Migrate DeviceInfoModule from RN Module to Native Function.

Reviewed By: danzimm

Differential Revision: D6750934

fbshipit-source-id: f453801737e41632c6b84ff894e7f0eb66b575dc

Author: Dmitry Zakharov

Libraries/Utilities/Dimensions.js

@@ -11,7 +11,6 @@
  */
 'use strict';
 
-var DeviceInfo = require('DeviceInfo');
 var EventEmitter = require('EventEmitter');
 var Platform = require('Platform');
 var RCTDeviceEventEmitter = require('RCTDeviceEventEmitter');
@@ -21,22 +20,59 @@ var invariant = require('fbjs/lib/invariant');
 var eventEmitter = new EventEmitter();
 var dimensionsInitialized = false;
 var dimensions = {};
+
+var dimensionsProvider: ?(() => {[key:string]: Object});
+
 class Dimensions {
-  /**
-   * This should only be called from native code by sending the
-   * didUpdateDimensions event.
-   *
-   * @param {object} dims Simple string-keyed object of dimensions to set
-   */
-  static set(dims: {[key:string]: any}): void {
+  static setProvider(value: () => {[key:string]: Object}): void {
+    dimensionsProvider = value;
+    dimensionsInitialized = false;
+    dimensions = {};
+  }
+
+  static getDimensions(): {[key:string]: Object} {
+    if (dimensionsInitialized) {
+      return dimensions;
+    }
+
     // We calculate the window dimensions in JS so that we don't encounter loss of
     // precision in transferring the dimensions (which could be non-integers) over
     // the bridge.
+    const dims = (dimensionsProvider || defaultDimProvider)();
+    const result = Dimensions.updateDimensions(dims);
+    RCTDeviceEventEmitter.addListener('didUpdateDimensions', function(update) {
+      Dimensions.updateDimensions(update);
+    });
+    return result;
+  }
+
+  /**
+   * Initial dimensions are set before `runApplication` is called so they should
+   * be available before any other require's are run, but may be updated later.
+   *
+   * Note: Although dimensions are available immediately, they may change (e.g
+   * due to device rotation) so any rendering logic or styles that depend on
+   * these constants should try to call this function on every render, rather
+   * than caching the value (for example, using inline styles rather than
+   * setting a value in a `StyleSheet`).
+   *
+   * Example: `var {height, width} = Dimensions.get('window');`
+   *
+   * @param {string} dim Name of dimension as defined when calling `set`.
+   * @returns {Object?} Value for the dimension.
+   */
+  static get(dim: string): Object {
+    const dims = Dimensions.getDimensions();
+    invariant(dims[dim], 'No dimension set for key ' + dim);
+    return dims[dim];
+  }
+
+  static updateDimensions(dims: ?{[key:string]: Object}): {[key:string]: Object} {
     if (dims && dims.windowPhysicalPixels) {
       // parse/stringify => Clone hack
       dims = JSON.parse(JSON.stringify(dims));
 
-      var windowPhysicalPixels = dims.windowPhysicalPixels;
+      const windowPhysicalPixels = dims.windowPhysicalPixels;
       dims.window = {
         width: windowPhysicalPixels.width / windowPhysicalPixels.scale,
         height: windowPhysicalPixels.height / windowPhysicalPixels.scale,
@@ -45,7 +81,7 @@ class Dimensions {
       };
       if (Platform.OS === 'android') {
         // Screen and window dimensions are different on android
-        var screenPhysicalPixels = dims.screenPhysicalPixels;
+        const screenPhysicalPixels = dims.screenPhysicalPixels;
         dims.screen = {
           width: screenPhysicalPixels.width / screenPhysicalPixels.scale,
           height: screenPhysicalPixels.height / screenPhysicalPixels.scale,
@@ -72,26 +108,7 @@ class Dimensions {
     } else {
       dimensionsInitialized = true;
     }
-  }
-
-  /**
-   * Initial dimensions are set before `runApplication` is called so they should
-   * be available before any other require's are run, but may be updated later.
-   *
-   * Note: Although dimensions are available immediately, they may change (e.g
-   * due to device rotation) so any rendering logic or styles that depend on
-   * these constants should try to call this function on every render, rather
-   * than caching the value (for example, using inline styles rather than
-   * setting a value in a `StyleSheet`).
-   *
-   * Example: `var {height, width} = Dimensions.get('window');`
-   *
-   * @param {string} dim Name of dimension as defined when calling `set`.
-   * @returns {Object?} Value for the dimension.
-   */
-  static get(dim: string): Object {
-    invariant(dimensions[dim], 'No dimension set for key ' + dim);
-    return dimensions[dim];
+    return dimensions;
   }
 
   /**
@@ -128,9 +145,8 @@ class Dimensions {
   }
 }
 
-Dimensions.set(DeviceInfo.Dimensions);
-RCTDeviceEventEmitter.addListener('didUpdateDimensions', function(update) {
-  Dimensions.set(update);
-});
+function defaultDimProvider(): {[key:string]: Object} {
+  return require('DeviceInfo').Dimensions;
+}
 
 module.exports = Dimensions;

React/Modules/RCTDeviceInfo.m

@@ -12,6 +12,7 @@
 #import "RCTAccessibilityManager.h"
 #import "RCTAssert.h"
 #import "RCTEventDispatcher.h"
+#import "RCTUIUtils.h"
 #import "RCTUtils.h"
 
 @implementation RCTDeviceInfo {
@@ -72,18 +73,18 @@ static BOOL RCTIsIPhoneX() {
 {
   RCTAssertMainQueue();
 
-  // Don't use RCTScreenSize since it the interface orientation doesn't apply to it
-  CGRect screenSize = [[UIScreen mainScreen] bounds];
-  NSDictionary *dims = @{
-                         @"width": @(screenSize.size.width),
-                         @"height": @(screenSize.size.height),
-                         @"scale": @(RCTScreenScale()),
-                         @"fontScale": @(bridge.accessibilityManager.multiplier)
-                         };
+  RCTDimensions dimensions = RCTGetDimensions(bridge.accessibilityManager.multiplier);
+  typeof (dimensions.window) window = dimensions.window; // Window and Screen are considered equal for iOS.
+  NSDictionary<NSString *, NSNumber *> *dims = @{
+      @"width": @(window.width),
+      @"height": @(window.height),
+      @"scale": @(window.scale),
+      @"fontScale": @(window.fontScale)
+  };
   return @{
-           @"window": dims,
-           @"screen": dims
-           };
+      @"window": dims,
+      @"screen": dims
+  };
 }
 
 - (void)dealloc

React/React.xcodeproj/project.pbxproj

@@ -1203,6 +1203,7 @@
 		EBF21BFE1FC499840052F4D5 /* InspectorInterfaces.h in Copy Headers */ = {isa = PBXBuildFile; fileRef = EBF21BBA1FC498270052F4D5 /* InspectorInterfaces.h */; };
 		EBF21BFF1FC4998E0052F4D5 /* InspectorInterfaces.cpp in Sources */ = {isa = PBXBuildFile; fileRef = EBF21BBB1FC498270052F4D5 /* InspectorInterfaces.cpp */; };
 		EBF21C001FC499A80052F4D5 /* InspectorInterfaces.cpp in Sources */ = {isa = PBXBuildFile; fileRef = EBF21BBB1FC498270052F4D5 /* InspectorInterfaces.cpp */; };
+		F1EFDA50201F661000EE6E4C /* RCTUIUtils.m in Sources */ = {isa = PBXBuildFile; fileRef = F1EFDA4E201F660F00EE6E4C /* RCTUIUtils.m */; };
 		FEFAAC9E1FDB89B50057BBE0 /* RCTRedBoxExtraDataViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = FEFAAC9C1FDB89B40057BBE0 /* RCTRedBoxExtraDataViewController.m */; };
 		FEFAAC9F1FDB89B50057BBE0 /* RCTRedBoxExtraDataViewController.h in Headers */ = {isa = PBXBuildFile; fileRef = FEFAAC9D1FDB89B40057BBE0 /* RCTRedBoxExtraDataViewController.h */; };
 /* End PBXBuildFile section */
@@ -2279,6 +2280,8 @@
 		EBF21BBB1FC498270052F4D5 /* InspectorInterfaces.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = InspectorInterfaces.cpp; sourceTree = "<group>"; };
 		EBF21BDC1FC498900052F4D5 /* libjsinspector.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libjsinspector.a; sourceTree = BUILT_PRODUCTS_DIR; };
 		EBF21BFA1FC4989A0052F4D5 /* libjsinspector-tvOS.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libjsinspector-tvOS.a"; sourceTree = BUILT_PRODUCTS_DIR; };
+		F1EFDA4E201F660F00EE6E4C /* RCTUIUtils.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTUIUtils.m; sourceTree = "<group>"; };
+		F1EFDA4F201F660F00EE6E4C /* RCTUIUtils.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTUIUtils.h; sourceTree = "<group>"; };
 		FEFAAC9C1FDB89B40057BBE0 /* RCTRedBoxExtraDataViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTRedBoxExtraDataViewController.m; sourceTree = "<group>"; };
 		FEFAAC9D1FDB89B40057BBE0 /* RCTRedBoxExtraDataViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTRedBoxExtraDataViewController.h; sourceTree = "<group>"; };
 /* End PBXFileReference section */
@@ -2888,6 +2891,7 @@
 				657734881EE8352500A0E9EA /* Inspector */,
 				13B07FE01A69315300A75B9A /* Modules */,
 				1450FF7F1BCFF28A00208362 /* Profiler */,
+				F1EFDA4D201F660F00EE6E4C /* UIUtils */,
 				13B07FF31A6947C200A75B9A /* Views */,
 			);
 			name = React;
@@ -3048,6 +3052,15 @@
 			path = jsinspector;
 			sourceTree = "<group>";
 		};
+		F1EFDA4D201F660F00EE6E4C /* UIUtils */ = {
+			isa = PBXGroup;
+			children = (
+				F1EFDA4F201F660F00EE6E4C /* RCTUIUtils.h */,
+				F1EFDA4E201F660F00EE6E4C /* RCTUIUtils.m */,
+			);
+			path = UIUtils;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXHeadersBuildPhase section */
@@ -4508,6 +4521,7 @@
 				13AB90C11B6FA36700713B4F /* RCTComponentData.m in Sources */,
 				13B0801B1A69489C00A75B9A /* RCTNavigatorManager.m in Sources */,
 				916F9C2D1F743F57002E5920 /* RCTModalManager.m in Sources */,
+				F1EFDA50201F661000EE6E4C /* RCTUIUtils.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

React/UIUtils/RCTUIUtils.h

@@ -0,0 +1,37 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import <CoreGraphics/CoreGraphics.h>
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Get window and screen dimensions
+typedef struct {
+  struct {
+    CGFloat width, height, scale, fontScale;
+  } window, screen;
+} RCTDimensions;
+extern __attribute__((visibility("default")))
+RCTDimensions RCTGetDimensions(CGFloat fontScale);
+
+// Get font size multiplier for font base size (Large) by content size category
+extern __attribute__((visibility("default")))
+CGFloat RCTGetMultiplierForContentSizeCategory(UIContentSizeCategory category);
+
+#ifdef __cplusplus
+}
+#endif
+
+NS_ASSUME_NONNULL_END

React/UIUtils/RCTUIUtils.m

@@ -0,0 +1,52 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import "RCTUIUtils.h"
+
+RCTDimensions RCTGetDimensions(CGFloat fontScale)
+{
+  UIScreen *mainScreen = UIScreen.mainScreen;
+  CGSize screenSize = mainScreen.bounds.size;
+  RCTDimensions result;
+  typeof (result.window) dims = {
+    .width = screenSize.width,
+    .height = screenSize.height,
+    .scale = mainScreen.scale,
+    .fontScale = fontScale
+  };
+  result.window = dims;
+  result.screen = dims;
+
+  return result;
+}
+
+CGFloat RCTGetMultiplierForContentSizeCategory(UIContentSizeCategory category)
+{
+  static NSDictionary<NSString *, NSNumber *> *multipliers = nil;
+  static dispatch_once_t token;
+  dispatch_once(&token, ^{
+    multipliers = @{
+        UIContentSizeCategoryExtraSmall: @0.823,
+        UIContentSizeCategorySmall: @0.882,
+        UIContentSizeCategoryMedium: @0.941,
+        UIContentSizeCategoryLarge: @1.0,
+        UIContentSizeCategoryExtraLarge: @1.118,
+        UIContentSizeCategoryExtraExtraLarge: @1.235,
+        UIContentSizeCategoryExtraExtraExtraLarge: @1.353,
+        UIContentSizeCategoryAccessibilityMedium: @1.786,
+        UIContentSizeCategoryAccessibilityLarge: @2.143,
+        UIContentSizeCategoryAccessibilityExtraLarge: @2.643,
+        UIContentSizeCategoryAccessibilityExtraExtraLarge: @3.143,
+        UIContentSizeCategoryAccessibilityExtraExtraExtraLarge: @3.571
+    };
+  });
+
+  double value = multipliers[category].doubleValue;
+  return value > 0.0 ? value : 1.0;
+}