From 296d7d6b5e3568b2bcc305f0d78a2007cb298d5d Mon Sep 17 00:00:00 2001
From: umorigu <umorigu@gmail.com>
Date: Tue, 26 Sep 2017 04:04:00 +0900
Subject: [PATCH] Show no support message

---
 en.lng.php             |  2 ++
 ja.lng.php             |  2 ++
 plugin/search2.inc.php |  9 +++++++++
 skin/search2.js        | 14 ++++++++++++--
 4 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/en.lng.php b/en.lng.php
index 5d01765..470104b 100644
--- a/en.lng.php
+++ b/en.lng.php
@@ -53,6 +53,8 @@ $_msg_help        = 'View Text Formatting Rules';
 $_msg_week        = array('Sun','Mon','Tue','Wed','Thu','Fri','Sat');
 $_msg_content_back_to_top = '<div class="jumpmenu"><a href="#navigator">&uarr;</a></div>';
 $_msg_word        = 'These search terms have been highlighted:';
+$_msg_unsupported_webbrowser = 'This function doesn\'t support your current Web browser.';
+$_msg_use_alternative_link = 'Please go to the following link destination: $1';
 
 ///////////////////////////////////////
 // Symbols
diff --git a/ja.lng.php b/ja.lng.php
index f86aad3..0704d6c 100644
--- a/ja.lng.php
+++ b/ja.lng.php
@@ -55,6 +55,8 @@ $_msg_help           = 'テキスト整形のルールを表示する';
 $_msg_week           = array('日','月','火','水','木','金','土');
 $_msg_content_back_to_top = '<div class="jumpmenu"><a href="#navigator">&uarr;</a></div>';
 $_msg_word           = 'これらのキーワードがハイライトされています：';
+$_msg_unsupported_webbrowser = 'この機能はお使いのWebブラウザには対応していません。';
+$_msg_use_alternative_link = 'リンク先の機能をご利用ください: $1';
 
 ///////////////////////////////////////
 // Symbols
diff --git a/plugin/search2.inc.php b/plugin/search2.inc.php
index 05930b6..c6d0f1b 100644
--- a/plugin/search2.inc.php
+++ b/plugin/search2.inc.php
@@ -166,6 +166,7 @@ function plugin_search2_search_form($s_word = '', $type = '', $bases = array())
 	global $_search_pages, $_search_all;
 	global $_msg_andresult, $_msg_orresult, $_msg_notfoundresult;
 	global $_search_detail, $_search_searching;
+	global $_msg_unsupported_webbrowser, $_msg_use_alternative_link;
 
 	$script = get_base_uri();
 	$h_search_text = htmlsc($s_word);
@@ -211,7 +212,15 @@ EOD;
 		$result_page_panel = '';
 	}
 
+	$plain_search_link = '<a href="' . $script . '?cmd=search' . '">' . htmlsc($_btn_search) . '</a>';
+	$alt_msg = str_replace('$1', $plain_search_link, $_msg_use_alternative_link);
 	return <<<EOD
+<noscript>
+ <p>$_msg_unsupported_webbrowser $alt_msg</p>
+</noscript>
+<p class="_plugin_search2_nosupport_message" style="display:block;">
+  $_msg_unsupported_webbrowser $alt_msg
+</p>
 <form action="$script" method="GET" class="_plugin_search2_form">
  <div>
   <input type="hidden" name="cmd" value="search2">
diff --git a/skin/search2.js b/skin/search2.js
index ce4a0e2..766dcf1 100644
--- a/skin/search2.js
+++ b/skin/search2.js
@@ -553,8 +553,15 @@ window.addEventListener && window.addEventListener('DOMContentLoaded', function(
       var target = document.getElementById('body');
       walkElement(target);
     }
+    function showNoSupportMessage() {
+      var pList = document.getElementsByClassName('_plugin_search2_nosupport_message');
+      for (var i = 0; i < pList.length; i++) {
+        var p = pList[i];
+        p.style.display = 'block';
+      }
+    }
     function isEnabledFetchFunctions() {
-      if (window.fetch && document.querySelector) {
+      if (window.fetch && document.querySelector && window.JSON) {
         return true;
       }
       return false;
@@ -569,7 +576,10 @@ window.addEventListener && window.addEventListener('DOMContentLoaded', function(
       return false;
     }
     colorSearchTextInBody();
-    if (! isEnabledFetchFunctions()) return;
+    if (! isEnabledFetchFunctions()) {
+      showNoSupportMessage();
+      return;
+    }
     if (! isEnableServerFunctions()) return;
     replaceSearchWithSearch2();
     hookSearch2();
-- 
2.11.0