wm_files.c

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/*
 * $Id: wm_files.c 39084 2011-08-05 20:45:26Z blendix $
 *
 * ***** 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 "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);
        
return; 
        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);
                }
        }
}

/* 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) {
                        /* when loading without UI, no matching needed */
                        if(!(G.fileflags & G_FILE_NO_UI)) {
                                bScreen *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;

                        /* move addon key configuration to new wm, to preserve their keymaps */
                        if(oldwm->addonconf) {
                                wm->addonconf= oldwm->addonconf;
                                BLI_remlink(&oldwm->keyconfigs, oldwm->addonconf);
                                oldwm->addonconf= NULL;
                                BLI_addtail(&wm->keyconfigs, wm->addonconf);
                        }

                        /* 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;
        }
        if(U.tempdir[0]) BLI_where_is_temp(btempdir, FILE_MAX, 1);
}



/* 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 doesnt 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 persistant 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();
                BPY_modules_load_user(C);
#endif
                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 */

                BLI_exec_cb(CTX_data_main(C), NULL, BLI_CB_EVT_LOAD_POST);
        }
        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, "Can't read file: \"%s\", %s.", filepath, errno ? strerror(errno) : "Unable to open the file");
        }
        else if(retval == BKE_READ_EXOTIC_FAIL_FORMAT) {
                BKE_reportf(reports, RPT_ERROR, "File format is not supported in file: \"%s\".", filepath);
        }
        else if(retval == BKE_READ_EXOTIC_FAIL_PATH) {
                BKE_reportf(reports, RPT_ERROR, "File path invalid: \"%s\".", filepath);
        }
        else {
                BKE_reportf(reports, RPT_ERROR, "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 *reports, short from_memory)
{
        ListBase wmbase;
        char tstr[FILE_MAXDIR+FILE_MAXFILE];
        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;
                        BKE_report(reports, RPT_INFO, "Config directory with "STRINGIFY(BLENDER_STARTUP_FILE)" file not found.");
                }
        }
        
        /* prevent loading no UI */
        G.fileflags &= ~G_FILE_NO_UI;
        
        /* put aside screens to match with persistant 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();
                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_read_file_as_lines(name);

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

        /* read list of recent opend 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_free_file_lines(lines);

}

static void write_history(void)
{
        struct RecentFile *recent, *next_recent;
        char name[FILE_MAXDIR+FILE_MAXFILE];
        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 '%.200s'", 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_MAXDIR+FILE_MAXFILE];
        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(U.tempdir)) {
                savedir = BLI_get_folder_create(BLENDER_USER_AUTOSAVE, NULL);
                BLI_make_file_string("/", filepath, savedir, pidstr);
                return;
        }
#endif
        
        BLI_make_file_string("/", filepath, U.tempdir, 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_MAXDIR+FILE_MAXFILE];
                BLI_make_file_string("/", str, U.tempdir, "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);
}