mirror of
https://github.com/salvadordf/CEF4Delphi.git
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137 lines
4.4 KiB
ObjectPascal
137 lines
4.4 KiB
ObjectPascal
// ************************************************************************
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// ***************************** CEF4Delphi *******************************
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// ************************************************************************
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//
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// CEF4Delphi is based on DCEF3 which uses CEF to embed a chromium-based
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// browser in Delphi applications.
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//
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// The original license of DCEF3 still applies to CEF4Delphi.
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//
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// For more information about CEF4Delphi visit :
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// https://www.briskbard.com/index.php?lang=en&pageid=cef
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//
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// Copyright © 2021 Salvador Diaz Fau. All rights reserved.
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//
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// ************************************************************************
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// ************ vvvv Original license and comments below vvvv *************
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// ************************************************************************
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(*
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* Delphi Chromium Embedded 3
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*
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* Usage allowed under the restrictions of the Lesser GNU General Public License
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* or alternatively the restrictions of the Mozilla Public License 1.1
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*
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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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*
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* Unit owner : Henri Gourvest <hgourvest@gmail.com>
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* Web site : http://www.progdigy.com
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* Repository : http://code.google.com/p/delphichromiumembedded/
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* Group : http://groups.google.com/group/delphichromiumembedded
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*
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* Embarcadero Technologies, Inc is not permitted to use or redistribute
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* this source code without explicit permission.
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*
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*)
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unit uCEFStreamReader;
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{$IFDEF FPC}
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{$MODE OBJFPC}{$H+}
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{$ENDIF}
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{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
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{$MINENUMSIZE 4}
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{$I cef.inc}
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interface
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uses
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{$IFDEF DELPHI16_UP}
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System.Classes,
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{$ELSE}
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Classes,
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{$ENDIF}
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uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes;
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type
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TCefStreamReaderRef = class(TCefBaseRefCountedRef, ICefStreamReader)
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protected
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function Read(ptr: Pointer; size, n: NativeUInt): NativeUInt;
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function Seek(offset: Int64; whence: Integer): Integer;
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function Tell: Int64;
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function Eof: Boolean;
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function MayBlock: Boolean;
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public
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class function UnWrap(data: Pointer): ICefStreamReader;
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class function CreateForFile(const filename: ustring): ICefStreamReader;
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class function CreateForCustomStream(const stream: ICefCustomStreamReader): ICefStreamReader;
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class function CreateForStream(const stream: TSTream; owned: Boolean): ICefStreamReader;
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class function CreateForData(data: Pointer; size: NativeUInt): ICefStreamReader;
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end;
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implementation
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uses
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uCEFMiscFunctions, uCEFLibFunctions, uCEFCustomStreamReader;
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class function TCefStreamReaderRef.CreateForCustomStream(const stream: ICefCustomStreamReader): ICefStreamReader;
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begin
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Result := UnWrap(cef_stream_reader_create_for_handler(CefGetData(stream)))
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end;
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class function TCefStreamReaderRef.CreateForData(data: Pointer; size: NativeUInt): ICefStreamReader;
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begin
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Result := UnWrap(cef_stream_reader_create_for_data(data, size))
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end;
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class function TCefStreamReaderRef.CreateForFile(const filename: ustring): ICefStreamReader;
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var
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TempFileName : TCefString;
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begin
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TempFileName := CefString(filename);
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Result := UnWrap(cef_stream_reader_create_for_file(@TempFileName))
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end;
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class function TCefStreamReaderRef.CreateForStream(const stream: TSTream; owned: Boolean): ICefStreamReader;
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begin
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Result := CreateForCustomStream(TCefCustomStreamReader.Create(stream, owned) as ICefCustomStreamReader);
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end;
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function TCefStreamReaderRef.Eof: Boolean;
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begin
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Result := PCefStreamReader(FData)^.eof(PCefStreamReader(FData)) <> 0;
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end;
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function TCefStreamReaderRef.MayBlock: Boolean;
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begin
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Result := PCefStreamReader(FData)^.may_block(PCefStreamReader(FData)) <> 0;
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end;
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function TCefStreamReaderRef.Read(ptr: Pointer; size, n: NativeUInt): NativeUInt;
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begin
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Result := PCefStreamReader(FData)^.read(PCefStreamReader(FData), ptr, size, n);
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end;
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function TCefStreamReaderRef.Seek(offset: Int64; whence: Integer): Integer;
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begin
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Result := PCefStreamReader(FData)^.seek(PCefStreamReader(FData), offset, whence);
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end;
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function TCefStreamReaderRef.Tell: Int64;
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begin
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Result := PCefStreamReader(FData)^.tell(PCefStreamReader(FData));
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end;
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class function TCefStreamReaderRef.UnWrap(data: Pointer): ICefStreamReader;
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begin
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if (data <> nil) then
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Result := Create(data) as ICefStreamReader
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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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