mirror of
https://github.com/salvadordf/CEF4Delphi.git
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300 lines
11 KiB
ObjectPascal
300 lines
11 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 uCEFPrintHandler;
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{$IFDEF FPC}
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{$MODE OBJFPC}{$H+}
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{$ENDIF}
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{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
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{$MINENUMSIZE 4}
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{$I cef.inc}
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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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TCefPrintHandlerOwn = class(TCefBaseRefCountedOwn, ICefPrintHandler)
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protected
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procedure OnPrintStart(const browser: ICefBrowser); virtual; abstract;
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procedure OnPrintSettings(const browser: ICefBrowser; const settings: ICefPrintSettings; getDefaults: boolean); virtual; abstract;
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procedure OnPrintDialog(const browser: ICefBrowser; hasSelection: boolean; const callback: ICefPrintDialogCallback; var aResult: boolean); virtual;
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procedure OnPrintJob(const browser: ICefBrowser; const documentName, PDFFilePath: ustring; const callback: ICefPrintJobCallback; var aResult: boolean); virtual;
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procedure OnPrintReset(const browser: ICefBrowser); virtual; abstract;
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procedure GetPDFPaperSize(const browser: ICefBrowser; deviceUnitsPerInch: Integer; var aResult: TCefSize); virtual;
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procedure RemoveReferences; virtual; abstract;
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public
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constructor Create; virtual;
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end;
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TCustomPrintHandler = class(TCefPrintHandlerOwn)
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protected
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FEvents : Pointer;
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procedure OnPrintStart(const browser: ICefBrowser); override;
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procedure OnPrintSettings(const browser: ICefBrowser; const settings: ICefPrintSettings; getDefaults: boolean); override;
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procedure OnPrintDialog(const browser: ICefBrowser; hasSelection: boolean; const callback: ICefPrintDialogCallback; var aResult: boolean); override;
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procedure OnPrintJob(const browser: ICefBrowser; const documentName, PDFFilePath: ustring; const callback: ICefPrintJobCallback; var aResult: boolean); override;
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procedure OnPrintReset(const browser: ICefBrowser); override;
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procedure GetPDFPaperSize(const browser: ICefBrowser; deviceUnitsPerInch: Integer; var aResult: TCefSize); 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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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, uCEFPrintSettings,
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uCEFPrintDialogCallback, uCEFPrintJobCallback;
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// TCefPrintHandlerOwn
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procedure cef_print_handler_on_print_start(self: PCefPrintHandler; browser: PCefBrowser); 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 TCefPrintHandlerOwn) then
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TCefPrintHandlerOwn(TempObject).OnPrintStart(TCefBrowserRef.UnWrap(browser));
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end;
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procedure cef_print_handler_on_print_settings(self : PCefPrintHandler;
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browser : PCefBrowser;
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settings : PCefPrintSettings;
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get_defaults : 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 TCefPrintHandlerOwn) then
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TCefPrintHandlerOwn(TempObject).OnPrintSettings(TCefBrowserRef.UnWrap(browser),
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TCefPrintSettingsRef.UnWrap(settings),
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get_defaults <> 0);
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end;
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function cef_print_handler_on_print_dialog(self : PCefPrintHandler;
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browser : PCefBrowser;
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has_selection : Integer;
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callback : PCefPrintDialogCallback): Integer; stdcall;
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var
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TempObject : TObject;
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TempResult : boolean;
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begin
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TempResult := False;
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefPrintHandlerOwn) then
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TCefPrintHandlerOwn(TempObject).OnPrintDialog(TCefBrowserRef.UnWrap(browser),
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has_selection <> 0,
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TCefPrintDialogCallbackRef.UnWrap(callback),
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TempResult);
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Result := ord(TempResult);
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end;
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function cef_print_handler_on_print_job( self : PCefPrintHandler;
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browser : PCefBrowser;
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const document_name : PCefString;
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const pdf_file_path : PCefString;
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callback : PCefPrintJobCallback): Integer; stdcall;
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var
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TempObject : TObject;
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TempResult : boolean;
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begin
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TempResult := False;
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefPrintHandlerOwn) then
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TCefPrintHandlerOwn(TempObject).OnPrintJob(TCefBrowserRef.UnWrap(browser),
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CefString(document_name),
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CefString(pdf_file_path),
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TCefPrintJobCallbackRef.UnWrap(callback),
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TempResult);
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Result := ord(TempResult);
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end;
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procedure cef_print_handler_on_print_reset(self : PCefPrintHandler;
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browser : PCefBrowser); 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 TCefPrintHandlerOwn) then
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TCefPrintHandlerOwn(TempObject).OnPrintReset(TCefBrowserRef.UnWrap(browser));
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end;
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function cef_print_handler_get_pdf_paper_size(self : PCefPrintHandler;
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browser : PCefBrowser;
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device_units_per_inch : Integer): TCefSize; stdcall;
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var
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TempObject : TObject;
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TempSize : TCefSize;
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begin
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TempObject := CefGetObject(self);
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TempSize.Width := 0;
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TempSize.Height := 0;
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if (TempObject <> nil) and (TempObject is TCefPrintHandlerOwn) then
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TCefPrintHandlerOwn(TempObject).GetPDFPaperSize(TCefBrowserRef.UnWrap(browser),
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device_units_per_inch,
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TempSize);
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Result := TempSize;
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end;
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constructor TCefPrintHandlerOwn.Create;
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begin
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inherited CreateData(SizeOf(TCefPrintHandler));
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with PCefPrintHandler(FData)^ do
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begin
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on_print_start := {$IFDEF FPC}@{$ENDIF}cef_print_handler_on_print_start;
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on_print_settings := {$IFDEF FPC}@{$ENDIF}cef_print_handler_on_print_settings;
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on_print_dialog := {$IFDEF FPC}@{$ENDIF}cef_print_handler_on_print_dialog;
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on_print_job := {$IFDEF FPC}@{$ENDIF}cef_print_handler_on_print_job;
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on_print_reset := {$IFDEF FPC}@{$ENDIF}cef_print_handler_on_print_reset;
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get_pdf_paper_size := {$IFDEF FPC}@{$ENDIF}cef_print_handler_get_pdf_paper_size;
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end;
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end;
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procedure TCefPrintHandlerOwn.OnPrintDialog(const browser: ICefBrowser; hasSelection: boolean; const callback: ICefPrintDialogCallback; var aResult: boolean);
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begin
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aResult := False;
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end;
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procedure TCefPrintHandlerOwn.OnPrintJob(const browser: ICefBrowser; const documentName, PDFFilePath: ustring; const callback: ICefPrintJobCallback; var aResult: boolean);
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begin
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aResult := False;
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end;
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procedure TCefPrintHandlerOwn.GetPDFPaperSize(const browser: ICefBrowser; deviceUnitsPerInch: Integer; var aResult: TCefSize);
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begin
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aResult.Width := 0;
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aResult.Height := 0;
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end;
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// TCustomPrintHandler
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constructor TCustomPrintHandler.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 TCustomPrintHandler.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 TCustomPrintHandler.RemoveReferences;
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begin
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FEvents := nil;
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end;
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procedure TCustomPrintHandler.OnPrintStart(const browser : ICefBrowser);
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begin
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnPrintStart(browser);
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end;
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procedure TCustomPrintHandler.OnPrintSettings(const browser : ICefBrowser;
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const settings : ICefPrintSettings;
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getDefaults : boolean);
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begin
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnPrintSettings(browser, settings, getDefaults);
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end;
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procedure TCustomPrintHandler.OnPrintDialog(const browser : ICefBrowser;
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hasSelection : boolean;
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const callback : ICefPrintDialogCallback;
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var aResult : boolean);
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begin
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnPrintDialog(browser, hasSelection, callback, aResult);
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end;
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procedure TCustomPrintHandler.OnPrintJob(const browser : ICefBrowser;
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const documentName : ustring;
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const PDFFilePath : ustring;
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const callback : ICefPrintJobCallback;
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var aResult : boolean);
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begin
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnPrintJob(browser, documentName, PDFFilePath, callback, aResult);
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end;
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procedure TCustomPrintHandler.OnPrintReset(const browser : ICefBrowser);
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begin
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnPrintReset(browser);
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end;
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procedure TCustomPrintHandler.GetPDFPaperSize(const browser : ICefBrowser;
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deviceUnitsPerInch : Integer;
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var aResult : TCefSize);
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begin
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnGetPDFPaperSize(browser, deviceUnitsPerInch, aResult);
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end;
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end.
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