private SpecifiedDimensionSummary ProcessAnyBorderChanges(StylePropertyValue property, SpecifiedDimensionSummary dimensionsSummary)
{
if (property == null)
{
throw new ArgumentNullException("property");
}
if (dimensionsSummary == null)
{
throw new ArgumentNullException("dimensionsSummary");
}
// Address the "border:none" case, this is the only property / value combination that can affect width without specifying dimensions
if (property.Property.Value.Equals("border", StringComparison.InvariantCultureIgnoreCase) &&
property.ValueSegments.Any(v => v.Equals("none", StringComparison.InvariantCultureIgnoreCase)))
{
return(new SpecifiedDimensionSummary(null, null, null, null));
}
// Border widths can be specified with {value}{unit} or by a predefined width string (eg. "thin"), to take this complication out of the
// picture any pre-defined width strings are replaced with "4px" before trying to extract measurements values from the property's value
var propertyWithPreDefinedWidthReplaced = new StylePropertyValue(
property.Property,
property.ValueSegments.Select(s => ValueIsPreDefinedWidthValue(s) ? "4px" : s),
property.SourceLineIndex
);
var measurements = propertyWithPreDefinedWidthReplaced.GetValueSectionsThatAreMeasurements().ToArray();
if (!measurements.Any())
{
return(dimensionsSummary);
}
if (property.Property.Value.Equals("border-top", StringComparison.InvariantCultureIgnoreCase) ||
property.Property.Value.Equals("border-top-width", StringComparison.InvariantCultureIgnoreCase))
{
return(new SpecifiedDimensionSummary(
(measurements.First().Value == 0) ? null : property,
dimensionsSummary.PropertyWithNonZeroRightValueIfAny,
dimensionsSummary.PropertyWithNonZeroBottomValueIfAny,
dimensionsSummary.PropertyWithNonZeroLeftValueIfAny
));
}
else if (property.Property.Value.Equals("border-right", StringComparison.InvariantCultureIgnoreCase) ||
property.Property.Value.Equals("border-right-width", StringComparison.InvariantCultureIgnoreCase))
{
return(new SpecifiedDimensionSummary(
dimensionsSummary.PropertyWithNonZeroTopValueIfAny,
(measurements.First().Value == 0) ? null : property,
dimensionsSummary.PropertyWithNonZeroBottomValueIfAny,
dimensionsSummary.PropertyWithNonZeroLeftValueIfAny
));
}
else if (property.Property.Value.Equals("border-bottom", StringComparison.InvariantCultureIgnoreCase) ||
property.Property.Value.Equals("border-bottom-width", StringComparison.InvariantCultureIgnoreCase))
{
return(new SpecifiedDimensionSummary(
dimensionsSummary.PropertyWithNonZeroTopValueIfAny,
dimensionsSummary.PropertyWithNonZeroRightValueIfAny,
(measurements.First().Value == 0) ? null : property,
dimensionsSummary.PropertyWithNonZeroLeftValueIfAny
));
}
else if (property.Property.Value.Equals("border-left", StringComparison.InvariantCultureIgnoreCase) ||
property.Property.Value.Equals("border-left-width", StringComparison.InvariantCultureIgnoreCase))
{
return(new SpecifiedDimensionSummary(
dimensionsSummary.PropertyWithNonZeroTopValueIfAny,
dimensionsSummary.PropertyWithNonZeroRightValueIfAny,
dimensionsSummary.PropertyWithNonZeroBottomValueIfAny,
(measurements.First().Value == 0) ? null : property
));
}
else if (property.Property.Value.Equals("border", StringComparison.InvariantCultureIgnoreCase))
{
// The "border" property can only specify a single dimension which applies to all sides (unlike "border-width", see below)
return(new SpecifiedDimensionSummary(
(measurements.First().Value == 0) ? null : property,
(measurements.First().Value == 0) ? null : property,
(measurements.First().Value == 0) ? null : property,
(measurements.First().Value == 0) ? null : property
));
}
else if (!property.Property.Value.Equals("border-width", StringComparison.InvariantCultureIgnoreCase))
{
return(dimensionsSummary);
}
// The "border-width" property is like "padding" and may have between and and four dimensions
var topValue = measurements[0].Value;
var rightValue = (measurements.Length > 1) ? measurements[1].Value : topValue;
var bottomValue = (measurements.Length > 2) ? measurements[2].Value : topValue;
var leftValue = (measurements.Length > 3) ? measurements[3].Value : rightValue;
return(new SpecifiedDimensionSummary(
(topValue == 0) ? null : property,
(rightValue == 0) ? null : property,
(bottomValue == 0) ? null : property,
(leftValue == 0) ? null : property
));
}
public IEnumerable <BrokenRuleEncounteredException> GetAnyBrokenRules(IEnumerable <ICSSFragment> fragments)
{
if (fragments == null)
{
throw new ArgumentNullException("fragments");
}
foreach (var fragment in fragments)
{
var containerFragment = fragment as ContainerFragment;
if (containerFragment == null)
{
continue;
}
// Try to determine whether a width has been explicitly set
// - If there are multiple then the last one will be applied by the browser, so consider that (if any have "!important" specified then they
// may override, so the styles are ordered so that those without "!important" appear first and then those that do, it is the last entry
// of this set that we want)
var propertyValues = containerFragment.ChildFragments
.Select((f, i) => new { Fragment = f, Index = i })
.Where(f => f.Fragment is StylePropertyValue)
.Select(f => new { PropertyValueFragment = (StylePropertyValue)f.Fragment, Index = f.Index })
.OrderBy(f => f.PropertyValueFragment.ValueSegments.Any(v => v.Equals("!important", StringComparison.InvariantCultureIgnoreCase)) ? 1 : 0)
.ThenBy(f => f.Index)
.Select(f => f.PropertyValueFragment);
var lastWidthPropertyIfAny = propertyValues.LastOrDefault(p => p.Property.Value.Equals("width", StringComparison.InvariantCultureIgnoreCase));
var isWidthDefined = (
(lastWidthPropertyIfAny != null) &&
!!lastWidthPropertyIfAny.GetValueSectionsThatAreMeasurements().Any()
);
// If a width has been explicitly set then ensure that no properties are present that violate this rule (2014-08-28: Unless "border-box"
// has been set for the "box-sizing" property and the confirmity setting has been enabled which allows this). Requiring the "border-box"
// style to appear within any block that requires it means it's very easy to tell at a glance whether the block requires a modern browser
// (in this case, that means *not* IE7, since IE7 doesn't support "box-sizing: border-box").
if (isWidthDefined)
{
var lastBorderBoxPropertyIfAny = propertyValues.LastOrDefault(p => p.Property.Value.Equals("box-sizing", StringComparison.InvariantCultureIgnoreCase));
bool isBorderBoxSizingSpecified;
if (lastBorderBoxPropertyIfAny == null)
{
isBorderBoxSizingSpecified = false;
}
else
{
var concatenatedPropertyValue = string.Join(", ", lastBorderBoxPropertyIfAny.ValueSegments);
isBorderBoxSizingSpecified =
concatenatedPropertyValue.Equals("border-box", StringComparison.InvariantCultureIgnoreCase) ||
concatenatedPropertyValue.Equals("border-box !important", StringComparison.InvariantCultureIgnoreCase);
}
if (!isBorderBoxSizingSpecified || ((_conformity & ConformityOptions.IgnoreRuleIfBorderBoxSizingRulePresent) == 0))
{
var paddingDimensions = new SpecifiedDimensionSummary(null, null, null, null);
var borderDimensions = new SpecifiedDimensionSummary(null, null, null, null);
{
foreach (var property in propertyValues)
{
paddingDimensions = ProcessAnyPaddingChanges(property, paddingDimensions);
borderDimensions = ProcessAnyBorderChanges(property, paddingDimensions);
}
}
// Check whether any property has been identified as setting a border or padding dimension
// - Unless ConformityOptions.Strict behaviour is enabled, ignore the vertial (Top/Bottom) values, the horizontal
// ones are of greater importance in relation to width
var invalidProperty =
((_conformity == ConformityOptions.Strict) ? paddingDimensions.PropertyWithNonZeroTopValueIfAny : null) ??
paddingDimensions.PropertyWithNonZeroRightValueIfAny ??
((_conformity == ConformityOptions.Strict) ? paddingDimensions.PropertyWithNonZeroBottomValueIfAny : null) ??
paddingDimensions.PropertyWithNonZeroLeftValueIfAny ??
((_conformity == ConformityOptions.Strict) ? borderDimensions.PropertyWithNonZeroTopValueIfAny : null) ??
borderDimensions.PropertyWithNonZeroRightValueIfAny ??
((_conformity == ConformityOptions.Strict) ? borderDimensions.PropertyWithNonZeroBottomValueIfAny : null) ??
borderDimensions.PropertyWithNonZeroLeftValueIfAny;
if (invalidProperty != null)
{
yield return(new BorderAndPaddingMayNotBeCombinedWithWidthException(invalidProperty));
}
}
}
foreach (var brokenRule in GetAnyBrokenRules(containerFragment.ChildFragments))
{
yield return(brokenRule);
}
}
}
private SpecifiedDimensionSummary ProcessAnyPaddingChanges(StylePropertyValue property, SpecifiedDimensionSummary dimensionsSummary)
{
if (property == null)
{
throw new ArgumentNullException("property");
}
if (dimensionsSummary == null)
{
throw new ArgumentNullException("dimensionsSummary");
}
var measurements = property.GetValueSectionsThatAreMeasurements().ToArray();
if (!measurements.Any())
{
return(dimensionsSummary);
}
if (property.Property.Value.Equals("padding-top", StringComparison.InvariantCultureIgnoreCase))
{
return(new SpecifiedDimensionSummary(
(measurements.First().Value == 0) ? null : property,
dimensionsSummary.PropertyWithNonZeroRightValueIfAny,
dimensionsSummary.PropertyWithNonZeroBottomValueIfAny,
dimensionsSummary.PropertyWithNonZeroLeftValueIfAny
));
}
else if (property.Property.Value.Equals("padding-right", StringComparison.InvariantCultureIgnoreCase))
{
return(new SpecifiedDimensionSummary(
dimensionsSummary.PropertyWithNonZeroTopValueIfAny,
(measurements.First().Value == 0) ? null : property,
dimensionsSummary.PropertyWithNonZeroBottomValueIfAny,
dimensionsSummary.PropertyWithNonZeroLeftValueIfAny
));
}
else if (property.Property.Value.Equals("padding-bottom", StringComparison.InvariantCultureIgnoreCase))
{
return(new SpecifiedDimensionSummary(
dimensionsSummary.PropertyWithNonZeroTopValueIfAny,
dimensionsSummary.PropertyWithNonZeroRightValueIfAny,
(measurements.First().Value == 0) ? null : property,
dimensionsSummary.PropertyWithNonZeroLeftValueIfAny
));
}
else if (property.Property.Value.Equals("padding-left", StringComparison.InvariantCultureIgnoreCase))
{
return(new SpecifiedDimensionSummary(
dimensionsSummary.PropertyWithNonZeroTopValueIfAny,
dimensionsSummary.PropertyWithNonZeroRightValueIfAny,
dimensionsSummary.PropertyWithNonZeroBottomValueIfAny,
(measurements.First().Value == 0) ? null : property
));
}
else if (!property.Property.Value.Equals("padding", StringComparison.InvariantCultureIgnoreCase))
{
return(dimensionsSummary);
}
// The "padding" property may have one or four dimensions specified
// - If only one then all sides have that value
// - If two then the settings are for top/bottom and left/right
// - If three then the settingss are for top, left/right, bottom
// - If four then the settings are for top, right, bottom, left
var topValue = measurements[0].Value;
var rightValue = (measurements.Length > 1) ? measurements[1].Value : topValue;
var bottomValue = (measurements.Length > 2) ? measurements[2].Value : topValue;
var leftValue = (measurements.Length > 3) ? measurements[3].Value : rightValue;
return(new SpecifiedDimensionSummary(
(topValue == 0) ? null : property,
(rightValue == 0) ? null : property,
(bottomValue == 0) ? null : property,
(leftValue == 0) ? null : property
));
}
