feat: Added isLandscape() (#504)

* Added isLandscape data.

* Updated docs with isLandscape addition.

* Updated docs.

CHANGELOG.md

 ## Release Notes
 
 ### next
+ * Added isLandscape()
 
 ### 0.23.0
  * Add `hasNotch()` (https://github.com/rebeccahughes/react-native-device-info/pull/500)

README.md

@@ -233,7 +233,8 @@ import DeviceInfo from 'react-native-device-info';
 | [isEmulator()](#isemulator)                       | `boolean`           |  ✅  |   ✅    |   ✅    | ?      |
 | [isPinOrFingerprintSet()](#ispinorfingerprintset) | (callback)`boolean` |  ✅  |   ✅    |   ✅    | 0.10.1 |
 | [isTablet()](#istablet)                           | `boolean`           |  ✅  |   ✅    |   ✅    | ?      |
-| [hasNotch()](#hasNotch)                           | `boolean`           |  ✅  |   ✅    |   ✅    | ?      |
+| [hasNotch()](#hasNotch)                           | `boolean`           |  ✅  |   ✅    |   ✅    | 0.23.0 |
+| [isLandscape()](#isLandscape)                     | `boolean`           |  ✅  |   ✅    |   ✅    | 0.24.0 |
 
 ---
 
@@ -836,6 +837,16 @@ const isTablet = DeviceInfo.isTablet(); // true
 
 ---
 
+### isLandscape()
+
+Tells if the device is currently in landscape mode.
+
+**Examples**
+
+```js
+const isLandscape = DeviceInfo.isLandscape(); // true
+```
+
 ### hasNotch()
 
 Tells if the device has a notch.

deviceinfo.d.ts

@@ -39,7 +39,8 @@ declare const _default: {
   getMaxMemory: () => number;
   getTotalDiskCapacity: () => number;
   getFreeDiskStorage: () => number;
-  getBatteryLevel: () => Promise<number>
+  getBatteryLevel: () => Promise<number>;
+  isLandscape: () => boolean;    
 };
 
 export default _default;

deviceinfo.js

 /**
  * @providesModule react-native-device-info
  */
-import { Platform, NativeModules } from 'react-native';
+import { Platform, NativeModules, Dimensions } from 'react-native';
 
 var RNDeviceInfo = NativeModules.RNDeviceInfo;
 
@@ -239,4 +239,8 @@ export default {
   getBatteryLevel: function() {
     return RNDeviceInfo.getBatteryLevel();
   },
+  isLandscape: function() {
+    const { height, width } = Dimensions.get('window');
+    return width >= height;
+  }    
 };

deviceinfo.js.flow

@@ -41,4 +41,5 @@ declare module.exports: {
   getTotalDiskCapacity: () => number,
   getFreeDiskStorage: () => number,
   getBatteryLevel: () => Promise<number>,
+  isLandscape: () => boolean,
 };

web/index.js

@@ -38,5 +38,6 @@ module.exports = {
   maxMemory: 0,
   totalDiskCapacity: 0,
   freeDiskStorage: 0,
-  getBatteryLevel: () => Promise.resolve(0)
+  getBatteryLevel: () => Promise.resolve(0),
+  isLandscape: false
 };