synhighlighterm3.pas

一个mwEdit控件原码,比mwCuuEdit0.92a功能先进.

{-------------------------------------------------------------------------------
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: SynHighlighterM3.pas, released 2000-11-23.

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: SynHighlighterM3.pas,v 1.9 2004/02/26 17:58:28 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 Modula-3 syntax highlighter for SynEdit)
@author(Martin Pley <[e-mail]>)
@created(January 2000, converted to SynEdit November 23, 2000)
@lastmod(2000-11-23)
The SynHighlighterM3 unit provides SynEdit with a Modula-3 (.m3) highlighter.
}

{$IFNDEF QSYNHIGHLIGHTERM3}
unit SynHighlighterM3;
{$ENDIF}

{$I SynEdit.inc}

interface

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

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

  TTokenRange = (trNone, trComment, trPragma);

  TRangeState = packed record
    case boolean of
      FALSE: (p: pointer);
      TRUE: (TokenRange: word; Level: word);
    end;

  TProcTableProc = procedure of object;

  TSynM3Syn = class(TSynCustomHighLighter)
  private
    fLine: PChar;
    fLineNumber: integer;
    fProcTable: array[#0..#255] of TProcTableProc;
    Run: LongInt;
    fRange: TRangeState;
    fStringLen: integer;
    fToIdent: PChar;
    fTokenPos: integer;
    FTokenID: TtkTokenKind;
    fCommentAttri: TSynHighlighterAttributes;
    fIdentifierAttri: TSynHighlighterAttributes;
    fKeyAttri: TSynHighlighterAttributes;
    fNumberAttri: TSynHighlighterAttributes;
    fPragmaAttri: TSynHighlighterAttributes;
    fReservedAttri: TSynHighlighterAttributes;
    fSpaceAttri: TSynHighlighterAttributes;
    fStringAttri: TSynHighlighterAttributes;
    fSymbolAttri: TSynHighlighterAttributes;
    fSyntaxErrorAttri: TSynHighlighterAttributes;
    fKeywords: TSynHashEntryList;
    procedure DoAddKeyword(AKeyword: string; AKind: integer);
    function IdentKind(MayBe: PChar): TtkTokenKind;
    function KeyComp(AKey: string): boolean;
    function KeyHash(ToHash: PChar): integer;
    procedure MakeMethodTables;
    procedure SymAsciiCharProc;
    procedure SymCommentHelpProc;
    procedure SymCRProc;
    procedure SymIdentProc;
    procedure SymLFProc;
    procedure SymNestedHelperProc(AOpenChar, ACloseChar: char);
    procedure SymNullProc;
    procedure SymNumberProc;
    procedure SymPragmaProc;
    procedure SymPragmaHelpProc;
    procedure SymRoundOpenProc;
    procedure SymSpaceProc;
    procedure SymStringProc;
    procedure SymSymbolProc;
    procedure SymUnknownProc;
  protected
    function GetIdentChars: TSynIdentChars; override;
  public
    class function GetLanguageName: string; override;
{$IFDEF SYN_DEVELOPMENT_CHECKS}
  public
    property _Keywords: TSynHashEntryList read fKeywords;
{$ENDIF}
  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;
    procedure Next; override;
    procedure ResetRange; override;
    procedure SetLine(NewValue: String; LineNumber:Integer); override;
    procedure SetRange(Value: Pointer); override;
  published
    property CommentAttri: TSynHighlighterAttributes read fCommentAttri
      write fCommentAttri;
    property IdentifierAttri: TSynHighlighterAttributes read fIdentifierAttri
      write fIdentifierAttri;
    property KeyAttri: TSynHighlighterAttributes read fKeyAttri write fKeyAttri;
    property NumberAttri: TSynHighlighterAttributes read fNumberAttri
      write fNumberAttri;
    property PragmaAttri: TSynHighlighterAttributes read fPragmaAttri
      write fPragmaAttri;
    property ReservedAttri: TSynHighlighterAttributes read fReservedAttri
      write fReservedAttri;
    property SpaceAttri: TSynHighlighterAttributes read fSpaceAttri
      write fSpaceAttri;
    property StringAttri: TSynHighlighterAttributes read fStringAttri
      write fStringAttri;
    property SymbolAttri: TSynHighlighterAttributes read fSymbolAttri
      write fSymbolAttri;
    property SyntaxErrorAttri: TSynHighlighterAttributes read fSyntaxErrorAttri
      write fSyntaxErrorAttri;
  end;

implementation

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

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

const
  Keywords: string =
    'AS,AND,ANY,ARRAY,BEGIN,BITS,BRANDED,BY,CASE,CONST,DIV,DO,ELSE,ELSIF,END,' +
    'EVAL,EXCEPT,EXCEPTION,EXIT,EXPORTS,FINALLY,FOR,FROM,GENERIC,IF,IMPORT,' +
    'IN,INTERFACE,LOCK,LOOP,METHODS,MOD,MODULE,NOT,OBJECT,OF,OR,OVERRIDES,' +
    'PROCEDURE,RAISE,RAISES,READONLY,RECORD,REF,REPEAT,RETURN,REVEAL,ROOT,' +
    'SET,THEN,TO,TRY,TYPE,TYPECASE,UNSAFE,UNTIL,UNTRACED,VALUE,VAR,WHILE,WITH';

  ReservedWords: string =
    'ABS,ADDRESS,ADR,ADRSIZE,BITSIZE,BOOLEAN,BYTESIZE,CARDINAL,CEILING,CHAR,' +
    'DEC,DISPOSE,FALSE,FIRST,FLOAT,FLOOR,INC,INTEGER,ISTYPE,LAST,LONGFLOAT,' +
    'LONGREAL,LOOPHOLE,MAX,MIN,MUTEX,NARROW,NEW,NIL,NULL,NUMBER,ORD,REAL,' +
    'REFANY,ROUND,SUBARRAY,TEXT,TRUE,TRUNC,TYPECODE,VAL';

procedure MakeIdentTable;
var
  I: Char;
begin
  FillChar(Identifiers, SizeOf(Identifiers), 0);
  for I := 'a' to 'z' do
    Identifiers[i] := TRUE;
  for I := 'A' to 'Z' do
    Identifiers[i] := TRUE;
  for I := '0' to '9' do
    Identifiers[i] := TRUE;
  Identifiers['_'] := TRUE;

  FillChar(mHashTable, SizeOf(mHashTable), 0);
  for I := 'a' to 'z' do
    mHashTable[I] := 1 + Ord(I) - Ord('a');
  for I := 'A' to 'Z' do
    mHashTable[I] := 1 + Ord(I) - Ord('A');
  mHashTable['_'] := 27;
  for I := '0' to '9' do
    mHashTable[I] := 28 + Ord(I) - Ord('0');
end;

procedure TSynM3Syn.DoAddKeyword(AKeyword: string; AKind: integer);
var
  HashValue: integer;
begin
  HashValue := KeyHash(PChar(AKeyword));
  fKeywords[HashValue] := TSynHashEntry.Create(AKeyword, AKind);
end;

function TSynM3Syn.IdentKind(MayBe: PChar): TtkTokenKind;
var
  Entry: TSynHashEntry;
begin
  fToIdent := MayBe;
  Entry := fKeywords[KeyHash(MayBe)];
  while Assigned(Entry) do begin
    if Entry.KeywordLen > fStringLen then
      break
    else if Entry.KeywordLen = fStringLen then
      if KeyComp(Entry.Keyword) then begin
        Result := TtkTokenKind(Entry.Kind);
        exit;
      end;
    Entry := Entry.Next;
  end;
  Result := tkIdentifier;
end;

function TSynM3Syn.KeyComp(AKey: string): boolean;
var
  i: integer;
  pKey1, pKey2: PChar;
begin
  pKey1 := fToIdent;
  // Note: fStringLen is always > 0 !
  pKey2 := pointer(aKey);
  for i := 1 to fStringLen do
  begin
    if pKey1^ <> pKey2^ then begin                                              //mp 2000-12-17
      Result := FALSE;
      exit;
    end;
    Inc(pKey1);
    Inc(pKey2);
  end;
  Result := TRUE;
end;

function TSynM3Syn.KeyHash(ToHash: PChar): integer;
begin
  Result := 0;
  while Identifiers[ToHash^] do begin
{$IFOPT Q-}
    Result := 7 * Result + mHashTable[ToHash^];
{$ELSE}
    Result := (7 * Result + mHashTable[ToHash^]) and $FFFFFF;
{$ENDIF}
    Inc(ToHash);
  end;
  Result := Result and $FF; // 255
  fStringLen := ToHash - fToIdent;
end;

procedure TSynM3Syn.MakeMethodTables;
var
  I: char;
begin
  for I := #0 to #255 do
    case I of
      #39: fProcTable[I] := SymAsciiCharProc;
      #13: fProcTable[I] := SymCRProc;
      'A'..'Z', 'a'..'z', '_':
        fProcTable[I] := SymIdentProc;
      #10: fProcTable[I] := SymLFProc;
       #0: fProcTable[I] := SymNullProc;
      '0'..'9':
        fProcTable[I] := SymNumberProc;
      '(': fProcTable[I] := SymRoundOpenProc;
      #1..#9, #11, #12, #14..#32:
        fProcTable[I] := SymSpaceProc;
      '{','}','|','!', #35..#38, #42..#47, #58, #59, #61..#64, #91..#94, ')':
        fProcTable[I] := SymSymbolProc;
      '<' : fProcTable[I]:= SymPragmaProc;
      #34: fProcTable[I] := SymStringProc;
    else
      fProcTable[I] := SymUnknownProc;
    end;
end;

constructor TSynM3Syn.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  fKeywords := TSynHashEntryList.Create;
  fCommentAttri := TSynHighlighterAttributes.Create(SYNS_AttrComment);
  fCommentAttri.Style:= [fsItalic];
  AddAttribute(fCommentAttri);
  fIdentifierAttri := TSynHighlighterAttributes.Create(SYNS_AttrIdentifier);
  AddAttribute(fIdentifierAttri);
  fKeyAttri := TSynHighlighterAttributes.Create(SYNS_AttrKey);
  fKeyAttri.Style:= [fsBold];
  AddAttribute(fKeyAttri);
  fNumberAttri := TSynHighlighterAttributes.Create(SYNS_AttrNumber);
  AddAttribute(fNumberAttri);
  fPragmaAttri := TSynHighlighterAttributes.Create(SYNS_AttrPreprocessor);
  fPragmaAttri.Style:= [fsBold];
  AddAttribute(fPragmaAttri);
  fReservedAttri := TSynHighlighterAttributes.Create(SYNS_AttrReservedWord);
  AddAttribute(fReservedAttri);
  fSpaceAttri := TSynHighlighterAttributes.Create(SYNS_AttrSpace);
  AddAttribute(fSpaceAttri);
  fStringAttri := TSynHighlighterAttributes.Create(SYNS_AttrString);
  AddAttribute(fStringAttri);
  fSymbolAttri := TSynHighlighterAttributes.Create(SYNS_AttrSymbol);
  AddAttribute(fSymbolAttri);
  fSyntaxErrorAttri := TSynHighlighterAttributes.Create(SYNS_AttrSyntaxError);
  fSyntaxErrorAttri.Foreground := clRed;
  AddAttribute(fSyntaxErrorAttri);
  SetAttributesOnChange(DefHighlightChange);

  MakeMethodTables;
  EnumerateKeywords(Ord(tkKey), Keywords, IdentChars, DoAddKeyword);
  EnumerateKeywords(Ord(tkReserved), ReservedWords, IdentChars, DoAddKeyword);
  fDefaultFilter := SYNS_FilterModula3;
end;

destructor TSynM3Syn.Destroy;
begin
  fKeywords.Free;
  inherited Destroy;
end;

procedure TSynM3Syn.SymAsciiCharProc;
begin
  fTokenID := tkString;
  Inc(Run);
  while not (fLine[Run] in [#0, #10, #13]) do begin