Difference between revisions of "utf8"

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{{newin|[[0.9.2]]|092|type=module}}
 
{{newin|[[0.9.2]]|092|type=module}}
  
This library provides basic support for handling UTF-8 encoded strings. It provides all its functions inside the table returned by <code>require("utf8")</code>. This library does not provide any support for Unicode other than handling UTF-8 encoding. Any operation that needs the meaning of a character, such as character classification, is outside its scope.
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This library provides basic support for handling UTF-8 encoded strings.  
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It provides all its functions inside the table returned by <code>require("utf8")</code>. This library does not provide any support for Unicode other than handling UTF-8 encoding. Any operation that needs the meaning of a character, such as character classification, is outside its scope.
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For detailed usage, see the [http://www.lua.org/manual/5.3/manual.html#6.5 reference manual].
  
 
== Examples ==
 
== Examples ==
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end
 
end
 
</source>
 
</source>
 
== Reference Manual ==
 
For detailed usage, see the [http://www.lua.org/manual/5.3/manual.html#6.5 reference manual].
 
  
 
== See Also ==
 
== See Also ==

Revision as of 09:13, 19 March 2015

Available since LÖVE 0.9.2
This module is not supported in earlier versions.


This library provides basic support for handling UTF-8 encoded strings.

It provides all its functions inside the table returned by require("utf8"). This library does not provide any support for Unicode other than handling UTF-8 encoding. Any operation that needs the meaning of a character, such as character classification, is outside its scope.

For detailed usage, see the reference manual.

Examples

Print text the user writes, and erase it using the UTF-8 module.

local utf8 = require("utf8")
 
function love.load()
    text = "Type away! -- "
 
    -- enable key repeat so backspace can be held down to trigger love.keypressed multiple times.
    love.keyboard.setKeyRepeat(true)
end
 
function love.textinput(t)
    text = text .. t
end
 
function love.keypressed(key)
    if key == "backspace" then
        -- get the byte offset to the last UTF-8 character in the string.
        local byteoffset = utf8.offset(text, -1)
 
        if byteoffset then
            -- remove the last UTF-8 character.
            -- string.sub operates on bytes rather than UTF-8 characters, so we couldn't do string.sub(text, 1, -2).
            text = string.sub(text, 1, byteoffset - 1)
        end
    end
end
 
function love.draw()
    love.graphics.printf(text, 0, 0, love.graphics.getWidth())
end

See Also


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