mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-11-16 00:05:55 +01:00
317 lines
11 KiB
ObjectPascal
317 lines
11 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 uExternalPumpBrowser;
|
|
|
|
{$mode objfpc}{$H+}
|
|
{$I cef.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
GlobalCefApplication,
|
|
uCEFLazarusCocoa, // required for Cocoa
|
|
Classes, SysUtils, Messages, Forms, Controls, Graphics,
|
|
Dialogs, ExtCtrls, StdCtrls, LMessages, uCEFChromium, uCEFWindowParent,
|
|
uCEFConstants, uCEFTypes, uCEFInterfaces, uCEFChromiumEvents,
|
|
uCEFLinkedWindowParent, uCEFWorkScheduler;
|
|
|
|
type
|
|
|
|
{ TForm1 }
|
|
|
|
TForm1 = class(TForm)
|
|
AddressEdt: TComboBox;
|
|
CEFLinkedWindowParent1: TCEFLinkedWindowParent;
|
|
GoBtn: TButton;
|
|
Chromium1: TChromium;
|
|
AddressPnl: TPanel;
|
|
Timer1: TTimer;
|
|
|
|
procedure CEFLinkedWindowParent1Enter(Sender: TObject);
|
|
procedure CEFLinkedWindowParent1Exit(Sender: TObject);
|
|
|
|
procedure Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
|
|
procedure Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
|
|
procedure Chromium1Close(Sender: TObject; const browser: ICefBrowser; var aAction: TCefCloseBrowserAction);
|
|
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 extra_info: ICefDictionaryValue; var noJavascriptAccess: Boolean; var Result: Boolean);
|
|
procedure Chromium1GotFocus(Sender: TObject; const browser: ICefBrowser);
|
|
procedure Chromium1OpenUrlFromTab(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const targetUrl: ustring; targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean; out Result: Boolean);
|
|
|
|
procedure FormCreate(Sender: TObject);
|
|
procedure FormActivate(Sender: TObject);
|
|
procedure FormCloseQuery(Sender: TObject; var CanClose: boolean);
|
|
|
|
procedure GoBtnClick(Sender: TObject);
|
|
procedure Timer1Timer(Sender: TObject);
|
|
private
|
|
|
|
protected
|
|
// Variables to control when can we destroy the form safely
|
|
FCanClose : boolean; // Set to True in TChromium.OnBeforeClose
|
|
FClosing : boolean; // Set to True in the CloseQuery event.
|
|
|
|
// CEF needs to handle these messages to call TChromium.NotifyMoveOrResizeStarted
|
|
procedure WMMove(var Message: TLMMove); message LM_MOVE;
|
|
procedure WMSize(var Message: TLMSize); message LM_SIZE;
|
|
procedure WMWindowPosChanged(var Message: TLMWindowPosChanged); message LM_WINDOWPOSCHANGED;
|
|
{$IFDEF WINDOWS}
|
|
procedure WMEnterMenuLoop(var aMessage: TMessage); message WM_ENTERMENULOOP;
|
|
procedure WMExitMenuLoop(var aMessage: TMessage); message WM_EXITMENULOOP;
|
|
{$ENDIF}
|
|
|
|
procedure BrowserCreatedMsg(Data: PtrInt);
|
|
procedure BrowserFocusMsg(Data: PtrInt);
|
|
procedure BrowserBeforeCloseMsg(Data: PtrInt);
|
|
public
|
|
|
|
end;
|
|
|
|
var
|
|
Form1: TForm1;
|
|
|
|
|
|
implementation
|
|
|
|
{$R *.lfm}
|
|
|
|
// This is a demo with the simplest web browser you can build using CEF4Delphi and
|
|
// it doesn't show any sign of progress like other web browsers do.
|
|
|
|
// Remember that it may take a few seconds to load if Windows update, your antivirus or
|
|
// any other windows service is using your hard drive.
|
|
|
|
// Depending on your internet connection it may take longer than expected.
|
|
|
|
// Please check that your firewall or antivirus are not blocking this application
|
|
// or the domain "google.com". If you don't live in the US, you'll be redirected to
|
|
// another domain which will take a little time too.
|
|
|
|
// This demo uses a TChromium and a TCEFLinkedWindowParent
|
|
|
|
// We need to use TCEFLinkedWindowParent in Linux to update the browser
|
|
// visibility and size automatically.
|
|
|
|
// Destruction steps
|
|
// =================
|
|
// 1. FormCloseQuery sets CanClose to FALSE calls TChromium.CloseBrowser which triggers the TChromium.OnClose event.
|
|
// 2. TChromium.OnClose sets aAction to cbaClose to destroy the browser, which triggers the TChromium.OnBeforeClose event.
|
|
// 3. TChromium.OnBeforeClose sets FCanClose := True and sends CEF_BEFORECLOSE to close the form.
|
|
|
|
uses
|
|
uCEFApplication;
|
|
|
|
{ TForm1 }
|
|
|
|
procedure TForm1.FormCreate(Sender: TObject);
|
|
begin
|
|
FCanClose := False;
|
|
FClosing := False;
|
|
|
|
Chromium1.DefaultURL := UTF8Decode(AddressEdt.Text);
|
|
end;
|
|
|
|
procedure TForm1.GoBtnClick(Sender: TObject);
|
|
begin
|
|
Chromium1.LoadURL(UTF8Decode(AddressEdt.Text));
|
|
end;
|
|
|
|
procedure TForm1.Timer1Timer(Sender: TObject);
|
|
begin
|
|
Timer1.Enabled := False;
|
|
if not(Chromium1.CreateBrowser(CEFLinkedWindowParent1.Handle, CEFLinkedWindowParent1.BoundsRect)) and
|
|
not(Chromium1.Initialized) then
|
|
Timer1.Enabled := True;
|
|
end;
|
|
|
|
procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: boolean);
|
|
begin
|
|
CanClose := FCanClose;
|
|
|
|
if not(FClosing) then
|
|
begin
|
|
FClosing := True;
|
|
Visible := False;
|
|
Chromium1.CloseBrowser(True);
|
|
end;
|
|
end;
|
|
|
|
procedure TForm1.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 extra_info: ICefDictionaryValue;
|
|
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 TForm1.Chromium1OpenUrlFromTab(Sender: TObject;
|
|
const browser: ICefBrowser; const frame: ICefFrame; const targetUrl: ustring;
|
|
targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean; out
|
|
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 TForm1.FormActivate(Sender: TObject);
|
|
begin
|
|
// if not(Chromium1.Initialized) and
|
|
// not(Chromium1.CreateBrowser(CEFLinkedWindowParent1.Handle, CEFLinkedWindowParent1.BoundsRect)) then
|
|
Timer1.Enabled := True;
|
|
end;
|
|
|
|
procedure TForm1.Chromium1Close(Sender: TObject; const browser: ICefBrowser; var aAction: TCefCloseBrowserAction);
|
|
begin
|
|
// continue closing the browser
|
|
if CEFLinkedWindowParent1.DestroyChildWindow then
|
|
aAction := cbaDelay
|
|
else
|
|
aAction := cbaClose;
|
|
end;
|
|
|
|
procedure TForm1.Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
|
|
begin
|
|
// We must wait until all browsers trigger the TChromium.OnBeforeClose event
|
|
// in order to close the application safely or we will have shutdown issues.
|
|
FCanClose := True;
|
|
Application.QueueAsyncCall(@BrowserBeforeCloseMsg, 0);
|
|
end;
|
|
|
|
procedure TForm1.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
|
|
begin
|
|
// Now the browser is fully initialized we can initialize the UI.
|
|
Application.QueueAsyncCall(@BrowserCreatedMsg, 0);
|
|
end;
|
|
|
|
procedure TForm1.CEFLinkedWindowParent1Enter(Sender: TObject);
|
|
begin
|
|
If not(csDesigning in ComponentState) then Chromium1.SetFocus(True);
|
|
end;
|
|
|
|
// This is a workaround for the CEF issue #2026
|
|
// https://bitbucket.org/chromiumembedded/cef/issues/2026/multiple-major-keyboard-focus-issues-on
|
|
// We use CEFLinkedWindowParent1.OnEnter, CEFLinkedWindowParent1.OnExit and
|
|
// TChromium.OnGotFocus to avoid most of the focus issues.
|
|
// CEFLinkedWindowParent1.TabStop must be TRUE.
|
|
procedure TForm1.CEFLinkedWindowParent1Exit(Sender: TObject);
|
|
begin
|
|
if not(csDesigning in ComponentState) then
|
|
Chromium1.SendCaptureLostEvent;
|
|
end;
|
|
|
|
procedure TForm1.BrowserCreatedMsg(Data: PtrInt);
|
|
begin
|
|
Caption := 'External-Pump Browser 2';
|
|
AddressPnl.Enabled := True;
|
|
end;
|
|
|
|
procedure TForm1.BrowserFocusMsg(Data: PtrInt);
|
|
begin
|
|
CEFLinkedWindowParent1.SetFocus;
|
|
end;
|
|
|
|
procedure TForm1.BrowserBeforeCloseMsg(Data: PtrInt);
|
|
begin
|
|
Close;
|
|
end;
|
|
|
|
procedure TForm1.Chromium1GotFocus(Sender: TObject; const browser: ICefBrowser);
|
|
begin
|
|
Application.QueueAsyncCall(@BrowserFocusMsg, 0);
|
|
end;
|
|
|
|
procedure TForm1.WMMove(var Message: TLMMove);
|
|
begin
|
|
inherited;
|
|
Chromium1.NotifyMoveOrResizeStarted;
|
|
end;
|
|
|
|
procedure TForm1.WMSize(var Message: TLMSize);
|
|
begin
|
|
inherited;
|
|
Chromium1.NotifyMoveOrResizeStarted;
|
|
end;
|
|
|
|
procedure TForm1.WMWindowPosChanged(var Message: TLMWindowPosChanged);
|
|
begin
|
|
inherited;
|
|
Chromium1.NotifyMoveOrResizeStarted;
|
|
end;
|
|
|
|
{$IFDEF WINDOWS}
|
|
procedure TForm1.WMEnterMenuLoop(var aMessage: TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := True;
|
|
end;
|
|
|
|
procedure TForm1.WMExitMenuLoop(var aMessage: TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := False;
|
|
end;
|
|
{$ENDIF}
|
|
|
|
initialization
|
|
{$IFDEF DARWIN} // $IFDEF MACOSX
|
|
AddCrDelegate;
|
|
{$ENDIF}
|
|
if GlobalCEFApp = nil then begin
|
|
CreateGlobalCEFApp;
|
|
if not GlobalCEFApp.StartMainProcess then begin
|
|
DestroyGlobalCEFApp;
|
|
DestroyGlobalCEFWorkScheduler;
|
|
halt(0); // exit the subprocess
|
|
end;
|
|
end;
|
|
|
|
finalization
|
|
(* Destroy from this unit, which is used after "Interfaces". So this happens before the Application object is destroyed *)
|
|
if GlobalCEFWorkScheduler <> nil then
|
|
GlobalCEFWorkScheduler.StopScheduler;
|
|
DestroyGlobalCEFApp;
|
|
DestroyGlobalCEFWorkScheduler;
|
|
|
|
end.
|
|
|