synhighlightergeneral.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: SynHighlighterGeneral.pas, released 2000-04-07.
The Original Code is based on the mwGeneralSyn.pas file from the
mwEdit component suite by Martin Waldenburg and other developers, the Initial
Author of this file is Martin Waldenburg.
Portions written by Martin Waldenburg are copyright 1999 Martin Waldenburg.
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: SynHighlighterGeneral.pas,v 1.16 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

Known Issues:
-------------------------------------------------------------------------------}
{
@abstract(Provides a customizable highlighter for SynEdit)
@author(Martin Waldenburg, converted to SynEdit by Michael Hieke)
@created(1999)
@lastmod(2000-06-23)
The SynHighlighterGeneral unit provides a customizable highlighter for SynEdit.
}

{$IFNDEF QSYNHIGHLIGHTERGENERAL}
unit SynHighlighterGeneral;
{$ENDIF}

{$I SynEdit.inc}

interface

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

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

  TCommentStyle = (csAnsiStyle, csPasStyle, csCStyle, csAsmStyle, csBasStyle,
    csCPPStyle);
  TCommentStyles = set of TCommentStyle;

  TRangeState = (rsANil, rsAnsi, rsPasStyle, rsCStyle, rsUnKnown);

  TStringDelim = (sdSingleQuote, sdDoubleQuote);

  TProcTableProc = procedure of object;

type
  TSynGeneralSyn = class(TSynCustomHighlighter)
  private
    fRange: TRangeState;
    fLine: PChar;
    fProcTable: array[#0..#255] of TProcTableProc;
    Run: LongInt;
    fTokenPos: Integer;
    fTokenID: TtkTokenKind;
    fLineNumber : Integer;
    fCommentAttri: TSynHighlighterAttributes;
    fIdentifierAttri: TSynHighlighterAttributes;
    fKeyAttri: TSynHighlighterAttributes;
    fNumberAttri: TSynHighlighterAttributes;
    fPreprocessorAttri: TSynHighlighterAttributes;                         
    fSpaceAttri: TSynHighlighterAttributes;
    fStringAttri: TSynHighlighterAttributes;
    fSymbolAttri: TSynHighlighterAttributes;
    fKeyWords: TStrings;
    fComments: TCommentStyles;
    fStringDelimCh: char;
    fIdentChars: TSynIdentChars;
    fDetectPreprocessor: boolean;
    procedure AsciiCharProc;
    procedure BraceOpenProc;
    procedure PointCommaProc;
    procedure CRProc;
    procedure IdentProc;
    procedure IntegerProc;
    procedure LFProc;
    procedure NullProc;
    procedure NumberProc;
    procedure RoundOpenProc;
    procedure SlashProc;
    procedure SpaceProc;
    procedure StringProc;
    procedure UnknownProc;
    procedure MakeMethodTables;
    procedure AnsiProc;
    procedure PasStyleProc;
    procedure CStyleProc;
    procedure SetKeyWords(const Value: TStrings);
    procedure SetComments(Value: TCommentStyles);
    function GetStringDelim: TStringDelim;
    procedure SetStringDelim(const Value: TStringDelim);
    function GetIdentifierChars: string;
    procedure SetIdentifierChars(const Value: string);
    procedure SetDetectPreprocessor(Value: boolean);
  protected
    function GetIdentChars: TSynIdentChars; override;
  public
    class function GetLanguageName: string; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    function GetDefaultAttribute(Index: integer): TSynHighlighterAttributes;
      override;
    function GetEol: Boolean; override;
    function GetRange: Pointer; override;
    function GetTokenID: TtkTokenKind;
    function GetToken: String; override;
    function GetTokenAttribute: TSynHighlighterAttributes; override;
    function GetTokenKind: integer; override;
    function GetTokenPos: Integer; override;
    function IsKeyword(const AKeyword: string): boolean; override;
    procedure Next; override;
    procedure ResetRange; override;
    procedure SetRange(Value: Pointer); override;
    procedure SetLine(NewValue: String; LineNumber: Integer); override;
    {$IFNDEF SYN_CLX}
    function SaveToRegistry(RootKey: HKEY; Key: string): boolean; override;
    function LoadFromRegistry(RootKey: HKEY; Key: string): boolean; override;
    {$ENDIF}
  published
    property CommentAttri: TSynHighlighterAttributes read fCommentAttri
      write fCommentAttri;
    property Comments: TCommentStyles read fComments write SetComments;
    property DetectPreprocessor: boolean read fDetectPreprocessor
      write SetDetectPreprocessor;
    property IdentifierAttri: TSynHighlighterAttributes read fIdentifierAttri
      write fIdentifierAttri;
    property IdentifierChars: string read GetIdentifierChars
      write SetIdentifierChars;
    property KeyAttri: TSynHighlighterAttributes read fKeyAttri write fKeyAttri;
    property KeyWords: TStrings read fKeyWords write SetKeyWords;
    property NumberAttri: TSynHighlighterAttributes read fNumberAttri
      write fNumberAttri;
    property PreprocessorAttri: TSynHighlighterAttributes
      read fPreprocessorAttri write fPreprocessorAttri;
    property SpaceAttri: TSynHighlighterAttributes read fSpaceAttri
      write fSpaceAttri;
    property StringAttri: TSynHighlighterAttributes read fStringAttri
      write fStringAttri;
    property SymbolAttri: TSynHighlighterAttributes read fSymbolAttri
      write fSymbolAttri;
    property StringDelim: TStringDelim read GetStringDelim write SetStringDelim
      default sdSingleQuote;
  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, J: 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;
    J := UpCase(I);
    Case I in ['_', 'a'..'z', 'A'..'Z'] of
      True: mHashTable[I] := Ord(J) - 64
    else mHashTable[I] := 0;
    end;
  end;
end;

function TSynGeneralSyn.IsKeyword(const AKeyword: string): boolean;
var
  First, Last, I, Compare: Integer;
  Token: String;
begin
  First := 0;
  Last := fKeywords.Count - 1;
  Result := False;
  Token := UpperCase(AKeyword);
  while First <= Last do
  begin
    I := (First + Last) shr 1;
    Compare := AnsiCompareText(fKeywords[i], Token);
    if Compare = 0 then
    begin
      Result := True;
      break;
    end else
      if Compare < 0 then First := I + 1 else Last := I - 1;
  end;
end; { IsKeyWord }

procedure TSynGeneralSyn.MakeMethodTables;
var
  I: Char;
begin
  for I := #0 to #255 do
    case I of
      '#': fProcTable[I] := AsciiCharProc;
      '{': fProcTable[I] := BraceOpenProc;
      ';': fProcTable[I] := PointCommaProc;                                      
      #13: fProcTable[I] := CRProc;
      'A'..'Z', 'a'..'z', '_': fProcTable[I] := IdentProc;
      '$': fProcTable[I] := IntegerProc;
      #10: fProcTable[I] := LFProc;
      #0: fProcTable[I] := NullProc;
      '0'..'9': fProcTable[I] := NumberProc;
      '(': fProcTable[I] := RoundOpenProc;
      '/': fProcTable[I] := SlashProc;
      #1..#9, #11, #12, #14..#32: fProcTable[I] := SpaceProc;
      else fProcTable[I] := UnknownProc;
    end;
  fProcTable[fStringDelimCh] := StringProc;
end;

constructor TSynGeneralSyn.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  fKeyWords := TStringList.Create;
  TStringList(fKeyWords).Sorted := True;
  TStringList(fKeyWords).Duplicates := dupIgnore;
  fCommentAttri := TSynHighlighterAttributes.Create(SYNS_AttrComment);
  fCommentAttri.Style := [fsItalic];
  AddAttribute(fCommentAttri);
  fIdentifierAttri := TSynHighlighterAttributes.Create(SYNS_AttrIdentifier);
  AddAttribute(fIdentifierAttri);
  fKeyAttri := TSynHighlighterAttributes.Create(SYNS_AttrReservedWord);
  fKeyAttri.Style := [fsBold];
  AddAttribute(fKeyAttri);
  fNumberAttri := TSynHighlighterAttributes.Create(SYNS_AttrNumber);
  AddAttribute(fNumberAttri);
  fSpaceAttri := TSynHighlighterAttributes.Create(SYNS_AttrSpace);
  AddAttribute(fSpaceAttri);
  fStringAttri := TSynHighlighterAttributes.Create(SYNS_AttrString);
  AddAttribute(fStringAttri);
  fSymbolAttri := TSynHighlighterAttributes.Create(SYNS_AttrSymbol);
  AddAttribute(fSymbolAttri);
  fPreprocessorAttri := TSynHighlighterAttributes.Create(SYNS_AttrPreprocessor);
  AddAttribute(fPreprocessorAttri);
  SetAttributesOnChange(DefHighlightChange);

  fStringDelimCh := '''';
  fIdentChars := inherited GetIdentChars;
  MakeMethodTables;
  fRange := rsUnknown;
end; { Create }

destructor TSynGeneralSyn.Destroy;
begin
  fKeyWords.Free;
  inherited Destroy;
end; { Destroy }

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

procedure TSynGeneralSyn.AnsiProc;
begin
  case fLine[Run] of
     #0: NullProc;
    #10: LFProc;
    #13: CRProc;
  else
    fTokenID := tkComment;
    repeat
      if (fLine[Run] = '*') and (fLine[Run + 1] = ')') then begin
        fRange := rsUnKnown;
        Inc(Run, 2);
        break;
      end;
      Inc(Run);
    until fLine[Run] in [#0, #10, #13];
  end;
end;

procedure TSynGeneralSyn.PasStyleProc;
begin
  case fLine[Run] of
     #0: NullProc;
    #10: LFProc;
    #13: CRProc;
  else
    fTokenID := tkComment;
    repeat
      if fLine[Run] = '}' then begin
        fRange := rsUnKnown;
        Inc(Run);
        break;
      end;
      Inc(Run);
    until fLine[Run] in [#0, #10, #13];
  end;
end;

procedure TSynGeneralSyn.CStyleProc;
begin
  case fLine[Run] of
     #0: NullProc;
    #10: LFProc;
    #13: CRProc;
  else
    fTokenID := tkComment;
    repeat
      if (fLine[Run] = '*') and (fLine[Run + 1] = '/') then begin
        fRange := rsUnKnown;
        Inc(Run, 2);
        break;
      end;
      Inc(Run);
    until fLine[Run] in [#0, #10, #13];
  end;
end;

procedure TSynGeneralSyn.AsciiCharProc;
begin
  if fDetectPreprocessor then begin
    fTokenID := tkPreprocessor;
    repeat
      inc(Run);
    until fLine[Run] in [#0, #10, #13];
  end else begin
    fTokenID := tkString;
    repeat
      inc(Run);
    until not (fLine[Run] in ['0'..'9']);
  end;
end;

procedure TSynGeneralSyn.BraceOpenProc;
begin
  if csPasStyle in fComments then
  begin
    fTokenID := tkComment;
    fRange := rsPasStyle;
    inc(Run);
    while FLine[Run] <> #0 do
      case FLine[Run] of
        '}':
          begin
            fRange := rsUnKnown;
            inc(Run);
            break;
          end;
        #10: break;

        #13: break;
      else inc(Run);
      end;
  end else
  begin
    inc(Run);
    fTokenID := tkSymbol;
  end;
end;