perf hists browser: Move coloring logic to hpp functions

Move coloring logic into the hpp functions so that each value can
be colored independently.  It'd required for event group view.

For overhead column, add a callback for printing 'folded_sign' of
callchains of a hist entry.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1358845787-1350-11-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 46242de..852e4e1 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -567,23 +567,48 @@
 	return row - first_row;
 }
 
-static int __hpp__color_fmt(struct perf_hpp *hpp, struct hist_entry *he,
-			    u64 (*get_field)(struct hist_entry *))
+struct hpp_arg {
+	struct ui_browser *b;
+	char folded_sign;
+	bool current_entry;
+};
+
+static int __hpp__color_callchain(struct hpp_arg *arg)
 {
-	int ret;
+	if (!symbol_conf.use_callchain)
+		return 0;
+
+	slsmg_printf("%c ", arg->folded_sign);
+	return 2;
+}
+
+static int __hpp__color_fmt(struct perf_hpp *hpp, struct hist_entry *he,
+			    u64 (*get_field)(struct hist_entry *),
+			    int (*callchain_cb)(struct hpp_arg *))
+{
+	int ret = 0;
 	double percent = 0.0;
 	struct hists *hists = he->hists;
+	struct hpp_arg *arg = hpp->ptr;
 
 	if (hists->stats.total_period)
 		percent = 100.0 * get_field(he) / hists->stats.total_period;
 
-	*(double *)hpp->ptr = percent;
+	ui_browser__set_percent_color(arg->b, percent, arg->current_entry);
 
-	ret = scnprintf(hpp->buf, hpp->size, "%6.2f%%", percent);
+	if (callchain_cb)
+		ret += callchain_cb(arg);
+
+	ret += scnprintf(hpp->buf, hpp->size, "%6.2f%%", percent);
+	slsmg_printf("%s", hpp->buf);
+
+	if (!arg->current_entry || !arg->b->navkeypressed)
+		ui_browser__set_color(arg->b, HE_COLORSET_NORMAL);
+
 	return ret;
 }
 
-#define __HPP_COLOR_PERCENT_FN(_type, _field)				\
+#define __HPP_COLOR_PERCENT_FN(_type, _field, _cb)			\
 static u64 __hpp_get_##_field(struct hist_entry *he)			\
 {									\
 	return he->stat._field;						\
@@ -592,14 +617,14 @@
 static int hist_browser__hpp_color_##_type(struct perf_hpp *hpp,	\
 					   struct hist_entry *he)	\
 {									\
-	return __hpp__color_fmt(hpp, he, __hpp_get_##_field);		\
+	return __hpp__color_fmt(hpp, he, __hpp_get_##_field, _cb);	\
 }
 
-__HPP_COLOR_PERCENT_FN(overhead, period)
-__HPP_COLOR_PERCENT_FN(overhead_sys, period_sys)
-__HPP_COLOR_PERCENT_FN(overhead_us, period_us)
-__HPP_COLOR_PERCENT_FN(overhead_guest_sys, period_guest_sys)
-__HPP_COLOR_PERCENT_FN(overhead_guest_us, period_guest_us)
+__HPP_COLOR_PERCENT_FN(overhead, period, __hpp__color_callchain)
+__HPP_COLOR_PERCENT_FN(overhead_sys, period_sys, NULL)
+__HPP_COLOR_PERCENT_FN(overhead_us, period_us, NULL)
+__HPP_COLOR_PERCENT_FN(overhead_guest_sys, period_guest_sys, NULL)
+__HPP_COLOR_PERCENT_FN(overhead_guest_us, period_guest_us, NULL)
 
 #undef __HPP_COLOR_PERCENT_FN
 
@@ -626,7 +651,6 @@
 				    unsigned short row)
 {
 	char s[256];
-	double percent;
 	int printed = 0;
 	int width = browser->b.width;
 	char folded_sign = ' ';
@@ -646,16 +670,20 @@
 	}
 
 	if (row_offset == 0) {
+		struct hpp_arg arg = {
+			.b 		= &browser->b,
+			.folded_sign	= folded_sign,
+			.current_entry	= current_entry,
+		};
 		struct perf_hpp hpp = {
 			.buf		= s,
 			.size		= sizeof(s),
+			.ptr		= &arg,
 		};
-		int i = 0;
 
 		ui_browser__gotorc(&browser->b, row, 0);
 
 		perf_hpp__for_each_format(fmt) {
-
 			if (!first) {
 				slsmg_printf("  ");
 				width -= 2;
@@ -663,27 +691,11 @@
 			first = false;
 
 			if (fmt->color) {
-				hpp.ptr = &percent;
-				/* It will set percent for us. See __hpp__color_fmt above. */
 				width -= fmt->color(&hpp, entry);
-
-				ui_browser__set_percent_color(&browser->b, percent, current_entry);
-
-				if (!i && symbol_conf.use_callchain) {
-					slsmg_printf("%c ", folded_sign);
-					width -= 2;
-				}
-
-				slsmg_printf("%s", s);
-
-				if (!current_entry || !browser->b.navkeypressed)
-					ui_browser__set_color(&browser->b, HE_COLORSET_NORMAL);
 			} else {
 				width -= fmt->entry(&hpp, entry);
 				slsmg_printf("%s", s);
 			}
-
-			i++;
 		}
 
 		/* The scroll bar isn't being used */