lazarus/components/synedit/synhighlighterini.pas

{-------------------------------------------------------------------------------
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: SynHighlighterIni.pas, released 2000-04-21.
The Original Code is based on the izIniSyn.pas file from the
mwEdit component suite by Martin Waldenburg and other developers, the Initial
Author of this file is Igor P. Zenkov.
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: SynHighlighterIni.pas,v 1.7 2001/11/09 07:46:17 plpolak 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 an Ini-files highlighter for SynEdit)
@author(Igor P. Zenkov, converted to SynEdit by Bruno Mikkelsen <btm@scientist.com>)
@created(1999-11-02, converted to SynEdit 2000-04-21)
@lastmod(2000-04-21)
The SynHighlighterIni unit provides SynEdit with an Ini-files highlighter.
Thanks to Primoz Gabrijelcic, Martin Waldenburg and Michael Hieke.
}
unit SynHighlighterIni;

{$I SynEdit.inc}

interface

uses
  Classes,
  Graphics,
  SynEditTypes, SynEditHighlighter, SynEditStrConst;

type
  TtkTokenKind = (tkComment, tkText, tkSection, tkKey, tkNull, tkNumber,
    tkSpace, tkString, tkSymbol, tkUnknown);

  TProcTableProc = procedure of object;

type
  TSynIniCommentType = (ictSemicolon, ictHash); // TODO ictSemicolonMidLine, ictHashMidline
  TSynIniCommentTypes = set of TSynIniCommentType;

  { TSynIniSyn }

  TSynIniSyn = class(TSynCustomHighlighter)
  private
    FCommentTypes: TSynIniCommentTypes;
    fLine: PChar;
    fLineNumber: Integer;
    fProcTable: array[#0..#255] of TProcTableProc;
    Run: LongInt;
    fTokenPos: Integer;
    FTokenID: TtkTokenKind;
    fCommentAttri: TSynHighlighterAttributes;
    fTextAttri: TSynHighlighterAttributes;
    fSectionAttri: TSynHighlighterAttributes;
    fKeyAttri: TSynHighlighterAttributes;
    fNumberAttri: TSynHighlighterAttributes;
    fSpaceAttri: TSynHighlighterAttributes;
    fStringAttri: TSynHighlighterAttributes;
    fSymbolAttri: TSynHighlighterAttributes;
    procedure SetCommentTypes(AValue: TSynIniCommentTypes);
    procedure SectionOpenProc;
    procedure KeyProc;
    procedure CRProc;
    procedure EqualProc;
    procedure TextProc;
    procedure LFProc;
    procedure NullProc;
    procedure NumberProc;
    procedure CommentProc;
    procedure SpaceProc;
    procedure StringProc;  // ""
    procedure StringProc1; // ''
    procedure MakeMethodTables;
  protected
    {General Stuff}
    function GetIdentChars: TSynIdentChars; override;
    function GetSampleSource: String; override;
  public
    class function GetLanguageName: string; override;
  public
    constructor Create(AOwner: TComponent); override;
    function GetDefaultAttribute(Index: integer): TSynHighlighterAttributes;   
      override;
    function GetEol: Boolean; override;
    function GetTokenID: TtkTokenKind;
    procedure SetLine(const NewValue: String; LineNumber:Integer); override;
    function GetToken: String; override;
    procedure GetTokenEx(out TokenStart: PChar; out TokenLength: integer); override;
    function GetTokenAttribute: TSynHighlighterAttributes; override;
    function GetTokenKind: integer; override;
    function GetTokenPos: Integer; override;
    procedure Next; override;
  published
    property CommentTypes: TSynIniCommentTypes read FCommentTypes write SetCommentTypes default [ictSemicolon];
    property CommentAttri: TSynHighlighterAttributes read fCommentAttri
      write fCommentAttri;
    property TextAttri   : TSynHighlighterAttributes read fTextAttri
      write fTextAttri;
    property SectionAttri: TSynHighlighterAttributes read fSectionAttri
      write fSectionAttri;
    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

procedure TSynIniSyn.MakeMethodTables;
var
  i: Char;
begin
  for i := #0 to #255 do
    case i of
      #0      : fProcTable[i] := @NullProc;
      #10 {LF}: fProcTable[i] := @LFProc;
      #13 {CR}: fProcTable[i] := @CRProc;
      #34 {"} : fProcTable[i] := @StringProc;
      #39 {'} : fProcTable[i] := @StringProc1;
      '0'..'9': fProcTable[i] := @NumberProc;
      #59 {;} : begin
          if ictSemicolon in FCommentTypes then
            fProcTable[i] := @CommentProc
          else
            fProcTable[i] := @TextProc;
        end;
      '#': begin
          if ictHash in FCommentTypes then
            fProcTable[i] := @CommentProc
          else
            fProcTable[i] := @TextProc;
        end;
      #61 {=} : fProcTable[i] := @EqualProc;
      #91 {[} : fProcTable[i] := @SectionOpenProc;
      #1..#9, #11, #12, #14..#32: fProcTable[i] := @SpaceProc;
    else
      fProcTable[i] := @TextProc;
    end;
end;

constructor TSynIniSyn.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  fCommentAttri            := TSynHighlighterAttributes.Create(@SYNS_AttrComment);
  fCommentAttri.Style      := [fsItalic];
  fCommentAttri.Foreground := clGreen;
  AddAttribute(fCommentAttri);
  fTextAttri               := TSynHighlighterAttributes.Create(@SYNS_AttrText);
  AddAttribute(fTextAttri);
  fSectionAttri            := TSynHighlighterAttributes.Create(@SYNS_AttrSection);
  fSectionAttri.Style      := [fsBold];
  AddAttribute(fSectionAttri);
  fKeyAttri                := TSynHighlighterAttributes.Create(@SYNS_AttrKey);
  fKeyAttri.Foreground     := clBlue;
  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);
  fSymbolAttri.Foreground := clRed;
  AddAttribute(fSymbolAttri);
  SetAttributesOnChange(@DefHighlightChange);

  fDefaultFilter      := SYNS_FilterINI;
  FCommentTypes := [ictSemicolon];
  MakeMethodTables;
end; { Create }

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

procedure TSynIniSyn.SectionOpenProc;
begin
  // if it is not column 0 mark as tkText and get out of here
  if Run > 0 then
  begin
    fTokenID := tkText;
    inc(Run);
    Exit;
  end;

  // this is column 0 ok it is a Section
  fTokenID := tkSection;
  inc(Run);
  while FLine[Run] <> #0 do
    case FLine[Run] of
      ']': begin inc(Run); break end;
      #10: break;
      #13: break;
    else inc(Run);
    end;
end;

procedure TSynIniSyn.CRProc;
begin
  fTokenID := tkSpace;
  Case FLine[Run + 1] of
    #10: inc(Run, 2);
  else inc(Run);
  end;
end;

procedure TSynIniSyn.EqualProc;
begin
  inc(Run);
  fTokenID := tkSymbol;
end;

procedure TSynIniSyn.SetCommentTypes(AValue: TSynIniCommentTypes);
begin
  if FCommentTypes = AValue then Exit;
  FCommentTypes := AValue;
  MakeMethodTables;
  FAttributeChangeNeedScan := True;
  DefHighlightChange(self);
end;

procedure TSynIniSyn.KeyProc;
begin
  fTokenID := tkKey;
  inc(Run);
  while FLine[Run] <> #0 do
    case FLine[Run] of
      '=': break;
      #10: break;
      #13: break;
    else inc(Run);
    end;
end;

procedure TSynIniSyn.TextProc;
begin
  if Run = 0 then
    KeyProc
  else begin
    inc(Run);
    while (fLine[Run] in [#128..#191]) OR // continued utf8 subcode
     ((fLine[Run]<>#0) and (fProcTable[fLine[Run]] = @TextProc)) do inc(Run);
    fTokenID := tkText;
    //fTokenID := tkText;
    //inc(Run);
  end;
end;

procedure TSynIniSyn.LFProc;
begin
  fTokenID := tkSpace;
  inc(Run);
end;

procedure TSynIniSyn.NullProc;
begin
  fTokenID := tkNull;
end;

procedure TSynIniSyn.NumberProc;
begin
  if Run = 0 then
    KeyProc
  else begin
    inc(Run);
    fTokenID := tkNumber;
    while FLine[Run] in ['0'..'9', '.', 'e', 'E'] do inc(Run);
    if FLine[Run] in ['a'..'z','A'..'Z'] then TextProc;
  end;
end;

// ;
procedure TSynIniSyn.CommentProc;
begin
  // if it is not column 0 mark as tkText and get out of here
  if Run > 0 then
  begin
    fTokenID := tkText;
    inc(Run);
    Exit;
  end;

  // this is column 0 ok it is a comment
  fTokenID := tkComment;
  inc(Run);
  while FLine[Run] <> #0 do
    case FLine[Run] of
      #10: break;
      #13: break;
    else inc(Run);
    end;
end;

procedure TSynIniSyn.SpaceProc;
begin
  inc(Run);
  fTokenID := tkSpace;
  while FLine[Run] in [#1..#9, #11, #12, #14..#32] do inc(Run);
end;

// ""
procedure TSynIniSyn.StringProc;
begin
  fTokenID := tkString;
  if (FLine[Run + 1] = #34) and (FLine[Run + 2] = #34) then inc(Run, 2);
  repeat
    case FLine[Run] of
      #0, #10, #13: break;
    end;
    inc(Run);
  until FLine[Run] = #34;
  if FLine[Run] <> #0 then inc(Run);
end;

// ''
procedure TSynIniSyn.StringProc1;
begin
  fTokenID := tkString;
  if (FLine[Run + 1] = #39) and (FLine[Run + 2] = #39) then inc(Run, 2);
  repeat
    case FLine[Run] of
      #0, #10, #13: break;
    end;
    inc(Run);
  until FLine[Run] = #39;
  if FLine[Run] <> #0 then inc(Run);
end;

procedure TSynIniSyn.Next;
begin
  fTokenPos := Run;
  fProcTable[fLine[Run]];
end;

function TSynIniSyn.GetDefaultAttribute(Index: integer): TSynHighlighterAttributes;
begin
  case Index of
    SYN_ATTR_COMMENT: Result := fCommentAttri;
    SYN_ATTR_KEYWORD: Result := fKeyAttri;
    SYN_ATTR_STRING: Result := fStringAttri;
    SYN_ATTR_WHITESPACE: Result := fSpaceAttri;
    SYN_ATTR_SYMBOL: Result := fSymbolAttri;
    SYN_ATTR_NUMBER: Result := fNumberAttri;
  else
    Result := nil;
  end;
end;

function TSynIniSyn.GetEol: Boolean;
begin
  Result := fTokenId = tkNull;
end;

function TSynIniSyn.GetToken: String;
var
  Len: LongInt;
begin
  Len := Run - fTokenPos;
  SetString(Result, (FLine + fTokenPos), Len);
end;

procedure TSynIniSyn.GetTokenEx(out TokenStart: PChar; out TokenLength: integer);
begin
  TokenLength := Run - fTokenPos;
  TokenStart := FLine + fTokenPos;
end;

function TSynIniSyn.GetTokenID: TtkTokenKind;
begin
  Result := fTokenId;
end;

function TSynIniSyn.GetTokenAttribute: TSynHighlighterAttributes;
begin
  case fTokenID of
    tkComment: Result := fCommentAttri;
    tkText   : Result := fTextAttri;
    tkSection: Result := fSectionAttri;
    tkKey    : Result := fKeyAttri;
    tkNumber : Result := fNumberAttri;
    tkSpace  : Result := fSpaceAttri;
    tkString : Result := fStringAttri;
    tkSymbol : Result := fSymbolAttri;
    tkUnknown: Result := fTextAttri;
    else Result := nil;
  end;
end;

function TSynIniSyn.GetTokenKind: integer;
begin
  Result := Ord(fTokenId);
end;

function TSynIniSyn.GetTokenPos: Integer;
begin
 Result := fTokenPos;
end;

function TSynIniSyn.GetIdentChars: TSynIdentChars;
begin
  Result := TSynValidStringChars;
end;

class function TSynIniSyn.GetLanguageName: string;
begin
  Result := SYNS_LangINI;
end;

function TSynIniSyn.GetSampleSource: String;
begin
  Result := '; Syntax highlighting'#13#10+
            '[Section]'#13#10+
            'Key=value'#13#10+
            'String="Arial"'#13#10+
            'Number=123456';
end;

initialization
  RegisterPlaceableHighlighter(TSynIniSyn);

end.