/*
 * ***** 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) 2008 Blender Foundation.
 * All rights reserved.
 *
 * 
 * Contributor(s): Blender Foundation
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/editors/space_file/space_file.c
 *  \ingroup spfile
 */

#include <string.h>
#include <stdio.h>

#include "MEM_guardedalloc.h"

#include "BIF_gl.h"

#include "BLI_blenlib.h"
#include "BLI_utildefines.h"
#include "BLI_fileops_types.h"


#include "BKE_appdir.h"
#include "BKE_context.h"
#include "BKE_screen.h"
#include "BKE_global.h"

#include "RNA_access.h"

#include "WM_api.h"
#include "WM_types.h"

#include "ED_space_api.h"
#include "ED_screen.h"
#include "ED_fileselect.h"

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

#include "UI_resources.h"
#include "UI_view2d.h"


#include "file_intern.h"    // own include
#include "fsmenu.h"
#include "filelist.h"

/* ******************** default callbacks for file space ***************** */

static SpaceLink *file_new(const bContext *UNUSED(C))
{
	ARegion *ar;
	SpaceFile *sfile;

	sfile = MEM_callocN(sizeof(SpaceFile), "initfile");
	sfile->spacetype = SPACE_FILE;

	/* header */
	ar = MEM_callocN(sizeof(ARegion), "header for file");
	BLI_addtail(&sfile->regionbase, ar);
	ar->regiontype = RGN_TYPE_HEADER;
	ar->alignment = RGN_ALIGN_TOP;

	/* Tools region */
	ar = MEM_callocN(sizeof(ARegion), "tools region for file");
	BLI_addtail(&sfile->regionbase, ar);
	ar->regiontype = RGN_TYPE_TOOLS;
	ar->alignment = RGN_ALIGN_LEFT;

	/* Tool props (aka operator) region */
	ar = MEM_callocN(sizeof(ARegion), "tool props region for file");
	BLI_addtail(&sfile->regionbase, ar);
	ar->regiontype = RGN_TYPE_TOOL_PROPS;
	ar->alignment = RGN_ALIGN_BOTTOM | RGN_SPLIT_PREV;

	/* ui list region */
	ar = MEM_callocN(sizeof(ARegion), "ui region for file");
	BLI_addtail(&sfile->regionbase, ar);
	ar->regiontype = RGN_TYPE_UI;
	ar->alignment = RGN_ALIGN_TOP;

	/* main region */
	ar = MEM_callocN(sizeof(ARegion), "main region for file");
	BLI_addtail(&sfile->regionbase, ar);
	ar->regiontype = RGN_TYPE_WINDOW;
	ar->v2d.scroll = (V2D_SCROLL_RIGHT | V2D_SCROLL_BOTTOM);
	ar->v2d.align = (V2D_ALIGN_NO_NEG_X | V2D_ALIGN_NO_POS_Y);
	ar->v2d.keepzoom = (V2D_LOCKZOOM_X | V2D_LOCKZOOM_Y | V2D_LIMITZOOM | V2D_KEEPASPECT);
	ar->v2d.keeptot = V2D_KEEPTOT_STRICT;
	ar->v2d.minzoom = ar->v2d.maxzoom = 1.0f;

	return (SpaceLink *)sfile;
}

/* not spacelink itself */
static void file_free(SpaceLink *sl)
{	
	SpaceFile *sfile = (SpaceFile *) sl;
	
	BLI_assert(sfile->previews_timer == NULL);

	if (sfile->files) {
		// XXXXX would need to do thumbnails_stop here, but no context available
		filelist_freelib(sfile->files);
		filelist_free(sfile->files);
		MEM_freeN(sfile->files);
		sfile->files = NULL;
	}

	if (sfile->folders_prev) {
		folderlist_free(sfile->folders_prev);
		MEM_freeN(sfile->folders_prev);
		sfile->folders_prev = NULL;
	}

	if (sfile->folders_next) {
		folderlist_free(sfile->folders_next);
		MEM_freeN(sfile->folders_next);
		sfile->folders_next = NULL;
	}

	if (sfile->params) {
		MEM_freeN(sfile->params);
		sfile->params = NULL;
	}

	if (sfile->layout) {
		MEM_freeN(sfile->layout);
		sfile->layout = NULL;
	}
}


/* spacetype; init callback, area size changes, screen set, etc */
static void file_init(wmWindowManager *UNUSED(wm), ScrArea *sa)
{
	SpaceFile *sfile = (SpaceFile *)sa->spacedata.first;

	/* refresh system directory list */
	fsmenu_refresh_system_category(ED_fsmenu_get());

	/* Update bookmarks 'valid' state.
	 * Done here, because it seems BLI_is_dir() can have huge impact on performances
	 * in some cases, on win systems... See T43684.
	 */
	fsmenu_refresh_bookmarks_status(ED_fsmenu_get());

	if (sfile->layout) sfile->layout->dirty = true;
}

static void file_exit(wmWindowManager *wm, ScrArea *sa)
{
	SpaceFile *sfile = (SpaceFile *)sa->spacedata.first;

	if (sfile->previews_timer) {
		WM_event_remove_timer_notifier(wm, NULL, sfile->previews_timer);
		sfile->previews_timer = NULL;
	}

	ED_fileselect_exit(wm, sa, sfile);
}

static SpaceLink *file_duplicate(SpaceLink *sl)
{
	SpaceFile *sfileo = (SpaceFile *)sl;
	SpaceFile *sfilen = MEM_dupallocN(sl);
	
	/* clear or remove stuff from old */
	sfilen->op = NULL; /* file window doesn't own operators */

	if (sfileo->params) {
		sfilen->files = filelist_new(sfileo->params->type);
		sfilen->params = MEM_dupallocN(sfileo->params);
		filelist_setdir(sfilen->files, sfilen->params->dir);
	}

	if (sfileo->folders_prev)
		sfilen->folders_prev = folderlist_duplicate(sfileo->folders_prev);

	if (sfileo->folders_next)
		sfilen->folders_next = folderlist_duplicate(sfileo->folders_next);
	
	if (sfileo->layout) {
		sfilen->layout = MEM_dupallocN(sfileo->layout);
	}
	return (SpaceLink *)sfilen;
}

static void file_refresh(const bContext *C, ScrArea *sa)
{
	wmWindowManager *wm = CTX_wm_manager(C);
	SpaceFile *sfile = CTX_wm_space_file(C);
	FileSelectParams *params = ED_fileselect_get_params(sfile);
	struct FSMenu *fsmenu = ED_fsmenu_get();

	if (!sfile->folders_prev) {
		sfile->folders_prev = folderlist_new();
	}
	if (!sfile->files) {
		sfile->files = filelist_new(params->type);
		params->highlight_file = -1; /* added this so it opens nicer (ton) */
	}
	filelist_setdir(sfile->files, params->dir);
	filelist_setrecursion(sfile->files, params->recursion_level);
	filelist_setsorting(sfile->files, params->sort);
	filelist_setfilter_options(sfile->files, (params->flag & FILE_HIDE_DOT) != 0,
	                                         false, /* TODO hide_parent, should be controllable? */
	                                         params->flag & FILE_FILTER ? params->filter : 0,
	                                         params->filter_id,
	                                         params->filter_glob,
	                                         params->filter_search);

	/* Update the active indices of bookmarks & co. */
	sfile->systemnr = fsmenu_get_active_indices(fsmenu, FS_CATEGORY_SYSTEM, params->dir);
	sfile->system_bookmarknr = fsmenu_get_active_indices(fsmenu, FS_CATEGORY_SYSTEM_BOOKMARKS, params->dir);
	sfile->bookmarknr = fsmenu_get_active_indices(fsmenu, FS_CATEGORY_BOOKMARKS, params->dir);
	sfile->recentnr = fsmenu_get_active_indices(fsmenu, FS_CATEGORY_RECENT, params->dir);

	if (filelist_force_reset(sfile->files)) {
		filelist_readjob_stop(wm, sa);
		filelist_clear(sfile->files);
	}

	if (filelist_empty(sfile->files)) {
		if (!filelist_pending(sfile->files)) {
			filelist_readjob_start(sfile->files, C);
		}
	}

	filelist_sort(sfile->files);
	filelist_filter(sfile->files);

	if (params->display == FILE_IMGDISPLAY) {
		filelist_cache_previews_set(sfile->files, true);
	}
	else {
		filelist_cache_previews_set(sfile->files, false);
		if (sfile->previews_timer) {
			WM_event_remove_timer_notifier(wm, CTX_wm_window(C), sfile->previews_timer);
			sfile->previews_timer = NULL;
		}
	}

	if (params->renamefile[0] != '\0') {
		int idx = filelist_file_findpath(sfile->files, params->renamefile);
		if (idx >= 0) {
			FileDirEntry *file = filelist_file(sfile->files, idx);
			if (file) {
				filelist_entry_select_set(sfile->files, file, FILE_SEL_ADD, FILE_SEL_EDITING, CHECK_ALL);
			}
		}
		BLI_strncpy(sfile->params->renameedit, sfile->params->renamefile, sizeof(sfile->params->renameedit));
		/* File listing is now async, do not clear renamefile if matching entry not found
		 * and dirlist is not finished! */
		if (idx >= 0 || filelist_is_ready(sfile->files)) {
			params->renamefile[0] = '\0';
		}
	}

	if (sfile->layout) {
		sfile->layout->dirty = true;
	}

	/* Might be called with NULL sa, see file_main_region_draw() below. */
	if (sa && BKE_area_find_region_type(sa, RGN_TYPE_TOOLS) == NULL) {
		/* Create TOOLS/TOOL_PROPS regions. */
		file_tools_region(sa);

		ED_area_initialize(wm, CTX_wm_window(C), sa);
		ED_area_tag_redraw(sa);
	}
}

static void file_listener(bScreen *UNUSED(sc), ScrArea *sa, wmNotifier *wmn)
{
	SpaceFile *sfile = (SpaceFile *)sa->spacedata.first;

	/* context changes */
	switch (wmn->category) {
		case NC_SPACE:
			switch (wmn->data) {
				case ND_SPACE_FILE_LIST:
					ED_area_tag_refresh(sa);
					ED_area_tag_redraw(sa);
					break;
				case ND_SPACE_FILE_PARAMS:
					ED_area_tag_refresh(sa);
					ED_area_tag_redraw(sa);
					break;
				case ND_SPACE_FILE_PREVIEW:
					if (sfile->files && filelist_cache_previews_update(sfile->files)) {
						ED_area_tag_refresh(sa);
						ED_area_tag_redraw(sa);
					}
					break;
			}
			break;
	}
}

/* add handlers, stuff you only do once or on area/region changes */
static void file_main_region_init(wmWindowManager *wm, ARegion *ar)
{
	wmKeyMap *keymap;
	
	UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_LIST, ar->winx, ar->winy);
	
	/* own keymaps */
	keymap = WM_keymap_find(wm->defaultconf, "File Browser", SPACE_FILE, 0);
	WM_event_add_keymap_handler_bb(&ar->handlers, keymap, &ar->v2d.mask, &ar->winrct);

	keymap = WM_keymap_find(wm->defaultconf, "File Browser Main", SPACE_FILE, 0);
	WM_event_add_keymap_handler_bb(&ar->handlers, keymap, &ar->v2d.mask, &ar->winrct);
}

static void file_main_region_listener(bScreen *UNUSED(sc), ScrArea *UNUSED(sa), ARegion *ar, wmNotifier *wmn)
{
	/* context changes */
	switch (wmn->category) {
		case NC_SPACE:
			switch (wmn->data) {
				case ND_SPACE_FILE_LIST:
					ED_region_tag_redraw(ar);
					break;
				case ND_SPACE_FILE_PARAMS:
					ED_region_tag_redraw(ar);
					break;
			}
			break;
	}
}

static void file_main_region_draw(const bContext *C, ARegion *ar)
{
	/* draw entirely, view changes should be handled here */
	SpaceFile *sfile = CTX_wm_space_file(C);
	FileSelectParams *params = ED_fileselect_get_params(sfile);

	View2D *v2d = &ar->v2d;
	View2DScrollers *scrollers;
	float col[3];

	/* Needed, because filelist is not initialized on loading */
	if (!sfile->files || filelist_empty(sfile->files))
		file_refresh(C, NULL);

	/* clear and setup matrix */
	UI_GetThemeColor3fv(TH_BACK, col);
	glClearColor(col[0], col[1], col[2], 0.0);
	glClear(GL_COLOR_BUFFER_BIT);
	
	/* Allow dynamically sliders to be set, saves notifiers etc. */
	
	if (params->display == FILE_IMGDISPLAY) {
		v2d->scroll = V2D_SCROLL_RIGHT;
		v2d->keepofs &= ~V2D_LOCKOFS_Y;
		v2d->keepofs |= V2D_LOCKOFS_X;
	}
	else {
		v2d->scroll = V2D_SCROLL_BOTTOM;
		v2d->keepofs &= ~V2D_LOCKOFS_X;
		v2d->keepofs |= V2D_LOCKOFS_Y;
		
		/* XXX this happens on scaling down Screen (like from startup.blend) */
		/* view2d has no type specific for filewindow case, which doesnt scroll vertically */
		if (v2d->cur.ymax < 0) {
			v2d->cur.ymin -= v2d->cur.ymax;
			v2d->cur.ymax = 0;
		}
	}
	/* v2d has initialized flag, so this call will only set the mask correct */
	UI_view2d_region_reinit(v2d, V2D_COMMONVIEW_LIST, ar->winx, ar->winy);

	/* sets tile/border settings in sfile */
	file_calc_previews(C, ar);

	/* set view */
	UI_view2d_view_ortho(v2d);
	
	/* on first read, find active file */
	if (params->highlight_file == -1) {
		wmEvent *event = CTX_wm_window(C)->eventstate;
		file_highlight_set(sfile, ar, event->x, event->y);
	}
	
	file_draw_list(C, ar);
	
	/* reset view matrix */
	UI_view2d_view_restore(C);
	
	/* scrollers */
	scrollers = UI_view2d_scrollers_calc(C, v2d, V2D_ARG_DUMMY, V2D_ARG_DUMMY, V2D_ARG_DUMMY, V2D_ARG_DUMMY);
	UI_view2d_scrollers_draw(C, v2d, scrollers);
	UI_view2d_scrollers_free(scrollers);

}

static void file_operatortypes(void)
{
	WM_operatortype_append(FILE_OT_select);
	WM_operatortype_append(FILE_OT_select_walk);
	WM_operatortype_append(FILE_OT_select_all_toggle);
	WM_operatortype_append(FILE_OT_select_border);
	WM_operatortype_append(FILE_OT_select_bookmark);
	WM_operatortype_append(FILE_OT_highlight);
	WM_operatortype_append(FILE_OT_execute);
	WM_operatortype_append(FILE_OT_cancel);
	WM_operatortype_append(FILE_OT_parent);
	WM_operatortype_append(FILE_OT_previous);
	WM_operatortype_append(FILE_OT_next);
	WM_operatortype_append(FILE_OT_refresh);
	WM_operatortype_append(FILE_OT_bookmark_toggle);
	WM_operatortype_append(FILE_OT_bookmark_add);
	WM_operatortype_append(FILE_OT_bookmark_delete);
	WM_operatortype_append(FILE_OT_bookmark_cleanup);
	WM_operatortype_append(FILE_OT_bookmark_move);
	WM_operatortype_append(FILE_OT_reset_recent);
	WM_operatortype_append(FILE_OT_filenum);
	WM_operatortype_append(FILE_OT_directory_new);
	WM_operatortype_append(FILE_OT_delete);
	WM_operatortype_append(FILE_OT_rename);
	WM_operatortype_append(FILE_OT_smoothscroll);
	WM_operatortype_append(FILE_OT_filepath_drop);
}

/* NOTE: do not add .blend file reading on this level */
static void file_keymap(struct wmKeyConfig *keyconf)
{
	wmKeyMapItem *kmi;
	/* keys for all regions */
	wmKeyMap *keymap = WM_keymap_find(keyconf, "File Browser", SPACE_FILE, 0);

	/* More common 'fliebrowser-like navigation' shortcuts. */
	WM_keymap_add_item(keymap, "FILE_OT_parent", UPARROWKEY, KM_PRESS, KM_ALT, 0);
	WM_keymap_add_item(keymap, "FILE_OT_previous", LEFTARROWKEY, KM_PRESS, KM_ALT, 0);
	WM_keymap_add_item(keymap, "FILE_OT_next", RIGHTARROWKEY, KM_PRESS, KM_ALT, 0);
	WM_keymap_add_item(keymap, "FILE_OT_refresh", RKEY, KM_PRESS, 0, 0);

	WM_keymap_add_item(keymap, "FILE_OT_parent", PKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "FILE_OT_previous", BACKSPACEKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "FILE_OT_next", BACKSPACEKEY, KM_PRESS, KM_SHIFT, 0);
	kmi = WM_keymap_add_item(keymap, "WM_OT_context_toggle", HKEY, KM_PRESS, 0, 0);
	RNA_string_set(kmi->ptr, "data_path", "space_data.params.show_hidden");
	WM_keymap_add_item(keymap, "FILE_OT_directory_new", IKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "FILE_OT_delete", XKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "FILE_OT_delete", DELKEY, KM_PRESS, 0, 0);

	WM_keymap_verify_item(keymap, "FILE_OT_smoothscroll", TIMER1, KM_ANY, KM_ANY, 0);

	WM_keymap_add_item(keymap, "FILE_OT_bookmark_toggle", TKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "FILE_OT_bookmark_add", BKEY, KM_PRESS, KM_CTRL, 0);

	/* keys for main region */
	keymap = WM_keymap_find(keyconf, "File Browser Main", SPACE_FILE, 0);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_execute", LEFTMOUSE, KM_DBL_CLICK, 0, 0);
	RNA_boolean_set(kmi->ptr, "need_active", true);

	WM_keymap_add_item(keymap, "FILE_OT_refresh", PADPERIOD, KM_PRESS, 0, 0);

	/* left mouse selects and opens */
	WM_keymap_add_item(keymap, "FILE_OT_select", LEFTMOUSE, KM_CLICK, 0, 0);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select", LEFTMOUSE, KM_CLICK, KM_SHIFT, 0);
	RNA_boolean_set(kmi->ptr, "extend", true);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select", LEFTMOUSE, KM_CLICK, KM_CTRL | KM_SHIFT, 0);
	RNA_boolean_set(kmi->ptr, "extend", true);
	RNA_boolean_set(kmi->ptr, "fill", true);

	/* right mouse selects without opening */
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select", RIGHTMOUSE, KM_CLICK, 0, 0);
	RNA_boolean_set(kmi->ptr, "open", false);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select", RIGHTMOUSE, KM_CLICK, KM_SHIFT, 0);
	RNA_boolean_set(kmi->ptr, "extend", true);
	RNA_boolean_set(kmi->ptr, "open", false);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select", RIGHTMOUSE, KM_CLICK, KM_ALT, 0);
	RNA_boolean_set(kmi->ptr, "extend", true);
	RNA_boolean_set(kmi->ptr, "fill", true);
	RNA_boolean_set(kmi->ptr, "open", false);


	/* arrow keys navigation (walk selecting) */
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", UPARROWKEY, KM_PRESS, 0, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_UP);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", UPARROWKEY, KM_PRESS, KM_SHIFT, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_UP);
	RNA_boolean_set(kmi->ptr, "extend", true);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", UPARROWKEY, KM_PRESS, KM_SHIFT | KM_CTRL, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_UP);
	RNA_boolean_set(kmi->ptr, "extend", true);
	RNA_boolean_set(kmi->ptr, "fill", true);

	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", DOWNARROWKEY, KM_PRESS, 0, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_DOWN);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", DOWNARROWKEY, KM_PRESS, KM_SHIFT, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_DOWN);
	RNA_boolean_set(kmi->ptr, "extend", true);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", DOWNARROWKEY, KM_PRESS, KM_SHIFT | KM_CTRL, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_DOWN);
	RNA_boolean_set(kmi->ptr, "extend", true);
	RNA_boolean_set(kmi->ptr, "fill", true);

	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", LEFTARROWKEY, KM_PRESS, 0, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_LEFT);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", LEFTARROWKEY, KM_PRESS, KM_SHIFT, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_LEFT);
	RNA_boolean_set(kmi->ptr, "extend", true);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", LEFTARROWKEY, KM_PRESS, KM_SHIFT | KM_CTRL, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_LEFT);
	RNA_boolean_set(kmi->ptr, "extend", true);
	RNA_boolean_set(kmi->ptr, "fill", true);

	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", RIGHTARROWKEY, KM_PRESS, 0, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_RIGHT);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", RIGHTARROWKEY, KM_PRESS, KM_SHIFT, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_RIGHT);
	RNA_boolean_set(kmi->ptr, "extend", true);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_select_walk", RIGHTARROWKEY, KM_PRESS, KM_SHIFT | KM_CTRL, 0);
	RNA_enum_set(kmi->ptr, "direction", FILE_SELECT_WALK_RIGHT);
	RNA_boolean_set(kmi->ptr, "extend", true);
	RNA_boolean_set(kmi->ptr, "fill", true);


	/* front and back mouse folder navigation */
	WM_keymap_add_item(keymap, "FILE_OT_previous", BUTTON4MOUSE, KM_CLICK, 0, 0);
	WM_keymap_add_item(keymap, "FILE_OT_next", BUTTON5MOUSE, KM_CLICK, 0, 0);

	WM_keymap_add_item(keymap, "FILE_OT_select_all_toggle", AKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "FILE_OT_select_border", BKEY, KM_PRESS, 0, 0);
	WM_keymap_add_item(keymap, "FILE_OT_select_border", EVT_TWEAK_L, KM_ANY, 0, 0);
	WM_keymap_add_item(keymap, "FILE_OT_rename", LEFTMOUSE, KM_PRESS, KM_CTRL, 0);
	WM_keymap_add_item(keymap, "FILE_OT_highlight", MOUSEMOVE, KM_ANY, KM_ANY, 0);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADPLUSKEY, KM_PRESS, 0, 0);
	RNA_int_set(kmi->ptr, "increment", 1);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADPLUSKEY, KM_PRESS, KM_SHIFT, 0);
	RNA_int_set(kmi->ptr, "increment", 10);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADPLUSKEY, KM_PRESS, KM_CTRL, 0);
	RNA_int_set(kmi->ptr, "increment", 100);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADMINUS, KM_PRESS, 0, 0);
	RNA_int_set(kmi->ptr, "increment", -1);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADMINUS, KM_PRESS, KM_SHIFT, 0);
	RNA_int_set(kmi->ptr, "increment", -10);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADMINUS, KM_PRESS, KM_CTRL, 0);
	RNA_int_set(kmi->ptr, "increment", -100);
	
	
	/* keys for button region (top) */
	keymap = WM_keymap_find(keyconf, "File Browser Buttons", SPACE_FILE, 0);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADPLUSKEY, KM_PRESS, 0, 0);
	RNA_int_set(kmi->ptr, "increment", 1);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADPLUSKEY, KM_PRESS, KM_SHIFT, 0);
	RNA_int_set(kmi->ptr, "increment", 10);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADPLUSKEY, KM_PRESS, KM_CTRL, 0);
	RNA_int_set(kmi->ptr, "increment", 100);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADMINUS, KM_PRESS, 0, 0);
	RNA_int_set(kmi->ptr, "increment", -1);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADMINUS, KM_PRESS, KM_SHIFT, 0);
	RNA_int_set(kmi->ptr, "increment", -10);
	kmi = WM_keymap_add_item(keymap, "FILE_OT_filenum", PADMINUS, KM_PRESS, KM_CTRL, 0);
	RNA_int_set(kmi->ptr, "increment", -100);
}


static void file_tools_region_init(wmWindowManager *wm, ARegion *ar)
{
	wmKeyMap *keymap;

	ar->v2d.scroll = V2D_SCROLL_RIGHT | V2D_SCROLL_VERTICAL_HIDE;
	ED_region_panels_init(wm, ar);

	/* own keymaps */
	keymap = WM_keymap_find(wm->defaultconf, "File Browser", SPACE_FILE, 0);
	WM_event_add_keymap_handler_bb(&ar->handlers, keymap, &ar->v2d.mask, &ar->winrct);
}

static void file_tools_region_draw(const bContext *C, ARegion *ar)
{
	ED_region_panels(C, ar, NULL, -1, true);
}

static void file_tools_region_listener(bScreen *UNUSED(sc), ScrArea *UNUSED(sa), ARegion *UNUSED(ar), wmNotifier *UNUSED(wmn))
{
#if 0
	/* context changes */
	switch (wmn->category) {
		
	}
#endif
}

/* add handlers, stuff you only do once or on area/region changes */
static void file_header_region_init(wmWindowManager *wm, ARegion *ar)
{
	wmKeyMap *keymap;
	
	ED_region_header_init(ar);
	
	keymap = WM_keymap_find(wm->defaultconf, "File Browser", SPACE_FILE, 0);
	WM_event_add_keymap_handler_bb(&ar->handlers, keymap, &ar->v2d.mask, &ar->winrct);
}

static void file_header_region_draw(const bContext *C, ARegion *ar)
{
	ED_region_header(C, ar);
}

/* add handlers, stuff you only do once or on area/region changes */
static void file_ui_region_init(wmWindowManager *wm, ARegion *ar)
{
	wmKeyMap *keymap;

	UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_HEADER, ar->winx, ar->winy);

	/* own keymap */
	keymap = WM_keymap_find(wm->defaultconf, "File Browser", SPACE_FILE, 0);
	WM_event_add_keymap_handler_bb(&ar->handlers, keymap, &ar->v2d.mask, &ar->winrct);

	keymap = WM_keymap_find(wm->defaultconf, "File Browser Buttons", SPACE_FILE, 0);
	WM_event_add_keymap_handler_bb(&ar->handlers, keymap, &ar->v2d.mask, &ar->winrct);
}

static void file_ui_region_draw(const bContext *C, ARegion *ar)
{
	float col[3];
	/* clear */
	UI_GetThemeColor3fv(TH_BACK, col);
	glClearColor(col[0], col[1], col[2], 0.0);
	glClear(GL_COLOR_BUFFER_BIT);

	/* scrolling here is just annoying, disable it */
	ar->v2d.cur.ymax = BLI_rctf_size_y(&ar->v2d.cur);
	ar->v2d.cur.ymin = 0;

	/* set view2d view matrix for scrolling (without scrollers) */
	UI_view2d_view_ortho(&ar->v2d);


	file_draw_buttons(C, ar);

	UI_view2d_view_restore(C);
}

static void file_ui_region_listener(bScreen *UNUSED(sc), ScrArea *UNUSED(sa), ARegion *ar, wmNotifier *wmn)
{
	/* context changes */
	switch (wmn->category) {
		case NC_SPACE:
			switch (wmn->data) {
				case ND_SPACE_FILE_LIST:
					ED_region_tag_redraw(ar);
					break;
			}
			break;
	}
}

static int filepath_drop_poll(bContext *C, wmDrag *drag, const wmEvent *UNUSED(event))
{
	if (drag->type == WM_DRAG_PATH) {
		SpaceFile *sfile = CTX_wm_space_file(C);
		if (sfile) {
			return 1;
		}
	}
	return 0;
}

static void filepath_drop_copy(wmDrag *drag, wmDropBox *drop)
{
	RNA_string_set(drop->ptr, "filepath", drag->path);
}

/* region dropbox definition */
static void file_dropboxes(void)
{
	ListBase *lb = WM_dropboxmap_find("Window", SPACE_EMPTY, RGN_TYPE_WINDOW);

	WM_dropbox_add(lb, "FILE_OT_filepath_drop", filepath_drop_poll, filepath_drop_copy);
}

/* only called once, from space/spacetypes.c */
void ED_spacetype_file(void)
{
	SpaceType *st = MEM_callocN(sizeof(SpaceType), "spacetype file");
	ARegionType *art;
	
	st->spaceid = SPACE_FILE;
	strncpy(st->name, "File", BKE_ST_MAXNAME);
	
	st->new = file_new;
	st->free = file_free;
	st->init = file_init;
	st->exit = file_exit;
	st->duplicate = file_duplicate;
	st->refresh = file_refresh;
	st->listener = file_listener;
	st->operatortypes = file_operatortypes;
	st->keymap = file_keymap;
	st->dropboxes = file_dropboxes;

	/* regions: main window */
	art = MEM_callocN(sizeof(ARegionType), "spacetype file region");
	art->regionid = RGN_TYPE_WINDOW;
	art->init = file_main_region_init;
	art->draw = file_main_region_draw;
	art->listener = file_main_region_listener;
	art->keymapflag = ED_KEYMAP_UI | ED_KEYMAP_VIEW2D;
	BLI_addhead(&st->regiontypes, art);
	
	/* regions: header */
	art = MEM_callocN(sizeof(ARegionType), "spacetype file region");
	art->regionid = RGN_TYPE_HEADER;
	art->prefsizey = HEADERY;
	art->keymapflag = ED_KEYMAP_UI | ED_KEYMAP_VIEW2D | ED_KEYMAP_HEADER;
	art->init = file_header_region_init;
	art->draw = file_header_region_draw;
	// art->listener = file_header_region_listener;
	BLI_addhead(&st->regiontypes, art);
	
	/* regions: ui */
	art = MEM_callocN(sizeof(ARegionType), "spacetype file region");
	art->regionid = RGN_TYPE_UI;
	art->prefsizey = 60;
	art->keymapflag = ED_KEYMAP_UI;
	art->listener = file_ui_region_listener;
	art->init = file_ui_region_init;
	art->draw = file_ui_region_draw;
	BLI_addhead(&st->regiontypes, art);

	/* regions: channels (directories) */
	art = MEM_callocN(sizeof(ARegionType), "spacetype file region");
	art->regionid = RGN_TYPE_TOOLS;
	art->prefsizex = 240;
	art->prefsizey = 60;
	art->keymapflag = ED_KEYMAP_UI;
	art->listener = file_tools_region_listener;
	art->init = file_tools_region_init;
	art->draw = file_tools_region_draw;
	BLI_addhead(&st->regiontypes, art);

	/* regions: tool properties */
	art = MEM_callocN(sizeof(ARegionType), "spacetype file operator region");
	art->regionid = RGN_TYPE_TOOL_PROPS;
	art->prefsizex = 0;
	art->prefsizey = 360;
	art->keymapflag = ED_KEYMAP_UI;
	art->listener = file_tools_region_listener;
	art->init = file_tools_region_init;
	art->draw = file_tools_region_draw;
	BLI_addhead(&st->regiontypes, art);
	file_panels_register(art);

	BKE_spacetype_register(st);

}

void ED_file_init(void)
{
	ED_file_read_bookmarks();

	if (G.background == false) {
		filelist_init_icons();
	}

	IMB_thumb_makedirs();
}

void ED_file_exit(void)
{
	fsmenu_free();

	if (G.background == false) {
		filelist_free_icons();
	}
}

void ED_file_read_bookmarks(void)
{
	const char * const cfgdir = BKE_appdir_folder_id(BLENDER_USER_CONFIG, NULL);
	
	fsmenu_free();

	fsmenu_read_system(ED_fsmenu_get(), true);

	if (cfgdir) {
		char name[FILE_MAX];
		BLI_make_file_string("/", name, cfgdir, BLENDER_BOOKMARK_FILE);
		fsmenu_read_bookmarks(ED_fsmenu_get(), name);
	}
}