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Extend statusline interface (#2240)

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* Extended statusline.vim to provide an efficient way to access the first errors,warnings,stylerrors,stylewarnings,etc from the loclist.
* Added documentation and help for the new API function.
This commit is contained in:
petpetpetpet 2019-01-27 12:44:49 +00:00 committed by w0rp
parent a7b3b84899
commit 3c38fdb1bb
4 changed files with 171 additions and 27 deletions
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15
README.md
View File

@ -578,8 +578,16 @@ let g:airline#extensions#ale#enabled = 1
```
If you don't want to use vim-airline, you can implement your own statusline
function without adding any other plugins. ALE provides a function for counting
the number of problems for this purpose, named `ale#statusline#Count`.
function without adding any other plugins. ALE provides some functions to
assist in this endeavour, including:
* `ale#statusline#Count`: Which returns the number of problems found by ALE
for a specified buffer.
* `ale#statusline#FirstProblem`: Which returns a dictionary containing the
full loclist details of the first problem of a specified type found by ALE
in a buffer. (e.g. The first style warning in the current buffer.)
This can be useful for displaying more detailed information such as the
line number of the first problem in a file.
Say you want to display all errors as one figure, and all non-errors as another
figure. You can do the following:
@ -601,7 +609,8 @@ endfunction
set statusline=%{LinterStatus()}
```
See `:help ale#statusline#Count()` for more information.
See `:help ale#statusline#Count()` or `:help ale#statusline#FirstProblem()`
for more information.
<a name="faq-lightline"></a>

73
autoload/ale/statusline.vim
View File

@ -1,4 +1,5 @@
" Author: KabbAmine <amine.kabb@gmail.com>
" Additions by: petpetpetpet <chris@freelanceninjas.com>
" Description: Statusline related function(s)
function! s:CreateCountDict() abort
@ -26,19 +27,42 @@ function! ale#statusline#Update(buffer, loclist) abort
let l:count = s:CreateCountDict()
let l:count.total = len(l:loclist)
" Allows easy access to the first instance of each problem type.
let l:first_problems = {}
for l:entry in l:loclist
if l:entry.type is# 'W'
if get(l:entry, 'sub_type', '') is# 'style'
let l:count.style_warning += 1
if l:count.style_warning == 1
let l:first_problems.style_warning = l:entry
endif
else
let l:count.warning += 1
if l:count.warning == 1
let l:first_problems.warning = l:entry
endif
endif
elseif l:entry.type is# 'I'
let l:count.info += 1
if l:count.info == 1
let l:first_problems.info = l:entry
endif
elseif get(l:entry, 'sub_type', '') is# 'style'
let l:count.style_error += 1
if l:count.style_error == 1
let l:first_problems.style_error = l:entry
endif
else
let l:count.error += 1
if l:count.error == 1
let l:first_problems.error = l:entry
endif
endif
endfor
@ -47,24 +71,63 @@ function! ale#statusline#Update(buffer, loclist) abort
let l:count[1] = l:count.total - l:count[0]
let g:ale_buffer_info[a:buffer].count = l:count
let g:ale_buffer_info[a:buffer].first_problems = l:first_problems
endfunction
" Get the counts for the buffer, and update the counts if needed.
function! s:UpdateCacheIfNecessary(buffer) abort
" Cache is cold, so manually ask for an update.
if !has_key(g:ale_buffer_info[a:buffer], 'count')
call ale#statusline#Update(a:buffer,
\ g:ale_buffer_info[a:buffer].loclist)
endif
endfunction
function! s:BufferCacheExists(buffer) abort
if !exists('g:ale_buffer_info') || !has_key(g:ale_buffer_info, a:buffer)
return 0
endif
return 1
endfunction
" Get the counts for the buffer, and update the counts if needed.
function! s:GetCounts(buffer) abort
if !exists('g:ale_buffer_info') || !has_key(g:ale_buffer_info, a:buffer)
if !s:BufferCacheExists(a:buffer)
return s:CreateCountDict()
endif
" Cache is cold, so manually ask for an update.
if !has_key(g:ale_buffer_info[a:buffer], 'count')
call ale#statusline#Update(a:buffer, g:ale_buffer_info[a:buffer].loclist)
endif
call s:UpdateCacheIfNecessary(a:buffer)
return g:ale_buffer_info[a:buffer].count
endfunction
" Get the dict of first_problems, update the buffer info cache if necessary.
function! s:GetFirstProblems(buffer) abort
if !s:BufferCacheExists(a:buffer)
return {}
endif
call s:UpdateCacheIfNecessary(a:buffer)
return g:ale_buffer_info[a:buffer].first_problems
endfunction
" Returns a Dictionary with counts for use in third party integrations.
function! ale#statusline#Count(buffer) abort
" The Dictionary is copied here before exposing it to other plugins.
return copy(s:GetCounts(a:buffer))
endfunction
" Returns a copy of the *first* locline instance of the specified problem
" type. (so this would allow an external integration to know all the info
" about the first style warning in the file, for example.)
function! ale#statusline#FirstProblem(buffer, type) abort
let l:first_problems = s:GetFirstProblems(a:buffer)
if !empty(l:first_problems) && has_key(l:first_problems, a:type)
return copy(l:first_problems[a:type])
endif
return {}
endfunction

15
doc/ale.txt
View File

@ -3159,6 +3159,21 @@ ale#statusline#Count(buffer) *ale#statusline#Count()*
`total` -> The total number of problems.
ale#statusline#FirstProblem(buffer, type) *ale#statusline#FirstProblem()*
Returns a copy of the first entry in the `loclist` that matches the supplied
buffer number and problem type. If there is no such enty, an empty dictionary
is returned.
Problem type should be one of the strings listed below:
`error` -> Returns the first `loclist` item with type `E` and
`sub_type != 'style'`
`warning` -> First item with type `W` and `sub_type != 'style'`
`info` -> First item with type `I`
`style_error` -> First item with type `E` and `sub_type == 'style'`
`style_warning` -> First item with type `W` and `sub_type == 'style'`
b:ale_linted *b:ale_linted*
`b:ale_linted` is set to the number of times a buffer has been checked by

95
test/test_statusline.vader
View File

@ -28,25 +28,9 @@ Before:
return l:res
endfunction
After:
Restore
delfunction Counts
Execute (Count should be 0 when data is empty):
AssertEqual Counts({}), ale#statusline#Count(bufnr(''))
Execute (Count should read data from the cache):
let g:ale_buffer_info = {'44': {'count': Counts({'error': 1, 'warning': 2})}}
AssertEqual Counts({'error': 1, 'warning': 2}), ale#statusline#Count(44)
Execute (The count should be correct after an update):
let g:ale_buffer_info = {'44': {}}
call ale#statusline#Update(44, [])
AssertEqual Counts({}), ale#statusline#Count(44)
Execute (Count should be match the loclist):
let g:ale_buffer_info = {
" A test simplified loclist that will be used for some of the
" tests in this module.
let g:test_buffer_info = {
\ bufnr(''): {
\ 'loclist': [
\ {'bufnr': bufnr('') - 1, 'type': 'E'},
@ -77,6 +61,61 @@ Execute (Count should be match the loclist):
\ ],
\ },
\}
After:
Restore
delfunction Counts
unlet g:test_buffer_info
Execute (Count should be 0 when data is empty):
AssertEqual Counts({}), ale#statusline#Count(bufnr(''))
Execute (FirstProblem should be 0 when data is empty):
AssertEqual {}, ale#statusline#FirstProblem(bufnr(''), 'error')
AssertEqual {}, ale#statusline#FirstProblem(bufnr(''), 'warning')
AssertEqual {}, ale#statusline#FirstProblem(bufnr(''), 'style_error')
AssertEqual {}, ale#statusline#FirstProblem(bufnr(''), 'style_warning')
AssertEqual {}, ale#statusline#FirstProblem(bufnr(''), 'info')
Execute (Count should read data from the cache):
let g:ale_buffer_info = {'44': {'count': Counts({'error': 1, 'warning': 2})}}
AssertEqual Counts({'error': 1, 'warning': 2}), ale#statusline#Count(44)
Execute (FirstProblem should read data from the cache):
let g:ale_buffer_info =
\{"44":
\{'count': 0,
\'first_problems':
\{'error': {'lnum': 3},
\'warning': {'lnum': 44},
\'style_error': {'lnum': 22},
\'style_warning': {'lnum': 223},
\'info': {'lnum': 2}
\}
\}
\}
AssertEqual {'lnum': 3}, ale#statusline#FirstProblem(44, 'error')
AssertEqual {'lnum': 44}, ale#statusline#FirstProblem(44, 'warning')
AssertEqual {'lnum': 223}, ale#statusline#FirstProblem(44, 'style_warning')
AssertEqual {'lnum': 22}, ale#statusline#FirstProblem(44, 'style_error')
AssertEqual {'lnum': 2}, ale#statusline#FirstProblem(44, 'info')
Execute (The count should be correct after an update):
let g:ale_buffer_info = {'44': {}}
call ale#statusline#Update(44, [])
AssertEqual Counts({}), ale#statusline#Count(44)
Execute (FirstProblem should be correct after an update):
let g:ale_buffer_info = {'44': {}}
call ale#statusline#Update(44, [])
AssertEqual {}, ale#statusline#FirstProblem(bufnr(''), 'error')
AssertEqual {}, ale#statusline#FirstProblem(bufnr(''), 'warning')
AssertEqual {}, ale#statusline#FirstProblem(bufnr(''), 'style_error')
AssertEqual {}, ale#statusline#FirstProblem(bufnr(''), 'style_warning')
AssertEqual {}, ale#statusline#FirstProblem(bufnr(''), 'info')
Execute (Count should match the loclist):
let g:ale_buffer_info = g:test_buffer_info
AssertEqual {
\ 'error': 1,
\ 'style_error': 2,
@ -88,8 +127,22 @@ Execute (Count should be match the loclist):
\ 'total': 15,
\}, ale#statusline#Count(bufnr(''))
Execute (FirstProblem should pull the first matching value from the loclist):
let g:ale_buffer_info = g:test_buffer_info
AssertEqual {'bufnr': bufnr(''), 'type': 'E'}, ale#statusline#FirstProblem(bufnr(''), 'error')
AssertEqual {'bufnr': bufnr(''), 'type': 'W'}, ale#statusline#FirstProblem(bufnr(''), 'warning')
AssertEqual {'bufnr': bufnr(''), 'type': 'E', 'sub_type': 'style'}, ale#statusline#FirstProblem(bufnr(''), 'style_error')
AssertEqual {'bufnr': bufnr(''), 'type': 'W', 'sub_type': 'style'}, ale#statusline#FirstProblem(bufnr(''), 'style_warning')
AssertEqual {'bufnr': bufnr(''), 'type': 'I'}, ale#statusline#FirstProblem(bufnr(''), 'info')
Execute (Output should be empty for non-existent buffer):
let g:ale_buffer_info = g:test_buffer_info
AssertEqual Counts({}), ale#statusline#Count(9001)
AssertEqual {}, ale#statusline#FirstProblem(9001, 'error')
AssertEqual {}, ale#statusline#FirstProblem(9001, 'warning')
AssertEqual {}, ale#statusline#FirstProblem(9001, 'style_error')
AssertEqual {}, ale#statusline#FirstProblem(9001, 'style_warning')
AssertEqual {}, ale#statusline#FirstProblem(9001, 'info')
Execute(ale#statusline#Update shouldn't blow up when globals are undefined):
unlet! g:ale_statusline_format
@ -98,3 +151,7 @@ Execute(ale#statusline#Update shouldn't blow up when globals are undefined):
Execute(ale#statusline#Count should return 0 counts when globals are undefined):
unlet! g:ale_statusline_format
AssertEqual Counts({}), ale#statusline#Count(1)
Execute(FirstProblem should return an empty dict when globals are undefined):
unlet! g:ale_statusline_format
AssertEqual {}, ale#statusline#FirstProblem(bufnr(''), 'info')