1 files changed, 164 insertions, 0 deletions
diff --git a/player/lua/options.lua b/player/lua/options.lua
new file mode 100644
index 0000000..b05b734
--- /dev/null
+++ b/player/lua/options.lua
@@ -0,0 +1,164 @@
+local msg = require 'mp.msg'
+
+-- converts val to type of desttypeval
+local function typeconv(desttypeval, val)
+    if type(desttypeval) == "boolean" then
+        if val == "yes" then
+            val = true
+        elseif val == "no" then
+            val = false
+        else
+            msg.error("Error: Can't convert '" .. val .. "' to boolean!")
+            val = nil
+        end
+    elseif type(desttypeval) == "number" then
+        if tonumber(val) ~= nil then
+            val = tonumber(val)
+        else
+            msg.error("Error: Can't convert '" .. val .. "' to number!")
+            val = nil
+        end
+    end
+    return val
+end
+
+-- performs a deep-copy of the given option value
+local function opt_copy(val)
+    return val -- no tables currently
+end
+
+-- compares the given option values for equality
+local function opt_equal(val1, val2)
+    return val1 == val2
+end
+
+-- performs a deep-copy of an entire option table
+local function opt_table_copy(opts)
+    local copy = {}
+    for key, value in pairs(opts) do
+        copy[key] = opt_copy(value)
+    end
+    return copy
+end
+
+
+local function read_options(options, identifier, on_update)
+    local option_types = opt_table_copy(options)
+    if identifier == nil then
+        identifier = mp.get_script_name()
+    end
+    msg.debug("reading options for " .. identifier)
+
+    -- read config file
+    local conffilename = "script-opts/" .. identifier .. ".conf"
+    local conffile = mp.find_config_file(conffilename)
+    if conffile == nil then
+        msg.debug(conffilename .. " not found.")
+        conffilename = "lua-settings/" .. identifier .. ".conf"
+        conffile = mp.find_config_file(conffilename)
+        if conffile then
+            msg.warn("lua-settings/ is deprecated, use directory script-opts/")
+        end
+    end
+    local f = conffile and io.open(conffile,"r")
+    if f == nil then
+        -- config not found
+        msg.debug(conffilename .. " not found.")
+    else
+        -- config exists, read values
+        msg.verbose("Opened config file " .. conffilename .. ".")
+        local linecounter = 1
+        for line in f:lines() do
+            if line:sub(#line) == "\r" then
+                line = line:sub(1, #line - 1)
+            end
+            if string.find(line, "#") == 1 then
+
+            else
+                local eqpos = string.find(line, "=")
+                if eqpos == nil then
+
+                else
+                    local key = string.sub(line, 1, eqpos-1)
+                    local val = string.sub(line, eqpos+1)
+
+                    -- match found values with defaults
+                    if option_types[key] == nil then
+                        msg.warn(conffilename..":"..linecounter..
+                            " unknown key '" .. key .. "', ignoring")
+                    else
+                        local convval = typeconv(option_types[key], val)
+                        if convval == nil then
+                            msg.error(conffilename..":"..linecounter..
+                                " error converting value '" .. val ..
+                                "' for key '" .. key .. "'")
+                        else
+                            options[key] = convval
+                        end
+                    end
+                end
+            end
+            linecounter = linecounter + 1
+        end
+        io.close(f)
+    end
+
+    --parse command-line options
+    local prefix = identifier.."-"
+    -- command line options are always applied on top of these
+    local conf_and_default_opts = opt_table_copy(options)
+
+    local function parse_opts(full, options)
+        for key, val in pairs(full) do
+            if string.find(key, prefix, 1, true) == 1 then
+                key = string.sub(key, string.len(prefix)+1)
+
+                -- match found values with defaults
+                if option_types[key] == nil then
+                    msg.warn("script-opts: unknown key " .. key .. ", ignoring")
+                else
+                    local convval = typeconv(option_types[key], val)
+                    if convval == nil then
+                        msg.error("script-opts: error converting value '" .. val ..
+                            "' for key '" .. key .. "'")
+                    else
+                        options[key] = convval
+                    end
+                end
+            end
+        end
+    end
+
+    --initial
+    parse_opts(mp.get_property_native("options/script-opts"), options)
+
+    --runtime updates
+    if on_update then
+        local last_opts = opt_table_copy(options)
+
+        mp.observe_property("options/script-opts", "native", function(name, val)
+            local new_opts = opt_table_copy(conf_and_default_opts)
+            parse_opts(val, new_opts)
+            local changelist = {}
+            for key, val in pairs(new_opts) do
+                if not opt_equal(last_opts[key], val) then
+                    -- copy to user
+                    options[key] = opt_copy(val)
+                    changelist[key] = true
+                end
+            end
+            last_opts = new_opts
+            if next(changelist) ~= nil then
+                on_update(changelist)
+            end
+        end)
+    end
+
+end
+
+-- backwards compatibility with broken read_options export
+_G.read_options = read_options
+
+return {
+    read_options = read_options,
+}