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CEF4Delphi/source/uCEFMediaObserverComponent.pas

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// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF 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 � 2020 Salvador Diaz 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 uCEFMediaObserverComponent;
{$IFDEF FPC}
{$MODE OBJFPC}{$H+}
{$ENDIF}
{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}
{$I cef.inc}
interface
uses
{$IFDEF DELPHI16_UP}
{$IFDEF MSWINDOWS}WinApi.Windows, WinApi.Messages, WinApi.ActiveX,{$ENDIF}
System.Classes, System.Math,
{$ELSE}
{$IFDEF MSWINDOWS}Windows, ActiveX,{$ENDIF} Classes, Math,
{$IFDEF FPC}
LCLProc, LCLType, LCLIntf, LResources, LMessages, InterfaceBase,
{$ELSE}
Messages,
{$ENDIF}
{$ENDIF}
uCEFTypes, uCEFInterfaces, uCEFMediaObserver, uCEFMediaObserverEvents;
type
{$IFNDEF FPC}{$IFDEF DELPHI16_UP}[ComponentPlatformsAttribute(pidWin32 or pidWin64)]{$ENDIF}{$ENDIF}
TCEFMediaObserverComponent = class(TComponent, ICefMediaObserverEvents)
protected
FMediaObserver : ICefMediaObserver;
FOnSinks : TOnSinksEvent;
FOnRoutes : TOnRoutesEvent;
FOnRouteStateChanged : TOnRouteStateChangedEvent;
FOnRouteMessageReceived : TOnRouteMessageReceivedEvent;
// ICefMediaObserverEvents
procedure doOnSinks(const sinks: TCefMediaSinkArray); virtual;
procedure doOnRoutes(const routes: TCefMediaRouteArray); virtual;
procedure doOnRouteStateChanged(const route: ICefMediaRoute; state: TCefMediaRouteConnectionState); virtual;
procedure doOnRouteMessageReceived(const route: ICefMediaRoute; const message_: Pointer; message_size: NativeUInt); virtual;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure AfterConstruction; override;
property MediaObserver : ICefMediaObserver read FMediaObserver;
published
property OnSinks : TOnSinksEvent read FOnSinks write FOnSinks;
property OnRoutes : TOnRoutesEvent read FOnRoutes write FOnRoutes;
property OnRouteStateChanged : TOnRouteStateChangedEvent read FOnRouteStateChanged write FOnRouteStateChanged;
property OnRouteMessageReceived : TOnRouteMessageReceivedEvent read FOnRouteMessageReceived write FOnRouteMessageReceived;
end;
{$IFDEF FPC}
procedure Register;
{$ENDIF}
implementation
// *********************************************************
// ********************** ATTENTION ! **********************
// *********************************************************
// ** **
// ** MANY OF THE EVENTS IN CEF4DELPHI COMPONENTS LIKE **
// ** TCHROMIUM, TFMXCHROMIUM OR TCEFAPPLICATION ARE **
// ** EXECUTED IN A CEF THREAD BY DEFAULT. **
// ** **
// ** WINDOWS CONTROLS MUST BE CREATED AND DESTROYED IN **
// ** THE SAME THREAD TO AVOID ERRORS. **
// ** SOME OF THEM RECREATE THE HANDLERS IF THEY ARE **
// ** MODIFIED AND CAN CAUSE THE SAME ERRORS. **
// ** **
// ** DON'T CREATE, MODIFY OR DESTROY WINDOWS CONTROLS **
// ** INSIDE THE CEF4DELPHI EVENTS AND USE **
// ** SYNCHRONIZATION OBJECTS TO PROTECT VARIABLES AND **
// ** FIELDS IF THEY ARE ALSO USED IN THE MAIN THREAD. **
// ** **
// ** READ THIS FOR MORE INFORMATION : **
// ** https://www.briskbard.com/index.php?pageid=cef **
// ** **
// ** USE OUR FORUMS FOR MORE QUESTIONS : **
// ** https://www.briskbard.com/forum/ **
// ** **
// *********************************************************
// *********************************************************
constructor TCEFMediaObserverComponent.Create(AOwner: TComponent);
begin
inherited Create(aOwner);
FMediaObserver := nil;
FOnSinks := nil;
FOnRoutes := nil;
FOnRouteStateChanged := nil;
FOnRouteMessageReceived := nil;
end;
destructor TCEFMediaObserverComponent.Destroy;
begin
FMediaObserver := nil;
inherited Destroy;
end;
procedure TCEFMediaObserverComponent.AfterConstruction;
begin
inherited AfterConstruction;
FMediaObserver := TCustomMediaObserver.Create(self);
end;
procedure TCEFMediaObserverComponent.doOnSinks(const sinks: TCefMediaSinkArray);
begin
if assigned(FOnSinks) then
FOnSinks(self, sinks);
end;
procedure TCEFMediaObserverComponent.doOnRoutes(const routes: TCefMediaRouteArray);
begin
if assigned(FOnRoutes) then
FOnRoutes(self, routes);
end;
procedure TCEFMediaObserverComponent.doOnRouteStateChanged(const route : ICefMediaRoute;
state : TCefMediaRouteConnectionState);
begin
if assigned(FOnRouteStateChanged) then
FOnRouteStateChanged(self, route, state);
end;
procedure TCEFMediaObserverComponent.doOnRouteMessageReceived(const route : ICefMediaRoute;
const message_ : Pointer;
message_size : NativeUInt);
begin
if assigned(FOnRouteMessageReceived) then
FOnRouteMessageReceived(self, route, message_, message_size);
end;
{$IFDEF FPC}
procedure Register;
begin
{$I res/tcefmediaobservercomponent.lrs}
RegisterComponents('Chromium', [TCEFMediaObserverComponent]);
end;
{$ENDIF}
end.