/* Function: MarkTextBoxes
*
* Finds all text boxes in a comment and marks their tokens as <Tokenization.CommentParsingType.CommentDecoration>.
* Vertical lines will only be detected if they are continuous throughout the comment and horizontal lines if they
* are connected to it. Freestanding horizontal lines are *not* detected here. This function tolerates differing
* symbols on corners and where embedded horizontal lines connect to the vertical. It also tolerates tokens
* marked with <Tokenization.CommentParsingType.CommentSymbol> differing.
*
* Examples:
*
* The box below will be marked completely, including the middle horizontal line.
*
* > // +----------+
* > // | Title |
* > // +----------+
* > // | Text |
* > // +----------+
*
* The middle horizontal line below will not be marked, because it is not attached.
*
* > // +----------+
* > // | Title |
* > // | -------- |
* > // | Text |
* > // +----------+
*
* Nor will the horizontal line below since there is no vertical.
*
* > // Title
* > // ----------
* > // Text
*
* Freestanding horizontal lines are not detected because they may be intended literally, such as when part of
* a code section. If you're not in such a section use <IsHorizontalLine()> before parsing a line to filter it out.
*
* > // (start code)
* > // +-----+
* > // | box |
* > // +-----+
* > // (end code)
*/
public static void MarkTextBoxes(PossibleDocumentationComment comment)
{
char symbolA, symbolB, symbolC;
int symbolACount, symbolBCount, symbolCCount;
char leftSymbol = '\0';
char rightSymbol = '\0';
int leftSymbolCount = 0;
int rightSymbolCount = 0;
bool symbolIsAloneOnLine = false;
bool testedForVerticalLines = false;
LineIterator line = comment.Start;
TokenIterator lineStart, lineEnd;
// This should be okay to use since line numbers start at one.
IDObjects.NumberSet horizontalLines = new IDObjects.NumberSet();
// Skip leading blank lines since it's okay if they're not part of the text box.
while (line < comment.End && line.IsEmpty(LineBoundsMode.CommentContent))
{
line.Next();
}
while (line < comment.End && line.IsEmpty(LineBoundsMode.CommentContent) == false)
{
line.GetBounds(LineBoundsMode.ExcludeWhitespace, out lineStart, out lineEnd);
// Shrink the line to exclude its comment symbols, if any. We didn't do this using the line bounds mode because
// we need to know whether there was any whitespace between them and any horizontal lines.
bool commentSymbolWithoutWhitespaceAtStart = false;
bool commentSymbolWithoutWhitespaceAtEnd = false;
if (lineStart.CommentParsingType == CommentParsingType.CommentSymbol)
{
commentSymbolWithoutWhitespaceAtStart = true;
do
{
lineStart.Next();
}while (lineStart.CommentParsingType == CommentParsingType.CommentSymbol);
if (lineStart.FundamentalType == FundamentalType.Whitespace)
{
commentSymbolWithoutWhitespaceAtStart = false;
do
{
lineStart.Next();
}while (lineStart.FundamentalType == FundamentalType.Whitespace);
}
}
lineEnd.Previous();
if (lineEnd.CommentParsingType == CommentParsingType.CommentSymbol)
{
commentSymbolWithoutWhitespaceAtEnd = true;
do
{
lineEnd.Previous();
}while (lineEnd.CommentParsingType == CommentParsingType.CommentSymbol);
if (lineEnd.FundamentalType == FundamentalType.Whitespace)
{
commentSymbolWithoutWhitespaceAtEnd = false;
do
{
lineEnd.Previous();
}while (lineEnd.FundamentalType == FundamentalType.Whitespace);
}
}
lineEnd.Next();
// Horizontal line detection
bool isHorizontalLine = false;
CountSymbolLine(ref lineStart, lineEnd, out symbolA, out symbolB, out symbolC,
out symbolACount, out symbolBCount, out symbolCCount);
if (commentSymbolWithoutWhitespaceAtStart == true &&
commentSymbolWithoutWhitespaceAtEnd == true &&
symbolACount >= 4 && symbolBCount == 0)
{
isHorizontalLine = true;
}
else if (commentSymbolWithoutWhitespaceAtStart == true &&
symbolACount >= 4 &&
(symbolBCount == 0 || (symbolBCount <= 3 && symbolCCount == 0)))
{
isHorizontalLine = true;
}
else if (commentSymbolWithoutWhitespaceAtEnd == true &&
((symbolACount >= 1 && symbolACount <= 3 && symbolBCount >= 4 && symbolCCount == 0) ||
(symbolACount >= 4 && symbolBCount == 0)))
{
isHorizontalLine = true;
}
else if ((symbolACount >= 4 && symbolBCount == 0) ||
(symbolACount >= 1 && symbolACount <= 3 && symbolBCount >= 4 && symbolCCount <= 3))
{
isHorizontalLine = true;
}
// The horizontal line has to be the only thing on the line to count.
if (isHorizontalLine && lineStart == lineEnd)
{
horizontalLines.Add(line.LineNumber);
}
// Vertical line detection
else if (testedForVerticalLines == false)
{
// We permit the very first line to be different to allow for this:
// /** text
// * text
// */
//
// However, don't skip the first line if it's a one line comment or we wouldn't be able to handle this:
// ### text
//
if (line != comment.Start ||
(comment.End.LineNumber - comment.Start.LineNumber) == 1)
{
if (CountEdgeSymbols(line, out leftSymbol, out rightSymbol, out leftSymbolCount, out rightSymbolCount,
out symbolIsAloneOnLine) == false)
{
return;
}
testedForVerticalLines = true;
}
}
else // testedForVerticalLines == true
{
char lineLeftSymbol, lineRightSymbol;
int lineLeftSymbolCount, lineRightSymbolCount;
bool lineSymbolIsAloneOnLine;
CountEdgeSymbols(line, out lineLeftSymbol, out lineRightSymbol, out lineLeftSymbolCount, out lineRightSymbolCount,
out lineSymbolIsAloneOnLine);
// Account for a lone symbol being the right symbol.
if (lineSymbolIsAloneOnLine == true && symbolIsAloneOnLine == false && leftSymbolCount == 0 && rightSymbolCount > 0)
{
if (lineLeftSymbol != rightSymbol || lineLeftSymbolCount != rightSymbolCount)
{
return;
}
}
else if (lineSymbolIsAloneOnLine == false && symbolIsAloneOnLine == true && lineLeftSymbolCount == 0 && lineRightSymbolCount > 0)
{
if (lineRightSymbol != leftSymbol || lineRightSymbolCount != leftSymbolCount)
{
return;
}
rightSymbol = leftSymbol;
leftSymbol = '\0';
rightSymbolCount = leftSymbolCount;
leftSymbolCount = 0;
}
// Otherwise it's okay to do a straight compare.
else
{
if (lineLeftSymbol != leftSymbol || lineLeftSymbolCount != leftSymbolCount)
{
leftSymbol = '\0';
leftSymbolCount = 0;
}
if (lineRightSymbol != rightSymbol || lineRightSymbolCount != rightSymbolCount)
{
rightSymbol = '\0';
rightSymbolCount = 0;
}
if (leftSymbolCount == 0 && rightSymbolCount == 0)
{
return;
}
}
// Turn off the overall alone flag if this line didn't have it.
if (lineSymbolIsAloneOnLine == false)
{
symbolIsAloneOnLine = false;
}
}
line.Next();
}
// If we stopped because we hit a blank line, this comment is only acceptable for marking text boxes if all the lines
// left are blank.
while (line < comment.End && line.IsEmpty(LineBoundsMode.CommentContent))
{
line.Next();
}
if (line != comment.End)
{
return;
}
// If we made it this far without returning it means we have a valid text box which we have to mark as comment decoration.
line = comment.Start;
while (line < comment.End)
{
line.GetBounds(LineBoundsMode.CommentContent, out lineStart, out lineEnd);
if (horizontalLines.Contains(line.LineNumber))
{
while (lineStart < lineEnd)
{
lineStart.CommentParsingType = CommentParsingType.CommentDecoration;
lineStart.Next();
}
}
else if (lineEnd > lineStart)
{
// We test the characters against the symbols to account for any exceptions we allowed to go through
// in previous code.
for (int i = 0; i < leftSymbolCount; i++)
{
if (lineStart.Character == leftSymbol)
{
lineStart.CommentParsingType = CommentParsingType.CommentDecoration;
lineStart.Next();
}
}
lineEnd.Previous();
for (int i = 0; i < rightSymbolCount; i++)
{
if (lineEnd.Character == rightSymbol)
{
lineEnd.CommentParsingType = CommentParsingType.CommentDecoration;
lineEnd.Previous();
}
}
}
line.Next();
}
}
/* Function: FindIncludeInOutput
* Extracts and returns any comment content marked "include in output". All comment symbols and extra indents
* will be removed. Returns null if the comment doesn't have any.
*/
protected string FindIncludeInOutput(PossibleDocumentationComment comment)
{
Comments.LineFinder.MarkTextBoxes(comment);
LineIterator iterator = comment.Start;
// Find the "include in output" header if it exists
while (iterator < comment.End &&
iterator.Match(IncludeInOutputRegex, LineBoundsMode.CommentContent).Success == false)
{
iterator.Next();
}
if (iterator >= comment.End)
{
return(null);
}
// Find the bounds of the content excluding whitespace and the shared indent level
iterator.Next();
while (iterator < comment.End && iterator.IsEmpty(LineBoundsMode.CommentContent))
{
iterator.Next();
}
LineIterator start = iterator;
LineIterator end = iterator;
int commonIndent = 9999;
while (iterator < comment.End)
{
if (iterator.IsEmpty(LineBoundsMode.CommentContent))
{
iterator.Next();
}
else
{
if (iterator.Indent(LineBoundsMode.CommentContent) < commonIndent)
{
commonIndent = iterator.Indent(LineBoundsMode.CommentContent);
}
iterator.Next();
end = iterator;
}
}
// Build and return the comment content
if (start >= end)
{
return(null);
}
StringBuilder output = new StringBuilder();
do
{
int indentDifference = start.Indent(LineBoundsMode.CommentContent) - commonIndent;
if (indentDifference > 0)
{
output.Append(' ', indentDifference);
}
start.AppendTo(output, LineBoundsMode.CommentContent);
output.AppendLine();
start.Next();
}while (start < end);
return(output.ToString());
}
