public void RefreshFileCache()
{
//Heinous operation.
//Perform search on the files.
if (FileCache.Searching)
{
FileCache.CancelSearch();
System.Threading.Thread.Sleep(1500);
_btnSearch.Text = "Search";
}
else
{
ImageSizeFilter filter = new ImageSizeFilter();
filter.MinWidth = (int)_nudMinWidth.Value2;
filter.MaxWidth = (int)_nudMaxWidth.Value2;
filter.MinHeight = (int)_nudMinHeight.Value2;
filter.MaxHeight = (int)_nudMaxHeight.Value2;
FileCache.Search(_txtSearchPath.Text, filter, (value01) =>
{
//Progress Action
_pbSearchProgress.BeginInvoke(
(Action)(() =>
{
_pbSearchProgress.Value = (int)((double)_pbSearchProgress.Maximum * value01);
})
);
}, () =>
{
//Completion Action
UpdateFileCacheInfo();
MarkChanged();
_btnSearch.Text = "Search";
_pbSearchProgress.Value = _pbSearchProgress.Maximum;
});
_btnSearch.Text = "Cancel Search";
}
}
public void Search(string dir, ImageSizeFilter filter, Action <double> objProgressAction = null, Action objCompletionAction = null)
{
_objCompletionAction = objCompletionAction;
if (!System.IO.Directory.Exists(dir))
{
Globals.LogError("Path " + dir + " does not exist.");
//Invoke completion action on main thread, regardless of failure or success
Globals.MainForm.BeginInvoke((Action)(() =>
{
objCompletionAction();
}));
}
else
{
List <string> lstExtensions = Globals.MainForm.SettingsForm.GetFileTypes();
SearchTaskCancellationTokenSource = new CancellationTokenSource();
SearchTaskCancellationToken = SearchTaskCancellationTokenSource.Token;
SearchTask = new Task(((Action)(() =>
{
try
{
Globals.MainForm.SetSearchStatus("Gathering Files...");
//*Faster than gather files recursively
//*Also faster than Directory.GetFiles avoids memory issues
//https://stackoverflow.com/questions/163162/can-you-call-directory-getfiles-with-multiple-filters
IEnumerable <string> files = Directory.EnumerateFiles(
dir, "*.*",
SearchOption.AllDirectories
).ToArray();
Searched = 0;
Globals.MainForm.SetSearchStatus("Filtering Extensions...");
string eTest = System.IO.Path.GetExtension(files.ToList()[0]);
//Filter Extensions
List <string> filtered = files.Where(x =>
System.IO.Path.GetExtension(x).Length > 0 ?
lstExtensions.Contains(
System.IO.Path.GetExtension(x).ToLower()
) : false
).ToList();
//Filter width /height
Globals.MainForm.SetSearchStatus("Filtering Width/Height...");
FilterWidthHeight(filtered, filter, objProgressAction);
Globals.MainForm.SetSearchStatus("Filtering: Excluding " + ExcludedFiles.Count.ToString() + " Files...");
foreach (string s in ExcludedFiles)
{
filtered.RemoveAll(x => String.IsNullOrEmpty(x) || x.Equals(s));
}
lock (_objFileCacheLockObject)
{
Files = filtered;
}
Globals.MainForm.SetSearchStatus("Done.");
}
catch (Exception ex)
{
Globals.LogError(ex.ToString());
Globals.MainForm.SetSearchStatus("Error during search.");
}
//Invoke completion action on main thread, regardless of failure or success
Globals.MainForm.BeginInvoke((Action)(() =>
{
objCompletionAction();
}));
})), SearchTaskCancellationToken);
SearchTask.Start();
}
}
private void FilterWidthHeight(List <string> lstFiles, ImageSizeFilter minimax, Action <double> progress)
{
//Launch 1 thread per processor to filter images
TotalWHFiltered = 0;
//Filter the image width /height
List <string> filtered2 = new List <string>();
if (minimax != null)
{
int n = System.Environment.ProcessorCount;
int perProc = lstFiles.Count / n;
List <Task> tasks = new List <Task>();
List <CancellationTokenSource> sources = new List <CancellationTokenSource>();
List <int> starts = new List <int>();
int len = lstFiles.Count / n;
for (int iproc = 0; iproc < n; ++iproc)
{
starts.Add(lstFiles.Count / n * iproc);
}
TotalWHFiltered = 0;
//Send off child threads.
for (int iproc = 0; iproc < n; ++iproc)
{
//capture data for thread
CancellationTokenSource s = new CancellationTokenSource();
sources.Add(s);
CancellationTokenSource myToken = sources[iproc];
int temp = iproc;
Task tak = new Task(((Action)(() =>
{
int ifile;
for (ifile = starts[temp]; ifile < (starts[temp] + len); ++ifile)
{
TotalWHFiltered++;
if (TotalWHFiltered % 50 == 0)
{
Globals.MainForm.SetSearchStatus("Filtering W/H..." + TotalWHFiltered + "/" + lstFiles.Count);
progress?.Invoke((double)TotalWHFiltered / (double)lstFiles.Count);
}
if (myToken.IsCancellationRequested)
{
break;
}
if (ifile >= lstFiles.Count)
{
break;
}
string strPath = lstFiles[ifile];
try
{
if (File.Exists(strPath))
{
using (FileStream stream = new FileStream(strPath, FileMode.Open, FileAccess.Read))
{
//False 2nd 3rd parameter to avoid loading file into memer\
//http://stackoverflow.com/questions/552467/how-do-i-reliably-get-an-image-dimensions-in-net-without-loading-the-image
Image img = Image.FromStream(stream, false, false);
if (img.Width > minimax.MinWidth && img.Width < minimax.MaxWidth &&
img.Height > minimax.MinHeight && img.Height < minimax.MaxHeight)
{
filtered2.Add(strPath);
}
}
}
}
catch (Exception ex)
{
//Swallow
}
}
})), myToken.Token);
tak.Start();
tasks.Add(tak);
}
//Block this thread until all baby threads are done reading files
while (true)
{
//See if we are killed by the user.
if (this.SearchTaskCancellationToken.IsCancellationRequested)
{
//Cancel all tasks
foreach (CancellationTokenSource s in sources)
{
s.Cancel();
}
Thread.Sleep(500);
break;
}
//Check to see if all takss have completed.
int tasks_running = tasks.Count;
foreach (Task t in tasks)
{
if (t.IsCanceled == true || t.IsCompleted == true)
{
tasks_running--;
}
}
if (tasks_running == 0)
{
break;
}
Thread.Sleep(50);
}
}
lstFiles.Clear();
lstFiles.AddRange(filtered2);
}