internal async Task <CssStyleSheet> ParseStylesheetAsync(CssStyleSheet sheet, TextSource source)
{
await source.PrefetchAllAsync(CancellationToken.None).ConfigureAwait(false);
var tokenizer = new CssTokenizer(source);
var start = tokenizer.GetCurrentPosition();
var builder = new CssBuilder(tokenizer, this);
var document = sheet.GetDocument() as Document;
var tasks = new List <Task>();
var end = builder.CreateRules(sheet);
var range = new TextRange(start, end);
sheet.SourceCode = new TextView(range, source);
foreach (var rule in sheet.Rules)
{
if (rule.Type == CssRuleType.Charset)
{
continue;
}
else if (rule.Type != CssRuleType.Import)
{
break;
}
else
{
var import = (CssImportRule)rule;
tasks.Add(import.LoadStylesheetFromAsync(document));
}
}
await TaskEx.WhenAll(tasks).ConfigureAwait(false);
return(sheet);
}
public void CssParserIdentifier()
{
var teststring = "h1 { background: blue; }";
var tokenizer = new CssTokenizer(new TextSource(teststring), null);
var token = tokenizer.Get();
Assert.AreEqual(CssTokenType.Ident, token.Type);
}
public void CssTokenizerOnlyCarriageReturn()
{
var teststring = "\r";
var tokenizer = new CssTokenizer(new TextSource(teststring), null);
var token = tokenizer.Get();
Assert.AreEqual("\n", token.Data);
}
public void CssTokenizerOnlyLineFeed()
{
var teststring = "\n";
var tokenizer = new CssTokenizer(new TextSource(teststring), null);
var token = tokenizer.Get();
Assert.AreEqual("\n", token.Data);
}
public void CssParserAtRule()
{
var teststring = "@media { background: blue; }";
var tokenizer = new CssTokenizer(new TextSource(teststring), null);
var token = tokenizer.Get();
Assert.AreEqual(CssTokenType.AtKeyword, token.Type);
}
public void CssTokenizerCarriageReturnLineFeed()
{
var teststring = "\r\n";
var tokenizer = new CssTokenizer(new TextSource(teststring));
var token = tokenizer.Get();
Assert.AreEqual("\n", token.Data);
}
public void CssParserUrlSingleQuoted()
{
var url = "http://someurl";
var teststring = "url('" + url + "')";
var tokenizer = new CssTokenizer(new TextSource(teststring), null);
var token = tokenizer.Get();
Assert.AreEqual(url, token.Data);
}
public CssBuilder(CssTokenizer tokenizer, CssParser parser)
{
_tokenizer = tokenizer;
_parser = parser;
_nodes = new Stack <CssNode>();
if (parser.Options.IsStoringTrivia)
{
_nodes.Push(new CssNode());
}
}
internal ICssStyleSheet ParseStylesheet(TextSource source)
{
var sheet = new CssStyleSheet(this);
var tokenizer = new CssTokenizer(source);
var start = tokenizer.GetCurrentPosition();
var builder = new CssBuilder(tokenizer, this);
var end = builder.CreateRules(sheet);
var range = new TextRange(start, end);
sheet.SourceCode = new TextView(range, source);
return(sheet);
}
public CssBuilder(CssTokenizer tokenizer, CssParser parser)
{
_tokenizer = tokenizer;
_parser = parser;
}
public CssBuilder(CssTokenizer tokenizer, CssParser parser)
{
_tokenizer = tokenizer;
_parser = parser;
_nodes = new Stack <CssNode>();
}
/// <summary>
/// Creates a style sheet for the given response asynchronously.
/// </summary>
/// <param name="response">
/// The response with the stream representing the source of the
/// stylesheet.
/// </param>
/// <param name="options">
/// The options with the parameters for evaluating the style.
/// </param>
/// <param name="cancel">The cancellation token.</param>
/// <returns>The task resulting in the style sheet.</returns>
public async Task<IStyleSheet> ParseStylesheetAsync(IResponse response, StyleOptions options, CancellationToken cancel)
{
var context = options.Context;
var configuration = context.Configuration;
var parser = new CssParser(_options, configuration);
var url = response.Address?.Href;
var sheet = new CssStyleSheet(parser, url, options.Element) { IsDisabled = options.IsDisabled };
var source = new TextSource(response.Content);
var tokenizer = new CssTokenizer(source);
tokenizer.Error += (_, ev) => context.Fire(ev);
var builder = new CssBuilder(tokenizer, parser);
context.Fire(new CssParseEvent(sheet, completed: false));
await parser.ParseStylesheetAsync(sheet, source).ConfigureAwait(false);
context.Fire(new CssParseEvent(sheet, completed: true));
return sheet;
}
public CssParseState(CssTokenizer tokenizer, CssParser parser)
{
_tokenizer = tokenizer;
_parser = parser;
}