protected static DjangoVariable[] ParseVariables(string[] words, int wordStart, int maxVars = Int32.MaxValue)
{
List <DjangoVariable> variables = new List <DjangoVariable>();
foreach (var word in words)
{
bool hasNewline = false;
if (word.Contains('\r') || word.Contains('\n'))
{
hasNewline = true;
if (word.Trim().Length == 0)
{
break;
}
}
if (!String.IsNullOrEmpty(word))
{
variables.Add(DjangoVariable.Parse(word, wordStart));
if (variables.Count == maxVars)
{
break;
}
}
if (hasNewline)
{
break;
}
wordStart += word.Length + 1;
}
return(variables.ToArray());
}
public DjangoForBlock(BlockParseInfo parseInfo, int inStart, DjangoVariable variable, int argsEnd, int reversedStart, Tuple<string, int>[] definedVars)
: base(parseInfo) {
InStart = inStart;
Variable = variable;
ArgsEnd = argsEnd;
ReversedStart = reversedStart;
_definedVars = definedVars;
}
/// <summary>
/// Parses the text and returns a DjangoBlock. Returns null if the block is empty
/// or consists entirely of whitespace.
/// </summary>
public static DjangoBlock Parse(string text, bool trim = false)
{
int start = 0;
if (text.StartsWith("{%"))
{
text = DjangoVariable.GetTrimmedFilterText(text, ref start);
if (text == null)
{
return(null);
}
}
int firstChar = 0;
for (int i = 0; i < text.Length; i++)
{
if (text[i] != ' ')
{
firstChar = i;
break;
}
}
int length = 0;
for (int i = firstChar; i < text.Length && text[i] != ' '; i++, length++)
{
;
}
if (length > 0)
{
string blockCmd = text.Substring(firstChar, length);
if (Char.IsLetterOrDigit(blockCmd[0]))
{
string args = text.Substring(firstChar + length, text.Length - (firstChar + length));
if (trim)
{
args = args.TrimEnd();
}
Func <BlockParseInfo, DjangoBlock> parser;
if (!_parsers.TryGetValue(blockCmd, out parser))
{
parser = DjangoUnknownBlock.Parse;
}
return(parser(new BlockParseInfo(blockCmd, args, firstChar + start)));
}
}
return(null);
}
public static DjangoBlock Parse(BlockParseInfo parseInfo) {
int start = 0;
for (int i = 0; i < parseInfo.Args.Length && parseInfo.Args[i] == ' '; i++, start++) {
}
var variable = DjangoVariable.Parse(
"var|" + parseInfo.Args.Substring(start),
parseInfo.Start + start + parseInfo.Command.Length
);
return new DjangoFilterBlock(parseInfo, variable);
}
protected void ClassifyTemplateBody(ITextSnapshot snapshot, List <ClassificationSpan> spans, TemplateRegion region, int prefixLength, int suffixLength)
{
switch (region.Kind)
{
case TemplateTokenKind.Comment:
spans.Add(
new ClassificationSpan(
new SnapshotSpan(
snapshot,
new Span(region.Start + prefixLength, region.Text.Length - (prefixLength + suffixLength))
),
_classifierProvider._commentClassType
)
);
break;
case TemplateTokenKind.Variable:
var filterInfo = DjangoVariable.Parse(region.Text);
if (filterInfo != null)
{
foreach (var curSpan in filterInfo.GetSpans())
{
spans.Add(ToClassificationSpan(curSpan, snapshot, region.Start));
}
}
break;
case TemplateTokenKind.Block:
var blockInfo = region.Block ?? DjangoBlock.Parse(region.Text);
if (blockInfo != null)
{
foreach (var curSpan in blockInfo.GetSpans())
{
spans.Add(ToClassificationSpan(curSpan, snapshot, region.Start));
}
}
else if (region.Text.Length > (prefixLength + suffixLength)) // unterminated block at end of file
{
spans.Add(
new ClassificationSpan(
new SnapshotSpan(
snapshot,
new Span(region.Start + prefixLength, region.Text.Length - (prefixLength + suffixLength))
),
_classifierProvider._classType
)
);
}
break;
}
}
protected override void Reparse(string text)
{
Variable = DjangoVariable.Parse(text);
}
public static DjangoForBlock Parse(BlockParseInfo parseInfo)
{
var words = parseInfo.Args.Split(' ');
int inStart = -1;
int inOffset = 0, inIndex = -1;
var definitions = new List <Tuple <string, int> >();
for (int i = 0; i < words.Length; i++)
{
var word = words[i];
if (word == "in")
{
inStart = inOffset + parseInfo.Start + parseInfo.Command.Length;
inIndex = i;
break;
}
else if (words[i].IndexOfAny(NewLines) != -1)
{
// unterminated tag
break;
}
if (!String.IsNullOrEmpty(word))
{
definitions.Add(new Tuple <string, int>(word, inOffset + parseInfo.Start + parseInfo.Command.Length));
}
inOffset += words[i].Length + 1;
}
// parse the arguments...
int reversedStart = -1;
DjangoVariable variable = null;
int argsEnd = -1;
if (inIndex != -1)
{
string filterText = "";
argsEnd = inStart + "in".Length + 1;
for (int i = inIndex + 1; i < words.Length; i++)
{
int nlStart = words[i].IndexOfAny(NewLines);
string trimmed = words[i];
if (nlStart != -1)
{
trimmed = words[i].Substring(0, nlStart);
}
if (i != inIndex + 1 && trimmed == words[i]) // if we trimmed we don't have an extra space
{
filterText += " ";
argsEnd += 1;
}
if (trimmed == "reversed")
{
reversedStart = argsEnd;
break;
}
filterText += trimmed;
argsEnd += trimmed.Length;
if (trimmed != words[i])
{
// unterminated tag
break;
}
}
var trimmedFilter = filterText.TrimStart(' ');
variable = DjangoVariable.Parse(trimmedFilter,
inStart + "in".Length + 1 + filterText.Length - trimmedFilter.Length);
}
return(new DjangoForBlock(parseInfo, inStart, variable, argsEnd, reversedStart, definitions.ToArray()));
}
public DjangoFilterBlock(BlockParseInfo parseInfo, DjangoVariable variable)
: base(parseInfo)
{
_variable = variable;
}