feat: 内置mathjax可以被关闭

Relate to mirai-mamori/Sakurairo#1328
Relate to mirai-mamori/Sakurairo#1333

Author: KotoriK

src/global.d.ts

@@ -80,6 +80,7 @@ declare namespace _iro {
     const skin_bg4: string
     const meting_api_url: string | undefined
     const code_highlight: "prism" | "hljs" | "custom"
+    const theme_mathjax: boolean
     const code_highlight_prism: {
         line_number_all: boolean
         autoload_path: string,

src/page/artile_attachment/math.ts

@@ -1,25 +1,31 @@
 import { resolvePath } from '../../common/npmLib'
 
 export default async function math() {
-    if (document.getElementsByTagName('math').length > 0 || document.querySelector('article > div.entry-content')?.textContent.match(/(?:\$|\\\(|\\\[|\\begin\{.*?})/)) {
-        const mathjaxConfig = {
-            tex: {
-                inlineMath: [['$', '$'], ['\\(', '\\)']]
-            },
-            startup: {
-                typeset: false,           // Perform initial typeset?
-            },
-            chtml: {
-                fontURL: resolvePath('es5/output/chtml/fonts/woff-v2', 'mathjax'),
-                mathmlSpacing: true// true for MathML spacing rules, false for TeX rules
-            }
-        }
+    if (_iro.theme_mathjax &&
+        (
+            document.getElementsByTagName('math').length > 0 ||
+            document.querySelector('article > div.entry-content')?.textContent.match(/(?:\$|\\\(|\\\[|\\begin\{.*?})/)
+        )
+    ) {
         if (!('MathJax' in window)) {
+            const mathjaxConfig = {
+                tex: {
+                    inlineMath: [['$', '$'], ['\\(', '\\)']]
+                },
+                startup: {
+                    typeset: false,           // Perform initial typeset?
+                },
+                chtml: {
+                    fontURL: resolvePath('es5/output/chtml/fonts/woff-v2', 'mathjax'),
+                    mathmlSpacing: true// true for MathML spacing rules, false for TeX rules
+                }
+            }
             //@ts-ignore
             window.MathJax = mathjaxConfig
         }
         //@ts-ignore
-        await import('mathjax/es5/tex-mml-chtml')        //@ts-ignore
+        await import('mathjax/es5/tex-mml-chtml')
+        //@ts-ignore
         window.MathJax.typesetPromise()
     }
 }