From 271984b760862fef6041364eb04c0eed0dad272e Mon Sep 17 00:00:00 2001
From: Witold Filipczyk <witekfl@poczta.onet.pl>
Date: Mon, 28 Oct 2024 19:14:14 +0100
Subject: [PATCH] [download] Added boolean option
 document.download.compressed_as_plain

Enabled by default. It allow to view compressed files automatically.
For example files in /usr/share/doc.
---
 src/config/options.inc |  6 ++++--
 src/session/download.c | 29 ++++++++++++++++++++++++++---
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/src/config/options.inc b/src/config/options.inc
index 0332bf803..3399bb955 100644
--- a/src/config/options.inc
+++ b/src/config/options.inc
@@ -709,8 +709,6 @@ static union option_info config_options_info[] = {
 
 	/* Keep options in alphabetical order. */
 
-
-
 	INIT_OPT_TREE("document", N_("Downloading"),
 		"download", OPT_ZERO,
 		N_("Options regarding files downloading and handling.")),
@@ -724,6 +722,10 @@ static union option_info config_options_info[] = {
 		N_("Set the timestamp of each downloaded file to the "
 		"timestamp stored on the server.")),
 
+	INIT_OPT_BOOL("document.download", N_("Show compressed files as plain text"),
+		"compressed_as_plain", OPT_ZERO, 1,
+		N_("Whether to view compressed files (.gz, .zst or .xz) as plain text.")),
+
 	/* Does automatic resuming make sense as an option? */
 	INIT_OPT_INT("document.download", N_("Prevent overwriting"),
 		"overwrite", OPT_ZERO, 0, 2, 2,
diff --git a/src/session/download.c b/src/session/download.c
index fdf659d20..644c9269e 100644
--- a/src/session/download.c
+++ b/src/session/download.c
@@ -1913,6 +1913,19 @@ struct {
 	{ NULL,				1 },
 };
 
+static const char *compressed_types[] = {
+#ifdef CONFIG_GZIP
+	"application/gzip",
+#endif
+#ifdef CONFIG_ZSTD
+	"application/zstd",
+#endif
+#ifdef CONFIG_LZMA
+	"application/x-xz",
+#endif
+	NULL
+};
+
 /*! @relates type_query */
 int
 setup_download_handler(struct session *ses, struct download *loading,
@@ -1936,12 +1949,22 @@ setup_download_handler(struct session *ses, struct download *loading,
 		plaintext = known_types[i].plain;
 		goto plaintext_follow;
 	}
-
 	xwin = ses->tab->term->environment & ENV_XWIN;
 	handler = get_mime_type_handler(ctype, xwin);
 
-	if (!handler && strlen(ctype) >= 4 && !c_strncasecmp(ctype, "text", 4))
-		goto plaintext_follow;
+	if (!handler) {
+		if (strlen(ctype) >= 4 && !c_strncasecmp(ctype, "text", 4)) {
+			goto plaintext_follow;
+		}
+		for (i = 0; compressed_types[i]; i++) {
+			if (c_strcasecmp(ctype, compressed_types[i])) {
+				continue;
+			}
+			if (get_opt_bool("document.download.compressed_as_plain", ses)) {
+				goto plaintext_follow;
+			}
+		}
+	}
 
 	type_query = find_type_query(ses);
 	if (type_query) {