Pose Library: remove assumption about Action group names

Remove the assumption of the pose library that Action groups are named
after the bones in the armature. Even though this assumption is correct
when the keys are created by Blender, action groups can be renamed. Keys
created by Python scripts can also use arbitrary group names.

Since there is more code in Blender making this assumption, and looping
over selected bones is also a common occurrence, this commit contains
some generic functionality to aid in this:

- `BKE_armature_find_selected_bones`: function that iterates over all
  bones in an armature and calls a callback for each selected one. It
  returns a struct with info about the selection states (all or no bones
  selected).
- `BKE_armature_find_selected_bone_names(armature)` uses the above
  function to return a set of selected bone names.
- `BKE_pose_find_fcurves_with_bones()` calls a callback for each FCurve
  in an Action that targets a bone, also passing it the bone name.

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/blenkernel/CMakeLists.txt b/source/blender/blenkernel/CMakeLists.txt
index 527996ee46d..e8f31ae72c0 100644
--- a/source/blender/blenkernel/CMakeLists.txt
+++ b/source/blender/blenkernel/CMakeLists.txt
@@ -69,6 +69,7 @@ set(SRC
   intern/CCGSubSurf_util.c
   intern/DerivedMesh.cc
   intern/action.c
+  intern/action_bones.cc
   intern/action_mirror.c
   intern/addon.c
   intern/anim_data.c
@@ -77,6 +78,7 @@ set(SRC
   intern/anim_visualization.c
   intern/appdir.c
   intern/armature.c
+  intern/armature_selection.cc
   intern/armature_deform.c
   intern/armature_pose.cc
   intern/armature_update.c
@@ -287,6 +289,7 @@ set(SRC
 
   BKE_DerivedMesh.h
   BKE_action.h
+  BKE_action.hh
   BKE_addon.h
   BKE_anim_data.h
   BKE_anim_path.h
@@ -294,6 +297,7 @@ set(SRC
   BKE_animsys.h
   BKE_appdir.h
   BKE_armature.h
+  BKE_armature.hh
   BKE_asset.h
   BKE_attribute.h
   BKE_attribute_access.hh