release v0.29

[ncmpc.git] / src / hscroll.c

diff --git a/src/hscroll.c b/src/hscroll.c
index 372e1484f3bc386ef76bf18f8658f32e872331c8..eae689ee364582f07ecfc833088c67148c0d1929 100644 (file)
--- a/src/hscroll.c
+++ b/src/hscroll.c
@@ -1,66 +1,130 @@
 /* ncmpc (Ncurses MPD Client)
- * (c) 2004-2009 The Music Player Daemon Project
+ * (c) 2004-2017 The Music Player Daemon Project
  * Project homepage: http://musicpd.org
- 
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
-
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
-
+ *
  * You should have received a copy of the GNU General Public License along
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
+ */
 
 #include "hscroll.h"
 #include "charset.h"
+#include "ncfix.h"
 
 #include <assert.h>
 #include <string.h>
 
 char *
-strscroll(struct hscroll *hscroll, char *str, char *separator, unsigned width)
+strscroll(struct hscroll *hscroll, const char *str, const char *separator,
+         unsigned width)
 {
-       gchar *tmp, *buf;
-       gsize len, size;
-
        assert(hscroll != NULL);
        assert(str != NULL);
        assert(separator != NULL);
 
-       if (hscroll->offset == 0)
-               return g_strdup(str);
-
        /* create a buffer containing the string and the separator */
-       size = strlen(str)+strlen(separator)+1;
-       tmp = g_malloc(size);
-       g_strlcpy(tmp, str, size);
-       g_strlcat(tmp, separator, size);
-       len = utf8_width(tmp);
-
-       if (hscroll->offset >= len)
+       char *tmp = replace_locale_to_utf8(g_strconcat(str, separator,
+                                                      str, separator, NULL));
+       if (hscroll->offset >= (unsigned)g_utf8_strlen(tmp, -1) / 2)
                hscroll->offset = 0;
 
        /* create the new scrolled string */
-       size = width+1;
-       if (g_utf8_validate(tmp, -1, NULL) ) {
-               size_t ulen;
-               buf = g_malloc(size*6);// max length of utf8 char is 6
-               g_utf8_strncpy(buf, g_utf8_offset_to_pointer(tmp, hscroll->offset), size);
-               if( (ulen = g_utf8_strlen(buf, -1)) < width )
-                       g_utf8_strncpy(buf+strlen(buf), tmp, size - ulen - 1);
-       } else {
-               buf = g_malloc(size);
-               g_strlcpy(buf, tmp + hscroll->offset, size);
-               if (strlen(buf) < (size_t)width)
-                       g_strlcat(buf, tmp, size);
-       }
+       char *buf = g_utf8_offset_to_pointer(tmp, hscroll->offset);
+       utf8_cut_width(buf, width);
 
+       /* convert back to locale */
+       buf = utf8_to_locale(buf);
        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)
+{
+       assert(hscroll != NULL);
+       assert(hscroll->w != NULL);
+       assert(hscroll->text != NULL);
+
+       /* set stored attributes and color */
+       attr_t old_attrs;
+       short old_pair;
+       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 */
+       char *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);
+}