Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / WebBrowserSiteBase.cs / 1305376 / WebBrowserSiteBase.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- using System.Runtime.Serialization.Formatters.Binary; using System.Threading; using System.Configuration.Assemblies; using System.Runtime.Remoting; using System.Runtime.InteropServices; using System.Runtime.Serialization; using System.ComponentModel; using System.Diagnostics; using System; using System.Reflection; using System.Globalization; using System.Security.Permissions; using Microsoft.Win32; using System.Collections; using System.Collections.Specialized; using System.IO; using System.Drawing; using System.Windows.Forms.Design; using System.Windows.Forms.ComponentModel; using System.Windows.Forms.ComponentModel.Com2Interop; using System.ComponentModel.Design; using System.Windows.Forms; using System.Drawing.Imaging; using System.Drawing.Design; using System.Security; namespace System.Windows.Forms { ////// /// public class WebBrowserSiteBase : UnsafeNativeMethods.IOleControlSite, UnsafeNativeMethods.IOleClientSite, UnsafeNativeMethods.IOleInPlaceSite, UnsafeNativeMethods.ISimpleFrameSite, UnsafeNativeMethods.IPropertyNotifySink, IDisposable { private WebBrowserBase host; private AxHost.ConnectionPointCookie connectionPoint; // // The constructor takes an WebBrowserBase as a parameter, so unfortunately, // this cannot be used as a standalone site. It has to be used in conjunction // with WebBrowserBase. Perhaps we can change it in future. // internal WebBrowserSiteBase(WebBrowserBase h) { if (h == null) { throw new ArgumentNullException("h"); } this.host = h; } ////// This class implements the necessary interfaces required for an ActiveX site. /// /// This class is public, but has an internal constructor so that external /// users can only reference the Type (cannot instantiate it directly). /// Other classes have to inherit this class and expose it to the outside world. /// /// This class does not have any public property/method/event by itself. /// All implementations of the site interface methods are private, which /// means that inheritors who want to override even a single method of one /// of these interfaces will have to implement the whole interface. /// ////// /// public void Dispose() { Dispose(true); } ////// Dispose(release the cookie) /// ////// /// protected virtual void Dispose(bool disposing) { if (disposing) { StopEvents(); } } ////// Release the cookie if we're disposing /// ////// /// internal WebBrowserBase Host { get { return this.host; } } // // Interface implementations: // // // IOleControlSite methods: // ////// Retrieves the WebBrowserBase object set in the constructor. /// ////// 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._POINTL pPtlHimetric, NativeMethods.tagPOINTF pPtfContainer, int dwFlags) { if ((dwFlags & NativeMethods.ActiveX.XFORMCOORDS_HIMETRICTOCONTAINER) != 0) { if ((dwFlags & NativeMethods.ActiveX.XFORMCOORDS_SIZE) != 0) { pPtfContainer.x = (float) WebBrowserHelper.HM2Pix(pPtlHimetric.x, WebBrowserHelper.LogPixelsX); pPtfContainer.y = (float) WebBrowserHelper.HM2Pix(pPtlHimetric.y, WebBrowserHelper.LogPixelsY); } else if ((dwFlags & NativeMethods.ActiveX.XFORMCOORDS_POSITION) != 0) { pPtfContainer.x = (float) WebBrowserHelper.HM2Pix(pPtlHimetric.x, WebBrowserHelper.LogPixelsX); pPtfContainer.y = (float) WebBrowserHelper.HM2Pix(pPtlHimetric.y, WebBrowserHelper.LogPixelsY); } else { return NativeMethods.E_INVALIDARG; } } else if ((dwFlags & NativeMethods.ActiveX.XFORMCOORDS_CONTAINERTOHIMETRIC) != 0) { if ((dwFlags & NativeMethods.ActiveX.XFORMCOORDS_SIZE) != 0) { pPtlHimetric.x = WebBrowserHelper.Pix2HM((int)pPtfContainer.x, WebBrowserHelper.LogPixelsX); pPtlHimetric.y = WebBrowserHelper.Pix2HM((int)pPtfContainer.y, WebBrowserHelper.LogPixelsY); } else if ((dwFlags & NativeMethods.ActiveX.XFORMCOORDS_POSITION) != 0) { pPtlHimetric.x = WebBrowserHelper.Pix2HM((int)pPtfContainer.x, WebBrowserHelper.LogPixelsX); pPtlHimetric.y = WebBrowserHelper.Pix2HM((int)pPtfContainer.y, WebBrowserHelper.LogPixelsY); } else { return NativeMethods.E_INVALIDARG; } } else { return NativeMethods.E_INVALIDARG; } return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleControlSite.TranslateAccelerator(ref NativeMethods.MSG pMsg, int grfModifiers) { Debug.Assert(!this.Host.GetAXHostState(WebBrowserHelper.siteProcessedInputKey), "Re-entering UnsafeNativeMethods.IOleControlSite.TranslateAccelerator!!!"); this.Host.SetAXHostState(WebBrowserHelper.siteProcessedInputKey, true); Message msg = new Message(); msg.Msg = pMsg.message; msg.WParam = pMsg.wParam; msg.LParam = pMsg.lParam; msg.HWnd = pMsg.hwnd; try { bool f = ((Control)this.Host).PreProcessControlMessage(ref msg) == PreProcessControlState.MessageProcessed; return f ? NativeMethods.S_OK : NativeMethods.S_FALSE; } finally { this.Host.SetAXHostState(WebBrowserHelper.siteProcessedInputKey, false); } } /// /// int UnsafeNativeMethods.IOleControlSite.OnFocus(int fGotFocus) { return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleControlSite.ShowPropertyFrame() { return NativeMethods.E_NOTIMPL; } // // IOleClientSite methods: // /// /// int UnsafeNativeMethods.IOleClientSite.SaveObject() { return NativeMethods.E_NOTIMPL; } /// /// int UnsafeNativeMethods.IOleClientSite.GetMoniker(int dwAssign, int dwWhichMoniker, out Object moniker) { moniker = null; return NativeMethods.E_NOTIMPL; } /// /// int UnsafeNativeMethods.IOleClientSite.GetContainer(out UnsafeNativeMethods.IOleContainer container) { container = this.Host.GetParentContainer(); return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleClientSite.ShowObject() { if (this.Host.ActiveXState >= WebBrowserHelper.AXState.InPlaceActive) { IntPtr hwnd; if (NativeMethods.Succeeded(this.Host.AXInPlaceObject.GetWindow(out hwnd))) { if (this.Host.GetHandleNoCreate() != hwnd) { if (hwnd != IntPtr.Zero) { this.Host.AttachWindow(hwnd); this.OnActiveXRectChange(new NativeMethods.COMRECT(this.Host.Bounds)); } } } else if (this.Host.AXInPlaceObject is UnsafeNativeMethods.IOleInPlaceObjectWindowless) { throw new InvalidOperationException(SR.GetString(SR.AXWindowlessControl)); } } return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleClientSite.OnShowWindow(int fShow) { return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleClientSite.RequestNewObjectLayout() { return NativeMethods.E_NOTIMPL; } // // IOleInPlaceSite methods: // /// /// IntPtr UnsafeNativeMethods.IOleInPlaceSite.GetWindow() { try { return UnsafeNativeMethods.GetParent(new HandleRef(Host, Host.Handle)); } catch (Exception t) { Debug.Fail(t.ToString()); throw; } } /// /// int UnsafeNativeMethods.IOleInPlaceSite.ContextSensitiveHelp(int fEnterMode) { return NativeMethods.E_NOTIMPL; } /// /// int UnsafeNativeMethods.IOleInPlaceSite.CanInPlaceActivate() { return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleInPlaceSite.OnInPlaceActivate() { this.Host.ActiveXState = WebBrowserHelper.AXState.InPlaceActive; this.OnActiveXRectChange(new NativeMethods.COMRECT(this.Host.Bounds)); return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleInPlaceSite.OnUIActivate() { this.Host.ActiveXState = WebBrowserHelper.AXState.UIActive; this.Host.GetParentContainer().OnUIActivate(this.Host); return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleInPlaceSite.GetWindowContext(out UnsafeNativeMethods.IOleInPlaceFrame ppFrame, out UnsafeNativeMethods.IOleInPlaceUIWindow ppDoc, NativeMethods.COMRECT lprcPosRect, NativeMethods.COMRECT lprcClipRect, NativeMethods.tagOIFI lpFrameInfo) { ppDoc = null; ppFrame = this.Host.GetParentContainer(); lprcPosRect.left = this.Host.Bounds.X; lprcPosRect.top = this.Host.Bounds.Y; lprcPosRect.right = this.Host.Bounds.Width + this.Host.Bounds.X; lprcPosRect.bottom = this.Host.Bounds.Height + this.Host.Bounds.Y; lprcClipRect = WebBrowserHelper.GetClipRect(); if (lpFrameInfo != null) { lpFrameInfo.cb = Marshal.SizeOf(typeof(NativeMethods.tagOIFI)); lpFrameInfo.fMDIApp = false; lpFrameInfo.hAccel = IntPtr.Zero; lpFrameInfo.cAccelEntries = 0; lpFrameInfo.hwndFrame = (this.Host.ParentInternal == null) ? IntPtr.Zero : this.Host.ParentInternal.Handle; } return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleInPlaceSite.Scroll(NativeMethods.tagSIZE scrollExtant) { return NativeMethods.S_FALSE; } /// /// int UnsafeNativeMethods.IOleInPlaceSite.OnUIDeactivate(int fUndoable) { this.Host.GetParentContainer().OnUIDeactivate(this.Host); if (this.Host.ActiveXState > WebBrowserHelper.AXState.InPlaceActive) { this.Host.ActiveXState = WebBrowserHelper.AXState.InPlaceActive; } return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleInPlaceSite.OnInPlaceDeactivate() { if (this.Host.ActiveXState == WebBrowserHelper.AXState.UIActive) { ((UnsafeNativeMethods.IOleInPlaceSite)this).OnUIDeactivate(0); } this.Host.GetParentContainer().OnInPlaceDeactivate(this.Host); this.Host.ActiveXState = WebBrowserHelper.AXState.Running; return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleInPlaceSite.DiscardUndoState() { return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.IOleInPlaceSite.DeactivateAndUndo() { return this.Host.AXInPlaceObject.UIDeactivate(); } /// /// int UnsafeNativeMethods.IOleInPlaceSite.OnPosRectChange(NativeMethods.COMRECT lprcPosRect) { return this.OnActiveXRectChange(lprcPosRect); } // // ISimpleFrameSite methods: // /// /// int UnsafeNativeMethods.ISimpleFrameSite.PreMessageFilter(IntPtr hwnd, int msg, IntPtr wp, IntPtr lp, ref IntPtr plResult, ref int pdwCookie) { return NativeMethods.S_OK; } /// /// int UnsafeNativeMethods.ISimpleFrameSite.PostMessageFilter(IntPtr hwnd, int msg, IntPtr wp, IntPtr lp, ref IntPtr plResult, int dwCookie) { return NativeMethods.S_FALSE; } // // IPropertyNotifySink methods: // /// /// 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. // if (this.Host.NoComponentChangeEvents != 0) return; this.Host.NoComponentChangeEvents++; try { OnPropertyChanged(dispid); } catch (Exception t) { Debug.Fail(t.ToString()); throw; } finally { this.Host.NoComponentChangeEvents--; } } /// /// int UnsafeNativeMethods.IPropertyNotifySink.OnRequestEdit(int dispid) { return NativeMethods.S_OK; } // // Virtual overrides: // 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; } } // // Internal helper methods: // internal WebBrowserBase GetAXHost() { return this.Host; } internal void StartEvents() { if (connectionPoint != null) return; Object nativeObject = this.Host.activeXInstance; if (nativeObject != null) { try { connectionPoint = new AxHost.ConnectionPointCookie(nativeObject, this, typeof(UnsafeNativeMethods.IPropertyNotifySink)); } catch (Exception ex) { if (ClientUtils.IsCriticalException(ex)) { throw; } } } } internal void StopEvents() { if (connectionPoint != null) { connectionPoint.Disconnect(); connectionPoint = null; } } private int OnActiveXRectChange(NativeMethods.COMRECT lprcPosRect) { this.Host.AXInPlaceObject.SetObjectRects( NativeMethods.COMRECT.FromXYWH(0, 0, lprcPosRect.right - lprcPosRect.left, lprcPosRect.bottom - lprcPosRect.top), WebBrowserHelper.GetClipRect()); this.Host.MakeDirty(); return NativeMethods.S_OK; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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