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Balackburn
393
Tweaks/FLEX/ObjectExplorers/FLEXObjectExplorerViewController.m
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393
Tweaks/FLEX/ObjectExplorers/FLEXObjectExplorerViewController.m
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//
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// FLEXObjectExplorerViewController.m
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// Flipboard
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//
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// Created by Ryan Olson on 2014-05-03.
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// Copyright (c) 2020 FLEX Team. All rights reserved.
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//
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#import "FLEXObjectExplorerViewController.h"
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#import "FLEXUtility.h"
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#import "FLEXRuntimeUtility.h"
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#import "UIBarButtonItem+FLEX.h"
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#import "FLEXMultilineTableViewCell.h"
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#import "FLEXObjectExplorerFactory.h"
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#import "FLEXFieldEditorViewController.h"
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#import "FLEXMethodCallingViewController.h"
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#import "FLEXObjectListViewController.h"
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#import "FLEXTabsViewController.h"
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#import "FLEXBookmarkManager.h"
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#import "FLEXTableView.h"
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#import "FLEXResources.h"
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#import "FLEXTableViewCell.h"
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#import "FLEXScopeCarousel.h"
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#import "FLEXMetadataSection.h"
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#import "FLEXSingleRowSection.h"
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#import "FLEXShortcutsSection.h"
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#import "NSUserDefaults+FLEX.h"
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#import <objc/runtime.h>
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#pragma mark - Private properties
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@interface FLEXObjectExplorerViewController () <UIGestureRecognizerDelegate>
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@property (nonatomic, readonly) FLEXSingleRowSection *descriptionSection;
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@property (nonatomic, readonly) NSArray<FLEXTableViewSection *> *customSections;
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@property (nonatomic) NSIndexSet *customSectionVisibleIndexes;
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@property (nonatomic, readonly) NSArray<NSString *> *observedNotifications;
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@end
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@implementation FLEXObjectExplorerViewController
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#pragma mark - Initialization
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+ (instancetype)exploringObject:(id)target {
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return [self exploringObject:target customSection:[FLEXShortcutsSection forObject:target]];
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}
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+ (instancetype)exploringObject:(id)target customSection:(FLEXTableViewSection *)section {
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return [self exploringObject:target customSections:@[section]];
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}
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+ (instancetype)exploringObject:(id)target customSections:(NSArray *)customSections {
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return [[self alloc]
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initWithObject:target
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explorer:[FLEXObjectExplorer forObject:target]
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customSections:customSections
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];
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}
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- (id)initWithObject:(id)target
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explorer:(__kindof FLEXObjectExplorer *)explorer
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customSections:(NSArray<FLEXTableViewSection *> *)customSections {
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NSParameterAssert(target);
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self = [super initWithStyle:UITableViewStyleGrouped];
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if (self) {
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_object = target;
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_explorer = explorer;
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_customSections = customSections;
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}
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return self;
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}
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- (NSArray<NSString *> *)observedNotifications {
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return @[
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kFLEXDefaultsHidePropertyIvarsKey,
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kFLEXDefaultsHidePropertyMethodsKey,
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kFLEXDefaultsHidePrivateMethodsKey,
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kFLEXDefaultsShowMethodOverridesKey,
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kFLEXDefaultsHideVariablePreviewsKey,
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];
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}
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#pragma mark - View controller lifecycle
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- (void)viewDidLoad {
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[super viewDidLoad];
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self.showsShareToolbarItem = YES;
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self.wantsSectionIndexTitles = YES;
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// Use [object class] here rather than object_getClass
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// to avoid the KVO prefix for observed objects
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self.title = [FLEXRuntimeUtility safeClassNameForObject:self.object];
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// Search
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self.showsSearchBar = YES;
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self.searchBarDebounceInterval = kFLEXDebounceInstant;
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self.showsCarousel = YES;
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// Carousel scope bar
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[self.explorer reloadClassHierarchy];
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self.carousel.items = [self.explorer.classHierarchyClasses flex_mapped:^id(Class cls, NSUInteger idx) {
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return NSStringFromClass(cls);
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}];
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// ... button for extra options
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[self addToolbarItems:@[[UIBarButtonItem
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flex_itemWithImage:FLEXResources.moreIcon target:self action:@selector(moreButtonPressed:)
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]]];
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// Swipe gestures to swipe between classes in the hierarchy
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UISwipeGestureRecognizer *leftSwipe = [[UISwipeGestureRecognizer alloc]
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initWithTarget:self action:@selector(handleSwipeGesture:)
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];
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UISwipeGestureRecognizer *rightSwipe = [[UISwipeGestureRecognizer alloc]
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initWithTarget:self action:@selector(handleSwipeGesture:)
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];
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leftSwipe.direction = UISwipeGestureRecognizerDirectionLeft;
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rightSwipe.direction = UISwipeGestureRecognizerDirectionRight;
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leftSwipe.delegate = self;
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rightSwipe.delegate = self;
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[self.tableView addGestureRecognizer:leftSwipe];
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[self.tableView addGestureRecognizer:rightSwipe];
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// Observe preferences which may change on other screens
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//
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// "If your app targets iOS 9.0 and later or macOS 10.11 and later,
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// you don't need to unregister an observer in its dealloc method."
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for (NSString *pref in self.observedNotifications) {
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[NSNotificationCenter.defaultCenter
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addObserver:self
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selector:@selector(fullyReloadData)
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name:pref
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object:nil
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];
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}
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}
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- (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView {
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[self.navigationController setToolbarHidden:NO animated:YES];
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return YES;
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}
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#pragma mark - Overrides
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/// Override to hide the description section when searching
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- (NSArray<FLEXTableViewSection *> *)nonemptySections {
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if (self.shouldShowDescription) {
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return super.nonemptySections;
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}
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return [super.nonemptySections flex_filtered:^BOOL(FLEXTableViewSection *section, NSUInteger idx) {
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return section != self.descriptionSection;
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}];
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}
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- (NSArray<FLEXTableViewSection *> *)makeSections {
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FLEXObjectExplorer *explorer = self.explorer;
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// Description section is only for instances
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if (self.explorer.objectIsInstance) {
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_descriptionSection = [FLEXSingleRowSection
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title:@"Description" reuse:kFLEXMultilineCell cell:^(FLEXTableViewCell *cell) {
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cell.titleLabel.font = UIFont.flex_defaultTableCellFont;
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cell.titleLabel.text = explorer.objectDescription;
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}
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];
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self.descriptionSection.filterMatcher = ^BOOL(NSString *filterText) {
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return [explorer.objectDescription localizedCaseInsensitiveContainsString:filterText];
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};
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}
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// Object graph section
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FLEXSingleRowSection *referencesSection = [FLEXSingleRowSection
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title:@"Object Graph" reuse:kFLEXDefaultCell cell:^(FLEXTableViewCell *cell) {
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cell.titleLabel.text = @"See Objects with References to This Object";
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cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
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}
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];
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referencesSection.selectionAction = ^(UIViewController *host) {
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UIViewController *references = [FLEXObjectListViewController
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objectsWithReferencesToObject:explorer.object
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retained:NO
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];
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[host.navigationController pushViewController:references animated:YES];
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};
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NSMutableArray *sections = [NSMutableArray arrayWithArray:@[
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[FLEXMetadataSection explorer:self.explorer kind:FLEXMetadataKindProperties],
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[FLEXMetadataSection explorer:self.explorer kind:FLEXMetadataKindClassProperties],
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[FLEXMetadataSection explorer:self.explorer kind:FLEXMetadataKindIvars],
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[FLEXMetadataSection explorer:self.explorer kind:FLEXMetadataKindMethods],
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[FLEXMetadataSection explorer:self.explorer kind:FLEXMetadataKindClassMethods],
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[FLEXMetadataSection explorer:self.explorer kind:FLEXMetadataKindClassHierarchy],
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[FLEXMetadataSection explorer:self.explorer kind:FLEXMetadataKindProtocols],
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[FLEXMetadataSection explorer:self.explorer kind:FLEXMetadataKindOther],
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referencesSection
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]];
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if (self.customSections) {
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[sections insertObjects:self.customSections atIndexes:[NSIndexSet
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indexSetWithIndexesInRange:NSMakeRange(0, self.customSections.count)
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]];
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}
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if (self.descriptionSection) {
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[sections insertObject:self.descriptionSection atIndex:0];
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}
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return sections.copy;
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}
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/// In our case, all this does is reload the table view,
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/// or reload the sections' data if we changed places
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/// in the class hierarchy. Doesn't refresh \c self.explorer
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- (void)reloadData {
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// Check to see if class scope changed, update accordingly
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if (self.explorer.classScope != self.selectedScope) {
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self.explorer.classScope = self.selectedScope;
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[self reloadSections];
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}
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[super reloadData];
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}
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- (void)shareButtonPressed:(UIBarButtonItem *)sender {
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[FLEXAlert makeSheet:^(FLEXAlert *make) {
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make.button(@"Add to Bookmarks").handler(^(NSArray<NSString *> *strings) {
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[FLEXBookmarkManager.bookmarks addObject:self.object];
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});
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make.button(@"Copy Description").handler(^(NSArray<NSString *> *strings) {
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UIPasteboard.generalPasteboard.string = self.explorer.objectDescription;
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});
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make.button(@"Copy Address").handler(^(NSArray<NSString *> *strings) {
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UIPasteboard.generalPasteboard.string = [FLEXUtility addressOfObject:self.object];
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});
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make.button(@"Cancel").cancelStyle();
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} showFrom:self source:sender];
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}
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#pragma mark - Private
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/// Unlike \c -reloadData, this refreshes everything, including the explorer.
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- (void)fullyReloadData {
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[self.explorer reloadMetadata];
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[self reloadSections];
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[self reloadData];
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}
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- (void)handleSwipeGesture:(UISwipeGestureRecognizer *)gesture {
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if (gesture.state == UIGestureRecognizerStateEnded) {
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switch (gesture.direction) {
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case UISwipeGestureRecognizerDirectionRight:
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if (self.selectedScope > 0) {
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self.selectedScope -= 1;
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}
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break;
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case UISwipeGestureRecognizerDirectionLeft:
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if (self.selectedScope != self.explorer.classHierarchy.count - 1) {
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self.selectedScope += 1;
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}
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break;
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default:
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break;
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}
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}
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}
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- (BOOL)gestureRecognizer:(UIGestureRecognizer *)g1 shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer *)g2 {
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// Prioritize important pan gestures over our swipe gesture
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if ([g2 isKindOfClass:[UIPanGestureRecognizer class]]) {
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if (g2 == self.navigationController.interactivePopGestureRecognizer) {
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return NO;
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}
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if (g2 == self.tableView.panGestureRecognizer) {
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return NO;
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}
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}
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return YES;
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}
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- (BOOL)gestureRecognizerShouldBegin:(UISwipeGestureRecognizer *)gesture {
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// Don't allow swiping from the carousel
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CGPoint location = [gesture locationInView:self.tableView];
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if ([self.carousel hitTest:location withEvent:nil]) {
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return NO;
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}
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return YES;
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}
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- (void)moreButtonPressed:(UIBarButtonItem *)sender {
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NSUserDefaults *defaults = NSUserDefaults.standardUserDefaults;
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// Maps preference keys to a description of what they affect
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NSDictionary<NSString *, NSString *> *explorerToggles = @{
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kFLEXDefaultsHidePropertyIvarsKey: @"Property-Backing Ivars",
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kFLEXDefaultsHidePropertyMethodsKey: @"Property-Backing Methods",
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kFLEXDefaultsHidePrivateMethodsKey: @"Likely Private Methods",
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kFLEXDefaultsShowMethodOverridesKey: @"Method Overrides",
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kFLEXDefaultsHideVariablePreviewsKey: @"Variable Previews"
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};
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// Maps the key of the action itself to a map of a description
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// of the action ("hide X") mapped to the current state.
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//
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// So keys that are hidden by default have NO mapped to "Show"
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NSDictionary<NSString *, NSDictionary *> *nextStateDescriptions = @{
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kFLEXDefaultsHidePropertyIvarsKey: @{ @NO: @"Hide ", @YES: @"Show " },
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kFLEXDefaultsHidePropertyMethodsKey: @{ @NO: @"Hide ", @YES: @"Show " },
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kFLEXDefaultsHidePrivateMethodsKey: @{ @NO: @"Hide ", @YES: @"Show " },
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kFLEXDefaultsShowMethodOverridesKey: @{ @NO: @"Show ", @YES: @"Hide " },
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kFLEXDefaultsHideVariablePreviewsKey: @{ @NO: @"Hide ", @YES: @"Show " },
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};
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[FLEXAlert makeSheet:^(FLEXAlert *make) {
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make.title(@"Options");
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for (NSString *option in explorerToggles.allKeys) {
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BOOL current = [defaults boolForKey:option];
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NSString *title = [nextStateDescriptions[option][@(current)]
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stringByAppendingString:explorerToggles[option]
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];
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make.button(title).handler(^(NSArray<NSString *> *strings) {
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[NSUserDefaults.standardUserDefaults flex_toggleBoolForKey:option];
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[self fullyReloadData];
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});
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}
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make.button(@"Cancel").cancelStyle();
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} showFrom:self source:sender];
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}
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#pragma mark - Description
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- (BOOL)shouldShowDescription {
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// Hide if we have filter text; it is rarely
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// useful to see the description when searching
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// since it's already at the top of the screen
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if (self.filterText.length) {
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return NO;
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}
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return YES;
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}
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- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
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// For the description section, we want that nice slim/snug looking row.
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// Other rows use the automatic size.
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FLEXTableViewSection *section = self.filterDelegate.sections[indexPath.section];
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if (section == self.descriptionSection) {
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NSAttributedString *attributedText = [[NSAttributedString alloc]
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initWithString:self.explorer.objectDescription
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attributes:@{ NSFontAttributeName : UIFont.flex_defaultTableCellFont }
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];
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return [FLEXMultilineTableViewCell
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preferredHeightWithAttributedText:attributedText
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maxWidth:tableView.frame.size.width - tableView.separatorInset.right
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style:tableView.style
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showsAccessory:NO
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];
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}
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return UITableViewAutomaticDimension;
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}
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- (BOOL)tableView:(UITableView *)tableView shouldShowMenuForRowAtIndexPath:(NSIndexPath *)indexPath {
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return self.filterDelegate.sections[indexPath.section] == self.descriptionSection;
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}
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- (BOOL)tableView:(UITableView *)tableView canPerformAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender {
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// Only the description section has "actions"
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if (self.filterDelegate.sections[indexPath.section] == self.descriptionSection) {
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return action == @selector(copy:);
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}
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return NO;
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}
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- (void)tableView:(UITableView *)tableView performAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender {
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if (action == @selector(copy:)) {
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UIPasteboard.generalPasteboard.string = self.explorer.objectDescription;
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}
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}
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@end
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Reference in New Issue
Block a user