diff options
| author | Fabian Guerra <fabian.guerra@mapbox.com> | 2018-04-24 16:51:31 -0400 |
|---|---|---|
| committer | Fabian Guerra <fabian.guerra@mapbox.com> | 2018-04-25 09:47:17 -0400 |
| commit | 129730f3ea8c1c3ae3a56acd8c7ec0182f6c3d0a (patch) | |
| tree | 97ec3c4a2e82d183f98270f7ddebd94bdd3c2b32 | |
| parent | 536860d5522123906ea9c3e3fa0b14e00a4aadc5 (diff) | |
| download | qtlocation-mapboxgl-129730f3ea8c1c3ae3a56acd8c7ec0182f6c3d0a.tar.gz | |
[ios, macos] Add support for subscripting in expressions.
| -rw-r--r-- | platform/darwin/src/NSExpression+MGLAdditions.mm | 19 | ||||
| -rw-r--r-- | platform/darwin/test/MGLExpressionTests.mm | 27 |
2 files changed, 45 insertions, 1 deletions
diff --git a/platform/darwin/src/NSExpression+MGLAdditions.mm b/platform/darwin/src/NSExpression+MGLAdditions.mm index c82a7dc008..d74e388b8e 100644 --- a/platform/darwin/src/NSExpression+MGLAdditions.mm +++ b/platform/darwin/src/NSExpression+MGLAdditions.mm @@ -1097,7 +1097,24 @@ NSArray *MGLSubexpressionsWithJSONObjects(NSArray *objects) { NSArray *arguments = self.arguments.mgl_jsonExpressionObject; return [@[@"concat", self.operand.mgl_jsonExpressionObject] arrayByAddingObjectsFromArray:arguments]; } else if ([function isEqualToString:@"objectFrom:withIndex:"]) { - return @[@"at", self.arguments[1].mgl_jsonExpressionObject, self.arguments[0].mgl_jsonExpressionObject]; + id index = self.arguments[1].mgl_jsonExpressionObject; + + if ([self.arguments[1] expressionType] == NSConstantValueExpressionType + && [[self.arguments[1] constantValue] isKindOfClass:[NSString class]]) { + id value = self.arguments[1].constantValue; + + if ([value isEqualToString:@"FIRST"]) { + index = [NSExpression expressionForConstantValue:@0].mgl_jsonExpressionObject; + } else if ([value isEqualToString:@"LAST"]) { + NSExpression *count = [NSExpression expressionWithFormat:@"count(%@) - 1", self.arguments[0]]; + id last = [count expressionValueWithObject:nil context:nil]; + index = [NSExpression expressionForConstantValue:last].mgl_jsonExpressionObject; + } else if ([value isEqualToString:@"SIZE"]) { + return [NSExpression expressionWithFormat:@"count(%@)", self.arguments[0]].mgl_jsonExpressionObject; + } + } + + return @[@"at", index, self.arguments[0].mgl_jsonExpressionObject]; } else if ([function isEqualToString:@"boolValue"]) { return @[@"to-boolean", self.operand.mgl_jsonExpressionObject]; } else if ([function isEqualToString:@"mgl_number"] || diff --git a/platform/darwin/test/MGLExpressionTests.mm b/platform/darwin/test/MGLExpressionTests.mm index d54e961b00..31ed806c41 100644 --- a/platform/darwin/test/MGLExpressionTests.mm +++ b/platform/darwin/test/MGLExpressionTests.mm @@ -832,6 +832,33 @@ using namespace std::string_literals; MGLConstantExpression(@8), MGLConstantExpression(@7)]]; NSExpression *expression = [NSExpression expressionForFunction:@"objectFrom:withIndex:" + arguments:@[array, MGLConstantExpression(@"FIRST")]]; + NSArray *jsonExpression = @[@"at", @0, @[ @"literal", @[@9, @8, @7]]]; + XCTAssertEqualObjects(expression.mgl_jsonExpressionObject, jsonExpression); + } + { + NSExpression *array = [NSExpression expressionForAggregate:@[MGLConstantExpression(@9), + MGLConstantExpression(@8), + MGLConstantExpression(@7)]]; + NSExpression *expression = [NSExpression expressionForFunction:@"objectFrom:withIndex:" + arguments:@[array, MGLConstantExpression(@"LAST")]]; + NSArray *jsonExpression = @[@"at", @2, @[ @"literal", @[@9, @8, @7]]]; + XCTAssertEqualObjects(expression.mgl_jsonExpressionObject, jsonExpression); + } + { + NSExpression *array = [NSExpression expressionForAggregate:@[MGLConstantExpression(@9), + MGLConstantExpression(@8), + MGLConstantExpression(@7)]]; + NSExpression *expression = [NSExpression expressionForFunction:@"objectFrom:withIndex:" + arguments:@[array, MGLConstantExpression(@"SIZE")]]; + NSArray *jsonExpression = @[@"length", @[ @"literal", @[@9, @8, @7]]]; + XCTAssertEqualObjects(expression.mgl_jsonExpressionObject, jsonExpression); + } + { + NSExpression *array = [NSExpression expressionForAggregate:@[MGLConstantExpression(@9), + MGLConstantExpression(@8), + MGLConstantExpression(@7)]]; + NSExpression *expression = [NSExpression expressionForFunction:@"objectFrom:withIndex:" arguments:@[array, MGLConstantExpression(@1)]]; NSArray *jsonExpression = @[@"at", @1, @[ @"literal", @[@9, @8, @7]]]; XCTAssertEqualObjects(expression.mgl_jsonExpressionObject, jsonExpression); |