Enforce upper case for public const/enum members

Fixes #1406

src/handlers/AltClickHandler.ts

@@ -7,10 +7,10 @@ import { ITerminal, ICircularList, LineData } from '../Types';
 import { C0 } from '../EscapeSequences';
 
 enum Direction {
-  Up = 'A',
-  Down = 'B',
-  Right = 'C',
-  Left = 'D'
+  UP = 'A',
+  DOWN = 'B',
+  RIGHT = 'C',
+  LEFT = 'D'
 }
 
 export class AltClickHandler {
@@ -77,7 +77,7 @@ export class AltClickHandler {
       return repeat(this._bufferLine(
         this._startCol, this._startRow, this._startCol,
         this._startRow - this._wrappedRowsForRow(this._startRow), false
-      ).length, this._sequence(Direction.Left));
+      ).length, this._sequence(Direction.LEFT));
     }
   }
 
@@ -110,7 +110,7 @@ export class AltClickHandler {
 
     return repeat(this._bufferLine(
       this._startCol, startRow, this._endCol, endRow,
-      direction === Direction.Right
+      direction === Direction.RIGHT
     ).length, this._sequence(direction));
   }
 
@@ -133,7 +133,7 @@ export class AltClickHandler {
     let endRow = this._endRow - this._wrappedRowsForRow(this._endRow);
 
     for (let i = 0; i < Math.abs(startRow - endRow); i++) {
-      let direction = this._verticalDirection() === Direction.Up ? -1 : 1;
+      let direction = this._verticalDirection() === Direction.UP ? -1 : 1;
 
       if ((<any>this._lines.get(startRow + (direction * i))).isWrapped) {
         wrappedRows++;
@@ -179,9 +179,9 @@ export class AltClickHandler {
       startRow <= this._endRow) || // down/right or same y/right
       (this._startCol >= this._endCol &&
       startRow < this._endRow)) {  // down/left or same y/left
-      return Direction.Right;
+      return Direction.RIGHT;
     } else {
-      return Direction.Left;
+      return Direction.LEFT;
     }
   }
 
@@ -190,9 +190,9 @@ export class AltClickHandler {
    */
   private _verticalDirection(): Direction {
     if (this._startRow > this._endRow) {
-      return Direction.Up;
+      return Direction.UP;
     } else {
-      return Direction.Down;
+      return Direction.DOWN;
     }
   }