[WIP] Introduce floatwin/popupwin compatible layer

autoload/lsp/ui/vim.vim

@@ -1,3 +1,7 @@
+let s:Floatwin = lsp#ui#vim#floatwin#import()
+let s:floatwin = s:Floatwin.new({
+            \   'close_on': ['InsertEnter', 'CursorMoved']
+            \ })
 let s:last_req_id = 0
 
 function! s:not_supported(what) abort
@@ -505,17 +509,16 @@ function! s:handle_location(ctx, server, type, data) abort "ctx = {counter, list
             else
                 let l:lines = readfile(fnameescape(l:loc['filename']))
                 if has_key(l:loc,'viewstart') " showing a locationLink
-                    let l:view = l:lines[l:loc['viewstart'] : l:loc['viewend']]
-                    call lsp#ui#vim#output#preview(a:server, l:view, {
-                                \   'statusline': ' LSP Peek ' . a:type,
-                                \   'filetype': &filetype
-                                \ })
-                else " showing a location
-                    call lsp#ui#vim#output#preview(a:server, l:lines, {
-                                \   'statusline': ' LSP Peek ' . a:type,
-                                \   'cursor': { 'line': l:loc['lnum'], 'col': l:loc['col'], 'align': g:lsp_peek_alignment },
-                                \   'filetype': &filetype
-                                \ })
+                    let l:lines = l:lines[l:loc['viewstart'] : l:loc['viewend']]
+                endif
+                let l:screenpos = lsp#ui#vim#floatwin#screenpos(line('.'), col('.'))
+                if s:floatwin.is_showing()
+                    call s:floatwin.enter()
+                else
+                    call s:floatwin.show(l:screenpos, lsp#utils#normalize_markup_content({
+                                \   'language': &filetype,
+                                \   'value': join(l:lines, "\n")
+                                \ }))
                 endif
             endif
         endif

autoload/lsp/ui/vim/floatwin.vim

@@ -0,0 +1,189 @@
+let s:floatwin_id = 0
+
+let s:namespace = has('nvim') ? 'nvim' : 'vim'
+
+"
+" lsp#ui#vim#floatwin#screenpos
+"
+function! lsp#ui#vim#floatwin#screenpos(line, col) abort
+  let l:pos = getpos('.')
+  let l:scroll_x = (l:pos[2] + l:pos[3]) - wincol()
+  let l:scroll_y = l:pos[1] - winline()
+  let l:winpos = win_screenpos(win_getid())
+  return [l:winpos[0] + (a:line - l:scroll_y) - 1, l:winpos[1] + (a:col - l:scroll_x) - 1]
+endfunction
+
+"
+" lsp#ui#vim#floatwin#import
+"
+function! lsp#ui#vim#floatwin#import() abort
+  return s:Floatwin
+endfunction
+
+let s:Floatwin = {}
+
+"
+" new
+"
+function! s:Floatwin.new(option) abort
+  let s:floatwin_id += 1
+  let l:bufname = printf('lsp_floatwin-%s.lsp_floatwin', s:floatwin_id)
+  let l:bufnr = bufnr(l:bufname, v:true)
+  call setbufvar(l:bufnr, '&buflisted', 0)
+  call setbufvar(l:bufnr, '&buftype', 'nofile')
+  call setbufvar(l:bufnr, '&filetype', 'lsp_floatwin')
+  return extend(deepcopy(s:Floatwin), {
+        \   'id': s:floatwin_id,
+        \   'bufnr': l:bufnr,
+        \   'max_width': get(a:option, 'max_width', g:lsp_preview_max_width),
+        \   'max_height': get(a:option, 'max_height', g:lsp_preview_max_height),
+        \   'close_on': get(a:option, 'close_on', []),
+        \   'screenpos': [0, 0],
+        \   'contents': []
+        \ })
+endfunction
+
+"
+" show_tooltip
+"
+function! s:Floatwin.show_tooltip(screenpos, contents) abort
+  let l:width = self.get_width(a:contents)
+  let l:height = self.get_height(a:contents)
+
+  let l:screenpos = copy(a:screenpos)
+  let l:screenpos[0] -= 1
+  let l:screenpos[1] -= 1
+
+  " fix height.
+  if l:screenpos[0] - l:height >= 0
+    let l:screenpos[0] -= l:height
+  else
+    let l:screenpos[0] += 1
+  endif
+
+  " fix width.
+  if &columns < l:screenpos[1] + l:width
+    let l:screenpos[1] -= l:screenpos[1] + l:width - &columns
+  endif
+
+  call self.show(l:screenpos,  a:contents)
+endfunction
+
+"
+" show
+"
+function! s:Floatwin.show(screenpos, contents) abort
+  let self.screenpos = a:screenpos
+  let self.contents = a:contents
+
+  " create lines.
+  let l:lines = []
+  for l:content in a:contents
+    let l:lines += l:content
+  endfor
+
+  " update bufvars.
+  call setbufvar(self.bufnr, 'lsp_floatwin_lines', l:lines)
+
+  " show or move
+  call lsp#ui#vim#floatwin#{s:namespace}#show(self)
+  call setwinvar(self.winid(), '&wrap', 1)
+  if g:lsp_hover_conceal
+    call setwinvar(self.winid(), '&conceallevel', 3)
+  endif
+
+  " write lines
+  call lsp#ui#vim#floatwin#{s:namespace}#write(self, l:lines)
+
+  " update syntax highlight.
+  if has('nvim') && LspFloatwinSyntaxShouldUpdate(self.bufnr)
+    call lsp#utils#windo(self.winid(), { -> LspFloatwinSyntaxUpdate() })
+  endif
+
+  call self.set_close_events()
+endfunction
+
+"
+" hide
+"
+function! s:Floatwin.hide() abort
+  augroup printf('lsp#ui#vim#floatwin#hide_%s', self.id)
+    autocmd!
+  augroup END
+  call lsp#ui#vim#floatwin#{s:namespace}#hide(self)
+endfunction
+
+"
+" enter
+"
+function! s:Floatwin.enter() abort
+  if g:lsp_preview_doubletap
+    call lsp#ui#vim#floatwin#{s:namespace}#enter(self)
+  endif
+endfunction
+
+"
+" is_showing
+"
+function! s:Floatwin.is_showing() abort
+  return lsp#ui#vim#floatwin#{s:namespace}#is_showing(self)
+endfunction
+
+"
+" winid
+"
+function! s:Floatwin.winid() abort
+  return lsp#ui#vim#floatwin#{s:namespace}#winid(self)
+endfunction
+
+"
+" set_close_events
+"
+function! s:Floatwin.set_close_events() abort
+  let l:close_fn = printf('lsp_floatwin_close_%s', self.id)
+  let b:[l:close_fn] = { -> self.hide() }
+
+  if g:lsp_preview_autoclose
+    augroup printf('lsp#ui#vim#floatwin#hide_%s', self.id)
+      autocmd!
+      for l:event in self.close_on
+        execute printf('autocmd %s <buffer> call b:%s()', l:event, l:close_fn)
+      endfor
+    augroup END
+  endif
+endfunction
+
+"
+" get_width
+"
+function! s:Floatwin.get_width(contents) abort
+  let l:width = 0
+  for l:content in a:contents
+    let l:width = max([l:width] + map(copy(l:content), { k, v -> strdisplaywidth(v) }))
+  endfor
+
+  if self.max_width != -1
+    return max([min([self.max_width, l:width]), 1])
+  endif
+  return max([l:width, 1])
+endfunction
+
+"
+" get_height
+"
+function! s:Floatwin.get_height(contents) abort
+  let l:width = self.get_width(a:contents)
+
+  let l:height = len(a:contents) - 1
+  for l:content in a:contents
+    for l:line in l:content
+      let l:height += max([1, float2nr(ceil(strdisplaywidth(l:line) / str2float('' . l:width)))])
+    endfor
+  endfor
+
+  if self.max_height != -1
+    return max([min([self.max_height, l:height]), 1])
+  endif
+  return max([l:height, 1])
+endfunction
+

autoload/lsp/ui/vim/floatwin/nvim.vim

@@ -0,0 +1,78 @@
+"
+" lsp#ui#vim#floatwin#nvim#show
+"
+function! lsp#ui#vim#floatwin#nvim#show(floatwin) abort
+  if lsp#ui#vim#floatwin#nvim#is_showing(a:floatwin)
+    call nvim_win_set_config(a:floatwin.nvim_window, s:get_config(a:floatwin))
+  else
+    let a:floatwin.nvim_window = nvim_open_win(a:floatwin.bufnr, v:false, s:get_config(a:floatwin))
+  endif
+endfunction
+
+"
+" lsp#ui#vim#floatwin#nvim#hide
+"
+function! lsp#ui#vim#floatwin#nvim#hide(floatwin) abort
+  if lsp#ui#vim#floatwin#nvim#is_showing(a:floatwin)
+    call nvim_win_close(a:floatwin.nvim_window, v:true)
+    let a:floatwin.nvim_window = v:null
+  endif
+endfunction
+
+"
+" lsp#ui#vim#floatwin#nvim#write
+"
+function! lsp#ui#vim#floatwin#nvim#write(floatwin, lines) abort
+  call nvim_buf_set_lines(a:floatwin.bufnr, 0, -1, v:true, a:lines)
+endfunction
+
+"
+" lsp#ui#vim#floatwin#nvim#enter
+"
+function! lsp#ui#vim#floatwin#nvim#enter(floatwin) abort
+  if lsp#ui#vim#floatwin#nvim#is_showing(a:floatwin)
+    execute printf('%swincmd w', win_id2win(lsp#ui#vim#floatwin#nvim#winid(a:floatwin)))
+  endif
+endfunction
+
+"
+" lsp#ui#vim#floatwin#nvim#is_showing
+"
+function! lsp#ui#vim#floatwin#nvim#is_showing(floatwin) abort
+  if !has_key(a:floatwin,'nvim_window') || a:floatwin.nvim_window is v:null
+    return v:false
+  endif
+
+  try
+    return nvim_win_get_number(a:floatwin.nvim_window) != -1
+  catch /.*/
+    let a:floatwin.nvim_window = v:null
+  endtry
+  return v:false
+endfunction
+
+"
+" lsp#ui#vim#floatwin#nvim#winid
+"
+function! lsp#ui#vim#floatwin#nvim#winid(floatwin) abort
+  if lsp#ui#vim#floatwin#nvim#is_showing(a:floatwin)
+    return win_getid(nvim_win_get_number(a:floatwin.nvim_window))
+  endif
+  return -1
+endfunction
+
+"
+" s:get_config
+"
+function! s:get_config(floatwin) abort
+  return {
+        \   'relative': 'editor',
+        \   'width': a:floatwin.get_width(a:floatwin.contents),
+        \   'height': a:floatwin.get_height(a:floatwin.contents),
+        \   'row': a:floatwin.screenpos[0],
+        \   'col': a:floatwin.screenpos[1],
+        \   'focusable': v:true,
+        \   'style': 'minimal'
+        \ }
+endfunction
+

autoload/lsp/ui/vim/floatwin/vim.vim

@@ -0,0 +1,83 @@
+"
+" lsp#ui#vim#floatwin#vim#show
+"
+function! lsp#ui#vim#floatwin#vim#show(floatwin) abort
+  if lsp#ui#vim#floatwin#vim#is_showing(a:floatwin)
+    call popup_move(a:floatwin.vim_winid, s:get_config(a:floatwin))
+  else
+    let a:floatwin.vim_winid = popup_create(a:floatwin.bufnr, s:get_config(a:floatwin))
+  endif
+endfunction
+
+"
+" lsp#ui#vim#floatwin#vim#hide
+"
+function! lsp#ui#vim#floatwin#vim#hide(floatwin) abort
+  try
+    call popup_hide(a:floatwin.vim_winid)
+  catch /.*/
+  endtry
+  let a:floatwin.vim_winid = v:null
+endfunction
+
+"
+" lsp#ui#vim#floatwin#vim#write
+"
+function! lsp#ui#vim#floatwin#vim#write(floatwin, lines) abort
+  call deletebufline(a:floatwin.bufnr, '^', '$')
+  for l:line in reverse(a:lines)
+    call appendbufline(a:floatwin.bufnr, 0, l:line)
+  endfor
+  call deletebufline(a:floatwin.bufnr, '$')
+endfunction
+
+"
+" lsp#ui#vim#floatwin#vim#enter
+"
+function! lsp#ui#vim#floatwin#vim#enter(floatwin) abort
+  " noop
+endfunction
+
+"
+" lsp#ui#vim#floatwin#vim#is_showing
+"
+function! lsp#ui#vim#floatwin#vim#is_showing(floatwin) abort
+  if !has_key(a:floatwin, 'vim_winid') || a:floatwin.vim_winid is v:null
+    return v:false
+  endif
+
+  if win_id2win(a:floatwin.vim_winid) == -1
+    let a:floatwin.vim_winid = v:null
+    return v:false
+  endif
+  return v:true
+endfunction
+
+"
+" lsp#ui#vim#floatwin#vim#winid
+"
+function! lsp#ui#vim#floatwin#vim#winid(floatwin) abort
+  if lsp#ui#vim#floatwin#vim#is_showing(a:floatwin)
+    return a:floatwin.vim_winid
+  endif
+  return -1
+endfunction
+
+"
+" s:get_config
+"
+function! s:get_config(floatwin) abort
+  return {
+        \   'line': a:floatwin.screenpos[0] + 1,
+        \   'col':  a:floatwin.screenpos[1] + 1,
+        \   'pos': 'topleft',
+        \   'moved': [0, 100000],
+        \   'scrollbar': 0,
+        \   'maxwidth': a:floatwin.get_width(a:floatwin.contents),
+        \   'maxheight': a:floatwin.get_height(a:floatwin.contents),
+        \   'minwidth': a:floatwin.get_width(a:floatwin.contents),
+        \   'minheight': a:floatwin.get_height(a:floatwin.contents),
+        \   'tabpage': 0
+        \ }
+endfunction
+