summaryrefslogtreecommitdiffstats
path: root/player/lua/defaults.lua
blob: ff703520119c3b62102f5b8b84ef9577ea1c01b6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
-- these are used internally by lua.c
mp.UNKNOWN_TYPE.info = "this value is inserted if the C type is not supported"
mp.UNKNOWN_TYPE.type = "UNKNOWN_TYPE"

mp.ARRAY.info = "native array"
mp.ARRAY.type = "ARRAY"

mp.MAP.info = "native map"
mp.MAP.type = "MAP"

function mp.get_script_name()
    return mp.script_name
end

function mp.get_opt(key, def)
    local opts = mp.get_property_native("options/lua-opts")
    local val = opts[key]
    if val == nil then
        val = def
    end
    return val
end

-- For dispatching script_binding. This is sent as:
--      script_message_to $script_name $binding_name $keystate
-- The array is indexed by $binding_name, and has functions like this as value:
--      fn($binding_name, $keystate)
local dispatch_key_bindings = {}

local message_id = 0
local function reserve_binding()
    message_id = message_id + 1
    return "__keybinding" .. tostring(message_id)
end

local function dispatch_key_binding(name, state)
    local fn = dispatch_key_bindings[name]
    if fn then
        fn(name, state)
    end
end

-- "Old", deprecated API

-- each script has its own section, so that they don't conflict
local default_section = "input_dispatch_" .. mp.script_name

-- Set the list of key bindings. These will override the user's bindings, so
-- you should use this sparingly.
-- A call to this function will remove all bindings previously set with this
-- function. For example, set_key_bindings({}) would remove all script defined
-- key bindings.
-- Note: the bindings are not active by default. Use enable_key_bindings().
--
-- list is an array of key bindings, where each entry is an array as follow:
--      {key, callback_press, callback_down, callback_up}
-- key is the key string as used in input.conf, like "ctrl+a"
--
-- callback can be a string too, in which case the following will be added like
-- an input.conf line: key .. " " .. callback
-- (And callback_down is ignored.)
function mp.set_key_bindings(list, section, flags)
    local cfg = ""
    for i = 1, #list do
        local entry = list[i]
        local key = entry[1]
        local cb = entry[2]
        local cb_down = entry[3]
        local cb_up = entry[4]
        if type(cb) ~= "string" then
            local mangle = reserve_binding()
            dispatch_key_bindings[mangle] = function(name, state)
                local event = state:sub(1, 1)
                local is_mouse = state:sub(2, 2) == "m"
                local def = (is_mouse and "u") or "d"
                if event == "r" then
                    return
                end
                if event == "p" and cb then
                    cb()
                elseif event == "d" and cb_down then
                    cb_down()
                elseif event == "u" and cb_up then
                    cb_up()
                elseif event == def and cb then
                    cb()
                end
            end
            cfg = cfg .. key .. " script_binding " ..
                  mp.script_name .. "/" .. mangle .. "\n"
        else
            cfg = cfg .. key .. " " .. cb .. "\n"
        end
    end
    mp.input_define_section(section or default_section, cfg, flags)
end

function mp.enable_key_bindings(section, flags)
    mp.input_enable_section(section or default_section, flags)
end

function mp.disable_key_bindings(section)
    mp.input_disable_section(section or default_section)
end

function mp.set_mouse_area(x0, y0, x1, y1, section)
    mp.input_set_section_mouse_area(section or default_section, x0, y0, x1, y1)
end

-- "Newer" and more convenient API

local key_bindings = {}

local function update_key_bindings()
    for i = 1, 2 do
        local section, flags
        local def = i == 1
        if def then
            section = "input_" .. mp.script_name
            flags = "default"
        else
            section = "input_forced_" .. mp.script_name
            flags = "force"
        end
        local cfg = ""
        for k, v in pairs(key_bindings) do
            if v.forced ~= def then
                cfg = cfg .. v.bind .. "\n"
            end
        end
        mp.input_define_section(section, cfg, flags)
        -- TODO: remove the section if the script is stopped
        mp.input_enable_section(section, "allow-hide-cursor|allow-vo-dragging")
    end
end

local function add_binding(attrs, key, name, fn, rp)
    rp = rp or ""
    if (type(name) ~= "string") and (not fn) then
        fn = name
        name = reserve_binding()
    end
    local bind = key
    local repeatable = rp == "repeatable" or rp["repeatable"]
    if rp["forced"] then
        attrs.forced = true
    end
    local key_cb, msg_cb
    if not fn then
        fn = function() end
    end
    if rp["complex"] then
        local key_states = {
            ["u"] = "up",
            ["d"] = "down",
            ["r"] = "repeat",
            ["p"] = "press",
        }
        key_cb = function(name, state)
            fn({
                event = key_states[state:sub(1, 1)] or "unknown",
                is_mouse = state:sub(2, 2) == "m"
            })
        end
        msg_cb = function()
            fn({event = "press", is_mouse = false})
        end
    else
        key_cb = function(name, state)
            -- Emulate the same semantics as input.c uses for most bindings:
            -- For keyboard, "down" runs the command, "up" does nothing;
            -- for mouse, "down" does nothing, "up" runs the command.
            -- Also, key repeat triggers the binding again.
            local event = state:sub(1, 1)
            local is_mouse = state:sub(2, 2) == "m"
            if event == "r" and not repeatable then
                return
            end
            if is_mouse and event == "u" then
                fn()
            elseif (not is_mouse) and (event == "d" or event == "r") then
                fn()
            end
        end
        msg_cb = fn
    end
    attrs.bind = bind .. " script_binding " .. mp.script_name .. "/" .. name
    attrs.name = name
    key_bindings[name] = attrs
    update_key_bindings()
    dispatch_key_bindings[name] = key_cb
    mp.register_script_message(name, msg_cb)
end

function mp.add_key_binding(...)
    add_binding({forced=false}, ...)
end

function mp.add_forced_key_binding(...)
    add_binding({forced=true}, ...)
end

function mp.remove_key_binding(name)
    key_bindings[name] = nil
    update_key_bindings()
    mp.unregister_script_message(name)
end

local timers = {}

local timer_mt = {}
timer_mt.__index = timer_mt

function mp.add_timeout(seconds, cb)
    local t = mp.add_periodic_timer(seconds, cb)
    t.oneshot = true
    return t
end

function mp.add_periodic_timer(seconds, cb)
    local t = {
        timeout = seconds,
        cb = cb,
        oneshot = false,
    }
    setmetatable(t, timer_mt)
    t:resume()
    return t
end

function timer_mt.stop(t)
    if timers[t] then
        timers[t] = nil
        t.next_deadline = t.next_deadline - mp.get_time()
    end
end

function timer_mt.kill(t)
    timers[t] = nil
    t.next_deadline = nil
end
mp.cancel_timer = timer_mt.kill

function timer_mt.resume(t)
    if not timers[t] then
        local timeout = t.next_deadline
        if timeout == nil then
            timeout = t.timeout
        end
        t.next_deadline = mp.get_time() + timeout
        timers[t] = t
    end
end

-- Return the timer that expires next.
local function get_next_timer()
    local best = nil
    for t, _ in pairs(timers) do
        if (best == nil) or (t.next_deadline < best.next_deadline) then
            best = t
        end
    end
    return best
end

function mp.get_next_timeout()
    local timer = get_next_timer()
    if not timer then
        return
    end
    local now = mp.get_time()
    return timer.next_deadline - now
end

-- Run timers that have met their deadline.
-- Return: next absolute time a timer expires as number, or nil if no timers
local function process_timers()
    while true do
        local timer = get_next_timer()
        if not timer then
            return
        end
        local now = mp.get_time()
        local wait = timer.next_deadline - now
        if wait > 0 then
            return wait
        else
            if timer.oneshot then
                timer:kill()
            else
                timer.next_deadline = now + timer.timeout
            end
            timer.cb()
        end
    end
end

local messages = {}

function mp.register_script_message(name, fn)
    messages[name] = fn
end

function mp.unregister_script_message(name)
    messages[name] = nil
end

local function message_dispatch(ev)
    if #ev.args > 0 then
        local handler = messages[ev.args[1]]
        if handler then
            handler(unpack(ev.args, 2))
        end
    end
end

local property_id = 0
local properties = {}

function mp.observe_property(name, t, cb)
    local id = property_id + 1
    property_id = id
    properties[id] = cb
    mp.raw_observe_property(id, name, t)
end

function mp.unobserve_property(cb)
    for prop_id, prop_cb in pairs(properties) do
        if cb == prop_cb then
            properties[prop_id] = nil
        end
    end
end

local function property_change(ev)
    local prop = properties[ev.id]
    if prop then
        prop(ev.name, ev.data)
    end
end

-- used by default event loop (mp_event_loop()) to decide when to quit
mp.keep_running = true

local event_handlers = {}

function mp.register_event(name, cb)
    local list = event_handlers[name]
    if not list then
        list = {}
        event_handlers[name] = list
    end
    list[#list + 1] = cb
    return mp.request_event(name, true)
end

function mp.unregister_event(cb)
    for name, sub in pairs(event_handlers) do
        local found = false
        for i, e in ipairs(sub) do
            if e == cb then
                found = true
                break
            end
        end
        if found then
            -- create a new array, just in case this function was called
            -- from an event handler
            local new = {}
            for i = 1, #sub do
                if sub[i] ~= cb then
                    new[#new + 1] = sub[i]
                end
            end
            event_handlers[name] = new
            if #new == 0 then
                mp.request_event(name, false)
            end
        end
    end
end

-- default handlers
mp.register_event("shutdown", function() mp.keep_running = false end)
mp.register_event("client-message", message_dispatch)
mp.register_event("property-change", property_change)

-- sent by "script_binding"
mp.register_script_message("key-binding", dispatch_key_binding)

mp.msg = {
    log = mp.log,
    fatal = function(...) return mp.log("fatal", ...) end,
    error = function(...) return mp.log("error", ...) end,
    warn = function(...) return mp.log("warn", ...) end,
    info = function(...) return mp.log("info", ...) end,
    verbose = function(...) return mp.log("v", ...) end,
    debug = function(...) return mp.log("debug", ...) end,
}

_G.print = mp.msg.info

package.loaded["mp"] = mp
package.loaded["mp.msg"] = mp.msg

_G.mp_event_loop = function()
    mp.dispatch_events(true)
end

local function call_event_handlers(e)
    local handlers = event_handlers[e.event]
    if handlers then
        for _, handler in ipairs(handlers) do
            handler(e)
        end
    end
end

mp.use_suspend = true

function mp.dispatch_events(allow_wait)
    local more_events = true
    if mp.use_suspend then
        mp.suspend()
    end
    while mp.keep_running do
        local wait = process_timers()
        if wait == nil then
            wait = 1e20 -- infinity for all practical purposes
        end
        if more_events or wait < 0 then
            wait = 0
        end
        -- Resume playloop - important especially if an error happened while
        -- suspended, and the error was handled, but no resume was done.
        if wait > 0 then
            mp.resume_all()
            if allow_wait ~= true then
                return
            end
        end
        local e = mp.wait_event(wait)
        -- Empty the event queue while suspended; otherwise, each
        -- event will keep us waiting until the core suspends again.
        if mp.use_suspend then
            mp.suspend()
        end
        more_events = (e.event ~= "none")
        if more_events then
            call_event_handlers(e)
        end
    end
end

-- additional helpers

function mp.osd_message(text, duration)
    if not duration then
        duration = "-1"
    else
        duration = tostring(math.floor(duration * 1000))
    end
    mp.commandv("show_text", text, duration)
end

local hook_table = {}
local hook_registered = false

local function hook_run(id, cont)
    local fn = hook_table[tonumber(id)]
    if fn then
        fn()
    end
    mp.commandv("hook_ack", cont)
end

function mp.add_hook(name, pri, cb)
    if not hook_registered then
        mp.register_script_message("hook_run", hook_run)
        hook_registered = true
    end
    local id = #hook_table + 1
    hook_table[id] = cb
    mp.commandv("hook_add", name, id, pri)
end

function mp.format_table(t, set)
    if not set then
        set = { [t] = true }
    end
    local res = "{"
    -- pretty expensive but simple way to distinguish array and map parts of t
    local keys = {}
    local vals = {}
    local arr = 0
    for i = 1, #t do
        if t[i] == nil then
            break
        end
        keys[i] = i
        vals[i] = t[i]
        arr = i
    end
    for k, v in pairs(t) do
        if not (type(k) == "number" and k >= 1 and k <= arr and keys[k]) then
            keys[#keys + 1] = k
            vals[#keys] = v
        end
    end
    local function fmtval(v)
        if type(v) == "string" then
            return "\"" .. v .. "\""
        elseif type(v) == "table" then
            if set[v] then
                return "[cycle]"
            end
            set[v] = true
            return mp.format_table(v, set)
        else
            return tostring(v)
        end
    end
    for i = 1, #keys do
        if #res > 1 then
            res = res .. ", "
        end
        if i > arr then
            res = res .. fmtval(keys[i]) .. " = "
        end
        res = res .. fmtval(vals[i])
    end
    res = res .. "}"
    return res
end

return {}