mirror of
https://github.com/salvadordf/CEF4Delphi.git
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344 lines
13 KiB
ObjectPascal
344 lines
13 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 © 2023 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 uCEFLoadHandler;
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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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uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes, uCEFApplicationCore;
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type
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TCefLoadHandlerOwn = class(TCefBaseRefCountedOwn, ICefLoadHandler)
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protected
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procedure OnLoadingStateChange(const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean); virtual;
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procedure OnLoadStart(const browser: ICefBrowser; const frame: ICefFrame; transitionType: TCefTransitionType); virtual;
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procedure OnLoadEnd(const browser: ICefBrowser; const frame: ICefFrame; httpStatusCode: Integer); virtual;
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procedure OnLoadError(const browser: ICefBrowser; const frame: ICefFrame; errorCode: TCefErrorCode; const errorText, failedUrl: ustring); 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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TCustomLoadHandler = class(TCefLoadHandlerOwn)
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protected
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FEvents : Pointer;
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procedure OnLoadingStateChange(const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean); override;
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procedure OnLoadStart(const browser: ICefBrowser; const frame: ICefFrame; transitionType: TCefTransitionType); override;
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procedure OnLoadEnd(const browser: ICefBrowser; const frame: ICefFrame; httpStatusCode: Integer); override;
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procedure OnLoadError(const browser: ICefBrowser; const frame: ICefFrame; errorCode: TCefErrorCode; const errorText, failedUrl: ustring); override;
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procedure RemoveReferences; override;
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public
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constructor Create(const events : IChromiumEvents); reintroduce; virtual;
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destructor Destroy; override;
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end;
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TCustomRenderLoadHandler = class(TCefLoadHandlerOwn)
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protected
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FCefApp : TCefApplicationCore;
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procedure OnLoadingStateChange(const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean); override;
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procedure OnLoadStart(const browser: ICefBrowser; const frame: ICefFrame; transitionType: TCefTransitionType); override;
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procedure OnLoadEnd(const browser: ICefBrowser; const frame: ICefFrame; httpStatusCode: Integer); override;
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procedure OnLoadError(const browser: ICefBrowser; const frame: ICefFrame; errorCode: TCefErrorCode; const errorText, failedUrl: ustring); override;
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procedure RemoveReferences; override;
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public
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constructor Create(const aCefApp : TCefApplicationCore); reintroduce; virtual;
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destructor Destroy; override;
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end;
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implementation
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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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uCEFMiscFunctions, uCEFLibFunctions, uCEFBrowser, uCEFFrame;
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procedure cef_load_handler_on_loading_state_change(self : PCefLoadHandler;
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browser : PCefBrowser;
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isLoading : integer;
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canGoBack : integer;
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canGoForward : Integer); 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 TCefLoadHandlerOwn) then
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TCefLoadHandlerOwn(TempObject).OnLoadingStateChange(TCefBrowserRef.UnWrap(browser),
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isLoading <> 0,
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canGoBack <> 0,
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canGoForward <> 0);
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end;
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procedure cef_load_handler_on_load_start(self : PCefLoadHandler;
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browser : PCefBrowser;
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frame : PCefFrame;
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transition_type : TCefTransitionType); 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 TCefLoadHandlerOwn) then
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TCefLoadHandlerOwn(TempObject).OnLoadStart(TCefBrowserRef.UnWrap(browser),
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TCefFrameRef.UnWrap(frame),
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transition_type);
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end;
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procedure cef_load_handler_on_load_end(self : PCefLoadHandler;
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browser : PCefBrowser;
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frame : PCefFrame;
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httpStatusCode : Integer); 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 TCefLoadHandlerOwn) then
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TCefLoadHandlerOwn(TempObject).OnLoadEnd(TCefBrowserRef.UnWrap(browser),
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TCefFrameRef.UnWrap(frame),
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httpStatusCode);
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end;
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procedure cef_load_handler_on_load_error( self : PCefLoadHandler;
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browser : PCefBrowser;
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frame : PCefFrame;
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errorCode : TCefErrorCode;
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const errorText : PCefString;
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const failedUrl : PCefString); 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 TCefLoadHandlerOwn) then
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TCefLoadHandlerOwn(TempObject).OnLoadError(TCefBrowserRef.UnWrap(browser),
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TCefFrameRef.UnWrap(frame),
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errorCode,
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CefString(errorText),
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CefString(failedUrl));
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end;
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constructor TCefLoadHandlerOwn.Create;
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begin
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inherited CreateData(SizeOf(TCefLoadHandler));
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with PCefLoadHandler(FData)^ do
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begin
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on_loading_state_change := {$IFDEF FPC}@{$ENDIF}cef_load_handler_on_loading_state_change;
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on_load_start := {$IFDEF FPC}@{$ENDIF}cef_load_handler_on_load_start;
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on_load_end := {$IFDEF FPC}@{$ENDIF}cef_load_handler_on_load_end;
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on_load_error := {$IFDEF FPC}@{$ENDIF}cef_load_handler_on_load_error;
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end;
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end;
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procedure TCefLoadHandlerOwn.OnLoadEnd(const browser: ICefBrowser; const frame: ICefFrame; httpStatusCode: Integer);
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begin
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//
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end;
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procedure TCefLoadHandlerOwn.OnLoadError(const browser: ICefBrowser; const frame: ICefFrame; errorCode: TCefErrorCode; const errorText, failedUrl: ustring);
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begin
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//
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end;
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procedure TCefLoadHandlerOwn.OnLoadingStateChange(const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean);
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begin
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//
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end;
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procedure TCefLoadHandlerOwn.OnLoadStart(const browser: ICefBrowser; const frame: ICefFrame; transitionType: TCefTransitionType);
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begin
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//
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end;
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procedure TCefLoadHandlerOwn.RemoveReferences;
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begin
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//
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end;
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// TCustomLoadHandler
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constructor TCustomLoadHandler.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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destructor TCustomLoadHandler.Destroy;
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begin
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RemoveReferences;
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inherited Destroy;
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end;
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procedure TCustomLoadHandler.RemoveReferences;
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begin
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FEvents := nil;
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end;
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procedure TCustomLoadHandler.OnLoadEnd(const browser : ICefBrowser;
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const frame : ICefFrame;
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httpStatusCode : Integer);
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begin
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if (FEvents <> nil) then IChromiumEvents(FEvents).doOnLoadEnd(browser, frame, httpStatusCode);
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end;
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procedure TCustomLoadHandler.OnLoadError(const browser : ICefBrowser;
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const frame : ICefFrame;
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errorCode : TCefErrorCode;
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const errorText : ustring;
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const failedUrl : ustring);
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begin
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if (FEvents <> nil) then IChromiumEvents(FEvents).doOnLoadError(browser, frame, errorCode, errorText, failedUrl);
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end;
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procedure TCustomLoadHandler.OnLoadingStateChange(const browser : ICefBrowser;
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isLoading : Boolean;
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canGoBack : Boolean;
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canGoForward : Boolean);
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begin
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if (FEvents <> nil) then IChromiumEvents(FEvents).doOnLoadingStateChange(browser, isLoading, canGoBack, canGoForward);
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end;
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procedure TCustomLoadHandler.OnLoadStart(const browser : ICefBrowser;
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const frame : ICefFrame;
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transitionType : TCefTransitionType);
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begin
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if (FEvents <> nil) then IChromiumEvents(FEvents).doOnLoadStart(browser, frame, transitionType);
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end;
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// TCustomRenderLoadHandler
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constructor TCustomRenderLoadHandler.Create(const aCefApp : TCefApplicationCore);
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begin
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inherited Create;
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FCefApp := aCefApp;
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end;
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destructor TCustomRenderLoadHandler.Destroy;
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begin
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RemoveReferences;
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inherited Destroy;
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end;
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procedure TCustomRenderLoadHandler.RemoveReferences;
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begin
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FCefApp := nil;
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end;
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procedure TCustomRenderLoadHandler.OnLoadingStateChange(const browser : ICefBrowser;
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isLoading : Boolean;
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canGoBack : Boolean;
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canGoForward : Boolean);
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begin
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try
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if (FCefApp <> nil) then
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IApplicationCoreEvents(FCefApp).doOnLoadingStateChange(browser, isLoading, canGoBack, canGoForward);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomRenderLoadHandler.OnLoadingStateChange', e) then raise;
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end;
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end;
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procedure TCustomRenderLoadHandler.OnLoadStart(const browser : ICefBrowser;
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const frame : ICefFrame;
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transitionType : TCefTransitionType);
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begin
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try
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if (FCefApp <> nil) then
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IApplicationCoreEvents(FCefApp).doOnLoadStart(browser, frame, transitionType);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomRenderLoadHandler.OnLoadStart', e) then raise;
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end;
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end;
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procedure TCustomRenderLoadHandler.OnLoadEnd(const browser : ICefBrowser;
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const frame : ICefFrame;
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httpStatusCode : Integer);
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begin
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try
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if (FCefApp <> nil) then
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IApplicationCoreEvents(FCefApp).doOnLoadEnd(browser, frame, httpStatusCode);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomRenderLoadHandler.OnLoadEnd', e) then raise;
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end;
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end;
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procedure TCustomRenderLoadHandler.OnLoadError(const browser : ICefBrowser;
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const frame : ICefFrame;
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errorCode : TCefErrorCode;
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const errorText : ustring;
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const failedUrl : ustring);
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begin
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try
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if (FCefApp <> nil) then
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IApplicationCoreEvents(FCefApp).doOnLoadError(browser, frame, errorCode, errorText, failedUrl);
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except
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on e : exception do
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if CustomExceptionHandler('TCustomRenderLoadHandler.OnLoadError', e) then raise;
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end;
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end;
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end.
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