From e32d2be849706863f5595c11dff7a69f3678aec0 Mon Sep 17 00:00:00 2001
From: Michael Tremer <michael.tremer@ipfire.org>
Date: Sat, 28 Sep 2024 11:52:03 +0000
Subject: [PATCH] tui: Add a log window to show log messages

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---
 src/tui.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 68 insertions(+), 3 deletions(-)

diff --git a/src/tui.c b/src/tui.c
index ef23556..2dc4ffd 100644
--- a/src/tui.c
+++ b/src/tui.c
@@ -27,6 +27,7 @@
 #include <ncurses.h>
 
 #include "ctx.h"
+#include "logging.h"
 #include "stats.h"
 #include "tui.h"
 #include "util.h"
@@ -49,10 +50,50 @@ struct fireperf_tui {
 	// The graph inside the frame
 	WINDOW* graph;
 
+	// The log window
+	WINDOW* log;
+
 	// The status bar
 	WINDOW* status;
 };
 
+void fireperf_tui_log(void* data, int priority, const char* file,
+		int line, const char* fn, const char* format, va_list args) {
+	struct fireperf_tui* tui = data;
+	char buffer[1024];
+	ssize_t length;
+	int rows;
+	int cols;
+
+	// Fetch the dimensions of the log window
+	getmaxyx(tui->log, rows, cols);
+
+	// We leave one character free on the left and the right
+	cols -= 2;
+
+	// Format the message
+	length = vsnprintf(buffer, sizeof(buffer), format, args);
+	if (length < 0)
+		return;
+
+	// Scroll down the previous content to add an extra line
+	scroll(tui->log);
+
+	// Remove the trailing newline
+	length--;
+
+	// If the message is long
+	if (length > cols)
+		length = cols;
+
+	// Write the message
+	mvwaddnstr(tui->log, rows - 1, 1, buffer, length);
+
+	wrefresh(tui->log);
+
+	return;
+}
+
 static const struct fireperf_stats* fireperf_tui_get_stats(struct fireperf_tui* tui, int i) {
 	return &tui->stats[(tui->s - i) % MAX_STATS];
 }
@@ -78,7 +119,7 @@ static int fireperf_tui_setup_graph(struct fireperf_tui* tui) {
 	int r;
 
 	// Create the graph
-	tui->graph = newwin(LINES - 3, COLS - 3, 1, 1);
+	tui->graph = newwin(LINES - 13, COLS - 3, 1, 1);
 	if (!tui->graph)
 		return 1;
 
@@ -92,7 +133,7 @@ static int fireperf_tui_setup_frame(struct fireperf_tui* tui) {
 	int r;
 
 	// Create the window
-	tui->frame = newwin(LINES - 1, COLS, 0, 0);
+	tui->frame = newwin(LINES - 11, COLS, 0, 0);
 	if (!tui->frame)
 		return 1;
 
@@ -111,7 +152,6 @@ static int fireperf_tui_setup_frame(struct fireperf_tui* tui) {
 	return 0;
 }
 
-
 static int fireperf_tui_update_status(struct fireperf_tui* tui) {
 	const struct fireperf_stats* stats = NULL;
 	char buffer[32];
@@ -191,6 +231,23 @@ ERROR:
 	return 0;
 }
 
+static int fireperf_tui_setup_log(struct fireperf_tui* tui) {
+	int r;
+
+	// Create the window
+	tui->log = newwin(10, COLS, LINES - 11, 0);
+	if (!tui->log)
+		return 1;
+
+	// Enable scrolling in the window
+	scrollok(tui->log, 1);
+
+	// Refresh
+	wrefresh(tui->log);
+
+	return 0;
+}
+
 static int fireperf_tui_setup_status(struct fireperf_tui* tui) {
 	int r;
 
@@ -259,6 +316,11 @@ static int fireperf_tui_setup(struct fireperf_tui* tui) {
 	if (r)
 		return r;
 
+	// Setup the log window
+	r = fireperf_tui_setup_log(tui);
+	if (r)
+		return r;
+
 	// Setup the status bar
 	r = fireperf_tui_setup_status(tui);
 	if (r)
@@ -287,6 +349,9 @@ int fireperf_tui_init(struct fireperf_tui** tui, struct fireperf_ctx* ctx) {
 	if (r)
 		return r;
 
+	// Hijack log messages
+	fireperf_set_log_callback(ctx, fireperf_tui_log, t);
+
 	// Return the TUI
 	*tui = t;
 
-- 
2.47.2