BREAKING,feat: Customizable guide markers

See readme

README.md

@@ -48,7 +48,8 @@ Features/Changes:
     - simrat39/symbols-outline.nvim#207
 
 - Feat: when `auto_close=true` only auto close if `goto_location` is used (where
-focus changed), and not for `focus_location` (simrat39/symbols-outline.nvim#119)
+  focus changed), and not for `focus_location`
+  (simrat39/symbols-outline.nvim#119)
 
 - Feat: Cursorline option for the outline window
 
@@ -64,6 +65,9 @@ focus changed), and not for `focus_location` (simrat39/symbols-outline.nvim#119)
 - Feat: Added function and command to show provider and outline window status,
   somewhat like `:LspInfo`.
 
+- BREAKING: Marker icons used for guides can now be customized. `show_guides`
+  deprecated in favor of `guides.enabled`.
+
 Fixes:
 
 - Fix symbol preview (simrat39/symbols-outline.nvim#176)
@@ -284,8 +288,16 @@ local opts = {
 
   -- Whether to highlight the currently hovered symbol (high cpu usage)
   highlight_hovered_item = true,
-  -- Whether to show outline guides
-  show_guides = true,
+  -- Options for outline guides
+  guides = {
+    enabled = true,
+    markers = {
+      bottom = '└',
+      middle = '├',
+      vertical = '│',
+      horizontal = '─',
+    },
+  },
   -- Automatically open preview of code on hover
   auto_preview = false,
   -- Automatically open hover_symbol when opening toggle_preview (see keymaps).

lua/symbols-outline/config.lua

@@ -6,7 +6,15 @@ M.defaults = {
   position = 'right',
   width = 25,
   highlight_hovered_item = true,
-  show_guides = true,
+  guides = {
+    enabled = true,
+    markers = {
+      bottom = '└',
+      middle = '├',
+      vertical = '│',
+      horizontal = '─',
+    },
+  },
   border = 'single',
   relative_width = true,
   auto_close = false,

lua/symbols-outline/parser.lua

@@ -113,19 +113,21 @@ function M.get_lines(flattened_outline_items)
 
     for index, _ in ipairs(line) do
       -- all items start with a space (or two)
-      if config.options.show_guides then
-        -- makes the guides
+      if config.options.guides.enabled then
+        -- makes the guides and add guide markers
+        local guide_markers = config.options.guides.markers
         if index == 1 then
           line[index] = ' '
           -- if index is last, add a bottom marker if current item is last,
           -- else add a middle marker
         elseif index == #line then
           -- add fold markers
-          if config.options.fold_markers and folding.is_foldable(node) then
+          local fold_markers = config.options.fold_markers
+          if fold_markers and folding.is_foldable(node) then
             if folding.is_folded(node) then
-              line[index] = config.options.fold_markers[1]
+              line[index] = fold_markers[1]
             else
-              line[index] = config.options.fold_markers[2]
+              line[index] = fold_markers[2]
             end
 
             add_guide_hl(
@@ -136,16 +138,16 @@ function M.get_lines(flattened_outline_items)
             -- the root level has no vertical markers
           elseif depth > 1 then
             if node.isLast then
-              line[index] = ui.markers.bottom
+              line[index] = guide_markers.bottom
               add_guide_hl(
                 running_length,
-                running_length + vim.fn.strlen(ui.markers.bottom) - 1
+                running_length + vim.fn.strlen(guide_markers.bottom) - 1
               )
             else
-              line[index] = ui.markers.middle
+              line[index] = guide_markers.middle
               add_guide_hl(
                 running_length,
-                running_length + vim.fn.strlen(ui.markers.middle) - 1
+                running_length + vim.fn.strlen(guide_markers.middle) - 1
               )
             end
           end
@@ -153,11 +155,11 @@ function M.get_lines(flattened_outline_items)
           -- vertical marker because there are items under us and we need
           -- to point to those
         elseif not node.hierarchy[index] and depth > 1 then
-          line[index + marker_space] = ui.markers.vertical
+          line[index + marker_space] = guide_markers.vertical
           add_guide_hl(
             running_length - 1 + 2 * marker_space,
             running_length
-              + vim.fn.strlen(ui.markers.vertical)
+              + vim.fn.strlen(guide_markers.vertical)
               - 1
               + 2 * marker_space
           )

lua/symbols-outline/ui.lua

@@ -1,12 +1,5 @@
 local M = {}
 
-M.markers = {
-  bottom = '└',
-  middle = '├',
-  vertical = '│',
-  horizontal = '─',
-}
-
 M.hovered_hl_ns = vim.api.nvim_create_namespace 'hovered_item'
 
 function M.clear_hover_highlight(bufnr)

lua/symbols-outline/view.lua

@@ -32,7 +32,7 @@ function View:setup_view()
   vim.api.nvim_win_set_option(self.winnr, 'wrap', config.options.wrap)
   vim.api.nvim_win_set_option(self.winnr, 'linebreak', true) -- only has effect when wrap=true
   vim.api.nvim_win_set_option(self.winnr, 'breakindent', true) -- only has effect when wrap=true
-  --  Would be nice to use ui.markers.vertical as part of showbreak to keep
+  --  Would be nice to use guides.markers.vertical as part of showbreak to keep
   --  continuity of the tree UI, but there's currently no way to style the
   --  color, apart from globally overriding hl-NonText, which will potentially
   --  mess with other theme/user settings. So just use empty spaces for now.