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{******************************************************************}
{ SVG style class }
{ }
{ home page : http://www.mwcs.de }
{ email : martin.walter@mwcs.de }
{ }
{ date : 26-04-2005 }
{ }
{ Use of this file is permitted for commercial and non-commercial }
{ use, as long as the author is credited. }
{ This file (c) 2005 Martin Walter }
{ }
{ Thanks to: }
{ Kiriakos Vlahos (Process Stylesheet) }
{ }
{ This Software is distributed on an "AS IS" basis, WITHOUT }
{ WARRANTY OF ANY KIND, either express or implied. }
{ }
{ *****************************************************************}
unit SVGStyle;
interface
uses
System.Classes, System.Contnrs;
type
TStyle = class(TObject)
strict private
FValues: TStrings;
function GetCount: Integer;
procedure PutValues(const Key: string; const Value: string);
function GetValues(const Key: string): string;
procedure PutValuesByNum(const Index: Integer; const Value: string);
function GetValuesByNum(const Index: Integer): string;
procedure PutKey(const Index: Integer; const Key: string);
function GetKey(const Index: Integer): string;
function Dequote(const Value: string): string;
private
FName: string;
strict private
FOnChange: TNotifyEvent;
procedure DoOnChange;
public
constructor Create;
destructor Destroy; override;
procedure Clear;
function Clone: TStyle;
procedure SetValues(const Values: string);
function AddStyle(const Key, Value: string): Integer;
function IndexOf(const Key: string): Integer;
procedure Delete(Index: Integer);
function Remove(const Key: string): Integer;
property Count: Integer read GetCount;
property Values[const Key: string]: string read GetValues write PutValues; default;
property ValuesByNum[const Index: Integer]: string read GetValuesByNum write PutValuesByNum;
property Keys[const Index: Integer]: string read GetKey write PutKey;
property OnChange: TNotifyEvent read FOnChange write FOnChange;
end;
TStyleList = class(TObject)
strict private
FList: TObjectList;
function GetCount: Integer;
function GetStyle(const Index: Integer): TStyle;
procedure PutStyle(const Index: Integer; Style: TStyle);
public
constructor Create;
destructor Destroy; override;
procedure Clear;
function Clone: TStyleList;
procedure Delete(Index: Integer);
function Remove(const Style: TStyle): Integer;
function Add(const AStyle: TStyle): Integer; overload;
function Add(const Name, Values: string): Integer; overload;
function Add(const AStyle: string): Integer; overload;
procedure Insert(Index: Integer; Style: TStyle); overload;
procedure Insert(Index: Integer; const Name, Values: string); overload;
procedure Exchange(Index1, Index2: Integer);
procedure Move(CurIndex, NewIndex: Integer);
function IndexOf(Style: TStyle): Integer;
function GetStyleByName(const Name: string): TStyle;
property Style[const Index: Integer]: TStyle read GetStyle write PutStyle; default;
property Count: Integer read GetCount;
end;
procedure ProcessStyleSheet(Var S: string);
implementation
uses
System.SysUtils, System.StrUtils, System.Character;
{$REGION 'TStyle'}
constructor TStyle.Create;
begin
inherited;
FValues := TStringList.Create;
FValues.NameValueSeparator := '"';
end;
destructor TStyle.Destroy;
begin
FreeAndNil(FValues);
inherited;
end;
procedure TStyle.Clear;
begin
if FValues <> nil then
begin
FValues.Clear;
end;
end;
function TStyle.Clone: TStyle;
begin
Result := TStyle.Create;
Result.FName := FName;
Result.FValues.Assign(FValues);
end;
function TStyle.GetCount: Integer;
begin
Result := FValues.Count;
end;
procedure TStyle.DoOnChange;
begin
if Assigned(FOnChange) then
begin
FOnChange(Self);
end;
end;
procedure TStyle.PutValues(const Key: string; const Value: string);
var
Index: Integer;
begin
Index := IndexOf(Key);
if Index > 0 then
PutValuesByNum(Index, Value)
else
AddStyle(Key, Value);
end;
function TStyle.GetValues(const Key: string): string;
begin
Result := GetValuesByNum(IndexOf(Key));
end;
procedure TStyle.PutValuesByNum(const Index: Integer; const Value: string);
begin
if (Index >= 0) and (Index < FValues.Count) then
FValues.ValueFromIndex[Index] := DeQuote(Value);
end;
function TStyle.GetValuesByNum(const Index: Integer): string;
begin
if (Index >= 0) and (Index < FValues.Count) then
Result := FValues.ValueFromIndex[Index]
else
Result := '';
end;
procedure TStyle.PutKey(const Index: Integer; const Key: string);
begin
if (Index >= 0) and (Index < FValues.Count) then
FValues[Index] := Key + FValues.NameValueSeparator + FValues.ValueFromIndex[Index];
end;
function TStyle.GetKey(const Index: Integer): string;
begin
if (Index >= 0) and (Index < FValues.Count) then
Result := FValues.Names[Index]
else
Result := '';
end;
function TStyle.Dequote(const Value: string): string;
begin
if Value <> '' then
begin
if (Value[1] = '''') and (Value[Length(Value)] = '''') then
Result := Copy(Value, 2, Length(Value) - 2)
else
if (Value[1] = '"') and (Value[Length(Value)] = '"') then
Result := Copy(Value, 2, Length(Value) - 2)
else
Result := Value;
end else
Result := Value;
end;
procedure TStyle.SetValues(const Values: string);
var
C: Integer;
Key: string;
Value: string;
Help: string;
begin
Help := Trim(Values);
while Help <> '' do
begin
C := Pos(';', Help);
if C = 0 then
C := Length(Help) + 1;
Key := Copy(Help, 1, C - 1);
Help := Trim(Copy(Help, C + 1, MaxInt));
C := Pos(':', Key);
if C <> 0 then
begin
Value := Trim(Copy(Key, C + 1, MaxInt));
Key := Trim(Copy(Key, 1, C - 1));
C := IndexOf(Key);
if C = -1 then
FValues.Add(Key + FValues.NameValueSeparator + DeQuote(Value))
else
PutValuesByNum(C, Value);
end;
end;
end;
function TStyle.AddStyle(const Key, Value: string): Integer;
begin
Result := IndexOf(Key);
if Result = -1 then
Result := FValues.Add(Key + FValues.NameValueSeparator + DeQuote(Value))
else
PutValuesByNum(Result, Value);
DoOnChange;
end;
function TStyle.IndexOf(const Key: string): Integer;
begin
for Result := 0 to FValues.Count - 1 do
begin
if FValues.Names[Result] = Key then
Exit;
end;
Result := -1;
end;
procedure TStyle.Delete(Index: Integer);
begin
if (Index >= 0) and (Index < FValues.Count) then
begin
FValues.Delete(Index);
end;
end;
function TStyle.Remove(const Key: string): Integer;
begin
Result := IndexOf(Key);
Delete(Result);
end;
{$ENDREGION}
{$REGION 'TStyleList'}
constructor TStyleList.Create;
begin
inherited;
FList := TObjectList.Create(False);
end;
destructor TStyleList.Destroy;
begin
Clear;
FList.Free;
inherited;
end;
procedure TStyleList.Clear;
begin
while FList.Count > 0 do
begin
TStyle(FList[0]).Free;
FList.Delete(0);
end;
end;
function TStyleList.Clone: TStyleList;
var
C: Integer;
begin
Result := TStyleList.Create;
for C := 0 to FList.Count - 1 do
Result.Add(GetStyle(C).Clone);
end;
function TStyleList.GetCount: Integer;
begin
Result := FList.Count;
end;
function TStyleList.GetStyle(const Index: Integer): TStyle;
begin
if (Index >= 0) and (Index < FList.Count) then
Result := TStyle(FList[Index])
else
Result := nil;
end;
procedure TStyleList.PutStyle(const Index: Integer; Style: TStyle);
begin
if (Index >= 0) and (Index < FList.Count) then
begin
FList[Index].Free;
FList[Index] := Style;
end;
end;
procedure TStyleList.Delete(Index: Integer);
begin
if (Index >= 0) and (Index < FList.Count) then
begin
FList[Index].Free;
FList.Delete(Index);
end;
end;
function TStyleList.Remove(const Style: TStyle): Integer;
begin
Result := IndexOf(Style);
Delete(Result);
end;
function TStyleList.Add(const AStyle: TStyle): Integer;
begin
Result := FList.Add(AStyle);
end;
function TStyleList.Add(const Name, Values: string): Integer;
var
S: TStyle;
begin
S := TStyle.Create;
S.FName := Name;
S.SetValues(Values);
Result := Add(S);
end;
function TStyleList.Add(const AStyle: string): Integer;
var
Name: string;
StyleStr: string;
Values: string;
C: Integer;
D: Integer;
begin
Result := -1;
StyleStr := Trim(AStyle);
for C := Low(StyleStr) to High(StyleStr) do
begin
if StyleStr[C] = '{' then
begin
for D := High(StyleStr) downto C + 1 do
begin
if StyleStr[D] = '}' then
begin
Name := Trim(Copy(StyleStr, 1, C - 1));
Values := Copy(StyleStr, C + 1, D - C - 1);
Result := Add(Name, Values);
end;
end;
end;
end;
end;
procedure TStyleList.Insert(Index: Integer; Style: TStyle);
begin
if (Index >= 0) and (Index < FList.Count) then
FList.Insert(Index, Style);
end;
procedure TStyleList.Insert(Index: Integer; const Name, Values: string);
var
S: TStyle;
begin
if (Index >= 0) and (Index < FList.Count) then
begin
S := TStyle.Create;
S.FName := Name;
S.SetValues(Values);
Insert(Index, S);
end;
end;
procedure TStyleList.Exchange(Index1, Index2: Integer);
begin
if (Index1 >= 0) and (Index1 < FList.Count) and
(Index2 >= 0) and (Index2 < FList.Count) then
FList.Exchange(Index1, Index2);
end;
procedure TStyleList.Move(CurIndex, NewIndex: Integer);
begin
if (CurIndex >= 0) and (CurIndex < FList.Count) and
(NewIndex >= 0) and (NewIndex < FList.Count) then
FList.Move(CurIndex, NewIndex);
end;
function TStyleList.IndexOf(Style: TStyle): Integer;
begin
Result := FList.IndexOf(Style);
end;
function TStyleList.GetStyleByName(const Name: string): TStyle;
var
C: Integer;
begin
for C := 0 to FList.Count - 1 do
begin
Result := TStyle(FList[C]);
if Result.FName = Name then
Exit;
end;
Result := nil;
end;
procedure ProcessStyleSheet(Var S: string);
Var
OutS: string;
C: Char;
begin
OutS := '';
for C in S do
begin
if C = ' ' then Continue;
if C = '}' then
OutS := OutS + C + SLineBreak
else
OutS := OutS + C;
end;
S := OutS;
end;
{$ENDREGION}
end.