update at 2025-09-22 13:55:41

src/markdown/link.ts

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2024-2025 Sun Booshi
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import { Tokens, MarkedExtension } from "marked";
+import { Extension } from "./extension";
+
+export class LinkRenderer extends Extension {
+    allLinks:string[] = [];
+    async prepare() {
+       this.allLinks = [];
+    }
+
+    async postprocess(html: string) {
+        if (this.settings.linkStyle !== 'footnote'
+            || this.allLinks.length == 0) {
+            return html;
+        }
+        
+        const links = this.allLinks.map((href, i) => {
+            return `<li>${href}&nbsp;↩</li>`;
+        });
+        return `${html}<seciton class="footnotes"><hr><ol>${links.join('')}</ol></section>`;
+    }
+
+    markedExtension(): MarkedExtension {
+        return {
+            extensions: [{
+                name: 'link',
+                level: 'inline',
+                renderer: (token: Tokens.Link) => {
+                    if (token.href.startsWith('mailto:')) {
+                        return token.text;
+                    }
+                    if (token.text.indexOf(token.href) === 0
+                        || (token.href.indexOf('https://mp.weixin.qq.com/mp') === 0)
+                        || (token.href.indexOf('https://mp.weixin.qq.com/s') === 0)) {
+                        return `<a href="${token.href}">${token.text}</a>`;
+                    }
+                    this.allLinks.push(token.href);
+                    if (this.settings.linkStyle == 'footnote') {
+                        return `<a>${token.text}<sup>[${this.allLinks.length}]</sup></a>`;
+                    }
+                    else {
+                        return `<a>${token.text}[${token.href}]</a>`;
+                    }
+                }
+            }]
+        }
+    }
+}