From 6ea06c926fc3bc495e07ab5a1b51bcb19628d771 Mon Sep 17 00:00:00 2001
From: Folke Lemaitre <folke.lemaitre@gmail.com>
Date: Wed, 26 Oct 2022 13:46:46 +0200
Subject: [PATCH] feat: markdown formatter

---
 lua/noice/config/init.lua       | 11 ++++++
 lua/noice/source/lsp/format.lua | 68 ++++-----------------------------
 lua/noice/text/markdown.lua     | 43 +++++++++++++++++++++
 3 files changed, 62 insertions(+), 60 deletions(-)
 create mode 100644 lua/noice/text/markdown.lua

diff --git a/lua/noice/config/init.lua b/lua/noice/config/init.lua
index 3efde14..c5443c7 100644
--- a/lua/noice/config/init.lua
+++ b/lua/noice/config/init.lua
@@ -77,6 +77,10 @@ M.defaults = {
     },
     hover = {
       enabled = false,
+      view = nil, -- when nil, use defaults from documentation
+      ---@type NoiceViewOptions
+      opts = {}, -- merged with defaults from documentation
+    },
       view = "hover",
       ---@type NoiceViewOptions
       opts = {
@@ -89,6 +93,13 @@ M.defaults = {
       },
     },
     hl_patterns = {
+  },
+  markdown = {
+    hover = {
+      ["|(%S-)|"] = vim.cmd.help, -- vim help links
+      ["%[.-%]%((%S-)%)"] = require("noice.util").open, -- markdown links
+    },
+    highlights = {
       ["|%S-|"] = "@text.reference",
       ["@%S+"] = "@parameter",
       ["^%s*(Parameters:)"] = "@text.title",
diff --git a/lua/noice/source/lsp/format.lua b/lua/noice/source/lsp/format.lua
index 4c9fe9c..fabefec 100644
--- a/lua/noice/source/lsp/format.lua
+++ b/lua/noice/source/lsp/format.lua
@@ -1,29 +1,17 @@
 local require = require("noice.util.lazy")
 
-local Message = require("noice.message")
-local NoiceText = require("noice.text")
-local Config = require("noice.config")
-
-local M = {}
-
----@type NoiceMessage[]
-M._messages = {}
-
-function M.get(kind)
-  if not M._messages[kind] then
-    M._messages[kind] = Message("lsp", kind)
-  end
-  M._messages[kind]:clear()
-  return M._messages[kind]
-end
+local Markdown = require("noice.text.markdown")
 
 ---@alias MarkedString string | { language: string; value: string }
 ---@alias MarkupContent { kind: ('plaintext' | 'markdown'), value: string}
 ---@alias MarkupContents MarkedString | MarkedString[] | MarkupContent
 
----@param contents MarkupContents
----@param kind LspKind
-function M.format(contents, kind)
+local M = {}
+
+-- Formats the content and adds it to the message
+---@param contents MarkupContents Markup content
+---@param message NoiceMessage Noice message
+function M.format(message, contents)
   if type(contents) ~= "table" or not vim.tbl_islist(contents) then
     contents = { contents }
   end
@@ -43,47 +31,7 @@ function M.format(contents, kind)
   end
 
   local text = table.concat(parts, "\n")
-  text = text:gsub("\n\n\n", "\n\n")
-  text = text:gsub("\n%s*\n```", "\n```")
-  text = text:gsub("```\n%s*\n", "```\n")
-
-  local lines = vim.split(text, "\n")
-
-  local width = 50
-  for _, line in pairs(lines) do
-    width = math.max(width, vim.api.nvim_strwidth(line))
-  end
-
-  local message = M.get(kind)
-  -- message.once = true
-  message.opts.title = kind
-
-  for _, line in ipairs(lines) do
-    message:newline()
-    -- Make the horizontal ruler extend the whole window width
-    if line:find("^[%*%-_][%*%-_][%*%-_]+$") then
-      message:append(NoiceText("", {
-        virt_text_win_col = 0,
-        virt_text = { { ("─"):rep(width), "@punctuation.special.markdown" } },
-        priority = 100,
-      }))
-    else
-      message:append(line)
-      for pattern, hl_group in pairs(Config.options.lsp.hl_patterns) do
-        local from, to, match = line:find(pattern)
-        if match then
-          from, to = line:find(match, from)
-        end
-        if from then
-          message:append(NoiceText(" ", {
-            hl_group = hl_group,
-            col = from - 1,
-            length = to - from + 1,
-          }))
-        end
-      end
-    end
-  end
+  Markdown.format(message, text)
   return message
 end
 
diff --git a/lua/noice/text/markdown.lua b/lua/noice/text/markdown.lua
new file mode 100644
index 0000000..c8afec4
--- /dev/null
+++ b/lua/noice/text/markdown.lua
@@ -0,0 +1,43 @@
+local require = require("noice.util.lazy")
+
+local NoiceText = require("noice.text")
+local Config = require("noice.config")
+
+local M = {}
+
+---@param message NoiceMessage
+---@param text string
+function M.format(message, text)
+  text = text:gsub("\n\n\n", "\n\n")
+  text = text:gsub("\n%s*\n```", "\n```")
+  text = text:gsub("```\n%s*\n", "```\n")
+
+  local lines = vim.split(vim.trim(text), "\n")
+
+  for l, line in ipairs(lines) do
+    if l ~= 1 then
+      message:newline()
+    end
+    -- Make the horizontal ruler extend the whole window width
+    if line:find("^[%*%-_][%*%-_][%*%-_]+$") then
+      M.horizontal_line(message)
+    else
+      message:append(line)
+      for pattern, hl_group in pairs(Config.options.markdown.highlights) do
+        local from, to, match = line:find(pattern)
+        if match then
+          from, to = line:find(match, from)
+        end
+        if from then
+          message:append(NoiceText("", {
+            hl_group = hl_group,
+            col = from - 1,
+            length = to - from + 1,
+          }))
+        end
+      end
+    end
+  end
+end
+
+return M