modernx.lua

-- mpv-osc-modern by maoiscat
-- email:valarmor@163.com
-- https://github.com/maoiscat/mpv-osc-modern

-- fork by cyl0
-- https://github.com/cyl0/ModernX

-- forked again by dexeonify
-- https://github.com/dexeonify/mpv-config/blob/main/scripts/modernx.lua

local assdraw = require 'mp.assdraw'
local msg = require 'mp.msg'
local opt = require 'mp.options'
local utils = require 'mp.utils'

--
-- Parameters
--
-- default user option values
-- do not touch, change them in osc.conf
local user_opts = {
    showwindowed = true,        -- show OSC when windowed?
    showfullscreen = true,      -- show OSC when fullscreen?
    idlescreen = true,          -- show mpv logo on idle
    scalewindowed = 1,          -- scaling of the controller when windowed
    scalefullscreen = 1,        -- scaling of the controller when fullscreen
    scaleforcedwindow = 1.5,    -- scaling when rendered on a forced window
    vidscale = true,            -- scale the controller with the video?
    barmargin = 0,              -- vertical margin of top/bottombar
    boxalpha = 80,              -- alpha of the background box,
                                -- 0 (opaque) to 255 (fully transparent)
    hidetimeout = 500,          -- duration in ms until the OSC hides if no
                                -- mouse movement. enforced non-negative for the
                                -- user, but internally negative is "always-on".
    fadeduration = 200,         -- duration of fade out in ms, 0 = no fade
    deadzonesize = 0.5,         -- size of deadzone
    minmousemove = 0,           -- minimum amount of pixels the mouse has to
                                -- move between ticks to make the OSC show up
    iamaprogrammer = false,     -- use native mpv values and disable OSC
                                -- internal track list management (and some
                                -- functions that depend on it)
    seekbarhandlesize = 0.6,    -- size ratio of the knob handle
    seekrangealpha = 64,        -- transparency of seekranges
    seekbarkeyframes = true,    -- use keyframes when dragging the seekbar
    title = "${media-title}",   -- string compatible with property-expansion
                                -- to be shown as OSC title
    tooltipborder = 1,          -- border of tooltip in bottom/topbar
    timetotal = false,          -- display total time instead of remaining time?
    timems = false,             -- display timecodes with milliseconds?
    tcspace = 100,              -- timecode spacing (compensate font size estimation)
    visibility = "auto",        -- only used at init to set visibility_mode(...)
    windowcontrols = "auto",    -- whether to show window controls
    windowcontrols_alignment = "right", -- which side to show window controls on
    greenandgrumpy = false,     -- disable santa hat
    livemarkers = true,         -- update seekbar chapter markers on duration change
    chapters_osd = true,        -- whether to show chapters OSD on next/prev
    playlist_osd = true,        -- whether to show playlist OSD on next/prev
    chapter_fmt = "Chapter: %s", -- chapter print format for seekbar-hover. "no" to disable
    unicodeminus = false,       -- whether to use the Unicode minus sign character

    showtitle = true,           -- show title in OSC
    showonpause = true,         -- show OSC on pause
    showonstart = true,         -- show OSC on startup or when the next file in
                                -- playlist starts playing
    showonseek = false,         -- show OSC when seeking
    movesub = true,             -- move subtitles when the OSC is visible
    volumebar = true,           -- show volume slider for ease of access
    volumecontrol = "linear",   -- use linear or logarithmic volume scale
    titlefont = "",             -- font used for the title above OSC and
                                -- in the window controls bar
    blur_intensity = 150,       -- adjust the strength of the OSC blur
    osc_color = "000000",       -- accent of the OSC and the title bar
    seekbarfg_color = "E39C42", -- color of the seekbar progress and handle
    seekbarbg_color = "FFFFFF", -- color of the remaining seekbar
                                -- both options apply to the volumebar too
    thumbpad = 4,               -- thumbnail border width
}

-- read options from config and command-line
opt.read_options(user_opts, "osc", function(list) update_options(list) end)

-------------------
-- thumbfast.lua --
-------------------

local thumbfast = {
    width = 0,
    height = 0,
    disabled = false,
    available = false
}

-----------------
-- modernx.lua --
-----------------

local osc_param = { -- calculated by osc_init()
    playresy = 0,                           -- canvas size Y
    playresx = 0,                           -- canvas size X
    display_aspect = 1,
    unscaled_y = 0,
    areas = {},
    video_margins = {
        l = 0, r = 0, t = 0, b = 0,         -- left/right/top/bottom
    },
}

local osc_styles = {
    transBg = "{\\blur100\\bord" .. user_opts.blur_intensity .. "\\1c&H000000&\\3c&H" .. user_opts.osc_color .. "&}",
    seekbarBg = "{\\blur0\\bord0\\1c&H" .. user_opts.seekbarbg_color .. "&}",
    seekbarFg = "{\\blur1\\bord1\\1c&H" .. user_opts.seekbarfg_color .. "&}",

    bigButtons = "{\\blur0\\bord0\\1c&HFFFFFF&\\3c&HFFFFFF&\\fs28\\fnmodernx-osc-icon}",
    mediumButtons = "{\\blur0\\bord0\\1c&HFFFFFF&\\3c&HFFFFFF&\\fs24\\fnmodernx-osc-icon}",
    smallButtons = "{\\blur0\\bord0\\1c&HFFFFFF&\\3c&HFFFFFF&\\fs24\\fnmodernx-osc-icon}",

    timecodes = "{\\blur0\\bord0\\1c&HFFFFFF&\\3c&H000000&\\fs22}",
    tooltip = "{\\blur1\\bord" .. user_opts.tooltipborder .. "\\1c&HFFFFFF&\\3c&H000000&\\fs20}",
    vidTitle = "{\\blur1\\bord0.5\\1c&HFFFFFF&\\3c&H0\\fs32\\q2\\fn" .. user_opts.titlefont .. "}",

    wcButtons = "{\\bord0\\1c&HFFFFFF&\\fs20\\fnmodernx-osc-icon}",
    wcTitle = "{\\1c&HFFFFFF&\\fs24\\q2\\fn" .. user_opts.titlefont .. "}",
    wcBar = "{\\1c&H" .. user_opts.osc_color .. "}",

    elementDown = "{\\1c&H999999&}",
    elementHover = "{\\blur5\\2c&HFFFFFF&}"
}

local osc_icons = {
    close = "\238\164\128",
    minimize = "\238\164\129",
    restore = "\238\164\130",
    maximize = "\238\164\131",

    volume_mute = "\238\164\132",
    volume_low = "\238\164\133",
    volume_med = "\238\164\134",
    volume_high = "\238\164\135",
    volume_loud = "\238\164\136",

    audio = "\238\164\137",
    subtitle = "\238\164\144",
    info = "\238\164\145",
    fullscreen_exit = "\238\164\146",
    fullscreen = "\238\164\147",

    playlist_prev = "\238\164\148",
    playlist_next = "\238\164\149",
    chapter_prev = "\238\164\150",
    chapter_next = "\238\164\151",
    play = "\238\164\152",
    pause = "\238\164\153",
    replay = "\238\164\160",
    skipback = "\238\164\161",
    skipforward = "\238\164\162",
}

-- internal states, do not touch
local state = {
    showtime,                               -- time of last invocation (last mouse move)
    osc_visible = false,
    anistart,                               -- time when the animation started
    anitype,                                -- current type of animation
    animation,                              -- current animation alpha
    mouse_down_counter = 0,                 -- used for softrepeat
    active_element = nil,                   -- nil = none, 0 = background, 1+ = see elements[]
    active_event_source = nil,              -- the "button" that issued the current event
    rightTC_trem = not user_opts.timetotal, -- if the right timecode should display total or remaining time
    tc_ms = user_opts.timems,               -- Should the timecodes display their time with milliseconds
    mp_screen_sizeX, mp_screen_sizeY,       -- last screen-resolution, to detect resolution changes to issue reINITs
    initREQ = false,                        -- is a re-init request pending?
    marginsREQ = false,                     -- is a margins update pending?
    last_mouseX, last_mouseY,               -- last mouse position, to detect significant mouse movement
    mouse_in_window = false,
    message_text,
    message_hide_timer,
    fullscreen = false,
    tick_timer = nil,
    tick_last_time = 0,                     -- when the last tick() was run
    hide_timer = nil,
    cache_state = nil,
    idle = false,
    enabled = true,
    input_enabled = true,
    showhide_enabled = false,
    windowcontrols_buttons = false,
    dmx_cache = 0,
    border = true,
    maximized = false,
    osd = mp.create_osd_overlay("ass-events"),
    chapter_list = {},                      -- sorted by time
    lastvisibility = user_opts.visibility,  -- save last visibility on pause if showonpause
    subpos = 100,                           -- last value of sub-pos set by the user
}

local window_control_box_width = 80
local tick_delay = 0.03

local is_december = os.date("*t").month == 12

--- Automatically disable OSC
local builtin_osc_enabled = mp.get_property_native("osc")
if builtin_osc_enabled then
    mp.set_property_native("osc", false)
end

--
-- Helperfunctions
--

function kill_animation()
    state.anistart = nil
    state.animation = nil
    state.anitype =  nil
end

function set_osd(res_x, res_y, text)
    if state.osd.res_x == res_x and
       state.osd.res_y == res_y and
       state.osd.data == text then
        return
    end
    state.osd.res_x = res_x
    state.osd.res_y = res_y
    state.osd.data = text
    state.osd.z = 1000
    state.osd:update()
end

-- scale factor for translating between real and virtual ASS coordinates
function get_virt_scale_factor()
    local w, h = mp.get_osd_size()
    if w <= 0 or h <= 0 then
        return 0, 0
    end
    return osc_param.playresx / w, osc_param.playresy / h
end

-- return mouse position in virtual ASS coordinates (playresx/y)
function get_virt_mouse_pos()
    if state.mouse_in_window then
        local sx, sy = get_virt_scale_factor()
        local x, y = mp.get_mouse_pos()
        return x * sx, y * sy
    else
        return -1, -1
    end
end

function set_virt_mouse_area(x0, y0, x1, y1, name)
    local sx, sy = get_virt_scale_factor()
    mp.set_mouse_area(x0 / sx, y0 / sy, x1 / sx, y1 / sy, name)
end

function scale_value(x0, x1, y0, y1, val)
    local m = (y1 - y0) / (x1 - x0)
    local b = y0 - (m * x0)
    return (m * val) + b
end

-- returns hitbox spanning coordinates (top left, bottom right corner)
-- according to alignment
function get_hitbox_coords(x, y, an, w, h)

    local alignments = {
      [1] = function () return x, y-h, x+w, y end,
      [2] = function () return x-(w/2), y-h, x+(w/2), y end,
      [3] = function () return x-w, y-h, x, y end,

      [4] = function () return x, y-(h/2), x+w, y+(h/2) end,
      [5] = function () return x-(w/2), y-(h/2), x+(w/2), y+(h/2) end,
      [6] = function () return x-w, y-(h/2), x, y+(h/2) end,

      [7] = function () return x, y, x+w, y+h end,
      [8] = function () return x-(w/2), y, x+(w/2), y+h end,
      [9] = function () return x-w, y, x, y+h end,
    }

    return alignments[an]()
end

function get_hitbox_coords_geo(geometry)
    return get_hitbox_coords(geometry.x, geometry.y, geometry.an,
        geometry.w, geometry.h)
end

function get_element_hitbox(element)
    return element.hitbox.x1, element.hitbox.y1,
        element.hitbox.x2, element.hitbox.y2
end

function mouse_hit(element)
    return mouse_hit_coords(get_element_hitbox(element))
end

function mouse_hit_coords(bX1, bY1, bX2, bY2)
    local mX, mY = get_virt_mouse_pos()
    return (mX >= bX1 and mX <= bX2 and mY >= bY1 and mY <= bY2)
end

function limit_range(min, max, val)
    if val > max then
        val = max
    elseif val < min then
        val = min
    end
    return val
end

-- translate value into element coordinates
function get_slider_ele_pos_for(element, val)

    local ele_pos = scale_value(
        element.slider.min.value, element.slider.max.value,
        element.slider.min.ele_pos, element.slider.max.ele_pos,
        val)

    return limit_range(
        element.slider.min.ele_pos, element.slider.max.ele_pos,
        ele_pos)
end

-- translates global (mouse) coordinates to value
function get_slider_value_at(element, glob_pos)

    local val = scale_value(
        element.slider.min.glob_pos, element.slider.max.glob_pos,
        element.slider.min.value, element.slider.max.value,
        glob_pos)

    return limit_range(
        element.slider.min.value, element.slider.max.value,
        val)
end

-- get value at current mouse position
function get_slider_value(element)
    return get_slider_value_at(element, get_virt_mouse_pos())
end

function countone(val)
    if not (user_opts.iamaprogrammer) then
        val = val + 1
    end
    return val
end

-- align:  -1 .. +1
-- frame:  size of the containing area
-- obj:    size of the object that should be positioned inside the area
-- margin: min. distance from object to frame (as long as -1 <= align <= +1)
function get_align(align, frame, obj, margin)
    return (frame / 2) + (((frame / 2) - margin - (obj / 2)) * align)
end

-- multiplies two alpha values, formular can probably be improved
function mult_alpha(alphaA, alphaB)
    return 255 - (((1-(alphaA/255)) * (1-(alphaB/255))) * 255)
end

function add_area(name, x1, y1, x2, y2)
    -- create area if needed
    if (osc_param.areas[name] == nil) then
        osc_param.areas[name] = {}
    end
    table.insert(osc_param.areas[name], {x1=x1, y1=y1, x2=x2, y2=y2})
end

function ass_append_alpha(ass, alpha, modifier)
    local ar = {}

    for ai, av in pairs(alpha) do
        av = mult_alpha(av, modifier)
        if state.animation then
            av = mult_alpha(av, state.animation)
        end
        ar[ai] = av
    end

    ass:append(string.format("{\\1a&H%X&\\2a&H%X&\\3a&H%X&\\4a&H%X&}",
               ar[1], ar[2], ar[3], ar[4]))
end

function ass_draw_cir_cw(ass, x, y, r)
    ass:round_rect_cw(x-r, y-r, x+r, y+r, r)
end

function ass_draw_rr_h_cw(ass, x0, y0, x1, y1, r1, hexagon, r2)
    if hexagon then
        ass:hexagon_cw(x0, y0, x1, y1, r1, r2)
    else
        ass:round_rect_cw(x0, y0, x1, y1, r1, r2)
    end
end

function ass_draw_rr_h_ccw(ass, x0, y0, x1, y1, r1, hexagon, r2)
    if hexagon then
        ass:hexagon_ccw(x0, y0, x1, y1, r1, r2)
    else
        ass:round_rect_ccw(x0, y0, x1, y1, r1, r2)
    end
end

function round(number, decimals)
    local power = 10^(decimals or 1)
    return math.floor(number * power + 0.5) / power
end


--
-- Tracklist Management
--

local nicetypes = {video = "Video", audio = "Audio", sub = "Subtitle"}

-- updates the OSC internal playlists, should be run each time the track-layout changes
function update_tracklist()
    local tracktable = mp.get_property_native("track-list", {})

    -- by osc_id
    tracks_osc = {}
    tracks_osc.video, tracks_osc.audio, tracks_osc.sub = {}, {}, {}
    -- by mpv_id
    tracks_mpv = {}
    tracks_mpv.video, tracks_mpv.audio, tracks_mpv.sub = {}, {}, {}
    for n = 1, #tracktable do
        if not (tracktable[n].type == "unknown") then
            local type = tracktable[n].type
            local mpv_id = tonumber(tracktable[n].id)

            -- by osc_id
            table.insert(tracks_osc[type], tracktable[n])

            -- by mpv_id
            tracks_mpv[type][mpv_id] = tracktable[n]
            tracks_mpv[type][mpv_id].osc_id = #tracks_osc[type]
        end
    end
end

-- return a nice list of tracks of the given type (video, audio, sub)
function get_tracklist(type)
    local msg = "Available " .. nicetypes[type] .. " Tracks: "
    if not tracks_osc or #tracks_osc[type] == 0 then
        msg = msg .. "none"
    else
        for n = 1, #tracks_osc[type] do
            local track = tracks_osc[type][n]
            local lang, title, selected = "unknown", "", "○"
            if not(track.lang == nil) then lang = track.lang end
            if not(track.title == nil) then title = track.title end
            if (track.id == tonumber(mp.get_property(type))) then
                selected = "●"
            end
            msg = msg.."\n"..selected.." "..n..": ["..lang.."] "..title
        end
    end
    return msg
end

-- relatively change the track of given <type> by <next> tracks
    --(+1 -> next, -1 -> previous)
function set_track(type, next)
    local current_track_mpv, current_track_osc
    if (mp.get_property(type) == "no") then
        current_track_osc = 0
    else
        current_track_mpv = tonumber(mp.get_property(type))
        current_track_osc = tracks_mpv[type][current_track_mpv].osc_id
    end
    local new_track_osc = (current_track_osc + next) % (#tracks_osc[type] + 1)
    local new_track_mpv
    if new_track_osc == 0 then
        new_track_mpv = "no"
    else
        new_track_mpv = tracks_osc[type][new_track_osc].id
    end

    mp.commandv("set", type, new_track_mpv)

    if (new_track_osc == 0) then
        show_message(nicetypes[type] .. " Track: none")
    else
        show_message(nicetypes[type]  .. " Track: "
            .. new_track_osc .. "/" .. #tracks_osc[type]
            .. " [".. (tracks_osc[type][new_track_osc].lang or "unknown") .."] "
            .. (tracks_osc[type][new_track_osc].title or ""))
    end
end

-- get the currently selected track of <type>, OSC-style counted
function get_track(type)
    local track = mp.get_property(type)
    if track ~= "no" and track ~= nil then
        local tr = tracks_mpv[type][tonumber(track)]
        if tr then
            return tr.osc_id
        end
    end
    return 0
end


-- convert slider_pos to logarithmic depending on volumecontrol user_opts
function set_volume(slider_pos)
    local volume = slider_pos
    if user_opts.volumecontrol == "log" then
        volume = slider_pos^2 / 100
    end
    return math.floor(volume)
end

-- WindowControl helpers
function window_controls_enabled()
    val = user_opts.windowcontrols
    if val == "auto" then
        return not state.border
    else
        return val ~= "no"
    end
end

function window_controls_alignment()
    return user_opts.windowcontrols_alignment
end

--
-- Element Management
--

local elements = {}

function prepare_elements()

    -- remove elements without layout or invisble
    local elements2 = {}
    for n, element in pairs(elements) do
        if not (element.layout == nil) and (element.visible) then
            table.insert(elements2, element)
        end
    end
    elements = elements2

    function elem_compare (a, b)
        return a.layout.layer < b.layout.layer
    end

    table.sort(elements, elem_compare)


    for _,element in pairs(elements) do

        local elem_geo = element.layout.geometry

        -- Calculate the hitbox
        local bX1, bY1, bX2, bY2 = get_hitbox_coords_geo(elem_geo)
        element.hitbox = {x1 = bX1, y1 = bY1, x2 = bX2, y2 = bY2}

        local style_ass = assdraw.ass_new()

        -- prepare static elements
        style_ass:append("{}") -- hack to troll new_event into inserting a \n
        style_ass:new_event()
        style_ass:pos(elem_geo.x, elem_geo.y)
        style_ass:an(elem_geo.an)
        style_ass:append(element.layout.style)

        element.style_ass = style_ass

        local static_ass = assdraw.ass_new()


        if (element.type == "box") then
            --draw box
            static_ass:draw_start()
            ass_draw_rr_h_cw(static_ass, 0, 0, elem_geo.w, elem_geo.h,
                             element.layout.box.radius, element.layout.box.hexagon)
            static_ass:draw_stop()

        elseif (element.type == "slider") then
            --draw static slider parts
            local slider_lo = element.layout.slider
            -- calculate positions of min and max points
            element.slider.min.ele_pos = user_opts.seekbarhandlesize * elem_geo.h / 2
            element.slider.max.ele_pos = elem_geo.w - element.slider.min.ele_pos
            element.slider.min.glob_pos = element.hitbox.x1 + element.slider.min.ele_pos
            element.slider.max.glob_pos = element.hitbox.x1 + element.slider.max.ele_pos

            static_ass:draw_start()
            -- a hack which prepares the whole slider area to allow center placements such like an=5
            static_ass:rect_cw(0, 0, elem_geo.w, elem_geo.h)
            static_ass:rect_ccw(0, 0, elem_geo.w, elem_geo.h)
            -- marker nibbles
            if not (element.slider.markerF == nil) and (slider_lo.gap > 0) then
                local markers = element.slider.markerF()
                for _,marker in pairs(markers) do
                    if (marker >= element.slider.min.value) and
                        (marker <= element.slider.max.value) then

                        local s = get_slider_ele_pos_for(element, marker)

                        if (slider_lo.gap > 5) then -- draw triangles

                            --top
                            if (slider_lo.nibbles_top) then
                                static_ass:move_to(s - 3, slider_lo.gap - 5)
                                static_ass:line_to(s + 3, slider_lo.gap - 5)
                                static_ass:line_to(s, slider_lo.gap - 1)
                            end

                            --bottom
                            if (slider_lo.nibbles_bottom) then
                                static_ass:move_to(s - 3,
                                    elem_geo.h - slider_lo.gap + 5)
                                static_ass:line_to(s,
                                    elem_geo.h - slider_lo.gap + 1)
                                static_ass:line_to(s + 3,
                                    elem_geo.h - slider_lo.gap + 5)
                            end

                        else -- draw 2x1px nibbles

                            --top
                            if (slider_lo.nibbles_top) then
                                static_ass:rect_cw(s - 1, 0, s + 1, slider_lo.gap);
                            end

                            --bottom
                            if (slider_lo.nibbles_bottom) then
                                static_ass:rect_cw(s - 1,
                                    elem_geo.h - slider_lo.gap,
                                    s + 1, elem_geo.h);
                            end
                        end
                    end
                end
            end
        end

        element.static_ass = static_ass


        -- if the element is supposed to be disabled,
        -- style it accordingly and kill the eventresponders
        if not (element.enabled) then
            element.layout.alpha[1] = 136
            element.eventresponder = nil
        end

        -- gray out the element if it is toggled off
        if (element.inactive) then
            element.layout.alpha[1] = 136
        end
    end
end


--
-- Element Rendering
--

-- returns nil or a chapter element from the native property chapter-list
function get_chapter(possec)
    local cl = state.chapter_list  -- sorted, get latest before possec, if any

    for n=#cl,1,-1 do
        if possec >= cl[n].time then
            return cl[n]
        end
    end
end

function observe_subpos(visible, pos)
    if not visible then
        mp.observe_property("sub-pos", "number", observe_subpos)
    elseif visible == "sub-pos" then
        state.subpos = pos
    else
        mp.unobserve_property(observe_subpos)
    end
end

function update_subpos(is_visible)
    -- source: https://github.com/Zren/mpv-osc-tethys/commit/5173241
    local max_subpos = 78  -- as the starting point for decrementing
    local osc_height = math.max(150, user_opts.blur_intensity)
    local new_subpos = max_subpos - (osc_height - 150) / 12.5

    if (state.subpos > new_subpos) then
        local final_pos = is_visible and new_subpos or state.subpos
        mp.set_property_number("sub-pos", round(final_pos, 0))
    end
end

function render_elements(master_ass)

    -- when the slider is dragged or hovered and we have a target chapter name
    -- then we use it instead of the normal title. we calculate it before the
    -- render iterations because the title may be rendered before the slider.
    state.forced_title = nil
    local se, ae = state.slider_element, elements[state.active_element]

    -- disable displaying chapter name in title when thumbfast is available
    -- because thumbfast will render it above the thumbnail instead
    if thumbfast.disabled then
        local se, ae = state.slider_element, elements[state.active_element]
        if user_opts.chapter_fmt ~= "no" and se and (ae == se or (not ae and mouse_hit(se))) then
            local dur = mp.get_property_number("duration", 0)
            if dur > 0 then
                local possec = get_slider_value(se) * dur / 100 -- of mouse pos
                local ch = get_chapter(possec)
                if ch and ch.title and ch.title ~= "" then
                    state.forced_title = string.format(user_opts.chapter_fmt, ch.title)
                end
            end
        end
    end

    for n=1, #elements do
        local element = elements[n]

        local style_ass = assdraw.ass_new()
        style_ass:merge(element.style_ass)
        ass_append_alpha(style_ass, element.layout.alpha, 0)

        if element.eventresponder and (state.active_element == n) then

            -- run render event functions
            if not (element.eventresponder.render == nil) then
                element.eventresponder.render(element)
            end

            if mouse_hit(element) then
                -- mouse down styling
                if (element.styledown) then
                    style_ass:append(osc_styles.elementDown)
                end

                if (element.softrepeat) and (state.mouse_down_counter >= 15
                    and state.mouse_down_counter % 5 == 0) then

                    element.eventresponder[state.active_event_source.."_down"](element)
                end
                state.mouse_down_counter = state.mouse_down_counter + 1
            end

        end

        local elem_ass = assdraw.ass_new()

        elem_ass:merge(style_ass)

        if not (element.type == "button") then
            elem_ass:merge(element.static_ass)
        end

        if (element.type == "slider") then

            local slider_lo = element.layout.slider
            local elem_geo = element.layout.geometry
            local s_min = element.slider.min.value
            local s_max = element.slider.max.value

            -- draw pos marker
            local pos = element.slider.posF()
            local seekRanges = element.slider.seekRangesF()
            local rh = user_opts.seekbarhandlesize * elem_geo.h / 2 -- Handle radius
            local xp

            if pos then
                xp = get_slider_ele_pos_for(element, pos)
                ass_draw_cir_cw(elem_ass, xp, elem_geo.h/2, rh)
                elem_ass:rect_cw(0, slider_lo.gap, xp, elem_geo.h - slider_lo.gap)
            end

            if seekRanges then
                elem_ass:draw_stop()
                elem_ass:merge(element.style_ass)
                ass_append_alpha(elem_ass, element.layout.alpha, user_opts.seekrangealpha)
                elem_ass:merge(element.static_ass)

                for _,range in pairs(seekRanges) do
                    local pstart = get_slider_ele_pos_for(element, range["start"])
                    local pend = get_slider_ele_pos_for(element, range["end"])
                    elem_ass:rect_cw(pstart - rh, slider_lo.gap, pend + rh, elem_geo.h - slider_lo.gap)
                end
            end

            elem_ass:draw_stop()

            -- add tooltip
            if not (element.slider.tooltipF == nil) and element.enabled then

                if mouse_hit(element) then
                    local sliderpos = get_slider_value(element)
                    local tooltiplabel = element.slider.tooltipF(sliderpos)

                    local an = slider_lo.tooltip_an

                    local ty

                    if (an == 2) then
                        ty = element.hitbox.y1
                    else
                        ty = element.hitbox.y1 + elem_geo.h/2
                    end

                    local tx = get_virt_mouse_pos()
                    if (slider_lo.adjust_tooltip) then
                        if (an == 2) then
                            if (sliderpos < (s_min + 3)) then
                                an = an - 1
                            elseif (sliderpos > (s_max - 3)) then
                                an = an + 1
                            end
                        elseif (sliderpos > (s_max-s_min)/2) then
                            an = an + 1
                            tx = tx - 5
                        else
                            an = an - 1
                            tx = tx + 10
                        end
                    end

                    -- tooltip label
                    elem_ass:new_event()
                    elem_ass:pos(tx, ty)
                    elem_ass:an(an)
                    elem_ass:append(slider_lo.tooltip_style)
                    ass_append_alpha(elem_ass, slider_lo.alpha, 0)
                    elem_ass:append(tooltiplabel)

                    -- thumbfast
                    if element.thumbnailable and not thumbfast.disabled then
                        local osd_w = mp.get_property_number("osd-width")
                        local r_w, r_h = get_virt_scale_factor()

                        local hover_sec = mp.get_property_number("duration") * sliderpos / 100
                        local tooltip_font_size = 20
                        local thumbPad = user_opts.thumbpad
                        local thumbMarginX = 25 / r_w
                        local thumbMarginY = tooltip_font_size + thumbPad + 4 / r_h
                        local thumbX = math.min(osd_w - thumbfast.width - thumbMarginX, math.max(thumbMarginX, tx / r_w - thumbfast.width / 2))
                        local thumbY = (ty - thumbMarginY) / r_h - thumbfast.height

                        thumbX = math.floor(thumbX + 0.5)
                        thumbY = math.floor(thumbY + 0.5)

                        elem_ass:new_event()
                        elem_ass:pos(thumbX * r_w, ty - thumbMarginY - thumbfast.height * r_h)
                        elem_ass:append(osc_styles.tooltip)
                        elem_ass:draw_start()
                        elem_ass:rect_cw(-thumbPad * r_w, -thumbPad * r_h, (thumbfast.width + thumbPad) * r_w, (thumbfast.height + thumbPad) * r_h)
                        elem_ass:draw_stop()

                        mp.commandv("script-message-to", "thumbfast", "thumb",
                            hover_sec, thumbX, thumbY)

                        -- chapter title
                        local se, ae = state.slider_element, elements[state.active_element]
                        if user_opts.chapter_fmt ~= "no" and se and (ae == se or (not ae and mouse_hit(se))) then
                            local dur = mp.get_property_number("duration", 0)
                            if dur > 0 then
                                local possec = get_slider_value(se) * dur / 100 -- of mouse pos
                                local ch = get_chapter(possec)
                                if ch and ch.title and ch.title ~= "" then
                                    elem_ass:new_event()
                                    elem_ass:pos((thumbX + thumbfast.width / 2) * r_w, thumbY * r_h - tooltip_font_size)
                                    elem_ass:an(an)
                                    elem_ass:append(slider_lo.tooltip_style)
                                    ass_append_alpha(elem_ass, slider_lo.alpha, 0)
                                    elem_ass:append(string.format(user_opts.chapter_fmt, ch.title))
                                end
                            end
                        end
                    end
                elseif element.thumbnailable and thumbfast.available then
                    mp.commandv("script-message-to", "thumbfast", "clear")
                end
            end

        elseif (element.type == "button") then

            local buttontext
            if type(element.content) == "function" then
                buttontext = element.content() -- function objects
            elseif not (element.content == nil) then
                buttontext = element.content -- text objects
            end

            local maxchars = element.layout.button.maxchars
            if not (maxchars == nil) and (#buttontext > maxchars) then
                local max_ratio = 1.25  -- up to 25% more chars while shrinking
                local limit = math.max(0, math.floor(maxchars * max_ratio) - 3)
                if (#buttontext > limit) then
                    while (#buttontext > limit) do
                        buttontext = buttontext:gsub(".[\128-\191]*$", "")
                    end
                    buttontext = buttontext .. "..."
                end
                local _, nchars2 = buttontext:gsub(".[\128-\191]*", "")
                local stretch = (maxchars/#buttontext)*100
                buttontext = string.format("{\\fscx%f}",
                    (maxchars/#buttontext)*100) .. buttontext
            end

            elem_ass:append(buttontext)

            -- add tooltip for audio and subtitle tracks
            if not (element.tooltipF == nil) and element.enabled then
                if mouse_hit(element) then
                    local tooltiplabel = element.tooltipF
                    local an = 1
                    local ty = element.hitbox.y1
                    local tx = get_virt_mouse_pos()

                    if ty < osc_param.playresy / 2 then
                        ty = element.hitbox.y2
                        an = 7
                    end

                    -- tooltip label
                    if type(element.tooltipF) == "function" then
                        tooltiplabel = element.tooltipF()
                    else
                        tooltiplabel = element.tooltipF
                    end
                    elem_ass:new_event()
                    elem_ass:pos(tx, ty)
                    elem_ass:an(an)
                    elem_ass:append(element.tooltip_style)
                    elem_ass:append(tooltiplabel)
                end
            end

            -- add hover effect
            -- source: https://github.com/Zren/mpvz/issues/13
            local button_lo = element.layout.button
            local is_clickable = element.eventresponder and (
                element.eventresponder["mbtn_left_down"] ~= nil or
                element.eventresponder["mbtn_left_up"] ~= nil
            )
            if mouse_hit(element) and is_clickable and element.enabled then
                local shadow_ass = assdraw.ass_new()
                shadow_ass:merge(style_ass)
                shadow_ass:append(button_lo.hoverstyle .. buttontext)
                elem_ass:merge(shadow_ass)
            end
        end

        master_ass:merge(elem_ass)
    end
end

--
-- Message display
--

-- pos is 1 based
function limited_list(prop, pos)
    local proplist = mp.get_property_native(prop, {})
    local count = #proplist
    if count == 0 then
        return count, proplist
    end

    local fs = tonumber(mp.get_property('options/osd-font-size'))
    local max = math.ceil(osc_param.unscaled_y*0.75 / fs)
    if max % 2 == 0 then
        max = max - 1
    end
    local delta = math.ceil(max / 2) - 1
    local begi = math.max(math.min(pos - delta, count - max + 1), 1)
    local endi = math.min(begi + max - 1, count)

    local reslist = {}
    for i=begi, endi do
        local item = proplist[i]
        item.current = (i == pos) and true or nil
        table.insert(reslist, item)
    end
    return count, reslist
end

function get_playlist()
    local pos = mp.get_property_number('playlist-pos', 0) + 1
    local count, limlist = limited_list('playlist', pos)
    if count == 0 then
        return 'Empty playlist.'
    end

    local message = string.format('Playlist [%d/%d]:\n', pos, count)
    for i, v in ipairs(limlist) do
        local title = v.title
        local _, filename = utils.split_path(v.filename)
        if title == nil then
            title = filename
        end
        message = string.format('%s %s %s\n', message,
            (v.current and '●' or '○'), title)
    end
    return message
end

function get_chapterlist()
    local pos = mp.get_property_number('chapter', 0) + 1
    local count, limlist = limited_list('chapter-list', pos)
    if count == 0 then
        return 'No chapters.'
    end

    local message = string.format('Chapters [%d/%d]:\n', pos, count)
    for i, v in ipairs(limlist) do
        local time = mp.format_time(v.time)
        local title = v.title
        if title == nil then
            title = string.format('Chapter %02d', i)
        end
        message = string.format('%s[%s] %s %s\n', message, time,
            (v.current and '●' or '○'), title)
    end
    return message
end

function show_message(text, duration)

    --print("text: "..text.."   duration: " .. duration)
    if duration == nil then
        duration = tonumber(mp.get_property("options/osd-duration")) / 1000
    elseif not type(duration) == "number" then
        print("duration: " .. duration)
    end

    -- cut the text short, otherwise the following functions
    -- may slow down massively on huge input
    text = string.sub(text, 0, 4000)

    -- replace actual linebreaks with ASS linebreaks
    text = string.gsub(text, "\n", "\\N")

    state.message_text = text

    if not state.message_hide_timer then
        state.message_hide_timer = mp.add_timeout(0, request_tick)
    end
    state.message_hide_timer:kill()
    state.message_hide_timer.timeout = duration
    state.message_hide_timer:resume()
    request_tick()
end

function render_message(ass)
    if state.message_hide_timer and state.message_hide_timer:is_enabled() and
       state.message_text
    then
        local _, lines = string.gsub(state.message_text, "\\N", "")

        local fontsize = tonumber(mp.get_property("options/osd-font-size"))
        local outline = tonumber(mp.get_property("options/osd-border-size"))
        local maxlines = math.ceil(osc_param.unscaled_y*0.75 / fontsize)
        local counterscale = osc_param.playresy / osc_param.unscaled_y

        fontsize = fontsize * counterscale / math.max(0.65 + math.min(lines/maxlines, 1), 1)
        outline = outline * counterscale / math.max(0.75 + math.min(lines/maxlines, 1)/2, 1)

        local style = "{\\bord" .. outline .. "\\fs" .. fontsize .. "}"


        ass:new_event()
        ass:append(style .. state.message_text)
    else
        state.message_text = nil
    end
end

--
-- Initialisation and Layout
--

function new_element(name, type)
    elements[name] = {}
    elements[name].type = type

    -- add default stuff
    elements[name].eventresponder = {}
    elements[name].visible = true
    elements[name].enabled = true
    elements[name].softrepeat = false
    elements[name].styledown = (type == "button")
    elements[name].state = {}

    if (type == "slider") then
        elements[name].slider = {min = {value = 0}, max = {value = 100}}
        elements[name].thumbnailable = false
    end

    return elements[name]
end

function add_layout(name)
    if not (elements[name] == nil) then
        -- new layout
        elements[name].layout = {}

        -- set layout defaults
        elements[name].layout.layer = 50
        elements[name].layout.alpha = {[1] = 0, [2] = 255, [3] = 255, [4] = 255}

        if (elements[name].type == "button") then
            elements[name].layout.button = {
                maxchars = nil,
                hoverstyle = osc_styles.elementHover,
            }
        elseif (elements[name].type == "slider") then
            -- slider defaults
            elements[name].layout.slider = {
                border = 1,
                gap = 1,
                nibbles_top = true,
                nibbles_bottom = true,
                adjust_tooltip = true,
                tooltip_style = "",
                tooltip_an = 2,
                alpha = {[1] = 0, [2] = 255, [3] = 88, [4] = 255},
            }
        elseif (elements[name].type == "box") then
            elements[name].layout.box = {radius = 0, hexagon = false}
        end

        return elements[name].layout
    else
        msg.error("Can't add_layout to element \""..name.."\", doesn't exist.")
    end
end

-- Window Controls
function window_controls()
    local wc_geo = {
        x = 0,
        y = 30 + user_opts.barmargin,
        an = 1,
        w = osc_param.playresx,
        h = 30,
    }

    local alignment = window_controls_alignment()
    local controlbox_w = window_control_box_width
    local titlebox_w = wc_geo.w - controlbox_w

    -- Default alignment is "right"
    local controlbox_left = wc_geo.w - controlbox_w
    local titlebox_left = wc_geo.x
    local titlebox_right = wc_geo.w - controlbox_w

    if alignment == "left" then
        controlbox_left = wc_geo.x + 10
        titlebox_left = wc_geo.x + controlbox_w + 10
        titlebox_right = wc_geo.w
    end

    add_area("window-controls",
             get_hitbox_coords(controlbox_left, wc_geo.y, wc_geo.an,
                               controlbox_w, wc_geo.h))

    local lo

    -- Background Bar
    new_element("wcbar", "box")
    lo = add_layout("wcbar")
    lo.geometry = wc_geo
    lo.layer = 10
    lo.style = osc_styles.wcBar
    lo.alpha[1] = user_opts.boxalpha

    local button_y = wc_geo.y - (wc_geo.h / 2)
    local first_geo =
        {x = controlbox_left - 5, y = button_y, an = 4, w = 30, h = 30}
    local second_geo =
        {x = controlbox_left + 25, y = button_y, an = 4, w = 30, h = 30}
    local third_geo =
        {x = controlbox_left + 55, y = button_y, an = 4, w = 30, h = 30}

    -- Window control buttons use symbols in the custom mpv osd font
    -- because the official unicode codepoints are sufficiently
    -- exotic that a system might lack an installed font with them,
    -- and libass will complain that they are not present in the
    -- default font, even if another font with them is available.

    -- Close: 🗙
    ne = new_element("close", "button")
    ne.content = osc_icons.close
    ne.eventresponder["mbtn_left_up"] =
        function () mp.commandv("quit") end
    lo = add_layout("close")
    lo.geometry = alignment == "left" and first_geo or third_geo
    lo.style = osc_styles.wcButtons
    lo.button.hoverstyle = "{\\c&H2311E8&}"

    -- Minimize: 🗕
    ne = new_element("minimize", "button")
    ne.content = osc_icons.minimize
    ne.eventresponder["mbtn_left_up"] =
        function () mp.commandv("cycle", "window-minimized") end
    lo = add_layout("minimize")
    lo.geometry = alignment == "left" and second_geo or first_geo
    lo.style = osc_styles.wcButtons

    -- Maximize: 🗖 /🗗
    ne = new_element("maximize", "button")
    if state.maximized or state.fullscreen then
        ne.content = osc_icons.restore
    else
        ne.content = osc_icons.maximize
    end
    ne.eventresponder["mbtn_left_up"] =
        function ()
            if state.fullscreen then
                mp.commandv("cycle", "fullscreen")
            else
                mp.commandv("cycle", "window-maximized")
            end
        end
    lo = add_layout("maximize")
    lo.geometry = alignment == "left" and third_geo or second_geo
    lo.style = osc_styles.wcButtons

    -- deadzone below window controls
    local sh_area_y0, sh_area_y1
    sh_area_y0 = user_opts.barmargin
    sh_area_y1 = (wc_geo.y + (wc_geo.h / 2)) +
                 get_align(1 - (2 * user_opts.deadzonesize),
                 osc_param.playresy - (wc_geo.y + (wc_geo.h / 2)), 0, 0)
    add_area("showhide_wc", wc_geo.x, sh_area_y0, wc_geo.w, sh_area_y1)

    -- Window Title
    ne = new_element("wctitle", "button")
    ne.content = function ()
        local title = mp.command_native({"expand-text", user_opts.title})
        -- escape ASS, and strip newlines and trailing slashes
        title = title:gsub("\\n", " "):gsub("\\$", ""):gsub("{","\\{")
        return not (title == "") and title or "mpv"
    end
    local left_pad = 5
    local right_pad = 10
    lo = add_layout("wctitle")
    lo.geometry =
        { x = titlebox_left + left_pad, y = wc_geo.y - 3, an = 1,
          w = titlebox_w, h = wc_geo.h }
    lo.style = string.format("%s{\\clip(%f,%f,%f,%f)}",
        osc_styles.wcTitle,
        titlebox_left + left_pad, wc_geo.y - wc_geo.h,
        titlebox_right - right_pad, wc_geo.y + wc_geo.h)

    add_area("window-controls-title",
             titlebox_left, 0, titlebox_right, wc_geo.h)
end

--
-- Modernx Layout
--

function layout()
    local osc_geo = {
        w = osc_param.playresx,
        h = 180
    }

    -- update bottom margin
    osc_param.video_margins.b =
        math.max(180, user_opts.blur_intensity) / osc_param.playresy

    -- origin of the controllers, bottom left corner
    local posX = 0
    local posY = osc_param.playresy

    -- alignment
    local refX = osc_geo.w / 2
    local refY = posY

    -- adjust timecode width based on whether milliseconds are visible
    local tcW = (state.tc_ms) and 100 or 64
    if user_opts.tcspace >= 50 and user_opts.tcspace <= 200 then
        -- adjust our hardcoded font size estimation
        tcW = tcW * user_opts.tcspace / 100
    end

    -- padding to decrease when player window is tall or small
    local min = round(osc_param.display_aspect) <= 0.6
    local pad = min and -10 or 0

    -- condition to determine whether volume bar is visible
    -- if volume bar is hidden, reposition cy_audio and cy_sub
    volbar_cond = user_opts.volumebar and round(osc_param.display_aspect) > 1.3

    osc_param.areas = {} -- delete areas

    -- area for active mouse input
    add_area("input", get_hitbox_coords(posX, posY, 1, osc_geo.w, osc_geo.h))

    -- deadzone above OSC
    local sh_area_y0, sh_area_y1
    sh_area_y0 = get_align(-1 + (2*user_opts.deadzonesize),
                           posY - osc_geo.h, 0, 0)
    sh_area_y1 = osc_param.playresy - user_opts.barmargin

    -- area for show/hide
    add_area("showhide", 0, sh_area_y0, osc_param.playresx, sh_area_y1)

    local lo, geo

    -- Controller Background
    new_element("transBg", "box")
    lo = add_layout("transBg")
    lo.geometry = {x = posX, y = posY, an = 7, w = osc_geo.w, h = 1}
    lo.style = osc_styles.transBg
    lo.layer = 10
    lo.alpha[3] = 0

    -- Seekbar
    new_element("bgBar", "box")
    lo = add_layout("bgBar")
    lo.geometry = {x = refX, y = refY - 100, an = 5, w = osc_geo.w - 50, h = 2}
    lo.style = osc_styles.seekbarBg
    lo.layer = 13
    lo.alpha[1] = 128
    lo.alpha[3] = 128

    lo = add_layout("seekbar")
    lo.geometry = {x = refX, y = refY - 100, an = 5, w = osc_geo.w - 50, h = 16}
    lo.style = osc_styles.seekbarFg
    lo.slider.gap = 7
    lo.slider.tooltip_style = osc_styles.tooltip
    lo.slider.tooltip_an = 2

    -- Title
    geo = {x = 25, y = refY - 132, an = 1, w = osc_geo.w - 50, h = 35}
    lo = add_layout("title")
    lo.geometry = geo
    lo.style = string.format("%s{\\clip(0,%f,%f,%f)}", osc_styles.vidTitle,
                             geo.y - geo.h, geo.x + geo.w, geo.y + geo.h)
    lo.alpha[3] = 0

    -- Playback control buttons
    lo = add_layout("pl_prev")
    lo.geometry = {x = refX - 180, y = refY - 40, an = 5, w = 30, h = 24}
    lo.style = osc_styles.mediumButtons

    lo = add_layout("ch_prev")
    lo.geometry = {x = refX - 120, y = refY - 40, an = 5, w = 30, h = 24}
    lo.style = osc_styles.mediumButtons

    lo = add_layout("skipback")
    lo.geometry = {x = refX - 60 - pad, y = refY - 40, an = 5, w = 30, h = 24}
    lo.style = osc_styles.mediumButtons

    lo = add_layout("playpause")
    lo.geometry = {x = refX, y = refY - 40, an = 5, w = 45, h = 45}
    lo.style = osc_styles.bigButtons

    lo = add_layout("skipfrwd")
    lo.geometry = {x = refX + 60 + pad, y = refY - 40, an = 5, w = 30, h = 24}
    lo.style = osc_styles.mediumButtons

    lo = add_layout("ch_next")
    lo.geometry = {x = refX + 120, y = refY - 40, an = 5, w = 30, h = 24}
    lo.style = osc_styles.mediumButtons

    lo = add_layout("pl_next")
    lo.geometry = {x = refX + 180, y = refY - 40, an = 5, w = 30, h = 24}
    lo.style = osc_styles.mediumButtons

    -- Timecode
    lo = add_layout("tc_left")
    lo.geometry = {x = 25, y = refY - 90, an = 7, w = tcW, h = 20}
    lo.style = osc_styles.timecodes

    lo = add_layout("tc_right")
    lo.geometry = {x = osc_geo.w - 25, y = refY - 90, an = 9, w = tcW, h = 20}
    lo.style = osc_styles.timecodes

    -- Volume
    lo = add_layout("volume")
    lo.geometry = {x = 37, y = refY - 40, an = 5, w = 24, h = 24}
    lo.style = osc_styles.smallButtons

    if min then lo.geometry.x = osc_geo.w - 87 - pad end

    -- Volumebar
    lo = new_element("volumebarBg", "box")
    lo.visible = volbar_cond

    lo = add_layout("volumebarBg")
    lo.geometry = {x = 67, y = refY - 40, an = 4, w = 80, h = 2}
    lo.style = osc_styles.seekbarBg
    lo.alpha[1] = 128
    lo.layer = 13

    lo = add_layout("volumebar")
    lo.geometry = {x = 67, y = refY - 40, an = 4, w = 80, h = 8}
    lo.style = (#tracks_osc.audio > 0) and osc_styles.seekbarFg
               or osc_styles.seekbarBg
    lo.slider.gap = 3
    lo.slider.tooltip_style = osc_styles.tooltip
    lo.slider.tooltip_an = 2

    -- Audio tracks
    lo = add_layout("cy_audio")
    lo.geometry = {x = 177, y = refY - 40, an = 5, w = 24, h = 24}
    lo.style = osc_styles.smallButtons

    if not volbar_cond then lo.geometry.x = 87 end
    if min then lo.geometry.x = 37 end

    -- Subtitle tracks
    lo = add_layout("cy_sub")
    lo.geometry = {x = 217, y = refY - 40, an = 5, w = 24, h = 24}
    lo.style = osc_styles.smallButtons

    if not volbar_cond then lo.geometry.x = 137 end
    if min then lo.geometry.x = 87 + pad end

    -- Cache
    lo = add_layout("cache")
    lo.geometry = {x = osc_geo.w - 187, y = refY - 40, an = 5, w = 64, h = 20}
    lo.style = osc_styles.timecodes

    -- Toggle info
    lo = add_layout("tog_info")
    lo.geometry = {x = osc_geo.w - 87, y = refY - 40, an = 5, w = 24, h = 24}
    lo.style = osc_styles.smallButtons

    -- Toggle fullscreen
    lo = add_layout("tog_fs")
    lo.geometry = {x = osc_geo.w - 37, y = refY - 40, an = 5, w = 24, h = 24}
    lo.style = osc_styles.smallButtons
end

-- Validate string type user options
function validate_user_opts()
    if user_opts.windowcontrols ~= "auto" and
       user_opts.windowcontrols ~= "yes" and
       user_opts.windowcontrols ~= "no" then
        msg.warn("windowcontrols cannot be \"" ..
                user_opts.windowcontrols .. "\". Ignoring.")
        user_opts.windowcontrols = "auto"
    end

    if user_opts.windowcontrols_alignment ~= "right" and
       user_opts.windowcontrols_alignment ~= "left" then
        msg.warn("windowcontrols_alignment cannot be \"" ..
                user_opts.windowcontrols_alignment .. "\". Ignoring.")
        user_opts.windowcontrols_alignment = "right"
    end

    if user_opts.volumecontrol ~= "linear" and
       user_opts.volumecontrol ~= "log" then
        msg.warn("volumecontrol cannot be \"" ..
                user_opts.volumecontrol .. "\". Ignoring.")
        user_opts.volumecontrol = "linear"
    end
end

function update_options(list)
    validate_user_opts()
    request_tick()
    visibility_mode(user_opts.visibility, true)
    update_duration_watch()
    request_init()
end

local UNICODE_MINUS = string.char(0xe2, 0x88, 0x92)  -- UTF-8 for U+2212 MINUS SIGN

-- OSC INIT
function osc_init()
    msg.debug("osc_init")

    -- set canvas resolution according to display aspect and scaling setting
    local baseResY = 720
    local display_w, display_h, display_aspect = mp.get_osd_size()
    local scale = 1

    if (mp.get_property("video") == "no") then -- dummy/forced window
        scale = user_opts.scaleforcedwindow
    elseif state.fullscreen then
        scale = user_opts.scalefullscreen
    else
        scale = user_opts.scalewindowed
    end

    if user_opts.vidscale then
        osc_param.unscaled_y = baseResY
    else
        osc_param.unscaled_y = display_h
    end
    osc_param.playresy = osc_param.unscaled_y / scale
    if (display_aspect > 0) then
        osc_param.display_aspect = display_aspect
    end
    osc_param.playresx = osc_param.playresy * osc_param.display_aspect

    -- stop seeking with the slider to prevent skipping files
    state.active_element = nil

    elements = {}

    -- some often needed stuff
    local pl_count = mp.get_property_number("playlist-count", 0)
    local have_pl = (pl_count > 1)
    local pl_pos = mp.get_property_number("playlist-pos", 0) + 1
    local have_ch = (mp.get_property_number("chapters", 0) > 0)
    local loop = mp.get_property("loop-playlist", "no")

    local ne

    -- title
    ne = new_element("title", "button")

    ne.visible = user_opts.showtitle
    ne.content = function ()
        local title = state.forced_title or
                      mp.command_native({"expand-text", user_opts.title})
        -- escape ASS, and strip newlines and trailing slashes
        title = title:gsub("\\n", " "):gsub("\\$", ""):gsub("{","\\{")
        return not (title == "") and title or "mpv"
    end

    ne.eventresponder["mbtn_left_up"] = function ()
        local title = mp.get_property_osd("media-title")
        if (have_pl) then
            title = string.format("[%d/%d] %s", countone(pl_pos - 1),
                                  pl_count, title)
        end
        show_message(title)
    end

    ne.eventresponder["mbtn_right_up"] =
        function () show_message(mp.get_property_osd("filename")) end

    --
    -- playlist buttons
    --

    -- prev
    ne = new_element("pl_prev", "button")

    ne.content = osc_icons.playlist_prev
    ne.visible = (round(osc_param.display_aspect) > 1.1)
    ne.enabled = (pl_pos > 1) or (loop ~= "no")
    ne.eventresponder["mbtn_left_up"] =
        function ()
            mp.commandv("playlist-prev", "weak")
            if user_opts.playlist_osd then
                show_message(get_playlist(), 3)
            end
        end
    ne.eventresponder["shift+mbtn_left_up"] =
        function () show_message(get_playlist(), 3) end
    ne.eventresponder["mbtn_right_up"] =
        function () show_message(get_playlist(), 3) end

    -- next
    ne = new_element("pl_next", "button")

    ne.content = osc_icons.playlist_next
    ne.visible = (round(osc_param.display_aspect) > 1.1)
    ne.enabled = (have_pl and (pl_pos < pl_count)) or (loop ~= "no")
    ne.eventresponder["mbtn_left_up"] =
        function ()
            mp.commandv("playlist-next", "weak")
            if user_opts.playlist_osd then
                show_message(get_playlist(), 3)
            end
        end
    ne.eventresponder["shift+mbtn_left_up"] =
        function () show_message(get_playlist(), 3) end
    ne.eventresponder["mbtn_right_up"] =
        function () show_message(get_playlist(), 3) end

    --
    -- big buttons
    --

    -- playpause
    ne = new_element("playpause", "button")

    ne.content = function ()
        if mp.get_property("eof-reached") == "yes" then
            return (osc_icons.replay)
        elseif mp.get_property("pause") == "yes" then
            return (osc_icons.play)
        else
            return (osc_icons.pause)
        end
    end
    ne.eventresponder["mbtn_left_up"] =
        function ()
            if mp.get_property("eof-reached") == "yes" then
                mp.commandv("seek", 0, "absolute-percent")
                mp.commandv("set", "pause", "no")
            else
                mp.commandv("cycle", "pause")
            end
        end

    -- skipback
    ne = new_element("skipback", "button")

    ne.softrepeat = true
    ne.content = osc_icons.skipback
    ne.eventresponder["mbtn_left_down"] =
        function () mp.commandv("seek", -5, "relative", "keyframes") end
    ne.eventresponder["shift+mbtn_left_down"] =
        function () mp.commandv("frame-back-step") end
    ne.eventresponder["mbtn_right_down"] =
        function () mp.commandv("seek", -30, "relative", "keyframes") end

    -- skipfrwd
    ne = new_element("skipfrwd", "button")

    ne.softrepeat = true
    ne.content = osc_icons.skipforward
    ne.eventresponder["mbtn_left_down"] =
        function () mp.commandv("seek", 10, "relative", "keyframes") end
    ne.eventresponder["shift+mbtn_left_down"] =
        function () mp.commandv("frame-step") end
    ne.eventresponder["mbtn_right_down"] =
        function () mp.commandv("seek", 60, "relative", "keyframes") end

    -- ch_prev
    ne = new_element("ch_prev", "button")

    ne.enabled = have_ch
    ne.content = osc_icons.chapter_prev
    ne.visible = (round(osc_param.display_aspect) > 0.9)
    ne.eventresponder["mbtn_left_up"] =
        function ()
            mp.commandv("add", "chapter", -1)
            if user_opts.chapters_osd then
                show_message(get_chapterlist(), 3)
            end
        end
    ne.eventresponder["shift+mbtn_left_up"] =
        function () show_message(get_chapterlist(), 3) end
    ne.eventresponder["mbtn_right_up"] =
        function () show_message(get_chapterlist(), 3) end

    -- ch_next
    ne = new_element("ch_next", "button")

    ne.enabled = have_ch
    ne.content = osc_icons.chapter_next
    ne.visible = (round(osc_param.display_aspect) > 0.9)
    ne.eventresponder["mbtn_left_up"] =
        function ()
            mp.commandv("add", "chapter", 1)
            if user_opts.chapters_osd then
                show_message(get_chapterlist(), 3)
            end
        end
    ne.eventresponder["shift+mbtn_left_up"] =
        function () show_message(get_chapterlist(), 3) end
    ne.eventresponder["mbtn_right_up"] =
        function () show_message(get_chapterlist(), 3) end

    update_tracklist()

    -- cy_audio
    ne = new_element("cy_audio", "button")

    ne.enabled = (#tracks_osc.audio > 0)
    ne.inactive = (get_track("audio") == 0)
    ne.content = osc_icons.audio
    ne.tooltip_style = osc_styles.tooltip
    ne.tooltipF = function ()
        local msg = "OFF"
        if not (get_track("audio") == 0) then
            msg = "Audio ["..get_track("audio").."/"..#tracks_osc.audio.."] "
            local lang = mp.get_property("current-tracks/audio/lang") or "N/A"
            local title = mp.get_property("current-tracks/audio/title") or ""
            msg = msg .. "(" .. lang .. ")" .. " " .. title
            return msg
        end
        return msg
    end
    ne.eventresponder["mbtn_left_up"] =
        function () set_track("audio", 1) end
    ne.eventresponder["mbtn_right_up"] =
        function () set_track("audio", -1) end
    ne.eventresponder["shift+mbtn_left_down"] =
        function () show_message(get_tracklist("audio"), 2) end

    -- cy_sub
    ne = new_element("cy_sub", "button")

    ne.enabled = (#tracks_osc.sub > 0)
    ne.inactive = (get_track("sub") == 0)
    ne.content = osc_icons.subtitle
    ne.tooltip_style = osc_styles.tooltip
    ne.tooltipF = function ()
        local msg = "OFF"
        if not (get_track("sub") == 0) then
            msg = "Subtitle ["..get_track("sub").."/"..#tracks_osc.sub.."] "
            local lang = mp.get_property("current-tracks/sub/lang") or "N/A"
            local title = mp.get_property("current-tracks/sub/title") or ""
            msg = msg .. "(" .. lang .. ")" .. " " .. title
            return msg
        end
        return msg
    end
    ne.eventresponder["mbtn_left_up"] =
        function () set_track("sub", 1) end
    ne.eventresponder["mbtn_right_up"] =
        function () set_track("sub", -1) end
    ne.eventresponder["shift+mbtn_left_down"] =
        function () show_message(get_tracklist("sub"), 2) end

    -- tog_fs
    ne = new_element("tog_fs", "button")

    ne.content = function ()
        if (state.fullscreen) then
            return (osc_icons.fullscreen_exit)
        else
            return (osc_icons.fullscreen)
        end
    end
    ne.eventresponder["mbtn_left_up"] =
        function () mp.commandv("cycle", "fullscreen") end

    -- tog_info
    ne = new_element("tog_info", "button")

    ne.content = osc_icons.info
    ne.visible = (round(osc_param.display_aspect) > 0.6)
    ne.eventresponder["mbtn_left_up"] =
        function () mp.commandv("script-binding", "stats/display-stats-toggle") end

    -- seekbar
    ne = new_element("seekbar", "slider")

    ne.enabled = not (mp.get_property("percent-pos") == nil)
    ne.thumbnailable = true
    state.slider_element = ne.enabled and ne or nil  -- used for forced_title
    ne.slider.markerF = function ()
        local duration = mp.get_property_number("duration", nil)
        if not (duration == nil) then
            local chapters = mp.get_property_native("chapter-list", {})
            local markers = {}
            for n = 1, #chapters do
                markers[n] = (chapters[n].time / duration * 100)
            end
            return markers
        else
            return {}
        end
    end
    ne.slider.posF =
        function () return mp.get_property_number("percent-pos", nil) end
    ne.slider.tooltipF = function (pos)
        local duration = mp.get_property_number("duration", nil)
        if not ((duration == nil) or (pos == nil)) then
            possec = duration * (pos / 100)
            return mp.format_time(possec)
        else
            return ""
        end
    end
    ne.slider.seekRangesF = function()
        if user_opts.seekrangestyle == "none" then
            return nil
        end
        local cache_state = state.cache_state
        if not cache_state then
            return nil
        end
        local duration = mp.get_property_number("duration", nil)
        if (duration == nil) or duration <= 0 then
            return nil
        end
        local ranges = cache_state["seekable-ranges"]
        if #ranges == 0 then
            return nil
        end
        local nranges = {}
        for _, range in pairs(ranges) do
            nranges[#nranges + 1] = {
                ["start"] = 100 * range["start"] / duration,
                ["end"] = 100 * range["end"] / duration,
            }
        end
        return nranges
    end
    ne.eventresponder["mouse_move"] = --keyframe seeking when mouse is dragged
        function (element)
            -- allow drag for mbtnleft only
            if not element.state.mbtnleft then
                return
            end

            -- mouse move events may pile up during seeking and may still get
            -- sent when the user is done seeking, so we need to throw away
            -- identical seeks
            local seekto = get_slider_value(element)
            if (element.state.lastseek == nil) or
                (not (element.state.lastseek == seekto)) then
                    local flags = "absolute-percent"
                    if not user_opts.seekbarkeyframes then
                        flags = flags .. "+exact"
                    end
                    mp.commandv("seek", seekto, flags)
                    element.state.lastseek = seekto
            end
        end
    ne.eventresponder["mbtn_left_down"] = --exact seeks on single clicks
        function (element)
            element.state.mbtnleft = true
            mp.commandv("seek", get_slider_value(element), "absolute-percent", "exact")
        end
    ne.eventresponder["mbtn_left_up"] =
        function (element)
            element.state.mbtnleft = false
        end
    ne.eventresponder["mbtn_right_down"] = --seeks to closest chapter
        function (element)
            if (mp.get_property_native("chapter-list/count") > 0) then
                local pos = get_slider_value(element)
                local markers = element.slider.markerF()

                -- Compares the difference between the right-clicked position
                -- and the iterated marker to determine the closest chapter
                local ch, diff
                for i, marker in ipairs(markers) do
                    if not diff or (math.abs(pos - marker) < diff) then
                        diff = math.abs(pos - marker)
                        ch = i - 1 --chapter index starts from 0
                    end
                end

                mp.commandv("set", "chapter", ch)
                if user_opts.chapters_osd then
                    show_message(get_chapterlist(), 3)
                end
            end
        end
    ne.eventresponder["reset"] =
        function (element) element.state.lastseek = nil end

    -- tc_left (current pos)
    ne = new_element("tc_left", "button")

    ne.content = function ()
        if (state.tc_ms) then
            return (mp.get_property_osd("playback-time/full"))
        else
            return (mp.get_property_osd("playback-time"))
        end
    end
    ne.eventresponder["mbtn_left_up"] = function ()
        state.tc_ms = not state.tc_ms
        request_init()
    end

    -- tc_right (total/remaining time)
    ne = new_element("tc_right", "button")

    ne.visible = (mp.get_property_number("duration", 0) > 0)
    ne.content = function ()
        if (state.rightTC_trem) then
            local minus = user_opts.unicodeminus and UNICODE_MINUS or "-"
            if state.tc_ms then
                return (minus..mp.get_property_osd("playtime-remaining/full"))
            else
                return (minus..mp.get_property_osd("playtime-remaining"))
            end
        else
            if state.tc_ms then
                return (mp.get_property_osd("duration/full"))
            else
                return (mp.get_property_osd("duration"))
            end
        end
    end
    ne.eventresponder["mbtn_left_up"] =
        function () state.rightTC_trem = not state.rightTC_trem end

    -- cache
    ne = new_element("cache", "button")

    ne.visible = (round(osc_param.display_aspect) > 1.3)
    ne.content = function ()
        local cache_state = state.cache_state
        if not (cache_state and cache_state["seekable-ranges"] and
            #cache_state["seekable-ranges"] > 0) then
            -- probably not a network stream
            return ""
        end
        local dmx_cache = cache_state and cache_state["cache-duration"]
        local thresh = math.min(state.dmx_cache * 0.05, 5)  -- 5% or 5s
        if dmx_cache and math.abs(dmx_cache - state.dmx_cache) >= thresh then
            state.dmx_cache = dmx_cache
        else
            dmx_cache = state.dmx_cache
        end
        local min = math.floor(dmx_cache / 60)
        local sec = math.floor(dmx_cache % 60) -- don't round e.g. 59.9 to 60
        return "Cache: " .. (min > 0 and
            string.format("%sm%02.0fs", min, sec) or
            string.format("%3.0fs", sec))
    end

    -- volume
    ne = new_element("volume", "button")

    ne.enabled = (#tracks_osc.audio > 0)
    ne.content = function()
        local volume = mp.get_property_number("volume", 0)
        local mute = mp.get_property_native("mute")
        local volicon = {osc_icons.volume_low, osc_icons.volume_med,
                         osc_icons.volume_high, osc_icons.volume_loud}
        if volume == 0 or mute then
            return osc_icons.volume_mute
        else
            return volicon[math.min(4,math.ceil(volume / (100/3)))]
        end
    end
    ne.eventresponder["mbtn_left_up"] =
        function () mp.commandv("cycle", "mute") end
    ne.eventresponder["wheel_up_press"] =
        function () mp.commandv("osd-auto", "add", "volume", 5) end
    ne.eventresponder["wheel_down_press"] =
        function () mp.commandv("osd-auto", "add", "volume", -5) end

    -- volumebar
    ne = new_element("volumebar", "slider")

    ne.visible = user_opts.volumebar and round(osc_param.display_aspect) > 1.3
    ne.enabled = (get_track("audio") > 0)
    ne.slider.markerF = function () return {} end
    ne.slider.seekRangesF = function () return nil end
    ne.slider.posF =
        function ()
            local volume = mp.get_property_number("volume", nil)
            if user_opts.volumecontrol == "log" then
                return math.sqrt(volume * 100)
            else
                return volume
            end
        end
    ne.slider.tooltipF = function (pos) return set_volume(pos) end
    ne.eventresponder["mouse_move"] =
        function (element)
            -- see seekbar code for reference
            local pos = get_slider_value(element)
            local setvol = set_volume(pos)
            if (element.state.lastseek == nil) or
                (not (element.state.lastseek == setvol)) then
                    mp.commandv("set", "volume", setvol)
                    element.state.lastseek = setvol
            end
        end
    ne.eventresponder["mbtn_left_down"] =
        function (element)
            local pos = get_slider_value(element)
            mp.commandv("set", "volume", set_volume(pos))
        end
    ne.eventresponder["reset"] =
        function (element) element.state.lastseek = nil end
    ne.eventresponder["wheel_up_press"] =
        function () mp.commandv("osd-auto", "add", "volume", 5) end
    ne.eventresponder["wheel_down_press"] =
        function () mp.commandv("osd-auto", "add", "volume", -5) end

    -- load layout
    layout()

    -- load window controls
    if window_controls_enabled() then
        window_controls()
    end

    -- do something with the elements
    prepare_elements()
end

function update_margins()
    local margins = osc_param.video_margins

    -- Don't use margins if it's visible only temporarily.
    if (not state.osc_visible) or
       (state.fullscreen and not user_opts.showfullscreen) or
       (not state.fullscreen and not user_opts.showwindowed)
    then
        margins = {l = 0, r = 0, t = 0, b = 0}
    end

    utils.shared_script_property_set("osc-margins",
        string.format("%f,%f,%f,%f", margins.l, margins.r, margins.t, margins.b))
    mp.set_property_native("user-data/osc/margins", margins)
end

--
-- Other important stuff
--

function show_osc()
    -- show when disabled can happen (e.g. mouse_move) due to async/delayed unbinding
    if not state.enabled then return end

    msg.trace("show_osc")
    --remember last time of invocation (mouse move)
    state.showtime = mp.get_time()

    osc_visible(true)

    if (user_opts.fadeduration > 0) then
        state.anitype = nil
    end
end

function hide_osc()
    msg.trace("hide_osc")
    if not state.enabled then
        -- typically hide happens at render() from tick(), but now tick() is
        -- no-op and won't render again to remove the osc, so do that manually.
        state.osc_visible = false
        update_subpos(false)
        render_wipe()
    elseif (user_opts.fadeduration > 0) then
        if not(state.osc_visible == false) then
            state.anitype = "out"
            request_tick()
        end
    else
        osc_visible(false)
    end
end

function osc_visible(visible)
    if state.osc_visible ~= visible then
        state.osc_visible = visible
        if user_opts.movesub then
            observe_subpos(visible)
            update_subpos(visible)
        end
        update_margins()
    end
    request_tick()
end

function pause_state(name, enabled)
    state.paused = enabled
    if user_opts.showonpause then
        if enabled then
            state.lastvisibility = user_opts.visibility
            visibility_mode("always", true)
            show_osc()
        else
            visibility_mode(state.lastvisibility, true)
        end
    end
    request_tick()
end

function cache_state(name, st)
    state.cache_state = st
    request_tick()
end

-- Request that tick() is called (which typically re-renders the OSC).
-- The tick is then either executed immediately, or rate-limited if it was
-- called a small time ago.
function request_tick()
    if state.tick_timer == nil then
        state.tick_timer = mp.add_timeout(0, tick)
    end

    if not state.tick_timer:is_enabled() then
        local now = mp.get_time()
        local timeout = tick_delay - (now - state.tick_last_time)
        if timeout < 0 then
            timeout = 0
        end
        state.tick_timer.timeout = timeout
        state.tick_timer:resume()
    end
end

function mouse_leave()
    if get_hidetimeout() >= 0 then
        hide_osc()
    end
    -- reset mouse position
    state.last_mouseX, state.last_mouseY = nil, nil
    state.mouse_in_window = false
end

function request_init()
    state.initREQ = true
    request_tick()
end

-- Like request_init(), but also request an immediate update
function request_init_resize()
    request_init()
    -- ensure immediate update
    state.tick_timer:kill()
    state.tick_timer.timeout = 0
    state.tick_timer:resume()
end

function render_wipe()
    msg.trace("render_wipe()")
    state.osd.data = "" -- allows set_osd to immediately update on enable
    state.osd:remove()
end

function render()
    msg.trace("rendering")
    local current_screen_sizeX, current_screen_sizeY, aspect = mp.get_osd_size()
    local mouseX, mouseY = get_virt_mouse_pos()
    local now = mp.get_time()

    -- check if display changed, if so request reinit
    if not (state.mp_screen_sizeX == current_screen_sizeX
        and state.mp_screen_sizeY == current_screen_sizeY) then

        request_init_resize()

        state.mp_screen_sizeX = current_screen_sizeX
        state.mp_screen_sizeY = current_screen_sizeY
    end

    -- init management
    if state.active_element then
        -- mouse is held down on some element - keep ticking and igore initReq
        -- till it's released, or else the mouse-up (click) will misbehave or
        -- get ignored. that's because osc_init() recreates the osc elements,
        -- but mouse handling depends on the elements staying unmodified
        -- between mouse-down and mouse-up (using the index active_element).
        request_tick()
    elseif state.initREQ then
        osc_init()
        state.initREQ = false

        -- store initial mouse position
        if (state.last_mouseX == nil or state.last_mouseY == nil)
            and not (mouseX == nil or mouseY == nil) then

            state.last_mouseX, state.last_mouseY = mouseX, mouseY
        end
    end


    -- fade animation
    if not(state.anitype == nil) then

        if (state.anistart == nil) then
            state.anistart = now
        end

        if (now < state.anistart + (user_opts.fadeduration/1000)) then

            if (state.anitype == "in") then --fade in
                osc_visible(true)
                state.animation = scale_value(state.anistart,
                    (state.anistart + (user_opts.fadeduration/1000)),
                    255, 0, now)
            elseif (state.anitype == "out") then --fade out
                state.animation = scale_value(state.anistart,
                    (state.anistart + (user_opts.fadeduration/1000)),
                    0, 255, now)
            end

        else
            if (state.anitype == "out") then
                osc_visible(false)
            end
            kill_animation()
        end
    else
        kill_animation()
    end

    -- mouse show/hide area
    for k,cords in pairs(osc_param.areas["showhide"]) do
        set_virt_mouse_area(cords.x1, cords.y1, cords.x2, cords.y2, "showhide")
    end
    if osc_param.areas["showhide_wc"] then
        for k,cords in pairs(osc_param.areas["showhide_wc"]) do
            set_virt_mouse_area(cords.x1, cords.y1, cords.x2, cords.y2, "showhide_wc")
        end
    else
        set_virt_mouse_area(0, 0, 0, 0, "showhide_wc")
    end
    do_enable_keybindings()

    -- mouse input area
    local mouse_over_osc = false

    for _,cords in ipairs(osc_param.areas["input"]) do
        if state.osc_visible then -- activate only when OSC is actually visible
            set_virt_mouse_area(cords.x1, cords.y1, cords.x2, cords.y2, "input")
        end
        if state.osc_visible ~= state.input_enabled then
            if state.osc_visible then
                mp.enable_key_bindings("input")
            else
                mp.disable_key_bindings("input")
            end
            state.input_enabled = state.osc_visible
        end

        if (mouse_hit_coords(cords.x1, cords.y1, cords.x2, cords.y2)) then
            mouse_over_osc = true
        end
    end

    if osc_param.areas["window-controls"] then
        for _,cords in ipairs(osc_param.areas["window-controls"]) do
            if state.osc_visible then -- activate only when OSC is actually visible
                set_virt_mouse_area(cords.x1, cords.y1, cords.x2, cords.y2, "window-controls")
            end
            if state.osc_visible ~= state.windowcontrols_buttons then
                if state.osc_visible then
                    mp.enable_key_bindings("window-controls")
                else
                    mp.disable_key_bindings("window-controls")
                end
                state.windowcontrols_buttons = state.osc_visible
            end

            if (mouse_hit_coords(cords.x1, cords.y1, cords.x2, cords.y2)) then
                mouse_over_osc = true
            end
        end
    end

    if osc_param.areas["window-controls-title"] then
        for _,cords in ipairs(osc_param.areas["window-controls-title"]) do
            if (mouse_hit_coords(cords.x1, cords.y1, cords.x2, cords.y2)) then
                mouse_over_osc = true
            end
        end
    end

    -- autohide
    if not (state.showtime == nil) and (get_hidetimeout() >= 0) then
        local timeout = state.showtime + (get_hidetimeout()/1000) - now
        if timeout <= 0 then
            if (state.active_element == nil) and not (mouse_over_osc) then
                hide_osc()
            end
        else
            -- the timer is only used to recheck the state and to possibly run
            -- the code above again
            if not state.hide_timer then
                state.hide_timer = mp.add_timeout(0, tick)
            end
            state.hide_timer.timeout = timeout
            -- re-arm
            state.hide_timer:kill()
            state.hide_timer:resume()
        end
    end


    -- actual rendering
    local ass = assdraw.ass_new()

    -- Messages
    render_message(ass)

    -- actual OSC
    if state.osc_visible then
        render_elements(ass)
    end

    -- submit
    set_osd(osc_param.playresy * osc_param.display_aspect,
            osc_param.playresy, ass.text)
end

--
-- Event handling
--

local function element_has_action(element, action)
    return element and element.eventresponder and
        element.eventresponder[action]
end

function process_event(source, what)
    local action = string.format("%s%s", source,
        what and ("_" .. what) or "")

    if what == "down" or what == "press" then

        for n = 1, #elements do

            if mouse_hit(elements[n]) and
                elements[n].eventresponder and
                (elements[n].eventresponder[source .. "_up"] or
                    elements[n].eventresponder[action]) then

                if what == "down" then
                    state.active_element = n
                    state.active_event_source = source
                end
                -- fire the down or press event if the element has one
                if element_has_action(elements[n], action) then
                    elements[n].eventresponder[action](elements[n])
                end

            end
        end

    elseif what == "up" then

        if elements[state.active_element] then
            local n = state.active_element

            if n == 0 then
                --click on background (does not work)
            elseif element_has_action(elements[n], action) and
                mouse_hit(elements[n]) then

                elements[n].eventresponder[action](elements[n])
            end

            --reset active element
            if element_has_action(elements[n], "reset") then
                elements[n].eventresponder["reset"](elements[n])
            end

        end
        state.active_element = nil
        state.mouse_down_counter = 0

    elseif source == "mouse_move" then

        state.mouse_in_window = true

        local mouseX, mouseY = get_virt_mouse_pos()
        if (user_opts.minmousemove == 0) or
            (not ((state.last_mouseX == nil) or (state.last_mouseY == nil)) and
                ((math.abs(mouseX - state.last_mouseX) >= user_opts.minmousemove)
                    or (math.abs(mouseY - state.last_mouseY) >= user_opts.minmousemove)
                )
            ) then
            show_osc()
        end
        state.last_mouseX, state.last_mouseY = mouseX, mouseY

        local n = state.active_element
        if element_has_action(elements[n], action) then
            elements[n].eventresponder[action](elements[n])
        end
    end

    -- ensure rendering after any (mouse) event - icons could change etc
    request_tick()
end


local logo_lines = {
    -- White border
    "{\\c&HE5E5E5&\\p6}m 895 10 b 401 10 0 410 0 905 0 1399 401 1800 895 1800 1390 1800 1790 1399 1790 905 1790 410 1390 10 895 10 {\\p0}",
    -- Purple fill
    "{\\c&H682167&\\p6}m 925 42 b 463 42 87 418 87 880 87 1343 463 1718 925 1718 1388 1718 1763 1343 1763 880 1763 418 1388 42 925 42{\\p0}",
    -- Darker fill
    "{\\c&H430142&\\p6}m 1605 828 b 1605 1175 1324 1456 977 1456 631 1456 349 1175 349 828 349 482 631 200 977 200 1324 200 1605 482 1605 828{\\p0}",
    -- White fill
    "{\\c&HDDDBDD&\\p6}m 1296 910 b 1296 1131 1117 1310 897 1310 676 1310 497 1131 497 910 497 689 676 511 897 511 1117 511 1296 689 1296 910{\\p0}",
    -- Triangle
    "{\\c&H691F69&\\p6}m 762 1113 l 762 708 b 881 776 1000 843 1119 911 1000 978 881 1046 762 1113{\\p0}",
}

local santa_hat_lines = {
    -- Pompoms
    "{\\c&HC0C0C0&\\p6}m 500 -323 b 491 -322 481 -318 475 -311 465 -312 456 -319 446 -318 434 -314 427 -304 417 -297 410 -290 404 -282 395 -278 390 -274 387 -267 381 -265 377 -261 379 -254 384 -253 397 -244 409 -232 425 -228 437 -228 446 -218 457 -217 462 -216 466 -213 468 -209 471 -205 477 -203 482 -206 491 -211 499 -217 508 -222 532 -235 556 -249 576 -267 584 -272 584 -284 578 -290 569 -305 550 -312 533 -309 523 -310 515 -316 507 -321 505 -323 503 -323 500 -323{\\p0}",
    "{\\c&HE0E0E0&\\p6}m 315 -260 b 286 -258 259 -240 246 -215 235 -210 222 -215 211 -211 204 -188 177 -176 172 -151 170 -139 163 -128 154 -121 143 -103 141 -81 143 -60 139 -46 125 -34 129 -17 132 -1 134 16 142 30 145 56 161 80 181 96 196 114 210 133 231 144 266 153 303 138 328 115 373 79 401 28 423 -24 446 -73 465 -123 483 -174 487 -199 467 -225 442 -227 421 -232 402 -242 384 -254 364 -259 342 -250 322 -260 320 -260 317 -261 315 -260{\\p0}",
    -- Main cap
    "{\\c&H0000F0&\\p6}m 1151 -523 b 1016 -516 891 -458 769 -406 693 -369 624 -319 561 -262 526 -252 465 -235 479 -187 502 -147 551 -135 588 -111 1115 165 1379 232 1909 761 1926 800 1952 834 1987 858 2020 883 2053 912 2065 952 2088 1000 2146 962 2139 919 2162 836 2156 747 2143 662 2131 615 2116 567 2122 517 2120 410 2090 306 2089 199 2092 147 2071 99 2034 64 1987 5 1928 -41 1869 -86 1777 -157 1712 -256 1629 -337 1578 -389 1521 -436 1461 -476 1407 -509 1343 -507 1284 -515 1240 -519 1195 -521 1151 -523{\\p0}",
    -- Cap shadow
    "{\\c&H0000AA&\\p6}m 1657 248 b 1658 254 1659 261 1660 267 1669 276 1680 284 1689 293 1695 302 1700 311 1707 320 1716 325 1726 330 1735 335 1744 347 1752 360 1761 371 1753 352 1754 331 1753 311 1751 237 1751 163 1751 90 1752 64 1752 37 1767 14 1778 -3 1785 -24 1786 -45 1786 -60 1786 -77 1774 -87 1760 -96 1750 -78 1751 -65 1748 -37 1750 -8 1750 20 1734 78 1715 134 1699 192 1694 211 1689 231 1676 246 1671 251 1661 255 1657 248 m 1909 541 b 1914 542 1922 549 1917 539 1919 520 1921 502 1919 483 1918 458 1917 433 1915 407 1930 373 1942 338 1947 301 1952 270 1954 238 1951 207 1946 214 1947 229 1945 239 1939 278 1936 318 1924 356 1923 362 1913 382 1912 364 1906 301 1904 237 1891 175 1887 150 1892 126 1892 101 1892 68 1893 35 1888 2 1884 -9 1871 -20 1859 -14 1851 -6 1854 9 1854 20 1855 58 1864 95 1873 132 1883 179 1894 225 1899 273 1908 362 1910 451 1909 541{\\p0}",
    -- Brim and tip pompom
    "{\\c&HF8F8F8&\\p6}m 626 -191 b 565 -155 486 -196 428 -151 387 -115 327 -101 304 -47 273 2 267 59 249 113 219 157 217 213 215 265 217 309 260 302 285 283 373 264 465 264 555 257 608 252 655 292 709 287 759 294 816 276 863 298 903 340 972 324 1012 367 1061 394 1125 382 1167 424 1213 462 1268 482 1322 506 1385 546 1427 610 1479 662 1510 690 1534 725 1566 752 1611 796 1664 830 1703 880 1740 918 1747 986 1805 1005 1863 991 1897 932 1916 880 1914 823 1945 777 1961 725 1979 673 1957 622 1938 575 1912 534 1862 515 1836 473 1790 417 1755 351 1697 305 1658 266 1633 216 1593 176 1574 138 1539 116 1497 110 1448 101 1402 77 1371 37 1346 -16 1295 15 1254 6 1211 -27 1170 -62 1121 -86 1072 -104 1027 -128 976 -133 914 -130 851 -137 794 -162 740 -181 679 -168 626 -191 m 2051 917 b 1971 932 1929 1017 1919 1091 1912 1149 1923 1214 1970 1254 2000 1279 2027 1314 2066 1325 2139 1338 2212 1295 2254 1238 2281 1203 2287 1158 2282 1116 2292 1061 2273 1006 2229 970 2206 941 2167 938 2138 918{\\p0}",
}

-- called by mpv on every frame
function tick()
    if state.marginsREQ == true then
        update_margins()
        state.marginsREQ = false
    end

    if (not state.enabled) then return end

    if (state.idle) then

        -- render idle message
        msg.trace("idle message")
        local _, _, display_aspect = mp.get_osd_size()
        if display_aspect == 0 then
            return
        end
        local display_h = 360
        local display_w = display_h * display_aspect
        -- logo is rendered at 2^(6-1) = 32 times resolution with size 1800x1800
        local icon_x, icon_y = (display_w - 1800 / 32) / 2, 140
        local line_prefix = ("{\\rDefault\\an7\\1a&H00&\\bord0\\shad0\\pos(%f,%f)}"):format(icon_x, icon_y)

        local ass = assdraw.ass_new()
        -- mpv logo
        if user_opts.idlescreen then
            for i, line in ipairs(logo_lines) do
                ass:new_event()
                ass:append(line_prefix .. line)
            end
        end

        -- Santa hat
        if is_december and user_opts.idlescreen and not user_opts.greenandgrumpy then
            for i, line in ipairs(santa_hat_lines) do
                ass:new_event()
                ass:append(line_prefix .. line)
            end
        end

        if user_opts.idlescreen then
            ass:new_event()
            ass:pos(display_w / 2, icon_y + 65)
            ass:an(8)
            ass:append("Drop files or URLs to play here.")
        end
        set_osd(display_w, display_h, ass.text)

        if state.showhide_enabled then
            mp.disable_key_bindings("showhide")
            mp.disable_key_bindings("showhide_wc")
            state.showhide_enabled = false
        end


    elseif (state.fullscreen and user_opts.showfullscreen)
        or (not state.fullscreen and user_opts.showwindowed) then

        -- render the OSC
        render()
    else
        -- Flush OSD
        render_wipe()
    end

    state.tick_last_time = mp.get_time()

    if state.anitype ~= nil then
        -- state.anistart can be nil - animation should now start, or it can
        -- be a timestamp when it started. state.idle has no animation.
        if not state.idle and
           (not state.anistart or
            mp.get_time() < 1 + state.anistart + user_opts.fadeduration/1000)
        then
            -- animating or starting, or still within 1s past the deadline
            request_tick()
        else
            kill_animation()
        end
    end
end

function do_enable_keybindings()
    if state.enabled then
        if not state.showhide_enabled then
            mp.enable_key_bindings("showhide", "allow-vo-dragging+allow-hide-cursor")
            mp.enable_key_bindings("showhide_wc", "allow-vo-dragging+allow-hide-cursor")
        end
        state.showhide_enabled = true
    end
end

function enable_osc(enable)
    state.enabled = enable
    if enable then
        do_enable_keybindings()
    else
        hide_osc() -- acts immediately when state.enabled == false
        if state.showhide_enabled then
            mp.disable_key_bindings("showhide")
            mp.disable_key_bindings("showhide_wc")
        end
        state.showhide_enabled = false
    end
end

-- duration is observed for the sole purpose of updating chapter markers
-- positions. live streams with chapters are very rare, and the update is also
-- expensive (with request_init), so it's only observed when we have chapters
-- and the user didn't disable the livemarkers option (update_duration_watch).
function on_duration() request_init() end

local duration_watched = false
function update_duration_watch()
    local want_watch = user_opts.livemarkers and
                       (mp.get_property_number("chapters", 0) or 0) > 0 and
                       true or false  -- ensure it's a boolean

    if (want_watch ~= duration_watched) then
        if want_watch then
            mp.observe_property("duration", nil, on_duration)
        else
            mp.unobserve_property(on_duration)
        end
        duration_watched = want_watch
    end
end

validate_user_opts()
update_duration_watch()

mp.register_event("start-file", request_init)
if user_opts.showonstart then mp.register_event("file-loaded", show_osc) end
if user_opts.showonseek then mp.register_event("seek", show_osc) end

mp.observe_property("track-list", nil, request_init)
mp.observe_property("playlist", nil, request_init)
mp.observe_property("chapter-list", "native", function(_, list)
    list = list or {}  -- safety, shouldn't return nil
    table.sort(list, function(a, b) return a.time < b.time end)
    state.chapter_list = list
    update_duration_watch()
    request_init()
end)
mp.observe_property("sub-pos", "number", observe_subpos)

mp.register_script_message("osc-message", show_message)
mp.register_script_message("osc-chapterlist", function(dur)
    show_message(get_chapterlist(), dur)
end)
mp.register_script_message("osc-playlist", function(dur)
    show_message(get_playlist(), dur)
end)
mp.register_script_message("osc-tracklist", function(dur)
    local msg = {}
    for k,v in pairs(nicetypes) do
        table.insert(msg, get_tracklist(k))
    end
    show_message(table.concat(msg, '\n\n'), dur)
end)
mp.register_script_message("thumbfast-info", function(json)
    local data = utils.parse_json(json)
    if type(data) ~= "table" or not data.width or not data.height then
        msg.error("thumbfast-info: received json didn't produce a table with thumbnail information")
    else
        thumbfast = data
    end
end)

mp.observe_property("fullscreen", "bool",
    function(name, val)
        state.fullscreen = val
        state.marginsREQ = true
        request_init_resize()
    end
)
mp.observe_property("border", "bool",
    function(name, val)
        state.border = val
        request_init_resize()
    end
)
mp.observe_property("window-maximized", "bool",
    function(name, val)
        state.maximized = val
        request_init_resize()
    end
)
mp.observe_property("idle-active", "bool",
    function(name, val)
        state.idle = val
        request_tick()
    end
)
mp.observe_property("pause", "bool", pause_state)
mp.observe_property("demuxer-cache-state", "native", cache_state)
mp.observe_property("vo-configured", "bool", function(name, val)
    request_tick()
end)
mp.observe_property("playback-time", "number", function(name, val)
    request_tick()
end)
mp.observe_property("osd-dimensions", "native", function(name, val)
    -- (we could use the value instead of re-querying it all the time, but then
    --  we might have to worry about property update ordering)
    request_init_resize()
end)

-- mouse show/hide bindings
mp.set_key_bindings({
    {"mouse_move",              function(e) process_event("mouse_move", nil) end},
    {"mouse_leave",             mouse_leave},
}, "showhide", "force")
mp.set_key_bindings({
    {"mouse_move",              function(e) process_event("mouse_move", nil) end},
    {"mouse_leave",             mouse_leave},
}, "showhide_wc", "force")
do_enable_keybindings()

--mouse input bindings
mp.set_key_bindings({
    {"mbtn_left",           function(e) process_event("mbtn_left", "up") end,
                            function(e) process_event("mbtn_left", "down")  end},
    {"shift+mbtn_left",     function(e) process_event("shift+mbtn_left", "up") end,
                            function(e) process_event("shift+mbtn_left", "down")  end},
    {"mbtn_right",          function(e) process_event("mbtn_right", "up") end,
                            function(e) process_event("mbtn_right", "down")  end},
    -- alias to shift_mbtn_left for single-handed mouse use
    {"mbtn_mid",            function(e) process_event("shift+mbtn_left", "up") end,
                            function(e) process_event("shift+mbtn_left", "down")  end},
    {"wheel_up",            function(e) process_event("wheel_up", "press") end},
    {"wheel_down",          function(e) process_event("wheel_down", "press") end},
    {"mbtn_left_dbl",       "ignore"},
    {"shift+mbtn_left_dbl", "ignore"},
    {"mbtn_right_dbl",      "ignore"},
}, "input", "force")
mp.enable_key_bindings("input")

mp.set_key_bindings({
    {"mbtn_left",           function(e) process_event("mbtn_left", "up") end,
                            function(e) process_event("mbtn_left", "down")  end},
}, "window-controls", "force")
mp.enable_key_bindings("window-controls")

function get_hidetimeout()
    if user_opts.visibility == "always" then
        return -1 -- disable autohide
    end
    return user_opts.hidetimeout
end

function always_on(val)
    if state.enabled then
        if val then
            show_osc()
        else
            hide_osc()
        end
    end
end

-- mode can be auto/always/never/cycle
-- the modes only affect internal variables and not stored on its own.
function visibility_mode(mode, no_osd)
    if mode == "cycle" then
        if not state.enabled then
            mode = "auto"
        elseif user_opts.visibility ~= "always" then
            mode = "always"
        else
            mode = "never"
        end
    end

    if mode == "auto" then
        always_on(false)
        enable_osc(true)
    elseif mode == "always" then
        enable_osc(true)
        always_on(true)
    elseif mode == "never" then
        enable_osc(false)
    else
        msg.warn("Ignoring unknown visibility mode '" .. mode .. "'")
        return
    end

    user_opts.visibility = mode
    utils.shared_script_property_set("osc-visibility", mode)
    mp.set_property_native("user-data/osc/visibility", mode)

    if not no_osd and tonumber(mp.get_property("osd-level")) >= 1 then
        mp.osd_message("OSC visibility: " .. mode)
    end

    -- Reset the input state on a mode change. The input state will be
    -- recalculated on the next render cycle, except in 'never' mode where it
    -- will just stay disabled.
    mp.disable_key_bindings("input")
    mp.disable_key_bindings("window-controls")
    state.input_enabled = false

    update_margins()
    request_tick()
end

function idlescreen_visibility(mode, no_osd)
    if mode == "cycle" then
        if user_opts.idlescreen then
            mode = "no"
        else
            mode = "yes"
        end
    end

    if mode == "yes" then
        user_opts.idlescreen = true
    else
        user_opts.idlescreen = false
    end

    utils.shared_script_property_set("osc-idlescreen", mode)
    mp.set_property_native("user-data/osc/idlescreen", user_opts.idlescreen)

    if not no_osd and tonumber(mp.get_property("osd-level")) >= 1 then
        mp.osd_message("OSC logo visibility: " .. tostring(mode))
    end

    request_tick()
end

visibility_mode(user_opts.visibility, true)
mp.register_script_message("osc-visibility", visibility_mode)
mp.add_key_binding(nil, "visibility", function() visibility_mode("cycle") end)

mp.register_script_message("osc-idlescreen", idlescreen_visibility)

set_virt_mouse_area(0, 0, 0, 0, "input")
set_virt_mouse_area(0, 0, 0, 0, "window-controls")