// Parse just the link target
// For reference link definition, this is the bit after "[id]: thisbit"
// For inline link, this is the bit in the parens: [link text](thisbit)
internal static LinkDefinition ParseLinkTarget(StringScanner p, string id, bool ExtraMode)
{
// Skip whitespace
p.SkipWhitespace();
// End of string?
if (p.eol)
return null;
// Create the link definition
var r = new LinkDefinition(id);
// Is the url enclosed in angle brackets
if (p.SkipChar('<'))
{
// Extract the url
p.Mark();
// Find end of the url
while (p.current != '>')
{
if (p.eof)
return null;
p.SkipEscapableChar(ExtraMode);
}
string url = p.Extract();
if (!p.SkipChar('>'))
return null;
// Unescape it
r.url = Utils.UnescapeString(url.Trim(), ExtraMode);
// Skip whitespace
p.SkipWhitespace();
}
else
{
// Find end of the url
p.Mark();
int paren_depth = 1;
while (!p.eol)
{
char ch=p.current;
if (char.IsWhiteSpace(ch))
break;
if (id == null)
{
if (ch == '(')
paren_depth++;
else if (ch == ')')
{
paren_depth--;
if (paren_depth==0)
break;
}
}
p.SkipEscapableChar(ExtraMode);
}
r.url = Utils.UnescapeString(p.Extract().Trim(), ExtraMode);
}
p.SkipLinespace();
// End of inline target
if (p.DoesMatch(')'))
return r;
bool bOnNewLine = p.eol;
int posLineEnd = p.position;
if (p.eol)
{
p.SkipEol();
p.SkipLinespace();
}
// Work out what the title is delimited with
char delim;
switch (p.current)
{
case '\'':
case '\"':
delim = p.current;
break;
case '(':
delim = ')';
break;
default:
if (bOnNewLine)
{
p.position = posLineEnd;
return r;
}
else
return null;
}
// Skip the opening title delimiter
p.SkipForward(1);
// Find the end of the title
p.Mark();
while (true)
{
if (p.eol)
return null;
if (p.current == delim)
{
if (delim != ')')
{
int savepos = p.position;
// Check for embedded quotes in title
// Skip the quote and any trailing whitespace
p.SkipForward(1);
p.SkipLinespace();
// Next we expect either the end of the line for a link definition
// or the close bracket for an inline link
if ((id == null && p.current != ')') ||
(id != null && !p.eol))
{
continue;
}
p.position = savepos;
}
// End of title
break;
}
p.SkipEscapableChar(ExtraMode);
}
// Store the title
r.title = Utils.UnescapeString(p.Extract(), ExtraMode);
// Skip closing quote
p.SkipForward(1);
// Done!
return r;
}
// Parse just the link target
// For reference link definition, this is the bit after "[id]: thisbit"
// For inline link, this is the bit in the parens: [link text](thisbit)
internal static LinkDefinition ParseLinkTarget(StringScanner p, string id, bool ExtraMode)
{
// Skip whitespace
p.SkipWhitespace();
// End of string?
if (p.eol)
{
return(null);
}
// Create the link definition
var r = new LinkDefinition(id);
// Is the url enclosed in angle brackets
if (p.SkipChar('<'))
{
// Extract the url
p.Mark();
// Find end of the url
while (p.current != '>')
{
if (p.eof)
{
return(null);
}
p.SkipEscapableChar(ExtraMode);
}
string url = p.Extract();
if (!p.SkipChar('>'))
{
return(null);
}
// Unescape it
r.url = Utils.UnescapeString(url.Trim(), ExtraMode);
// Skip whitespace
p.SkipWhitespace();
}
else
{
// Find end of the url
p.Mark();
int paren_depth = 1;
while (!p.eol)
{
char ch = p.current;
if (char.IsWhiteSpace(ch))
{
break;
}
if (id == null)
{
if (ch == '(')
{
paren_depth++;
}
else if (ch == ')')
{
paren_depth--;
if (paren_depth == 0)
{
break;
}
}
}
p.SkipEscapableChar(ExtraMode);
}
r.url = Utils.UnescapeString(p.Extract().Trim(), ExtraMode);
}
p.SkipLinespace();
// End of inline target
if (p.DoesMatch(')'))
{
return(r);
}
bool bOnNewLine = p.eol;
int posLineEnd = p.position;
if (p.eol)
{
p.SkipEol();
p.SkipLinespace();
}
// Work out what the title is delimited with
char delim;
switch (p.current)
{
case '\'':
case '\"':
delim = p.current;
break;
case '(':
delim = ')';
break;
default:
if (bOnNewLine)
{
p.position = posLineEnd;
return(r);
}
else
{
return(null);
}
}
// Skip the opening title delimiter
p.SkipForward(1);
// Find the end of the title
p.Mark();
while (true)
{
if (p.eol)
{
return(null);
}
if (p.current == delim)
{
if (delim != ')')
{
int savepos = p.position;
// Check for embedded quotes in title
// Skip the quote and any trailing whitespace
p.SkipForward(1);
p.SkipLinespace();
// Next we expect either the end of the line for a link definition
// or the close bracket for an inline link
if ((id == null && p.current != ')') ||
(id != null && !p.eol))
{
continue;
}
p.position = savepos;
}
// End of title
break;
}
p.SkipEscapableChar(ExtraMode);
}
// Store the title
r.title = Utils.UnescapeString(p.Extract(), ExtraMode);
// Skip closing quote
p.SkipForward(1);
// Done!
return(r);
}
public List <TableCellDefinition> ParseRow(StringScanner p)
{
p.SkipLinespace();
if (p.eol)
{
return(null); // Blank line ends the table
}
bool bAnyBars = LeadingBar;
if (LeadingBar && !p.SkipChar('|'))
{
return(null);
}
// Create the row
List <TableCellDefinition> row = new List <TableCellDefinition>();
// Parse all columns except the last
int totalColSpan = 0;
while (!p.eol)
{
// Build new TableCellDefinition
var cell = new TableCellDefinition();
bool bAlignLeft = false;
bool bAlignRight = false;
// Check custom cell alignment
bAlignLeft = p.SkipChar(':');
// Check custom cell style
if (p.SkipString("# "))
{
cell.CellStyle = TableCellStyle.TH;
}
// Find the next vertical bar
p.Mark();
while (!p.eol && p.current != '|')
{
p.SkipForward(1);
}
// Check custom cell alignment
bAlignRight = p.DoesMatch(-2, " :");
// Get cell content
cell.Content = p.Extract(0, (bAlignRight ? -2 : 0)).Trim();
// Get colspan
bAnyBars |= p.SkipChar('|');
int colSpan = 1;
while (p.SkipChar('|'))
{
colSpan++;
}
cell.ColSpan = colSpan;
totalColSpan += colSpan;
// Set cell alignment
if (bAlignLeft && bAlignRight)
{
cell.Alignment = TableCellAlignment.Center;
}
else if (bAlignLeft)
{
cell.Alignment = TableCellAlignment.Left;
}
else if (bAlignRight)
{
cell.Alignment = TableCellAlignment.Right;
}
// Add cell to row
row.Add(cell);
}
// Require at least one bar to continue the table
if (!bAnyBars)
{
return(null);
}
// Add missing columns in Columns
while (Columns.Count < totalColSpan)
{
Columns.Add(TableCellAlignment.NA);
}
p.SkipEol();
return(row);
}
public List<TableCellDefinition> ParseRow(StringScanner p)
{
p.SkipLinespace();
if (p.eol)
return null; // Blank line ends the table
bool bAnyBars = LeadingBar;
if (LeadingBar && !p.SkipChar('|'))
{
return null;
}
// Create the row
List<TableCellDefinition> row = new List<TableCellDefinition>();
// Parse all columns except the last
int totalColSpan = 0;
while (!p.eol)
{
// Build new TableCellDefinition
var cell = new TableCellDefinition();
bool bAlignLeft = false;
bool bAlignRight = false;
// Check custom cell alignment
bAlignLeft = p.SkipChar(':');
// Check custom cell style
if (p.SkipString("# "))
cell.CellStyle = TableCellStyle.TH;
// Find the next vertical bar
p.Mark();
while (!p.eol && p.current != '|')
p.SkipForward(1);
// Check custom cell alignment
bAlignRight = p.DoesMatch(-2, " :");
// Get cell content
cell.Content = p.Extract(0, (bAlignRight ? -2 : 0)).Trim();
// Get colspan
bAnyBars |= p.SkipChar('|');
int colSpan = 1;
while (p.SkipChar('|')) colSpan++;
cell.ColSpan = colSpan;
totalColSpan += colSpan;
// Set cell alignment
if (bAlignLeft && bAlignRight)
cell.Alignment = TableCellAlignment.Center;
else if (bAlignLeft)
cell.Alignment = TableCellAlignment.Left;
else if (bAlignRight)
cell.Alignment = TableCellAlignment.Right;
// Add cell to row
row.Add(cell);
}
// Require at least one bar to continue the table
if (!bAnyBars)
return null;
// Add missing columns in Columns
while (Columns.Count < totalColSpan)
Columns.Add(TableCellAlignment.NA);
p.SkipEol();
return row;
}
