234 lines
9.0 KiB
C
234 lines
9.0 KiB
C
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup bke
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*
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* \warning All paths manipulated by this API are assumed to be either constant char buffers of
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* `FILE_MAX` size, or allocated char buffers not bigger than `FILE_MAX`.
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*/
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/* TODO: Make this module handle a bit more safely string length, instead of assuming buffers are
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* FILE_MAX length etc. */
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#pragma once
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#include "BLI_utildefines.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct ID;
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struct Main;
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struct ReportList;
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/** \name Core `foreach_path` API.
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* \{ */
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typedef enum eBPathForeachFlag {
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/* Flags controlling the behavior of the generic BPath API. */
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/**
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* Ensures the `absolute_base_path` member of #BPathForeachPathData is initialized properly with
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* the path of the current .blend file. This can be used by the callbacks to convert relative
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* paths to absolute ones.
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*/
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BKE_BPATH_FOREACH_PATH_ABSOLUTE = (1 << 0),
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/** Skip paths of linked IDs. */
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BKE_BPATH_FOREACH_PATH_SKIP_LINKED = (1 << 1),
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/** Skip paths when their matching data is packed. */
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BKE_BPATH_FOREACH_PATH_SKIP_PACKED = (1 << 2),
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/** Resolve tokens within a virtual filepath to a single, concrete, filepath. */
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BKE_BPATH_FOREACH_PATH_RESOLVE_TOKEN = (1 << 3),
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/* Skip weak reference paths. Those paths are typically 'nice to have' extra information, but are
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* not used as actual source of data by the current .blend file.
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*
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* NOTE: Currently this only concerns the weak reference to a library file stored in
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* `ID::library_weak_reference`. */
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BKE_BPATH_TRAVERSE_SKIP_WEAK_REFERENCES = (1 << 5),
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/** Flags not affecting the generic BPath API. Those may be used by specific IDTypeInfo
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* `foreach_path` implementations and/or callbacks to implement specific behaviors. */
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/** Skip paths where a single dir is used with an array of files, eg. sequence strip images or
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* point-caches. In this case only use the first file path is processed.
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*
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* This is needed for directory manipulation callbacks which might otherwise modify the same
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* directory multiple times. */
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BKE_BPATH_FOREACH_PATH_SKIP_MULTIFILE = (1 << 8),
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/**
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* Reload data (when the path is edited).
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* \note Only used by Image #IDType currently.
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*/
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BKE_BPATH_FOREACH_PATH_RELOAD_EDITED = (1 << 9),
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} eBPathForeachFlag;
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ENUM_OPERATORS(eBPathForeachFlag, BKE_BPATH_FOREACH_PATH_RELOAD_EDITED)
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struct BPathForeachPathData;
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/**
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* Callback used to iterate over an ID's file paths.
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* \param path_dst: Optionally write to the path (for callbacks that manipulate the path).
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* \note When #BKE_BPATH_FOREACH_PATH_ABSOLUTE us used, `path_src` will be absolute and `path_dst`
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* can be used to access the original path.
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* \param path_dst_maxncpy: The buffer size of `path_dst` including the null byte.
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* \warning Actions such as #BLI_path_abs & #BLI_path_rel must not be called directly
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* on `path_dst` as they assume #FILE_MAX size which may not be the case.
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*
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* \return `true` if the path has been changed, and in that case,
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* result must be written to `path_dst`.
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*/
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typedef bool (*BPathForeachPathFunctionCallback)(struct BPathForeachPathData *bpath_data,
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char *path_dst,
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size_t path_dst_maxncpy,
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const char *path_src);
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/** Storage for common data needed across the BPath 'foreach_path' code. */
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typedef struct BPathForeachPathData {
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struct Main *bmain;
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BPathForeachPathFunctionCallback callback_function;
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eBPathForeachFlag flag;
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void *user_data;
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/* 'Private' data, caller don't need to set those. */
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/** The root to use as base for relative paths. Only set if `BKE_BPATH_FOREACH_PATH_ABSOLUTE`
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* flag is set, NULL otherwise. */
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const char *absolute_base_path;
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/** ID owning the path being processed. */
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struct ID *owner_id;
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/**
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* IDTypeInfo callbacks are responsible to set this boolean if they modified one or more paths.
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*/
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bool is_path_modified;
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} BPathForeachPathData;
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/** Run `bpath_data.callback_function` on all paths contained in `id`. */
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void BKE_bpath_foreach_path_id(BPathForeachPathData *bpath_data, struct ID *id);
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/** Run `bpath_data.callback_function` on all paths of all IDs in `bmain`. */
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void BKE_bpath_foreach_path_main(BPathForeachPathData *bpath_data);
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/** \} */
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/** \name Helpers to handle common cases from `IDTypeInfo`'s `foreach_path` functions.
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* \{ */
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/* TODO: Investigate using macros around those calls to check a bit better about actual
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* strings/buffers length (e,g, with static asserts). */
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/**
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* Run the callback on a path, replacing the content of the string as needed.
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*
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* \param path: A fixed, FILE_MAX-sized char buffer.
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*
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* \return true is \a path was modified, false otherwise.
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*/
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bool BKE_bpath_foreach_path_fixed_process(struct BPathForeachPathData *bpath_data,
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char *path,
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size_t path_maxncpy);
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/**
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* Run the callback on a (directory + file) path, replacing the content of the two strings as
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* needed.
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*
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* \param path_dir: A fixed, FILE_MAXDIR-sized char buffer.
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* \param path_file: A fixed, FILE_MAXFILE-sized char buffer.
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*
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* \return true is \a path_dir and/or \a path_file were modified, false otherwise.
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*/
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bool BKE_bpath_foreach_path_dirfile_fixed_process(struct BPathForeachPathData *bpath_data,
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char *path_dir,
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size_t path_dir_maxncpy,
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char *path_file,
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size_t path_file_maxncpy);
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/**
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* Run the callback on a path, replacing the content of the string as needed.
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*
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* \param path: A pointer to a MEM-allocated string. If modified, it will be freed and replaced by
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* a new allocated string.
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* \note path is expected to be FILE_MAX size or smaller.
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*
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* \return true is \a path was modified and re-allocated, false otherwise.
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*/
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bool BKE_bpath_foreach_path_allocated_process(struct BPathForeachPathData *bpath_data,
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char **path);
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/** \} */
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/** \name High level features.
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* \{ */
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/** Check for missing files. */
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void BKE_bpath_missing_files_check(struct Main *bmain, struct ReportList *reports);
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/**
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* Recursively search into given search directory, for all file paths of all IDs in given
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* \a bmain, and replace existing paths as needed.
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*
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* \note The search will happen into the whole search directory tree recursively (with a limit of
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* MAX_DIR_RECURSE), if several files are found matching a searched filename, the biggest one will
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* be used. This is so that things like thumbnails don't get selected instead of the actual image
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* e.g.
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*
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* \param searchpath: The root directory in which the new filepaths should be searched for.
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* \param find_all: If `true`, also search for files which current path is still valid, if `false`
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* skip those still valid paths.
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*/
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void BKE_bpath_missing_files_find(struct Main *bmain,
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const char *searchpath,
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struct ReportList *reports,
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bool find_all);
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/** Rebase all relative file paths in given \a bmain from \a basedir_src to \a basedir_dst. */
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void BKE_bpath_relative_rebase(struct Main *bmain,
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const char *basedir_src,
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const char *basedir_dst,
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struct ReportList *reports);
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/** Make all absolute file paths in given \a bmain relative to given \a basedir. */
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void BKE_bpath_relative_convert(struct Main *bmain,
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const char *basedir,
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struct ReportList *reports);
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/** Make all relative file paths in given \a bmain absolute, using given \a basedir as root. */
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void BKE_bpath_absolute_convert(struct Main *bmain,
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const char *basedir,
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struct ReportList *reports);
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/**
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* Temp backup of paths from all IDs in given \a bmain.
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*
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* \return An opaque handle to pass to #BKE_bpath_list_restore and #BKE_bpath_list_free.
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*/
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void *BKE_bpath_list_backup(struct Main *bmain, eBPathForeachFlag flag);
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/**
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* Restore the temp backup of paths from \a path_list_handle into all IDs in given \a bmain.
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*
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* \note This function assumes that the data in given Main did not change (no
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* addition/deletion/re-ordering of IDs, or their file paths) since the call to
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* #BKE_bpath_list_backup that generated the given \a path_list_handle.
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*/
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void BKE_bpath_list_restore(struct Main *bmain, eBPathForeachFlag flag, void *path_list_handle);
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/**
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* Free the temp backup of paths in \a path_list_handle.
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*
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* \note This function assumes that the path list has already been restored with a call to
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* #BKE_bpath_list_restore, and is therefore empty.
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*/
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void BKE_bpath_list_free(void *path_list_handle);
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/** \} */
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#ifdef __cplusplus
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}
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#endif
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