Transition?ParseValue(CSSValueList values)
{
CSSPrimitiveValue <Time> delay = null;
CSSPrimitiveValue <Time> duration = null;
CSSTimingValue function = null;
String property = null;
for (var i = 0; i < values.Length; i++)
{
if (function == null && (function = values[i].ToTimingFunction()) != null)
{
continue;
}
if (property == null && values[i] is CSSIdentifierValue)
{
property = ((CSSIdentifierValue)values[i]).Value;
continue;
}
if (values[i] is CSSPrimitiveValue <Time> )
{
var time = (CSSPrimitiveValue <Time>)values[i];
if (duration == null)
{
duration = time;
continue;
}
else if (delay == null)
{
delay = time;
continue;
}
}
return(null);
}
return(new Transition
{
Delay = delay != null ? delay.Value : Time.Zero,
Duration = duration != null ? duration.Value : Time.Zero,
Timing = function ?? CSSTimingValue.Ease,
Property = property ?? "all"
});
}
Animation?ParseValue(CSSValueList values)
{
CSSPrimitiveValue <Time> delay = null;
CSSPrimitiveValue <Time> duration = null;
CSSPrimitiveValue <Number> iterationCount = null;
CSSTimingValue function = null;
AnimationFillMode? fillMode = null;
AnimationDirection? direction = null;
String name = null;
for (var i = 0; i < values.Length; i++)
{
if (function == null && (function = values[i].ToTimingFunction()) != null)
{
continue;
}
if (values[i] is CSSIdentifierValue)
{
if (name == null)
{
name = ((CSSIdentifierValue)values[i]).Value;
continue;
}
if (!fillMode.HasValue && (fillMode = values[i].ToFillMode()).HasValue)
{
continue;
}
if (!direction.HasValue && (direction = values[i].ToDirection()).HasValue)
{
continue;
}
}
if (values[i] is CSSPrimitiveValue <Time> )
{
var time = (CSSPrimitiveValue <Time>)values[i];
if (duration == null)
{
duration = time;
continue;
}
else if (delay == null)
{
delay = time;
continue;
}
}
if (iterationCount == null && values[i] is CSSPrimitiveValue <Number> )
{
iterationCount = (CSSPrimitiveValue <Number>)values[i];
continue;
}
return(null);
}
return(new Animation
{
Delay = delay != null ? delay.Value : Time.Zero,
Duration = duration != null ? duration.Value : Time.Zero,
Timing = function ?? CSSTimingValue.Ease,
Name = name ?? "none",
IterationCount = iterationCount != null ? iterationCount.Value.Value : 1f,
FillMode = fillMode.HasValue ? fillMode.Value : AnimationFillMode.None,
Direction = direction.HasValue ? direction.Value : AnimationDirection.Normal
});
}
/// <summary>
/// Creates a single value from the given source.
/// </summary>
/// <param name="source">The token iterator.</param>
/// <returns>The value or NULL.</returns>
CSSValue CreateValue(IEnumerator <CssToken> source)
{
CSSValue value = null;
switch (source.Current.Type)
{
case CssTokenType.String: // 'i am a string'
value = new CSSPrimitiveValue(UnitType.String, ((CssStringToken)source.Current).Data);
break;
case CssTokenType.Url: // url('this is a valid URL')
value = new CSSPrimitiveValue(UnitType.Uri, ((CssStringToken)source.Current).Data);
break;
case CssTokenType.Ident: // ident
value = new CSSPrimitiveValue(UnitType.Ident, ((CssKeywordToken)source.Current).Data);
break;
case CssTokenType.Percentage: // 5%
value = new CSSPrimitiveValue(UnitType.Percentage, ((CssUnitToken)source.Current).Data);
break;
case CssTokenType.Dimension: // 3px
value = new CSSPrimitiveValue(((CssUnitToken)source.Current).Unit, ((CssUnitToken)source.Current).Data);
break;
case CssTokenType.Number: // 173
value = new CSSPrimitiveValue(UnitType.Number, ((CssNumberToken)source.Current).Data);
break;
case CssTokenType.Hash: // #string
HtmlColor color;
if (HtmlColor.TryFromHex(((CssKeywordToken)source.Current).Data, out color))
{
value = new CSSPrimitiveValue(color);
}
break;
case CssTokenType.Delim: // e.g. #0F3, #012345, ...
if (((CssDelimToken)source.Current).Data == '#')
{
String hash = String.Empty;
while (source.MoveNext())
{
var stop = false;
switch (source.Current.Type)
{
case CssTokenType.Number:
case CssTokenType.Dimension:
case CssTokenType.Ident:
var rest = source.Current.ToValue();
if (hash.Length + rest.Length <= 6)
{
hash += rest;
}
else
{
stop = true;
}
break;
default:
stop = true;
break;
}
if (stop || hash.Length == 6)
{
break;
}
}
if (HtmlColor.TryFromHex(hash, out color))
{
value = new CSSPrimitiveValue(color);
}
}
break;
case CssTokenType.Function: // rgba(255, 255, 20, 0.5)
value = CreateFunction(source);
break;
}
return(value);
}
/// <summary>
/// Determines if the given value represents a valid state of this property.
/// </summary>
/// <param name="value">The state that should be used.</param>
/// <returns>True if the state is valid, otherwise false.</returns>
protected override Boolean IsValid(CSSValue value)
{
if (value != CSSValue.Inherit)
{
var values = value as CSSValueList ?? new CSSValueList(value);
var image = new CSSValueList();
var position = new CSSValueList();
var size = new CSSValueList();
var repeat = new CSSValueList();
var attachment = new CSSValueList();
var origin = new CSSValueList();
var clip = new CSSValueList();
var color = new CSSPrimitiveValue<Color>(Color.Transparent);
var list = values.ToList();
for (int i = 0; i < list.Count; i++)
{
var entry = list[i];
var hasImage = false;
var hasPosition = false;
var hasRepeat = false;
var hasAttachment = false;
var hasBox = false;
var hasColor = i + 1 != list.Count;
for (int j = 0; j < entry.Length; j++)
{
if (!hasPosition && (entry[j].IsOneOf("top", "left", "center", "bottom", "right") || entry[j].AsCalc() != null))
{
hasPosition = true;
position.Add(entry[j]);
while (j + 1 < entry.Length && (entry[j + 1].IsOneOf("top", "left", "center", "bottom", "right") || entry[j + 1].AsCalc() != null))
position.Add(entry[++j]);
if (j + 1 < entry.Length && entry[j + 1] == CSSValue.Delimiter)
{
j += 2;
if (j < entry.Length && (entry[j].IsOneOf("auto", "contain", "cover") || entry[j].AsCalc() != null))
{
size.Add(entry[j]);
if (j + 1 < entry.Length && (entry[j + 1].Is("auto") || entry[j + 1].AsCalc() != null))
size.Add(entry[++j]);
}
else
return false;
}
else
size.Add(new CSSIdentifierValue("auto"));
continue;
}
if (!hasImage && entry[j].AsImage() != null)
{
hasImage = true;
image.Add(entry[j]);
}
else if (!hasRepeat && entry[j].IsOneOf("repeat-x", "repeat-y", "repeat", "space", "round", "no-repeat"))
{
hasRepeat = true;
repeat.Add(entry[j]);
if (j + 1 < entry.Length && entry[j + 1].IsOneOf("repeat", "space", "round", "no-repeat"))
repeat.Add(entry[++j]);
}
else if (!hasAttachment && entry[j].IsOneOf("local", "fixed", "scroll"))
{
hasAttachment = true;
attachment.Add(entry[j]);
}
else if (!hasBox && entry[j].ToBoxModel().HasValue)
{
hasBox = true;
origin.Add(entry[j]);
if (j + 1 < entry.Length && entry[j + 1].ToBoxModel().HasValue)
clip.Add(entry[++j]);
else
clip.Add(new CSSIdentifierValue("border-box"));
}
else
{
if (hasColor)
return false;
hasColor = true;
color = entry[j].AsColor();
if (color == null)
return false;
}
}
if (!hasImage)
image.Add(new CSSIdentifierValue("none"));
if (!hasPosition)
{
position.Add(new CSSIdentifierValue("center"));
size.Add(new CSSIdentifierValue("auto"));
}
if (!hasRepeat)
repeat.Add(new CSSIdentifierValue("repeat"));
if (!hasAttachment)
attachment.Add(new CSSIdentifierValue("scroll"));
if (!hasBox)
{
origin.Add(new CSSIdentifierValue("border-box"));
clip.Add(new CSSIdentifierValue("border-box"));
}
if (i + 1 < list.Count)
{
image.Add(CSSValue.Separator);
position.Add(CSSValue.Separator);
size.Add(CSSValue.Separator);
repeat.Add(CSSValue.Separator);
attachment.Add(CSSValue.Separator);
origin.Add(CSSValue.Separator);
clip.Add(CSSValue.Separator);
}
}
_image.Value = image;
_position.Value = position;
_repeat.Value = repeat;
_attachment.Value = attachment;
_origin.Value = origin;
_size.Value = size;
_clip.Value = clip;
_color.Value = color;
}
return true;
}
protected override Boolean IsValid(CSSValue value)
{
if (value != CSSValue.Inherit)
{
var values = value as CSSValueList ?? new CSSValueList(value);
var image = new CSSValueList();
var position = new CSSValueList();
var size = new CSSValueList();
var repeat = new CSSValueList();
var attachment = new CSSValueList();
var origin = new CSSValueList();
var clip = new CSSValueList();
var color = new CSSPrimitiveValue <Color>(AngleSharp.DOM.Color.Transparent);
var list = values.ToList();
for (int i = 0; i < list.Count; i++)
{
var entry = list[i];
var hasImage = false;
var hasPosition = false;
var hasRepeat = false;
var hasAttachment = false;
var hasBox = false;
var hasColor = i + 1 != list.Count;
for (int j = 0; j < entry.Length; j++)
{
if (!hasPosition && (entry[j].IsOneOf("top", "left", "center", "bottom", "right") || entry[j].AsCalc() != null))
{
hasPosition = true;
position.Add(entry[j]);
while (j + 1 < entry.Length && (entry[j + 1].IsOneOf("top", "left", "center", "bottom", "right") || entry[j + 1].AsCalc() != null))
{
position.Add(entry[++j]);
}
if (j + 1 < entry.Length && entry[j + 1] == CSSValue.Delimiter)
{
j += 2;
if (j < entry.Length && (entry[j].IsOneOf("auto", "contain", "cover") || entry[j].AsCalc() != null))
{
size.Add(entry[j]);
if (j + 1 < entry.Length && (entry[j + 1].Is("auto") || entry[j + 1].AsCalc() != null))
{
size.Add(entry[++j]);
}
}
else
{
return(false);
}
}
else
{
size.Add(new CSSIdentifierValue("auto"));
}
continue;
}
if (!hasImage && entry[j].AsImage() != null)
{
hasImage = true;
image.Add(entry[j]);
}
else if (!hasRepeat && entry[j].IsOneOf("repeat-x", "repeat-y", "repeat", "space", "round", "no-repeat"))
{
hasRepeat = true;
repeat.Add(entry[j]);
if (j + 1 < entry.Length && entry[j + 1].IsOneOf("repeat", "space", "round", "no-repeat"))
{
repeat.Add(entry[++j]);
}
}
else if (!hasAttachment && entry[j].IsOneOf("local", "fixed", "scroll"))
{
hasAttachment = true;
attachment.Add(entry[j]);
}
else if (!hasBox && entry[j].ToBoxModel().HasValue)
{
hasBox = true;
origin.Add(entry[j]);
if (j + 1 < entry.Length && entry[j + 1].ToBoxModel().HasValue)
{
clip.Add(entry[++j]);
}
else
{
clip.Add(new CSSIdentifierValue("border-box"));
}
}
else
{
if (hasColor)
{
return(false);
}
hasColor = true;
color = entry[j].AsColor();
if (color == null)
{
return(false);
}
}
}
if (!hasImage)
{
image.Add(new CSSIdentifierValue("none"));
}
if (!hasPosition)
{
position.Add(new CSSIdentifierValue("center"));
size.Add(new CSSIdentifierValue("auto"));
}
if (!hasRepeat)
{
repeat.Add(new CSSIdentifierValue("repeat"));
}
if (!hasAttachment)
{
attachment.Add(new CSSIdentifierValue("scroll"));
}
if (!hasBox)
{
origin.Add(new CSSIdentifierValue("border-box"));
clip.Add(new CSSIdentifierValue("border-box"));
}
if (i + 1 < list.Count)
{
image.Add(CSSValue.Separator);
position.Add(CSSValue.Separator);
size.Add(CSSValue.Separator);
repeat.Add(CSSValue.Separator);
attachment.Add(CSSValue.Separator);
origin.Add(CSSValue.Separator);
clip.Add(CSSValue.Separator);
}
}
_image.Value = image;
_position.Value = position;
_repeat.Value = repeat;
_attachment.Value = attachment;
_origin.Value = origin;
_size.Value = size;
_clip.Value = clip;
_color.Value = color;
}
return(true);
}
