mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-11-16 08:15:55 +01:00
292 lines
9.3 KiB
ObjectPascal
292 lines
9.3 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 uChildForm;
|
|
|
|
{$I cef.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
{$IFDEF DELPHI16_UP}
|
|
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
|
|
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ExtCtrls,
|
|
System.UITypes,
|
|
{$ELSE}
|
|
Windows, Messages, SysUtils, Variants, Classes, Graphics,
|
|
Controls, Forms, Dialogs, ExtCtrls,
|
|
{$ENDIF}
|
|
uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFConstants, uCEFTypes, uMainForm,
|
|
uCEFWinControl, uCEFChromiumCore;
|
|
|
|
type
|
|
TChildForm = class(TForm)
|
|
CEFWindowParent1: TCEFWindowParent;
|
|
Chromium1: TChromium;
|
|
procedure FormShow(Sender: TObject);
|
|
procedure FormCreate(Sender: TObject);
|
|
procedure FormClose(Sender: TObject; var Action: TCloseAction);
|
|
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
|
|
procedure FormDestroy(Sender: TObject);
|
|
procedure Chromium1AfterCreated(Sender: TObject;
|
|
const browser: ICefBrowser);
|
|
procedure Chromium1Close(Sender: TObject; const browser: ICefBrowser;
|
|
var aAction : TCefCloseBrowserAction);
|
|
procedure Chromium1PreKeyEvent(Sender: TObject;
|
|
const browser: ICefBrowser; const event: PCefKeyEvent; osEvent: PMsg;
|
|
out isKeyboardShortcut, Result: Boolean);
|
|
procedure Chromium1KeyEvent(Sender: TObject;
|
|
const browser: ICefBrowser; const event: PCefKeyEvent; osEvent: PMsg;
|
|
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 extra_info: ICefDictionaryValue;
|
|
var noJavascriptAccess: Boolean; var Result: Boolean);
|
|
|
|
private
|
|
// 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.
|
|
FHomepage : string;
|
|
|
|
protected
|
|
procedure BrowserCreatedMsg(var aMessage : TMessage); message CEFBROWSER_CREATED;
|
|
procedure BrowserDestroyMsg(var aMessage : TMessage); message CEFBROWSER_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;
|
|
|
|
procedure HandleKeyUp(const aMsg : TMsg; var aHandled : boolean);
|
|
procedure HandleKeyDown(const aMsg : TMsg; var aHandled : boolean);
|
|
|
|
public
|
|
property Closing : boolean read FClosing;
|
|
property Homepage : string read FHomepage write FHomepage;
|
|
end;
|
|
|
|
implementation
|
|
|
|
{$R *.dfm}
|
|
|
|
uses
|
|
uCEFApplication;
|
|
|
|
// Destruction steps
|
|
// =================
|
|
// 1. FormCloseQuery calls TChromium.CloseBrowser
|
|
// 2. TChromium.OnClose sends a CEFBROWSER_DESTROY message to destroy CEFWindowParent1 in the main thread.
|
|
// 3. TChromium.OnBeforeClose sets FCanClose := True and sends WM_CLOSE to the form.
|
|
|
|
procedure TChildForm.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
|
|
begin
|
|
PostMessage(Handle, CEFBROWSER_CREATED, 0, 0);
|
|
end;
|
|
|
|
procedure TChildForm.Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
|
|
begin
|
|
FCanClose := True;
|
|
PostMessage(Handle, WM_CLOSE, 0, 0);
|
|
end;
|
|
|
|
procedure TChildForm.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 TChildForm.Chromium1Close(Sender: TObject; const browser: ICefBrowser; var aAction : TCefCloseBrowserAction);
|
|
begin
|
|
PostMessage(Handle, CEFBROWSER_DESTROY, 0, 0);
|
|
aAction := cbaDelay;
|
|
end;
|
|
|
|
procedure TChildForm.Chromium1KeyEvent(Sender: TObject;
|
|
const browser: ICefBrowser; const event: PCefKeyEvent; osEvent: PMsg;
|
|
out Result: Boolean);
|
|
var
|
|
TempMsg : TMsg;
|
|
begin
|
|
Result := False;
|
|
|
|
if (event <> nil) and (osEvent <> nil) then
|
|
case osEvent.Message of
|
|
WM_KEYUP :
|
|
begin
|
|
TempMsg := osEvent^;
|
|
HandleKeyUp(TempMsg, Result);
|
|
end;
|
|
|
|
WM_KEYDOWN :
|
|
begin
|
|
TempMsg := osEvent^;
|
|
HandleKeyDown(TempMsg, Result);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure TChildForm.HandleKeyUp(const aMsg : TMsg; var aHandled : boolean);
|
|
var
|
|
TempMessage : TMessage;
|
|
TempKeyMsg : TWMKey;
|
|
begin
|
|
TempMessage.Msg := aMsg.message;
|
|
TempMessage.wParam := aMsg.wParam;
|
|
TempMessage.lParam := aMsg.lParam;
|
|
TempKeyMsg := TWMKey(TempMessage);
|
|
|
|
if (TempKeyMsg.CharCode = VK_ESCAPE) then
|
|
begin
|
|
aHandled := True;
|
|
PostMessage(Handle, WM_CLOSE, 0, 0);
|
|
end;
|
|
end;
|
|
|
|
procedure TChildForm.HandleKeyDown(const aMsg : TMsg; var aHandled : boolean);
|
|
var
|
|
TempMessage : TMessage;
|
|
TempKeyMsg : TWMKey;
|
|
begin
|
|
TempMessage.Msg := aMsg.message;
|
|
TempMessage.wParam := aMsg.wParam;
|
|
TempMessage.lParam := aMsg.lParam;
|
|
TempKeyMsg := TWMKey(TempMessage);
|
|
|
|
if (TempKeyMsg.CharCode = VK_ESCAPE) then aHandled := True;
|
|
end;
|
|
|
|
procedure TChildForm.Chromium1PreKeyEvent(Sender: TObject;
|
|
const browser: ICefBrowser; const event: PCefKeyEvent; osEvent: PMsg;
|
|
out isKeyboardShortcut, Result: Boolean);
|
|
begin
|
|
Result := False;
|
|
|
|
if (event <> nil) and
|
|
(event.kind in [KEYEVENT_KEYDOWN, KEYEVENT_KEYUP]) and
|
|
(event.windows_key_code = VK_ESCAPE) then
|
|
isKeyboardShortcut := True;
|
|
end;
|
|
|
|
procedure TChildForm.FormClose(Sender: TObject; var Action: TCloseAction);
|
|
begin
|
|
Action := caFree;
|
|
end;
|
|
|
|
procedure TChildForm.FormCloseQuery(Sender: TObject;
|
|
var CanClose: Boolean);
|
|
begin
|
|
CanClose := FCanClose;
|
|
|
|
if not(FClosing) then
|
|
begin
|
|
FClosing := True;
|
|
Chromium1.CloseBrowser(True);
|
|
end;
|
|
end;
|
|
|
|
procedure TChildForm.FormCreate(Sender: TObject);
|
|
begin
|
|
FCanClose := False;
|
|
FClosing := False;
|
|
end;
|
|
|
|
procedure TChildForm.FormDestroy(Sender: TObject);
|
|
begin
|
|
// Tell the main form that a child has been destroyed.
|
|
// The main form will check if this was the last child to close itself
|
|
PostMessage(MainForm.Handle, CEFBROWSER_CHILDDESTROYED, 0, 0);
|
|
end;
|
|
|
|
procedure TChildForm.FormShow(Sender: TObject);
|
|
begin
|
|
Chromium1.CreateBrowser(CEFWindowParent1, '');
|
|
end;
|
|
|
|
procedure TChildForm.WMMove(var aMessage : TWMMove);
|
|
begin
|
|
inherited;
|
|
|
|
if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
|
|
end;
|
|
|
|
procedure TChildForm.WMMoving(var aMessage : TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
|
|
end;
|
|
|
|
procedure TChildForm.WMEnterMenuLoop(var aMessage: TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := True;
|
|
end;
|
|
|
|
procedure TChildForm.WMExitMenuLoop(var aMessage: TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := False;
|
|
end;
|
|
|
|
procedure TChildForm.BrowserCreatedMsg(var aMessage : TMessage);
|
|
begin
|
|
CEFWindowParent1.UpdateSize;
|
|
Chromium1.LoadURL(FHomepage);
|
|
end;
|
|
|
|
procedure TChildForm.BrowserDestroyMsg(var aMessage : TMessage);
|
|
begin
|
|
CEFWindowParent1.Free;
|
|
end;
|
|
|
|
end.
|