Moved list window fuctions to list_window.c.

Added function list_window_cmd() for basic commands (movment).



git-svn-id: https://svn.musicpd.org/ncmpc/trunk@454 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 206 insertions, 0 deletions

diff --git a/list_window.c b/list_window.c
new file mode 100644
index 000000000..21ee9119f
--- /dev/null
+++ b/list_window.c
@@ -0,0 +1,206 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <glib.h>
+#include <ncurses.h>
+
+#include "support.h"
+#include "command.h"
+#include "list_window.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_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);
+}
+
+
+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);
+	}
+    }
+}
+
+
+int
+list_window_find(list_window_t *lw, 
+		 list_window_callback_fn_t callback,
+		 void *callback_data,
+		 char *str)
+{
+  int h;
+  int i = lw->selected+1;
+  char *label;
+
+  while( (label=(callback) (i,&h,callback_data)) )
+    {
+      if( str && label && strcasestr(label, str) )
+	{
+	  lw->selected = i;
+	  return 0;
+	}
+      i++;
+    }
+  return 1;
+}
+
+
+/* perform basic list window commands (movement) */
+int 
+list_window_cmd(list_window_t *lw, int rows, command_t cmd)
+{
+  switch(cmd)
+    {
+    case CMD_LIST_PREVIOUS:
+      list_window_previous(lw);
+      lw->repaint=1;
+      break;
+    case CMD_LIST_NEXT:
+      list_window_next(lw, rows);
+      lw->repaint=1;
+      break;
+    case CMD_LIST_FIRST:
+      list_window_first(lw);
+      lw->repaint  = 1;
+      break;
+    case CMD_LIST_LAST:
+      list_window_last(lw, rows);
+      lw->repaint = 1;
+      break;
+    case CMD_LIST_NEXT_PAGE:
+      list_window_next_page(lw, rows);
+      lw->repaint  = 1;
+      break;
+    case CMD_LIST_PREVIOUS_PAGE:
+      list_window_previous_page(lw);
+      lw->repaint  = 1;
+      break;
+    default:
+      return 0;
+    }
+  return 1;
+}