public static StyleSheet Parse(TextReader reader, CssContext context = null)
{
var sheet = new StyleSheet(context ?? new CssContext());
var rules = new List<CssRule>();
IList<Browser> browsers = null;
using (var parser = new CssParser(reader))
{
foreach (var node in parser.ReadNodes())
{
if (node.Kind == NodeKind.Mixin)
{
var mixin = (MixinNode)node;
sheet.Context.Mixins.Add(mixin.Name, mixin);
}
else if (node.Kind == NodeKind.Directive)
{
var directive = (CssDirective)node;
if (directive.Name == "support")
{
var parts = directive.Value.Split(Seperators.Space); // SpaceArray...
BrowserType browserType;
if (Enum.TryParse(parts[0].Trim(), true, out browserType))
{
if (browsers == null)
{
browsers = new List<Browser>();
}
var browserVersion = float.Parse(parts[parts.Length - 1].Trim(' ', '+'));
browsers.Add(new Browser(browserType, browserVersion));
}
}
}
else
{
sheet.AddChild(node);
}
}
if (browsers != null)
{
sheet.Context.SetCompatibility(browsers.ToArray());
}
}
return sheet;
}
public void WriteRoot(StyleSheet sheet)
{
importCount++;
if (importCount > 200) throw new Exception("Exceded importCount of 200");
var i = 0;
foreach (var node in sheet.Children)
{
if (node.Kind == NodeKind.If)
{
EvaluateIf((IfBlock)node);
continue;
}
if (node.Kind == NodeKind.Comment)
{
if (i != 0) writer.WriteLine();
i++;
WriteComment((CssComment)node);
continue;
}
if (node.Kind == NodeKind.Assignment)
{
var variable = (CssAssignment)node;
scope[variable.Name] = variable.Value;
continue;
}
var rule = node as CssRule;
if (rule == null) continue;
if (i != 0) writer.WriteLine();
i++;
if (rule.Type == RuleType.Import)
{
var importRule = (ImportRule)rule;
if (!importRule.Url.IsPath || resolver == null)
{
WriteImportRule(importRule);
}
else
{
InlineImport(importRule, sheet);
}
}
else
{
WriteRule(rule);
}
}
}
public void InlineImport(ImportRule importRule, StyleSheet sheet)
{
// var relativePath = importRule.Url;
var absolutePath = importRule.Url.GetAbsolutePath(resolver.ScopedPath);
if (absolutePath[0] == '/')
{
absolutePath = absolutePath.TrimStart(Seperators.ForwardSlash);
}
// Assume to be scss if there is no extension
if (!absolutePath.Contains('.'))
{
absolutePath += ".scss";
}
writer.WriteLine();
writer.WriteLine("/* " + absolutePath + " */");
var stream = resolver.Open(absolutePath);
if (stream == null)
{
writer.WriteLine("/* NOT FOUND */");
return;
}
if (absolutePath.EndsWith(".scss"))
{
try
{
var css = StyleSheet.Parse(stream, context);
WriteRoot(css);
}
catch (SyntaxException ex)
{
writer.WriteLine("body, html { background-color: red !important; }");
writer.WriteLine("body * { display: none; }");
writer.WriteLine($"/* --- Parse Error in '{absolutePath}' : {ex.Message} ");
if (ex.Lines != null)
{
foreach (var line in ex.Lines)
{
writer.Write(line.Number.ToString().PadLeft(4)); // 1
writer.Write(". ");
if (line.Number == ex.Location.Line)
{
writer.Write("* ");
}
writer.WriteLine(line.Text);
}
}
writer.Write("*/");
return;
}
}
else
{
// Copy the file line by line...
using (var reader = new StreamReader(stream))
{
string line;
while ((line = reader.ReadLine()) != null)
{
writer.WriteLine(line);
}
}
}
}
