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CEF4Delphi/demos/ExternalPumpBrowser/uExternalPumpBrowser.pas
Salvador Díaz Fau bf402109bf Added GlobalCEFApp.DisablePDFExtension property
- Bug fix #89
- New SimpleLazOSRBrowser demo
2018-06-17 14:18:11 +02:00

240 lines
8.0 KiB
ObjectPascal

// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF3 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 © 2018 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 uExternalPumpBrowser;
{$I cef.inc}
interface
uses
{$IFDEF DELPHI16_UP}
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ExtCtrls,
{$ELSE}
Windows, Messages, SysUtils, Variants, Classes, Graphics,
Controls, Forms, Dialogs, StdCtrls, ExtCtrls,
{$ENDIF}
uCEFChromium, uCEFWindowParent, uCEFTypes, uCEFConstants, uCEFInterfaces, uCEFWorkScheduler;
type
TExternalPumpBrowserFrm = class(TForm)
AddressPnl: TPanel;
GoBtn: TButton;
Timer1: TTimer;
CEFWindowParent1: TCEFWindowParent;
Chromium1: TChromium;
URLCbx: TComboBox;
procedure GoBtnClick(Sender: TObject);
procedure FormShow(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
procedure Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
procedure Chromium1Close(Sender: TObject; const browser: ICefBrowser; out Result: Boolean);
procedure Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
procedure Chromium1BeforePopup(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame; const targetUrl,
targetFrameName: ustring;
targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean;
const popupFeatures: TCefPopupFeatures; var windowInfo: TCefWindowInfo;
var client: ICefClient; var settings: TCefBrowserSettings;
var noJavascriptAccess: Boolean; var Result: Boolean);
private
FCanClose : boolean;
FClosing : boolean;
procedure BrowserCreatedMsg(var aMessage : TMessage); message CEF_AFTERCREATED;
procedure BrowserDestroyMsg(var aMessage : TMessage); message CEF_DESTROY;
procedure WMMove(var aMessage : TWMMove); message WM_MOVE;
procedure WMMoving(var aMessage : TMessage); message WM_MOVING;
procedure WMEnterMenuLoop(var aMessage: TMessage); message WM_ENTERMENULOOP;
procedure WMExitMenuLoop(var aMessage: TMessage); message WM_EXITMENULOOP;
public
end;
var
ExternalPumpBrowserFrm : TExternalPumpBrowserFrm;
procedure CreateGlobalCEFApp;
implementation
{$R *.dfm}
uses
uCEFApplication;
// This demo has a simple browser with a TChromium + TCEFWindowParent combination
// It was necessary to destroy the browser following the destruction sequence described in the MDIBrowser demo.
procedure GlobalCEFApp_OnScheduleMessagePumpWork(const aDelayMS : int64);
begin
if (GlobalCEFWorkScheduler <> nil) then GlobalCEFWorkScheduler.ScheduleMessagePumpWork(aDelayMS);
end;
procedure CreateGlobalCEFApp;
begin
// TCEFWorkScheduler will call cef_do_message_loop_work when
// it's told in the GlobalCEFApp.OnScheduleMessagePumpWork event.
// GlobalCEFWorkScheduler needs to be created before the
// GlobalCEFApp.StartMainProcess call.
GlobalCEFWorkScheduler := TCEFWorkScheduler.Create(nil);
GlobalCEFApp := TCefApplication.Create;
GlobalCEFApp.FlashEnabled := False;
GlobalCEFApp.ExternalMessagePump := True;
GlobalCEFApp.MultiThreadedMessageLoop := False;
GlobalCEFApp.OnScheduleMessagePumpWork := GlobalCEFApp_OnScheduleMessagePumpWork;
end;
procedure TExternalPumpBrowserFrm.FormCreate(Sender: TObject);
begin
FCanClose := False;
FClosing := False;
end;
procedure TExternalPumpBrowserFrm.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
CanClose := FCanClose;
if not(FClosing) then
begin
FClosing := True;
Visible := False;
AddressPnl.Enabled := False;
Chromium1.CloseBrowser(True);
end;
end;
procedure TExternalPumpBrowserFrm.FormShow(Sender: TObject);
begin
// GlobalCEFApp.GlobalContextInitialized has to be TRUE before creating any browser
// If it's not initialized yet, we use a simple timer to create the browser later.
if not(Chromium1.CreateBrowser(CEFWindowParent1, '')) then Timer1.Enabled := True;
end;
procedure TExternalPumpBrowserFrm.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
begin
PostMessage(Handle, CEF_AFTERCREATED, 0, 0);
end;
procedure TExternalPumpBrowserFrm.Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
begin
FCanClose := True;
PostMessage(Handle, WM_CLOSE, 0, 0);
end;
procedure TExternalPumpBrowserFrm.Chromium1BeforePopup(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame; const targetUrl,
targetFrameName: ustring; targetDisposition: TCefWindowOpenDisposition;
userGesture: Boolean; const popupFeatures: TCefPopupFeatures;
var windowInfo: TCefWindowInfo; var client: ICefClient;
var settings: TCefBrowserSettings; var noJavascriptAccess: Boolean;
var Result: Boolean);
begin
// For simplicity, this demo blocks all popup windows and new tabs
Result := (targetDisposition in [WOD_NEW_FOREGROUND_TAB, WOD_NEW_BACKGROUND_TAB, WOD_NEW_POPUP, WOD_NEW_WINDOW]);
end;
procedure TExternalPumpBrowserFrm.Chromium1Close(Sender: TObject; const browser: ICefBrowser; out Result: Boolean);
begin
PostMessage(Handle, CEF_DESTROY, 0, 0);
Result := True;
end;
procedure TExternalPumpBrowserFrm.BrowserCreatedMsg(var aMessage : TMessage);
begin
Caption := 'External Pump Browser';
CEFWindowParent1.UpdateSize;
AddressPnl.Enabled := True;
GoBtn.Click;
end;
procedure TExternalPumpBrowserFrm.BrowserDestroyMsg(var aMessage : TMessage);
begin
CEFWindowParent1.Free;
end;
procedure TExternalPumpBrowserFrm.GoBtnClick(Sender: TObject);
begin
Chromium1.LoadURL(URLCbx.Text);
end;
procedure TExternalPumpBrowserFrm.Timer1Timer(Sender: TObject);
begin
Timer1.Enabled := False;
if not(Chromium1.CreateBrowser(CEFWindowParent1, '')) and not(Chromium1.Initialized) then
Timer1.Enabled := True;
end;
procedure TExternalPumpBrowserFrm.WMMove(var aMessage : TWMMove);
begin
inherited;
if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
end;
procedure TExternalPumpBrowserFrm.WMMoving(var aMessage : TMessage);
begin
inherited;
if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
end;
procedure TExternalPumpBrowserFrm.WMEnterMenuLoop(var aMessage: TMessage);
begin
inherited;
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := True;
end;
procedure TExternalPumpBrowserFrm.WMExitMenuLoop(var aMessage: TMessage);
begin
inherited;
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := False;
end;
end.