#149 - Set different highlights for info, style error, and style warning problems

autoload/ale/highlight.vim

@@ -6,10 +6,22 @@ if !hlexists('ALEError')
     highlight link ALEError SpellBad
 endif
 
+if !hlexists('ALEStyleError')
+    highlight link ALEStyleError ALEError
+endif
+
 if !hlexists('ALEWarning')
     highlight link ALEWarning SpellCap
 endif
 
+if !hlexists('ALEStyleWarning')
+    highlight link ALEStyleWarning ALEWarning
+endif
+
+if !hlexists('ALEInfo')
+    highlight link ALEInfo ALEWarning
+endif
+
 " This map holds highlights to be set when buffers are opened.
 " We can only set highlights for whatever the current buffer is, so we will
 " wait until the buffer is entered again to show the highlights, unless
@@ -84,7 +96,21 @@ function! ale#highlight#UpdateHighlights() abort
     if g:ale_enabled
         for l:item in l:loclist
             let l:col = l:item.col
-            let l:group = l:item.type ==# 'E' ? 'ALEError' : 'ALEWarning'
+
+            if l:item.type ==# 'W'
+                if get(l:item, 'sub_type', '') ==# 'style'
+                    let l:group = 'ALEStyleWarning'
+                else
+                    let l:group = 'ALEWarning'
+                endif
+            elseif l:item.type ==# 'I'
+                let l:group = 'ALEInfo'
+            elseif get(l:item, 'sub_type', '') ==# 'style'
+                let l:group = 'ALEStyleError'
+            else
+                let l:group = 'ALEError'
+            endif
+
             let l:line = l:item.lnum
             let l:size = has_key(l:item, 'end_col') ? l:item.end_col - l:col + 1 : 1
 

doc/ale.txt

@@ -507,10 +507,15 @@ g:ale_set_highlights                                     *g:ale_set_highlights*
   Type: |Number|
   Default: `has('syntax')`
 
-  When this option is set to `1`, highlights will be set in for erros and
+  When this option is set to `1`, highlights will be set for problems.
-  warnings. The `ALEError` and `ALEWarning` highlight groups will be used to
+
-  provide highlights, and default to linking to `SpellBad` and `SpellCap`
+  ALE will use the following highlight groups for problems:
-  respectively by default.
+
+  `ALEError`        - Items with `'type': 'E'`
+  `ALEWarning`      - Items with `'type': 'W'`
+  `ALEInfo`         - Items with `'type': 'I'`
+  `ALEStyleError`   - Items with `'type': 'E'` and `'sub_type': 'style'`
+  `ALEStyleWarning` - Items with `'type': 'W'` and `'sub_type': 'style'`
 
 
 g:ale_set_loclist                                           *g:ale_set_loclist*

test/test_highlight_placement.vader

@@ -150,3 +150,26 @@ Execute(Higlight end columns should set an appropriate size):
   \   {'group': 'ALEWarning', 'id': 16, 'priority': 10, 'pos1': [4, 1, 5]},
   \ ],
   \ getmatches()
+
+Execute(Higlight end columns should set an appropriate size):
+  call ale#highlight#SetHighlights(bufnr('%'), [
+  \ {'bufnr': bufnr('%'), 'type': 'E', 'lnum': 1, 'col': 1},
+  \ {'bufnr': bufnr('%'), 'type': 'E', 'lnum': 2, 'col': 1},
+  \ {'bufnr': bufnr('%'), 'type': 'E', 'sub_type': 'style', 'lnum': 3, 'col': 1},
+  \ {'bufnr': bufnr('%'), 'type': 'W', 'lnum': 4, 'col': 1},
+  \ {'bufnr': bufnr('%'), 'type': 'W', 'lnum': 5, 'col': 1},
+  \ {'bufnr': bufnr('%'), 'type': 'W', 'sub_type': 'style', 'lnum': 6, 'col': 1},
+  \ {'bufnr': bufnr('%'), 'type': 'I', 'lnum': 7, 'col': 1},
+  \])
+
+  AssertEqual
+  \ [
+  \   {'group': 'ALEError', 'id': 17, 'priority': 10, 'pos1': [1, 1, 1]},
+  \   {'group': 'ALEError', 'id': 18, 'priority': 10, 'pos1': [2, 1, 1]},
+  \   {'group': 'ALEStyleError', 'id': 19, 'priority': 10, 'pos1': [3, 1, 1]},
+  \   {'group': 'ALEWarning', 'id': 20, 'priority': 10, 'pos1': [4, 1, 1]},
+  \   {'group': 'ALEWarning', 'id': 21, 'priority': 10, 'pos1': [5, 1, 1]},
+  \   {'group': 'ALEStyleWarning', 'id': 22, 'priority': 10, 'pos1': [6, 1, 1]},
+  \   {'group': 'ALEInfo', 'id': 23, 'priority': 10, 'pos1': [7, 1, 1]},
+  \ ],
+  \ getmatches()