From e27c87f88a7f726058e7672eeb980bfe1dad2d12 Mon Sep 17 00:00:00 2001
From: fdschmidt93 <39233597+fdschmidt93@users.noreply.github.com>
Date: Thu, 10 Jun 2021 23:10:18 +0200
Subject: feat: add filtering by symbol(s) to lsp_{document,workspace}_symbols
 (#903)

---
 lua/telescope/utils.lua | 73 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 71 insertions(+), 2 deletions(-)

(limited to 'lua/telescope/utils.lua')

diff --git a/lua/telescope/utils.lua b/lua/telescope/utils.lua
index 727330d..d9e4ec0 100644
--- a/lua/telescope/utils.lua
+++ b/lua/telescope/utils.lua
@@ -82,6 +82,75 @@ utils.quickfix_items_to_entries = function(locations)
   return results
 end
 
+utils.filter_symbols = function(results, opts)
+  if opts.symbols == nil then
+    return results
+  end
+  local valid_symbols = vim.tbl_map(string.lower, vim.lsp.protocol.SymbolKind)
+
+  local filtered_symbols = {}
+  if type(opts.symbols) == "string" then
+    opts.symbols = string.lower(opts.symbols)
+    if vim.tbl_contains(valid_symbols, opts.symbols) then
+      for _, result in ipairs(results) do
+        if string.lower(result.kind) == opts.symbols then
+          table.insert(filtered_symbols, result)
+        end
+      end
+    else
+      print(string.format("%s is not a valid symbol per `vim.lsp.protocol.SymbolKind`", opts.symbols))
+    end
+  elseif type(opts.symbols) == "table" then
+    opts.symbols = vim.tbl_map(string.lower, opts.symbols)
+    local mismatched_symbols = {}
+    for _, symbol in ipairs(opts.symbols) do
+      if vim.tbl_contains(valid_symbols, symbol) then
+        for _, result in ipairs(results) do
+          if string.lower(result.kind) == symbol then
+            table.insert(filtered_symbols, result)
+          end
+        end
+      else
+        table.insert(mismatched_symbols, symbol)
+        mismatched_symbols = table.concat(mismatched_symbols, ", ")
+        print(string.format("%s are not valid symbols per `vim.lsp.protocol.SymbolKind`", mismatched_symbols))
+      end
+    end
+  else
+    print("Please pass filtering symbols as either a string or a list of strings")
+    return
+  end
+
+  local current_buf = vim.api.nvim_get_current_buf()
+  if not vim.tbl_isempty(filtered_symbols) then
+    -- filter adequately for workspace symbols
+    local filename_to_bufnr = {}
+    for _, symbol in ipairs(filtered_symbols) do
+      if filename_to_bufnr[symbol.filename] == nil then
+        filename_to_bufnr[symbol.filename] = vim.uri_to_bufnr(vim.uri_from_fname(symbol.filename))
+      end
+      symbol['bufnr'] = filename_to_bufnr[symbol.filename]
+    end
+    table.sort(filtered_symbols, function(a, b)
+      if a.bufnr == b.bufnr then
+        return a.lnum < b.lnum
+      end
+      if a.bufnr == current_buf then
+        return true
+      end
+      if b.bufnr == current_buf then
+        return false
+      end
+      return a.bufnr < b.bufnr
+    end)
+  return filtered_symbols
+  end
+  -- only account for string|table as function otherwise already printed message and returned nil
+  local symbols = type(opts.symbols) == 'string' and opts.symbols or table.concat(opts.symbols, ', ')
+  print(string.format("%s symbol(s) were not part of the query results", symbols))
+  return
+end
+
 local convert_diagnostic_type = function(severity)
   -- convert from string to int
   if type(severity) == 'string' then
@@ -115,7 +184,7 @@ utils.diagnostics_to_tbl = function(opts)
   opts.severity_bound = convert_diagnostic_type(opts.severity_bound)
 
   local validate_severity = 0
-  for _, v in pairs({opts.severity, opts.severity_limit, opts.severity_bound}) do
+  for _, v in ipairs({opts.severity, opts.severity_limit, opts.severity_bound}) do
     if v ~= nil then
       validate_severity = validate_severity + 1
     end
@@ -149,7 +218,7 @@ utils.diagnostics_to_tbl = function(opts)
   local buffer_diags = opts.get_all and vim.lsp.diagnostic.get_all() or
     {[current_buf] = vim.lsp.diagnostic.get(current_buf, opts.client_id)}
   for bufnr, diags in pairs(buffer_diags) do
-    for _, diag in pairs(diags) do
+    for _, diag in ipairs(diags) do
       -- workspace diagnostics may include empty tables for unused bufnr
       if not vim.tbl_isempty(diag) then
         if filter_diag_severity(opts, diag.severity) then
-- 
cgit v1.2.3