mirror of
https://github.com/salvadordf/CEF4Delphi.git
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313 lines
11 KiB
ObjectPascal
313 lines
11 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,
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System.SyncObjs, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls,
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Vcl.ExtCtrls,
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{$ELSE}
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Windows, Messages, SysUtils, Variants, Classes, SyncObjs,
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Graphics, Controls, Forms, Dialogs, StdCtrls, ExtCtrls,
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{$ENDIF}
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uCEFChromium, uCEFTypes, uCEFInterfaces, uCEFConstants, uCEFWindowParent, uCEFWinControl,
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uCEFChromiumCore;
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const
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CEF_UPDATECAPTION = WM_APP + $A55;
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type
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TChildForm = class(TForm)
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Chromium1: TChromium;
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CEFWindowParent1: TCEFWindowParent;
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procedure FormCreate(Sender: TObject);
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procedure FormDestroy(Sender: TObject);
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procedure FormClose(Sender: TObject; var Action: TCloseAction);
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procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
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procedure Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
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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);
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procedure Chromium1TitleChange(Sender: TObject; const browser: ICefBrowser; const title: ustring);
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procedure Chromium1Close(Sender: TObject; const browser: ICefBrowser; var aAction : TCefCloseBrowserAction);
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procedure Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
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procedure Chromium1OpenUrlFromTab(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const targetUrl: ustring; targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean; out Result: Boolean);
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protected
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FCriticalSection : TCriticalSection;
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FCanClose : boolean;
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FClosing : boolean;
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FBrowserWasCreated : boolean;
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FTitle : string;
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FPopupFeatures : TCefPopupFeatures;
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function GetInitialized : boolean;
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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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procedure BrowserDestroyMsg(var aMessage : TMessage); message CEF_DESTROY;
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procedure BrowserUpdateCaptionMsg(var aMessage : TMessage); message CEF_UPDATECAPTION;
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public
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procedure AfterConstruction; override;
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function CreateBrowser(const aHomepage : string) : boolean;
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function CreateClientHandler(var windowInfo : TCefWindowInfo; var client : ICefClient; const targetFrameName : string; const popupFeatures : TCefPopupFeatures) : boolean;
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procedure ApplyPopupFeatures;
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property Initialized : boolean read GetInitialized;
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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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uses
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{$IFDEF DELPHI16_UP}
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System.Math,
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{$ELSE}
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Math,
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{$ENDIF}
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uCEFMiscFunctions, uCEFApplication, uMainForm;
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// Destruction steps
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// =================
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// 1. FormCloseQuery sets CanClose to FALSE calls TChromium.CloseBrowser which
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// triggers the TChromium.OnClose event.
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// 2. TChromium.OnClose sends a CEFBROWSER_DESTROY message to destroy CEFWindowParent1
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// in the main thread, which triggers the TChromium.OnBeforeClose event.
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// 3. TChromium.OnBeforeClose sets FCanClose := True and sends WM_CLOSE to the form.
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procedure TChildForm.AfterConstruction;
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begin
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inherited AfterConstruction;
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CreateHandle;
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CEFWindowParent1.CreateHandle;
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end;
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function TChildForm.CreateClientHandler(var windowInfo : TCefWindowInfo;
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var client : ICefClient;
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const targetFrameName : string;
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const popupFeatures : TCefPopupFeatures) : boolean;
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var
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TempRect : TRect;
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begin
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if CEFWindowParent1.HandleAllocated and
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Chromium1.CreateClientHandler(client, False) then
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begin
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Result := True;
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FPopupFeatures := popupFeatures;
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TempRect := CEFWindowParent1.ClientRect;
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if (FPopupFeatures.widthset <> 0) then TempRect.Right := max(FPopupFeatures.width, 100);
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if (FPopupFeatures.heightset <> 0) then TempRect.Bottom := max(FPopupFeatures.height, 100);
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WindowInfoAsChild(windowInfo, CEFWindowParent1.Handle, TempRect, '');
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end
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else
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Result := False;
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end;
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function TChildForm.CreateBrowser(const aHomepage : string) : boolean;
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begin
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Chromium1.DefaultURL := aHomepage;
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Result := Chromium1.CreateBrowser(CEFWindowParent1);
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end;
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procedure TChildForm.ApplyPopupFeatures;
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begin
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if (FPopupFeatures.xset <> 0) then Chromium1.SetFormLeftTo(FPopupFeatures.x);
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if (FPopupFeatures.yset <> 0) then Chromium1.SetFormTopTo(FPopupFeatures.y);
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if (FPopupFeatures.widthset <> 0) then Chromium1.ResizeFormWidthTo(FPopupFeatures.width);
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if (FPopupFeatures.heightset <> 0) then Chromium1.ResizeFormHeightTo(FPopupFeatures.height);
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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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FBrowserWasCreated := True;
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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;
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const frame : ICefFrame;
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const targetUrl : ustring;
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const targetFrameName : ustring;
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targetDisposition : TCefWindowOpenDisposition;
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userGesture : Boolean;
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const popupFeatures : TCefPopupFeatures;
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var windowInfo : TCefWindowInfo;
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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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Result := not(TMainForm(Owner).DoOnBeforePopup(windowInfo, client, targetFrameName, popupFeatures, targetDisposition));
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end;
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procedure TChildForm.Chromium1OpenUrlFromTab( Sender : TObject;
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const browser : ICefBrowser;
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const frame : ICefFrame;
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const targetUrl : ustring;
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targetDisposition : TCefWindowOpenDisposition;
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userGesture : Boolean;
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out Result : Boolean);
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begin
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Result := not(TMainForm(Owner).DoOpenUrlFromTab(targetUrl, targetDisposition));
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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, CEF_DESTROY, 0, 0);
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aAction := cbaDelay;
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end;
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procedure TChildForm.Chromium1TitleChange(Sender: TObject; const browser: ICefBrowser; const title: ustring);
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begin
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try
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FCriticalSection.Acquire;
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FTitle := title;
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finally
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FCriticalSection.Release;
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PostMessage(Handle, CEF_UPDATECAPTION, 0, 0);
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end;
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end;
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function TChildForm.GetInitialized : boolean;
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begin
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Result := Chromium1.Initialized;
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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.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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if FBrowserWasCreated then
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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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Chromium1.CloseBrowser(True);
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end;
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end
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else
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CanClose := True;
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end;
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procedure TChildForm.FormCreate(Sender: TObject);
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begin
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FCriticalSection := TCriticalSection.Create;
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FBrowserWasCreated := False;
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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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FCriticalSection.Free;
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if FBrowserWasCreated and TMainForm(Owner).HandleAllocated then
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PostMessage(TMainForm(Owner).Handle, CEF_CHILDDESTROYED, 0, 0);
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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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procedure TChildForm.BrowserUpdateCaptionMsg(var aMessage : TMessage);
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begin
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try
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FCriticalSection.Acquire;
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Caption := FTitle;
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finally
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FCriticalSection.Release;
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end;
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end;
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end.
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