// ************************************************************************
// ***************************** 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 © 2020 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 uSimpleOSRBrowser;
{$I cef.inc}
interface
uses
{$IFDEF DELPHI16_UP}
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes,
System.SyncObjs, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls,
Vcl.ExtCtrls, Vcl.AppEvnts, WinApi.imm,
{$ELSE}
Windows, Messages, SysUtils, Variants, Classes, SyncObjs,
Graphics, Controls, Forms, Dialogs, StdCtrls, ExtCtrls, AppEvnts,
{$ENDIF}
uCEFChromium, uCEFTypes, uCEFInterfaces, uCEFConstants, uCEFBufferPanel,
uCEFSentinel, uCEFChromiumCore;
const
// Set this constant to True and load "file://transparency.html" to test a
// transparent browser.
TRANSPARENT_BROWSER = False;
type
TForm1 = class(TForm)
NavControlPnl: TPanel;
chrmosr: TChromium;
AppEvents: TApplicationEvents;
ComboBox1: TComboBox;
Panel2: TPanel;
GoBtn: TButton;
SnapshotBtn: TButton;
SaveDialog1: TSaveDialog;
Timer1: TTimer;
Panel1: TBufferPanel;
procedure AppEventsMessage(var Msg: tagMSG; var Handled: Boolean);
procedure GoBtnClick(Sender: TObject);
procedure GoBtnEnter(Sender: TObject);
procedure Panel1Enter(Sender: TObject);
procedure Panel1Exit(Sender: TObject);
procedure Panel1Resize(Sender: TObject);
procedure Panel1Click(Sender: TObject);
procedure Panel1PaintParentBkg(Sender: TObject);
procedure Panel1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
procedure Panel1MouseUp(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
procedure Panel1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
procedure Panel1MouseLeave(Sender: TObject);
procedure Panel1IMECancelComposition(Sender: TObject);
procedure Panel1IMECommitText(Sender: TObject; const aText: ustring; const replacement_range: PCefRange; relative_cursor_pos: Integer);
procedure Panel1IMESetComposition(Sender: TObject; const aText: ustring; const underlines: TCefCompositionUnderlineDynArray; const replacement_range, selection_range: TCefRange);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure FormShow(Sender: TObject);
procedure FormHide(Sender: TObject);
procedure FormAfterMonitorDpiChanged(Sender: TObject; OldDPI, NewDPI: Integer);
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
procedure chrmosrPaint(Sender: TObject; const browser: ICefBrowser; kind: TCefPaintElementType; dirtyRectsCount: NativeUInt; const dirtyRects: PCefRectArray; const buffer: Pointer; width, height: Integer);
procedure chrmosrCursorChange(Sender: TObject; const browser: ICefBrowser; cursor: HICON; cursorType: TCefCursorType; const customCursorInfo: PCefCursorInfo);
procedure chrmosrGetViewRect(Sender: TObject; const browser: ICefBrowser; var rect: TCefRect);
procedure chrmosrGetScreenPoint(Sender: TObject; const browser: ICefBrowser; viewX, viewY: Integer; var screenX, screenY: Integer; out Result: Boolean);
procedure chrmosrGetScreenInfo(Sender: TObject; const browser: ICefBrowser; var screenInfo: TCefScreenInfo; out Result: Boolean);
procedure chrmosrPopupShow(Sender: TObject; const browser: ICefBrowser; show: Boolean);
procedure chrmosrPopupSize(Sender: TObject; const browser: ICefBrowser; const rect: PCefRect);
procedure chrmosrAfterCreated(Sender: TObject; const browser: ICefBrowser);
procedure chrmosrTooltip(Sender: TObject; const browser: ICefBrowser; var text: ustring; out Result: Boolean);
procedure chrmosrBeforePopup(Sender: TObject; const browser: ICefBrowser; const frame: ICefFrame; const targetUrl, targetFrameName: ustring; targetDisposition: TCefWindowOpenDisposition; userGesture: Boolean; const popupFeatures: TCefPopupFeatures; var windowInfo: TCefWindowInfo; var client: ICefClient; var settings: TCefBrowserSettings; var extra_info: ICefDictionaryValue; var noJavascriptAccess: Boolean; var Result: Boolean);
procedure chrmosrBeforeClose(Sender: TObject; const browser: ICefBrowser);
procedure chrmosrIMECompositionRangeChanged(Sender: TObject; const browser: ICefBrowser; const selected_range: PCefRange; character_boundsCount: NativeUInt; const character_bounds: PCefRect);
procedure SnapshotBtnClick(Sender: TObject);
procedure SnapshotBtnEnter(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
procedure ComboBox1Enter(Sender: TObject);
protected
FPopUpBitmap : TBitmap;
FPopUpRect : TRect;
FShowPopUp : boolean;
FResizing : boolean;
FPendingResize : boolean;
FCanClose : boolean;
FClosing : boolean;
FResizeCS : TCriticalSection;
FIMECS : TCriticalSection;
FDeviceBounds : TCefRectDynArray;
FSelectedRange : TCefRange;
FLastClickCount : integer;
FLastClickTime : integer;
FLastClickPoint : TPoint;
FLastClickButton : TMouseButton;
function getModifiers(Shift: TShiftState): TCefEventFlags;
function GetButton(Button: TMouseButton): TCefMouseButtonType;
procedure DoResize;
procedure InitializeLastClick;
function CancelPreviousClick(x, y : integer; var aCurrentTime : integer) : boolean;
procedure WMMove(var aMessage : TWMMove); message WM_MOVE;
procedure WMMoving(var aMessage : TMessage); message WM_MOVING;
procedure WMCaptureChanged(var aMessage : TMessage); message WM_CAPTURECHANGED;
procedure WMCancelMode(var aMessage : TMessage); message WM_CANCELMODE;
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 PendingResizeMsg(var aMessage : TMessage); message CEF_PENDINGRESIZE;
procedure RangeChangedMsg(var aMessage : TMessage); message CEF_IMERANGECHANGED;
public
{ Public declarations }
end;
var
Form1: TForm1;
procedure CreateGlobalCEFApp;
implementation
{$R *.dfm}
uses
{$IFDEF DELPHI16_UP}
System.Math,
{$ELSE}
Math,
{$ENDIF}
uCEFMiscFunctions, uCEFApplication;
// This is the destruction sequence in OSR mode :
// 1- FormCloseQuery sets CanClose to the initial FCanClose value (False) and calls chrmosr.CloseBrowser(True).
// 2- chrmosr.CloseBrowser(True) will trigger chrmosr.OnClose and we have to
// set "Result" to false and CEF will destroy the internal browser immediately.
// 3- chrmosr.OnBeforeClose is triggered because the internal browser was destroyed.
// Sets FCanClose := True and sends WM_CLOSE to the form.
procedure CreateGlobalCEFApp;
begin
GlobalCEFApp := TCefApplication.Create;
GlobalCEFApp.WindowlessRenderingEnabled := True;
GlobalCEFApp.EnableHighDPISupport := True;
// If you need transparency leave the GlobalCEFApp.BackgroundColor property
// with the default value or set the alpha channel to 0
if TRANSPARENT_BROWSER then
GlobalCEFApp.BackgroundColor := CefColorSetARGB($00, $FF, $FF, $FF)
else
GlobalCEFApp.BackgroundColor := CefColorSetARGB($FF, $FF, $FF, $FF);
end;
procedure TForm1.AppEventsMessage(var Msg: tagMSG; var Handled: Boolean);
var
TempKeyEvent : TCefKeyEvent;
TempMouseEvent : TCefMouseEvent;
begin
case Msg.message of
WM_SYSCHAR :
if Panel1.Focused then
begin
TempKeyEvent.kind := KEYEVENT_CHAR;
TempKeyEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempKeyEvent.windows_key_code := Msg.wParam;
TempKeyEvent.native_key_code := Msg.lParam;
TempKeyEvent.is_system_key := ord(True);
TempKeyEvent.character := #0;
TempKeyEvent.unmodified_character := #0;
TempKeyEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempKeyEvent);
Handled := True;
end;
WM_SYSKEYDOWN :
if Panel1.Focused then
begin
TempKeyEvent.kind := KEYEVENT_RAWKEYDOWN;
TempKeyEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempKeyEvent.windows_key_code := Msg.wParam;
TempKeyEvent.native_key_code := Msg.lParam;
TempKeyEvent.is_system_key := ord(True);
TempKeyEvent.character := #0;
TempKeyEvent.unmodified_character := #0;
TempKeyEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempKeyEvent);
Handled := True;
end;
WM_SYSKEYUP :
if Panel1.Focused then
begin
TempKeyEvent.kind := KEYEVENT_KEYUP;
TempKeyEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempKeyEvent.windows_key_code := Msg.wParam;
TempKeyEvent.native_key_code := Msg.lParam;
TempKeyEvent.is_system_key := ord(True);
TempKeyEvent.character := #0;
TempKeyEvent.unmodified_character := #0;
TempKeyEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempKeyEvent);
Handled := True;
end;
WM_KEYDOWN :
if Panel1.Focused then
begin
TempKeyEvent.kind := KEYEVENT_RAWKEYDOWN;
TempKeyEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempKeyEvent.windows_key_code := Msg.wParam;
TempKeyEvent.native_key_code := Msg.lParam;
TempKeyEvent.is_system_key := ord(False);
TempKeyEvent.character := #0;
TempKeyEvent.unmodified_character := #0;
TempKeyEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempKeyEvent);
Handled := (Msg.wParam in [VK_LEFT, VK_RIGHT, VK_UP, VK_DOWN, VK_TAB]);
end;
WM_KEYUP :
if Panel1.Focused then
begin
TempKeyEvent.kind := KEYEVENT_KEYUP;
TempKeyEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempKeyEvent.windows_key_code := Msg.wParam;
TempKeyEvent.native_key_code := Msg.lParam;
TempKeyEvent.is_system_key := ord(False);
TempKeyEvent.character := #0;
TempKeyEvent.unmodified_character := #0;
TempKeyEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempKeyEvent);
Handled := True;
end;
WM_CHAR :
if Panel1.Focused then
begin
TempKeyEvent.kind := KEYEVENT_CHAR;
TempKeyEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempKeyEvent.windows_key_code := Msg.wParam;
TempKeyEvent.native_key_code := Msg.lParam;
TempKeyEvent.is_system_key := ord(False);
TempKeyEvent.character := #0;
TempKeyEvent.unmodified_character := #0;
TempKeyEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempKeyEvent);
Handled := True;
end;
WM_MOUSEWHEEL :
if Panel1.Focused and (GlobalCEFApp <> nil) then
begin
TempMouseEvent.x := Msg.lParam and $FFFF;
TempMouseEvent.y := Msg.lParam shr 16;
TempMouseEvent.modifiers := GetCefMouseModifiers(Msg.wParam);
DeviceToLogical(TempMouseEvent, GlobalCEFApp.DeviceScaleFactor);
chrmosr.SendMouseWheelEvent(@TempMouseEvent, 0, int16(Msg.wParam shr 16));
end;
end;
end;
procedure TForm1.GoBtnClick(Sender: TObject);
begin
FResizeCS.Acquire;
FResizing := False;
FPendingResize := False;
FResizeCS.Release;
chrmosr.LoadURL(ComboBox1.Text);
end;
procedure TForm1.GoBtnEnter(Sender: TObject);
begin
chrmosr.SendFocusEvent(False);
end;
procedure TForm1.chrmosrAfterCreated(Sender: TObject; const browser: ICefBrowser);
begin
PostMessage(Handle, CEF_AFTERCREATED, 0, 0);
end;
procedure TForm1.chrmosrBeforeClose(Sender: TObject; const browser: ICefBrowser);
begin
FCanClose := True;
PostMessage(Handle, WM_CLOSE, 0, 0);
end;
procedure TForm1.chrmosrBeforePopup(Sender : TObject;
const browser : ICefBrowser;
const frame : ICefFrame;
const targetUrl : ustring;
const targetFrameName : ustring;
targetDisposition : TCefWindowOpenDisposition;
userGesture : Boolean;
const popupFeatures : TCefPopupFeatures;
var windowInfo : TCefWindowInfo;
var client : ICefClient;
var settings : TCefBrowserSettings;
var extra_info : ICefDictionaryValue;
var noJavascriptAccess : Boolean;
var Result : Boolean);
begin
// For simplicity, this demo blocks all popup windows and new tabs
Result := (targetDisposition in [WOD_NEW_FOREGROUND_TAB, WOD_NEW_BACKGROUND_TAB, WOD_NEW_POPUP, WOD_NEW_WINDOW]);
end;
procedure TForm1.chrmosrCursorChange(Sender : TObject;
const browser : ICefBrowser;
cursor : HICON;
cursorType : TCefCursorType;
const customCursorInfo : PCefCursorInfo);
begin
Panel1.Cursor := CefCursorToWindowsCursor(cursorType);
end;
procedure TForm1.chrmosrGetScreenInfo(Sender : TObject;
const browser : ICefBrowser;
var screenInfo : TCefScreenInfo;
out Result : Boolean);
var
TempRect : TCEFRect;
begin
if (GlobalCEFApp <> nil) then
begin
TempRect.x := 0;
TempRect.y := 0;
TempRect.width := DeviceToLogical(Panel1.Width, GlobalCEFApp.DeviceScaleFactor);
TempRect.height := DeviceToLogical(Panel1.Height, GlobalCEFApp.DeviceScaleFactor);
screenInfo.device_scale_factor := GlobalCEFApp.DeviceScaleFactor;
screenInfo.depth := 0;
screenInfo.depth_per_component := 0;
screenInfo.is_monochrome := Ord(False);
screenInfo.rect := TempRect;
screenInfo.available_rect := TempRect;
Result := True;
end
else
Result := False;
end;
procedure TForm1.chrmosrGetScreenPoint(Sender : TObject;
const browser : ICefBrowser;
viewX : Integer;
viewY : Integer;
var screenX : Integer;
var screenY : Integer;
out Result : Boolean);
var
TempScreenPt, TempViewPt : TPoint;
begin
if (GlobalCEFApp <> nil) then
begin
TempViewPt.x := LogicalToDevice(viewX, GlobalCEFApp.DeviceScaleFactor);
TempViewPt.y := LogicalToDevice(viewY, GlobalCEFApp.DeviceScaleFactor);
TempScreenPt := Panel1.ClientToScreen(TempViewPt);
screenX := TempScreenPt.x;
screenY := TempScreenPt.y;
Result := True;
end
else
Result := False;
end;
procedure TForm1.chrmosrGetViewRect(Sender : TObject;
const browser : ICefBrowser;
var rect : TCefRect);
begin
if (GlobalCEFApp <> nil) then
begin
rect.x := 0;
rect.y := 0;
rect.width := DeviceToLogical(Panel1.Width, GlobalCEFApp.DeviceScaleFactor);
rect.height := DeviceToLogical(Panel1.Height, GlobalCEFApp.DeviceScaleFactor);
end;
end;
procedure TForm1.chrmosrPaint( Sender : TObject;
const browser : ICefBrowser;
kind : TCefPaintElementType;
dirtyRectsCount : NativeUInt;
const dirtyRects : PCefRectArray;
const buffer : Pointer;
width : Integer;
height : Integer);
var
src, dst: PByte;
i, j, TempLineSize, TempSrcOffset, TempDstOffset, SrcStride, DstStride : Integer;
n : NativeUInt;
TempWidth, TempHeight, TempScanlineSize : integer;
TempBufferBits : Pointer;
TempForcedResize : boolean;
begin
try
FResizeCS.Acquire;
TempForcedResize := False;
if Panel1.BeginBufferDraw then
begin
if (kind = PET_POPUP) then
begin
if (FPopUpBitmap = nil) or
(width <> FPopUpBitmap.Width) or
(height <> FPopUpBitmap.Height) then
begin
if (FPopUpBitmap <> nil) then FPopUpBitmap.Free;
FPopUpBitmap := TBitmap.Create;
FPopUpBitmap.PixelFormat := pf32bit;
FPopUpBitmap.HandleType := bmDIB;
FPopUpBitmap.Width := width;
FPopUpBitmap.Height := height;
end;
TempWidth := FPopUpBitmap.Width;
TempHeight := FPopUpBitmap.Height;
TempScanlineSize := FPopUpBitmap.Width * SizeOf(TRGBQuad);
TempBufferBits := FPopUpBitmap.Scanline[pred(FPopUpBitmap.Height)];
end
else
begin
TempForcedResize := Panel1.UpdateBufferDimensions(Width, Height) or not(Panel1.BufferIsResized(False));
TempWidth := Panel1.BufferWidth;
TempHeight := Panel1.BufferHeight;
TempScanlineSize := Panel1.ScanlineSize;
TempBufferBits := Panel1.BufferBits;
end;
if (TempBufferBits <> nil) then
begin
SrcStride := Width * SizeOf(TRGBQuad);
DstStride := - TempScanlineSize;
n := 0;
while (n < dirtyRectsCount) do
begin
if (dirtyRects[n].x >= 0) and (dirtyRects[n].y >= 0) then
begin
TempLineSize := min(dirtyRects[n].width, TempWidth - dirtyRects[n].x) * SizeOf(TRGBQuad);
if (TempLineSize > 0) then
begin
TempSrcOffset := ((dirtyRects[n].y * Width) + dirtyRects[n].x) * SizeOf(TRGBQuad);
TempDstOffset := ((TempScanlineSize * pred(TempHeight)) - (dirtyRects[n].y * TempScanlineSize)) +
(dirtyRects[n].x * SizeOf(TRGBQuad));
src := @PByte(buffer)[TempSrcOffset];
dst := @PByte(TempBufferBits)[TempDstOffset];
i := 0;
j := min(dirtyRects[n].height, TempHeight - dirtyRects[n].y);
while (i < j) do
begin
Move(src^, dst^, TempLineSize);
Inc(dst, DstStride);
Inc(src, SrcStride);
inc(i);
end;
end;
end;
inc(n);
end;
if FShowPopup and (FPopUpBitmap <> nil) then
Panel1.BufferDraw(FPopUpRect.Left, FPopUpRect.Top, FPopUpBitmap);
end;
Panel1.EndBufferDraw;
Panel1.InvalidatePanel;
if (kind = PET_VIEW) then
begin
if TempForcedResize or FPendingResize then PostMessage(Handle, CEF_PENDINGRESIZE, 0, 0);
FResizing := False;
FPendingResize := False;
end;
end;
finally
FResizeCS.Release;
end;
end;
procedure TForm1.chrmosrPopupShow(Sender : TObject;
const browser : ICefBrowser;
show : Boolean);
begin
if show then
FShowPopUp := True
else
begin
FShowPopUp := False;
FPopUpRect := rect(0, 0, 0, 0);
if (chrmosr <> nil) then chrmosr.Invalidate(PET_VIEW);
end;
end;
procedure TForm1.chrmosrPopupSize(Sender : TObject;
const browser : ICefBrowser;
const rect : PCefRect);
begin
if (GlobalCEFApp <> nil) then
begin
LogicalToDevice(rect^, GlobalCEFApp.DeviceScaleFactor);
FPopUpRect.Left := rect.x;
FPopUpRect.Top := rect.y;
FPopUpRect.Right := rect.x + rect.width - 1;
FPopUpRect.Bottom := rect.y + rect.height - 1;
end;
end;
procedure TForm1.chrmosrTooltip(Sender: TObject; const browser: ICefBrowser; var text: ustring; out Result: Boolean);
begin
Panel1.hint := text;
Panel1.ShowHint := (length(text) > 0);
Result := True;
end;
procedure TForm1.ComboBox1Enter(Sender: TObject);
begin
chrmosr.SendFocusEvent(False);
end;
function TForm1.getModifiers(Shift: TShiftState): TCefEventFlags;
begin
Result := EVENTFLAG_NONE;
if (ssShift in Shift) then Result := Result or EVENTFLAG_SHIFT_DOWN;
if (ssAlt in Shift) then Result := Result or EVENTFLAG_ALT_DOWN;
if (ssCtrl in Shift) then Result := Result or EVENTFLAG_CONTROL_DOWN;
if (ssLeft in Shift) then Result := Result or EVENTFLAG_LEFT_MOUSE_BUTTON;
if (ssRight in Shift) then Result := Result or EVENTFLAG_RIGHT_MOUSE_BUTTON;
if (ssMiddle in Shift) then Result := Result or EVENTFLAG_MIDDLE_MOUSE_BUTTON;
end;
function TForm1.GetButton(Button: TMouseButton): TCefMouseButtonType;
begin
case Button of
TMouseButton.mbRight : Result := MBT_RIGHT;
TMouseButton.mbMiddle : Result := MBT_MIDDLE;
else Result := MBT_LEFT;
end;
end;
procedure TForm1.WMMove(var aMessage : TWMMove);
begin
inherited;
if (chrmosr <> nil) then chrmosr.NotifyMoveOrResizeStarted;
end;
procedure TForm1.WMMoving(var aMessage : TMessage);
begin
inherited;
if (chrmosr <> nil) then chrmosr.NotifyMoveOrResizeStarted;
end;
procedure TForm1.WMCaptureChanged(var aMessage : TMessage);
begin
inherited;
if (chrmosr <> nil) then chrmosr.SendCaptureLostEvent;
end;
procedure TForm1.WMCancelMode(var aMessage : TMessage);
begin
inherited;
if (chrmosr <> nil) then chrmosr.SendCaptureLostEvent;
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;
procedure TForm1.BrowserCreatedMsg(var aMessage : TMessage);
begin
Caption := 'Simple OSR Browser';
NavControlPnl.Enabled := True;
GoBtn.Click;
end;
procedure TForm1.FormAfterMonitorDpiChanged(Sender: TObject; OldDPI, NewDPI: Integer);
begin
if (chrmosr <> nil) then
begin
chrmosr.NotifyScreenInfoChanged;
chrmosr.WasResized;
end;
end;
procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
CanClose := FCanClose;
if not(FClosing) then
begin
FClosing := True;
Visible := False;
chrmosr.CloseBrowser(True);
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
FPopUpBitmap := nil;
FPopUpRect := rect(0, 0, 0, 0);
FShowPopUp := False;
FResizing := False;
FPendingResize := False;
FCanClose := False;
FClosing := False;
FDeviceBounds := nil;
FSelectedRange.from := 0;
FSelectedRange.to_ := 0;
FResizeCS := TCriticalSection.Create;
FIMECS := TCriticalSection.Create;
Panel1.Transparent := TRANSPARENT_BROWSER;
InitializeLastClick;
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
chrmosr.ShutdownDragAndDrop;
if (FPopUpBitmap <> nil) then FreeAndNil(FPopUpBitmap);
if (FResizeCS <> nil) then FreeAndNil(FResizeCS);
if (FIMECS <> nil) then FreeAndNil(FIMECS);
if (FDeviceBounds <> nil) then
begin
Finalize(FDeviceBounds);
FDeviceBounds := nil;
end;
end;
procedure TForm1.FormHide(Sender: TObject);
begin
chrmosr.SendFocusEvent(False);
chrmosr.WasHidden(True);
end;
procedure TForm1.FormShow(Sender: TObject);
begin
if chrmosr.Initialized then
begin
chrmosr.WasHidden(False);
chrmosr.SendFocusEvent(True);
end
else
begin
// If you need transparency leave the chrmosr.Options.BackgroundColor property
// with the default value or set the alpha channel to 0
if TRANSPARENT_BROWSER then
chrmosr.Options.BackgroundColor := CefColorSetARGB($00, $FF, $FF, $FF)
else
chrmosr.Options.BackgroundColor := CefColorSetARGB($FF, $FF, $FF, $FF);
// The IME handler needs to be created when Panel1 has a valid handle
// and before the browser creation.
// You can skip this if the user doesn't need an "Input Method Editor".
Panel1.CreateIMEHandler;
if chrmosr.CreateBrowser(nil, '') then
chrmosr.InitializeDragAndDrop(Panel1)
else
Timer1.Enabled := True;
end;
end;
procedure TForm1.Panel1Click(Sender: TObject);
begin
Panel1.SetFocus;
end;
procedure TForm1.Panel1MouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
TempEvent : TCefMouseEvent;
TempTime : integer;
begin
if (GlobalCEFApp <> nil) and (chrmosr <> nil) then
begin
Panel1.SetFocus;
if not(CancelPreviousClick(x, y, TempTime)) and (Button = FLastClickButton) then
inc(FLastClickCount)
else
begin
FLastClickPoint.x := x;
FLastClickPoint.y := y;
FLastClickCount := 1;
end;
FLastClickTime := TempTime;
FLastClickButton := Button;
TempEvent.x := X;
TempEvent.y := Y;
TempEvent.modifiers := getModifiers(Shift);
DeviceToLogical(TempEvent, GlobalCEFApp.DeviceScaleFactor);
chrmosr.SendMouseClickEvent(@TempEvent, GetButton(Button), False, FLastClickCount);
end;
end;
procedure TForm1.Panel1MouseLeave(Sender: TObject);
var
TempEvent : TCefMouseEvent;
TempPoint : TPoint;
TempTime : integer;
begin
if (GlobalCEFApp <> nil) and (chrmosr <> nil) then
begin
GetCursorPos(TempPoint);
TempPoint := Panel1.ScreenToclient(TempPoint);
if CancelPreviousClick(TempPoint.x, TempPoint.y, TempTime) then InitializeLastClick;
TempEvent.x := TempPoint.x;
TempEvent.y := TempPoint.y;
TempEvent.modifiers := GetCefMouseModifiers;
DeviceToLogical(TempEvent, GlobalCEFApp.DeviceScaleFactor);
chrmosr.SendMouseMoveEvent(@TempEvent, True);
end;
end;
procedure TForm1.Panel1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
var
TempEvent : TCefMouseEvent;
TempTime : integer;
begin
if (GlobalCEFApp <> nil) and (chrmosr <> nil) then
begin
if CancelPreviousClick(x, y, TempTime) then InitializeLastClick;
TempEvent.x := x;
TempEvent.y := y;
TempEvent.modifiers := getModifiers(Shift);
DeviceToLogical(TempEvent, GlobalCEFApp.DeviceScaleFactor);
chrmosr.SendMouseMoveEvent(@TempEvent, False);
end;
end;
procedure TForm1.Panel1MouseUp(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
TempEvent : TCefMouseEvent;
begin
if (GlobalCEFApp <> nil) and (chrmosr <> nil) then
begin
TempEvent.x := X;
TempEvent.y := Y;
TempEvent.modifiers := getModifiers(Shift);
DeviceToLogical(TempEvent, GlobalCEFApp.DeviceScaleFactor);
chrmosr.SendMouseClickEvent(@TempEvent, GetButton(Button), True, FLastClickCount);
end;
end;
procedure TForm1.Panel1PaintParentBkg(Sender: TObject);
begin
// This event should only be used if you enabled transparency in the browser
if TRANSPARENT_BROWSER then
begin
// This event should copy the background image into Panel1.Canvas
// The TBufferPanel uses "AlphaBlend" to draw the browser contents over
// this background image.
// For simplicity, we just paint it green.
Panel1.Canvas.Brush.Color := clGreen;
Panel1.Canvas.Brush.Style := bsSolid;
Panel1.Canvas.FillRect(Rect(0, 0, Panel1.Width, Panel1.Height));
end;
end;
procedure TForm1.Panel1Resize(Sender: TObject);
begin
DoResize;
end;
procedure TForm1.PendingResizeMsg(var aMessage : TMessage);
begin
DoResize;
end;
procedure TForm1.RangeChangedMsg(var aMessage : TMessage);
begin
try
FIMECS.Acquire;
Panel1.ChangeCompositionRange(FSelectedRange, FDeviceBounds);
finally
FIMECS.Release;
end;
end;
procedure TForm1.DoResize;
begin
try
FResizeCS.Acquire;
if FResizing then
FPendingResize := True
else
if Panel1.BufferIsResized then
chrmosr.Invalidate(PET_VIEW)
else
begin
FResizing := True;
chrmosr.WasResized;
end;
finally
FResizeCS.Release;
end;
end;
procedure TForm1.InitializeLastClick;
begin
FLastClickCount := 0;
FLastClickTime := 0;
FLastClickPoint.x := 0;
FLastClickPoint.y := 0;
FLastClickButton := mbLeft;
end;
function TForm1.CancelPreviousClick(x, y : integer; var aCurrentTime : integer) : boolean;
begin
aCurrentTime := GetMessageTime;
Result := (abs(FLastClickPoint.x - x) > (GetSystemMetrics(SM_CXDOUBLECLK) div 2)) or
(abs(FLastClickPoint.y - y) > (GetSystemMetrics(SM_CYDOUBLECLK) div 2)) or
(cardinal(aCurrentTime - FLastClickTime) > GetDoubleClickTime);
end;
procedure TForm1.Panel1Enter(Sender: TObject);
begin
chrmosr.SendFocusEvent(True);
end;
procedure TForm1.Panel1Exit(Sender: TObject);
begin
chrmosr.SendFocusEvent(False);
end;
procedure TForm1.SnapshotBtnClick(Sender: TObject);
begin
if SaveDialog1.Execute then Panel1.SaveToFile(SaveDialog1.FileName);
end;
procedure TForm1.SnapshotBtnEnter(Sender: TObject);
begin
chrmosr.SendFocusEvent(False);
end;
procedure TForm1.Timer1Timer(Sender: TObject);
begin
Timer1.Enabled := False;
if chrmosr.CreateBrowser(nil, '') then
chrmosr.InitializeDragAndDrop(Panel1)
else
if not(chrmosr.Initialized) then Timer1.Enabled := True;
end;
procedure TForm1.chrmosrIMECompositionRangeChanged( Sender : TObject;
const browser : ICefBrowser;
const selected_range : PCefRange;
character_boundsCount : NativeUInt;
const character_bounds : PCefRect);
var
TempPRect : PCefRect;
i : NativeUInt;
begin
try
FIMECS.Acquire;
// TChromium.OnIMECompositionRangeChanged is triggered in a different thread
// and all functions using a IMM context need to be executed in the same
// thread, in this case the main thread. We need to save the parameters and
// send a message to the form to execute Panel1.ChangeCompositionRange in
// the main thread.
if (FDeviceBounds <> nil) then
begin
Finalize(FDeviceBounds);
FDeviceBounds := nil;
end;
FSelectedRange := selected_range^;
if (character_boundsCount > 0) then
begin
SetLength(FDeviceBounds, character_boundsCount);
i := 0;
TempPRect := character_bounds;
while (i < character_boundsCount) do
begin
FDeviceBounds[i] := TempPRect^;
LogicalToDevice(FDeviceBounds[i], GlobalCEFApp.DeviceScaleFactor);
inc(TempPRect);
inc(i);
end;
end;
PostMessage(Handle, CEF_IMERANGECHANGED, 0, 0);
finally
FIMECS.Release;
end;
end;
procedure TForm1.Panel1IMECancelComposition(Sender: TObject);
begin
chrmosr.IMECancelComposition;
end;
procedure TForm1.Panel1IMECommitText( Sender : TObject;
const aText : ustring;
const replacement_range : PCefRange;
relative_cursor_pos : Integer);
begin
chrmosr.IMECommitText(aText, replacement_range, relative_cursor_pos);
end;
procedure TForm1.Panel1IMESetComposition( Sender : TObject;
const aText : ustring;
const underlines : TCefCompositionUnderlineDynArray;
const replacement_range : TCefRange;
const selection_range : TCefRange);
begin
chrmosr.IMESetComposition(aText, underlines, @replacement_range, @selection_range);
end;
end.