converter: implemented dsp preset plugin up/down button handlers

1 files changed, 79 insertions, 0 deletions

diff --git a/plugins/converter/convgui.c b/plugins/converter/convgui.c
index 6e8cf1cc..670fa8eb 100644
--- a/plugins/converter/convgui.c
+++ b/plugins/converter/convgui.c
@@ -1020,11 +1020,78 @@ on_dsp_preset_plugin_configure_clicked (GtkButton       *button,
     current_dsp_context = NULL;
 }
 
+static int
+listview_get_index (GtkWidget *list) {
+    GtkTreePath *path;
+    GtkTreeViewColumn *col;
+    gtk_tree_view_get_cursor (GTK_TREE_VIEW (list), &path, &col);
+    if (!path || !col) {
+        // nothing selected
+        return - 1;
+    }
+    int *indices = gtk_tree_path_get_indices (path);
+    int idx = *indices;
+    g_free (indices);
+    return idx;
+}
+
+static int
+swap_items (GtkWidget *list, int idx) {
+    ddb_dsp_context_t *prev = NULL;
+    ddb_dsp_context_t *p = current_ctx->current_dsp_preset->chain;
+
+    int n = idx;
+    while (n > 0 && p) {
+        prev = p;
+        p = p->next;
+        n--;
+    }
+
+    if (!p || !p->next) {
+        return -1;
+    }
+
+    ddb_dsp_context_t *moved = p->next;
+
+    if (!moved) {
+        return -1;
+    }
+
+    ddb_dsp_context_t *last = moved ? moved->next : NULL;
+
+    if (prev) {
+        p->next = last;
+        prev->next = moved;
+        moved->next = p;
+    }
+    else {
+        p->next = last;
+        current_ctx->current_dsp_preset->chain = moved;
+        moved->next = p;
+    }
+    GtkListStore *mdl = GTK_LIST_STORE (gtk_tree_view_get_model (GTK_TREE_VIEW(list)));
+    gtk_list_store_clear (mdl);
+    fill_dsp_preset_chain (mdl);
+    return 0;
+}
+
 void
 on_dsp_preset_plugin_up_clicked        (GtkButton       *button,
                                         gpointer         user_data)
 {
+    GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (button));
+    GtkWidget *list = lookup_widget (toplevel, "plugins");
+    int idx = listview_get_index (list);
+    if (idx <= 0) {
+        return;
+    }
 
+    if (-1 == swap_items (list, idx-1)) {
+        return;
+    }
+    GtkTreePath *path = gtk_tree_path_new_from_indices (idx-1, -1);
+    gtk_tree_view_set_cursor (GTK_TREE_VIEW (list), path, NULL, FALSE);
+    gtk_tree_path_free (path);
 }
 
 
@@ -1032,7 +1099,19 @@ void
 on_dsp_preset_plugin_down_clicked      (GtkButton       *button,
                                         gpointer         user_data)
 {
+    GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (button));
+    GtkWidget *list = lookup_widget (toplevel, "plugins");
+    int idx = listview_get_index (list);
+    if (idx == -1) {
+        return;
+    }
 
+    if (-1 == swap_items (list, idx)) {
+        return;
+    }
+    GtkTreePath *path = gtk_tree_path_new_from_indices (idx+1, -1);
+    gtk_tree_view_set_cursor (GTK_TREE_VIEW (list), path, NULL, FALSE);
+    gtk_tree_path_free (path);
 }