Improve markdown editor

2026-04-15 09:14:24 +02:00
parent c7d5db7af7
commit b3ca714597
6 changed files with 564 additions and 14 deletions
--- a/assets/editor/lists.js
+++ b/assets/editor/lists.js
@@ -0,0 +1,86 @@
+window.EditorLists = (function () {
+
+    function detectListPrefix(lineText) {
+        var m;
+        m = lineText.match(/^(\s*)(- \[[ x]\] )/);
+        if (m) return { indent: m[1], prefix: m[2], type: 'task' };
+        m = lineText.match(/^(\s*)([-*+] )/);
+        if (m) return { indent: m[1], prefix: m[2], type: 'unordered' };
+        m = lineText.match(/^(\s*)(\d+)\. /);
+        if (m) return { indent: m[1], prefix: m[2] + '. ', type: 'ordered', num: parseInt(m[2], 10) };
+        m = lineText.match(/^(\s*)(> )/);
+        if (m) return { indent: m[1], prefix: m[2], type: 'blockquote' };
+        return null;
+    }
+
+    function continuationPrefix(info) {
+        if (info.type === 'task') return info.indent + '- [ ] ';
+        if (info.type === 'ordered') return info.indent + (info.num + 1) + '. ';
+        return info.indent + info.prefix;
+    }
+
+    function renumberOrderedList(text, fromLineIndex, indent, startNum) {
+        var lines = text.split('\n');
+        var re = new RegExp('^' + indent.replace(/[.*+?^${}()|[\]\\]/g, '\\$&') + '(\\d+)\\. ');
+        var num = startNum !== undefined ? startNum : null;
+        for (var i = fromLineIndex; i < lines.length; i++) {
+            var m = lines[i].match(re);
+            if (!m) break;
+            if (num === null) num = parseInt(m[1], 10);
+            var newNumStr = String(num);
+            if (m[1] !== newNumStr) {
+                lines[i] = indent + newNumStr + '. ' + lines[i].slice(m[0].length);
+            }
+            num++;
+        }
+        return lines.join('\n');
+    }
+
+    function handleEnterKey(text, cursorPos) {
+        var before = text.slice(0, cursorPos);
+        var after = text.slice(cursorPos);
+        var lineStart = before.lastIndexOf('\n') + 1;
+        var lineEnd = text.indexOf('\n', cursorPos);
+        if (lineEnd === -1) lineEnd = text.length;
+        var fullLine = text.slice(lineStart, lineEnd);
+        var info = detectListPrefix(fullLine);
+        if (!info) return null;
+
+        var contentAfterPrefix = fullLine.slice(info.indent.length + info.prefix.length);
+        if (contentAfterPrefix.trim() === '') {
+            var newText = text.slice(0, lineStart) + '\n' + after;
+            var newCursor = lineStart + 1;
+            if (info.type === 'ordered') {
+                var lineIndex = text.slice(0, lineStart).split('\n').length;
+                newText = renumberOrderedList(newText, lineIndex, info.indent);
+            }
+            return { text: newText, cursor: newCursor };
+        }
+
+        var cont = continuationPrefix(info);
+        var newText = before + '\n' + cont + after;
+        var newCursor = cursorPos + 1 + cont.length;
+        if (info.type === 'ordered') {
+            var insertedLineIndex = before.split('\n').length;
+            newText = renumberOrderedList(newText, insertedLineIndex, info.indent);
+        }
+        return { text: newText, cursor: newCursor };
+    }
+
+    function deleteOrderedLine(text, cursorPos) {
+        var lineStart = text.lastIndexOf('\n', cursorPos - 1) + 1;
+        var lineEnd = text.indexOf('\n', cursorPos);
+        if (lineEnd === -1) lineEnd = text.length;
+        var fullLine = text.slice(lineStart, lineEnd);
+        var info = detectListPrefix(fullLine);
+        if (!info || info.type !== 'ordered') return null;
+
+        var newText = text.slice(0, lineStart) + text.slice(lineEnd === text.length ? lineEnd : lineEnd + 1);
+        var newCursor = lineStart;
+        var fromLineIndex = text.slice(0, lineStart).split('\n').length - 1;
+        newText = renumberOrderedList(newText, fromLineIndex, info.indent, info.num);
+        return { text: newText, cursor: Math.min(newCursor, newText.length) };
+    }
+
+    return { handleEnterKey: handleEnterKey, deleteOrderedLine: deleteOrderedLine };
+})();