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CEF4Delphi/demos/SimpleExternalPumpBrowser/uSimpleExternalPumpBrowser.pas
Salvador Díaz Fau 769aa4f384 Fixed IME support in OSR mode
- Added lots of conditional compiler directives to build CEF4DElphi in Linux using Lazarus/FPC
- Updated copyright year
2019-01-08 19:15:25 +01:00

230 lines
8.3 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 © 2019 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 uSimpleExternalPumpBrowser;
{$I cef.inc}
interface
uses
{$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,
uCEFChromiumWindow, Vcl.ComCtrls, Vcl.AppEvnts;
type
TSimpleExternalPumpBrowserFrm = class(TForm)
AddressPnl: TPanel;
GoBtn: TButton;
Timer1: TTimer;
URLCbx: TComboBox;
ChromiumWindow1: TChromiumWindow;
procedure GoBtnClick(Sender: TObject);
procedure FormShow(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
// These 3 TChromiumWindow events are called in the main app thread, so you can do whatever you want with the GUI.
procedure ChromiumWindow1AfterCreated(Sender: TObject);
procedure ChromiumWindow1BeforeClose(Sender: TObject);
procedure ChromiumWindow1Close(Sender: TObject);
procedure Chromium_OnBeforePopup(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);
protected
FCanClose : boolean;
FClosing : boolean;
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;
end;
var
SimpleExternalPumpBrowserFrm : TSimpleExternalPumpBrowserFrm;
procedure CreateGlobalCEFApp;
implementation
{$R *.dfm}
uses
uCEFApplication;
// This demo has a simple browser with a TChromiumWindow using the "External message pump" mode
// to schedule the cef_do_message_loop_work calls thanks to the TCEFWorkScheduler class.
// It was necessary to destroy the browser with the following destruction sequence :
// 1. The FormCloseQuery event sets CanClose to False and calls TChromiumWindow.CloseBrowser, which triggers the TChromiumWindow.OnClose event.
// 2. The TChromiumWindow.OnClose event calls TChromiumWindow.DestroyChildWindow which triggers the TChromiumWindow.OnBeforeClose event.
// 3. TChromiumWindow.OnBeforeClose sets FCanClose to True and closes the form.
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.ExternalMessagePump := True;
GlobalCEFApp.MultiThreadedMessageLoop := False;
GlobalCEFApp.OnScheduleMessagePumpWork := GlobalCEFApp_OnScheduleMessagePumpWork;
end;
procedure TSimpleExternalPumpBrowserFrm.FormCreate(Sender: TObject);
begin
FCanClose := False;
FClosing := False;
end;
procedure TSimpleExternalPumpBrowserFrm.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
CanClose := FCanClose;
if not(FClosing) then
begin
FClosing := True;
Visible := False;
AddressPnl.Enabled := False;
ChromiumWindow1.CloseBrowser(True);
end;
end;
procedure TSimpleExternalPumpBrowserFrm.FormShow(Sender: TObject);
begin
// For simplicity, this demo blocks all popup windows and new tabs
ChromiumWindow1.ChromiumBrowser.OnBeforePopup := Chromium_OnBeforePopup;
// 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(ChromiumWindow1.CreateBrowser) then Timer1.Enabled := True;
end;
procedure TSimpleExternalPumpBrowserFrm.Chromium_OnBeforePopup(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 TSimpleExternalPumpBrowserFrm.ChromiumWindow1AfterCreated(Sender: TObject);
begin
Caption := 'Simple External Pump Browser';
AddressPnl.Enabled := True;
GoBtn.Click;
end;
procedure TSimpleExternalPumpBrowserFrm.ChromiumWindow1BeforeClose(Sender: TObject);
begin
FCanClose := True;
Close;
end;
procedure TSimpleExternalPumpBrowserFrm.ChromiumWindow1Close(Sender: TObject);
begin
// DestroyChildWindow will destroy the child window created by CEF at the top of the Z order.
if not(ChromiumWindow1.DestroyChildWindow) then
begin
FCanClose := True;
Close;
end;
end;
procedure TSimpleExternalPumpBrowserFrm.GoBtnClick(Sender: TObject);
begin
ChromiumWindow1.LoadURL(URLCbx.Text);
end;
procedure TSimpleExternalPumpBrowserFrm.Timer1Timer(Sender: TObject);
begin
Timer1.Enabled := False;
if not(ChromiumWindow1.CreateBrowser) and not(ChromiumWindow1.Initialized) then
Timer1.Enabled := True;
end;
procedure TSimpleExternalPumpBrowserFrm.WMMove(var aMessage : TWMMove);
begin
inherited;
if (ChromiumWindow1 <> nil) then ChromiumWindow1.NotifyMoveOrResizeStarted;
end;
procedure TSimpleExternalPumpBrowserFrm.WMMoving(var aMessage : TMessage);
begin
inherited;
if (ChromiumWindow1 <> nil) then ChromiumWindow1.NotifyMoveOrResizeStarted;
end;
procedure TSimpleExternalPumpBrowserFrm.WMEnterMenuLoop(var aMessage: TMessage);
begin
inherited;
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := True;
end;
procedure TSimpleExternalPumpBrowserFrm.WMExitMenuLoop(var aMessage: TMessage);
begin
inherited;
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := False;
end;
end.