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Diffstat (limited to 'Doc/Zsh')
| -rw-r--r-- | Doc/Zsh/contrib.yo | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Doc/Zsh/contrib.yo b/Doc/Zsh/contrib.yo index bb03fa68a..e6a69ecd7 100644 --- a/Doc/Zsh/contrib.yo +++ b/Doc/Zsh/contrib.yo @@ -1142,6 +1142,60 @@ investigate the command word found. The default is tt(whence -c). ) enditem() +subsect(Utility Functions) + +These functions are useful in constructing widgets. They +should be loaded with `tt(autoload -U) var(function)' and called +as indicated from user-defined widgets. + +startitem() +tindex(split-shell-arguments) +item(tt(split-shell-arguments))( +This function splits the line currently being edited into shell arguments +and whitespace. The result is stored in the array tt(reply). The array +contains all the parts of the line in order, starting with any whitespace +before the first argument, and finishing with any whitespace after the last +argument. Hence (so long as the option tt(KSH_ARRAYS) is not set) +whitespace is given by odd indices in the array and arguments by +even indices. Note that no stripping of quotes is done; joining together +all the elements of tt(reply) in order is guaranteed to produce the +original line. + +The parameter tt(REPLY) is set to the index of the word in tt(reply) which +contains the character after the cursor, where the first element has index +1. The parameter tt(REPLY2) is set to the index of the character under the +cursor in that word, where the first character has index 1. + +Hence tt(reply), tt(REPLY) and tt(REPLY2) should all be made local to +the enclosing function. + +See the function tt(modify-current-argument), described below, for +an example of how to call this function. +) +tindex(modify-current-argument) +item(tt(modify-current-argument) var(expr-using-)tt($ARG))( +This function provides a simple method of allowing user-defined widgets +to modify the command line argument under the cursor (or immediately to the +left of the cursor if the cursor is between arguments). The argument +should be an expression which when evaluated operates on the shell +parameter tt(ARG), which will have been set to the command line argument +under the cursor. The expression should be suitably quoted to prevent +it being evaluated too early. + +For example, a user-defined widget containing the following code +converts the characters in the argument under the cursor into all upper +case: + +example(modify-current-word '${(U)ARG}') + +The following strips any quoting from the current word (whether backslashes +or one of the styles of quotes), and replaces it with single quoting +throughout: + +example(modify-current-word '${(qq)${(Q)ARG}}') +) +enditem() + subsect(Styles) The behavior of several of the above widgets can be controlled by the use |