From cafde0723353715daa76eab6596ee5eb75f9993c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=A9=AC=E4=B8=80=E4=B8=81?= <1769123563@qq.com>
Date: Wed, 19 Nov 2025 16:12:43 +0800
Subject: [PATCH] Resolves Display Issues with Pie Charts and Line Charts When
 Exporting to PDF

---
 ReportEngine/renderers/chart_to_svg.py | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/ReportEngine/renderers/chart_to_svg.py b/ReportEngine/renderers/chart_to_svg.py
index 084323e..719ddc0 100644
--- a/ReportEngine/renderers/chart_to_svg.py
+++ b/ReportEngine/renderers/chart_to_svg.py
@@ -155,7 +155,7 @@ class ChartToSVGConverter:
         解析颜色值，将CSS格式转换为matplotlib支持的格式
 
         参数:
-            color: 颜色值（可能是CSS格式如rgba()或十六进制）
+            color: 颜色值（可能是CSS格式如rgba()或十六进制或CSS变量）
 
         返回:
             str: matplotlib支持的颜色格式
@@ -165,6 +165,12 @@ class ChartToSVGConverter:
 
         color = color.strip()
 
+        # 【修复】处理CSS变量，例如 var(--color-accent)
+        # 使用默认颜色替代CSS变量
+        if color.startswith('var('):
+            # 返回默认的蓝色
+            return '#36A2EB'
+
         # 处理rgba(r, g, b, a)格式
         rgba_pattern = r'rgba\((\d+),\s*(\d+),\s*(\d+),\s*([\d.]+)\)'
         match = re.match(rgba_pattern, color)
@@ -367,6 +373,9 @@ class ChartToSVGConverter:
             if not isinstance(colors, list):
                 colors = self.DEFAULT_COLORS[:len(labels)]
 
+            # 【修复】解析每个颜色，将CSS格式转换为matplotlib格式
+            colors = [self._parse_color(c) for c in colors]
+
             # 绘制饼图
             wedges, texts, autotexts = ax.pie(
                 dataset_data,
@@ -418,6 +427,9 @@ class ChartToSVGConverter:
             if not isinstance(colors, list):
                 colors = self.DEFAULT_COLORS[:len(labels)]
 
+            # 【修复】解析每个颜色，将CSS格式转换为matplotlib格式
+            colors = [self._parse_color(c) for c in colors]
+
             # 绘制圆环图（通过设置wedgeprops实现中空效果）
             wedges, texts, autotexts = ax.pie(
                 dataset_data,