lite-xl/data/core/init.lua

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require "core.strict"
local common = require "core.common"
local config = require "core.config"
local style = require "core.style"
local command
local keymap
local RootView
local StatusView
local CommandView
local Doc
local View
local core = {}
local function project_scan_thread()
local function diff_files(a, b)
if #a ~= #b then return true end
for i, v in ipairs(a) do
if b[i].filename ~= v.filename
or b[i].modified ~= v.modified then
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return true
end
end
end
local function compare_file(a, b)
return a.filename < b.filename
end
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local function get_files(path, t)
coroutine.yield()
t = t or {}
local size_limit = config.file_size_limit * 10e5
local all = system.list_dir(path) or {}
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local dirs, files = {}, {}
for _, file in ipairs(all) do
if not file:find("^%.") then
local file = path .. PATHSEP .. file
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local info = system.get_file_info(file)
if info and info.size < size_limit then
info.filename = file
table.insert(info.type == "dir" and dirs or files, info)
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end
end
end
table.sort(dirs, compare_file)
for _, f in ipairs(dirs) do
table.insert(t, f)
get_files(f.filename, t)
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end
table.sort(files, compare_file)
for _, f in ipairs(files) do
table.insert(t, f)
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end
return t
end
while true do
-- get project files and replace previous table if the new table is
-- different
local t = get_files(core.project_dir)
if diff_files(core.project_files, t) then
core.project_files = t
core.redraw = true
end
-- wait for next scan
coroutine.yield(config.project_scan_rate)
end
end
function core.init()
command = require "core.command"
keymap = require "core.keymap"
RootView = require "core.rootview"
View = require "core.view"
StatusView = require "core.statusview"
CommandView = require "core.commandview"
Doc = require "core.doc"
core.frame_start = 0
core.clip_rect_stack = {{ 0,0,0,0 }}
core.log_items = {}
core.docs = {}
core.threads = setmetatable({}, { __mode = "k" })
core.project_files = {}
core.project_dir = "."
local info = ARGS[2] and system.get_file_info(ARGS[2])
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if info and info.type == "dir" then
core.project_dir = ARGS[2]:gsub("[\\/]$", "")
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end
core.root_view = RootView()
core.command_view = CommandView()
core.status_view = StatusView()
core.root_view.root_node:split("down", core.command_view, true)
core.root_view.root_node.b:split("down", core.status_view, true)
core.active_view = core.root_view.root_node.a.active_view
core.add_thread(project_scan_thread)
command.add_defaults()
local got_plugin_error = not core.load_plugins()
local got_user_error = not core.try(require, "user")
local got_project_error = not core.load_project_module()
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for i = 2, #ARGS do
local filename = ARGS[i]
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local info = system.get_file_info(filename)
if info and info.type == "file" then
core.root_view:open_doc(core.open_doc(filename))
end
end
if got_plugin_error or got_user_error or got_project_error then
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command.perform("core:open-log")
end
end
function core.quit(force)
if force then
os.exit()
end
local dirty_count = 0
local dirty_name
for _, doc in ipairs(core.docs) do
if doc:is_dirty() then
dirty_count = dirty_count + 1
dirty_name = doc:get_name()
end
end
if dirty_count > 0 then
local text
if dirty_count == 1 then
text = string.format("\"%s\" has unsaved changes. Quit anyway?", dirty_name)
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else
text = string.format("%d docs have unsaved changes. Quit anyway?", dirty_count)
end
local confirm = system.show_confirm_dialog("Unsaved Changes", text)
if not confirm then return end
end
core.quit(true)
end
function core.load_plugins()
local no_errors = true
local files = system.list_dir(EXEDIR .. "/data/plugins")
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for _, filename in ipairs(files) do
local modname = "plugins." .. filename:gsub(".lua$", "")
local ok = core.try(require, modname)
if ok then
core.log_quiet("Loaded plugin %q", modname)
else
no_errors = false
end
end
return no_errors
end
function core.load_project_module()
local filename = core.project_dir .. "/.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()
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.add_thread(f, weak_ref)
local key = weak_ref or #core.threads + 1
local fn = function() return core.try(f) end
core.threads[key] = { cr = coroutine.create(fn), wake = 0 }
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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
function core.open_doc(filename)
if filename then
-- try to find existing doc for filename
local abs_filename = system.absolute_path(filename)
for _, doc in ipairs(core.docs) do
if doc.filename
and abs_filename == system.absolute_path(doc.filename) then
return doc
end
end
end
-- no existing doc for filename; create new
local doc = Doc(filename)
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(icon, icon_color, fmt, ...)
local text = string.format(fmt, ...)
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if icon then
core.status_view:show_message(icon, icon_color, text)
end
local info = debug.getinfo(2, "Sl")
local at = string.format("%s:%d", info.short_src, info.currentline)
local item = { 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("i", style.text, ...)
end
function core.log_quiet(...)
return log(nil, nil, ...)
end
function core.error(...)
return log("!", style.accent, ...)
end
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
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
core.root_view:on_mouse_pressed(...)
elseif type == "mousereleased" then
core.root_view:on_mouse_released(...)
elseif type == "mousewheel" then
core.root_view:on_mouse_wheel(...)
elseif type == "filedropped" then
local mx, my = core.root_view.mouse.x, core.root_view.mouse.y
local ok, doc = core.try(core.open_doc, select(1, ...))
if ok then
core.root_view:on_mouse_pressed("left", mx, my, 1)
core.root_view:open_doc(doc)
end
elseif type == "quit" then
core.quit()
end
return did_keymap
end
function core.step()
-- handle events
local event_count = 0
local did_keymap = false
local mouse_moved = false
local mouse = { x = 0, y = 0, dx = 0, dy = 0 }
for type, a,b,c,d in system.poll_event do
if type == "mousemoved" then
mouse_moved = true
mouse.x, mouse.y = a, b
mouse.dx, mouse.dy = mouse.dx + c, mouse.dy + d
elseif type == "textinput" and did_keymap then
did_keymap = false
else
did_keymap = core.on_event(type, a, b, c, d) or did_keymap
end
event_count = event_count + 1
end
if mouse_moved then
core.on_event("mousemoved", mouse.x, mouse.y, mouse.dx, mouse.dy)
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 (event_count > 0 or core.redraw) then
return
end
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)
core.log_quiet("Closed doc \"%s\"", doc:get_name())
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end
end
-- update window title
local name = core.active_view:get_name()
if name ~= "---" then
system.set_window_title(name .. " - lite")
else
system.set_window_title("lite")
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()
end
local run_threads = coroutine.wrap(function()
while true do
local max_time = 1 / config.fps - 0.004
local ran_any_threads = false
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
end
ran_any_threads = true
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()
end
end
if not ran_any_threads then coroutine.yield() end
end
end)
function core.run()
while true do
core.frame_start = system.get_time()
core.step()
run_threads()
local elapsed = system.get_time() - core.frame_start
system.sleep(math.max(0, 1 / config.fps - elapsed))
end
end
function core.on_error(err)
-- write error to file
local fp = io.open(EXEDIR .. "/error.txt", "wb")
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fp:write("Error: " .. tostring(err) .. "\n")
fp:write(debug.traceback(nil, 4))
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