mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-11-16 08:15:55 +01:00
769aa4f384
- Added lots of conditional compiler directives to build CEF4DElphi in Linux using Lazarus/FPC - Updated copyright year
576 lines
18 KiB
ObjectPascal
576 lines
18 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 CEF3 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 © 2019 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 uMainForm;
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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,
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Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ComCtrls, Vcl.Buttons, Vcl.ExtCtrls, Vcl.StdCtrls,
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{$ELSE}
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Windows, Messages, SysUtils, Variants, Classes, Graphics,
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Controls, Forms, Dialogs, ComCtrls, Buttons, ExtCtrls, StdCtrls,
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{$ENDIF}
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uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFApplication, uCEFTypes, uCEFConstants;
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const
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CEFBROWSER_DESTROYWNDPARENT = WM_APP + $100;
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CEFBROWSER_DESTROYTAB = WM_APP + $101;
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CEFBROWSER_INITIALIZED = WM_APP + $102;
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CEFBROWSER_CHECKTAGGEDTABS = WM_APP + $103;
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type
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TMainForm = class(TForm)
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PageControl1: TPageControl;
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ButtonPnl: TPanel;
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NavButtonPnl: TPanel;
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BackBtn: TButton;
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ForwardBtn: TButton;
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ReloadBtn: TButton;
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StopBtn: TButton;
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ConfigPnl: TPanel;
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GoBtn: TButton;
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URLEditPnl: TPanel;
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URLCbx: TComboBox;
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AddTabBtn: TButton;
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RemoveTabBtn: TButton;
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procedure AddTabBtnClick(Sender: TObject);
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procedure RemoveTabBtnClick(Sender: TObject);
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procedure FormShow(Sender: TObject);
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procedure PageControl1Change(Sender: TObject);
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procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
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procedure BackBtnClick(Sender: TObject);
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procedure ForwardBtnClick(Sender: TObject);
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procedure ReloadBtnClick(Sender: TObject);
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procedure StopBtnClick(Sender: TObject);
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procedure GoBtnClick(Sender: TObject);
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procedure FormCreate(Sender: TObject);
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protected
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FClosingTab : boolean;
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FCanClose : boolean;
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FClosing : boolean;
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procedure Chromium_OnAfterCreated(Sender: TObject; const browser: ICefBrowser);
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procedure Chromium_OnAddressChange(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const url: ustring);
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procedure Chromium_OnTitleChange(Sender: TObject; const browser: ICefBrowser; const title: ustring);
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procedure Chromium_OnClose(Sender: TObject; const browser: ICefBrowser; out Result: Boolean);
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procedure Chromium_OnBeforeClose(Sender: TObject; const browser: ICefBrowser);
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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);
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procedure BrowserCreatedMsg(var aMessage : TMessage); message CEF_AFTERCREATED;
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procedure BrowserDestroyWindowParentMsg(var aMessage : TMessage); message CEFBROWSER_DESTROYWNDPARENT;
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procedure BrowserDestroyTabMsg(var aMessage : TMessage); message CEFBROWSER_DESTROYTAB;
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procedure BrowserCheckTaggedTabsMsg(var aMessage : TMessage); message CEFBROWSER_CHECKTAGGEDTABS;
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procedure CEFInitializedMsg(var aMessage : TMessage); message CEFBROWSER_INITIALIZED;
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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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function AllTabSheetsAreTagged : boolean;
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procedure CloseAllBrowsers;
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function GetPageIndex(const aSender : TObject; var aPageIndex : integer) : boolean;
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procedure NotifyMoveOrResizeStarted;
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function SearchChromium(aPageIndex : integer; var aChromium : TChromium) : boolean;
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function SearchWindowParent(aPageIndex : integer; var aWindowParent : TCEFWindowParent) : boolean;
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public
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{ Public declarations }
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end;
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var
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MainForm: TMainForm;
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procedure CreateGlobalCEFApp;
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implementation
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{$R *.dfm}
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// This is just a simplified demo with tab handling.
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// It's not meant to be a complete browser or the best way to implement a tabbed browser.
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// In this demo all browsers share the buttons and URL combobox.
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// All TChromium components share the same functions for their events sending the
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// PageIndex of the Tab where they are included in the Message.lParam parameter if necessary.
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// For simplicity the Button panel and the PageControl are disabled while adding or removing tab sheets.
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// The Form can't be closed if it's destroying a tab.
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// This is the destruction sequence when a user closes a tab sheet:
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// 1. RemoveTabBtnClick calls TChromium.CloseBrowser of the selected tab which triggers a TChromium.OnClose event.
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// 2. TChromium.OnClose sends a CEFBROWSER_DESTROYWNDPARENT message to destroy TCEFWindowParent in the main thread which triggers a TChromium.OnBeforeClose event.
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// 3. TChromium.OnBeforeClose sends a CEFBROWSER_DESTROYTAB message to destroy the tab in the main thread.
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// This is the destruction sequence when the user closes the main form
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// 1. FormCloseQuery hides the form and calls CloseAllBrowsers which calls TChromium.CloseBrowser in all tabs and triggers the TChromium.OnClose event.
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// 2. TChromium.OnClose sends a CEFBROWSER_DESTROYWNDPARENT message to destroy TCEFWindowParent in the main thread which triggers a TChromium.OnBeforeClose event.
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// 3. TChromium.OnBeforeClose sends a CEFBROWSER_CHECKTAGGEDTABS message to set the TAG property to 1 in the TabSheet containing the TChromium. Then sends WM_CLOSE in case all tabsheets have a TAG = 1.
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procedure GlobalCEFApp_OnContextInitialized;
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begin
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if (MainForm <> nil) and MainForm.HandleAllocated then
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PostMessage(MainForm.Handle, CEFBROWSER_INITIALIZED, 0, 0);
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end;
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procedure CreateGlobalCEFApp;
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begin
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GlobalCEFApp := TCefApplication.Create;
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GlobalCEFApp.OnContextInitialized := GlobalCEFApp_OnContextInitialized;
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end;
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procedure TMainForm.AddTabBtnClick(Sender: TObject);
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var
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TempSheet : TTabSheet;
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TempWindowParent : TCEFWindowParent;
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TempChromium : TChromium;
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begin
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ButtonPnl.Enabled := False;
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PageControl1.Enabled := False;
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TempSheet := TTabSheet.Create(PageControl1);
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TempSheet.Caption := 'New Tab';
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TempSheet.PageControl := PageControl1;
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TempWindowParent := TCEFWindowParent.Create(TempSheet);
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TempWindowParent.Parent := TempSheet;
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TempWindowParent.Color := clWhite;
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TempWindowParent.Align := alClient;
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TempChromium := TChromium.Create(TempSheet);
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TempChromium.OnAfterCreated := Chromium_OnAfterCreated;
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TempChromium.OnAddressChange := Chromium_OnAddressChange;
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TempChromium.OnTitleChange := Chromium_OnTitleChange;
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TempChromium.OnClose := Chromium_OnClose;
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TempChromium.OnBeforeClose := Chromium_OnBeforeClose;
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TempChromium.OnBeforePopup := Chromium_OnBeforePopup;
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TempChromium.CreateBrowser(TempWindowParent, '');
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end;
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procedure TMainForm.RemoveTabBtnClick(Sender: TObject);
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var
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TempChromium : TChromium;
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begin
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if SearchChromium(PageControl1.TabIndex, TempChromium) then
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begin
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FClosingTab := True;
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ButtonPnl.Enabled := False;
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PageControl1.Enabled := False;
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TempChromium.CloseBrowser(True);
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end;
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end;
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procedure TMainForm.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
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begin
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if FClosingTab then
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CanClose := False
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else
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begin
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CanClose := FCanClose;
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if not(FClosing) then
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begin
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FClosing := True;
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Visible := False;
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CloseAllBrowsers;
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end;
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end;
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end;
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procedure TMainForm.CloseAllBrowsers;
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var
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i, j, k : integer;
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TempComponent : TComponent;
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TempSheet : TTabSheet;
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TempCtnue : boolean;
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begin
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k := pred(PageControl1.PageCount);
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while (k >= 0) do
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begin
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TempSheet := PageControl1.Pages[k];
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TempCtnue := True;
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i := 0;
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j := TempSheet.ComponentCount;
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while (i < j) and TempCtnue do
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begin
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TempComponent := TempSheet.Components[i];
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if (TempComponent <> nil) and (TempComponent is TChromium) then
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begin
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TChromium(TempComponent).CloseBrowser(True);
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TempCtnue := False;
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end
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else
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inc(i);
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end;
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dec(k);
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end;
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end;
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procedure TMainForm.FormCreate(Sender: TObject);
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begin
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FClosingTab := False;
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FCanClose := False;
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FClosing := False;
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end;
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procedure TMainForm.FormShow(Sender: TObject);
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begin
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if (GlobalCEFApp <> nil) and
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GlobalCEFApp.GlobalContextInitialized and
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not(ButtonPnl.Enabled) then
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begin
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ButtonPnl.Enabled := True;
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Caption := 'Tab Browser';
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cursor := crDefault;
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if (PageControl1.PageCount = 0) then AddTabBtn.Click;
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end;
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end;
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procedure TMainForm.ForwardBtnClick(Sender: TObject);
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var
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TempChromium : TChromium;
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begin
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if SearchChromium(PageControl1.TabIndex, TempChromium) then TempChromium.GoForward;
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end;
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procedure TMainForm.GoBtnClick(Sender: TObject);
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var
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TempChromium : TChromium;
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begin
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if SearchChromium(PageControl1.TabIndex, TempChromium) then TempChromium.LoadURL(URLCbx.Text);
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end;
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procedure TMainForm.ReloadBtnClick(Sender: TObject);
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var
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TempChromium : TChromium;
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begin
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if SearchChromium(PageControl1.TabIndex, TempChromium) then TempChromium.Reload;
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end;
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procedure TMainForm.BackBtnClick(Sender: TObject);
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var
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TempChromium : TChromium;
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begin
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if SearchChromium(PageControl1.TabIndex, TempChromium) then TempChromium.GoBack;
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end;
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procedure TMainForm.StopBtnClick(Sender: TObject);
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var
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TempChromium : TChromium;
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begin
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if SearchChromium(PageControl1.TabIndex, TempChromium) then TempChromium.StopLoad;
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end;
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procedure TMainForm.BrowserCreatedMsg(var aMessage : TMessage);
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var
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TempWindowParent : TCEFWindowParent;
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TempChromium : TChromium;
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begin
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ButtonPnl.Enabled := True;
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PageControl1.Enabled := True;
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if SearchWindowParent(aMessage.lParam, TempWindowParent) then
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TempWindowParent.UpdateSize;
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if SearchChromium(aMessage.lParam, TempChromium) then
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TempChromium.LoadURL(URLCbx.Items[0]);
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end;
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procedure TMainForm.BrowserDestroyWindowParentMsg(var aMessage : TMessage);
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var
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TempWindowParent : TCEFWindowParent;
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begin
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if SearchWindowParent(aMessage.lParam, TempWindowParent) then TempWindowParent.Free;
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end;
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procedure TMainForm.BrowserDestroyTabMsg(var aMessage : TMessage);
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begin
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if (aMessage.lParam >= 0) and
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(aMessage.lParam < PageControl1.PageCount) then
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PageControl1.Pages[aMessage.lParam].Free;
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FClosingTab := False;
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ButtonPnl.Enabled := True;
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PageControl1.Enabled := True;
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end;
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procedure TMainForm.BrowserCheckTaggedTabsMsg(var aMessage : TMessage);
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begin
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if (aMessage.lParam >= 0) and
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(aMessage.lParam < PageControl1.PageCount) then
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begin
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PageControl1.Pages[aMessage.lParam].Tag := 1;
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if AllTabSheetsAreTagged then
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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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end;
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end;
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function TMainForm.AllTabSheetsAreTagged : boolean;
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var
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i : integer;
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begin
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Result := True;
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i := pred(PageControl1.PageCount);
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while (i >= 0) and Result do
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if (PageControl1.Pages[i].Tag <> 1) then
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Result := False
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else
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dec(i);
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end;
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procedure TMainForm.Chromium_OnAfterCreated(Sender: TObject; const browser: ICefBrowser);
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var
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TempPageIndex : integer;
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begin
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if GetPageIndex(Sender, TempPageIndex) then
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PostMessage(Handle, CEF_AFTERCREATED, 0, TempPageIndex);
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end;
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procedure TMainForm.Chromium_OnAddressChange(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const url: ustring);
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var
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TempPageIndex : integer;
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begin
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if not(FClosing) and
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(PageControl1.TabIndex >= 0) and
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GetPageIndex(Sender, TempPageIndex) and
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(PageControl1.TabIndex = TempPageIndex) then
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URLCbx.Text := url;
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end;
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function TMainForm.GetPageIndex(const aSender : TObject; var aPageIndex : integer) : boolean;
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begin
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Result := False;
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aPageIndex := -1;
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if (aSender <> nil) and
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(aSender is TComponent) and
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(TComponent(aSender).Owner <> nil) and
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(TComponent(aSender).Owner is TTabSheet) then
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begin
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aPageIndex := TTabSheet(TComponent(aSender).Owner).PageIndex;
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Result := True;
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end;
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end;
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procedure TMainForm.Chromium_OnTitleChange(Sender: TObject; const browser: ICefBrowser; const title: ustring);
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var
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TempPageIndex : integer;
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begin
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if not(FClosing) and GetPageIndex(Sender, TempPageIndex) then
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PageControl1.Pages[TempPageIndex].Caption := title;
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end;
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procedure TMainForm.Chromium_OnClose(Sender: TObject; const browser: ICefBrowser; out Result: Boolean);
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var
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TempPageIndex : integer;
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begin
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if GetPageIndex(Sender, TempPageIndex) then
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PostMessage(Handle, CEFBROWSER_DESTROYWNDPARENT, 0, TempPageIndex);
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Result := False;
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end;
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procedure TMainForm.Chromium_OnBeforeClose(Sender: TObject; const browser: ICefBrowser);
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var
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TempPageIndex : integer;
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begin
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if GetPageIndex(Sender, TempPageIndex) then
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begin
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if FClosing then
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PostMessage(Handle, CEFBROWSER_CHECKTAGGEDTABS, 0, TempPageIndex)
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else
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PostMessage(Handle, CEFBROWSER_DESTROYTAB, 0, TempPageIndex);
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end;
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end;
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procedure TMainForm.Chromium_OnBeforePopup(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; 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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function TMainForm.SearchChromium(aPageIndex : integer; var aChromium : TChromium) : boolean;
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var
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i, j : integer;
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TempComponent : TComponent;
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TempSheet : TTabSheet;
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begin
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Result := False;
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aChromium := nil;
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if (aPageIndex >= 0) and (aPageIndex < PageControl1.PageCount) then
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begin
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TempSheet := PageControl1.Pages[aPageIndex];
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i := 0;
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j := TempSheet.ComponentCount;
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while (i < j) and not(Result) do
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begin
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TempComponent := TempSheet.Components[i];
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if (TempComponent <> nil) and (TempComponent is TChromium) then
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begin
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aChromium := TChromium(TempComponent);
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Result := True;
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end
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else
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inc(i);
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end;
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end;
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end;
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function TMainForm.SearchWindowParent(aPageIndex : integer; var aWindowParent : TCEFWindowParent) : boolean;
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var
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i, j : integer;
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TempControl : TControl;
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TempSheet : TTabSheet;
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begin
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Result := False;
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aWindowParent := nil;
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if (aPageIndex >= 0) and (aPageIndex < PageControl1.PageCount) then
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begin
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TempSheet := PageControl1.Pages[aPageIndex];
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i := 0;
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j := TempSheet.ControlCount;
|
|
|
|
while (i < j) and not(Result) do
|
|
begin
|
|
TempControl := TempSheet.Controls[i];
|
|
|
|
if (TempControl <> nil) and (TempControl is TCEFWindowParent) then
|
|
begin
|
|
aWindowParent := TCEFWindowParent(TempControl);
|
|
Result := True;
|
|
end
|
|
else
|
|
inc(i);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure TMainForm.NotifyMoveOrResizeStarted;
|
|
var
|
|
i, j : integer;
|
|
TempChromium : TChromium;
|
|
begin
|
|
if not(showing) or (PageControl1 = nil) or FClosing then exit;
|
|
|
|
i := 0;
|
|
j := PageControl1.PageCount;
|
|
|
|
while (i < j) do
|
|
begin
|
|
if SearchChromium(i, TempChromium) then TempChromium.NotifyMoveOrResizeStarted;
|
|
|
|
inc(i);
|
|
end;
|
|
end;
|
|
|
|
procedure TMainForm.WMMove(var aMessage : TWMMove);
|
|
begin
|
|
inherited;
|
|
|
|
NotifyMoveOrResizeStarted;
|
|
end;
|
|
|
|
procedure TMainForm.WMMoving(var aMessage : TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
NotifyMoveOrResizeStarted;
|
|
end;
|
|
|
|
procedure TMainForm.WMEnterMenuLoop(var aMessage: TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if not(FClosing) and (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then
|
|
GlobalCEFApp.OsmodalLoop := True;
|
|
end;
|
|
|
|
procedure TMainForm.WMExitMenuLoop(var aMessage: TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if not(FClosing) and (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then
|
|
GlobalCEFApp.OsmodalLoop := False;
|
|
end;
|
|
|
|
procedure TMainForm.PageControl1Change(Sender: TObject);
|
|
var
|
|
TempChromium : TChromium;
|
|
begin
|
|
if showing and SearchChromium(PageControl1.TabIndex, TempChromium) then
|
|
URLCbx.Text := TempChromium.DocumentURL;
|
|
end;
|
|
|
|
procedure TMainForm.CEFInitializedMsg(var aMessage : TMessage);
|
|
begin
|
|
if not(ButtonPnl.Enabled) then
|
|
begin
|
|
ButtonPnl.Enabled := True;
|
|
Caption := 'Tab Browser';
|
|
cursor := crDefault;
|
|
if (PageControl1.PageCount = 0) then AddTabBtn.Click;
|
|
end;
|
|
end;
|
|
|
|
end.
|