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Implement horizontal and vertical alignments for stack layout

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This commit is contained in:
Huy Nguyen
2015-11-20 17:50:05 +02:00
parent 50a52e7112
commit 0077c3eec6
11 changed files with 235 additions and 8 deletions
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90
AsyncDisplayKitTests/ASStackLayoutSpecSnapshotTests.mm
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@@ -28,6 +28,8 @@
self.recordMode = NO;
}
#pragma mark - Utility methods
static NSArray *defaultSubnodes()
{
return defaultSubnodesWithSameSize(CGSizeZero, NO);
@@ -63,6 +65,24 @@ static NSArray *defaultSubnodesWithSameSize(CGSize subnodeSize, BOOL flex)
[self testStackLayoutSpecWithStyle:style sizeRange:sizeRange subnodes:subnodes identifier:identifier];
}
- (void)testStackLayoutSpecWithDirection:(ASStackLayoutDirection)direction
itemsHorizontalAlignment:(ASHorizontalAlignment)horizontalAlignment
itemsVerticalAlignment:(ASVerticalAlignment)verticalAlignment
identifier:(NSString *)identifier
{
NSArray *subnodes = defaultSubnodesWithSameSize({50, 50}, NO);
ASStackLayoutSpec *stackLayoutSpec = [[ASStackLayoutSpec alloc] init];
stackLayoutSpec.direction = direction;
stackLayoutSpec.children = subnodes;
[stackLayoutSpec setHorizontalAlignment:horizontalAlignment];
[stackLayoutSpec setVerticalAlignment:verticalAlignment];
CGSize exactSize = CGSizeMake(200, 200);
static ASSizeRange kSize = ASSizeRangeMake(exactSize, exactSize);
[self testStackLayoutSpec:stackLayoutSpec sizeRange:kSize subnodes:subnodes identifier:identifier];
}
- (void)testStackLayoutSpecWithStyle:(ASStackLayoutSpecStyle)style
sizeRange:(ASSizeRange)sizeRange
subnodes:(NSArray *)subnodes
@@ -76,13 +96,23 @@ static NSArray *defaultSubnodesWithSameSize(CGSize subnodeSize, BOOL flex)
sizeRange:(ASSizeRange)sizeRange
subnodes:(NSArray *)subnodes
identifier:(NSString *)identifier
{
ASStackLayoutSpec *stackLayoutSpec = [ASStackLayoutSpec stackLayoutSpecWithDirection:style.direction
spacing:style.spacing
justifyContent:style.justifyContent
alignItems:style.alignItems
children:children];
[self testStackLayoutSpec:stackLayoutSpec sizeRange:sizeRange subnodes:subnodes identifier:identifier];
}
- (void)testStackLayoutSpec:(ASStackLayoutSpec *)stackLayoutSpec
sizeRange:(ASSizeRange)sizeRange
subnodes:(NSArray *)subnodes
identifier:(NSString *)identifier
{
ASDisplayNode *backgroundNode = ASDisplayNodeWithBackgroundColor([UIColor whiteColor]);
ASLayoutSpec *layoutSpec =
[ASBackgroundLayoutSpec
backgroundLayoutSpecWithChild:[ASStackLayoutSpec stackLayoutSpecWithDirection:style.direction spacing:style.spacing justifyContent:style.justifyContent alignItems:style.alignItems children:children]
background:backgroundNode];
ASLayoutSpec *layoutSpec = [ASBackgroundLayoutSpec backgroundLayoutSpecWithChild:stackLayoutSpec background:backgroundNode];
NSMutableArray *newSubnodes = [NSMutableArray arrayWithObject:backgroundNode];
[newSubnodes addObjectsFromArray:subnodes];
@@ -90,6 +120,8 @@ static NSArray *defaultSubnodesWithSameSize(CGSize subnodeSize, BOOL flex)
[self testLayoutSpec:layoutSpec sizeRange:sizeRange subnodes:newSubnodes identifier:identifier];
}
#pragma mark -
- (void)testUnderflowBehaviors
{
// width 300px; height 0-300px
@@ -522,4 +554,54 @@ static NSArray *defaultSubnodesWithSameSize(CGSize subnodeSize, BOOL flex)
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testHorizontalAndVerticalAlignments
{
[self testStackLayoutSpecWithDirection:ASStackLayoutDirectionHorizontal itemsHorizontalAlignment:ASAlignmentLeft itemsVerticalAlignment:ASAlignmentTop identifier:@"horizontalTopLeft"];
[self testStackLayoutSpecWithDirection:ASStackLayoutDirectionHorizontal itemsHorizontalAlignment:ASAlignmentMiddle itemsVerticalAlignment:ASAlignmentCenter identifier:@"horizontalCenter"];
[self testStackLayoutSpecWithDirection:ASStackLayoutDirectionHorizontal itemsHorizontalAlignment:ASAlignmentRight itemsVerticalAlignment:ASAlignmentBottom identifier:@"horizontalBottomRight"];
[self testStackLayoutSpecWithDirection:ASStackLayoutDirectionVertical itemsHorizontalAlignment:ASAlignmentLeft itemsVerticalAlignment:ASAlignmentTop identifier:@"verticalTopLeft"];
[self testStackLayoutSpecWithDirection:ASStackLayoutDirectionVertical itemsHorizontalAlignment:ASAlignmentMiddle itemsVerticalAlignment:ASAlignmentCenter identifier:@"verticalCenter"];
[self testStackLayoutSpecWithDirection:ASStackLayoutDirectionVertical itemsHorizontalAlignment:ASAlignmentRight itemsVerticalAlignment:ASAlignmentBottom identifier:@"verticalBottomRight"];
}
- (void)testDirectionChangeAfterSettingHorizontalAndVerticalAlignments
{
ASStackLayoutSpec *stackLayoutSpec = [[ASStackLayoutSpec alloc] init]; // Default direction is horizontal
stackLayoutSpec.horizontalAlignment = ASAlignmentRight;
stackLayoutSpec.verticalAlignment = ASAlignmentCenter;
XCTAssertEqual(stackLayoutSpec.alignItems, ASStackLayoutAlignItemsCenter);
XCTAssertEqual(stackLayoutSpec.justifyContent, ASStackLayoutJustifyContentEnd);
stackLayoutSpec.direction = ASStackLayoutDirectionVertical;
XCTAssertEqual(stackLayoutSpec.alignItems, ASStackLayoutAlignItemsEnd);
XCTAssertEqual(stackLayoutSpec.justifyContent, ASStackLayoutJustifyContentCenter);
}
- (void)testAlignItemsAndJustifyContentRestrictionsIfHorizontalAndVerticalAlignmentsAreUsed
{
ASStackLayoutSpec *stackLayoutSpec = [[ASStackLayoutSpec alloc] init];
// No assertions should be thrown here because alignments are not used
stackLayoutSpec.alignItems = ASStackLayoutAlignItemsEnd;
stackLayoutSpec.justifyContent = ASStackLayoutJustifyContentEnd;
// Set alignments and assert that assertions are thrown
stackLayoutSpec.horizontalAlignment = ASAlignmentMiddle;
stackLayoutSpec.verticalAlignment = ASAlignmentCenter;
XCTAssertThrows(stackLayoutSpec.alignItems = ASStackLayoutAlignItemsEnd);
XCTAssertThrows(stackLayoutSpec.justifyContent = ASStackLayoutJustifyContentEnd);
// Unset alignments. alignItems and justifyContent should not be changed
stackLayoutSpec.horizontalAlignment = ASHorizontalAlignmentNone;
stackLayoutSpec.verticalAlignment = ASVerticalAlignmentNone;
XCTAssertEqual(stackLayoutSpec.alignItems, ASStackLayoutAlignItemsCenter);
XCTAssertEqual(stackLayoutSpec.justifyContent, ASStackLayoutJustifyContentCenter);
// Now that alignments are none, setting alignItems and justifyContent should be allowed again
stackLayoutSpec.alignItems = ASStackLayoutAlignItemsEnd;
stackLayoutSpec.justifyContent = ASStackLayoutJustifyContentEnd;
XCTAssertEqual(stackLayoutSpec.alignItems, ASStackLayoutAlignItemsEnd);
XCTAssertEqual(stackLayoutSpec.justifyContent, ASStackLayoutJustifyContentEnd);
}
@end