IEnumerable <FarFile> DoInvokeDeep(ProgressBox progress, Explorer explorer, int depth)
{
// stop?
if (Stopping || progress != null && UIUserStop())
{
yield break;
}
++ProcessedDirectoryCount;
// progress
if (progress != null && progress.ElapsedFromShow.TotalMilliseconds > 500)
{
var directoryPerSecond = ProcessedDirectoryCount / progress.ElapsedFromStart.TotalSeconds;
progress.Activity = string.Format(null, Res.SearchActivityDeep,
FoundFileCount, ProcessedDirectoryCount, directoryPerSecond);
progress.ShowProgress();
}
var args = new GetFilesEventArgs(ExplorerModes.Find);
foreach (var file in explorer.GetFiles(args))
{
// stop?
if (Stopping)
{
break;
}
// process and add
bool add = Directory || !file.IsDirectory;
if (add && Filter != null)
{
add = Filter(explorer, file);
}
if (add)
{
++FoundFileCount;
yield return(new SuperFile(explorer, file));
}
// skip if deep or leaf
if (Depth > 0 && depth >= Depth || !file.IsDirectory)
{
continue;
}
Explorer explorer2 = SuperExplorer.ExploreSuperDirectory(explorer, ExplorerModes.Find, file);
if (explorer2 == null)
{
continue;
}
foreach (var file2 in DoInvokeDeep(progress, explorer2, depth + 1))
{
yield return(file2);
}
}
}
IEnumerable <FarFile> InvokeWithProgress()
{
using (var progress = new ProgressBox(Res.Searching))
{
progress.LineCount = 2;
return(DoInvoke(progress));
}
}
//! It returns immediately and then only iterates, do not try/catch in here.
IEnumerable <FarFile> DoInvoke(ProgressBox progress)
{
FoundFileCount = 0;
ProcessedDirectoryCount = 0;
if (!string.IsNullOrEmpty(XFile) || !string.IsNullOrEmpty(XPath))
{
return(DoInvokeXPath(progress));
}
else if (Depth == 0)
{
return(DoInvokeWide(progress));
}
else
{
return(DoInvokeDeep(progress, _RootExplorer, 0));
}
}
IEnumerable <FarFile> DoInvokeXPath(ProgressBox progress)
{
// object context
var objectContext = new XPathObjectContext()
{
Filter = this.Filter,
IncrementDirectoryCount = delegate(int count)
{
ProcessedDirectoryCount += count;
if (progress == null)
{
return;
}
var directoryPerSecond = ProcessedDirectoryCount / progress.ElapsedFromStart.TotalSeconds;
progress.Activity = string.Format(null, Res.SearchActivityDeep,
FoundFileCount, ProcessedDirectoryCount, directoryPerSecond);
progress.ShowProgress();
},
Stopping = delegate
{
return(Stopping || progress != null && UIUserStop());
}
};
var xsltContext = new XPathXsltContext(objectContext.NameTable);
if (_XVariables != null)
{
foreach (var kv in _XVariables)
{
xsltContext.AddVariable(kv.Key, kv.Value);
}
}
// XPath text
string xpath;
if (string.IsNullOrEmpty(XFile))
{
xpath = XPath;
}
else
{
var input = XPathInput.ParseFile(XFile);
xpath = input.Expression;
foreach (var kv in input.Variables)
{
xsltContext.AddVariable(kv.Key, kv.Value);
}
}
var expression = XPathExpression.Compile(xpath);
if (expression.ReturnType != XPathResultType.NodeSet)
{
throw new InvalidOperationException("Invalid expression return type.");
}
expression.SetContext(xsltContext);
++ProcessedDirectoryCount;
var args = new GetFilesEventArgs(ExplorerModes.Find);
foreach (var file in _RootExplorer.GetFiles(args))
{
// stop?
if (Stopping || progress != null && UIUserStop()) //???? progress to navigator
{
break;
}
// filter out a leaf
if (Filter != null && !file.IsDirectory && !Filter(_RootExplorer, file))
{
continue;
}
var xfile = new SuperFile(_RootExplorer, file);
var navigator = new XPathObjectNavigator(xfile, objectContext);
var iterator = navigator.Select(expression);
while (iterator.MoveNext())
{
// stop?
if (Stopping || progress != null && UIUserStop()) //???? progress to navigator
{
break;
}
// found file or directory, ignore anything else
if (!(iterator.Current.UnderlyingObject is SuperFile currentFile))
{
continue;
}
// filter out directory, it is already done for files
if (Filter != null && currentFile.IsDirectory && (!Directory || !Filter(currentFile.Explorer, currentFile.File)))
{
continue;
}
// add
yield return(currentFile);
++FoundFileCount;
}
}
}
IEnumerable <FarFile> DoInvokeWide(ProgressBox progress)
{
var queue = new Queue <Explorer>();
queue.Enqueue(_RootExplorer);
while (queue.Count > 0 && !Stopping)
{
// cancel?
if (progress != null && UIUserStop())
{
break;
}
// current
var explorer = queue.Dequeue();
++ProcessedDirectoryCount;
// progress
if (progress != null && progress.ElapsedFromShow.TotalMilliseconds > 500)
{
var directoryPerSecond = ProcessedDirectoryCount / progress.ElapsedFromStart.TotalSeconds;
progress.Activity = string.Format(null, Res.SearchActivityWide,
FoundFileCount, ProcessedDirectoryCount, queue.Count, directoryPerSecond);
progress.ShowProgress();
}
var args = new GetFilesEventArgs(ExplorerModes.Find);
foreach (var file in explorer.GetFiles(args))
{
// stop?
if (Stopping)
{
break;
}
// process and add
bool add = Directory || !file.IsDirectory;
if (add && Filter != null)
{
add = Filter(explorer, file);
}
if (add)
{
++FoundFileCount;
yield return(new SuperFile(explorer, file));
}
// skip if flat or leaf
if (!Recurse || !file.IsDirectory)
{
continue;
}
Explorer explorer2 = SuperExplorer.ExploreSuperDirectory(explorer, ExplorerModes.Find, file);
if (explorer2 != null)
{
queue.Enqueue(explorer2);
}
}
}
}
