mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-11-16 16:25:57 +01:00
1fa2f43b0c
- Modified CefPostTask and CefPostDelayedTask to return a boolean value. - Added CefCurrentlyOn helper function. - Replaced all "CEF3" mentions by "CEF".
521 lines
16 KiB
ObjectPascal
521 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 © 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 uEditorBrowser;
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{$MODE Delphi}
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{$I cef.inc}
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interface
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uses
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Windows, Messages, SysUtils, Variants, Classes, Graphics,
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Controls, Forms, Dialogs, StdCtrls, ExtCtrls, ToolWin, ComCtrls,
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ImgList,
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uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFConstants, uCEFTypes,
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uCEFWinControl, uCEFSentinel;
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type
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{ TForm1 }
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TForm1 = class(TForm)
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CEFSentinel1: TCEFSentinel;
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Timer1: TTimer;
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Chromium1: TChromium;
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CEFWindowParent1: TCEFWindowParent;
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ToolBar1: TToolBar;
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SaveBtn: TToolButton;
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ImageList1: TImageList;
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Separator1: TToolButton;
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BoldBtn: TToolButton;
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ItalicBtn: TToolButton;
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UnderlineBtn: TToolButton;
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StrikethroughBtn: TToolButton;
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Separator2: TToolButton;
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AlignLeftBtn: TToolButton;
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AlignCenterBtn: TToolButton;
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AlignRightBtn: TToolButton;
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OpenBtn: TToolButton;
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NewBtn: TToolButton;
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OpenDialog1: TOpenDialog;
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SaveDialog1: TSaveDialog;
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Separator3: TToolButton;
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LinkBtn: TToolButton;
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ImageBtn: TToolButton;
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AlignJustifyBtn: TToolButton;
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Separator4: TToolButton;
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UnorderedListBtn: TToolButton;
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OrderedListBtn: TToolButton;
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ColorDialog1: TColorDialog;
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Separator5: TToolButton;
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IndentBtn: TToolButton;
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TextColorBtn: TToolButton;
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FillColorBtn: TToolButton;
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Separator6: TToolButton;
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RemoveFormatBtn: TToolButton;
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OutdentBtn: TToolButton;
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Separator7: TToolButton;
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procedure CEFSentinel1Close(Sender: TObject);
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procedure Timer1Timer(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 Chromium1LoadEnd(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; httpStatusCode: Integer);
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procedure Chromium1TextResultAvailable(Sender: TObject; const aText: ustring);
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procedure BoldBtnClick(Sender: TObject);
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procedure ItalicBtnClick(Sender: TObject);
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procedure UnderlineBtnClick(Sender: TObject);
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procedure StrikethroughBtnClick(Sender: TObject);
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procedure AlignLeftBtnClick(Sender: TObject);
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procedure AlignCenterBtnClick(Sender: TObject);
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procedure AlignRightBtnClick(Sender: TObject);
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procedure SaveBtnClick(Sender: TObject);
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procedure NewBtnClick(Sender: TObject);
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procedure OpenBtnClick(Sender: TObject);
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procedure LinkBtnClick(Sender: TObject);
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procedure ImageBtnClick(Sender: TObject);
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procedure AlignJustifyBtnClick(Sender: TObject);
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procedure UnorderedListBtnClick(Sender: TObject);
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procedure OrderedListBtnClick(Sender: TObject);
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procedure IndentBtnClick(Sender: TObject);
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procedure TextColorBtnClick(Sender: TObject);
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procedure FillColorBtnClick(Sender: TObject);
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procedure RemoveFormatBtnClick(Sender: TObject);
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procedure OutdentBtnClick(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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procedure EnableDesignMode;
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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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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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procedure CreateGlobalCEFApp;
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implementation
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{$R *.lfm}
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uses
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uCEFApplication, uCEFMiscFunctions;
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// This demo shows how to create a simple editor using a browser.
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// It's possible to add many more editor commands available with the JavaScript function called 'execCommand'
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// https://developer.mozilla.org/en-US/docs/Web/API/Document/execCommand
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// There are several TODO comments with some missing features that all editors should have
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// This demo includes some icons from "Material Design Icons", made by Google ( https://github.com/google/material-design-icons )
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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 calls TCEFSentinel.Start, which will trigger TCEFSentinel.OnClose when the renderer processes are closed.
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// 4. TCEFSentinel.OnClose sets FCanClose := True and sends WM_CLOSE to the form.
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procedure CreateGlobalCEFApp;
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begin
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GlobalCEFApp := TCefApplication.Create;
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//GlobalCEFApp.LogFile := 'cef.log';
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//GlobalCEFApp.LogSeverity := LOGSEVERITY_VERBOSE;
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end;
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procedure TForm1.FillColorBtnClick(Sender: TObject);
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var
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TempCode, TempHexColor : string;
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begin
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if ColorDialog1.execute then
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begin
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TempHexColor := '#' + IntToHex(GetRValue(ColorDialog1.Color), 2) +
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IntToHex(GetGValue(ColorDialog1.Color), 2) +
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IntToHex(GetBValue(ColorDialog1.Color), 2);
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TempCode := 'document.execCommand("backColor", false, "' + TempHexColor + '");';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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end;
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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 := 'file:///EditorBrowser.html';
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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.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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CEFSentinel1.Start;
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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.Chromium1LoadEnd(Sender: TObject;
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const browser: ICefBrowser; const frame: ICefFrame;
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httpStatusCode: Integer);
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begin
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if (frame <> nil) and (not(frame.IsValid) or not(frame.isMain)) then exit;
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// Enable the "designMode" for all loaded files to edit them
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EnableDesignMode;
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end;
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procedure TForm1.Chromium1TextResultAvailable(Sender: TObject; const aText: ustring);
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var
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TempLines : TStringList;
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begin
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// TODO: This function should notify the user if an existing file is replaced
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TempLines := nil;
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SaveDialog1.DefaultExt := '.html';
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SaveDialog1.Filter := 'HTML Files (*.html)|*.HTML';
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if SaveDialog1.Execute then
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try
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try
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TempLines := TStringList.Create;
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TempLines.Text := aText;
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TempLines.SaveToFile(SaveDialog1.FileName);
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except
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on e : exception do
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if CustomExceptionHandler('TForm1.Chromium1TextResultAvailable', e) then raise;
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end;
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finally
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if (TempLines <> nil) then FreeAndNil(TempLines);
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end;
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end;
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procedure TForm1.TextColorBtnClick(Sender: TObject);
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var
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TempCode, TempHexColor : string;
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begin
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if ColorDialog1.execute then
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begin
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TempHexColor := '#' + IntToHex(GetRValue(ColorDialog1.Color), 2) +
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IntToHex(GetGValue(ColorDialog1.Color), 2) +
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IntToHex(GetBValue(ColorDialog1.Color), 2);
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TempCode := 'document.execCommand("foreColor", false, "' + TempHexColor + '");';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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end;
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procedure TForm1.EnableDesignMode;
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var
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TempCode : string;
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begin
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TempCode := 'document.designMode = "on";';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.AlignCenterBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("justifyCenter", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.AlignJustifyBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("justifyFull", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.AlignLeftBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("justifyLeft", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.AlignRightBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("justifyRight", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.BoldBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("bold", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.ImageBtnClick(Sender: TObject);
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var
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TempCode, TempURL : string;
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begin
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// TODO: Replace InputBox
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TempURL := inputbox('Type the URL used in the image', 'URL : ', 'https://www.briskbard.com/images/logo5.png');
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TempCode := 'document.execCommand("insertImage", false, "' + TempURL + '");';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.IndentBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("indent", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.ItalicBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("italic", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.LinkBtnClick(Sender: TObject);
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var
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TempCode, TempURL : string;
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begin
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// TODO: Replace InputBox
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TempURL := inputbox('Type the URL used in the link', 'URL : ', 'https://www.briskbard.com');
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TempCode := 'document.execCommand("createLink", false, "' + TempURL + '");';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.SaveBtnClick(Sender: TObject);
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begin
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Chromium1.RetrieveHTML;
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end;
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procedure TForm1.StrikethroughBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("strikeThrough", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.UnderlineBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("underline", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.UnorderedListBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("insertUnorderedList", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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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 := 'Editor Browser';
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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.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.CEFSentinel1Close(Sender: TObject);
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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.OpenBtnClick(Sender: TObject);
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begin
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OpenDialog1.Filter := 'HTML Files (*.html)|*.HTML';
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if OpenDialog1.Execute then
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Chromium1.LoadURL('file:///' + OpenDialog1.FileName); // TODO: The URL should be encoded
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end;
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procedure TForm1.OrderedListBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("insertOrderedList", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.OutdentBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("outdent", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.RemoveFormatBtnClick(Sender: TObject);
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var
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TempCode : string;
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begin
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TempCode := 'document.execCommand("removeFormat", false, null);';
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Chromium1.ExecuteJavaScript(TempCode, 'about:blank');
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end;
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procedure TForm1.NewBtnClick(Sender: TObject);
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begin
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// TODO: Before clearing the document we should notify the user if the document has unsaved changes
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Chromium1.LoadURL('about:blank');
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EnableDesignMode;
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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;
|
|
end;
|
|
|
|
end.
|