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.
This fixes https://savannah.gnu.org/bugs/?59769.
Reported-by: Tiago Almeida <tjamadeira@gmail.com>
Bug existed since version 5.0, since --bookstyle was introduced.
The list of bugs is quite short these days, and most of them are
feature requests, so asking the user to check whether a particular
problem has already been reported doesn't make much sense.
The distinction between a stable series (even minor number) and
a development series (uneven) was abandonned five years ago.
This information is no longer helpful.
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.
Benno Schulenberg