Remove ITerminal dependency in RenderDebouncer

src/ui/RenderDebouncer.ts

@@ -1,4 +1,8 @@
-import { ITerminal } from '../Types';
+/**
+ * Copyright (c) 2018 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
 import { IDisposable } from 'xterm';
 
 /**
@@ -7,10 +11,10 @@ import { IDisposable } from 'xterm';
 export class RenderDebouncer implements IDisposable {
   private _rowStart: number;
   private _rowEnd: number;
+  private _rowCount: number;
   private _animationFrame: number = null;
 
   constructor(
-    private _terminal: ITerminal,
     private _callback: (start: number, end: number) => void
   ) {
   }
@@ -22,10 +26,11 @@ export class RenderDebouncer implements IDisposable {
     }
   }
 
-  public refresh(rowStart: number, rowEnd: number): void {
+  public refresh(rowStart: number, rowEnd: number, rowCount: number): void {
+    this._rowCount = rowCount;
     // Get the min/max row start/end for the arg values
     rowStart = rowStart !== null && rowStart !== undefined ? rowStart : 0;
-    rowEnd = rowEnd !== null && rowEnd !== undefined ? rowEnd : this._terminal.rows - 1;
+    rowEnd = rowEnd !== null && rowEnd !== undefined ? rowEnd : this._rowCount - 1;
     // Check whether the row start/end values have already been set
     const isRowStartSet = this._rowStart !== undefined && this._rowStart !== null;
     const isRowEndSet = this._rowEnd !== undefined && this._rowEnd !== null;
@@ -43,7 +48,7 @@ export class RenderDebouncer implements IDisposable {
   private _innerRefresh(): void {
     // Clamp values
     this._rowStart = Math.max(this._rowStart, 0);
-    this._rowEnd = Math.min(this._rowEnd, this._terminal.rows - 1);
+    this._rowEnd = Math.min(this._rowEnd, this._rowCount - 1);
 
     // Run render callback
     this._callback(this._rowStart, this._rowEnd);