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Add merging ASEnvironmentStateExtensions on upward propegation

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This commit is contained in:
Michael Schneider
2016-04-05 14:21:55 -07:00
parent 41eb1917e4
commit 27cc2bec82
2 changed files with 51 additions and 24 deletions
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2
AsyncDisplayKit/Private/ASEnvironmentInternal.h
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@@ -35,6 +35,8 @@ void ASEnvironmentPerformBlockOnObjectAndParents(id<ASEnvironment> object, void(
#pragma mark - Merging
static const struct ASEnvironmentStateExtensions ASEnvironmentDefaultStateExtensions = {};
static const struct ASEnvironmentLayoutOptionsState ASEnvironmentDefaultLayoutOptionsState = {};
ASEnvironmentState ASEnvironmentMergeObjectAndState(ASEnvironmentState environmentState, ASEnvironmentLayoutOptionsState state, ASEnvironmentStatePropagation propagation);

73
AsyncDisplayKit/Private/ASEnvironmentInternal.mm
View File

@@ -96,13 +96,13 @@ UIEdgeInsets _ASEnvironmentLayoutOptionsExtensionGetEdgeInsetsAtIndex(id<ASEnvir
#pragma mark - Merging functions for states
ASEnvironmentState ASEnvironmentMergeObjectAndState(ASEnvironmentState environmentState, ASEnvironmentHierarchyState state, ASEnvironmentStatePropagation propagation) {
ASEnvironmentState ASEnvironmentMergeObjectAndState(ASEnvironmentState environmentState, ASEnvironmentHierarchyState hierarchyState, ASEnvironmentStatePropagation propagation) {
// Merge object and hierarchy state
LOG(@"Merge object and state: %@ - ASEnvironmentHierarchyState", object);
return environmentState;
}
ASEnvironmentState ASEnvironmentMergeObjectAndState(ASEnvironmentState environmentState, ASEnvironmentLayoutOptionsState state, ASEnvironmentStatePropagation propagation) {
ASEnvironmentState ASEnvironmentMergeObjectAndState(ASEnvironmentState environmentState, ASEnvironmentLayoutOptionsState layoutOptionsState, ASEnvironmentStatePropagation propagation) {
// Merge object and layout options state
LOG(@"Merge object and state: %@ - ASEnvironmentLayoutOptionsState", object);
@@ -111,40 +111,65 @@ ASEnvironmentState ASEnvironmentMergeObjectAndState(ASEnvironmentState environme
// Object is the parent and the state is the state of the child
const ASEnvironmentLayoutOptionsState defaultState = ASEnvironmentDefaultLayoutOptionsState;
ASEnvironmentLayoutOptionsState parentState = environmentState.layoutOptionsState;
ASEnvironmentLayoutOptionsState parentLayoutOptionsState = environmentState.layoutOptionsState;
// For every field check if the parent value is equal to the default than propegate up the child value to
// the parent
if (parentState.spacingBefore == defaultState.spacingBefore) {
parentState.spacingBefore = state.spacingBefore;
// For every field check if the parent value is equal to the default and if so propegate up the value of the passed
// in layout options state
if (parentLayoutOptionsState.spacingBefore == defaultState.spacingBefore) {
parentLayoutOptionsState.spacingBefore = layoutOptionsState.spacingBefore;
}
if (parentState.spacingAfter == defaultState.spacingAfter) {
parentState.spacingAfter = state.spacingAfter;
if (parentLayoutOptionsState.spacingAfter == defaultState.spacingAfter) {
parentLayoutOptionsState.spacingAfter = layoutOptionsState.spacingAfter;
}
if (parentState.alignSelf == defaultState.alignSelf) {
parentState.alignSelf = state.alignSelf;
if (parentLayoutOptionsState.alignSelf == defaultState.alignSelf) {
parentLayoutOptionsState.alignSelf = layoutOptionsState.alignSelf;
}
if (parentState.flexGrow == defaultState.flexGrow) {
parentState.flexGrow = state.flexGrow;
if (parentLayoutOptionsState.flexGrow == defaultState.flexGrow) {
parentLayoutOptionsState.flexGrow = layoutOptionsState.flexGrow;
}
if (ASRelativeDimensionEqualToRelativeDimension(parentState.flexBasis, defaultState.flexBasis)) {
parentState.flexBasis = state.flexBasis;
if (ASRelativeDimensionEqualToRelativeDimension(parentLayoutOptionsState.flexBasis, defaultState.flexBasis)) {
parentLayoutOptionsState.flexBasis = layoutOptionsState.flexBasis;
}
if (parentState.alignSelf == defaultState.alignSelf) {
parentState.alignSelf = state.alignSelf;
if (parentLayoutOptionsState.alignSelf == defaultState.alignSelf) {
parentLayoutOptionsState.alignSelf = layoutOptionsState.alignSelf;
}
if (parentState.ascender == defaultState.ascender) {
parentState.ascender = state.ascender;
if (parentLayoutOptionsState.ascender == defaultState.ascender) {
parentLayoutOptionsState.ascender = layoutOptionsState.ascender;
}
if (ASRelativeSizeRangeEqualToRelativeSizeRange(parentState.sizeRange, defaultState.sizeRange)) {
parentState.sizeRange = state.sizeRange;
if (ASRelativeSizeRangeEqualToRelativeSizeRange(parentLayoutOptionsState.sizeRange, defaultState.sizeRange)) {
parentLayoutOptionsState.sizeRange = layoutOptionsState.sizeRange;
}
if (CGPointEqualToPoint(parentState.layoutPosition, defaultState.layoutPosition)) {
parentState.layoutPosition = state.layoutPosition;
if (CGPointEqualToPoint(parentLayoutOptionsState.layoutPosition, defaultState.layoutPosition)) {
parentLayoutOptionsState.layoutPosition = layoutOptionsState.layoutPosition;
}
environmentState.layoutOptionsState = parentState;
// Merge extended values if necessary
const ASEnvironmentStateExtensions defaultExtensions = ASEnvironmentDefaultStateExtensions;
const ASEnvironmentStateExtensions layoutOptionsStateExtensions = layoutOptionsState._extensions;
ASEnvironmentStateExtensions parentLayoutOptionsExtensions = parentLayoutOptionsState._extensions;
for (int i = 0; i < kMaxEnvironmentStateBoolExtensions; i++) {
if (parentLayoutOptionsExtensions.boolExtensions[i] == defaultExtensions.boolExtensions[i]) {
parentLayoutOptionsExtensions.boolExtensions[i] = layoutOptionsStateExtensions.boolExtensions[i];
}
}
for (int i = 0; i < kMaxEnvironmentStateIntegerExtensions; i++) {
if (parentLayoutOptionsExtensions.integerExtensions[i] == defaultExtensions.integerExtensions[i]) {
parentLayoutOptionsExtensions.integerExtensions[i] = layoutOptionsStateExtensions.integerExtensions[i];
}
}
for (int i = 0; i < kMaxEnvironmentStateEdgeInsetExtensions; i++) {
if (UIEdgeInsetsEqualToEdgeInsets(parentLayoutOptionsExtensions.edgeInsetsExtensions[i], defaultExtensions.edgeInsetsExtensions[i])) {
parentLayoutOptionsExtensions.edgeInsetsExtensions[i] = layoutOptionsStateExtensions.edgeInsetsExtensions[i];
}
}
parentLayoutOptionsState._extensions = parentLayoutOptionsExtensions;
// Update layout options state
environmentState.layoutOptionsState = parentLayoutOptionsState;
}
return environmentState;