  for I := #0 to #255 do
  begin
    Case I of
      '_', '0'..'9', 'a'..'z', 'A'..'Z': Identifiers[I] := True;
    else Identifiers[I] := False;
    end;
    Case I in['_', 'a'..'z', 'A'..'Z'] of
      True:
        begin
          if (I > #64) and (I < #91) then mHashTable[I] := Ord(I) - 64 else
            if (I > #96) then mHashTable[I] := Ord(I) - 95;
        end;
    else mHashTable[I] := 0;
    end;
  end;
end;

procedure TSynGWScriptSyn.InitIdent;
var
  I: Integer;
  pF: PIdentFuncTableFunc;
begin
  pF := PIdentFuncTableFunc(@fIdentFuncTable);
  for I := Low(fIdentFuncTable) to High(fIdentFuncTable) do begin
    pF^ := AltFunc;
    Inc(pF);
  end;
  fIdentFuncTable[17] := Func17;
  fIdentFuncTable[21] := Func21;
  fIdentFuncTable[34] := Func34;
  fIdentFuncTable[42] := Func42;
  fIdentFuncTable[45] := Func45;
  fIdentFuncTable[46] := Func46;
  fIdentFuncTable[48] := Func48;
  fIdentFuncTable[62] := Func62;
  fIdentFuncTable[68] := Func68;
  fIdentFuncTable[93] := Func93;
  fIdentFuncTable[102] := Func102;
end;

function TSynGWScriptSyn.KeyHash(ToHash: PChar): Integer;
begin
  Result := 0;
  while ToHash^ in ['_', '0'..'9', 'a'..'z', 'A'..'Z'] do
  begin
    inc(Result, mHashTable[ToHash^]);
    inc(ToHash);
  end;
  fStringLen := ToHash - fToIdent;
end; { KeyHash }

function TSynGWScriptSyn.KeyComp(const aKey: String): Boolean;
var
  I: Integer;
  Temp: PChar;
begin
  Temp := fToIdent;
  if Length(aKey) = fStringLen then
  begin
    Result := True;
    for i := 1 to fStringLen do
    begin
      if Temp^ <> aKey[i] then
      begin
        Result := False;
        break;
      end;
      inc(Temp);
    end;
  end else Result := False;
end; { KeyComp }

function TSynGWScriptSyn.Func17: TtkTokenKind;
begin
  if KeyComp('if') then Result := tkKey else Result := tkIdentifier;
end;

function TSynGWScriptSyn.Func21: TtkTokenKind;
begin
  if KeyComp('do') then Result := tkKey else Result := tkIdentifier;
end;

function TSynGWScriptSyn.Func34: TtkTokenKind;
begin
  if KeyComp('char') then Result := tkKey else Result := tkIdentifier;
end;

function TSynGWScriptSyn.Func42: TtkTokenKind;
begin
  if KeyComp('for') then Result := tkKey else
    if KeyComp('break') then Result := tkKey else Result := tkIdentifier;
end;

function TSynGWScriptSyn.Func45: TtkTokenKind;
begin
  if KeyComp('else') then Result := tkKey else Result := tkIdentifier;
end;

function TSynGWScriptSyn.Func46: TtkTokenKind;
begin
 if KeyComp('int') then Result := tkKey else Result := tkIdentifier;
end;

function TSynGWScriptSyn.Func48: TtkTokenKind;
begin
  if KeyComp('false') then Result := tkKey else
    if KeyComp('bool') then Result := tkKey else Result := tkIdentifier;
end;

function TSynGWScriptSyn.Func62: TtkTokenKind;
begin
  if KeyComp('while') then Result := tkKey else Result := tkIdentifier;
end;

function TSynGWScriptSyn.Func68: TtkTokenKind;
begin
  if KeyComp('true') then Result := tkKey else Result := tkIdentifier;
end;

function TSynGWScriptSyn.Func93: TtkTokenKind;
begin
  if KeyComp('string') then Result := tkKey else Result := tkIdentifier;
end;

function TSynGWScriptSyn.Func102: TtkTokenKind;
begin
  if KeyComp('return') then Result := tkKey else Result := tkIdentifier;
end;

function TSynGWScriptSyn.AltFunc: TtkTokenKind;
begin
  Result := tkIdentifier;
end;

function TSynGWScriptSyn.IdentKind(MayBe: PChar): TtkTokenKind;
var
  HashKey: Integer;
begin
  fToIdent := MayBe;
  HashKey := KeyHash(MayBe);
  if HashKey < 207 then Result := fIdentFuncTable[HashKey] else Result := tkIdentifier;
end;

procedure TSynGWScriptSyn.MakeMethodTables;
var
  I: Char;
begin
  for I := #0 to #255 do
    case I of
      '&': fProcTable[I] := AndSymbolProc;
      #39: fProcTable[I] := AsciiCharProc;
      '@': fProcTable[I] := AtSymbolProc;
      '}': fProcTable[I] := BraceCloseProc;
      '{': fProcTable[I] := BraceOpenProc;
      #13: fProcTable[I] := CRProc;
      ':': fProcTable[I] := ColonProc;
      ',': fProcTable[I] := CommaProc;
      '=': fProcTable[I] := EqualProc;
      '>': fProcTable[I] := GreaterProc;
      '?': fProcTable[I] := QuestionProc;
      'A'..'Z', 'a'..'z', '_': fProcTable[I] := IdentProc;
      #10: fProcTable[I] := LFProc;
      '<': fProcTable[I] := LowerProc;
      '-': fProcTable[I] := MinusProc;
      '%': fProcTable[I] := ModSymbolProc;
      '!': fProcTable[I] := NotSymbolProc;
      #0: fProcTable[I] := NullProc;
      '0'..'9': fProcTable[I] := NumberProc;
      '|': fProcTable[I] := OrSymbolProc;
      '+': fProcTable[I] := PlusProc;
      '.': fProcTable[I] := PointProc;
      ')': fProcTable[I] := RoundCloseProc;
      '(': fProcTable[I] := RoundOpenProc;
      ';': fProcTable[I] := SemiColonProc;
      '/': fProcTable[I] := SlashProc;
      #1..#9, #11, #12, #14..#32: fProcTable[I] := SpaceProc;
      ']': fProcTable[I] := SquareCloseProc;
      '[': fProcTable[I] := SquareOpenProc;
      '*': fProcTable[I] := StarProc;
      #34: fProcTable[I] := StringProc;
      '~': fProcTable[I] := TildeProc;
      '^': fProcTable[I] := XOrSymbolProc;
    else
      fProcTable[I] := UnknownProc;
    end;
end;

constructor TSynGWScriptSyn.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);

  fCommentAttri := TSynHighlighterAttributes.Create(SYNS_AttrComment);
  fCommentAttri.Style:= [fsItalic];
  fIdentifierAttri := TSynHighlighterAttributes.Create(SYNS_AttrIdentifier);
  fInvalidAttri := TSynHighlighterAttributes.Create(SYNS_AttrIllegalChar);
  fKeyAttri := TSynHighlighterAttributes.Create(SYNS_AttrReservedWord);
  fKeyAttri.Style:= [fsBold];
  fNumberAttri := TSynHighlighterAttributes.Create(SYNS_AttrNumber);
  fSpaceAttri := TSynHighlighterAttributes.Create(SYNS_AttrSpace);
  fSpaceAttri.Foreground := clWindow;
  fStringAttri := TSynHighlighterAttributes.Create(SYNS_AttrString);
  fSymbolAttri := TSynHighlighterAttributes.Create(SYNS_AttrSymbol);

  AddAttribute(fCommentAttri);
  AddAttribute(fIdentifierAttri);
  AddAttribute(fInvalidAttri);
  AddAttribute(fKeyAttri);
  AddAttribute(fNumberAttri);
  AddAttribute(fSpaceAttri);
  AddAttribute(fStringAttri);
  AddAttribute(fSymbolAttri);

  SetAttributesOnChange(DefHighlightChange);
  InitIdent;
  MakeMethodTables;
  fRange         := rsUnknown;
  fDefaultFilter := SYNS_FilterGWS;
end; { Create }

procedure TSynGWScriptSyn.SetLine(NewValue: String; LineNumber:Integer);
begin
  fLine := PChar(NewValue);
  Run := 0;
  fLineNumber := LineNumber;
  Next;
end; { SetLine }

procedure TSynGWScriptSyn.AnsiCProc;
begin
  fTokenID := tkComment;
  case FLine[Run] of
    #0:
      begin
        NullProc;
        exit;
      end;
    #10:
      begin
        LFProc;
        exit;
      end;
    #13:
      begin
        CRProc;
        exit;
      end;
  end;

  while FLine[Run] <> #0 do
    case FLine[Run] of
      '*':
        if fLine[Run + 1] = '/' then begin
          inc(Run, 2);
          fRange := rsUnKnown;
          break;
        end else
          inc(Run);
      #10: break;
      #13: break;
    else inc(Run);
    end;
end;

procedure TSynGWScriptSyn.AndSymbolProc;
begin
  fTokenID := tkSymbol;
  case FLine[Run + 1] of
    '=':                               {and assign}
      begin
        inc(Run, 2);
        FExtTokenID := xtkAndAssign;
      end;
    '&':                               {logical and}
      begin
        inc(Run, 2);
        FExtTokenID := xtkLogAnd;
      end;
  else                                 {and}
    begin
      inc(Run);
      FExtTokenID := xtkAnd;
    end;
  end;
end;

procedure TSynGWScriptSyn.AsciiCharProc;
begin
  fTokenID := tkString;
  repeat
    if fLine[Run] = '\' then begin
      if fLine[Run + 1] in [#39, '\'] then
        inc(Run);
    end;
    inc(Run);
  until fLine[Run] in [#0, #10, #13, #39];
  if fLine[Run] = #39 then
    inc(Run);
end;

procedure TSynGWScriptSyn.AtSymbolProc;
begin
  fTokenID := tkUnknown;
  inc(Run);
end;

procedure TSynGWScriptSyn.BraceCloseProc;
begin
  inc(Run);
  fTokenId := tkSymbol;
  FExtTokenID := xtkBraceClose;
  fRange := rsUnknown;
end;

procedure TSynGWScriptSyn.BraceOpenProc;
begin
  inc(Run);
  fTokenId := tkSymbol;
  FExtTokenID := xtkBraceOpen;
end;