public static List <PageFragment> ParseScript(this ScriptContext context, ReadOnlyMemory <char> text)
{
var to = new List <PageFragment>();
ScriptLanguage scriptLanguage = null;
ReadOnlyMemory <char> modifiers = default;
ReadOnlyMemory <char> prevBlock = default;
int startBlockPos = -1;
var cursorPos = 0;
var lastBlockPos = 0;
const int delim = 3; // '```'.length
while (text.TryReadLine(out var line, ref cursorPos))
{
var lineLength = line.Length;
line = line.AdvancePastWhitespace();
var leftIndent = lineLength - line.Length;
if (line.StartsWith("```"))
{
if (startBlockPos >= 0 && line.Slice(delim).AdvancePastWhitespace().IsEmpty) //is end block
{
var templateFragments = ScriptTemplate.Language.Parse(context, prevBlock);
to.AddRange(templateFragments);
var blockBody = text.ToLineStart(cursorPos, lineLength, startBlockPos);
var blockFragments = scriptLanguage.Parse(context, blockBody, modifiers);
to.AddRange(blockFragments);
prevBlock = default;
startBlockPos = -1;
scriptLanguage = null;
modifiers = null;
lastBlockPos = cursorPos;
continue;
}
if (line.SafeGetChar(delim + 1).IsValidVarNameChar())
{
line = line.Slice(delim).ParseVarName(out var blockNameSpan);
var blockName = blockNameSpan.ToString();
scriptLanguage = context.GetScriptLanguage(blockName);
if (scriptLanguage == null)
{
continue;
}
modifiers = line.AdvancePastChar('|');
prevBlock = text.ToPreviousLine(cursorPos, lineLength);
startBlockPos = cursorPos;
}
}
}
var remainingBlock = text.Slice(lastBlockPos);
if (!remainingBlock.IsEmpty)
{
var templateFragments = ScriptTemplate.Language.Parse(context, remainingBlock);
to.AddRange(templateFragments);
}
return(to);
}