/
uMiniBrowser.pas
1244 lines (1063 loc) · 41 KB
/
uMiniBrowser.pas
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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 © 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 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, Winapi.ActiveX, Winapi.ShlObj,
{$ELSE}
Windows, Messages, SysUtils, Variants, Classes, Graphics, Menus,
Controls, Forms, Dialogs, StdCtrls, ExtCtrls, Types, ComCtrls, ClipBrd, AppEvnts, ActiveX, ShlObj,
{$ENDIF}
uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFApplication, uCEFTypes, uCEFConstants,
uCEFWinControl;
const
MINIBROWSER_SHOWDEVTOOLS = WM_APP + $101;
MINIBROWSER_HIDEDEVTOOLS = WM_APP + $102;
MINIBROWSER_COPYHTML = WM_APP + $103;
MINIBROWSER_SHOWRESPONSE = WM_APP + $104;
MINIBROWSER_COPYFRAMEIDS = WM_APP + $105;
MINIBROWSER_COPYFRAMENAMES = WM_APP + $106;
MINIBROWSER_SAVEPREFERENCES = WM_APP + $107;
MINIBROWSER_COPYALLTEXT = WM_APP + $108;
MINIBROWSER_TAKESNAPSHOT = WM_APP + $109;
MINIBROWSER_SHOWNAVIGATION = WM_APP + $10A;
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 + 3;
MINIBROWSER_CONTEXTMENU_JSWRITEDOC = MENU_ID_USER_FIRST + 4;
MINIBROWSER_CONTEXTMENU_JSPRINTDOC = MENU_ID_USER_FIRST + 5;
MINIBROWSER_CONTEXTMENU_SHOWRESPONSE = MENU_ID_USER_FIRST + 6;
MINIBROWSER_CONTEXTMENU_COPYFRAMEIDS = MENU_ID_USER_FIRST + 7;
MINIBROWSER_CONTEXTMENU_COPYFRAMENAMES = MENU_ID_USER_FIRST + 8;
MINIBROWSER_CONTEXTMENU_SAVEPREFERENCES = MENU_ID_USER_FIRST + 9;
MINIBROWSER_CONTEXTMENU_COPYALLTEXT = MENU_ID_USER_FIRST + 10;
MINIBROWSER_CONTEXTMENU_TAKESNAPSHOT = MENU_ID_USER_FIRST + 11;
MINIBROWSER_CONTEXTMENU_GETNAVIGATION = MENU_ID_USER_FIRST + 12;
MINIBROWSER_CONTEXTMENU_MUTEAUDIO = MENU_ID_USER_FIRST + 13;
MINIBROWSER_CONTEXTMENU_UNMUTEAUDIO = MENU_ID_USER_FIRST + 14;
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;
Resolvehost1: TMenuItem;
Timer1: TTimer;
OpenfilewithaDAT1: TMenuItem;
N5: TMenuItem;
Memoryinfo1: 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: ustring);
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);
procedure StopBtnClick(Sender: TObject);
procedure Resolvehost1Click(Sender: TObject);
procedure Chromium1ResolvedHostAvailable(Sender: TObject;
result: Integer; const resolvedIps: TStrings);
procedure Timer1Timer(Sender: TObject);
procedure Chromium1PrefsAvailable(Sender: TObject; aResultOK: Boolean);
procedure Chromium1BeforeDownload(Sender: TObject;
const browser: ICefBrowser; const downloadItem: ICefDownloadItem;
const suggestedName: ustring;
const callback: ICefBeforeDownloadCallback);
procedure Chromium1DownloadUpdated(Sender: TObject;
const browser: ICefBrowser; const downloadItem: ICefDownloadItem;
const callback: ICefDownloadItemCallback);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure Chromium1BeforeResourceLoad(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
const request: ICefRequest; const callback: ICefRequestCallback;
out Result: TCefReturnValue);
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
procedure Chromium1Close(Sender: TObject; const browser: ICefBrowser;
var aAction : TCefCloseBrowserAction);
procedure Chromium1BeforeClose(Sender: TObject;
const browser: ICefBrowser);
procedure Chromium1RenderCompMsg(var aMessage : TMessage; var aHandled: Boolean);
procedure Chromium1LoadingProgressChange(Sender: TObject;
const browser: ICefBrowser; const progress: Double);
procedure OpenfilewithaDAT1Click(Sender: TObject);
procedure Chromium1LoadEnd(Sender: TObject; const browser: ICefBrowser;
const frame: ICefFrame; httpStatusCode: Integer);
procedure Memoryinfo1Click(Sender: TObject);
procedure Chromium1LoadError(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
errorCode: Integer; const errorText, failedUrl: ustring);
procedure Chromium1CertificateError(Sender: TObject;
const browser: ICefBrowser; certError: Integer;
const requestUrl: ustring; const sslInfo: ICefSslInfo;
const callback: ICefRequestCallback; out Result: Boolean);
procedure Chromium1NavigationVisitorResultAvailable(
const entry: ICefNavigationEntry; current: Boolean; index, total: Integer;
var aResult: Boolean);
protected
FResponse : TStringList;
FRequest : TStringList;
FNavigation : TStringList;
// 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 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 InspectRequest(const aRequest : ICefRequest);
procedure InspectResponse(const aResponse : ICefResponse);
procedure BrowserCreatedMsg(var aMessage : TMessage); message CEF_AFTERCREATED;
procedure BrowserDestroyMsg(var aMessage : TMessage); message CEF_DESTROY;
procedure ShowDevToolsMsg(var aMessage : TMessage); message MINIBROWSER_SHOWDEVTOOLS;
procedure HideDevToolsMsg(var aMessage : TMessage); message MINIBROWSER_HIDEDEVTOOLS;
procedure CopyAllTextMsg(var aMessage : TMessage); message MINIBROWSER_COPYALLTEXT;
procedure CopyHTMLMsg(var aMessage : TMessage); message MINIBROWSER_COPYHTML;
procedure CopyFramesIDsMsg(var aMessage : TMessage); message MINIBROWSER_COPYFRAMEIDS;
procedure CopyFramesNamesMsg(var aMessage : TMessage); message MINIBROWSER_COPYFRAMENAMES;
procedure ShowResponseMsg(var aMessage : TMessage); message MINIBROWSER_SHOWRESPONSE;
procedure ShowNavigationMsg(var aMessage : TMessage); message MINIBROWSER_SHOWNAVIGATION;
procedure SavePreferencesMsg(var aMessage : TMessage); message MINIBROWSER_SAVEPREFERENCES;
procedure TakeSnapshotMsg(var aMessage : TMessage); message MINIBROWSER_TAKESNAPSHOT;
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
procedure ShowStatusText(const aText : string);
end;
var
MiniBrowserFrm : TMiniBrowserFrm;
implementation
{$R *.dfm}
uses
uPreferences, uCefStringMultimap, uCEFMiscFunctions, uSimpleTextViewer;
// 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 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.Resolvehost1Click(Sender: TObject);
var
TempURL : string;
begin
TempURL := inputbox('Resolve host', 'URL :', 'http://google.com');
if (length(TempURL) > 0) then Chromium1.ResolveHost(TempURL);
end;
procedure TMiniBrowserFrm.Chromium1AddressChange(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame; const url: ustring);
begin
if Chromium1.IsSameBrowser(browser) then AddURL(url);
end;
procedure TMiniBrowserFrm.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
begin
if Chromium1.IsSameBrowser(browser) then
PostMessage(Handle, CEF_AFTERCREATED, 0, 0)
else
SendMessage(browser.Host.WindowHandle, WM_SETICON, 1, application.Icon.Handle); // Use the same icon in the popup window
end;
procedure TMiniBrowserFrm.Chromium1BeforeClose(Sender: TObject; const browser: ICefBrowser);
begin
// The main browser is being destroyed
if (Chromium1.BrowserId = 0) then
begin
FCanClose := True;
PostMessage(Handle, WM_CLOSE, 0, 0);
end;
end;
procedure TMiniBrowserFrm.Chromium1BeforeContextMenu(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
const params: ICefContextMenuParams; const model: ICefMenuModel);
begin
if not(Chromium1.IsSameBrowser(browser)) then exit;
model.AddSeparator;
model.AddItem(MINIBROWSER_CONTEXTMENU_TAKESNAPSHOT, 'Take snapshot...');
model.AddItem(MINIBROWSER_CONTEXTMENU_GETNAVIGATION, 'Get navigation entries');
model.AddSeparator;
model.AddItem(MINIBROWSER_CONTEXTMENU_COPYALLTEXT, 'Copy displayed text to clipboard');
model.AddItem(MINIBROWSER_CONTEXTMENU_COPYHTML, 'Copy HTML to clipboard');
model.AddItem(MINIBROWSER_CONTEXTMENU_COPYFRAMEIDS, 'Copy HTML frame identifiers to clipboard');
model.AddItem(MINIBROWSER_CONTEXTMENU_COPYFRAMENAMES, 'Copy HTML frame names to clipboard');
model.AddSeparator;
model.AddItem(MINIBROWSER_CONTEXTMENU_SAVEPREFERENCES, 'Save preferences as...');
model.AddSeparator;
model.AddItem(MINIBROWSER_CONTEXTMENU_JSWRITEDOC, 'Modify HTML document');
model.AddItem(MINIBROWSER_CONTEXTMENU_JSPRINTDOC, 'Print using Javascript');
model.AddItem(MINIBROWSER_CONTEXTMENU_SHOWRESPONSE, 'Show server headers');
if DevTools.Visible then
model.AddItem(MINIBROWSER_CONTEXTMENU_HIDEDEVTOOLS, 'Hide DevTools')
else
model.AddItem(MINIBROWSER_CONTEXTMENU_SHOWDEVTOOLS, 'Show DevTools');
if Chromium1.AudioMuted then
model.AddItem(MINIBROWSER_CONTEXTMENU_UNMUTEAUDIO, 'Unmute audio')
else
model.AddItem(MINIBROWSER_CONTEXTMENU_MUTEAUDIO, 'Mute audio');
end;
function PathToMyDocuments : string;
var
Allocator : IMalloc;
Path : pchar;
idList : PItemIDList;
begin
Result := '';
Path := nil;
idList := nil;
try
if (SHGetMalloc(Allocator) = S_OK) then
begin
GetMem(Path, MAX_PATH);
if (SHGetSpecialFolderLocation(0, CSIDL_PERSONAL, idList) = S_OK) and
SHGetPathFromIDList(idList, Path) then
Result := string(Path);
end;
finally
if (Path <> nil) then FreeMem(Path);
if (idList <> nil) then Allocator.Free(idList);
end;
end;
procedure TMiniBrowserFrm.Chromium1BeforeDownload(Sender: TObject;
const browser: ICefBrowser; const downloadItem: ICefDownloadItem;
const suggestedName: ustring;
const callback: ICefBeforeDownloadCallback);
var
TempMyDocuments, TempFullPath, TempName : string;
begin
if not(Chromium1.IsSameBrowser(browser)) or
(downloadItem = nil) or
not(downloadItem.IsValid) then
exit;
TempMyDocuments := PathToMyDocuments;
if (length(suggestedName) > 0) then
TempName := suggestedName
else
TempName := 'DownloadedFile';
if (length(TempMyDocuments) > 0) then
TempFullPath := IncludeTrailingPathDelimiter(TempMyDocuments) + TempName
else
TempFullPath := TempName;
callback.cont(TempFullPath, False);
end;
procedure TMiniBrowserFrm.Chromium1BeforeResourceLoad(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
const request: ICefRequest; const callback: ICefRequestCallback;
out Result: TCefReturnValue);
begin
Result := RV_CONTINUE;
if Chromium1.IsSameBrowser(browser) and
(frame <> nil) and
frame.IsMain then
InspectRequest(request);
end;
procedure TMiniBrowserFrm.Chromium1CertificateError(Sender: TObject;
const browser: ICefBrowser; certError: Integer;
const requestUrl: ustring; const sslInfo: ICefSslInfo;
const callback: ICefRequestCallback; out Result: Boolean);
begin
CefDebugLog('Certificate error code:' + inttostr(certError) +
' - URL:' + requestUrl, CEF_LOG_SEVERITY_ERROR);
Result := False;
end;
procedure TMiniBrowserFrm.Chromium1Close(Sender: TObject; const browser: ICefBrowser; var aAction : TCefCloseBrowserAction);
begin
if (browser <> nil) and (Chromium1.BrowserId = browser.Identifier) then
begin
PostMessage(Handle, CEF_DESTROY, 0, 0);
aAction := cbaDelay;
end;
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;
if not(Chromium1.IsSameBrowser(browser)) then exit;
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_COPYALLTEXT :
PostMessage(Handle, MINIBROWSER_COPYALLTEXT, 0, 0);
MINIBROWSER_CONTEXTMENU_COPYHTML :
PostMessage(Handle, MINIBROWSER_COPYHTML, 0, 0);
MINIBROWSER_CONTEXTMENU_COPYFRAMEIDS :
PostMessage(Handle, MINIBROWSER_COPYFRAMEIDS, 0, 0);
MINIBROWSER_CONTEXTMENU_COPYFRAMENAMES :
PostMessage(Handle, MINIBROWSER_COPYFRAMENAMES, 0, 0);
MINIBROWSER_CONTEXTMENU_SHOWRESPONSE :
PostMessage(Handle, MINIBROWSER_SHOWRESPONSE, 0, 0);
MINIBROWSER_CONTEXTMENU_SAVEPREFERENCES :
PostMessage(Handle, MINIBROWSER_SAVEPREFERENCES, 0, 0);
MINIBROWSER_CONTEXTMENU_TAKESNAPSHOT :
PostMessage(Handle, MINIBROWSER_TAKESNAPSHOT, 0, 0);
MINIBROWSER_CONTEXTMENU_GETNAVIGATION :
begin
FNavigation.Clear;
Chromium1.GetNavigationEntries(False);
end;
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);
MINIBROWSER_CONTEXTMENU_UNMUTEAUDIO :
Chromium1.AudioMuted := False;
MINIBROWSER_CONTEXTMENU_MUTEAUDIO :
Chromium1.AudioMuted := True;
end;
end;
procedure TMiniBrowserFrm.Chromium1DownloadUpdated(Sender: TObject;
const browser: ICefBrowser; const downloadItem: ICefDownloadItem;
const callback: ICefDownloadItemCallback);
var
TempString : string;
begin
if not(Chromium1.IsSameBrowser(browser)) then exit;
if downloadItem.IsComplete then
ShowStatusText(downloadItem.FullPath + ' completed')
else
if downloadItem.IsCanceled then
ShowStatusText(downloadItem.FullPath + ' canceled')
else
if downloadItem.IsInProgress then
begin
if (downloadItem.PercentComplete >= 0) then
TempString := downloadItem.FullPath + ' : ' + inttostr(downloadItem.PercentComplete) + '%'
else
TempString := downloadItem.FullPath + ' : ' + inttostr(downloadItem.ReceivedBytes) + ' bytes received';
ShowStatusText(TempString);
end;
end;
procedure TMiniBrowserFrm.Chromium1FullScreenModeChange(Sender: TObject;
const browser: ICefBrowser; fullscreen: Boolean);
begin
if not(Chromium1.IsSameBrowser(browser)) then exit;
// This event is executed in a CEF thread and this can cause problems when
// you change the 'Enabled' and 'Visible' properties from VCL components.
// It's recommended to change the 'Enabled' and 'Visible' properties
// in the main application thread and not in a CEF thread.
// It's much safer to use PostMessage to send a message to the main form with
// all this information and update those properties in the procedure handling
// that message.
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.Chromium1LoadEnd(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame;
httpStatusCode: Integer);
begin
if frame.IsMain then
StatusBar1.Panels[1].Text := 'main frame loaded : ' + quotedstr(frame.name)
else
StatusBar1.Panels[1].Text := 'frame loaded : ' + quotedstr(frame.name);
end;
procedure TMiniBrowserFrm.Chromium1LoadError(Sender: TObject;
const browser: ICefBrowser; const frame: ICefFrame; errorCode: Integer;
const errorText, failedUrl: ustring);
begin
CefDebugLog('Error code:' + inttostr(errorCode) +
' - Error text :' + quotedstr(errorText) +
' - URL:' + failedUrl, CEF_LOG_SEVERITY_ERROR);
end;
procedure TMiniBrowserFrm.Chromium1LoadingProgressChange(Sender: TObject;
const browser: ICefBrowser; const progress: Double);
begin
StatusBar1.Panels[0].Text := 'Loading... ' + FloatToStrF(progress * 100, ffFixed, 3, 0) + '%';
end;
procedure TMiniBrowserFrm.Chromium1LoadingStateChange(Sender: TObject;
const browser: ICefBrowser; isLoading, canGoBack, canGoForward: Boolean);
begin
if not(Chromium1.IsSameBrowser(browser)) or FClosing then exit;
// This event is executed in a CEF thread and this can cause problems when
// you change the 'Enabled' and 'Visible' properties from VCL components.
// It's recommended to change the 'Enabled' and 'Visible' properties
// in the main application thread and not in a CEF thread.
// It's much safer to use PostMessage to send a message to the main form with
// all this information and update those properties in the procedure handling
// that message.
BackBtn.Enabled := canGoBack;
ForwardBtn.Enabled := canGoForward;
if isLoading then
begin
StatusBar1.Panels[0].Text := 'Loading...';
ReloadBtn.Enabled := False;
StopBtn.Enabled := True;
end
else
begin
StatusBar1.Panels[0].Text := 'Finished';
ReloadBtn.Enabled := True;
StopBtn.Enabled := False;
end;
end;
procedure TMiniBrowserFrm.Chromium1NavigationVisitorResultAvailable(
const entry: ICefNavigationEntry; current: Boolean; index, total: Integer;
var aResult: Boolean);
begin
if (entry <> nil) and entry.IsValid then FNavigation.Add(entry.Url);
if (index < pred(total)) then
aResult := True
else
begin
aResult := False;
PostMessage(Handle, MINIBROWSER_SHOWNAVIGATION, 0, 0);
end;
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.Chromium1PrefsAvailable(Sender: TObject; aResultOK: Boolean);
begin
if aResultOK then
showmessage('The preferences file was generated successfully')
else
showmessage('There was a problem generating the preferences 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.Chromium1RenderCompMsg(var aMessage : TMessage; var aHandled: Boolean);
begin
if not(FClosing) and (aMessage.Msg = WM_MOUSEMOVE) then
begin
StatusBar1.Panels[2].Text := 'x : ' + inttostr(aMessage.lParam and $FFFF);
StatusBar1.Panels[3].Text := 'y : ' + inttostr((aMessage.lParam and $FFFF0000) shr 16);
end;
end;
procedure TMiniBrowserFrm.Chromium1ResolvedHostAvailable(Sender: TObject;
result: Integer; const resolvedIps: TStrings);
begin
if (result = ERR_NONE) then
showmessage('Resolved IPs : ' + resolvedIps.CommaText)
else
showmessage('There was a problem resolving the host.' + CRLF +
'Error code : ' + inttostr(result));
end;
procedure TMiniBrowserFrm.InspectRequest(const aRequest : ICefRequest);
var
TempHeaderMap : ICefStringMultimap;
i, j : integer;
begin
if (aRequest <> nil) then
begin
FRequest.Clear;
TempHeaderMap := TCefStringMultimapOwn.Create;
aRequest.GetHeaderMap(TempHeaderMap);
i := 0;
j := TempHeaderMap.Size;
while (i < j) do
begin
FRequest.Add(TempHeaderMap.Key[i] + '=' + TempHeaderMap.Value[i]);
inc(i);
end;
end;
end;
procedure TMiniBrowserFrm.InspectResponse(const aResponse : ICefResponse);
var
TempHeaderMap : ICefStringMultimap;
i, j : integer;
begin
if (aResponse <> nil) then
begin
FResponse.Clear;
TempHeaderMap := TCefStringMultimapOwn.Create;
aResponse.GetHeaderMap(TempHeaderMap);
i := 0;
j := TempHeaderMap.Size;
while (i < j) do
begin
FResponse.Add(TempHeaderMap.Key[i] + '=' + TempHeaderMap.Value[i]);
inc(i);
end;
end;
end;
procedure TMiniBrowserFrm.Memoryinfo1Click(Sender: TObject);
const
BYTES_PER_MEGABYTE = 1024 * 1024;
var
TempMessage : string;
begin
TempMessage := 'Total memory used by this application : ' + inttostr(GlobalCEFApp.UsedMemory div BYTES_PER_MEGABYTE) + ' Mb' + CRLF +
'Total system memory : ' + inttostr(GlobalCEFApp.TotalSystemMemory div BYTES_PER_MEGABYTE) + ' Mb' + CRLF +
'Available physical memory : ' + inttostr(GlobalCEFApp.AvailableSystemMemory div BYTES_PER_MEGABYTE) + ' Mb' + CRLF +
'Memory load : ' + inttostr(GlobalCEFApp.SystemMemoryLoad) + ' %';
MessageDlg(TempMessage, mtInformation, [mbOK], 0);
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 Chromium1.IsSameBrowser(browser) and
(frame <> nil) and
frame.IsMain then
InspectResponse(response);
end;
procedure TMiniBrowserFrm.ShowStatusText(const aText : string);
begin
if not(FClosing) then StatusBar1.Panels[1].Text := aText;
end;
procedure TMiniBrowserFrm.StopBtnClick(Sender: TObject);
begin
Chromium1.StopLoad;
end;
procedure TMiniBrowserFrm.Chromium1StatusMessage(Sender: TObject;
const browser: ICefBrowser; const value: ustring);
begin
if Chromium1.IsSameBrowser(browser) then ShowStatusText(value);
end;
procedure TMiniBrowserFrm.Chromium1TextResultAvailable(Sender: TObject; const aText: ustring);
begin
clipboard.AsText := aText;
end;
procedure TMiniBrowserFrm.Chromium1TitleChange(Sender: TObject;
const browser: ICefBrowser; const title: ustring);
begin
if not(Chromium1.IsSameBrowser(browser)) then exit;
if (title <> '') then
caption := 'MiniBrowser - ' + title
else
caption := 'MiniBrowser';
end;
procedure TMiniBrowserFrm.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
CanClose := FCanClose;
if not(FClosing) then
begin
FClosing := True;
Visible := False;
Chromium1.CloseBrowser(True);
end;
end;
procedure TMiniBrowserFrm.FormCreate(Sender: TObject);
begin
FCanClose := False;
FClosing := False;
FResponse := TStringList.Create;
FRequest := TStringList.Create;
FNavigation := TStringList.Create;
Chromium1.DefaultURL := MINIBROWSER_HOMEPAGE;
end;
procedure TMiniBrowserFrm.FormDestroy(Sender: TObject);
begin
FResponse.Free;
FRequest.Free;
FNavigation.Free;
end;
procedure TMiniBrowserFrm.FormShow(Sender: TObject);
begin
ShowStatusText('Initializing browser. Please wait...');
// WebRTC's IP leaking can lowered/avoided by setting these preferences
// To test this go to https://www.browserleaks.com/webrtc
Chromium1.WebRTCIPHandlingPolicy := hpDisableNonProxiedUDP;
Chromium1.WebRTCMultipleRoutes := STATE_DISABLED;
Chromium1.WebRTCNonproxiedUDP := STATE_DISABLED;
// 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 TMiniBrowserFrm.Timer1Timer(Sender: TObject);
begin
Timer1.Enabled := False;
if not(Chromium1.CreateBrowser(CEFWindowParent1, '')) and not(Chromium1.Initialized) then
Timer1.Enabled := True;
end;
procedure TMiniBrowserFrm.BrowserCreatedMsg(var aMessage : TMessage);
begin
CEFWindowParent1.UpdateSize;
NavControlPnl.Enabled := True;
end;
procedure TMiniBrowserFrm.BrowserDestroyMsg(var aMessage : TMessage);
begin
CEFWindowParent1.Free;
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;
Chromium1.SetFocus(True);
end;
procedure TMiniBrowserFrm.Inczoom1Click(Sender: TObject);
begin
Chromium1.IncZoomStep;
end;
procedure TMiniBrowserFrm.Openfile1Click(Sender: TObject);
begin
OpenDialog1.Filter := 'Any file (*.*)|*.*';
if OpenDialog1.Execute then
begin
// This is a quick solution to load files. The file URL should be properly encoded.
Chromium1.LoadURL('file:///' + OpenDialog1.FileName);
end;
end;
procedure TMiniBrowserFrm.OpenfilewithaDAT1Click(Sender: TObject);
var
TempDATA : string;
TempFile : TMemoryStream;
begin
TempFile := nil;
try
try
OpenDialog1.Filter := 'HTML files (*.html)|*.HTML;*.HTM|PDF files (*.pdf)|*.PDF';
if OpenDialog1.Execute then
begin
// Use TByteStream instead of TMemoryStream if your Delphi version supports it.
TempFile := TMemoryStream.Create;
TempFile.LoadFromFile(OpenDialog1.FileName);
if (OpenDialog1.FilterIndex = 1) then
TempDATA := 'data:text/html;charset=utf-8;base64,' + CefBase64Encode(TempFile.Memory, TempFile.Size)
else
TempDATA := 'data:application/pdf;charset=utf-8;base64,' + CefBase64Encode(TempFile.Memory, TempFile.Size);
Chromium1.LoadURL(TempDATA);
end;
except
on e : exception do
if CustomExceptionHandler('TMiniBrowserFrm.OpenfilewithaDAT1Click', e) then raise;
end;
finally
if (TempFile <> nil) then FreeAndNil(TempFile);