/// <summary>
/// Get the <see cref="HighlightedItem"/> for the current text, taking into account Find mode etc
/// </summary>
/// <param name="line">The line of text to pattern match</param>
/// <returns>A <see cref="HighlightedItem"/></returns>
private HighlightedItem GetHighlighting(string line)
{
HighlightedItem item = null;
item = this.GetHighlightedItem(line);
if (item == null)
{
throw new Exception("Item cannot be null!");
}
return(item);
}
private void UpdateFindHighlighting(string text)
{
this.Dispatcher.Invoke((Action)(() =>
{
foreach (int i in this.PreviouslySelectedItems)
{
this.colourfulListView.SelectedIndex = -1;
HighlightedItem item = new HighlightedItem(((HighlightedItem)this.colourfulListView.Items[i]).Text, ((HighlightedItem)this.colourfulListView.Items[i]).ForeColour, ((HighlightedItem)this.colourfulListView.Items[i]).BackColour);
item.Selected = false;
this.colourfulListView.Items[i] = item;
}
for (int i = LastSearchIndex; i < this.colourfulListView.Items.Count; i++)
{
HighlightedItem item = new HighlightedItem(((HighlightedItem)this.colourfulListView.Items[i]).Text, ((HighlightedItem)this.colourfulListView.Items[i]).ForeColour, ((HighlightedItem)this.colourfulListView.Items[i]).BackColour);
if (this.GetFoundHighlightItem(ref item))
{
{
this.colourfulListView.Items[i] = item;
this.colourfulListView.SelectedIndex = i;
this.colourfulListView.ScrollIntoView(item);
}
LastSearchIndex = i + 1;
this.previouslySelectedItems = new List <int>();
this.previouslySelectedItems.Add(i);
return;
}
else
{
//HACK: need to ensure that blank lines are not null!
if (item != null)
{
item.Selected = false;
this.colourfulListView.Items[i] = item;
this.colourfulListView.SelectedIndex = -1;
}
}
}
// We've not found anything, since the last find
LastSearchIndex = 0;
ThrowFindFinished();
}));
}
/// <summary>
/// Gets the <see cref="HighlightedItem"/> for the given text once it has either been searched for and found or pattern matched
/// </summary>
/// <param name="text">The line of text to find/pattern match</param>
private HighlightedItem GetHighlightedItem(string text)
{
HighlightedItem highlighted = new HighlightedItem();
highlighted.Text = text;
highlighted.ForeColour = Constants.DEFAULT_FORECOLOUR;
highlighted.BackColour = Constants.DEFAULT_BACKCOLOUR;
foreach (HighlightItem highlight in FindFirstHighlightByText(this.Patterns, text))
{
if (highlight.BorderColour != Constants.DEFAULT_NULL_COLOUR)
{
highlighted.ForeColour = Constants.DEFAULT_FORECOLOUR;
highlighted.BackColour = Constants.DEFAULT_BACKCOLOUR;
highlighted.BorderColour = highlight.BorderColour;
}
else
{
highlighted.ForeColour = highlight.ForeColour;
highlighted.BackColour = highlight.BackColour;
highlighted.BorderColour = Constants.DEFAULT_NULL_COLOUR;
}
// Only play a sound if we are told to by ReadLines() and the user
if (SettingsHelper.AppSettings[AppSettings.PLAY_SOUND] != null && PlaySound && bool.Parse(SettingsHelper.AppSettings[AppSettings.PLAY_SOUND]))
{
AudioHelper.Play(SettingsHelper.AppSettings[AppSettings.PLAY_SOUND_FILE]);
SoundPlayed = true;
}
if ((SettingsHelper.AppSettings[AppSettings.PAUSE_ON_FOUND] != null && bool.Parse(SettingsHelper.AppSettings[AppSettings.PAUSE_ON_FOUND])) || this.IsStopFollowTail)
{
IsFollowTail = false;
}
break; // use the first one we come across in the list - items at the top are most important
}
return(highlighted);
}
/// <summary>
/// Gets the highlight item of a found piece of text
/// </summary>
/// <param name="line">The line of text to match</param>
/// <returns></returns>
private bool GetFoundHighlightItem(ref HighlightedItem item)
{
HighlightItem special = new HighlightItem(this.SearchText, Constants.DEFAULT_FORECOLOUR, Constants.DEFAULT_BACKCOLOUR);
if (!string.IsNullOrEmpty(special.Pattern) && !string.IsNullOrEmpty(item.Text))
{
if (item.Text == special.Pattern || _patternMatching.MatchPattern(item.Text, special.Pattern))
{
item.Selected = true;
return(true);
}
else
{
item.Selected = false;
return(false);
}
}
return(false);
}
/// <summary>
/// Add items to the view collection when the file is updated
/// </summary>
private int AddHightLightedItem(string line, int location)
{
return((int)this.Dispatcher.Invoke((ReturnInt)(() =>
{
int index = location;
HighlightedItem item = GetHighlighting(line);
if (location >= this.colourfulListView.Items.Count || location == -1)
{
this.CollectionBackBuffer.Add(item);
return this.CollectionBackBuffer.Count - 1;
}
else
{
this.CollectionBackBuffer.RemoveAt(index);
this.CollectionBackBuffer.Insert(index, item);
return index;
}
})));
}
private bool ReadLines(bool overrideFileReadyCheck)
{
lock (this)
{
if (overrideFileReadyCheck || this.IsFileReadyForReread())
{
//using (StreamReader streamReader = this.OpenFile())
using (StreamReader streamReader = new StreamReader(this.OpenFile()))
{
// If there is no stream, or it's empty reset the collection and return
if (streamReader == null || streamReader.BaseStream.Length == 0)
{
this.LastReadStream = new MemoryStream();
this.CollectionBackBuffer.Clear();
CopyBackBufferToFront();
return(false);
}
// We have a viable stream so we now must parse through it
StreamReader oldReader = new StreamReader(this.LastReadStream);
oldReader.BaseStream.Position = 0;
int location = 0;
int positionInList = 0;
bool skipSameContent = false;
int lastUsedIndex = 0;
this.SoundPlayed = false;
this.PlaySound = true;
while (streamReader.Peek() > -1)
{
string oldLine = oldReader.ReadLine();
string line = streamReader.ReadLine();
if (line != null)
{
// There is no previous stream to compare against so just add the content to the screen
if (oldReader.BaseStream.Length <= 0)
{
this.SoundPlayed = true;
skipSameContent = false;
positionInList = location;
}
else
{
// We have more lines in the new stream than the old so add it to the end of the collection
if (oldLine == null)
{
// This results in a blank line being added to the end of the line collection
positionInList = -1;
}
// the oldline is not null and is either different from the new line or empty so add it to the collection
// at the current location
else if ((oldLine != null) && (!line.Equals(oldLine) || oldLine == string.Empty))
{
positionInList = location;
}
// Otherwise the old and new lines are the same so do nothing to the screen content
else
{
this.PlaySound = false;
skipSameContent = true;
lastUsedIndex = location;
HighlightedItem item = GetHighlighting(line);
this.CollectionBackBuffer[location].BackColour = item.BackColour;
this.CollectionBackBuffer[location].ForeColour = item.ForeColour;
this.PlaySound = true;
}
}
// if the old and new lines are different
if (!skipSameContent)
{
line = line.TrimEnd(Constants.NULL_TERMINATOR).Replace(Constants.MAC_NEWLINE, Constants.CARRIAGE_RETURN).Replace(Constants.UNIX_NEWLINE, Constants.LINE_FEED); // in case of incorrectly selected line end;
lastUsedIndex = this.AddHightLightedItem(line, positionInList);
if (this.SoundPlayed)
{
this.PlaySound = false;
}
}
skipSameContent = false;
}
location++;
if (location % 1000 == 0)
{
ReportProgress((int)(location * 100 / streamReader.BaseStream.Length), string.Format(LanguageHelper.GetLocalisedText((Application.Current as IApplication), Constants.LINES_IN_FILE), location), false, System.Windows.Visibility.Visible);
}
}
// if the lastUsedIndex has not been set above then
// default it to the location
if (lastUsedIndex == 0)
{
lastUsedIndex = location;
}
// Remove any lines that have been deleted from the end of the file
int max = this.CollectionBackBuffer.Count - 1;
if (lastUsedIndex != max)
{
for (int j = max; j > lastUsedIndex; j--)
{
this.RemoveHightlightedItem(j);
}
}
// Create the previous stream to compare with next time from the current stream this time
streamReader.BaseStream.Position = 0;
this.LastReadStream = new MemoryStream();
streamReader.BaseStream.CopyTo(this.LastReadStream);
}
// Copy the collection of ListView items to the ListView control
// Doing it this way should result in quicker page refreshes as the screen will only be updated once
CopyBackBufferToFront();
return(true);
}
}
return(false);
}
private void UpdateFindHighlighting(string text)
{
this.Dispatcher.Invoke((Action)(() =>
{
foreach (int i in this.PreviouslySelectedItems)
{
this.colourfulListView.SelectedIndex = -1;
HighlightedItem item = new HighlightedItem(((HighlightedItem)this.colourfulListView.Items[i]).Text, ((HighlightedItem)this.colourfulListView.Items[i]).ForeColour, ((HighlightedItem)this.colourfulListView.Items[i]).BackColour);
item.Selected = false;
this.colourfulListView.Items[i] = item;
}
for (int i = LastSearchIndex; i < this.colourfulListView.Items.Count; i++)
{
HighlightedItem item = new HighlightedItem(((HighlightedItem)this.colourfulListView.Items[i]).Text, ((HighlightedItem)this.colourfulListView.Items[i]).ForeColour, ((HighlightedItem)this.colourfulListView.Items[i]).BackColour);
if (this.GetFoundHighlightItem(ref item))
{
{
this.colourfulListView.Items[i] = item;
this.colourfulListView.SelectedIndex = i;
this.colourfulListView.ScrollIntoView(item);
}
LastSearchIndex = i + 1;
this.previouslySelectedItems = new List<int>();
this.previouslySelectedItems.Add(i);
return;
}
else
{
//HACK: need to ensure that blank lines are not null!
if (item != null)
{
item.Selected = false;
this.colourfulListView.Items[i] = item;
this.colourfulListView.SelectedIndex = -1;
}
}
}
// We've not found anything, since the last find
LastSearchIndex = 0;
ThrowFindFinished();
}));
}
/// <summary>
/// Gets the <see cref="HighlightedItem"/> for the given text once it has either been searched for and found or pattern matched
/// </summary>
/// <param name="text">The line of text to find/pattern match</param>
private HighlightedItem GetHighlightedItem(string text)
{
HighlightedItem highlighted = new HighlightedItem();
highlighted.Text = text;
highlighted.ForeColour = Constants.DEFAULT_FORECOLOUR;
highlighted.BackColour = Constants.DEFAULT_BACKCOLOUR;
foreach (HighlightItem highlight in FindFirstHighlightByText(this.Patterns, text))
{
if (highlight.BorderColour != Constants.DEFAULT_NULL_COLOUR)
{
highlighted.ForeColour = Constants.DEFAULT_FORECOLOUR;
highlighted.BackColour = Constants.DEFAULT_BACKCOLOUR;
highlighted.BorderColour = highlight.BorderColour;
}
else
{
highlighted.ForeColour = highlight.ForeColour;
highlighted.BackColour = highlight.BackColour;
highlighted.BorderColour = Constants.DEFAULT_NULL_COLOUR;
}
// Only play a sound if we are told to by ReadLines() and the user
if (SettingsHelper.AppSettings[AppSettings.PLAY_SOUND] != null && PlaySound && bool.Parse(SettingsHelper.AppSettings[AppSettings.PLAY_SOUND]))
{
AudioHelper.Play(SettingsHelper.AppSettings[AppSettings.PLAY_SOUND_FILE]);
SoundPlayed = true;
}
if ((SettingsHelper.AppSettings[AppSettings.PAUSE_ON_FOUND] != null && bool.Parse(SettingsHelper.AppSettings[AppSettings.PAUSE_ON_FOUND])) || this.IsStopFollowTail)
{
IsFollowTail = false;
}
break; // use the first one we come across in the list - items at the top are most important
}
return highlighted;
}
/// <summary>
/// Gets the highlight item of a found piece of text
/// </summary>
/// <param name="line">The line of text to match</param>
/// <returns></returns>
private bool GetFoundHighlightItem(ref HighlightedItem item)
{
HighlightItem special = new HighlightItem(this.SearchText, Constants.DEFAULT_FORECOLOUR, Constants.DEFAULT_BACKCOLOUR);
if (!string.IsNullOrEmpty(special.Pattern) && !string.IsNullOrEmpty(item.Text))
{
if (item.Text == special.Pattern || _patternMatching.MatchPattern(item.Text, special.Pattern))
{
item.Selected = true;
return true;
}
else
{
item.Selected = false;
return false;
}
}
return false;
}
