Create new event with emitter object to simplify code

src/common/buffer/Buffer.test.ts

@@ -1071,7 +1071,7 @@ describe('Buffer', () => {
       buffer.fillViewportRows();
       const marker = buffer.addMarker(buffer.lines.length - 1);
       assert.equal(marker.line, buffer.lines.length - 1);
-      buffer.lines.onTrimEmitter.fire(1);
+      buffer.lines.onTrim.fire(1);
       assert.equal(marker.line, buffer.lines.length - 2);
     });
     it('should dispose of a marker if it is trimmed off the buffer', () => {
@@ -1081,7 +1081,7 @@ describe('Buffer', () => {
       const marker = buffer.addMarker(0);
       assert.equal(marker.isDisposed, false);
       assert.equal(buffer.markers.length, 1);
-      buffer.lines.onTrimEmitter.fire(1);
+      buffer.lines.onTrim.fire(1);
       assert.equal(marker.isDisposed, true);
       assert.equal(buffer.markers.length, 0);
     });
@@ -1094,7 +1094,7 @@ describe('Buffer', () => {
       marker.onDispose(() => eventStack.push('disposed'));
       assert.equal(marker.isDisposed, false);
       assert.equal(buffer.markers.length, 1);
-      buffer.lines.onTrimEmitter.fire(1);
+      buffer.lines.onTrim.fire(1);
       assert.equal(marker.isDisposed, true);
       assert.equal(buffer.markers.length, 0);
       assert.deepEqual(eventStack, ['disposed']);

src/common/buffer/Buffer.ts

@@ -463,12 +463,12 @@ export class Buffer implements IBuffer {
       let insertCountEmitted = 0;
       for (let i = insertEvents.length - 1; i >= 0; i--) {
         insertEvents[i].index += insertCountEmitted;
-        this.lines.onInsertEmitter.fire(insertEvents[i]);
+        this.lines.onInsert.fire(insertEvents[i]);
         insertCountEmitted += insertEvents[i].amount;
       }
       const amountToTrim = Math.max(0, originalLinesLength + countToInsert - this.lines.maxLength);
       if (amountToTrim > 0) {
-        this.lines.onTrimEmitter.fire(amountToTrim);
+        this.lines.onTrim.fire(amountToTrim);
       }
     }
   }

src/common/buffer/BufferReflow.ts

@@ -118,7 +118,7 @@ export function reflowLargerCreateNewLayout(lines: CircularList<IBufferLine>, to
       const countToRemove = toRemove[++nextToRemoveIndex];
 
       // Tell markers that there was a deletion
-      lines.onDeleteEmitter.fire({
+      lines.onDelete.fire({
         index: i - countRemovedSoFar,
         amount: countToRemove
       });

src/common/buffer/BufferSet.ts

@@ -6,7 +6,7 @@
 import { IBuffer, IBufferSet } from 'common/buffer/Types';
 import { IAttributeData } from 'common/Types';
 import { Buffer } from 'common/buffer/Buffer';
-import { EventEmitter, IEvent } from 'common/EventEmitter';
+import { EventEmitter, IEvent, initEvent } from 'common/EventEmitter';
 import { IOptionsService, IBufferService } from 'common/services/Services';
 import { Disposable } from 'common/Lifecycle';
 
@@ -19,8 +19,7 @@ export class BufferSet extends Disposable implements IBufferSet {
   private _alt!: Buffer;
   private _activeBuffer!: Buffer;
 
-  private readonly _onBufferActivate = this.register(new EventEmitter<{activeBuffer: IBuffer, inactiveBuffer: IBuffer}>());
-  public readonly onBufferActivate = this._onBufferActivate.event;
+  public readonly onBufferActivate = this.register(initEvent<{activeBuffer: IBuffer, inactiveBuffer: IBuffer}>());
 
   /**
    * Create a new BufferSet for the given terminal.
@@ -42,7 +41,7 @@ export class BufferSet extends Disposable implements IBufferSet {
     // See http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-The-Alternate-Screen-Buffer
     this._alt = new Buffer(false, this._optionsService, this._bufferService);
     this._activeBuffer = this._normal;
-    this._onBufferActivate.fire({
+    this.onBufferActivate.fire({
       activeBuffer: this._normal,
       inactiveBuffer: this._alt
     });
@@ -86,7 +85,7 @@ export class BufferSet extends Disposable implements IBufferSet {
     this._alt.clearAllMarkers();
     this._alt.clear();
     this._activeBuffer = this._normal;
-    this._onBufferActivate.fire({
+    this.onBufferActivate.fire({
       activeBuffer: this._normal,
       inactiveBuffer: this._alt
     });
@@ -105,7 +104,7 @@ export class BufferSet extends Disposable implements IBufferSet {
     this._alt.x = this._normal.x;
     this._alt.y = this._normal.y;
     this._activeBuffer = this._alt;
-    this._onBufferActivate.fire({
+    this.onBufferActivate.fire({
       activeBuffer: this._alt,
       inactiveBuffer: this._normal
     });

src/common/buffer/Marker.ts

@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { EventEmitter, IEvent } from 'common/EventEmitter';
+import { initEvent } from 'common/EventEmitter';
 import { Disposable } from 'common/Lifecycle';
 import { IMarker } from 'common/Types';
 
@@ -15,8 +15,7 @@ export class Marker extends Disposable implements IMarker {
 
   public get id(): number { return this._id; }
 
-  private readonly _onDispose = new EventEmitter<void>();
-  public readonly onDispose = this._onDispose.event;
+  public readonly onDispose = initEvent<void>();
 
   constructor(
     public line: number
@@ -31,7 +30,7 @@ export class Marker extends Disposable implements IMarker {
     this.isDisposed = true;
     this.line = -1;
     // Emit before super.dispose such that dispose listeners get a change to react
-    this._onDispose.fire();
+    this.onDispose.fire();
     super.dispose();
   }
 }