Merge branch 'master' into secondpropertiesmenu-emily

1 files changed, 14 insertions, 12 deletions

diff --git a/src/client/views/PreviewCursor.tsx b/src/client/views/PreviewCursor.tsx
index b513fe245..82d2bff56 100644
--- a/src/client/views/PreviewCursor.tsx
+++ b/src/client/views/PreviewCursor.tsx
@@ -50,18 +50,20 @@ export class PreviewCursor extends React.Component<{}> {
                     PreviewCursor._slowLoadDocuments?.(plain.split('v=')[1].split('&')[0], options, generatedDocuments, '', undefined, PreviewCursor._addDocument).then(batch.end);
                 } else if (re.test(plain)) {
                     const url = plain;
-                    undoBatch(() =>
-                        PreviewCursor._addDocument(
-                            Docs.Create.WebDocument(url, {
-                                title: url,
-                                _width: 500,
-                                _height: 300,
-                                data_useCors: true,
-                                x: newPoint[0],
-                                y: newPoint[1],
-                            })
-                        )
-                    )();
+                    if (url.startsWith(window.location.href)) {
+                        undoBatch(() =>
+                            PreviewCursor._addDocument(
+                                Docs.Create.WebDocument(url, {
+                                    title: url,
+                                    _width: 500,
+                                    _height: 300,
+                                    data_useCors: true,
+                                    x: newPoint[0],
+                                    y: newPoint[1],
+                                })
+                            )
+                        )();
+                    } else alert('cannot paste dash into itself');
                 } else if (plain.startsWith('__DashDocId(') || plain.startsWith('__DashCloneId(')) {
                     const clone = plain.startsWith('__DashCloneId(');
                     const docids = plain.split(':');