From 7bd2e1504d0bf3fc9c97faa125949c3fd97a61d0 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Tue, 2 May 2023 21:31:06 +0100
Subject: [PATCH] home: vim: lua: lsp: customize diagnostics display

---
 home/vim/lua/ambroisie/lsp.lua | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/home/vim/lua/ambroisie/lsp.lua b/home/vim/lua/ambroisie/lsp.lua
index f935c2f..254d243 100644
--- a/home/vim/lua/ambroisie/lsp.lua
+++ b/home/vim/lua/ambroisie/lsp.lua
@@ -34,8 +34,32 @@ M.on_attach = function(client, bufnr)
         utils.dump(vim.lsp.buf.list_workspace_folders())
     end
 
-    local function show_line_diagnostics()
-        vim.diagnostic.open_float(nil, { scope="line" })
+    local function cycle_diagnostics_display()
+        -- Cycle from:
+        -- * nothing displayed
+        -- * single diagnostic at the end of the line (`virtual_text`)
+        -- * full diagnostics using virtual text (`virtual_lines`)
+        local text =  vim.diagnostic.config().virtual_text
+        local lines = vim.diagnostic.config().virtual_lines
+
+        -- Text -> Lines transition
+        if text then
+            text = false
+            lines = true
+        -- Lines -> Nothing transition
+        elseif lines then
+            text = false
+            lines = false
+        -- Nothing -> Text transition
+        else
+            text = true
+            lines = false
+        end
+
+        vim.diagnostic.config({
+            virtual_text = text,
+            virtual_lines = lines,
+        })
     end
 
     local function show_buffer_diagnostics()
@@ -53,7 +77,7 @@ M.on_attach = function(client, bufnr)
         ["<leader>c"] = {
             name = "Code",
             a = { vim.lsp.buf.code_action, "Code actions" },
-            d = { show_line_diagnostics, "Show line diagnostics" },
+            d = { cycle_diagnostics_display, "Cycle diagnostics display" },
             D = { show_buffer_diagnostics, "Show buffer diagnostics" },
             r = { vim.lsp.buf.rename, "Rename symbol" },
             s = { vim.lsp.buf.signature_help, "Show signature" },