To chat in mpv, press enter, write message, press chat again + move input area to top and make bigger

resources/syncplayintf.lua

@@ -10,6 +10,7 @@ local CHAT_FORMAT = "{\\fs60}{\an1}{\\q2}"
 local MAX_ROWS = 7
 local MOVEMENT_PER_TICK = 6
 local TICK_FREQUENCY = 0.03
+local INPUT_PROMPT_FONT_SIZE = 25
 
 local chat_log = {}
 
@@ -38,8 +39,6 @@ end
 
 function chat_update()
     ass = assdraw.ass_new()
-	local screenx, screeny, aspect = mp.get_osd_size()
-	local chat_messages = #chat_log
 	local chat_ass = ''
 	if #chat_log > 0 then
 		for i = 1, #chat_log do
@@ -59,11 +58,386 @@ function chat_update()
 		end
 	end
 	ass:append(chat_ass)
+	ass:append(input_ass())
 	mp.set_osd_ass(CANVAS_WIDTH,CANVAS_HEIGHT, ass.text)
 end
 chat_timer=mp.add_periodic_timer(TICK_FREQUENCY, chat_update)
---mp.register_event("tick", chat_update)
 
 mp.register_script_message('chat', function(e)
 	add_chat(e)
-end)
+end)
+
+-- adapted from repl.lua -- A graphical REPL for mpv input commands
+--
+-- c 2016, James Ross-Gowan
+--
+-- Permission to use, copy, modify, and/or distribute this software for any
+-- purpose with or without fee is hereby granted, provided that the above
+-- copyright notice and this permission notice appear in all copies.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+-- Default options
+local opts = {
+	-- All drawing is scaled by this value, including the text borders and the
+	-- cursor. Change it if you have a high-DPI display.
+	scale = 1,
+	-- Set the font used for the REPL and the console. This probably doesn't
+	-- have to be a monospaced font.
+	font = 'monospace',
+	-- Set the font size used for the REPL and the console. This will be
+	-- multiplied by "scale."
+	['font-size'] = INPUT_PROMPT_FONT_SIZE,
+}
+
+function detect_platform()
+	local o = {}
+	-- Kind of a dumb way of detecting the platform but whatever
+	if mp.get_property_native('options/vo-mmcss-profile', o) ~= o then
+		return 'windows'
+	elseif mp.get_property_native('options/input-app-events', o) ~= o then
+		return 'macos'
+	end
+	return 'linux'
+end
+
+-- Pick a better default font for Windows and macOS
+local platform = detect_platform()
+if platform == 'windows' then
+	opts.font = 'Consolas'
+elseif platform == 'macos' then
+	opts.font = 'Menlo'
+end
+
+-- Apply user-set options
+--options.read_options(opts)
+
+-- Escape a string for verbatim display on the OSD
+function ass_escape(str)
+	-- There is no escape for '\' in ASS (I think?) but '\' is used verbatim if
+	-- it isn't followed by a recognised character, so add a zero-width
+	-- non-breaking space
+	str = str:gsub('\\', '\\\239\187\191')
+	str = str:gsub('{', '\\{')
+	str = str:gsub('}', '\\}')
+	-- Precede newlines with a ZWNBSP to prevent ASS's weird collapsing of
+	-- consecutive newlines
+	str = str:gsub('\n', '\239\187\191\\N')
+	return str
+end
+
+function update()
+	return
+end
+
+local repl_active = false
+local insert_mode = false
+local line = ''
+local cursor = 1
+
+function input_ass()
+	if not repl_active then
+		return ""
+	end
+
+	local style = '{\\r' ..
+	               '\\1a&H00&\\3a&H00&\\4a&H99&' ..
+	               '\\1c&Heeeeee&\\3c&H111111&\\4c&H000000&' ..
+	               '\\fn' .. opts.font .. '\\fs' .. opts['font-size'] ..
+	               '\\bord2\\xshad0\\yshad1\\fsp0\\q1}'
+	-- Create the cursor glyph as an ASS drawing. ASS will draw the cursor
+	-- inline with the surrounding text, but it sets the advance to the width
+	-- of the drawing. So the cursor doesn't affect layout too much, make it as
+	-- thin as possible and make it appear to be 1px wide by giving it 0.5px
+	-- horizontal borders.
+	local cheight = opts['font-size'] * 8
+	local cglyph = '{\\r' ..
+	                '\\1a&H44&\\3a&H44&\\4a&H99&' ..
+	                '\\1c&Heeeeee&\\3c&Heeeeee&\\4c&H000000&' ..
+	                '\\xbord0.5\\ybord0\\xshad0\\yshad1\\p4\\pbo24}' ..
+	               'm 0 0 l 1 0 l 1 ' .. cheight .. ' l 0 ' .. cheight ..
+	               '{\\p0}'
+	local before_cur = ass_escape(line:sub(1, cursor - 1))
+	local after_cur = ass_escape(line:sub(cursor))
+
+	--mp.osd_message("",0)
+	return "{\\an7}{\\pos(5,5)}"..style..'> '..before_cur..cglyph..style..after_cur
+
+end
+
+-- Set the REPL visibility (`, Esc)
+function set_active(active)
+	if active == repl_active then return end
+	if active then
+		repl_active = true
+		insert_mode = false
+		mp.enable_key_bindings('repl-input', 'allow-hide-cursor+allow-vo-dragging')
+	else
+		repl_active = false
+		mp.disable_key_bindings('repl-input')
+	end
+end
+
+-- Show the repl if hidden and replace its contents with 'text'
+-- (script-message-to repl type)
+function show_and_type(text)
+	text = text or ''
+
+	-- Save the line currently being edited, just in case
+	if line ~= text and line ~= '' and history[#history] ~= line then
+		history[#history + 1] = line
+	end
+
+	line = text
+	cursor = line:len() + 1
+	history_pos = #history + 1
+	insert_mode = false
+	if repl_active then
+		update()
+	else
+		set_active(true)
+	end
+end
+
+-- Naive helper function to find the next UTF-8 character in 'str' after 'pos'
+-- by skipping continuation bytes. Assumes 'str' contains valid UTF-8.
+function next_utf8(str, pos)
+	if pos > str:len() then return pos end
+	repeat
+		pos = pos + 1
+	until pos > str:len() or str:byte(pos) < 0x80 or str:byte(pos) > 0xbf
+	return pos
+end
+
+-- As above, but finds the previous UTF-8 charcter in 'str' before 'pos'
+function prev_utf8(str, pos)
+	if pos <= 1 then return pos end
+	repeat
+		pos = pos - 1
+	until pos <= 1 or str:byte(pos) < 0x80 or str:byte(pos) > 0xbf
+	return pos
+end
+
+-- Insert a character at the current cursor position (' '-'~', Shift+Enter)
+function handle_char_input(c)
+	if insert_mode then
+		line = line:sub(1, cursor - 1) .. c .. line:sub(next_utf8(line, cursor))
+	else
+		line = line:sub(1, cursor - 1) .. c .. line:sub(cursor)
+	end
+	cursor = cursor + 1
+	update()
+end
+
+-- Remove the character behind the cursor (Backspace)
+function handle_backspace()
+	if cursor <= 1 then return end
+	local prev = prev_utf8(line, cursor)
+	line = line:sub(1, prev - 1) .. line:sub(cursor)
+	cursor = prev
+	update()
+end
+
+-- Remove the character in front of the cursor (Del)
+function handle_del()
+	if cursor > line:len() then return end
+	line = line:sub(1, cursor - 1) .. line:sub(next_utf8(line, cursor))
+	update()
+end
+
+-- Toggle insert mode (Ins)
+function handle_ins()
+	insert_mode = not insert_mode
+end
+
+-- Move the cursor to the next character (Right)
+function next_char(amount)
+	cursor = next_utf8(line, cursor)
+	update()
+end
+
+-- Move the cursor to the previous character (Left)
+function prev_char(amount)
+	cursor = prev_utf8(line, cursor)
+	update()
+end
+
+-- Clear the current line (Ctrl+C)
+function clear()
+	line = ''
+	cursor = 1
+	insert_mode = false
+	update()
+end
+
+-- Close the REPL if the current line is empty, otherwise do nothing (Ctrl+D)
+function maybe_exit()
+	if line == '' then
+		set_active(false)
+	end
+end
+
+-- Run the current command and clear the line (Enter)
+function handle_enter()
+	if not repl_active then
+		set_active(true)
+		return
+	end
+	set_active(false)
+
+	if line == '' then
+		return
+	end
+	mp.command('print-text "<chat>'..line..'</chat>"')
+	clear()
+end
+
+-- Move the cursor to the beginning of the line (HOME)
+function go_home()
+	cursor = 1
+	update()
+end
+
+-- Move the cursor to the end of the line (END)
+function go_end()
+	cursor = line:len() + 1
+	update()
+end
+
+-- Delete from the cursor to the end of the line (Ctrl+K)
+function del_to_eol()
+	line = line:sub(1, cursor - 1)
+	update()
+end
+
+-- Delete from the cursor back to the start of the line (Ctrl+U)
+function del_to_start()
+	line = line:sub(cursor)
+	cursor = 1
+	update()
+end
+
+-- Returns a string of UTF-8 text from the clipboard (or the primary selection)
+function get_clipboard(clip)
+	if platform == 'linux' then
+		local res = utils.subprocess({ args = {
+			'xclip', '-selection', clip and 'clipboard' or 'primary', '-out'
+		} })
+		if not res.error then
+			return res.stdout
+		end
+	elseif platform == 'windows' then
+		local res = utils.subprocess({ args = {
+			'powershell', '-NoProfile', '-Command', [[& {
+				Trap {
+					Write-Error -ErrorRecord $_
+					Exit 1
+				}
+
+				$clip = ""
+				if (Get-Command "Get-Clipboard" -errorAction SilentlyContinue) {
+					$clip = Get-Clipboard -Raw -Format Text -TextFormatType UnicodeText
+				} else {
+					Add-Type -AssemblyName PresentationCore
+					$clip = [Windows.Clipboard]::GetText()
+				}
+
+				$clip = $clip -Replace "`r",""
+				$u8clip = [System.Text.Encoding]::UTF8.GetBytes($clip)
+				[Console]::OpenStandardOutput().Write($u8clip, 0, $u8clip.Length)
+			}]]
+		} })
+		if not res.error then
+			return res.stdout
+		end
+	elseif platform == 'macos' then
+		local res = utils.subprocess({ args = { 'pbpaste' } })
+		if not res.error then
+			return res.stdout
+		end
+	end
+	return ''
+end
+
+-- Paste text from the window-system's clipboard. 'clip' determines whether the
+-- clipboard or the primary selection buffer is used (on X11 only.)
+function paste(clip)
+	local text = get_clipboard(clip)
+	local before_cur = line:sub(1, cursor - 1)
+	local after_cur = line:sub(cursor)
+	line = before_cur .. text .. after_cur
+	cursor = cursor + text:len()
+	update()
+end
+
+-- The REPL has pretty specific requirements for key bindings that aren't
+-- really satisified by any of mpv's helper methods, since they must be in
+-- their own input section, but they must also raise events on key-repeat.
+-- Hence, this function manually creates an input section and puts a list of
+-- bindings in it.
+function add_repl_bindings(bindings)
+	local cfg = ''
+	for i, binding in ipairs(bindings) do
+		local key = binding[1]
+		local fn = binding[2]
+		local name = '__repl_binding_' .. i
+		mp.add_key_binding(nil, name, fn, 'repeatable')
+		cfg = cfg .. key .. ' script-binding ' .. mp.script_name .. '/' ..
+		      name .. '\n'
+	end
+	mp.commandv('define-section', 'repl-input', cfg, 'force')
+end
+
+-- Mapping from characters to mpv key names
+local binding_name_map = {
+	[' '] = 'SPACE',
+	['#'] = 'SHARP',
+}
+
+-- List of input bindings. This is a weird mashup between common GUI text-input
+-- bindings and readline bindings.
+local bindings = {
+	{ 'esc',         function() set_active(false) end       },
+	{ 'bs',          handle_backspace                       },
+	{ 'shift+bs',    handle_backspace                       },
+	{ 'del',         handle_del                             },
+	{ 'shift+del',   handle_del                             },
+	{ 'ins',         handle_ins                             },
+	{ 'left',        function() prev_char() end             },
+	{ 'right',       function() next_char() end             },
+	{ 'up',          function() clear() end        },
+	{ 'home',        go_home                                },
+	{ 'end',         go_end                                 },
+	{ 'ctrl+c',      clear                                  },
+	{ 'ctrl+d',      maybe_exit                             },
+	{ 'ctrl+k',      del_to_eol                             },
+	{ 'ctrl+l',      clear_log_buffer                       },
+	{ 'ctrl+u',      del_to_start                           },
+	{ 'ctrl+v',      function() paste(true) end             },
+	{ 'meta+v',      function() paste(true) end             },
+}
+-- Add bindings for all the printable US-ASCII characters from ' ' to '~'
+-- inclusive. Note, this is a pretty hacky way to do text input. mpv's input
+-- system was designed for single-key key bindings rather than text input, so
+-- things like dead-keys and non-ASCII input won't work. This is probably okay
+-- though, since all mpv's commands and properties can be represented in ASCII.
+for b = (' '):byte(), ('~'):byte() do
+	local c = string.char(b)
+	local binding = binding_name_map[c] or c
+	bindings[#bindings + 1] = {binding, function() handle_char_input(c) end}
+end
+add_repl_bindings(bindings)
+
+-- Add a script-message to show the REPL and fill it with the provided text
+mp.register_script_message('type', function(text)
+	show_and_type(text)
+end)
+
+mp.add_key_binding('enter', handle_enter)
+mp.add_key_binding('kp_enter', handle_enter)