diff.h: rename DIFF_PLAIN color slot to DIFF_CONTEXT

The latter is a much more descriptive name (and we support
"color.diff.context" now). This also updates the name of any
local variables which were used to store the color.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

combine-diff.c

@@ -730,7 +730,7 @@ static void dump_sline(struct sline *sline, const char *line_prefix,
 	const char *c_func = diff_get_color(use_color, DIFF_FUNCINFO);
 	const char *c_new = diff_get_color(use_color, DIFF_FILE_NEW);
 	const char *c_old = diff_get_color(use_color, DIFF_FILE_OLD);
-	const char *c_plain = diff_get_color(use_color, DIFF_PLAIN);
+	const char *c_context = diff_get_color(use_color, DIFF_CONTEXT);
 	const char *c_reset = diff_get_color(use_color, DIFF_RESET);
 
 	if (result_deleted)
@@ -793,7 +793,7 @@ static void dump_sline(struct sline *sline, const char *line_prefix,
 			}
 			if (comment_end)
 				printf("%s%s %s%s", c_reset,
-						    c_plain, c_reset,
+						    c_context, c_reset,
 						    c_func);
 			for (i = 0; i < comment_end; i++)
 				putchar(hunk_comment[i]);
@@ -828,7 +828,7 @@ static void dump_sline(struct sline *sline, const char *line_prefix,
 				 */
 				if (!context)
 					continue;
-				fputs(c_plain, stdout);
+				fputs(c_context, stdout);
 			}
 			else
 				fputs(c_new, stdout);

diff.c

@@ -42,7 +42,7 @@ static long diff_algorithm;
 
 static char diff_colors[][COLOR_MAXLEN] = {
 	GIT_COLOR_RESET,
-	GIT_COLOR_NORMAL,	/* PLAIN */
+	GIT_COLOR_NORMAL,	/* CONTEXT */
 	GIT_COLOR_BOLD,		/* METAINFO */
 	GIT_COLOR_CYAN,		/* FRAGINFO */
 	GIT_COLOR_RED,		/* OLD */
@@ -55,7 +55,7 @@ static char diff_colors[][COLOR_MAXLEN] = {
 static int parse_diff_color_slot(const char *var)
 {
 	if (!strcasecmp(var, "context") || !strcasecmp(var, "plain"))
-		return DIFF_PLAIN;
+		return DIFF_CONTEXT;
 	if (!strcasecmp(var, "meta"))
 		return DIFF_METAINFO;
 	if (!strcasecmp(var, "frag"))
@@ -501,7 +501,7 @@ static void emit_add_line(const char *reset,
 static void emit_hunk_header(struct emit_callback *ecbdata,
 			     const char *line, int len)
 {
-	const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN);
+	const char *context = diff_get_color(ecbdata->color_diff, DIFF_CONTEXT);
 	const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO);
 	const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO);
 	const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET);
@@ -518,7 +518,7 @@ static void emit_hunk_header(struct emit_callback *ecbdata,
 	if (len < 10 ||
 	    memcmp(line, atat, 2) ||
 	    !(ep = memmem(line + 2, len - 2, atat, 2))) {
-		emit_line(ecbdata->opt, plain, reset, line, len);
+		emit_line(ecbdata->opt, context, reset, line, len);
 		return;
 	}
 	ep += 2; /* skip over @@ */
@@ -540,7 +540,7 @@ static void emit_hunk_header(struct emit_callback *ecbdata,
 		if (*ep != ' ' && *ep != '\t')
 			break;
 	if (ep != cp) {
-		strbuf_addstr(&msgbuf, plain);
+		strbuf_addstr(&msgbuf, context);
 		strbuf_add(&msgbuf, cp, ep - cp);
 		strbuf_addstr(&msgbuf, reset);
 	}
@@ -623,10 +623,10 @@ static void emit_rewrite_lines(struct emit_callback *ecb,
 		data += len;
 	}
 	if (!endp) {
-		const char *plain = diff_get_color(ecb->color_diff,
-						   DIFF_PLAIN);
+		const char *context = diff_get_color(ecb->color_diff,
+						     DIFF_CONTEXT);
 		putc('\n', ecb->opt->file);
-		emit_line_0(ecb->opt, plain, reset, '\\',
+		emit_line_0(ecb->opt, context, reset, '\\',
 			    nneof, strlen(nneof));
 	}
 }
@@ -1086,7 +1086,7 @@ static void init_diff_words_data(struct emit_callback *ecbdata,
 		struct diff_words_style *st = ecbdata->diff_words->style;
 		st->old.color = diff_get_color_opt(o, DIFF_FILE_OLD);
 		st->new.color = diff_get_color_opt(o, DIFF_FILE_NEW);
-		st->ctx.color = diff_get_color_opt(o, DIFF_PLAIN);
+		st->ctx.color = diff_get_color_opt(o, DIFF_CONTEXT);
 	}
 }
 
@@ -1162,7 +1162,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
 {
 	struct emit_callback *ecbdata = priv;
 	const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO);
-	const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN);
+	const char *context = diff_get_color(ecbdata->color_diff, DIFF_CONTEXT);
 	const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET);
 	struct diff_options *o = ecbdata->opt;
 	const char *line_prefix = diff_line_prefix(o);
@@ -1233,7 +1233,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
 		}
 		diff_words_flush(ecbdata);
 		if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) {
-			emit_line(ecbdata->opt, plain, reset, line, len);
+			emit_line(ecbdata->opt, context, reset, line, len);
 			fputs("~\n", ecbdata->opt->file);
 		} else {
 			/*
@@ -1245,7 +1245,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
 			      line++;
 			      len--;
 			}
-			emit_line(ecbdata->opt, plain, reset, line, len);
+			emit_line(ecbdata->opt, context, reset, line, len);
 		}
 		return;
 	}
@@ -1253,7 +1253,7 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
 	if (line[0] != '+') {
 		const char *color =
 			diff_get_color(ecbdata->color_diff,
-				       line[0] == '-' ? DIFF_FILE_OLD : DIFF_PLAIN);
+				       line[0] == '-' ? DIFF_FILE_OLD : DIFF_CONTEXT);
 		ecbdata->lno_in_preimage++;
 		if (line[0] == ' ')
 			ecbdata->lno_in_postimage++;

diff.h

@@ -175,7 +175,7 @@ struct diff_options {
 
 enum color_diff {
 	DIFF_RESET = 0,
-	DIFF_PLAIN = 1,
+	DIFF_CONTEXT = 1,
 	DIFF_METAINFO = 2,
 	DIFF_FRAGINFO = 3,
 	DIFF_FILE_OLD = 4,

line-log.c

@@ -893,7 +893,7 @@ static void dump_diff_hacky_one(struct rev_info *rev, struct line_log_data *rang
 	const char *c_meta = diff_get_color(opt->use_color, DIFF_METAINFO);
 	const char *c_old = diff_get_color(opt->use_color, DIFF_FILE_OLD);
 	const char *c_new = diff_get_color(opt->use_color, DIFF_FILE_NEW);
-	const char *c_plain = diff_get_color(opt->use_color, DIFF_PLAIN);
+	const char *c_context = diff_get_color(opt->use_color, DIFF_CONTEXT);
 
 	if (!pair || !diff)
 		return;
@@ -957,7 +957,7 @@ static void dump_diff_hacky_one(struct rev_info *rev, struct line_log_data *rang
 			int k;
 			for (; t_cur < diff->target.ranges[j].start; t_cur++)
 				print_line(prefix, ' ', t_cur, t_ends, pair->two->data,
-					   c_plain, c_reset);
+					   c_context, c_reset);
 			for (k = diff->parent.ranges[j].start; k < diff->parent.ranges[j].end; k++)
 				print_line(prefix, '-', k, p_ends, pair->one->data,
 					   c_old, c_reset);
@@ -968,7 +968,7 @@ static void dump_diff_hacky_one(struct rev_info *rev, struct line_log_data *rang
 		}
 		for (; t_cur < t_end; t_cur++)
 			print_line(prefix, ' ', t_cur, t_ends, pair->two->data,
-				   c_plain, c_reset);
+				   c_context, c_reset);
 	}
 
 	free(p_ends);