///////////////////////////////////////////////////////////////////////////
// Implementation
/// <include file='doc\MSHTMLHost.uex' path='docs/doc[@for="TridentSite.CreateDocument"]/*' />
/// <devdoc>
/// Creates a new instance of mshtml and initializes it as a new document
/// using its IPersistStreamInit.
/// </devdoc>
protected void CreateDocument()
{
try {
// Create an instance of Trident
tridentDocument = (NativeMethods.IHTMLDocument2) new NativeMethods.HTMLDocument();
tridentOleObject = (NativeMethods.IOleObject)tridentDocument;
// Initialize its client site
tridentOleObject.SetClientSite((NativeMethods.IOleClientSite) this);
// Initialize it
NativeMethods.IPersistStreamInit psi = (NativeMethods.IPersistStreamInit)tridentDocument;
psi.InitNew();
}
catch (Exception e) {
Debug.Fail(e.ToString());
throw e;
}
}
/// <summary>Called when the control has just become ready.</summary>
/// <param name="e"></param>
protected internal virtual void OnReadyStateComplete(EventArgs e)
{
this.isReady = true;
EventHandler handler = (EventHandler)this.Events[readyStateCompleteEvent];
if (handler != null)
{
handler(this, e);
}
if (this.focusDesired)
{
this.focusDesired = false;
this.site.ActivateHtml();
this.site.SetFocus();
}
// HtmlEditor
this.persistStream = (NativeMethods.IPersistStreamInit) this.HtmlDocument;
}
/// <include file='doc\MSHTMLHost.uex' path='docs/doc[@for="TridentSite.CreateDocument"]/*' />
/// <devdoc>
/// Creates a new instance of mshtml and initializes it as a new document
/// using its IPersistStreamInit.
/// </devdoc>
protected void CreateDocument()
{
Debug.WriteLineIf(StyleBuilder.StyleBuilderSwitch.TraceVerbose, "In TridentSite::CreateTrident");
try {
// Create an instance of Trident
tridentDocument = (Microsoft.VisualStudio.Interop.Trident.IHTMLDocument2) new HTMLDocument();
tridentOleObject = (NativeMethods.IOleObject)tridentDocument;
// Initialize its client site
Debug.WriteLineIf(StyleBuilder.StyleBuilderSwitch.TraceVerbose, "Setting Trident's IOleClientSite");
tridentOleObject.SetClientSite((NativeMethods.IOleClientSite) this);
// Initialize it
Debug.WriteLineIf(StyleBuilder.StyleBuilderSwitch.TraceVerbose, "Initializing Trident through IPersistStreamInit");
NativeMethods.IPersistStreamInit psi = (NativeMethods.IPersistStreamInit)tridentDocument;
psi.InitNew();
}
catch (Exception e) {
Debug.Fail(e.ToString());
throw e;
}
}
/// <summary>Called when the control has just become ready.</summary>
/// <param name="e"></param>
protected internal virtual void OnReadyStateComplete(EventArgs e)
{
this.isReady = true;
EventHandler handler = (EventHandler)this.Events[readyStateCompleteEvent];
if (handler != null)
{
handler(this, e);
}
if (this.focusDesired)
{
this.focusDesired = false;
this.site.ActivateHtml();
this.site.SetFocus();
}
// HtmlEditor
this.persistStream = (NativeMethods.IPersistStreamInit) this.HtmlDocument;
this.Selection.SynchronizeSelection();
// Set the mutiple selection mode to the last desired multiple selection mode
if (this.multipleSelectionDesired)
{
this.MultipleSelectionEnabled = this.multipleSelectionDesired;
}
// Set the absolute positioning mode to the last desired absolute position mode
if (this.absolutePositioningDesired)
{
this.AbsolutePositioningEnabled = this.absolutePositioningDesired;
}
}
/// <summary>Called when the control has just become ready.</summary>
/// <param name="e"></param>
protected internal virtual void OnReadyStateComplete(EventArgs e)
{
this.isReady = true;
EventHandler handler = (EventHandler)this.Events[readyStateCompleteEvent];
if (handler != null)
{
handler(this, e);
}
if (this.focusDesired)
{
this.focusDesired = false;
this.site.ActivateHtml();
this.site.SetFocus();
}
// HtmlEditor
this.persistStream = (NativeMethods.IPersistStreamInit)this.HtmlDocument;
this.Selection.SynchronizeSelection();
// Set the mutiple selection mode to the last desired multiple selection mode
if (this.multipleSelectionDesired)
{
this.MultipleSelectionEnabled = this.multipleSelectionDesired;
}
// Set the absolute positioning mode to the last desired absolute position mode
if (this.absolutePositioningDesired)
{
this.AbsolutePositioningEnabled = this.absolutePositioningDesired;
}
}
/// <summary>Saves the HTML contained in control to a string and return it.</summary>
/// <returns>string - The HTML in the control</returns>
public string SaveHtml()
{
if (!this.IsCreated)
{
throw new Exception("HtmlControl.SaveHtml : No HTML to save!");
}
string content = String.Empty;
try
{
NativeMethods.IHTMLDocument2 document = this.site.Document;
// First save the document to a stream
NativeMethods.IPersistStreamInit psi = (NativeMethods.IPersistStreamInit)document;
Debug.Assert(psi != null, "Expected IPersistStreamInit");
NativeMethods.IStream stream = null;
NativeMethods.CreateStreamOnHGlobal(NativeMethods.NullIntPtr, true, out stream);
psi.Save(stream, 1);
// Now copy the stream to the string
NativeMethods.STATSTG stat = new NativeMethods.STATSTG();
stream.Stat(stat, 1);
int length = (int)stat.cbSize;
byte[] bytes = new byte[length];
IntPtr hglobal;
NativeMethods.GetHGlobalFromStream(stream, out hglobal);
Debug.Assert(hglobal != NativeMethods.NullIntPtr, "Failed in GetHGlobalFromStream");
// First copy the stream to a byte array
IntPtr pointer = NativeMethods.GlobalLock(hglobal);
if (pointer != NativeMethods.NullIntPtr)
{
Marshal.Copy(pointer, bytes, 0, length);
NativeMethods.GlobalUnlock(hglobal);
// Then create the string from the byte array (use a StreamReader to eat the preamble in the UTF8 encoding case)
StreamReader streamReader = null;
try
{
streamReader = new StreamReader(new MemoryStream(bytes), Encoding.Default);
content = streamReader.ReadToEnd();
}
finally
{
if (streamReader != null)
{
streamReader.Close();
}
}
}
}
catch (Exception exception)
{
Debug.Fail("HtmlControl.SaveHtml" + exception.ToString());
content = String.Empty;
}
finally
{
}
if (content == null)
{
content = String.Empty;
}
return(content);
/*
* HtmlFormatter formatter = new HtmlFormatter();
* StringWriter writer = new StringWriter();
* formatter.Format(content, writer);
* return writer.ToString();
*/
}
/*
* public void LoadHtml(string content, string url)
* {
* this.LoadHtml(content, url, null);
* }
*/
// REVIEW: Add a load method for stream and url
/// <summary>
/// Loads HTML content from a string into this control identified by the specified URL.
/// If MSHTML has not yet been created, the loading is postponed until MSHTML has been created.
/// </summary>
/// <param name="content"></param>
/// <param name="url"></param>
public void LoadHtml(string content, string url)
{
if (content == null)
{
content = "";
}
if (!this.isCreated)
{
this.desiredContent = content;
this.desiredUrl = url;
this.desiredLoad = true;
return;
}
NativeMethods.IStream stream = null;
//First we create a COM stream
IntPtr hglobal = Marshal.StringToHGlobalUni(content);
NativeMethods.CreateStreamOnHGlobal(hglobal, true, out stream);
// Initialize a new document if there is nothing to load
if (stream == null)
{
NativeMethods.IPersistStreamInit psi = (NativeMethods.IPersistStreamInit) this.site.Document;
Debug.Assert(psi != null, "Expected IPersistStreamInit");
psi.InitNew();
psi = null;
}
else
{
NativeMethods.IHTMLDocument2 document = this.site.Document;
if (url == null)
{
// If there is no specified URL load the document from the stream.
NativeMethods.IPersistStreamInit psi = (NativeMethods.IPersistStreamInit)document;
Debug.Assert(psi != null, "Expected IPersistStreamInit");
psi.Load(stream);
psi = null;
}
else
{
// Otherwise we create a moniker and load the stream to that moniker.
NativeMethods.IPersistMoniker persistMoniker = (NativeMethods.IPersistMoniker)document;
NativeMethods.IMoniker moniker = null;
NativeMethods.CreateURLMoniker(null, url, out moniker);
NativeMethods.IBindCtx bindContext = null;
NativeMethods.CreateBindCtx(0, out bindContext);
persistMoniker.Load(1, moniker, bindContext, 0);
persistMoniker = null;
moniker = null;
bindContext = null;
}
}
this.url = url;
}
/*
* public void LoadHtml(string content, string url)
* {
* this.LoadHtml(content, url, null);
* }
*/
// REVIEW: Add a load method for stream and url
/// <summary>
/// Loads HTML content from a string into this control identified by the specified URL.
/// If MSHTML has not yet been created, the loading is postponed until MSHTML has been created.
/// </summary>
/// <param name="content"></param>
/// <param name="url"></param>
public void LoadHtml(string content, string url)
{
if (content == null)
{
content = "";
}
if (!this.isCreated)
{
this.desiredContent = content;
this.desiredUrl = url;
this.desiredLoad = true;
return;
}
NativeMethods.IStream stream = null;
// added by Erik Frey - UTF preamble
byte[] preamble = UnicodeEncoding.Unicode.GetPreamble();
string byteOrderMark = UnicodeEncoding.Unicode.GetString(preamble, 0, preamble.Length);
// i guess .NET 2.0 fixed up unicode string handling
if (System.Environment.Version.Major > 1 || !content.StartsWith(byteOrderMark))
{
content = byteOrderMark + content;
}
//First we create a COM stream
IntPtr hglobal = Marshal.StringToHGlobalUni(content);
NativeMethods.CreateStreamOnHGlobal(hglobal, true, out stream);
// Initialize a new document if there is nothing to load
if (stream == null)
{
NativeMethods.IPersistStreamInit psi = (NativeMethods.IPersistStreamInit) this.site.Document;
Debug.Assert(psi != null, "Expected IPersistStreamInit");
psi.InitNew();
psi = null;
}
else
{
NativeMethods.IHTMLDocument2 document = this.site.Document;
if (url == null)
{
// If there is no specified URL load the document from the stream.
NativeMethods.IPersistStreamInit psi = (NativeMethods.IPersistStreamInit)document;
Debug.Assert(psi != null, "Expected IPersistStreamInit");
psi.Load(stream);
psi = null;
}
else
{
// Otherwise we create a moniker and load the stream to that moniker.
NativeMethods.IPersistMoniker persistMoniker = (NativeMethods.IPersistMoniker)document;
NativeMethods.IMoniker moniker = null;
NativeMethods.CreateURLMoniker(null, url, out moniker);
NativeMethods.IBindCtx bindContext = null;
NativeMethods.CreateBindCtx(0, out bindContext);
persistMoniker.Load(1, moniker, bindContext, 0);
persistMoniker = null;
moniker = null;
bindContext = null;
}
}
this.url = url;
}
