feat: managed codemp window with custom binds

a first implementation, definitely lot to improve!!

Author: alemidev

src/buffers.lua

@@ -18,7 +18,7 @@ end
 
 local function attach(name, current, content)
 	local buffer = nil
-	if current then
+	if current ~= nil then
 		buffer = vim.api.nvim_get_current_buf()
 	else
 		buffer = vim.api.nvim_create_buf(true, true)

src/init.lua

@@ -59,6 +59,7 @@ return {
 	state = require('codemp.state'),
 	buffers = require('codemp.buffers'),
 	workspace = require('codemp.workspace'),
+	window = require('codemp.window'),
 	utils = require('codemp.utils'),
 	async = require('codemp.async'),
 }

src/window.lua

@@ -0,0 +1,87 @@
+local state = require('codemp.state')
+local utils = require('codemp.utils')
+local buffers = require('codemp.buffers')
+
+local prev_window = nil
+local window_id = nil
+local buffer_id = nil
+local ns = vim.api.nvim_create_namespace("codemp-window")
+
+local function open_buffer_under_cursor()
+	if window_id == nil then return end
+	if buffer_id == nil then return end
+	local cursor = vim.api.nvim_win_get_cursor(window_id)
+	local line = vim.api.nvim_buf_get_lines(buffer_id, cursor[1]-1, cursor[1], true)
+	if not vim.startswith(line[1], " |- ") then return end
+	local path = string.gsub(line[1], " |%- ", "")
+	if prev_window ~= nil then
+		vim.api.nvim_set_current_win(prev_window)
+	end
+	if buffers.map_rev[path] ~= nil then
+		vim.api.nvim_set_current_buf(buffers.map_rev[path])
+	else
+		buffers.attach(path)
+	end
+end
+
+local function init_window()
+	buffer_id = vim.api.nvim_create_buf(false, true)
+	vim.api.nvim_buf_set_name(buffer_id, "codemp::window")
+	vim.api.nvim_set_option_value('buftype', 'nofile', { buf = buffer_id })
+	utils.buffer.set_content(buffer_id, ">  codemp")
+	vim.api.nvim_set_option_value('modifiable', false, { buf = buffer_id })
+	vim.highlight.range(buffer_id, ns, 'InlayHint', {0,0}, {0, 1})
+	vim.highlight.range(buffer_id, ns, 'Title', {0,3}, {0, 9})
+	vim.keymap.set('n', '<CR>', function () open_buffer_under_cursor() end, { buffer = buffer_id })
+	vim.keymap.set('n', 'a', function () buffers.create(vim.fn.input("path > ", "")) end, { buffer = buffer_id })
+end
+
+local function update_window()
+	local tree = state.client:get_workspace(state.workspace).filetree
+	vim.api.nvim_set_option_value('modifiable', true, { buf = buffer_id })
+	utils.buffer.set_content(
+		buffer_id,
+		">| codemp\n |: " .. state.workspace .. "\n |\n |- "
+		.. vim.fn.join(tree, "\n |- ")
+	)
+	vim.highlight.range(buffer_id, ns, 'InlayHint', {0,0}, {0, 2})
+	vim.highlight.range(buffer_id, ns, 'Title', {0,3}, {0, 9})
+	vim.highlight.range(buffer_id, ns, 'InlayHint', {1,1}, {1, 3})
+	vim.highlight.range(buffer_id, ns, 'Directory', {1,4}, {1, 128})
+	vim.highlight.range(buffer_id, ns, 'InlayHint', {2,1}, {2, 3})
+	for n, _ in ipairs(tree) do
+		vim.highlight.range(buffer_id, ns, 'InlayHint', {2+n,1}, {2+n, 3})
+	end
+	vim.api.nvim_set_option_value('modifiable', false, { buf = buffer_id })
+end
+
+local function open_window()
+	window_id = vim.api.nvim_open_win(buffer_id, true, {
+		win = 0,
+		split = 'left',
+		width = 20,
+	})
+	vim.api.nvim_set_option_value('relativenumber', false, {})
+	vim.api.nvim_set_option_value('number', false, {})
+	vim.api.nvim_set_option_value('cursorlineopt', 'line', {})
+end
+
+local function toggle_window()
+	if window_id ~= nil then
+		vim.api.nvim_win_close(window_id, true)
+		window_id = nil
+	else
+		prev_window = vim.api.nvim_get_current_win()
+		open_window()
+	end
+end
+
+init_window()
+
+return {
+	init = init_window,
+	open = open_window,
+	update = update_window,
+	toggle = toggle_window,
+	buffer = buffer_id,
+}

src/workspace.lua

@@ -4,6 +4,7 @@ local utils = require('codemp.utils')
 local buffers = require('codemp.buffers')
 local async = require('codemp.async')
 local state = require('codemp.state')
+local window = require('codemp.window')
 
 local user_hl = {}
 local user_buffer = {}
@@ -58,6 +59,26 @@ local function join(workspace)
 	local controller = state.client:join_workspace(workspace)
 	register_cursor_callback(controller)
 	register_cursor_handler(controller)
+
+	-- TODO nvim docs say that we should stop all threads before exiting nvim
+	--  but we like to live dangerously (:
+	local refresher = vim.loop.new_async(function () vim.schedule(function() window.update() end) end)
+	vim.loop.new_thread({}, function(_id, _ws, _refresher)
+		local _codemp = require('codemp.loader').load()
+		local _workspace = _codemp.get_client(_id):get_workspace(_ws)
+		while true do
+			local success, res = pcall(_workspace.event, _workspace)
+			if success then
+				print("workspace event!")
+				_refresher:send()
+			else
+				print("error waiting for workspace event: " .. res)
+				break
+			end
+		end
+	end, state.client.id, state.workspace, refresher)
+
+	window.update()
 end
 
 local function leave()