private void UpdateStyles(VisualElement element, int depth)
{
if (element.IsDirty(ChangeType.Styles) || element.IsDirty(ChangeType.StylesPath))
{
VisualContainer visualContainer = element as VisualContainer;
int count = this.m_Matchers.Count;
if (visualContainer != null && visualContainer.styleSheets != null)
{
this.AddMatchersFromSheet(visualContainer.styleSheets);
}
string fullTypeName = element.fullTypeName;
long num = (long)fullTypeName.GetHashCode();
num = (num * 397L ^ (long)this.currentPixelsPerPoint.GetHashCode());
this.m_MatchedRules.Clear();
int count2 = this.m_Matchers.Count;
for (int i = 0; i < count2; i++)
{
RuleMatcher ruleMatcher = this.m_Matchers[i];
if (ruleMatcher.depth >= depth && StyleContext.Match(element, ref ruleMatcher))
{
StyleSelector[] selectors = ruleMatcher.complexSelector.selectors;
int num2 = ruleMatcher.simpleSelectorIndex + 1;
int num3 = selectors.Length;
if (num2 < num3)
{
RuleMatcher item = new RuleMatcher
{
complexSelector = ruleMatcher.complexSelector,
depth = ((selectors[num2].previousRelationship != StyleSelectorRelationship.Child) ? 2147483647 : (depth + 1)),
simpleSelectorIndex = num2,
sheet = ruleMatcher.sheet
};
this.m_Matchers.Add(item);
}
else
{
StyleRule rule = ruleMatcher.complexSelector.rule;
int specificity = ruleMatcher.complexSelector.specificity;
num = (num * 397L ^ (long)rule.GetHashCode());
num = (num * 397L ^ (long)specificity);
this.m_MatchedRules.Add(new StyleContext.RuleRef
{
selector = ruleMatcher.complexSelector,
sheet = ruleMatcher.sheet
});
}
}
}
VisualElementStyles visualElementStyles;
if (StyleContext.s_StyleCache.TryGetValue(num, out visualElementStyles))
{
element.SetSharedStyles(visualElementStyles);
}
else
{
visualElementStyles = new VisualElementStyles(true);
int j = 0;
int count3 = this.m_MatchedRules.Count;
while (j < count3)
{
StyleContext.RuleRef ruleRef = this.m_MatchedRules[j];
StylePropertyID[] propertyIDs = StyleSheetCache.GetPropertyIDs(ruleRef.sheet, ruleRef.selector.ruleIndex);
visualElementStyles.ApplyRule(ruleRef.sheet, ruleRef.selector.specificity, ruleRef.selector.rule, propertyIDs, this.m_VisualTree.elementPanel.loadResourceFunc);
j++;
}
StyleContext.s_StyleCache[num] = visualElementStyles;
element.SetSharedStyles(visualElementStyles);
}
if (visualContainer != null)
{
for (int k = 0; k < visualContainer.childrenCount; k++)
{
VisualElement childAt = visualContainer.GetChildAt(k);
this.UpdateStyles(childAt, depth + 1);
}
}
if (this.m_Matchers.Count > count)
{
this.m_Matchers.RemoveRange(count, this.m_Matchers.Count - count);
}
}
}
