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-- Copyright 2025 David Vazgenovich Shakaryan
local util = require('util')
local state = {}
local mt = {}
mt.__index = mt
local menu_mt = {}
menu_mt.__index = menu_mt
function state.new()
return setmetatable({
menus = {},
depth = 0,
favourites = {},
playing_id = nil,
}, mt)
end
function mt:menu()
return self.menus[self.depth]
end
function mt:push_menu(t)
local menu = setmetatable({
options = {},
cursor = 1,
view_top = 1,
}, menu_mt)
for k, v in pairs(t) do
menu[k] = v
end
if menu.type == 'search' then
menu.search_options = menu.options
menu.search_text = menu.search_text or ''
menu.search_cursor = menu.search_cursor or
#menu.search_text + 1
menu:update_search_matches()
end
self.depth = self.depth + 1
self.menus[self.depth] = menu
return menu
end
-- returns index if found
function mt:favourited(id)
for i, v in ipairs(self.favourites) do
if v == id then
return i
end
end
end
function mt:add_favourite(id)
self.favourites[#self.favourites+1] = id
end
function mt:remove_favourite_at(i)
table.remove(self.favourites, i)
end
-- inserts the given id into the favourites array before the next favourited
-- menu option, starting from the next cursor position, or the end if no such
-- option is found. this is meant for in-place favouriting from the favourites
-- menu.
function mt:insert_favourite_before_next_in_menu(id)
local menu = self:menu()
for i = menu.cursor+1, #menu.options do
local ind = self:favourited(menu.options[i].id)
if ind then
table.insert(self.favourites, ind, id)
return
end
end
self:add_favourite(id)
end
function menu_mt:set_cursor(pos, lines, opts)
local pos = math.max(1, math.min(pos, #self.options))
local top = self.view_top
if not lines then
top = pos
goto update
end
if opts and opts.centre then
top = pos - math.floor((lines - 1) / 2)
elseif opts and opts.keep_offset then
top = top + pos - self.cursor
end
-- move view to keep selected option visible
if pos < top then
top = pos
elseif pos > top + lines - 1 then
top = pos - lines + 1
end
top = math.max(1, math.min(top, #self.options - lines + 1))
::update::
if pos == self.cursor and top == self.view_top then
return false
end
self.cursor = pos
self.view_top = top
return true
end
function menu_mt:set_sort(bool, f)
if not self.sorted == not bool then
return
end
local key = self.type == 'search' and 'search_options' or 'options'
if bool then
self['orig_' .. key] = self[key]
self[key] = util.copy_table(self[key])
f(self[key])
else
self[key] = self['orig_' .. key]
self['orig_' .. key] = nil
end
if self.type == 'search' then
self:update_search_matches()
end
self.sorted = bool
end
function menu_mt:set_search_cursor(pos)
local pos = math.max(1, math.min(#self.search_text + 1, pos))
if pos == self.search_cursor then
return false
end
self.search_cursor = pos
return true
end
function menu_mt:set_search_text(str)
self.search_text = str
self:update_search_matches()
end
function menu_mt:update_search_matches()
if #self.search_text == 0 then
self.options = self.search_options
return
end
-- no utf8 :(
local case_sensitive = not not self.search_text:find('%u')
local options = {}
for _, v in ipairs(self.search_options) do
local matches = {}
local name = v.name
if not case_sensitive then
name = name:lower()
end
local i, j = 0, 0
while true do
i, j = name:find(self.search_text, j + 1, true)
if not i then
break
end
matches[#matches+1] = {start = i, stop = j}
end
if #matches > 0 then
local t = util.copy_table(v)
t.matches = matches
options[#options+1] = t
end
end
self.options = options
end
return state
|
