/// <summary>
/// Process a full string block of a markdown table.
/// Split it by rows
/// Create the Table with correct number of columns
/// Fill the openXML table
/// </summary>
/// <param name="engine"></param>
/// <param name="markdown">The complete markdown table, must be correctly formatted</param>
private static void ProcessTable(Md2MlEngine engine, string markdown)
{
var rows = Regex.Split(markdown, "\r\n|\r|\n");
var firstLine = rows.First();
var secondLine = rows.Length >= 2 ? rows.Skip(1).First() : null;
var table = engine.CreateTable(firstLine.Trim('|').Split('|').Count());
engine.AddTableRow(table, firstLine.Trim('|').Split('|').ToList());
var patternSecondLine = PatternMatcher.GetMarkdownMatch(secondLine).Key;
if (string.IsNullOrEmpty(secondLine) ||
(patternSecondLine != ParaPattern.TableHeaderSeparation && patternSecondLine != ParaPattern.TableHeaderSeparation)) // TODO : Throw error : Table not well formatted
{
return;
}
// Define the table alignment properties
List <JustificationValues> cellJustification = new List <JustificationValues>();
var nbCols = secondLine.Trim('|').Split('|').Count();
var secondLineCells = secondLine.Trim('|').Split('|').ToList();
for (int i = 0; i < nbCols; i++)
{
var justification = JustificationValues.Left;
if (secondLineCells[i].StartsWith(":") && secondLineCells[i].EndsWith(":"))
{
justification = JustificationValues.Center;
}
else if (!secondLineCells[i].StartsWith(":") && secondLineCells[i].EndsWith(":"))
{
justification = JustificationValues.Right;
}
cellJustification.Add(justification);
}
// Process the rest of the table
foreach (var row in rows.Skip(2).ToList())
{
engine.AddTableRow(table, row.Trim('|').Split('|').ToList(), cellJustification);
}
}
public static void Parse(Md2MlEngine engine, string mdText)
{
var lineAndPattern = new List <KeyValuePair <ParaPattern, string[]> >();
var lines = mdText.Split('\n');
foreach (var line in lines)
{
lineAndPattern.Add(PatternMatcher.GetParagraphType(line));
}
bool OrderedList = false;
bool UnorderedList = false;
bool Table = false;
List <string> BulletItems = new List <string>();
List <string> NumberItems = new List <string>();
List <string> TableData = new List <string>();
foreach (var line in lineAndPattern)
{
Paragraph para;
switch (line.Key)
{
case ParaPattern.OrderedList:
if (Table)
{
ProcessTable(engine, TableData); Table = false;
}
if (UnorderedList)
{
ProcessBullets(engine, BulletItems, false); UnorderedList = false;
}
OrderedList = true;
NumberItems.Add(line.Value[1]);
break;
case ParaPattern.UnorderedList:
if (Table)
{
ProcessTable(engine, TableData); Table = false;
}
if (OrderedList)
{
ProcessBullets(engine, NumberItems, true); OrderedList = false;
}
UnorderedList = true;
BulletItems.Add(line.Value[1]);
break;
case ParaPattern.Image:
if (Table)
{
ProcessTable(engine, TableData); Table = false;
}
if (OrderedList || UnorderedList)
{
ProcessBullets(engine, OrderedList ? NumberItems : BulletItems, OrderedList); OrderedList = false; UnorderedList = false;
}
para = engine.CreateParagraph();
if (line.Value[2].StartsWith("http://") || line.Value[2].StartsWith("https://"))
{
engine.AddImage(new System.Net.WebClient().OpenRead(line.Value[2]));
}
else
{
engine.AddImage(System.IO.File.OpenRead(line.Value[2]));
}
break;
case ParaPattern.Table:
if (OrderedList || UnorderedList)
{
ProcessBullets(engine, OrderedList ? NumberItems : BulletItems, OrderedList); OrderedList = false; UnorderedList = false;
}
Table = true;
TableData.Add(line.Value[1]);
break;
case ParaPattern.CodeBlock:
if (Table)
{
ProcessTable(engine, TableData); Table = false;
}
if (OrderedList || UnorderedList)
{
ProcessBullets(engine, OrderedList ? NumberItems : BulletItems, OrderedList); OrderedList = false; UnorderedList = false;
}
para = engine.CreateParagraph(new ParaProperties()
{
StyleName = "CodeBlock"
});
engine.WriteText(para, line.Value[1]);
break;
case ParaPattern.Heading1:
if (Table)
{
ProcessTable(engine, TableData); Table = false;
}
if (OrderedList || UnorderedList)
{
ProcessBullets(engine, OrderedList ? NumberItems : BulletItems, OrderedList); OrderedList = false; UnorderedList = false;
}
para = engine.CreateParagraph(new ParaProperties()
{
StyleName = "Heading1"
});
engine.WriteText(para, line.Value[1]);
break;
case ParaPattern.Heading2:
if (Table)
{
ProcessTable(engine, TableData); Table = false;
}
if (OrderedList || UnorderedList)
{
ProcessBullets(engine, OrderedList ? NumberItems : BulletItems, OrderedList); OrderedList = false; UnorderedList = false;
}
para = engine.CreateParagraph(new ParaProperties()
{
StyleName = "Heading2"
});
engine.WriteText(para, line.Value[1]);
break;
case ParaPattern.Heading3:
if (Table)
{
ProcessTable(engine, TableData); Table = false;
}
if (OrderedList || UnorderedList)
{
ProcessBullets(engine, OrderedList ? NumberItems : BulletItems, OrderedList); OrderedList = false; UnorderedList = false;
}
para = engine.CreateParagraph(new ParaProperties()
{
StyleName = "Heading3"
});
engine.WriteText(para, line.Value[1]);
break;
case ParaPattern.Quote:
if (Table)
{
ProcessTable(engine, TableData); Table = false;
}
if (OrderedList || UnorderedList)
{
ProcessBullets(engine, OrderedList ? NumberItems : BulletItems, OrderedList); OrderedList = false; UnorderedList = false;
}
para = engine.CreateParagraph(new ParaProperties()
{
StyleName = "Quote"
});
engine.WriteText(para, line.Value[1]);
break;
case ParaPattern.CommanBlock:
default:
if (Table)
{
ProcessTable(engine, TableData); Table = false;
}
if (OrderedList || UnorderedList)
{
ProcessBullets(engine, OrderedList ? NumberItems : BulletItems, OrderedList); OrderedList = false; UnorderedList = false;
}
para = engine.CreateParagraph();
FormatText(engine, para, line.Value[1], new FontProperties());
//core.WriteText(para, line.Value[1]);
break;
}
}
if (Table)
{
ProcessTable(engine, TableData); Table = false;
}
if (OrderedList || UnorderedList)
{
ProcessBullets(engine, OrderedList ? NumberItems : BulletItems, OrderedList); OrderedList = false; UnorderedList = false;
}
}
/// <summary>
/// This method allows you to rebuild a paragraph without interpreting breaking lines if there is not a double space before.
/// Produces a counter in order to know how many lines are concatenated, in order to delete it after parsing it
/// </summary>
/// <param name="mdText">The text to parse line by line</param>
/// <param name="pattern">The pattern to detect real new lines. Allows to create a block with same nature (lists, paragraphs...)</param>
/// <returns></returns>
private static (int counter, string textBlock) BuildWithoutBreakingLines(string mdText, ParaPattern pattern)
{
var lines = Regex.Split(mdText, "\r\n|\r|\n").ToArray();
var previousLine = lines.First().TrimStart('>');
var output = new StringBuilder(previousLine);
int count = 1;
if (string.IsNullOrEmpty(previousLine))
{
return(counter : count, textBlock : output.ToString());
}
foreach (var line in lines.Skip(1))
{
// Break directly if processed line is empty
if (string.IsNullOrEmpty(line))
{
break;
}
var linePattern = PatternMatcher.GetMarkdownMatch(line).Key;
// If first pattern is a table, do not break until pattern does not match to any table pattern
bool isTableContinuing = pattern == ParaPattern.Table && (
linePattern == ParaPattern.Table ||
linePattern == ParaPattern.TableHeaderSeparation);
// Quotes are continuing if first pattern is quote
// And the current one equals to Quote or AnyChar
bool isQuoteContinuing = pattern == ParaPattern.Quote &&
(linePattern == ParaPattern.Quote ||
linePattern == ParaPattern.AnyChar);
// Paragraph types are continuing if previous line does not ends with double space
// And first pattern matches with the current one
bool isParagraphContinuing = (!previousLine.EndsWith(" ") &&
(pattern == ParaPattern.AnyChar && linePattern == pattern));
// If list is not continuing, then check if item is detected as a code block
bool isListContinuing = (pattern == ParaPattern.OrderedList || pattern == ParaPattern.UnorderedList) &&
(linePattern == ParaPattern.OrderedList ||
linePattern == ParaPattern.UnorderedList);
if ((pattern == ParaPattern.OrderedList || pattern == ParaPattern.UnorderedList) && !isListContinuing && linePattern == ParaPattern.CodeBlock)
{
try
{
linePattern = PatternMatcher.GetMatchFromPattern(line, ParaPattern.OrderedList).Key;
}
catch (Exception e)
{
linePattern = PatternMatcher.GetMatchFromPattern(line, ParaPattern.UnorderedList).Key;
}
isListContinuing = (linePattern == ParaPattern.OrderedList || linePattern == ParaPattern.UnorderedList);
}
if (!isTableContinuing && !isQuoteContinuing && !isParagraphContinuing && !isListContinuing)
{
break;
}
if (pattern == ParaPattern.TableHeaderSeparation ||
pattern == ParaPattern.Table ||
pattern == ParaPattern.OrderedList ||
pattern == ParaPattern.UnorderedList ||
pattern == ParaPattern.Quote)
{
output.AppendLine().Append(line.TrimStart('>'));
}
else
{
output.Append(line);
}
previousLine = line;
count++;
}
return(counter : count, textBlock : output.ToString());
}
/// <summary>
/// Parse the content, and detect all real lines breaks.
/// In fact, within markdown it is possible to write a unique paragraph, with line breaks.
/// If there is not a double space before the line break, it's the same paragraph, and the line break is not interpreted as is.
///
/// So in this parsing method, cut the content by "block" with same nature.
/// 1| Detect the paragraph type by the start of the line
/// 2| Process the content by its type
/// 3| Then remove the processed content, and continue to parse the next content
///
/// A block is detected by a <see cref="ParaPattern"/> which have an associated regex.
///
/// </summary>
/// <param name="engine">Describe an openXML object by code</param>
/// <param name="mdText">The markdown text to parse</param>
internal static void Parse(Md2MlEngine engine, string mdText)
{
while (!string.IsNullOrEmpty(mdText))
{
var firstLine = GetFirstLine(mdText);
var matchedPattern = PatternMatcher.GetMarkdownMatch(firstLine);
Paragraph para;
(int counter, string textBlock)rebuildText = default;
switch (matchedPattern.Key)
{
case ParaPattern.InfiniteHeading:
string titleChars = matchedPattern.Value.Groups[1].Value;
int titleLvl = titleChars.Count(c => c == '#');
titleLvl = titleLvl <= 9 ? titleLvl : 9;
para = engine.CreateParagraph(new ParaProperties()
{
StyleName = string.Concat("Heading", titleLvl.ToString())
});
engine.WriteText(para, matchedPattern.Value.Groups[2].Value);
mdText = DeleteLines(mdText);
continue;
case ParaPattern.Image:
var link = matchedPattern.Value.Groups[2].Value;
if (link.StartsWith("http://") || link.StartsWith("https://"))
{
engine.AddImage(new System.Net.WebClient().OpenRead(link));
}
else
{
engine.AddImage(ConvertRelativeToAbsolutePath(link, engine.GetFileDirectory()));
}
mdText = DeleteLines(mdText);
continue;
case ParaPattern.Table:
//case ParaPattern.TableHeaderSeparation:
rebuildText = BuildWithoutBreakingLines(mdText, ParaPattern.Table);
ProcessTable(engine, rebuildText.textBlock);
mdText = DeleteLines(mdText, rebuildText.counter);
continue;
case ParaPattern.OrderedList:
case ParaPattern.UnorderedList:
// TODO : Ordered list can contain unordered items inside and vice versa
rebuildText = BuildWithoutBreakingLines(mdText, ParaPattern.OrderedList);
ProcessBullets(engine, rebuildText.textBlock);
mdText = DeleteLines(mdText, rebuildText.counter);
continue;
case ParaPattern.CodeBlock:
// TODO : Improve the rendering - not a priority for my needs
rebuildText = BuildWithoutBreakingLines(mdText, ParaPattern.CodeBlock);
para = engine.CreateParagraph(new ParaProperties()
{
StyleName = DocStyles.CodeBlock.ToDescriptionString()
});
FormatText(engine, para, rebuildText.textBlock, new StyleProperties());
mdText = DeleteLines(mdText, rebuildText.counter);
continue;
case ParaPattern.Quote:
// Markdown supports nested quotes, but word does not
// So whatever, put the "nested" paragraph in the same quote
rebuildText = BuildWithoutBreakingLines(mdText, ParaPattern.Quote);
para = engine.CreateParagraph(new ParaProperties()
{
StyleName = DocStyles.Quote.ToDescriptionString()
});
foreach (var text in Regex.Split(rebuildText.textBlock, "\r\n|\r|\n"))
{
para.AppendChild(new Break());
FormatText(engine, para, text, new StyleProperties());
}
mdText = DeleteLines(mdText, rebuildText.counter);
continue;
case ParaPattern.AnyChar:
default:
rebuildText = BuildWithoutBreakingLines(mdText, matchedPattern.Key);
para = engine.CreateParagraph();
FormatText(engine, para, rebuildText.textBlock, new StyleProperties());
// engine.WriteText(para, text.textBlock);
mdText = DeleteLines(mdText, rebuildText.counter);
continue;
}
}
}
/// <summary>
/// Format a paragraph which could contains some text styles, Bold, Italics, Images and so on...
/// Split the markdown for each pattern found. Then append correctly that text or image into the same paragraph.
/// </summary>
/// <param name="core">The openXML object with a document, a body and a paragraph</param>
/// <param name="paragraph">The Paragraph object previously created</param>
/// <param name="markdown">The string to be processed</param>
/// <param name="fontProperties">Style properties to apply to the text</param>
internal static void FormatText(Md2MlEngine core, Paragraph paragraph, string markdown,
StyleProperties fontProperties)
{
var hasPattern = PatternMatcher.HasPatterns(markdown);
while (hasPattern)
{
var s = PatternMatcher.GetPatternsAndNonPatternText(markdown);
var newFontProperties = new StyleProperties();
switch (s.Key)
{
case StylePattern.BoldAndItalic:
newFontProperties.Bold = true;
newFontProperties.Italic = true;
FormatText(core, paragraph, s.Value[0], new StyleProperties());
FormatText(core, paragraph, s.Value[1], newFontProperties);
FormatText(core, paragraph, FramePendingString(s.Value, "***"), new StyleProperties());
break;
case StylePattern.Bold:
newFontProperties.Bold = true;
FormatText(core, paragraph, s.Value[0], new StyleProperties());
FormatText(core, paragraph, s.Value[1], newFontProperties);
FormatText(core, paragraph, FramePendingString(s.Value, "**"), new StyleProperties());
break;
case StylePattern.Italic:
newFontProperties.Italic = true;
FormatText(core, paragraph, s.Value[0], new StyleProperties());
FormatText(core, paragraph, s.Value[1], newFontProperties);
FormatText(core, paragraph, FramePendingString(s.Value, "*"), new StyleProperties());
break;
case StylePattern.MonospaceOrCode:
newFontProperties.StyleName = DocStyles.CodeReference.ToDescriptionString();
FormatText(core, paragraph, s.Value[0], new StyleProperties());
FormatText(core, paragraph, s.Value[1], newFontProperties);
FormatText(core, paragraph, FramePendingString(s.Value, "`"), new StyleProperties());
break;
case StylePattern.Strikethrough:
newFontProperties.Strikeout = true;
FormatText(core, paragraph, s.Value[0], new StyleProperties());
FormatText(core, paragraph, s.Value[1], newFontProperties);
FormatText(core, paragraph, FramePendingString(s.Value, "~~"), new StyleProperties());
break;
case StylePattern.Image:
var regex = PatternMatcher.GetStyleMatch(s.Value[1]);
FormatText(core, paragraph, s.Value[0], new StyleProperties());
core.AddImage(ConvertRelativeToAbsolutePath(regex.Value.Groups[2].Value, core.GetFileDirectory()), paragraph);
FormatText(core, paragraph, FramePendingString(s.Value, ""), new StyleProperties());
break;
case StylePattern.Underline:
newFontProperties.Underline = UnderlineValues.Single;
FormatText(core, paragraph, s.Value[0], new StyleProperties());
FormatText(core, paragraph, s.Value[1], newFontProperties);
FormatText(core, paragraph, FramePendingString(s.Value, "__"), new StyleProperties());
break;
}
return;
}
core.WriteText(paragraph, markdown, fontProperties);
}
