AUTHORS: add Jonathan Neuschäfer

[ncmpc.git] / src / hscroll.c

diff --git a/src/hscroll.c b/src/hscroll.c
index ace5bde9e4b4876cc33c98b7cf9ae719c768b6fc..dafae93dee2dc3a0d9190267c34aa62e0e63d54d 100644 (file)
--- a/src/hscroll.c
+++ b/src/hscroll.c
@@ -1,5 +1,5 @@
 /* ncmpc (Ncurses MPD Client)
- * (c) 2004-2009 The Music Player Daemon Project
+ * (c) 2004-2010 The Music Player Daemon Project
  * Project homepage: http://musicpd.org
  
  * This program is free software; you can redistribute it and/or modify
@@ -19,6 +19,8 @@
 
 #include "hscroll.h"
 #include "charset.h"
+#include "ncfix.h"
+#include "glib_compat.h"
 
 #include <assert.h>
 #include <string.h>
@@ -49,3 +51,86 @@ strscroll(struct hscroll *hscroll, const char *str, const char *separator,
        g_free(tmp);
        return buf;
 }
+
+/**
+ * This timer scrolls the area by one and redraws.
+ */
+static gboolean
+hscroll_timer_callback(gpointer data)
+{
+       struct hscroll *hscroll = data;
+
+       hscroll_step(hscroll);
+       hscroll_draw(hscroll);
+       wrefresh(hscroll->w);
+       return true;
+}
+
+void
+hscroll_set(struct hscroll *hscroll, unsigned x, unsigned y, unsigned width,
+           const char *text)
+{
+       assert(hscroll != NULL);
+       assert(hscroll->w != NULL);
+       assert(text != NULL);
+
+       if (hscroll->text != NULL && hscroll->x == x && hscroll->y == y &&
+           hscroll->width == width && strcmp(hscroll->text, text) == 0)
+               /* no change, do nothing (and, most importantly, do
+                  not reset the current offset!) */
+               return;
+
+       hscroll_clear(hscroll);
+
+       hscroll->x = x;
+       hscroll->y = y;
+       hscroll->width = width;
+
+       /* obtain the ncurses attributes and the current color, store
+          them */
+       fix_wattr_get(hscroll->w, &hscroll->attrs, &hscroll->pair, NULL);
+
+       hscroll->text = g_strdup(text);
+       hscroll->offset = 0;
+       hscroll->source_id = g_timeout_add_seconds(1, hscroll_timer_callback,
+                                                  hscroll);
+}
+
+void
+hscroll_clear(struct hscroll *hscroll)
+{
+       assert(hscroll != NULL);
+
+       if (hscroll->text == NULL)
+               return;
+
+       g_source_remove(hscroll->source_id);
+
+       g_free(hscroll->text);
+       hscroll->text = NULL;
+}
+
+void
+hscroll_draw(struct hscroll *hscroll)
+{
+       attr_t old_attrs;
+       short old_pair;
+       char *p;
+
+       assert(hscroll != NULL);
+       assert(hscroll->w != NULL);
+       assert(hscroll->text != NULL);
+
+       /* set stored attributes and color */
+       fix_wattr_get(hscroll->w, &old_attrs, &old_pair, NULL);
+       wattr_set(hscroll->w, hscroll->attrs, hscroll->pair, NULL);
+
+       /* scroll the string, and draw it */
+       p = strscroll(hscroll, hscroll->text, hscroll->separator,
+                     hscroll->width);
+       mvwaddstr(hscroll->w, hscroll->y, hscroll->x, p);
+       g_free(p);
+
+       /* restore previous attributes and color */
+       wattr_set(hscroll->w, old_attrs, old_pair, NULL);
+}