#653 - Filter items based on the buffer number for signs

autoload/ale/sign.vim

@@ -104,11 +104,15 @@ function! ale#sign#FindCurrentSigns(buffer) abort
 endfunction
 
 " Given a loclist, group the List into with one List per line.
-function! s:GroupLoclistItems(loclist) abort
+function! s:GroupLoclistItems(buffer, loclist) abort
     let l:grouped_items = []
     let l:last_lnum = -1
 
     for l:obj in a:loclist
+        if l:obj.bufnr != a:buffer
+            continue
+        endif
+
         " Create a new sub-List when we hit a new line.
         if l:obj.lnum != l:last_lnum
             call add(l:grouped_items, [])
@@ -231,11 +235,11 @@ function! s:PlaceNewSigns(buffer, grouped_items, current_sign_offset) abort
 endfunction
 
 " Get items grouped by any current sign IDs they might have.
-function! s:GetItemsWithSignIDs(loclist) abort
+function! s:GetItemsWithSignIDs(buffer, loclist) abort
     let l:items_by_sign_id = {}
 
     for l:item in a:loclist
-        if has_key(l:item, 'sign_id')
+        if l:item.bufnr == a:buffer && has_key(l:item, 'sign_id')
             if !has_key(l:items_by_sign_id, l:item.sign_id)
                 let l:items_by_sign_id[l:item.sign_id] = []
             endif
@@ -273,14 +277,14 @@ function! ale#sign#SetSigns(buffer, loclist) abort
     " Find the current markers
     let l:current_sign_list = ale#sign#FindCurrentSigns(a:buffer)
     " Get a mapping from sign IDs to current loclist items which have them.
-    let l:items_by_sign_id = s:GetItemsWithSignIDs(a:loclist)
+    let l:items_by_sign_id = s:GetItemsWithSignIDs(a:buffer, a:loclist)
 
     " Use sign information to update the line numbers for the loclist items.
     call s:UpdateLineNumbers(l:current_sign_list, l:items_by_sign_id)
     " Sort items again, as the line numbers could have changed.
     call sort(a:loclist, 'ale#util#LocItemCompare')
 
-    let l:grouped_items = s:GroupLoclistItems(a:loclist)
+    let l:grouped_items = s:GroupLoclistItems(a:buffer, a:loclist)
 
     " Set the dummy sign if we need to.
     " This keeps the sign gutter open while we remove things, etc.