The combining characters (that are zero-width) start at U+0300.
After that it's pretty much chaos, width-wise.
The mbwidth() function is not called for control characters (whose
representation takes up two columns), as they are handled separately.
The calls of mbwidth() that *can* happen with a control character as
argument are only to determine whether the character is zero-width,
and then it doesn't matter whether the exact width is 1 or 2.
An invalid UTF-8 starter byte should not be represented in the same way
as a valid Unicode character.
This fixes https://savannah.gnu.org/bugs/?59832.
Bug existed since two weeks ago, since the mini-bar code was merged.
The first byte of a multi-byte UTF-8 sequence must be in the range
0xC2...0xFF. Any other byte cannot be a starter byte and can thus
immediately be treated as a single byte.
When the tail of the answer still fits exactly on the screen, the ">"
continuation character should not be shown -- also when the start of
the answer is "scrolled off" to the left.
This fixes https://savannah.gnu.org/bugs/?59816.
Bug existed in this form since version 4.0, commit 56181896.
When making small movements in the lower right corner, ncurses can
get confused about where the cursor actually is -- a double-width
character seems to throw its calculations off.
This addresses https://savannah.gnu.org/bugs/?59808.
Bug existed since version 5.4, commit 39705c60.
Show leading dots for the truncated part, or (if there is no room
at all) show just an underscore instead of the file name.
This fixes https://savannah.gnu.org/bugs/?59802.
Bug existed since version 2.9.3, commit 97cbbb0c.
Now all toggle functions have the same name as their corresponding
long command-line option. Also, all names now indicate the effect
of the toggle when it is invoked from a default setting.
When space is too tight to show all three elements, show the report on
the number of lines in preference to the current location and character
code. The latter two will be shown again upon the next keystroke, so
there is little harm in hiding them for a moment.
Having a block cursor present when highlighting a match...
does not look nice. So... hide the cursor until the next
keystroke, unless --showcursor or 'set showcursor' is used.
Not only does the match get highlighted (for better visibility), but
this also allows deleting the match with a single keystroke (^K, or
<Del> or <Bsp> when --zap is used) and then type something else.
This https://savannah.gnu.org/bugs/?59655.
Requested-by: Noam Sondak <noamso@gmail.com>
Remarks are about unsurprising things but it's good to give feedback
on them; "mistakes" are unexpected things, and get colored like an
error; and information is something that the user requested and thus
needs to stay on the status bar until the next keystroke.
For some reason, calling halfdelay() undoes the ISIG mask.
So, mask keyboard interrupts again immediately after the call.
Reported-by: Peter Passchier <peter@passchier.net>
Instead of redisplaying the minibar only upon the next keystroke
(when some feedback message is shown on the status bar), time the
waiting for the keystroke out after four fifths of a second, then
redisplay the minibar and continue the wait.
The bottom window (the prompt bar and the shortcuts) does not shift
its position when line numbers are active, so mouse clicks in this
window should be not be compensated for the line-numbers margin.
This fixes https://savannah.gnu.org/bugs/?59749.
Indirectly-reported-by: ObeliX <ObeliX-@gmx.de>
Bug existed since version 2.7.0, since line numbers were introduced.
Clicking on the cursor toggles the mark, meaning that the flags in
the title bar should be updated when --stateflags is active.
This fixes https://savannah.gnu.org/bugs/?59747.
Indirectly-reported-by: ObeliX <ObeliX-@gmx.de>
Signed-off-by: OIX <ObeliX-@gmx.de>
The state flags are relevant only when editing.
This fixes https://savannah.gnu.org/bugs/?59744.
Indirectly-reported-by: ObeliX <ObeliX-@gmx.de>
Bug existed since version 5.3, since --stateflags was introduced.
This allows using <Esc> <Esc> <letter> in a macro as an alternative
for <Ctrl+letter>, but it does require that one does not type <Esc>
by accident when recording a macro as it might modify the subsequent
keystroke when the macro is replayed.
This fixes https://savannah.gnu.org/bugs/?58904.
Bug existed since version 3.0, commit ecc9211a.
The workaround was for https://savannah.gnu.org/bugs/?51335
(a cursor-misplacement bug), but both an recent Xfce Terminal
and a recent Konsole appear unaffected by the issue. So, drop
the workaround for modern systems.
Checking for the actual version of libvte is too complicated, so
assume that libvte is 0.58 or newer (where the problem is fixed)
when ncurses is 6.2 or newer.
It was only ever needed when the user lied about the size
of the terminal, which should be considered a user error.
It was a workaround for https://savannah.gnu.org/bugs/?48852.
This avoids unnecessarily truncating the last help item on the
very bottom row when there is still plenty of room.
This fixes https://savannah.gnu.org/bugs/?59550.
Bug has been visible since at least version 2.5.1.
Subtract one from the count only if all possible items in the menu
have been counted (item == NULL), meaning that the last item in the
Write-Out menu (the 'discard_buffer' function) has been counted too.
This fixes https://savannah.gnu.org/bugs/?59549.
Bug existed since version 4.5, commit b3ace4d8.
When getopt() does not recognize an option, it returns '?', which means
that '-?' cannot be used as a valid option because any invalid option
would be treated the same way as '-?'.
Spewing out the full help text drowns the "invalid option" message at
the beginning.
This fixes https://savannah.gnu.org/bugs/?59530.
Bug existed since version 5.3, commit 5bd92d4c.
This avoids poor wordings such as "Words: 1 Lines: 1 Chars: 1".
Also, display the numbers in a more logical, ascending order: lines
first, words second, characters third. This is what 'wc' uses, too.
This makes the cursor move smoothly left and right -- instead of
"stuttering" when passing over a zero-width character.
Pressing <Delete> on a normal (spacing) character also deletes
any zero-width characters after it. But pressing <Backspace>
while the cursor is placed after a zero-width character, just
deletes that zero-width character. The latter behavior allows
deleting and retyping just the combining diacritic of a character
instead of the whole character.
This addresses https://savannah.gnu.org/bugs/?50773.
Requested-by: Mike Frysinger <vapier@gentoo.org>
(Yes, the test is for 6.0, but the bug was actually fixed in 5.9,
as far as I remember -- I just wasn't sure and didn't want to bother
building different versions of ncurses myself.)
Those versions are more than five years old. If there are still
machines with those versions, people should upgrade ncurses too
if they want the newest version of nano.
Some linters report a column position (assuming a TAB to be 8 spaces)
instead of a byte index, so make sure that the cursor is not placed
out of bounds when interpreting such a column number as an index.
This fixes https://savannah.gnu.org/bugs/?59419.
Reported-by: Ava McWhorter <qwerty0s.e.m@gmail.com>
Bug existed since version 2.8.1, commit 2439e1e4.
This takes eight extra calls of copy_of(), but saves ten calls of
free(). But more importantly: it avoids an unneeded copying and
then freeing again of the argument after 'titlecolor' and friends.
And in the bargain elide a variable, and make it clearer
what the return value is at two early exit points.
[This change makes use of the fact that TRUE (successful write) == 1
and FALSE (failed write) == 0. But this is already used twenty lines
earlier, for the other call of write_file().]
Web links and email addresses do not belong in the version information.
This has bothered me for a long time. The URL is in the man page, and
bug reports should go to Savannah.
The terminal window in the graphical Debian installer (the default)
produces the same escape sequences as xterm for F1 to F4. Though
TERM is set to xterm, the xterm terminfo data is not available, so
ncurses is unable to translate the sequences for us. :| Therefore,
recognize the relevant raw escape sequences.
Also, eat all bytes of the non-recognized modified function and arrow
keys, so that they do not enter junk into the buffer.
Benno Schulenberg