CEF4Delphi/demos/Delphi_VCL/JavaScript/JSRTTIExtension/uTestExtension.pas

// ************************************************************************
// ***************************** 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 <20> 2017 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 uTestExtension;

{$I cef.inc}

interface

uses
  {$IFDEF DELPHI16_UP}
  Winapi.Windows,
  {$ELSE}
  Windows,
  {$ENDIF}
  uCEFRenderProcessHandler, uCEFBrowserProcessHandler, uCEFInterfaces, uCEFProcessMessage,
  uCEFv8Context, uCEFTypes, uCEFv8Handler;

type
  TTestExtension = class
    class procedure mouseover(const data: string);
    class procedure sendresulttobrowser(const msgtext, msgname : string);
  end;

implementation

uses
  uCEFMiscFunctions, uCEFConstants, uJSRTTIExtension;

class procedure TTestExtension.mouseover(const data: string);
var
  TempMessage : ICefProcessMessage;
  TempFrame   : ICefFrame;
begin
  try
    TempMessage := TCefProcessMessageRef.New(MOUSEOVER_MESSAGE_NAME);
    TempMessage.ArgumentList.SetString(0, data);

    // Sending a message back to the browser. It'll be received in the TChromium.OnProcessMessageReceived event.
    // TCefv8ContextRef.Current returns the v8 context for the frame that is currently executing Javascript.

    TempFrame := TCefv8ContextRef.Current.Browser.MainFrame;

    if (TempFrame <> nil) and TempFrame.IsValid then
      TempFrame.SendProcessMessage(PID_BROWSER, TempMessage);
  finally
    TempMessage := nil;
  end;
end;

class procedure TTestExtension.sendresulttobrowser(const msgtext, msgname : string);
var
  TempMessage : ICefProcessMessage;
  TempFrame   : ICefFrame;
begin
  try
    TempMessage := TCefProcessMessageRef.New(msgname);
    TempMessage.ArgumentList.SetString(0, msgtext);

    TempFrame := TCefv8ContextRef.Current.Browser.MainFrame;

    if (TempFrame <> nil) and TempFrame.IsValid then
      TempFrame.SendProcessMessage(PID_BROWSER, TempMessage);
  finally
    TempMessage := nil;
  end;
end;

end.