From db3c720b7833a1178cf0abc8b11fc06124fdcabc Mon Sep 17 00:00:00 2001 From: gavindiaz Date: Sat, 24 Oct 2026 19:27:58 +0800 Subject: [PATCH] =?UTF-8?q?fix:=20=E5=AF=BC=E5=87=BA=20flowchart=20?= =?UTF-8?q?=E5=89=8D=E6=8A=8A=E6=A0=87=E7=AD=BE=E4=B8=AD=E7=9A=84=20ASCII?= =?UTF-8?q?=20=E5=BC=95=E5=8F=B7=E6=9B=BF=E6=8D=A2=E4=B8=BA=E5=BC=AF?= =?UTF-8?q?=E5=BC=95=E5=8F=B7?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 老版 mermaid 的 flowchart 解析器不认 ["...\\"..."] 转义，标签里的英文 双引号会把字符串截断导致 Parse error（如 "产生\"关于数字\"的算术意义"）。 现把标签内的 " / ' 交替替换为弯引号（“”/‘’），反斜杠转斜杠、# 转全角， 老版阅读器即可正常渲染且保留原语义。 Co-Authored-By: Claude Code --- backend/app/api/chat.py | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/backend/app/api/chat.py b/backend/app/api/chat.py index 62e59cf..4958a13 100644 --- a/backend/app/api/chat.py +++ b/backend/app/api/chat.py @@ -396,6 +396,30 @@ def _transform_mindmaps(text: str) -> str: return _FENCE_RE.sub(_repl, text) +_LABEL_QUOTES = {"d": True, "s": True} + + +def _safe_label(label: str) -> str: + """把会破坏老版 mermaid flowchart 语法的字符替换为可安全渲染的等价字符。 + + - ASCII 双/单引号 → 弯引号（“”/‘’）：老版 mermaid 不认 ["...\\"..."] 转义， + 引号会把字符串截断导致 Parse error；弯引号是普通 Unicode，可正常渲染且保留语义。 + - 反斜杠 → 斜杠；# → 全角＃（老版 mermaid 中 # 有特殊含义）。 + """ + states = dict(_LABEL_QUOTES) + + def _rep(m: re.Match) -> str: + ch = m.group(0) + key = "d" if ch == '"' else "s" + pair = ("“", "”") if key == "d" else ("‘", "’") + idx = 0 if states[key] else 1 + states[key] = not states[key] + return pair[idx] + + label = re.sub(r'["\']', _rep, label) + return label.replace("\\", "/").replace("#", "＃") + + def _mindmap_to_flowchart(body: str) -> str: """mindmap（缩进式）→ flowchart LR（节点 + 边）。 @@ -448,7 +472,7 @@ def _mindmap_to_flowchart(body: str) -> str: while stack and stack[-1][0] >= indent_len: stack.pop() nid = _new_id() - safe = label.replace("\\", "\\\\").replace('"', '\\"').replace("\n", " ") + safe = _safe_label(label).replace("\n", " ") out.append(f' {nid}["{safe}"]') if stack: out.append(f" {stack[-1][1]} --> {nid}")