From 99c497e34f45194d4d52982c89f720c93942be36 Mon Sep 17 00:00:00 2001
From: Lintao <lintao.amons@outlook.com>
Date: Sun, 31 Mar 2024 21:51:38 +0800
Subject: [PATCH 1/2] feat: show diagnostic with fallbacks

---
 lua/lspsaga/command.lua         |  3 +++
 lua/lspsaga/diagnostic/show.lua | 20 +++++++++++++++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/lua/lspsaga/command.lua b/lua/lspsaga/command.lua
index aab58bed7..b3cff4891 100644
--- a/lua/lspsaga/command.lua
+++ b/lua/lspsaga/command.lua
@@ -25,6 +25,9 @@ local subcommands = {
   hover_doc = function(args)
     require('lspsaga.hover'):render_hover_doc(args)
   end,
+  show_diagnostics = function(args)
+    require('lspsaga.diagnostic.show'):show_diagnostics({ fallback = true, args = args })
+  end,
   show_workspace_diagnostics = function(args)
     require('lspsaga.diagnostic.show'):show_diagnostics({ workspace = true, args = args })
   end,
diff --git a/lua/lspsaga/diagnostic/show.lua b/lua/lspsaga/diagnostic/show.lua
index bcc1606cb..113566054 100644
--- a/lua/lspsaga/diagnostic/show.lua
+++ b/lua/lspsaga/diagnostic/show.lua
@@ -336,13 +336,31 @@ function sd:show(opt)
   end)
 end
 
+local function get_diagnostic_entrys(opt)
+  if opt.fallback then
+    local scopes = { 'cursor', 'line', 'buffer' }
+    for _, scope in ipairs(scopes) do
+      local result = diag:get_diagnostic({ [scope] = true })
+      if not (next(result) == nil) then
+        opt[scope] = true -- not sure if it's a good idea to modify the opt table here
+        return result
+      end
+    end
+
+    return diag:get_diagnostic({})
+  else
+    return diag:get_diagnostic(opt)
+  end
+end
+
 function sd:show_diagnostics(opt)
   local has_jump_win = require('lspsaga.diagnostic').winid
   if has_jump_win and api.nvim_win_is_valid(has_jump_win) then
     return
   end
 
-  local entrys = diag:get_diagnostic(opt)
+  local entrys = get_diagnostic_entrys(opt)
+
   if next(entrys) == nil then
     return
   end

From e730a9796f9c7e5075f4f7c9da37577f810619a5 Mon Sep 17 00:00:00 2001
From: Lintao <lintao.amons@outlook.com>
Date: Mon, 1 Apr 2024 21:54:44 +0800
Subject: [PATCH 2/2] refactor: check diag by table length instead of next

---
 lua/lspsaga/diagnostic/show.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lua/lspsaga/diagnostic/show.lua b/lua/lspsaga/diagnostic/show.lua
index 113566054..59bf7b45b 100644
--- a/lua/lspsaga/diagnostic/show.lua
+++ b/lua/lspsaga/diagnostic/show.lua
@@ -341,7 +341,7 @@ local function get_diagnostic_entrys(opt)
     local scopes = { 'cursor', 'line', 'buffer' }
     for _, scope in ipairs(scopes) do
       local result = diag:get_diagnostic({ [scope] = true })
-      if not (next(result) == nil) then
+      if #result > 0 then
         opt[scope] = true -- not sure if it's a good idea to modify the opt table here
         return result
       end