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mirror of https://github.com/salvadordf/CEF4Delphi.git synced 2024-12-14 09:42:54 +02:00
CEF4Delphi/source/uCEFLoadHandler.pas
2021-01-01 11:11:30 +01:00

341 lines
13 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 © 2021 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 uCEFLoadHandler;
{$IFDEF FPC}
{$MODE OBJFPC}{$H+}
{$ENDIF}
{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}
{$I cef.inc}
interface
uses
uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes, uCEFApplicationCore;
type
TCefLoadHandlerOwn = class(TCefBaseRefCountedOwn, ICefLoadHandler)
protected
procedure OnLoadingStateChange(const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean); virtual;
procedure OnLoadStart(const browser: ICefBrowser; const frame: ICefFrame; transitionType: TCefTransitionType); virtual;
procedure OnLoadEnd(const browser: ICefBrowser; const frame: ICefFrame; httpStatusCode: Integer); virtual;
procedure OnLoadError(const browser: ICefBrowser; const frame: ICefFrame; errorCode: TCefErrorCode; const errorText, failedUrl: ustring); virtual;
procedure RemoveReferences; virtual;
public
constructor Create; virtual;
end;
TCustomLoadHandler = class(TCefLoadHandlerOwn)
protected
FEvents : Pointer;
procedure OnLoadingStateChange(const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean); override;
procedure OnLoadStart(const browser: ICefBrowser; const frame: ICefFrame; transitionType: TCefTransitionType); override;
procedure OnLoadEnd(const browser: ICefBrowser; const frame: ICefFrame; httpStatusCode: Integer); override;
procedure OnLoadError(const browser: ICefBrowser; const frame: ICefFrame; errorCode: TCefErrorCode; const errorText, failedUrl: ustring); override;
procedure RemoveReferences; override;
public
constructor Create(const events : IChromiumEvents); reintroduce; virtual;
destructor Destroy; override;
end;
TCustomRenderLoadHandler = class(TCefLoadHandlerOwn)
protected
FCefApp : TCefApplicationCore;
procedure OnLoadingStateChange(const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean); override;
procedure OnLoadStart(const browser: ICefBrowser; const frame: ICefFrame; transitionType: TCefTransitionType); override;
procedure OnLoadEnd(const browser: ICefBrowser; const frame: ICefFrame; httpStatusCode: Integer); override;
procedure OnLoadError(const browser: ICefBrowser; const frame: ICefFrame; errorCode: TCefErrorCode; const errorText, failedUrl: ustring); override;
procedure RemoveReferences; override;
public
constructor Create(const aCefApp : TCefApplicationCore); reintroduce; virtual;
destructor Destroy; override;
end;
implementation
uses
{$IFDEF DELPHI16_UP}
System.SysUtils,
{$ELSE}
SysUtils,
{$ENDIF}
uCEFMiscFunctions, uCEFLibFunctions, uCEFBrowser, uCEFFrame;
procedure cef_load_handler_on_loading_state_change(self : PCefLoadHandler;
browser : PCefBrowser;
isLoading : integer;
canGoBack : integer;
canGoForward : Integer); stdcall;
var
TempObject : TObject;
begin
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefLoadHandlerOwn) then
TCefLoadHandlerOwn(TempObject).OnLoadingStateChange(TCefBrowserRef.UnWrap(browser),
isLoading <> 0,
canGoBack <> 0,
canGoForward <> 0);
end;
procedure cef_load_handler_on_load_start(self : PCefLoadHandler;
browser : PCefBrowser;
frame : PCefFrame;
transition_type : TCefTransitionType); stdcall;
var
TempObject : TObject;
begin
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefLoadHandlerOwn) then
TCefLoadHandlerOwn(TempObject).OnLoadStart(TCefBrowserRef.UnWrap(browser),
TCefFrameRef.UnWrap(frame),
transition_type);
end;
procedure cef_load_handler_on_load_end(self : PCefLoadHandler;
browser : PCefBrowser;
frame : PCefFrame;
httpStatusCode : Integer); stdcall;
var
TempObject : TObject;
begin
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefLoadHandlerOwn) then
TCefLoadHandlerOwn(TempObject).OnLoadEnd(TCefBrowserRef.UnWrap(browser),
TCefFrameRef.UnWrap(frame),
httpStatusCode);
end;
procedure cef_load_handler_on_load_error( self : PCefLoadHandler;
browser : PCefBrowser;
frame : PCefFrame;
errorCode : TCefErrorCode;
const errorText : PCefString;
const failedUrl : PCefString); stdcall;
var
TempObject : TObject;
begin
TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefLoadHandlerOwn) then
TCefLoadHandlerOwn(TempObject).OnLoadError(TCefBrowserRef.UnWrap(browser),
TCefFrameRef.UnWrap(frame),
errorCode,
CefString(errorText),
CefString(failedUrl));
end;
constructor TCefLoadHandlerOwn.Create;
begin
inherited CreateData(SizeOf(TCefLoadHandler));
with PCefLoadHandler(FData)^ do
begin
on_loading_state_change := {$IFDEF FPC}@{$ENDIF}cef_load_handler_on_loading_state_change;
on_load_start := {$IFDEF FPC}@{$ENDIF}cef_load_handler_on_load_start;
on_load_end := {$IFDEF FPC}@{$ENDIF}cef_load_handler_on_load_end;
on_load_error := {$IFDEF FPC}@{$ENDIF}cef_load_handler_on_load_error;
end;
end;
procedure TCefLoadHandlerOwn.OnLoadEnd(const browser: ICefBrowser; const frame: ICefFrame; httpStatusCode: Integer);
begin
//
end;
procedure TCefLoadHandlerOwn.OnLoadError(const browser: ICefBrowser; const frame: ICefFrame; errorCode: TCefErrorCode; const errorText, failedUrl: ustring);
begin
//
end;
procedure TCefLoadHandlerOwn.OnLoadingStateChange(const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean);
begin
//
end;
procedure TCefLoadHandlerOwn.OnLoadStart(const browser: ICefBrowser; const frame: ICefFrame; transitionType: TCefTransitionType);
begin
//
end;
procedure TCefLoadHandlerOwn.RemoveReferences;
begin
//
end;
// TCustomLoadHandler
constructor TCustomLoadHandler.Create(const events : IChromiumEvents);
begin
inherited Create;
FEvents := Pointer(events);
end;
destructor TCustomLoadHandler.Destroy;
begin
RemoveReferences;
inherited Destroy;
end;
procedure TCustomLoadHandler.RemoveReferences;
begin
FEvents := nil;
end;
procedure TCustomLoadHandler.OnLoadEnd(const browser : ICefBrowser;
const frame : ICefFrame;
httpStatusCode : Integer);
begin
if (FEvents <> nil) then IChromiumEvents(FEvents).doOnLoadEnd(browser, frame, httpStatusCode);
end;
procedure TCustomLoadHandler.OnLoadError(const browser : ICefBrowser;
const frame : ICefFrame;
errorCode : TCefErrorCode;
const errorText : ustring;
const failedUrl : ustring);
begin
if (FEvents <> nil) then IChromiumEvents(FEvents).doOnLoadError(browser, frame, errorCode, errorText, failedUrl);
end;
procedure TCustomLoadHandler.OnLoadingStateChange(const browser : ICefBrowser;
isLoading : Boolean;
canGoBack : Boolean;
canGoForward : Boolean);
begin
if (FEvents <> nil) then IChromiumEvents(FEvents).doOnLoadingStateChange(browser, isLoading, canGoBack, canGoForward);
end;
procedure TCustomLoadHandler.OnLoadStart(const browser : ICefBrowser;
const frame : ICefFrame;
transitionType : TCefTransitionType);
begin
if (FEvents <> nil) then IChromiumEvents(FEvents).doOnLoadStart(browser, frame, transitionType);
end;
// TCustomRenderLoadHandler
constructor TCustomRenderLoadHandler.Create(const aCefApp : TCefApplicationCore);
begin
inherited Create;
FCefApp := aCefApp;
end;
destructor TCustomRenderLoadHandler.Destroy;
begin
RemoveReferences;
inherited Destroy;
end;
procedure TCustomRenderLoadHandler.RemoveReferences;
begin
FCefApp := nil;
end;
procedure TCustomRenderLoadHandler.OnLoadEnd(const browser : ICefBrowser;
const frame : ICefFrame;
httpStatusCode : Integer);
begin
try
if (FCefApp <> nil) then FCefApp.Internal_OnLoadEnd(browser, frame, httpStatusCode);
except
on e : exception do
if CustomExceptionHandler('TCustomRenderLoadHandler.OnLoadEnd', e) then raise;
end;
end;
procedure TCustomRenderLoadHandler.OnLoadError(const browser : ICefBrowser;
const frame : ICefFrame;
errorCode : TCefErrorCode;
const errorText : ustring;
const failedUrl : ustring);
begin
try
if (FCefApp <> nil) then FCefApp.Internal_OnLoadError(browser, frame, errorCode, errorText, failedUrl);
except
on e : exception do
if CustomExceptionHandler('TCustomRenderLoadHandler.OnLoadError', e) then raise;
end;
end;
procedure TCustomRenderLoadHandler.OnLoadingStateChange(const browser : ICefBrowser;
isLoading : Boolean;
canGoBack : Boolean;
canGoForward : Boolean);
begin
try
if (FCefApp <> nil) then FCefApp.Internal_OnLoadingStateChange(browser, isLoading, canGoBack, canGoForward);
except
on e : exception do
if CustomExceptionHandler('TCustomRenderLoadHandler.OnLoadingStateChange', e) then raise;
end;
end;
procedure TCustomRenderLoadHandler.OnLoadStart(const browser : ICefBrowser;
const frame : ICefFrame;
transitionType : TCefTransitionType);
begin
try
if (FCefApp <> nil) then FCefApp.Internal_OnLoadStart(browser, frame, transitionType);
except
on e : exception do
if CustomExceptionHandler('TCustomRenderLoadHandler.OnLoadStart', e) then raise;
end;
end;
end.