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CEF4Delphi/source/uCEFStreamReader.pas
Salvador Díaz Fau 6c5d5d6036 Update to CEF 3.3239.1723.g071d1c1
- New MDIExternalPumpBrowser demo.
- New JSWindowBindingSubProcess demo.
- Added more comments and checks in some initialization functions of TCEFApplication.
2018-01-06 15:25:32 +01:00

136 lines
4.3 KiB
ObjectPascal

// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF3 to embed a chromium-based
// browser in Delphi applications.
//
// The original license of DCEF3 still applies to CEF4Delphi.
//
// For more information about CEF4Delphi visit :
// https://www.briskbard.com/index.php?lang=en&pageid=cef
//
// Copyright © 2018 Salvador Díaz Fau. All rights reserved.
//
// ************************************************************************
// ************ vvvv Original license and comments below vvvv *************
// ************************************************************************
(*
* Delphi Chromium Embedded 3
*
* Usage allowed under the restrictions of the Lesser GNU General Public License
* or alternatively the restrictions of the Mozilla Public License 1.1
*
* 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.
*
* Unit owner : Henri Gourvest <hgourvest@gmail.com>
* Web site : http://www.progdigy.com
* Repository : http://code.google.com/p/delphichromiumembedded/
* Group : http://groups.google.com/group/delphichromiumembedded
*
* Embarcadero Technologies, Inc is not permitted to use or redistribute
* this source code without explicit permission.
*
*)
unit uCEFStreamReader;
{$IFNDEF CPUX64}
{$ALIGN ON}
{$MINENUMSIZE 4}
{$ENDIF}
{$I cef.inc}
interface
uses
{$IFDEF DELPHI16_UP}
System.Classes,
{$ELSE}
Classes,
{$ENDIF}
uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes;
type
TCefStreamReaderRef = class(TCefBaseRefCountedRef, ICefStreamReader)
protected
function Read(ptr: Pointer; size, n: NativeUInt): NativeUInt;
function Seek(offset: Int64; whence: Integer): Integer;
function Tell: Int64;
function Eof: Boolean;
function MayBlock: Boolean;
public
class function UnWrap(data: Pointer): ICefStreamReader;
class function CreateForFile(const filename: ustring): ICefStreamReader;
class function CreateForCustomStream(const stream: ICefCustomStreamReader): ICefStreamReader;
class function CreateForStream(const stream: TSTream; owned: Boolean): ICefStreamReader;
class function CreateForData(data: Pointer; size: NativeUInt): ICefStreamReader;
end;
implementation
uses
uCEFMiscFunctions, uCEFLibFunctions, uCEFCustomStreamReader;
class function TCefStreamReaderRef.CreateForCustomStream(
const stream: ICefCustomStreamReader): ICefStreamReader;
begin
Result := UnWrap(cef_stream_reader_create_for_handler(CefGetData(stream)))
end;
class function TCefStreamReaderRef.CreateForData(data: Pointer; size: NativeUInt): ICefStreamReader;
begin
Result := UnWrap(cef_stream_reader_create_for_data(data, size))
end;
class function TCefStreamReaderRef.CreateForFile(const filename: ustring): ICefStreamReader;
var
f: TCefString;
begin
f := CefString(filename);
Result := UnWrap(cef_stream_reader_create_for_file(@f))
end;
class function TCefStreamReaderRef.CreateForStream(const stream: TSTream;
owned: Boolean): ICefStreamReader;
begin
Result := CreateForCustomStream(TCefCustomStreamReader.Create(stream, owned) as ICefCustomStreamReader);
end;
function TCefStreamReaderRef.Eof: Boolean;
begin
Result := PCefStreamReader(FData)^.eof(PCefStreamReader(FData)) <> 0;
end;
function TCefStreamReaderRef.MayBlock: Boolean;
begin
Result := PCefStreamReader(FData)^.may_block(FData) <> 0;
end;
function TCefStreamReaderRef.Read(ptr: Pointer; size, n: NativeUInt): NativeUInt;
begin
Result := PCefStreamReader(FData)^.read(PCefStreamReader(FData), ptr, size, n);
end;
function TCefStreamReaderRef.Seek(offset: Int64; whence: Integer): Integer;
begin
Result := PCefStreamReader(FData)^.seek(PCefStreamReader(FData), offset, whence);
end;
function TCefStreamReaderRef.Tell: Int64;
begin
Result := PCefStreamReader(FData)^.tell(PCefStreamReader(FData));
end;
class function TCefStreamReaderRef.UnWrap(data: Pointer): ICefStreamReader;
begin
if data <> nil then
Result := Create(data) as ICefStreamReader else
Result := nil;
end;
end.