protected static bool HasUrl(DataObjectMeister data)
{
// Firefox places Urldata on the clipboard when copying HTML selections. As a result
// we need to ignore the urldata if there is html data and let the htmldata fall through
if (data.HTMLData != null)
return false;
return (data.URLData != null || IsTextUrl(GetText(data)));
}
protected static string ExtractUrl(DataObjectMeister data)
{
if (data.URLData != null)
return data.URLData.URL;
else if (IsTextUrl(GetText(data)))
return data.TextData.Text;
else
return null;
}
protected static string ExtractTitle(DataObjectMeister data)
{
if (data.URLData != null)
return data.URLData.Title;
else if (IsTextUrl(GetText(data)))
return data.TextData.Text; //note: don't use TextData.Title as it returns a truncated string (bug 328059)
else
return null;
}
private static string GetText(DataObjectMeister data)
{
string text = null;
if (data != null && data.TextData != null)
text = data.TextData.Text;
if (text == null)
text = string.Empty;
return text;
}
/// <summary>
/// Check whether we can create a handler from the passed context/meister
/// </summary>
/// <param name="dataMeister">data object meister</param>
/// <returns>true if can create from, otherwise false</returns>
public bool CanCreateFrom(DataObjectMeister dataMeister)
{
// cycle through our registered handlers and see if anyone can create from the data object
foreach (IDataFormatHandlerFactory handlerFactory in GetDataFormatHandlers())
{
try
{
// check if the handler can convert/handle the data
if (handlerFactory.CanCreateFrom(dataMeister))
return true;
}
catch (Exception e)
{
Debug.Fail(String.Format(CultureInfo.InvariantCulture, "Unexpected error querying data format handler factory {0}: {1}", handlerFactory.GetType().Name, e.Message));
}
}
// no-one could create from this data object, return false
return false;
}
/// <summary>
/// Is there URL data in the passed data object?
/// </summary>
/// <param name="data">data</param>
/// <returns>true if there is url data, else false</returns>
public static bool CanCreateFrom(DataObjectMeister data)
{
// see if there are files at the top-level of the file data
FileData fileData = data.FileData;
if (fileData != null && fileData.Files.Length > 0)
{
// if there are any directories in the file data then we can't create from
foreach (FileItem file in fileData.Files)
{
if (file.IsDirectory)
return false;
}
// no directories found, we can create
return true;
}
else // no file data
{
return false;
}
}
protected override void WndProc(ref Message m)
{
if (m.Msg == WM.PASTE)
{
try
{
IDataObject dataObject = Clipboard.GetDataObject();
if (dataObject != null)
{
DataObjectMeister meister = new DataObjectMeister(Clipboard.GetDataObject());
// if there is no text data then surpress paste
if (meister.TextData == null)
return;
// if the text-data can't be parsed into an integer then supress paste
try
{
int.Parse(meister.TextData.Text, CultureInfo.InvariantCulture);
}
catch
{
return;
}
}
}
catch (Exception ex)
{
Trace.Fail("Unexpected exception filtering WM_PASTE: " + ex.ToString());
return;
}
}
// default processing
base.WndProc(ref m);
}
public DataFormatHandler CreateFrom(DataObjectMeister dataMeister, DataFormatHandlerContext handlerContext)
{
return dataFormatRegistry.CreateFrom(dataMeister, handlerContext);
}
protected virtual bool CanCreateUrlFormatHandler(DataObjectMeister dataObject)
{
return editorContext.MarshalUrlSupported && UrlHandler.CanCreateFrom(dataObject);
}
/// <summary>
/// Is there text data in the passed data object?
/// </summary>
/// <param name="data">data</param>
/// <returns>true if there is text data, else false</returns>
public static bool CanCreateFrom(DataObjectMeister data)
{
return data.TextData != null;
}
public new static bool CanCreateFrom(DataObjectMeister data)
{
return IsPasteFromSharedCanvas(data) && (GetSourceTable(data) != null);
}
/// <summary>
/// Constructor for data format handlers.
/// </summary>
/// <param name="dataObject"></param>
protected DataFormatHandler(DataObjectMeister dataObject, DataFormatHandlerContext handlerContext)
{
this.dataMeister = dataObject;
this.handlerContext = handlerContext;
}
/// <summary>
/// Create a data format handler
/// </summary>
/// <param name="dataMeister">data to handle</param>
/// <returns>new data format handler (or null if none could be created)</returns>
public virtual DataFormatHandler CreateFrom(DataObjectMeister dataMeister, DataFormatHandlerContext handlerContext)
{
// cycle through our registered handlers and see who wants it
foreach (IDataFormatHandlerFactory handlerFactory in GetDataFormatHandlers())
{
// check if the handler can convert/handle the data
if (handlerFactory.CanCreateFrom(dataMeister))
{
// create a data format handler and return it
DataFormatHandler dataFormatHandler = handlerFactory.CreateFrom(dataMeister, handlerContext);
return dataFormatHandler;
}
}
// nobody wanted it!
return null;
}
public virtual bool CanCreateFrom(DataObjectMeister data)
{
return dataFormatRegistry.CanCreateFrom(data);
}
protected virtual bool CanCreateHtmlFormatHandler(DataObjectMeister dataObject)
{
return (editorContext.MarshalHtmlSupported || editorContext.MarshalTextSupported) && HtmlHandler.CanCreateFrom(dataObject);
}
public FileHandler(DataObjectMeister dataObject, DataFormatHandlerContext handlerContext, IHtmlMarshallingTarget editorContext)
: base(dataObject, handlerContext, editorContext)
{
}
protected virtual DataFormatHandler CreateImageOnlyHtmlDataFormatHandler(DataObjectMeister dataMeister, DataFormatHandlerContext handlerContext)
{
return new ImageOnlyHtmlHandler(dataMeister, handlerContext, editorContext);
}
public virtual bool CanDrop(IHTMLElement scope, DataObjectMeister meister)
{
return false;
}
private void PasteOverSelection(IHtmlEditorSelection selection)
{
if (!IsValidContentInsertionPoint(selection.SelectedMarkupRange))
return;
try
{
// get the current contents of the clipboard
DataObjectMeister clipboardMeister = new DataObjectMeister(Clipboard.GetDataObject());
// see if one of our data handlers wants to handle the paste
using (DataFormatHandler dataFormatHandler = DataFormatHandlerFactory.CreateFrom(clipboardMeister, DataFormatHandlerContext.ClipboardPaste))
{
if (dataFormatHandler != null)
{
using (new WaitCursor())
{
// get selection
MarkupRange selectionRange = selection.SelectedMarkupRange.Clone();
selectionRange.Start.Cling = false;
selectionRange.Start.Gravity = _POINTER_GRAVITY.POINTER_GRAVITY_Left;
selectionRange.End.Cling = false;
selectionRange.End.Gravity = _POINTER_GRAVITY.POINTER_GRAVITY_Right;
// do the paste
dataFormatHandler.InsertData(DataAction.Copy, selectionRange.Start, selectionRange.End);
MarkupRange newMarkUpRange = MarkupServices.CreateMarkupRange(selectionRange.End.Clone(), selectionRange.End.Clone());
MarkupPointerMoveHelper.DriveSelectionToLogicalPosition(newMarkUpRange, PostBodyElement, false);
// update selection
selectionRange.Start.MoveToPointer(newMarkUpRange.Start);
selectionRange.End.MoveToPointer(newMarkUpRange.Start);
selectionRange.ToTextRange().select();
}
}
}
}
catch (Exception ex)
{
//avoid throwing up error dialogs if paste fails.
Trace.Fail("failed to paste content: " + ex.Message, ex.StackTrace);
}
}
void IHtmlEditorCommandSource.PasteSpecial()
{
using (new WaitCursor())
{
DataObjectMeister dataObject = new DataObjectMeister(Clipboard.GetDataObject());
string html, baseUrl;
if (dataObject.HTMLData != null)
{
html = dataObject.HTMLData.HTMLSelection;
baseUrl = UrlHelper.GetBaseUrl(dataObject.HTMLData.SourceURL);
using (PasteSpecialForm pasteSpecialForm = new PasteSpecialForm())
{
if (pasteSpecialForm.ShowDialog(_mainFrameWindow) == DialogResult.OK)
{
PasteSpecialForm.PasteType formatting = pasteSpecialForm.ChosenFormatting;
switch (formatting)
{
//this is just the standard paste
case PasteSpecialForm.PasteType.Standard:
using (ApplicationPerformance.LogEvent("StandardHtmlPasteSpecial"))
{
//special case: paste from within writer--standard paste
//keeps formatting, and we want to thin
if (HtmlHandler.IsPasteFromSharedCanvas(dataObject))
{
html = HtmlCleaner.CleanupHtml(html, baseUrl, true, false);
break;
}
Paste();
}
return;
//just strip any scripts
case PasteSpecialForm.PasteType.KeepFormatting:
using (ApplicationPerformance.LogEvent("KeepFormattingHtmlPasteSpecial"))
{
PasteKeepFormatting();
return;
}
//remove all formatting except for line breaks
case PasteSpecialForm.PasteType.RemoveFormatting:
using (ApplicationPerformance.LogEvent("RemoveFormattingHtmlPasteSpecial"))
html = HtmlCleaner.CleanupHtml(html, baseUrl, true, true, false);
break;
}
html = UnsafeHtmlFragmentHelper.SterilizeHtml(html, UnsafeHtmlFragmentHelper.Flag.RemoveDocumentTags);
using (IUndoUnit undo = CreateUndoUnit())
{
InsertHtml(html, true);
undo.Commit();
}
}
}
}
else if (dataObject.TextData != null)
{
html = dataObject.TextData.Text;
using (PasteSpecialFormText pasteSpecialForm = new PasteSpecialFormText())
{
if (pasteSpecialForm.ShowDialog(_mainFrameWindow) == DialogResult.OK)
{
PasteSpecialFormText.PasteType formatting = pasteSpecialForm.ChosenFormatting;
switch (formatting)
{
//this is just the standard paste
case PasteSpecialFormText.PasteType.Standard:
using (ApplicationPerformance.LogEvent("StandardTextPasteSpecial"))
using (IUndoUnit undo = CreateUndoUnit())
{
string htmlFromText = TextHelper.GetHTMLFromText(html, true, this.DefaultBlockElement);
InsertHtml(htmlFromText, true);
undo.Commit();
}
break;
//insert as is
case PasteSpecialFormText.PasteType.KeepFormatting:
using (ApplicationPerformance.LogEvent("TextAsHtmlPasteSpecial"))
{
using (IUndoUnit undo = CreateUndoUnit())
{
html = HtmlCleaner.PreserveFormatting(html, String.Empty);
InsertHtml(html, true);
undo.Commit();
}
}
break;
}
}
}
}
else
{
//non html or text data on clipboard--file, etc.
DisplayMessage.Show(MessageId.PasteSpecialInvalidData, _mainFrameWindow);
}
}
}
protected virtual bool CanCreateImageOnlyHtmlFormatHandler(DataObjectMeister dataObject)
{
return editorContext.MarshalImagesSupported && ImageOnlyHtmlHandler.CanCreateFrom(dataObject);
}
private static IHTMLTable GetSourceTable(DataObjectMeister dataMeister)
{
// find our post body div
IHTMLElement body = GetPostBodyElement(dataMeister.HTMLData.HTMLDocument);
// look for a single table which constitutes the entire selection
if (body != null)
{
IHTMLElementCollection tables = (body as IHTMLElement2).getElementsByTagName("table");
if (tables.length >= 1)
{
IHTMLElement table = tables.item(0, 0) as IHTMLElement;
if (table.innerText == (body as IHTMLElement).innerText)
{
if (TableHelper.TableElementIsEditable(table))
{
return table as IHTMLTable;
}
}
}
}
// didn't find a single table
return null;
}
protected virtual bool CanCreateFileFormatHandler(DataObjectMeister dataObject)
{
return editorContext.MarshalFilesSupported && FileHandler.CanCreateFrom(dataObject);
}
public bool CanCreateFrom(DataObjectMeister data)
{
return _filter(data);
}
protected virtual bool CanCreateTextFormatHandler(DataObjectMeister dataObject)
{
return editorContext.MarshalTextSupported && PlainTextHandler.CanCreateFrom(dataObject);
}
public DataFormatHandler CreateFrom(DataObjectMeister dataMeister, DataFormatHandlerContext handlerContext)
{
DataFormatHandler dataFormatHandler;
dataFormatHandler = Activator.CreateInstance(_dataFormatHandlerType) as DataFormatHandler;
return dataFormatHandler;
}
protected virtual DataFormatHandler CreateTextDataFormatHandler(DataObjectMeister dataMeister, DataFormatHandlerContext handlerContext)
{
return new PlainTextHandler(dataMeister, handlerContext, editorContext);
}
public UrlHandler(DataObjectMeister dataObject, DataFormatHandlerContext handlerContext, IHtmlMarshallingTarget editorContext)
: base(dataObject, handlerContext, editorContext)
{
_url = ExtractUrl(dataObject);
_title = ExtractTitle(dataObject);
}
/// <summary>
/// Is there URL data in the passed data object?
/// </summary>
/// <param name="data">data</param>
/// <returns>true if there is url data, else false</returns>
public static bool CanCreateFrom(DataObjectMeister data)
{
return HasUrl(data);
}
protected FreeTextHandler(DataObjectMeister dataObject, DataFormatHandlerContext handlerContext, IHtmlMarshallingTarget editorContext)
: base(dataObject, handlerContext, editorContext)
{
caretPointer = editorContext.MarkupServices.CreateMarkupPointer();
}