test2/source/blender/blenkernel/intern/context.c

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

/** \file
 * \ingroup bke
 */

#include <string.h>
#include <stdlib.h>
#include <stddef.h>

#include "MEM_guardedalloc.h"

#include "DNA_collection_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_space_types.h"
#include "DNA_view3d_types.h"
#include "DNA_windowmanager_types.h"
#include "DNA_object_types.h"
#include "DNA_linestyle_types.h"
#include "DNA_gpencil_types.h"
#include "DNA_workspace_types.h"

#include "DEG_depsgraph.h"

#include "BLI_listbase.h"
#include "BLI_string.h"
#include "BLI_threads.h"
#include "BLI_utildefines.h"

#include "BLT_translation.h"

#include "BKE_context.h"
#include "BKE_layer.h"
#include "BKE_main.h"
#include "BKE_scene.h"
#include "BKE_screen.h"
#include "BKE_sound.h"
#include "BKE_workspace.h"

#include "RE_engine.h"

#include "RNA_access.h"

#include "CLG_log.h"

#ifdef WITH_PYTHON
#  include "BPY_extern.h"
#endif

static CLG_LogRef LOG = {"bke.context"};

/* struct */

struct bContext {
  int thread;

  /* windowmanager context */
  struct {
    struct wmWindowManager *manager;
    struct wmWindow *window;
    struct WorkSpace *workspace;
    struct bScreen *screen;
    struct ScrArea *area;
    struct ARegion *region;
    struct ARegion *menu;
    struct wmGizmoGroup *gizmo_group;
    struct bContextStore *store;
    const char *operator_poll_msg; /* reason for poll failing */
  } wm;

  /* data context */
  struct {
    struct Main *main;
    struct Scene *scene;

    int recursion;
    int py_init; /* true if python is initialized */
    void *py_context;
  } data;
};

/* context */

bContext *CTX_create(void)
{
  bContext *C;

  C = MEM_callocN(sizeof(bContext), "bContext");

  return C;
}

bContext *CTX_copy(const bContext *C)
{
  bContext *newC = MEM_dupallocN((void *)C);

  return newC;
}

void CTX_free(bContext *C)
{
  MEM_freeN(C);
}

/* store */

bContextStore *CTX_store_add(ListBase *contexts, const char *name, PointerRNA *ptr)
{
  bContextStoreEntry *entry;
  bContextStore *ctx, *lastctx;

  /* ensure we have a context to put the entry in, if it was already used
   * we have to copy the context to ensure */
  ctx = contexts->last;

  if (!ctx || ctx->used) {
    if (ctx) {
      lastctx = ctx;
      ctx = MEM_dupallocN(lastctx);
      BLI_duplicatelist(&ctx->entries, &lastctx->entries);
    }
    else {
      ctx = MEM_callocN(sizeof(bContextStore), "bContextStore");
    }

    BLI_addtail(contexts, ctx);
  }

  entry = MEM_callocN(sizeof(bContextStoreEntry), "bContextStoreEntry");
  BLI_strncpy(entry->name, name, sizeof(entry->name));
  entry->ptr = *ptr;

  BLI_addtail(&ctx->entries, entry);

  return ctx;
}

bContextStore *CTX_store_add_all(ListBase *contexts, bContextStore *context)
{
  bContextStoreEntry *entry, *tentry;
  bContextStore *ctx, *lastctx;

  /* ensure we have a context to put the entries in, if it was already used
   * we have to copy the context to ensure */
  ctx = contexts->last;

  if (!ctx || ctx->used) {
    if (ctx) {
      lastctx = ctx;
      ctx = MEM_dupallocN(lastctx);
      BLI_duplicatelist(&ctx->entries, &lastctx->entries);
    }
    else {
      ctx = MEM_callocN(sizeof(bContextStore), "bContextStore");
    }

    BLI_addtail(contexts, ctx);
  }

  for (tentry = context->entries.first; tentry; tentry = tentry->next) {
    entry = MEM_dupallocN(tentry);
    BLI_addtail(&ctx->entries, entry);
  }

  return ctx;
}

void CTX_store_set(bContext *C, bContextStore *store)
{
  C->wm.store = store;
}

bContextStore *CTX_store_copy(bContextStore *store)
{
  bContextStore *ctx;

  ctx = MEM_dupallocN(store);
  BLI_duplicatelist(&ctx->entries, &store->entries);

  return ctx;
}

void CTX_store_free(bContextStore *store)
{
  BLI_freelistN(&store->entries);
  MEM_freeN(store);
}

void CTX_store_free_list(ListBase *contexts)
{
  bContextStore *ctx;

  while ((ctx = BLI_pophead(contexts))) {
    CTX_store_free(ctx);
  }
}

/* is python initialized? */

int CTX_py_init_get(bContext *C)
{
  return C->data.py_init;
}
void CTX_py_init_set(bContext *C, int value)
{
  C->data.py_init = value;
}

void *CTX_py_dict_get(const bContext *C)
{
  return C->data.py_context;
}
void CTX_py_dict_set(bContext *C, void *value)
{
  C->data.py_context = value;
}

/* data context utility functions */

struct bContextDataResult {
  PointerRNA ptr;
  ListBase list;
  const char **dir;
  short type; /* 0: normal, 1: seq */
};

static void *ctx_wm_python_context_get(const bContext *C,
                                       const char *member,
                                       const StructRNA *member_type,
                                       void *fall_through)
{
#ifdef WITH_PYTHON
  if (UNLIKELY(C && CTX_py_dict_get(C))) {
    bContextDataResult result;
    memset(&result, 0, sizeof(bContextDataResult));
    BPY_context_member_get((bContext *)C, member, &result);

    if (result.ptr.data) {
      if (RNA_struct_is_a(result.ptr.type, member_type)) {
        return result.ptr.data;
      }
      else {
        CLOG_WARN(&LOG,
                  "PyContext '%s' is a '%s', expected a '%s'",
                  member,
                  RNA_struct_identifier(result.ptr.type),
                  RNA_struct_identifier(member_type));
      }
    }
  }
#else
  UNUSED_VARS(C, member, member_type);
#endif

  /* don't allow UI context access from non-main threads */
  if (!BLI_thread_is_main()) {
    return NULL;
  }

  return fall_through;
}

static int ctx_data_get(bContext *C, const char *member, bContextDataResult *result)
{
  bScreen *sc;
  ScrArea *sa;
  ARegion *ar;
  int done = 0, recursion = C->data.recursion;
  int ret = 0;

  memset(result, 0, sizeof(bContextDataResult));
#ifdef WITH_PYTHON
  if (CTX_py_dict_get(C)) {
    if (BPY_context_member_get(C, member, result)) {
      return 1;
    }
  }
#endif

  /* don't allow UI context access from non-main threads */
  if (!BLI_thread_is_main()) {
    return done;
  }

  /* we check recursion to ensure that we do not get infinite
   * loops requesting data from ourselves in a context callback */

  /* Ok, this looks evil...
   * if (ret) done = -(-ret | -done);
   *
   * Values in order of importance
   * (0, -1, 1) - Where 1 is highest priority
   * */
  if (done != 1 && recursion < 1 && C->wm.store) {
    bContextStoreEntry *entry;

    C->data.recursion = 1;

    entry = BLI_rfindstring(&C->wm.store->entries, member, offsetof(bContextStoreEntry, name));
    if (entry) {
      result->ptr = entry->ptr;
      done = 1;
    }
  }
  if (done != 1 && recursion < 2 && (ar = CTX_wm_region(C))) {
    C->data.recursion = 2;
    if (ar->type && ar->type->context) {
      ret = ar->type->context(C, member, result);
      if (ret) {
        done = -(-ret | -done);
      }
    }
  }
  if (done != 1 && recursion < 3 && (sa = CTX_wm_area(C))) {
    C->data.recursion = 3;
    if (sa->type && sa->type->context) {
      ret = sa->type->context(C, member, result);
      if (ret) {
        done = -(-ret | -done);
      }
    }
  }
  if (done != 1 && recursion < 4 && (sc = CTX_wm_screen(C))) {
    bContextDataCallback cb = sc->context;
    C->data.recursion = 4;
    if (cb) {
      ret = cb(C, member, result);
      if (ret) {
        done = -(-ret | -done);
      }
    }
  }

  C->data.recursion = recursion;

  return done;
}

static void *ctx_data_pointer_get(const bContext *C, const char *member)
{
  bContextDataResult result;

  if (C && ctx_data_get((bContext *)C, member, &result) == 1) {
    BLI_assert(result.type == CTX_DATA_TYPE_POINTER);
    return result.ptr.data;
  }
  else {
    return NULL;
  }
}

static int ctx_data_pointer_verify(const bContext *C, const char *member, void **pointer)
{
  bContextDataResult result;

  /* if context is NULL, pointer must be NULL too and that is a valid return */
  if (C == NULL) {
    *pointer = NULL;
    return 1;
  }
  else if (ctx_data_get((bContext *)C, member, &result) == 1) {
    BLI_assert(result.type == CTX_DATA_TYPE_POINTER);
    *pointer = result.ptr.data;
    return 1;
  }
  else {
    *pointer = NULL;
    return 0;
  }
}

static int ctx_data_collection_get(const bContext *C, const char *member, ListBase *list)
{
  bContextDataResult result;

  if (ctx_data_get((bContext *)C, member, &result) == 1) {
    BLI_assert(result.type == CTX_DATA_TYPE_COLLECTION);
    *list = result.list;
    return 1;
  }

  BLI_listbase_clear(list);

  return 0;
}

PointerRNA CTX_data_pointer_get(const bContext *C, const char *member)
{
  bContextDataResult result;

  if (ctx_data_get((bContext *)C, member, &result) == 1) {
    BLI_assert(result.type == CTX_DATA_TYPE_POINTER);
    return result.ptr;
  }
  else {
    return PointerRNA_NULL;
  }
}

PointerRNA CTX_data_pointer_get_type(const bContext *C, const char *member, StructRNA *type)
{
  PointerRNA ptr = CTX_data_pointer_get(C, member);

  if (ptr.data) {
    if (RNA_struct_is_a(ptr.type, type)) {
      return ptr;
    }
    else {
      CLOG_WARN(&LOG,
                "member '%s' is '%s', not '%s'",
                member,
                RNA_struct_identifier(ptr.type),
                RNA_struct_identifier(type));
    }
  }

  return PointerRNA_NULL;
}

ListBase CTX_data_collection_get(const bContext *C, const char *member)
{
  bContextDataResult result;

  if (ctx_data_get((bContext *)C, member, &result) == 1) {
    BLI_assert(result.type == CTX_DATA_TYPE_COLLECTION);
    return result.list;
  }
  else {
    ListBase list = {NULL, NULL};
    return list;
  }
}

/* 1:found,  -1:found but not set,  0:not found */
int CTX_data_get(
    const bContext *C, const char *member, PointerRNA *r_ptr, ListBase *r_lb, short *r_type)
{
  bContextDataResult result;
  int ret = ctx_data_get((bContext *)C, member, &result);

  if (ret == 1) {
    *r_ptr = result.ptr;
    *r_lb = result.list;
    *r_type = result.type;
  }
  else {
    memset(r_ptr, 0, sizeof(*r_ptr));
    memset(r_lb, 0, sizeof(*r_lb));
    *r_type = 0;
  }

  return ret;
}

static void data_dir_add(ListBase *lb, const char *member, const bool use_all)
{
  LinkData *link;

  if ((use_all == false) && STREQ(member, "scene")) { /* exception */
    return;
  }

  if (BLI_findstring(lb, member, offsetof(LinkData, data))) {
    return;
  }

  link = MEM_callocN(sizeof(LinkData), "LinkData");
  link->data = (void *)member;
  BLI_addtail(lb, link);
}

/**
 * \param C: Context
 * \param use_store: Use 'C->wm.store'
 * \param use_rna: Use Include the properties from 'RNA_Context'
 * \param use_all: Don't skip values (currently only "scene")
 */
ListBase CTX_data_dir_get_ex(const bContext *C,
                             const bool use_store,
                             const bool use_rna,
                             const bool use_all)
{
  bContextDataResult result;
  ListBase lb;
  bScreen *sc;
  ScrArea *sa;
  ARegion *ar;
  int a;

  memset(&lb, 0, sizeof(lb));

  if (use_rna) {
    char name[256], *nameptr;
    int namelen;

    PropertyRNA *iterprop;
    PointerRNA ctx_ptr;
    RNA_pointer_create(NULL, &RNA_Context, (void *)C, &ctx_ptr);

    iterprop = RNA_struct_iterator_property(ctx_ptr.type);

    RNA_PROP_BEGIN (&ctx_ptr, itemptr, iterprop) {
      nameptr = RNA_struct_name_get_alloc(&itemptr, name, sizeof(name), &namelen);
      data_dir_add(&lb, name, use_all);
      if (nameptr) {
        if (name != nameptr) {
          MEM_freeN(nameptr);
        }
      }
    }
    RNA_PROP_END;
  }
  if (use_store && C->wm.store) {
    bContextStoreEntry *entry;

    for (entry = C->wm.store->entries.first; entry; entry = entry->next) {
      data_dir_add(&lb, entry->name, use_all);
    }
  }
  if ((ar = CTX_wm_region(C)) && ar->type && ar->type->context) {
    memset(&result, 0, sizeof(result));
    ar->type->context(C, "", &result);

    if (result.dir) {
      for (a = 0; result.dir[a]; a++) {
        data_dir_add(&lb, result.dir[a], use_all);
      }
    }
  }
  if ((sa = CTX_wm_area(C)) && sa->type && sa->type->context) {
    memset(&result, 0, sizeof(result));
    sa->type->context(C, "", &result);

    if (result.dir) {
      for (a = 0; result.dir[a]; a++) {
        data_dir_add(&lb, result.dir[a], use_all);
      }
    }
  }
  if ((sc = CTX_wm_screen(C)) && sc->context) {
    bContextDataCallback cb = sc->context;
    memset(&result, 0, sizeof(result));
    cb(C, "", &result);

    if (result.dir) {
      for (a = 0; result.dir[a]; a++) {
        data_dir_add(&lb, result.dir[a], use_all);
      }
    }
  }

  return lb;
}

ListBase CTX_data_dir_get(const bContext *C)
{
  return CTX_data_dir_get_ex(C, true, false, false);
}

bool CTX_data_equals(const char *member, const char *str)
{
  return (STREQ(member, str));
}

bool CTX_data_dir(const char *member)
{
  return member[0] == '\0';
}

void CTX_data_id_pointer_set(bContextDataResult *result, ID *id)
{
  RNA_id_pointer_create(id, &result->ptr);
}

void CTX_data_pointer_set(bContextDataResult *result, ID *id, StructRNA *type, void *data)
{
  RNA_pointer_create(id, type, data, &result->ptr);
}

void CTX_data_id_list_add(bContextDataResult *result, ID *id)
{
  CollectionPointerLink *link;

  link = MEM_callocN(sizeof(CollectionPointerLink), "CTX_data_id_list_add");
  RNA_id_pointer_create(id, &link->ptr);

  BLI_addtail(&result->list, link);
}

void CTX_data_list_add(bContextDataResult *result, ID *id, StructRNA *type, void *data)
{
  CollectionPointerLink *link;

  link = MEM_callocN(sizeof(CollectionPointerLink), "CTX_data_list_add");
  RNA_pointer_create(id, type, data, &link->ptr);

  BLI_addtail(&result->list, link);
}

int ctx_data_list_count(const bContext *C, int (*func)(const bContext *, ListBase *))
{
  ListBase list;

  if (func(C, &list)) {
    int tot = BLI_listbase_count(&list);
    BLI_freelistN(&list);
    return tot;
  }
  else {
    return 0;
  }
}

void CTX_data_dir_set(bContextDataResult *result, const char **dir)
{
  result->dir = dir;
}

void CTX_data_type_set(bContextDataResult *result, short type)
{
  result->type = type;
}

short CTX_data_type_get(bContextDataResult *result)
{
  return result->type;
}

/* window manager context */

wmWindowManager *CTX_wm_manager(const bContext *C)
{
  return C->wm.manager;
}

wmWindow *CTX_wm_window(const bContext *C)
{
  return ctx_wm_python_context_get(C, "window", &RNA_Window, C->wm.window);
}

WorkSpace *CTX_wm_workspace(const bContext *C)
{
  return ctx_wm_python_context_get(C, "workspace", &RNA_WorkSpace, C->wm.workspace);
}

bScreen *CTX_wm_screen(const bContext *C)
{
  return ctx_wm_python_context_get(C, "screen", &RNA_Screen, C->wm.screen);
}

ScrArea *CTX_wm_area(const bContext *C)
{
  return ctx_wm_python_context_get(C, "area", &RNA_Area, C->wm.area);
}

SpaceLink *CTX_wm_space_data(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  return (sa) ? sa->spacedata.first : NULL;
}

ARegion *CTX_wm_region(const bContext *C)
{
  return ctx_wm_python_context_get(C, "region", &RNA_Region, C->wm.region);
}

void *CTX_wm_region_data(const bContext *C)
{
  ARegion *ar = CTX_wm_region(C);
  return (ar) ? ar->regiondata : NULL;
}

struct ARegion *CTX_wm_menu(const bContext *C)
{
  return C->wm.menu;
}

struct wmGizmoGroup *CTX_wm_gizmo_group(const bContext *C)
{
  return C->wm.gizmo_group;
}

struct wmMsgBus *CTX_wm_message_bus(const bContext *C)
{
  return C->wm.manager ? C->wm.manager->message_bus : NULL;
}

struct ReportList *CTX_wm_reports(const bContext *C)
{
  if (C->wm.manager) {
    return &(C->wm.manager->reports);
  }

  return NULL;
}

View3D *CTX_wm_view3d(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_VIEW3D) {
    return sa->spacedata.first;
  }
  return NULL;
}

RegionView3D *CTX_wm_region_view3d(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  ARegion *ar = CTX_wm_region(C);

  if (sa && sa->spacetype == SPACE_VIEW3D) {
    if (ar) {
      return ar->regiondata;
    }
  }
  return NULL;
}

struct SpaceText *CTX_wm_space_text(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_TEXT) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceConsole *CTX_wm_space_console(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_CONSOLE) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceImage *CTX_wm_space_image(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_IMAGE) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceProperties *CTX_wm_space_properties(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_PROPERTIES) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceFile *CTX_wm_space_file(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_FILE) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceSeq *CTX_wm_space_seq(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_SEQ) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceOutliner *CTX_wm_space_outliner(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_OUTLINER) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceNla *CTX_wm_space_nla(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_NLA) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceNode *CTX_wm_space_node(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_NODE) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceGraph *CTX_wm_space_graph(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_GRAPH) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceAction *CTX_wm_space_action(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_ACTION) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceInfo *CTX_wm_space_info(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_INFO) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceUserPref *CTX_wm_space_userpref(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_USERPREF) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceClip *CTX_wm_space_clip(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_CLIP) {
    return sa->spacedata.first;
  }
  return NULL;
}

struct SpaceTopBar *CTX_wm_space_topbar(const bContext *C)
{
  ScrArea *sa = CTX_wm_area(C);
  if (sa && sa->spacetype == SPACE_TOPBAR) {
    return sa->spacedata.first;
  }
  return NULL;
}

void CTX_wm_manager_set(bContext *C, wmWindowManager *wm)
{
  C->wm.manager = wm;
  C->wm.window = NULL;
  C->wm.screen = NULL;
  C->wm.area = NULL;
  C->wm.region = NULL;
}

void CTX_wm_window_set(bContext *C, wmWindow *win)
{
  C->wm.window = win;
  if (win) {
    C->data.scene = win->scene;
  }
  C->wm.workspace = (win) ? BKE_workspace_active_get(win->workspace_hook) : NULL;
  C->wm.screen = (win) ? BKE_workspace_active_screen_get(win->workspace_hook) : NULL;
  C->wm.area = NULL;
  C->wm.region = NULL;
}

void CTX_wm_screen_set(bContext *C, bScreen *screen)
{
  C->wm.screen = screen;
  C->wm.area = NULL;
  C->wm.region = NULL;
}

void CTX_wm_area_set(bContext *C, ScrArea *area)
{
  C->wm.area = area;
  C->wm.region = NULL;
}

void CTX_wm_region_set(bContext *C, ARegion *region)
{
  C->wm.region = region;
}

void CTX_wm_menu_set(bContext *C, ARegion *menu)
{
  C->wm.menu = menu;
}

void CTX_wm_gizmo_group_set(bContext *C, struct wmGizmoGroup *gzgroup)
{
  C->wm.gizmo_group = gzgroup;
}

void CTX_wm_operator_poll_msg_set(bContext *C, const char *msg)
{
  C->wm.operator_poll_msg = msg;
}

const char *CTX_wm_operator_poll_msg_get(bContext *C)
{
  return IFACE_(C->wm.operator_poll_msg);
}

/* data context */

Main *CTX_data_main(const bContext *C)
{
  Main *bmain;

  if (ctx_data_pointer_verify(C, "blend_data", (void *)&bmain)) {
    return bmain;
  }
  else {
    return C->data.main;
  }
}

void CTX_data_main_set(bContext *C, Main *bmain)
{
  C->data.main = bmain;
  BKE_sound_init_main(bmain);
}

Scene *CTX_data_scene(const bContext *C)
{
  Scene *scene;

  if (ctx_data_pointer_verify(C, "scene", (void *)&scene)) {
    return scene;
  }
  else {
    return C->data.scene;
  }
}

ViewLayer *CTX_data_view_layer(const bContext *C)
{
  ViewLayer *view_layer;

  if (ctx_data_pointer_verify(C, "view_layer", (void *)&view_layer)) {
    return view_layer;
  }

  wmWindow *win = CTX_wm_window(C);
  Scene *scene = CTX_data_scene(C);
  if (win) {
    view_layer = BKE_view_layer_find(scene, win->view_layer_name);
    if (view_layer) {
      return view_layer;
    }
  }

  return BKE_view_layer_default_view(scene);
}

RenderEngineType *CTX_data_engine_type(const bContext *C)
{
  Scene *scene = CTX_data_scene(C);
  return RE_engines_find(scene->r.engine);
}

/**
 * This is tricky. Sometimes the user overrides the render_layer
 * but not the scene_collection. In this case what to do?
 *
 * If the scene_collection is linked to the ViewLayer we use it.
 * Otherwise we fallback to the active one of the ViewLayer.
 */
LayerCollection *CTX_data_layer_collection(const bContext *C)
{
  ViewLayer *view_layer = CTX_data_view_layer(C);
  LayerCollection *layer_collection;

  if (ctx_data_pointer_verify(C, "layer_collection", (void *)&layer_collection)) {
    if (BKE_view_layer_has_collection(view_layer, layer_collection->collection)) {
      return layer_collection;
    }
  }

  /* fallback */
  return BKE_layer_collection_get_active(view_layer);
}

Collection *CTX_data_collection(const bContext *C)
{
  Collection *collection;
  if (ctx_data_pointer_verify(C, "collection", (void *)&collection)) {
    return collection;
  }

  LayerCollection *layer_collection = CTX_data_layer_collection(C);
  if (layer_collection) {
    return layer_collection->collection;
  }

  /* fallback */
  Scene *scene = CTX_data_scene(C);
  return BKE_collection_master(scene);
}

enum eContextObjectMode CTX_data_mode_enum_ex(const Object *obedit,
                                              const Object *ob,
                                              const eObjectMode object_mode)
{
  // Object *obedit = CTX_data_edit_object(C);
  if (obedit) {
    switch (obedit->type) {
      case OB_MESH:
        return CTX_MODE_EDIT_MESH;
      case OB_CURVE:
        return CTX_MODE_EDIT_CURVE;
      case OB_SURF:
        return CTX_MODE_EDIT_SURFACE;
      case OB_FONT:
        return CTX_MODE_EDIT_TEXT;
      case OB_ARMATURE:
        return CTX_MODE_EDIT_ARMATURE;
      case OB_MBALL:
        return CTX_MODE_EDIT_METABALL;
      case OB_LATTICE:
        return CTX_MODE_EDIT_LATTICE;
    }
  }
  else {
    // Object *ob = CTX_data_active_object(C);
    if (ob) {
      if (object_mode & OB_MODE_POSE) {
        return CTX_MODE_POSE;
      }
      else if (object_mode & OB_MODE_SCULPT) {
        return CTX_MODE_SCULPT;
      }
      else if (object_mode & OB_MODE_WEIGHT_PAINT) {
        return CTX_MODE_PAINT_WEIGHT;
      }
      else if (object_mode & OB_MODE_VERTEX_PAINT) {
        return CTX_MODE_PAINT_VERTEX;
      }
      else if (object_mode & OB_MODE_TEXTURE_PAINT) {
        return CTX_MODE_PAINT_TEXTURE;
      }
      else if (object_mode & OB_MODE_PARTICLE_EDIT) {
        return CTX_MODE_PARTICLE;
      }
      else if (object_mode & OB_MODE_PAINT_GPENCIL) {
        return CTX_MODE_PAINT_GPENCIL;
      }
      else if (object_mode & OB_MODE_EDIT_GPENCIL) {
        return CTX_MODE_EDIT_GPENCIL;
      }
      else if (object_mode & OB_MODE_SCULPT_GPENCIL) {
        return CTX_MODE_SCULPT_GPENCIL;
      }
      else if (object_mode & OB_MODE_WEIGHT_GPENCIL) {
        return CTX_MODE_WEIGHT_GPENCIL;
      }
    }
  }

  return CTX_MODE_OBJECT;
}

enum eContextObjectMode CTX_data_mode_enum(const bContext *C)
{
  Object *obedit = CTX_data_edit_object(C);
  Object *obact = obedit ? NULL : CTX_data_active_object(C);
  return CTX_data_mode_enum_ex(obedit, obact, obact ? obact->mode : OB_MODE_OBJECT);
}

/* would prefer if we can use the enum version below over this one - Campbell */
/* must be aligned with above enum  */
static const char *data_mode_strings[] = {
    "mesh_edit",
    "curve_edit",
    "surface_edit",
    "text_edit",
    "armature_edit",
    "mball_edit",
    "lattice_edit",
    "posemode",
    "sculpt_mode",
    "weightpaint",
    "vertexpaint",
    "imagepaint",
    "particlemode",
    "objectmode",
    "greasepencil_paint",
    "greasepencil_edit",
    "greasepencil_sculpt",
    "greasepencil_weight",
    NULL,
};
BLI_STATIC_ASSERT(ARRAY_SIZE(data_mode_strings) == CTX_MODE_NUM + 1,
                  "Must have a string for each context mode")
const char *CTX_data_mode_string(const bContext *C)
{
  return data_mode_strings[CTX_data_mode_enum(C)];
}

void CTX_data_scene_set(bContext *C, Scene *scene)
{
  C->data.scene = scene;
}

ToolSettings *CTX_data_tool_settings(const bContext *C)
{
  Scene *scene = CTX_data_scene(C);

  if (scene) {
    return scene->toolsettings;
  }
  else {
    return NULL;
  }
}

int CTX_data_selected_nodes(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selected_nodes", list);
}

int CTX_data_selected_editable_objects(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selected_editable_objects", list);
}

int CTX_data_selected_editable_bases(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selected_editable_bases", list);
}

int CTX_data_editable_objects(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "editable_objects", list);
}

int CTX_data_editable_bases(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "editable_bases", list);
}

int CTX_data_selected_objects(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selected_objects", list);
}

int CTX_data_selected_bases(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selected_bases", list);
}

int CTX_data_visible_objects(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "visible_objects", list);
}

int CTX_data_visible_bases(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "visible_bases", list);
}

int CTX_data_selectable_objects(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selectable_objects", list);
}

int CTX_data_selectable_bases(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selectable_bases", list);
}

struct Object *CTX_data_active_object(const bContext *C)
{
  return ctx_data_pointer_get(C, "active_object");
}

struct Base *CTX_data_active_base(const bContext *C)
{
  return ctx_data_pointer_get(C, "active_base");
}

struct Object *CTX_data_edit_object(const bContext *C)
{
  return ctx_data_pointer_get(C, "edit_object");
}

struct Image *CTX_data_edit_image(const bContext *C)
{
  return ctx_data_pointer_get(C, "edit_image");
}

struct Text *CTX_data_edit_text(const bContext *C)
{
  return ctx_data_pointer_get(C, "edit_text");
}

struct MovieClip *CTX_data_edit_movieclip(const bContext *C)
{
  return ctx_data_pointer_get(C, "edit_movieclip");
}

struct Mask *CTX_data_edit_mask(const bContext *C)
{
  return ctx_data_pointer_get(C, "edit_mask");
}

struct EditBone *CTX_data_active_bone(const bContext *C)
{
  return ctx_data_pointer_get(C, "active_bone");
}

struct CacheFile *CTX_data_edit_cachefile(const bContext *C)
{
  return ctx_data_pointer_get(C, "edit_cachefile");
}

int CTX_data_selected_bones(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selected_bones", list);
}

int CTX_data_selected_editable_bones(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selected_editable_bones", list);
}

int CTX_data_visible_bones(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "visible_bones", list);
}

int CTX_data_editable_bones(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "editable_bones", list);
}

struct bPoseChannel *CTX_data_active_pose_bone(const bContext *C)
{
  return ctx_data_pointer_get(C, "active_pose_bone");
}

int CTX_data_selected_pose_bones(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selected_pose_bones", list);
}

int CTX_data_selected_pose_bones_from_active_object(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selected_pose_bones_from_active_object", list);
}

int CTX_data_visible_pose_bones(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "visible_pose_bones", list);
}

bGPdata *CTX_data_gpencil_data(const bContext *C)
{
  return ctx_data_pointer_get(C, "gpencil_data");
}

bGPDlayer *CTX_data_active_gpencil_layer(const bContext *C)
{
  return ctx_data_pointer_get(C, "active_gpencil_layer");
}

bGPDframe *CTX_data_active_gpencil_frame(const bContext *C)
{
  return ctx_data_pointer_get(C, "active_gpencil_frame");
}

int CTX_data_visible_gpencil_layers(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "visible_gpencil_layers", list);
}

int CTX_data_editable_gpencil_layers(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "editable_gpencil_layers", list);
}

int CTX_data_editable_gpencil_strokes(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "editable_gpencil_strokes", list);
}

Depsgraph *CTX_data_depsgraph(const bContext *C)
{
  Scene *scene = CTX_data_scene(C);
  ViewLayer *view_layer = CTX_data_view_layer(C);
  return BKE_scene_get_depsgraph(scene, view_layer, true);
}

Depsgraph *CTX_data_evaluated_depsgraph(const bContext *C)
{
  Depsgraph *depsgraph = CTX_data_depsgraph(C);
  Main *bmain = CTX_data_main(C);
  BKE_scene_graph_update_tagged(depsgraph, bmain);
  return depsgraph;
}

Depsgraph *CTX_data_depsgraph_on_load(const bContext *C)
{
  Scene *scene = CTX_data_scene(C);
  ViewLayer *view_layer = CTX_data_view_layer(C);
  return BKE_scene_get_depsgraph(scene, view_layer, false);
}