From ddccf47fa2f4369abcce0a0b293ef9d0775dbbaf Mon Sep 17 00:00:00 2001
From: Thomas Koutcher <thomas.koutcher@online.fr>
Date: Mon, 21 Jun 2021 20:32:43 +0200
Subject: [PATCH] Make word-diff a toggleable option

Closes #1119
---
 include/tig/options.h | 3 ++-
 src/diff.c            | 4 ++--
 src/options.c         | 8 ++++++++
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/include/tig/options.h b/include/tig/options.h
index 79b212851..9fc1eecc2 100644
--- a/include/tig/options.h
+++ b/include/tig/options.h
@@ -39,6 +39,7 @@ typedef struct view_column *view_settings;
 	_(diff_noprefix,		bool,			VIEW_NO_FLAGS) \
 	_(diff_options,			const char **,		VIEW_DIFF_LIKE) \
 	_(diff_highlight,		const char *,		VIEW_DIFF_LIKE) \
+	_(word_diff,			bool,			VIEW_DIFF_LIKE) \
 	_(diff_view,			view_settings,		VIEW_NO_FLAGS) \
 	_(editor_line_number,		bool,			VIEW_NO_FLAGS) \
 	_(file_args,			const char **,		VIEW_NO_FLAGS) \
@@ -183,7 +184,6 @@ extern iconv_t opt_iconv_out;
 extern char opt_editor[SIZEOF_STR];
 extern const char **opt_cmdline_args;
 extern bool opt_log_follow;
-extern bool opt_word_diff;
 
 /*
  * Mapping between options and command argument mapping.
@@ -197,6 +197,7 @@ const char *commit_order_arg_with_graph(enum graph_display graph_display);
 const char *log_custom_pretty_arg();
 const char *use_mailmap_arg();
 const char *diff_context_arg();
+const char *word_diff_arg();
 const char *show_notes_arg();
 
 /*
diff --git a/src/diff.c b/src/diff.c
index 732fc3f4a..2710a34be 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -29,8 +29,8 @@ diff_open(struct view *view, enum open_flags flags)
 		"git", "show", encoding_arg, "--pretty=fuller", "--root",
 			"--patch-with-stat", use_mailmap_arg(),
 			show_notes_arg(), diff_context_arg(), ignore_space_arg(),
-			DIFF_ARGS, "%(cmdlineargs)", "--no-color", "%(commit)",
-			"--", "%(fileargs)", NULL
+			DIFF_ARGS, "%(cmdlineargs)", "--no-color", word_diff_arg(),
+			"%(commit)", "--", "%(fileargs)", NULL
 	};
 	enum status_code code;
 
diff --git a/src/options.c b/src/options.c
index 0dfa98202..f5ee2bc2c 100644
--- a/src/options.c
+++ b/src/options.c
@@ -141,6 +141,12 @@ diff_context_arg()
 	return opt_diff_context_arg;
 }
 
+const char *
+word_diff_arg()
+{
+	return opt_word_diff ? "--word-diff=plain" : "--word-diff=none";
+}
+
 const char *
 use_mailmap_arg()
 {
@@ -257,6 +263,8 @@ update_options_from_argv(const char *argv[])
 		if (!strcmp(flag, "--word-diff") ||
 		    !strcmp(flag, "--word-diff=plain")) {
 			opt_word_diff = true;
+			mark_option_seen(&opt_word_diff);
+			continue;
 		}
 
 		argv[flags_pos++] = flag;