From cf97ed94a3cc2f1da459cf0329a3538410efe889 Mon Sep 17 00:00:00 2001
From: PathGao <42336971+PathGao@users.noreply.github.com>
Date: Thu, 16 Jul 2026 16:20:15 +0900
Subject: [PATCH] fix: pasting a URL over a selected URL replaces it instead of
 nesting
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Paste-as-link wraps the selection unconditionally: [selected](pasted).
When the selection is itself a URL — the natural gesture for swapping a
link target, including inside image syntax — this produces broken nesting
like ![]([old](new). Follow the editor convention (VS Code does the same)
and plain-replace when the selected text is already a URL.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 src/lib/components/Editor.svelte | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/lib/components/Editor.svelte b/src/lib/components/Editor.svelte
index b384ab5..32f635c 100644
--- a/src/lib/components/Editor.svelte
+++ b/src/lib/components/Editor.svelte
@@ -943,6 +943,17 @@
 				if (hasSelection) {
 					const edits = selections.map((selection) => {
 						const selectedText = model.getValueInRange(selection);
+						// Pasting a URL over a URL replaces it. Wrapping would
+						// nest the old URL as the link text — and inside
+						// existing link syntax like ![](url) it produces
+						// broken nesting: ![]([old](new)).
+						if (urlRegex.test(selectedText.trim())) {
+							return {
+								range: selection,
+								text,
+								forceMoveMarkers: true,
+							};
+						}
 						const linkUrl = text.toLowerCase().startsWith("www.")
 							? `http://${text}`
 							: text;