wm_files.c

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version. 
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * Contributor(s): Blender Foundation 2007
 *
 * ***** END GPL LICENSE BLOCK *****
 */

    /* placed up here because of crappy
     * winsock stuff.
     */
#include <stddef.h>
#include <string.h>
#include <errno.h>

#include "zlib.h" /* wm_read_exotic() */

#ifdef WIN32
#include <windows.h> /* need to include windows.h so _WIN32_IE is defined  */
#ifndef _WIN32_IE
#define _WIN32_IE 0x0400 /* minimal requirements for SHGetSpecialFolderPath on MINGW MSVC has this defined already */
#endif
#include <shlobj.h> /* for SHGetSpecialFolderPath, has to be done before BLI_winstuff because 'near' is disabled through BLI_windstuff */
#include <process.h> /* getpid */
#include "BLI_winstuff.h"
#else
#include <unistd.h> /* getpid */
#endif

#include "MEM_guardedalloc.h"
#include "MEM_CacheLimiterC-Api.h"

#include "BLI_blenlib.h"
#include "BLI_linklist.h"
#include "BLI_utildefines.h"
#include "BLI_callbacks.h"

#include "BLF_translation.h"

#include "DNA_anim_types.h"
#include "DNA_ipo_types.h" // XXX old animation system
#include "DNA_object_types.h"
#include "DNA_space_types.h"
#include "DNA_userdef_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_windowmanager_types.h"

#include "BKE_blender.h"
#include "BKE_context.h"
#include "BKE_depsgraph.h"
#include "BKE_DerivedMesh.h"
#include "BKE_font.h"
#include "BKE_global.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_packedFile.h"
#include "BKE_report.h"
#include "BKE_sound.h"
#include "BKE_texture.h"


#include "BLO_readfile.h"
#include "BLO_writefile.h"

#include "RNA_access.h"

#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "IMB_thumbs.h"

#include "ED_datafiles.h"
#include "ED_object.h"
#include "ED_screen.h"
#include "ED_sculpt.h"
#include "ED_view3d.h"
#include "ED_util.h"

#include "RE_pipeline.h" /* only to report missing engine */

#include "GHOST_C-api.h"
#include "GHOST_Path-api.h"

#include "UI_interface.h"

#include "GPU_draw.h"

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

#include "WM_api.h"
#include "WM_types.h"
#include "wm.h"
#include "wm_files.h"
#include "wm_window.h"
#include "wm_event_system.h"

static void write_history(void);

/* To be able to read files without windows closing, opening, moving 
   we try to prepare for worst case:
   - active window gets active screen from file 
   - restoring the screens from non-active windows 
   Best case is all screens match, in that case they get assigned to proper window  
*/
static void wm_window_match_init(bContext *C, ListBase *wmlist)
{
    wmWindowManager *wm;
    wmWindow *win, *active_win;
    
    *wmlist= G.main->wm;
    G.main->wm.first= G.main->wm.last= NULL;
    
    active_win = CTX_wm_window(C);

    /* first wrap up running stuff */
    /* code copied from wm_init_exit.c */
    for(wm= wmlist->first; wm; wm= wm->id.next) {
        
        WM_jobs_stop_all(wm);
        
        for(win= wm->windows.first; win; win= win->next) {
        
            CTX_wm_window_set(C, win);  /* needed by operator close callbacks */
            WM_event_remove_handlers(C, &win->handlers);
            WM_event_remove_handlers(C, &win->modalhandlers);
            ED_screen_exit(C, win, win->screen);
        }
    }
    
    /* reset active window */
    CTX_wm_window_set(C, active_win);

    ED_editors_exit(C);

    /* just had return; here from r12991, this code could just get removed?*/
#if 0
    if(wm==NULL) return;
    if(G.fileflags & G_FILE_NO_UI) return;
    
    /* we take apart the used screens from non-active window */
    for(win= wm->windows.first; win; win= win->next) {
        BLI_strncpy(win->screenname, win->screen->id.name, MAX_ID_NAME);
        if(win!=wm->winactive) {
            BLI_remlink(&G.main->screen, win->screen);
            //BLI_addtail(screenbase, win->screen);
        }
    }
#endif
}

/* match old WM with new, 4 cases:
  1- no current wm, no read wm: make new default
  2- no current wm, but read wm: that's OK, do nothing
  3- current wm, but not in file: try match screen names
  4- current wm, and wm in file: try match ghostwin 
*/

static void wm_window_match_do(bContext *C, ListBase *oldwmlist)
{
    wmWindowManager *oldwm, *wm;
    wmWindow *oldwin, *win;
    
    /* cases 1 and 2 */
    if(oldwmlist->first==NULL) {
        if(G.main->wm.first); /* nothing todo */
        else
            wm_add_default(C);
    }
    else {
        /* cases 3 and 4 */
        
        /* we've read file without wm..., keep current one entirely alive */
        if(G.main->wm.first==NULL) {
            bScreen *screen= NULL;

            /* when loading without UI, no matching needed */
            if(!(G.fileflags & G_FILE_NO_UI) && (screen= CTX_wm_screen(C))) {

                /* match oldwm to new dbase, only old files */
                for(wm= oldwmlist->first; wm; wm= wm->id.next) {
                    
                    for(win= wm->windows.first; win; win= win->next) {
                        /* all windows get active screen from file */
                        if(screen->winid==0)
                            win->screen= screen;
                        else 
                            win->screen= ED_screen_duplicate(win, screen);
                        
                        BLI_strncpy(win->screenname, win->screen->id.name+2, sizeof(win->screenname));
                        win->screen->winid= win->winid;
                    }
                }
            }
            
            G.main->wm= *oldwmlist;
            
            /* screens were read from file! */
            ED_screens_initialize(G.main->wm.first);
        }
        else {
            /* what if old was 3, and loaded 1? */
            /* this code could move to setup_appdata */
            oldwm= oldwmlist->first;
            wm= G.main->wm.first;

            /* preserve key configurations in new wm, to preserve their keymaps */
            wm->keyconfigs= oldwm->keyconfigs;
            wm->addonconf= oldwm->addonconf;
            wm->defaultconf= oldwm->defaultconf;
            wm->userconf= oldwm->userconf;

            oldwm->keyconfigs.first= oldwm->keyconfigs.last= NULL;
            oldwm->addonconf= NULL;
            oldwm->defaultconf= NULL;
            oldwm->userconf= NULL;

            /* ensure making new keymaps and set space types */
            wm->initialized= 0;
            wm->winactive= NULL;
            
            /* only first wm in list has ghostwins */
            for(win= wm->windows.first; win; win= win->next) {
                for(oldwin= oldwm->windows.first; oldwin; oldwin= oldwin->next) {
                    
                    if(oldwin->winid == win->winid ) {
                        win->ghostwin= oldwin->ghostwin;
                        win->active= oldwin->active;
                        if(win->active)
                            wm->winactive= win;

                        if(!G.background) /* file loading in background mode still calls this */
                            GHOST_SetWindowUserData(win->ghostwin, win);    /* pointer back */

                        oldwin->ghostwin= NULL;
                        
                        win->eventstate= oldwin->eventstate;
                        oldwin->eventstate= NULL;
                        
                        /* ensure proper screen rescaling */
                        win->sizex= oldwin->sizex;
                        win->sizey= oldwin->sizey;
                        win->posx= oldwin->posx;
                        win->posy= oldwin->posy;
                    }
                }
            }
            wm_close_and_free_all(C, oldwmlist);
        }
    }
}

/* in case UserDef was read, we re-initialize all, and do versioning */
static void wm_init_userdef(bContext *C)
{
    UI_init_userdef();
    MEM_CacheLimiter_set_maximum(U.memcachelimit * 1024 * 1024);
    sound_init(CTX_data_main(C));

    /* needed so loading a file from the command line respects user-pref [#26156] */
    if(U.flag & USER_FILENOUI)  G.fileflags |= G_FILE_NO_UI;
    else                        G.fileflags &= ~G_FILE_NO_UI;

    /* set the python auto-execute setting from user prefs */
    /* enabled by default, unless explicitly enabled in the command line which overrides */
    if((G.f & G_SCRIPT_OVERRIDE_PREF) == 0) {
        if ((U.flag & USER_SCRIPT_AUTOEXEC_DISABLE) == 0) G.f |=  G_SCRIPT_AUTOEXEC;
        else                                              G.f &= ~G_SCRIPT_AUTOEXEC;
    }

    /* update tempdir from user preferences */
    BLI_init_temporary_dir(U.tempdir);
}



/* return codes */
#define BKE_READ_EXOTIC_FAIL_PATH       -3 /* file format is not supported */
#define BKE_READ_EXOTIC_FAIL_FORMAT     -2 /* file format is not supported */
#define BKE_READ_EXOTIC_FAIL_OPEN       -1 /* Can't open the file */
#define BKE_READ_EXOTIC_OK_BLEND         0 /* .blend file */
#define BKE_READ_EXOTIC_OK_OTHER         1 /* other supported formats */

/* intended to check for non-blender formats but for now it only reads blends */
static int wm_read_exotic(Scene *UNUSED(scene), const char *name)
{
    int len;
    gzFile gzfile;
    char header[7];
    int retval;

    // make sure we're not trying to read a directory....

    len= strlen(name);
    if (ELEM(name[len-1], '/', '\\')) {
        retval= BKE_READ_EXOTIC_FAIL_PATH;
    }
    else {
        gzfile = gzopen(name,"rb");

        if (gzfile == NULL) {
            retval= BKE_READ_EXOTIC_FAIL_OPEN;
        }
        else {
            len= gzread(gzfile, header, sizeof(header));
            gzclose(gzfile);
            if (len == sizeof(header) && strncmp(header, "BLENDER", 7) == 0) {
                retval= BKE_READ_EXOTIC_OK_BLEND;
            }
            else {
                //XXX waitcursor(1);
                /*
                if(is_foo_format(name)) {
                    read_foo(name);
                    retval= BKE_READ_EXOTIC_OK_OTHER;
                }
                else
                 */
                {
                    retval= BKE_READ_EXOTIC_FAIL_FORMAT;
                }
                //XXX waitcursor(0);
            }
        }
    }

    return retval;
}

void WM_read_file(bContext *C, const char *filepath, ReportList *reports)
{
    int retval;

    /* so we can get the error message */
    errno = 0;

    WM_cursor_wait(1);

    BLI_exec_cb(CTX_data_main(C), NULL, BLI_CB_EVT_LOAD_PRE);

    /* first try to append data from exotic file formats... */
    /* it throws error box when file doesn't exist and returns -1 */
    /* note; it should set some error message somewhere... (ton) */
    retval= wm_read_exotic(CTX_data_scene(C), filepath);
    
    /* we didn't succeed, now try to read Blender file */
    if (retval == BKE_READ_EXOTIC_OK_BLEND) {
        int G_f= G.f;
        ListBase wmbase;

        /* put aside screens to match with persistent windows later */
        /* also exit screens and editors */
        wm_window_match_init(C, &wmbase); 
        
        retval= BKE_read_file(C, filepath, reports);
        G.save_over = 1;

        /* this flag is initialized by the operator but overwritten on read.
         * need to re-enable it here else drivers + registered scripts wont work. */
        if(G.f != G_f) {
            const int flags_keep= (G_SCRIPT_AUTOEXEC | G_SCRIPT_OVERRIDE_PREF);
            G.f= (G.f & ~flags_keep) | (G_f & flags_keep);
        }

        /* match the read WM with current WM */
        wm_window_match_do(C, &wmbase);
        WM_check(C); /* opens window(s), checks keymaps */
        
// XXX      mainwindow_set_filename_to_title(G.main->name);

        if(retval == BKE_READ_FILE_OK_USERPREFS) wm_init_userdef(C);    // in case a userdef is read from regular .blend
        
        if (retval != BKE_READ_FILE_FAIL) {
            G.relbase_valid = 1;
            if(!G.background) /* assume automated tasks with background, dont write recent file list */
                write_history();
        }


        WM_event_add_notifier(C, NC_WM|ND_FILEREAD, NULL);
//      refresh_interface_font();

        CTX_wm_window_set(C, CTX_wm_manager(C)->windows.first);

        ED_editors_init(C);
        DAG_on_visible_update(CTX_data_main(C), TRUE);

#ifdef WITH_PYTHON
        /* run any texts that were loaded in and flagged as modules */
        BPY_driver_reset();
        BPY_app_handlers_reset(FALSE);
        BPY_modules_load_user(C);
#endif

        /* important to do before NULL'ing the context */
        BLI_exec_cb(CTX_data_main(C), NULL, BLI_CB_EVT_LOAD_POST);

        CTX_wm_window_set(C, NULL); /* exits queues */

#if 0   /* gives popups on windows but not linux, bug in report API but disable for now to stop users getting annoyed  */
        /* TODO, make this show in header info window */
        {
            Scene *sce;
            for(sce= G.main->scene.first; sce; sce= sce->id.next) {
                if(sce->r.engine[0] && BLI_findstring(&R_engines, sce->r.engine, offsetof(RenderEngineType, idname)) == NULL) {
                    BKE_reportf(reports, RPT_WARNING, "Engine not available: '%s' for scene: %s, an addon may need to be installed or enabled", sce->r.engine, sce->id.name+2);
                }
            }
        }
#endif

        // XXX      undo_editmode_clear();
        BKE_reset_undo();
        BKE_write_undo(C, "original");  /* save current state */
    }
    else if(retval == BKE_READ_EXOTIC_OK_OTHER)
        BKE_write_undo(C, "Import file");
    else if(retval == BKE_READ_EXOTIC_FAIL_OPEN) {
        BKE_reportf(reports, RPT_ERROR, IFACE_("Can't read file: \"%s\", %s."), filepath,
                errno ? strerror(errno) : IFACE_("Unable to open the file"));
    }
    else if(retval == BKE_READ_EXOTIC_FAIL_FORMAT) {
        BKE_reportf(reports, RPT_ERROR, IFACE_("File format is not supported in file: \"%s\"."), filepath);
    }
    else if(retval == BKE_READ_EXOTIC_FAIL_PATH) {
        BKE_reportf(reports, RPT_ERROR, IFACE_("File path invalid: \"%s\"."), filepath);
    }
    else {
        BKE_reportf(reports, RPT_ERROR, IFACE_("Unknown error loading: \"%s\"."), filepath);
        BLI_assert(!"invalid 'retval'");
    }

    WM_cursor_wait(0);

}


/* called on startup,  (context entirely filled with NULLs) */
/* or called for 'New File' */
/* op can be NULL */
int WM_read_homefile(bContext *C, ReportList *UNUSED(reports), short from_memory)
{
    ListBase wmbase;
    char tstr[FILE_MAX];
    int success= 0;
    
    free_ttfont(); /* still weird... what does it here? */
        
    G.relbase_valid = 0;
    if (!from_memory) {
        char *cfgdir = BLI_get_folder(BLENDER_USER_CONFIG, NULL);
        if (cfgdir) {
            BLI_make_file_string(G.main->name, tstr, cfgdir, BLENDER_STARTUP_FILE);
        } else {
            tstr[0] = '\0';
            from_memory = 1;
        }
    }
    
    /* prevent loading no UI */
    G.fileflags &= ~G_FILE_NO_UI;
    
    /* put aside screens to match with persistent windows later */
    wm_window_match_init(C, &wmbase); 
    
    if (!from_memory && BLI_exists(tstr)) {
        success = (BKE_read_file(C, tstr, NULL) != BKE_READ_FILE_FAIL);
        
        if(U.themes.first==NULL) {
            printf("\nError: No valid "STRINGIFY(BLENDER_STARTUP_FILE)", fall back to built-in default.\n\n");
            success = 0;
        }
    }
    if(success==0) {
        success = BKE_read_file_from_memory(C, datatoc_startup_blend, datatoc_startup_blend_size, NULL);
        if (wmbase.first == NULL) wm_clear_default_size(C);

#ifdef WITH_PYTHON_SECURITY /* not default */
        /* use alternative setting for security nuts
         * otherwise we'd need to patch the binary blob - startup.blend.c */
        U.flag |= USER_SCRIPT_AUTOEXEC_DISABLE;
#endif
    }
    
    /* prevent buggy files that had G_FILE_RELATIVE_REMAP written out by mistake. Screws up autosaves otherwise
     * can remove this eventually, only in a 2.53 and older, now its not written */
    G.fileflags &= ~G_FILE_RELATIVE_REMAP;
    
    /* check userdef before open window, keymaps etc */
    wm_init_userdef(C);
    
    /* match the read WM with current WM */
    wm_window_match_do(C, &wmbase); 
    WM_check(C); /* opens window(s), checks keymaps */

    G.main->name[0]= '\0';

    /* When loading factory settings, the reset solid OpenGL lights need to be applied. */
    if (!G.background) GPU_default_lights();
    
    /* XXX */
    G.save_over = 0;    // start with save preference untitled.blend
    G.fileflags &= ~G_FILE_AUTOPLAY;    /*  disable autoplay in startup.blend... */
//  mainwindow_set_filename_to_title("");   // empty string re-initializes title to "Blender"
    
//  refresh_interface_font();
    
//  undo_editmode_clear();
    BKE_reset_undo();
    BKE_write_undo(C, "original");  /* save current state */

    ED_editors_init(C);
    DAG_on_visible_update(CTX_data_main(C), TRUE);

#ifdef WITH_PYTHON
    if(CTX_py_init_get(C)) {
        /* sync addons, these may have changed from the defaults */
        BPY_string_exec(C, "__import__('addon_utils').reset_all()");

        BPY_driver_reset();
        BPY_app_handlers_reset(FALSE);
        BPY_modules_load_user(C);
    }
#endif

    WM_event_add_notifier(C, NC_WM|ND_FILEREAD, NULL);

    /* in background mode the scene will stay NULL */
    if(!G.background) {
        CTX_wm_window_set(C, NULL); /* exits queues */
    }

    return TRUE;
}

int WM_read_homefile_exec(bContext *C, wmOperator *op)
{
    int from_memory= strcmp(op->type->idname, "WM_OT_read_factory_settings") == 0;
    return WM_read_homefile(C, op->reports, from_memory) ? OPERATOR_FINISHED : OPERATOR_CANCELLED;
}

void WM_read_history(void)
{
    char name[FILE_MAX];
    LinkNode *l, *lines;
    struct RecentFile *recent;
    char *line;
    int num;
    char *cfgdir = BLI_get_folder(BLENDER_USER_CONFIG, NULL);

    if (!cfgdir) return;

    BLI_make_file_string("/", name, cfgdir, BLENDER_HISTORY_FILE);

    lines= BLI_file_read_as_lines(name);

    G.recent_files.first = G.recent_files.last = NULL;

    /* read list of recent opened files from recent-files.txt to memory */
    for (l= lines, num= 0; l && (num<U.recent_files); l= l->next) {
        line = l->link;
        if (line[0] && BLI_exists(line)) {
            recent = (RecentFile*)MEM_mallocN(sizeof(RecentFile),"RecentFile");
            BLI_addtail(&(G.recent_files), recent);
            recent->filepath = BLI_strdup(line);
            num++;
        }
    }
    
    BLI_file_free_lines(lines);

}

static void write_history(void)
{
    struct RecentFile *recent, *next_recent;
    char name[FILE_MAX];
    char *user_config_dir;
    FILE *fp;
    int i;

    /* will be NULL in background mode */
    user_config_dir = BLI_get_folder_create(BLENDER_USER_CONFIG, NULL);
    if(!user_config_dir)
        return;

    BLI_make_file_string("/", name, user_config_dir, BLENDER_HISTORY_FILE);

    recent = G.recent_files.first;
    /* refresh recent-files.txt of recent opened files, when current file was changed */
    if(!(recent) || (BLI_path_cmp(recent->filepath, G.main->name)!=0)) {
        fp= fopen(name, "w");
        if (fp) {
            /* add current file to the beginning of list */
            recent = (RecentFile*)MEM_mallocN(sizeof(RecentFile),"RecentFile");
            recent->filepath = BLI_strdup(G.main->name);
            BLI_addhead(&(G.recent_files), recent);
            /* write current file to recent-files.txt */
            fprintf(fp, "%s\n", recent->filepath);
            recent = recent->next;
            i=1;
            /* write rest of recent opened files to recent-files.txt */
            while((i<U.recent_files) && (recent)){
                /* this prevents to have duplicities in list */
                if (BLI_path_cmp(recent->filepath, G.main->name)!=0) {
                    fprintf(fp, "%s\n", recent->filepath);
                    recent = recent->next;
                }
                else {
                    next_recent = recent->next;
                    MEM_freeN(recent->filepath);
                    BLI_freelinkN(&(G.recent_files), recent);
                    recent = next_recent;
                }
                i++;
            }
            fclose(fp);
        }

        /* also update most recent files on System */
        GHOST_addToSystemRecentFiles(G.main->name);
    }
}

static ImBuf *blend_file_thumb(Scene *scene, int **thumb_pt)
{
    /* will be scaled down, but gives some nice oversampling */
    ImBuf *ibuf;
    int *thumb;
    char err_out[256]= "unknown";

    *thumb_pt= NULL;

    /* scene can be NULL if running a script at startup and calling the save operator */
    if(G.background || scene==NULL || scene->camera==NULL)
        return NULL;

    /* gets scaled to BLEN_THUMB_SIZE */
    ibuf= ED_view3d_draw_offscreen_imbuf_simple(scene, scene->camera, BLEN_THUMB_SIZE * 2, BLEN_THUMB_SIZE * 2, IB_rect, OB_SOLID, err_out);
    
    if(ibuf) {      
        float aspect= (scene->r.xsch*scene->r.xasp) / (scene->r.ysch*scene->r.yasp);

        /* dirty oversampling */
        IMB_scaleImBuf(ibuf, BLEN_THUMB_SIZE, BLEN_THUMB_SIZE);

        /* add pretty overlay */
        IMB_overlayblend_thumb(ibuf->rect, ibuf->x, ibuf->y, aspect);
        
        /* first write into thumb buffer */
        thumb= MEM_mallocN(((2 + (BLEN_THUMB_SIZE * BLEN_THUMB_SIZE))) * sizeof(int), "write_file thumb");

        thumb[0] = BLEN_THUMB_SIZE;
        thumb[1] = BLEN_THUMB_SIZE;

        memcpy(thumb + 2, ibuf->rect, BLEN_THUMB_SIZE * BLEN_THUMB_SIZE * sizeof(int));
    }
    else {
        /* '*thumb_pt' needs to stay NULL to prevent a bad thumbnail from being handled */
        fprintf(stderr, "blend_file_thumb failed to create thumbnail: %s\n", err_out);
        thumb= NULL;
    }
    
    /* must be freed by caller */
    *thumb_pt= thumb;
    
    return ibuf;
}

/* easy access from gdb */
int write_crash_blend(void)
{
    char path[FILE_MAX];
    int fileflags = G.fileflags & ~(G_FILE_HISTORY); /* don't do file history on crash file */

    BLI_strncpy(path, G.main->name, sizeof(path));
    BLI_replace_extension(path, sizeof(path), "_crash.blend");
    if(BLO_write_file(G.main, path, fileflags, NULL, NULL)) {
        printf("written: %s\n", path);
        return 1;
    }
    else {
        printf("failed: %s\n", path);
        return 0;
    }
}

int WM_write_file(bContext *C, const char *target, int fileflags, ReportList *reports, int copy)
{
    Library *li;
    int len;
    char filepath[FILE_MAX];

    int *thumb= NULL;
    ImBuf *ibuf_thumb= NULL;

    len = strlen(target);
    
    if (len == 0) {
        BKE_report(reports, RPT_ERROR, "Path is empty, cannot save");
        return -1;
    }

    if (len >= FILE_MAX) {
        BKE_report(reports, RPT_ERROR, "Path too long, cannot save");
        return -1;
    }
 
    BLI_strncpy(filepath, target, FILE_MAX);
    BLI_replace_extension(filepath, FILE_MAX, ".blend");
    /* dont use 'target' anymore */
    
    /* send the OnSave event */
    for (li= G.main->library.first; li; li= li->id.next) {
        if (BLI_path_cmp(li->filepath, filepath) == 0) {
            BKE_reportf(reports, RPT_ERROR, "Can't overwrite used library '%.240s'", filepath);
            return -1;
        }
    }

    /* blend file thumbnail */
    /* save before exit_editmode, otherwise derivedmeshes for shared data corrupt #27765) */
    if(U.flag & USER_SAVE_PREVIEWS) {
        ibuf_thumb= blend_file_thumb(CTX_data_scene(C), &thumb);
    }

    BLI_exec_cb(G.main, NULL, BLI_CB_EVT_SAVE_PRE);

    /* operator now handles overwrite checks */

    if (G.fileflags & G_AUTOPACK) {
        packAll(G.main, reports);
    }
    
    ED_object_exit_editmode(C, EM_DO_UNDO);
    ED_sculpt_force_update(C);

    /* don't forget not to return without! */
    WM_cursor_wait(1);
    
    fileflags |= G_FILE_HISTORY; /* write file history */

    if (BLO_write_file(CTX_data_main(C), filepath, fileflags, reports, thumb)) {
        if(!copy) {
            G.relbase_valid = 1;
            BLI_strncpy(G.main->name, filepath, sizeof(G.main->name));  /* is guaranteed current file */
    
            G.save_over = 1; /* disable untitled.blend convention */
        }

        if(fileflags & G_FILE_COMPRESS) G.fileflags |= G_FILE_COMPRESS;
        else G.fileflags &= ~G_FILE_COMPRESS;
        
        if(fileflags & G_FILE_AUTOPLAY) G.fileflags |= G_FILE_AUTOPLAY;
        else G.fileflags &= ~G_FILE_AUTOPLAY;

        /* prevent background mode scripts from clobbering history */
        if(!G.background) {
            write_history();
        }

        BLI_exec_cb(G.main, NULL, BLI_CB_EVT_SAVE_POST);

        /* run this function after because the file cant be written before the blend is */
        if (ibuf_thumb) {
            ibuf_thumb= IMB_thumb_create(filepath, THB_NORMAL, THB_SOURCE_BLEND, ibuf_thumb);
            IMB_freeImBuf(ibuf_thumb);
        }

        if(thumb) MEM_freeN(thumb);
    }
    else {
        if(ibuf_thumb) IMB_freeImBuf(ibuf_thumb);
        if(thumb) MEM_freeN(thumb);
        
        WM_cursor_wait(0);
        return -1;
    }

    WM_cursor_wait(0);
    
    return 0;
}

/* operator entry */
int WM_write_homefile(bContext *C, wmOperator *op)
{
    wmWindowManager *wm= CTX_wm_manager(C);
    wmWindow *win= CTX_wm_window(C);
    char filepath[FILE_MAX];
    int fileflags;

    /* check current window and close it if temp */
    if(win->screen->temp)
        wm_window_close(C, wm, win);
    
    /* update keymaps in user preferences */
    WM_keyconfig_update(wm);
    
    BLI_make_file_string("/", filepath, BLI_get_folder_create(BLENDER_USER_CONFIG, NULL), BLENDER_STARTUP_FILE);
    printf("trying to save homefile at %s ", filepath);
    
    /*  force save as regular blend file */
    fileflags = G.fileflags & ~(G_FILE_COMPRESS | G_FILE_AUTOPLAY | G_FILE_LOCK | G_FILE_SIGN | G_FILE_HISTORY);

    if(BLO_write_file(CTX_data_main(C), filepath, fileflags, op->reports, NULL) == 0) {
        printf("fail\n");
        return OPERATOR_CANCELLED;
    }
    
    printf("ok\n");

    G.save_over= 0;

    return OPERATOR_FINISHED;
}

/************************ autosave ****************************/

void wm_autosave_location(char *filepath)
{
    char pidstr[32];
#ifdef WIN32
    char *savedir;
#endif

    BLI_snprintf(pidstr, sizeof(pidstr), "%d.blend", abs(getpid()));

#ifdef WIN32
    /* XXX Need to investigate how to handle default location of '/tmp/'
     * This is a relative directory on Windows, and it may be
     * found. Example:
     * Blender installed on D:\ drive, D:\ drive has D:\tmp\
     * Now, BLI_exists() will find '/tmp/' exists, but
     * BLI_make_file_string will create string that has it most likely on C:\
     * through get_default_root().
     * If there is no C:\tmp autosave fails. */
    if (!BLI_exists(BLI_temporary_dir())) {
        savedir = BLI_get_folder_create(BLENDER_USER_AUTOSAVE, NULL);
        BLI_make_file_string("/", filepath, savedir, pidstr);
        return;
    }
#endif

    BLI_make_file_string("/", filepath, BLI_temporary_dir(), pidstr);
}

void WM_autosave_init(wmWindowManager *wm)
{
    wm_autosave_timer_ended(wm);

    if(U.flag & USER_AUTOSAVE)
        wm->autosavetimer= WM_event_add_timer(wm, NULL, TIMERAUTOSAVE, U.savetime*60.0);
}

void wm_autosave_timer(const bContext *C, wmWindowManager *wm, wmTimer *UNUSED(wt))
{
    wmWindow *win;
    wmEventHandler *handler;
    char filepath[FILE_MAX];
    int fileflags;

    WM_event_remove_timer(wm, NULL, wm->autosavetimer);

    /* if a modal operator is running, don't autosave, but try again in 10 seconds */
    for(win=wm->windows.first; win; win=win->next) {
        for(handler=win->modalhandlers.first; handler; handler=handler->next) {
            if(handler->op) {
                wm->autosavetimer= WM_event_add_timer(wm, NULL, TIMERAUTOSAVE, 10.0);
                return;
            }
        }
    }
    
    wm_autosave_location(filepath);

    /*  force save as regular blend file */
    fileflags = G.fileflags & ~(G_FILE_COMPRESS|G_FILE_AUTOPLAY |G_FILE_LOCK|G_FILE_SIGN|G_FILE_HISTORY);

    /* no error reporting to console */
    BLO_write_file(CTX_data_main(C), filepath, fileflags, NULL, NULL);

    /* do timer after file write, just in case file write takes a long time */
    wm->autosavetimer= WM_event_add_timer(wm, NULL, TIMERAUTOSAVE, U.savetime*60.0);
}

void wm_autosave_timer_ended(wmWindowManager *wm)
{
    if(wm->autosavetimer) {
        WM_event_remove_timer(wm, NULL, wm->autosavetimer);
        wm->autosavetimer= NULL;
    }
}

void wm_autosave_delete(void)
{
    char filename[FILE_MAX];
    
    wm_autosave_location(filename);

    if(BLI_exists(filename)) {
        char str[FILE_MAX];
        BLI_make_file_string("/", str, BLI_temporary_dir(), "quit.blend");

        /* if global undo; remove tempsave, otherwise rename */
        if(U.uiflag & USER_GLOBALUNDO) BLI_delete(filename, 0, 0);
        else BLI_rename(filename, str);
    }
}

void wm_autosave_read(bContext *C, ReportList *reports)
{
    char filename[FILE_MAX];

    wm_autosave_location(filename);
    WM_read_file(C, filename, reports);
}