mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-11-16 08:15:55 +01:00
266 lines
8.8 KiB
ObjectPascal
266 lines
8.8 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 © 2021 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 uChildForm;
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{$I cef.inc}
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interface
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uses
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{$IFDEF DELPHI16_UP}
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Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Menus,
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Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ExtCtrls, System.Types, Vcl.ComCtrls, Vcl.ClipBrd,
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System.UITypes,
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{$ELSE}
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Windows, Messages, SysUtils, Variants, Classes, Graphics, Menus,
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Controls, Forms, Dialogs, StdCtrls, ExtCtrls, Types, ComCtrls, ClipBrd,
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{$ENDIF}
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uMainForm, uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFConstants, uCEFTypes,
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uCEFWinControl, uCEFChromiumCore;
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type
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TChildForm = class(TForm)
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Panel1: TPanel;
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Edit1: TEdit;
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Button1: TButton;
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Chromium1: TChromium;
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CEFWindowParent1: TCEFWindowParent;
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StatusBar1: TStatusBar;
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procedure FormClose(Sender: TObject; var Action: TCloseAction);
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procedure Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
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procedure Button1Click(Sender: TObject);
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procedure FormShow(Sender: TObject);
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procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
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procedure FormCreate(Sender: TObject);
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procedure Chromium1Close(Sender: TObject; const browser: ICefBrowser;
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var aAction : TCefCloseBrowserAction);
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procedure FormDestroy(Sender: TObject);
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procedure Chromium1BeforeClose(Sender: TObject;
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const browser: ICefBrowser);
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procedure Chromium1LoadingStateChange(Sender: TObject;
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const browser: ICefBrowser; isLoading, canGoBack,
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canGoForward: Boolean);
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procedure Chromium1StatusMessage(Sender: TObject;
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const browser: ICefBrowser; const value: ustring);
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procedure Chromium1BeforePopup(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame; const targetUrl,
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targetFrameName: ustring;
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targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean;
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const popupFeatures: TCefPopupFeatures; var windowInfo: TCefWindowInfo;
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var client: ICefClient; var settings: TCefBrowserSettings;
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var extra_info: ICefDictionaryValue;
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var noJavascriptAccess: Boolean; var Result: Boolean);
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private
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// Variables to control when can we destroy the form safely
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FCanClose : boolean; // Set to True in TChromium.OnBeforeClose
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FClosing : boolean; // Set to True in the CloseQuery event.
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protected
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procedure BrowserCreatedMsg(var aMessage : TMessage); message CEFBROWSER_CREATED;
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procedure BrowserDestroyMsg(var aMessage : TMessage); message CEFBROWSER_DESTROY;
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procedure WMMove(var aMessage : TWMMove); message WM_MOVE;
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procedure WMMoving(var aMessage : TMessage); message WM_MOVING;
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procedure WMEnterMenuLoop(var aMessage: TMessage); message WM_ENTERMENULOOP;
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procedure WMExitMenuLoop(var aMessage: TMessage); message WM_EXITMENULOOP;
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public
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property Closing : boolean read FClosing;
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end;
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implementation
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{$R *.dfm}
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// Destruction steps
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// =================
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// 1. FormCloseQuery calls TChromium.CloseBrowser
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// 2. TChromium.OnClose sends a CEFBROWSER_DESTROY message to destroy CEFWindowParent1 in the main thread.
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// 3. TChromium.OnBeforeClose sets FCanClose := True and sends WM_CLOSE to the form.
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uses
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uCEFRequestContext, uCEFApplication;
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procedure TChildForm.Button1Click(Sender: TObject);
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begin
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Chromium1.LoadURL(Edit1.Text);
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end;
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procedure TChildForm.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
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begin
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PostMessage(Handle, CEFBROWSER_CREATED, 0, 0);
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end;
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procedure TChildForm.Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
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begin
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FCanClose := True;
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PostMessage(Handle, WM_CLOSE, 0, 0);
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end;
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procedure TChildForm.Chromium1BeforePopup(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame; const targetUrl,
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targetFrameName: ustring; targetDisposition: TCefWindowOpenDisposition;
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userGesture: Boolean; const popupFeatures: TCefPopupFeatures;
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var windowInfo: TCefWindowInfo; var client: ICefClient;
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var settings: TCefBrowserSettings;
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var extra_info: ICefDictionaryValue;
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var noJavascriptAccess: Boolean;
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var Result: Boolean);
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begin
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// For simplicity, this demo blocks all popup windows and new tabs
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Result := (targetDisposition in [WOD_NEW_FOREGROUND_TAB, WOD_NEW_BACKGROUND_TAB, WOD_NEW_POPUP, WOD_NEW_WINDOW]);
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end;
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procedure TChildForm.Chromium1Close(Sender: TObject; const browser: ICefBrowser; var aAction : TCefCloseBrowserAction);
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begin
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PostMessage(Handle, CEFBROWSER_DESTROY, 0, 0);
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aAction := cbaDelay;
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end;
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procedure TChildForm.Chromium1LoadingStateChange(Sender: TObject; const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean);
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begin
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if isLoading then
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begin
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StatusBar1.Panels[0].Text := 'Loading...';
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cursor := crAppStart;
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end
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else
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begin
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StatusBar1.Panels[0].Text := '';
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cursor := crDefault;
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end;
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end;
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procedure TChildForm.Chromium1StatusMessage(Sender: TObject; const browser: ICefBrowser; const value: ustring);
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begin
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StatusBar1.Panels[1].Text := value;
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end;
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procedure TChildForm.FormClose(Sender: TObject; var Action: TCloseAction);
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begin
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Action := caFree;
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end;
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procedure TChildForm.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
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begin
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CanClose := FCanClose;
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if not(FClosing) and Panel1.Enabled then
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begin
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FClosing := True;
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Panel1.Enabled := False;
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Chromium1.CloseBrowser(True);
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end;
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end;
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procedure TChildForm.FormCreate(Sender: TObject);
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begin
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FCanClose := False;
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FClosing := False;
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end;
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procedure TChildForm.FormDestroy(Sender: TObject);
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begin
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// Tell the main form that a child has been destroyed.
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// The main form will check if this was the last child to close itself
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PostMessage(MainForm.Handle, CEFBROWSER_CHILDDESTROYED, 0, 0);
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end;
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procedure TChildForm.FormShow(Sender: TObject);
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var
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TempContext : ICefRequestContext;
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begin
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// The new request context overrides several GlobalCEFApp properties like :
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// cache, AcceptLanguageList, PersistSessionCookies, PersistUserPreferences and
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// IgnoreCertificateErrors.
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// If you use an empty cache path, CEF will use in-memory cache.
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// The cache directories of all the browsers *MUST* be a subdirectory of
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// GlobalCEFApp.RootCache unless you use a blank cache (in-memory).
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if MainForm.NewContextChk.Checked then
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TempContext := TCefRequestContextRef.New('', '', '', False, False, False, False)
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else
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TempContext := nil;
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Chromium1.CreateBrowser(CEFWindowParent1, '', TempContext);
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end;
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procedure TChildForm.WMMove(var aMessage : TWMMove);
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begin
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inherited;
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if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
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end;
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procedure TChildForm.WMMoving(var aMessage : TMessage);
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begin
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inherited;
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if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
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end;
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procedure TChildForm.WMEnterMenuLoop(var aMessage: TMessage);
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begin
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inherited;
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if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := True;
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end;
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procedure TChildForm.WMExitMenuLoop(var aMessage: TMessage);
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begin
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inherited;
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if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := False;
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end;
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procedure TChildForm.BrowserCreatedMsg(var aMessage : TMessage);
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begin
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CEFWindowParent1.UpdateSize;
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Panel1.Enabled := True;
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Button1.Click;
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end;
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procedure TChildForm.BrowserDestroyMsg(var aMessage : TMessage);
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begin
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CEFWindowParent1.Free;
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end;
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end.
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