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Going to the correct positions for undoing and redoing cuts and 

pastes.  This fixes many undo problems and Savannah bug #25585.
*Patch by Mark Majeres.*


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4893 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
This commit is contained in:
Benno Schulenberg 2014-05-15 20:00:46 +00:00
parent 4774ca645f
commit 6081546161
9 changed files with 158 additions and 101 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
2014-05-15 Mark Majeres <mark@engine12.com>
* src/*, but mainly src/text.c (undo_cut, redo_cut, do_undo, do_redo):
Go to the correct positions for undoing/redoing the cuts and pastes.
This fixes several undo problems and Savannah bug #25585.
2014-05-15 Benno Schulenberg <bensberg@justemail.net>
* doc/syntax/c.nanorc: Improve the magic regex, plus tweaks.
* src/color.c (color_update): Adjust a comment, and be clearer.

9
src/cut.c
View File

@ -44,6 +44,9 @@ void cutbuffer_reset(void)
* current line. */
void cut_line(void)
{
if(!openfile->mark_begin)
openfile->mark_begin = openfile->current;
if (openfile->current != openfile->filebot)
move_to_filestruct(&cutbuffer, &cutbottom, openfile->current, 0,
openfile->current->next, 0);
@ -204,7 +207,7 @@ void do_cut_text(
if (!old_no_newlines)
UNSET(NO_NEWLINES);
} else if (!undoing)
update_undo(CUT);
update_undo(cut_till_end ? CUT_EOF : CUT);
/* Leave the text in the cutbuffer, and mark the file as
* modified. */
@ -249,7 +252,7 @@ void do_copy_text(void)
/* Cut from the current cursor position to the end of the file. */
void do_cut_till_end(void)
{
add_undo(CUT);
add_undo(CUT_EOF);
do_cut_text(FALSE, TRUE, FALSE);
}
#endif /* !NANO_TINY */
@ -264,7 +267,7 @@ void do_uncut_text(void)
return;
#ifndef NANO_TINY
update_undo(UNCUT);
add_undo(PASTE);
#endif
/* Add a copy of the text in the cutbuffer to the current filestruct

2
src/move.c
View File

@ -570,7 +570,7 @@ void do_down(
#endif
/* If we're at the bottom of the file, get out. */
if (openfile->current == openfile->filebot)
if (openfile->current == openfile->filebot || !openfile->current->next)
return;
assert(ISSET(SOFTWRAP) || openfile->current_y == openfile->current->lineno - openfile->edittop->lineno);

6
src/nano.c
View File

@ -2030,7 +2030,7 @@ void do_output(char *output, size_t output_len, bool allow_cntrls)
set_modified();
#ifndef NANO_TINY
update_undo(ADD);
add_undo(ADD);
/* Note that current_x has not yet been incremented. */
if (openfile->mark_set && openfile->current ==
@ -2041,6 +2041,10 @@ void do_output(char *output, size_t output_len, bool allow_cntrls)
openfile->current_x += char_buf_len;
#ifndef NANO_TINY
update_undo(ADD);
#endif
#ifndef DISABLE_WRAPPING
/* If we're wrapping text, we need to call edit_refresh(). */
if (!ISSET(NO_WRAP))

6
src/nano.h
View File

@ -187,7 +187,7 @@ typedef enum {
} function_type;
typedef enum {
ADD, DEL, REPLACE, SPLIT, UNSPLIT, CUT, UNCUT, ENTER, INSERT, OTHER
ADD, DEL, REPLACE, SPLIT, UNSPLIT, CUT, CUT_EOF, PASTE, ENTER, INSERT, OTHER
} undo_type;
typedef struct color_pair {
@ -324,7 +324,7 @@ typedef struct undo {
ssize_t lineno;
undo_type type;
/* What type of undo this was. */
int begin;
size_t begin;
/* Where did this action begin or end. */
char *strdata;
/* String type data we will use for copying the affected line back. */
@ -344,7 +344,7 @@ typedef struct undo {
/* Was this a cut to end? */
ssize_t mark_begin_lineno;
/* copy copy copy */
ssize_t mark_begin_x;
size_t mark_begin_x;
/* Another shadow variable. */
struct undo *next;
} undo;

1
src/proto.h
View File

@ -604,6 +604,7 @@ void do_gotolinecolumn_void(void);
void do_gotopos(ssize_t pos_line, size_t pos_x, ssize_t pos_y, size_t
pos_pww);
#endif
void goto_line_posx(ssize_t line, size_t pos_x);
#ifndef NANO_TINY
bool find_bracket_match(bool reverse, const char *bracket_set);
void do_find_bracket(void);

14
src/search.c
View File

@ -1008,6 +1008,20 @@ void do_replace(void)
search_replace_abort();
}
/* Go to the specified line and x position. */
void goto_line_posx(ssize_t line, size_t pos_x)
{
for (openfile->current = openfile->fileage; openfile->current != openfile->filebot &&
openfile->current->next != NULL && line > 1; line--)
openfile->current = openfile->current->next;
openfile->current_x = pos_x;
openfile->placewewant = xplustabs();
edit_refresh_needed = TRUE;
edit_refresh();
}
/* Go to the specified line and column, or ask for them if interactive
* is TRUE. Save the x-coordinate and y-coordinate if save_pos is TRUE.
* Update the screen afterwards if allow_update is TRUE. Note that both

211
src/text.c
View File

@ -112,9 +112,8 @@ void do_delete(void)
edit_refresh_needed = TRUE;
openfile->current->data = charealloc(openfile->current->data,
openfile->current_x + strlen(foo->data) + 1);
strcpy(openfile->current->data + openfile->current_x,
foo->data);
strlen(openfile->current->data) + strlen(foo->data) + 1);
strcat(openfile->current->data, foo->data);
#ifndef NANO_TINY
if (openfile->mark_set && openfile->mark_begin ==
openfile->current->next) {
@ -359,6 +358,9 @@ void do_unindent(void)
do_indent(-tabsize);
}
#define redo_paste undo_cut
#define undo_paste redo_cut
/* Undo a cut, or redo an uncut. */
void undo_cut(undo *u)
{
@ -373,10 +375,7 @@ void undo_cut(undo *u)
;
/* Get to where we need to uncut from. */
if (u->mark_set && u->mark_begin_lineno < u->lineno)
do_gotolinecolumn(u->mark_begin_lineno, u->mark_begin_x+1, FALSE, FALSE, FALSE, FALSE);
else
do_gotolinecolumn(u->lineno, u->begin+1, FALSE, FALSE, FALSE, FALSE);
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
copy_from_filestruct(cutbuffer);
free_filestruct(cutbuffer);
@ -386,39 +385,26 @@ void undo_cut(undo *u)
/* Redo a cut, or undo an uncut. */
void redo_cut(undo *u)
{
int i;
filestruct *t, *c;
/* If we cut the magicline, we may as well not crash. :/ */
if (!u->cutbuffer)
return;
do_gotolinecolumn(u->lineno, u->begin+1, FALSE, FALSE, FALSE, FALSE);
goto_line_posx(u->lineno, u->begin);
if (ISSET(NO_NEWLINES) && openfile->current->lineno != u->lineno) {
openfile->current_x = strlen(openfile->current->data);
openfile->placewewant = xplustabs();
}
openfile->mark_set = u->mark_set;
if (cutbuffer)
free(cutbuffer);
cutbuffer = NULL;
/* Move ahead the same number of lines we had if a marked cut. */
if (u->mark_set) {
for (i = 1, t = openfile->fileage; i != u->mark_begin_lineno; i++)
t = t->next;
openfile->mark_begin = t;
} else if (!u->to_end) {
/* Here we have a regular old potentially multi-line ^K cut.
* We'll need to trick nano into thinking it's a marked cut,
* to cut more than one line again. */
for (c = u->cutbuffer, t = openfile->current; c->next != NULL && t->next != NULL; ) {
#ifdef DEBUG
fprintf(stderr, "Advancing, lineno = %lu, data = \"%s\"\n", (unsigned long) t->lineno, t->data);
#endif
c = c->next;
t = t->next;
}
openfile->mark_begin = t;
openfile->mark_begin_x = 0;
openfile->mark_begin = fsfromline(u->mark_begin_lineno);
if (!ISSET(CUT_TO_END))
openfile->mark_set = TRUE;
}
openfile->mark_begin_x = u->mark_begin_x;
do_cut_text(FALSE, u->to_end, TRUE);
@ -431,8 +417,9 @@ void redo_cut(undo *u)
/* Undo the last thing(s) we did. */
void do_undo(void)
{
bool gotolinecolumn = FALSE;
undo *u = openfile->current_undo;
filestruct *f = openfile->current, *t;
filestruct *t = 0;
int len = 0;
char *undidmsg, *data;
filestruct *oldcutbuffer = cutbuffer, *oldcutbottom = cutbottom;
@ -442,14 +429,9 @@ void do_undo(void)
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(_("Internal error: can't match line %d. Please save your work."), u->lineno);
filestruct *f = fsfromline(u->mark_begin_lineno);
if (!f) {
statusbar(_("Internal error: can't match line %d. Please save your work."), u->mark_begin_lineno);
return;
}
#ifdef DEBUG
@ -467,6 +449,7 @@ void do_undo(void)
strcpy(&data[u->begin], &f->data[u->begin + strlen(u->strdata)]);
free(f->data);
f->data = data;
goto_line_posx(u->lineno, u->begin);
break;
case DEL:
undidmsg = _("text delete");
@ -480,6 +463,7 @@ void do_undo(void)
f->data = data;
if (u->xflags == UNdel_backspace)
openfile->current_x += strlen(u->strdata);
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x + 1);
break;
#ifndef DISABLE_WRAPPING
case SPLIT:
@ -494,26 +478,28 @@ void do_undo(void)
delete_node(foo);
}
renumber(f);
gotolinecolumn = TRUE;
break;
#endif /* !DISABLE_WRAPPING */
case UNSPLIT:
undidmsg = _("line join");
t = make_new_node(f);
t->data = mallocstrcpy(NULL, u->strdata);
data = mallocstrncpy(NULL, f->data, u->begin);
data = mallocstrncpy(NULL, f->data, u->begin + 1);
data[u->begin] = '\0';
free(f->data);
f->data = data;
splice_node(f, t, f->next);
renumber(f);
gotolinecolumn = TRUE;
break;
case CUT_EOF:
case CUT:
undidmsg = _("text cut");
undo_cut(u);
break;
case UNCUT:
case PASTE:
undidmsg = _("text uncut");
redo_cut(u);
undo_paste(u);
break;
case ENTER:
undidmsg = _("line break");
@ -524,6 +510,7 @@ void do_undo(void)
unlink_node(foo);
delete_node(foo);
}
goto_line_posx(u->lineno, u->begin);
break;
case INSERT:
undidmsg = _("text insert");
@ -535,7 +522,7 @@ void do_undo(void)
openfile->mark_begin = fsfromline(u->lineno + u->mark_begin_lineno - 1);
openfile->mark_begin_x = 0;
openfile->mark_set = TRUE;
do_gotolinecolumn(u->lineno, u->begin+1, FALSE, FALSE, FALSE, FALSE);
goto_line_posx(u->lineno, u->begin);
cut_marked();
u->cutbuffer = cutbuffer;
u->cutbottom = cutbottom;
@ -545,6 +532,7 @@ void do_undo(void)
break;
case REPLACE:
undidmsg = _("text replace");
goto_line_posx(u->lineno, u->begin);
data = u->strdata;
u->strdata = f->data;
f->data = data;
@ -555,17 +543,19 @@ void do_undo(void)
}
renumber(f);
do_gotolinecolumn(u->lineno, u->begin, FALSE, FALSE, FALSE, TRUE);
if (gotolinecolumn)
do_gotolinecolumn(u->lineno, u->begin, FALSE, FALSE, FALSE, TRUE);
statusbar(_("Undid action (%s)"), undidmsg);
openfile->current_undo = openfile->current_undo->next;
openfile->last_action = OTHER;
set_modified();
}
/* Redo the last thing(s) we undid. */
void do_redo(void)
{
bool gotolinecolumn = FALSE;
undo *u = openfile->undotop;
filestruct *f = openfile->current;
int len = 0;
char *undidmsg, *data;
@ -580,14 +570,9 @@ void do_redo(void)
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(_("Internal error: can't match line %d. Please save your work."), u->lineno);
filestruct *f = fsfromline(u->mark_begin_lineno);
if (!f) {
statusbar(_("Internal error: can't match line %d. Please save your work."), u->mark_begin_lineno);
return;
}
#ifdef DEBUG
@ -605,6 +590,7 @@ void do_redo(void)
strcpy(&data[u->begin + strlen(u->strdata)], &f->data[u->begin]);
free(f->data);
f->data = data;
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
break;
case DEL:
undidmsg = _("text delete");
@ -614,10 +600,13 @@ void do_redo(void)
strcpy(&data[u->begin], &f->data[u->begin + strlen(u->strdata)]);
free(f->data);
f->data = data;
openfile->current_x = u->begin;
openfile->placewewant = xplustabs();
goto_line_posx(u->lineno, u->begin);
break;
case ENTER:
undidmsg = _("line break");
do_gotolinecolumn(u->lineno, u->begin+1, FALSE, FALSE, FALSE, FALSE);
goto_line_posx(u->lineno, u->begin);
do_enter(TRUE);
break;
#ifndef DISABLE_WRAPPING
@ -627,53 +616,55 @@ void do_redo(void)
prepend_wrap = TRUE;
do_wrap(f, TRUE);
renumber(f);
gotolinecolumn = TRUE;
break;
#endif /* !DISABLE_WRAPPING */
case UNSPLIT:
undidmsg = _("line join");
len = strlen(f->data) + strlen(u->strdata + 1);
data = charalloc(len);
strcpy(data, f->data);
strcat(data, u->strdata);
free(f->data);
f->data = data;
len = strlen(f->data) + strlen(u->strdata) + 1;
f->data = charealloc(f->data, len);
strcat(f->data, u->strdata);
if (f->next != NULL) {
filestruct *tmp = f->next;
unlink_node(tmp);
delete_node(tmp);
}
renumber(f);
gotolinecolumn = TRUE;
break;
case CUT_EOF:
case CUT:
undidmsg = _("text cut");
redo_cut(u);
break;
case UNCUT:
case PASTE:
undidmsg = _("text uncut");
undo_cut(u);
redo_paste(u);
break;
case REPLACE:
undidmsg = _("text replace");
data = u->strdata;
u->strdata = f->data;
f->data = data;
goto_line_posx(u->lineno, u->begin);
break;
case INSERT:
undidmsg = _("text insert");
do_gotolinecolumn(u->lineno, u->begin+1, FALSE, FALSE, FALSE, FALSE);
goto_line_posx(u->lineno, u->begin);
copy_from_filestruct(u->cutbuffer);
openfile->placewewant = xplustabs();
break;
default:
undidmsg = _("Internal error: unknown type. Please save your work.");
break;
}
do_gotolinecolumn(u->lineno, u->begin, FALSE, FALSE, FALSE, TRUE);
if (gotolinecolumn)
do_gotolinecolumn(u->lineno, u->begin, FALSE, FALSE, FALSE, TRUE);
statusbar(_("Redid action (%s)"), undidmsg);
openfile->current_undo = u;
openfile->last_action = OTHER;
set_modified();
}
#endif /* !NANO_TINY */
@ -841,7 +832,6 @@ void add_undo(undo_type current_action)
undo *u;
char *data;
openfilestruct *fs = openfile;
static undo *last_cutu = NULL;
/* Last thing we cut to set up the undo for uncut. */
ssize_t wrap_loc;
/* For calculating split beginning. */
@ -852,8 +842,9 @@ void add_undo(undo_type current_action)
/* Ugh, if we were called while cutting not-to-end, non-marked, and
* on the same lineno, we need to abort here. */
u = fs->current_undo;
if (current_action == CUT && u && u->type == CUT
&& !u->mark_set && u->lineno == fs->current->lineno)
if (u && u->mark_begin_lineno == fs->current->lineno &&
((current_action == CUT && u->type == CUT && !u->mark_set) ||
(current_action == ADD && u->type == ADD && u->mark_begin_x == fs->current_x)))
return;
/* Blow away the old undo stack if we are starting from the middle. */
@ -880,8 +871,8 @@ void add_undo(undo_type current_action)
u->cutbuffer = NULL;
u->cutbottom = NULL;
u->mark_set = 0;
u->mark_begin_lineno = 0;
u->mark_begin_x = 0;
u->mark_begin_lineno = fs->current->lineno;
u->mark_begin_x = fs->current_x;
u->xflags = 0;
u->to_end = FALSE;
@ -890,8 +881,7 @@ void add_undo(undo_type current_action)
* or we won't be able to restore it later. */
case ADD:
data = charalloc(2);
data[0] = fs->current->data[fs->current_x];
data[1] = '\0';
data[0] = '\0';
u->strdata = data;
break;
case DEL:
@ -929,21 +919,43 @@ void add_undo(undo_type current_action)
data = mallocstrcpy(NULL, fs->current->data);
u->strdata = data;
break;
case CUT_EOF:
u->to_end = TRUE;
case CUT:
u->mark_set = openfile->mark_set;
if (u->mark_set) {
u->mark_begin_lineno = openfile->mark_begin->lineno;
u->mark_begin_x = openfile->mark_begin_x;
}
u->to_end = (ISSET(CUT_TO_END)) ? TRUE : FALSE;
last_cutu = u;
else if (!ISSET(CUT_TO_END) && !u->to_end) {
/* The entire line is being cut regardless of the cursor position. */
u->begin = 0;
u->mark_begin_x = 0;
}
break;
case UNCUT:
if (!last_cutu)
case PASTE:
if (!cutbuffer)
statusbar(_("Internal error: cannot set up uncut. Please save your work."));
else if (last_cutu->type == CUT) {
u->cutbuffer = last_cutu->cutbuffer;
u->cutbottom = last_cutu->cutbottom;
else {
if (u->cutbuffer)
free(u->cutbuffer);
u->cutbuffer = copy_filestruct(cutbuffer);
u->mark_begin_lineno = fs->current->lineno;
u->mark_begin_x = fs->current_x;
u->lineno = fs->current->lineno + cutbottom->lineno - cutbuffer->lineno;
filestruct *fs_buff = cutbuffer;
if (fs_buff->lineno == cutbottom->lineno)
u->begin = fs->current_x + get_totsize(fs_buff,cutbottom);
else {
/* Advance fs_buff to the last line in the cutbuffer. */
while (fs_buff->lineno != cutbottom->lineno && fs_buff->next != NULL)
fs_buff = fs_buff->next;
assert(fs_buff->next != NULL);
u->begin = get_totsize(fs_buff,cutbottom);
}
u->mark_set = TRUE;
}
break;
case ENTER:
@ -1004,12 +1016,14 @@ void update_undo(undo_type action)
#endif
len = strlen(u->strdata) + 2;
data = (char *) nrealloc((void *) u->strdata, len * sizeof(char *));
data[len-2] = fs->current->data[fs->current_x];
data[len-2] = fs->current->data[fs->current_x - 1];
data[len-1] = '\0';
u->strdata = (char *) data;
#ifdef DEBUG
fprintf(stderr, "current undo data now \"%s\"\n", u->strdata);
#endif
u->mark_begin_lineno = fs->current->lineno;
u->mark_begin_x = fs->current_x;
break;
case DEL:
len = strlen(u->strdata) + 2;
@ -1051,18 +1065,37 @@ void update_undo(undo_type action)
fprintf(stderr, "current undo data now \"%s\"\nu->begin = %d\n", u->strdata, u->begin);
#endif
break;
case CUT_EOF:
case CUT:
if (!cutbuffer)
break;
if (u->cutbuffer)
free(u->cutbuffer);
u->cutbuffer = copy_filestruct(cutbuffer);
/* Compute cutbottom for the uncut using our copy. */
for (u->cutbottom = u->cutbuffer; u->cutbottom->next != NULL; u->cutbottom = u->cutbottom->next)
;
if (u->mark_set) {
/* If the "marking" operation was from right-->left or
* bottom-->top, then swap the mark points. */
if ((u->lineno == u->mark_begin_lineno && u->begin < u->mark_begin_x)
|| u->lineno < u->mark_begin_lineno) {
size_t x_loc = u->begin;
u->begin = u->mark_begin_x;
u->mark_begin_x = x_loc;
ssize_t line = u->lineno;
u->lineno = u->mark_begin_lineno;
u->mark_begin_lineno = line;
}
} else if (!ISSET(CUT_TO_END)) {
/* Compute cutbottom for the uncut using our copy. */
u->cutbottom = u->cutbuffer;
while (u->cutbottom->next != NULL)
u->cutbottom = u->cutbottom->next;
if (!u->to_end)
u->lineno++;
}
break;
case REPLACE:
case UNCUT:
case PASTE:
add_undo(action);
break;
case INSERT:
@ -1085,14 +1118,8 @@ void update_undo(undo_type action)
#ifdef DEBUG
fprintf(stderr, "Done in update_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);
}
fs->last_action = action;
}
#endif /* !NANO_TINY */

5
src/utils.c
View File

@ -476,7 +476,10 @@ size_t get_page_start(size_t column)
* current_x. */
size_t xplustabs(void)
{
return strnlenpt(openfile->current->data, openfile->current_x);
if (openfile->current)
return strnlenpt(openfile->current->data, openfile->current_x);
else
return 0;
}
/* Return the index in s of the character displayed at the given column,