mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-11-16 16:25:57 +01:00
77121dc510
- Check that all frames are valid before using them - Added an error page to MiniBrowser.
331 lines
12 KiB
ObjectPascal
331 lines
12 KiB
ObjectPascal
// ************************************************************************
|
|
// ***************************** CEF4Delphi *******************************
|
|
// ************************************************************************
|
|
//
|
|
// CEF4Delphi is based on DCEF3 which uses CEF3 to embed a chromium-based
|
|
// browser in Delphi applications.
|
|
//
|
|
// The original license of DCEF3 still applies to CEF4Delphi.
|
|
//
|
|
// For more information about CEF4Delphi visit :
|
|
// https://www.briskbard.com/index.php?lang=en&pageid=cef
|
|
//
|
|
// Copyright © 2019 Salvador Diaz Fau. All rights reserved.
|
|
//
|
|
// ************************************************************************
|
|
// ************ vvvv Original license and comments below vvvv *************
|
|
// ************************************************************************
|
|
(*
|
|
* Delphi Chromium Embedded 3
|
|
*
|
|
* Usage allowed under the restrictions of the Lesser GNU General Public License
|
|
* or alternatively the restrictions of the Mozilla Public License 1.1
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
|
|
* the specific language governing rights and limitations under the License.
|
|
*
|
|
* Unit owner : Henri Gourvest <hgourvest@gmail.com>
|
|
* Web site : http://www.progdigy.com
|
|
* Repository : http://code.google.com/p/delphichromiumembedded/
|
|
* Group : http://groups.google.com/group/delphichromiumembedded
|
|
*
|
|
* Embarcadero Technologies, Inc is not permitted to use or redistribute
|
|
* this source code without explicit permission.
|
|
*
|
|
*)
|
|
|
|
unit uJSExecutingFunctions;
|
|
|
|
{$I cef.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
{$IFDEF DELPHI16_UP}
|
|
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
|
|
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ExtCtrls, Vcl.ComCtrls,
|
|
{$ELSE}
|
|
Windows, Messages, SysUtils, Variants, Classes, Graphics,
|
|
Controls, Forms, Dialogs, StdCtrls, ExtCtrls, ComCtrls,
|
|
{$ENDIF}
|
|
uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFApplication, uCEFTypes,
|
|
uCEFConstants, uCEFv8Value, uCEFWinControl, uCEFSentinel;
|
|
|
|
const
|
|
JSDEMO_CONTEXTMENU_EXECFUNCTION = MENU_ID_USER_FIRST + 1;
|
|
|
|
EXECFUNCTION_MSGNAME = 'execfunction';
|
|
|
|
type
|
|
TJSExecutingFunctionsFrm = class(TForm)
|
|
NavControlPnl: TPanel;
|
|
Edit1: TEdit;
|
|
GoBtn: TButton;
|
|
CEFWindowParent1: TCEFWindowParent;
|
|
Chromium1: TChromium;
|
|
Timer1: TTimer;
|
|
CEFSentinel1: TCEFSentinel;
|
|
procedure FormShow(Sender: TObject);
|
|
procedure GoBtnClick(Sender: TObject);
|
|
procedure Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
|
|
procedure Timer1Timer(Sender: TObject);
|
|
procedure Chromium1BeforeContextMenu(Sender: TObject;
|
|
const browser: ICefBrowser; const frame: ICefFrame;
|
|
const params: ICefContextMenuParams; const model: ICefMenuModel);
|
|
procedure Chromium1ContextMenuCommand(Sender: TObject;
|
|
const browser: ICefBrowser; const frame: ICefFrame;
|
|
const params: ICefContextMenuParams; commandId: Integer;
|
|
eventFlags: Cardinal; out Result: Boolean);
|
|
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);
|
|
procedure FormDestroy(Sender: TObject);
|
|
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
|
|
procedure FormCreate(Sender: TObject);
|
|
procedure Chromium1Close(Sender: TObject; const browser: ICefBrowser;
|
|
var aAction : TCefCloseBrowserAction);
|
|
procedure Chromium1BeforeClose(Sender: TObject;
|
|
const browser: ICefBrowser);
|
|
procedure CEFSentinel1Close(Sender: TObject);
|
|
protected
|
|
// Variables to control when can we destroy the form safely
|
|
FCanClose : boolean; // Set to True in TChromium.OnBeforeClose
|
|
FClosing : boolean; // Set to True in the CloseQuery event.
|
|
|
|
procedure BrowserCreatedMsg(var aMessage : TMessage); message CEF_AFTERCREATED;
|
|
procedure BrowserDestroyMsg(var aMessage : TMessage); message CEF_DESTROY;
|
|
procedure WMMove(var aMessage : TWMMove); message WM_MOVE;
|
|
procedure WMMoving(var aMessage : TMessage); message WM_MOVING;
|
|
procedure WMEnterMenuLoop(var aMessage: TMessage); message WM_ENTERMENULOOP;
|
|
procedure WMExitMenuLoop(var aMessage: TMessage); message WM_EXITMENULOOP;
|
|
public
|
|
{ Public declarations }
|
|
end;
|
|
|
|
var
|
|
JSExecutingFunctionsFrm : TJSExecutingFunctionsFrm;
|
|
GlobalCallbackFunc : ICefv8Value = nil;
|
|
GlobalCallbackContext : ICefv8Context = nil;
|
|
|
|
procedure CreateGlobalCEFApp;
|
|
|
|
implementation
|
|
|
|
{$R *.dfm}
|
|
|
|
// The CEF3 document describing JavaScript integration is here :
|
|
// https://bitbucket.org/chromiumembedded/cef/wiki/JavaScriptIntegration.md
|
|
|
|
// The HTML file in this demo has a button that registers 'myfunc()' using
|
|
// a "register" function we previously binded to the window in the
|
|
// GlobalCEFApp.OnContextCreated event.
|
|
|
|
// After registering the function you can right-click over the demo and
|
|
// select "Execute registered JS function" to execute the function.
|
|
|
|
// This will send a process message to the "render" where the function can
|
|
// be executed.
|
|
|
|
// Destruction steps
|
|
// =================
|
|
// 1. FormCloseQuery sets CanClose to FALSE calls TChromium.CloseBrowser which triggers the TChromium.OnClose event.
|
|
// 2. TChromium.OnClose sends a CEFBROWSER_DESTROY message to destroy CEFWindowParent1 in the main thread, which triggers the TChromium.OnBeforeClose event.
|
|
// 3. TChromium.OnBeforeClose calls TCEFSentinel.Start, which will trigger TCEFSentinel.OnClose when the renderer processes are closed.
|
|
// 4. TCEFSentinel.OnClose sets FCanClose := True and sends WM_CLOSE to the form.
|
|
|
|
uses
|
|
uCEFProcessMessage, uMyV8Handler;
|
|
|
|
procedure GlobalCEFApp_OnContextCreated(const browser: ICefBrowser; const frame: ICefFrame; const context: ICefv8Context);
|
|
var
|
|
TempHandler : ICefv8Handler;
|
|
TempFunction : ICefv8Value;
|
|
begin
|
|
TempHandler := TMyV8Handler.Create;
|
|
TempFunction := TCefv8ValueRef.NewFunction('register', TempHandler);
|
|
|
|
context.Global.SetValueByKey('register', TempFunction, V8_PROPERTY_ATTRIBUTE_NONE);
|
|
end;
|
|
|
|
procedure GlobalCEFApp_OnProcessMessageReceived(const browser : ICefBrowser;
|
|
const frame : ICefFrame;
|
|
sourceProcess : TCefProcessId;
|
|
const aMessage : ICefProcessMessage;
|
|
var aHandled : boolean);
|
|
var
|
|
arguments: TCefv8ValueArray;
|
|
begin
|
|
if (aMessage.name = EXECFUNCTION_MSGNAME) then
|
|
begin
|
|
if (GlobalCallbackFunc <> nil) then
|
|
GlobalCallbackFunc.ExecuteFunctionWithContext(GlobalCallbackContext, nil, arguments);
|
|
|
|
aHandled := True;
|
|
end
|
|
else
|
|
aHandled := False;
|
|
end;
|
|
|
|
procedure CreateGlobalCEFApp;
|
|
begin
|
|
GlobalCEFApp := TCefApplication.Create;
|
|
GlobalCEFApp.OnContextCreated := GlobalCEFApp_OnContextCreated;
|
|
GlobalCEFApp.OnProcessMessageReceived := GlobalCEFApp_OnProcessMessageReceived;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.GoBtnClick(Sender: TObject);
|
|
begin
|
|
Chromium1.LoadURL(Edit1.Text);
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.CEFSentinel1Close(Sender: TObject);
|
|
begin
|
|
FCanClose := True;
|
|
PostMessage(Handle, WM_CLOSE, 0, 0);
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
|
|
begin
|
|
PostMessage(Handle, CEF_AFTERCREATED, 0, 0);
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.Chromium1BeforeClose(Sender: TObject;
|
|
const browser: ICefBrowser);
|
|
begin
|
|
CEFSentinel1.Start;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.Chromium1BeforeContextMenu(
|
|
Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame;
|
|
const params: ICefContextMenuParams; const model: ICefMenuModel);
|
|
begin
|
|
model.AddSeparator;
|
|
model.AddItem(JSDEMO_CONTEXTMENU_EXECFUNCTION, 'Execute registered JS function');
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.Chromium1BeforePopup(Sender: TObject;
|
|
const browser: ICefBrowser; const frame: ICefFrame; const targetUrl,
|
|
targetFrameName: ustring; targetDisposition: TCefWindowOpenDisposition;
|
|
userGesture: Boolean; const popupFeatures: TCefPopupFeatures;
|
|
var windowInfo: TCefWindowInfo; var client: ICefClient;
|
|
var settings: TCefBrowserSettings;
|
|
var extra_info: ICefDictionaryValue;
|
|
var noJavascriptAccess: Boolean;
|
|
var Result: Boolean);
|
|
begin
|
|
// For simplicity, this demo blocks all popup windows and new tabs
|
|
Result := (targetDisposition in [WOD_NEW_FOREGROUND_TAB, WOD_NEW_BACKGROUND_TAB, WOD_NEW_POPUP, WOD_NEW_WINDOW]);
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.Chromium1Close(Sender: TObject; const browser: ICefBrowser; var aAction : TCefCloseBrowserAction);
|
|
begin
|
|
PostMessage(Handle, CEF_DESTROY, 0, 0);
|
|
aAction := cbaDelay;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.Chromium1ContextMenuCommand(
|
|
Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame;
|
|
const params: ICefContextMenuParams; commandId: Integer;
|
|
eventFlags: Cardinal; out Result: Boolean);
|
|
var
|
|
TempMsg : ICefProcessMessage;
|
|
begin
|
|
Result := False;
|
|
|
|
case commandId of
|
|
JSDEMO_CONTEXTMENU_EXECFUNCTION :
|
|
begin
|
|
TempMsg := TCefProcessMessageRef.New(EXECFUNCTION_MSGNAME);
|
|
Chromium1.SendProcessMessage(PID_RENDERER, TempMsg);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.FormCloseQuery(Sender: TObject;
|
|
var CanClose: Boolean);
|
|
begin
|
|
CanClose := FCanClose;
|
|
|
|
if not(FClosing) then
|
|
begin
|
|
FClosing := True;
|
|
Visible := False;
|
|
Chromium1.CloseBrowser(True);
|
|
end;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.FormCreate(Sender: TObject);
|
|
begin
|
|
FCanClose := False;
|
|
FClosing := False;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.FormDestroy(Sender: TObject);
|
|
begin
|
|
GlobalCallbackFunc := nil;
|
|
GlobalCallbackContext := nil;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.FormShow(Sender: TObject);
|
|
begin
|
|
// GlobalCEFApp.GlobalContextInitialized has to be TRUE before creating any browser
|
|
// If it's not initialized yet, we use a simple timer to create the browser later.
|
|
if not(Chromium1.CreateBrowser(CEFWindowParent1, '')) then Timer1.Enabled := True;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.WMMove(var aMessage : TWMMove);
|
|
begin
|
|
inherited;
|
|
|
|
if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.WMMoving(var aMessage : TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.WMEnterMenuLoop(var aMessage: TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := True;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.WMExitMenuLoop(var aMessage: TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := False;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.Timer1Timer(Sender: TObject);
|
|
begin
|
|
Timer1.Enabled := False;
|
|
if not(Chromium1.CreateBrowser(CEFWindowParent1, '')) and not(Chromium1.Initialized) then
|
|
Timer1.Enabled := True;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.BrowserCreatedMsg(var aMessage : TMessage);
|
|
begin
|
|
Caption := 'JSExecutingFunctions';
|
|
CEFWindowParent1.UpdateSize;
|
|
NavControlPnl.Enabled := True;
|
|
GoBtn.Click;
|
|
end;
|
|
|
|
procedure TJSExecutingFunctionsFrm.BrowserDestroyMsg(var aMessage : TMessage);
|
|
begin
|
|
CEFWindowParent1.Free;
|
|
end;
|
|
|
|
end.
|