Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/blenkernel/intern/callbacks.cc

@@ -0,0 +1,138 @@
+/* SPDX-FileCopyrightText: 2023 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+/** \file
+ * \ingroup bke
+ */
+
+#include "BLI_listbase.h"
+
+#include "BKE_callbacks.hh"
+
+#include "MEM_guardedalloc.h"
+
+#include "RNA_access.hh"
+#include "RNA_prototypes.hh"
+
+namespace blender {
+
+static ListBaseT<bCallbackFuncStore> callback_slots[BKE_CB_EVT_TOT] = {{nullptr}};
+
+static bool callbacks_initialized = false;
+
+#define ASSERT_CALLBACKS_INITIALIZED() \
+  BLI_assert_msg(callbacks_initialized, \
+                 "Callbacks should be initialized with BKE_callback_global_init() before using " \
+                 "the callback system.")
+
+void BKE_callback_exec(Main *bmain, PointerRNA **pointers, const int pointers_num, eCbEvent evt)
+{
+  ASSERT_CALLBACKS_INITIALIZED();
+
+  /* Use mutable iteration so handlers are able to remove themselves. */
+  ListBaseT<bCallbackFuncStore> *lb = &callback_slots[evt];
+  for (bCallbackFuncStore &funcstore : lb->items_mutable()) {
+    funcstore.func(bmain, pointers, pointers_num, funcstore.arg);
+  }
+}
+
+void BKE_callback_exec_null(Main *bmain, eCbEvent evt)
+{
+  BKE_callback_exec(bmain, nullptr, 0, evt);
+}
+
+void BKE_callback_exec_id(Main *bmain, ID *id, eCbEvent evt)
+{
+  PointerRNA id_ptr = RNA_id_pointer_create(id);
+
+  PointerRNA *pointers[1] = {&id_ptr};
+
+  BKE_callback_exec(bmain, pointers, ARRAY_SIZE(pointers), evt);
+}
+
+void BKE_callback_exec_id_depsgraph(Main *bmain, ID *id, Depsgraph *depsgraph, eCbEvent evt)
+{
+  PointerRNA id_ptr = RNA_id_pointer_create(id);
+
+  PointerRNA depsgraph_ptr = RNA_pointer_create_discrete(nullptr, RNA_Depsgraph, depsgraph);
+
+  PointerRNA *pointers[2] = {&id_ptr, &depsgraph_ptr};
+
+  BKE_callback_exec(bmain, pointers, ARRAY_SIZE(pointers), evt);
+}
+
+void BKE_callback_exec_boolean(Main *bmain, bool value, eCbEvent evt)
+{
+  PrimitiveBooleanRNA data = {};
+  data.value = value;
+  PointerRNA boolean_ptr = RNA_pointer_create_discrete(nullptr, RNA_PrimitiveBoolean, &data);
+
+  PointerRNA *pointers[1] = {&boolean_ptr};
+
+  BKE_callback_exec(bmain, pointers, ARRAY_SIZE(pointers), evt);
+}
+
+void BKE_callback_exec_string(Main *bmain, const char *str, eCbEvent evt)
+{
+  PrimitiveStringRNA data = {nullptr};
+  data.value = str;
+  PointerRNA str_ptr = RNA_pointer_create_discrete(nullptr, RNA_PrimitiveString, &data);
+
+  PointerRNA *pointers[1] = {&str_ptr};
+
+  BKE_callback_exec(bmain, pointers, ARRAY_SIZE(pointers), evt);
+}
+
+void BKE_callback_add(bCallbackFuncStore *funcstore, eCbEvent evt)
+{
+  ASSERT_CALLBACKS_INITIALIZED();
+  ListBaseT<bCallbackFuncStore> *lb = &callback_slots[evt];
+  BLI_addtail(lb, funcstore);
+}
+
+void BKE_callback_remove(bCallbackFuncStore *funcstore, eCbEvent evt)
+{
+  /* The callback may have already been removed by BKE_callback_global_finalize(), for
+   * example when removing callbacks in response to a BKE_blender_atexit_register callback
+   * function. `BKE_blender_atexit()` runs after `BKE_callback_global_finalize()`. */
+  if (!callbacks_initialized) {
+    return;
+  }
+
+  ListBaseT<bCallbackFuncStore> *lb = &callback_slots[evt];
+
+  /* Be noisy about potential programming errors. */
+  BLI_assert_msg(BLI_findindex(lb, funcstore) != -1, "To-be-removed callback not found");
+
+  BLI_remlink(lb, funcstore);
+
+  if (funcstore->alloc) {
+    MEM_delete(funcstore);
+  }
+}
+
+void BKE_callback_global_init()
+{
+  callbacks_initialized = true;
+}
+
+void BKE_callback_global_finalize()
+{
+  for (int evt_i = 0; evt_i < BKE_CB_EVT_TOT; evt_i++) {
+    const eCbEvent evt = eCbEvent(evt_i);
+    ListBaseT<bCallbackFuncStore> *lb = &callback_slots[evt];
+    bCallbackFuncStore *funcstore;
+    bCallbackFuncStore *funcstore_next;
+    for (funcstore = static_cast<bCallbackFuncStore *>(lb->first); funcstore;
+         funcstore = funcstore_next)
+    {
+      funcstore_next = funcstore->next;
+      BKE_callback_remove(funcstore, evt);
+    }
+  }
+
+  callbacks_initialized = false;
+}
+
+}  // namespace blender