Added support of `<Text>`'s `selectable` attribute on iOS

Reviewed By: mmmulani

Differential Revision: D4187562

fbshipit-source-id: 131ece141fe8b895914043a7a01c6e042e858331

Examples/UIExplorer/js/TextExample.ios.js

@@ -276,6 +276,17 @@ exports.examples = [
       </View>
     );
   },
+}, {
+  title: 'Selectable',
+  render: function() {
+    return (
+      <View>
+        <Text selectable={true}>
+          This text is <Text style={{fontWeight: 'bold'}}>selectable</Text> if you click-and-hold.
+        </Text>
+      </View>
+    );
+  },
 }, {
   title: 'Text Decoration',
   render: function() {

Libraries/Text/RCTShadowText.h

@@ -48,6 +48,7 @@ extern NSString *const RCTReactTagAttributeName;
 @property (nonatomic, strong) UIColor *textShadowColor;
 @property (nonatomic, assign) BOOL adjustsFontSizeToFit;
 @property (nonatomic, assign) CGFloat minimumFontScale;
+@property (nonatomic, assign) BOOL selectable;
 
 - (void)recomputeText;
 

Libraries/Text/RCTShadowText.m

@@ -115,10 +115,12 @@ static CSSSize RCTMeasure(CSSNodeRef node, float width, CSSMeasureMode widthMode
   NSNumber *parentTag = [[self reactSuperview] reactTag];
   NSTextStorage *textStorage = [self buildTextStorageForWidth:width widthMode:CSSMeasureModeExactly];
   CGRect textFrame = [self calculateTextFrame:textStorage];
+  BOOL selectable = _selectable;
   [applierBlocks addObject:^(NSDictionary<NSNumber *, UIView *> *viewRegistry) {
     RCTText *view = (RCTText *)viewRegistry[self.reactTag];
     view.textFrame = textFrame;
     view.textStorage = textStorage;
+    view.selectable = selectable;
 
     /**
      * NOTE: this logic is included to support rich text editing inside multiline

Libraries/Text/RCTText.h

@@ -14,6 +14,6 @@
 @property (nonatomic, assign) UIEdgeInsets contentInset;
 @property (nonatomic, strong) NSTextStorage *textStorage;
 @property (nonatomic, assign) CGRect textFrame;
-
+@property (nonatomic, assign) BOOL selectable;
 
 @end

Libraries/Text/RCTText.m

@@ -9,6 +9,8 @@
 
 #import "RCTText.h"
 
+#import <MobileCoreServices/UTCoreTypes.h>
+
 #import "RCTShadowText.h"
 #import "RCTUtils.h"
 #import "UIView+React.h"
@@ -28,6 +30,7 @@ static void collectNonTextDescendants(RCTText *view, NSMutableArray *nonTextDesc
 {
   NSTextStorage *_textStorage;
   CAShapeLayer *_highlightLayer;
+  UILongPressGestureRecognizer *_longPressGestureRecognizer;
 }
 
 - (instancetype)initWithFrame:(CGRect)frame
@@ -51,6 +54,22 @@ static void collectNonTextDescendants(RCTText *view, NSMutableArray *nonTextDesc
   return [superDescription stringByReplacingCharactersInRange:semicolonRange withString:replacement];
 }
 
+- (void)setSelectable:(BOOL)selectable
+{
+  if (_selectable == selectable) {
+    return;
+  }
+
+  _selectable = selectable;
+
+  if (_selectable) {
+    [self enableContextMenu];
+  }
+  else {
+    [self disableContextMenu];
+  }
+}
+
 - (void)reactSetFrame:(CGRect)frame
 {
   // Text looks super weird if its frame is animated.
@@ -177,4 +196,72 @@ static void collectNonTextDescendants(RCTText *view, NSMutableArray *nonTextDesc
   return _textStorage.string;
 }
 
+#pragma mark - Context Menu
+
+- (void)enableContextMenu
+{
+  _longPressGestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
+  [self addGestureRecognizer:_longPressGestureRecognizer];
+}
+
+- (void)disableContextMenu
+{
+  [self removeGestureRecognizer:_longPressGestureRecognizer];
+  _longPressGestureRecognizer = nil;
+}
+
+- (void)handleLongPress:(UILongPressGestureRecognizer *)gesture
+{
+#if !TARGET_OS_TV
+  UIMenuController *menuController = [UIMenuController sharedMenuController];
+
+  if (menuController.isMenuVisible) {
+    return;
+  }
+
+  if (!self.isFirstResponder) {
+    [self becomeFirstResponder];
+  }
+
+  [menuController setTargetRect:self.bounds inView:self];
+  [menuController setMenuVisible:YES animated:YES];
+#endif
+}
+
+- (BOOL)canBecomeFirstResponder
+{
+  return _selectable;
+}
+
+- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
+{
+  if (action == @selector(copy:)) {
+    return YES;
+  }
+
+  return [super canPerformAction:action withSender:sender];
+}
+
+- (void)copy:(id)sender
+{
+#if !TARGET_OS_TV
+  NSAttributedString *attributedString = _textStorage;
+
+  NSMutableDictionary *item = [NSMutableDictionary new];
+
+  NSData *rtf = [attributedString dataFromRange:NSMakeRange(0, attributedString.length)
+                             documentAttributes:@{NSDocumentTypeDocumentAttribute: NSRTFDTextDocumentType}
+                                          error:nil];
+
+  if (rtf) {
+    [item setObject:rtf forKey:(id)kUTTypeFlatRTFD];
+  }
+
+  [item setObject:attributedString.string forKey:(id)kUTTypeUTF8PlainText];
+
+  UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
+  pasteboard.items = @[item];
+#endif
+}
+
 @end

Libraries/Text/RCTTextManager.m

@@ -84,6 +84,7 @@ RCT_EXPORT_SHADOW_PROPERTY(textShadowRadius, CGFloat)
 RCT_EXPORT_SHADOW_PROPERTY(textShadowColor, UIColor)
 RCT_EXPORT_SHADOW_PROPERTY(adjustsFontSizeToFit, BOOL)
 RCT_EXPORT_SHADOW_PROPERTY(minimumFontScale, CGFloat)
+RCT_EXPORT_SHADOW_PROPERTY(selectable, BOOL)
 
 - (RCTViewManagerUIBlock)uiBlockToAmendWithShadowViewRegistry:(NSDictionary<NSNumber *, RCTShadowView *> *)shadowViewRegistry
 {

Libraries/Text/Text.js

@@ -136,8 +136,6 @@ const Text = React.createClass({
     onLongPress: React.PropTypes.func,
     /**
      * Lets the user select text, to use the native copy and paste functionality.
-     *
-     * @platform android
      */
     selectable: React.PropTypes.bool,
     /**