Imported ncmpc (mpc-ncures).

git-svn-id: https://svn.musicpd.org/ncmpc/trunk@292 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 152 insertions, 0 deletions

diff --git a/screen_utils.c b/screen_utils.c
new file mode 100644
index 000000000..e100cbf52
--- /dev/null
+++ b/screen_utils.c
@@ -0,0 +1,152 @@
+/* 
+ * $Id: screen_utils.c,v 1.4 2004/03/16 13:57:24 kalle Exp $ 
+ *
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <glib.h>
+#include <ncurses.h>
+
+#include "libmpdclient.h"
+#include "mpc.h"
+#include "command.h"
+#include "screen.h"
+
+
+
+list_window_t *
+list_window_init(WINDOW *w, int width, int height)
+{
+  list_window_t *lw;
+
+  lw = malloc(sizeof(list_window_t));
+  memset(lw, 0, sizeof(list_window_t));
+  lw->w = w;
+  lw->cols = width;
+  lw->rows = height;
+  lw->clear = 1;
+  return lw;
+}
+
+list_window_t *
+list_window_free(list_window_t *lw)
+{
+  if( lw )
+    {
+      memset(lw, 0, sizeof(list_window_t));
+      free(lw);
+    }
+  return NULL;
+}
+
+void
+list_window_reset(list_window_t *lw)
+{
+  lw->selected = 0;
+  lw->start = 0;
+  lw->clear = 1;
+}
+
+void 
+list_window_set_selected(list_window_t *lw, int n)
+{
+  lw->selected=n;
+}
+
+void 
+list_window_paint(list_window_t *lw,
+		  list_window_callback_fn_t callback,
+		  void *callback_data)
+{
+  int i;
+
+  while( lw->selected < lw->start )
+    {
+      lw->start--;
+      lw->clear=1;
+    }
+  while( lw->selected >= lw->start+lw->rows )
+    {
+      lw->start++;
+      lw->clear=1;
+    }
+  if( lw->clear )
+    {
+      wclear(lw->w);
+      lw->clear=0;
+    }
+
+  for(i=0; i<lw->rows; i++)
+    {
+      int highlight;
+      char *label;
+
+      label = (callback) (lw->start+i, &highlight, callback_data);
+      if( label )
+	{
+	  wmove(lw->w, i, 0);
+	  if( highlight )
+	    wattron(lw->w, A_BOLD);
+	  if( lw->start+i == lw->selected )
+	    wattron(lw->w, A_REVERSE);
+	  
+	  waddnstr(lw->w, label, lw->cols);
+
+	  if( highlight )
+	    wattroff(lw->w, A_BOLD);
+	  if( lw->start+i == lw->selected )
+	    wattroff(lw->w, A_REVERSE);
+	}
+    }
+}
+
+void
+list_window_next(list_window_t *lw, int length)
+{
+  if( lw->selected < length-1 )
+    lw->selected++;
+}
+
+void
+list_window_previous(list_window_t *lw)
+{
+  if( lw->selected > 0 )
+    lw->selected--;
+}
+
+void
+list_window_first(list_window_t *lw)
+{
+  lw->selected = 0;
+}
+
+void
+list_window_last(list_window_t *lw, int length)
+{
+  lw->selected = length-1;
+}
+
+void
+list_window_next_page(list_window_t *lw, int length)
+{
+  int step = lw->rows-1;
+  if( step<= 0 )
+    return;
+  if( lw->selected+step < length-1 )
+    lw->selected+=step;
+  else
+    return list_window_last(lw,length);
+}
+
+void
+list_window_previous_page(list_window_t *lw)
+{
+  int step = lw->rows-1;
+  if( step<= 0 )
+    return;
+  if( lw->selected-step > 0 )
+    lw->selected-=step;
+  else
+    list_window_first(lw);
+}