From e74854a37c809fb4b0327289feebfbd5fa937588 Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Tue, 8 Sep 2015 20:44:54 +0200
Subject: some very first (flickering) running progress bars

---
 src/CMakeLists.txt   |  2 +-
 src/progressbar.c    | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 src/progressbar.h    | 10 +++++++++
 tests/CMakeLists.txt |  2 +-
 4 files changed, 69 insertions(+), 3 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 65e457e..793c742 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -10,4 +10,4 @@ ADD_GENGETOPT_FILES(SRC options.ggo)
 
 add_executable(cssh ${SRC})
 
-target_link_libraries(cssh ssh ssh_threads)
+target_link_libraries(cssh ssh curses)
diff --git a/src/progressbar.c b/src/progressbar.c
index e8cd54b..c83450b 100644
--- a/src/progressbar.c
+++ b/src/progressbar.c
@@ -4,6 +4,7 @@
 #include <stdio.h>
 #include <stdarg.h>
 #include <string.h>
+#include <termcap.h>
 
 int create_progressbar( cssh_progressbar_t *progressbar, uint64_t min_value, uint64_t max_value, size_t size, const char *label_fmt, ... )
 {
@@ -21,6 +22,8 @@ int create_progressbar( cssh_progressbar_t *progressbar, uint64_t min_value, uin
 	(void)vsnprintf( progressbar->label, size, label_fmt, va );
 	
 	progressbar->value = progressbar->min_value;
+	progressbar->total_steps = 0;
+	progressbar->current_step = 0;
 	
 	va_end( va );
 	
@@ -37,9 +40,40 @@ void set_value_of_progressbar( cssh_progressbar_t *progressbar, uint64_t value )
 	progressbar->value = value;
 }
 
+static void compute_progressbar_steps( cssh_progressbar_t *progressbar )
+{
+	cssh_progressbar_pool_t *pool = progressbar->pool;
+	
+	progressbar->total_steps = pool->cols - strlen( progressbar->label ) - 2;
+}
+
 void redraw_progressbar( cssh_progressbar_t *progressbar )
 {
-	fprintf( stderr, "%s %"PRIu64"  \n", progressbar->label, progressbar->value );
+	if( progressbar->total_steps == 0 ) {
+		compute_progressbar_steps( progressbar );
+	}
+
+	unsigned int new_step = progressbar->value * ( (double)progressbar->total_steps / ( progressbar->max_value - progressbar->min_value ) );
+	if( new_step == progressbar->current_step ) {
+		printf( "\n" );
+		return;
+	}
+	
+	char *buf = (char *)malloc( progressbar->total_steps );
+	//~ if( buf == NULL ) {
+		//~ printf( "\33[1E\n" );
+		//~ return;
+	//~ }
+	
+	buf[progressbar->total_steps] = '\0';
+	memset( buf, (int)' ', progressbar->total_steps );
+	memset( buf, (int)'#', progressbar->current_step );
+
+	fprintf( stderr, "%s [%s]\n", progressbar->label, buf );
+
+	free( buf );
+
+	progressbar->current_step = new_step;
 }
 
 int create_progressbar_pool( cssh_progressbar_pool_t *pool, size_t initial_size )
@@ -50,6 +84,25 @@ int create_progressbar_pool( cssh_progressbar_pool_t *pool, size_t initial_size
 	if( pool->progressbar == NULL ) {
 		return -1;
 	}
+
+	pool->termbuf = (char *)malloc( TERMBUF_SIZE );
+	if( pool->termbuf == NULL ) {
+		free( pool->progressbar );
+		return -1;
+	}
+	
+	char *termtype = getenv( "TERM" );
+	if( termtype == NULL ) {
+		pool->cols = DEFAULT_COLS;
+	}
+	
+	int rc = tgetent( pool->termbuf, termtype );
+	
+	if( rc < 0 ) {
+		pool->cols = DEFAULT_COLS;
+	} else {
+		pool->cols = tgetnum( "co" ) - 2;
+	}
 	
 	return 0;
 }
@@ -61,6 +114,7 @@ void free_progressbar_pool( cssh_progressbar_pool_t *pool )
 	}
 	
 	free( pool->progressbar );
+	free( pool->termbuf );
 }
 
 int append_progressbar_to_pool( cssh_progressbar_pool_t *pool, cssh_progressbar_t *progressbar )
@@ -72,6 +126,8 @@ int append_progressbar_to_pool( cssh_progressbar_pool_t *pool, cssh_progressbar_
 	pool->progressbar[pool->N] = progressbar;
 	pool->N++;
 	
+	progressbar->pool = pool;
+	
 	return 0;
 }
 
diff --git a/src/progressbar.h b/src/progressbar.h
index 3bcc65b..eb47516 100644
--- a/src/progressbar.h
+++ b/src/progressbar.h
@@ -8,17 +8,27 @@
 #include <inttypes.h>
 #include <sys/types.h>
 
+#define DEFAULT_COLS 80
+#define TERMBUF_SIZE 2048
+
+struct cssh_progressbar_pool_t;
+
 typedef struct cssh_progressbar_t {
 	uint64_t min_value;
 	uint64_t max_value;
 	char *label;
 	uint64_t value;
+	unsigned int total_steps;
+	unsigned int current_step;
+	struct cssh_progressbar_pool_t *pool;
 } cssh_progressbar_t;
 
 typedef struct cssh_progressbar_pool_t {
 	size_t capacity;
 	size_t N;
 	cssh_progressbar_t **progressbar;
+	char *termbuf;
+	unsigned char cols;
 } cssh_progressbar_pool_t;
 
 int create_progressbar( cssh_progressbar_t *progressbar, uint64_t min_value, uint64_t max_value, size_t size, const char *label_fmt, ... );
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index fb9e6c2..4572b47 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -2,6 +2,6 @@ include_directories(../src)
 
 add_executable(progressbartest progressbartest.c ../src/progressbar.c ../src/port.c)
 
-target_link_libraries(progressbartest)
+target_link_libraries(progressbartest curses)
 
 add_test(ProgressBarPool progressbartest)
-- 
cgit v1.2.3-54-g00ecf