mirror of
https://github.com/salvadordf/CEF4Delphi.git
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298 lines
14 KiB
ObjectPascal
298 lines
14 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 © 2022 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 uCEFRequestContextHandler;
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{$IFDEF FPC}
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{$MODE OBJFPC}{$H+}
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{$ENDIF}
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{$I cef.inc}
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{$IFNDEF TARGET_64BITS}{$ALIGN ON}{$ENDIF}
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{$MINENUMSIZE 4}
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interface
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uses
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{$IFDEF DELPHI16_UP}
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System.SysUtils,
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{$ELSE}
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SysUtils,
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{$ENDIF}
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uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes;
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type
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TCefRequestContextHandlerRef = class(TCefBaseRefCountedRef, ICefRequestContextHandler)
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protected
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procedure OnRequestContextInitialized(const request_context: ICefRequestContext);
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procedure GetResourceRequestHandler(const browser: ICefBrowser; const frame: ICefFrame; const request: ICefRequest; is_navigation, is_download: boolean; const request_initiator: ustring; var disable_default_handling: boolean; var aResourceRequestHandler : ICefResourceRequestHandler);
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procedure RemoveReferences; virtual;
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public
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class function UnWrap(data: Pointer): ICefRequestContextHandler;
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end;
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TCefRequestContextHandlerOwn = class(TCefBaseRefCountedOwn, ICefRequestContextHandler)
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protected
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procedure OnRequestContextInitialized(const request_context: ICefRequestContext); virtual;
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procedure GetResourceRequestHandler(const browser: ICefBrowser; const frame: ICefFrame; const request: ICefRequest; is_navigation, is_download: boolean; const request_initiator: ustring; var disable_default_handling: boolean; var aResourceRequestHandler : ICefResourceRequestHandler); virtual;
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procedure RemoveReferences; virtual;
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public
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constructor Create; virtual;
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end;
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TCustomRequestContextHandler = class(TCefRequestContextHandlerOwn)
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protected
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FEvents : Pointer;
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procedure OnRequestContextInitialized(const request_context: ICefRequestContext); override;
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procedure GetResourceRequestHandler(const browser: ICefBrowser; const frame: ICefFrame; const request: ICefRequest; is_navigation, is_download: boolean; const request_initiator: ustring; var disable_default_handling: boolean; var aResourceRequestHandler : ICefResourceRequestHandler); override;
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public
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constructor Create(const events : IChromiumEvents); reintroduce; virtual;
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procedure BeforeDestruction; override;
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procedure RemoveReferences; override;
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end;
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implementation
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uses
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uCEFMiscFunctions, uCEFLibFunctions, uCEFBrowser, uCEFFrame, uCEFRequest,
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uCEFRequestContext, uCEFResourceRequestHandler;
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// TCefRequestContextHandlerOwn
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procedure cef_request_context_handler_on_request_context_initialized(self : PCefRequestContextHandler;
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request_context : PCefRequestContext); stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefRequestContextHandlerOwn) then
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TCefRequestContextHandlerOwn(TempObject).OnRequestContextInitialized(TCefRequestContextRef.UnWrap(request_context));
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end;
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function cef_request_context_handler_get_resource_request_handler( self : PCefRequestContextHandler;
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browser : PCefBrowser;
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frame : PCefFrame;
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request : PCefRequest;
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is_navigation : Integer;
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is_download : Integer;
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const request_initiator : PCefString;
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disable_default_handling : PInteger): PCefResourceRequestHandler; stdcall;
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var
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TempObject : TObject;
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TempDisableDefHandling : Boolean;
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TempResourceRequestHandler : ICefResourceRequestHandler;
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begin
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Result := nil;
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TempResourceRequestHandler := nil;
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TempObject := CefGetObject(self);
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TempDisableDefHandling := disable_default_handling^ <> 0;
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if (TempObject <> nil) and (TempObject is TCefRequestContextHandlerOwn) then
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try
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TCefRequestContextHandlerOwn(TempObject).GetResourceRequestHandler(TCefBrowserRef.UnWrap(browser),
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TCefFrameRef.UnWrap(frame),
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TCefRequestRef.UnWrap(request),
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is_navigation <> 0,
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is_download <> 0,
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CefString(request_initiator),
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TempDisableDefHandling,
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TempResourceRequestHandler);
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Result := CefGetData(TempResourceRequestHandler);
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disable_default_handling^ := Ord(TempDisableDefHandling);
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finally
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TempResourceRequestHandler := nil;
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end;
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end;
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constructor TCefRequestContextHandlerOwn.Create;
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begin
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inherited CreateData(SizeOf(TCefRequestContextHandler));
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with PCefRequestContextHandler(FData)^ do
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begin
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on_request_context_initialized := {$IFDEF FPC}@{$ENDIF}cef_request_context_handler_on_request_context_initialized;
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get_resource_request_handler := {$IFDEF FPC}@{$ENDIF}cef_request_context_handler_get_resource_request_handler;
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end;
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end;
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procedure TCefRequestContextHandlerOwn.OnRequestContextInitialized(const request_context: ICefRequestContext);
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begin
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//
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end;
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procedure TCefRequestContextHandlerOwn.GetResourceRequestHandler(const browser : ICefBrowser;
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const frame : ICefFrame;
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const request : ICefRequest;
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is_navigation : boolean;
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is_download : boolean;
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const request_initiator : ustring;
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var disable_default_handling : boolean;
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var aResourceRequestHandler : ICefResourceRequestHandler);
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begin
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aResourceRequestHandler := nil;
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end;
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procedure TCefRequestContextHandlerOwn.RemoveReferences;
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begin
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//
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end;
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// TCefRequestContextHandlerRef
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procedure TCefRequestContextHandlerRef.OnRequestContextInitialized(const request_context: ICefRequestContext);
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begin
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PCefRequestContextHandler(FData)^.on_request_context_initialized(PCefRequestContextHandler(FData), CefGetData(request_context));
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end;
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procedure TCefRequestContextHandlerRef.GetResourceRequestHandler(const browser : ICefBrowser;
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const frame : ICefFrame;
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const request : ICefRequest;
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is_navigation : boolean;
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is_download : boolean;
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const request_initiator : ustring;
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var disable_default_handling : boolean;
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var aResourceRequestHandler : ICefResourceRequestHandler);
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var
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TempRequestInitiator : TCefString;
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TempDisableDefaultHandling : integer;
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TempResourceRequestHandler : PCefResourceRequestHandler;
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begin
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TempRequestInitiator := CefString(request_initiator);
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TempDisableDefaultHandling := ord(disable_default_handling);
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TempResourceRequestHandler := PCefRequestContextHandler(FData)^.get_resource_request_handler(PCefRequestContextHandler(FData),
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CefGetData(browser),
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CefGetData(frame),
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CefGetData(request),
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ord(is_navigation),
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ord(is_download),
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@TempRequestInitiator,
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@TempDisableDefaultHandling);
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disable_default_handling := TempDisableDefaultHandling <> 0;
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if (TempResourceRequestHandler <> nil) then
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aResourceRequestHandler := TCefResourceRequestHandlerRef.UnWrap(TempResourceRequestHandler)
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else
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aResourceRequestHandler := nil;
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end;
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procedure TCefRequestContextHandlerRef.RemoveReferences;
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begin
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//
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end;
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class function TCefRequestContextHandlerRef.UnWrap(data: Pointer): ICefRequestContextHandler;
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begin
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if (data <> nil) then
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Result := Create(data) as ICefRequestContextHandler
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else
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Result := nil;
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end;
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// TCustomRequestContextHandler
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constructor TCustomRequestContextHandler.Create(const events : IChromiumEvents);
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begin
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inherited Create;
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FEvents := Pointer(events);
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end;
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procedure TCustomRequestContextHandler.BeforeDestruction;
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begin
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FEvents := nil;
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inherited BeforeDestruction;
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end;
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procedure TCustomRequestContextHandler.RemoveReferences;
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begin
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FEvents := nil;
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end;
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procedure TCustomRequestContextHandler.OnRequestContextInitialized(const request_context: ICefRequestContext);
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begin
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try
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnRequestContextInitialized(request_context);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomRequestContextHandler.OnRequestContextInitialized', e) then raise;
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end;
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end;
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procedure TCustomRequestContextHandler.GetResourceRequestHandler(const browser : ICefBrowser;
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const frame : ICefFrame;
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const request : ICefRequest;
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is_navigation : boolean;
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is_download : boolean;
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const request_initiator : ustring;
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var disable_default_handling : boolean;
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var aResourceRequestHandler : ICefResourceRequestHandler);
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begin
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try
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doGetResourceRequestHandler_ReqCtxHdlr(browser,
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frame,
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request,
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is_navigation,
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is_download,
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request_initiator,
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disable_default_handling,
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aResourceRequestHandler);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomRequestContextHandler.GetResourceRequestHandler', e) then raise;
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end;
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end;
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end.
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