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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit Pdf.Instruction.Sink;
interface
uses
Collection.Stack,
Object_.List,
Pdf.Cursor,
Pdf.Instruction;
type
TPdfInstructionSink = class(TObject)
public
procedure Add(Instruction: TPdfInstruction); virtual; abstract;
function CursorStack(): TStack<TPdfCursor>; virtual; abstract;
function Cursor(): TPdfCursor; virtual; abstract;
end;
TDefaultPdfInstructionSink = class(TPdfInstructionSink)
protected
Instructions: TObjectList<TPdfInstruction>;
FCursor: TPdfCursor;
FCursorStack: TStack<TPdfCursor>;
public
constructor Create(Instructions: TObjectList<TPdfInstruction>; Cursor: TPdfCursor);
destructor Destroy(); override;
procedure Add(Instruction: TPdfInstruction); override;
function CursorStack(): TStack<TPdfCursor>; override;
function Cursor(): TPdfCursor; override;
end;
TPagedPdfInstructionSink = class(TPdfInstructionSink)
protected
FCursor: TPagedPdfCursor;
FCursorStack: TStack<TPdfCursor>;
public
constructor Create(Cursor: TPagedPdfCursor);
destructor Destroy(); override;
procedure Add(Instruction: TPdfInstruction); override;
function CursorStack(): TStack<TPdfCursor>; override;
function Cursor(): TPdfCursor; override;
end;
implementation
uses
Collection.Stack.List;
{ TPagedPdfInstructionSink }
procedure TPagedPdfInstructionSink.Add(Instruction: TPdfInstruction);
begin
FCursor.CurrentPage.Instructions.Add(Instruction);
end;
constructor TPagedPdfInstructionSink.Create(Cursor: TPagedPdfCursor);
begin
inherited Create();
FCursor := Cursor;
FCursorStack := TListStack<TPdfCursor>.Create();
FCursorStack.Push(Cursor);
end;
function TPagedPdfInstructionSink.Cursor(): TPdfCursor;
begin
Result := CursorStack.Top;
end;
function TPagedPdfInstructionSink.CursorStack(): TStack<TPdfCursor>;
begin
Result := FCursorStack;
end;
destructor TPagedPdfInstructionSink.Destroy();
begin
FCursorStack.Free();
inherited Destroy();
end;
{ TDefaultPdfInstructionSink }
procedure TDefaultPdfInstructionSink.Add(Instruction: TPdfInstruction);
begin
Instructions.Add(Instruction);
end;
constructor TDefaultPdfInstructionSink.Create(Instructions: TObjectList<TPdfInstruction>; Cursor: TPdfCursor);
begin
inherited Create();
Self.Instructions := Instructions;
FCursor := Cursor;
FCursorStack := TListStack<TPdfCursor>.Create();
FCursorStack.Push(Cursor);
end;
function TDefaultPdfInstructionSink.Cursor(): TPdfCursor;
begin
Result := FCursorStack.Top;
end;
function TDefaultPdfInstructionSink.CursorStack(): TStack<TPdfCursor>;
begin
Result := FCursorStack;
end;
destructor TDefaultPdfInstructionSink.Destroy();
begin
FCursorStack.Free();
inherited Destroy();
end;
end.
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