From 7bec5e52becc97c4963318953ae62cefacb41339 Mon Sep 17 00:00:00 2001
From: syuilo <syuilotan@yahoo.co.jp>
Date: Thu, 9 Feb 2017 21:47:45 +0900
Subject: [PATCH] regexp support

---
 src/common/text/elements/code.js | 29 +++++++++++++++++++++++++++++
 src/web/app/base.styl            |  3 +++
 2 files changed, 32 insertions(+)

diff --git a/src/common/text/elements/code.js b/src/common/text/elements/code.js
index a94681098a..d6dbd1cdcb 100644
--- a/src/common/text/elements/code.js
+++ b/src/common/text/elements/code.js
@@ -132,6 +132,35 @@ const elements = [
 		}
 	},
 
+	// regexp
+	code => {
+		if (code[0] != '/') return null;
+		let regexp = '';
+		let thisIsNotARegexp = false;
+		for (let i = 1; i < code.length; i++) {
+			const char = code[i];
+			if (char == '\\') {
+				i++;
+				continue;
+			} else if (char == '/') {
+				break;
+			} else if (char == '\n' || i == (code.length - 1)) {
+				thisIsNotARegexp = true;
+				break;
+			} else {
+				regexp += char;
+			}
+		}
+		
+		if (thisIsNotARegexp) return null;
+		if (regexp[0] == ' ' && regexp[regexp.length - 1] == ' ') return null;
+
+		return {
+			html: `<span class="regexp">/${escape(regexp)}/</span>`,
+			next: regexp.length + 2
+		};
+	},
+
 	// extract vars
 	(code, i, source, vars) => {
 		const prev = source[i - 1];
diff --git a/src/web/app/base.styl b/src/web/app/base.styl
index 4b107a2c98..1e26a9f85c 100644
--- a/src/web/app/base.styl
+++ b/src/web/app/base.styl
@@ -117,6 +117,9 @@ pre > code
 	.string
 		color #e96900
 
+	.regexp
+		color #e9003f
+
 	.keyword
 		color #2973b7