Mercurial > vim
diff runtime/doc/eval.txt @ 16648:a7f06505ad39 v8.1.1326
patch 8.1.1326: no test for listener with partial
commit https://github.com/vim/vim/commit/8aad88d8de256e58f04054eb7230c9613e26502f
Author: Bram Moolenaar <Bram@vim.org>
Date: Sun May 12 13:53:50 2019 +0200
patch 8.1.1326: no test for listener with partial
Problem: No test for listener with partial.
Solution: Add a test. Add example to help.
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Sun, 12 May 2019 14:00:07 +0200 |
| parents | 4790302965fc |
| children | 04c2614af21c |
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line diff
--- a/runtime/doc/eval.txt +++ b/runtime/doc/eval.txt @@ -6323,7 +6323,8 @@ listener_add({callback} [, {buf}]) *li Returns a unique ID that can be passed to |listener_remove()|. The {callback} is invoked with a list of items that indicate a - change. Each list item is a dictionary with these entries: + change. The list cannot be changed. Each list item is a + dictionary with these entries: lnum the first line number of the change end the first line below the change added number of lines added; negative if lines were @@ -6349,7 +6350,21 @@ listener_add({callback} [, {buf}]) *li added zero col first column with a change or one - The {callback} is invoked just before the screen is updated. + The entries are in the order the changes was made, thus the + most recent change is at the end. One has to go through the + list from end to start to compute the line numbers in the + current state of the text. + + When using the same function for multiple buffers, you can + pass the buffer to that function using a |Partial|. + Example: > + func Listener(bufnr, changes) + " ... + endfunc + let bufnr = ... + call listener_add(function('Listener', [bufnr]), bufnr) + +< The {callback} is invoked just before the screen is updated. To trigger this in a script use the `:redraw` command. The {callback} is not invoked when the buffer is first loaded. @@ -10984,10 +10999,10 @@ expressions |expr-lambda|. Example: > function Something(key, value = 10) - echo a:key .. ": " .. value + echo a:key .. ": " .. a:value endfunction call Something('empty') "empty: 10" - call Something('key, 20) "key: 20" + call Something('key', 20) "key: 20" The argument default expressions are evaluated at the time of the function call, not definition. Thus it is possible to use an expression which is