From 375ff7128dbb744e9fb77ab31d4966dbf36d1ea8 Mon Sep 17 00:00:00 2001
From: Peter Surda <surda@economicsofbitcoin.com>
Date: Mon, 29 Feb 2016 07:47:07 +0800
Subject: [PATCH] Clickable email and http links in plain text

Email addresses and URIs are now clickable when viewing a message in
plain text mode. Clicking an email address moves to the Send tab, while
clicking an URI has the same result as clicking an URI in html mode, it
will ask for confirmation before opening it in external handler.
---
 src/bitmessageqt/messageview.py    | 11 +++++++++++
 src/bitmessageqt/safehtmlparser.py | 11 ++++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/bitmessageqt/messageview.py b/src/bitmessageqt/messageview.py
index a579dd13..66aac2cb 100644
--- a/src/bitmessageqt/messageview.py
+++ b/src/bitmessageqt/messageview.py
@@ -1,5 +1,6 @@
 from PyQt4 import QtCore, QtGui
 
+from urlparse import urlparse
 from safehtmlparser import *
 
 class MessageView(QtGui.QTextBrowser):
@@ -42,6 +43,16 @@ class MessageView(QtGui.QTextBrowser):
             QtGui.QApplication.activeWindow().statusBar().showMessage(QtGui.QApplication.translate("MainWindow", "Zoom level %1%").arg(str(zoom)))
 
     def confirmURL(self, link):
+        if link.scheme() == "mailto":
+            QtGui.QApplication.activeWindow().ui.lineEditTo.setText(link.path())
+            if link.hasQueryItem("subject"):
+                QtGui.QApplication.activeWindow().ui.lineEditSubject.setText(link.queryItemValue("subject"))
+            if link.hasQueryItem("body"):
+                QtGui.QApplication.activeWindow().ui.textEditMessage.setText(link.queryItemValue("body"))
+            QtGui.QApplication.activeWindow().ui.tabWidgetSend.setCurrentIndex(0)
+            QtGui.QApplication.activeWindow().ui.tabWidget.setCurrentIndex(1)
+            QtGui.QApplication.activeWindow().ui.textEditMessage.setFocus()
+            return
         reply = QtGui.QMessageBox.warning(self,
             QtGui.QApplication.translate(type(self).__name__, MessageView.CONFIRM_TITLE),
             QtGui.QApplication.translate(type(self).__name__, MessageView.CONFIRM_TEXT).arg(str(link.toString())), 
diff --git a/src/bitmessageqt/safehtmlparser.py b/src/bitmessageqt/safehtmlparser.py
index 79ad0f73..78f89888 100644
--- a/src/bitmessageqt/safehtmlparser.py
+++ b/src/bitmessageqt/safehtmlparser.py
@@ -1,5 +1,6 @@
 from HTMLParser import HTMLParser
 import inspect
+import re
 from urllib import quote, quote_plus
 from urlparse import urlparse
 
@@ -20,6 +21,9 @@ class SafeHTMLParser(HTMLParser):
                            'th', 'thead', 'tr', 'tt', 'u', 'ul', 'var', 'video']
     replaces = [["&", "&amp;"], ["\"", "&quot;"], ["<", "&lt;"], [">", "&gt;"], ["\n", "<br/>"], ["\t", "&nbsp;&nbsp;&nbsp;&nbsp;"], ["  ", "&nbsp; "], ["  ", "&nbsp; "], ["<br/> ", "<br/>&nbsp;"]]
     src_schemes = [ "data" ]
+    uriregex1 = re.compile(r'(\b(?:https?|telnet|gopher|file|wais|ftp):[\w/#~:.?+=&%@!\-.:;?\\-]+?(?=[.:?\-]*(?:[^\w/#~:;.?+=&%@!\-.:?\-]|$)))')
+    uriregex2 = re.compile(r'<a href="([^"]+)&amp;')
+    emailregex = re.compile(r'\b([A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,})\b')
 
     @staticmethod
     def multi_replace(text):
@@ -88,7 +92,12 @@ class SafeHTMLParser(HTMLParser):
     def feed(self, data):
         HTMLParser.feed(self, data)
         tmp = SafeHTMLParser.multi_replace(data)
-        self.raw += unicode(tmp, 'utf-8', 'replace')
+        tmp = SafeHTMLParser.uriregex1.sub(
+                r'<a href="\1">\1</a>',
+                unicode(tmp, 'utf-8', 'replace'))
+        tmp = SafeHTMLParser.uriregex2.sub(r'<a href="\1&', tmp)
+        tmp = SafeHTMLParser.emailregex.sub(r'<a href="mailto:\1">\1</a>', tmp)
+        self.raw += tmp
 
     def is_html(self, text = None, allow_picture = False):
         if text: