add-plugin: tiny-inline-diagnostic.nvim

also, delete `lua/core/diagnostics.lua`, and move some of its
content (the one that are still related) to `tiny-inline-diagnostic`

lua/core/diagnostics.lua

@@ -1,17 +0,0 @@
--- [[ Diagnostic Config & Keymaps ]]
--- See :help vim.diagnostic.Opts
-vim.diagnostic.config {
-  update_in_insert = false,
-  severity_sort = true,
-  float = { border = 'rounded', source = 'if_many' },
-  underline = { severity = { min = vim.diagnostic.severity.WARN } },
-
-  -- Can switch between these as you prefer
-  virtual_text = true, -- Text shows up at the end of the line
-  virtual_lines = false, -- Text shows up underneath the line, with virtual lines
-
-  -- Auto open the float, so you can easily read the errors when jumping with `[d` and `]d`
-  jump = { float = true },
-}
-
-vim.keymap.set('n', '<leader>dq', vim.diagnostic.setloclist, { desc = 'Open diagnostic [Q]uickfix list' })

lua/core/init.lua

@@ -1,7 +1,6 @@
 require 'core.globals'
 require 'core.options'
 require 'core.keymaps'
-require 'core.diagnostics'
 require 'core.autocommands'
 require 'core.lazy-nvim'
 require 'core.ui'

lua/plugins/tiny-inline-diagnostic.lua

@@ -0,0 +1,145 @@
+return {
+  'rachartier/tiny-inline-diagnostic.nvim',
+  event = 'LspAttach',
+  priority = 1000,
+  init = function()
+    -- Disable Neovim's default virtual text diagnostics
+    -- and other diagnostic related configs
+    vim.diagnostic.config {
+      virtual_text = false,
+      severity_sort = true, -- I don't think this field is needed with tiny-inline, but I'll leave it.
+      underline = { severity = { min = vim.diagnostic.severity.WARN } },
+    }
+
+    vim.keymap.set('n', '<leader>dq', vim.diagnostic.setloclist, { desc = 'Open diagnostic [Q]uickfix list' })
+  end,
+
+  opts = {
+    -- Choose a preset style for diagnostic appearance
+    -- Available: "modern", "classic", "minimal", "powerline", "ghost", "simple", "nonerdfont", "amongus"
+    preset = 'powerline',
+
+    -- Make diagnostic background transparent
+    transparent_bg = false,
+
+    -- Make cursorline background transparent for diagnostics
+    transparent_cursorline = true,
+
+    -- Customize highlight groups for colors
+    -- Use Neovim highlight group names or hex colors like "#RRGGBB"
+    hi = {
+      error = 'DiagnosticError', -- Highlight for error diagnostics
+      warn = 'DiagnosticWarn', -- Highlight for warning diagnostics
+      info = 'DiagnosticInfo', -- Highlight for info diagnostics
+      hint = 'DiagnosticHint', -- Highlight for hint diagnostics
+      arrow = 'NonText', -- Highlight for the arrow pointing to diagnostic
+      background = 'CursorLine', -- Background highlight for diagnostics
+      mixing_color = 'Normal', -- Color to blend background with (or "None")
+    },
+
+    -- List of filetypes to disable the plugin for
+    disabled_ft = {},
+
+    options = {
+      -- Display the source of diagnostics (e.g., "lua_ls", "pyright")
+      show_source = {
+        enabled = true, -- Enable showing source names
+        if_many = false, -- Only show source if multiple sources exist for the same diagnostic
+      },
+
+      -- Display the diagnostic code of diagnostics (e.g., "F401", "no-dupe-args")
+      show_code = true,
+
+      -- Use icons from vim.diagnostic.config instead of preset icons
+      use_icons_from_diagnostic = false,
+
+      -- Color the arrow to match the severity of the first diagnostic
+      set_arrow_to_diag_color = false,
+
+      -- Throttle update frequency in milliseconds to improve performance
+      -- Higher values reduce CPU usage but may feel less responsive
+      -- Set to 0 for immediate updates (may cause lag on slow systems)
+      throttle = 20,
+
+      -- Minimum number of characters before wrapping long messages
+      softwrap = 30,
+
+      -- Control how diagnostic messages are displayed
+      -- NOTE: When using display_count = true, you need to enable multiline diagnostics with multilines.enabled = true
+      --       If you want them to always be displayed, you can also set multilines.always_show = true.
+      add_messages = {
+        messages = true, -- Show full diagnostic messages
+        display_count = false, -- Show diagnostic count instead of messages when cursor not on line
+        use_max_severity = false, -- When counting, only show the most severe diagnostic
+        show_multiple_glyphs = true, -- Show multiple icons for multiple diagnostics of same severity
+      },
+
+      -- Settings for multiline diagnostics
+      multilines = {
+        enabled = false, -- Enable support for multiline diagnostic messages
+        always_show = false, -- Always show messages on all lines of multiline diagnostics
+        trim_whitespaces = false, -- Remove leading/trailing whitespace from each line
+        tabstop = 4, -- Number of spaces per tab when expanding tabs
+        severity = nil, -- Filter multiline diagnostics by severity (e.g., { vim.diagnostic.severity.ERROR })
+      },
+
+      -- Show all diagnostics on the current cursor line, not just those under the cursor
+      show_all_diags_on_cursorline = false,
+
+      -- Only show diagnostics when the cursor is directly over them, no fallback to line diagnostics
+      show_diags_only_under_cursor = false,
+
+      -- Display related diagnostics from LSP relatedInformation
+      show_related = {
+        enabled = true, -- Enable displaying related diagnostics
+        max_count = 3, -- Maximum number of related diagnostics to show per diagnostic
+      },
+
+      -- Enable diagnostics display in insert mode
+      -- May cause visual artifacts; consider setting throttle to 0 if enabled
+      enable_on_insert = false,
+
+      -- Enable diagnostics display in select mode (e.g., during auto-completion)
+      enable_on_select = false,
+
+      -- Handle messages that exceed the window width
+      overflow = {
+        mode = 'wrap', -- "wrap": split into lines, "none": no truncation, "oneline": keep single line
+        padding = 0, -- Extra characters to trigger wrapping earlier
+      },
+
+      -- Break long messages into separate lines
+      break_line = {
+        enabled = false, -- Enable automatic line breaking
+        after = 30, -- Number of characters before inserting a line break
+      },
+
+      -- Custom function to format diagnostic messages
+      -- Receives diagnostic object, returns formatted string
+      -- Example: function(diag) return diag.message .. " [" .. diag.source .. "]" end
+      format = nil,
+
+      -- Virtual text display priority
+      -- Higher values appear above other plugins (e.g., GitBlame)
+      virt_texts = {
+        priority = 2048,
+      },
+
+      -- Filter diagnostics by severity levels
+      -- Remove severities you don't want to display
+      severity = {
+        vim.diagnostic.severity.ERROR,
+        vim.diagnostic.severity.WARN,
+        vim.diagnostic.severity.INFO,
+        vim.diagnostic.severity.HINT,
+      },
+
+      -- Events that trigger attaching diagnostics to buffers
+      -- Default is {"LspAttach"}; change only if plugin doesn't work with your LSP setup
+      overwrite_events = nil,
+
+      -- Automatically disable diagnostics when opening diagnostic float windows
+      override_open_float = false,
+    },
+  },
+}