e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
150 lines
3.8 KiB
C++
150 lines
3.8 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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* Blend file undo (known as 'Global Undo').
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* DNA level diffing for undo.
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*/
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#ifndef _WIN32
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# include <unistd.h> /* for read close */
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#else
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# include <io.h> /* for open close read */
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#endif
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#include <cerrno>
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#include <cstddef>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <fcntl.h> /* for open */
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#include "MEM_guardedalloc.h"
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#include "DNA_scene_types.h"
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#include "BLI_path_util.h"
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#include "BLI_string.h"
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#include "BLI_utildefines.h"
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#include "BKE_appdir.h"
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#include "BKE_blender_undo.h" /* own include */
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#include "BKE_blendfile.h"
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#include "BKE_context.h"
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#include "BKE_global.h"
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#include "BKE_main.h"
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#include "BKE_undo_system.h"
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#include "BLO_readfile.h"
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#include "BLO_undofile.h"
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#include "BLO_writefile.h"
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#include "DEG_depsgraph.h"
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/* -------------------------------------------------------------------- */
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/** \name Global Undo
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* \{ */
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#define UNDO_DISK 0
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bool BKE_memfile_undo_decode(MemFileUndoData *mfu,
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const eUndoStepDir undo_direction,
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const bool use_old_bmain_data,
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bContext *C)
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{
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Main *bmain = CTX_data_main(C);
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char mainstr[sizeof(bmain->filepath)];
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int success = 0, fileflags;
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STRNCPY(mainstr, BKE_main_blendfile_path(bmain)); /* temporal store */
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fileflags = G.fileflags;
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G.fileflags |= G_FILE_NO_UI;
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if (UNDO_DISK) {
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const BlendFileReadParams params{};
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BlendFileReadReport bf_reports{};
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BlendFileData *bfd = BKE_blendfile_read(mfu->filepath, ¶ms, &bf_reports);
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if (bfd != nullptr) {
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BKE_blendfile_read_setup_undo(C, bfd, ¶ms, &bf_reports);
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success = true;
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}
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}
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else {
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BlendFileReadParams params = {0};
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params.undo_direction = undo_direction;
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if (!use_old_bmain_data) {
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params.skip_flags |= BLO_READ_SKIP_UNDO_OLD_MAIN;
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}
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BlendFileReadReport blend_file_read_report{};
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BlendFileData *bfd = BKE_blendfile_read_from_memfile(bmain, &mfu->memfile, ¶ms, nullptr);
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if (bfd != nullptr) {
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BKE_blendfile_read_setup_undo(C, bfd, ¶ms, &blend_file_read_report);
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success = true;
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}
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}
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/* Restore, bmain has been re-allocated. */
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bmain = CTX_data_main(C);
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STRNCPY(bmain->filepath, mainstr);
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G.fileflags = fileflags;
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if (success) {
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/* important not to update time here, else non keyed transforms are lost */
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DEG_tag_on_visible_update(bmain, false);
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}
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return success;
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}
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MemFileUndoData *BKE_memfile_undo_encode(Main *bmain, MemFileUndoData *mfu_prev)
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{
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MemFileUndoData *mfu = MEM_cnew<MemFileUndoData>(__func__);
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/* Include recovery information since undo-data is written out as #BLENDER_QUIT_FILE. */
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const int fileflags = G.fileflags | G_FILE_RECOVER_WRITE;
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/* disk save version */
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if (UNDO_DISK) {
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static int counter = 0;
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char filepath[FILE_MAX];
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char numstr[32];
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/* Calculate current filepath. */
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counter++;
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counter = counter % U.undosteps;
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SNPRINTF(numstr, "%d.blend", counter);
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BLI_path_join(filepath, sizeof(filepath), BKE_tempdir_session(), numstr);
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const BlendFileWriteParams blend_file_write_params{};
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/* success = */ /* UNUSED */ BLO_write_file(
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bmain, filepath, fileflags, &blend_file_write_params, nullptr);
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STRNCPY(mfu->filepath, filepath);
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}
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else {
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MemFile *prevfile = (mfu_prev) ? &(mfu_prev->memfile) : nullptr;
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if (prevfile) {
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BLO_memfile_clear_future(prevfile);
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}
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/* success = */ /* UNUSED */ BLO_write_file_mem(bmain, prevfile, &mfu->memfile, fileflags);
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mfu->undo_size = mfu->memfile.size;
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}
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bmain->is_memfile_undo_written = true;
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return mfu;
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}
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void BKE_memfile_undo_free(MemFileUndoData *mfu)
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{
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BLO_memfile_free(&mfu->memfile);
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MEM_freeN(mfu);
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}
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/** \} */
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