when sending messages, check for line length limit and display warning if exceeds.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@386 ee746299-78ed-0310-b773-934348b2243d

3 files changed, 53 insertions, 2 deletions

diff --git a/src/compose.c b/src/compose.c
index 2f1dee05..5967cc0b 100644
--- a/src/compose.c
+++ b/src/compose.c
@@ -2625,6 +2625,7 @@ static gint compose_write_to_file(Compose *compose, const gchar *file,
 	const gchar *body_charset;
 	const gchar *src_charset = CS_INTERNAL;
 	EncodingType encoding;
+	gint line;
 
 	if ((fp = fopen(file, "wb")) == NULL) {
 		FILE_OP_ERROR(file, "fopen");
@@ -2731,10 +2732,31 @@ static gint compose_write_to_file(Compose *compose, const gchar *file,
 		    src_charset, out_charset, body_charset,
 		    procmime_get_encoding_str(encoding));
 
+	/* check for line length limit */
+	if (encoding != ENC_QUOTED_PRINTABLE && encoding != ENC_BASE64 &&
+	    check_line_length(buf, 1000, &line) < 0) {
+		AlertValue aval;
+		gchar *msg;
+
+		msg = g_strdup_printf
+			(_("Line %d exceeds the line length limit (998 bytes).\n"
+			   "The contents of the message might be broken on the way to the delivery.\n"
+			   "\n"
+			   "Send it anyway?"), line + 1);
+		aval = alertpanel(_("Warning"), msg, _("Yes"), _("+No"), NULL);
+		if (aval != G_ALERTDEFAULT) {
+			g_free(msg);
+			fclose(fp);
+			unlink(file);
+			g_free(buf);
+			return -1;
+		}
+	}
+
 	/* write headers */
 	if (compose_write_headers(compose, fp, out_charset,
 				  body_charset, encoding, is_draft) < 0) {
-		g_warning(_("can't write headers\n"));
+		g_warning("can't write headers\n");
 		fclose(fp);
 		unlink(file);
 		g_free(buf);
diff --git a/src/utils.c b/src/utils.c
index f5ba1125..932c8320 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -1133,6 +1133,32 @@ gint get_quote_level(const gchar *str)
 	return quote_level;
 }
 
+gint check_line_length(const gchar *str, gint max_chars, gint *line)
+{
+	const gchar *p = str, *q;
+	gint cur_line = 0, len;
+
+	while ((q = strchr(p, '\n')) != NULL) {
+		len = q - p + 1;
+		if (len > max_chars) {
+			if (line)
+				*line = cur_line;
+			return -1;
+		}
+		p = q + 1;
+		++cur_line;
+	}
+
+	len = strlen(p);
+	if (len > max_chars) {
+		if (line)
+			*line = cur_line;
+		return -1;
+	}
+
+	return 0;
+}
+
 gchar *strstr_with_skip_quote(const gchar *haystack, const gchar *needle)
 {
 	register guint haystack_len, needle_len;
diff --git a/src/utils.h b/src/utils.h
index 46767d90..e3cfa75f 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -1,6 +1,6 @@
 /*
  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
- * Copyright (C) 1999-2004 Hiroyuki Yamamoto
+ * Copyright (C) 1999-2005 Hiroyuki Yamamoto
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -299,6 +299,9 @@ void subst_for_filename			(gchar		*str);
 gboolean is_header_line			(const gchar	*str);
 gboolean is_ascii_str			(const guchar	*str);
 gint get_quote_level			(const gchar	*str);
+gint check_line_length			(const gchar	*str,
+					 gint		 max_chars,
+					 gint		*line);
 
 gchar *strstr_with_skip_quote		(const gchar	*haystack,
 					 const gchar	*needle);