static VisualElement CloneSetupRecursively(VisualTreeAsset vta, VisualElementAsset root,
Dictionary <int, List <VisualElementAsset> > idToChildren, CreationContext context)
{
#if UNITY_2019_3_OR_NEWER
var resolvedSheets = new List <StyleSheet>();
foreach (var sheetPath in root.stylesheetPaths)
{
resolvedSheets.Add(AssetDatabase.LoadAssetAtPath <StyleSheet>(sheetPath));
}
root.stylesheets = resolvedSheets;
#endif
var ve = VisualTreeAsset.Create(root, context);
// Linking the new element with its VisualElementAsset.
// All this copied code for this one line!
ve.SetProperty(BuilderConstants.ElementLinkedVisualElementAssetVEPropertyName, root);
// context.target is the created templateContainer
if (root.id == context.visualTreeAsset.contentContainerId)
{
if (context.target is TemplateContainer)
{
((TemplateContainer)context.target).SetContentContainer(ve);
}
else
{
Debug.LogError(
"Trying to clone a VisualTreeAsset with a custom content container into a element which is not a template container");
}
}
// if the current element had a slot-name attribute, put it in the resulting slot mapping
string slotName;
if (context.slotInsertionPoints != null && vta.TryGetSlotInsertionPoint(root.id, out slotName))
{
context.slotInsertionPoints.Add(slotName, ve);
}
if (root.classes != null)
{
for (int i = 0; i < root.classes.Length; i++)
{
ve.AddToClassList(root.classes[i]);
}
}
if (root.ruleIndex != -1)
{
if (vta.inlineSheet == null)
{
Debug.LogWarning("VisualElementAsset has a RuleIndex but no inlineStyleSheet");
}
else
{
var rule = vta.inlineSheet.rules[root.ruleIndex];
#if UNITY_2020_1_OR_NEWER
ve.SetInlineRule(vta.inlineSheet, rule);
#elif UNITY_2019_3_OR_NEWER
var stylesData = new VisualElementStylesData(false);
ve.SetInlineStyles(stylesData);
s_StylePropertyReader.SetInlineContext(vta.inlineSheet, rule, root.ruleIndex);
stylesData.ApplyProperties(s_StylePropertyReader, null);
#else
var stylesData = new VisualElementStylesData(false);
ve.SetInlineStyles(stylesData);
var propIds = StyleSheetCache.GetPropertyIDs(vta.inlineSheet, root.ruleIndex);
stylesData.ApplyRule(vta.inlineSheet, Int32.MaxValue, rule, propIds);
#endif
}
}
var templateAsset = root as TemplateAsset;
if (templateAsset != null)
{
var templatePath = vta.GetPathFromTemplateName(templateAsset.templateAlias);
ve.SetProperty(BuilderConstants.LibraryItemLinkedTemplateContainerPathVEPropertyName, templatePath);
var instancedTemplateVTA = vta.ResolveTemplate(templateAsset.templateAlias);
if (instancedTemplateVTA != null)
{
ve.SetProperty(BuilderConstants.ElementLinkedInstancedVisualTreeAssetVEPropertyName, instancedTemplateVTA);
}
}
List <VisualElementAsset> children;
if (idToChildren.TryGetValue(root.id, out children))
{
children.Sort(VisualTreeAssetUtilities.CompareForOrder);
foreach (VisualElementAsset childVea in children)
{
// this will fill the slotInsertionPoints mapping
VisualElement childVe = CloneSetupRecursively(vta, childVea, idToChildren, context);
if (childVe == null)
{
continue;
}
// if the parent is not a template asset, just add the child to whatever hierarchy we currently have
// if ve is a scrollView (with contentViewport as contentContainer), this will go to the right place
if (templateAsset == null)
{
ve.Add(childVe);
continue;
}
int index = templateAsset.slotUsages == null
? -1
: templateAsset.slotUsages.FindIndex(u => u.assetId == childVea.id);
if (index != -1)
{
VisualElement parentSlot;
string key = templateAsset.slotUsages[index].slotName;
Assert.IsFalse(String.IsNullOrEmpty(key),
"a lost name should not be null or empty, this probably points to an importer or serialization bug");
if (context.slotInsertionPoints == null ||
!context.slotInsertionPoints.TryGetValue(key, out parentSlot))
{
Debug.LogErrorFormat("Slot '{0}' was not found. Existing slots: {1}", key,
context.slotInsertionPoints == null
? String.Empty
: String.Join(", ",
System.Linq.Enumerable.ToArray(context.slotInsertionPoints.Keys)));
ve.Add(childVe);
}
else
{
parentSlot.Add(childVe);
}
}
else
{
ve.Add(childVe);
}
}
}
if (templateAsset != null && context.slotInsertionPoints != null)
{
context.slotInsertionPoints.Clear();
}
return(ve);
}
void ProcessMatchedRules(VisualElement element, List <SelectorMatchRecord> matchingSelectors)
{
matchingSelectors.Sort(SelectorMatchRecord.Compare);
Int64 matchingRulesHash = element.fullTypeName.GetHashCode();
// Let current DPI contribute to the hash so cache is invalidated when this changes
matchingRulesHash = (matchingRulesHash * 397) ^ currentPixelsPerPoint.GetHashCode();
int oldVariablesHash = m_StyleMatchingContext.variableContext.GetVariableHash();
int customPropertiesCount = 0;
foreach (var record in matchingSelectors)
{
StyleRule rule = record.complexSelector.rule;
int specificity = record.complexSelector.specificity;
matchingRulesHash = (matchingRulesHash * 397) ^ rule.GetHashCode();
matchingRulesHash = (matchingRulesHash * 397) ^ specificity;
if (rule.customPropertiesCount > 0)
{
customPropertiesCount += rule.customPropertiesCount;
ProcessMatchedVariables(record.sheet, rule);
}
}
int variablesHash = customPropertiesCount > 0 ? m_ProcessVarContext.GetVariableHash() : oldVariablesHash;
matchingRulesHash = (matchingRulesHash * 397) ^ variablesHash;
if (oldVariablesHash != variablesHash)
{
StyleVariableContext ctx;
if (!StyleCache.TryGetValue(variablesHash, out ctx))
{
ctx = new StyleVariableContext(m_ProcessVarContext);
StyleCache.SetValue(variablesHash, ctx);
}
m_StyleMatchingContext.variableContext = ctx;
}
element.variableContext = m_StyleMatchingContext.variableContext;
VisualElementStylesData resolvedStyles;
if (StyleCache.TryGetValue(matchingRulesHash, out resolvedStyles))
{
element.SetSharedStyles(resolvedStyles);
}
else
{
resolvedStyles = new VisualElementStylesData(isShared: true);
foreach (var record in matchingSelectors)
{
m_StylePropertyReader.SetContext(record.sheet, record.complexSelector, m_StyleMatchingContext.variableContext);
resolvedStyles.ApplyProperties(m_StylePropertyReader, m_StyleMatchingContext.inheritedStyle);
}
resolvedStyles.ApplyLayoutValues();
StyleCache.SetValue(matchingRulesHash, resolvedStyles);
element.SetSharedStyles(resolvedStyles);
}
}
private VisualElement CloneSetupRecursively(VisualElementAsset root,
Dictionary <int, List <VisualElementAsset> > idToChildren, CreationContext context)
{
VisualElement ve = Create(root, context);
// context.target is the created templateContainer
if (root.id == context.visualTreeAsset.contentContainerId)
{
if (context.target is TemplateContainer)
{
((TemplateContainer)context.target).SetContentContainer(ve);
}
else
{
Debug.LogError(
"Trying to clone a VisualTreeAsset with a custom content container into a element which is not a template container");
}
}
// if the current element had a slot-name attribute, put it in the resulting slot mapping
string slotName;
if (context.slotInsertionPoints != null && TryGetSlotInsertionPoint(root.id, out slotName))
{
context.slotInsertionPoints.Add(slotName, ve);
}
if (root.classes != null)
{
for (int i = 0; i < root.classes.Length; i++)
{
ve.AddToClassList(root.classes[i]);
}
}
if (root.ruleIndex != -1)
{
if (inlineSheet == null)
{
Debug.LogWarning("VisualElementAsset has a RuleIndex but no inlineStyleSheet");
}
else
{
StyleRule r = inlineSheet.rules[root.ruleIndex];
var stylesData = new VisualElementStylesData(false);
ve.SetInlineStyles(stylesData);
s_StylePropertyReader.SetInlineContext(inlineSheet, r, root.ruleIndex);
stylesData.ApplyProperties(s_StylePropertyReader, null);
}
}
var templateAsset = root as TemplateAsset;
List <VisualElementAsset> children;
if (idToChildren.TryGetValue(root.id, out children))
{
children.Sort(CompareForOrder);
foreach (VisualElementAsset childVea in children)
{
// this will fill the slotInsertionPoints mapping
VisualElement childVe = CloneSetupRecursively(childVea, idToChildren, context);
if (childVe == null)
{
continue;
}
// if the parent is not a template asset, just add the child to whatever hierarchy we currently have
// if ve is a scrollView (with contentViewport as contentContainer), this will go to the right place
if (templateAsset == null)
{
ve.Add(childVe);
continue;
}
int index = templateAsset.slotUsages == null
? -1
: templateAsset.slotUsages.FindIndex(u => u.assetId == childVea.id);
if (index != -1)
{
VisualElement parentSlot;
string key = templateAsset.slotUsages[index].slotName;
Assert.IsFalse(String.IsNullOrEmpty(key),
"a lost name should not be null or empty, this probably points to an importer or serialization bug");
if (context.slotInsertionPoints == null ||
!context.slotInsertionPoints.TryGetValue(key, out parentSlot))
{
Debug.LogErrorFormat("Slot '{0}' was not found. Existing slots: {1}", key,
context.slotInsertionPoints == null
? String.Empty
: String.Join(", ",
System.Linq.Enumerable.ToArray(context.slotInsertionPoints.Keys)));
ve.Add(childVe);
}
else
{
parentSlot.Add(childVe);
}
}
else
{
ve.Add(childVe);
}
}
}
if (templateAsset != null && context.slotInsertionPoints != null)
{
context.slotInsertionPoints.Clear();
}
return(ve);
}
