mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-11-16 16:25:57 +01:00
519 lines
16 KiB
ObjectPascal
519 lines
16 KiB
ObjectPascal
// ************************************************************************
|
|
// ***************************** CEF4Delphi *******************************
|
|
// ************************************************************************
|
|
//
|
|
// CEF4Delphi is based on DCEF3 which uses CEF 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 © 2022 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 uEditorBrowser;
|
|
|
|
{$MODE Delphi}
|
|
|
|
{$I cef.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
Windows, Messages, SysUtils, Variants, Classes, Graphics,
|
|
Controls, Forms, Dialogs, StdCtrls, ExtCtrls, ToolWin, ComCtrls,
|
|
ImgList,
|
|
uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFConstants, uCEFTypes,
|
|
uCEFWinControl, uCEFSentinel;
|
|
|
|
type
|
|
|
|
{ TForm1 }
|
|
|
|
TForm1 = class(TForm)
|
|
Timer1: TTimer;
|
|
Chromium1: TChromium;
|
|
CEFWindowParent1: TCEFWindowParent;
|
|
ToolBar1: TToolBar;
|
|
SaveBtn: TToolButton;
|
|
ImageList1: TImageList;
|
|
Separator1: TToolButton;
|
|
BoldBtn: TToolButton;
|
|
ItalicBtn: TToolButton;
|
|
UnderlineBtn: TToolButton;
|
|
StrikethroughBtn: TToolButton;
|
|
Separator2: TToolButton;
|
|
AlignLeftBtn: TToolButton;
|
|
AlignCenterBtn: TToolButton;
|
|
AlignRightBtn: TToolButton;
|
|
OpenBtn: TToolButton;
|
|
NewBtn: TToolButton;
|
|
OpenDialog1: TOpenDialog;
|
|
SaveDialog1: TSaveDialog;
|
|
Separator3: TToolButton;
|
|
LinkBtn: TToolButton;
|
|
ImageBtn: TToolButton;
|
|
AlignJustifyBtn: TToolButton;
|
|
Separator4: TToolButton;
|
|
UnorderedListBtn: TToolButton;
|
|
OrderedListBtn: TToolButton;
|
|
ColorDialog1: TColorDialog;
|
|
Separator5: TToolButton;
|
|
IndentBtn: TToolButton;
|
|
TextColorBtn: TToolButton;
|
|
FillColorBtn: TToolButton;
|
|
Separator6: TToolButton;
|
|
RemoveFormatBtn: TToolButton;
|
|
OutdentBtn: TToolButton;
|
|
Separator7: TToolButton;
|
|
|
|
procedure CEFSentinel1Close(Sender: TObject);
|
|
procedure Timer1Timer(Sender: TObject);
|
|
|
|
procedure FormShow(Sender: TObject);
|
|
procedure FormCreate(Sender: TObject);
|
|
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
|
|
|
|
procedure Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
|
|
procedure Chromium1Close(Sender: TObject; const browser: ICefBrowser; var aAction : TCefCloseBrowserAction);
|
|
procedure Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
|
|
procedure Chromium1LoadEnd(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; httpStatusCode: Integer);
|
|
procedure Chromium1TextResultAvailable(Sender: TObject; const aText: ustring);
|
|
|
|
procedure BoldBtnClick(Sender: TObject);
|
|
procedure ItalicBtnClick(Sender: TObject);
|
|
procedure UnderlineBtnClick(Sender: TObject);
|
|
procedure StrikethroughBtnClick(Sender: TObject);
|
|
procedure AlignLeftBtnClick(Sender: TObject);
|
|
procedure AlignCenterBtnClick(Sender: TObject);
|
|
procedure AlignRightBtnClick(Sender: TObject);
|
|
procedure SaveBtnClick(Sender: TObject);
|
|
procedure NewBtnClick(Sender: TObject);
|
|
procedure OpenBtnClick(Sender: TObject);
|
|
procedure LinkBtnClick(Sender: TObject);
|
|
procedure ImageBtnClick(Sender: TObject);
|
|
procedure AlignJustifyBtnClick(Sender: TObject);
|
|
procedure UnorderedListBtnClick(Sender: TObject);
|
|
procedure OrderedListBtnClick(Sender: TObject);
|
|
procedure IndentBtnClick(Sender: TObject);
|
|
procedure TextColorBtnClick(Sender: TObject);
|
|
procedure FillColorBtnClick(Sender: TObject);
|
|
procedure RemoveFormatBtnClick(Sender: TObject);
|
|
procedure OutdentBtnClick(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 EnableDesignMode;
|
|
|
|
// You have to handle this two messages to call NotifyMoveOrResizeStarted or some page elements will be misaligned.
|
|
procedure WMMove(var aMessage : TWMMove); message WM_MOVE;
|
|
procedure WMMoving(var aMessage : TMessage); message WM_MOVING;
|
|
// You also have to handle these two messages to set GlobalCEFApp.OsmodalLoop
|
|
procedure WMEnterMenuLoop(var aMessage: TMessage); message WM_ENTERMENULOOP;
|
|
procedure WMExitMenuLoop(var aMessage: TMessage); message WM_EXITMENULOOP;
|
|
|
|
procedure BrowserCreatedMsg(var aMessage : TMessage); message CEF_AFTERCREATED;
|
|
procedure BrowserDestroyMsg(var aMessage : TMessage); message CEF_DESTROY;
|
|
public
|
|
{ Public declarations }
|
|
end;
|
|
|
|
var
|
|
Form1: TForm1;
|
|
|
|
procedure CreateGlobalCEFApp;
|
|
|
|
implementation
|
|
|
|
{$R *.lfm}
|
|
|
|
uses
|
|
uCEFApplication, uCEFMiscFunctions;
|
|
|
|
// This demo shows how to create a simple editor using a browser.
|
|
|
|
// It's possible to add many more editor commands available with the JavaScript function called 'execCommand'
|
|
// https://developer.mozilla.org/en-US/docs/Web/API/Document/execCommand
|
|
|
|
// There are several TODO comments with some missing features that all editors should have
|
|
|
|
// This demo includes some icons from "Material Design Icons", made by Google ( https://github.com/google/material-design-icons )
|
|
|
|
// 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 sets FCanClose := True and sends WM_CLOSE to the form.
|
|
|
|
procedure CreateGlobalCEFApp;
|
|
begin
|
|
GlobalCEFApp := TCefApplication.Create;
|
|
//GlobalCEFApp.LogFile := 'cef.log';
|
|
//GlobalCEFApp.LogSeverity := LOGSEVERITY_VERBOSE;
|
|
end;
|
|
|
|
procedure TForm1.FillColorBtnClick(Sender: TObject);
|
|
var
|
|
TempCode, TempHexColor : string;
|
|
begin
|
|
if ColorDialog1.execute then
|
|
begin
|
|
TempHexColor := '#' + IntToHex(GetRValue(ColorDialog1.Color), 2) +
|
|
IntToHex(GetGValue(ColorDialog1.Color), 2) +
|
|
IntToHex(GetBValue(ColorDialog1.Color), 2);
|
|
|
|
TempCode := 'document.execCommand("backColor", false, "' + TempHexColor + '");';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
end;
|
|
|
|
procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
|
|
begin
|
|
CanClose := FCanClose;
|
|
|
|
if not(FClosing) then
|
|
begin
|
|
FClosing := True;
|
|
Visible := False;
|
|
Chromium1.CloseBrowser(True);
|
|
end;
|
|
end;
|
|
|
|
procedure TForm1.FormCreate(Sender: TObject);
|
|
begin
|
|
FCanClose := False;
|
|
FClosing := False;
|
|
|
|
Chromium1.DefaultURL := 'file:///EditorBrowser.html';
|
|
end;
|
|
|
|
procedure TForm1.FormShow(Sender: TObject);
|
|
begin
|
|
// You *MUST* call CreateBrowser to create and initialize the browser.
|
|
// This will trigger the AfterCreated event when the browser is fully
|
|
// initialized and ready to receive commands.
|
|
|
|
// 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 TForm1.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
|
|
begin
|
|
// Now the browser is fully initialized we can send a message to the main form to load the initial web page.
|
|
PostMessage(Handle, CEF_AFTERCREATED, 0, 0);
|
|
end;
|
|
|
|
procedure TForm1.Chromium1BeforeClose(Sender: TObject;
|
|
const browser: ICefBrowser);
|
|
begin
|
|
FCanClose := True;
|
|
PostMessage(Handle, WM_CLOSE, 0, 0);
|
|
end;
|
|
|
|
procedure TForm1.Chromium1Close(Sender: TObject;
|
|
const browser: ICefBrowser; var aAction : TCefCloseBrowserAction);
|
|
begin
|
|
PostMessage(Handle, CEF_DESTROY, 0, 0);
|
|
aAction := cbaDelay;
|
|
end;
|
|
|
|
procedure TForm1.Chromium1LoadEnd(Sender: TObject;
|
|
const browser: ICefBrowser; const frame: ICefFrame;
|
|
httpStatusCode: Integer);
|
|
begin
|
|
if (frame <> nil) and (not(frame.IsValid) or not(frame.isMain)) then exit;
|
|
|
|
// Enable the "designMode" for all loaded files to edit them
|
|
EnableDesignMode;
|
|
end;
|
|
|
|
procedure TForm1.Chromium1TextResultAvailable(Sender: TObject; const aText: ustring);
|
|
var
|
|
TempLines : TStringList;
|
|
begin
|
|
// TODO: This function should notify the user if an existing file is replaced
|
|
|
|
TempLines := nil;
|
|
SaveDialog1.DefaultExt := '.html';
|
|
SaveDialog1.Filter := 'HTML Files (*.html)|*.HTML';
|
|
|
|
if SaveDialog1.Execute then
|
|
try
|
|
try
|
|
TempLines := TStringList.Create;
|
|
TempLines.Text := aText;
|
|
TempLines.SaveToFile(SaveDialog1.FileName);
|
|
except
|
|
on e : exception do
|
|
if CustomExceptionHandler('TForm1.Chromium1TextResultAvailable', e) then raise;
|
|
end;
|
|
finally
|
|
if (TempLines <> nil) then FreeAndNil(TempLines);
|
|
end;
|
|
end;
|
|
|
|
procedure TForm1.TextColorBtnClick(Sender: TObject);
|
|
var
|
|
TempCode, TempHexColor : string;
|
|
begin
|
|
if ColorDialog1.execute then
|
|
begin
|
|
TempHexColor := '#' + IntToHex(GetRValue(ColorDialog1.Color), 2) +
|
|
IntToHex(GetGValue(ColorDialog1.Color), 2) +
|
|
IntToHex(GetBValue(ColorDialog1.Color), 2);
|
|
|
|
TempCode := 'document.execCommand("foreColor", false, "' + TempHexColor + '");';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
end;
|
|
|
|
procedure TForm1.EnableDesignMode;
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.designMode = "on";';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.AlignCenterBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("justifyCenter", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.AlignJustifyBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("justifyFull", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.AlignLeftBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("justifyLeft", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.AlignRightBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("justifyRight", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.BoldBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("bold", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.ImageBtnClick(Sender: TObject);
|
|
var
|
|
TempCode, TempURL : string;
|
|
begin
|
|
// TODO: Replace InputBox
|
|
TempURL := inputbox('Type the URL used in the image', 'URL : ', 'https://www.briskbard.com/images/logo5.png');
|
|
TempCode := 'document.execCommand("insertImage", false, "' + TempURL + '");';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.IndentBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("indent", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.ItalicBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("italic", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.LinkBtnClick(Sender: TObject);
|
|
var
|
|
TempCode, TempURL : string;
|
|
begin
|
|
// TODO: Replace InputBox
|
|
TempURL := inputbox('Type the URL used in the link', 'URL : ', 'https://www.briskbard.com');
|
|
TempCode := 'document.execCommand("createLink", false, "' + TempURL + '");';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.SaveBtnClick(Sender: TObject);
|
|
begin
|
|
Chromium1.RetrieveHTML;
|
|
end;
|
|
|
|
procedure TForm1.StrikethroughBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("strikeThrough", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.UnderlineBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("underline", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.UnorderedListBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("insertUnorderedList", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.BrowserCreatedMsg(var aMessage : TMessage);
|
|
begin
|
|
Caption := 'Editor Browser';
|
|
end;
|
|
|
|
procedure TForm1.BrowserDestroyMsg(var aMessage : TMessage);
|
|
begin
|
|
CEFWindowParent1.Free;
|
|
end;
|
|
|
|
procedure TForm1.Timer1Timer(Sender: TObject);
|
|
begin
|
|
Timer1.Enabled := False;
|
|
if not(Chromium1.CreateBrowser(CEFWindowParent1)) and not(Chromium1.Initialized) then
|
|
Timer1.Enabled := True;
|
|
end;
|
|
|
|
procedure TForm1.CEFSentinel1Close(Sender: TObject);
|
|
begin
|
|
|
|
end;
|
|
|
|
procedure TForm1.OpenBtnClick(Sender: TObject);
|
|
begin
|
|
OpenDialog1.Filter := 'HTML Files (*.html)|*.HTML';
|
|
|
|
if OpenDialog1.Execute then
|
|
Chromium1.LoadURL('file:///' + OpenDialog1.FileName); // TODO: The URL should be encoded
|
|
end;
|
|
|
|
procedure TForm1.OrderedListBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("insertOrderedList", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.OutdentBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("outdent", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.RemoveFormatBtnClick(Sender: TObject);
|
|
var
|
|
TempCode : string;
|
|
begin
|
|
TempCode := 'document.execCommand("removeFormat", false, null);';
|
|
|
|
Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
|
|
end;
|
|
|
|
procedure TForm1.NewBtnClick(Sender: TObject);
|
|
begin
|
|
// TODO: Before clearing the document we should notify the user if the document has unsaved changes
|
|
Chromium1.LoadURL('about:blank');
|
|
EnableDesignMode;
|
|
end;
|
|
|
|
procedure TForm1.WMMove(var aMessage : TWMMove);
|
|
begin
|
|
inherited;
|
|
|
|
if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
|
|
end;
|
|
|
|
procedure TForm1.WMMoving(var aMessage : TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
|
|
end;
|
|
|
|
procedure TForm1.WMEnterMenuLoop(var aMessage: TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := True;
|
|
end;
|
|
|
|
procedure TForm1.WMExitMenuLoop(var aMessage: TMessage);
|
|
begin
|
|
inherited;
|
|
|
|
if (aMessage.wParam = 0) and (GlobalCEFApp <> nil) then GlobalCEFApp.OsmodalLoop := False;
|
|
end;
|
|
|
|
end.
|