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CEF4Delphi/demos/MiniBrowser/uMiniBrowser.pas
Salvador Díaz Fau 7f75c50c0b PostDataInspector demo
2017-08-22 18:35:04 +02:00

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// ************************************************************************
// ***************************** 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 © 2017 Salvador Díaz 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 uMiniBrowser;
{$I cef.inc}
interface
uses
{$IFDEF DELPHI16_UP}
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Menus,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ExtCtrls, System.Types, Vcl.ComCtrls, Vcl.ClipBrd,
System.UITypes, Vcl.AppEvnts,
{$ELSE}
Windows, Messages, SysUtils, Variants, Classes, Graphics, Menus,
Controls, Forms, Dialogs, StdCtrls, ExtCtrls, Types, ComCtrls, ClipBrd, AppEvnts,
{$ENDIF}
uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFApplication, uCEFTypes, uCEFConstants;
const
MINIBROWSER_CREATED = WM_APP + $100;
MINIBROWSER_SHOWDEVTOOLS = WM_APP + $101;
MINIBROWSER_HIDEDEVTOOLS = WM_APP + $102;
MINIBROWSER_COPYHTML = WM_APP + $103;
MINIBROWSER_SHOWRESPONSE = WM_APP + $104;
MINIBROWSER_HOMEPAGE = 'https://www.google.com';
MINIBROWSER_CONTEXTMENU_SHOWDEVTOOLS = MENU_ID_USER_FIRST + 1;
MINIBROWSER_CONTEXTMENU_HIDEDEVTOOLS = MENU_ID_USER_FIRST + 2;
MINIBROWSER_CONTEXTMENU_COPYHTML = MENU_ID_USER_FIRST + 5;
MINIBROWSER_CONTEXTMENU_JSWRITEDOC = MENU_ID_USER_FIRST + 7;
MINIBROWSER_CONTEXTMENU_JSPRINTDOC = MENU_ID_USER_FIRST + 8;
MINIBROWSER_CONTEXTMENU_SHOWRESPONSE = MENU_ID_USER_FIRST + 9;
type
TMiniBrowserFrm = class(TForm)
NavControlPnl: TPanel;
NavButtonPnl: TPanel;
URLEditPnl: TPanel;
BackBtn: TButton;
ForwardBtn: TButton;
ReloadBtn: TButton;
CEFWindowParent1: TCEFWindowParent;
Chromium1: TChromium;
StopBtn: TButton;
DevTools: TCEFWindowParent;
Splitter1: TSplitter;
StatusBar1: TStatusBar;
URLCbx: TComboBox;
ConfigPnl: TPanel;
ConfigBtn: TButton;
PopupMenu1: TPopupMenu;
DevTools1: TMenuItem;
N1: TMenuItem;
Preferences1: TMenuItem;
GoBtn: TButton;
N2: TMenuItem;
PrintinPDF1: TMenuItem;
Print1: TMenuItem;
N3: TMenuItem;
Zoom1: TMenuItem;
Inczoom1: TMenuItem;
Deczoom1: TMenuItem;
Resetzoom1: TMenuItem;
SaveDialog1: TSaveDialog;
ApplicationEvents1: TApplicationEvents;
OpenDialog1: TOpenDialog;
N4: TMenuItem;
Openfile1: TMenuItem;
procedure FormShow(Sender: TObject);
procedure BackBtnClick(Sender: TObject);
procedure ForwardBtnClick(Sender: TObject);
procedure ReloadBtnClick(Sender: TObject);
procedure Chromium1AfterCreated(Sender: TObject;
const browser: ICefBrowser);
procedure Chromium1LoadingStateChange(Sender: TObject;
const browser: ICefBrowser; isLoading, canGoBack,
canGoForward: Boolean);
procedure Chromium1TitleChange(Sender: TObject;
const browser: ICefBrowser; const title: ustring);
procedure Chromium1AddressChange(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
const url: ustring);
procedure Chromium1BeforeContextMenu(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
const params: ICefContextMenuParams; const model: ICefMenuModel);
procedure Chromium1StatusMessage(Sender: TObject;
const browser: ICefBrowser; const value: ustring);
procedure Chromium1TextResultAvailable(Sender: TObject;
const aText: string);
procedure PopupMenu1Popup(Sender: TObject);
procedure DevTools1Click(Sender: TObject);
procedure Preferences1Click(Sender: TObject);
procedure ConfigBtnClick(Sender: TObject);
procedure GoBtnClick(Sender: TObject);
procedure PrintinPDF1Click(Sender: TObject);
procedure Print1Click(Sender: TObject);
procedure Inczoom1Click(Sender: TObject);
procedure Deczoom1Click(Sender: TObject);
procedure Resetzoom1Click(Sender: TObject);
procedure Chromium1FullScreenModeChange(Sender: TObject;
const browser: ICefBrowser; fullscreen: Boolean);
procedure Chromium1PreKeyEvent(Sender: TObject;
const browser: ICefBrowser; const event: PCefKeyEvent; osEvent: PMsg;
out isKeyboardShortcut, Result: Boolean);
procedure Chromium1KeyEvent(Sender: TObject;
const browser: ICefBrowser; const event: PCefKeyEvent; osEvent: PMsg;
out Result: Boolean);
procedure ApplicationEvents1Message(var Msg: tagMSG;
var Handled: Boolean);
procedure Openfile1Click(Sender: TObject);
procedure Chromium1ContextMenuCommand(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
const params: ICefContextMenuParams; commandId: Integer;
eventFlags: Cardinal; out Result: Boolean);
procedure Chromium1PdfPrintFinished(Sender: TObject;
aResultOK: Boolean);
procedure Chromium1ResourceResponse(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
const request: ICefRequest; const response: ICefResponse;
out Result: Boolean);
protected
FResponse : string;
procedure AddURL(const aURL : string);
procedure ShowDevTools(aPoint : TPoint); overload;
procedure ShowDevTools; overload;
procedure HideDevTools;
procedure HandleKeyUp(const aMsg : TMsg; var aHandled : boolean);
procedure HandleKeyDown(const aMsg : TMsg; var aHandled : boolean);
procedure BrowserCreatedMsg(var aMessage : TMessage); message MINIBROWSER_CREATED;
procedure ShowDevToolsMsg(var aMessage : TMessage); message MINIBROWSER_SHOWDEVTOOLS;
procedure HideDevToolsMsg(var aMessage : TMessage); message MINIBROWSER_HIDEDEVTOOLS;
procedure CopyHTMLMsg(var aMessage : TMessage); message MINIBROWSER_COPYHTML;
procedure ShowResponseMsg(var aMessage : TMessage); message MINIBROWSER_SHOWRESPONSE;
procedure WMMove(var aMessage : TWMMove); message WM_MOVE;
procedure WMMoving(var aMessage : TMessage); message WM_MOVING;
public
procedure ShowStatusText(const aText : string);
end;
var
MiniBrowserFrm : TMiniBrowserFrm;
implementation
{$R *.dfm}
uses
uPreferences;
procedure TMiniBrowserFrm.BackBtnClick(Sender: TObject);
begin
Chromium1.GoBack;
end;
procedure TMiniBrowserFrm.ForwardBtnClick(Sender: TObject);
begin
Chromium1.GoForward;
end;
procedure TMiniBrowserFrm.GoBtnClick(Sender: TObject);
begin
Chromium1.LoadURL(URLCbx.Text);
end;
procedure TMiniBrowserFrm.ReloadBtnClick(Sender: TObject);
begin
Chromium1.Reload;
end;
procedure TMiniBrowserFrm.Resetzoom1Click(Sender: TObject);
begin
Chromium1.ResetZoomStep;
end;
procedure TMiniBrowserFrm.Chromium1AddressChange(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame; const url: ustring);
begin
AddURL(url);
end;
procedure TMiniBrowserFrm.Chromium1AfterCreated(Sender: TObject;
const browser: ICefBrowser);
begin
PostMessage(Handle, MINIBROWSER_CREATED, 0, 0);
end;
procedure TMiniBrowserFrm.Chromium1BeforeContextMenu(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
const params: ICefContextMenuParams; const model: ICefMenuModel);
begin
model.AddSeparator;
model.AddItem(MINIBROWSER_CONTEXTMENU_COPYHTML, 'Copy HTML to clipboard');
model.AddItem(MINIBROWSER_CONTEXTMENU_JSWRITEDOC, 'Modify HTML document');
model.AddItem(MINIBROWSER_CONTEXTMENU_JSPRINTDOC, 'Print using Javascript');
model.AddItem(MINIBROWSER_CONTEXTMENU_SHOWRESPONSE, 'Show last server response');
if DevTools.Visible then
model.AddItem(MINIBROWSER_CONTEXTMENU_HIDEDEVTOOLS, 'Hide DevTools')
else
model.AddItem(MINIBROWSER_CONTEXTMENU_SHOWDEVTOOLS, 'Show DevTools');
end;
procedure TMiniBrowserFrm.Chromium1ContextMenuCommand(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
const params: ICefContextMenuParams; commandId: Integer;
eventFlags: Cardinal; out Result: Boolean);
var
TempParam : WParam;
begin
Result := False;
case commandId of
MINIBROWSER_CONTEXTMENU_HIDEDEVTOOLS :
PostMessage(Handle, MINIBROWSER_HIDEDEVTOOLS, 0, 0);
MINIBROWSER_CONTEXTMENU_SHOWDEVTOOLS :
begin
TempParam := ((params.XCoord and $FFFF) shl 16) or (params.YCoord and $FFFF);
PostMessage(Handle, MINIBROWSER_SHOWDEVTOOLS, TempParam, 0);
end;
MINIBROWSER_CONTEXTMENU_COPYHTML :
PostMessage(Handle, MINIBROWSER_COPYHTML, 0, 0);
MINIBROWSER_CONTEXTMENU_SHOWRESPONSE :
PostMessage(Handle, MINIBROWSER_SHOWRESPONSE, 0, 0);
MINIBROWSER_CONTEXTMENU_JSWRITEDOC :
if (browser <> nil) and (browser.MainFrame <> nil) then
browser.MainFrame.ExecuteJavaScript(
'var css = ' + chr(39) + '@page {size: A4; margin: 0;} @media print {html, body {width: 210mm; height: 297mm;}}' + chr(39) + '; ' +
'var style = document.createElement(' + chr(39) + 'style' + chr(39) + '); ' +
'style.type = ' + chr(39) + 'text/css' + chr(39) + '; ' +
'style.appendChild(document.createTextNode(css)); ' +
'document.head.appendChild(style);',
'about:blank', 0);
MINIBROWSER_CONTEXTMENU_JSPRINTDOC :
if (browser <> nil) and (browser.MainFrame <> nil) then
browser.MainFrame.ExecuteJavaScript('window.print();', 'about:blank', 0);
end;
end;
procedure TMiniBrowserFrm.Chromium1FullScreenModeChange(Sender: TObject;
const browser: ICefBrowser; fullscreen: Boolean);
begin
if fullscreen then
begin
NavControlPnl.Visible := False;
StatusBar1.Visible := False;
if (WindowState = wsMaximized) then WindowState := wsNormal;
BorderIcons := [];
BorderStyle := bsNone;
WindowState := wsMaximized;
end
else
begin
BorderIcons := [biSystemMenu, biMinimize, biMaximize];
BorderStyle := bsSizeable;
WindowState := wsNormal;
NavControlPnl.Visible := True;
StatusBar1.Visible := True;
end;
end;
procedure TMiniBrowserFrm.Chromium1KeyEvent(Sender: TObject;
const browser: ICefBrowser; const event: PCefKeyEvent; osEvent: PMsg;
out Result: Boolean);
var
TempMsg : TMsg;
begin
Result := False;
if (event <> nil) and (osEvent <> nil) then
case osEvent.Message of
WM_KEYUP :
begin
TempMsg := osEvent^;
HandleKeyUp(TempMsg, Result);
end;
WM_KEYDOWN :
begin
TempMsg := osEvent^;
HandleKeyDown(TempMsg, Result);
end;
end;
end;
procedure TMiniBrowserFrm.ApplicationEvents1Message(var Msg: tagMSG;
var Handled: Boolean);
begin
case Msg.message of
WM_KEYUP : HandleKeyUp(Msg, Handled);
WM_KEYDOWN : HandleKeyDown(Msg, Handled);
end;
end;
procedure TMiniBrowserFrm.HandleKeyUp(const aMsg : TMsg; var aHandled : boolean);
var
TempMessage : TMessage;
TempKeyMsg : TWMKey;
begin
TempMessage.Msg := aMsg.message;
TempMessage.wParam := aMsg.wParam;
TempMessage.lParam := aMsg.lParam;
TempKeyMsg := TWMKey(TempMessage);
if (TempKeyMsg.CharCode = VK_F12) then
begin
aHandled := True;
if DevTools.Visible then
PostMessage(Handle, MINIBROWSER_HIDEDEVTOOLS, 0, 0)
else
PostMessage(Handle, MINIBROWSER_SHOWDEVTOOLS, 0, 0);
end;
end;
procedure TMiniBrowserFrm.HandleKeyDown(const aMsg : TMsg; var aHandled : boolean);
var
TempMessage : TMessage;
TempKeyMsg : TWMKey;
begin
TempMessage.Msg := aMsg.message;
TempMessage.wParam := aMsg.wParam;
TempMessage.lParam := aMsg.lParam;
TempKeyMsg := TWMKey(TempMessage);
if (TempKeyMsg.CharCode = VK_F12) then aHandled := True;
end;
procedure TMiniBrowserFrm.Chromium1LoadingStateChange(Sender: TObject;
const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean);
begin
BackBtn.Enabled := canGoBack;
ForwardBtn.Enabled := canGoForward;
ReloadBtn.Enabled := not(isLoading);
StopBtn.Enabled := isLoading;
end;
procedure TMiniBrowserFrm.Chromium1PdfPrintFinished(Sender: TObject; aResultOK: Boolean);
begin
if aResultOK then
showmessage('The PDF file was generated successfully')
else
showmessage('There was a problem generating the PDF file.');
end;
procedure TMiniBrowserFrm.Chromium1PreKeyEvent(Sender: TObject;
const browser: ICefBrowser; const event: PCefKeyEvent; osEvent: PMsg;
out isKeyboardShortcut, Result: Boolean);
begin
Result := False;
if (event <> nil) and
(event.kind in [KEYEVENT_KEYDOWN, KEYEVENT_KEYUP]) and
(event.windows_key_code = VK_F12) then
isKeyboardShortcut := True;
end;
procedure TMiniBrowserFrm.Chromium1ResourceResponse(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
const request: ICefRequest; const response: ICefResponse;
out Result: Boolean);
begin
Result := False;
if (frame <> nil) and frame.IsMain and (response <> nil) and (request <> nil) then
begin
FResponse := 'URL : ' + request.Url + #13 + #10 +
'Status : ' + inttostr(response.Status) + #13 + #10 +
'MimeType : ' + response.MimeType;
if (request.postdata <> nil) then
FResponse := FResponse + #13 + #10 + 'Post data elements : ' + inttostr(request.postdata.GetCount);
end;
end;
procedure TMiniBrowserFrm.ShowStatusText(const aText : string);
begin
StatusBar1.Panels[0].Text := aText;
end;
procedure TMiniBrowserFrm.Chromium1StatusMessage(Sender: TObject;
const browser: ICefBrowser; const value: ustring);
begin
ShowStatusText(value);
end;
procedure TMiniBrowserFrm.Chromium1TextResultAvailable(Sender: TObject; const aText: string);
begin
clipboard.AsText := aText;
end;
procedure TMiniBrowserFrm.Chromium1TitleChange(Sender: TObject;
const browser: ICefBrowser; const title: ustring);
begin
if (title <> '') then
caption := 'MiniBrowser - ' + title
else
caption := 'MiniBrowser';
end;
procedure TMiniBrowserFrm.FormShow(Sender: TObject);
begin
Chromium1.CreateBrowser(CEFWindowParent1, '');
end;
procedure TMiniBrowserFrm.BrowserCreatedMsg(var aMessage : TMessage);
begin
NavControlPnl.Enabled := True;
AddURL(MINIBROWSER_HOMEPAGE);
Chromium1.LoadURL(MINIBROWSER_HOMEPAGE);
end;
procedure TMiniBrowserFrm.AddURL(const aURL : string);
begin
if (URLCbx.Items.IndexOf(aURL) < 0) then URLCbx.Items.Add(aURL);
URLCbx.Text := aURL;
end;
procedure TMiniBrowserFrm.ShowDevToolsMsg(var aMessage : TMessage);
var
TempPoint : TPoint;
begin
TempPoint.x := (aMessage.wParam shr 16) and $FFFF;
TempPoint.y := aMessage.wParam and $FFFF;
ShowDevTools(TempPoint);
end;
procedure TMiniBrowserFrm.HideDevToolsMsg(var aMessage : TMessage);
begin
HideDevTools;
end;
procedure TMiniBrowserFrm.Inczoom1Click(Sender: TObject);
begin
Chromium1.IncZoomStep;
end;
procedure TMiniBrowserFrm.Openfile1Click(Sender: TObject);
begin
if OpenDialog1.Execute then Chromium1.LoadURL('file:///' + OpenDialog1.FileName);
end;
procedure TMiniBrowserFrm.PopupMenu1Popup(Sender: TObject);
begin
if DevTools.Visible then
DevTools1.Caption := 'Hide DevTools'
else
DevTools1.Caption := 'Show DevTools';
end;
procedure TMiniBrowserFrm.Preferences1Click(Sender: TObject);
begin
PreferencesFrm.ProxyTypeCbx.ItemIndex := Chromium1.ProxyType;
PreferencesFrm.ProxyServerEdt.Text := Chromium1.ProxyServer;
PreferencesFrm.ProxyPortEdt.Text := inttostr(Chromium1.ProxyPort);
PreferencesFrm.ProxyUsernameEdt.Text := Chromium1.ProxyUsername;
PreferencesFrm.ProxyPasswordEdt.Text := Chromium1.ProxyPassword;
PreferencesFrm.ProxyScriptURLEdt.Text := Chromium1.ProxyScriptURL;
PreferencesFrm.ProxyByPassListEdt.Text := Chromium1.ProxyByPassList;
PreferencesFrm.HeaderNameEdt.Text := Chromium1.CustomHeaderName;
PreferencesFrm.HeaderValueEdt.Text := Chromium1.CustomHeaderValue;
if (PreferencesFrm.ShowModal = mrOk) then
begin
Chromium1.ProxyType := PreferencesFrm.ProxyTypeCbx.ItemIndex;
Chromium1.ProxyServer := PreferencesFrm.ProxyServerEdt.Text;
Chromium1.ProxyPort := strtoint(PreferencesFrm.ProxyPortEdt.Text);
Chromium1.ProxyUsername := PreferencesFrm.ProxyUsernameEdt.Text;
Chromium1.ProxyPassword := PreferencesFrm.ProxyPasswordEdt.Text;
Chromium1.ProxyScriptURL := PreferencesFrm.ProxyScriptURLEdt.Text;
Chromium1.ProxyByPassList := PreferencesFrm.ProxyByPassListEdt.Text;
Chromium1.CustomHeaderName := PreferencesFrm.HeaderNameEdt.Text;
Chromium1.CustomHeaderValue := PreferencesFrm.HeaderValueEdt.Text;
Chromium1.UpdatePreferences;
end;
end;
procedure TMiniBrowserFrm.Print1Click(Sender: TObject);
begin
Chromium1.Print;
end;
procedure TMiniBrowserFrm.PrintinPDF1Click(Sender: TObject);
begin
SaveDialog1.DefaultExt := 'pdf';
SaveDialog1.Filter := 'PDF files (*.pdf)|*.PDF';
if SaveDialog1.Execute and (length(SaveDialog1.FileName) > 0) then
Chromium1.PrintToPDF(SaveDialog1.FileName, Chromium1.DocumentURL, Chromium1.DocumentURL);
end;
procedure TMiniBrowserFrm.ConfigBtnClick(Sender: TObject);
var
TempPoint : TPoint;
begin
TempPoint.x := ConfigBtn.left;
TempPoint.y := ConfigBtn.top + ConfigBtn.Height;
TempPoint := ConfigPnl.ClientToScreen(TempPoint);
PopupMenu1.Popup(TempPoint.x, TempPoint.y);
end;
procedure TMiniBrowserFrm.CopyHTMLMsg(var aMessage : TMessage);
begin
Chromium1.RetrieveHTML;
end;
procedure TMiniBrowserFrm.ShowResponseMsg(var aMessage : TMessage);
begin
if (length(FResponse) > 0) then MessageDlg(FResponse, mtInformation, [mbOk], 0);
end;
procedure TMiniBrowserFrm.WMMove(var aMessage : TWMMove);
begin
inherited;
if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
end;
procedure TMiniBrowserFrm.WMMoving(var aMessage : TMessage);
begin
inherited;
if (Chromium1 <> nil) then Chromium1.NotifyMoveOrResizeStarted;
end;
procedure TMiniBrowserFrm.Deczoom1Click(Sender: TObject);
begin
Chromium1.DecZoomStep;
end;
procedure TMiniBrowserFrm.DevTools1Click(Sender: TObject);
begin
if DevTools.Visible then
HideDevTools
else
ShowDevTools;
end;
procedure TMiniBrowserFrm.ShowDevTools(aPoint : TPoint);
begin
Splitter1.Visible := True;
DevTools.Visible := True;
DevTools.Width := Width div 4;
Chromium1.ShowDevTools(aPoint, DevTools);
end;
procedure TMiniBrowserFrm.ShowDevTools;
var
TempPoint : TPoint;
begin
TempPoint.x := low(integer);
TempPoint.y := low(integer);
ShowDevTools(TempPoint);
end;
procedure TMiniBrowserFrm.HideDevTools;
begin
Chromium1.CloseDevTools(DevTools);
Splitter1.Visible := False;
DevTools.Visible := False;
DevTools.Width := 0;
end;
end.
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