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https://gitlab.com/freepascal.org/lazarus/lazarus.git
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421 lines
11 KiB
ObjectPascal
421 lines
11 KiB
ObjectPascal
{-------------------------------------------------------------------------------
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The contents of this file are subject to the Mozilla Public License
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Version 1.1 (the "License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
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the specific language governing rights and limitations under the License.
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$Id$
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This is a basic synedit highlighter that does not parse text to create the
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attributes, but stores a list of ranges.
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-------------------------------------------------------------------------------}
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unit SynHighlighterPosition;
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{$I synedit.inc}
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interface
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uses
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Classes, SysUtils, SynEditStrConst, SynEditTypes, SynEditHighlighter;
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const
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tkNone = 0;
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tkText = 1;
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tkCustom = 2;
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MaxColumns = 100000;
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type
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TtkTokenKind = integer;
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TPositionToken = record
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Kind: TtkTokenKind;
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Column: integer;
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end;
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PPositionToken = ^TPositionToken;
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TPositionTokens = record
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Count: integer;
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Tokens: array[0..MaxColumns] of TPositionToken;
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end;
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PPositionTokens = ^TPositionTokens;
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TSynPositionHighlighter = class(TSynCustomHighlighter)
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private
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fCopiedAttributes: TList;
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fLine: string;
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fLineLen: integer;
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fLineNumber: Integer;
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fTokenEnd: LongInt; // end of current token
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fTextAttri: TSynHighlighterAttributes;
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fTokenPos: Integer;
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fTokenArrayPos: integer;
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FTokenKind: TtkTokenKind;
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fTokens: TList; // list of PPositionTokens
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function GetTokens(TheLineNumber: integer): PPositionTokens;
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protected
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function GetIdentChars: TSynIdentChars; override;
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function IsFilterStored: boolean; override; //mh 2000-10-08
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function GetPositionTokensSize(ItemCount: integer): integer;
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function GetDefaultAttribute(Index: integer): TSynHighlighterAttributes;
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override;
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public
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{$IFNDEF SYN_CPPB_1} class {$ENDIF}
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function GetLanguageName: string; override;
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public
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constructor Create(TheOwner: TComponent); override;
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destructor Destroy; override;
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function GetEol: Boolean; override;
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function GetRange: Pointer; override;
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function GetToken: string; override;
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{$IFDEF SYN_LAZARUS}
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procedure GetTokenEx(var TokenStart: PChar; var TokenLength: integer); override;
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{$ENDIF}
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function GetTokenAttribute: TSynHighlighterAttributes; override;
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function GetTokenKind: integer; override;
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function GetTokenPos: Integer; override;
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procedure Next; override;
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procedure ResetRange; override;
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procedure SetLine({$IFDEF FPC}const {$ENDIF}NewValue: string;
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LineNumber:Integer); override;
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procedure SetRange(Value: Pointer); override;
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function UseUserSettings(settingIndex: integer): boolean; override;
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procedure EnumUserSettings(settings: TStrings); override;
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property IdentChars;
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public
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procedure AddToken(Line, Col: integer; TokenKind: TtkTokenKind);
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procedure ClearTokens(Line: integer);
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procedure ClearAllCopiedAttributes;
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procedure ClearAllTokens;
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procedure InsertTokens(Lines: TStringList;
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Highlighter: TSynCustomHighlighter; Line, Col: integer);
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function GetCopiedTokenID(Attr: TSynHighlighterAttributes): TtkTokenKind;
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function GetCopiedAttribute(TokenID: TtkTokenKind): TSynHighlighterAttributes;
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property Tokens[TheLineNumber: integer]: PPositionTokens read GetTokens;
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published
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property TextAttri: TSynHighlighterAttributes read fTextAttri write fTextAttri;
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end;
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implementation
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{ TSynPositionHighlighter }
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function TSynPositionHighlighter.GetTokens(TheLineNumber: integer
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): PPositionTokens;
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begin
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if (TheLineNumber>=0) and (TheLineNumber<fTokens.Count) then
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Result:=PPositionTokens(fTokens[TheLineNumber])
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else
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Result:=nil;
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end;
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function TSynPositionHighlighter.GetIdentChars: TSynIdentChars;
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begin
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Result := ['_', '0'..'9', 'a'..'z', 'A'..'Z'];
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end;
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function TSynPositionHighlighter.IsFilterStored: boolean;
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begin
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Result:=true;
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end;
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function TSynPositionHighlighter.GetPositionTokensSize(ItemCount: integer
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): integer;
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begin
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Result:=SizeOf(integer)+SizeOf(TPositionToken)*ItemCount;
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end;
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function TSynPositionHighlighter.GetDefaultAttribute(Index: integer
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): TSynHighlighterAttributes;
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begin
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Result:=nil;
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end;
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{$IFNDEF SYN_CPPB_1} class {$ENDIF}
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function TSynPositionHighlighter.GetLanguageName: string;
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begin
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Result:='Position based highlighter';
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end;
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constructor TSynPositionHighlighter.Create(TheOwner: TComponent);
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begin
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inherited Create(TheOwner);
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fTokens:=TList.Create;
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fCopiedAttributes:=TList.Create;
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fTextAttri := TSynHighlighterAttributes.Create(SYNS_AttrText);
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AddAttribute(fTextAttri);
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SetAttributesOnChange({$IFDEF FPC}@{$ENDIF}DefHighlightChange);
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fDefaultFilter := '';
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end;
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destructor TSynPositionHighlighter.Destroy;
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begin
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ClearAllTokens;
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fTokens.Free;
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ClearAllCopiedAttributes;
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fCopiedAttributes.Free;
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inherited Destroy;
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end;
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function TSynPositionHighlighter.GetEol: Boolean;
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begin
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Result := fTokenKind = tkNone;
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end;
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function TSynPositionHighlighter.GetRange: Pointer;
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begin
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Result := Pointer(PtrInt(fLineNumber));
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end;
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function TSynPositionHighlighter.GetToken: string;
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var
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Len: LongInt;
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begin
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Len := fTokenEnd - fTokenPos;
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SetLength(Result,Len);
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System.Move(fLine[fTokenPos],Result[1],Len);
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end;
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{$IFDEF SYN_LAZARUS}
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procedure TSynPositionHighlighter.GetTokenEx(var TokenStart: PChar;
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var TokenLength: integer);
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begin
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TokenLength:=fTokenEnd-fTokenPos;
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if TokenLength>0 then begin
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TokenStart:=@fLine[fTokenPos];
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end else begin
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TokenStart:=nil;
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end;
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end;
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{$ENDIF}
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function TSynPositionHighlighter.GetTokenAttribute: TSynHighlighterAttributes;
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var
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t: TtkTokenKind;
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begin
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t:=GetTokenKind;
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if t=tkText then
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Result:=fTextAttri
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else if (t<0) then
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// this is a copied attribute
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Result:=GetCopiedAttribute(t)
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else
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Result:=nil;
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end;
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function TSynPositionHighlighter.GetTokenKind: integer;
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begin
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Result:=fTokenKind;
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end;
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function TSynPositionHighlighter.GetTokenPos: Integer;
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begin
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Result:=fTokenPos-1;
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end;
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procedure TSynPositionHighlighter.Next;
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var
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p: PPositionTokens;
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begin
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fTokenPos := fTokenEnd;
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if fTokenEnd>fLineLen then begin
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fTokenKind := tkNone;
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exit;
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end;
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inc(fTokenArrayPos);
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p:=Tokens[fLineNumber];
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if (p<>nil) and (p^.Count>fTokenArrayPos) then begin
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fTokenKind := p^.Tokens[fTokenArrayPos].Kind;
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fTokenEnd := p^.Tokens[fTokenArrayPos].Column+1;
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if fTokenEnd>fLineLen+1 then
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fTokenEnd := fLineLen+1;
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if fTokenEnd=fTokenPos then
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Next;
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end else begin
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fTokenEnd := fLineLen+1;
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fTokenKind := tkText;
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end;
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end;
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procedure TSynPositionHighlighter.ResetRange;
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begin
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inherited ResetRange;
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end;
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procedure TSynPositionHighlighter.SetLine(const NewValue: string;
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LineNumber: Integer);
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var
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p: PPositionTokens;
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begin
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fLine := NewValue;
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fLineLen := length(fLine);
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fLineNumber := LineNumber;
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fTokenArrayPos := 0;
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fTokenPos := 1;
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p:=Tokens[fLineNumber];
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if p<>nil then begin
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fTokenEnd := p^.Tokens[0].Column+1;
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if fTokenEnd>fLineLen+1 then
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fTokenEnd:=fLineLen+1;
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FTokenKind := p^.Tokens[0].Kind;
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if fTokenEnd=fTokenPos then Next;
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end else begin
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fTokenEnd := fLineLen+1;
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FTokenKind := tkText;
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end;
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end;
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procedure TSynPositionHighlighter.SetRange(Value: Pointer);
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begin
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inherited SetRange(Value);
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end;
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function TSynPositionHighlighter.UseUserSettings(settingIndex: integer
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): boolean;
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begin
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Result:=inherited UseUserSettings(settingIndex);
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end;
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procedure TSynPositionHighlighter.EnumUserSettings(settings: TStrings);
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begin
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inherited EnumUserSettings(settings);
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end;
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procedure TSynPositionHighlighter.AddToken(Line, Col: integer;
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TokenKind: TtkTokenKind);
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var
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p: PPositionTokens;
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TokenIndex, TokenCount: integer;
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begin
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if Col<1 then exit;
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// fill up lines
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while (Line>=fTokens.Count) do fTokens.Add(nil);
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// resize Token array
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p:=Tokens[Line];
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TokenIndex:=0;
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if p<>nil then
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TokenCount:=p^.Count+1
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else
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TokenCount:=1;
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ReAllocMem(p,GetPositionTokensSize(TokenCount));
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fTokens[Line]:=p;
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p^.Count:=TokenCount;
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// insert Token
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TokenIndex:=TokenCount-1;
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while (TokenIndex>0)
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and (p^.Tokens[TokenIndex-1].Column>Col) do
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dec(TokenIndex);
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if TokenIndex<TokenCount-1 then begin
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System.Move(p^.Tokens[TokenIndex],p^.Tokens[TokenIndex+1],
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SizeOf(TPositionToken)*(TokenCount-TokenIndex-1));
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end;
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with p^.Tokens[TokenIndex] do begin
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Kind:=TokenKind;
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Column:=Col;
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end;
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DefHighlightChange(Self);
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end;
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procedure TSynPositionHighlighter.ClearTokens(Line: integer);
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var
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p: pointer;
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begin
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if (Line>=0) and (Line<fTokens.Count) then begin
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p:=fTokens[Line];
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if p<>nil then begin
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FreeMem(p);
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fTokens[Line]:=nil;
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end;
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end;
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end;
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procedure TSynPositionHighlighter.ClearAllCopiedAttributes;
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var
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i: Integer;
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begin
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for i:=0 to fCopiedAttributes.Count-1 do
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TObject(fCopiedAttributes[i]).Free;
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fCopiedAttributes.Clear;
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end;
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procedure TSynPositionHighlighter.ClearAllTokens;
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var
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i: Integer;
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begin
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for i:=0 to fTokens.Count-1 do
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ClearTokens(i);
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fTokens.Clear;
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end;
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procedure TSynPositionHighlighter.InsertTokens(Lines: TStringList;
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Highlighter: TSynCustomHighlighter; Line, Col: integer);
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var
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RelLine: integer;
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nTokenLen: integer;
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sToken: PChar;
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Attr: TSynHighlighterAttributes;
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TokenID: integer;
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begin
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if (Lines=nil) or (Lines.Count=0) or (Highlighter=nil) then exit;
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RelLine:=0;
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while RelLine<Lines.Count do begin
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HighLighter.SetLine(Lines[RelLine], RelLine);
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while not Highlighter.GetEol do begin
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Attr:=Highlighter.GetTokenAttribute;
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TokenID:=GetCopiedTokenID(Attr);
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Highlighter.GetTokenEx(sToken,nTokenLen);
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inc(Col,nTokenLen);
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AddToken(Line,Col-1,TokenID);
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// next Token
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Highlighter.Next;
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end;
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// next line
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inc(Line);
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inc(RelLine);
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Col:=1;
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end;
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end;
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function TSynPositionHighlighter.GetCopiedTokenID(
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Attr: TSynHighlighterAttributes): TtkTokenKind;
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var
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i: Integer;
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CurAttr: TSynHighlighterAttributes;
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begin
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i:=fCopiedAttributes.Count-1;
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while i>=0 do begin
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CurAttr:=TSynHighlighterAttributes(fCopiedAttributes[i]);
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if (Attr.ForeGround=CurAttr.ForeGround)
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and (Attr.BackGround=CurAttr.BackGround)
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and (Attr.Style=CurAttr.Style) then begin
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// attribute already exists
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Result:=(-i-1);
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exit;
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end;
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dec(i);
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end;
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// create new attribute
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CurAttr:=TSynHighlighterAttributes.Create('');
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CurAttr.Assign(Attr);
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fCopiedAttributes.Add(CurAttr);
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Result:= -fCopiedAttributes.Count;
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end;
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function TSynPositionHighlighter.GetCopiedAttribute(TokenID: TtkTokenKind
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): TSynHighlighterAttributes;
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begin
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if (TokenID<0) and (fCopiedAttributes.Count>=-TokenID) then
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Result:=TSynHighlighterAttributes(fCopiedAttributes[-TokenID-1])
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else
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Result:=nil;
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end;
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end.
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