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Add beginning undo feature, since I want to start fixing bugs from savannah and don't want to manager another checking, and the code basically works for some operations. 

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4271 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
This commit is contained in:
Chris Allegretta 2008-07-10 20:13:04 +00:00
parent 1347f22c95
commit 07fcc4c973
8 changed files with 391 additions and 46 deletions
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5
ChangeLog
View File

@ -1,7 +1,12 @@
2008-07-09 Chris Allegretta <chrisa@asty.org>
* nano.c/nano.h/global.c/text.c: New generalized undo code, currently
just works for adding and deleting text and splitting and unsplitting lines.
2008-06-29 Chris Allegretta <chrisa@asty.org>
* global.c: Fix for not having search history when --disable-justify is used
(Savannah bug 23733)
GNU nano 2.1.2 - 2008.06.24
2008-06-24 Chris Allegretta <chrisa@asty.org>
* rcfile.c: Added function check_bad_binding() to look for sequences which

2
src/files.c
View File

@ -75,6 +75,8 @@ void initialize_buffer(void)
openfile->fmt = NIX_FILE;
openfile->current_stat = NULL;
openfile->undotop = NULL;
openfile->current_undo = NULL;
#endif
#ifdef ENABLE_COLOR
openfile->colorstrings = NULL;

36
src/global.c
View File

@ -1,5 +1,4 @@
/* $Id$
*/
/* $Id$ */
/**************************************************************************
* global.c *
* *
@ -150,11 +149,6 @@ const shortcut *currshortcut;
int currmenu;
/* The currently loaded menu */
#ifndef NANO_TINY
toggle *toggles = NULL;
/* The global toggle list. */
#endif
sc *sclist = NULL;
/* New shortcut key struct */
subnfunc *allfuncs = NULL;
@ -486,6 +480,8 @@ void shortcut_init(bool unjustify)
const char *refresh_msg = N_("Refresh");
const char *insert_file_msg = N_("Insert File");
const char *go_to_line_msg = N_("Go To Line");
const char *prev_undo_msg = N_("Prev Undo");
const char *next_undo_msg = N_("Next Undo");
#ifndef DISABLE_HELP
/* TRANSLATORS: The next long series of strings are shortcut descriptions;
@ -528,6 +524,8 @@ void shortcut_init(bool unjustify)
N_("Copy the current line and store it in the cutbuffer");
const char *nano_indent_msg = N_("Indent the current line");
const char *nano_unindent_msg = N_("Unindent the current line");
const char *nano_undo_msg = N_("Undo the last operation");
const char *nano_redo_msg = N_("Redo the last undone operation");
#endif
const char *nano_forward_msg = N_("Go forward one character");
const char *nano_back_msg = N_("Go back one character");
@ -602,6 +600,10 @@ void shortcut_init(bool unjustify)
N_("Recall the previous search/replace string");
const char *nano_next_history_msg =
N_("Recall the next search/replace string");
const char *nano_prev_undo_msg =
N_("Recall the previous undo action");
const char *nano_next_undo_msg =
N_("Recall the next undo action");
#endif
#ifndef DISABLE_BROWSER
const char *nano_tofiles_msg = N_("Go to file browser");
@ -698,6 +700,7 @@ void shortcut_init(bool unjustify)
add_to_funcs(do_page_down, MMAIN|MHELP,
next_page_msg, IFSCHELP(nano_nextpage_msg), TRUE, VIEW);
/* TRANSLATORS: Try to keep this at most 10 characters. */
add_to_funcs(do_cut_text_void, MMAIN, N_("Cut Text"), IFSCHELP(nano_cut_msg),
FALSE, NOVIEW);
@ -771,7 +774,13 @@ void shortcut_init(bool unjustify)
nano_indent_msg, FALSE, NOVIEW);
add_to_funcs(do_unindent, MMAIN, N_("Unindent Text"),
nano_unindent_msg, TRUE, NOVIEW);
nano_unindent_msg, FALSE, NOVIEW);
add_to_funcs(do_undo, MMAIN, N_("Undo"),
nano_undo_msg, FALSE, NOVIEW);
add_to_funcs(do_redo, MMAIN, N_("Redo"),
nano_redo_msg, TRUE, NOVIEW);
#endif
@ -1055,6 +1064,8 @@ void shortcut_init(bool unjustify)
add_to_sclist(MMAIN, "M-6", do_copy_text, 0, TRUE);
add_to_sclist(MMAIN, "M-}", do_indent_void, 0, TRUE);
add_to_sclist(MMAIN, "M-{", do_unindent, 0, TRUE);
add_to_sclist(MMAIN, "M-U", do_undo, 0, TRUE);
add_to_sclist(MMAIN, "M-E", do_redo, 0, TRUE);
add_to_sclist(MALL, "^F", do_right, 0, TRUE);
add_to_sclist(MALL, "^B", do_left, 0, TRUE);
add_to_sclist(MMAIN, "^Space", do_next_word_void, 0, TRUE);
@ -1576,15 +1587,6 @@ void thanks_for_all_the_fish(void)
#ifndef DISABLE_JUSTIFY
if (jusbuffer != NULL)
free_filestruct(jusbuffer);
#endif
#ifndef NANO_TINY
/* Free the memory associated with each toggle. */
while (toggles != NULL) {
toggle *t = toggles;
toggles = toggles->next;
free(t);
}
#endif
/* Free the memory associated with each open file buffer. */
if (openfile != NULL)

4
src/nano.c
View File

@ -502,6 +502,7 @@ openfilestruct *make_new_opennode(void)
newnode->filebot = NULL;
newnode->edittop = NULL;
newnode->current = NULL;
newnode->last_action = OTHER;
return newnode;
}
@ -1642,6 +1643,9 @@ void do_output(char *output, size_t output_len, bool allow_cntrls)
set_modified();
#ifndef NANO_TINY
update_undo(ADD, openfile);
/* Note that current_x has not yet been incremented. */
if (openfile->mark_set && openfile->current ==
openfile->mark_begin && openfile->current_x <

43
src/nano.h
View File

@ -169,6 +169,10 @@ typedef enum {
CONTROL, META, FKEY, RAW
} function_type;
typedef enum {
ADD, DEL, REPLACE, SPLIT, UNSPLIT, CUT, UNCUT, OTHER
} undo_type;
/* Structure types. */
typedef struct filestruct {
char *data;
@ -245,6 +249,21 @@ typedef struct syntaxtype {
} syntaxtype;
#endif /* ENABLE_COLOR */
#ifndef NANO_TINY
typedef struct undo {
undo_type type;
filestruct *fs;
int begin;
/* Where did this action begin or end */
char *strdata;
/* Generic pointer for data regardless of what type it is */
filestruct *fsdata;
/* Generic pointer for data regardless of what type it is */
struct undo *next;
ssize_t lineno;
} undo;
#endif /* NANO_TINY */
typedef struct openfilestruct {
char *filename;
/* The current file's name. */
@ -278,6 +297,11 @@ typedef struct openfilestruct {
/* The current file's format. */
struct stat *current_stat;
/* The current file's stat. */
undo *undotop;
/* Top of the undo list */
undo *current_undo;
/* The current (i.e. n ext) level of undo */
undo_type last_action;
#endif
#ifdef ENABLE_COLOR
colortype *colorstrings;
@ -318,25 +342,6 @@ typedef struct shortcut {
/* Next shortcut. */
} shortcut;
#ifndef NANO_TINY
typedef struct toggle {
int val;
/* The sequence to toggle the key. We should only need one. */
const char *desc;
/* The description of the toggle, e.g. "Cut to end"; we'll
* append Enabled or Disabled to it. */
#ifndef DISABLE_HELP
bool blank_after;
/* Whether there should be a blank line after the description of
* the toggle. */
#endif
long flag;
/* Which flag actually gets toggled. */
struct toggle *next;
/* Next toggle. */
} toggle;
#endif
#ifdef ENABLE_NANORC
typedef struct rcoption {
const char *name;

11
src/proto.h
View File

@ -60,6 +60,7 @@ extern char *matchbrackets;
#if !defined(NANO_TINY) && defined(ENABLE_NANORC)
extern char *whitespace;
extern int whitespace_len[2];
extern undo_type last_action;
#endif
#ifndef DISABLE_JUSTIFY
@ -100,9 +101,6 @@ extern char *syntaxstr;
extern const shortcut *currshortcut;
extern int currmenu;
#ifndef NANO_TINY
extern toggle *toggles;
#endif
#ifndef NANO_TINY
extern filestruct *search_history;
@ -619,6 +617,8 @@ void do_tab(void);
void do_indent(ssize_t cols);
void do_indent_void(void);
void do_unindent(void);
void do_undo(void);
void do_redo(void);
#endif
void do_enter(void);
#ifndef NANO_TINY
@ -706,6 +706,8 @@ void new_magicline(void);
void remove_magicline(void);
void mark_order(const filestruct **top, size_t *top_x, const filestruct
**bot, size_t *bot_x, bool *right_side_up);
void add_undo(undo_type current_action, openfilestruct *fs);
void update_undo(undo_type action, openfilestruct *fs);
#endif
size_t get_totsize(const filestruct *begin, const filestruct *end);
#ifdef DEBUG
@ -739,9 +741,6 @@ int get_mouseinput(int *mouse_x, int *mouse_y, bool allow_shortcuts);
const sc *get_shortcut(int menu, int *kbinput, bool
*meta_key, bool *func_key);
const sc *first_sc_for(int menu, void *func);
#ifndef NANO_TINY
const toggle *get_toggle(int kbinput, bool meta_key);
#endif
void blank_line(WINDOW *win, int y, int x, int n);
void blank_titlebar(void);
void blank_topbar(void);

2
src/rcfile.c
View File

@ -423,7 +423,7 @@ void parse_keybinding(char *ptr)
#ifdef DEBUG
fprintf(stderr, "newsc now address %d, menu func assigned = %d, menu = %d\n",
(int) newsc, (int) newsc->scfunc, menu);
&newsc, &newsc->scfunc, menu);
#endif

330
src/text.c
View File

@ -70,6 +70,10 @@ void do_delete(void)
/* Do we have to call edit_refresh(), or can we get away with
* just update_line()? */
#ifndef NANO_TINY
update_undo(DEL, openfile);
#endif
assert(openfile->current != NULL && openfile->current->data != NULL && openfile->current_x <= strlen(openfile->current->data));
openfile->placewewant = xplustabs();
@ -359,6 +363,179 @@ void do_unindent(void)
{
do_indent(-tabsize);
}
/* Undo the last thing(s) we did */
void do_undo(void)
{
undo *u = openfile->current_undo;
filestruct *f = openfile->current, *t;
int len = 0;
char *action, *data, *uu;
if (!u) {
statusbar(_("Nothing in undo buffer!"));
return;
}
if (u->lineno <= f->lineno)
for (; f->prev != NULL && f->lineno != u->lineno; f = f->prev)
;
else
for (; f->next != NULL && f->lineno != u->lineno; f = f->next)
;
if (f->lineno != u->lineno) {
statusbar(_("Couldnt match current undo line"));
return;
}
#ifdef DEBUG
fprintf(stderr, "data we're about to undo = \"%s\"\n", f->data);
fprintf(stderr, "Undo running for type %d\n", u->type);
#endif
switch(u->type) {
case ADD:
action = _("text add");
len = strlen(f->data) - strlen(u->strdata) + 1;
data = charalloc(len);
strncpy(data, f->data, u->begin);
strcpy(&data[u->begin], &f->data[u->begin + strlen(u->strdata)]);
free(f->data);
f->data = data;
break;
case DEL:
action = _("text delete");
len = strlen(f->data) + strlen(u->strdata) + 1;
data = charalloc(len);
strncpy(data, f->data, u->begin);
strcpy(&data[u->begin], u->strdata);
strcpy(&data[u->begin + strlen(u->strdata)], &f->data[u->begin]);
free(f->data);
f->data = data;
break;
case SPLIT:
action = _("line split");
free(f->data);
f->data = mallocstrcpy(NULL, u->strdata);
if (f->next != NULL) {
filestruct *tmp = f->next;
unlink_node(tmp);
delete_node(tmp);
}
renumber(openfile->current->prev);
break;
case UNSPLIT:
action = _("line join");
t = make_new_node(f);
t->data = mallocstrcpy(NULL, u->strdata);
data = mallocstrncpy(NULL, f->data, u->begin);
data[u->begin] = '\0';
free(f->data);
f->data = data;
splice_node(f, t, f->next);
renumber(openfile->current->prev);
break;
default:
action = _("wtf?");
break;
}
openfile->current = f;
openfile->current_x = u->begin;
edit_refresh();
statusbar(_("Undid action (%s)"), action);
openfile->current_undo = openfile->current_undo->next;
}
void do_redo(void)
{
undo *u = openfile->undotop;
filestruct *f = openfile->current, *t;
int len = 0;
char *action, *data, *uu;
for (; u != NULL && u->next != openfile->current_undo; u = u->next)
;
if (!u) {
statusbar(_("Nothing to re-do!"));
return;
}
if (u->next != openfile->current_undo) {
statusbar(_("Can't find previous undo to re-do, argh"));
return;
}
if (u->lineno <= f->lineno)
for (; f->prev != NULL && f->lineno != u->lineno; f = f->prev)
;
else
for (; f->next != NULL && f->lineno != u->lineno; f = f->next)
;
if (f->lineno != u->lineno) {
statusbar(_("Couldnt match current undo line"));
return;
}
#ifdef DEBUG
fprintf(stderr, "data we're about to redo = \"%s\"\n", f->data);
fprintf(stderr, "Redo running for type %d\n", u->type);
#endif
switch(u->type) {
case ADD:
action = _("text add");
len = strlen(f->data) + strlen(u->strdata) + 1;
data = charalloc(len);
strcpy(&data[u->begin], u->strdata);
strcpy(&data[u->begin + strlen(u->strdata)], &f->data[u->begin]);
free(f->data);
f->data = data;
break;
case DEL:
action = _("text delete");
len = strlen(f->data) + strlen(u->strdata) + 1;
data = charalloc(len);
strncpy(data, f->data, u->begin);
strcpy(&data[u->begin], &f->data[u->begin + strlen(u->strdata)]);
free(f->data);
f->data = data;
break;
case SPLIT:
action = _("line split");
t = make_new_node(f);
t->data = mallocstrcpy(NULL, u->strdata);
data = mallocstrncpy(NULL, f->data, u->begin);
data[u->begin] = '\0';
free(f->data);
f->data = data;
splice_node(f, t, f->next);
renumber(openfile->current->prev);
break;
case UNSPLIT:
action = _("line join");
free(f->data);
f->data = mallocstrcpy(NULL, u->strdata);
if (f->next != NULL) {
filestruct *tmp = f->next;
unlink_node(tmp);
delete_node(tmp);
}
renumber(openfile->current->prev);
break;
default:
action = _("wtf?");
break;
}
openfile->current = f;
openfile->current_x = u->begin;
edit_refresh();
statusbar(_("Redid action (%s)"), action);
openfile->current_undo = u;
}
#endif /* !NANO_TINY */
/* Someone hits Enter *gasp!* */
@ -367,9 +544,12 @@ void do_enter(void)
filestruct *newnode = make_new_node(openfile->current);
size_t extra = 0;
assert(openfile->current != NULL && openfile->current->data != NULL);
assert(openfile->current != NULL && xopenfile->current->data != NULL);
#ifndef NANO_TINY
update_undo(SPLIT, openfile);
/* Do auto-indenting, like the neolithic Turbo Pascal editor. */
if (ISSET(AUTOINDENT)) {
/* If we are breaking the line in the indentation, the new
@ -510,6 +690,153 @@ bool execute_command(const char *command)
return TRUE;
}
void add_undo(undo_type current_action, openfilestruct *fs)
{
int i;
undo *u = nmalloc(sizeof(undo));
char *data;
/* Blow away the old undo stack if we are starting from the middle */
while (fs->undotop != fs->current_undo) {
undo *tmp = fs->undotop;
fs->undotop = fs->undotop->next;
free(tmp->strdata);
free(tmp);
}
u->type = current_action;
u->lineno = fs->current->lineno;
u->begin = fs->current_x;
u->fs = fs->current;
u->next = fs->undotop;
fs->undotop = u;
fs->current_undo = u;
switch (u->type) {
/* We need to start copying data into the undo buffer or we wont be able
to restore it later */
case ADD:
data = charalloc(2);
data[0] = fs->current->data[fs->current_x];
data[1] = '\0';
u->strdata = data;
break;
case DEL:
if (u->begin != strlen(fs->current->data)) {
data = mallocstrncpy(NULL, &fs->current->data[u->begin], 2);
data[1] = '\0';
u->strdata = data;
break;
}
/* Else purposely fall into unsplit code */
current_action = u->type = UNSPLIT;
case UNSPLIT:
if (fs->current->next) {
data = mallocstrcpy(NULL, fs->current->next->data);
u->strdata = data;
}
u->begin = fs->current_x;
break;
case SPLIT:
data = mallocstrcpy(NULL, fs->current->data);
u->strdata = data;
u->begin = fs->current_x;
break;
}
#ifdef DEBUG
fprintf(stderr, "fs->current->data = \"%s\", current_x = %d, u->begin = %d, type = %d\n",
fs->current->data, fs->current_x, u->begin, current_action);
fprintf(stderr, "u->strdata = \"%s\"\n", u->strdata);
fprintf(stderr, "left update_add...\n");
#endif
fs->last_action = current_action;
}
void update_undo(undo_type action, openfilestruct *fs)
{
undo *u;
char *data;
int len = 0;
if (action != fs->last_action) {
add_undo(action, fs);
return;
}
assert(fs->undotop != NULL);
u = fs->undotop;
if (u->fs->data != openfile->current->data) {
add_undo(action, fs);
return;
}
switch (u->type) {
case ADD:
#ifdef DEBUG
fprintf(stderr, "fs->current->data = \"%s\", current_x = %d, u->begin = %d\n",
fs->current->data, fs->current_x, u->begin);
#endif
len = strlen(u->strdata) + 2;
data = nrealloc((void *) u->strdata, len * sizeof(char *));
data[len-2] = fs->current->data[fs->current_x];
data[len-1] = '\0';
u->strdata = (char *) data;
#ifdef DEBUG
fprintf(stderr, "current undo data now \"%s\"\n", u->strdata);
#endif
break;
case DEL:
len = strlen(u->strdata) + 2;
assert(len > 2);
if (fs->current_x == u->begin) {
/* They're deleting */
data = charalloc(len);
strcpy(data, u->strdata);
data[len-2] = fs->current->data[fs->current_x];;
data[len-1] = '\0';
free(u->strdata);
u->strdata = data;
} else if (fs->current_x == u->begin - 1) {
/* They're backspacing */
data = charalloc(len);
data[0] = fs->current->data[fs->current_x];
strcpy(&data[1], u->strdata);
free(u->strdata);
u->strdata = data;
u->begin--;
} else {
/* They deleted something else on the line */
add_undo(DEL, fs);
return;
}
#ifdef DEBUG
fprintf(stderr, "current undo data now \"%s\"\n", u->strdata);
#endif
break;
case SPLIT:
case UNSPLIT:
/* We don't really ever update an enter key press, treat it as a new */
// add_undo(action, fs);
break;
}
#ifdef DEBUG
fprintf(stderr, "Done in udpate_undo (type was %d)\n", action);
#endif
if (fs->last_action != action) {
#ifdef DEBUG
fprintf(stderr, "Starting add_undo for new action as it does not match last_action\n");
#endif
add_undo(action, openfile);
}
fs->last_action = action;
}
#endif /* !NANO_TINY */
#ifndef DISABLE_WRAPPING
@ -2464,3 +2791,4 @@ void do_verbatim_input(void)
free(output);
}