1496 lines
69 KiB
Plaintext
1496 lines
69 KiB
Plaintext
#import "NSExpression+MGLPrivateAdditions.h"
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#import "MGLTypes.h"
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#if TARGET_OS_IPHONE
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#import "UIColor+MGLAdditions.h"
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#define MGLEdgeInsets UIEdgeInsets
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#else
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#import "NSColor+MGLAdditions.h"
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#define MGLEdgeInsets NSEdgeInsets
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#endif
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#import "NSPredicate+MGLAdditions.h"
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#import "NSValue+MGLStyleAttributeAdditions.h"
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#import "MGLVectorTileSource_Private.h"
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#import <objc/runtime.h>
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#import <mbgl/style/expression/expression.hpp>
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const MGLExpressionInterpolationMode MGLExpressionInterpolationModeLinear = @"linear";
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const MGLExpressionInterpolationMode MGLExpressionInterpolationModeExponential = @"exponential";
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const MGLExpressionInterpolationMode MGLExpressionInterpolationModeCubicBezier = @"cubic-bezier";
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@interface MGLAftermarketExpressionInstaller: NSObject
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@end
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@implementation MGLAftermarketExpressionInstaller
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+ (void)load {
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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[self installFunctions];
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});
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}
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/**
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Adds to NSExpression’s built-in repertoire of functions.
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*/
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+ (void)installFunctions {
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Class MGLAftermarketExpressionInstaller = [self class];
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// NSExpression’s built-in functions are backed by class methods on a
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// private class, so use a function expression to get at the class.
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// http://funwithobjc.tumblr.com/post/2922267976/using-custom-functions-with-nsexpression
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NSExpression *functionExpression = [NSExpression expressionWithFormat:@"sum({})"];
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NSString *className = NSStringFromClass([functionExpression.operand.constantValue class]);
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// Effectively categorize the class with some extra class methods.
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Class NSPredicateUtilities = objc_getMetaClass(className.UTF8String);
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wundeclared-selector"
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#define INSTALL_METHOD(sel) \
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{ \
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Method method = class_getInstanceMethod(MGLAftermarketExpressionInstaller, @selector(sel)); \
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class_addMethod(NSPredicateUtilities, @selector(sel), method_getImplementation(method), method_getTypeEncoding(method)); \
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}
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#define INSTALL_CONTROL_STRUCTURE(sel) \
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{ \
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Method method = class_getInstanceMethod(MGLAftermarketExpressionInstaller, @selector(sel:)); \
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class_addMethod(NSPredicateUtilities, @selector(sel), method_getImplementation(method), method_getTypeEncoding(method)); \
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class_addMethod(NSPredicateUtilities, @selector(sel:), method_getImplementation(method), method_getTypeEncoding(method)); \
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}
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// Install method-like functions, taking the number of arguments implied by
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// the selector name.
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INSTALL_METHOD(mgl_join:);
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INSTALL_METHOD(mgl_round:);
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INSTALL_METHOD(mgl_interpolate:withCurveType:parameters:stops:);
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INSTALL_METHOD(mgl_step:from:stops:);
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INSTALL_METHOD(mgl_coalesce:);
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INSTALL_METHOD(mgl_does:have:);
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INSTALL_METHOD(mgl_acos:);
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INSTALL_METHOD(mgl_cos:);
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INSTALL_METHOD(mgl_asin:);
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INSTALL_METHOD(mgl_sin:);
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INSTALL_METHOD(mgl_atan:);
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INSTALL_METHOD(mgl_tan:);
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INSTALL_METHOD(mgl_log2:);
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// Install functions that resemble control structures, taking arbitrary
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// numbers of arguments. Vararg aftermarket functions need to be declared
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// with an explicit and implicit first argument.
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INSTALL_CONTROL_STRUCTURE(MGL_LET);
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INSTALL_CONTROL_STRUCTURE(MGL_MATCH);
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INSTALL_CONTROL_STRUCTURE(MGL_IF);
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INSTALL_CONTROL_STRUCTURE(MGL_FUNCTION);
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#undef INSTALL_AFTERMARKET_FN
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#pragma clang diagnostic pop
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}
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/**
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Joins the given components into a single string by concatenating each component
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in order.
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*/
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- (NSString *)mgl_join:(NSArray<NSString *> *)components {
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return [components componentsJoinedByString:@""];
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}
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/**
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Rounds the given number to the nearest integer. If the number is halfway
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between two integers, this method rounds it away from zero.
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*/
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- (NSNumber *)mgl_round:(NSNumber *)number {
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return @(round(number.doubleValue));
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}
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/**
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Computes the principal value of the inverse cosine.
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*/
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- (NSNumber *)mgl_acos:(NSNumber *)number {
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return @(acos(number.doubleValue));
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}
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/**
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Computes the principal value of the cosine.
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*/
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- (NSNumber *)mgl_cos:(NSNumber *)number {
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return @(cos(number.doubleValue));
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}
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/**
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Computes the principal value of the inverse sine.
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*/
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- (NSNumber *)mgl_asin:(NSNumber *)number {
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return @(asin(number.doubleValue));
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}
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/**
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Computes the principal value of the sine.
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*/
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- (NSNumber *)mgl_sin:(NSNumber *)number {
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return @(sin(number.doubleValue));
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}
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/**
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Computes the principal value of the inverse tangent.
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*/
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- (NSNumber *)mgl_atan:(NSNumber *)number {
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return @(atan(number.doubleValue));
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}
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/**
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Computes the principal value of the tangent.
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*/
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- (NSNumber *)mgl_tan:(NSNumber *)number {
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return @(tan(number.doubleValue));
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}
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/**
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Computes the logarithm base two of the value.
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*/
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- (NSNumber *)mgl_log2:(NSNumber *)number {
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return @(log2(number.doubleValue));
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}
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/**
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A placeholder for a method that evaluates an interpolation expression.
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*/
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- (id)mgl_interpolate:(id)inputExpression withCurveType:(NSString *)curveType parameters:(NSDictionary *)params stops:(NSDictionary *)stops {
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[NSException raise:NSInvalidArgumentException
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format:@"Interpolation expressions lack underlying Objective-C implementations."];
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return nil;
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}
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/**
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A placeholder for a method that evaluates a step expression.
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*/
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- (id)mgl_step:(id)inputExpression from:(id)minimumExpression stops:(NSDictionary *)stops {
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[NSException raise:NSInvalidArgumentException
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format:@"Step expressions lack underlying Objective-C implementations."];
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return nil;
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}
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/**
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A placeholder for a method that evaluates a coalesce expression.
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*/
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- (id)mgl_coalesce:(NSArray<NSExpression *> *)elements {
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[NSException raise:NSInvalidArgumentException
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format:@"Coalesce expressions lack underlying Objective-C implementations."];
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return nil;
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}
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/**
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Returns a Boolean value indicating whether the object has a value for the given
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key.
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*/
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- (BOOL)mgl_does:(id)object have:(NSString *)key {
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return [object valueForKey:key] != nil;
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}
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/**
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A placeholder for a method that evaluates an expression based on an arbitrary
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number of variable names and assigned expressions.
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*/
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- (id)MGL_LET:(NSString *)firstVariableName, ... {
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[NSException raise:NSInvalidArgumentException
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format:@"Assignment expressions lack underlying Objective-C implementations."];
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return nil;
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}
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/**
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A placeholder for a method that evaluates an expression and returns the matching element.
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*/
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- (id)MGL_MATCH:(id)firstCondition, ... {
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[NSException raise:NSInvalidArgumentException
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format:@"Assignment expressions lack underlying Objective-C implementations."];
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return nil;
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}
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/**
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A placeholder for a method that evaluates an expression and returns the matching element.
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*/
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- (id)MGL_IF:(id)firstCondition, ... {
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va_list argumentList;
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va_start(argumentList, firstCondition);
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for (id eachExpression = firstCondition; eachExpression; eachExpression = va_arg(argumentList, id)) {
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if ([eachExpression isKindOfClass:[NSComparisonPredicate class]]) {
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id valueExpression = va_arg(argumentList, id);
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if ([eachExpression evaluateWithObject:nil]) {
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return valueExpression;
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}
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} else {
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return eachExpression;
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}
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}
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va_end(argumentList);
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return nil;
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}
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/**
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A placeholder for a catch-all method that evaluates an arbitrary number of
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arguments as an expression according to the Mapbox Style Specification’s
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expression language.
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*/
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- (id)MGL_FUNCTION:(id)firstArgument, ... {
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[NSException raise:NSInvalidArgumentException
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format:@"Mapbox GL function expressions lack underlying Objective-C implementations."];
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return nil;
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}
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@end
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@implementation NSExpression (MGLPrivateAdditions)
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- (std::vector<mbgl::Value>)mgl_aggregateMBGLValue {
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if ([self.constantValue isKindOfClass:[NSArray class]] || [self.constantValue isKindOfClass:[NSSet class]]) {
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std::vector<mbgl::Value> convertedValues;
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for (id value in self.constantValue) {
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NSExpression *expression = value;
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if (![expression isKindOfClass:[NSExpression class]]) {
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expression = [NSExpression expressionForConstantValue:expression];
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}
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convertedValues.push_back(expression.mgl_constantMBGLValue);
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}
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return convertedValues;
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}
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[NSException raise:NSInvalidArgumentException
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format:@"Constant value expression must contain an array or set."];
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return {};
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}
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- (mbgl::Value)mgl_constantMBGLValue {
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id value = self.constantValue;
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if ([value isKindOfClass:NSString.class]) {
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return { std::string([(NSString *)value UTF8String]) };
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} else if ([value isKindOfClass:NSNumber.class]) {
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NSNumber *number = (NSNumber *)value;
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if ((strcmp([number objCType], @encode(char)) == 0) ||
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(strcmp([number objCType], @encode(BOOL)) == 0)) {
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// char: 32-bit boolean
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// BOOL: 64-bit boolean
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return { (bool)number.boolValue };
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} else if (strcmp([number objCType], @encode(double)) == 0) {
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// Double values on all platforms are interpreted precisely.
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return { (double)number.doubleValue };
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} else if (strcmp([number objCType], @encode(float)) == 0) {
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// Float values when taken as double introduce precision problems,
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// so warn the user to avoid them. This would require them to
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// explicitly use -[NSNumber numberWithFloat:] arguments anyway.
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// We still do this conversion in order to provide a valid value.
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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NSLog(@"Float value in expression will be converted to a double; some imprecision may result. "
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@"Use double values explicitly when specifying constant expression values and "
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@"when specifying arguments to predicate and expression format strings. "
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@"This will be logged only once.");
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});
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return { (double)number.doubleValue };
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} else if ([number compare:@(0)] == NSOrderedDescending ||
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[number compare:@(0)] == NSOrderedSame) {
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// Positive integer or zero; use uint64_t per mbgl::Value definition.
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// We use unsigned long long here to avoid any truncation.
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return { (uint64_t)number.unsignedLongLongValue };
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} else if ([number compare:@(0)] == NSOrderedAscending) {
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// Negative integer; use int64_t per mbgl::Value definition.
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// We use long long here to avoid any truncation.
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return { (int64_t)number.longLongValue };
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}
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} else if ([value isKindOfClass:[MGLColor class]]) {
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auto hexString = [(MGLColor *)value mgl_color].stringify();
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return { hexString };
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} else if (value && value != [NSNull null]) {
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[NSException raise:NSInvalidArgumentException
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format:@"Can’t convert %s:%@ to mbgl::Value", [value objCType], value];
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}
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return {};
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}
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- (std::vector<mbgl::FeatureType>)mgl_aggregateFeatureType {
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if ([self.constantValue isKindOfClass:[NSArray class]] || [self.constantValue isKindOfClass:[NSSet class]]) {
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std::vector<mbgl::FeatureType> convertedValues;
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for (id value in self.constantValue) {
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NSExpression *expression = value;
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if (![expression isKindOfClass:[NSExpression class]]) {
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expression = [NSExpression expressionForConstantValue:expression];
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}
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convertedValues.push_back(expression.mgl_featureType);
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}
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return convertedValues;
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}
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[NSException raise:NSInvalidArgumentException
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format:@"Constant value expression must contain an array or set."];
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return {};
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}
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- (mbgl::FeatureType)mgl_featureType {
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id value = self.constantValue;
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if ([value isKindOfClass:NSString.class]) {
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if ([value isEqualToString:@"Point"]) {
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return mbgl::FeatureType::Point;
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}
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if ([value isEqualToString:@"LineString"]) {
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return mbgl::FeatureType::LineString;
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}
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if ([value isEqualToString:@"Polygon"]) {
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return mbgl::FeatureType::Polygon;
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}
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} else if ([value isKindOfClass:NSNumber.class]) {
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switch ([value integerValue]) {
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case 1:
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return mbgl::FeatureType::Point;
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case 2:
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return mbgl::FeatureType::LineString;
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case 3:
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return mbgl::FeatureType::Polygon;
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default:
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break;
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}
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}
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return mbgl::FeatureType::Unknown;
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}
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- (std::vector<mbgl::FeatureIdentifier>)mgl_aggregateFeatureIdentifier {
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if ([self.constantValue isKindOfClass:[NSArray class]] || [self.constantValue isKindOfClass:[NSSet class]]) {
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std::vector<mbgl::FeatureIdentifier> convertedValues;
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for (id value in self.constantValue) {
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NSExpression *expression = value;
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if (![expression isKindOfClass:[NSExpression class]]) {
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expression = [NSExpression expressionForConstantValue:expression];
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}
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convertedValues.push_back(expression.mgl_featureIdentifier);
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}
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return convertedValues;
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}
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[NSException raise:NSInvalidArgumentException
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format:@"Constant value expression must contain an array or set."];
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return {};
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}
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- (mbgl::FeatureIdentifier)mgl_featureIdentifier {
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mbgl::Value mbglValue = self.mgl_constantMBGLValue;
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if (mbglValue.is<std::string>()) {
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return mbglValue.get<std::string>();
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}
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if (mbglValue.is<double>()) {
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return mbglValue.get<double>();
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}
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if (mbglValue.is<uint64_t>()) {
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return mbglValue.get<uint64_t>();
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}
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if (mbglValue.is<int64_t>()) {
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return mbglValue.get<int64_t>();
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}
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return {};
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}
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@end
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@implementation NSObject (MGLExpressionAdditions)
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- (NSNumber *)mgl_number {
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return nil;
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}
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- (NSNumber *)mgl_numberWithFallbackValues:(id)fallbackValue, ... {
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if (self.mgl_number) {
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return self.mgl_number;
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}
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va_list fallbackValues;
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va_start(fallbackValues, fallbackValue);
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for (id value = fallbackValue; value; value = va_arg(fallbackValues, id)) {
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if ([value mgl_number]) {
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return [value mgl_number];
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}
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}
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return nil;
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}
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@end
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@implementation NSNull (MGLExpressionAdditions)
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- (id)mgl_jsonExpressionObject {
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return self;
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}
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@end
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|
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@implementation NSString (MGLExpressionAdditions)
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- (id)mgl_jsonExpressionObject {
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return self;
|
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}
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- (NSNumber *)mgl_number {
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if (self.doubleValue || ![[NSDecimalNumber decimalNumberWithString:self] isEqual:[NSDecimalNumber notANumber]]) {
|
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return @(self.doubleValue);
|
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}
|
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|
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return nil;
|
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}
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@end
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|
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@implementation NSNumber (MGLExpressionAdditions)
|
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- (id)mgl_interpolateWithCurveType:(NSString *)curveType
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parameters:(NSArray *)parameters
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stops:(NSDictionary<NSNumber *, id> *)stops {
|
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[NSException raise:NSInvalidArgumentException
|
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format:@"Interpolation expressions lack underlying Objective-C implementations."];
|
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return nil;
|
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}
|
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|
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- (id)mgl_stepWithMinimum:(id)minimum stops:(NSDictionary<NSNumber *, id> *)stops {
|
||
[NSException raise:NSInvalidArgumentException
|
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format:@"Interpolation expressions lack underlying Objective-C implementations."];
|
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return nil;
|
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}
|
||
|
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- (NSNumber *)mgl_number {
|
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return self;
|
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}
|
||
|
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- (id)mgl_jsonExpressionObject {
|
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if ([self isEqualToNumber:@(M_E)]) {
|
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return @[@"e"];
|
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} else if ([self isEqualToNumber:@(M_PI)]) {
|
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return @[@"pi"];
|
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}
|
||
return self;
|
||
}
|
||
|
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@end
|
||
|
||
@implementation MGLColor (MGLExpressionAdditions)
|
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|
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- (id)mgl_jsonExpressionObject {
|
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auto color = [self mgl_color];
|
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if (color.a == 1) {
|
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return @[@"rgb", @(color.r * 255), @(color.g * 255), @(color.b * 255)];
|
||
}
|
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return @[@"rgba", @(color.r * 255), @(color.g * 255), @(color.b * 255), @(color.a)];
|
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}
|
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|
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@end
|
||
|
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@implementation NSArray (MGLExpressionAdditions)
|
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|
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- (id)mgl_jsonExpressionObject {
|
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return [self valueForKeyPath:@"mgl_jsonExpressionObject"];
|
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}
|
||
|
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- (id)mgl_coalesce {
|
||
[NSException raise:NSInvalidArgumentException
|
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format:@"Coalesce expressions lack underlying Objective-C implementations."];
|
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return nil;
|
||
}
|
||
|
||
@end
|
||
|
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@implementation NSDictionary (MGLExpressionAdditions)
|
||
|
||
- (id)mgl_jsonExpressionObject {
|
||
NSMutableDictionary *expressionObject = [NSMutableDictionary dictionaryWithCapacity:self.count];
|
||
[self enumerateKeysAndObjectsUsingBlock:^(id _Nonnull key, id _Nonnull obj, BOOL * _Nonnull stop) {
|
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expressionObject[[key mgl_jsonExpressionObject]] = [obj mgl_jsonExpressionObject];
|
||
}];
|
||
|
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return expressionObject;
|
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}
|
||
|
||
- (id)mgl_has:(id)element {
|
||
[NSException raise:NSInvalidArgumentException
|
||
format:@"Has expressions lack underlying Objective-C implementations."];
|
||
return nil;
|
||
|
||
}
|
||
|
||
@end
|
||
|
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@implementation NSExpression (MGLExpressionAdditions)
|
||
|
||
- (NSExpression *)mgl_expressionWithContext:(NSDictionary<NSString *, NSExpression *> *)context {
|
||
[NSException raise:NSInternalInconsistencyException
|
||
format:@"Assignment expressions lack underlying Objective-C implementations."];
|
||
return self;
|
||
}
|
||
|
||
- (id)mgl_has:(id)element {
|
||
[NSException raise:NSInvalidArgumentException
|
||
format:@"Has expressions lack underlying Objective-C implementations."];
|
||
return nil;
|
||
}
|
||
|
||
@end
|
||
|
||
@implementation NSExpression (MGLAdditions)
|
||
|
||
+ (NSExpression *)zoomLevelVariableExpression {
|
||
return [NSExpression expressionForVariable:@"zoomLevel"];
|
||
}
|
||
|
||
+ (NSExpression *)heatmapDensityVariableExpression {
|
||
return [NSExpression expressionForVariable:@"heatmapDensity"];
|
||
}
|
||
|
||
+ (NSExpression *)lineProgressVariableExpression {
|
||
return [NSExpression expressionForVariable:@"lineProgress"];
|
||
}
|
||
|
||
+ (NSExpression *)geometryTypeVariableExpression {
|
||
return [NSExpression expressionForVariable:@"geometryType"];
|
||
}
|
||
|
||
+ (NSExpression *)featureIdentifierVariableExpression {
|
||
return [NSExpression expressionForVariable:@"featureIdentifier"];
|
||
}
|
||
|
||
+ (NSExpression *)featureAttributesVariableExpression {
|
||
return [NSExpression expressionForVariable:@"featureAttributes"];
|
||
}
|
||
|
||
+ (NSExpression *)featurePropertiesVariableExpression {
|
||
return [self featureAttributesVariableExpression];
|
||
}
|
||
|
||
+ (instancetype)mgl_expressionForConditional:(nonnull NSPredicate *)conditionPredicate trueExpression:(nonnull NSExpression *)trueExpression falseExpresssion:(nonnull NSExpression *)falseExpression {
|
||
return [NSExpression expressionForConditional:conditionPredicate trueExpression:trueExpression falseExpression:falseExpression];
|
||
}
|
||
|
||
+ (instancetype)mgl_expressionForSteppingExpression:(nonnull NSExpression *)steppingExpression fromExpression:(nonnull NSExpression *)minimumExpression stops:(nonnull NSExpression *)stops {
|
||
return [NSExpression expressionForFunction:@"mgl_step:from:stops:"
|
||
arguments:@[steppingExpression, minimumExpression, stops]];
|
||
}
|
||
|
||
+ (instancetype)mgl_expressionForInterpolatingExpression:(nonnull NSExpression *)inputExpression withCurveType:(nonnull MGLExpressionInterpolationMode)curveType parameters:(nullable NSExpression *)parameters stops:(nonnull NSExpression *)stops {
|
||
NSExpression *sanitizeParams = parameters ? parameters : [NSExpression expressionForConstantValue:nil];
|
||
return [NSExpression expressionForFunction:@"mgl_interpolate:withCurveType:parameters:stops:"
|
||
arguments:@[inputExpression, [NSExpression expressionForConstantValue:curveType], sanitizeParams, stops]];
|
||
}
|
||
|
||
+ (instancetype)mgl_expressionForMatchingExpression:(nonnull NSExpression *)inputExpression inDictionary:(nonnull NSDictionary<NSExpression *, NSExpression *> *)matchedExpressions defaultExpression:(nonnull NSExpression *)defaultExpression {
|
||
NSMutableArray *optionsArray = [NSMutableArray arrayWithObjects:inputExpression, nil];
|
||
|
||
NSEnumerator *matchEnumerator = matchedExpressions.keyEnumerator;
|
||
while (NSExpression *key = matchEnumerator.nextObject) {
|
||
[optionsArray addObject:key];
|
||
[optionsArray addObject:[matchedExpressions objectForKey:key]];
|
||
}
|
||
|
||
[optionsArray addObject:defaultExpression];
|
||
return [NSExpression expressionForFunction:@"MGL_MATCH"
|
||
arguments:optionsArray];
|
||
}
|
||
|
||
- (instancetype)mgl_expressionByAppendingExpression:(nonnull NSExpression *)expression {
|
||
NSExpression *subexpression = [NSExpression expressionForAggregate:@[self, expression]];
|
||
return [NSExpression expressionForFunction:@"mgl_join:" arguments:@[subexpression]];
|
||
}
|
||
|
||
static NSDictionary<NSString *, NSString *> *MGLFunctionNamesByExpressionOperator;
|
||
static NSDictionary<NSString *, NSString *> *MGLExpressionOperatorsByFunctionNames;
|
||
|
||
NSArray *MGLSubexpressionsWithJSONObjects(NSArray *objects) {
|
||
NSMutableArray *subexpressions = [NSMutableArray arrayWithCapacity:objects.count];
|
||
for (id object in objects) {
|
||
NSExpression *expression = [NSExpression expressionWithMGLJSONObject:object];
|
||
[subexpressions addObject:expression];
|
||
}
|
||
return subexpressions;
|
||
}
|
||
|
||
+ (instancetype)expressionWithMGLJSONObject:(id)object {
|
||
static dispatch_once_t onceToken;
|
||
dispatch_once(&onceToken, ^{
|
||
MGLFunctionNamesByExpressionOperator = @{
|
||
@"+": @"add:to:",
|
||
@"-": @"from:subtract:",
|
||
@"*": @"multiply:by:",
|
||
@"/": @"divide:by:",
|
||
@"%": @"modulus:by:",
|
||
@"sqrt": @"sqrt:",
|
||
@"log10": @"log:",
|
||
@"ln": @"ln:",
|
||
@"abs": @"abs:",
|
||
@"round": @"mgl_round:",
|
||
@"acos" : @"mgl_acos:",
|
||
@"cos" : @"mgl_cos:",
|
||
@"asin" : @"mgl_asin:",
|
||
@"sin" : @"mgl_sin:",
|
||
@"atan" : @"mgl_atan:",
|
||
@"tan" : @"mgl_tan:",
|
||
@"log2" : @"mgl_log2:",
|
||
@"floor": @"floor:",
|
||
@"ceil": @"ceiling:",
|
||
@"^": @"raise:toPower:",
|
||
@"upcase": @"uppercase:",
|
||
@"downcase": @"lowercase:",
|
||
@"let": @"MGL_LET",
|
||
};
|
||
});
|
||
|
||
if (!object || object == [NSNull null]) {
|
||
return [NSExpression expressionForConstantValue:nil];
|
||
}
|
||
|
||
if ([object isKindOfClass:[NSString class]] ||
|
||
[object isKindOfClass:[NSNumber class]] ||
|
||
[object isKindOfClass:[NSValue class]] ||
|
||
[object isKindOfClass:[MGLColor class]]) {
|
||
return [NSExpression expressionForConstantValue:object];
|
||
}
|
||
|
||
if ([object isKindOfClass:[NSDictionary class]]) {
|
||
NSMutableDictionary *dictionary = [NSMutableDictionary dictionaryWithCapacity:[object count]];
|
||
[object enumerateKeysAndObjectsUsingBlock:^(id _Nonnull key, id _Nonnull obj, BOOL * _Nonnull stop) {
|
||
dictionary[key] = [NSExpression expressionWithMGLJSONObject:obj];
|
||
}];
|
||
return [NSExpression expressionForConstantValue:dictionary];
|
||
}
|
||
|
||
if ([object isKindOfClass:[NSArray class]]) {
|
||
NSArray *array = (NSArray *)object;
|
||
NSString *op = array.firstObject;
|
||
|
||
if (![op isKindOfClass:[NSString class]]) {
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(array);
|
||
return [NSExpression expressionForFunction:@"MGL_FUNCTION" arguments:subexpressions];
|
||
}
|
||
|
||
NSArray *argumentObjects = [array subarrayWithRange:NSMakeRange(1, array.count - 1)];
|
||
|
||
NSString *functionName = MGLFunctionNamesByExpressionOperator[op];
|
||
if (functionName) {
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(argumentObjects);
|
||
if ([op isEqualToString:@"+"] && argumentObjects.count > 2) {
|
||
NSExpression *subexpression = [NSExpression expressionForAggregate:subexpressions];
|
||
return [NSExpression expressionForFunction:@"sum:"
|
||
arguments:@[subexpression]];
|
||
} else if ([op isEqualToString:@"^"] && [argumentObjects.firstObject isEqual:@[@"e"]]) {
|
||
functionName = @"exp:";
|
||
subexpressions = [subexpressions subarrayWithRange:NSMakeRange(1, subexpressions.count - 1)];
|
||
}
|
||
|
||
return [NSExpression expressionForFunction:functionName
|
||
arguments:subexpressions];
|
||
} else if ([op isEqualToString:@"collator"]) {
|
||
// Avoid wrapping collator options object in literal expression.
|
||
return [NSExpression expressionForFunction:@"MGL_FUNCTION" arguments:array];
|
||
} else if ([op isEqualToString:@"literal"]) {
|
||
if ([argumentObjects.firstObject isKindOfClass:[NSArray class]]) {
|
||
return [NSExpression expressionForAggregate:MGLSubexpressionsWithJSONObjects(argumentObjects.firstObject)];
|
||
}
|
||
return [NSExpression expressionWithMGLJSONObject:argumentObjects.firstObject];
|
||
} else if ([op isEqualToString:@"to-boolean"]) {
|
||
NSExpression *operand = [NSExpression expressionWithMGLJSONObject:argumentObjects.firstObject];
|
||
return [NSExpression expressionForFunction:operand selectorName:@"boolValue" arguments:@[]];
|
||
} else if ([op isEqualToString:@"to-number"] || [op isEqualToString:@"number"]) {
|
||
NSExpression *operand = [NSExpression expressionWithMGLJSONObject:argumentObjects.firstObject];
|
||
if (argumentObjects.count == 1) {
|
||
return [NSExpression expressionWithFormat:@"CAST(%@, 'NSNumber')", operand];
|
||
}
|
||
argumentObjects = [argumentObjects subarrayWithRange:NSMakeRange(1, argumentObjects.count - 1)];
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(argumentObjects);
|
||
return [NSExpression expressionForFunction:operand selectorName:@"mgl_numberWithFallbackValues:" arguments:subexpressions];
|
||
} else if ([op isEqualToString:@"to-string"] || [op isEqualToString:@"string"]) {
|
||
NSExpression *operand = [NSExpression expressionWithMGLJSONObject:argumentObjects.firstObject];
|
||
return [NSExpression expressionWithFormat:@"CAST(%@, 'NSString')", operand];
|
||
} else if ([op isEqualToString:@"to-color"]) {
|
||
NSExpression *operand = [NSExpression expressionWithMGLJSONObject:argumentObjects.firstObject];
|
||
|
||
if (argumentObjects.count == 1) {
|
||
#if TARGET_OS_IPHONE
|
||
return [NSExpression expressionWithFormat:@"CAST(%@, 'UIColor')", operand];
|
||
#else
|
||
return [NSExpression expressionWithFormat:@"CAST(%@, 'NSColor')", operand];
|
||
#endif
|
||
}
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(array);
|
||
return [NSExpression expressionForFunction:@"MGL_FUNCTION" arguments:subexpressions];
|
||
|
||
} else if ([op isEqualToString:@"to-rgba"]) {
|
||
NSExpression *operand = [NSExpression expressionWithMGLJSONObject:argumentObjects.firstObject];
|
||
return [NSExpression expressionWithFormat:@"CAST(noindex(%@), 'NSArray')", operand];
|
||
} else if ([op isEqualToString:@"get"]) {
|
||
if (argumentObjects.count == 2) {
|
||
NSExpression *operand = [NSExpression expressionWithMGLJSONObject:argumentObjects.lastObject];
|
||
if ([argumentObjects.firstObject isKindOfClass:[NSString class]]) {
|
||
return [NSExpression expressionWithFormat:@"%@.%K", operand, argumentObjects.firstObject];
|
||
}
|
||
NSExpression *key = [NSExpression expressionWithMGLJSONObject:argumentObjects.firstObject];
|
||
return [NSExpression expressionWithFormat:@"%@.%@", operand, key];
|
||
}
|
||
return [NSExpression expressionForKeyPath:argumentObjects.firstObject];
|
||
} else if ([op isEqualToString:@"length"]) {
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(argumentObjects);
|
||
NSString *function = @"count:";
|
||
if ([subexpressions.firstObject expressionType] == NSConstantValueExpressionType
|
||
&& [[subexpressions.firstObject constantValue] isKindOfClass:[NSString class]]) {
|
||
function = @"length:";
|
||
}
|
||
return [NSExpression expressionForFunction:function arguments:@[subexpressions.firstObject]];
|
||
} else if ([op isEqualToString:@"rgb"]) {
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(argumentObjects);
|
||
return [NSExpression mgl_expressionForRGBComponents:subexpressions];
|
||
} else if ([op isEqualToString:@"rgba"]) {
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(argumentObjects);
|
||
return [NSExpression mgl_expressionForRGBAComponents:subexpressions];
|
||
} else if ([op isEqualToString:@"min"]) {
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(argumentObjects);
|
||
NSExpression *subexpression = [NSExpression expressionForAggregate:subexpressions];
|
||
return [NSExpression expressionForFunction:@"min:" arguments:@[subexpression]];
|
||
} else if ([op isEqualToString:@"max"]) {
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(argumentObjects);
|
||
NSExpression *subexpression = [NSExpression expressionForAggregate:subexpressions];
|
||
return [NSExpression expressionForFunction:@"max:" arguments:@[subexpression]];
|
||
} else if ([op isEqualToString:@"e"]) {
|
||
return [NSExpression expressionForConstantValue:@(M_E)];
|
||
} else if ([op isEqualToString:@"pi"]) {
|
||
return [NSExpression expressionForConstantValue:@(M_PI)];
|
||
} else if ([op isEqualToString:@"concat"]) {
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(argumentObjects);
|
||
NSExpression *subexpression = [NSExpression expressionForAggregate:subexpressions];
|
||
return [NSExpression expressionForFunction:@"mgl_join:" arguments:@[subexpression]];
|
||
} else if ([op isEqualToString:@"at"]) {
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(argumentObjects);
|
||
NSExpression *index = subexpressions.firstObject;
|
||
NSExpression *operand = subexpressions[1];
|
||
return [NSExpression expressionForFunction:@"objectFrom:withIndex:" arguments:@[operand, index]];
|
||
} else if ([op isEqualToString:@"has"]) {
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(argumentObjects);
|
||
NSExpression *operand = argumentObjects.count > 1 ? subexpressions[1] : [NSExpression expressionForEvaluatedObject];
|
||
NSExpression *key = subexpressions.firstObject;
|
||
return [NSExpression expressionForFunction:@"mgl_does:have:" arguments:@[operand, key]];
|
||
} else if ([op isEqualToString:@"interpolate"]) {
|
||
NSArray *interpolationOptions = argumentObjects.firstObject;
|
||
NSString *curveType = interpolationOptions.firstObject;
|
||
NSExpression *curveTypeExpression = [NSExpression expressionWithMGLJSONObject:curveType];
|
||
id curveParameters;
|
||
if ([curveType isEqual:@"exponential"]) {
|
||
curveParameters = interpolationOptions[1];
|
||
} else if ([curveType isEqualToString:@"cubic-bezier"]) {
|
||
curveParameters = @[@"literal", [interpolationOptions subarrayWithRange:NSMakeRange(1, 4)]];
|
||
}
|
||
NSExpression *curveParameterExpression = [NSExpression expressionWithMGLJSONObject:curveParameters];
|
||
argumentObjects = [argumentObjects subarrayWithRange:NSMakeRange(1, argumentObjects.count - 1)];
|
||
NSExpression *inputExpression = [NSExpression expressionWithMGLJSONObject:argumentObjects.firstObject];
|
||
NSArray *stopExpressions = [argumentObjects subarrayWithRange:NSMakeRange(1, argumentObjects.count - 1)];
|
||
NSMutableDictionary *stops = [NSMutableDictionary dictionaryWithCapacity:stopExpressions.count / 2];
|
||
NSEnumerator *stopEnumerator = stopExpressions.objectEnumerator;
|
||
while (NSNumber *key = stopEnumerator.nextObject) {
|
||
NSExpression *valueExpression = stopEnumerator.nextObject;
|
||
stops[key] = [NSExpression expressionWithMGLJSONObject:valueExpression];
|
||
}
|
||
NSExpression *stopExpression = [NSExpression expressionForConstantValue:stops];
|
||
return [NSExpression expressionForFunction:@"mgl_interpolate:withCurveType:parameters:stops:"
|
||
arguments:@[inputExpression, curveTypeExpression, curveParameterExpression, stopExpression]];
|
||
} else if ([op isEqualToString:@"step"]) {
|
||
NSExpression *inputExpression = [NSExpression expressionWithMGLJSONObject:argumentObjects[0]];
|
||
NSArray *stopExpressions = [argumentObjects subarrayWithRange:NSMakeRange(1, argumentObjects.count - 1)];
|
||
NSExpression *minimum;
|
||
if (stopExpressions.count % 2) {
|
||
minimum = [NSExpression expressionWithMGLJSONObject:stopExpressions.firstObject];
|
||
stopExpressions = [stopExpressions subarrayWithRange:NSMakeRange(1, stopExpressions.count - 1)];
|
||
}
|
||
NSMutableDictionary *stops = [NSMutableDictionary dictionaryWithCapacity:stopExpressions.count / 2];
|
||
NSEnumerator *stopEnumerator = stopExpressions.objectEnumerator;
|
||
while (NSNumber *key = stopEnumerator.nextObject) {
|
||
NSExpression *valueExpression = stopEnumerator.nextObject;
|
||
if (minimum) {
|
||
stops[key] = [NSExpression expressionWithMGLJSONObject:valueExpression];
|
||
} else {
|
||
minimum = [NSExpression expressionWithMGLJSONObject:valueExpression];
|
||
}
|
||
}
|
||
NSExpression *stopExpression = [NSExpression expressionForConstantValue:stops];
|
||
return [NSExpression expressionForFunction:@"mgl_step:from:stops:"
|
||
arguments:@[inputExpression, minimum, stopExpression]];
|
||
} else if ([op isEqualToString:@"zoom"]) {
|
||
return NSExpression.zoomLevelVariableExpression;
|
||
} else if ([op isEqualToString:@"heatmap-density"]) {
|
||
return NSExpression.heatmapDensityVariableExpression;
|
||
} else if ([op isEqualToString:@"line-progress"]) {
|
||
return NSExpression.lineProgressVariableExpression;
|
||
} else if ([op isEqualToString:@"geometry-type"]) {
|
||
return NSExpression.geometryTypeVariableExpression;
|
||
} else if ([op isEqualToString:@"id"]) {
|
||
return NSExpression.featureIdentifierVariableExpression;
|
||
} else if ([op isEqualToString:@"properties"]) {
|
||
return NSExpression.featureAttributesVariableExpression;
|
||
} else if ([op isEqualToString:@"var"]) {
|
||
return [NSExpression expressionForVariable:argumentObjects.firstObject];
|
||
} else if ([op isEqualToString:@"case"]) {
|
||
NSMutableArray *arguments = [NSMutableArray array];
|
||
|
||
for (NSUInteger index = 0; index < argumentObjects.count; index++) {
|
||
if (index % 2 == 0 && index != argumentObjects.count - 1) {
|
||
NSPredicate *predicate = [NSPredicate predicateWithMGLJSONObject:argumentObjects[index]];
|
||
NSExpression *argument = [NSExpression expressionForConstantValue:predicate];
|
||
[arguments addObject:argument];
|
||
} else {
|
||
[arguments addObject:[NSExpression expressionWithMGLJSONObject:argumentObjects[index]]];
|
||
}
|
||
}
|
||
|
||
if (arguments.count == 3) {
|
||
NSPredicate *conditional = [arguments.firstObject constantValue];
|
||
return [NSExpression expressionForConditional:conditional trueExpression:arguments[1] falseExpression:arguments[2]];
|
||
}
|
||
return [NSExpression expressionForFunction:@"MGL_IF" arguments:arguments];
|
||
} else if ([op isEqualToString:@"match"]) {
|
||
NSMutableArray *optionsArray = [NSMutableArray array];
|
||
|
||
for (NSUInteger index = 0; index < argumentObjects.count; index++) {
|
||
NSExpression *option = [NSExpression expressionWithMGLJSONObject:argumentObjects[index]];
|
||
// match operators with arrays as matching values should not parse arrays as generic functions.
|
||
if (index > 0 && index < argumentObjects.count - 1 && !(index % 2 == 0) && [argumentObjects[index] isKindOfClass:[NSArray class]]) {
|
||
option = [NSExpression expressionForAggregate:MGLSubexpressionsWithJSONObjects(argumentObjects[index])];
|
||
}
|
||
[optionsArray addObject:option];
|
||
}
|
||
|
||
return [NSExpression expressionForFunction:@"MGL_MATCH"
|
||
arguments:optionsArray];
|
||
} else if ([op isEqualToString:@"coalesce"]) {
|
||
NSMutableArray *expressions = [NSMutableArray array];
|
||
for (id operand in argumentObjects) {
|
||
[expressions addObject:[NSExpression expressionWithMGLJSONObject:operand]];
|
||
}
|
||
|
||
return [NSExpression expressionWithFormat:@"mgl_coalesce(%@)", expressions];
|
||
} else {
|
||
NSArray *subexpressions = MGLSubexpressionsWithJSONObjects(array);
|
||
return [NSExpression expressionForFunction:@"MGL_FUNCTION" arguments:subexpressions];
|
||
}
|
||
}
|
||
|
||
[NSException raise:NSInvalidArgumentException
|
||
format:@"Unable to convert JSON object %@ to an NSExpression.", object];
|
||
|
||
return nil;
|
||
}
|
||
|
||
- (id)mgl_jsonExpressionObject {
|
||
static dispatch_once_t onceToken;
|
||
dispatch_once(&onceToken, ^{
|
||
MGLExpressionOperatorsByFunctionNames = @{
|
||
@"add:to:": @"+",
|
||
@"from:subtract:": @"-",
|
||
@"multiply:by:": @"*",
|
||
@"divide:by:": @"/",
|
||
@"modulus:by:": @"%",
|
||
@"sqrt:": @"sqrt",
|
||
@"log:": @"log10",
|
||
@"ln:": @"ln",
|
||
@"raise:toPower:": @"^",
|
||
@"ceiling:": @"ceil",
|
||
@"abs:": @"abs",
|
||
@"floor:": @"floor",
|
||
@"uppercase:": @"upcase",
|
||
@"lowercase:": @"downcase",
|
||
@"length:": @"length",
|
||
@"mgl_round:": @"round",
|
||
@"mgl_acos:" : @"acos",
|
||
@"mgl_cos:" : @"cos",
|
||
@"mgl_asin:" : @"asin",
|
||
@"mgl_sin:" : @"sin",
|
||
@"mgl_atan:" : @"atan",
|
||
@"mgl_tan:" : @"tan",
|
||
@"mgl_log2:" : @"log2",
|
||
// Vararg aftermarket expressions need to be declared with an explicit and implicit first argument.
|
||
@"MGL_LET": @"let",
|
||
@"MGL_LET:": @"let",
|
||
};
|
||
});
|
||
|
||
switch (self.expressionType) {
|
||
case NSVariableExpressionType: {
|
||
if ([self.variable isEqualToString:@"heatmapDensity"]) {
|
||
return @[@"heatmap-density"];
|
||
}
|
||
if ([self.variable isEqualToString:@"lineProgress"]) {
|
||
return @[@"line-progress"];
|
||
}
|
||
if ([self.variable isEqualToString:@"zoomLevel"]) {
|
||
return @[@"zoom"];
|
||
}
|
||
if ([self.variable isEqualToString:@"geometryType"]) {
|
||
return @[@"geometry-type"];
|
||
}
|
||
if ([self.variable isEqualToString:@"featureIdentifier"]) {
|
||
return @[@"id"];
|
||
}
|
||
if ([self.variable isEqualToString:@"featureAttributes"]) {
|
||
return @[@"properties"];
|
||
}
|
||
return @[@"var", self.variable];
|
||
}
|
||
|
||
case NSConstantValueExpressionType: {
|
||
id constantValue = self.constantValue;
|
||
if (!constantValue || constantValue == [NSNull null]) {
|
||
return [NSNull null];
|
||
}
|
||
if ([constantValue isEqual:@(M_E)]) {
|
||
return @[@"e"];
|
||
}
|
||
if ([constantValue isEqual:@(M_PI)]) {
|
||
return @[@"pi"];
|
||
}
|
||
if ([constantValue isKindOfClass:[NSArray class]] ||
|
||
[constantValue isKindOfClass:[NSDictionary class]]) {
|
||
NSArray *collection = [constantValue mgl_jsonExpressionObject];
|
||
return @[@"literal", collection];
|
||
}
|
||
if ([constantValue isKindOfClass:[MGLColor class]]) {
|
||
auto color = [constantValue mgl_color];
|
||
if (color.a == 1) {
|
||
return @[@"rgb", @(color.r * 255), @(color.g * 255), @(color.b * 255)];
|
||
}
|
||
return @[@"rgba", @(color.r * 255), @(color.g * 255), @(color.b * 255), @(color.a)];
|
||
}
|
||
if ([constantValue isKindOfClass:[NSValue class]]) {
|
||
const auto boxedValue = (NSValue *)constantValue;
|
||
if (strcmp([boxedValue objCType], @encode(CGVector)) == 0) {
|
||
// offset [x, y]
|
||
std::array<float, 2> mglValue = boxedValue.mgl_offsetArrayValue;
|
||
return @[@"literal", @[@(mglValue[0]), @(mglValue[1])]];
|
||
}
|
||
if (strcmp([boxedValue objCType], @encode(MGLEdgeInsets)) == 0) {
|
||
// padding [x, y]
|
||
std::array<float, 4> mglValue = boxedValue.mgl_paddingArrayValue;
|
||
return @[@"literal", @[@(mglValue[0]), @(mglValue[1]), @(mglValue[2]), @(mglValue[3])]];
|
||
}
|
||
}
|
||
return self.constantValue;
|
||
}
|
||
|
||
case NSKeyPathExpressionType: {
|
||
NSArray *expressionObject;
|
||
NSArray *keyPath = [self.keyPath componentsSeparatedByString:@"."];
|
||
for (NSString *pathComponent in keyPath) {
|
||
if (expressionObject) {
|
||
expressionObject = @[@"get", pathComponent, expressionObject];
|
||
} else {
|
||
expressionObject = @[@"get", pathComponent];
|
||
}
|
||
}
|
||
return expressionObject;
|
||
}
|
||
|
||
case NSFunctionExpressionType: {
|
||
NSString *function = self.function;
|
||
NSString *op = MGLExpressionOperatorsByFunctionNames[function];
|
||
if (op) {
|
||
NSArray *arguments = self.arguments.mgl_jsonExpressionObject;
|
||
return [@[op] arrayByAddingObjectsFromArray:arguments];
|
||
} else if ([function isEqualToString:@"valueForKey:"] || [function isEqualToString:@"valueForKeyPath:"]) {
|
||
return @[@"get", self.arguments.firstObject.mgl_jsonExpressionObject, self.operand.mgl_jsonExpressionObject];
|
||
} else if ([function isEqualToString:@"average:"]) {
|
||
NSExpression *sum = [NSExpression expressionForFunction:@"sum:" arguments:self.arguments];
|
||
NSExpression *count = [NSExpression expressionForFunction:@"count:" arguments:self.arguments];
|
||
return [NSExpression expressionForFunction:@"divide:by:" arguments:@[sum, count]].mgl_jsonExpressionObject;
|
||
} else if ([function isEqualToString:@"sum:"]) {
|
||
NSArray *arguments = [self.arguments.firstObject.collection valueForKeyPath:@"mgl_jsonExpressionObject"];
|
||
return [@[@"+"] arrayByAddingObjectsFromArray:arguments];
|
||
} else if ([function isEqualToString:@"count:"]) {
|
||
NSArray *arguments = self.arguments.firstObject.mgl_jsonExpressionObject;
|
||
return @[@"length", arguments];
|
||
} else if ([function isEqualToString:@"min:"]) {
|
||
NSArray *arguments = [self.arguments.firstObject.collection valueForKeyPath:@"mgl_jsonExpressionObject"];
|
||
return [@[@"min"] arrayByAddingObjectsFromArray:arguments];
|
||
} else if ([function isEqualToString:@"max:"]) {
|
||
NSArray *arguments = [self.arguments.firstObject.collection valueForKeyPath:@"mgl_jsonExpressionObject"];
|
||
return [@[@"max"] arrayByAddingObjectsFromArray:arguments];
|
||
} else if ([function isEqualToString:@"exp:"]) {
|
||
return [NSExpression expressionForFunction:@"raise:toPower:" arguments:@[@(M_E), self.arguments.firstObject]].mgl_jsonExpressionObject;
|
||
} else if ([function isEqualToString:@"trunc:"]) {
|
||
return [NSExpression expressionWithFormat:@"%@ - modulus:by:(%@, 1)",
|
||
self.arguments.firstObject, self.arguments.firstObject].mgl_jsonExpressionObject;
|
||
} else if ([function isEqualToString:@"mgl_join:"]) {
|
||
NSArray *arguments = [self.arguments.firstObject.collection valueForKeyPath:@"mgl_jsonExpressionObject"];
|
||
return [@[@"concat"] arrayByAddingObjectsFromArray:arguments];
|
||
} else if ([function isEqualToString:@"stringByAppendingString:"]) {
|
||
NSArray *arguments = self.arguments.mgl_jsonExpressionObject;
|
||
return [@[@"concat", self.operand.mgl_jsonExpressionObject] arrayByAddingObjectsFromArray:arguments];
|
||
} else if ([function isEqualToString:@"objectFrom:withIndex:"]) {
|
||
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"]) {
|
||
index = [NSExpression expressionWithFormat:@"count(%@) - 1", self.arguments[0]].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"] ||
|
||
[function isEqualToString:@"mgl_numberWithFallbackValues:"] ||
|
||
[function isEqualToString:@"decimalValue"] ||
|
||
[function isEqualToString:@"floatValue"] ||
|
||
[function isEqualToString:@"doubleValue"]) {
|
||
NSArray *arguments = self.arguments.mgl_jsonExpressionObject;
|
||
return [@[@"to-number", self.operand.mgl_jsonExpressionObject] arrayByAddingObjectsFromArray:arguments];
|
||
} else if ([function isEqualToString:@"stringValue"]) {
|
||
return @[@"to-string", self.operand.mgl_jsonExpressionObject];
|
||
} else if ([function isEqualToString:@"noindex:"]) {
|
||
return self.arguments.firstObject.mgl_jsonExpressionObject;
|
||
} else if ([function isEqualToString:@"mgl_does:have:"] ||
|
||
[function isEqualToString:@"mgl_has:"]) {
|
||
return self.mgl_jsonHasExpressionObject;
|
||
} else if ([function isEqualToString:@"mgl_interpolate:withCurveType:parameters:stops:"]
|
||
|| [function isEqualToString:@"mgl_interpolateWithCurveType:parameters:stops:"]) {
|
||
return self.mgl_jsonInterpolationExpressionObject;
|
||
} else if ([function isEqualToString:@"mgl_step:from:stops:"]
|
||
|| [function isEqualToString:@"mgl_stepWithMinimum:stops:"]) {
|
||
return self.mgl_jsonStepExpressionObject;
|
||
} else if ([function isEqualToString:@"mgl_expressionWithContext:"]) {
|
||
id context = self.arguments.firstObject;
|
||
if ([context isKindOfClass:[NSExpression class]]) {
|
||
context = [context constantValue];
|
||
}
|
||
NSMutableArray *expressionObject = [NSMutableArray arrayWithObjects:@"let", nil];
|
||
[context enumerateKeysAndObjectsUsingBlock:^(id _Nonnull key, NSExpression * _Nonnull obj, BOOL * _Nonnull stop) {
|
||
[expressionObject addObject:key];
|
||
[expressionObject addObject:obj.mgl_jsonExpressionObject];
|
||
}];
|
||
[expressionObject addObject:self.operand.mgl_jsonExpressionObject];
|
||
return expressionObject;
|
||
} else if ([function isEqualToString:@"MGL_IF"] ||
|
||
[function isEqualToString:@"MGL_IF:"] ||
|
||
[function isEqualToString:@"mgl_if:"]) {
|
||
return self.mgl_jsonIfExpressionObject;
|
||
} else if ([function isEqualToString:@"MGL_MATCH"] ||
|
||
[function isEqualToString:@"MGL_MATCH:"] ||
|
||
[function isEqualToString:@"mgl_match:"]) {
|
||
return self.mgl_jsonMatchExpressionObject;
|
||
} else if ([function isEqualToString:@"mgl_coalesce:"] ||
|
||
[function isEqualToString:@"mgl_coalesce"]) {
|
||
|
||
return self.mgl_jsonCoalesceExpressionObject;
|
||
} else if ([function isEqualToString:@"castObject:toType:"]) {
|
||
id object = self.arguments.firstObject.mgl_jsonExpressionObject;
|
||
NSString *type = self.arguments[1].mgl_jsonExpressionObject;
|
||
if ([type isEqualToString:@"NSString"]) {
|
||
return @[@"to-string", object];
|
||
} else if ([type isEqualToString:@"NSNumber"]) {
|
||
return @[@"to-number", object];
|
||
}
|
||
#if TARGET_OS_IPHONE
|
||
else if ([type isEqualToString:@"UIColor"] || [type isEqualToString:@"MGLColor"]) {
|
||
return @[@"to-color", object];
|
||
}
|
||
#else
|
||
else if ([type isEqualToString:@"NSColor"] || [type isEqualToString:@"MGLColor"]) {
|
||
return @[@"to-color", object];
|
||
}
|
||
#endif
|
||
else if ([type isEqualToString:@"NSArray"]) {
|
||
NSExpression *operand = self.arguments.firstObject;
|
||
if ([operand expressionType] == NSFunctionExpressionType ) {
|
||
operand = self.arguments.firstObject.arguments.firstObject;
|
||
}
|
||
if (([operand expressionType] != NSConstantValueExpressionType) ||
|
||
([operand expressionType] == NSConstantValueExpressionType &&
|
||
[[operand constantValue] isKindOfClass:[MGLColor class]])) {
|
||
return @[@"to-rgba", object];
|
||
}
|
||
}
|
||
[NSException raise:NSInvalidArgumentException
|
||
format:@"Casting expression to %@ not yet implemented.", type];
|
||
} else if ([function isEqualToString:@"MGL_FUNCTION"] ||
|
||
[function isEqualToString:@"MGL_FUNCTION:"]) {
|
||
NSExpression *firstOp = self.arguments.firstObject;
|
||
if (firstOp.expressionType == NSConstantValueExpressionType
|
||
&& [firstOp.constantValue isEqualToString:@"collator"]) {
|
||
// Avoid wrapping collator options object in literal expression.
|
||
return @[@"collator", self.arguments[1].constantValue];
|
||
}
|
||
if (firstOp.expressionType == NSConstantValueExpressionType
|
||
&& [firstOp.constantValue isEqualToString:@"format"]) {
|
||
// Avoid wrapping format options object in literal expression.
|
||
return @[@"format", self.arguments[1].mgl_jsonExpressionObject, self.arguments[2].constantValue];
|
||
}
|
||
return self.arguments.mgl_jsonExpressionObject;
|
||
} else if (op == [MGLColor class] && [function isEqualToString:@"colorWithRed:green:blue:alpha:"]) {
|
||
NSArray *arguments = self.arguments.mgl_jsonExpressionObject;
|
||
return [@[@"rgba"] arrayByAddingObjectsFromArray:arguments];
|
||
} else if ([function isEqualToString:@"median:"] ||
|
||
[function isEqualToString:@"mode:"] ||
|
||
[function isEqualToString:@"stddev:"] ||
|
||
[function isEqualToString:@"random"] ||
|
||
[function isEqualToString:@"randomn:"] ||
|
||
[function isEqualToString:@"now"] ||
|
||
[function isEqualToString:@"bitwiseAnd:with:"] ||
|
||
[function isEqualToString:@"bitwiseOr:with:"] ||
|
||
[function isEqualToString:@"bitwiseXor:with:"] ||
|
||
[function isEqualToString:@"leftshift:by:"] ||
|
||
[function isEqualToString:@"rightshift:by:"] ||
|
||
[function isEqualToString:@"onesComplement:"] ||
|
||
[function isEqualToString:@"distanceToLocation:fromLocation:"]) {
|
||
[NSException raise:NSInvalidArgumentException
|
||
format:@"Expression function %@ not yet implemented.", function];
|
||
return nil;
|
||
} else {
|
||
[NSException raise:NSInvalidArgumentException
|
||
format:@"Unrecognized expression function %@.", function];
|
||
return nil;
|
||
}
|
||
}
|
||
|
||
case NSConditionalExpressionType: {
|
||
NSMutableArray *arguments = [NSMutableArray arrayWithObjects:self.predicate.mgl_jsonExpressionObject, nil];
|
||
|
||
if (self.trueExpression.expressionType == NSConditionalExpressionType) {
|
||
// Fold nested conditionals into a single case expression.
|
||
NSArray *trueArguments = self.trueExpression.mgl_jsonExpressionObject;
|
||
trueArguments = [trueArguments subarrayWithRange:NSMakeRange(1, trueArguments.count - 1)];
|
||
[arguments addObjectsFromArray:trueArguments];
|
||
} else {
|
||
[arguments addObject:self.trueExpression.mgl_jsonExpressionObject];
|
||
}
|
||
|
||
if (self.falseExpression.expressionType == NSConditionalExpressionType) {
|
||
// Fold nested conditionals into a single case expression.
|
||
NSArray *falseArguments = self.falseExpression.mgl_jsonExpressionObject;
|
||
falseArguments = [falseArguments subarrayWithRange:NSMakeRange(1, falseArguments.count - 1)];
|
||
[arguments addObjectsFromArray:falseArguments];
|
||
} else {
|
||
[arguments addObject:self.falseExpression.mgl_jsonExpressionObject];
|
||
}
|
||
|
||
[arguments insertObject:@"case" atIndex:0];
|
||
return arguments;
|
||
}
|
||
|
||
case NSAggregateExpressionType: {
|
||
NSArray *collection = [self.collection valueForKeyPath:@"mgl_jsonExpressionObject"];
|
||
return @[@"literal", collection];
|
||
}
|
||
|
||
case NSEvaluatedObjectExpressionType:
|
||
case NSUnionSetExpressionType:
|
||
case NSIntersectSetExpressionType:
|
||
case NSMinusSetExpressionType:
|
||
case NSSubqueryExpressionType:
|
||
case NSAnyKeyExpressionType:
|
||
case NSBlockExpressionType:
|
||
[NSException raise:NSInvalidArgumentException
|
||
format:@"Expression type %lu not yet implemented.", (unsigned long)self.expressionType];
|
||
}
|
||
|
||
// NSKeyPathSpecifierExpression
|
||
if (self.expressionType == 10) {
|
||
return self.description;
|
||
}
|
||
// An assignment expression type is present in the BNF grammar, but the
|
||
// corresponding NSExpressionType value and property getters are missing.
|
||
if (self.expressionType == 12) {
|
||
[NSException raise:NSInvalidArgumentException
|
||
format:@"Assignment expressions not yet implemented."];
|
||
}
|
||
|
||
return nil;
|
||
}
|
||
|
||
- (id)mgl_jsonInterpolationExpressionObject {
|
||
NSUInteger expectedArgumentCount = [self.function componentsSeparatedByString:@":"].count - 1;
|
||
if (self.arguments.count < expectedArgumentCount) {
|
||
[NSException raise:NSInvalidArgumentException format:
|
||
@"Too few arguments to ‘%@’ function; expected %lu arguments.",
|
||
self.function, (unsigned long)expectedArgumentCount];
|
||
} else if (self.arguments.count > expectedArgumentCount) {
|
||
[NSException raise:NSInvalidArgumentException format:
|
||
@"%lu unexpected arguments to ‘%@’ function; expected %lu arguments.",
|
||
self.arguments.count - (unsigned long)expectedArgumentCount, self.function, (unsigned long)expectedArgumentCount];
|
||
}
|
||
|
||
BOOL isAftermarketFunction = [self.function isEqualToString:@"mgl_interpolate:withCurveType:parameters:stops:"];
|
||
NSUInteger curveTypeIndex = isAftermarketFunction ? 1 : 0;
|
||
NSString *curveType = self.arguments[curveTypeIndex].constantValue;
|
||
NSMutableArray *interpolationArray = [NSMutableArray arrayWithObject:curveType];
|
||
if ([curveType isEqualToString:@"exponential"]) {
|
||
id base = [self.arguments[curveTypeIndex + 1] mgl_jsonExpressionObject];
|
||
[interpolationArray addObject:base];
|
||
} else if ([curveType isEqualToString:@"cubic-bezier"]) {
|
||
NSArray *controlPoints = [self.arguments[curveTypeIndex + 1].collection mgl_jsonExpressionObject];
|
||
[interpolationArray addObjectsFromArray:controlPoints];
|
||
}
|
||
|
||
NSDictionary<NSNumber *, NSExpression *> *stops = self.arguments[curveTypeIndex + 2].constantValue;
|
||
|
||
if (stops.count == 0) {
|
||
[NSException raise:NSInvalidArgumentException format:@"‘stops’ dictionary argument to ‘%@’ function must not be empty.", self.function];
|
||
}
|
||
|
||
NSMutableArray *expressionObject = [NSMutableArray arrayWithObjects:@"interpolate", interpolationArray, nil];
|
||
[expressionObject addObject:(isAftermarketFunction ? self.arguments.firstObject : self.operand).mgl_jsonExpressionObject];
|
||
for (NSNumber *key in [stops.allKeys sortedArrayUsingSelector:@selector(compare:)]) {
|
||
[expressionObject addObject:key];
|
||
[expressionObject addObject:[stops[key] mgl_jsonExpressionObject]];
|
||
}
|
||
return expressionObject;
|
||
}
|
||
|
||
- (id)mgl_jsonStepExpressionObject {
|
||
BOOL isAftermarketFunction = [self.function isEqualToString:@"mgl_step:from:stops:"];
|
||
NSUInteger minimumIndex = isAftermarketFunction ? 1 : 0;
|
||
id minimum = self.arguments[minimumIndex].mgl_jsonExpressionObject;
|
||
NSDictionary<NSNumber *, NSExpression *> *stops = self.arguments[minimumIndex + 1].constantValue;
|
||
|
||
if (stops.count == 0) {
|
||
[NSException raise:NSInvalidArgumentException format:@"‘stops’ dictionary argument to ‘%@’ function must not be empty.", self.function];
|
||
}
|
||
|
||
NSMutableArray *expressionObject = [NSMutableArray arrayWithObjects:@"step", (isAftermarketFunction ? self.arguments.firstObject : self.operand).mgl_jsonExpressionObject, minimum, nil];
|
||
|
||
for (NSNumber *key in [stops.allKeys sortedArrayUsingSelector:@selector(compare:)]) {
|
||
[expressionObject addObject:key];
|
||
[expressionObject addObject:[stops[key] mgl_jsonExpressionObject]];
|
||
}
|
||
return expressionObject;
|
||
}
|
||
|
||
- (id)mgl_jsonMatchExpressionObject {
|
||
BOOL isAftermarketFunction = [self.function hasPrefix:@"MGL_MATCH"];
|
||
NSUInteger minimumIndex = isAftermarketFunction ? 1 : 0;
|
||
|
||
NSMutableArray *expressionObject = [NSMutableArray arrayWithObjects:@"match", (isAftermarketFunction ? self.arguments.firstObject : self.operand).mgl_jsonExpressionObject, nil];
|
||
NSArray<NSExpression *> *arguments = isAftermarketFunction ? self.arguments : self.arguments[minimumIndex].constantValue;
|
||
|
||
for (NSUInteger index = minimumIndex; index < arguments.count; index++) {
|
||
NSArray *argumentObject = arguments[index].mgl_jsonExpressionObject;
|
||
// match operators with arrays as matching values should not parse arrays using the literal operator.
|
||
if (index > 0 && index < arguments.count - 1 && !(index % 2 == 0)) {
|
||
NSExpression *expression = arguments[index];
|
||
if (![expression isKindOfClass:[NSExpression class]]) {
|
||
expression = [NSExpression expressionForConstantValue:expression];
|
||
}
|
||
if (expression.expressionType == NSAggregateExpressionType ||
|
||
(expression.expressionType == NSConstantValueExpressionType && [expression.constantValue isKindOfClass:[NSArray class]])) {
|
||
argumentObject = argumentObject.count == 2 ? argumentObject[1] : argumentObject;
|
||
}
|
||
}
|
||
[expressionObject addObject:argumentObject];
|
||
}
|
||
|
||
return expressionObject;
|
||
}
|
||
|
||
- (id)mgl_jsonIfExpressionObject {
|
||
BOOL isAftermarketFunction = [self.function hasPrefix:@"MGL_IF"];
|
||
NSUInteger minimumIndex = isAftermarketFunction ? 1 : 0;
|
||
NSExpression *firstCondition;
|
||
id condition;
|
||
|
||
if (isAftermarketFunction) {
|
||
firstCondition = self.arguments.firstObject;
|
||
} else {
|
||
firstCondition = self.operand;
|
||
}
|
||
|
||
if ([firstCondition respondsToSelector:@selector(constantValue)] && [firstCondition.constantValue isKindOfClass:[NSComparisonPredicate class]]) {
|
||
NSPredicate *predicate = (NSPredicate *)firstCondition.constantValue;
|
||
condition = predicate.mgl_jsonExpressionObject;
|
||
} else {
|
||
condition = firstCondition.mgl_jsonExpressionObject;
|
||
}
|
||
|
||
NSMutableArray *expressionObject = [NSMutableArray arrayWithObjects:@"case", condition, nil];
|
||
NSArray<NSExpression *> *arguments = isAftermarketFunction ? self.arguments : self.arguments[minimumIndex].constantValue;
|
||
|
||
for (NSUInteger index = minimumIndex; index < arguments.count; index++) {
|
||
if ([arguments[index] respondsToSelector:@selector(constantValue)] && [arguments[index].constantValue isKindOfClass:[NSComparisonPredicate class]]) {
|
||
NSPredicate *predicate = (NSPredicate *)arguments[index].constantValue;
|
||
[expressionObject addObject:predicate.mgl_jsonExpressionObject];
|
||
} else {
|
||
[expressionObject addObject:arguments[index].mgl_jsonExpressionObject];
|
||
}
|
||
}
|
||
|
||
return expressionObject;
|
||
}
|
||
|
||
- (id)mgl_jsonCoalesceExpressionObject {
|
||
BOOL isAftermarketFunction = [self.function isEqualToString:@"mgl_coalesce:"];
|
||
NSMutableArray *expressionObject = [NSMutableArray arrayWithObjects:@"coalesce", nil];
|
||
|
||
for (NSExpression *expression in (isAftermarketFunction ? self.arguments.firstObject : self.operand).constantValue) {
|
||
[expressionObject addObject:[expression mgl_jsonExpressionObject]];
|
||
}
|
||
|
||
return expressionObject;
|
||
}
|
||
|
||
- (id)mgl_jsonHasExpressionObject {
|
||
BOOL isAftermarketFunction = [self.function isEqualToString:@"mgl_does:have:"];
|
||
NSExpression *operand = isAftermarketFunction ? self.arguments[0] : self.operand;
|
||
NSExpression *key = self.arguments[isAftermarketFunction ? 1 : 0];
|
||
|
||
NSMutableArray *expressionObject = [NSMutableArray arrayWithObjects:@"has", key.mgl_jsonExpressionObject, nil];
|
||
if (operand.expressionType != NSEvaluatedObjectExpressionType) {
|
||
[expressionObject addObject:operand.mgl_jsonExpressionObject];
|
||
}
|
||
return expressionObject;
|
||
}
|
||
|
||
#pragma mark Localization
|
||
|
||
/**
|
||
Returns a localized copy of the given collection.
|
||
|
||
If no localization takes place, this method returns the original collection.
|
||
*/
|
||
NSArray<NSExpression *> *MGLLocalizedCollection(NSArray<NSExpression *> *collection, NSLocale * _Nullable locale) {
|
||
__block NSMutableArray *localizedCollection;
|
||
[collection enumerateObjectsUsingBlock:^(NSExpression * _Nonnull item, NSUInteger idx, BOOL * _Nonnull stop) {
|
||
NSExpression *localizedItem = [item mgl_expressionLocalizedIntoLocale:locale];
|
||
if (localizedItem != item) {
|
||
if (!localizedCollection) {
|
||
localizedCollection = [collection mutableCopy];
|
||
}
|
||
localizedCollection[idx] = localizedItem;
|
||
}
|
||
}];
|
||
return localizedCollection ?: collection;
|
||
};
|
||
|
||
/**
|
||
Returns a localized copy of the given stop dictionary.
|
||
|
||
If no localization takes place, this method returns the original stop
|
||
dictionary.
|
||
*/
|
||
NSDictionary<NSNumber *, NSExpression *> *MGLLocalizedStopDictionary(NSDictionary<NSNumber *, NSExpression *> *stops, NSLocale * _Nullable locale) {
|
||
__block NSMutableDictionary *localizedStops;
|
||
[stops enumerateKeysAndObjectsUsingBlock:^(id _Nonnull zoomLevel, NSExpression * _Nonnull value, BOOL * _Nonnull stop) {
|
||
if (![value isKindOfClass:[NSExpression class]]) {
|
||
value = [NSExpression expressionForConstantValue:value];
|
||
}
|
||
NSExpression *localizedValue = [value mgl_expressionLocalizedIntoLocale:locale];
|
||
if (localizedValue != value) {
|
||
if (!localizedStops) {
|
||
localizedStops = [stops mutableCopy];
|
||
}
|
||
localizedStops[zoomLevel] = localizedValue;
|
||
}
|
||
}];
|
||
return localizedStops ?: stops;
|
||
};
|
||
|
||
- (NSExpression *)mgl_expressionLocalizedIntoLocale:(nullable NSLocale *)locale {
|
||
switch (self.expressionType) {
|
||
case NSConstantValueExpressionType: {
|
||
if ([self.constantValue isKindOfClass:[NSDictionary class]]) {
|
||
NSDictionary *localizedStops = MGLLocalizedStopDictionary(self.constantValue, locale);
|
||
if (localizedStops != self.constantValue) {
|
||
return [NSExpression expressionForConstantValue:localizedStops];
|
||
}
|
||
} else if ([self.constantValue isKindOfClass:[NSArray class]]) {
|
||
NSArray *localizedValues = MGLLocalizedCollection(self.constantValue, locale);
|
||
if (localizedValues != self.constantValue) {
|
||
return [NSExpression expressionForConstantValue:localizedValues];
|
||
}
|
||
}
|
||
return self;
|
||
}
|
||
|
||
case NSKeyPathExpressionType: {
|
||
if ([self.keyPath isEqualToString:@"name"] || [self.keyPath hasPrefix:@"name_"]) {
|
||
NSString *localizedKeyPath = @"name";
|
||
if (![locale.localeIdentifier isEqualToString:@"mul"]) {
|
||
NSArray *preferences = locale ? @[locale.localeIdentifier] : [NSLocale preferredLanguages];
|
||
NSString *preferredLanguage = [MGLVectorTileSource preferredMapboxStreetsLanguageForPreferences:preferences];
|
||
if (preferredLanguage) {
|
||
localizedKeyPath = [NSString stringWithFormat:@"name_%@", preferredLanguage];
|
||
}
|
||
}
|
||
// If the keypath is `name`, no need to fallback
|
||
if ([localizedKeyPath isEqualToString:@"name"]) {
|
||
return [NSExpression expressionForKeyPath:localizedKeyPath];
|
||
}
|
||
// If the keypath is `name_zh-Hans`, fallback to `name_zh` to `name`.
|
||
// CN tiles might using `name_zh-CN` for Simplified Chinese.
|
||
if ([localizedKeyPath isEqualToString:@"name_zh-Hans"]) {
|
||
return [NSExpression expressionWithFormat:@"mgl_coalesce({%K, %K, %K, %K})",
|
||
localizedKeyPath, @"name_zh-CN", @"name_zh", @"name"];
|
||
}
|
||
// Mapbox Streets v8 has `name_zh-Hant`, we should fallback to Simplified Chinese if the field has no value.
|
||
if ([localizedKeyPath isEqualToString:@"name_zh-Hant"]) {
|
||
return [NSExpression expressionWithFormat:@"mgl_coalesce({%K, %K, %K, %K, %K})",
|
||
localizedKeyPath, @"name_zh-Hans", @"name_zh-CN", @"name_zh", @"name"];
|
||
}
|
||
|
||
// Other keypath fallback to `name`
|
||
return [NSExpression expressionWithFormat:@"mgl_coalesce({%K, %K})", localizedKeyPath, @"name"];
|
||
}
|
||
return self;
|
||
}
|
||
|
||
case NSFunctionExpressionType: {
|
||
NSExpression *operand = self.operand;
|
||
NSExpression *localizedOperand = [operand mgl_expressionLocalizedIntoLocale:locale];
|
||
|
||
NSArray *arguments = self.arguments;
|
||
NSArray *localizedArguments = MGLLocalizedCollection(arguments, locale);
|
||
if (localizedArguments != arguments) {
|
||
return [NSExpression expressionForFunction:localizedOperand
|
||
selectorName:self.function
|
||
arguments:localizedArguments];
|
||
}
|
||
if (localizedOperand != operand) {
|
||
return [NSExpression expressionForFunction:localizedOperand
|
||
selectorName:self.function
|
||
arguments:self.arguments];
|
||
}
|
||
return self;
|
||
}
|
||
|
||
case NSConditionalExpressionType: {
|
||
NSExpression *trueExpression = self.trueExpression;
|
||
NSExpression *localizedTrueExpression = [trueExpression mgl_expressionLocalizedIntoLocale:locale];
|
||
NSExpression *falseExpression = self.falseExpression;
|
||
NSExpression *localizedFalseExpression = [falseExpression mgl_expressionLocalizedIntoLocale:locale];
|
||
if (localizedTrueExpression != trueExpression || localizedFalseExpression != falseExpression) {
|
||
return [NSExpression expressionForConditional:self.predicate
|
||
trueExpression:localizedTrueExpression
|
||
falseExpression:localizedFalseExpression];
|
||
}
|
||
return self;
|
||
}
|
||
|
||
case NSAggregateExpressionType: {
|
||
NSArray *collection = self.collection;
|
||
if ([collection isKindOfClass:[NSArray class]]) {
|
||
NSArray *localizedCollection = MGLLocalizedCollection(collection, locale);
|
||
if (localizedCollection != collection) {
|
||
return [NSExpression expressionForAggregate:localizedCollection];
|
||
}
|
||
}
|
||
return self;
|
||
}
|
||
|
||
default:
|
||
return self;
|
||
}
|
||
}
|
||
|
||
@end
|