/// <summary>
/// Gets the line indicators for a given character range.
/// </summary>
/// <param name="lineIndex">Index of the line.</param>
/// <param name="startCharacterIndex">Start character in the line text.</param>
/// <param name="endCharacterIndex">End character in the line text.</param>
/// <returns>
/// An enumerable with the indicators or <see langword="null"/> for
/// none.
/// </returns>
public override IEnumerable <ILineIndicator> GetLineIndicators(
int lineIndex,
int startCharacterIndex,
int endCharacterIndex)
{
// Get the escaped line markup.
string text = GetLineText(lineIndex, LineContexts.None);
endCharacterIndex = Math.Min(endCharacterIndex, text.Length);
string partialText = text.Substring(
startCharacterIndex, endCharacterIndex - startCharacterIndex);
// Parse through the markup and get a list of entries. If we don't
// get any out of this, return null.
List <KeywordMarkupEntry> entries = KeywordMarkupEntry.ParseText(partialText);
if (entries.Count == 0)
{
return(null);
}
// Return the list of keyword entries which are also indicators.
var indicators = new List <ILineIndicator>(entries.Count);
indicators.AddRange(entries);
return(indicators);
}
/// <summary>
/// Gets the Pango markup for a given line.
/// </summary>
/// <param name="lineIndex">The line.</param>
/// <returns></returns>
public override string GetLineMarkup(
int lineIndex,
LineContexts lineContexts)
{
// Get the escaped line markup.
string markup = base.GetLineMarkup(lineIndex, lineContexts);
// Parse through the markup and get a list of entries. We go through
// the list in reverse so we can use the character entries without
// adjusting for the text we're adding.
List <KeywordMarkupEntry> entries = KeywordMarkupEntry.ParseText(markup);
entries.Reverse();
foreach (KeywordMarkupEntry entry in entries)
{
// Insert the final span at the end.
markup = markup.Insert(entry.EndCharacterIndex, "</span>");
// Figure out the attributes.
string attributes = string.Empty;
switch (entry.Markup)
{
case KeywordMarkupType.Error:
attributes = "underline='error' underline_color='red' color='red'";
break;
case KeywordMarkupType.Warning:
attributes = "underline='error' underline_color='orange' color='orange'";
break;
}
// Add in the attributes for the start index.
markup = markup.Insert(
entry.StartCharacterIndex, "<span " + attributes + ">");
}
// Return the resulting markup.
return(markup);
}