cgtop: underline table header

Let's underline the header line of the table shown by cgtop, how it is
customary for tables. In order to do this, let's introduce new ANSI
underline macros, and clean up the existing ones as side effect.

3 files changed, 35 insertions, 21 deletions

diff --git a/src/basic/log.c b/src/basic/log.c
index b96afc4de4..38f42b3a6e 100644
--- a/src/basic/log.c
+++ b/src/basic/log.c
@@ -340,10 +340,10 @@ static int write_to_console(
         }
 
         if (highlight)
-                IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_RED_ON);
+                IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_RED);
         IOVEC_SET_STRING(iovec[n++], buffer);
         if (highlight)
-                IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_OFF);
+                IOVEC_SET_STRING(iovec[n++], ANSI_NORMAL);
         IOVEC_SET_STRING(iovec[n++], "\n");
 
         if (writev(console_fd, iovec, n) < 0) {
diff --git a/src/basic/terminal-util.c b/src/basic/terminal-util.c
index c5ef5ab0d1..dd3d525854 100644
--- a/src/basic/terminal-util.c
+++ b/src/basic/terminal-util.c
@@ -139,14 +139,14 @@ int ask_char(char *ret, const char *replies, const char *text, ...) {
                 bool need_nl = true;
 
                 if (on_tty())
-                        fputs(ANSI_HIGHLIGHT_ON, stdout);
+                        fputs(ANSI_HIGHLIGHT, stdout);
 
                 va_start(ap, text);
                 vprintf(text, ap);
                 va_end(ap);
 
                 if (on_tty())
-                        fputs(ANSI_HIGHLIGHT_OFF, stdout);
+                        fputs(ANSI_NORMAL, stdout);
 
                 fflush(stdout);
 
@@ -183,14 +183,14 @@ int ask_string(char **ret, const char *text, ...) {
                 va_list ap;
 
                 if (on_tty())
-                        fputs(ANSI_HIGHLIGHT_ON, stdout);
+                        fputs(ANSI_HIGHLIGHT, stdout);
 
                 va_start(ap, text);
                 vprintf(text, ap);
                 va_end(ap);
 
                 if (on_tty())
-                        fputs(ANSI_HIGHLIGHT_OFF, stdout);
+                        fputs(ANSI_NORMAL, stdout);
 
                 fflush(stdout);
 
diff --git a/src/basic/terminal-util.h b/src/basic/terminal-util.h
index b9a3809a6c..a9e325ccb3 100644
--- a/src/basic/terminal-util.h
+++ b/src/basic/terminal-util.h
@@ -26,16 +26,22 @@
 #include "macro.h"
 #include "time-util.h"
 
-#define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
-#define ANSI_RED_ON "\x1B[31m"
-#define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
-#define ANSI_GREEN_ON "\x1B[32m"
-#define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
-#define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
-#define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
-#define ANSI_HIGHLIGHT_OFF "\x1B[0m"
+#define ANSI_RED "\x1B[0;31m"
+#define ANSI_GREEN "\x1B[0;32m"
+#define ANSI_UNDERLINE "\x1B[0;4m"
+#define ANSI_HIGHLIGHT "\x1B[0;1;39m"
+#define ANSI_HIGHLIGHT_RED "\x1B[0;1;31m"
+#define ANSI_HIGHLIGHT_GREEN "\x1B[0;1;32m"
+#define ANSI_HIGHLIGHT_YELLOW "\x1B[0;1;33m"
+#define ANSI_HIGHLIGHT_BLUE "\x1B[0;1;34m"
+#define ANSI_HIGHLIGHT_UNDERLINE "\x1B[0;1;4m"
+#define ANSI_NORMAL "\x1B[0m"
+
 #define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
 
+/* Set cursor to top left corner and clear screen */
+#define ANSI_HOME_CLEAR "\x1B[H\x1B[2J"
+
 int reset_terminal_fd(int fd, bool switch_to_text);
 int reset_terminal(const char *name);
 
@@ -78,28 +84,36 @@ void columns_lines_cache_reset(int _unused_ signum);
 
 bool on_tty(void);
 
+static inline const char *ansi_underline(void) {
+        return on_tty() ? ANSI_UNDERLINE : "";
+}
+
 static inline const char *ansi_highlight(void) {
-        return on_tty() ? ANSI_HIGHLIGHT_ON : "";
+        return on_tty() ? ANSI_HIGHLIGHT : "";
+}
+
+static inline const char *ansi_highlight_underline(void) {
+        return on_tty() ? ANSI_HIGHLIGHT_UNDERLINE : "";
 }
 
 static inline const char *ansi_highlight_red(void) {
-        return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
+        return on_tty() ? ANSI_HIGHLIGHT_RED : "";
 }
 
 static inline const char *ansi_highlight_green(void) {
-        return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
+        return on_tty() ? ANSI_HIGHLIGHT_GREEN : "";
 }
 
 static inline const char *ansi_highlight_yellow(void) {
-        return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
+        return on_tty() ? ANSI_HIGHLIGHT_YELLOW : "";
 }
 
 static inline const char *ansi_highlight_blue(void) {
-        return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
+        return on_tty() ? ANSI_HIGHLIGHT_BLUE : "";
 }
 
-static inline const char *ansi_highlight_off(void) {
-        return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
+static inline const char *ansi_normal(void) {
+        return on_tty() ? ANSI_NORMAL : "";
 }
 
 int get_ctty_devnr(pid_t pid, dev_t *d);