TextSource* API update (#1255)

* Add collapse function to TextSource*

* Add isConnected getter to TextSource*

1 files changed, 12 insertions, 0 deletions

diff --git a/ext/fg/js/text-source-range.js b/ext/fg/js/text-source-range.js
index 60086e7f..377016da 100644
--- a/ext/fg/js/text-source-range.js
+++ b/ext/fg/js/text-source-range.js
@@ -41,6 +41,13 @@ class TextSourceRange {
         return this._imposterSourceElement;
     }
 
+    get isConnected() {
+        return (
+            this._range.startContainer.isConnected &&
+            this._range.endContainer.isConnected
+        );
+    }
+
     clone() {
         return new TextSourceRange(this._range.cloneRange(), this._content, this._imposterContainer, this._imposterSourceElement);
     }
@@ -74,6 +81,11 @@ class TextSourceRange {
         return length - state.remainder;
     }
 
+    collapse(toStart) {
+        this._range.collapse(toStart);
+        this._content = '';
+    }
+
     getRect() {
         return this._range.getBoundingClientRect();
     }