public void AddItem(ParagraphLineItem item)
{
_items.Add(item);
}
IEnumerable <ParagraphLine> readLines()
{
// We're processing "blocks" out of the lexer. Blocks are either:
// - xml tags - these will always come in as a single block
// - slabs of text - these will come one per line (but they may have a tag breaking up two slabs on the one line).
//
// We need to break them into what we think the lines should be.
// Start reading blocks from the lexer
ParagraphLine paragraphLine = new ParagraphLine();
foreach (string block in _xmlBlockLexer)
{
// Create a new item to put this block into.
ParagraphLineItem item = new ParagraphLineItem();
// If the block is a code or "c" block then we treat the block as a single, non-reflowable chunk.
if (block.StartsWith("<code") || block.StartsWith("<c") || block.StartsWith("<see") || block.StartsWith("<paramref") || block.StartsWith("<typeparamref"))
{
item.Text = block;
item.ItemType = ItemType.NonReflowableBlock;
paragraphLine.AddItem(item);
}
// If the block is some other xml tag then treat it as a line (we may compress these again later).
else if (block.StartsWith("<"))
{
/*
* // Yield the previous line
* yield return paragraphLine;
*
* // Create a new line
* paragraphLine = new ParagraphLine();
*/
// And add the new tag into it
item.Text = block;
item.ItemType = ItemType.XmlElement;
paragraphLine.AddItem(item);
/*
* // Yield that
* yield return paragraphLine;
*
* // Create a new line
* paragraphLine = new ParagraphLine();
*/
}
// Otherwise it must be a text block so deal with that.
else
{
// Split the text block into lines
string[] lines = block.Replace("\r", "").Split('\n');
// Process each line
for (int i = 0; i < lines.Length; i++)
{
// Create an item for this line
string line = lines[i];
item.Text = line;
item.ItemType = line.Trim().Length == 0 ? ItemType.XmlSpace : ItemType.Text;
paragraphLine.AddItem(item);
// If we're not the last line then yield this line (last line may contain other sections).
if (i != lines.Length - 1)
{
yield return(paragraphLine);
item = new ParagraphLineItem();
paragraphLine = new ParagraphLine();
}
}
}
}
if (paragraphLine.Items.Count > 0)
{
yield return(paragraphLine);
}
}
public string ReflowToLineLength(IEnumerable <Paragraph> paragraphs, int maxLineLength)
{
LineBuilder lb = new LineBuilder();
bool firstParagraph = true;
foreach (Paragraph paragraph in paragraphs)
{
if (!firstParagraph)
{
lb.Append("\r\n");
}
ParagraphLineItem previousItem = null;
foreach (ParagraphLine paragraphLine in paragraph.Lines)
{
foreach (ParagraphLineItem lineItem in paragraphLine.Items)
{
if (lineItem.ItemType == ItemType.XmlElement ||
lineItem.ItemType == ItemType.NonReflowableBlock)
{
if ( //if current line is empty, no matter how big text is, just append it (to
// not create extra lines.
lb.CurrentLine.Trim().Length > 0 &&
//Append new line otherwise
lb.CurrentLine.Length + lineItem.FirstLine.Length > maxLineLength)
{
lb.AppendMultilineBlock("\r\n" + paragraph.Offset);
}
lb.AppendMultilineBlock(lineItem.Text);
}
//Space between XML elements is not reflown.
else if (lineItem.ItemType == ItemType.XmlSpace)
{
if (previousItem != null && previousItem.IsForcingNewLine)
{
// do not create new line if it is the last item
// in the paragraph
if ((lineItem != paragraphLine.Items[paragraphLine.Items.Count - 1]) ||
(paragraphLine != paragraph.Lines[paragraph.Lines.Count - 1]))
{
lb.AppendMultilineBlock(
"\r\n" + paragraph.Offset);
}
}
else
{
lb.AppendMultilineBlock(lineItem.Text);
}
}
else if (lineItem.ItemType == ItemType.Text)
{
string text = lineItem.Text;
if (lineItem == paragraphLine.Items[0])
{
text = text.TrimStart();
}
if (previousItem != null && previousItem.IsForcingNewLine)
{
lb.AppendMultilineBlock("\r\n" + paragraph.Offset);
text = text.TrimStart();
}
string[] words = text.Split(' ');
for (int i = 0; i < words.Length; i++)
{
// append the space at the start of the line
if (lb.CurrentLine.Length == 0)
{
lb.AppendMultilineBlock(paragraph.Offset);
}
string word = words[i];
if (lb.CurrentLine.Length == paragraph.Offset.Length && word.Trim().Length == 0)
{
continue;
}
//prepend space if this is not first word in block and not first word on paragraph line
//or this is first word in block and block is appended to previous line.
bool previousBlockIsText = previousItem != null && previousItem.ItemType == ItemType.Text;
string toAppend = (lb.CurrentLine.Length > paragraph.Offset.Length && (i > 0 || previousBlockIsText) ? " " : "") + word;
if (lb.CurrentLine.Length + toAppend.Length > maxLineLength)
{
lb.AppendMultilineBlock("\r\n" + paragraph.Offset);
toAppend = word;
}
lb.AppendMultilineBlock(toAppend);
}
}
previousItem = lineItem;
}
}
firstParagraph = false;
}
return(lb.ToString());
}