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32527: zcalc-auto-insert key binding for use in zcalc

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Peter Stephenson 2014-04-07 09:58:30 +01:00
parent 21d01000be
commit 47c440aa2a
4 changed files with 36 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2014-04-07 Peter Stephenson <p.stephenson@samsung.com>
* 32527: Doc/Zsh/contrib.yo, Functions/Misc/zcalc,
Functions/Zle/zcalc-auto-insert: zcalc-auto-insert widget
for key binding in zcalc.
2014-04-06 Barton E. Schaefer <schaefer@brasslantern.com>
* unposted: Doc/Zsh/options.yo: fix typo in option cross-reference

19
Doc/Zsh/contrib.yo
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@ -2473,6 +2473,25 @@ The style tt(whence) is available in the context tt(:zle:$WIDGET); this
may be set to an array to give the command and options that will be used to
investigate the command word found. The default is tt(whence -c).
)
tindex(zcalc-auto-insert)
item(tt(zcalc-auto-insert))(
This function is useful together with the tt(zcalc) function described in
ifzman(the section Mathematical Functions)\
ifnzman(noderef(Mathematical Functions)).
It should be bound to a key representing a binary operator such
as `tt(PLUS())', `tt(-)', `tt(*)' or `tt(/)'. When running in zcalc,
if the key occurs at the start of the line or immediately following
an open parenthesis, the text tt("ans ") is inserted before the
representation of the key itself. This allows easy use of the
answer from the previous calculation in the current line. The
text to be inserted before the symbol typed can be modified by setting
the variable tt(ZCALC_AUTO_INSERT_PREFIX).
Hence, for example, typing `tt(PLUS()12)' followed by return adds 12
to the previous result.
When not in zcalc, the key simply inserts the symbol itself.
)
enditem()
subsect(Utility Functions)

3
Functions/Misc/zcalc
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@ -96,6 +96,9 @@
emulate -L zsh
setopt extendedglob
# For testing in ZLE functions.
local ZCALC_ACTIVE=1
# TODO: make local variables that shouldn't be visible in expressions
# begin with _.
local line ans base defbase forms match mbegin mend psvar optlist opt arg

8
Functions/Zle/zcalc-auto-insert Normal file
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@ -0,0 +1,8 @@
# Bind to a binary operator keystroke for use with zcalc
if [[ -n $ZCALC_ACTIVE ]]; then
if [[ $CURSOR -eq 0 || $LBUFFER[-1] = "(" ]]; then
LBUFFER+=${ZCALC_AUTO_INSERT_PREFIX:-"ans "}
fi
fi
zle .self-insert