Merge remote-tracking branch 'upstream/master' into 449_keep_span_pool

src/utils/Browser.js

@@ -1,22 +0,0 @@
-/**
- * Attributes and methods to help with identifying the current browser and platform.
- * @module xterm/utils/Browser
- * @license MIT
- */
-
-import { contains } from './Generic.js';
-
-let isNode = (typeof navigator == 'undefined') ? true : false;
-let userAgent = (isNode) ? 'node' : navigator.userAgent;
-let platform = (isNode) ? 'node' : navigator.platform;
-
-export let isFirefox = !!~userAgent.indexOf('Firefox');
-export let 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 let isMac = contains(['Macintosh', 'MacIntel', 'MacPPC', 'Mac68K'], platform);
-export let isIpad = platform === 'iPad';
-export let isIphone = platform === 'iPhone';
-export let isMSWindows = contains(['Windows', 'Win16', 'Win32', 'WinCE'], platform);

src/utils/Browser.ts

@@ -0,0 +1,22 @@
+/**
+ * Attributes and methods to help with identifying the current browser and platform.
+ * @module xterm/utils/Browser
+ * @license MIT
+ */
+
+import { contains } from './Generic';
+
+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 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);

src/utils/CharMeasure.ts

@@ -0,0 +1,52 @@
+/**
+ * @module xterm/utils/CharMeasure
+ * @license MIT
+ */
+
+import { EventEmitter } from '../EventEmitter.js';
+
+/**
+ * Utility class that measures the size of a character.
+ */
+export class CharMeasure extends EventEmitter {
+  private _parentElement: HTMLElement;
+  private _measureElement: HTMLElement;
+  private _width: number;
+  private _height: number;
+
+  constructor(parentElement: HTMLElement) {
+    super();
+    this._parentElement = parentElement;
+  }
+
+  public get width(): number {
+    return this._width;
+  }
+
+  public get height(): number {
+    return this._height;
+  }
+
+  public measure(): void {
+    const oldWidth = this._width;
+    const oldHeight = this._height;
+
+    if (!this._measureElement) {
+      this._measureElement = document.createElement('span');
+      this._measureElement.style.position = 'absolute';
+      this._measureElement.style.top = '0';
+      this._measureElement.style.left = '-9999em';
+      this._measureElement.textContent = 'W';
+    }
+
+    this._parentElement.appendChild(this._measureElement);
+    const geometry = this._measureElement.getBoundingClientRect();
+    this._width = geometry.width;
+    this._height = geometry.height;
+    this._parentElement.removeChild(this._measureElement);
+
+    if (this._width !== oldWidth || this._height !== oldHeight) {
+      this.emit('charsizechanged');
+    }
+  }
+}

src/utils/Generic.ts

@@ -9,6 +9,6 @@
  * @param {Array} array The array to search for the given element.
  * @param {Object} el The element to look for into the array
  */
-export let contains = function(arr, el) {
+export function contains(arr: any[], el: any) {
   return arr.indexOf(el) >= 0;
 };