/// <summary>
/// Takes the source HTML and makes necessary modifications to keep the source formatting as if it were to be
/// pasted into the destination range.
/// </summary>
/// <param name="sourceRange">The range containing the HTML that is being copied.</param>
/// <param name="destinationRange">The range that the source HTML will be copied to.</param>
/// <returns>A serialized string of the source HTML with necessary modifications to keep the source formatting
/// or null if unsuccessful.</returns>
private string KeepSourceFormatting(MarkupRange sourceRange, MarkupRange destinationRange)
{
Debug.Assert(sourceRange.Start.Container.GetOwningDoc() == destinationRange.Start.Container.GetOwningDoc(),
"Ranges must share an owning document!");
// We will temporarily add comments to the destination document to mark the destinationRange.
IHTMLElement startComment = null;
IHTMLElement endComment = null;
try
{
// This is our true destination document.
IHTMLDocument2 destinationDocument = destinationRange.Start.Container.Document;
MshtmlMarkupServices destinationMarkupServices = new MshtmlMarkupServices((IMarkupServicesRaw)destinationDocument);
// However, we'll use a temp destination because we don't want to paste anything into the real
// document yet as it could fail, it would fire events, images would start loading, etc.
MarkupContainer temporaryDestinationContainer = destinationMarkupServices.CreateMarkupContainer();
MarkupPointer temporaryDestinationPointer = destinationMarkupServices.CreateMarkupPointer();
temporaryDestinationPointer.MoveToContainer(temporaryDestinationContainer, true);
// We add in comments to the destination document so that when we copy this range over to the fake
// destination we'll be able to find the range again.
destinationRange.Start.Gravity = _POINTER_GRAVITY.POINTER_GRAVITY_Left;
destinationRange.End.Gravity = _POINTER_GRAVITY.POINTER_GRAVITY_Right;
string startMarker = string.Format(CultureInfo.InvariantCulture, "<!--{0}-->", Guid.NewGuid());
destinationMarkupServices.InsertHtml(startMarker, destinationRange.Start);
startComment = destinationRange.Start.Right(false).Element;
string endMarker = string.Format(CultureInfo.InvariantCulture, "<!--{0}-->", Guid.NewGuid());
destinationMarkupServices.InsertHtml(endMarker, destinationRange.End);
endComment = destinationRange.End.Left(false).Element;
try
{
// Copy over the entire destination document into the fake destination document.
MarkupRange destinationAll = SelectAll(destinationDocument);
destinationMarkupServices.Copy(destinationAll.Start, destinationAll.End, temporaryDestinationPointer);
// Find the original destination range in this copy.
MarkupRange temporaryDestinationRange = FindMarkedFragment(temporaryDestinationContainer.Document, startMarker, endMarker);
if (temporaryDestinationRange != null)
{
// Do the work to keep the source formatting.
MarkupRange inlinedRange = new KeepSourceFormatting(sourceRange, temporaryDestinationRange).Execute();
if (inlinedRange != null)
{
return inlinedRange.HtmlText;
}
}
}
finally
{
// WinLive 249077: Clear the temporary destination container, otherwise behaviors may
// inadvertently attach to elements in the MarkupContainer.
temporaryDestinationContainer.Document.body.innerHTML = String.Empty;
}
}
catch (Exception e)
{
// I really dont want some funky html on the clipboard that causes a problem with this code
// to prevent a paste from going through.
Trace.Fail("Failed to get inline css for selection: " + e);
}
finally
{
Debug.Assert(startComment is IHTMLCommentElement, "Didn't find start comment or it wasn't created.");
if (startComment is IHTMLCommentElement)
{
HTMLElementHelper.RemoveElement(startComment);
}
Debug.Assert(endComment is IHTMLCommentElement, "Didn't find end comment or it wasn't created.");
if (endComment is IHTMLCommentElement)
{
HTMLElementHelper.RemoveElement(endComment);
}
}
return null;
}
/// <summary>
/// Takes the source HTML and makes necessary modifications to keep the source formatting as if it were to be
/// pasted into the destination range.
/// </summary>
/// <param name="sourceRange">The range containing the HTML that is being copied.</param>
/// <param name="destinationRange">The range that the source HTML will be copied to.</param>
/// <returns>A serialized string of the source HTML with necessary modifications to keep the source formatting
/// or null if unsuccessful.</returns>
private string KeepSourceFormatting(MarkupRange sourceRange, MarkupRange destinationRange)
{
Debug.Assert(sourceRange.Start.Container.GetOwningDoc() == destinationRange.Start.Container.GetOwningDoc(),
"Ranges must share an owning document!");
// We will temporarily add comments to the destination document to mark the destinationRange.
IHTMLElement startComment = null;
IHTMLElement endComment = null;
try
{
// This is our true destination document.
IHTMLDocument2 destinationDocument = destinationRange.Start.Container.Document;
MshtmlMarkupServices destinationMarkupServices = new MshtmlMarkupServices((IMarkupServicesRaw)destinationDocument);
// However, we'll use a temp destination because we don't want to paste anything into the real
// document yet as it could fail, it would fire events, images would start loading, etc.
MarkupContainer temporaryDestinationContainer = destinationMarkupServices.CreateMarkupContainer();
MarkupPointer temporaryDestinationPointer = destinationMarkupServices.CreateMarkupPointer();
temporaryDestinationPointer.MoveToContainer(temporaryDestinationContainer, true);
// We add in comments to the destination document so that when we copy this range over to the fake
// destination we'll be able to find the range again.
destinationRange.Start.Gravity = _POINTER_GRAVITY.POINTER_GRAVITY_Left;
destinationRange.End.Gravity = _POINTER_GRAVITY.POINTER_GRAVITY_Right;
string startMarker = string.Format(CultureInfo.InvariantCulture, "<!--{0}-->", Guid.NewGuid());
destinationMarkupServices.InsertHtml(startMarker, destinationRange.Start);
startComment = destinationRange.Start.Right(false).Element;
string endMarker = string.Format(CultureInfo.InvariantCulture, "<!--{0}-->", Guid.NewGuid());
destinationMarkupServices.InsertHtml(endMarker, destinationRange.End);
endComment = destinationRange.End.Left(false).Element;
try
{
// Copy over the entire destination document into the fake destination document.
MarkupRange destinationAll = SelectAll(destinationDocument);
destinationMarkupServices.Copy(destinationAll.Start, destinationAll.End, temporaryDestinationPointer);
// Find the original destination range in this copy.
MarkupRange temporaryDestinationRange = FindMarkedFragment(temporaryDestinationContainer.Document, startMarker, endMarker);
if (temporaryDestinationRange != null)
{
// Do the work to keep the source formatting.
MarkupRange inlinedRange = new KeepSourceFormatting(sourceRange, temporaryDestinationRange).Execute();
if (inlinedRange != null)
{
return(inlinedRange.HtmlText);
}
}
}
finally
{
// WinLive 249077: Clear the temporary destination container, otherwise behaviors may
// inadvertently attach to elements in the MarkupContainer.
temporaryDestinationContainer.Document.body.innerHTML = String.Empty;
}
}
catch (Exception e)
{
// I really dont want some funky html on the clipboard that causes a problem with this code
// to prevent a paste from going through.
Trace.Fail("Failed to get inline css for selection: " + e);
}
finally
{
Debug.Assert(startComment is IHTMLCommentElement, "Didn't find start comment or it wasn't created.");
if (startComment is IHTMLCommentElement)
{
HTMLElementHelper.RemoveElement(startComment);
}
Debug.Assert(endComment is IHTMLCommentElement, "Didn't find end comment or it wasn't created.");
if (endComment is IHTMLCommentElement)
{
HTMLElementHelper.RemoveElement(endComment);
}
}
return(null);
}
