feat: add wrapped-default as render (#286)

* feat: add wrapped-default as render

* test(notify): add validation tests for max_width and prefix_length

- Added unit tests to validate `max_width` and ensure it does not exceed the terminal width.
- Ensured `prefix_length` is within the valid range to prevent 'col out of range' errors.
- Improved test coverage for rendering and notification layout in `nvim-notify`.

These changes address issues related to invalid column rendering and out-of-bounds errors.

---------

Co-authored-by: rvjs <renato.valentim@tempest.com.br>

README.md

@@ -232,6 +232,10 @@ Mostly same as `compact`, but lines are wrapped based on `max_width`, some paddi
 
 ![image](https://github.com/rcarriga/nvim-notify/assets/73286100/72237d45-6e3b-4c2a-8010-513a26871682)
 
+5. "wrapped-default"
+
+Similar to `default`, but lines are wrapped based on `max_width`, some padding is added.
+
 Feel free to submit custom rendering functions to share with others!
 
 ### Animation Style

lua/notify/render/init.lua

@@ -12,6 +12,7 @@
 --- - `"simple"`
 --- - `"compact"`
 --- - `"wrapped-compact"`
+--- - `"wrapped-default"`
 ---
 --- Custom functions should accept a buffer, a notification record and a highlights table
 ---

lua/notify/render/wrapped-default.lua

@@ -0,0 +1,86 @@
+local vim_api = vim.api
+local base = require("notify.render.base")
+
+---@param line string
+---@param width number
+---@return table
+local function split_length(line, width)
+  local text = {}
+  local next_line
+  while true do
+    if #line == 0 then
+      return text
+    end
+    next_line, line = line:sub(1, width), line:sub(width + 1)
+    text[#text + 1] = next_line
+  end
+end
+
+---@param lines string[]
+---@param max_width number
+---@return table
+local function custom_wrap(lines, max_width)
+  local wrapped_lines = {}
+  for _, line in pairs(lines) do
+    local new_lines = split_length(line, max_width)
+    for _, nl in ipairs(new_lines) do
+      nl = nl:gsub("^%s*", " "):gsub("%s*$", " ")
+      table.insert(wrapped_lines, nl)
+    end
+  end
+  return wrapped_lines
+end
+
+---@param bufnr number
+---@param notif notify.Record
+---@param highlights notify.Highlights
+---@param config notify.Config
+return function(bufnr, notif, highlights, config)
+  local namespace = base.namespace()
+  local icon = notif.icon .. " "
+  local title = notif.title[1] or "Notify"
+
+  local terminal_width = vim.o.columns
+  local default_max_width = math.floor((terminal_width * 30) / 100)
+  local max_width = config.max_width and config.max_width() or default_max_width
+
+  -- Ensure max_width is within bounds
+  max_width = math.max(10, math.min(max_width, terminal_width - 1))
+
+  local message = custom_wrap(notif.message, max_width)
+
+  local prefix = string.format(" %s %s", icon, title)
+  table.insert(message, 1, prefix)
+  table.insert(message, 2, string.rep("━", max_width))
+
+  vim_api.nvim_buf_set_lines(bufnr, 0, -1, false, message)
+
+  local prefix_length = vim.str_utfindex(prefix)
+  prefix_length = math.min(prefix_length, max_width - 1)
+
+  vim_api.nvim_buf_set_extmark(bufnr, namespace, 0, 0, {
+    virt_text = {
+      { " " },
+      { icon, highlights.icon },
+      { title, highlights.title },
+      { " " },
+    },
+    virt_text_win_col = 0,
+    priority = 10,
+  })
+
+  vim_api.nvim_buf_set_extmark(bufnr, namespace, 1, 0, {
+    virt_text = {
+      { string.rep("━", max_width), highlights.border },
+    },
+    virt_text_win_col = 0,
+    priority = 10,
+  })
+
+  vim_api.nvim_buf_set_extmark(bufnr, namespace, 2, prefix_length + 1, {
+    hl_group = highlights.body,
+    end_line = #message,
+    end_col = 0,
+    priority = 50,
+  })
+end

tests/unit/init_spec.lua

@@ -45,6 +45,29 @@ describe("checking public interface", function()
         assert.is.True(called)
       end)
 
+      a.it("validates max width and prefix length", function()
+        local terminal_width = vim.o.columns
+        notify.setup({
+          background_colour = "#000000",
+          max_width = function()
+            return math.min(terminal_width, 50)
+          end,
+        })
+
+        local win = notify.async("test", "info").events.open()
+
+        assert.is.True(vim.api.nvim_win_get_width(win) <= terminal_width)
+
+        local notif = notify.notify("Test Notification", "info", {
+          title = "Long Title That Should Be Cut Off",
+        })
+
+        local prefix_title = notif.title and notif.title[1] or "Default Title"
+
+        local prefix_length = vim.str_utfindex(prefix_title)
+        assert.is.True(prefix_length <= terminal_width)
+      end)
+
       a.it("uses custom render in call", function()
         local called = false
         notify
@@ -87,7 +110,7 @@ describe("checking public interface", function()
     end)
   end)
 
-  a.it("uses the confgured minimum width", function()
+  a.it("uses the configured minimum width", function()
     notify.setup({
       background_colour = "#000000",
       minimum_width = 20,