mirror of
https://github.com/salvadordf/CEF4Delphi.git
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468 lines
16 KiB
ObjectPascal
468 lines
16 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 © 2022 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 uMobileBrowser;
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{$I cef.inc}
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interface
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uses
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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.StdCtrls, Vcl.ExtCtrls, Vcl.Mask, Vcl.Samples.Spin,
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uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFConstants, uCEFTypes, uCEFJson,
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uCEFWinControl, uCEFSentinel, uCEFChromiumCore, uCEFDictionaryValue;
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type
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TForm1 = class(TForm)
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Timer1: TTimer;
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Chromium1: TChromium;
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Panel1: TPanel;
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Panel2: TPanel;
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AddressPnl: TPanel;
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AddressEdt: TEdit;
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GoBtn: TButton;
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CEFWindowParent1: TCEFWindowParent;
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Splitter1: TSplitter;
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LogMem: TMemo;
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Panel3: TPanel;
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CanEmulateBtn: TButton;
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ClearDeviceMetricsOverrideBtn: TButton;
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Panel4: TPanel;
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GroupBox1: TGroupBox;
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UserAgentCb: TComboBox;
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OverrideUserAgentBtn: TButton;
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EmulateTouchChk: TCheckBox;
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Panel5: TPanel;
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GroupBox2: TGroupBox;
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Panel6: TPanel;
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Label1: TLabel;
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HeightEdt: TSpinEdit;
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Panel7: TPanel;
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Label2: TLabel;
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WidthEdt: TSpinEdit;
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OverrideDeviceMetricsBtn: TButton;
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Panel8: TPanel;
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Label3: TLabel;
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ScaleEdt: TMaskEdit;
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Panel9: TPanel;
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Label4: TLabel;
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OrientationCb: TComboBox;
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Panel10: TPanel;
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Label5: TLabel;
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AngleEdt: TSpinEdit;
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procedure GoBtnClick(Sender: TObject);
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procedure Timer1Timer(Sender: TObject);
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procedure CanEmulateBtnClick(Sender: TObject);
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procedure OverrideUserAgentBtnClick(Sender: TObject);
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procedure FormShow(Sender: TObject);
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procedure FormCreate(Sender: TObject);
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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 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 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, Result: Boolean);
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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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procedure Chromium1DevToolsMethodResult(Sender: TObject; const browser: ICefBrowser; message_id: Integer; success: Boolean; const result: ICefValue);
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procedure EmulateTouchChkClick(Sender: TObject);
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procedure ClearDeviceMetricsOverrideBtnClick(Sender: TObject);
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procedure OverrideDeviceMetricsBtnClick(Sender: TObject);
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protected
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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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// You have to handle this two messages to call NotifyMoveOrResizeStarted or some page elements will be misaligned.
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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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// You also have to handle these two messages to set GlobalCEFApp.OsmodalLoop
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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 BrowserCreatedMsg(var aMessage : TMessage); message CEF_AFTERCREATED;
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procedure BrowserDestroyMsg(var aMessage : TMessage); message CEF_DESTROY;
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procedure HandleSetUserAgentResult(aSuccess : boolean; const aResult: ICefValue);
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procedure HandleSetTouchEmulationEnabledResult(aSuccess : boolean; const aResult: ICefValue);
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procedure HandleCanEmulateResult(aSuccess : boolean; const aResult: ICefValue);
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procedure HandleClearDeviceMetricsOverrideResult(aSuccess : boolean; const aResult: ICefValue);
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procedure HandleSetDeviceMetricsOverrideResult(aSuccess : boolean; const aResult: ICefValue);
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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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Form1: TForm1;
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implementation
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{$R *.dfm}
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uses
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uCEFApplication, uCefMiscFunctions;
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// This demo allows you to emulate a mobile browser using the "Emulation" namespace of the DevTools.
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// It's necesary to reload the browser after using the controls in the right panel.
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// This demo uses a TChromium and a TCEFWindowParent
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// Destruction steps
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// =================
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// 1. FormCloseQuery sets CanClose to FALSE calls TChromium.CloseBrowser which triggers the TChromium.OnClose event.
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// 2. TChromium.OnClose sends a CEFBROWSER_DESTROY message to destroy CEFWindowParent1 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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const
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DEVTOOLS_SETUSERAGENTOVERRIDE_MSGID = 1;
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DEVTOOLS_SETTOUCHEMULATIONENABLED_MSGID = 2;
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DEVTOOLS_CANEMULATE_MSGID = 3;
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DEVTOOLS_CLEARDEVICEMETRICSOVERRIDE_MSGID = 4;
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DEVTOOLS_SETDEVICEMETRICSOVERRIDE_MSGID = 5;
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procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
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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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procedure TForm1.FormCreate(Sender: TObject);
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begin
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FCanClose := False;
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FClosing := False;
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Chromium1.DefaultURL := AddressEdt.Text;
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end;
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procedure TForm1.FormShow(Sender: TObject);
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begin
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// You *MUST* call CreateBrowser to create and initialize the browser.
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// This will trigger the AfterCreated event when the browser is fully
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// initialized and ready to receive commands.
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// GlobalCEFApp.GlobalContextInitialized has to be TRUE before creating any browser
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// If it's not initialized yet, we use a simple timer to create the browser later.
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if not(Chromium1.CreateBrowser(CEFWindowParent1)) then Timer1.Enabled := True;
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end;
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procedure TForm1.CanEmulateBtnClick(Sender: TObject);
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begin
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Chromium1.ExecuteDevToolsMethod(DEVTOOLS_CANEMULATE_MSGID, 'Emulation.canEmulate', nil);
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end;
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procedure TForm1.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
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begin
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// Now the browser is fully initialized we can send a message to the main form to load the initial web page.
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PostMessage(Handle, CEF_AFTERCREATED, 0, 0);
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end;
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procedure TForm1.Chromium1BeforeClose(Sender: TObject;
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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 TForm1.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; var extra_info: ICefDictionaryValue;
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var noJavascriptAccess, 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 TForm1.Chromium1Close(Sender: TObject;
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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 TForm1.Chromium1DevToolsMethodResult(Sender: TObject;
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const browser: ICefBrowser; message_id: Integer; success: Boolean;
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const result: ICefValue);
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begin
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case message_id of
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DEVTOOLS_SETUSERAGENTOVERRIDE_MSGID : HandleSetUserAgentResult(success, result);
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DEVTOOLS_SETTOUCHEMULATIONENABLED_MSGID : HandleSetTouchEmulationEnabledResult(success, result);
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DEVTOOLS_CANEMULATE_MSGID : HandleCanEmulateResult(success, result);
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DEVTOOLS_CLEARDEVICEMETRICSOVERRIDE_MSGID : HandleClearDeviceMetricsOverrideResult(success, result);
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DEVTOOLS_SETDEVICEMETRICSOVERRIDE_MSGID : HandleSetDeviceMetricsOverrideResult(success, result);
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end;
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end;
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procedure TForm1.Chromium1OpenUrlFromTab(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame;
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const targetUrl: ustring; targetDisposition: TCefWindowOpenDisposition;
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userGesture: Boolean; out 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 TForm1.ClearDeviceMetricsOverrideBtnClick(Sender: TObject);
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begin
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Chromium1.ExecuteDevToolsMethod(DEVTOOLS_CLEARDEVICEMETRICSOVERRIDE_MSGID, 'Emulation.clearDeviceMetricsOverride', nil);
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end;
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procedure TForm1.EmulateTouchChkClick(Sender: TObject);
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var
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TempParams : ICefDictionaryValue;
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begin
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try
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TempParams := TCefDictionaryValueRef.New;
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TempParams.SetBool('enabled', EmulateTouchChk.Checked);
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if EmulateTouchChk.Checked then
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TempParams.SetInt('maxTouchPoints', 2);
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Chromium1.ExecuteDevToolsMethod(DEVTOOLS_SETTOUCHEMULATIONENABLED_MSGID, 'Emulation.setTouchEmulationEnabled', TempParams);
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finally
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TempParams := nil;
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end;
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end;
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procedure TForm1.BrowserCreatedMsg(var aMessage : TMessage);
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begin
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Caption := 'Mobile Browser';
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AddressPnl.Enabled := True;
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end;
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procedure TForm1.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 TForm1.GoBtnClick(Sender: TObject);
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begin
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// This will load the URL in the edit box
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Chromium1.LoadURL(AddressEdt.Text);
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end;
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procedure TForm1.OverrideDeviceMetricsBtnClick(Sender: TObject);
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var
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TempParams, TempDict : ICefDictionaryValue;
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TempFormatSettings : TFormatSettings;
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TempOrientation : string;
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begin
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try
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TempParams := TCefDictionaryValueRef.New;
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TempParams.SetInt('width', WidthEdt.Value);
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TempParams.SetInt('height', HeightEdt.Value);
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TempFormatSettings := TFormatSettings.Create;
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TempFormatSettings.DecimalSeparator := '.';
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TempParams.SetDouble('deviceScaleFactor', StrToFloat(ScaleEdt.Text, TempFormatSettings));
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TempParams.SetBool('mobile', True);
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case OrientationCb.ItemIndex of
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0 : TempOrientation := 'portraitPrimary';
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1 : TempOrientation := 'portraitSecondary';
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2 : TempOrientation := 'landscapePrimary';
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else TempOrientation := 'landscapeSecondary';
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end;
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TempDict := TCefDictionaryValueRef.New;
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TempDict.SetString('type', TempOrientation);
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TempDict.SetInt('angle', AngleEdt.Value);
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TempParams.SetDictionary('screenOrientation', TempDict);
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Chromium1.ExecuteDevToolsMethod(DEVTOOLS_SETDEVICEMETRICSOVERRIDE_MSGID, 'Emulation.setDeviceMetricsOverride', TempParams);
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finally
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TempDict := nil;
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TempParams := nil;
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end;
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end;
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procedure TForm1.OverrideUserAgentBtnClick(Sender: TObject);
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var
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TempParams : ICefDictionaryValue;
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begin
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try
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TempParams := TCefDictionaryValueRef.New;
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TempParams.SetString('userAgent', UserAgentCb.Text);
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Chromium1.ExecuteDevToolsMethod(DEVTOOLS_SETUSERAGENTOVERRIDE_MSGID, 'Emulation.setUserAgentOverride', TempParams);
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finally
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TempParams := nil;
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end;
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end;
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procedure TForm1.Timer1Timer(Sender: TObject);
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begin
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Timer1.Enabled := False;
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if not(Chromium1.CreateBrowser(CEFWindowParent1)) and not(Chromium1.Initialized) then
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Timer1.Enabled := True;
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end;
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procedure TForm1.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 TForm1.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 TForm1.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 TForm1.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 TForm1.HandleSetUserAgentResult(aSuccess : boolean; const aResult: ICefValue);
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begin
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if aSuccess and (aResult <> nil) then
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TThread.ForceQueue(nil,
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procedure
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begin
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LogMem.Lines.Add('Successful SetUserAgentOverride');
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end)
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else
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TThread.ForceQueue(nil,
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procedure
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begin
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LogMem.Lines.Add('Unsuccessful SetUserAgentOverride');
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end);
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end;
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procedure TForm1.HandleSetTouchEmulationEnabledResult(aSuccess : boolean; const aResult: ICefValue);
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begin
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if aSuccess and (aResult <> nil) then
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TThread.ForceQueue(nil,
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procedure
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begin
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LogMem.Lines.Add('Successful SetTouchEmulationEnabled');
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end)
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else
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TThread.ForceQueue(nil,
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procedure
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begin
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LogMem.Lines.Add('Unsuccessful SetTouchEmulationEnabled');
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end);
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end;
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procedure TForm1.HandleCanEmulateResult(aSuccess : boolean; const aResult: ICefValue);
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var
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TempRsltDict : ICefDictionaryValue;
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TempResult : boolean;
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begin
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if aSuccess and (aResult <> nil) then
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begin
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TempRsltDict := aResult.GetDictionary;
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if TCEFJson.ReadBoolean(TempRsltDict, 'result', TempResult) and TempResult then
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TThread.ForceQueue(nil,
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procedure
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begin
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LogMem.Lines.Add('Successful CanEmulate. Emulation is supported.');
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end)
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else
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TThread.ForceQueue(nil,
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procedure
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begin
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LogMem.Lines.Add('Successful CanEmulate. Emulation is not supported.');
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end);
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end
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else
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TThread.ForceQueue(nil,
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procedure
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begin
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LogMem.Lines.Add('Unsuccessful CanEmulate');
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end);
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end;
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procedure TForm1.HandleClearDeviceMetricsOverrideResult(aSuccess : boolean; const aResult: ICefValue);
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begin
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if aSuccess and (aResult <> nil) then
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TThread.ForceQueue(nil,
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procedure
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begin
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LogMem.Lines.Add('Successful ClearDeviceMetricsOverride');
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end)
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else
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TThread.ForceQueue(nil,
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procedure
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begin
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LogMem.Lines.Add('Unsuccessful ClearDeviceMetricsOverride');
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end);
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end;
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procedure TForm1.HandleSetDeviceMetricsOverrideResult(aSuccess : boolean; const aResult: ICefValue);
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begin
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if aSuccess and (aResult <> nil) then
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TThread.ForceQueue(nil,
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procedure
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begin
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LogMem.Lines.Add('Successful SetDeviceMetricsOverride');
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end)
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else
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TThread.ForceQueue(nil,
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procedure
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begin
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LogMem.Lines.Add('Unsuccessful SetDeviceMetricsOverride');
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end);
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end;
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end.
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