Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / Controls / ActiveXSite.cs / 1305600 / ActiveXSite.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using Microsoft.Win32;
using System.Windows;
using System.Windows.Interop;
using MS.Internal.Controls;
using MS.Internal;
using MS.Internal.PresentationFramework;
using MS.Win32;
using System.Security ;
using System.Security.Permissions;
using System.Windows.Controls;
namespace MS.Internal.Controls
{
///
/// This class implements the necessary interfaces required for an ActiveX site.
///
///
/// THREADING ISSUE: See comment on WebBrowserSite.
///
///
/// WebOCHostedInBrowserProcess - defense in depth:
/// These interface implementations are exposed across a security boundary. We must not allow a
/// compromised low-integrity-level browser process to gain elevation of privilege via our process or
/// tamper with its state. (Attacking the WebOC via this interface is not interesting, because the WebOC
/// is directly accessible in the browser process.) Each interface implementation method must be
/// carefully reviewed to ensure that it cannot be abused by disclosing protected resources or by passing
/// malicious data to it.
///
internal class ActiveXSite :
UnsafeNativeMethods.IOleControlSite,
UnsafeNativeMethods.IOleClientSite,
UnsafeNativeMethods.IOleInPlaceSite,
UnsafeNativeMethods.IPropertyNotifySink
{
#region Constructor
//
// The constructor takes an ActiveXHost as a parameter, so unfortunately,
// this cannot be used as a standalone site. It has to be used in conjunction
// with ActiveXHost. Perhaps we can change it in future.
//
///
/// Critical - stores ActiveXHost - critical data.
///
[SecurityCritical ]
internal ActiveXSite(ActiveXHost host)
{
if (host == null)
{
throw new ArgumentNullException("host");
}
_host = host;
}
#endregion Constructor
//
// IOleControlSite methods:
//
#region IOleControlSite
int UnsafeNativeMethods.IOleControlSite.OnControlInfoChanged()
{
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleControlSite.LockInPlaceActive(int fLock)
{
return NativeMethods.E_NOTIMPL;
}
int UnsafeNativeMethods.IOleControlSite.GetExtendedControl(out object ppDisp)
{
ppDisp = null;
return NativeMethods.E_NOTIMPL;
}
int UnsafeNativeMethods.IOleControlSite.TransformCoords(NativeMethods.POINT pPtlHimetric, NativeMethods.POINTF pPtfContainer, int dwFlags)
{
if ((dwFlags & NativeMethods.XFORMCOORDS_HIMETRICTOCONTAINER) != 0) {
if ((dwFlags & NativeMethods.XFORMCOORDS_SIZE) != 0) {
pPtfContainer.x = (float)ActiveXHelper.HM2Pix(pPtlHimetric.x, ActiveXHelper.LogPixelsX);
pPtfContainer.y = (float)ActiveXHelper.HM2Pix(pPtlHimetric.y, ActiveXHelper.LogPixelsY);
}
else if ((dwFlags & NativeMethods.XFORMCOORDS_POSITION) != 0) {
pPtfContainer.x = (float)ActiveXHelper.HM2Pix(pPtlHimetric.x, ActiveXHelper.LogPixelsX);
pPtfContainer.y = (float)ActiveXHelper.HM2Pix(pPtlHimetric.y, ActiveXHelper.LogPixelsY);
}
else {
return NativeMethods.E_INVALIDARG;
}
}
else if ((dwFlags & NativeMethods.XFORMCOORDS_CONTAINERTOHIMETRIC) != 0) {
if ((dwFlags & NativeMethods.XFORMCOORDS_SIZE) != 0) {
pPtlHimetric.x = ActiveXHelper.Pix2HM((int)pPtfContainer.x, ActiveXHelper.LogPixelsX);
pPtlHimetric.y = ActiveXHelper.Pix2HM((int)pPtfContainer.y, ActiveXHelper.LogPixelsY);
}
else if ((dwFlags & NativeMethods.XFORMCOORDS_POSITION) != 0) {
pPtlHimetric.x = ActiveXHelper.Pix2HM((int)pPtfContainer.x, ActiveXHelper.LogPixelsX);
pPtlHimetric.y = ActiveXHelper.Pix2HM((int)pPtfContainer.y, ActiveXHelper.LogPixelsY);
}
else {
return NativeMethods.E_INVALIDARG;
}
}
else {
return NativeMethods.E_INVALIDARG;
}
return NativeMethods.S_OK;
}
///
/// Critical - calls critical Host property
///
[SecurityCritical]
int UnsafeNativeMethods.IOleClientSite.GetContainer(out UnsafeNativeMethods.IOleContainer container)
{
container = this.Host.Container;
return NativeMethods.S_OK;
}
///
/// Critical - calls critical Host property and critical methods AttachWindow
///
[SecurityCritical]
int UnsafeNativeMethods.IOleClientSite.ShowObject()
{
if ( HostState >= ActiveXHelper.ActiveXState.InPlaceActive)
{
IntPtr hwnd;
if (NativeMethods.Succeeded(this.Host.ActiveXInPlaceObject.GetWindow(out hwnd)))
{
if (this.Host.ControlHandle.Handle != hwnd)
{
if (hwnd != IntPtr.Zero)
{
this.Host.AttachWindow(hwnd);
this.OnActiveXRectChange(this.Host.Bounds);
}
}
}
else if (this.Host.ActiveXInPlaceObject is UnsafeNativeMethods.IOleInPlaceObjectWindowless)
{
throw new InvalidOperationException(SR.Get(SRID.AxWindowlessControl));
}
}
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleClientSite.OnShowWindow(int fShow)
{
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleClientSite.RequestNewObjectLayout()
{
return NativeMethods.E_NOTIMPL;
}
#endregion IOleClientSite
//
// IOleInPlaceSite methods:
//
#region IOleInPlaceSite
///
/// Critical - Calls critical code.
///
[ SecurityCritical ]
IntPtr UnsafeNativeMethods.IOleInPlaceSite.GetWindow()
{
try
{
return this.Host.ParentHandle.Handle;
}
catch (Exception t)
{
Debug.Fail(t.ToString());
throw t;
}
}
int UnsafeNativeMethods.IOleInPlaceSite.ContextSensitiveHelp(int fEnterMode)
{
return NativeMethods.E_NOTIMPL;
}
int UnsafeNativeMethods.IOleInPlaceSite.CanInPlaceActivate()
{
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleInPlaceSite.OnInPlaceActivate()
{
HostState = ActiveXHelper.ActiveXState.InPlaceActive;
if (!HostBounds.IsEmpty)
{
this.OnActiveXRectChange(HostBounds);
}
return NativeMethods.S_OK;
}
///
/// Critical - calls critical Host property
///
[SecurityCritical]
int UnsafeNativeMethods.IOleInPlaceSite.OnUIActivate()
{
HostState = ActiveXHelper.ActiveXState.UIActive;
this.Host.Container.OnUIActivate(this.Host);
return NativeMethods.S_OK;
}
///
/// Critical - accesses ParentHandle - critical data.
///
[SecurityCritical ]
int UnsafeNativeMethods.IOleInPlaceSite.GetWindowContext(out UnsafeNativeMethods.IOleInPlaceFrame ppFrame, out UnsafeNativeMethods.IOleInPlaceUIWindow ppDoc,
NativeMethods.COMRECT lprcPosRect, NativeMethods.COMRECT lprcClipRect, NativeMethods.OLEINPLACEFRAMEINFO lpFrameInfo)
{
ppDoc = null;
ppFrame = this.Host.Container;
lprcPosRect.left = (int) this.Host.Bounds.left;
lprcPosRect.top = (int) this.Host.Bounds.top;
lprcPosRect.right = (int) this.Host.Bounds.right;
lprcPosRect.bottom = (int) this.Host.Bounds.bottom;
lprcClipRect = this.Host.Bounds;
if (lpFrameInfo != null)
{
lpFrameInfo.cb = (uint)Marshal.SizeOf(typeof(NativeMethods.OLEINPLACEFRAMEINFO));
lpFrameInfo.fMDIApp = false;
lpFrameInfo.hAccel = IntPtr.Zero;
lpFrameInfo.cAccelEntries = 0;
lpFrameInfo.hwndFrame = this.Host.ParentHandle.Handle;
}
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleInPlaceSite.Scroll(NativeMethods.SIZE scrollExtant)
{
return NativeMethods.S_FALSE;
}
///
/// Critical - calls critical Host property
///
[SecurityCritical]
int UnsafeNativeMethods.IOleInPlaceSite.OnUIDeactivate(int fUndoable)
{
this.Host.Container.OnUIDeactivate(this.Host);
if ( HostState > ActiveXHelper.ActiveXState.InPlaceActive)
{
HostState = ActiveXHelper.ActiveXState.InPlaceActive;
}
return NativeMethods.S_OK;
}
///
/// Critical - calls critical Host property
///
[SecurityCritical]
int UnsafeNativeMethods.IOleInPlaceSite.OnInPlaceDeactivate()
{
if (HostState == ActiveXHelper.ActiveXState.UIActive)
{
((UnsafeNativeMethods.IOleInPlaceSite)this).OnUIDeactivate(0);
}
this.Host.Container.OnInPlaceDeactivate(this.Host);
HostState = ActiveXHelper.ActiveXState.Running;
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleInPlaceSite.DiscardUndoState()
{
return NativeMethods.S_OK;
}
///
/// Critical - calls critical Host property
///
[SecurityCritical]
int UnsafeNativeMethods.IOleInPlaceSite.DeactivateAndUndo()
{
return this.Host.ActiveXInPlaceObject.UIDeactivate();
}
int UnsafeNativeMethods.IOleInPlaceSite.OnPosRectChange(NativeMethods.COMRECT lprcPosRect)
{
return this.OnActiveXRectChange(lprcPosRect);
}
#endregion IOleInPlaceSite
///
/// Critical - calls Host property.
/// TreatAsSafe - for get - returning current activeXstate is considered safe.
/// for set - although you are affecting what code runs.
/// instantiating the control is the critical thing. Once the control is started.
/// transitioning between states no more risky than instantiation.
///
ActiveXHelper.ActiveXState HostState
{
[SecurityCritical, SecurityTreatAsSafe ]
get
{
return this.Host.ActiveXState ;
}
[SecurityCritical, SecurityTreatAsSafe ]
set
{
this.Host.ActiveXState = value ;
}
}
///
/// Critical - calls Host property.
/// TreatAsSafe - for get - returning host bounds is considered safe.
///
internal NativeMethods.COMRECT HostBounds
{
[ SecurityCritical, SecurityTreatAsSafe ]
get
{
return this.Host.Bounds;
}
}
//
// IPropertyNotifySink methods:
//
#region IPropertyNotifySink
///
/// WebOCHostedInBrowserProcess: We could get spurious property change notifications.
/// But the WebBrowser control doesn't rely on any currently.
///
[SecurityCritical]
void UnsafeNativeMethods.IPropertyNotifySink.OnChanged(int dispid)
{
// Some controls fire OnChanged() notifications when getting values of some properties. ASURT 20190.
// To prevent this kind of recursion, we check to see if we are already inside a OnChanged() call.
//
//
//
try
{
OnPropertyChanged(dispid);
}
catch (Exception t)
{
Debug.Fail(t.ToString());
throw t;
}
finally
{
//this.Host.NoComponentChangeEvents--;
}
}
int UnsafeNativeMethods.IPropertyNotifySink.OnRequestEdit(int dispid)
{
return NativeMethods.S_OK;
}
#endregion IPropertyNotifySink
#region Protected Methods
//
// Virtual overrides:
//
///
/// WebOCHostedInBrowserProcess: We could get spurious property change notifications.
/// But the WebBrowser control doesn't rely on any currently.
///
[SecurityCritical]
internal virtual void OnPropertyChanged(int dispid)
{
/*
try {
ISite site = this.Host.Site;
if (site != null) {
IComponentChangeService changeService = (IComponentChangeService)site.GetService(typeof(IComponentChangeService));
if (changeService != null) {
try {
changeService.OnComponentChanging(this.Host, null);
}
catch (CheckoutException coEx) {
if (coEx == CheckoutException.Canceled) {
return;
}
throw coEx;
}
// Now notify the change service that the change was successful.
//
changeService.OnComponentChanged(this.Host, null, null, null);
}
}
}
catch (Exception t) {
Debug.Fail(t.ToString());
throw t;
}
*/
}
#endregion Protected Methods
#region Internal Properties
/// Retrieves the ActiveXHost object set in the constructor.
///
/// Critical - returns critical data.
///
internal ActiveXHost Host
{
[ SecurityCritical]
get { return _host; }
}
#endregion Internal Properties
#region Internal Methods
//
// Internal helper methods:
//
// Commented out until it is needed to comply with FXCOP
/////
///// Critical - returns critical data.
/////
//[SecurityCritical ]
//internal ActiveXHost GetAxHost()
//{
// return this.Host;
//}
///
/// Critical - instantiates ConnectionPointCoookie - a critical class.
///
[ SecurityCritical ]
internal void StartEvents()
{
if (_connectionPoint != null)
return;
//
Object nativeObject = this.Host.ActiveXInstance;
if (nativeObject != null)
{
try
{
_connectionPoint = new ConnectionPointCookie(nativeObject, this, typeof(UnsafeNativeMethods.IPropertyNotifySink));
}
catch (Exception ex)
{
if (CriticalExceptions.IsCriticalException(ex))
{
throw;
}
}
}
}
///
/// Critical - calls critical _connectionPoint property
/// NOT TAS - stopping listening to events - could turn off some mitigations.
///
[ SecurityCritical ]
internal void StopEvents()
{
if (_connectionPoint != null)
{
_connectionPoint.Disconnect();
_connectionPoint = null;
}
}
///
/// Critical - calls critical Host property
/// TreatAsSafe - changing the size of the control is considered safe.
///
[SecurityCritical, SecurityTreatAsSafe ]
internal int OnActiveXRectChange(NativeMethods.COMRECT lprcPosRect)
{
if (this.Host.ActiveXInPlaceObject != null)
{
this.Host.ActiveXInPlaceObject.SetObjectRects(
lprcPosRect,
lprcPosRect); //Same clip rect
this.Host.Bounds = lprcPosRect;
}
return NativeMethods.S_OK;
}
#endregion Internal Methods
#region Private Fields
///
/// Critical - contains critical data.
///
[SecurityCritical ]
private ActiveXHost _host;
///
/// Critical - contains critical data.
///
[SecurityCritical ]
private ConnectionPointCookie _connectionPoint;
#endregion Private Fields
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using Microsoft.Win32;
using System.Windows;
using System.Windows.Interop;
using MS.Internal.Controls;
using MS.Internal;
using MS.Internal.PresentationFramework;
using MS.Win32;
using System.Security ;
using System.Security.Permissions;
using System.Windows.Controls;
namespace MS.Internal.Controls
{
///
/// This class implements the necessary interfaces required for an ActiveX site.
///
///
/// THREADING ISSUE: See comment on WebBrowserSite.
///
///
/// WebOCHostedInBrowserProcess - defense in depth:
/// These interface implementations are exposed across a security boundary. We must not allow a
/// compromised low-integrity-level browser process to gain elevation of privilege via our process or
/// tamper with its state. (Attacking the WebOC via this interface is not interesting, because the WebOC
/// is directly accessible in the browser process.) Each interface implementation method must be
/// carefully reviewed to ensure that it cannot be abused by disclosing protected resources or by passing
/// malicious data to it.
///
internal class ActiveXSite :
UnsafeNativeMethods.IOleControlSite,
UnsafeNativeMethods.IOleClientSite,
UnsafeNativeMethods.IOleInPlaceSite,
UnsafeNativeMethods.IPropertyNotifySink
{
#region Constructor
//
// The constructor takes an ActiveXHost as a parameter, so unfortunately,
// this cannot be used as a standalone site. It has to be used in conjunction
// with ActiveXHost. Perhaps we can change it in future.
//
///
/// Critical - stores ActiveXHost - critical data.
///
[SecurityCritical ]
internal ActiveXSite(ActiveXHost host)
{
if (host == null)
{
throw new ArgumentNullException("host");
}
_host = host;
}
#endregion Constructor
//
// IOleControlSite methods:
//
#region IOleControlSite
int UnsafeNativeMethods.IOleControlSite.OnControlInfoChanged()
{
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleControlSite.LockInPlaceActive(int fLock)
{
return NativeMethods.E_NOTIMPL;
}
int UnsafeNativeMethods.IOleControlSite.GetExtendedControl(out object ppDisp)
{
ppDisp = null;
return NativeMethods.E_NOTIMPL;
}
int UnsafeNativeMethods.IOleControlSite.TransformCoords(NativeMethods.POINT pPtlHimetric, NativeMethods.POINTF pPtfContainer, int dwFlags)
{
if ((dwFlags & NativeMethods.XFORMCOORDS_HIMETRICTOCONTAINER) != 0) {
if ((dwFlags & NativeMethods.XFORMCOORDS_SIZE) != 0) {
pPtfContainer.x = (float)ActiveXHelper.HM2Pix(pPtlHimetric.x, ActiveXHelper.LogPixelsX);
pPtfContainer.y = (float)ActiveXHelper.HM2Pix(pPtlHimetric.y, ActiveXHelper.LogPixelsY);
}
else if ((dwFlags & NativeMethods.XFORMCOORDS_POSITION) != 0) {
pPtfContainer.x = (float)ActiveXHelper.HM2Pix(pPtlHimetric.x, ActiveXHelper.LogPixelsX);
pPtfContainer.y = (float)ActiveXHelper.HM2Pix(pPtlHimetric.y, ActiveXHelper.LogPixelsY);
}
else {
return NativeMethods.E_INVALIDARG;
}
}
else if ((dwFlags & NativeMethods.XFORMCOORDS_CONTAINERTOHIMETRIC) != 0) {
if ((dwFlags & NativeMethods.XFORMCOORDS_SIZE) != 0) {
pPtlHimetric.x = ActiveXHelper.Pix2HM((int)pPtfContainer.x, ActiveXHelper.LogPixelsX);
pPtlHimetric.y = ActiveXHelper.Pix2HM((int)pPtfContainer.y, ActiveXHelper.LogPixelsY);
}
else if ((dwFlags & NativeMethods.XFORMCOORDS_POSITION) != 0) {
pPtlHimetric.x = ActiveXHelper.Pix2HM((int)pPtfContainer.x, ActiveXHelper.LogPixelsX);
pPtlHimetric.y = ActiveXHelper.Pix2HM((int)pPtfContainer.y, ActiveXHelper.LogPixelsY);
}
else {
return NativeMethods.E_INVALIDARG;
}
}
else {
return NativeMethods.E_INVALIDARG;
}
return NativeMethods.S_OK;
}
///
/// Critical - calls critical Host property
///
[SecurityCritical]
int UnsafeNativeMethods.IOleClientSite.GetContainer(out UnsafeNativeMethods.IOleContainer container)
{
container = this.Host.Container;
return NativeMethods.S_OK;
}
///
/// Critical - calls critical Host property and critical methods AttachWindow
///
[SecurityCritical]
int UnsafeNativeMethods.IOleClientSite.ShowObject()
{
if ( HostState >= ActiveXHelper.ActiveXState.InPlaceActive)
{
IntPtr hwnd;
if (NativeMethods.Succeeded(this.Host.ActiveXInPlaceObject.GetWindow(out hwnd)))
{
if (this.Host.ControlHandle.Handle != hwnd)
{
if (hwnd != IntPtr.Zero)
{
this.Host.AttachWindow(hwnd);
this.OnActiveXRectChange(this.Host.Bounds);
}
}
}
else if (this.Host.ActiveXInPlaceObject is UnsafeNativeMethods.IOleInPlaceObjectWindowless)
{
throw new InvalidOperationException(SR.Get(SRID.AxWindowlessControl));
}
}
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleClientSite.OnShowWindow(int fShow)
{
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleClientSite.RequestNewObjectLayout()
{
return NativeMethods.E_NOTIMPL;
}
#endregion IOleClientSite
//
// IOleInPlaceSite methods:
//
#region IOleInPlaceSite
///
/// Critical - Calls critical code.
///
[ SecurityCritical ]
IntPtr UnsafeNativeMethods.IOleInPlaceSite.GetWindow()
{
try
{
return this.Host.ParentHandle.Handle;
}
catch (Exception t)
{
Debug.Fail(t.ToString());
throw t;
}
}
int UnsafeNativeMethods.IOleInPlaceSite.ContextSensitiveHelp(int fEnterMode)
{
return NativeMethods.E_NOTIMPL;
}
int UnsafeNativeMethods.IOleInPlaceSite.CanInPlaceActivate()
{
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleInPlaceSite.OnInPlaceActivate()
{
HostState = ActiveXHelper.ActiveXState.InPlaceActive;
if (!HostBounds.IsEmpty)
{
this.OnActiveXRectChange(HostBounds);
}
return NativeMethods.S_OK;
}
///
/// Critical - calls critical Host property
///
[SecurityCritical]
int UnsafeNativeMethods.IOleInPlaceSite.OnUIActivate()
{
HostState = ActiveXHelper.ActiveXState.UIActive;
this.Host.Container.OnUIActivate(this.Host);
return NativeMethods.S_OK;
}
///
/// Critical - accesses ParentHandle - critical data.
///
[SecurityCritical ]
int UnsafeNativeMethods.IOleInPlaceSite.GetWindowContext(out UnsafeNativeMethods.IOleInPlaceFrame ppFrame, out UnsafeNativeMethods.IOleInPlaceUIWindow ppDoc,
NativeMethods.COMRECT lprcPosRect, NativeMethods.COMRECT lprcClipRect, NativeMethods.OLEINPLACEFRAMEINFO lpFrameInfo)
{
ppDoc = null;
ppFrame = this.Host.Container;
lprcPosRect.left = (int) this.Host.Bounds.left;
lprcPosRect.top = (int) this.Host.Bounds.top;
lprcPosRect.right = (int) this.Host.Bounds.right;
lprcPosRect.bottom = (int) this.Host.Bounds.bottom;
lprcClipRect = this.Host.Bounds;
if (lpFrameInfo != null)
{
lpFrameInfo.cb = (uint)Marshal.SizeOf(typeof(NativeMethods.OLEINPLACEFRAMEINFO));
lpFrameInfo.fMDIApp = false;
lpFrameInfo.hAccel = IntPtr.Zero;
lpFrameInfo.cAccelEntries = 0;
lpFrameInfo.hwndFrame = this.Host.ParentHandle.Handle;
}
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleInPlaceSite.Scroll(NativeMethods.SIZE scrollExtant)
{
return NativeMethods.S_FALSE;
}
///
/// Critical - calls critical Host property
///
[SecurityCritical]
int UnsafeNativeMethods.IOleInPlaceSite.OnUIDeactivate(int fUndoable)
{
this.Host.Container.OnUIDeactivate(this.Host);
if ( HostState > ActiveXHelper.ActiveXState.InPlaceActive)
{
HostState = ActiveXHelper.ActiveXState.InPlaceActive;
}
return NativeMethods.S_OK;
}
///
/// Critical - calls critical Host property
///
[SecurityCritical]
int UnsafeNativeMethods.IOleInPlaceSite.OnInPlaceDeactivate()
{
if (HostState == ActiveXHelper.ActiveXState.UIActive)
{
((UnsafeNativeMethods.IOleInPlaceSite)this).OnUIDeactivate(0);
}
this.Host.Container.OnInPlaceDeactivate(this.Host);
HostState = ActiveXHelper.ActiveXState.Running;
return NativeMethods.S_OK;
}
int UnsafeNativeMethods.IOleInPlaceSite.DiscardUndoState()
{
return NativeMethods.S_OK;
}
///
/// Critical - calls critical Host property
///
[SecurityCritical]
int UnsafeNativeMethods.IOleInPlaceSite.DeactivateAndUndo()
{
return this.Host.ActiveXInPlaceObject.UIDeactivate();
}
int UnsafeNativeMethods.IOleInPlaceSite.OnPosRectChange(NativeMethods.COMRECT lprcPosRect)
{
return this.OnActiveXRectChange(lprcPosRect);
}
#endregion IOleInPlaceSite
///
/// Critical - calls Host property.
/// TreatAsSafe - for get - returning current activeXstate is considered safe.
/// for set - although you are affecting what code runs.
/// instantiating the control is the critical thing. Once the control is started.
/// transitioning between states no more risky than instantiation.
///
ActiveXHelper.ActiveXState HostState
{
[SecurityCritical, SecurityTreatAsSafe ]
get
{
return this.Host.ActiveXState ;
}
[SecurityCritical, SecurityTreatAsSafe ]
set
{
this.Host.ActiveXState = value ;
}
}
///
/// Critical - calls Host property.
/// TreatAsSafe - for get - returning host bounds is considered safe.
///
internal NativeMethods.COMRECT HostBounds
{
[ SecurityCritical, SecurityTreatAsSafe ]
get
{
return this.Host.Bounds;
}
}
//
// IPropertyNotifySink methods:
//
#region IPropertyNotifySink
///
/// WebOCHostedInBrowserProcess: We could get spurious property change notifications.
/// But the WebBrowser control doesn't rely on any currently.
///
[SecurityCritical]
void UnsafeNativeMethods.IPropertyNotifySink.OnChanged(int dispid)
{
// Some controls fire OnChanged() notifications when getting values of some properties. ASURT 20190.
// To prevent this kind of recursion, we check to see if we are already inside a OnChanged() call.
//
//
//
try
{
OnPropertyChanged(dispid);
}
catch (Exception t)
{
Debug.Fail(t.ToString());
throw t;
}
finally
{
//this.Host.NoComponentChangeEvents--;
}
}
int UnsafeNativeMethods.IPropertyNotifySink.OnRequestEdit(int dispid)
{
return NativeMethods.S_OK;
}
#endregion IPropertyNotifySink
#region Protected Methods
//
// Virtual overrides:
//
///
/// WebOCHostedInBrowserProcess: We could get spurious property change notifications.
/// But the WebBrowser control doesn't rely on any currently.
///
[SecurityCritical]
internal virtual void OnPropertyChanged(int dispid)
{
/*
try {
ISite site = this.Host.Site;
if (site != null) {
IComponentChangeService changeService = (IComponentChangeService)site.GetService(typeof(IComponentChangeService));
if (changeService != null) {
try {
changeService.OnComponentChanging(this.Host, null);
}
catch (CheckoutException coEx) {
if (coEx == CheckoutException.Canceled) {
return;
}
throw coEx;
}
// Now notify the change service that the change was successful.
//
changeService.OnComponentChanged(this.Host, null, null, null);
}
}
}
catch (Exception t) {
Debug.Fail(t.ToString());
throw t;
}
*/
}
#endregion Protected Methods
#region Internal Properties
/// Retrieves the ActiveXHost object set in the constructor.
///
/// Critical - returns critical data.
///
internal ActiveXHost Host
{
[ SecurityCritical]
get { return _host; }
}
#endregion Internal Properties
#region Internal Methods
//
// Internal helper methods:
//
// Commented out until it is needed to comply with FXCOP
/////
///// Critical - returns critical data.
/////
//[SecurityCritical ]
//internal ActiveXHost GetAxHost()
//{
// return this.Host;
//}
///
/// Critical - instantiates ConnectionPointCoookie - a critical class.
///
[ SecurityCritical ]
internal void StartEvents()
{
if (_connectionPoint != null)
return;
//
Object nativeObject = this.Host.ActiveXInstance;
if (nativeObject != null)
{
try
{
_connectionPoint = new ConnectionPointCookie(nativeObject, this, typeof(UnsafeNativeMethods.IPropertyNotifySink));
}
catch (Exception ex)
{
if (CriticalExceptions.IsCriticalException(ex))
{
throw;
}
}
}
}
///
/// Critical - calls critical _connectionPoint property
/// NOT TAS - stopping listening to events - could turn off some mitigations.
///
[ SecurityCritical ]
internal void StopEvents()
{
if (_connectionPoint != null)
{
_connectionPoint.Disconnect();
_connectionPoint = null;
}
}
///
/// Critical - calls critical Host property
/// TreatAsSafe - changing the size of the control is considered safe.
///
[SecurityCritical, SecurityTreatAsSafe ]
internal int OnActiveXRectChange(NativeMethods.COMRECT lprcPosRect)
{
if (this.Host.ActiveXInPlaceObject != null)
{
this.Host.ActiveXInPlaceObject.SetObjectRects(
lprcPosRect,
lprcPosRect); //Same clip rect
this.Host.Bounds = lprcPosRect;
}
return NativeMethods.S_OK;
}
#endregion Internal Methods
#region Private Fields
///
/// Critical - contains critical data.
///
[SecurityCritical ]
private ActiveXHost _host;
///
/// Critical - contains critical data.
///
[SecurityCritical ]
private ConnectionPointCookie _connectionPoint;
#endregion Private Fields
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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