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/*
* Directory editor mode for QEmacs.
* Copyright (c) 2001, 2002 Fabrice Bellard.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "qe.h"
enum { DIRED_HEADER = 0 };
enum {
DIRED_SORT_NAME = 1,
DIRED_SORT_EXTENSION = 2,
DIRED_SORT_SIZE = 4,
DIRED_SORT_DATE = 8,
DIRED_SORT_MASK = 1+2+4+8,
DIRED_SORT_GROUP = 16,
DIRED_SORT_DESCENDING = 32,
};
typedef struct DiredState {
StringArray items;
int sort_mode; /* DIRED_SORT_GROUP | DIRED_SORT_NAME */
int last_index;
char path[MAX_FILENAME_SIZE]; /* current path */
} DiredState;
/* opaque structure for sorting DiredState.items StringArray */
typedef struct DiredItem {
DiredState *state;
mode_t mode;
off_t size;
time_t mtime;
int offset;
char mark;
char name[1];
} DiredItem;
static void dired_view_file(EditState *s, const char *filename);
extern inline int dired_get_index(EditState *s) {
return list_get_pos(s) - DIRED_HEADER;
}
void dired_free(EditState *s)
{
DiredState *ds = s->mode_data;
int i;
/* free opaques */
for (i = 0; i < ds->items.nb_items; i++) {
free(ds->items.items[i]->opaque);
}
free_strings(&ds->items);
ds->last_index = -1;
/* reset cursor position */
s->offset = 0;
}
/* sort alphabetically with directories first */
static int dired_sort_func(const void *p1, const void *p2)
{
const StringItem *item1 = *(const StringItem **)p1;
const StringItem *item2 = *(const StringItem **)p2;
const DiredItem *dip1 = item1->opaque;
const DiredItem *dip2 = item2->opaque;
int mode = dip1->state->sort_mode, res;
int is_dir1, is_dir2;
if (mode & DIRED_SORT_GROUP) {
is_dir1 = !!S_ISDIR(dip1->mode);
is_dir2 = !!S_ISDIR(dip2->mode);
if (is_dir1 != is_dir2)
return is_dir2 - is_dir1;
}
for (;;) {
if (mode & DIRED_SORT_DATE) {
if (dip1->mtime != dip2->mtime) {
res = (dip1->mtime < dip2->mtime) ? -1 : 1;
break;
}
}
if (mode & DIRED_SORT_SIZE) {
if (dip1->size != dip2->size) {
res = (dip1->size < dip2->size) ? -1 : 1;
break;
}
}
if (mode & DIRED_SORT_EXTENSION) {
res = strcmp(extension(dip1->name), extension(dip2->name));
if (res)
break;
}
res = strcmp(dip1->name, dip2->name);
break;
}
return (mode & DIRED_SORT_DESCENDING) ? -res : res;
}
/* select current item */
static void do_dired_sort(EditState *s)
{
DiredState *hs = s->mode_data;
StringItem *item, *cur_item;
DiredItem *dip;
EditBuffer *b;
int index, i;
index = dired_get_index(s);
cur_item = NULL;
if (index >= 0 && index < hs->items.nb_items)
cur_item = hs->items.items[index];
qsort(hs->items.items, hs->items.nb_items,
sizeof(StringItem *), dired_sort_func);
/* construct list buffer */
b = s->b;
b->flags &= ~BF_READONLY;
eb_delete(b, 0, b->total_size);
s->offset = 0;
if (DIRED_HEADER)
eb_printf(b, " %s:\n", hs->path);
for (i = 0; i < hs->items.nb_items; i++) {
item = hs->items.items[i];
dip = item->opaque;
dip->offset = b->total_size;
if (item == cur_item)
s->offset = b->total_size;
eb_printf(b, "%c %s\n", dip->mark, item->str);
}
b->modified = 0;
b->flags |= BF_READONLY;
}
static void dired_mark(EditState *s, int mark)
{
DiredState *hs = s->mode_data;
const StringItem *item;
DiredItem *dip;
unsigned char ch;
int index;
index = dired_get_index(s);
if (index < 0 || index >= hs->items.nb_items)
return;
item = hs->items.items[index];
dip = item->opaque;
ch = dip->mark = mark;
eb_write(s->b, dip->offset, &ch, 1);
text_move_up_down(s, 1);
}
static void dired_sort(EditState *s, const char *sort_order)
{
DiredState *hs = s->mode_data;
const char *p;
for (p = sort_order; *p; p++) {
switch (tolower(*p)) {
case 'n': /* name */
hs->sort_mode &= ~DIRED_SORT_MASK;
hs->sort_mode |= DIRED_SORT_NAME;
break;
case 'e': /* extension */
hs->sort_mode &= ~DIRED_SORT_MASK;
hs->sort_mode |= DIRED_SORT_EXTENSION;
break;
case 's': /* size */
hs->sort_mode &= ~DIRED_SORT_MASK;
hs->sort_mode |= DIRED_SORT_SIZE;
break;
case 'd': /* direct */
hs->sort_mode &= ~DIRED_SORT_MASK;
hs->sort_mode |= DIRED_SORT_DATE;
break;
case 'u': /* ungroup */
hs->sort_mode &= ~DIRED_SORT_GROUP;
break;
case 'g': /* group */
hs->sort_mode |= DIRED_SORT_GROUP;
break;
case '+': /* ascending */
hs->sort_mode &= ~DIRED_SORT_DESCENDING;
break;
case '-': /* descending */
hs->sort_mode |= DIRED_SORT_DESCENDING;
break;
case 'r': /* reverse */
hs->sort_mode ^= DIRED_SORT_DESCENDING;
break;
}
}
do_dired_sort(s);
}
#define MAX_COL_FILE_SIZE 32
void build_dired_list(EditState *s, const char *path)
{
DiredState *hs = s->mode_data;
FindFileState *ffs;
char filename[MAX_FILENAME_SIZE];
char line[1024], buf[1024];
const char *p;
struct stat st;
int ct, len;
StringItem *item;
/* free previous list, if any */
dired_free(s);
/* CG: should make absolute ? */
canonize_path(hs->path, sizeof(hs->path), path);
set_filename(s->b, hs->path);
s->b->flags |= BF_DIRED;
ffs = find_file_open(hs->path, "*");
while (!find_file_next(ffs, filename, sizeof(filename))) {
if (lstat(filename, &st) < 0)
continue;
p = basename(filename);
#if 1 /* CG: bad idea, but causes spurious bugs */
/* exclude redundant '.' and '..' */
if (!strcmp(p, ".") || !strcmp(p, ".."))
continue;
#endif
pstrcpy(line, sizeof(line), p);
ct = 0;
if (S_ISDIR(st.st_mode)) {
ct = '/';
} else if (S_ISFIFO(st.st_mode)) {
ct = '|';
} else if (S_ISSOCK(st.st_mode)) {
ct = '=';
} else if (S_ISLNK(st.st_mode)) {
ct = '@';
} else if ((st.st_mode & 0111) != 0) {
ct = '*';
}
if (ct) {
buf[0] = ct;
buf[1] = '\0';
pstrcat(line, sizeof(line), buf);
}
/* pad with ' ' */
len = strlen(line);
while (len < MAX_COL_FILE_SIZE)
line[len++] = ' ';
line[len] = '\0';
/* add file size or file info */
if (S_ISREG(st.st_mode)) {
sprintf(buf, "%9ld", (long)st.st_size);
} else if (S_ISDIR(st.st_mode)) {
sprintf(buf, "%9s", "<dir>");
} else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
int major, minor;
major = (st.st_rdev >> 8) & 0xff;
minor = st.st_rdev & 0xff;
sprintf(buf, "%c%4d%4d",
S_ISCHR(st.st_mode) ? 'c' : 'b',
major, minor);
} else if (S_ISLNK(st.st_mode)) {
pstrcat(line, sizeof(line), "-> ");
len = readlink(filename, buf, sizeof(buf) - 1);
if (len < 0)
len = 0;
buf[len] = '\0';
} else {
buf[0] = '\0';
}
pstrcat(line, sizeof(line), buf);
item = add_string(&hs->items, line);
if (item) {
DiredItem *dip;
dip = malloc(sizeof(DiredItem) + strlen(p));
dip->state = hs;
dip->mode = st.st_mode;
dip->size = st.st_size;
dip->mtime = st.st_mtime;
dip->mark = ' ';
strcpy(dip->name, p);
item->opaque = dip;
}
}
find_file_close(ffs);
do_dired_sort(s);
}
static char *get_dired_filename(EditState *s,
char *buf, int buf_size, int index)
{
DiredState *hs = s->mode_data;
const StringItem *item;
const DiredItem *dip;
/* CG: assuming buf_size > 0 */
buf[0] = '\0';
if (index < 0 || index >= hs->items.nb_items)
return NULL;
item = hs->items.items[index];
dip = item->opaque;
/* build filename */
/* CG: Should canonize path */
return makepath(buf, buf_size, hs->path, dip->name);
}
/* select current item */
static void dired_select(EditState *s)
{
struct stat st;
char filename[MAX_FILENAME_SIZE];
EditState *e;
if (!get_dired_filename(s, filename, sizeof(filename),
dired_get_index(s))) {
return;
}
/* now we can act */
if (lstat(filename, &st) < 0)
return;
if (S_ISDIR(st.st_mode)) {
build_dired_list(s, filename);
} else if (S_ISREG(st.st_mode)) {
e = find_window(s, KEY_RIGHT);
if (e) {
/* delete dired window */
do_delete_window(s, 1);
/* remove preview flag */
e->b->flags &= ~BF_PREVIEW;
} else {
do_load(s, filename);
}
}
}
static void dired_view_file(EditState *s, const char *filename)
{
EditBuffer *b;
EditState *e, *e1;
e = find_window(s, KEY_RIGHT);
if (!e)
return;
/* close previous temporary buffers, if any */
/* CG: Should use the do_find_alternate to replace buffer */
b = e->b;
if ((b->flags & BF_PREVIEW) && !b->modified) {
switch_to_buffer(e, NULL);
/* Before freeing buffer, make sure it isn't used by another window.
* This could happen if we split the view window and continue browsing. */
for (e1 = s->qe_state->first_window; e1 != NULL; e1 = e1->next_window) {
if (e1 != s && e1->b == b)
break;
}
if (!e1)
eb_free(b);
}
if (e) {
do_load(e, filename);
/* disable wrapping to get nicer display */
e->wrap = WRAP_TRUNCATE;
b = e->b;
if (!b) {
b = eb_new("*scratch*", BF_SAVELOG);
e->b = b;
}
/* mark buffer as preview, so that it will get recycled if needed */
/* CG: this is wrong if buffer existed already */
b->flags |= BF_PREVIEW;
}
}
static void dired_execute(EditState *s)
{
/* Actually delete, copy, or move the marked items */
put_status(s, "Not yet implemented");
}
static void dired_parent(EditState *s)
{
DiredState *hs = s->mode_data;
char filename[MAX_FILENAME_SIZE];
makepath(filename, sizeof(filename), hs->path, "..");
/* CG: Should make current directory current item in parent */
build_dired_list(s, filename);
}
static void dired_refresh(EditState *s)
{
DiredState *hs = s->mode_data;
/* CG: Should try and keep current entry */
build_dired_list(s, hs->path);
}
static void dired_display_hook(EditState *s)
{
DiredState *ds = s->mode_data;
char filename[MAX_FILENAME_SIZE];
int index;
/* Prevent point from going beyond list */
if (s->offset && s->offset == s->b->total_size)
do_up_down(s, -1);
/* open file so that user can see it before it is selected */
/* XXX: find a better solution (callback) */
index = dired_get_index(s);
if (index < 0 || index >= ds->items.nb_items)
return;
/* Should not rely on last_index! */
if (index != ds->last_index) {
ds->last_index = index;
if (get_dired_filename(s, filename, sizeof(filename),
dired_get_index(s))) {
dired_view_file(s, filename);
}
}
}
static int dired_mode_init(EditState *s, ModeSavedData *saved_data)
{
DiredState *hs;
list_mode.mode_init(s, saved_data);
hs = s->mode_data;
hs->sort_mode = DIRED_SORT_GROUP | DIRED_SORT_NAME;
build_dired_list(s, s->b->filename);
return 0;
}
static void dired_mode_close(EditState *s)
{
dired_free(s);
list_mode.mode_close(s);
}
/* can only apply dired mode on directories */
static int dired_mode_probe(ModeProbeData *p)
{
if (S_ISDIR(p->mode))
return 100;
else
return 0;
}
ModeDef dired_mode;
/* open dired window on the left. The directory of the current file is
used */
void do_dired(EditState *s)
{
DiredState *hs;
QEmacsState *qs = s->qe_state;
EditBuffer *b, *b0;
EditState *e, *e1;
int width, index, i;
char filename[MAX_FILENAME_SIZE], *p;
/* Should take directory argument with optional switches,
* find dired window if exists,
* else create one and do this.
* recursive listing and multi directory patterns.
*/
/* remember current buffer for target positioning, because
* s may be destroyed by insert_window_left
*/
b0 = s->b;
b = eb_new("*dired*", BF_READONLY | BF_SYSTEM);
/* set the filename to the directory of the current file */
pstrcpy(filename, sizeof(filename), s->b->filename);
p = strrchr(filename, '/');
if (p)
*p = '\0';
canonize_absolute_path(filename, sizeof(filename), filename);
set_filename(b, filename);
width = qs->width / 4;
e = insert_window_left(b, width, WF_MODELINE);
do_set_mode(e, &dired_mode, NULL);
hs = e->mode_data;
e1 = find_window(e, KEY_RIGHT);
if (e1)
b0 = e1->b;
index = 0;
/* CG: target file should be an argument to this command */
for (i = 0; i < hs->items.nb_items; i++) {
if (get_dired_filename(e, filename, sizeof(filename), i)
&& !strcmp(filename, b0->filename)) {
index = i;
break;
}
}
e->offset = eb_goto_pos(e->b, index + DIRED_HEADER, 0);
/* modify active window */
qs->active_window = e;
}
/* specific dired commands */
static CmdDef dired_commands[] = {
CMD0( KEY_RET, KEY_RIGHT, "dired-select", dired_select)
CMD0( KEY_TAB, KEY_NONE, "dired-tab", do_other_window)
/* dired-abort should restore previous buffer in right-window */
CMD1( KEY_CTRL('g'), KEY_NONE, "dired-abort", do_delete_window, 0)
CMD0( ' ', KEY_CTRL('t'), "dired-toggle_selection", list_toggle_selection)
/* BS should go back to previous item and unmark it */
CMD_( 's', KEY_NONE, "dired-sort", dired_sort, "s{Sort order: }")
/* s -> should also change switches */
CMD1( 'd', KEY_NONE, "dired-delete", dired_mark, 'D')
CMD1( 'c', KEY_NONE, "dired-copy", dired_mark, 'C')
CMD1( 'm', KEY_NONE, "dired-move", dired_mark, 'M')
CMD1( 'u', KEY_NONE, "dired-unmark", dired_mark, ' ')
CMD0( 'x', KEY_NONE, "dired-execute", dired_execute)
CMD1( 'n', KEY_NONE, "next-line", do_up_down, 1 )
CMD1( 'p', KEY_NONE, "previous-line", do_up_down, -1 )
CMD0( 'r', KEY_NONE, "dired-refresh", dired_refresh)
/* g -> refresh all expanded dirs ? */
/* l -> relist single directory or marked files ? */
CMD0( '^', KEY_LEFT, "dired-parent", dired_parent)
/* need commands for splitting, unsplitting, zooming, making subdirs */
/* h -> info */
/* i, + -> create subdirectory */
/* o -> explore in other window */
/* R -> rename a file or move selection to another directory */
/* C -> copy files */
/* mark files globally */
CMD_DEF_END,
};
static CmdDef dired_global_commands[] = {
CMD0( KEY_CTRLX(KEY_CTRL('d')), KEY_NONE, "dired", do_dired)
CMD_DEF_END,
};
static int dired_init(void)
{
/* inherit from list mode */
/* CG: assuming list_mode already initialized ? */
memcpy(&dired_mode, &list_mode, sizeof(ModeDef));
dired_mode.name = "dired";
dired_mode.instance_size = sizeof(DiredState);
dired_mode.mode_probe = dired_mode_probe;
dired_mode.mode_init = dired_mode_init;
dired_mode.mode_close = dired_mode_close;
dired_mode.display_hook = dired_display_hook;
/* first register mode */
qe_register_mode(&dired_mode);
qe_register_cmd_table(dired_commands, "dired");
qe_register_cmd_table(dired_global_commands, NULL);
return 0;
}
qe_module_init(dired_init);
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