context.c

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/*
 * 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.
 */
 
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
 
#include "MEM_guardedalloc.h"
 
#include "DNA_collection_types.h"
#include "DNA_gpencil_types.h"
#include "DNA_linestyle_types.h"
#include "DNA_object_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_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;
    bool py_init;
    void *py_context;
    void *py_context_orig;
  } data;
};
 
/* context */
 
bContext *CTX_create(void)
{
  bContext *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, const PointerRNA *ptr)
{
  /* ensure we have a context to put the entry in, if it was already used
   * we have to copy the context to ensure */
  bContextStore *ctx = contexts->last;
 
  if (!ctx || ctx->used) {
    if (ctx) {
      bContextStore *lastctx = ctx;
      ctx = MEM_dupallocN(lastctx);
      BLI_duplicatelist(&ctx->entries, &lastctx->entries);
    }
    else {
      ctx = MEM_callocN(sizeof(bContextStore), "bContextStore");
    }
 
    BLI_addtail(contexts, ctx);
  }
 
  bContextStoreEntry *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)
{
  /* ensure we have a context to put the entries in, if it was already used
   * we have to copy the context to ensure */
  bContextStore *ctx = contexts->last;
 
  if (!ctx || ctx->used) {
    if (ctx) {
      bContextStore *lastctx = ctx;
      ctx = MEM_dupallocN(lastctx);
      BLI_duplicatelist(&ctx->entries, &lastctx->entries);
    }
    else {
      ctx = MEM_callocN(sizeof(bContextStore), "bContextStore");
    }
 
    BLI_addtail(contexts, ctx);
  }
 
  LISTBASE_FOREACH (bContextStoreEntry *, tentry, &context->entries) {
    bContextStoreEntry *entry = MEM_dupallocN(tentry);
    BLI_addtail(&ctx->entries, entry);
  }
 
  return ctx;
}
 
bContextStore *CTX_store_get(bContext *C)
{
  return C->wm.store;
}
 
void CTX_store_set(bContext *C, bContextStore *store)
{
  C->wm.store = store;
}
 
bContextStore *CTX_store_copy(bContextStore *store)
{
  bContextStore *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? */
 
bool CTX_py_init_get(bContext *C)
{
  return C->data.py_init;
}
void CTX_py_init_set(bContext *C, bool value)
{
  C->data.py_init = value;
}
 
void *CTX_py_dict_get(const bContext *C)
{
  return C->data.py_context;
}
void *CTX_py_dict_get_orig(const bContext *C)
{
  return C->data.py_context_orig;
}
 
void CTX_py_state_push(bContext *C, struct bContext_PyState *pystate, void *value)
{
  pystate->py_context = C->data.py_context;
  pystate->py_context_orig = C->data.py_context_orig;
 
  C->data.py_context = value;
  C->data.py_context_orig = value;
}
void CTX_py_state_pop(bContext *C, struct bContext_PyState *pystate)
{
  C->data.py_context = pystate->py_context;
  C->data.py_context_orig = pystate->py_context_orig;
}
 
/* 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;
      }
 
      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 eContextResult ctx_data_get(bContext *C, const char *member, bContextDataResult *result)
{
  bScreen *screen;
  ScrArea *area;
  ARegion *region;
  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) {
    C->data.recursion = 1;
 
    bContextStoreEntry *entry = BLI_rfindstring(
        &C->wm.store->entries, member, offsetof(bContextStoreEntry, name));
 
    if (entry) {
      result->ptr = entry->ptr;
      done = 1;
    }
  }
  if (done != 1 && recursion < 2 && (region = CTX_wm_region(C))) {
    C->data.recursion = 2;
    if (region->type && region->type->context) {
      ret = region->type->context(C, member, result);
      if (ret) {
        done = -(-ret | -done);
      }
    }
  }
  if (done != 1 && recursion < 3 && (area = CTX_wm_area(C))) {
    C->data.recursion = 3;
    if (area->type && area->type->context) {
      ret = area->type->context(C, member, result);
      if (ret) {
        done = -(-ret | -done);
      }
    }
  }
 
  if (done != 1 && recursion < 4 && (screen = CTX_wm_screen(C))) {
    bContextDataCallback cb = screen->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) == CTX_RESULT_OK) {
    BLI_assert(result.type == CTX_DATA_TYPE_POINTER);
    return result.ptr.data;
  }
 
  return NULL;
}
 
static int ctx_data_pointer_verify(const bContext *C, const char *member, void **pointer)
{
  /* if context is NULL, pointer must be NULL too and that is a valid return */
  if (C == NULL) {
    *pointer = NULL;
    return 1;
  }
 
  bContextDataResult result;
  if (ctx_data_get((bContext *)C, member, &result) == CTX_RESULT_OK) {
    BLI_assert(result.type == CTX_DATA_TYPE_POINTER);
    *pointer = result.ptr.data;
    return 1;
  }
 
  *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) == CTX_RESULT_OK) {
    BLI_assert(result.type == CTX_DATA_TYPE_COLLECTION);
    *list = result.list;
    return 1;
  }
 
  BLI_listbase_clear(list);
 
  return 0;
}
 
static int ctx_data_base_collection_get(const bContext *C, const char *member, ListBase *list)
{
  ListBase ctx_object_list;
  if ((ctx_data_collection_get(C, member, &ctx_object_list) == false) ||
      BLI_listbase_is_empty(&ctx_object_list)) {
    BLI_listbase_clear(list);
    return 0;
  }
 
  bContextDataResult result;
  memset(&result, 0, sizeof(bContextDataResult));
 
  Scene *scene = CTX_data_scene(C);
  ViewLayer *view_layer = CTX_data_view_layer(C);
 
  bool ok = false;
 
  CollectionPointerLink *ctx_object;
  for (ctx_object = ctx_object_list.first; ctx_object; ctx_object = ctx_object->next) {
    Object *ob = ctx_object->ptr.data;
    Base *base = BKE_view_layer_base_find(view_layer, ob);
    if (base != NULL) {
      CTX_data_list_add(&result, &scene->id, &RNA_ObjectBase, base);
      ok = true;
    }
  }
  CTX_data_type_set(&result, CTX_DATA_TYPE_COLLECTION);
  BLI_freelistN(&ctx_object_list);
 
  *list = result.list;
  return ok;
}
 
PointerRNA CTX_data_pointer_get(const bContext *C, const char *member)
{
  bContextDataResult result;
  if (ctx_data_get((bContext *)C, member, &result) == CTX_RESULT_OK) {
    BLI_assert(result.type == CTX_DATA_TYPE_POINTER);
    return result.ptr;
  }
 
  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;
    }
 
    CLOG_WARN(&LOG,
              "member '%s' is '%s', not '%s'",
              member,
              RNA_struct_identifier(ptr.type),
              RNA_struct_identifier(type));
  }
 
  return PointerRNA_NULL;
}
 
PointerRNA CTX_data_pointer_get_type_silent(const bContext *C, const char *member, StructRNA *type)
{
  PointerRNA ptr = CTX_data_pointer_get(C, member);
 
  if (ptr.data && RNA_struct_is_a(ptr.type, type)) {
    return ptr;
  }
 
  return PointerRNA_NULL;
}
 
ListBase CTX_data_collection_get(const bContext *C, const char *member)
{
  bContextDataResult result;
  if (ctx_data_get((bContext *)C, member, &result) == CTX_RESULT_OK) {
    BLI_assert(result.type == CTX_DATA_TYPE_COLLECTION);
    return result.list;
  }
 
  ListBase list = {NULL, NULL};
  return list;
}
 
int /*eContextResult*/ CTX_data_get(
    const bContext *C, const char *member, PointerRNA *r_ptr, ListBase *r_lb, short *r_type)
{
  bContextDataResult result;
  eContextResult ret = ctx_data_get((bContext *)C, member, &result);
 
  if (ret == CTX_RESULT_OK) {
    *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);
}
 
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 *screen;
  ScrArea *area;
  ARegion *region;
  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 ((region = CTX_wm_region(C)) && region->type && region->type->context) {
    memset(&result, 0, sizeof(result));
    region->type->context(C, "", &result);
 
    if (result.dir) {
      for (a = 0; result.dir[a]; a++) {
        data_dir_add(&lb, result.dir[a], use_all);
      }
    }
  }
  if ((area = CTX_wm_area(C)) && area->type && area->type->context) {
    memset(&result, 0, sizeof(result));
    area->type->context(C, "", &result);
 
    if (result.dir) {
      for (a = 0; result.dir[a]; a++) {
        data_dir_add(&lb, result.dir[a], use_all);
      }
    }
  }
  if ((screen = CTX_wm_screen(C)) && screen->context) {
    bContextDataCallback cb = screen->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 = 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 = 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;
  }
 
  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;
}
 
bool CTX_wm_interface_locked(const bContext *C)
{
  return (bool)C->wm.manager->is_interface_locked;
}
 
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 *area = CTX_wm_area(C);
  return (area) ? area->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 *region = CTX_wm_region(C);
  return (region) ? region->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 *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_VIEW3D) {
    return area->spacedata.first;
  }
  return NULL;
}
 
RegionView3D *CTX_wm_region_view3d(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  ARegion *region = CTX_wm_region(C);
 
  if (area && area->spacetype == SPACE_VIEW3D) {
    if (region && region->regiontype == RGN_TYPE_WINDOW) {
      return region->regiondata;
    }
  }
  return NULL;
}
 
struct SpaceText *CTX_wm_space_text(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_TEXT) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceConsole *CTX_wm_space_console(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_CONSOLE) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceImage *CTX_wm_space_image(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_IMAGE) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceProperties *CTX_wm_space_properties(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_PROPERTIES) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceFile *CTX_wm_space_file(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_FILE) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceSeq *CTX_wm_space_seq(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_SEQ) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceOutliner *CTX_wm_space_outliner(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_OUTLINER) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceNla *CTX_wm_space_nla(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_NLA) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceNode *CTX_wm_space_node(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_NODE) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceGraph *CTX_wm_space_graph(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_GRAPH) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceAction *CTX_wm_space_action(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_ACTION) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceInfo *CTX_wm_space_info(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_INFO) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceUserPref *CTX_wm_space_userpref(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_USERPREF) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceClip *CTX_wm_space_clip(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_CLIP) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceTopBar *CTX_wm_space_topbar(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_TOPBAR) {
    return area->spacedata.first;
  }
  return NULL;
}
 
struct SpaceSpreadsheet *CTX_wm_space_spreadsheet(const bContext *C)
{
  ScrArea *area = CTX_wm_area(C);
  if (area && area->spacetype == SPACE_SPREADSHEET) {
    return area->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;
}
 
#ifdef WITH_PYTHON
#  define PYCTX_REGION_MEMBERS "region", "region_data"
#  define PYCTX_AREA_MEMBERS "area", "space_data", PYCTX_REGION_MEMBERS
#  define PYCTX_SCREEN_MEMBERS "screen", PYCTX_AREA_MEMBERS
#  define PYCTX_WINDOW_MEMBERS "window", "scene", "workspace", PYCTX_SCREEN_MEMBERS
#endif
 
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;
 
#ifdef WITH_PYTHON
  if (C->data.py_context != NULL) {
    BPY_context_dict_clear_members(C, PYCTX_WINDOW_MEMBERS);
  }
#endif
}
 
void CTX_wm_screen_set(bContext *C, bScreen *screen)
{
  C->wm.screen = screen;
  C->wm.area = NULL;
  C->wm.region = NULL;
 
#ifdef WITH_PYTHON
  if (C->data.py_context != NULL) {
    BPY_context_dict_clear_members(C, PYCTX_SCREEN_MEMBERS);
  }
#endif
}
 
void CTX_wm_area_set(bContext *C, ScrArea *area)
{
  C->wm.area = area;
  C->wm.region = NULL;
 
#ifdef WITH_PYTHON
  if (C->data.py_context != NULL) {
    BPY_context_dict_clear_members(C, PYCTX_AREA_MEMBERS);
  }
#endif
}
 
void CTX_wm_region_set(bContext *C, ARegion *region)
{
  C->wm.region = region;
 
#ifdef WITH_PYTHON
  if (C->data.py_context != NULL) {
    BPY_context_dict_clear_members(C, PYCTX_REGION_MEMBERS);
  }
#endif
}
 
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;
  }
 
  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;
  }
 
  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);
}
 
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 scene->master_collection;
}
 
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;
      }
      if (object_mode & OB_MODE_SCULPT) {
        return CTX_MODE_SCULPT;
      }
      if (object_mode & OB_MODE_WEIGHT_PAINT) {
        return CTX_MODE_PAINT_WEIGHT;
      }
      if (object_mode & OB_MODE_VERTEX_PAINT) {
        return CTX_MODE_PAINT_VERTEX;
      }
      if (object_mode & OB_MODE_TEXTURE_PAINT) {
        return CTX_MODE_PAINT_TEXTURE;
      }
      if (object_mode & OB_MODE_PARTICLE_EDIT) {
        return CTX_MODE_PARTICLE;
      }
      if (object_mode & OB_MODE_PAINT_GPENCIL) {
        return CTX_MODE_PAINT_GPENCIL;
      }
      if (object_mode & OB_MODE_EDIT_GPENCIL) {
        return CTX_MODE_EDIT_GPENCIL;
      }
      if (object_mode & OB_MODE_SCULPT_GPENCIL) {
        return CTX_MODE_SCULPT_GPENCIL;
      }
      if (object_mode & OB_MODE_WEIGHT_GPENCIL) {
        return CTX_MODE_WEIGHT_GPENCIL;
      }
      if (object_mode & OB_MODE_VERTEX_GPENCIL) {
        return CTX_MODE_VERTEX_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", "greasepencil_vertex", 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;
 
#ifdef WITH_PYTHON
  if (C->data.py_context != NULL) {
    BPY_context_dict_clear_members(C, "scene");
  }
#endif
}
 
ToolSettings *CTX_data_tool_settings(const bContext *C)
{
  Scene *scene = CTX_data_scene(C);
 
  if (scene) {
    return scene->toolsettings;
  }
 
  return NULL;
}
 
int CTX_data_selected_ids(const bContext *C, ListBase *list)
{
  return ctx_data_collection_get(C, "selected_ids", list);
}
 
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_base_collection_get(C, "selected_editable_objects", 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_base_collection_get(C, "editable_objects", 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_base_collection_get(C, "selected_objects", 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_base_collection_get(C, "visible_objects", 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_base_collection_get(C, "selectable_objects", 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)
{
  Object *ob = ctx_data_pointer_get(C, "active_object");
 
  if (ob == NULL) {
    return NULL;
  }
 
  ViewLayer *view_layer = CTX_data_view_layer(C);
  return BKE_view_layer_base_find(view_layer, ob);
}
 
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_pointer(const bContext *C)
{
  Main *bmain = CTX_data_main(C);
  Scene *scene = CTX_data_scene(C);
  ViewLayer *view_layer = CTX_data_view_layer(C);
  Depsgraph *depsgraph = BKE_scene_ensure_depsgraph(bmain, scene, view_layer);
  /* Dependency graph might have been just allocated, and hence it will not be marked.
   * This confuses redo system due to the lack of flushing changes back to the original data.
   * In the future we would need to check whether the CTX_wm_window(C)  is in editing mode (as an
   * opposite of playback-preview-only) and set active flag based on that. */
  DEG_make_active(depsgraph);
  return depsgraph;
}
 
Depsgraph *CTX_data_expect_evaluated_depsgraph(const bContext *C)
{
  Depsgraph *depsgraph = CTX_data_depsgraph_pointer(C);
  /* TODO(sergey): Assert that the dependency graph is fully evaluated.
   * Note that first the depsgraph and scene post-eval hooks needs to run extra round of updates
   * first to make check here really reliable. */
  return depsgraph;
}
 
Depsgraph *CTX_data_ensure_evaluated_depsgraph(const bContext *C)
{
  Depsgraph *depsgraph = CTX_data_depsgraph_pointer(C);
  Main *bmain = CTX_data_main(C);
  BKE_scene_graph_evaluated_ensure(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);
}