public void HighlightAttributes()
{
// NOTE (steveb): test unamibiguous addition, deletion, and replacement
XDoc a = XDocFactory.From("<p>the <span class=\"red\">brown</span> fox</p>", MimeType.XML);
XDoc b = XDocFactory.From("<p>the <span class=\"blue\">brown</span> fox</p>", MimeType.XML);
var diff = XDocDiff.Diff(a, b, 10000);
List <Tuple <string, string, string> > invisible;
XDoc doc;
XDoc before;
XDoc after;
XDocDiff.Highlight(diff, out doc, out invisible, out before, out after);
Assert.AreEqual("<p>the <span class=\"blue\">brown</span> fox</p>", doc.ToString());
Assert.AreEqual(1, invisible.Count);
Assert.AreEqual(invisible[0].Item1, "/p/span/@class");
Assert.AreEqual(invisible[0].Item2, "red");
Assert.AreEqual(invisible[0].Item3, "blue");
Assert.AreEqual(a.ToString(), before.ToString());
Assert.AreEqual(b.ToString(), after.ToString());
}
internal static XDoc GetPageDiff(XDoc before, XDoc after, bool compact, int maxDelta, out XDoc invisibleDiff, out DekiResource summary, out XDoc beforeHighlightedChanges, out XDoc afterHighlightedChanges)
{
var resources = DekiContext.Current.Resources;
XDoc result = XDoc.Empty;
beforeHighlightedChanges = before;
afterHighlightedChanges = after;
invisibleDiff = XDoc.Empty;
// compute diff between the two documents
Tuplet <ArrayDiffKind, XDocDiff.Token>[] diff = XDocDiff.Diff(before, after, maxDelta);
if (diff == null)
{
summary = DekiResources.PAGE_DIFF_TOO_LARGE();
return(result);
}
// create change summary
int added;
int removed;
int attributes;
int structural;
summary = GetChangeSummary(diff, out added, out removed, out attributes, out structural);
// create document with highlighted changes
if ((added > 0) || (removed > 0) || (attributes > 0))
{
try {
List <Tuplet <string, string, string> > invisibleChanges;
XDocDiff.Highlight(diff, out result, out invisibleChanges, out beforeHighlightedChanges, out afterHighlightedChanges);
// check if we should only keep top-level elements that contain changes to cut down on the noise
if (compact)
{
if ((added > 0) || (removed > 0))
{
CompactDiff(result);
CompactDiff(beforeHighlightedChanges);
CompactDiff(afterHighlightedChanges);
}
else
{
// no changes were made, remove all nodes
result = XDoc.Empty;
}
}
// add invisible changes
if (invisibleChanges.Count > 0)
{
invisibleDiff = new XDoc("ol");
foreach (Tuplet <string, string, string> change in invisibleChanges)
{
invisibleDiff.Start("li");
invisibleDiff.Value(string.Format("{0}: ", change.Item1));
if (change.Item2 != null)
{
invisibleDiff.Elem("del", change.Item2.QuoteString());
}
else
{
invisibleDiff.Value(resources.Localize(DekiResources.PAGE_DIFF_NOTHING()));
}
invisibleDiff.Value(" " + DOUBLE_ARROW + " ");
if (change.Item3 != null)
{
invisibleDiff.Elem("ins", change.Item3.QuoteString());
}
else
{
invisibleDiff.Value(resources.Localize(DekiResources.PAGE_DIFF_NOTHING()));
}
invisibleDiff.End();
}
}
} catch (Exception e) {
summary = DekiResources.PAGE_DIFF_ERROR("MindTouch", e);
}
}
return(result);
}