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fix: properly update title (#318)

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Get the properties relevant to the title, observe and update based on
their changes.
This commit is contained in:
christoph-heinrich
2022-10-12 08:41:39 +02:00
committed by GitHub
parent 5995bfb7ae
commit 2c4cfd70ee
1 changed files with 32 additions and 13 deletions
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45
scripts/uosc.lua
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@@ -654,6 +654,24 @@ function wrap_text(text, target_line_length)
return table.concat(lines, '\n'), max_length, #lines
end
---Extracts the properties used by property expansion of that string.
---@param str string
---@param res { [string] : boolean } | nil
---@return { [string] : boolean }
local function get_expansion_props(str, res)
res = res or {}
for str in str:gmatch('%$(%b{})') do
local name, str = str:match('^{[?!]?=?([^:]+):?(.*)}$')
if name then
local s = name:find('==') or nil
if s then name = name:sub(0, s - 1) end
res[name] = true
if str and str ~= '' then get_expansion_props(str, res) end
end
end
return res
end
-- Escape a string for verbatim display on the OSD
---@param str string
function ass_escape(str)
@@ -4290,30 +4308,31 @@ mp.observe_property('mouse-pos', 'native', function(_, mouse)
else handle_mouse_leave() end
end)
mp.observe_property('osc', 'bool', function(name, value) if value == true then mp.set_property('osc', 'no') end end)
function update_title(title_template)
if title_template:sub(-6) == ' - mpv' then title_template = title_template:sub(1, -7) end
set_state('title', ass_escape(mp.command_native({'expand-text', title_template})))
end
mp.register_event('file-loaded', function()
set_state('path', normalize_path(mp.get_property_native('path')))
update_title(mp.get_property_native('title'))
end)
mp.register_event('end-file', function(event)
set_state('title', nil)
if event.reason == 'eof' then
file_end_timer:kill()
handle_file_end()
end
end)
do
local hot_keywords = {'time', 'percent'}
local timer = mp.add_periodic_timer(0.9, function() update_title(mp.get_property_native('title')) end)
timer:kill()
local template = nil
function update_title()
if template:sub(-6) == ' - mpv' then template = template:sub(1, -7) end
-- escape ASS, and strip newlines and trailing slashes and trim whitespace
local t = mp.command_native({'expand-text', template}):gsub('\\n', ' '):gsub('[\\%s]+$', ''):gsub('^%s+', '')
set_state('title', ass_escape(t))
end
mp.observe_property('title', 'string', function(_, title)
update_title(title)
-- Enable periodic updates for templates with hot variables
local is_hot = itable_find(hot_keywords, function(var) return string.find(title or '', var) ~= nil end)
if is_hot then timer:resume() else timer:kill() end
mp.unobserve_property(update_title)
template = title
local props = get_expansion_props(title)
for prop, _ in pairs(props) do
mp.observe_property(prop, 'native', update_title)
end
if not next(props) then update_title() end
end)
end
mp.observe_property('playback-time', 'number', create_state_setter('time', function()