diff --git a/CrossDown/Core.py b/CrossDown/Core.py
index a532a9c..1a401b9 100644
--- a/CrossDown/Core.py
+++ b/CrossDown/Core.py
@@ -31,9 +31,8 @@ Extensions = {
}
try: # 检测当前平台是否支持扩展语法
- import Extra
-
- Extensions += Extra.EXTRA
+ from .Extra import *
+ EXTRA_ABLE = True
except ModuleNotFoundError:
EXTRA_ABLE = False
@@ -206,9 +205,20 @@ class CodeLine(Treeprocessor):
elem.remove(code)
elif re.match(r'¥[^$]*¥', code.text): # 是数学函数(单行)
if EXTRA_ABLE:
- expression, range_ = re.findall(r'¥([^$]*)¥(€[^$]*€)?', code)[0] # 分离表达式与范围(如果有)
+ expression, range_ = re.findall(r'¥([^$]*)¥(€[^$]*€)?', code.text)[0] # 分离表达式与范围(如果有)
x_r = (-10, 10)
y_r = (-20, 20)
+ if range_ != '': # 定义了范围
+ ranges = range_[1:-1].split('|')
+ if len(ranges) in (1, 2): # 定义的范围正确
+ x_r = tuple(int(i) for i in ranges[0].split(','))
+ if len(ranges) == 2: # 定义了y范围
+ y_r = tuple(int(i) for i in ranges[1].split(','))
+ code.tag = 'img'
+ code.set('src', f"""data:image/png;base64,{(function_drawing(
+ function=lambda x: eval(expression.split('=')[1]), x_range=x_r, y_range=y_r
+ ))}""") # 绘制函数图像
+ code.set('alt', 'Base64 函数图片')
elif re.match(r'\{[^$]*}', code.text): # 是强调
code.tag = 'span'
code.set('class', 'block')
diff --git a/CrossDown/Extra.py b/CrossDown/Extra.py
index 45f343c..40efbb1 100644
--- a/CrossDown/Extra.py
+++ b/CrossDown/Extra.py
@@ -1,3 +1,43 @@
+import matplotlib.pyplot as plt
+import numpy as np
+import base64
+from io import BytesIO
+
+
EXTRA = [
]
+
+
+def function_drawing(function, x_range=(-10, 10), y_range=(-20, 20), dpi=100):
+ # 创建一个图像和坐标轴对象
+ fig, ax = plt.subplots()
+
+ # 生成x值
+ x = np.linspace(x_range[0], x_range[1], 400)
+
+ # 计算y值
+ y = function(x)
+
+ # 绘制图像
+ ax.plot(x, y)
+
+ # 设置坐标轴范围
+ ax.set_xlim(x_range)
+ ax.set_ylim(y_range)
+
+ # 隐藏坐标轴
+ ax.axis('on')
+
+ # 将图像保存到BytesIO对象
+ buf = BytesIO()
+ fig.savefig(buf, format='png', dpi=dpi)
+
+ # 获取图像数据的Base64编码
+ data = base64.b64encode(buf.getbuffer()).decode("ascii")
+
+ # 关闭图像和坐标轴对象
+ plt.close(fig)
+
+ # 返回Base64编码的字符串
+ return data
diff --git a/README.html b/README.html
index f284751..5e80a9e 100644
--- a/README.html
+++ b/README.html
@@ -175,9 +175,9 @@
这是\(CO_2\)二氧化碳
这是\(H_2O\)水
4.1.2 函数
- ¥y=x*2+1¥ // 不定义范围
- ¥y=x**2¥€-50,50€ // 定义了x范围
- ¥y=x**3¥€-50,50|-100,100€ // 定义了y范围
+ 
// 不定义范围
+ 
// 定义了x范围
+ 
// 定义了y范围
4.1.3 强调
强调文本
4.2 多行