+ index.js

index.js

@@ -0,0 +1,64 @@
+// [[kbd]]
+//
+
+const MARKER_OPEN = '[';
+const MARKER_CLOSE = ']';
+const TAG = 'kbd';
+
+/*
+ * Add delimiters for double occurences of MARKER_SYMBOL.
+ */
+function tokenize(state, silent) {
+	if (silent) {
+		return false;
+	}
+
+	const start = state.pos;
+	const max = state.posMax;
+	let momChar = state.src.charAt(start);
+	let nextChar = state.src.charAt(start + 1);
+
+	// we're looking for two times the open symbol.
+	if (momChar !== MARKER_OPEN || nextChar !== MARKER_OPEN) {
+		return false;
+	}
+
+	// find the end sequence
+	let end = -1;
+	nextChar = state.src.charAt(start + 2);
+	for (let i = start + 2; i < max && end === -1; i++) {
+		momChar = nextChar;
+		nextChar = state.src.charAt(i+1);
+		if (momChar === MARKER_CLOSE && nextChar === MARKER_CLOSE) {
+			// found the end!
+			end = i;
+		}
+		if (momChar === MARKER_OPEN && momChar === MARKER_OPEN) {
+			// found another opening sequence before the end. Thus, ignore ours!
+			return false;
+		}
+		if (momChar === '\n') {
+			// found end of line before the end sequence. Thus, ignore our start sequence!
+			return false;
+		}
+	}
+
+	// start tag
+	state.push('kbd', TAG, 1);
+	// parse inner
+	state.pos += 2;
+	state.posMax = end;
+	state.md.inline.tokenize(state);
+	state.pos = end + 2;
+	state.posMax = max;
+	// end tag
+	state.push('kbd', TAG, -1);
+
+	return true;
+}
+
+function kbdplugin(markdownit) {
+	markdownit.inline.ruler.before('link', 'kbd', tokenize);
+}
+
+export default kbdplugin;