pidgin-sipe hack to fix pasted line breaks in received messages from Lync

0001-sipmsg-insert-line-breaks-between-paragraphs.patch

From 087937f81634bd315444c38b7e0906280e8d2895 Mon Sep 17 00:00:00 2001
From: Allen Wild <allenwild93@gmail.com>
Date: Tue, 23 Oct 2018 17:01:57 -0400
Subject: [PATCH] sipmsg: insert line breaks between paragraphs

Pasting text into Lync causes the lines to be split with <p></p> tags,
but pidgin doesn't display this and puts everything on one ugly line.

This is really a pidgin bug but I can hack around it in sipe by sneaking
in <br/> after every </p> we see (unless it's at the end of the message
or there's already a <br> tag)
---
 src/core/sipmsg.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/src/core/sipmsg.c b/src/core/sipmsg.c
index 4bbfb3e..d6a1eed 100644
--- a/src/core/sipmsg.c
+++ b/src/core/sipmsg.c
@@ -584,6 +584,48 @@ static void get_html_message_mime_cb(gpointer user_data,
 	}
 }
 
+/* WILD ADD
+ * insert substring ins into the position pos of original string str.
+ * str will be free'd, returns a pointer to the new string
+ */
+static gchar *wild_insert_into_str(gchar *str, const char *ins, size_t pos)
+{
+	size_t orig_len = strlen(str);
+	size_t ins_len = strlen(ins);
+	gchar *new = g_malloc(orig_len + ins_len + 1);
+	if (!new)
+		return str;
+
+	if (pos > orig_len)
+		pos = orig_len;
+
+	memcpy(new, str, pos);
+	memcpy(new+pos, ins, ins_len);
+	memcpy(new+pos+ins_len, str+pos, orig_len-pos+1);
+
+	g_free(str);
+	return new;
+}
+
+static gchar *wild_p_br_hack(gchar *str)
+{
+	size_t pos = 0;
+	while (pos < strlen(str)-4)
+	{
+		/* find </p> not followed by <br */
+		if (!g_ascii_strncasecmp(str+pos, "</p>", 4) &&
+		    g_ascii_strncasecmp(str+pos+4, "<br", 3))
+		{
+			str = wild_insert_into_str(str, "<br/>", pos+4);
+			pos += 9;
+		}
+		else pos++;
+	}
+
+	return str;
+}
+/* WILD ADD END */
+
 /* ms-text-format: text/plain; charset=UTF-8;msgr=WAAtAE0...DIADQAKAA0ACgA;ms-body=SGk= */
 gchar *get_html_message(const gchar *ms_text_format_in, const gchar *body_in)
 {
@@ -640,6 +682,7 @@ gchar *get_html_message(const gchar *ms_text_format_in, const gchar *body_in)
 				*d++ = c;
 		*d = c;
 
+		res = wild_p_br_hack(res); /* WILD ADD */
 	} else {
 		char *tmp = res;
 		res = g_markup_escape_text(res, -1); // as this is not html
-- 
2.19.1