UI_interface_c.hh

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/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#pragma once
 
#include <functional>
#include <optional>
#include <string>
 
#include "BLI_compiler_attrs.h"
#include "BLI_string_ref.hh"
#include "BLI_string_utf8_symbols.h"
#include "BLI_sys_types.h" /* size_t */
#include "BLI_utildefines.h"
#include "UI_interface_icons.hh"
#include "WM_types.hh"
 
#include "MEM_guardedalloc.h"
 
/* Struct Declarations */
 
struct ARegion;
struct AutoComplete;
struct EnumPropertyItem;
struct FileSelectParams;
struct ID;
struct IDProperty;
struct ImBuf;
struct Image;
struct ImageUser;
struct ListBase;
struct MTex;
struct Panel;
struct PanelType;
struct PanelCategoryDyn;
struct PanelCategoryStack;
struct PointerRNA;
struct PropertyRNA;
struct ReportList;
struct ResultBLF;
struct bContext;
struct bContextStore;
struct bNode;
struct bNodeSocket;
struct bNodeTree;
struct bScreen;
struct MenuType;
struct rctf;
struct rcti;
struct uiButSearch;
struct uiFontStyle;
struct uiList;
struct uiStyle;
struct uiWidgetColors;
struct wmDrag;
struct wmDropBox;
struct wmEvent;
struct wmGizmo;
struct wmKeyConfig;
struct wmKeyMap;
struct wmKeyMapItem;
struct wmMsgBus;
struct wmOperator;
struct wmOperatorType;
struct wmRegionListenerParams;
struct wmWindow;
namespace blender::ed::asset {
struct AssetFilterSettings;
}
namespace blender::ui {
class AbstractView;
class AbstractViewItem;
}  // namespace blender::ui
 
struct uiBlock;
struct uiBut;
struct uiButExtraOpIcon;
struct uiLayout;
struct uiPopupBlockHandle;
struct uiTooltipData;
 
/* Defines */

#define UI_SEP_CHAR '|'
#define UI_SEP_CHAR_S "|"

#define UI_VALUE_INDETERMINATE_CHAR BLI_STR_UTF8_EM_DASH

#define UI_MENU_ARROW_SEP BLI_STR_UTF8_BLACK_RIGHT_POINTING_SMALL_TRIANGLE
 
/* names */
#define UI_MAX_DRAW_STR 400
#define UI_MAX_NAME_STR 128
#define UI_MAX_SHORTCUT_STR 64

#define UI_REGION_OVERLAP_MARGIN (U.widget_unit / 3)

#define UI_SCREEN_MARGIN 10

enum eUIEmbossType {
  UI_EMBOSS = 0,
  UI_EMBOSS_NONE = 1,
  UI_EMBOSS_PULLDOWN = 2,
  UI_EMBOSS_PIE_MENU = 3,
  UI_EMBOSS_NONE_OR_STATUS = 4,
  UI_EMBOSS_UNDEFINED = 255,
};

enum {
  UI_DIR_UP = 1 << 0,
  UI_DIR_DOWN = 1 << 1,
  UI_DIR_LEFT = 1 << 2,
  UI_DIR_RIGHT = 1 << 3,
  UI_DIR_CENTER_X = 1 << 4,
  UI_DIR_CENTER_Y = 1 << 5,
 
  UI_DIR_ALL = UI_DIR_UP | UI_DIR_DOWN | UI_DIR_LEFT | UI_DIR_RIGHT,
};

enum {
  UI_BLOCK_LOOP = 1 << 0,
  UI_BLOCK_NUMSELECT = 1 << 1,
  UI_BLOCK_NO_WIN_CLIP = 1 << 2,
  UI_BLOCK_CLIPBOTTOM = 1 << 3,
  UI_BLOCK_CLIPTOP = 1 << 4,
  UI_BLOCK_MOVEMOUSE_QUIT = 1 << 5,
  UI_BLOCK_KEEP_OPEN = 1 << 6,
  UI_BLOCK_POPUP = 1 << 7,
  UI_BLOCK_OUT_1 = 1 << 8,
  UI_BLOCK_SEARCH_MENU = 1 << 9,
  UI_BLOCK_POPUP_MEMORY = 1 << 10,
  UI_BLOCK_CLIP_EVENTS = 1 << 11,
 
  /* #uiBlock::flags bits 14-17 are identical to #uiBut::drawflag bits. */
 
  UI_BLOCK_POPUP_HOLD = 1 << 18,
  UI_BLOCK_LIST_ITEM = 1 << 19,
  UI_BLOCK_PIE_MENU = 1 << 20,
  UI_BLOCK_POPOVER = 1 << 21,
  UI_BLOCK_POPOVER_ONCE = 1 << 22,
  UI_BLOCK_SHOW_SHORTCUT_ALWAYS = 1 << 23,
  UI_BLOCK_NO_DRAW_OVERRIDDEN_STATE = 1 << 24,
  UI_BLOCK_SEARCH_ONLY = 1 << 25,
  UI_BLOCK_QUICK_SETUP = 1 << 26,
  UI_BLOCK_NO_ACCELERATOR_KEYS = 1 << 27,
};

enum {
  UI_RETURN_CANCEL = 1 << 0,
  UI_RETURN_OK = 1 << 1,
  UI_RETURN_OUT = 1 << 2,
  UI_RETURN_OUT_PARENT = 1 << 3,
  UI_RETURN_UPDATE = 1 << 4,
  UI_RETURN_POPUP_OK = 1 << 5,
};

enum {
  /* WARNING: the first 8 flags are internal (see #UI_SELECT definition). */
 
  UI_BUT_ICON_SUBMENU = 1 << 8,
  UI_BUT_ICON_PREVIEW = 1 << 9,
 
  UI_BUT_NODE_LINK = 1 << 10,
  UI_BUT_NODE_ACTIVE = 1 << 11,
  UI_BUT_DRAG_LOCK = 1 << 12,
  UI_BUT_DISABLED = 1 << 13,
 
  UI_BUT_ANIMATED = 1 << 14,
  UI_BUT_ANIMATED_KEY = 1 << 15,
  UI_BUT_DRIVEN = 1 << 16,
  UI_BUT_REDALERT = 1 << 17,
  UI_BUT_INACTIVE = 1 << 18,
  UI_BUT_LAST_ACTIVE = 1 << 19,
  UI_BUT_UNDO = 1 << 20,
  /* UNUSED = 1 << 21, */
  UI_BUT_NO_UTF8 = 1 << 22,

  UI_BUT_ACTIVE_DEFAULT = 1 << 23,

  UI_BUT_LIST_ITEM = 1 << 24,
  UI_BUT_DRAG_MULTI = 1 << 25,
  UI_BUT_ACTIVATE_ON_INIT = 1 << 26,

  UI_BUT_HAS_SEP_CHAR = 1 << 27,
  UI_BUT_UPDATE_DELAY = 1 << 28,
  UI_BUT_TEXTEDIT_UPDATE = 1 << 29,
  UI_BUT_VALUE_CLEAR = 1 << 30,

  UI_BUT_OVERRIDDEN = 1u << 31u,
};
 
enum {
  UI_BUT2_ACTIVATE_ON_INIT_NO_SELECT = 1 << 0,
  UI_BUT2_FORCE_SEMI_MODAL_ACTIVE = 1 << 1,
};

enum {
  UI_BUT_DRAG_FULL_BUT = (1 << 0),
 
  /* --- Internal flags. --- */
  UI_BUT_DRAGPOIN_FREE = (1 << 1),
};

#define UI_DEFAULT_TEXT_POINTS 11.0f

#define UI_DEFAULT_TITLE_POINTS 11.0f

#define UI_DEFAULT_TOOLTIP_POINTS 11.0f
 
#define UI_PANEL_WIDTH 340
#define UI_COMPACT_PANEL_WIDTH 160
#define UI_SIDEBAR_PANEL_WIDTH 280
#define UI_NAVIGATION_REGION_WIDTH UI_COMPACT_PANEL_WIDTH
#define UI_NARROW_NAVIGATION_REGION_WIDTH 100

#define UI_TOOLBAR_COLUMN (1.25f * ICON_DEFAULT_HEIGHT_TOOLBAR)
#define UI_TOOLBAR_MARGIN (0.5f * ICON_DEFAULT_HEIGHT_TOOLBAR)
#define UI_TOOLBAR_WIDTH UI_TOOLBAR_MARGIN + UI_TOOLBAR_COLUMN
 
#define UI_PANEL_CATEGORY_MARGIN_WIDTH (U.widget_unit * 1.0f)
 
/* Both these margins should be ignored if the panel doesn't show a background (check
 * #UI_panel_should_show_background()). */
#define UI_PANEL_MARGIN_X (U.widget_unit * 0.4f)
#define UI_PANEL_MARGIN_Y (U.widget_unit * 0.1f)

enum {
  UI_BUT_TEXT_LEFT = 1 << 1,
  UI_BUT_ICON_LEFT = 1 << 2,
  UI_BUT_TEXT_RIGHT = 1 << 3,
  UI_BUT_NO_TOOLTIP = 1 << 4,
  UI_BUT_HAS_TOOLTIP_LABEL = 1 << 5,
  UI_BUT_NO_TEXT_PADDING = 1 << 6,
 
  /* Button align flag, for drawing groups together.
   * Used in 'uiBlock.flag', take care! */
  UI_BUT_ALIGN_TOP = 1 << 14,
  UI_BUT_ALIGN_LEFT = 1 << 15,
  UI_BUT_ALIGN_RIGHT = 1 << 16,
  UI_BUT_ALIGN_DOWN = 1 << 17,
  UI_BUT_ALIGN = UI_BUT_ALIGN_TOP | UI_BUT_ALIGN_LEFT | UI_BUT_ALIGN_RIGHT | UI_BUT_ALIGN_DOWN,
  /* end bits shared with 'uiBlock.flag' */

  UI_BUT_ALIGN_STITCH_TOP = 1 << 18,
  UI_BUT_ALIGN_STITCH_LEFT = 1 << 19,
  UI_BUT_ALIGN_ALL = UI_BUT_ALIGN | UI_BUT_ALIGN_STITCH_TOP | UI_BUT_ALIGN_STITCH_LEFT,

  UI_BUT_BOX_ITEM = 1 << 20,

  UI_BUT_HOVER_LEFT = 1 << 21,
  UI_BUT_HOVER_RIGHT = 1 << 22,

  UI_BUT_ICON_REVERSE = 1 << 23,

  UI_BUT_ANIMATED_CHANGED = 1 << 24,

  UI_BUT_CHECKBOX_INVERT = 1 << 25,

  UI_BUT_INDETERMINATE = 1 << 26,

  UI_BUT_ICON_INVERT = 1 << 27,
};

enum eButPointerType {
  UI_BUT_POIN_NONE = 0,
 
  UI_BUT_POIN_CHAR = 32,
  UI_BUT_POIN_SHORT = 64,
  UI_BUT_POIN_INT = 96,
  UI_BUT_POIN_FLOAT = 128,
  // UI_BUT_POIN_FUNCTION = 192, /* UNUSED */
  UI_BUT_POIN_BIT = 256, /* OR'd with a bit index. */
};

#define UI_BUT_POIN_TYPES (UI_BUT_POIN_FLOAT | UI_BUT_POIN_SHORT | UI_BUT_POIN_CHAR)

enum eButType {
  UI_BTYPE_BUT = 1 << 9,
  UI_BTYPE_ROW = 2 << 9,
  UI_BTYPE_TEXT = 3 << 9,
  UI_BTYPE_MENU = 4 << 9,
  UI_BTYPE_BUT_MENU = 5 << 9,
  UI_BTYPE_NUM = 6 << 9,
  UI_BTYPE_NUM_SLIDER = 7 << 9,
  UI_BTYPE_TOGGLE = 8 << 9,
  UI_BTYPE_TOGGLE_N = 9 << 9,
  UI_BTYPE_ICON_TOGGLE = 10 << 9,
  UI_BTYPE_ICON_TOGGLE_N = 11 << 9,
  UI_BTYPE_BUT_TOGGLE = 12 << 9,
  UI_BTYPE_CHECKBOX = 13 << 9,
  UI_BTYPE_CHECKBOX_N = 14 << 9,
  UI_BTYPE_COLOR = 15 << 9,
  UI_BTYPE_TAB = 16 << 9,
  UI_BTYPE_POPOVER = 17 << 9,
  UI_BTYPE_SCROLL = 18 << 9,
  UI_BTYPE_BLOCK = 19 << 9,
  UI_BTYPE_LABEL = 20 << 9,
  UI_BTYPE_KEY_EVENT = 24 << 9,
  UI_BTYPE_HSVCUBE = 26 << 9,
  UI_BTYPE_PULLDOWN = 27 << 9,
  UI_BTYPE_ROUNDBOX = 28 << 9,
  UI_BTYPE_COLORBAND = 30 << 9,
  UI_BTYPE_UNITVEC = 31 << 9,
  UI_BTYPE_CURVE = 32 << 9,
  UI_BTYPE_CURVEPROFILE = 33 << 9,
  UI_BTYPE_LISTBOX = 36 << 9,
  UI_BTYPE_LISTROW = 37 << 9,
  UI_BTYPE_HSVCIRCLE = 38 << 9,
  UI_BTYPE_TRACK_PREVIEW = 40 << 9,

  UI_BTYPE_SEARCH_MENU = 41 << 9,
  UI_BTYPE_EXTRA = 42 << 9,
  UI_BTYPE_PREVIEW_TILE = 43 << 9,
  UI_BTYPE_HOTKEY_EVENT = 46 << 9,
  UI_BTYPE_IMAGE = 47 << 9,
  UI_BTYPE_HISTOGRAM = 48 << 9,
  UI_BTYPE_WAVEFORM = 49 << 9,
  UI_BTYPE_VECTORSCOPE = 50 << 9,
  UI_BTYPE_PROGRESS = 51 << 9,
  UI_BTYPE_NODE_SOCKET = 53 << 9,
  UI_BTYPE_SEPR = 54 << 9,
  UI_BTYPE_SEPR_LINE = 55 << 9,
  UI_BTYPE_SEPR_SPACER = 56 << 9,
  UI_BTYPE_GRIP = 57 << 9,
  UI_BTYPE_DECORATOR = 58 << 9,
  UI_BTYPE_VIEW_ITEM = 59 << 9,
};
 
#define BUTTYPE (63 << 9)

enum eButGradientType {
  UI_GRAD_NONE = -1,
  UI_GRAD_SV = 0,
  UI_GRAD_HV = 1,
  UI_GRAD_HS = 2,
  UI_GRAD_H = 3,
  UI_GRAD_S = 4,
  UI_GRAD_V = 5,
 
  UI_GRAD_V_ALT = 9,
  UI_GRAD_L_ALT = 10,
};
 
/* Drawing
 *
 * Functions to draw various shapes, taking theme settings into account.
 * Used for code that draws its own UI style elements. */
 
void UI_draw_roundbox_corner_set(int type);
void UI_draw_roundbox_aa(const rctf *rect, bool filled, float rad, const float color[4]);
void UI_draw_roundbox_4fv(const rctf *rect, bool filled, float rad, const float col[4]);
void UI_draw_roundbox_3ub_alpha(
    const rctf *rect, bool filled, float rad, const unsigned char col[3], unsigned char alpha);
void UI_draw_roundbox_3fv_alpha(
    const rctf *rect, bool filled, float rad, const float col[3], float alpha);
void UI_draw_roundbox_4fv_ex(const rctf *rect,
                             const float inner1[4],
                             const float inner2[4],
                             float shade_dir,
                             const float outline[4],
                             float outline_width,
                             float rad);
 
#if 0 /* unused */
int UI_draw_roundbox_corner_get();
#endif
 
void ui_draw_dropshadow(const rctf *rct, float radius, float width, float aspect, float alpha);
 
void UI_draw_text_underline(int pos_x, int pos_y, int len, int height, const float color[4]);

void UI_draw_safe_areas(uint pos,
                        const rctf *rect,
                        const float title_aspect[2],
                        const float action_aspect[2]);

enum {
  UI_SCROLL_PRESSED = 1 << 0,
  UI_SCROLL_ARROWS = 1 << 1,
};
void UI_draw_widget_scroll(uiWidgetColors *wcol, const rcti *rect, const rcti *slider, int state);

float UI_text_clip_middle_ex(const uiFontStyle *fstyle,
                             char *str,
                             float okwidth,
                             float minwidth,
                             size_t max_len,
                             char rpart_sep);

 
struct uiSearchItems;
 
using uiButHandleFunc = void (*)(bContext *C, void *arg1, void *arg2);
using uiButHandleRenameFunc = void (*)(bContext *C, void *arg, char *origstr);
using uiButHandleNFunc = void (*)(bContext *C, void *argN, void *arg2);
using uiButHandleHoldFunc = void (*)(bContext *C, ARegion *butregion, uiBut *but);
using uiButCompleteFunc = int (*)(bContext *C, char *str, void *arg);

using uiButArgNFree = void (*)(void *argN);
using uiButArgNCopy = void *(*)(const void *argN);

using uiButIdentityCompareFunc = bool (*)(const uiBut *a, const uiBut *b);
 
/* Search types. */
using uiButSearchCreateFn = ARegion *(*)(bContext *C, ARegion *butregion, uiButSearch *search_but);
using uiButSearchUpdateFn =
    void (*)(const bContext *C, void *arg, const char *str, uiSearchItems *items, bool is_first);
using uiButSearchContextMenuFn = bool (*)(bContext *C,
                                          void *arg,
                                          void *active,
                                          const wmEvent *event);
using uiButSearchTooltipFn =
    ARegion *(*)(bContext *C, ARegion *region, const rcti *item_rect, void *arg, void *active);
using uiButSearchListenFn = void (*)(const wmRegionListenerParams *params, void *arg);

using uiButToolTipFunc = std::string (*)(bContext *C, void *argN, const char *tip);
 
using uiButToolTipCustomFunc = void (*)(bContext &C, uiTooltipData &data, void *argN);
 
using uiBlockHandleFunc = void (*)(bContext *C, void *arg, int event);
 
/* -------------------------------------------------------------------- */
 
struct uiBlockInteraction_Params {
  bool is_click;
  int *unique_retval_ids;
  uint unique_retval_ids_len;
};

using uiBlockInteractionBeginFn = void *(*)(bContext *C,
                                            const uiBlockInteraction_Params *params,
                                            void *arg1);
using uiBlockInteractionEndFn = void (*)(bContext *C,
                                         const uiBlockInteraction_Params *params,
                                         void *arg1,
                                         void *user_data);
using uiBlockInteractionUpdateFn = void (*)(bContext *C,
                                            const uiBlockInteraction_Params *params,
                                            void *arg1,
                                            void *user_data);
 
struct uiBlockInteraction_CallbackData {
  uiBlockInteractionBeginFn begin_fn;
  uiBlockInteractionEndFn end_fn;
  uiBlockInteractionUpdateFn update_fn;
  void *arg1;
};
 
void UI_block_interaction_set(uiBlock *block, uiBlockInteraction_CallbackData *callbacks);

 
/* Menu Callbacks */
 
using uiMenuCreateFunc = void (*)(bContext *C, uiLayout *layout, void *arg1);
using uiMenuHandleFunc = void (*)(bContext *C, void *arg, int event);
using uiMenuStepFunc = bool (*)(bContext *C, int direction, void *arg1);
 
using uiCopyArgFunc = void *(*)(const void *arg);
using uiFreeArgFunc = void (*)(void *arg);
 
/* `interface_query.cc` */
 
bool UI_but_has_tooltip_label(const uiBut *but);
bool UI_but_is_tool(const uiBut *but);
/* file selectors are exempt from utf-8 checks */
bool UI_but_is_utf8(const uiBut *but);
#define UI_but_is_decorator(but) ((but)->type == UI_BTYPE_DECORATOR)
 
bool UI_block_is_empty_ex(const uiBlock *block, bool skip_title);
bool UI_block_is_empty(const uiBlock *block);
bool UI_block_can_add_separator(const uiBlock *block);
bool UI_block_has_active_default_button(const uiBlock *block);
 
uiList *UI_list_find_mouse_over(const ARegion *region, const wmEvent *event);
 
/* `interface_region_menu_popup.cc` */

struct uiPopupMenu;
 
uiPopupMenu *UI_popup_menu_begin(bContext *C, const char *title, int icon) ATTR_NONNULL();
uiPopupMenu *UI_popup_menu_begin_ex(bContext *C,
                                    const char *title,
                                    const char *block_name,
                                    int icon) ATTR_NONNULL();
void UI_popup_menu_end(bContext *C, uiPopupMenu *pup);
bool UI_popup_menu_end_or_cancel(bContext *C, uiPopupMenu *pup);
uiLayout *UI_popup_menu_layout(uiPopupMenu *pup);
 
void UI_popup_menu_reports(bContext *C, ReportList *reports) ATTR_NONNULL();
int UI_popup_menu_invoke(bContext *C, const char *idname, ReportList *reports) ATTR_NONNULL(1, 2);

void UI_popup_menu_close(const uiBlock *block, bool is_cancel = false);
void UI_popup_menu_close_from_but(const uiBut *but, bool is_cancel = false);

void UI_popup_menu_retval_set(const uiBlock *block, int retval, bool enable);
void UI_popup_dummy_panel_set(ARegion *region, uiBlock *block);
void UI_popup_menu_but_set(uiPopupMenu *pup, ARegion *butregion, uiBut *but);
 
/* `interface_region_popover.cc` */
 
struct uiPopover;
 
int UI_popover_panel_invoke(bContext *C, const char *idname, bool keep_open, ReportList *reports);

uiPopover *UI_popover_begin(bContext *C, int ui_menu_width, bool from_active_button)
    ATTR_NONNULL(1);
void UI_popover_end(bContext *C, uiPopover *pup, wmKeyMap *keymap);
uiLayout *UI_popover_layout(uiPopover *pup);
void UI_popover_once_clear(uiPopover *pup);
 
/* `interface_region_menu_pie.cc` */
 
/* Pie menus */
struct uiPieMenu;
 
int UI_pie_menu_invoke(bContext *C, const char *idname, const wmEvent *event);
int UI_pie_menu_invoke_from_operator_enum(bContext *C,
                                          const char *title,
                                          const char *opname,
                                          const char *propname,
                                          const wmEvent *event);
int UI_pie_menu_invoke_from_rna_enum(bContext *C,
                                     const char *title,
                                     const char *path,
                                     const wmEvent *event);
 
uiPieMenu *UI_pie_menu_begin(bContext *C, const char *title, int icon, const wmEvent *event)
    ATTR_NONNULL();
void UI_pie_menu_end(bContext *C, uiPieMenu *pie);
uiLayout *UI_pie_menu_layout(uiPieMenu *pie);
 
/* `interface_region_menu_popup.cc` */
 
/* Popup Blocks
 *
 * Functions used to create popup blocks. These are like popup menus
 * but allow using all button types and creating their own layout. */
using uiBlockCreateFunc = uiBlock *(*)(bContext *C, ARegion *region, void *arg1);
using uiBlockCancelFunc = void (*)(bContext *C, void *arg1);
 
void UI_popup_block_invoke(bContext *C, uiBlockCreateFunc func, void *arg, uiFreeArgFunc arg_free);
void UI_popup_block_invoke_ex(
    bContext *C, uiBlockCreateFunc func, void *arg, uiFreeArgFunc arg_free, bool can_refresh);
void UI_popup_block_ex(bContext *C,
                       uiBlockCreateFunc func,
                       uiBlockHandleFunc popup_func,
                       uiBlockCancelFunc cancel_func,
                       void *arg,
                       wmOperator *op);

bool UI_popup_block_template_confirm_is_supported(const uiBlock *block);
void UI_popup_block_template_confirm(uiBlock *block,
                                     bool cancel_default,
                                     blender::FunctionRef<uiBut *()> confirm_fn,
                                     blender::FunctionRef<uiBut *()> cancel_fn);
void UI_popup_block_template_confirm_op(uiLayout *layout,
                                        wmOperatorType *ot,
                                        const char *confirm_text,
                                        const char *cancel_text,
                                        const int icon,
                                        bool cancel_default,
                                        PointerRNA *r_ptr);
 
#if 0 /* UNUSED */
void uiPupBlockOperator(bContext *C,
                        uiBlockCreateFunc func,
                        wmOperator *op,
                        wmOperatorCallContext opcontext);
#endif
 
void UI_popup_block_close(bContext *C, wmWindow *win, uiBlock *block);
 
bool UI_popup_block_name_exists(const bScreen *screen, blender::StringRef name);
 
/* Blocks
 *
 * Functions for creating, drawing and freeing blocks. A Block is a
 * container of buttons and used for various purposes.
 *
 * Begin/Define Buttons/End/Draw is the typical order in which these
 * function should be called, though for popup blocks Draw is left out.
 * Freeing blocks is done by the screen/ module automatically.
 */
 
uiBlock *UI_block_begin(const bContext *C,
                        ARegion *region,
                        std::string name,
                        eUIEmbossType emboss);
void UI_block_end_ex(const bContext *C, uiBlock *block, const int xy[2], int r_xy[2]);
void UI_block_end(const bContext *C, uiBlock *block);
void UI_block_draw(const bContext *C, uiBlock *block);
void UI_blocklist_update_window_matrix(const bContext *C, const ListBase *lb);
void UI_blocklist_update_view_for_buttons(const bContext *C, const ListBase *lb);
void UI_blocklist_draw(const bContext *C, const ListBase *lb);
void UI_block_update_from_old(const bContext *C, uiBlock *block);
 
enum {
  UI_BLOCK_THEME_STYLE_REGULAR = 0,
  UI_BLOCK_THEME_STYLE_POPUP = 1,
};
void UI_block_theme_style_set(uiBlock *block, char theme_style);
eUIEmbossType UI_block_emboss_get(uiBlock *block);
void UI_block_emboss_set(uiBlock *block, eUIEmbossType emboss);
bool UI_block_is_search_only(const uiBlock *block);
void UI_block_set_search_only(uiBlock *block, bool search_only);

void UI_block_set_active_operator(uiBlock *block, wmOperator *op, const bool free);

void UI_block_free(const bContext *C, uiBlock *block);
 
void UI_block_listen(const uiBlock *block, const wmRegionListenerParams *listener_params);

void UI_blocklist_free(const bContext *C, ARegion *region);
void UI_blocklist_free_inactive(const bContext *C, ARegion *region);

void UI_screen_free_active_but_highlight(const bContext *C, bScreen *screen);
void UI_region_free_active_but_all(bContext *C, ARegion *region);
 
void UI_block_region_set(uiBlock *block, ARegion *region);
 
void UI_block_lock_set(uiBlock *block, bool val, const char *lockstr);
void UI_block_lock_clear(uiBlock *block);
 
#define UI_BUTTON_SECTION_MERGE_DISTANCE (UI_UNIT_X * 3)
/* Separator line between regions if the #uiButtonSectionsAlign is not #None. */
#define UI_BUTTON_SECTION_SEPERATOR_LINE_WITH (U.pixelsize * 2)
 
enum class uiButtonSectionsAlign : int8_t { None = 1, Top, Bottom };
void UI_region_button_sections_draw(const ARegion *region,
                                    int /*THemeColorID*/ colorid,
                                    uiButtonSectionsAlign align);
bool UI_region_button_sections_is_inside_x(const ARegion *region, const int mval_x);

void UI_block_align_begin(uiBlock *block);
void UI_block_align_end(uiBlock *block);

enum eBlockBoundsCalc {
  UI_BLOCK_BOUNDS_NONE = 0,
  UI_BLOCK_BOUNDS = 1,
  UI_BLOCK_BOUNDS_TEXT,
  UI_BLOCK_BOUNDS_POPUP_MOUSE,
  UI_BLOCK_BOUNDS_POPUP_MENU,
  UI_BLOCK_BOUNDS_POPUP_CENTER,
  UI_BLOCK_BOUNDS_PIE_CENTER,
};

void UI_block_bounds_set_normal(uiBlock *block, int addval);
void UI_block_bounds_set_text(uiBlock *block, int addval);
void UI_block_bounds_set_popup(uiBlock *block, int addval, const int bounds_offset[2]);
void UI_block_bounds_set_menu(uiBlock *block, int addval, const int bounds_offset[2]);
void UI_block_bounds_set_centered(uiBlock *block, int addval);
void UI_block_bounds_set_explicit(uiBlock *block, int minx, int miny, int maxx, int maxy);
 
int UI_blocklist_min_y_get(ListBase *lb);
 
void UI_block_direction_set(uiBlock *block, char direction);
void UI_block_flag_enable(uiBlock *block, int flag);
void UI_block_flag_disable(uiBlock *block, int flag);
void UI_block_translate(uiBlock *block, float x, float y);
 
int UI_but_return_value_get(uiBut *but);
 
uiBut *UI_but_active_drop_name_button(const bContext *C);
bool UI_but_active_drop_name(const bContext *C);
bool UI_but_active_drop_color(bContext *C);
 
void UI_but_flag_enable(uiBut *but, int flag);
void UI_but_flag_disable(uiBut *but, int flag);
bool UI_but_flag_is_set(uiBut *but, int flag);
void UI_but_flag2_enable(uiBut *but, int flag);
 
void UI_but_drawflag_enable(uiBut *but, int flag);
void UI_but_drawflag_disable(uiBut *but, int flag);
 
void UI_but_dragflag_enable(uiBut *but, int flag);
void UI_but_dragflag_disable(uiBut *but, int flag);
 
void UI_but_disable(uiBut *but, const char *disabled_hint);
 
void UI_but_type_set_menu_from_pulldown(uiBut *but);

void UI_but_color_set(uiBut *but, const uchar color[4]);

void UI_but_placeholder_set(uiBut *but, const char *placeholder_text) ATTR_NONNULL(1);

bool UI_but_active_only_ex(
    const bContext *C, ARegion *region, uiBlock *block, uiBut *but, bool remove_on_failure);
bool UI_but_active_only(const bContext *C, ARegion *region, uiBlock *block, uiBut *but);
bool UI_block_active_only_flagged_buttons(const bContext *C, ARegion *region, uiBlock *block);

void UI_but_execute(const bContext *C, ARegion *region, uiBut *but);
 
std::optional<std::string> UI_but_online_manual_id(const uiBut *but) ATTR_WARN_UNUSED_RESULT;
std::optional<std::string> UI_but_online_manual_id_from_active(const bContext *C)
    ATTR_WARN_UNUSED_RESULT;
bool UI_but_is_userdef(const uiBut *but);
 
/* Buttons
 *
 * Functions to define various types of buttons in a block. Postfixes:
 * - F: float
 * - I: int
 * - S: short
 * - C: char
 * - R: RNA
 * - O: operator */
 
uiBut *uiDefBut(uiBlock *block,
                int type,
                int retval,
                blender::StringRef str,
                int x,
                int y,
                short width,
                short height,
                void *poin,
                float min,
                float max,
                const char *tip);
uiBut *uiDefButF(uiBlock *block,
                 int type,
                 int retval,
                 blender::StringRef str,
                 int x,
                 int y,
                 short width,
                 short height,
                 float *poin,
                 float min,
                 float max,
                 const char *tip);
uiBut *uiDefButI(uiBlock *block,
                 int type,
                 int retval,
                 blender::StringRef str,
                 int x,
                 int y,
                 short width,
                 short height,
                 int *poin,
                 float min,
                 float max,
                 const char *tip);
uiBut *uiDefButBitI(uiBlock *block,
                    int type,
                    int bit,
                    int retval,
                    blender::StringRef str,
                    int x,
                    int y,
                    short width,
                    short height,
                    int *poin,
                    float min,
                    float max,
                    const char *tip);
uiBut *uiDefButS(uiBlock *block,
                 int type,
                 int retval,
                 blender::StringRef str,
                 int x,
                 int y,
                 short width,
                 short height,
                 short *poin,
                 float min,
                 float max,
                 const char *tip);
uiBut *uiDefButBitS(uiBlock *block,
                    int type,
                    int bit,
                    int retval,
                    blender::StringRef str,
                    int x,
                    int y,
                    short width,
                    short height,
                    short *poin,
                    float min,
                    float max,
                    const char *tip);
uiBut *uiDefButC(uiBlock *block,
                 int type,
                 int retval,
                 blender::StringRef str,
                 int x,
                 int y,
                 short width,
                 short height,
                 char *poin,
                 float min,
                 float max,
                 const char *tip);
uiBut *uiDefButBitC(uiBlock *block,
                    int type,
                    int bit,
                    int retval,
                    blender::StringRef str,
                    int x,
                    int y,
                    short width,
                    short height,
                    char *poin,
                    float min,
                    float max,
                    const char *tip);
uiBut *uiDefButR(uiBlock *block,
                 int type,
                 int retval,
                 const char *str,
                 int x,
                 int y,
                 short width,
                 short height,
                 PointerRNA *ptr,
                 const char *propname,
                 int index,
                 float min,
                 float max,
                 const char *tip);
uiBut *uiDefButR_prop(uiBlock *block,
                      int type,
                      int retval,
                      const char *str,
                      int x,
                      int y,
                      short width,
                      short height,
                      PointerRNA *ptr,
                      PropertyRNA *prop,
                      int index,
                      float min,
                      float max,
                      const char *tip);
uiBut *uiDefButO(uiBlock *block,
                 int type,
                 const char *opname,
                 wmOperatorCallContext opcontext,
                 const char *str,
                 int x,
                 int y,
                 short width,
                 short height,
                 const char *tip);
uiBut *uiDefButO_ptr(uiBlock *block,
                     int type,
                     wmOperatorType *ot,
                     wmOperatorCallContext opcontext,
                     blender::StringRef str,
                     int x,
                     int y,
                     short width,
                     short height,
                     const char *tip);
 
uiBut *uiDefIconBut(uiBlock *block,
                    int type,
                    int retval,
                    int icon,
                    int x,
                    int y,
                    short width,
                    short height,
                    void *poin,
                    float min,
                    float max,
                    const char *tip);
uiBut *uiDefIconButI(uiBlock *block,
                     int type,
                     int retval,
                     int icon,
                     int x,
                     int y,
                     short width,
                     short height,
                     int *poin,
                     float min,
                     float max,
                     const char *tip);
uiBut *uiDefIconButBitI(uiBlock *block,
                        int type,
                        int bit,
                        int retval,
                        int icon,
                        int x,
                        int y,
                        short width,
                        short height,
                        int *poin,
                        float min,
                        float max,
                        const char *tip);
uiBut *uiDefIconButS(uiBlock *block,
                     int type,
                     int retval,
                     int icon,
                     int x,
                     int y,
                     short width,
                     short height,
                     short *poin,
                     float min,
                     float max,
                     const char *tip);
uiBut *uiDefIconButBitS(uiBlock *block,
                        int type,
                        int bit,
                        int retval,
                        int icon,
                        int x,
                        int y,
                        short width,
                        short height,
                        short *poin,
                        float min,
                        float max,
                        const char *tip);
uiBut *uiDefIconButBitC(uiBlock *block,
                        int type,
                        int bit,
                        int retval,
                        int icon,
                        int x,
                        int y,
                        short width,
                        short height,
                        char *poin,
                        float min,
                        float max,
                        const char *tip);
uiBut *uiDefIconButR(uiBlock *block,
                     int type,
                     int retval,
                     int icon,
                     int x,
                     int y,
                     short width,
                     short height,
                     PointerRNA *ptr,
                     const char *propname,
                     int index,
                     float min,
                     float max,
                     const char *tip);
uiBut *uiDefIconButR_prop(uiBlock *block,
                          int type,
                          int retval,
                          int icon,
                          int x,
                          int y,
                          short width,
                          short height,
                          PointerRNA *ptr,
                          PropertyRNA *prop,
                          int index,
                          float min,
                          float max,
                          const char *tip);
uiBut *uiDefIconButO(uiBlock *block,
                     int type,
                     const char *opname,
                     wmOperatorCallContext opcontext,
                     int icon,
                     int x,
                     int y,
                     short width,
                     short height,
                     const char *tip);
uiBut *uiDefIconButO_ptr(uiBlock *block,
                         int type,
                         wmOperatorType *ot,
                         wmOperatorCallContext opcontext,
                         int icon,
                         int x,
                         int y,
                         short width,
                         short height,
                         const char *tip);
uiBut *uiDefButImage(
    uiBlock *block, void *imbuf, int x, int y, short width, short height, const uchar color[4]);
uiBut *uiDefButAlert(uiBlock *block, int icon, int x, int y, short width, short height);
uiBut *uiDefIconTextBut(uiBlock *block,
                        int type,
                        int retval,
                        int icon,
                        blender::StringRef str,
                        int x,
                        int y,
                        short width,
                        short height,
                        void *poin,
                        float min,
                        float max,
                        const char *tip);
uiBut *uiDefIconTextButI(uiBlock *block,
                         int type,
                         int retval,
                         int icon,
                         blender::StringRef str,
                         int x,
                         int y,
                         short width,
                         short height,
                         int *poin,
                         float min,
                         float max,
                         const char *tip);
uiBut *uiDefIconTextButR(uiBlock *block,
                         int type,
                         int retval,
                         int icon,
                         const char *str,
                         int x,
                         int y,
                         short width,
                         short height,
                         PointerRNA *ptr,
                         const char *propname,
                         int index,
                         float min,
                         float max,
                         const char *tip);
uiBut *uiDefIconTextButR_prop(uiBlock *block,
                              int type,
                              int retval,
                              int icon,
                              const char *str,
                              int x,
                              int y,
                              short width,
                              short height,
                              PointerRNA *ptr,
                              PropertyRNA *prop,
                              int index,
                              float min,
                              float max,
                              const char *tip);
uiBut *uiDefIconTextButO(uiBlock *block,
                         int type,
                         const char *opname,
                         wmOperatorCallContext opcontext,
                         int icon,
                         blender::StringRef str,
                         int x,
                         int y,
                         short width,
                         short height,
                         const char *tip);
uiBut *uiDefIconTextButO_ptr(uiBlock *block,
                             int type,
                             wmOperatorType *ot,
                             wmOperatorCallContext opcontext,
                             int icon,
                             blender::StringRef str,
                             int x,
                             int y,
                             short width,
                             short height,
                             const char *tip);
 
void UI_but_operator_set(uiBut *but,
                         wmOperatorType *optype,
                         wmOperatorCallContext opcontext,
                         const PointerRNA *opptr = nullptr);
void UI_but_operator_set_never_call(uiBut *but);

PointerRNA *UI_but_operator_ptr_ensure(uiBut *but);
 
void UI_but_context_ptr_set(uiBlock *block, uiBut *but, const char *name, const PointerRNA *ptr);
const PointerRNA *UI_but_context_ptr_get(const uiBut *but,
                                         const char *name,
                                         const StructRNA *type = nullptr);
std::optional<blender::StringRefNull> UI_but_context_string_get(const uiBut *but,
                                                                const char *name);
const bContextStore *UI_but_context_get(const uiBut *but);
 
void UI_but_unit_type_set(uiBut *but, int unit_type);
int UI_but_unit_type_get(const uiBut *but);
 
std::optional<EnumPropertyItem> UI_but_rna_enum_item_get(bContext &C, uiBut &but);
 
std::string UI_but_string_get_rna_property_identifier(const uiBut &but);
std::string UI_but_string_get_rna_struct_identifier(const uiBut &but);
std::string UI_but_string_get_label(uiBut &but);
std::string UI_but_context_menu_title_from_button(uiBut &but);
std::string UI_but_string_get_tooltip_label(const uiBut &but);
std::string UI_but_string_get_rna_label(uiBut &but);
std::string UI_but_string_get_rna_label_context(const uiBut &but);
std::string UI_but_string_get_tooltip(bContext &C, uiBut &but);
std::string UI_but_string_get_rna_tooltip(bContext &C, uiBut &but);
std::string UI_but_string_get_operator_keymap(bContext &C, uiBut &but);
std::string UI_but_string_get_property_keymap(bContext &C, uiBut &but);
 
std::string UI_but_extra_icon_string_get_label(const uiButExtraOpIcon &extra_icon);
std::string UI_but_extra_icon_string_get_tooltip(bContext &C, const uiButExtraOpIcon &extra_icon);
std::string UI_but_extra_icon_string_get_operator_keymap(const bContext &C,
                                                         const uiButExtraOpIcon &extra_icon);

enum {
  UI_ID_NOP = 0,
  UI_ID_RENAME = 1 << 0,
  UI_ID_BROWSE = 1 << 1,
  UI_ID_ADD_NEW = 1 << 2,
  UI_ID_ALONE = 1 << 4,
  UI_ID_OPEN = 1 << 3,
  UI_ID_DELETE = 1 << 5,
  UI_ID_LOCAL = 1 << 6,
  UI_ID_AUTO_NAME = 1 << 7,
  UI_ID_FAKE_USER = 1 << 8,
  UI_ID_PIN = 1 << 9,
  UI_ID_PREVIEWS = 1 << 10,
  UI_ID_OVERRIDE = 1 << 11,
  UI_ID_FULL = UI_ID_RENAME | UI_ID_BROWSE | UI_ID_ADD_NEW | UI_ID_OPEN | UI_ID_ALONE |
               UI_ID_DELETE | UI_ID_LOCAL,
};

enum {
  UI_TEMPLATE_ID_FILTER_ALL = 0,
  UI_TEMPLATE_ID_FILTER_AVAILABLE = 1,
};
 
enum eButProgressType {
  UI_BUT_PROGRESS_TYPE_BAR = 0,
  UI_BUT_PROGRESS_TYPE_RING = 1,
};
 
enum class LayoutSeparatorType : int8_t {
  Auto,
  Space,
  Line,
};
 
/***************************** ID Utilities *******************************/
 
int UI_icon_from_id(const ID *id);
int UI_icon_from_report_type(int type);
int UI_icon_colorid_from_report_type(int type);
int UI_text_colorid_from_report_type(int type);
 
int UI_icon_from_event_type(short event_type, short event_value);
int UI_icon_from_keymap_item(const wmKeyMapItem *kmi, int r_icon_mod[4]);
 
uiBut *uiDefMenuBut(uiBlock *block,
                    uiMenuCreateFunc func,
                    void *arg,
                    blender::StringRef str,
                    int x,
                    int y,
                    short width,
                    short height,
                    const char *tip);
uiBut *uiDefIconTextMenuBut(uiBlock *block,
                            uiMenuCreateFunc func,
                            void *arg,
                            int icon,
                            blender::StringRef str,
                            int x,
                            int y,
                            short width,
                            short height,
                            const char *tip);
uiBut *uiDefIconMenuBut(uiBlock *block,
                        uiMenuCreateFunc func,
                        void *arg,
                        int icon,
                        int x,
                        int y,
                        short width,
                        short height,
                        const char *tip);
 
uiBut *uiDefBlockBut(uiBlock *block,
                     uiBlockCreateFunc func,
                     void *arg,
                     blender::StringRef str,
                     int x,
                     int y,
                     short width,
                     short height,
                     const char *tip);
uiBut *uiDefBlockButN(uiBlock *block,
                      uiBlockCreateFunc func,
                      void *argN,
                      blender::StringRef str,
                      int x,
                      int y,
                      short width,
                      short height,
                      const char *tip,
                      uiButArgNFree func_argN_free_fn = MEM_freeN,
                      uiButArgNCopy func_argN_copy_fn = MEM_dupallocN);

uiBut *uiDefIconBlockBut(uiBlock *block,
                         uiBlockCreateFunc func,
                         void *arg,
                         int retval,
                         int icon,
                         int x,
                         int y,
                         short width,
                         short height,
                         const char *tip);

uiBut *uiDefSearchBut(uiBlock *block,
                      void *arg,
                      int retval,
                      int icon,
                      int maxncpy,
                      int x,
                      int y,
                      short width,
                      short height,
                      const char *tip);
uiBut *uiDefSearchButO_ptr(uiBlock *block,
                           wmOperatorType *ot,
                           IDProperty *properties,
                           void *arg,
                           int retval,
                           int icon,
                           int maxncpy,
                           int x,
                           int y,
                           short width,
                           short height,
                           const char *tip);

enum eButLabelAlign {
  UI_BUT_LABEL_ALIGN_NONE,
  UI_BUT_LABEL_ALIGN_COLUMN,
  UI_BUT_LABEL_ALIGN_SPLIT_COLUMN,
};

enum eAutoPropButsReturn {
  UI_PROP_BUTS_NONE_ADDED = 1 << 0,
  UI_PROP_BUTS_ANY_FAILED_CHECK = 1 << 1,
};
 
ENUM_OPERATORS(eAutoPropButsReturn, UI_PROP_BUTS_ANY_FAILED_CHECK);
 
uiBut *uiDefAutoButR(uiBlock *block,
                     PointerRNA *ptr,
                     PropertyRNA *prop,
                     int index,
                     const char *name,
                     int icon,
                     int x,
                     int y,
                     int width,
                     int height);
void uiDefAutoButsArrayR(uiBlock *block,
                         PointerRNA *ptr,
                         PropertyRNA *prop,
                         const int icon,
                         const int x,
                         const int y,
                         const int tot_width,
                         const int height);
eAutoPropButsReturn uiDefAutoButsRNA(uiLayout *layout,
                                     PointerRNA *ptr,
                                     bool (*check_prop)(PointerRNA *ptr,
                                                        PropertyRNA *prop,
                                                        void *user_data),
                                     void *user_data,
                                     PropertyRNA *prop_activate_init,
                                     eButLabelAlign label_align,
                                     bool compact);

void UI_but_func_identity_compare_set(uiBut *but, uiButIdentityCompareFunc cmp_fn);

bool UI_search_item_add(uiSearchItems *items,
                        const char *name,
                        void *poin,
                        int iconid,
                        int but_flag,
                        uint8_t name_prefix_offset);

void UI_but_func_search_set(uiBut *but,
                            uiButSearchCreateFn search_create_fn,
                            uiButSearchUpdateFn search_update_fn,
                            void *arg,
                            bool free_arg,
                            uiFreeArgFunc search_arg_free_fn,
                            uiButHandleFunc search_exec_fn,
                            void *active);
void UI_but_func_search_set_context_menu(uiBut *but, uiButSearchContextMenuFn context_menu_fn);
void UI_but_func_search_set_tooltip(uiBut *but, uiButSearchTooltipFn tooltip_fn);
void UI_but_func_search_set_listen(uiBut *but, uiButSearchListenFn listen_fn);
void UI_but_func_search_set_sep_string(uiBut *but, const char *search_sep_string);
void UI_but_func_search_set_results_are_suggestions(uiBut *but, bool value);

int UI_searchbox_size_y();
int UI_searchbox_size_x();
int UI_search_items_find_index(const uiSearchItems *items, const char *name);

void UI_but_hint_drawstr_set(uiBut *but, const char *string);
void UI_but_icon_indicator_number_set(uiBut *but, const int indicator_number);
void UI_but_icon_indicator_set(uiBut *but, const char *string);
void UI_but_icon_indicator_color_set(uiBut *but, const uchar color[4]);
 
void UI_but_node_link_set(uiBut *but, bNodeSocket *socket, const float draw_color[4]);
 
void UI_but_number_step_size_set(uiBut *but, float step_size);
void UI_but_number_precision_set(uiBut *but, float precision);
 
void UI_but_number_slider_step_size_set(uiBut *but, float step_size);
void UI_but_number_slider_precision_set(uiBut *but, float precision);
 
void UI_but_label_alpha_factor_set(uiBut *but, float alpha_factor);
 
void UI_but_search_preview_grid_size_set(uiBut *but, int rows, int cols);
 
void UI_but_view_item_draw_size_set(uiBut *but,
                                    const std::optional<int> draw_width = std::nullopt,
                                    const std::optional<int> draw_height = std::nullopt);
 
void UI_block_func_handle_set(uiBlock *block, uiBlockHandleFunc func, void *arg);
void UI_block_func_set(uiBlock *block, uiButHandleFunc func, void *arg1, void *arg2);
void UI_block_funcN_set(uiBlock *block,
                        uiButHandleNFunc funcN,
                        void *argN,
                        void *arg2,
                        uiButArgNFree func_argN_free_fn = MEM_freeN,
                        uiButArgNCopy func_argN_copy_fn = MEM_dupallocN);
 
void UI_but_func_rename_set(uiBut *but, uiButHandleRenameFunc func, void *arg1);
void UI_but_func_rename_full_set(uiBut *but,
                                 std::function<void(std::string &new_name)> rename_full_func);
void UI_but_func_set(uiBut *but, uiButHandleFunc func, void *arg1, void *arg2);
void UI_but_funcN_set(uiBut *but,
                      uiButHandleNFunc funcN,
                      void *argN,
                      void *arg2,
                      uiButArgNFree func_argN_free_fn = MEM_freeN,
                      uiButArgNCopy func_argN_copy_fn = MEM_dupallocN);
 
void UI_but_func_complete_set(uiBut *but, uiButCompleteFunc func, void *arg);
 
void UI_but_func_drawextra_set(uiBlock *block,
                               std::function<void(const bContext *C, rcti *rect)> func);
 
void UI_but_func_menu_step_set(uiBut *but, uiMenuStepFunc func);
 
void UI_but_func_tooltip_set(uiBut *but, uiButToolTipFunc func, void *arg, uiFreeArgFunc free_arg);
void UI_but_func_tooltip_label_set(uiBut *but, std::function<std::string(const uiBut *but)> func);
 
enum uiTooltipStyle {
  UI_TIP_STYLE_NORMAL = 0, /* Regular text. */
  UI_TIP_STYLE_HEADER,     /* Header text. */
  UI_TIP_STYLE_MONO,       /* Mono-spaced text. */
  UI_TIP_STYLE_IMAGE,      /* Image field. */
  UI_TIP_STYLE_SPACER,     /* Padding to separate sections. */
};
 
enum uiTooltipColorID {
  UI_TIP_LC_MAIN = 0, /* Color of primary text. */
  UI_TIP_LC_VALUE,    /* Color for the value of buttons (also shortcuts). */
  UI_TIP_LC_ACTIVE,   /* Color of titles of active enum values. */
  UI_TIP_LC_NORMAL,   /* Color of regular text. */
  UI_TIP_LC_PYTHON,   /* Color of python snippets. */
  UI_TIP_LC_ALERT,    /* Warning text color, eg: why operator can't run. */
  UI_TIP_LC_MAX
};
 
enum class uiTooltipImageBackground {
  None = 0,
  Checkerboard_Themed,
  Checkerboard_Fixed,
};
 
struct uiTooltipImage {
  ImBuf *ibuf = nullptr;
  short width = 0;
  short height = 0;
  bool premultiplied = false;
  bool border = false;
  bool text_color = false;
  uiTooltipImageBackground background = uiTooltipImageBackground::None;
};
 
void UI_but_func_tooltip_custom_set(uiBut *but,
                                    uiButToolTipCustomFunc func,
                                    void *arg,
                                    uiFreeArgFunc free_arg);

void UI_tooltip_text_field_add(uiTooltipData &data,
                               std::string text,
                               std::string suffix,
                               const uiTooltipStyle style,
                               const uiTooltipColorID color_id,
                               const bool is_pad = false);

void UI_tooltip_image_field_add(uiTooltipData &data, const uiTooltipImage &image_data);

void UI_but_tooltip_refresh(bContext *C, uiBut *but);
void UI_but_tooltip_timer_remove(bContext *C, uiBut *but);
 
bool UI_textbutton_activate_rna(const bContext *C,
                                ARegion *region,
                                const void *rna_poin_data,
                                const char *rna_prop_id);
bool UI_textbutton_activate_but(const bContext *C, uiBut *actbut);

void UI_but_focus_on_enter_event(wmWindow *win, uiBut *but);
 
void UI_but_func_hold_set(uiBut *but, uiButHandleHoldFunc func, void *argN);
 
PointerRNA *UI_but_extra_operator_icon_add(uiBut *but,
                                           const char *opname,
                                           wmOperatorCallContext opcontext,
                                           int icon);
wmOperatorType *UI_but_extra_operator_icon_optype_get(const uiButExtraOpIcon *extra_icon);
PointerRNA *UI_but_extra_operator_icon_opptr_get(const uiButExtraOpIcon *extra_icon);

int UI_preview_tile_size_x(const int size_px = 96);
int UI_preview_tile_size_y(const int size_px = 96);
int UI_preview_tile_size_y_no_label(const int size_px = 96);
 
/* Autocomplete
 *
 * Tab complete helper functions, for use in uiButCompleteFunc callbacks.
 * Call begin once, then multiple times do_name with all possibilities,
 * and finally end to finish and get the completed name. */
 
struct AutoComplete;
 
#define AUTOCOMPLETE_NO_MATCH 0
#define AUTOCOMPLETE_FULL_MATCH 1
#define AUTOCOMPLETE_PARTIAL_MATCH 2
 
AutoComplete *UI_autocomplete_begin(const char *startname, size_t maxncpy);
void UI_autocomplete_update_name(AutoComplete *autocpl, const char *name);
int UI_autocomplete_end(AutoComplete *autocpl, char *autoname);
 
/* Button drag-data (interface_drag.cc).
 *
 * Functions to set drag data for buttons. This enables dragging support, whereby the drag data is
 * "dragged", not the button itself. */
 
void UI_but_drag_set_id(uiBut *but, ID *id);
void UI_but_drag_attach_image(uiBut *but, const ImBuf *imb, float scale);

void UI_but_drag_set_asset(uiBut *but,
                           const blender::asset_system::AssetRepresentation *asset,
                           int import_method, /* eAssetImportMethod */
                           int icon,
                           const ImBuf *imb,
                           float scale);
 
void UI_but_drag_set_rna(uiBut *but, PointerRNA *ptr);
void UI_but_drag_set_path(uiBut *but, const char *path);
void UI_but_drag_set_name(uiBut *but, const char *name);

void UI_but_drag_set_image(uiBut *but, const char *path, int icon, const ImBuf *imb, float scale);
 
/* Panels
 *
 * Functions for creating, freeing and drawing panels. The API here
 * could use a good cleanup, though how they will function in 2.5 is
 * not clear yet so we postpone that. */
 
void UI_panels_begin(const bContext *C, ARegion *region);
void UI_panels_end(const bContext *C, ARegion *region, int *r_x, int *r_y);
void UI_panels_draw(const bContext *C, ARegion *region);
 
Panel *UI_panel_find_by_type(ListBase *lb, const PanelType *pt);
Panel *UI_panel_begin(
    ARegion *region, ListBase *lb, uiBlock *block, PanelType *pt, Panel *panel, bool *r_open);
void UI_panel_header_buttons_begin(Panel *panel);
void UI_panel_header_buttons_end(Panel *panel);
void UI_panel_end(Panel *panel, int width, int height);

void UI_panel_drawname_set(Panel *panel, blender::StringRef name);

void UI_panel_context_pointer_set(Panel *panel, const char *name, PointerRNA *ptr);

bool UI_panel_is_closed(const Panel *panel);
bool UI_panel_is_active(const Panel *panel);
void UI_panel_label_offset(const uiBlock *block, int *r_x, int *r_y);
bool UI_panel_should_show_background(const ARegion *region, const PanelType *panel_type);
int UI_panel_size_y(const Panel *panel);
bool UI_panel_is_dragging(const Panel *panel);
bool UI_panel_matches_search_filter(const Panel *panel);
bool UI_panel_can_be_pinned(const Panel *panel);
 
bool UI_panel_category_is_visible(const ARegion *region);
void UI_panel_category_add(ARegion *region, const char *name);
PanelCategoryDyn *UI_panel_category_find(const ARegion *region, const char *idname);
int UI_panel_category_index_find(ARegion *region, const char *idname);
PanelCategoryStack *UI_panel_category_active_find(ARegion *region, const char *idname);
const char *UI_panel_category_active_get(ARegion *region, bool set_fallback);
void UI_panel_category_active_set(ARegion *region, const char *idname);
void UI_panel_category_index_active_set(ARegion *region, const int index);
void UI_panel_category_active_set_default(ARegion *region, const char *idname);
void UI_panel_category_clear_all(ARegion *region);
void UI_panel_category_draw_all(ARegion *region, const char *category_id_active);
 
/* Panel custom data. */
PointerRNA *UI_panel_custom_data_get(const Panel *panel);
PointerRNA *UI_region_panel_custom_data_under_cursor(const bContext *C, const wmEvent *event);
void UI_panel_custom_data_set(Panel *panel, PointerRNA *custom_data);
 
/* Poly-instantiated panels for representing a list of data. */
Panel *UI_panel_add_instanced(const bContext *C,
                              ARegion *region,
                              ListBase *panels,
                              const char *panel_idname,
                              PointerRNA *custom_data);
void UI_panels_free_instanced(const bContext *C, ARegion *region);
 
#define INSTANCED_PANEL_UNIQUE_STR_SIZE 16
void UI_list_panel_unique_str(Panel *panel, char *r_name);
 
using uiListPanelIDFromDataFunc = void (*)(void *data_link, char *r_idname);
bool UI_panel_list_matches_data(ARegion *region,
                                ListBase *data,
                                uiListPanelIDFromDataFunc panel_idname_func);
 
/* Handlers
 *
 * Handlers that can be registered in regions, areas and windows for
 * handling WM events. Mostly this is done automatic by modules such
 * as screen/ if ED_KEYMAP_UI is set, or internally in popup functions. */
 
void UI_region_handlers_add(ListBase *handlers);
void UI_popup_handlers_add(bContext *C, ListBase *handlers, uiPopupBlockHandle *popup, char flag);
void UI_popup_handlers_remove(ListBase *handlers, uiPopupBlockHandle *popup);
void UI_popup_handlers_remove_all(bContext *C, ListBase *handlers);
 
/* Module
 *
 * init and exit should be called before using this module. init_userdef must
 * be used to reinitialize some internal state if user preferences change. */
 
void UI_init();
/* after reading userdef file */
void UI_init_userdef();
void UI_reinit_font();
void UI_exit();
 
/* When changing UI font, update text style weights with default font weight
 * if non-variable. Therefore fixed weight bold font will look bold. */
void UI_update_text_styles();
 
/* Layout
 *
 * More automated layout of buttons. Has three levels:
 * - Layout: contains a number templates, within a bounded width or height.
 * - Template: predefined layouts for buttons with a number of slots, each
 *   slot can contain multiple items.
 * - Item: item to put in a template slot, being either an RNA property,
 *   operator, label or menu. Also regular buttons can be used when setting
 *   uiBlockCurLayout. */
 
/* layout */
enum {
  UI_LAYOUT_HORIZONTAL = 0,
  UI_LAYOUT_VERTICAL = 1,
};
 
enum {
  UI_LAYOUT_PANEL = 0,
  UI_LAYOUT_HEADER = 1,
  UI_LAYOUT_MENU = 2,
  UI_LAYOUT_TOOLBAR = 3,
  UI_LAYOUT_PIEMENU = 4,
  UI_LAYOUT_VERT_BAR = 5,
};
 
#define UI_UNIT_X ((void)0, U.widget_unit)
#define UI_UNIT_Y ((void)0, U.widget_unit)
 
enum {
  UI_LAYOUT_ALIGN_EXPAND = 0,
  UI_LAYOUT_ALIGN_LEFT = 1,
  UI_LAYOUT_ALIGN_CENTER = 2,
  UI_LAYOUT_ALIGN_RIGHT = 3,
};
 
enum eUI_Item_Flag {
  /* UI_ITEM_O_RETURN_PROPS = 1 << 0, */ /* UNUSED */
  UI_ITEM_R_EXPAND = 1 << 1,
  UI_ITEM_R_SLIDER = 1 << 2,
  UI_ITEM_R_TOGGLE = 1 << 3,
  UI_ITEM_R_ICON_NEVER = 1 << 4,
  UI_ITEM_R_ICON_ONLY = 1 << 5,
  UI_ITEM_R_EVENT = 1 << 6,
  UI_ITEM_R_FULL_EVENT = 1 << 7,
  UI_ITEM_R_NO_BG = 1 << 8,
  UI_ITEM_R_IMMEDIATE = 1 << 9,
  UI_ITEM_O_DEPRESS = 1 << 10,
  UI_ITEM_R_COMPACT = 1 << 11,
  UI_ITEM_R_CHECKBOX_INVERT = 1 << 12,
  UI_ITEM_R_FORCE_BLANK_DECORATE = 1 << 13,
  /* Even create the property split layout if there's no name to show there. */
  UI_ITEM_R_SPLIT_EMPTY_NAME = 1 << 14,
  UI_ITEM_R_TEXT_BUT_FORCE_SEMI_MODAL_ACTIVE = 1 << 15,
};
ENUM_OPERATORS(eUI_Item_Flag, UI_ITEM_R_TEXT_BUT_FORCE_SEMI_MODAL_ACTIVE)
#define UI_ITEM_NONE eUI_Item_Flag(0)
 
#define UI_HEADER_OFFSET ((void)0, 0.4f * UI_UNIT_X)
 
/* uiLayoutOperatorButs flags */
enum {
  UI_TEMPLATE_OP_PROPS_SHOW_TITLE = 1 << 0,
  UI_TEMPLATE_OP_PROPS_SHOW_EMPTY = 1 << 1,
  UI_TEMPLATE_OP_PROPS_COMPACT = 1 << 2,
  UI_TEMPLATE_OP_PROPS_HIDE_ADVANCED = 1 << 3,
  /* Disable property split for the default layout (custom ui callbacks still have full control
   * over the layout and can enable it). */
  UI_TEMPLATE_OP_PROPS_NO_SPLIT_LAYOUT = 1 << 4,
  UI_TEMPLATE_OP_PROPS_HIDE_PRESETS = 1 << 5,
};
 
/* Used for transparent checkers shown under color buttons that have an alpha component. */
#define UI_ALPHA_CHECKER_DARK 100
#define UI_ALPHA_CHECKER_LIGHT 160
 
/* flags to set which corners will become rounded:
 *
 * 1------2
 * |      |
 * 8------4 */
 
enum {
  UI_CNR_TOP_LEFT = 1 << 0,
  UI_CNR_TOP_RIGHT = 1 << 1,
  UI_CNR_BOTTOM_RIGHT = 1 << 2,
  UI_CNR_BOTTOM_LEFT = 1 << 3,
  /* just for convenience */
  UI_CNR_NONE = 0,
  UI_CNR_ALL = (UI_CNR_TOP_LEFT | UI_CNR_TOP_RIGHT | UI_CNR_BOTTOM_RIGHT | UI_CNR_BOTTOM_LEFT),
};
 
uiLayout *UI_block_layout(uiBlock *block,
                          int dir,
                          int type,
                          int x,
                          int y,
                          int size,
                          int em,
                          int padding,
                          const uiStyle *style);
void UI_block_layout_set_current(uiBlock *block, uiLayout *layout);
void UI_block_layout_resolve(uiBlock *block, int *r_x, int *r_y);
bool UI_block_layout_needs_resolving(const uiBlock *block);
void UI_block_layout_free(uiBlock *block);

bool UI_block_apply_search_filter(uiBlock *block, const char *search_filter);
 
void UI_region_message_subscribe(ARegion *region, wmMsgBus *mbus);
 
uiBlock *uiLayoutGetBlock(uiLayout *layout);
 
void uiLayoutSetFunc(uiLayout *layout, uiMenuHandleFunc handlefunc, void *argv);
void uiLayoutSetContextPointer(uiLayout *layout, const char *name, PointerRNA *ptr);
void uiLayoutSetContextString(uiLayout *layout, const char *name, blender::StringRef value);
bContextStore *uiLayoutGetContextStore(uiLayout *layout);
void uiLayoutContextCopy(uiLayout *layout, const bContextStore *context);

void uiLayoutSetTooltipFunc(uiLayout *layout,
                            uiButToolTipFunc func,
                            void *arg,
                            uiCopyArgFunc copy_arg,
                            uiFreeArgFunc free_arg);

wmOperatorType *UI_but_operatortype_get_from_enum_menu(uiBut *but, PropertyRNA **r_prop);
MenuType *UI_but_menutype_get(const uiBut *but);
PanelType *UI_but_paneltype_get(const uiBut *but);
std::optional<blender::StringRefNull> UI_but_asset_shelf_type_idname_get(const uiBut *but);
void UI_menutype_draw(bContext *C, MenuType *mt, uiLayout *layout);
void UI_paneltype_draw(bContext *C, PanelType *pt, uiLayout *layout);
 
/* Only for convenience. */
void uiLayoutSetContextFromBut(uiLayout *layout, uiBut *but);
 
void uiLayoutSetOperatorContext(uiLayout *layout, wmOperatorCallContext opcontext);
void uiLayoutSetActive(uiLayout *layout, bool active);
void uiLayoutSetActiveDefault(uiLayout *layout, bool active_default);
void uiLayoutSetActivateInit(uiLayout *layout, bool activate_init);
void uiLayoutSetEnabled(uiLayout *layout, bool enabled);
void uiLayoutSetRedAlert(uiLayout *layout, bool redalert);
void uiLayoutSetAlignment(uiLayout *layout, char alignment);
void uiLayoutSetFixedSize(uiLayout *layout, bool fixed_size);
void uiLayoutSetKeepAspect(uiLayout *layout, bool keepaspect);
void uiLayoutSetScaleX(uiLayout *layout, float scale);
void uiLayoutSetScaleY(uiLayout *layout, float scale);
void uiLayoutSetUnitsX(uiLayout *layout, float unit);
void uiLayoutSetUnitsY(uiLayout *layout, float unit);
void uiLayoutSetEmboss(uiLayout *layout, eUIEmbossType emboss);
void uiLayoutSetPropSep(uiLayout *layout, bool is_sep);
void uiLayoutSetPropDecorate(uiLayout *layout, bool is_sep);
int uiLayoutGetLocalDir(const uiLayout *layout);
void uiLayoutSetSearchWeight(uiLayout *layout, float weight);
 
wmOperatorCallContext uiLayoutGetOperatorContext(uiLayout *layout);
bool uiLayoutGetActive(uiLayout *layout);
bool uiLayoutGetActiveDefault(uiLayout *layout);
bool uiLayoutGetActivateInit(uiLayout *layout);
bool uiLayoutGetEnabled(uiLayout *layout);
bool uiLayoutGetRedAlert(uiLayout *layout);
int uiLayoutGetAlignment(uiLayout *layout);
bool uiLayoutGetFixedSize(uiLayout *layout);
bool uiLayoutGetKeepAspect(uiLayout *layout);
int uiLayoutGetWidth(uiLayout *layout);
float uiLayoutGetScaleX(uiLayout *layout);
float uiLayoutGetScaleY(uiLayout *layout);
float uiLayoutGetUnitsX(uiLayout *layout);
float uiLayoutGetUnitsY(uiLayout *layout);
eUIEmbossType uiLayoutGetEmboss(uiLayout *layout);
bool uiLayoutGetPropSep(uiLayout *layout);
bool uiLayoutGetPropDecorate(uiLayout *layout);
Panel *uiLayoutGetRootPanel(uiLayout *layout);
float uiLayoutGetSearchWeight(uiLayout *layout);
 
int uiLayoutListItemPaddingWidth();
void uiLayoutListItemAddPadding(uiLayout *layout);
 
/* Layout create functions. */
 
uiLayout *uiLayoutRow(uiLayout *layout, bool align);
 
struct PanelLayout {
  uiLayout *header;
  uiLayout *body;
};

PanelLayout uiLayoutPanelProp(const bContext *C,
                              uiLayout *layout,
                              PointerRNA *open_prop_owner,
                              const char *open_prop_name);

uiLayout *uiLayoutPanelProp(const bContext *C,
                            uiLayout *layout,
                            PointerRNA *open_prop_owner,
                            const char *open_prop_name,
                            const char *label);

PanelLayout uiLayoutPanel(const bContext *C,
                          uiLayout *layout,
                          const char *idname,
                          bool default_closed);

uiLayout *uiLayoutPanel(const bContext *C,
                        uiLayout *layout,
                        const char *idname,
                        bool default_closed,
                        const char *label);
 
bool uiLayoutEndsWithPanelHeader(const uiLayout &layout);

uiLayout *uiLayoutRowWithHeading(uiLayout *layout, bool align, const char *heading);
uiLayout *uiLayoutColumn(uiLayout *layout, bool align);
uiLayout *uiLayoutColumnWithHeading(uiLayout *layout, bool align, const char *heading);
uiLayout *uiLayoutColumnFlow(uiLayout *layout, int number, bool align);
uiLayout *uiLayoutGridFlow(uiLayout *layout,
                           bool row_major,
                           int columns_len,
                           bool even_columns,
                           bool even_rows,
                           bool align);
uiLayout *uiLayoutBox(uiLayout *layout);
uiLayout *uiLayoutListBox(uiLayout *layout,
                          uiList *ui_list,
                          PointerRNA *actptr,
                          PropertyRNA *actprop);
uiLayout *uiLayoutAbsolute(uiLayout *layout, bool align);
uiLayout *uiLayoutSplit(uiLayout *layout, float percentage, bool align);
uiLayout *uiLayoutOverlap(uiLayout *layout);
uiBlock *uiLayoutAbsoluteBlock(uiLayout *layout);
uiLayout *uiLayoutRadial(uiLayout *layout);
 
/* templates */
void uiTemplateHeader(uiLayout *layout, bContext *C);
void uiTemplateID(uiLayout *layout,
                  const bContext *C,
                  PointerRNA *ptr,
                  const char *propname,
                  const char *newop,
                  const char *openop,
                  const char *unlinkop,
                  int filter = UI_TEMPLATE_ID_FILTER_ALL,
                  bool live_icon = false,
                  const char *text = nullptr);
void uiTemplateIDBrowse(uiLayout *layout,
                        bContext *C,
                        PointerRNA *ptr,
                        const char *propname,
                        const char *newop,
                        const char *openop,
                        const char *unlinkop,
                        int filter = UI_TEMPLATE_ID_FILTER_ALL,
                        const char *text = nullptr);
void uiTemplateIDPreview(uiLayout *layout,
                         bContext *C,
                         PointerRNA *ptr,
                         const char *propname,
                         const char *newop,
                         const char *openop,
                         const char *unlinkop,
                         int rows,
                         int cols,
                         int filter = UI_TEMPLATE_ID_FILTER_ALL,
                         bool hide_buttons = false);
void uiTemplateIDTabs(uiLayout *layout,
                      bContext *C,
                      PointerRNA *ptr,
                      const char *propname,
                      const char *newop,
                      const char *menu,
                      int filter = UI_TEMPLATE_ID_FILTER_ALL);
void uiTemplateAnyID(uiLayout *layout,
                     PointerRNA *ptr,
                     const char *propname,
                     const char *proptypename,
                     const char *text);

void uiTemplateAction(uiLayout *layout,
                      const bContext *C,
                      ID *id,
                      const char *newop,
                      const char *unlinkop,
                      const char *text);

void uiTemplateSearch(uiLayout *layout,
                      const bContext *C,
                      PointerRNA *ptr,
                      const char *propname,
                      PointerRNA *searchptr,
                      const char *searchpropname,
                      const char *newop,
                      const char *unlinkop,
                      const char *text = nullptr);
void uiTemplateSearchPreview(uiLayout *layout,
                             bContext *C,
                             PointerRNA *ptr,
                             const char *propname,
                             PointerRNA *searchptr,
                             const char *searchpropname,
                             const char *newop,
                             const char *unlinkop,
                             int rows,
                             int cols,
                             const char *text = nullptr);
void uiTemplatePathBuilder(uiLayout *layout,
                           PointerRNA *ptr,
                           const char *propname,
                           PointerRNA *root_ptr,
                           const char *text);
void uiTemplateModifiers(uiLayout *layout, bContext *C);
void uiTemplateShaderFx(uiLayout *layout, bContext *C);
void uiTemplateConstraints(uiLayout *layout, bContext *C, bool use_bone_constraints);
 
uiLayout *uiTemplateGpencilModifier(uiLayout *layout, bContext *C, PointerRNA *ptr);
void uiTemplateGpencilColorPreview(uiLayout *layout,
                                   bContext *C,
                                   PointerRNA *ptr,
                                   const char *propname,
                                   int rows,
                                   int cols,
                                   float scale,
                                   int filter);
 
void uiTemplateOperatorRedoProperties(uiLayout *layout, const bContext *C);
 
void uiTemplateConstraintHeader(uiLayout *layout, PointerRNA *ptr);
void uiTemplatePreview(uiLayout *layout,
                       bContext *C,
                       ID *id,
                       bool show_buttons,
                       ID *parent,
                       MTex *slot,
                       const char *preview_id);
void uiTemplateColorRamp(uiLayout *layout, PointerRNA *ptr, const char *propname, bool expand);
void uiTemplateIcon(uiLayout *layout, int icon_value, float icon_scale);
void uiTemplateIconView(uiLayout *layout,
                        PointerRNA *ptr,
                        const char *propname,
                        bool show_labels,
                        float icon_scale,
                        float icon_scale_popup);
void uiTemplateHistogram(uiLayout *layout, PointerRNA *ptr, const char *propname);
void uiTemplateWaveform(uiLayout *layout, PointerRNA *ptr, const char *propname);
void uiTemplateVectorscope(uiLayout *layout, PointerRNA *ptr, const char *propname);
void uiTemplateCurveMapping(uiLayout *layout,
                            PointerRNA *ptr,
                            const char *propname,
                            int type,
                            bool levels,
                            bool brush,
                            bool neg_slope,
                            bool tone);
void uiTemplateCurveProfile(uiLayout *layout, PointerRNA *ptr, const char *propname);
void uiTemplateColorPicker(uiLayout *layout,
                           PointerRNA *ptr,
                           const char *propname,
                           bool value_slider,
                           bool lock,
                           bool lock_luminosity,
                           bool cubic);
void uiTemplatePalette(uiLayout *layout, PointerRNA *ptr, const char *propname, bool colors);
void uiTemplateCryptoPicker(uiLayout *layout, PointerRNA *ptr, const char *propname, int icon);
void uiTemplateLayers(uiLayout *layout,
                      PointerRNA *ptr,
                      const char *propname,
                      PointerRNA *used_ptr,
                      const char *used_propname,
                      int active_layer);
void uiTemplateImage(uiLayout *layout,
                     bContext *C,
                     PointerRNA *ptr,
                     const char *propname,
                     PointerRNA *userptr,
                     bool compact,
                     bool multiview);
void uiTemplateImageSettings(uiLayout *layout, PointerRNA *imfptr, bool color_management);
void uiTemplateImageStereo3d(uiLayout *layout, PointerRNA *stereo3d_format_ptr);
void uiTemplateImageViews(uiLayout *layout, PointerRNA *imaptr);
void uiTemplateImageFormatViews(uiLayout *layout, PointerRNA *imfptr, PointerRNA *ptr);
void uiTemplateImageLayers(uiLayout *layout, bContext *C, Image *ima, ImageUser *iuser);
void uiTemplateImageInfo(uiLayout *layout, bContext *C, Image *ima, ImageUser *iuser);
void uiTemplateRunningJobs(uiLayout *layout, bContext *C);
void UI_but_func_operator_search(uiBut *but);
void uiTemplateOperatorSearch(uiLayout *layout);
 
void UI_but_func_menu_search(uiBut *but, const char *single_menu_idname = nullptr);
void uiTemplateMenuSearch(uiLayout *layout);

void uiTemplateOperatorPropertyButs(
    const bContext *C, uiLayout *layout, wmOperator *op, eButLabelAlign label_align, short flag);
void uiTemplateHeader3D_mode(uiLayout *layout, bContext *C);
void uiTemplateEditModeSelection(uiLayout *layout, bContext *C);
void uiTemplateReportsBanner(uiLayout *layout, bContext *C);
void uiTemplateInputStatus(uiLayout *layout, bContext *C);
void uiTemplateStatusInfo(uiLayout *layout, bContext *C);
void uiTemplateKeymapItemProperties(uiLayout *layout, PointerRNA *ptr);
 
bool uiTemplateEventFromKeymapItem(uiLayout *layout,
                                   const char *text,
                                   const wmKeyMapItem *kmi,
                                   bool text_fallback);
 
/* Draw keymap item for status bar. Returns number of items consumed,
 * as X/Y/Z items may get merged to use less space. */
int uiTemplateStatusBarModalItem(uiLayout *layout,
                                 const wmKeyMap *keymap,
                                 const EnumPropertyItem *item);
 
void uiTemplateComponentMenu(uiLayout *layout,
                             PointerRNA *ptr,
                             const char *propname,
                             const char *name);
void uiTemplateNodeSocket(uiLayout *layout, bContext *C, const float color[4]);

void uiTemplateCacheFile(uiLayout *layout,
                         const bContext *C,
                         PointerRNA *ptr,
                         const char *propname);

bool uiTemplateCacheFilePointer(PointerRNA *ptr, const char *propname, PointerRNA *r_file_ptr);

void uiTemplateCacheFileVelocity(uiLayout *layout, PointerRNA *fileptr);

void uiTemplateCacheFileProcedural(uiLayout *layout, const bContext *C, PointerRNA *fileptr);

void uiTemplateCacheFileTimeSettings(uiLayout *layout, PointerRNA *fileptr);

void uiTemplateCacheFileLayers(uiLayout *layout, const bContext *C, PointerRNA *fileptr);

#define UI_UL_DEFAULT_CLASS_NAME "UI_UL_list"
enum uiTemplateListFlags {
  UI_TEMPLATE_LIST_FLAG_NONE = 0,
  UI_TEMPLATE_LIST_SORT_REVERSE = (1 << 0),
  UI_TEMPLATE_LIST_SORT_LOCK = (1 << 1),
  UI_TEMPLATE_LIST_NO_GRIP = (1 << 2),
  UI_TEMPLATE_LIST_NO_FILTER_OPTIONS = (1 << 3),
  UI_TEMPLATE_LIST_NO_NAMES = (1 << 4),
 
  UI_TEMPLATE_LIST_FLAGS_LAST
};
ENUM_OPERATORS(uiTemplateListFlags, UI_TEMPLATE_LIST_FLAGS_LAST);
 
void uiTemplateList(uiLayout *layout,
                    const bContext *C,
                    const char *listtype_name,
                    const char *list_id,
                    PointerRNA *dataptr,
                    const char *propname,
                    PointerRNA *active_dataptr,
                    const char *active_propname,
                    const char *item_dyntip_propname,
                    int rows,
                    int maxrows,
                    int layout_type,
                    int columns,
                    enum uiTemplateListFlags flags);
uiList *uiTemplateList_ex(uiLayout *layout,
                          const bContext *C,
                          const char *listtype_name,
                          const char *list_id,
                          PointerRNA *dataptr,
                          const char *propname,
                          PointerRNA *active_dataptr,
                          const char *active_propname,
                          const char *item_dyntip_propname,
                          int rows,
                          int maxrows,
                          int layout_type,
                          int columns,
                          enum uiTemplateListFlags flags,
                          void *customdata);
 
void uiTemplateNodeLink(
    uiLayout *layout, bContext *C, bNodeTree *ntree, bNode *node, bNodeSocket *input);
void uiTemplateNodeView(
    uiLayout *layout, bContext *C, bNodeTree *ntree, bNode *node, bNodeSocket *input);
void uiTemplateTextureUser(uiLayout *layout, bContext *C);
void uiTemplateTextureShow(uiLayout *layout,
                           const bContext *C,
                           PointerRNA *ptr,
                           PropertyRNA *prop);
 
void uiTemplateMovieClip(
    uiLayout *layout, bContext *C, PointerRNA *ptr, const char *propname, bool compact);
void uiTemplateTrack(uiLayout *layout, PointerRNA *ptr, const char *propname);
void uiTemplateMarker(uiLayout *layout,
                      PointerRNA *ptr,
                      const char *propname,
                      PointerRNA *userptr,
                      PointerRNA *trackptr,
                      bool compact);
void uiTemplateMovieclipInformation(uiLayout *layout,
                                    PointerRNA *ptr,
                                    const char *propname,
                                    PointerRNA *userptr);
 
void uiTemplateColorspaceSettings(uiLayout *layout, PointerRNA *ptr, const char *propname);
void uiTemplateColormanagedViewSettings(uiLayout *layout,
                                        bContext *C,
                                        PointerRNA *ptr,
                                        const char *propname);
 
int uiTemplateRecentFiles(uiLayout *layout, int rows);
void uiTemplateFileSelectPath(uiLayout *layout, bContext *C, FileSelectParams *params);
 
enum {
  UI_TEMPLATE_ASSET_DRAW_NO_NAMES = (1 << 0),
  UI_TEMPLATE_ASSET_DRAW_NO_FILTER = (1 << 1),
  UI_TEMPLATE_ASSET_DRAW_NO_LIBRARY = (1 << 2),
};
void uiTemplateAssetView(uiLayout *layout,
                         const bContext *C,
                         const char *list_id,
                         PointerRNA *asset_library_dataptr,
                         const char *asset_library_propname,
                         PointerRNA *assets_dataptr,
                         const char *assets_propname,
                         PointerRNA *active_dataptr,
                         const char *active_propname,
                         const blender::ed::asset::AssetFilterSettings *filter_settings,
                         int display_flags,
                         const char *activate_opname,
                         PointerRNA *r_activate_op_properties,
                         const char *drag_opname,
                         PointerRNA *r_drag_op_properties);
 
namespace blender::ui {
 
void template_asset_shelf_popover(uiLayout &layout,
                                  const bContext &C,
                                  StringRefNull asset_shelf_id,
                                  StringRefNull name,
                                  int icon);
 
}
 
void uiTemplateLightLinkingCollection(uiLayout *layout,
                                      uiLayout *context_layout,
                                      PointerRNA *ptr,
                                      const char *propname);
 
void uiTemplateBoneCollectionTree(uiLayout *layout, bContext *C);
void uiTemplateGreasePencilLayerTree(uiLayout *layout, bContext *C);
 
void uiTemplateNodeTreeInterface(uiLayout *layout, PointerRNA *ptr);
void uiTemplateNodeInputs(uiLayout *layout, bContext *C, PointerRNA *ptr);
 
void uiTemplateCollectionExporters(uiLayout *layout, bContext *C);

bool UI_list_item_index_is_filtered_visible(const struct uiList *ui_list, int item_idx);

PointerRNA *UI_list_custom_activate_operator_set(uiList *ui_list,
                                                 const char *opname,
                                                 bool create_properties);
PointerRNA *UI_list_custom_drag_operator_set(uiList *ui_list,
                                             const char *opname,
                                             bool create_properties);
 
/* items */
void uiItemO(uiLayout *layout, const char *name, int icon, const char *opname);
void uiItemEnumO_ptr(uiLayout *layout,
                     wmOperatorType *ot,
                     const char *name,
                     int icon,
                     const char *propname,
                     int value);
void uiItemEnumO(uiLayout *layout,
                 const char *opname,
                 const char *name,
                 int icon,
                 const char *propname,
                 int value);
void uiItemEnumO_value(uiLayout *layout,
                       const char *name,
                       int icon,
                       const char *opname,
                       const char *propname,
                       int value);
void uiItemEnumO_string(uiLayout *layout,
                        const char *name,
                        int icon,
                        const char *opname,
                        const char *propname,
                        const char *value_str);
void uiItemsEnumO(uiLayout *layout, const char *opname, const char *propname);
void uiItemBooleanO(uiLayout *layout,
                    const char *name,
                    int icon,
                    const char *opname,
                    const char *propname,
                    int value);
void uiItemIntO(uiLayout *layout,
                const char *name,
                int icon,
                const char *opname,
                const char *propname,
                int value);
void uiItemFloatO(uiLayout *layout,
                  const char *name,
                  int icon,
                  const char *opname,
                  const char *propname,
                  float value);
void uiItemStringO(uiLayout *layout,
                   const char *name,
                   int icon,
                   const char *opname,
                   const char *propname,
                   const char *value);
 
void uiItemFullO_ptr(uiLayout *layout,
                     wmOperatorType *ot,
                     const char *name,
                     int icon,
                     IDProperty *properties,
                     wmOperatorCallContext context,
                     eUI_Item_Flag flag,
                     PointerRNA *r_opptr);
void uiItemFullO(uiLayout *layout,
                 const char *opname,
                 const char *name,
                 int icon,
                 IDProperty *properties,
                 wmOperatorCallContext context,
                 eUI_Item_Flag flag,
                 PointerRNA *r_opptr);
void uiItemFullOMenuHold_ptr(uiLayout *layout,
                             wmOperatorType *ot,
                             const char *name,
                             int icon,
                             IDProperty *properties,
                             wmOperatorCallContext context,
                             eUI_Item_Flag flag,
                             const char *menu_id, /* extra menu arg. */
                             PointerRNA *r_opptr);
 
void uiItemR(uiLayout *layout,
             PointerRNA *ptr,
             const char *propname,
             eUI_Item_Flag flag,
             const char *name,
             int icon);
void uiItemFullR(uiLayout *layout,
                 PointerRNA *ptr,
                 PropertyRNA *prop,
                 int index,
                 int value,
                 eUI_Item_Flag flag,
                 const char *name,
                 int icon,
                 const char *placeholder = nullptr);
void uiItemFullR_with_popover(uiLayout *layout,
                              PointerRNA *ptr,
                              PropertyRNA *prop,
                              int index,
                              int value,
                              eUI_Item_Flag flag,
                              const char *name,
                              int icon,
                              const char *panel_type);
void uiItemFullR_with_menu(uiLayout *layout,
                           PointerRNA *ptr,
                           PropertyRNA *prop,
                           int index,
                           int value,
                           eUI_Item_Flag flag,
                           const char *name,
                           int icon,
                           const char *menu_type);
void uiItemEnumR_prop(
    uiLayout *layout, const char *name, int icon, PointerRNA *ptr, PropertyRNA *prop, int value);
void uiItemEnumR(uiLayout *layout,
                 const char *name,
                 int icon,
                 PointerRNA *ptr,
                 const char *propname,
                 int value);
void uiItemEnumR_string_prop(uiLayout *layout,
                             PointerRNA *ptr,
                             PropertyRNA *prop,
                             const char *value,
                             const char *name,
                             int icon);
void uiItemEnumR_string(uiLayout *layout,
                        PointerRNA *ptr,
                        const char *propname,
                        const char *value,
                        const char *name,
                        int icon);
void uiItemsEnumR(uiLayout *layout, PointerRNA *ptr, const char *propname);
void uiItemPointerR_prop(uiLayout *layout,
                         PointerRNA *ptr,
                         PropertyRNA *prop,
                         PointerRNA *searchptr,
                         PropertyRNA *searchprop,
                         const char *name,
                         int icon,
                         bool results_are_suggestions);
void uiItemPointerR(uiLayout *layout,
                    PointerRNA *ptr,
                    const char *propname,
                    PointerRNA *searchptr,
                    const char *searchpropname,
                    const char *name,
                    int icon);

void uiItemsFullEnumO(uiLayout *layout,
                      const char *opname,
                      const char *propname,
                      IDProperty *properties,
                      wmOperatorCallContext context,
                      eUI_Item_Flag flag,
                      const int active = -1);
void uiItemsFullEnumO_items(uiLayout *layout,
                            wmOperatorType *ot,
                            const PointerRNA &ptr,
                            PropertyRNA *prop,
                            IDProperty *properties,
                            wmOperatorCallContext context,
                            eUI_Item_Flag flag,
                            const EnumPropertyItem *item_array,
                            int totitem,
                            int active = -1);
 
struct uiPropertySplitWrapper {
  uiLayout *label_column;
  uiLayout *property_row;
  uiLayout *decorate_column;
};

uiPropertySplitWrapper uiItemPropertySplitWrapperCreate(uiLayout *parent_layout);
 
void uiItemL(uiLayout *layout, const char *name, int icon); /* label */
uiBut *uiItemL_ex(uiLayout *layout, const char *name, int icon, bool highlight, bool redalert);
uiLayout *uiItemL_respect_property_split(uiLayout *layout, const char *text, int icon);
void uiItemLDrag(uiLayout *layout, PointerRNA *ptr, const char *name, int icon);
void uiItemM_ptr(uiLayout *layout, MenuType *mt, const char *name, int icon);
void uiItemM(uiLayout *layout, const char *menuname, const char *name, int icon);
void uiItemMContents(uiLayout *layout, const char *menuname);
 
/* Decorators. */

void uiItemDecoratorR_prop(uiLayout *layout, PointerRNA *ptr, PropertyRNA *prop, int index);
void uiItemDecoratorR(uiLayout *layout, PointerRNA *ptr, const char *propname, int index);
void uiItemS(uiLayout *layout);
void uiItemS_ex(uiLayout *layout,
                float factor,
                LayoutSeparatorType type = LayoutSeparatorType::Auto);
void uiItemSpacer(uiLayout *layout);
 
void uiItemProgressIndicator(uiLayout *layout,
                             const char *text,
                             float factor,
                             enum eButProgressType progress_type);
 
/* popover */
void uiItemPopoverPanel_ptr(
    uiLayout *layout, const bContext *C, PanelType *pt, const char *name, int icon);
void uiItemPopoverPanel(
    uiLayout *layout, const bContext *C, const char *panel_type, const char *name, int icon);
void uiItemPopoverPanelFromGroup(uiLayout *layout,
                                 bContext *C,
                                 int space_id,
                                 int region_id,
                                 const char *context,
                                 const char *category);

void uiItemMenuF(uiLayout *layout, const char *name, int icon, uiMenuCreateFunc func, void *arg);
void uiItemMenuFN(uiLayout *layout, const char *name, int icon, uiMenuCreateFunc func, void *argN);
void uiItemMenuEnumFullO_ptr(uiLayout *layout,
                             const bContext *C,
                             wmOperatorType *ot,
                             const char *propname,
                             const char *name,
                             int icon,
                             PointerRNA *r_opptr);
void uiItemMenuEnumFullO(uiLayout *layout,
                         const bContext *C,
                         const char *opname,
                         const char *propname,
                         const char *name,
                         int icon,
                         PointerRNA *r_opptr);
void uiItemMenuEnumO(uiLayout *layout,
                     const bContext *C,
                     const char *opname,
                     const char *propname,
                     const char *name,
                     int icon);
void uiItemMenuEnumR_prop(
    uiLayout *layout, PointerRNA *ptr, PropertyRNA *prop, const char *name, int icon);
void uiItemMenuEnumR(
    uiLayout *layout, PointerRNA *ptr, const char *propname, const char *name, int icon);
void uiItemTabsEnumR_prop(uiLayout *layout,
                          bContext *C,
                          PointerRNA *ptr,
                          PropertyRNA *prop,
                          PointerRNA *ptr_highlight,
                          PropertyRNA *prop_highlight,
                          bool icon_only);
 
/* Only for testing, inspecting layouts. */
const char *UI_layout_introspect(uiLayout *layout);

uiLayout *uiItemsAlertBox(uiBlock *block,
                          const uiStyle *style,
                          const int dialog_width,
                          const eAlertIcon icon,
                          const int icon_size);
uiLayout *uiItemsAlertBox(uiBlock *block, const int size, const eAlertIcon icon);
 
/* UI Operators */
struct uiDragColorHandle {
  float color[3];
  bool gamma_corrected;
};
 
void ED_operatortypes_ui();
void ED_keymap_ui(wmKeyConfig *keyconf);
void ED_dropboxes_ui();
void ED_uilisttypes_ui();
 
void UI_drop_color_copy(bContext *C, wmDrag *drag, wmDropBox *drop);
bool UI_drop_color_poll(bContext *C, wmDrag *drag, const wmEvent *event);
 
bool UI_context_copy_to_selected_list(bContext *C,
                                      PointerRNA *ptr,
                                      PropertyRNA *prop,
                                      blender::Vector<PointerRNA> *r_lb,
                                      bool *r_use_path_from_id,
                                      std::optional<std::string> *r_path);
bool UI_context_copy_to_selected_check(PointerRNA *ptr,
                                       PointerRNA *ptr_link,
                                       PropertyRNA *prop,
                                       const char *path,
                                       bool use_path_from_id,
                                       PointerRNA *r_ptr,
                                       PropertyRNA **r_prop);
 
/* Helpers for Operators */
uiBut *UI_context_active_but_get(const bContext *C);
uiBut *UI_context_active_but_get_respect_popup(const bContext *C);
uiBut *UI_context_active_but_prop_get(const bContext *C,
                                      PointerRNA *r_ptr,
                                      PropertyRNA **r_prop,
                                      int *r_index);

uiBut *UI_region_active_but_prop_get(const ARegion *region,
                                     PointerRNA *r_ptr,
                                     PropertyRNA **r_prop,
                                     int *r_index);
 
void UI_context_active_but_prop_handle(bContext *C, bool handle_undo);
void UI_context_active_but_clear(bContext *C, wmWindow *win, ARegion *region);
 
wmOperator *UI_context_active_operator_get(const bContext *C);
void UI_context_update_anim_flag(const bContext *C);
void UI_context_active_but_prop_get_filebrowser(const bContext *C,
                                                PointerRNA *r_ptr,
                                                PropertyRNA **r_prop,
                                                bool *r_is_undo,
                                                bool *r_is_userdef);
void UI_context_active_but_prop_get_templateID(const bContext *C,
                                               PointerRNA *r_ptr,
                                               PropertyRNA **r_prop);
ID *UI_context_active_but_get_tab_ID(bContext *C);
 
uiBut *UI_region_active_but_get(const ARegion *region);
uiBut *UI_region_but_find_rect_over(const ARegion *region, const rcti *rect_px);
uiBlock *UI_region_block_find_mouse_over(const ARegion *region, const int xy[2], bool only_clip);
ARegion *UI_region_searchbox_region_get(const ARegion *button_region);

enum eFontStyle_Align {
  UI_STYLE_TEXT_LEFT = 0,
  UI_STYLE_TEXT_CENTER = 1,
  UI_STYLE_TEXT_RIGHT = 2,
};
 
struct uiFontStyleDraw_Params {
  eFontStyle_Align align;
  uint word_wrap : 1;
};
 
/* Styled text draw */
void UI_fontstyle_set(const uiFontStyle *fs);
void UI_fontstyle_draw_ex(const uiFontStyle *fs,
                          const rcti *rect,
                          const char *str,
                          size_t str_len,
                          const uchar col[4],
                          const uiFontStyleDraw_Params *fs_params,
                          int *r_xofs,
                          int *r_yofs,
                          ResultBLF *r_info);
 
void UI_fontstyle_draw(const uiFontStyle *fs,
                       const rcti *rect,
                       const char *str,
                       size_t str_len,
                       const uchar col[4],
                       const uiFontStyleDraw_Params *fs_params);
void UI_fontstyle_draw_rotated(const uiFontStyle *fs,
                               const rcti *rect,
                               const char *str,
                               const uchar col[4]);
void UI_fontstyle_draw_simple(
    const uiFontStyle *fs, float x, float y, const char *str, const uchar col[4]);
void UI_fontstyle_draw_simple_backdrop(const uiFontStyle *fs,
                                       float x,
                                       float y,
                                       blender::StringRef str,
                                       const float col_fg[4],
                                       const float col_bg[4]);
 
int UI_fontstyle_string_width(const uiFontStyle *fs, const char *str) ATTR_WARN_UNUSED_RESULT
    ATTR_NONNULL(1, 2);
int UI_fontstyle_string_width_with_block_aspect(const uiFontStyle *fs,
                                                const char *str,
                                                float aspect) ATTR_WARN_UNUSED_RESULT
    ATTR_NONNULL(1, 2);
int UI_fontstyle_height_max(const uiFontStyle *fs);

void UI_draw_icon_tri(float x, float y, char dir, const float[4]);

const uiStyle *UI_style_get(); /* use for fonts etc */
const uiStyle *UI_style_get_dpi();
 
/* UI_OT_editsource helpers */
bool UI_editsource_enable_check();
void UI_editsource_active_but_test(uiBut *but);
void UI_editsource_but_replace(const uiBut *old_but, uiBut *new_but);

void UI_but_ensure_in_view(const bContext *C, ARegion *region, const uiBut *but);
 
/* UI_butstore_ helpers */
struct uiButStore;

uiButStore *UI_butstore_create(uiBlock *block);
void UI_butstore_clear(uiBlock *block);
void UI_butstore_update(uiBlock *block);
void UI_butstore_free(uiBlock *block, uiButStore *bs_handle);
bool UI_butstore_is_valid(uiButStore *bs_handle);
bool UI_butstore_is_registered(uiBlock *block, uiBut *but);
void UI_butstore_register(uiButStore *bs_handle, uiBut **but_p);
bool UI_butstore_register_update(uiBlock *block, uiBut *but_dst, const uiBut *but_src);
void UI_butstore_unregister(uiButStore *bs_handle, uiBut **but_p);

std::optional<std::string> UI_key_event_operator_string(const bContext *C,
                                                        const char *opname,
                                                        IDProperty *properties,
                                                        bool is_strict);
 
/* ui_interface_region_tooltip.c */

ARegion *UI_tooltip_create_from_button(bContext *C, ARegion *butregion, uiBut *but, bool is_label);
ARegion *UI_tooltip_create_from_button_or_extra_icon(
    bContext *C, ARegion *butregion, uiBut *but, uiButExtraOpIcon *extra_icon, bool is_label);
ARegion *UI_tooltip_create_from_gizmo(bContext *C, wmGizmo *gz);
void UI_tooltip_free(bContext *C, bScreen *screen, ARegion *region);

ARegion *UI_tooltip_create_from_search_item_generic(bContext *C,
                                                    const ARegion *searchbox_region,
                                                    const rcti *item_rect,
                                                    ID *id);
 
/* How long before a tool-tip shows. */
#define UI_TOOLTIP_DELAY 0.5
#define UI_TOOLTIP_DELAY_LABEL 0.2
 
/* Float precision helpers */
#define UI_PRECISION_FLOAT_MAX 6
/* For float buttons the 'step', is scaled */
#define UI_PRECISION_FLOAT_SCALE 0.01f
 
/* Typical UI text */
#define UI_FSTYLE_WIDGET (const uiFontStyle *)&(UI_style_get()->widget)
#define UI_FSTYLE_TOOLTIP (const uiFontStyle *)&(UI_style_get()->tooltip)

int UI_calc_float_precision(int prec, double value);
 
/* widget batched drawing */
void UI_widgetbase_draw_cache_begin();
void UI_widgetbase_draw_cache_flush();
void UI_widgetbase_draw_cache_end();
 
/* Use for resetting the theme. */
void UI_theme_init_default();
void UI_style_init_default();
 
void UI_interface_tag_script_reload();

#define USE_UI_TOOLBAR_HACK

#define USE_UI_POPOVER_ONCE
 
bool UI_view_item_matches(const blender::ui::AbstractViewItem &a,
                          const blender::ui::AbstractViewItem &b);
bool UI_view_item_can_rename(const blender::ui::AbstractViewItem &item);
void UI_view_item_begin_rename(blender::ui::AbstractViewItem &item);
 
bool UI_view_item_supports_drag(const blender::ui::AbstractViewItem &item);
bool UI_view_item_popup_keep_open(const blender::ui::AbstractViewItem &item);
bool UI_view_item_drag_start(bContext &C, const blender::ui::AbstractViewItem &item);

blender::ui::AbstractView *UI_region_view_find_at(const ARegion *region, const int xy[2], int pad);
blender::ui::AbstractViewItem *UI_region_views_find_item_at(const ARegion &region,
                                                            const int xy[2]);
blender::ui::AbstractViewItem *UI_region_views_find_active_item(const ARegion *region);
uiBut *UI_region_views_find_active_item_but(const ARegion *region);
void UI_region_views_clear_search_highlight(const ARegion *region);