Love 0.10 setTextInput polyfill for 0.9.2

textinput-polyfill.lua

local ffi = require "ffi"

ffi.cdef [[
typedef struct SDL_Rect
{
	int x, y;
	int w, h;
} SDL_Rect;
void SDL_SetTextInputRect(SDL_Rect *rect);
]]

local sdl
if love.system.getOS() == "Windows" then
	-- you probably won't need this section, I just run love out of my working dirs.
	if love and love.system.getOS() == "Windows" and love.filesystem.isDirectory("bin") then
		sdl = ffi.load("bin/SDL2")
	else
		sdl = ffi.load("SDL2")
	end
else
	sdl = ffi.C
end

local setTextInput = love.keyboard.setTextInput
love.keyboard.setTextInput = function(enable, x, y, w, h)
	if x and y and w and h then
		local r = ffi.new("SDL_Rect[1]")
		r[0].x = x
		r[0].y = y
		r[0].w = w
		r[0].h = h
		sdl.SDL_SetTextInputRect(r)
	end
	setTextInput(enable)
end