feat(picker): added notifications picker. Closes #738

lua/snacks/picker/config/defaults.lua

@@ -140,6 +140,10 @@ local defaults = {
       show_always = false, -- only show the selected column when there are multiple selections
       unselected = true, -- use the unselected icon for unselected items
     },
+    severity = {
+      icons = true, -- show severity icons
+      level = false, -- show severity level
+    },
   },
   ---@class snacks.picker.previewers.Config
   previewers = {

lua/snacks/picker/config/sources.lua

@@ -508,6 +508,15 @@ M.marks = {
   ["local"] = true,
 }
 
+---@class snacks.picker.notifications.Config: snacks.picker.Config
+---@field filter? snacks.notifier.level|fun(notif: snacks.notifier.Notif): boolean
+M.notifications = {
+  finder = "snacks_notifier",
+  format = "notification",
+  preview = "preview",
+  formatters = { severity = { level = true } },
+}
+
 -- List all available sources
 M.pickers = {
   finder = "meta_pickers",

lua/snacks/picker/format.lua

@@ -13,8 +13,14 @@ function M.severity(item, picker)
   local lower = severity:lower()
   local cap = severity:sub(1, 1):upper() .. lower:sub(2)
 
-  ret[#ret + 1] = { picker.opts.icons.diagnostics[cap], "Diagnostic" .. cap, virtual = true }
-  ret[#ret + 1] = { " ", virtual = true }
+  if picker.opts.formatters.severity.icons then
+    ret[#ret + 1] = { picker.opts.icons.diagnostics[cap], "Diagnostic" .. cap, virtual = true }
+    ret[#ret + 1] = { " ", virtual = true }
+  end
+  if picker.opts.formatters.severity.level then
+    ret[#ret + 1] = { lower:upper(), "Diagnostic" .. cap, virtual = true }
+    ret[#ret + 1] = { " ", virtual = true }
+  end
   return ret
 end
 
@@ -548,4 +554,22 @@ function M.icon(item, picker)
   return ret
 end
 
+function M.notification(item, picker)
+  local a = Snacks.picker.util.align
+  local ret = {} ---@type snacks.picker.Highlight[]
+  local notif = item.item ---@type snacks.notifier.Notif
+  ret[#ret + 1] = { a(os.date("%R", notif.added), 5), "SnacksPickerTime" }
+  ret[#ret + 1] = { " " }
+  if item.severity then
+    vim.list_extend(ret, M.severity(item, picker))
+  end
+  ret[#ret + 1] = { " " }
+  ret[#ret + 1] = { a(notif.title or "", 15), "SnacksNotifierHistoryTitle" }
+  ret[#ret + 1] = { " " }
+  ret[#ret + 1] = { notif.msg, "SnacksPickerNotificationMessage" }
+  Snacks.picker.highlight.markdown(ret)
+  -- ret[#ret + 1] = { " " }
+  return ret
+end
+
 return M

lua/snacks/picker/source/snacks.lua

@@ -0,0 +1,23 @@
+local M = {}
+
+---@param opts snacks.picker.notifications.Config
+function M.notifier(opts)
+  local notifs = Snacks.notifier.get_history({ filter = opts.filter })
+  local items = {} ---@type snacks.picker.finder.Item[]
+
+  for _, notif in ipairs(notifs) do
+    items[#items + 1] = {
+      text = Snacks.picker.util.text(notif, { "level", "title", "msg" }),
+      item = notif,
+      severity = notif.level,
+      preview = {
+        text = notif.msg,
+        ft = "markdown",
+      },
+    }
+  end
+
+  return items
+end
+
+return M

lua/snacks/picker/util/highlight.lua

@@ -159,7 +159,13 @@ end
 ---@param line snacks.picker.Highlight[]
 function M.markdown(line)
   M.highlight(line, {
+    ["^# .*"] = "@markup.heading.1.markdown",
+    ["^## .*"] = "@markup.heading.2.markdown",
+    ["^### .*"] = "@markup.heading.3.markdown",
+    ["^#### .*"] = "@markup.heading.4.markdown",
+    ["^##### .*"] = "@markup.heading.5.markdown",
     ["`.-`"] = "SnacksPickerCode",
+    ["^%s*[%-%*]"] = "@markup.list.markdown",
     ["%*.-%*"] = "SnacksPickerItalic",
     ["%*%*.-%*%*"] = "SnacksPickerBold",
   })
@@ -194,6 +200,9 @@ function M.to_text(line, opts)
   local col = offset
   local parts = {} ---@type string[]
   for _, text in ipairs(line) do
+    if (type(text[2]) == "string" and text[1] == nil) or vim.tbl_isempty(text) then
+      text[1] = ""
+    end
     if type(text[1]) == "string" then
       ---@cast text snacks.picker.Text
       if text.virtual then