player: add --term-osd-bar, which shows a status bar on the terminal

Feature request from github issue #451. Disabled by default, will
probably stay this way.

DOCS/man/en/options.rst

@@ -2380,6 +2380,18 @@ OPTIONS
 
     ``force`` enables terminal OSD even if a video window is created.
 
+``--term-osd-bar``, ``--no-term-osd-bar``
+    Enable printing a progress bar under the status line on the terminal.
+    (Disabled by default.)
+
+``--term-osd-bar-chars=<string>``
+    Customize the ``--term-osd-bar`` feature. The string is expected to
+    consist of 5 characters (start, left space, position indicator,
+    right space, end). You can use unicode characters, but note that double-
+    width characters will not be treated correctly.
+
+    Default: ``[-+-]``.
+
 ``--title=<string>``
     Set the window title. Properties are expanded on playback start.
     (See `Property Expansion`_.)

options/options.c

@@ -597,6 +597,9 @@ const m_option_t mp_opts[] = {
                 {"auto", 2},
                 {"no", 0})),
 
+    OPT_FLAG("term-osd-bar", term_osd_bar, 0),
+    OPT_STRING("term-osd-bar-chars", term_osd_bar_chars, 0),
+
     OPT_STRING("playing-msg", playing_msg, M_OPT_PARSE_ESCAPES),
     OPT_STRING("status-msg", status_msg, M_OPT_PARSE_ESCAPES),
     OPT_STRING("osd-status-msg", osd_status_msg, M_OPT_PARSE_ESCAPES),
@@ -702,6 +705,7 @@ const struct MPOpts mp_default_opts = {
     .user_pts_assoc_mode = 1,
     .initial_audio_sync = 1,
     .term_osd = 2,
+    .term_osd_bar_chars = "[-+-]",
     .consolecontrols = 1,
     .play_frames = -1,
     .keep_open = 0,

options/options.h

@@ -124,6 +124,8 @@ typedef struct MPOpts {
     int softsleep;
     int frame_dropping;
     int term_osd;
+    int term_osd_bar;
+    char *term_osd_bar_chars;
     char *playing_msg;
     char *status_msg;
     char *osd_status_msg;

player/osd.c

@@ -103,6 +103,29 @@ static void term_osd_set_status(struct MPContext *mpctx, const char *text)
     term_osd_update(mpctx);
 }
 
+static void add_term_osd_bar(struct MPContext *mpctx, char **line, int width)
+{
+    struct MPOpts *opts = mpctx->opts;
+
+    if (width < 5)
+        return;
+
+    int pos = get_percent_pos(mpctx) / 100.0 * (width - 2);
+
+    bstr chars = bstr0(opts->term_osd_bar_chars);
+    bstr parts[5];
+    for (int n = 0; n < 5; n++)
+        parts[n] = bstr_split_utf8(chars, &chars);
+
+    saddf(line, "%.*s", BSTR_P(parts[0]));
+    for (int n = 0; n < pos; n++)
+        saddf(line, "%.*s", BSTR_P(parts[1]));
+    saddf(line, "%.*s", BSTR_P(parts[2]));
+    for (int n = 0; n < width - 2 - pos - 1; n++)
+        saddf(line, "%.*s", BSTR_P(parts[3]));
+    saddf(line, "%.*s", BSTR_P(parts[4]));
+}
+
 void print_status(struct MPContext *mpctx)
 {
     struct MPOpts *opts = mpctx->opts;
@@ -182,6 +205,12 @@ void print_status(struct MPContext *mpctx)
     if (cache >= 0)
         saddf(&line, " Cache: %d%%", cache);
 
+    if (opts->term_osd_bar) {
+        saddf(&line, "\n");
+        get_screen_size();
+        add_term_osd_bar(mpctx, &line, screen_width);
+    }
+
     // end
     term_osd_set_status(mpctx, line);
     talloc_free(line);