Allow the user to record and run a single macro.  The default binding
for starting and stopping the recording is M-: (Alt + colon) and for
running the macro M-; (Alt + semicolon).

This fulfills https://savannah.gnu.org/bugs/?50314

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Requested-by: Peter Passchier <peter@passchier.net>
Signed-off-by: Marco Diego Aurélio Mesquita <marcodiegomesquita@gmail.com>
Signed-off-by: Benno Schulenberg <bensberg@telfort.nl>

^S will be the first thing people will try for saving a file,
and ^Q is somewhat mnemonic because it is to the left of ^W:
it searches backward.

Make these keystrokes available also in the tiny version.

Before writing a file out, nano should check that the file on disk
hasn't been modified since it was read -- not only for the normal
"Write Out" action (^O), but also for "Save File" (future ^S) and
for "Save and Exit" (^X when --tempfile is used).

When writing fails and --tempfile is in effect, don't go on to prompt
for a file name; instead let the user decide what she wants to do.

This fixes https://savannah.gnu.org/bugs/?51040

.
Signed-off-by: Viorel Bota <botaviorel@gmail.com>
Signed-off-by: Benno Schulenberg <bensberg@telfort.nl>

The basic idea is that the cursor is always off, except when it needs
to be on: when waiting for text input, and in a few other cases: when
something was searched and found in the help viewer, and in the file
browser when option -g is in effect.

This fixes https://savannah.gnu.org/bugs/?51923

.
Reported-by: Mike Frysinger <vapier@gentoo.org>

Signed-off-by: Marco Diego Aurélio Mesquita <marcodiegomesquita@gmail.com>

When multiple files were open and [x/n] was being shown in the title
bar, don't show nano's name and version number when just one buffer
remains open, but show [1/1] instead.  It is less surprising.

When multiple buffers are open, replace nano's name and version number
with an indication how many buffers are open preceded by the sequence
number of the current buffer.
Signed-off-by: Marco Diego Aurélio Mesquita <marcodiegomesquita@gmail.com>
Signed-off-by: Benno Schulenberg <bensberg@telfort.nl>

The function does not contain any comment-specific code, so it can
be used to handle any kind of multiline undo item.

Also, extend the undo group structure to contain an array of strings,
one for each line in the group.  When indent/unindent is hooked up to
the undo/redo code, this will allow the latter to restore the exact
original indents.

And use these constants in another context too.

Also bind 'N' to a backward re-search, while retaining 'n' for a
forward one,  This matches the functionality in the help viewer.

This also fixes https://savannah.gnu.org/bugs/?51735

.
Reported-by: Urja Rannikko <urjaman@gmail.com>
Signed-off-by: Urja Rannikko <urjaman@gmail.com>
Signed-off-by: Benno Schulenberg <bensberg@telfort.nl>

Further, slightly reword an error message so it is appropriate also
when an out-of-bounds file is specified on the command line.

There is no need to retain the (relative) path that the user
specified, so we can simply reuse that variable.

Match three variable names in the prototypes
to the changd ones in their functions in utils.c.

Include the shortcut for 'Uncut' into most menus, and add an uncut
function for the status bar, so that it becomes possible to paste
the first line of the cutbuffer at any text-input prompt.

This fulfills https://savannah.gnu.org/bugs/?48501

.
Requested-by: Benno Schulenberg <bensberg@telfort.nl>
Signed-off-by: Rishabh Dave <rishabhddave@gmail.com>

Commit 28beb3f9 added the 'forreal' parameter to prevent spotlight() from
placing the cursor wrongly due to an invalid placewewant.  However, since
the variable-width softwrap overhaul (specifically, since commit 8490f4ac),
place_the_cursor() no longer checks placewewant, so the parameter is no
longer needed.

Furthermore, dropping 'forreal' and thus always setting current_y won't
affect the operation of spotlight(), since the only functions that use
spotlight() (do_replace_loop() and do_int_spell_fix()) both call
edit_refresh() beforehand, which means that current_y will already
have been set to the value it will be set to again.

Since all indentation and unindentation is by a tab, or by a tab's
worth of spaces, use tabsize directly.

This is the first step toward splitting them into two dedicated
functions, instead of letting do_indent() handle both cases.

And then elide the function entirely as it's called just once.

spotlight() now displays softwrapped lines chunk by chunk instead of all
at once.  Since softwrapped lines are no longer of constant width, the
latter approach would fail if softwrapping breaks the spotlighted text.

Instead of taking a string, spotlight() now takes the starting and ending
columns of that string.  Also, its handling of softwrapped lines is now
split off into a separate function, spotlight_softwrapped().

Add the new function actual_last_column() to accomplish this.

get_chunk_row() replaces the formula "column / editwincols".

get_chunk_leftedge() replaces "(column / editwincols) * editwincols".

get_last_chunk_row() replaces "strlenpt() / editwincols".

get_last_chunk_leftedge() replaces "(strlenpt() / editwincols) * editwincols".

This prepares us for any changes in those formulas, and for more such
functions later.

The new function find_softwrap_breakpoint() returns the column number
of the last position in screen range where we can wrap the given text
without breaking a two-column character in half (as was done until now).
The returned column number is the leftedge of the next softwrapped chunk.

If the end of the text is reached while searching for a wrapping point,
the parameter end_of_line is set to TRUE.

The new function get_chunk() uses find_softwrap_breakpoint() to find the
row and leftedge corresponding to a given column of a given line.

Achieve this by making the suppression flag global, so that we can
just reset it instead of making an improper call of do_cursorpos().

This fixes the secondary part of https://savannah.gnu.org/bugs/?51134.

When spotlighting the string to be replaced, placewewant isn't valid,
so tell place_the_cursor() to ignore its value to avoid the cursor
getting mistakenly placed at the beginning of the next row.

This fixes https://savannah.gnu.org/bugs/?50997

.
Reported-by: David Lawrence Ramsey <pooka109@gmail.com>

Also, allow rebinding the word and block jumping functions
in the tiny version when nanorc files are reenabled.