ges: Handle trimming in groups

This was broken, clips where moving all around, make it behave properly.

ges/ges-clip.c

@@ -1395,6 +1395,8 @@ _trim (GESTimelineElement * element, GstClockTime start)
     GESTrackElement *track_element =
         GES_TRACK_ELEMENT (GES_CONTAINER_CHILDREN (element)->data);
 
+    GST_DEBUG_OBJECT (element, "Trimming child: %" GST_PTR_FORMAT,
+        track_element);
     ret = timeline_trim_object (timeline, track_element, NULL, GES_EDGE_START,
         start);
   }

ges/ges-container.c

@@ -315,26 +315,46 @@ _child_start_changed_cb (GESTimelineElement * child,
     GParamSpec * arg G_GNUC_UNUSED, GESContainer * container)
 {
   ChildMapping *map;
+  GstClockTime start;
 
   GESContainerPrivate *priv = container->priv;
   GESTimelineElement *element = GES_TIMELINE_ELEMENT (container);
 
-  if (container->children_control_mode == GES_CHILDREN_IGNORE_NOTIFIES)
-    return;
-
   map = g_hash_table_lookup (priv->mappings, child);
   g_assert (map);
 
-  if (container->children_control_mode == GES_CHILDREN_UPDATE_OFFSETS) {
-    map->start_offset = _START (container) - _START (child);
+  switch (container->children_control_mode) {
+    case GES_CHILDREN_IGNORE_NOTIFIES:
+      return;
+    case GES_CHILDREN_UPDATE_ALL_VALUES:
+      _ges_container_sort_children (container);
+      start = container->children ?
+          _START (container->children->data) : _START (container);
 
-    return;
+      if (start != _START (container)) {
+        _DURATION (container) = _END (container) - start;
+        _START (container) = start;
+
+        GST_DEBUG_OBJECT (container, "Child move made us "
+            "move to %" GST_TIME_FORMAT, GST_TIME_ARGS (_START (container)));
+
+        g_object_notify (G_OBJECT (container), "start");
+      }
+
+      /* Falltrough! */
+    case GES_CHILDREN_UPDATE_OFFSETS:
+      map->start_offset = _START (container) - _START (child);
+      break;
+
+    case GES_CHILDREN_UPDATE:
+      /* We update all the children calling our set_start method */
+      container->initiated_move = child;
+      _set_start0 (element, _START (child) + map->start_offset);
+      container->initiated_move = NULL;
+      break;
+    default:
+      break;
   }
-
-  /* We update all the children calling our set_start method */
-  container->initiated_move = child;
-  _set_start0 (element, _START (child) + map->start_offset);
-  container->initiated_move = NULL;
 }
 
 static void
@@ -370,6 +390,8 @@ _child_duration_changed_cb (GESTimelineElement * child,
 {
   ChildMapping *map;
 
+  GList *tmp;
+  GstClockTime end = 0;
   GESContainerPrivate *priv = container->priv;
   GESTimelineElement *element = GES_TIMELINE_ELEMENT (container);
 
@@ -379,16 +401,32 @@ _child_duration_changed_cb (GESTimelineElement * child,
   map = g_hash_table_lookup (priv->mappings, child);
   g_assert (map);
 
-  if (container->children_control_mode == GES_CHILDREN_UPDATE_OFFSETS) {
-    map->inpoint_offset = _START (container) - _START (child);
+  switch (container->children_control_mode) {
+    case GES_CHILDREN_IGNORE_NOTIFIES:
+      break;
+    case GES_CHILDREN_UPDATE_ALL_VALUES:
+      _ges_container_sort_children_by_end (container);
 
-    return;
+      for (tmp = container->children; tmp; tmp = tmp->next)
+        end = MAX (end, _END (tmp->data));
+
+      if (end != _END (container)) {
+        _DURATION (container) = end - _START (container);
+        g_object_notify (G_OBJECT (container), "duration");
+      }
+      /* Falltrough */
+    case GES_CHILDREN_UPDATE_OFFSETS:
+      map->inpoint_offset = _START (container) - _START (child);
+      break;
+    case GES_CHILDREN_UPDATE:
+      /* We update all the children calling our set_duration method */
+      container->initiated_move = child;
+      _set_duration0 (element, _DURATION (child) + map->duration_offset);
+      container->initiated_move = NULL;
+      break;
+    default:
+      break;
   }
-
-  /* We update all the children calling our set_duration method */
-  container->initiated_move = child;
-  _set_duration0 (element, _DURATION (child) + map->duration_offset);
-  container->initiated_move = NULL;
 }
 
 /****************************************************

ges/ges-container.h

@@ -44,6 +44,7 @@ typedef enum
   GES_CHILDREN_UPDATE,
   GES_CHILDREN_IGNORE_NOTIFIES,
   GES_CHILDREN_UPDATE_OFFSETS,
+  GES_CHILDREN_UPDATE_ALL_VALUES,
   GES_CHILDREN_LAST
 } GESChildrenControlMode;
 

ges/ges-group.c

@@ -185,7 +185,7 @@ static gboolean
 _trim (GESTimelineElement * group, GstClockTime start)
 {
   GList *tmp;
-  GstClockTime last_child_end = 0;
+  GstClockTime last_child_end = 0, oldstart = _START (group);
   GESContainer *container = GES_CONTAINER (group);
   GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (group);
   gboolean ret = TRUE, expending = (start < _START (group));
@@ -201,10 +201,12 @@ _trim (GESTimelineElement * group, GstClockTime start)
     GESTimelineElement *child = tmp->data;
 
     if (expending) {
-      /* If the start if bigger, we do not touch it (in case we are expending)
-       */
-      if (_START (child) > _START (group))
+      /* If the start is bigger, we do not touch it (in case we are expending) */
+      if (_START (child) > oldstart) {
+        GST_DEBUG_OBJECT (child, "Skipping as not at begining of the group");
         continue;
+      }
+
       ret &= ges_timeline_element_trim (child, start);
     } else {
       if (start > _END (child))

ges/ges-timeline.c

@@ -1363,6 +1363,28 @@ ges_timeline_trim_object_simple (GESTimeline * timeline,
 
   switch (edge) {
     case GES_EDGE_START:
+    {
+      GESTimelineElement *toplevel;
+      GESChildrenControlMode old_mode;
+      toplevel = ges_timeline_element_get_toplevel_parent (element);
+
+      if (position < _START (toplevel) && _START (toplevel) < _START (element)) {
+        GST_DEBUG_OBJECT (toplevel, "Not trimming %p as not at begining "
+            "of the container", element);
+
+        return FALSE;
+      }
+
+      old_mode = GES_CONTAINER (toplevel)->children_control_mode;
+      if (GES_IS_GROUP (toplevel) && old_mode == GES_CHILDREN_UPDATE) {
+        GST_DEBUG_OBJECT (toplevel, "Setting children udpate mode to"
+            " UPDDATE_ALL_VALUES so we can trim without moving the contained");
+        /* The container will update its values itself according to new
+         * values of the children */
+        GES_CONTAINER (toplevel)->children_control_mode =
+            GES_CHILDREN_UPDATE_ALL_VALUES;
+      }
+
       inpoint = _INPOINT (track_element);
       duration = _DURATION (track_element);
 
@@ -1393,7 +1415,12 @@ ges_timeline_trim_object_simple (GESTimeline * timeline,
       timeline->priv->needs_transitions_update = TRUE;
 
       _set_duration0 (GES_TIMELINE_ELEMENT (track_element), duration);
+      if (GES_IS_GROUP (toplevel))
+        GES_CONTAINER (toplevel)->children_control_mode = old_mode;
+
+      gst_object_unref (toplevel);
       break;
+    }
     case GES_EDGE_END:
     {
       cur = g_hash_table_lookup (timeline->priv->by_end, track_element);

tests/check/ges/timelineedition.c

@@ -1150,6 +1150,22 @@ GST_START_TEST (test_groups)
   check_layer (c4, 1);
   check_layer (c5, 2);
 
+  fail_unless (ges_container_edit (GES_CONTAINER (c), NULL, 0,
+          GES_EDIT_MODE_TRIM, GES_EDGE_START, 5) == TRUE);
+  CHECK_OBJECT_PROPS (c, 5, 5, 5);
+  CHECK_OBJECT_PROPS (c1, 10, 0, 10);
+  CHECK_OBJECT_PROPS (c2, 20, 0, 20);
+  CHECK_OBJECT_PROPS (c3, 40, 10, 10);
+  CHECK_OBJECT_PROPS (c4, 40, 0, 20);
+  CHECK_OBJECT_PROPS (c5, 50, 0, 20);
+  CHECK_OBJECT_PROPS (group, 5, 0, 35);
+  check_layer (c, 0);
+  check_layer (c1, 1);
+  check_layer (c2, 1);
+  check_layer (c3, 0);
+  check_layer (c4, 1);
+  check_layer (c5, 2);
+
   gst_object_unref (timeline);
   gst_object_unref (asset);
 }