added files via upload

Tweaks/FLEX/Editing/FLEXMethodCallingViewController.m

@@ -0,0 +1,110 @@
+//
+//  FLEXMethodCallingViewController.m
+//  Flipboard
+//
+//  Created by Ryan Olson on 5/23/14.
+//  Copyright (c) 2020 FLEX Team. All rights reserved.
+//
+
+#import "FLEXMethodCallingViewController.h"
+#import "FLEXRuntimeUtility.h"
+#import "FLEXFieldEditorView.h"
+#import "FLEXObjectExplorerFactory.h"
+#import "FLEXObjectExplorerViewController.h"
+#import "FLEXArgumentInputView.h"
+#import "FLEXArgumentInputViewFactory.h"
+#import "FLEXUtility.h"
+
+@interface FLEXMethodCallingViewController ()
+@property (nonatomic, readonly) FLEXMethod *method;
+@end
+
+@implementation FLEXMethodCallingViewController
+
++ (instancetype)target:(id)target method:(FLEXMethod *)method {
+    return [[self alloc] initWithTarget:target method:method];
+}
+
+- (id)initWithTarget:(id)target method:(FLEXMethod *)method {
+    NSParameterAssert(method.isInstanceMethod == !object_isClass(target));
+
+    self = [super initWithTarget:target data:method commitHandler:nil];
+    if (self) {
+        self.title = method.isInstanceMethod ? @"Method: " : @"Class Method: ";
+        self.title = [self.title stringByAppendingString:method.selectorString];
+    }
+
+    return self;
+}
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+
+    self.actionButton.title = @"Call";
+
+    // Configure field editor view
+    self.fieldEditorView.argumentInputViews = [self argumentInputViews];
+    self.fieldEditorView.fieldDescription = [NSString stringWithFormat:
+        @"Signature:\n%@\n\nReturn Type:\n%s",
+        self.method.description, (char *)self.method.returnType
+    ];
+}
+
+- (NSArray<FLEXArgumentInputView *> *)argumentInputViews {
+    Method method = self.method.objc_method;
+    NSArray *methodComponents = [FLEXRuntimeUtility prettyArgumentComponentsForMethod:method];
+    NSMutableArray<FLEXArgumentInputView *> *argumentInputViews = [NSMutableArray new];
+    unsigned int argumentIndex = kFLEXNumberOfImplicitArgs;
+
+    for (NSString *methodComponent in methodComponents) {
+        char *argumentTypeEncoding = method_copyArgumentType(method, argumentIndex);
+        FLEXArgumentInputView *inputView = [FLEXArgumentInputViewFactory argumentInputViewForTypeEncoding:argumentTypeEncoding];
+        free(argumentTypeEncoding);
+
+        inputView.backgroundColor = self.view.backgroundColor;
+        inputView.title = methodComponent;
+        [argumentInputViews addObject:inputView];
+        argumentIndex++;
+    }
+
+    return argumentInputViews;
+}
+
+- (void)actionButtonPressed:(id)sender {
+    // Gather arguments
+    NSMutableArray *arguments = [NSMutableArray new];
+    for (FLEXArgumentInputView *inputView in self.fieldEditorView.argumentInputViews) {
+        // Use NSNull as a nil placeholder; it will be interpreted as nil
+        [arguments addObject:inputView.inputValue ?: NSNull.null];
+    }
+
+    // Call method
+    NSError *error = nil;
+    id returnValue = [FLEXRuntimeUtility
+        performSelector:self.method.selector
+        onObject:self.target
+        withArguments:arguments
+        error:&error
+    ];
+    
+    // Dismiss keyboard and handle committed changes
+    [super actionButtonPressed:sender];
+
+    // Display return value or error
+    if (error) {
+        [FLEXAlert showAlert:@"Method Call Failed" message:error.localizedDescription from:self];
+    } else if (returnValue) {
+        // For non-nil (or void) return types, push an explorer view controller to display the returned object
+        returnValue = [FLEXRuntimeUtility potentiallyUnwrapBoxedPointer:returnValue type:self.method.returnType];
+        FLEXObjectExplorerViewController *explorer = [FLEXObjectExplorerFactory explorerViewControllerForObject:returnValue];
+        [self.navigationController pushViewController:explorer animated:YES];
+    } else {
+        [self exploreObjectOrPopViewController:returnValue];
+    }
+}
+
+- (FLEXMethod *)method {
+    return _data;
+}
+
+@end