Use dynamic type everywhere in conversation view.

Signal/src/ViewControllers/ConversationView/Cells/OWSMessageBubbleView.m

@@ -91,7 +91,7 @@ NS_ASSUME_NONNULL_BEGIN
 {
     OWSAssert(DisplayableText.kMaxJumbomojiCount == 5);
 
-    CGFloat basePointSize = [UIFont ows_dynamicTypeBodyFont].pointSize;
+    CGFloat basePointSize = UIFont.ows_dynamicTypeBodyFont.pointSize;
     switch (self.displayableBodyText.jumbomojiCount) {
         case 0:
             break;
@@ -108,7 +108,7 @@ NS_ASSUME_NONNULL_BEGIN
             break;
     }
 
-    return [UIFont ows_dynamicTypeBodyFont];
+    return UIFont.ows_dynamicTypeBodyFont;
 }
 
 #pragma mark - Convenience Accessors
@@ -946,7 +946,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (UIFont *)tapForMoreFont
 {
-    return [UIFont ows_regularFontWithSize:12.f];
+    return UIFont.ows_dynamicTypeCaption1Font;
 }
 
 - (CGFloat)tapForMoreHeight

Signal/src/ViewControllers/ConversationView/Cells/OWSMessageCell.m

@@ -62,13 +62,13 @@ NS_ASSUME_NONNULL_BEGIN
     [self.contentView addSubview:self.footerView];
 
     self.dateHeaderLabel = [UILabel new];
-    self.dateHeaderLabel.font = [UIFont ows_regularFontWithSize:12.f];
+    self.dateHeaderLabel.font = self.dateHeaderDateFont;
     self.dateHeaderLabel.textAlignment = NSTextAlignmentCenter;
     self.dateHeaderLabel.textColor = [UIColor lightGrayColor];
     [self.contentView addSubview:self.dateHeaderLabel];
 
     self.footerLabel = [UILabel new];
-    self.footerLabel.font = [UIFont ows_regularFontWithSize:12.f];
+    self.footerLabel.font = UIFont.ows_dynamicTypeCaption1Font;
     self.footerLabel.textColor = [UIColor lightGrayColor];
     [self.footerView addSubview:self.footerLabel];
 
@@ -362,12 +362,12 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (UIFont *)dateHeaderDateFont
 {
-    return [UIFont boldSystemFontOfSize:12.0f];
+    return UIFont.ows_dynamicTypeCaption1Font.ows_medium;
 }
 
 - (UIFont *)dateHeaderTimeFont
 {
-    return [UIFont systemFontOfSize:12.0f];
+    return UIFont.ows_dynamicTypeCaption1Font;
 }
 
 #pragma mark - Measurement

Signal/src/ViewControllers/ConversationView/Cells/OWSQuotedMessageView.m

@@ -368,7 +368,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (UIFont *)quotedAuthorFont
 {
-    return [UIFont ows_mediumFontWithSize:11.f];
+    return UIFont.ows_dynamicTypeCaption1Font.ows_medium;
 }
 
 - (UIColor *)quotedAuthorColor
@@ -383,8 +383,6 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (UIFont *)quotedTextFont
 {
-    // Honor dynamic type in the text.
-    // TODO: ?
     return [UIFont ows_dynamicTypeBodyFont];
 }
 
@@ -395,11 +393,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (UIFont *)fileTypeFont
 {
-    UIFontDescriptor *fontD =
-        [self.quotedTextFont.fontDescriptor fontDescriptorWithSymbolicTraits:UIFontDescriptorTraitItalic];
-    UIFont *font = [UIFont fontWithDescriptor:fontD size:0];
-    OWSAssert(font);
-    return font ?: self.quotedTextFont;
+    return self.quotedTextFont.ows_italic;
 }
 
 - (UIColor *)filenameTextColor

Signal/src/ViewControllers/ConversationView/ConversationViewController.m

@@ -1101,7 +1101,7 @@ typedef enum : NSUInteger {
         name = [self.contactsManager
             attributedStringForConversationTitleWithPhoneIdentifier:self.thread.contactIdentifier
                                                         primaryFont:[self navigationBarTitleLabelFont]
-                                                      secondaryFont:[UIFont ows_footnoteFont]];
+                                                      secondaryFont:[UIFont ows_dynamicTypeFootnoteFont]];
     }
     self.title = nil;
 

Signal/src/ViewControllers/InboxTableViewCell.m

@@ -341,9 +341,10 @@ const NSUInteger kAvatarViewDiameter = 52;
             name = [[NSAttributedString alloc] initWithString:thread.name];
         }
     } else {
-        name = [contactsManager attributedStringForConversationTitleWithPhoneIdentifier:thread.contactIdentifier
-                                                                            primaryFont:self.nameLabel.font
-                                                                          secondaryFont:[UIFont ows_footnoteFont]];
+        name = [contactsManager
+            attributedStringForConversationTitleWithPhoneIdentifier:thread.contactIdentifier
+                                                        primaryFont:self.nameLabel.font
+                                                      secondaryFont:[UIFont ows_dynamicTypeFootnoteFont]];
     }
     
     self.nameLabel.attributedText = name;

Signal/src/ViewControllers/MessageDetailViewController.swift

@@ -232,7 +232,7 @@ class MessageDetailViewController: OWSViewController, MediaDetailPresenter, Medi
                     // We use the "short" status message to avoid being redundant with the section title.
                     statusLabel.text = shortStatusMessage
                     statusLabel.textColor = UIColor.ows_darkGray
-                    statusLabel.font = UIFont.ows_footnote
+                    statusLabel.font = .ows_dynamicTypeFootnote
                     statusLabel.adjustsFontSizeToFitWidth = true
                     statusLabel.sizeToFit()
                     cell.accessoryView = statusLabel

Signal/src/ViewControllers/ProfileViewController.m

@@ -179,7 +179,7 @@ NSString *const kProfileView_LastPresentedDate = @"kProfileView_LastPresentedDat
 
     UILabel *infoLabel = [UILabel new];
     infoLabel.textColor = [UIColor ows_darkGrayColor];
-    infoLabel.font = [UIFont ows_footnoteFont];
+    infoLabel.font = [UIFont ows_dynamicTypeFootnoteFont];
     infoLabel.textAlignment = NSTextAlignmentCenter;
     NSMutableAttributedString *text = [NSMutableAttributedString new];
     [text appendAttributedString:[[NSAttributedString alloc]

Signal/src/ViewControllers/ThreadSettings/OWSConversationSettingsViewController.m

@@ -382,7 +382,7 @@ NS_ASSUME_NONNULL_BEGIN
             subtitleLabel.text
                 = NSLocalizedString(@"DISAPPEARING_MESSAGES_DESCRIPTION", @"subheading in conversation settings");
             subtitleLabel.textColor = [UIColor blackColor];
-            subtitleLabel.font = [UIFont ows_footnoteFont];
+            subtitleLabel.font = [UIFont ows_dynamicTypeFootnoteFont];
             subtitleLabel.numberOfLines = 0;
             subtitleLabel.lineBreakMode = NSLineBreakByWordWrapping;
             [cell.contentView addSubview:subtitleLabel];
@@ -421,7 +421,7 @@ NS_ASSUME_NONNULL_BEGIN
                             UILabel *rowLabel = strongSelf.disappearingMessagesDurationLabel;
                             [strongSelf updateDisappearingMessagesDurationLabel];
                             rowLabel.textColor = [UIColor blackColor];
-                            rowLabel.font = [UIFont ows_footnoteFont];
+                            rowLabel.font = [UIFont ows_dynamicTypeFootnoteFont];
                             rowLabel.lineBreakMode = NSLineBreakByTruncatingTail;
                             [topView addSubview:rowLabel];
                             [rowLabel autoVCenterInSuperview];

Signal/src/views/AttachmentPointerView.swift

@@ -118,7 +118,7 @@ class AttachmentPointerView: UIView {
         statusLabel.numberOfLines = 2
 
         statusLabel.textColor = self.textColor
-        statusLabel.font = UIFont.ows_footnote
+        statusLabel.font = .ows_dynamicTypeFootnote
 
         statusLabel.autoPinWidthToSuperview()
         statusLabel.autoPinEdge(.top, to: .bottom, of: progressView, withOffset: 4)

Signal/src/views/GroupTableViewCell.swift

@@ -24,8 +24,8 @@ import SignalServiceKit
         self.contentView.addSubview(textContainer)
 
         // Font config
-        nameLabel.font = UIFont.ows_dynamicTypeBody
-        subtitleLabel.font = UIFont.ows_footnote
+        nameLabel.font = .ows_dynamicTypeBody
+        subtitleLabel.font = .ows_dynamicTypeFootnote
         subtitleLabel.textColor = UIColor.ows_darkGray
 
         // Listen to notifications...

Signal/src/views/QuotedReplyPreview.swift

@@ -40,7 +40,7 @@ class QuotedReplyPreview: UIView {
 
         let bodyLabel: UILabel = UILabel()
         bodyLabel.textColor = foregroundColor
-        bodyLabel.font = .ows_footnote
+        bodyLabel.font = .ows_dynamicTypeFootnote
 
         bodyLabel.text = {
             if let contentType = quotedReply.contentType {

SignalMessaging/Views/ContactTableViewCell.m

@@ -83,12 +83,12 @@ const CGFloat kContactTableViewCellAvatarTextMargin = 12;
 
     _profileNameLabel = [UILabel new];
     _profileNameLabel.lineBreakMode = NSLineBreakByTruncatingTail;
-    _profileNameLabel.font = [UIFont ows_footnoteFont];
+    _profileNameLabel.font = [UIFont ows_dynamicTypeFootnoteFont];
     _profileNameLabel.textColor = [UIColor grayColor];
     [_nameContainerView addSubview:_profileNameLabel];
 
     _subtitle = [UILabel new];
-    _subtitle.font = [UIFont ows_footnoteFont];
+    _subtitle.font = [UIFont ows_dynamicTypeFootnoteFont];
     _subtitle.textColor = [UIColor ows_darkGrayColor];
     [_nameContainerView addSubview:self.subtitle];
 

SignalMessaging/categories/UIFont+OWS.h

@@ -18,8 +18,6 @@ NS_ASSUME_NONNULL_BEGIN
 
 + (UIFont *)ows_boldFontWithSize:(CGFloat)size;
 
-+ (UIFont *)ows_dynamicTypeBodyFont:(CGFloat)size;
-
 #pragma mark - Icon Fonts
 
 + (UIFont *)ows_fontAwesomeFont:(CGFloat)size;
@@ -28,11 +26,20 @@ NS_ASSUME_NONNULL_BEGIN
 
 #pragma mark - Dynamic Type
 
-@property (class, readonly, nonatomic) UIFont *ows_dynamicTypeBodyFont;
+@property (class, readonly, nonatomic) UIFont *ows_dynamicTypeTitle1Font;
 @property (class, readonly, nonatomic) UIFont *ows_dynamicTypeTitle2Font;
+@property (class, readonly, nonatomic) UIFont *ows_dynamicTypeTitle3Font;
 @property (class, readonly, nonatomic) UIFont *ows_dynamicTypeHeadlineFont;
-@property (class, readonly, nonatomic) UIFont *ows_infoMessageFont;
-@property (class, readonly, nonatomic) UIFont *ows_footnoteFont;
+@property (class, readonly, nonatomic) UIFont *ows_dynamicTypeSubheadlineFont;
+@property (class, readonly, nonatomic) UIFont *ows_dynamicTypeBodyFont;
+@property (class, readonly, nonatomic) UIFont *ows_dynamicTypeFootnoteFont;
+@property (class, readonly, nonatomic) UIFont *ows_dynamicTypeCaption1Font;
+@property (class, readonly, nonatomic) UIFont *ows_dynamicTypeCaption2Font;
+
+#pragma mark - Styles
+
+- (UIFont *)ows_italic;
+- (UIFont *)ows_medium;
 
 @end
 

SignalMessaging/categories/UIFont+OWS.m

@@ -33,11 +33,6 @@ NS_ASSUME_NONNULL_BEGIN
     return [UIFont boldSystemFontOfSize:size];
 }
 
-+ (UIFont *)ows_dynamicTypeBodyFont:(CGFloat)size
-{
-    return [UIFont ows_dynamicTypeBodyFont];
-}
-
 #pragma mark - Icon Fonts
 
 + (UIFont *)ows_fontAwesomeFont:(CGFloat)size
@@ -57,29 +52,85 @@ NS_ASSUME_NONNULL_BEGIN
 
 #pragma mark - Dynamic Type
 
-+ (UIFont *)ows_dynamicTypeBodyFont
++ (UIFont *)ows_dynamicTypeTitle1Font
 {
-    return [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
+    return [UIFont preferredFontForTextStyle:UIFontTextStyleTitle1];
+}
+
++ (UIFont *)ows_dynamicTypeTitle2Font
+{
+    return [UIFont preferredFontForTextStyle:UIFontTextStyleTitle2];
 }
 
-+ (UIFont *)ows_infoMessageFont
++ (UIFont *)ows_dynamicTypeTitle3Font
+{
+    return [UIFont preferredFontForTextStyle:UIFontTextStyleTitle3];
+}
+
++ (UIFont *)ows_dynamicTypeHeadlineFont
+{
+    return [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];
+}
+
++ (UIFont *)ows_dynamicTypeSubheadlineFont
 {
     return [UIFont preferredFontForTextStyle:UIFontTextStyleSubheadline];
 }
 
-+ (UIFont *)ows_footnoteFont
++ (UIFont *)ows_dynamicTypeBodyFont
+{
+    return [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
+}
+
++ (UIFont *)ows_dynamicTypeFootnoteFont
 {
     return [UIFont preferredFontForTextStyle:UIFontTextStyleFootnote];
 }
 
-+ (UIFont *)ows_dynamicTypeTitle2Font
++ (UIFont *)ows_dynamicTypeCaption1Font
 {
-    return [UIFont preferredFontForTextStyle:UIFontTextStyleTitle2];
+    return [UIFont preferredFontForTextStyle:UIFontTextStyleCaption1];
 }
 
-+ (UIFont *)ows_dynamicTypeHeadlineFont
++ (UIFont *)ows_dynamicTypeCaption2Font
 {
-    return [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];
+    return [UIFont preferredFontForTextStyle:UIFontTextStyleCaption2];
+}
+
+#pragma mark - Styles
+
+- (UIFont *)ows_italic
+{
+    return [self styleWithSymbolicTraits:UIFontDescriptorTraitItalic];
+}
+
+- (UIFont *)styleWithSymbolicTraits:(UIFontDescriptorSymbolicTraits)symbolicTraits
+{
+    UIFontDescriptor *fontDescriptor = [self.fontDescriptor fontDescriptorWithSymbolicTraits:symbolicTraits];
+    UIFont *font = [UIFont fontWithDescriptor:fontDescriptor size:0];
+    OWSAssert(font);
+    return font ?: self;
+}
+
+- (UIFont *)ows_medium
+{
+    // The recommended approach of deriving "medium" weight fonts for dynamic
+    // type fonts is:
+    //
+    // [UIFontDescriptor fontDescriptorByAddingAttributes:...]
+    //
+    // But this doesn't seem to work in practice on iOS 11 using UIFontWeightMedium.
+
+    UIFont *derivedFont = [UIFont systemFontOfSize:self.pointSize weight:UIFontWeightMedium];
+
+    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(11, 0)) {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpartial-availability"
+        return [[UIFontMetrics defaultMetrics] scaledFontForFont:derivedFont];
+#pragma clang diagnostic pop
+    } else {
+        return derivedFont;
+    }
 }
 
 @end