Add a new option: scrollview_signs_max_per_row_by_group

Author: dstein64

autoload/scrollview.vim

@@ -106,6 +106,10 @@ let g:scrollview_signs_info_excluded =
 " Set to 0 to disable signs.
 let g:scrollview_signs_max_per_row =
       \ get(g:, 'scrollview_signs_max_per_row', -1)
+" Specifies the maximum number of signs per row, by group. -1 and 0 have the
+" same meaning as for scrollview_signs_max_per_row.
+let g:scrollview_signs_max_per_row_by_group =
+      \ get(g:, 'scrollview_signs_max_per_row_by_group', {})
 " Sign groups to enable on startup. If 'all' is included, it effectively
 " expands to all built-in plugins. If 'defaults' is included, it effectively
 " expands to built-in plugins that would ordinarily be enabled by default.

doc/scrollview.txt

@@ -386,6 +386,13 @@ scrollview_signs_max_per_row               *scrollview_signs_max_per_row*
                        |Number| specifying the maximum number of signs per row.
                        Set to `-1` to have no limit. Defaults to `-1`.
 
+scrollview_signs_max_per_row_by_group      *scrollview_signs_max_per_row_by_group*
+                       |Dictionary| mapping sign groups (|String|) to maximum
+                       number of corresponding signs per row (|Number|). Groups
+                       not present in the dictionary, or that have a value of
+                       `-1`, have no group-specific limit. Defaults to `{}`.
+                       Example: `{'diagnostics': 1, 'keywords': 2}`.
+
 scrollview_signs_on_startup                *scrollview_signs_on_startup*
                        |List| of |String|s specifying built-in sign groups to
                        enable on startup. Set to `[]` to disable all built-in

doc/tags

@@ -126,6 +126,7 @@ scrollview_search_symbol	scrollview.txt	/*scrollview_search_symbol*
 scrollview_signs_hidden_for_insert	scrollview.txt	/*scrollview_signs_hidden_for_insert*
 scrollview_signs_info_excluded	scrollview.txt	/*scrollview_signs_info_excluded*
 scrollview_signs_max_per_row	scrollview.txt	/*scrollview_signs_max_per_row*
+scrollview_signs_max_per_row_by_group	scrollview.txt	/*scrollview_signs_max_per_row_by_group*
 scrollview_signs_on_startup	scrollview.txt	/*scrollview_signs_on_startup*
 scrollview_signs_overflow	scrollview.txt	/*scrollview_signs_overflow*
 scrollview_signs_scrollbar_overlap	scrollview.txt	/*scrollview_signs_scrollbar_overlap*

lua/scrollview.lua

@@ -1868,6 +1868,22 @@ local show_signs = function(winid, sign_winids, bar_winid)
         return a.sign_spec_id < b.sign_spec_id
       end
     end)
+    -- Apply max per row by group.
+    local max_signs_per_row_by_group = vim.g.scrollview_signs_max_per_row_by_group
+    if not vim.tbl_isempty(max_signs_per_row_by_group) then
+      local group_counts = {}
+      local filtered_list = {}
+      for _, props in ipairs(props_list) do
+        local group = sign_specs[props.sign_spec_id].group
+        local group_limit = max_signs_per_row_by_group[group] or -1
+        group_counts[group] = (group_counts[group] or 0) + 1
+        if group_limit < 0 or group_counts[group] <= group_limit then
+          table.insert(filtered_list, props)
+        end
+      end
+      props_list = filtered_list
+    end
+    -- Apply global max per row.
     local max_signs_per_row = vim.g.scrollview_signs_max_per_row
     if max_signs_per_row >= 0 then
       props_list = vim.list_slice(props_list, 1, max_signs_per_row)