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mirror of https://github.com/salvadordf/CEF4Delphi.git synced 2024-12-04 09:26:52 +02:00
CEF4Delphi/source/uCEFRequestContextHandler.pas
Salvador Díaz Fau fd1e936198 Update to CEF 79.0.10
- Removed CEFSentinel from some demos because it's no longer necessary.
- Updated copyright year.
2020-01-01 12:48:10 +01:00

377 lines
19 KiB
ObjectPascal

// ************************************************************************
// ***************************** 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 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 OnBeforePluginLoad(const mimeType, pluginUrl: ustring; isMainFrame : boolean; const topOriginUrl: ustring; const pluginInfo: ICefWebPluginInfo; var pluginPolicy: TCefPluginPolicy): Boolean;
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);
procedure RemoveReferences; virtual;
public
class function UnWrap(data: Pointer): ICefRequestContextHandler;
end;
TCefRequestContextHandlerOwn = class(TCefBaseRefCountedOwn, ICefRequestContextHandler)
protected
procedure OnRequestContextInitialized(const request_context: ICefRequestContext); virtual;
function OnBeforePluginLoad(const mimeType, pluginUrl: ustring; isMainFrame : boolean; const topOriginUrl: ustring; const pluginInfo: ICefWebPluginInfo; var pluginPolicy: TCefPluginPolicy): Boolean; virtual;
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;
procedure RemoveReferences; virtual;
public
constructor Create; virtual;
end;
TCustomRequestContextHandler = class(TCefRequestContextHandlerOwn)
protected
FEvents : Pointer;
procedure OnRequestContextInitialized(const request_context: ICefRequestContext); override;
function OnBeforePluginLoad(const mimeType, pluginUrl: ustring; isMainFrame : boolean; const topOriginUrl: ustring; const pluginInfo: ICefWebPluginInfo; var pluginPolicy: TCefPluginPolicy): Boolean; override;
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;
public
constructor Create(const events : IChromiumEvents); reintroduce; virtual;
procedure BeforeDestruction; override;
procedure RemoveReferences; override;
end;
implementation
uses
uCEFMiscFunctions, uCEFLibFunctions, uCEFBrowser, uCEFFrame, uCEFRequest,
uCEFWebPluginInfo, uCEFRequestContext, uCEFResourceRequestHandler;
// 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_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;
TempPolicy : TCefPluginPolicy;
begin
Result := Ord(False);
TempObject := CefGetObject(self);
TempPolicy := plugin_policy^;
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),
TempPolicy));
plugin_policy^ := TempPolicy;
end;
function cef_request_context_handler_get_resource_request_handler( self : PCefRequestContextHandler;
browser : PCefBrowser;
frame : PCefFrame;
request : PCefRequest;
is_navigation : Integer;
is_download : Integer;
const request_initiator : PCefString;
disable_default_handling : PInteger): PCefResourceRequestHandler; stdcall;
var
TempObject : TObject;
TempDisableDefHandling : Boolean;
TempResourceRequestHandler : ICefResourceRequestHandler;
begin
Result := nil;
TempResourceRequestHandler := nil;
TempObject := CefGetObject(self);
TempDisableDefHandling := disable_default_handling^ <> 0;
if (TempObject <> nil) and (TempObject is TCefRequestContextHandlerOwn) then
try
TCefRequestContextHandlerOwn(TempObject).GetResourceRequestHandler(TCefBrowserRef.UnWrap(browser),
TCefFrameRef.UnWrap(frame),
TCefRequestRef.UnWrap(request),
is_navigation <> 0,
is_download <> 0,
CefString(request_initiator),
TempDisableDefHandling,
TempResourceRequestHandler);
Result := CefGetData(TempResourceRequestHandler);
disable_default_handling^ := Ord(TempDisableDefHandling);
finally
TempResourceRequestHandler := nil;
end;
end;
constructor TCefRequestContextHandlerOwn.Create;
begin
inherited CreateData(SizeOf(TCefRequestContextHandler));
with PCefRequestContextHandler(FData)^ do
begin
on_request_context_initialized := {$IFDEF FPC}@{$ENDIF}cef_request_context_handler_on_request_context_initialized;
on_before_plugin_load := {$IFDEF FPC}@{$ENDIF}cef_request_context_handler_on_before_plugin_load;
get_resource_request_handler := {$IFDEF FPC}@{$ENDIF}cef_request_context_handler_get_resource_request_handler;
end;
end;
procedure TCefRequestContextHandlerOwn.OnRequestContextInitialized(const request_context: ICefRequestContext);
begin
//
end;
function TCefRequestContextHandlerOwn.OnBeforePluginLoad(const mimeType : ustring;
const pluginUrl : ustring;
isMainFrame : boolean;
const topOriginUrl : ustring;
const pluginInfo : ICefWebPluginInfo;
var pluginPolicy : TCefPluginPolicy): Boolean;
begin
Result := False;
end;
procedure TCefRequestContextHandlerOwn.GetResourceRequestHandler(const browser : ICefBrowser;
const frame : ICefFrame;
const request : ICefRequest;
is_navigation : boolean;
is_download : boolean;
const request_initiator : ustring;
var disable_default_handling : boolean;
var aResourceRequestHandler : ICefResourceRequestHandler);
begin
aResourceRequestHandler := nil;
end;
procedure TCefRequestContextHandlerOwn.RemoveReferences;
begin
//
end;
// TCefRequestContextHandlerRef
procedure TCefRequestContextHandlerRef.OnRequestContextInitialized(const request_context: ICefRequestContext);
begin
PCefRequestContextHandler(FData)^.on_request_context_initialized(PCefRequestContextHandler(FData), CefGetData(request_context));
end;
function TCefRequestContextHandlerRef.OnBeforePluginLoad(const mimeType : ustring;
const pluginUrl : ustring;
isMainFrame : boolean;
const topOriginUrl : ustring;
const pluginInfo : ICefWebPluginInfo;
var pluginPolicy : TCefPluginPolicy): 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;
procedure TCefRequestContextHandlerRef.GetResourceRequestHandler(const browser : ICefBrowser;
const frame : ICefFrame;
const request : ICefRequest;
is_navigation : boolean;
is_download : boolean;
const request_initiator : ustring;
var disable_default_handling : boolean;
var aResourceRequestHandler : ICefResourceRequestHandler);
var
TempRequestInitiator : TCefString;
TempDisableDefaultHandling : integer;
TempResourceRequestHandler : PCefResourceRequestHandler;
begin
TempRequestInitiator := CefString(request_initiator);
TempDisableDefaultHandling := ord(disable_default_handling);
TempResourceRequestHandler := PCefRequestContextHandler(FData)^.get_resource_request_handler(PCefRequestContextHandler(FData),
CefGetData(browser),
CefGetData(frame),
CefGetData(request),
ord(is_navigation),
ord(is_download),
@TempRequestInitiator,
@TempDisableDefaultHandling);
disable_default_handling := TempDisableDefaultHandling <> 0;
if (TempResourceRequestHandler <> nil) then
aResourceRequestHandler := TCefResourceRequestHandlerRef.UnWrap(TempResourceRequestHandler)
else
aResourceRequestHandler := nil;
end;
procedure TCefRequestContextHandlerRef.RemoveReferences;
begin
//
end;
class function TCefRequestContextHandlerRef.UnWrap(data: Pointer): ICefRequestContextHandler;
begin
if (data <> nil) then
Result := Create(data) as ICefRequestContextHandler
else
Result := nil;
end;
// TCustomRequestContextHandler
constructor TCustomRequestContextHandler.Create(const events : IChromiumEvents);
begin
inherited Create;
FEvents := Pointer(events);
end;
procedure TCustomRequestContextHandler.BeforeDestruction;
begin
FEvents := nil;
inherited BeforeDestruction;
end;
procedure TCustomRequestContextHandler.RemoveReferences;
begin
FEvents := nil;
end;
procedure TCustomRequestContextHandler.OnRequestContextInitialized(const request_context: ICefRequestContext);
begin
if (FEvents <> nil) then
IChromiumEvents(FEvents).doOnRequestContextInitialized(request_context)
else
inherited OnRequestContextInitialized(request_context);
end;
function TCustomRequestContextHandler.OnBeforePluginLoad(const mimeType : ustring;
const pluginUrl : ustring;
isMainFrame : boolean;
const topOriginUrl : ustring;
const pluginInfo : ICefWebPluginInfo;
var pluginPolicy : TCefPluginPolicy): Boolean;
begin
if (FEvents <> nil) then
Result := IChromiumEvents(FEvents).doOnBeforePluginLoad(mimeType,
pluginUrl,
isMainFrame,
topOriginUrl,
pluginInfo,
pluginPolicy)
else
Result := inherited OnBeforePluginLoad(mimeType,
pluginUrl,
isMainFrame,
topOriginUrl,
pluginInfo,
pluginPolicy);
end;
procedure TCustomRequestContextHandler.GetResourceRequestHandler(const browser : ICefBrowser;
const frame : ICefFrame;
const request : ICefRequest;
is_navigation : boolean;
is_download : boolean;
const request_initiator : ustring;
var disable_default_handling : boolean;
var aResourceRequestHandler : ICefResourceRequestHandler);
begin
if (FEvents <> nil) then
IChromiumEvents(FEvents).doGetResourceRequestHandler_ReqCtxHdlr(browser,
frame,
request,
is_navigation,
is_download,
request_initiator,
disable_default_handling,
aResourceRequestHandler)
else
inherited GetResourceRequestHandler(browser,
frame,
request,
is_navigation,
is_download,
request_initiator,
disable_default_handling,
aResourceRequestHandler);
end;
end.