From c7aa2cb684be949bf0ae232cb6a3fa38b97f9adf Mon Sep 17 00:00:00 2001
From: sledgehammer999 <hammered999@gmail.com>
Date: Sun, 1 Sep 2013 20:42:44 +0300
Subject: [PATCH] Display a message when a link to a search plugin is invalid.
 Closes #892.

---
 src/searchengine/engineselectdlg.cpp | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/src/searchengine/engineselectdlg.cpp b/src/searchengine/engineselectdlg.cpp
index 5b4b24e7e..4bbef26d8 100644
--- a/src/searchengine/engineselectdlg.cpp
+++ b/src/searchengine/engineselectdlg.cpp
@@ -326,14 +326,26 @@ void engineSelectDlg::on_installButton_clicked() {
 }
 
 void engineSelectDlg::askForPluginUrl() {
-  bool ok;
+  bool ok(false);
   QString url = AutoExpandableDialog::getText(this, tr("New search engine plugin URL"),
                                       tr("URL:"), QLineEdit::Normal,
                                       "http://", &ok);
-  if (ok && !url.isEmpty()) {
-    setCursor(QCursor(Qt::WaitCursor));
-    downloader->downloadUrl(url);
+
+  while(true) {
+    if (!ok || url.isEmpty())
+      return;
+    if (!url.endsWith(".py")) {
+      QMessageBox::warning(this, tr("Invlalid link"), tr("The link doesn't seem to point to a search engine plugin."));
+      url = AutoExpandableDialog::getText(this, tr("New search engine plugin URL"),
+                                            tr("URL:"), QLineEdit::Normal,
+                                            url, &ok);
+    }
+    else
+      break;
   }
+
+  setCursor(QCursor(Qt::WaitCursor));
+  downloader->downloadUrl(url);
 }
 
 void engineSelectDlg::askForLocalPlugin() {