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colorspec.from_string(): return nothing if invalid

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This commit is contained in:
Lars Mueller 2021-11-13 23:57:32 +01:00
parent aac9eea46e
commit e048fb3b03
2 changed files with 20 additions and 11 deletions
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27
minetest/colorspec.lua
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@ -203,22 +203,29 @@ function colorspec.from_string(string)
if not number then if not number then
local name, alpha_text = string:match("^([a-z]+)" .. hex .. "$") local name, alpha_text = string:match("^([a-z]+)" .. hex .. "$")
if name then if name then
assert(alpha_text:len() == 2) if alpha_text:len() ~= 2 then
number = assert(named_colors[name]) return
end
number = named_colors[name]
if not number then
return
end
alpha = tonumber(alpha_text, 16) alpha = tonumber(alpha_text, 16)
end end
end end
if number then if number then
return colorspec.from_number(number * 0x100 + alpha) return colorspec.from_number_rgba(number * 0x100 + alpha)
end end
local hex_text = string:match("^" .. hex .. "$") local hex_text = string:match("^" .. hex .. "$")
assert(hex_text, "invalid colorstring") if not hex_text then
return
end
local len, num = hex_text:len(), tonumber(hex_text, 16) local len, num = hex_text:len(), tonumber(hex_text, 16)
if len == 8 then if len == 8 then
return colorspec.from_number(num) return colorspec.from_number_rgba(num)
end end
if len == 6 then if len == 6 then
return colorspec.from_number(num * 0x100 + 0xFF) return colorspec.from_number_rgba(num * 0x100 + 0xFF)
end end
if len == 4 then if len == 4 then
return colorspec.from_table{ return colorspec.from_table{
@ -235,8 +242,6 @@ function colorspec.from_string(string)
r = (floor(num / (16 ^ 2)) % 16) * 17 r = (floor(num / (16 ^ 2)) % 16) * 17
} }
end end
-- TODO return nil
error"invalid colorstring"
end end
colorspec.from_text = colorspec.from_string colorspec.from_text = colorspec.from_string
@ -308,5 +313,9 @@ function colorspec:to_number()
end end
colorspec_to_colorstring = minetest.colorspec_to_colorstring or function(spec) colorspec_to_colorstring = minetest.colorspec_to_colorstring or function(spec)
return colorspec.from_any(spec):to_string() local color = colorspec.from_any(spec)
if not color then
return nil
end
return color:to_string()
end end

4
test.lua
View File

@ -331,7 +331,7 @@ assert(minetest.luon:read_string(minetest.luon:write_string(ItemStack"")))
local colorspec = minetest.colorspec local colorspec = minetest.colorspec
local function test_from_string(string, number) local function test_from_string(string, number)
local spec = colorspec.from_string(string) local spec = colorspec.from_string(string)
local expected = colorspec.from_number(number) local expected = colorspec.from_number_rgba(number)
assertdump(table.equals(spec, expected), {expected = expected, actual = spec}) assertdump(table.equals(spec, expected), {expected = expected, actual = spec})
end end
local spec = colorspec.from_number(0xDDCCBBAA) local spec = colorspec.from_number(0xDDCCBBAA)
@ -341,7 +341,7 @@ test_from_string("aliceblue#42", 0xf0f8ff42)
test_from_string("#333", 0x333333FF) test_from_string("#333", 0x333333FF)
test_from_string("#694269", 0x694269FF) test_from_string("#694269", 0x694269FF)
test_from_string("#11223344", 0x11223344) test_from_string("#11223344", 0x11223344)
assert(colorspec.from_string"#694269":to_string() == "694269") assert(colorspec.from_string"#694269":to_string() == "#694269")
-- Persistence -- Persistence
local function test_logfile(reference_strings) local function test_logfile(reference_strings)