Fix #373 - echo the cursor message after lint cycles or when leaving Insert mode

autoload/ale/engine.vim

@@ -268,6 +268,12 @@ function! ale#engine#SetResults(buffer, loclist) abort
     if g:ale_set_highlights
         call ale#highlight#SetHighlights(a:buffer, a:loclist)
     endif
+
+    if g:ale_echo_cursor
+        " Try and echo the warning now.
+        " This will only do something meaningful if we're in normal mode.
+        call ale#cursor#EchoCursorWarning()
+    endif
 endfunction
 
 function! s:SetExitCode(job, exit_code) abort

plugin/ale.vim

@@ -166,6 +166,10 @@ function! s:ALEInitAuGroups() abort
         autocmd!
         if g:ale_enabled && g:ale_echo_cursor
             autocmd CursorMoved,CursorHold * call ale#cursor#EchoCursorWarningWithDelay()
+            " Look for a warning to echo as soon as we leave Insert mode.
+            " The script's position variable used when moving the cursor will
+            " not be changed here.
+            autocmd InsertLeave * call ale#cursor#EchoCursorWarning()
         endif
     augroup END
 

test/test_cursor_warnings.vader

@@ -36,7 +36,16 @@ Before:
   \ },
   \}
 
+  " Turn off other features, we only care about this one feature in this test.
+  let g:ale_set_loclist = 0
+  let g:ale_set_signs = 0
+  let g:ale_set_highlights = 0
+
 After:
+  let g:ale_set_loclist = 1
+  let g:ale_set_signs = 1
+  let g:ale_set_highlights = 1
+
   unlet! g:output
   unlet! g:lines
   let g:ale_buffer_info = {}
@@ -84,3 +93,33 @@ Then(Check the cursor output):
   let g:lines = split(g:output, "\n")
 
   AssertEqual 'Missing radix parameter (radix)', g:lines[-1]
+
+Execute(Set results for a lint cycle, with the cursor on line 1):
+  :1
+  call ale#engine#SetResults(
+  \ bufnr('%'),
+  \ g:ale_buffer_info[bufnr('%')].loclist,
+  \)
+
+Then(Check the cursor output):
+  redir => g:output
+    :mess
+  redir END
+
+  let g:lines = split(g:output, "\n")
+
+  AssertEqual 'Missing semicolon. (semi)', g:lines[-1]
+
+Execute(Simulate leaving insert mode on line 2):
+  :2
+  normal 16h
+  doautocmd InsertLeave
+
+Then(Check the cursor output):
+  redir => g:output
+    :mess
+  redir END
+
+  let g:lines = split(g:output, "\n")
+
+  AssertEqual 'Infix operators must be spaced. (space-infix-ops)', g:lines[-1]