Move platform to common and remove dom dependence in common

Because common/ imports 'xterm', it also imported dom accidentally.

Fixes #1990

src/common/EventEmitter.ts

@@ -3,8 +3,7 @@
  * @license MIT
  */
 
-import { XtermListener } from './Types';
-import { IEventEmitter, IDisposable } from 'xterm';
+import { IDisposable, IEventEmitter, XtermListener } from './Types';
 import { Disposable } from './Lifecycle';
 
 export class EventEmitter extends Disposable implements IEventEmitter, IDisposable {

src/common/Lifecycle.ts

@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { IDisposable } from 'xterm';
+import { IDisposable } from './Types';
 
 /**
  * A base class that can be extended to provide convenience methods for managing the lifecycle of an

src/common/Platform.ts

@@ -0,0 +1,37 @@
+/**
+ * Copyright (c) 2016 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+interface INavigator {
+  userAgent: string;
+  language: string;
+  platform: string;
+}
+declare const navigator: INavigator;
+
+const isNode = (typeof navigator === 'undefined') ? true : false;
+const userAgent = (isNode) ? 'node' : navigator.userAgent;
+const platform = (isNode) ? 'node' : navigator.platform;
+
+export const isFirefox = !!~userAgent.indexOf('Firefox');
+export const isSafari = /^((?!chrome|android).)*safari/i.test(userAgent);
+export const isMSIE = !!~userAgent.indexOf('MSIE') || !!~userAgent.indexOf('Trident');
+
+// Find the users platform. We use this to interpret the meta key
+// and ISO third level shifts.
+// http://stackoverflow.com/q/19877924/577598
+export const isMac = contains(['Macintosh', 'MacIntel', 'MacPPC', 'Mac68K'], platform);
+export const isIpad = platform === 'iPad';
+export const isIphone = platform === 'iPhone';
+export const isMSWindows = contains(['Windows', 'Win16', 'Win32', 'WinCE'], platform);
+export const isLinux = platform.indexOf('Linux') >= 0;
+
+/**
+ * Return if the given array contains the given element
+ * @param arr The array to search for the given element.
+ * @param el The element to look for into the array
+ */
+function contains(arr: any[], el: any): boolean {
+  return arr.indexOf(el) >= 0;
+}

src/common/Types.ts

@@ -3,7 +3,16 @@
  * @license MIT
  */
 
-import { IEventEmitter } from 'xterm';
+export interface IDisposable {
+  dispose(): void;
+}
+
+export interface IEventEmitter {
+  on(type: string, listener: (...args: any[]) => void): void;
+  off(type: string, listener: (...args: any[]) => void): void;
+  emit(type: string, data?: any): void;
+  addDisposableListener(type: string, handler: (...args: any[]) => void): IDisposable;
+}
 
 export type XtermListener = (...args: any[]) => void;
 

src/common/tsconfig.json

@@ -1,7 +1,10 @@
 {
   "extends": "../tsconfig-library-base",
   "compilerOptions": {
-    "outDir": "../../lib"
+    "outDir": "../../lib",
+    "types": [
+      "../../node_modules/@types/mocha"
+    ]
   },
   "include": [
     "./**/*"