dialog_Progress replacement for intf_UserProgress

include/vlc_dialog.h

@@ -96,6 +96,26 @@ VLC_EXPORT( int, dialog_Question, (vlc_object_t *, const char *, const char *, c
 #define dialog_Question(o, t, m, y, n, c) \
         dialog_Question(VLC_OBJECT(o), t, m, y, n, c)
 
+typedef struct dialog_progress_bar_t
+{   /* Request-time parameters */
+    const char *title;
+    const char *message;
+    const char *cancel;
+    /* Permanent parameters */
+    vlc_mutex_t lock;
+    void (*pf_update) (void *, float);
+    bool (*pf_check) (void *);
+    void (*pf_destroy) (void *);
+    void *p_sys;
+} dialog_progress_bar_t;
+
+VLC_EXPORT( dialog_progress_bar_t *, dialog_ProgressCreate, (vlc_object_t *, const char *, const char *, const char *) );
+#define dialog_ProgressCreate(o, t, m, c) \
+        dialog_ProgressCreate(VLC_OBJECT(o), t, m, c)
+VLC_EXPORT( void, dialog_ProgressDestroy, (dialog_progress_bar_t *) );
+VLC_EXPORT( void, dialog_ProgressSet, (dialog_progress_bar_t *, float) );
+VLC_EXPORT( bool, dialog_ProgressCancelled, (dialog_progress_bar_t *) );
+
 VLC_EXPORT( int, dialog_Register, (vlc_object_t *) );
 VLC_EXPORT( int, dialog_Unregister, (vlc_object_t *) );
 #define dialog_Register(o) dialog_Register(VLC_OBJECT(o))

src/interface/dialog.c

@@ -194,3 +194,66 @@ int dialog_Question (vlc_object_t *obj, const char *title, const char *text,
     vlc_object_release (provider);
     return dialog.answer;
 }
+
+#undef dialog_ProgressCreate
+/**
+ * Creates a progress bar dialog.
+ */
+dialog_progress_bar_t *
+dialog_ProgressCreate (vlc_object_t *obj, const char *title,
+                       const char *message, const char *cancel)
+{
+    if (obj->i_flags & OBJECT_FLAGS_NOINTERACT)
+        return NULL;
+
+    vlc_object_t *provider = dialog_GetProvider (obj);
+    if (provider == NULL)
+        return NULL;
+
+    dialog_progress_bar_t *dialog = malloc (sizeof (*dialog));
+    if (dialog != NULL)
+    {
+        dialog->title = title;
+        dialog->message = message;
+        dialog->cancel = cancel;
+        var_SetAddress (provider, "dialog-progress-bar", dialog);
+#ifndef NDEBUG
+        dialog->title = dialog->message = dialog->cancel = NULL;
+#endif
+        assert (dialog->pf_update);
+        assert (dialog->pf_check);
+        assert (dialog->pf_destroy);
+    }
+
+    /* FIXME: This could conceivably crash if the dialog provider is destroyed
+     * before the dialog user. Holding the provider does not help, as it only
+     * protects object variable operations. For instance, it does not prevent
+     * unloading of the interface plugin. In the short term, the only solution
+     * is to not use progress dialog after deinitialization of the interfaces.
+     */
+    vlc_object_release (provider);
+    return dialog;
+}
+
+void dialog_ProgressDestroy (dialog_progress_bar_t *dialog)
+{
+    assert (dialog);
+
+    dialog->pf_destroy (dialog->p_sys);
+    free (dialog);
+}
+
+void dialog_ProgressSet (dialog_progress_bar_t *dialog, float value)
+{
+    assert (dialog);
+
+    dialog->pf_update (dialog->p_sys, value);
+}
+
+bool dialog_ProgressCancelled (dialog_progress_bar_t *dialog)
+{
+    assert (dialog);
+
+    return dialog->pf_check (dialog->p_sys);
+}
+

src/libvlccore.sym

@@ -103,6 +103,10 @@ demux_PacketizerDestroy
 demux_PacketizerNew
 demux_vaControlHelper
 dialog_Login
+dialog_ProgressCancelled
+dialog_ProgressCreate
+dialog_ProgressDestroy
+dialog_ProgressSet
 dialog_Question
 dialog_Register
 dialog_Unregister