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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2022 Blender Foundation. */
#include "DNA_ID.h"
#include "BKE_idtype.h"
#include "BKE_lib_id.h"
#include "BKE_lib_remap.h"
#include "MEM_guardedalloc.h"
#include "BLI_map.hh"
using IDTypeFilter = uint64_t;
namespace blender::bke::id::remapper {
struct IDRemapper {
private:
Map<ID *, ID *> mappings;
IDTypeFilter source_types = 0;
public:
void clear()
{
mappings.clear();
source_types = 0;
}
bool is_empty() const
{
return mappings.is_empty();
}
void add(ID *old_id, ID *new_id)
{
BLI_assert(old_id != nullptr);
BLI_assert(new_id == nullptr || (GS(old_id->name) == GS(new_id->name)));
mappings.add(old_id, new_id);
BLI_assert(BKE_idtype_idcode_to_idfilter(GS(old_id->name)) != 0);
source_types |= BKE_idtype_idcode_to_idfilter(GS(old_id->name));
}
bool contains_mappings_for_any(IDTypeFilter filter) const
{
return (source_types & filter) != 0;
}
IDRemapperApplyResult get_mapping_result(ID *id,
IDRemapperApplyOptions options,
const ID *id_self) const
{
if (!mappings.contains(id)) {
return ID_REMAP_RESULT_SOURCE_UNAVAILABLE;
}
const ID *new_id = mappings.lookup(id);
if ((options & ID_REMAP_APPLY_UNMAP_WHEN_REMAPPING_TO_SELF) != 0 && id_self == new_id) {
new_id = nullptr;
}
if (new_id == nullptr) {
return ID_REMAP_RESULT_SOURCE_UNASSIGNED;
}
return ID_REMAP_RESULT_SOURCE_REMAPPED;
}
IDRemapperApplyResult apply(ID **r_id_ptr, IDRemapperApplyOptions options, ID *id_self) const
{
BLI_assert(r_id_ptr != nullptr);
if (*r_id_ptr == nullptr) {
return ID_REMAP_RESULT_SOURCE_NOT_MAPPABLE;
}
if (!mappings.contains(*r_id_ptr)) {
return ID_REMAP_RESULT_SOURCE_UNAVAILABLE;
}
if (options & ID_REMAP_APPLY_UPDATE_REFCOUNT) {
id_us_min(*r_id_ptr);
}
*r_id_ptr = mappings.lookup(*r_id_ptr);
if (options & ID_REMAP_APPLY_UNMAP_WHEN_REMAPPING_TO_SELF && *r_id_ptr == id_self) {
*r_id_ptr = nullptr;
}
if (*r_id_ptr == nullptr) {
return ID_REMAP_RESULT_SOURCE_UNASSIGNED;
}
if (options & ID_REMAP_APPLY_UPDATE_REFCOUNT) {
/* Do not handle LIB_TAG_INDIRECT/LIB_TAG_EXTERN here. */
id_us_plus_no_lib(*r_id_ptr);
}
if (options & ID_REMAP_APPLY_ENSURE_REAL) {
id_us_ensure_real(*r_id_ptr);
}
return ID_REMAP_RESULT_SOURCE_REMAPPED;
}
void iter(IDRemapperIterFunction func, void *user_data) const
{
for (auto item : mappings.items()) {
func(item.key, item.value, user_data);
}
}
};
} // namespace blender::bke::id::remapper
/** \brief wrap CPP IDRemapper to a C handle. */
static IDRemapper *wrap(blender::bke::id::remapper::IDRemapper *remapper)
{
return static_cast<IDRemapper *>(static_cast<void *>(remapper));
}
/** \brief wrap C handle to a CPP IDRemapper. */
static blender::bke::id::remapper::IDRemapper *unwrap(IDRemapper *remapper)
{
return static_cast<blender::bke::id::remapper::IDRemapper *>(static_cast<void *>(remapper));
}
/** \brief wrap C handle to a CPP IDRemapper. */
static const blender::bke::id::remapper::IDRemapper *unwrap(const IDRemapper *remapper)
{
return static_cast<const blender::bke::id::remapper::IDRemapper *>(
static_cast<const void *>(remapper));
}
extern "C" {
IDRemapper *BKE_id_remapper_create(void)
{
blender::bke::id::remapper::IDRemapper *remapper =
MEM_new<blender::bke::id::remapper::IDRemapper>(__func__);
return wrap(remapper);
}
void BKE_id_remapper_free(IDRemapper *id_remapper)
{
blender::bke::id::remapper::IDRemapper *remapper = unwrap(id_remapper);
MEM_delete<blender::bke::id::remapper::IDRemapper>(remapper);
}
void BKE_id_remapper_clear(struct IDRemapper *id_remapper)
{
blender::bke::id::remapper::IDRemapper *remapper = unwrap(id_remapper);
remapper->clear();
}
bool BKE_id_remapper_is_empty(const struct IDRemapper *id_remapper)
{
const blender::bke::id::remapper::IDRemapper *remapper = unwrap(id_remapper);
return remapper->is_empty();
}
void BKE_id_remapper_add(IDRemapper *id_remapper, ID *old_id, ID *new_id)
{
blender::bke::id::remapper::IDRemapper *remapper = unwrap(id_remapper);
remapper->add(old_id, new_id);
}
bool BKE_id_remapper_has_mapping_for(const struct IDRemapper *id_remapper, uint64_t type_filter)
{
const blender::bke::id::remapper::IDRemapper *remapper = unwrap(id_remapper);
return remapper->contains_mappings_for_any(type_filter);
}
IDRemapperApplyResult BKE_id_remapper_get_mapping_result(const struct IDRemapper *id_remapper,
struct ID *id,
IDRemapperApplyOptions options,
const struct ID *id_self)
{
const blender::bke::id::remapper::IDRemapper *remapper = unwrap(id_remapper);
return remapper->get_mapping_result(id, options, id_self);
}
IDRemapperApplyResult BKE_id_remapper_apply_ex(const IDRemapper *id_remapper,
ID **r_id_ptr,
const IDRemapperApplyOptions options,
ID *id_self)
{
BLI_assert_msg((options & ID_REMAP_APPLY_UNMAP_WHEN_REMAPPING_TO_SELF) == 0 ||
id_self != nullptr,
"ID_REMAP_APPLY_WHEN_REMAPPING_TO_SELF requires id_self parameter.");
const blender::bke::id::remapper::IDRemapper *remapper = unwrap(id_remapper);
return remapper->apply(r_id_ptr, options, id_self);
}
IDRemapperApplyResult BKE_id_remapper_apply(const IDRemapper *id_remapper,
ID **r_id_ptr,
const IDRemapperApplyOptions options)
{
BLI_assert_msg((options & ID_REMAP_APPLY_UNMAP_WHEN_REMAPPING_TO_SELF) == 0,
"ID_REMAP_APPLY_UNMAP_WHEN_REMAPPING_TO_SELF requires id_self parameter. Use "
"`BKE_id_remapper_apply_ex`.");
return BKE_id_remapper_apply_ex(id_remapper, r_id_ptr, options, nullptr);
}
void BKE_id_remapper_iter(const struct IDRemapper *id_remapper,
IDRemapperIterFunction func,
void *user_data)
{
const blender::bke::id::remapper::IDRemapper *remapper = unwrap(id_remapper);
remapper->iter(func, user_data);
}
const char *BKE_id_remapper_result_string(const IDRemapperApplyResult result)
{
switch (result) {
case ID_REMAP_RESULT_SOURCE_NOT_MAPPABLE:
return "not_mappable";
case ID_REMAP_RESULT_SOURCE_UNAVAILABLE:
return "unavailable";
case ID_REMAP_RESULT_SOURCE_UNASSIGNED:
return "unassigned";
case ID_REMAP_RESULT_SOURCE_REMAPPED:
return "remapped";
default:
BLI_assert_unreachable();
}
return "";
}
static void id_remapper_print_item_cb(ID *old_id, ID *new_id, void * /*user_data*/)
{
if (old_id != nullptr && new_id != nullptr) {
printf("Remap %s(%p) to %s(%p)\n", old_id->name, old_id, new_id->name, new_id);
}
if (old_id != nullptr && new_id == nullptr) {
printf("Unassign %s(%p)\n", old_id->name, old_id);
}
}
void BKE_id_remapper_print(const struct IDRemapper *id_remapper)
{
BKE_id_remapper_iter(id_remapper, id_remapper_print_item_cb, nullptr);
}
}
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