CEF4Delphi/source/uCEFRequestContextHandler.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 © 2019 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 uCEFRequestContextHandler;

{$IFDEF FPC}
  {$MODE OBJFPC}{$H+}
{$ENDIF}

{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}

{$I cef.inc}

interface

uses
  uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes;

type
  TCefRequestContextHandlerRef = class(TCefBaseRefCountedRef, ICefRequestContextHandler)
    protected
      procedure OnRequestContextInitialized(const request_context: ICefRequestContext);
      function  GetCookieManager: ICefCookieManager;
      function  OnBeforePluginLoad(const mimeType, pluginUrl: ustring; isMainFrame : boolean; const topOriginUrl: ustring; const pluginInfo: ICefWebPluginInfo; pluginPolicy: PCefPluginPolicy): Boolean;

    public
      class function UnWrap(data: Pointer): ICefRequestContextHandler;
  end;

  TCefRequestContextHandlerOwn = class(TCefBaseRefCountedOwn, ICefRequestContextHandler)
    protected
      procedure OnRequestContextInitialized(const request_context: ICefRequestContext);
      function  GetCookieManager: ICefCookieManager; virtual;
      function  OnBeforePluginLoad(const mimeType, pluginUrl: ustring; isMainFrame : boolean; const topOriginUrl: ustring; const pluginInfo: ICefWebPluginInfo; pluginPolicy: PCefPluginPolicy): Boolean; virtual;

    public
      constructor Create; virtual;
  end;

  TCefFastRequestContextHandler = class(TCefRequestContextHandlerOwn)
    protected
      FProc: TCefRequestContextHandlerProc;

      function GetCookieManager: ICefCookieManager; override;

    public
      constructor Create(const proc: TCefRequestContextHandlerProc); reintroduce;
  end;

implementation

uses
  uCEFMiscFunctions, uCEFLibFunctions, uCEFCookieManager, uCEFWebPluginInfo, uCEFRequestContext;

// TCefRequestContextHandlerOwn

procedure cef_request_context_handler_on_request_context_initialized(self            : PCefRequestContextHandler;
                                                                     request_context : PCefRequestContext); stdcall;
var
  TempObject : TObject;
begin
  TempObject := CefGetObject(self);

  if (TempObject <> nil) and (TempObject is TCefRequestContextHandlerOwn) then
    TCefRequestContextHandlerOwn(TempObject).OnRequestContextInitialized(TCefRequestContextRef.UnWrap(request_context));
end;

function cef_request_context_handler_get_cookie_manager(self: PCefRequestContextHandler): PCefCookieManager; stdcall;
var
  TempObject : TObject;
begin
  Result     := nil;
  TempObject := CefGetObject(self);

  if (TempObject <> nil) and (TempObject is TCefRequestContextHandlerOwn) then
    Result := CefGetData(TCefRequestContextHandlerOwn(TempObject).GetCookieManager());
end;

function cef_request_context_handler_on_before_plugin_load(      self           : PCefRequestContextHandler;
                                                           const mime_type      : PCefString;
                                                           const plugin_url     : PCefString;
                                                                 is_main_frame  : integer;
                                                           const top_origin_url : PCefString;
                                                                 plugin_info    : PCefWebPluginInfo;
                                                                 plugin_policy  : PCefPluginPolicy): Integer; stdcall;
var
  TempObject : TObject;
begin
  Result     := Ord(False);
  TempObject := CefGetObject(self);

  if (TempObject <> nil) and (TempObject is TCefRequestContextHandlerOwn) then
    Result := Ord(TCefRequestContextHandlerOwn(TempObject).OnBeforePluginLoad(CefString(mime_type),
                                                                              CefString(plugin_url),
                                                                              (is_main_frame <> 0),
                                                                              CefString(top_origin_url),
                                                                              TCefWebPluginInfoRef.UnWrap(plugin_info),
                                                                              plugin_policy));
end;

constructor TCefRequestContextHandlerOwn.Create;
begin
  inherited CreateData(SizeOf(TCefRequestContextHandler));

  with PCefRequestContextHandler(FData)^ do
    begin
      on_request_context_initialized := {$IFDEF FPC}@{$ENDIF}cef_request_context_handler_on_request_context_initialized;
      get_cookie_manager             := {$IFDEF FPC}@{$ENDIF}cef_request_context_handler_get_cookie_manager;
      on_before_plugin_load          := {$IFDEF FPC}@{$ENDIF}cef_request_context_handler_on_before_plugin_load;
    end;
end;

procedure TCefRequestContextHandlerOwn.OnRequestContextInitialized(const request_context: ICefRequestContext);
begin

  //
end;

function TCefRequestContextHandlerOwn.GetCookieManager: ICefCookieManager;
begin
  Result:= nil;
end;

function TCefRequestContextHandlerOwn.OnBeforePluginLoad(const mimeType     : ustring;
                                                         const pluginUrl    : ustring;
                                                               isMainFrame  : boolean;
                                                         const topOriginUrl : ustring;
                                                         const pluginInfo   : ICefWebPluginInfo;
                                                               pluginPolicy : PCefPluginPolicy): Boolean;
begin
  Result := False;
end;

// TCefRequestContextHandlerRef

procedure TCefRequestContextHandlerRef.OnRequestContextInitialized(const request_context: ICefRequestContext);
begin

  PCefRequestContextHandler(FData)^.on_request_context_initialized(PCefRequestContextHandler(FData), CefGetData(request_context));
end;

function TCefRequestContextHandlerRef.GetCookieManager: ICefCookieManager;
begin
  Result := TCefCookieManagerRef.UnWrap(PCefRequestContextHandler(FData)^.get_cookie_manager(PCefRequestContextHandler(FData)));
end;

function TCefRequestContextHandlerRef.OnBeforePluginLoad(const mimeType     : ustring;
                                                         const pluginUrl    : ustring;
                                                               isMainFrame  : boolean;
                                                         const topOriginUrl : ustring;
                                                         const pluginInfo   : ICefWebPluginInfo;
                                                               pluginPolicy : PCefPluginPolicy): Boolean;
var
  TempType, TempPluginURL, TempOriginURL : TCefString;
begin
  TempType      := CefString(mimeType);
  TempPluginURL := CefString(pluginUrl);
  TempOriginURL := CefString(topOriginUrl);

  Result := PCefRequestContextHandler(FData)^.on_before_plugin_load(PCefRequestContextHandler(FData),
                                                                    @TempType,
                                                                    @TempPluginURL,
                                                                    ord(isMainFrame),
                                                                    @TempOriginURL,
                                                                    CefGetData(pluginInfo),
                                                                    pluginPolicy) <> 0;
end;

class function TCefRequestContextHandlerRef.UnWrap(data: Pointer): ICefRequestContextHandler;
begin
  if (data <> nil) then
    Result := Create(data) as ICefRequestContextHandler
   else
    Result := nil;
end;

// TCefFastRequestContextHandler

constructor TCefFastRequestContextHandler.Create(const proc: TCefRequestContextHandlerProc);
begin
  FProc := proc;

  inherited Create;
end;

function TCefFastRequestContextHandler.GetCookieManager: ICefCookieManager;
begin
  Result := FProc();
end;

end.