UI: Use operator to set property editor's pinned data-block

This commit removes the custom callback that's currently used to set the
property editor's pinned data, replacing it with an operator. This means
"pin" button doesn't have to be defined in C.

Differential Revision: https://developer.blender.org/D8376

1 files changed, 41 insertions, 0 deletions

diff --git a/source/blender/editors/space_buttons/buttons_ops.c b/source/blender/editors/space_buttons/buttons_ops.c
index a062b178fc8..2e6ad82ef08 100644
--- a/source/blender/editors/space_buttons/buttons_ops.c
+++ b/source/blender/editors/space_buttons/buttons_ops.c
@@ -53,6 +53,47 @@
 #include "buttons_intern.h" /* own include */
 
 /* -------------------------------------------------------------------- */
+/** \name Pin ID Operator
+ * \{ */
+
+static int toggle_pin_exec(bContext *C, wmOperator *UNUSED(op))
+{
+  SpaceProperties *sbuts = CTX_wm_space_properties(C);
+
+  sbuts->flag ^= SB_PIN_CONTEXT;
+
+  /* Create the properties space pointer. */
+  PointerRNA sbuts_ptr;
+  bScreen *screen = CTX_wm_screen(C);
+  RNA_pointer_create(&screen->id, &RNA_SpaceProperties, sbuts, &sbuts_ptr);
+
+  /* Create the new ID pointer and set the the pin ID with RNA
+   * so we can use the property's RNA update functionality. */
+  ID *new_id = (sbuts->flag & SB_PIN_CONTEXT) ? buttons_context_id_path(C) : NULL;
+  PointerRNA new_id_ptr;
+  RNA_id_pointer_create(new_id, &new_id_ptr);
+  RNA_pointer_set(&sbuts_ptr, "pin_id", new_id_ptr);
+
+  ED_area_tag_redraw(CTX_wm_area(C));
+
+  return OPERATOR_FINISHED;
+}
+
+void BUTTONS_OT_toggle_pin(wmOperatorType *ot)
+{
+  /* Identifiers. */
+  ot->name = "Toggle Pin ID";
+  ot->description = "Keep the current data-block displayed";
+  ot->idname = "BUTTONS_OT_toggle_pin";
+
+  /* Callbacks. */
+  ot->exec = toggle_pin_exec;
+  ot->poll = ED_operator_buttons_active;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
 /** \name Context Menu Operator
  * \{ */