private void TerminateLastRow(BlockProcessor state, GridTableState tableState, Table gridTable, bool isLastRow)
{
var columns = tableState.ColumnSlices;
TableRow currentRow = null;
foreach (var columnSlice in columns)
{
if (columnSlice.CurrentCell != null)
{
if (currentRow == null)
{
currentRow = new TableRow();
}
currentRow.Add(columnSlice.CurrentCell);
columnSlice.BlockProcessor.Close(columnSlice.CurrentCell);
}
// Renew the block parser processor (or reset it for the last row)
if (columnSlice.BlockProcessor != null)
{
columnSlice.BlockProcessor.ReleaseChild();
columnSlice.BlockProcessor = isLastRow ? null : state.CreateChild();
}
// Create or erase the cell
if (isLastRow || columnSlice.CurrentColumnSpan == 0)
{
// We don't need the cell anymore if we have a last row
// Or the cell has a columnspan == 0
columnSlice.CurrentCell = null;
}
else
{
// Else we can create a new cell
columnSlice.CurrentCell = new TableCell(this)
{
ColumnSpan = columnSlice.CurrentColumnSpan
};
if (columnSlice.BlockProcessor == null)
{
columnSlice.BlockProcessor = state.CreateChild();
}
// Ensure that the BlockParser is aware that the TableCell is the top-level container
columnSlice.BlockProcessor.Open(columnSlice.CurrentCell);
}
}
if (currentRow != null)
{
gridTable.Add(currentRow);
}
}
private static void Undo(BlockProcessor processor, GridTableState tableState, Table gridTable)
{
var parser = processor.Parsers.FindExact <ParagraphBlockParser>();
// Discard the grid table
var parent = gridTable.Parent;
processor.Discard(gridTable);
var paragraphBlock = new ParagraphBlock(parser)
{
Lines = tableState.Lines,
};
parent.Add(paragraphBlock);
processor.Open(paragraphBlock);
}
private static void TerminateCurrentRow(BlockProcessor processor, GridTableState tableState, Table gridTable, bool isLastRow)
{
var columns = tableState.ColumnSlices;
TableRow currentRow = null;
for (int i = 0; i < columns.Count; i++)
{
var columnSlice = columns[i];
if (columnSlice.CurrentCell != null)
{
if (currentRow == null)
{
currentRow = new TableRow();
}
// If this cell does not already belong to a row
if (columnSlice.CurrentCell.Parent == null)
{
currentRow.Add(columnSlice.CurrentCell);
}
// If the cell is not going to span through to the next row
if (columnSlice.CurrentCell.AllowClose)
{
columnSlice.BlockProcessor.Close(columnSlice.CurrentCell);
}
}
// Renew the block parser processor (or reset it for the last row)
if (columnSlice.BlockProcessor != null && (columnSlice.CurrentCell == null || columnSlice.CurrentCell.AllowClose))
{
columnSlice.BlockProcessor.ReleaseChild();
columnSlice.BlockProcessor = isLastRow ? null : processor.CreateChild();
}
// Create or erase the cell
if (isLastRow || columnSlice.CurrentColumnSpan == 0 || (columnSlice.CurrentCell != null && columnSlice.CurrentCell.AllowClose))
{
// We don't need the cell anymore if we have a last row
// Or the cell has a columnspan == 0
// And the cell does not have to be kept open to span rows
columnSlice.CurrentCell = null;
}
}
if (currentRow != null && currentRow.Count > 0)
{
gridTable.Add(currentRow);
}
}
private BlockState HandleNewRow(BlockProcessor processor, GridTableState tableState, Table gridTable)
{
var columns = tableState.ColumnSlices !;
SetRowSpanState(columns, processor.Line, out bool isHeaderRow, out bool hasRowSpan);
SetColumnSpanState(columns, processor.Line);
TerminateCurrentRow(processor, tableState, gridTable, false);
if (isHeaderRow)
{
for (int i = 0; i < gridTable.Count; i++)
{
var row = (TableRow)gridTable[i];
row.IsHeader = true;
}
}
tableState.StartRowGroup = gridTable.Count;
if (hasRowSpan)
{
HandleContents(processor, tableState, gridTable);
}
return(BlockState.ContinueDiscard);
}
private BlockState HandleContents(BlockProcessor processor, GridTableState tableState, Table gridTable)
{
var isRowLine = processor.CurrentChar == '+';
var columns = tableState.ColumnSlices;
var line = processor.Line;
SetColumnSpanState(columns, line);
if (!isRowLine && !CanContinueRow(columns))
{
TerminateCurrentRow(processor, tableState, gridTable, false);
}
for (int i = 0; i < columns.Count;)
{
var columnSlice = columns[i];
var nextColumnIndex = i + columnSlice.CurrentColumnSpan;
// If the span is 0, we exit
if (nextColumnIndex == i)
{
break;
}
var nextColumn = nextColumnIndex < columns.Count ? columns[nextColumnIndex] : null;
var sliceForCell = line;
sliceForCell.Start = line.Start + columnSlice.Start + 1;
if (nextColumn != null)
{
sliceForCell.End = line.Start + nextColumn.Start - 1;
}
else
{
var columnEnd = columns[columns.Count - 1].End;
var columnEndChar = line.PeekCharExtra(columnEnd);
// If there is a `|` (or a `+` in the case that we are dealing with a row line
// with spanned contents) exactly at the expected end of the table row, we cut the line
// otherwise we allow to have the last cell of a row to be open for longer cell content
if (columnEndChar == '|' || (isRowLine && columnEndChar == '+'))
{
sliceForCell.End = line.Start + columnEnd - 1;
}
else if (line.PeekCharExtra(line.End) == '|')
{
sliceForCell.End = line.End - 1;
}
}
sliceForCell.TrimEnd();
if (!isRowLine || !IsRowSeperator(sliceForCell))
{
if (columnSlice.CurrentCell == null)
{
columnSlice.CurrentCell = new TableCell(this)
{
ColumnSpan = columnSlice.CurrentColumnSpan,
ColumnIndex = i
};
if (columnSlice.BlockProcessor == null)
{
columnSlice.BlockProcessor = processor.CreateChild();
}
// Ensure that the BlockParser is aware that the TableCell is the top-level container
columnSlice.BlockProcessor.Open(columnSlice.CurrentCell);
}
// Process the content of the cell
columnSlice.BlockProcessor.LineIndex = processor.LineIndex;
columnSlice.BlockProcessor.ProcessLine(sliceForCell);
}
// Go to next column
i = nextColumnIndex;
}
return(BlockState.ContinueDiscard);
}
public override BlockState TryOpen(BlockProcessor processor)
{
// A grid table cannot start more than an indent
if (processor.IsCodeIndent)
{
return(BlockState.None);
}
var line = processor.Line;
GridTableState tableState = null;
// Match the first row that should be of the minimal form: +---------------
var c = line.CurrentChar;
var lineStart = line.Start;
while (c == '+')
{
var columnStart = line.Start;
line.NextChar();
line.TrimStart();
// if we have reached the end of the line, exit
c = line.CurrentChar;
if (c == 0)
{
break;
}
// Parse a column alignment
TableColumnAlign?columnAlign;
if (!TableHelper.ParseColumnHeader(ref line, '-', out columnAlign))
{
return(BlockState.None);
}
tableState = tableState ?? new GridTableState {
Start = processor.Start, ExpectRow = true
};
tableState.AddColumn(columnStart - lineStart, line.Start - lineStart, columnAlign);
c = line.CurrentChar;
}
if (c != 0 || tableState == null)
{
return(BlockState.None);
}
// Store the line (if we need later to build a ParagraphBlock because the GridTable was in fact invalid)
tableState.AddLine(ref processor.Line);
var table = new Table(this);
table.SetData(typeof(GridTableState), tableState);
// Calculate the total width of all columns
int totalWidth = 0;
foreach (var columnSlice in tableState.ColumnSlices)
{
totalWidth += columnSlice.End - columnSlice.Start - 1;
}
// Store the column width and alignment
foreach (var columnSlice in tableState.ColumnSlices)
{
var columnDefinition = new TableColumnDefinition
{
// Column width proportional to the total width
Width = (float)(columnSlice.End - columnSlice.Start - 1) * 100.0f / totalWidth,
Alignment = columnSlice.Align
};
table.ColumnDefinitions.Add(columnDefinition);
}
processor.NewBlocks.Push(table);
return(BlockState.ContinueDiscard);
}
private BlockState ParseRowSeparator(BlockProcessor state, GridTableState tableState, Table gridTable)
{
// A grid table must start with a line like this:
// + ------------- + ------------ + ---------------------------------------- +
// Spaces are optional
var line = state.Line;
var c = line.CurrentChar;
bool isFirst = true;
var delimiterChar = '\0';
while (true)
{
if (c == '+')
{
line.NextChar();
if (line.IsEmptyOrWhitespace())
{
if (isFirst)
{
return(BlockState.None);
}
break;
}
TableColumnAlign align;
if (TableHelper.ParseColumnHeaderDetect(ref line, ref delimiterChar, out align))
{
isFirst = false;
c = line.CurrentChar;
continue;
}
}
// If we have any other characters, this is an invalid line
return(BlockState.None);
}
// If we have an header row
var isHeader = delimiterChar == '=';
// Terminate the current row
TerminateLastRow(state, tableState, gridTable, false);
// If we had a header row separator, we can mark all rows since last row separator
// to be header rows
if (isHeader)
{
for (int i = tableState.StartRowGroup; i < gridTable.Count; i++)
{
var row = (TableRow)gridTable[i];
row.IsHeader = true;
}
}
// Makr the next start row group continue on the next row
tableState.StartRowGroup = gridTable.Count;
// We don't keep the line
return(BlockState.ContinueDiscard);
}
public override BlockState TryOpen(BlockProcessor processor)
{
// A grid table cannot start more than an indent
if (processor.IsCodeIndent)
{
return(BlockState.None);
}
var line = processor.Line;
// A grid table must start with a line like this:
// + ------------- + ------------ + ---------------------------------------- +
// Spaces are optional
GridTableState tableState = null;
var c = line.CurrentChar;
var startPosition = processor.Start;
while (true)
{
if (c == '+')
{
var startCharacter = line.Start;
line.NextChar();
if (line.IsEmptyOrWhitespace())
{
if (tableState == null)
{
return(BlockState.None);
}
break;
}
TableColumnAlign align;
if (TableHelper.ParseColumnHeader(ref line, '-', out align))
{
if (tableState == null)
{
tableState = new GridTableState()
{
Start = processor.Start,
ExpectRow = true,
};
}
tableState.AddColumn(startCharacter - startPosition, line.Start - 1 - startPosition, align);
c = line.CurrentChar;
continue;
}
}
// If we have any other characters, this is an invalid line
return(BlockState.None);
}
// Store the line (if we need later to build a ParagraphBlock because the GridTable was in fact invalid)
tableState.AddLine(ref processor.Line);
// Create the grid table
var table = new Table(this);
table.SetData(typeof(GridTableState), tableState);
// Calculate the total width of all columns
int totalWidth = 0;
foreach (var columnSlice in tableState.ColumnSlices)
{
totalWidth += columnSlice.End - columnSlice.Start;
}
// Store the column width and alignment
foreach (var columnSlice in tableState.ColumnSlices)
{
var columnDefinition = new TableColumnDefinition
{
// Column width proportional to the total width
Width = (float)(columnSlice.End - columnSlice.Start) * 100.0f / totalWidth,
Alignment = columnSlice.Align,
};
table.ColumnDefinitions.Add(columnDefinition);
}
processor.NewBlocks.Push(table);
return(BlockState.ContinueDiscard);
}