From cbca7df4b53e53371c718afce2863a20802fc801 Mon Sep 17 00:00:00 2001
From: Brent Vatne <brentvatne@gmail.com>
Date: Wed, 20 Feb 2019 12:47:13 -0800
Subject: [PATCH] Merge pull request #87 from substantial/add-back-font-scaling

iOS Accessibility - add headerBackAllowFontScaling option
---
 packages/stack/src/views/Header/Header.js           | 1 +
 packages/stack/src/views/Header/HeaderBackButton.js | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/stack/src/views/Header/Header.js b/packages/stack/src/views/Header/Header.js
index dd086e59..9b1912fc 100644
--- a/packages/stack/src/views/Header/Header.js
+++ b/packages/stack/src/views/Header/Header.js
@@ -214,6 +214,7 @@ class Header extends React.PureComponent {
         title={backButtonTitle}
         truncatedTitle={truncatedBackButtonTitle}
         backTitleVisible={this.props.backTitleVisible}
+        allowFontScaling={options.headerBackAllowFontScaling}
         titleStyle={options.headerBackTitleStyle}
         layoutPreset={this.props.layoutPreset}
         width={width}
diff --git a/packages/stack/src/views/Header/HeaderBackButton.js b/packages/stack/src/views/Header/HeaderBackButton.js
index 1e6ac64a..96d58bb8 100644
--- a/packages/stack/src/views/Header/HeaderBackButton.js
+++ b/packages/stack/src/views/Header/HeaderBackButton.js
@@ -79,7 +79,7 @@ class HeaderBackButton extends React.PureComponent {
   };
 
   _maybeRenderTitle() {
-    const { backTitleVisible, titleStyle, tintColor } = this.props;
+    const { allowFontScaling, backTitleVisible, titleStyle, tintColor } = this.props;
     let backTitleText = this._getTitleText();
 
     if (!backTitleVisible || backTitleText === null) {
@@ -92,6 +92,7 @@ class HeaderBackButton extends React.PureComponent {
         onLayout={this._onTextLayout}
         style={[styles.title, !!tintColor && { color: tintColor }, titleStyle]}
         numberOfLines={1}
+        allowFontScaling={!!allowFontScaling}
       >
         {this._getTitleText()}
       </Text>