protected override bool ReadContent()
{
var blockInfo = new CodeBlockInfo {
OuterStart = new TextRange(stream.Position, 0)
};
lineStart = stream.Position;
if (!TryReadSpaces(spaceCount))
{
return(false);
}
while (true)
{
var thisLineStart = lineStart;
var range = TryConsumeContentLine();
if (range == null)
{
break;
}
blockInfo.OuterEnd = new TextRange(range.End, 0);
// Get the character count of the indent, which may be different if tabs are involved.
var indentSize = range.Start - thisLineStart;
range.Expand(-indentSize, 0);
ReportArtifact(new CodeLineArtifact(blockInfo, range, indentSize, 0));
}
return(true);
}
static string Caption(CodeBlockInfo block)
{
if (string.IsNullOrEmpty(block.Language))
{
return("[ Code Block ]");
}
return("[ " + block.Language + " Code Block ]");
}
public IEnumerable <ITagSpan <IOutliningRegionTag> > GetTags(NormalizedSnapshotSpanCollection spans)
{
if (!spans.Any())
{
yield break;
}
var artifacts = artifactsGetter();
// Start from the first artifact after the start
// position. Since code blocks will always have
// an end-boundary artifact, this will work even
// if we start in the middle of a code block.
int i = artifacts.GetFirstItemAfterOrAtPosition(spans[0].Start);
if (i < 0)
{
yield break;
}
CodeBlockInfo lastBlock = null;
for (; i < artifacts.Count; i++)
{
var cba = artifacts[i] as ICodeBlockArtifact;
// Skip artifacts that aren't in code blocks, and
// those in code blocks we have already returned.
if (cba == null || cba.BlockInfo == lastBlock)
{
continue;
}
lastBlock = cba.BlockInfo;
// Skip single-line indented code blocks, but not single-line fenced code blocks
if (lastBlock.CodeLines.Count == 1 && lastBlock.OuterEnd.End == lastBlock.CodeLines[0].End)
{
continue;
}
yield return(new TagSpan <IOutliningRegionTag>(
new SnapshotSpan(spans[0].Snapshot, Span.FromBounds(lastBlock.OuterStart.Start, lastBlock.OuterEnd.End)),
tagCreator(
Caption(lastBlock),
lastBlock.CodeLines
.Select(a => a.InnerRange.ToSnapshotSpan(spans[0].Snapshot))
.ToList() // Force eager evaluation; this query is only enumerated when a tooltip is shown, so we need to grab the snapshot
)
));
if (lastBlock.OuterStart.Start > spans.Last().End)
{
break; // If we have completely passed the requested range, stop.
}
}
}
static string Caption(CodeBlockInfo block)
{
if (string.IsNullOrEmpty(block.Language))
{
return("[ code block ]");
}
return("[ " + block.Language.ToUpperInvariant() + " code block ]");
}
public CodeLineArtifact(CodeBlockInfo blockInfo, ITextRange range, int leftLength, int rightLength)
: base(ArtifactTreatAs.Code, range, leftLength, rightLength, MarkdownClassificationTypes.MarkdownCode, true)
{
if (blockInfo == null)
{
throw new ArgumentNullException("blockInfo");
}
BlockInfo = blockInfo;
}
public BlockBoundaryArtifact(CodeBlockInfo blockInfo, BoundaryType type)
: base(ArtifactTreatAs.Code, type == BoundaryType.Start ? blockInfo.OuterStart : blockInfo.OuterEnd, 0, 0, MarkdownClassificationTypes.MarkdownCode, true)
{
BlockInfo = blockInfo;
Boundary = type;
// Replace the BlockInfo's TextRanges with our created
// artifacts so that they will be adjusted as the user
// edits the text. TextRangeCollection shifts existing
// artifacts as the user types elsewhere.
if (type == BoundaryType.Start)
BlockInfo.OuterStart = this;
else
BlockInfo.OuterEnd = this;
}
protected override bool ReadContent()
{
SkipSpaces(3);
var sepStart = stream.Position;
if (TryConsume("```"))
{
fence = "```";
}
else if (TryConsume("~~~"))
{
fence = "~~~";
}
else
{
return(false);
}
blockInfo = new CodeBlockInfo {
OuterStart = TextRange.FromBounds(sepStart, stream.Position)
};
var langRange = TryConsumeContentLine();
if (langRange != null)
{
blockInfo.Language = stream.GetSubstringAt(langRange.Start, langRange.Length);
}
while (true)
{
var range = TryConsumeContentLine();
if (range == null)
{
break;
}
ReportArtifact(new CodeLineArtifact(blockInfo, range, 0, 0));
}
// If the stream ended without a closing fence, give an empty end.
if (blockInfo.OuterEnd == null)
{
blockInfo.OuterEnd = new TextRange(stream.Length, 0);
}
return(true);
}
public BlockBoundaryArtifact(CodeBlockInfo blockInfo, BoundaryType type)
: base(ArtifactTreatAs.Code, type == BoundaryType.Start ? blockInfo.OuterStart : blockInfo.OuterEnd, 0, 0, MarkdownClassificationTypes.MarkdownCode, true)
{
BlockInfo = blockInfo;
Boundary = type;
// Replace the BlockInfo's TextRanges with our created
// artifacts so that they will be adjusted as the user
// edits the text. TextRangeCollection shifts existing
// artifacts as the user types elsewhere.
if (type == BoundaryType.Start)
{
BlockInfo.OuterStart = this;
}
else
{
BlockInfo.OuterEnd = this;
}
}
public void GetArtifacts(ITextProvider text, ArtifactCollection artifactCollection)
{
var parser = new MarkdownParser(new TabAwareCharacterStream(text));
CodeBlockInfo lastBlock = null;
parser.ArtifactFound += (s, e) =>
{
var cla = e.Artifact as CodeLineArtifact;
if (cla != null)
{
if (lastBlock == null || lastBlock != cla.BlockInfo)
{
if (lastBlock != null)
{
artifactCollection.Add(new BlockBoundaryArtifact(lastBlock, BoundaryType.End));
}
lastBlock = cla.BlockInfo;
artifactCollection.Add(new BlockBoundaryArtifact(cla.BlockInfo, BoundaryType.Start));
}
// Don't add artifacts for HTML code lines.
//if ((cla.BlockInfo.Language ?? "").StartsWith("htm", StringComparison.OrdinalIgnoreCase))
//{
// cla.BlockInfo.IsExtradited = true;
// return;
//}
}
// If we got a non-block artifact after a block end, add the end marker.
else if (lastBlock != null && e.Artifact.Start >= lastBlock.OuterEnd.End)
{
artifactCollection.Add(new BlockBoundaryArtifact(lastBlock, BoundaryType.End));
lastBlock = null;
}
artifactCollection.Add(e.Artifact);
};
parser.Parse();
if (lastBlock != null)
{
artifactCollection.Add(new BlockBoundaryArtifact(lastBlock, BoundaryType.End));
}
}
public CodeLineArtifact(CodeBlockInfo blockInfo, ITextRange range, int leftLength, int rightLength)
: base(ArtifactTreatAs.Code, range, leftLength, rightLength, MarkdownClassificationTypes.MarkdownCode, true)
{
if (blockInfo == null) throw new ArgumentNullException("blockInfo");
BlockInfo = blockInfo;
}
protected override bool ReadContent()
{
SkipSpaces(3);
var sepStart = stream.Position;
if (TryConsume("```"))
fence = "```";
else if (TryConsume("~~~"))
fence = "~~~";
else
return false;
blockInfo = new CodeBlockInfo { OuterStart = TextRange.FromBounds(sepStart, stream.Position) };
var langRange = TryConsumeContentLine();
if (langRange != null)
blockInfo.Language = stream.GetSubstringAt(langRange.Start, langRange.Length);
while (true)
{
var range = TryConsumeContentLine();
if (range == null)
break;
ReportArtifact(new CodeLineArtifact(blockInfo, range, 0, 0));
}
// If the stream ended without a closing fence, give an empty end.
if (blockInfo.OuterEnd == null)
blockInfo.OuterEnd = new TextRange(stream.Length, 0);
return true;
}
protected override bool ReadContent()
{
var blockInfo = new CodeBlockInfo { OuterStart = new TextRange(stream.Position, 0) };
lineStart = stream.Position;
if (!TryReadSpaces(spaceCount))
return false;
while (true)
{
var thisLineStart = lineStart;
var range = TryConsumeContentLine();
if (range == null)
break;
blockInfo.OuterEnd = new TextRange(range.End, 0);
// Get the character count of the indent, which may be different if tabs are involved.
var indentSize = range.Start - thisLineStart;
range.Expand(-indentSize, 0);
ReportArtifact(new CodeLineArtifact(blockInfo, range, indentSize, 0));
}
return true;
}
