From c03b24fc01daae1e8a6b726d1a1c4eba403bbe61 Mon Sep 17 00:00:00 2001
From: Vanessa <lly219@gmail.com>
Date: Wed, 28 Sep 2022 21:20:47 +0800
Subject: [PATCH] :bug: fix https://github.com/siyuan-note/siyuan/issues/6007

---
 app/src/protyle/toolbar/InlineMath.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/app/src/protyle/toolbar/InlineMath.ts b/app/src/protyle/toolbar/InlineMath.ts
index dc834c2b2..663a9c09e 100644
--- a/app/src/protyle/toolbar/InlineMath.ts
+++ b/app/src/protyle/toolbar/InlineMath.ts
@@ -25,21 +25,24 @@ export class InlineMath extends ToolbarItem {
             }
             if (!mathElement && range.startOffset === range.startContainer.textContent.length && range.startContainer.nodeType === 3) {
                 let isMath = true;
+                let hasMath = false;
+                // https://github.com/siyuan-note/siyuan/issues/6007
                 range.cloneContents().childNodes.forEach((item: HTMLElement) => {
                     if ((item.nodeType !== 3 && item.getAttribute("data-type").indexOf("inline-math") > -1) ||
                         (item.nodeType == 3 && item.textContent === "")) {
                         // 是否仅选中数学公式
+                        hasMath = true;
                     } else {
                         isMath = false;
                     }
                 });
-                if (isMath) {
+                if (isMath && hasMath) {
                     const nextSibling = hasNextSibling(range.startContainer) as HTMLElement;
                     if (nextSibling && nextSibling.nodeType !== 3 && nextSibling.getAttribute("data-type").indexOf("inline-math") > -1) {
                         mathElement = nextSibling;
                     } else {
                         const previousSibling = hasPreviousSibling(range.startContainer) as HTMLElement;
-                        if (previousSibling && previousSibling.nodeType !== 3 && previousSibling.getAttribute("data-type").indexOf("inline-math") > -1) {
+                        if (range.startOffset === 0 && previousSibling && previousSibling.nodeType !== 3 && previousSibling.getAttribute("data-type").indexOf("inline-math") > -1) {
                             mathElement = previousSibling;
                         }
                     }