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Add null checks to fix trim related crash

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This commit is contained in:
Daniel Imms
2017-05-25 09:55:08 -07:00
parent b3b2bd1faf
commit 3846fe0a7d
1 changed files with 8 additions and 4 deletions
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src/SelectionManager.ts
+8 -4
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@@ -131,11 +131,15 @@ export class SelectionManager extends EventEmitter {
*/
private _onTrim(amount: number) {
// Adjust the selection position based on the trimmed amount.
this._selectionStart[0] -= amount;
this._selectionEnd[0] -= amount;
if (this._selectionStart) {
this._selectionStart[0] -= amount;
}
if (this._selectionEnd) {
this._selectionEnd[0] -= amount;
}
// The selection has moved off the buffer, clear it.
if (this._selectionEnd[0] < 0) {
if (this._selectionEnd && this._selectionEnd[0] < 0) {
this._selectionStart = null;
this._selectionEnd = null;
this.refresh();
@@ -143,7 +147,7 @@ export class SelectionManager extends EventEmitter {
}
// If the selection start is trimmed, ensure the start column is 0.
if (this._selectionStart[0] < 0) {
if (this._selectionStart && this._selectionStart[0] < 0) {
this._selectionStart[1] = 0;
}
}