win32: make taskbar progress indication optional

Add --taskbar-progress command line option and property which controls taskbar
progress indication rendering in Windows 7+. This option is on by default and
can be toggled during playback.

This option does not affect the creation process of ITaskbarList3. When the
option is turned off the progress bar is just hidden with TBPF_NOPROGRESS.

Closes #2535

2 files changed, 31 insertions, 4 deletions

diff --git a/player/command.c b/player/command.c
index 66d3b6fc42..8ff2914c66 100644
--- a/player/command.c
+++ b/player/command.c
@@ -2409,6 +2409,23 @@ static int mp_property_fullscreen(void *ctx, struct m_property *prop,
     return r;
 }
 
+/// Show playback progress in Windows 7+ taskbar (RW)
+static int mp_property_taskbar_progress(void *ctx, struct m_property *prop,
+                             int action, void *arg)
+{
+    MPContext *mpctx = ctx;
+    if (action == M_PROPERTY_SET) {
+        int desired = !!*(int *) arg;
+        if (mpctx->opts->vo.taskbar_progress == desired)
+            return M_PROPERTY_OK;
+        mpctx->opts->vo.taskbar_progress = desired;
+        if (mpctx->video_out)
+            update_vo_playback_state( mpctx );
+        return M_PROPERTY_OK;
+    }
+    return mp_property_generic_option(mpctx, prop, action, arg);
+}
+
 /// Window always on top (RW)
 static int mp_property_ontop(void *ctx, struct m_property *prop,
                              int action, void *arg)
@@ -3703,6 +3720,7 @@ static const struct m_property mp_properties[] = {
     {"fullscreen", mp_property_fullscreen},
     {"deinterlace", mp_property_deinterlace},
     {"field-dominance", mp_property_generic_option},
+    {"taskbar-progress", mp_property_taskbar_progress},
     {"ontop", mp_property_ontop},
     {"border", mp_property_border},
     {"on-all-workspaces", mp_property_all_workspaces},
@@ -4036,6 +4054,7 @@ static const struct property_osd_display {
     { "balance", "Balance", .osd_progbar = OSD_BALANCE },
     // video
     { "panscan", "Panscan", .osd_progbar = OSD_PANSCAN },
+    { "taskbar-progress", "Progress in taskbar" },
     { "ontop", "Stay on top" },
     { "border", "Border" },
     { "framedrop", "Framedrop" },
diff --git a/player/misc.c b/player/misc.c
index f14f5a43e3..941c493cf2 100644
--- a/player/misc.c
+++ b/player/misc.c
@@ -116,16 +116,24 @@ void update_vo_playback_state(struct MPContext *mpctx)
     if (mpctx->video_out) {
         struct voctrl_playback_state oldstate = mpctx->vo_playback_state;
         struct voctrl_playback_state newstate = {
+            .taskbar_progress = mpctx->opts->vo.taskbar_progress,
             .playing = mpctx->playing,
             .paused = mpctx->paused,
             .percent_pos = get_percent_pos(mpctx),
         };
 
-        if (oldstate.playing != newstate.playing ||
+        if (oldstate.taskbar_progress != newstate.taskbar_progress ||
+            oldstate.playing != newstate.playing ||
             oldstate.paused != newstate.paused ||
-            oldstate.percent_pos != newstate.percent_pos) {
-            vo_control(mpctx->video_out,
-                       VOCTRL_UPDATE_PLAYBACK_STATE, &newstate);
+            oldstate.percent_pos != newstate.percent_pos)
+        {
+            // Don't update progress bar if it was and still is hidden
+            if ((oldstate.playing && oldstate.taskbar_progress) ||
+                (newstate.playing && newstate.taskbar_progress))
+            {
+                vo_control(mpctx->video_out,
+                           VOCTRL_UPDATE_PLAYBACK_STATE, &newstate);
+            }
             mpctx->vo_playback_state = newstate;
         }
     } else {