private ReadOnlyCollection <ITagSpan <IntraTextAdornmentTag> > GetTagsCore(SnapshotSpan span)
{
var list = new List <ITagSpan <IntraTextAdornmentTag> >();
var offset = span.Start.Position;
var snapshot = span.Snapshot;
// vars used in loop
SnapshotSpan cbSpan;
CBAdornmentData cbAdornmentData;
CBETagControl tagElement;
int cbStartPosition;
int cbEndPosition;
int cbHeaderPosition;
string cbHeader;
IntraTextAdornmentTag cbTag;
SnapshotSpan cbSnapshotSpan;
TagSpan <IntraTextAdornmentTag> cbTagSpan;
bool isSingleLineComment = false;
bool isMultiLineComment = false;
#if DEBUG
// Stop time
if (watch == null)
{
watch = new System.Diagnostics.Stopwatch();
}
watch.Restart();
#endif
try
{
// Find all closing bracets
for (int i = 0; i < span.Length; i++)
{
var position = i + offset;
var chr = snapshot[position];
// Skip comments
switch (chr)
{
case '/':
if (position > 0)
{
if (snapshot[position - 1] == '/')
{
isSingleLineComment = true;
}
if (snapshot[position - 1] == '*')
{
if (!isMultiLineComment)
{
// Multiline comment was not started in this span
// Every tag until now was inside a comment
foreach (var tag in list)
{
RemoveFromCache((tag.Tag.Adornment as CBETagControl).AdornmentData);
}
list.Clear();
}
isMultiLineComment = false;
}
}
break;
case '*':
if (position > 0 && snapshot[position - 1] == '/')
{
isMultiLineComment = true;
}
break;
case (char)10:
isSingleLineComment = false;
break;
case (char)13:
isSingleLineComment = false;
break;
}
if (chr != '}' || isSingleLineComment || isMultiLineComment)
{
continue;
}
// getting start and end position of code block
cbEndPosition = position;
if (position >= 0 && snapshot[position - 1] == '{')
{
// empty code block {}
cbStartPosition = position - 1;
cbSpan = new SnapshotSpan(snapshot, cbStartPosition, cbEndPosition - cbStartPosition);
}
else
{
// create inner span to navigate to get code block start
cbSpan = _TextStructureNavigator.GetSpanOfEnclosing(new SnapshotSpan(snapshot, position - 1, 1));
cbStartPosition = cbSpan.Start;
}
// Don't display tag for code blocks on same line
if (!snapshot.GetText(cbSpan).Contains('\n'))
{
continue;
}
// getting the code blocks header
cbHeaderPosition = -1;
if (snapshot[cbStartPosition] == '{')
{
// cbSpan does not contain the header
cbHeader = GetCodeBlockHeader(cbSpan, out cbHeaderPosition);
}
else
{
// cbSpan does contain the header
cbHeader = GetCodeBlockHeader(cbSpan, out cbHeaderPosition, position);
}
// Trim header
if (cbHeader != null && cbHeader.Length > 0)
{
cbHeader = cbHeader.Trim()
.Replace(Environment.NewLine, "")
.Replace('\t', ' ');
// Strip unnecessary spaces
while (cbHeader.Contains(" "))
{
cbHeader = cbHeader.Replace(" ", " ");
}
}
// Skip tag if option "only when header not visible"
if (_VisibleSpan != null && !IsTagVisible(cbHeaderPosition, cbEndPosition, _VisibleSpan, snapshot))
{
continue;
}
var iconMoniker = Microsoft.VisualStudio.Imaging.KnownMonikers.QuestionMark;
if (CBETagPackage.CBEDisplayMode != (int)CBEOptionPage.DisplayModes.Text &&
!string.IsNullOrWhiteSpace(cbHeader) && !cbHeader.Contains("{"))
{
iconMoniker = IconMonikerSelector.SelectMoniker(cbHeader);
}
// use cache or create new tag
cbAdornmentData = _adornmentCache
.Where(o =>
o.StartPosition == cbStartPosition &&
o.EndPosition == cbEndPosition)
.FirstOrDefault();
if (cbAdornmentData?.Adornment != null)
{
tagElement = cbAdornmentData.Adornment as CBETagControl;
}
else
{
// create new adornment
tagElement = new CBETagControl()
{
Text = cbHeader,
IconMoniker = iconMoniker,
DisplayMode = CBETagPackage.CBEDisplayMode
};
tagElement.TagClicked += Adornment_TagClicked;
cbAdornmentData = new CBAdornmentData(cbStartPosition, cbEndPosition, cbHeaderPosition, tagElement);
tagElement.AdornmentData = cbAdornmentData;
_adornmentCache.Add(cbAdornmentData);
}
tagElement.LineHeight = _FontSize * CBETagPackage.CBETagScale;
// Add new tag to list
cbTag = new IntraTextAdornmentTag(tagElement, null);
cbSnapshotSpan = new SnapshotSpan(snapshot, position + 1, 0);
cbTagSpan = new TagSpan <IntraTextAdornmentTag>(cbSnapshotSpan, cbTag);
list.Add(cbTagSpan);
}
}
catch (NullReferenceException)
{
// May happen, when closing a text editor
}
#if DEBUG
watch.Stop();
if (watch.Elapsed.Milliseconds > 100)
{
System.Diagnostics.Debug.WriteLine("Time elapsed: " + watch.Elapsed +
" on Thread: " + System.Threading.Thread.CurrentThread.ManagedThreadId +
" in Span: " + span.Start.Position + ":" + span.End.Position + " length: " + span.Length);
}
#endif
return(new ReadOnlyCollection <ITagSpan <IntraTextAdornmentTag> >(list));
}
private ReadOnlyCollection <ITagSpan <IntraTextAdornmentTag> > GetTagsCore(SnapshotSpan span)
{
var list = new List <ITagSpan <IntraTextAdornmentTag> >();
var offset = span.Start.Position;
var snapshot = span.Snapshot;
// vars used in loop
var isSingleLineComment = false;
var isMultiLineComment = false;
// Find all closing bracets
for (int i = 0; i < span.Length; i++)
{
var position = i + offset;
// Skip comments
switch (snapshot[position])
{
case '/':
if (position > 0)
{
if (snapshot[position - 1] == '/')
{
isSingleLineComment = true;
}
if (snapshot[position - 1] == '*')
{
if (!isMultiLineComment)
{
// Multiline comment was not started in this span
// Every tag until now was inside a comment
foreach (var tag in list)
{
RemoveFromCache((tag.Tag.Adornment as CBETagControl).AdornmentData);
}
list.Clear();
}
isMultiLineComment = false;
}
}
break;
case '*':
if (position > 0 && snapshot[position - 1] == '/')
{
isMultiLineComment = true;
}
break;
case '\n':
case '\r':
isSingleLineComment = false;
break;
}
if (snapshot[position] != '}' || isSingleLineComment || isMultiLineComment)
{
continue;
}
SnapshotSpan cbSpan;
int cbStartPosition;
// getting start and end position of code block
var cbEndPosition = position;
if (position >= 0 && snapshot[position - 1] == '{')
{
// empty code block {}
cbStartPosition = position - 1;
cbSpan = new SnapshotSpan(snapshot, position - 1, 1);
}
else
{
// create inner span to navigate to get code block start
cbSpan = _TextStructureNavigator.GetSpanOfEnclosing(new SnapshotSpan(snapshot, position - 1, 1));
cbStartPosition = cbSpan.Start;
}
// Don't display tag for code blocks on same line
if (!snapshot.GetText(cbSpan).Contains('\n'))
{
continue;
}
// getting the code blocks header
var cbHeaderPosition = -1;
string cbHeader;
if (snapshot[cbStartPosition] == '{')
{
// cbSpan does not contain the header
cbHeader = GetCodeBlockHeader(cbSpan, out cbHeaderPosition);
}
else
{
// cbSpan does contain the header
cbHeader = GetCodeBlockHeader(cbSpan, out cbHeaderPosition, position);
}
// Trim header
if (cbHeader != null && cbHeader.Length > 0)
{
cbHeader = cbHeader.Trim()
.Replace(Environment.NewLine, "")
.Replace('\t', ' ');
// Strip unnecessary spaces
while (cbHeader.Contains(" "))
{
cbHeader = cbHeader.Replace(" ", " ");
}
}
// Skip tag if option "only when header not visible"
if (_VisibleSpan != null && !IsTagVisible(cbHeaderPosition, cbEndPosition, _VisibleSpan, snapshot))
{
continue;
}
var iconMoniker = Microsoft.VisualStudio.Imaging.KnownMonikers.QuestionMark;
if (CBETagPackage.CBEDisplayMode != (int)CBEOptionPage.DisplayModes.Text &&
!string.IsNullOrWhiteSpace(cbHeader) && !cbHeader.Contains("{"))
{
iconMoniker = IconMonikerSelector.SelectMoniker(cbHeader);
}
// use cache or create new tag
var cbAdornmentData = _adornmentCache
.Find(x =>
x.StartPosition == cbStartPosition &&
x.EndPosition == cbEndPosition);
CBETagControl tagElement;
if (cbAdornmentData?.Adornment != null)
{
tagElement = cbAdornmentData.Adornment as CBETagControl;
}
else
{
// create new adornment
tagElement = new CBETagControl()
{
Text = cbHeader,
IconMoniker = iconMoniker,
DisplayMode = CBETagPackage.CBEDisplayMode
};
tagElement.TagClicked += Adornment_TagClicked;
cbAdornmentData = new CBAdornmentData(cbStartPosition, cbEndPosition, cbHeaderPosition, tagElement);
tagElement.AdornmentData = cbAdornmentData;
_adornmentCache.Add(cbAdornmentData);
}
tagElement.LineHeight = _FontSize * CBETagPackage.CBETagScale;
// Add new tag to list
var cbTag = new IntraTextAdornmentTag(tagElement, null);
var cbSnapshotSpan = new SnapshotSpan(snapshot, position + 1, 0);
var cbTagSpan = new TagSpan <IntraTextAdornmentTag>(cbSnapshotSpan, cbTag);
list.Add(cbTagSpan);
}
return(new ReadOnlyCollection <ITagSpan <IntraTextAdornmentTag> >(list));
}