diff --git a/src/cut.c b/src/cut.c
index 9fc9db4cc4d7a6aac1973702f70791af1969316f..0d07a1adbfef082b9f4ca1704bdf2d9cc63d71f2 100644
--- a/src/cut.c
+++ b/src/cut.c
@@ -258,7 +258,7 @@ void do_uncut_text(void)
{
ssize_t was_lineno = openfile->current->lineno;
- /* If the cutbuffer is empty, get out. */
+ /* If the cutbuffer is empty, there is nothing to do. */
if (cutbuffer == NULL)
return;
@@ -277,8 +277,7 @@ void do_uncut_text(void)
if (openfile->current->lineno - was_lineno < editwinrows)
focusing = FALSE;
- /* Set the current place we want to where the text from the
- * cutbuffer ends. */
+ /* Set the desired x position to where the pasted text ends. */
openfile->placewewant = xplustabs();
/* Mark the file as modified. */
diff --git a/src/files.c b/src/files.c
index acf51dcb102a5aa87bf6a3beaab2f5bfbfaa5d55..840d6bfed588020f2df306e9b187744268ed8fc7 100644
--- a/src/files.c
+++ b/src/files.c
@@ -906,8 +906,7 @@ void read_file(FILE *f, int fd, const char *filename, bool undoable, bool checkw
openfile->current_x = 0;
}
- /* Set the current place we want to the end of the last line of the
- * file we inserted. */
+ /* Set the desired x position at the end of what was inserted. */
openfile->placewewant = xplustabs();
if (!writable)
@@ -2978,7 +2977,7 @@ bool writehist(FILE *hist, const filestruct *head)
{
const filestruct *item;
- /* Write a history list from the oldest entry to the newest. */
+ /* Write a history list, from the oldest item to the newest. */
for (item = head; item != NULL; item = item->next) {
size_t length = strlen(item->data);
diff --git a/src/proto.h b/src/proto.h
index 126295ff3429b525de8d0414dac45985b5e8f355..b34db490385dd52e639bed99c283f99126fcab3d 100644
--- a/src/proto.h
+++ b/src/proto.h
@@ -348,7 +348,7 @@ const char *tail(const char *path);
#ifndef DISABLE_HISTORIES
char *histfilename(void);
void load_history(void);
-bool writehist(FILE *hist, const filestruct *histhead);
+bool writehist(FILE *hist, const filestruct *head);
void save_history(void);
int check_dotnano(void);
void load_poshistory(void);
@@ -743,8 +743,8 @@ void statusline(message_type importance, const char *msg, ...);
void bottombars(int menu);
void onekey(const char *keystroke, const char *desc, int length);
void reset_cursor(void);
-void edit_draw(filestruct *fileptr, const char *converted, int
- line, size_t start);
+void edit_draw(filestruct *fileptr, const char *converted,
+ int line, size_t from_col);
int update_line(filestruct *fileptr, size_t index);
bool need_horizontal_scroll(const size_t old_column, const size_t new_column);
void edit_scroll(scroll_dir direction, ssize_t nlines);
diff --git a/src/text.c b/src/text.c
index 26dab10ec023104f7975f562092578393ba38edd..9ec43b0703296c7027eb5ac604881f770172a802 100644
--- a/src/text.c
+++ b/src/text.c
@@ -823,10 +823,12 @@ void do_undo(void)
statusline(HUSH, _("Undid action (%s)"), undidmsg);
renumber(f);
+
openfile->current_undo = openfile->current_undo->next;
openfile->last_action = OTHER;
openfile->mark_set = FALSE;
openfile->placewewant = xplustabs();
+
openfile->totsize = u->wassize;
set_modified();
}
@@ -974,6 +976,7 @@ void do_redo(void)
openfile->last_action = OTHER;
openfile->mark_set = FALSE;
openfile->placewewant = xplustabs();
+
openfile->totsize = u->newsize;
set_modified();
}
diff --git a/src/winio.c b/src/winio.c
index 070949f9fa98769a824ec54a2f1138c46766c6c6..194d716f10872b08b6952de459894a5268429abc 100644
--- a/src/winio.c
+++ b/src/winio.c
@@ -2294,8 +2294,8 @@ void reset_cursor(void)
* character of this page. That is, the first character of converted
* corresponds to character number actual_x(fileptr->data, from_col) of the
* line. */
-void edit_draw(filestruct *fileptr, const char *converted, int
- line, size_t from_col)
+void edit_draw(filestruct *fileptr, const char *converted,
+ int line, size_t from_col)
{
#if !defined(NANO_TINY) || !defined(DISABLE_COLOR)
size_t from_x = actual_x(fileptr->data, from_col);
@@ -2483,8 +2483,8 @@ void edit_draw(filestruct *fileptr, const char *converted, int
while (TRUE) {
index += startmatch.rm_so;
startmatch.rm_eo -= startmatch.rm_so;
- if (regexec(varnish->end, start_line->data +
- index + startmatch.rm_eo, 0, NULL,
+ if (regexec(varnish->end, start_line->data + index +
+ startmatch.rm_eo, 0, NULL,
(index + startmatch.rm_eo == 0) ?
0 : REG_NOTBOL) == REG_NOMATCH)
/* No end found after this start. */
@@ -2497,8 +2497,8 @@ void edit_draw(filestruct *fileptr, const char *converted, int
}
/* Indeed, there is a start without an end on that line. */
- /* We've already checked that there is no end before fileptr
- * and after the start. But is there an end after the start
+ /* We've already checked that there is no end between the start
+ * and the current line. But is there an end after the start
* at all? We don't paint unterminated starts. */
while (end_line != NULL && regexec(varnish->end, end_line->data,
1, &endmatch, 0) == REG_NOMATCH)
@@ -2557,9 +2557,8 @@ void edit_draw(filestruct *fileptr, const char *converted, int
* the beginning of the line. */
endmatch.rm_so += startmatch.rm_eo;
endmatch.rm_eo += startmatch.rm_eo;
- /* There is an end on this line. But does
- * it appear on this page, and is the match
- * more than zero characters long? */
+ /* Only paint the match if it is visible on screen and
+ * it is more than zero characters long. */
if (endmatch.rm_eo > from_x &&
endmatch.rm_eo > startmatch.rm_so) {
paintlen = actual_x(thetext, strnlenpt(fileptr->data,
@@ -2662,15 +2661,12 @@ void edit_draw(filestruct *fileptr, const char *converted, int
int update_line(filestruct *fileptr, size_t index)
{
int line = 0;
- /* The line in the edit window that we want to update. */
+ /* The row in the edit window we will be updating. */
int extralinesused = 0;
char *converted;
- /* fileptr->data converted to have tabs and control characters
- * expanded. */
+ /* The data of the line with tabs and control characters expanded. */
size_t page_start;
- assert(fileptr != NULL);
-
#ifndef NANO_TINY
if (ISSET(SOFTWRAP)) {
filestruct *tmp;
@@ -2795,8 +2791,6 @@ void edit_scroll(scroll_dir direction, ssize_t nlines)
ssize_t i;
filestruct *foo;
- assert(nlines > 0);
-
/* Part 1: nlines is the number of lines we're going to scroll the
* text of the edit window. */
@@ -2856,12 +2850,10 @@ void edit_scroll(scroll_dir direction, ssize_t nlines)
if (nlines > editwinrows)
nlines = editwinrows;
- /* If we scrolled up, we're on the line before the scrolled
- * region. */
+ /* If we scrolled up, we're on the line before the scrolled region. */
foo = openfile->edittop;
- /* If we scrolled down, move down to the line before the scrolled
- * region. */
+ /* If we scrolled down, move down to the line before the scrolled region. */
if (direction == DOWNWARD) {
for (i = editwinrows - nlines; i > 0 && foo != NULL; i--)
foo = foo->next;
@@ -2873,8 +2865,8 @@ void edit_scroll(scroll_dir direction, ssize_t nlines)
* blank, so we don't need to draw it unless the mark is on or we're
* not on the first page. */
for (i = nlines; i > 0 && foo != NULL; i--) {
- if ((i == nlines && direction == DOWNWARD) || (i == 1 &&
- direction == UPWARD)) {
+ if ((i == nlines && direction == DOWNWARD) ||
+ (i == 1 && direction == UPWARD)) {
if (need_horizontal_scroll(openfile->placewewant, 0))
update_line(foo, (foo == openfile->current) ?
openfile->current_x : 0);
@@ -2883,6 +2875,7 @@ void edit_scroll(scroll_dir direction, ssize_t nlines)
openfile->current_x : 0);
foo = foo->next;
}
+
compute_maxrows();
}