feat: Make floating window configuration customizable (#310)

* feat(ui): make floating window border configurable

* docs: document setting in readme

* feat: make the entire configuration customizable

README.md

@@ -93,6 +93,7 @@ Trouble comes with the following defaults:
     },
     multiline = true, -- render multi-line messages
     indent_lines = true, -- add an indent guide below the fold icons
+    win_config = { border = "single" }, -- window configuration for floating windows. See |nvim_open_win()|.
     auto_open = false, -- automatically open the list when you have diagnostics
     auto_close = false, -- automatically close the list when you have no diagnostics
     auto_preview = true, -- automatically preview the location of the diagnostic. <esc> to close preview and go back to last window

lua/trouble/config.lua

@@ -46,12 +46,13 @@ local defaults = {
   },
   multiline = true, -- render multi-line messages
   indent_lines = true, -- add an indent guide below the fold icons
+  win_config = { border = "single" }, -- window configuration for floating windows. See |nvim_open_win()|.
   auto_open = false, -- automatically open the list when you have diagnostics
   auto_close = false, -- automatically close the list when you have no diagnostics
   auto_preview = true, -- automatically preview the location of the diagnostic. <esc> to close preview and go back to last window
   auto_fold = false, -- automatically fold a file trouble list at creation
   auto_jump = { "lsp_definitions" }, -- for the given modes, automatically jump if there is only a single result
-  include_declaration = { "lsp_references", "lsp_implementations", "lsp_definitions"  }, -- for the given modes, include the declaration of the current symbol in the results
+  include_declaration = { "lsp_references", "lsp_implementations", "lsp_definitions" }, -- for the given modes, include the declaration of the current symbol in the results
   signs = {
     -- icons / text used for a diagnostic
     error = "",

lua/trouble/init.lua

@@ -61,7 +61,7 @@ function Trouble.open(...)
     config.options.mode = opts.mode
   end
 
-  if opts.severity and (opts.severity ~=config.options.severity) then
+  if opts.severity and (opts.severity ~= config.options.severity) then
     config.options.severity = opts.severity
   end
 
@@ -110,7 +110,7 @@ function Trouble.help()
     height = height + 1
   end
   -- help
-  vim.lsp.util.open_floating_preview(lines, "markdown", { border = "single" })
+  vim.lsp.util.open_floating_preview(lines, "markdown", config.options.win_config)
 end
 
 local updater = util.debounce(100, function()
@@ -169,7 +169,7 @@ function Trouble.action(action)
     action = "refresh"
   end
 
-  if action == 'switch_severity' then
+  if action == "switch_severity" then
     if config.options.severity == nil then
       config.options.severity = vim.diagnostic.severity.ERROR
     elseif config.options.severity < 4 then

lua/trouble/view.lua

@@ -460,7 +460,7 @@ function View:hover(opts)
   if not (item and item.full_text) then
     return
   end
-  vim.lsp.util.open_floating_preview(vim.split(item.full_text, "\n"), "markdown", { border = "single" })
+  vim.lsp.util.open_floating_preview(vim.split(item.full_text, "\n"), "markdown", config.options.win_config)
 end
 
 function View:jump(opts)