/// <summary>
/// Generates the diff from the current selection.
/// </summary>
/// <param name="context"></param>
/// <param name="selection"></param>
/// <param name="revisions"></param>
/// <param name="visibleFilter"></param>
/// <returns>The diff as a string.</returns>
protected virtual string GetDiff(IAnkhServiceProvider context, ISelectionContext selection, SvnRevisionRange revisions, Predicate<SvnItem> visibleFilter)
{
if (selection == null)
throw new ArgumentNullException("selection");
if (context == null)
throw new ArgumentNullException("context");
IUIShell uiShell = context.GetService<IUIShell>();
bool foundModified = false;
foreach (SvnItem item in selection.GetSelectedSvnItems(true))
{
if (item.IsModified || item.IsDocumentDirty)
{
foundModified = true;
break; // no need (yet) to keep searching
}
}
PathSelectorInfo info = new PathSelectorInfo("Select items for diffing", selection.GetSelectedSvnItems(true));
info.VisibleFilter += visibleFilter;
if (foundModified)
info.CheckedFilter += delegate(SvnItem item) { return item.IsFile && (item.IsModified || item.IsDocumentDirty); };
info.RevisionStart = revisions == null ? SvnRevision.Base : revisions.StartRevision;
info.RevisionEnd = revisions == null ? SvnRevision.Working : revisions.EndRevision;
PathSelectorResult result;
// should we show the path selector?
if (!Shift && (revisions == null || !foundModified))
{
result = uiShell.ShowPathSelector(info);
if (!result.Succeeded)
return null;
}
else
result = info.DefaultResult;
if (!result.Succeeded)
return null;
SaveAllDirtyDocuments(selection, context);
return DoExternalDiff(context, result);
}