[evolution] I#1070 - Improve URL scanner (detect angle brackets)

[Milan Crha <mcrha src gnome org>]

commit 3dcada1fe0667a4b429542c31a21befe26586601
Author: Milan Crha <mcrha redhat com>
Date:   Wed Sep 16 11:52:18 2020 +0200

    I#1070 - Improve URL scanner (detect angle brackets)
    
    Closes https://gitlab.gnome.org/GNOME/evolution/-/issues/1070

 .../web-extension/e-editor-web-extension.c             | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)
---
diff --git a/src/modules/webkit-editor/web-extension/e-editor-web-extension.c 
b/src/modules/webkit-editor/web-extension/e-editor-web-extension.c
index 07667f87d7..a4d41060f3 100644
--- a/src/modules/webkit-editor/web-extension/e-editor-web-extension.c
+++ b/src/modules/webkit-editor/web-extension/e-editor-web-extension.c
@@ -183,13 +183,13 @@ static JSCValue *
 evo_editor_jsc_split_text_with_links (const gchar *text,
                                      JSCContext *jsc_context)
 {
-       // stephenhay from https://mathiasbynens.be/demo/url-regex
+       /* stephenhay from https://mathiasbynens.be/demo/url-regex */
        const gchar *URL_PATTERN = "((?:(?:(?:"
                                   "news|telnet|nntp|file|https?|s?ftp|webcal|localhost|ssh"
                                   ")\\:\\/\\/)|(?:www\\.|ftp\\.))[^\\s\\/\\$\\.\\?#].[^\\s]*+)";
-       // from camel-url-scanner.c
+       /* from camel-url-scanner.c */
        const gchar *URL_INVALID_TRAILING_CHARS = ",.:;?!-|}])\">";
-       // http://www.w3.org/TR/html5/forms.html#valid-e-mail-address
+       /* http://www.w3.org/TR/html5/forms.html#valid-e-mail-address */
        const gchar *EMAIL_PATTERN = "[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}"
                                     "[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*+";
        JSCValue *array = NULL;
@@ -217,10 +217,19 @@ evo_editor_jsc_split_text_with_links (const gchar *text,
                evo_editor_find_pattern (text, is_email ? EMAIL_PATTERN : URL_PATTERN, &start, &end);
 
                if (start >= 0 && end >= 0) {
-                       const gchar *url_end;
+                       const gchar *url_end, *ptr;
 
                        url_end = text + end - 1;
 
+                       /* Stop on the angle brackets, which cannot be part of the URL (see RFC 3986 Appendix 
C) */
+                       for (ptr = text + start; ptr <= url_end; ptr++) {
+                               if (*ptr == '<' || *ptr == '>') {
+                                       end = ptr - text;
+                                       url_end = text + end - 1;
+                                       break;
+                               }
+                       }
+
                        /* URLs are extremely unlikely to end with any punctuation, so
                         * strip any trailing punctuation off from link and put it after
                         * the link. Do the same for any closing double-quotes as well. */
@@ -238,7 +247,6 @@ evo_editor_jsc_split_text_with_links (const gchar *text,
 
                                if (open_bracket != 0) {
                                        gint n_opened = 0, n_closed = 0;
-                                       const gchar *ptr;
 
                                        for (ptr = text + start; ptr <= url_end; ptr++) {
                                                if (*ptr == open_bracket)