lite-xl/data/core/init.lua

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require "core.strict"
require "core.regex"
local common = require "core.common"
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local config = require "core.config"
local style = require "core.style"
local command
local keymap
local dirwatch
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local RootView
local StatusView
local TitleView
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local CommandView
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local NagView
local DocView
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local Doc
local core = {}
local function load_session()
local ok, t = pcall(dofile, USERDIR .. "/session.lua")
return ok and t or {}
end
local function save_session()
local fp = io.open(USERDIR .. "/session.lua", "w")
if fp then
fp:write("return {recents=", common.serialize(core.recent_projects),
", window=", common.serialize(table.pack(system.get_window_size())),
", window_mode=", common.serialize(system.get_window_mode()),
", previous_find=", common.serialize(core.previous_find),
", previous_replace=", common.serialize(core.previous_replace),
"}\n")
fp:close()
end
end
local function update_recents_project(action, dir_path_abs)
local dirname = common.normalize_volume(dir_path_abs)
if not dirname then return end
local recents = core.recent_projects
local n = #recents
for i = 1, n do
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if dirname == recents[i] then
table.remove(recents, i)
break
end
end
if action == "add" then
table.insert(recents, 1, dirname)
end
end
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function core.set_project_dir(new_dir, change_project_fn)
local chdir_ok = pcall(system.chdir, new_dir)
if chdir_ok then
if change_project_fn then change_project_fn() end
core.project_dir = common.normalize_volume(new_dir)
core.project_directories = {}
end
return chdir_ok
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end
local function reload_customizations()
core.load_user_directory()
core.load_project_module()
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end
function core.open_folder_project(dir_path_abs)
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if core.set_project_dir(dir_path_abs, core.on_quit_project) then
core.root_view:close_all_docviews()
reload_customizations()
update_recents_project("add", dir_path_abs)
core.add_project_directory(dir_path_abs)
core.on_enter_project(dir_path_abs)
end
end
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local function strip_leading_path(filename)
return filename:sub(2)
end
local function strip_trailing_slash(filename)
if filename:match("[^:][/\\]$") then
return filename:sub(1, -2)
end
return filename
end
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function core.project_subdir_is_shown(dir, filename)
return not dir.files_limit or dir.shown_subdir[filename]
end
local function show_max_files_warning(dir)
local message = dir.slow_filesystem and
"Filesystem is too slow: project files will not be indexed." or
"Too many files in project directory: stopped reading at "..
config.max_project_files.." files. For more information see "..
"usage.md at https://github.com/lite-xl/lite-xl."
if core.status_view then
core.status_view:show_message("!", style.accent, message)
end
end
-- bisects the sorted file list to get to things in ln(n)
local function file_bisect(files, is_superior, start_idx, end_idx)
local inf, sup = start_idx or 1, end_idx or #files
while sup - inf > 8 do
local curr = math.floor((inf + sup) / 2)
if is_superior(files[curr]) then
sup = curr - 1
else
inf = curr
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end
end
while inf <= sup and not is_superior(files[inf]) do
inf = inf + 1
end
return inf
end
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local function file_search(files, info)
local idx = file_bisect(files, function(file)
return system.path_compare(info.filename, info.type, file.filename, file.type)
end)
if idx > 1 and files[idx-1].filename == info.filename then
return idx - 1, true
end
return idx, false
end
local function files_info_equal(a, b)
return (a == nil and b == nil) or (a and b and a.filename == b.filename and a.type == b.type)
end
local function project_subdir_bounds(dir, filename, start_index)
local found = true
if not start_index then
start_index, found = file_search(dir.files, { type = "dir", filename = filename })
end
if found then
local end_index = file_bisect(dir.files, function(file)
return not common.path_belongs_to(file.filename, filename)
end, start_index + 1)
return start_index, end_index - start_index, dir.files[start_index]
end
end
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-- Should be called on any directory that registers a change, or on a directory we open if we're over the file limit.
-- Uses relative paths at the project root (i.e. target = "", target = "first-level-directory", target = "first-level-directory/second-level-directory")
local function refresh_directory(topdir, target)
local directory_start_idx, directory_end_idx = 1, #topdir.files
if target and target ~= "" then
directory_start_idx, directory_end_idx = project_subdir_bounds(topdir, target)
directory_end_idx = directory_start_idx + directory_end_idx - 1
directory_start_idx = directory_start_idx + 1
end
local files = dirwatch.get_directory_files(topdir, topdir.name, (target or ""), {}, 0, function() return false end)
local change = false
-- If this file doesn't exist, we should be calling this on our parent directory, assume we'll do that.
-- Unwatch just in case.
if files == nil then
topdir.watch:unwatch(topdir.name .. PATHSEP .. (target or ""))
return true
end
local new_idx, old_idx = 1, directory_start_idx
local new_directories = {}
-- Run through each sorted list and compare them. If we find a new entry, insert it and flag as new. If we're missing an entry
-- remove it and delete the entry from the list.
while old_idx <= directory_end_idx or new_idx <= #files do
local old_info, new_info = topdir.files[old_idx], files[new_idx]
if not files_info_equal(new_info, old_info) then
change = true
-- If we're a new file, and we exist *before* the other file in the list, then add to the list.
if not old_info or (new_info and system.path_compare(new_info.filename, new_info.type, old_info.filename, old_info.type)) then
table.insert(topdir.files, old_idx, new_info)
old_idx, new_idx = old_idx + 1, new_idx + 1
if new_info.type == "dir" then
table.insert(new_directories, new_info)
end
directory_end_idx = directory_end_idx + 1
else
-- If it's not there, remove the entry from the list as being out of order.
table.remove(topdir.files, old_idx)
if old_info.type == "dir" then
topdir.watch:unwatch(topdir.name .. PATHSEP .. old_info.filename)
end
directory_end_idx = directory_end_idx - 1
end
else
-- If this file is a directory, determine in ln(n) the size of the directory, and skip every file in it.
local size = old_info and old_info.type == "dir" and select(2, project_subdir_bounds(topdir, old_info.filename, old_idx)) or 1
old_idx, new_idx = old_idx + size, new_idx + 1
end
end
for i, v in ipairs(new_directories) do
topdir.watch:watch(topdir.name .. PATHSEP .. v.filename)
if not topdir.files_limit or core.project_subdir_is_shown(topdir, v.filename) then
refresh_directory(topdir, v.filename)
end
end
if change then
core.redraw = true
topdir.is_dirty = true
end
return change
end
-- Predicate function to inhibit directory recursion in get_directory_files
-- based on a time limit and the number of files.
local function timed_max_files_pred(dir, filename, entries_count, t_elapsed)
local n_limit = entries_count <= config.max_project_files
local t_limit = t_elapsed < 20 / config.fps
return n_limit and t_limit and core.project_subdir_is_shown(dir, filename)
end
function core.add_project_directory(path)
-- top directories has a file-like "item" but the item.filename
-- will be simply the name of the directory, without its path.
-- The field item.topdir will identify it as a top level directory.
path = common.normalize_volume(path)
local topdir = {
name = path,
item = {filename = common.basename(path), type = "dir", topdir = true},
files_limit = false,
is_dirty = true,
shown_subdir = {},
watch_thread = nil,
watch = dirwatch.new()
}
table.insert(core.project_directories, topdir)
local fstype = PLATFORM == "Linux" and system.get_fs_type(topdir.name) or "unknown"
topdir.force_scans = (fstype == "nfs" or fstype == "fuse")
local t, complete, entries_count = dirwatch.get_directory_files(topdir, topdir.name, "", {}, 0, timed_max_files_pred)
topdir.files = t
if not complete then
topdir.slow_filesystem = not complete and (entries_count <= config.max_project_files)
topdir.files_limit = true
show_max_files_warning(topdir)
refresh_directory(topdir)
else
for i,v in ipairs(t) do
if v.type == "dir" then topdir.watch:watch(path .. PATHSEP .. v.filename) end
end
end
topdir.watch:watch(topdir.name)
-- each top level directory gets a watch thread. if the project is small, or
-- if the ablity to use directory watches hasn't been compromised in some way
-- either through error, or amount of files, then this should be incredibly
-- quick; essentially one syscall per check. Otherwise, this may take a bit of
-- time; the watch will yield in this coroutine after 0.01 second, for 0.1 seconds.
topdir.watch_thread = core.add_thread(function()
while true do
topdir.watch:check(function(target)
if target == topdir.name then return refresh_directory(topdir) end
local dirpath = target:sub(#topdir.name + 2)
local abs_dirpath = topdir.name .. PATHSEP .. dirpath
if dirpath then
-- check if the directory is in the project files list, if not exit.
local dir_index, dir_match = file_search(topdir.files, {filename = dirpath, type = "dir"})
if not dir_match or not core.project_subdir_is_shown(topdir, topdir.files[dir_index].filename) then return end
end
return refresh_directory(topdir, dirpath)
end, 0.01, 0.01)
coroutine.yield(0.05)
end
end)
if path == core.project_dir then
core.project_files = topdir.files
end
core.redraw = true
return topdir
end
-- The function below is needed to reload the project directories
-- when the project's module changes.
local function rescan_project_directories()
local save_project_dirs = {}
local n = #core.project_directories
for i = 1, n do
local dir = core.project_directories[i]
save_project_dirs[i] = {name = dir.name, shown_subdir = dir.shown_subdir}
end
core.project_directories = {}
for i = 1, n do -- add again the directories in the project
local dir = core.add_project_directory(save_project_dirs[i].name)
if dir.files_limit then
-- We need to sort the list of shown subdirectories so that higher level
-- directories are populated first. We use the function system.path_compare
-- because it order the entries in the appropriate order.
-- TODO: we may consider storing the table shown_subdir as a sorted table
-- since the beginning.
local subdir_list = {}
for subdir in pairs(save_project_dirs[i].shown_subdir) do
table.insert(subdir_list, subdir)
end
table.sort(subdir_list, function(a, b) return system.path_compare(a, "dir", b, "dir") end)
for _, subdir in ipairs(subdir_list) do
local show = save_project_dirs[i].shown_subdir[subdir]
for j = 1, #dir.files do
if dir.files[j].filename == subdir then
-- The instructions below match when happens in TreeView:on_mouse_pressed.
-- We perform the operations only once iff the subdir is in dir.files.
-- In theory set_show below may fail and return false but is it is listed
-- there it means it succeeded before so we are optimistically assume it
-- will not fail for the sake of simplicity.
core.update_project_subdir(dir, subdir, show)
break
end
end
end
end
end
end
function core.project_dir_by_name(name)
for i = 1, #core.project_directories do
if core.project_directories[i].name == name then
return core.project_directories[i]
end
end
end
function core.update_project_subdir(dir, filename, expanded)
assert(dir.files_limit, "function should be called only when directory is in files limit mode")
dir.shown_subdir[filename] = expanded
return refresh_directory(dir, filename)
end
-- Find files and directories recursively reading from the filesystem.
-- Filter files and yields file's directory and info table. This latter
-- is filled to be like required by project directories "files" list.
local function find_files_rec(root, path)
local all = system.list_dir(root .. path) or {}
for _, file in ipairs(all) do
local file = path .. PATHSEP .. file
local info = system.get_file_info(root .. file)
if info then
info.filename = strip_leading_path(file)
if info.type == "file" then
coroutine.yield(root, info)
elseif not common.match_pattern(common.basename(info.filename), config.ignore_files) then
find_files_rec(root, PATHSEP .. info.filename)
end
end
end
end
-- Iterator function to list all project files
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local function project_files_iter(state)
local dir = core.project_directories[state.dir_index]
if state.co then
-- We have a coroutine to fetch for files, use the coroutine.
-- Used for directories that exceeds the files nuumber limit.
local ok, name, file = coroutine.resume(state.co, dir.name, "")
if ok and name then
return name, file
else
-- The coroutine terminated, increment file/dir counter to scan
-- next project directory.
state.co = false
state.file_index = 1
state.dir_index = state.dir_index + 1
dir = core.project_directories[state.dir_index]
end
else
-- Increase file/dir counter
state.file_index = state.file_index + 1
while dir and state.file_index > #dir.files do
state.dir_index = state.dir_index + 1
state.file_index = 1
dir = core.project_directories[state.dir_index]
end
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end
if not dir then return end
if dir.files_limit then
-- The current project directory is files limited: create a couroutine
-- to read files from the filesystem.
state.co = coroutine.create(find_files_rec)
return project_files_iter(state)
end
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return dir.name, dir.files[state.file_index]
end
function core.get_project_files()
local state = { dir_index = 1, file_index = 0 }
return project_files_iter, state
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end
function core.project_files_number()
local n = 0
for i = 1, #core.project_directories do
if core.project_directories[i].files_limit then return end
n = n + #core.project_directories[i].files
end
return n
end
-- create a directory using mkdir but may need to create the parent
-- directories as well.
local function create_user_directory()
local success, err = common.mkdirp(USERDIR)
if not success then
error("cannot create directory \"" .. USERDIR .. "\": " .. err)
end
for _, modname in ipairs {'plugins', 'colors', 'fonts'} do
local subdirname = USERDIR .. PATHSEP .. modname
if not system.mkdir(subdirname) then
error("cannot create directory: \"" .. subdirname .. "\"")
end
end
end
local function write_user_init_file(init_filename)
local init_file = io.open(init_filename, "w")
if not init_file then error("cannot create file: \"" .. init_filename .. "\"") end
init_file:write([[
-- put user settings here
-- this module will be loaded after everything else when the application starts
-- it will be automatically reloaded when saved
local core = require "core"
local keymap = require "core.keymap"
local config = require "core.config"
local style = require "core.style"
------------------------------ Themes ----------------------------------------
-- light theme:
-- core.reload_module("colors.summer")
--------------------------- Key bindings -------------------------------------
-- key binding:
-- keymap.add { ["ctrl+escape"] = "core:quit" }
------------------------------- Fonts ----------------------------------------
-- customize fonts:
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-- style.font = renderer.font.load(DATADIR .. "/fonts/FiraSans-Regular.ttf", 14 * SCALE)
-- style.code_font = renderer.font.load(DATADIR .. "/fonts/JetBrainsMono-Regular.ttf", 14 * SCALE)
--
-- font names used by lite:
-- style.font : user interface
-- style.big_font : big text in welcome screen
-- style.icon_font : icons
-- style.icon_big_font : toolbar icons
-- style.code_font : code
--
-- the function to load the font accept a 3rd optional argument like:
--
-- {antialiasing="grayscale", hinting="full"}
--
-- possible values are:
-- antialiasing: grayscale, subpixel
-- hinting: none, slight, full
------------------------------ Plugins ----------------------------------------
-- enable or disable plugin loading setting config entries:
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-- enable plugins.trimwhitespace, otherwise it is disable by default:
-- config.plugins.trimwhitespace = true
--
-- disable detectindent, otherwise it is enabled by default
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-- config.plugins.detectindent = false
]])
init_file:close()
end
function core.write_init_project_module(init_filename)
local init_file = io.open(init_filename, "w")
if not init_file then error("cannot create file: \"" .. init_filename .. "\"") end
init_file:write([[
-- Put project's module settings here.
-- This module will be loaded when opening a project, after the user module
-- configuration.
-- It will be automatically reloaded when saved.
local config = require "core.config"
-- you can add some patterns to ignore files within the project
-- config.ignore_files = {"^%.", <some-patterns>}
-- Patterns are normally applied to the file's or directory's name, without
-- its path. See below about how to apply filters on a path.
--
-- Here some examples:
--
-- "^%." match any file of directory whose basename begins with a dot.
--
-- When there is an '/' or a '/$' at the end the pattern it will only match
-- directories. When using such a pattern a final '/' will be added to the name
-- of any directory entry before checking if it matches.
--
-- "^%.git/" matches any directory named ".git" anywhere in the project.
--
-- If a "/" appears anywhere in the pattern except if it appears at the end or
-- is immediately followed by a '$' then the pattern will be applied to the full
-- path of the file or directory. An initial "/" will be prepended to the file's
-- or directory's path to indicate the project's root.
--
-- "^/node_modules/" will match a directory named "node_modules" at the project's root.
-- "^/build.*/" match any top level directory whose name begins with "build"
-- "^/subprojects/.+/" match any directory inside a top-level folder named "subprojects".
-- You may activate some plugins on a pre-project base to override the user's settings.
-- config.plugins.trimwitespace = true
]])
init_file:close()
end
function core.load_user_directory()
return core.try(function()
local stat_dir = system.get_file_info(USERDIR)
if not stat_dir then
create_user_directory()
end
local init_filename = USERDIR .. "/init.lua"
local stat_file = system.get_file_info(init_filename)
if not stat_file then
write_user_init_file(init_filename)
end
dofile(init_filename)
end)
end
function core.remove_project_directory(path)
-- skip the fist directory because it is the project's directory
for i = 2, #core.project_directories do
local dir = core.project_directories[i]
if dir.name == path then
table.remove(core.project_directories, i)
return true
end
end
return false
end
local function configure_borderless_window()
system.set_window_bordered(not config.borderless)
core.title_view:configure_hit_test(config.borderless)
core.title_view.visible = config.borderless
end
local function add_config_files_hooks()
-- auto-realod style when user's module is saved by overriding Doc:Save()
local doc_save = Doc.save
local user_filename = system.absolute_path(USERDIR .. PATHSEP .. "init.lua")
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function Doc:save(filename, abs_filename)
local module_filename = system.absolute_path(".lite_project.lua")
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doc_save(self, filename, abs_filename)
if self.abs_filename == user_filename or self.abs_filename == module_filename then
reload_customizations()
rescan_project_directories()
configure_borderless_window()
end
end
end
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function core.init()
command = require "core.command"
keymap = require "core.keymap"
dirwatch = require "core.dirwatch"
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RootView = require "core.rootview"
StatusView = require "core.statusview"
TitleView = require "core.titleview"
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CommandView = require "core.commandview"
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NagView = require "core.nagview"
DocView = require "core.docview"
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Doc = require "core.doc"
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if PATHSEP == '\\' then
USERDIR = common.normalize_volume(USERDIR)
DATADIR = common.normalize_volume(DATADIR)
EXEDIR = common.normalize_volume(EXEDIR)
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end
do
local session = load_session()
if session.window_mode == "normal" then
system.set_window_size(table.unpack(session.window))
elseif session.window_mode == "maximized" then
system.set_window_mode("maximized")
end
core.recent_projects = session.recents or {}
core.previous_find = session.previous_find or {}
core.previous_replace = session.previous_replace or {}
end
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local project_dir = core.recent_projects[1] or "."
local project_dir_explicit = false
local files = {}
local delayed_error
for i = 2, #ARGS do
local arg_filename = strip_trailing_slash(ARGS[i])
local info = system.get_file_info(arg_filename) or {}
if info.type == "file" then
local file_abs = system.absolute_path(arg_filename)
if file_abs then
table.insert(files, file_abs)
project_dir = file_abs:match("^(.+)[/\\].+$")
end
elseif info.type == "dir" then
project_dir = arg_filename
project_dir_explicit = true
else
-- on macOS we can get an argument like "-psn_0_52353" that we just ignore.
if not ARGS[i]:match("^-psn") then
delayed_error = string.format("error: invalid file or directory %q", ARGS[i])
end
end
end
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core.frame_start = 0
core.clip_rect_stack = {{ 0,0,0,0 }}
core.log_items = {}
core.docs = {}
core.cursor_clipboard = {}
core.cursor_clipboard_whole_line = {}
core.window_mode = "normal"
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core.threads = setmetatable({}, { __mode = "k" })
core.blink_start = system.get_time()
core.blink_timer = core.blink_start
core.redraw = true
core.visited_files = {}
core.restart_request = false
core.quit_request = false
-- We load core views before plugins that may need them.
core.root_view = RootView()
core.command_view = CommandView()
core.status_view = StatusView()
core.nag_view = NagView()
core.title_view = TitleView()
-- Some plugins (eg: console) require the nodes to be initialized to defaults
local cur_node = core.root_view.root_node
cur_node.is_primary_node = true
cur_node:split("up", core.title_view, {y = true})
cur_node = cur_node.b
cur_node:split("up", core.nag_view, {y = true})
cur_node = cur_node.b
cur_node = cur_node:split("down", core.command_view, {y = true})
cur_node = cur_node:split("down", core.status_view, {y = true})
-- Load defaiult commands first so plugins can override them
command.add_defaults()
-- Load user module, plugins and project module
local got_user_error, got_project_error = not core.load_user_directory()
local project_dir_abs = system.absolute_path(project_dir)
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-- We prevent set_project_dir below to effectively add and scan the directory because the
-- project module and its ignore files is not yet loaded.
local set_project_ok = project_dir_abs and core.set_project_dir(project_dir_abs)
if set_project_ok then
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got_project_error = not core.load_project_module()
if project_dir_explicit then
update_recents_project("add", project_dir_abs)
end
else
if not project_dir_explicit then
update_recents_project("remove", project_dir)
end
project_dir_abs = system.absolute_path(".")
if not core.set_project_dir(project_dir_abs, function()
got_project_error = not core.load_project_module()
end) then
system.show_fatal_error("Lite XL internal error", "cannot set project directory to cwd")
os.exit(1)
end
end
-- Load core plugins after user ones to let the user override them
local plugins_success, plugins_refuse_list = core.load_plugins()
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do
local pdir, pname = project_dir_abs:match("(.*)[/\\\\](.*)")
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core.log("Opening project %q from directory %s", pname, pdir)
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end
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-- We add the project directory now because the project's module is loaded.
core.add_project_directory(project_dir_abs)
-- We assume we have just a single project directory here. Now that StatusView
-- is there show max files warning if needed.
if core.project_directories[1].files_limit then
show_max_files_warning(core.project_directories[1])
end
for _, filename in ipairs(files) do
core.root_view:open_doc(core.open_doc(filename))
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end
if delayed_error then
core.error(delayed_error)
end
if not plugins_success or got_user_error or got_project_error then
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command.perform("core:open-log")
end
configure_borderless_window()
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if #plugins_refuse_list.userdir.plugins > 0 or #plugins_refuse_list.datadir.plugins > 0 then
local opt = {
{ font = style.font, text = "Exit", default_no = true },
{ font = style.font, text = "Continue" , default_yes = true }
}
local msg = {}
for _, entry in pairs(plugins_refuse_list) do
if #entry.plugins > 0 then
msg[#msg + 1] = string.format("Plugins from directory \"%s\":\n%s", common.home_encode(entry.dir), table.concat(entry.plugins, "\n"))
end
end
core.nag_view:show(
"Refused Plugins",
string.format(
"Some plugins are not loaded due to version mismatch.\n\n%s.\n\n" ..
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"Please download a recent version from https://github.com/lite-xl/lite-xl-plugins.",
table.concat(msg, ".\n\n")),
opt, function(item)
if item.text == "Exit" then os.exit(1) end
end)
end
add_config_files_hooks()
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end
function core.confirm_close_docs(docs, close_fn, ...)
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local dirty_count = 0
local dirty_name
for _, doc in ipairs(docs or core.docs) do
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if doc:is_dirty() then
dirty_count = dirty_count + 1
dirty_name = doc:get_name()
end
end
if dirty_count > 0 then
local text
if dirty_count == 1 then
text = string.format("\"%s\" has unsaved changes. Quit anyway?", dirty_name)
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else
text = string.format("%d docs have unsaved changes. Quit anyway?", dirty_count)
end
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local args = {...}
local opt = {
{ font = style.font, text = "Yes", default_yes = true },
{ font = style.font, text = "No" , default_no = true }
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}
core.nag_view:show("Unsaved Changes", text, opt, function(item)
if item.text == "Yes" then close_fn(table.unpack(args)) end
end)
else
close_fn(...)
end
end
local temp_uid = math.floor(system.get_time() * 1000) % 0xffffffff
local temp_file_prefix = string.format(".lite_temp_%08x", tonumber(temp_uid))
local temp_file_counter = 0
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local function delete_temp_files()
for _, filename in ipairs(system.list_dir(EXEDIR)) do
if filename:find(temp_file_prefix, 1, true) == 1 then
os.remove(EXEDIR .. PATHSEP .. filename)
end
end
end
function core.temp_filename(ext)
temp_file_counter = temp_file_counter + 1
return USERDIR .. PATHSEP .. temp_file_prefix
.. string.format("%06x", temp_file_counter) .. (ext or "")
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end
-- override to perform an operation before quitting or entering the
-- current project
do
local do_nothing = function() end
core.on_quit_project = do_nothing
core.on_enter_project = do_nothing
end
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local function quit_with_function(quit_fn, force)
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if force then
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delete_temp_files()
core.on_quit_project()
save_session()
quit_fn()
else
core.confirm_close_docs(core.docs, quit_with_function, quit_fn, true)
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end
end
function core.quit(force)
quit_with_function(function() core.quit_request = true end, force)
end
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function core.restart()
quit_with_function(function() core.restart_request = true end)
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end
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local function check_plugin_version(filename)
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local info = system.get_file_info(filename)
if info ~= nil and info.type == "dir" then
filename = filename .. "/init.lua"
info = system.get_file_info(filename)
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end
if not info or not filename:match("%.lua$") then return false end
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local f = io.open(filename, "r")
if not f then return false end
local version_match = false
for line in f:lines() do
local mod_version = line:match('%-%-.*%f[%a]mod%-version%s*:%s*(%d+)')
if mod_version then
version_match = (mod_version == MOD_VERSION)
break
end
-- The following pattern is used for backward compatibility only
-- Future versions will look only at the mod-version tag.
local version = line:match('%-%-%s*lite%-xl%s*(%d+%.%d+)$')
if version then
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-- we consider the version tag 2.0 equivalent to mod-version:2
version_match = (version == '2.0' and MOD_VERSION == "2")
break
end
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end
f:close()
return true, version_match
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end
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function core.load_plugins()
local no_errors = true
local refused_list = {
userdir = {dir = USERDIR, plugins = {}},
datadir = {dir = DATADIR, plugins = {}},
}
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local files, ordered = {}, {}
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for _, root_dir in ipairs {DATADIR, USERDIR} do
local plugin_dir = root_dir .. "/plugins"
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for _, filename in ipairs(system.list_dir(plugin_dir) or {}) do
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if not files[filename] then table.insert(ordered, filename) end
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files[filename] = plugin_dir -- user plugins will always replace system plugins
end
end
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table.sort(ordered)
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for _, filename in ipairs(ordered) do
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local plugin_dir, basename = files[filename], filename:match("(.-)%.lua$") or filename
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local is_lua_file, version_match = check_plugin_version(plugin_dir .. '/' .. filename)
if is_lua_file then
if not version_match then
core.log_quiet("Version mismatch for plugin %q from %s", basename, plugin_dir)
local list = refused_list[plugin_dir:find(USERDIR, 1, true) == 1 and 'userdir' or 'datadir'].plugins
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table.insert(list, filename)
end
if version_match and config.plugins[basename] ~= false then
local ok = core.try(require, "plugins." .. basename)
if ok then core.log_quiet("Loaded plugin %q from %s", basename, plugin_dir) end
if not ok then
no_errors = false
end
end
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end
end
return no_errors, refused_list
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end
function core.load_project_module()
local filename = ".lite_project.lua"
if system.get_file_info(filename) then
return core.try(function()
local fn, err = loadfile(filename)
if not fn then error("Error when loading project module:\n\t" .. err) end
fn()
core.log_quiet("Loaded project module")
end)
end
return true
end
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function core.reload_module(name)
local old = package.loaded[name]
package.loaded[name] = nil
local new = require(name)
if type(old) == "table" then
for k, v in pairs(new) do old[k] = v end
package.loaded[name] = old
end
end
function core.set_visited(filename)
for i = 1, #core.visited_files do
if core.visited_files[i] == filename then
table.remove(core.visited_files, i)
break
end
end
table.insert(core.visited_files, 1, filename)
end
function core.set_active_view(view)
assert(view, "Tried to set active view to nil")
if view ~= core.active_view then
if core.active_view and core.active_view.force_focus then
core.next_active_view = view
return
end
core.next_active_view = nil
if view.doc and view.doc.filename then
core.set_visited(view.doc.filename)
end
core.last_active_view = core.active_view
core.active_view = view
end
end
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function core.show_title_bar(show)
core.title_view.visible = show
end
function core.add_thread(f, weak_ref, ...)
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local key = weak_ref or #core.threads + 1
local args = {...}
local fn = function() return core.try(f, table.unpack(args)) end
core.threads[key] = { cr = coroutine.create(fn), wake = 0 }
return key
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end
function core.push_clip_rect(x, y, w, h)
local x2, y2, w2, h2 = table.unpack(core.clip_rect_stack[#core.clip_rect_stack])
local r, b, r2, b2 = x+w, y+h, x2+w2, y2+h2
x, y = math.max(x, x2), math.max(y, y2)
b, r = math.min(b, b2), math.min(r, r2)
w, h = r-x, b-y
table.insert(core.clip_rect_stack, { x, y, w, h })
renderer.set_clip_rect(x, y, w, h)
end
function core.pop_clip_rect()
table.remove(core.clip_rect_stack)
local x, y, w, h = table.unpack(core.clip_rect_stack[#core.clip_rect_stack])
renderer.set_clip_rect(x, y, w, h)
end
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function core.normalize_to_project_dir(filename)
filename = common.normalize_path(filename)
if common.path_belongs_to(filename, core.project_dir) then
filename = common.relative_path(core.project_dir, filename)
end
return filename
end
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-- The function below works like system.absolute_path except it
-- doesn't fail if the file does not exist. We consider that the
-- current dir is core.project_dir so relative filename are considered
-- to be in core.project_dir.
-- Please note that .. or . in the filename are not taken into account.
-- This function should get only filenames normalized using
-- common.normalize_path function.
function core.project_absolute_path(filename)
if filename:match('^%a:\\') or filename:find('/', 1, true) == 1 then
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return filename
else
return core.project_dir .. PATHSEP .. filename
end
end
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function core.open_doc(filename)
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local new_file = not filename or not system.get_file_info(filename)
local abs_filename
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if filename then
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-- normalize filename and set absolute filename then
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-- try to find existing doc for filename
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filename = core.normalize_to_project_dir(filename)
abs_filename = core.project_absolute_path(filename)
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for _, doc in ipairs(core.docs) do
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if doc.abs_filename and abs_filename == doc.abs_filename then
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return doc
end
end
end
-- no existing doc for filename; create new
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local doc = Doc(filename, abs_filename, new_file)
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table.insert(core.docs, doc)
core.log_quiet(filename and "Opened doc \"%s\"" or "Opened new doc", filename)
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return doc
end
function core.get_views_referencing_doc(doc)
local res = {}
local views = core.root_view.root_node:get_children()
for _, view in ipairs(views) do
if view.doc == doc then table.insert(res, view) end
end
return res
end
local function log(level, show, fmt, ...)
local text = string.format(fmt, ...)
if show then
local s = style.log[level]
core.status_view:show_message(s.icon, s.color, text)
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end
local info = debug.getinfo(2, "Sl")
local at = string.format("%s:%d", info.short_src, info.currentline)
local item = {
level = level,
text = text,
time = os.time(),
at = at
}
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table.insert(core.log_items, item)
if #core.log_items > config.max_log_items then
table.remove(core.log_items, 1)
end
return item
end
function core.log(...)
return log("INFO", true, ...)
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end
function core.log_quiet(...)
return log("INFO", false, ...)
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end
function core.error(...)
return log("ERROR", true, ...)
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end
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function core.get_log(i)
if i == nil then
local r = {}
for _, item in ipairs(core.log_items) do
table.insert(r, core.get_log(item))
end
return table.concat(r, "\n")
end
local item = type(i) == "number" and core.log_items[i] or i
local text = string.format("%s [%s] %s at %s", os.date(nil, item.time), item.level, item.text, item.at)
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if item.info then
text = string.format("%s\n%s\n", text, item.info)
end
return text
end
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function core.try(fn, ...)
local err
local ok, res = xpcall(fn, function(msg)
local item = core.error("%s", msg)
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item.info = debug.traceback(nil, 2):gsub("\t", "")
err = msg
end, ...)
if ok then
return true, res
end
return false, err
end
local scheduled_rescan = {}
function core.has_pending_rescan()
for _ in pairs(scheduled_rescan) do
return true
end
end
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function core.on_event(type, ...)
local did_keymap = false
if type == "textinput" then
core.root_view:on_text_input(...)
elseif type == "keypressed" then
did_keymap = keymap.on_key_pressed(...)
elseif type == "keyreleased" then
keymap.on_key_released(...)
elseif type == "mousemoved" then
core.root_view:on_mouse_moved(...)
elseif type == "mousepressed" then
if not core.root_view:on_mouse_pressed(...) then
did_keymap = keymap.on_mouse_pressed(...)
end
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elseif type == "mousereleased" then
core.root_view:on_mouse_released(...)
elseif type == "mousewheel" then
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if not core.root_view:on_mouse_wheel(...) then
did_keymap = keymap.on_mouse_wheel(...)
end
elseif type == "resized" then
core.window_mode = system.get_window_mode()
elseif type == "minimized" or type == "maximized" or type == "restored" then
core.window_mode = type == "restored" and "normal" or type
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elseif type == "filedropped" then
if not core.root_view:on_file_dropped(...) then
local filename, mx, my = ...
local info = system.get_file_info(filename)
if info and info.type == "dir" then
system.exec(string.format("%q %q", EXEFILE, filename))
else
local ok, doc = core.try(core.open_doc, filename)
if ok then
local node = core.root_view.root_node:get_child_overlapping_point(mx, my)
node:set_active_view(node.active_view)
core.root_view:open_doc(doc)
end
end
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end
elseif type == "focuslost" then
core.root_view:on_focus_lost(...)
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elseif type == "quit" then
core.quit()
end
return did_keymap
end
local function get_title_filename(view)
local doc_filename = view.get_filename and view:get_filename() or view:get_name()
return (doc_filename ~= "---") and doc_filename or ""
end
function core.compose_window_title(title)
return title == "" and "Lite XL" or title .. " - Lite XL"
end
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function core.step()
-- handle events
local did_keymap = false
for type, a,b,c,d in system.poll_event do
if type == "textinput" and did_keymap then
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did_keymap = false
elseif type == "mousemoved" then
core.try(core.on_event, type, a, b, c, d)
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else
local _, res = core.try(core.on_event, type, a, b, c, d)
did_keymap = res or did_keymap
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end
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core.redraw = true
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end
local width, height = renderer.get_size()
-- update
core.root_view.size.x, core.root_view.size.y = width, height
core.root_view:update()
if not core.redraw then return false end
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core.redraw = false
-- close unreferenced docs
for i = #core.docs, 1, -1 do
local doc = core.docs[i]
if #core.get_views_referencing_doc(doc) == 0 then
table.remove(core.docs, i)
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doc:on_close()
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end
end
-- update window title
local current_title = get_title_filename(core.active_view)
if current_title ~= core.window_title then
system.set_window_title(core.compose_window_title(current_title))
core.window_title = current_title
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end
-- draw
renderer.begin_frame()
core.clip_rect_stack[1] = { 0, 0, width, height }
renderer.set_clip_rect(table.unpack(core.clip_rect_stack[1]))
core.root_view:draw()
renderer.end_frame()
return true
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end
local run_threads = coroutine.wrap(function()
while true do
local max_time = 1 / config.fps - 0.004
local need_more_work = false
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for k, thread in pairs(core.threads) do
-- run thread
if thread.wake < system.get_time() then
local _, wait = assert(coroutine.resume(thread.cr))
if coroutine.status(thread.cr) == "dead" then
if type(k) == "number" then
table.remove(core.threads, k)
else
core.threads[k] = nil
end
elseif wait then
thread.wake = system.get_time() + wait
else
need_more_work = true
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end
end
-- stop running threads if we're about to hit the end of frame
if system.get_time() - core.frame_start > max_time then
coroutine.yield(true)
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end
end
if not need_more_work then coroutine.yield(false) end
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end
end)
function core.run()
local idle_iterations = 0
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while true do
core.frame_start = system.get_time()
local did_redraw = core.step()
local need_more_work = run_threads() or core.has_pending_rescan()
if core.restart_request or core.quit_request then break end
if not did_redraw and not need_more_work then
idle_iterations = idle_iterations + 1
-- do not wait of events at idle_iterations = 1 to give a chance at core.step to run
-- and set "redraw" flag.
if idle_iterations > 1 then
if system.window_has_focus() then
-- keep running even with no events to make the cursor blinks
local t = system.get_time() - core.blink_start
local h = config.blink_period / 2
local dt = math.ceil(t / h) * h - t
system.wait_event(dt + 1 / config.fps)
else
system.wait_event()
end
end
else
idle_iterations = 0
local elapsed = system.get_time() - core.frame_start
system.sleep(math.max(0, 1 / config.fps - elapsed))
end
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end
end
function core.blink_reset()
core.blink_start = system.get_time()
end
function core.request_cursor(value)
core.cursor_change_req = value
end
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function core.on_error(err)
-- write error to file
local fp = io.open(USERDIR .. "/error.txt", "wb")
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fp:write("Error: " .. tostring(err) .. "\n")
fp:write(debug.traceback(nil, 4) .. "\n")
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fp:close()
-- save copy of all unsaved documents
for _, doc in ipairs(core.docs) do
if doc:is_dirty() and doc.filename then
doc:save(doc.filename .. "~")
end
end
end
return core