public static void FontStyleConverter(ref BaseStyle style, Declaration declaration)
{
string flag;
try
{
flag = declaration.Expression.Terms.First().Value;
}
catch (InvalidOperationException exception)
{
throw new FormatException("Style 'font-style' has incorrect value. [font-style: normal | italic]", exception);
}
catch (ArgumentNullException exception)
{
throw new FormatException("Style 'font-style' has incorrect value. [font-style: normal | italic]", exception);
}
catch (NullReferenceException exception)
{
throw new FormatException("Style 'font-style' has incorrect value. [font-style: normal | italic]", exception);
}
switch (flag)
{
case "normal":
style.IsItalic = false;
break;
case "italic":
style.IsItalic = true;
break;
default:
throw new FormatException("Style 'font-style' has incorrect value. [font-style: normal | italic]");
}
}
public static void FontFamilyConverter(ref BaseStyle style, Declaration declaration)
{
var family = declaration.Expression.Terms.First().Value;
new Font(family, 10);
style.Font = family;
}
public static void BorderTopConverter(ref BaseStyle style, Declaration declaration)
{
var width = ushort.Parse(declaration.Expression.Terms.ElementAt(0).Value);
var borderStyle = EnumUtils.ParseBorderStyle(declaration.Expression.Terms.ElementAt(1).Value);
var color = declaration.Expression.Terms.ElementAt(2).ToColor();
style.BorderTopColor = color;
style.BorderTopStyle = borderStyle;
style.BorderTopWidth = width;
}
static IEnumerable<StyleProperty> CreateStyleProperties(Declaration declaration)
{
var properties = new List<StyleProperty> ();
foreach(var term in declaration.Expression.Terms) {
var property = StylePropertyFactory.Create(declaration.Name.ToLower());
if (property != null)
{
property.SetValue(term.Value);
properties.Add(property);
}
}
return properties;
}
public ScopedDeclaration(Declaration decleration)
{
Decleration = decleration;
Scope = new ScopedDeclarationRank(decleration.Important);
}
public ScopedDeclaration(Declaration decleration, Selector selector)
{
Decleration = decleration;
Scope = new ScopedDeclarationRank(selector, decleration.Important);
}
public static void FontSizeConverter(ref BaseStyle style, Declaration declaration)
{
var value = declaration.Expression.Terms.First().Value;
style.FontSize = ushort.Parse(value);
}
public static void ColorConverter(ref BaseStyle style, Declaration declaration)
{
style.Color = declaration.Expression.Terms.First().ToColor();
}
public static void WidthConverter(ref BaseStyle style, Declaration declaration)
{
style.Width = ushort.Parse(declaration.Expression.Terms.First().Value);
}
public static void VAlignConverter(ref BaseStyle style, Declaration declaration)
{
style.VAlign = EnumUtils.ParseVAlign(declaration.Expression.Terms.First().Value);
}
public static void TextDecorationConverter(ref BaseStyle style, Declaration declaration)
{
style.IsLineThrough = false;
style.IsOverline = false;
style.IsUnderline = false;
var flags = declaration.Expression.Terms.Select(flag => flag.Value).ToArray();
if (!flags.Any())
{
throw new FormatException("Style 'text-decoration' has incorrect value. [text-decoration: [line-through | overline | underline] | none]");
}
if (flags.Contains("none"))
{
return;
}
if (flags.Contains("line-through"))
{
style.IsLineThrough = true;
}
if (flags.Contains("overline"))
{
style.IsOverline = true;
}
if (flags.Contains("underline"))
{
style.IsUnderline = true;
}
}
public static void BackgroundColorConverter(ref BaseStyle style, Declaration declaration)
{
var backgroundColor = declaration.Expression.Terms.First().ToColor();
style.BackgroundColor = backgroundColor;
}
public void ReplaceCssImagesWithSprite(CombinatorResource resource)
{
Func<RuleSet, Term, bool> noSprite =
(ruleSet, url) =>
{
if (url.Value.Contains("no-sprite")
|| ruleSet.Selectors.Any(selector => selector.SimpleSelectors.Any(simpleSelector => simpleSelector.Class == "no-sprite"))) return true;
// Images with a background position are not suitable for sprite generation if they aren't top-left
if (ruleSet.Declarations.Any(declaration => declaration.Name == "background-position"
&& (declaration.Expression.Terms.Count() != 2
|| !declaration.Expression.Terms.Any(term => term.Value == "top")
|| !declaration.Expression.Terms.Any(term => term.Value == "left")))) return true;
// Images with a background size are not suitable for sprite generation
if (ruleSet.Declarations.Any(declaration => declaration.Name == "background-size")) return true;
// Images with a background repeat are not suitable for sprite generation
if (ruleSet.Declarations.Any(declaration => declaration.Name == "background-repeat"
&& (declaration.Expression.Terms.Count() != 1 || declaration.Expression.Terms.First().Value != "no-repeat"))) return true;
var backgroundTerms =
ruleSet.Declarations
.Where(declaration => declaration.Name == "background")
.SelectMany(declaration => declaration.Expression.Terms);
// Sized backgrounds are not suitable either
// LineHeightTerm is filled with a value when if in the shorthand background declaration there's the background size specified, e.g.:
// background: url(url-to-img) 300px 400px / 500px 600px no-repeat;
// Now there will be a term for 400px, having LineHeightTerm specified for 500px.
if (backgroundTerms.Any(term => term.LineHeightTerm != null)) return true;
var backgroundTermValues = backgroundTerms.Select(term => term.Value);
// Positioned backgrounds are not suitable either, except top-left ones
if (backgroundTerms
.Any(term =>
term.Value == "center" ||
term.Value == "top" ||
term.Value == "right" ||
term.Value == "bottom" ||
term.Unit != null) &&
!(backgroundTermValues.Contains("top") && backgroundTermValues.Contains("left"))) return true;
if (backgroundTermValues.Any(value => value == "repeat-x" || value == "repeat-y" || value == "repeat")) return true;
return false;
};
var images = new Dictionary<string, CssImage>();
var stylesheet = new StylesheetParser().Parse(resource.Content);
ProcessImageUrls(
resource,
stylesheet,
(ruleSet, urlTerm) =>
{
var url = urlTerm.Value;
if (noSprite(ruleSet, urlTerm)) return;
var imageContent = _resourceFileService.GetImageContent(InlineUriFactory(resource, url), 5000);
if (imageContent != null)
{
images[url] = new CssImage { Content = imageContent };
}
});
if (images.Count == 0) return;
_cacheFileService.WriteSpriteStream(
resource.Content.GetHashCode() + ".jpg",
(stream, publicUrl) =>
{
using (var sprite = new Sprite(images.Values.Select(image => image.Content)))
{
var imageEnumerator = images.Values.GetEnumerator();
foreach (var backgroundImage in sprite.Generate(stream, ImageFormat.Jpeg))
{
imageEnumerator.MoveNext();
imageEnumerator.Current.BackgroundImage = backgroundImage;
imageEnumerator.Current.BackgroundImage.Url = InlineUriFactory(resource, publicUrl);
}
}
});
ProcessImageUrls(
resource,
stylesheet,
(ruleSet, urlTerm) =>
{
var url = urlTerm.Value;
if (images.ContainsKey(url))
{
var backgroundImage = images[url].BackgroundImage;
var imageDeclaration = new Declaration
{
Name = "background-image",
Expression = new Expression
{
Terms = new List<Term>
{
new Term { Type = TermType.Url, Value = backgroundImage.Url.ToProtocolRelative() }
}
}
};
ruleSet.Declarations.Add(imageDeclaration);
var bgPosition = backgroundImage.Position;
var positionDeclaration = new Declaration
{
Name = "background-position",
Expression = new Expression
{
Terms = new List<Term>
{
new Term { Type = TermType.Number, Value = bgPosition.X.ToString(), Unit = Unit.Px },
new Term { Type = TermType.Number, Value = bgPosition.Y.ToString(), Unit = Unit.Px }
}
}
};
ruleSet.Declarations.Add(positionDeclaration);
}
});
resource.Content = stylesheet.ToString();
}
void declaration(out Declaration dec)
{
dec = new Declaration();
Expression expression;
string ident = "";
if (la.kind == 32) {
Get();
dec.Name += "*";
}
if (la.kind == 24) {
Get();
dec.Name += "-";
}
identity(out ident);
dec.Name += ident;
while (la.kind == 4) {
Get();
}
Expect(44);
while (la.kind == 4) {
Get();
}
expr(out expression);
dec.Expression = expression;
while (la.kind == 4) {
Get();
}
if (la.kind == 45) {
Get();
while (la.kind == 4) {
Get();
}
Expect(46);
dec.Important = true;
while (la.kind == 4) {
Get();
}
}
}
