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Air some long conditionals out a bit. Be more consistent with format().
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Can't get { } since {} implies n isn't assignable.
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The horizontal scroll (hscroll) wasn't initialized properly when the
initial (prefilled) contents of an edit box was longer than the edit box
itself (e.g. when saving with a long path in KCONFIG_CONFIG). Things
snapped back into place once a key was pressed.
Initialize hscroll properly to fix the initial rendering.
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If LC_CTYPE is set to the C locale, try to convert it to a UTF-8 locale.
Use a list of commonly available UTF-8 locales. Give up and use the C
locale if none of them are available.
This fixes curses Unicode I/O issues on systems with bad defaults:
ncurses configures itself from the locale settings, and the C locale
implies ASCII.
The logic mirrors https://www.python.org/dev/peps/pep-0538/. I took the
list of locales to try from the CPython code (in Python/pylifecycle.c).
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Makes it easier to see the menu structure.
Make the indent configurable via a _SUBMENU_INDENT configuration
variable.
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Pressing [/] brings up a dialog with an edit box where a regex can be
entered. The list of matching symbols is always shown below it.
Selecting a symbol and pressing [Enter] jumps directly to it in the menu
tree. If the symbol is invisible, show-all mode is turned on
automatically.
This commit also includes a bunch of more-or-less unrelated changes from
poking around with the code:
- Some redundant styles were merged. Probably wouldn't want to have a
different style for each separator line, for example...
- [ESC] in the top menu now works like [Q]
- Returning to a parent menu now makes sure that the selected row is
visible, even if the terminal was shrunk between entering the child
menu and leaving it.
- A _max_scroll() helper was factored out to reduce code duplication.
It takes a list of items and a window in which the list is
displayed, with one row per item, and returns the minimum scroll
value that will make the final item visible.
- The save dialog now pops up a message to confirm that the save was
successful.
- Lots of minor code nits all over (renamings, etc.)
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Previously, the title of the current menu disappeared off the right edge
of the terminal for long menu paths. Scroll the menu path to the right
if needed to make sure it is always shown.
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Don't bother to show the save-and-quit dialog.
Also quit immediately if the configuration hasn't been changed since the
last time it was explicitly saved with the save dialog.
Rename _set_node() to _set_node_tri_val(), as the old name gets
confusing with the new _set_val() function.
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Works the same as in mconf.
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When show-all mode is enabled, all items in the current menu are shown,
including promptless and invisible items. Promptless items are shown
with their name within <> brackets in place of the prompt.
This will make it possible to jump to invisible items once the jump-to
feature is added. It is also a handy feature on its own.
.config loading from within the interface will make use of it as well,
in case the current menu becomes complete invisible.
Piggyback various code cleanups. Rename _visible* to _shown*, as it now
includes invisible items in show-all mode.
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Uses the 'curses' module, which is in the Python standard library. Only
Python 3 is supported, mostly due to Unicode support.
Windows support is provided through an external package which adds
support for the 'curses' module on Windows.
See the changes and the docstring in the newly added menuconfig.py for
more information.
Piggyback a README notes mentioning that Kconfiglib supports Unicode.
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