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140 lines
3.0 KiB
140 lines
3.0 KiB
local common = {}
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function common.is_utf8_cont(char)
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local byte = char:byte()
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return byte >= 0x80 and byte < 0xc0
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end
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function common.utf8_chars(text)
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return text:gmatch("[\0-\x7f\xc2-\xf4][\x80-\xbf]*")
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end
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function common.clamp(n, lo, hi)
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return math.max(math.min(n, hi), lo)
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end
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function common.round(n)
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return n >= 0 and math.floor(n + 0.5) or math.ceil(n - 0.5)
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end
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function common.lerp(a, b, t)
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if type(a) ~= "table" then
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return a + (b - a) * t
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end
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local res = {}
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for k, v in pairs(b) do
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res[k] = common.lerp(a[k], v, t)
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end
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return res
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end
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function common.color(str)
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local r, g, b, a = str:match("#(%x%x)(%x%x)(%x%x)")
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if r then
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r = tonumber(r, 16)
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g = tonumber(g, 16)
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b = tonumber(b, 16)
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a = 1
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elseif str:match("rgba?%s*%([%d%s%.,]+%)") then
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local f = str:gmatch("[%d.]+")
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r = (f() or 0)
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g = (f() or 0)
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b = (f() or 0)
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a = f() or 1
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else
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error(string.format("bad color string '%s'", str))
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end
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return r, g, b, a * 0xff
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end
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local function compare_score(a, b)
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return a.score > b.score
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end
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local function fuzzy_match_items(items, needle)
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local res = {}
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for _, item in ipairs(items) do
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local score = system.fuzzy_match(tostring(item), needle)
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if score then
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table.insert(res, { text = item, score = score })
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end
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end
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table.sort(res, compare_score)
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for i, item in ipairs(res) do
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res[i] = item.text
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end
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return res
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end
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function common.fuzzy_match(haystack, needle)
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if type(haystack) == "table" then
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return fuzzy_match_items(haystack, needle)
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end
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return system.fuzzy_match(haystack, needle)
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end
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function common.path_suggest(text)
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local path, name = text:match("^(.-)([^/\\]*)$")
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local files = system.list_dir(path == "" and "." or path) or {}
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local res = {}
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for _, file in ipairs(files) do
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file = path .. file
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local info = system.get_file_info(file)
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if info then
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if info.type == "dir" then
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file = file .. PATHSEP
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end
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if file:lower():find(text:lower(), nil, true) == 1 then
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table.insert(res, file)
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end
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end
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end
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return res
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end
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function common.match_pattern(text, pattern, ...)
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if type(pattern) == "string" then
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return text:find(pattern, ...)
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end
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for _, p in ipairs(pattern) do
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local s, e = common.match_pattern(text, p, ...)
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if s then return s, e end
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end
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return false
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end
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function common.draw_text(font, color, text, align, x,y,w,h)
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local tw, th = font:get_width(text), font:get_height(text)
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if align == "center" then
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x = x + (w - tw) / 2
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elseif align == "right" then
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x = x + (w - tw)
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end
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y = common.round(y + (h - th) / 2)
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return renderer.draw_text(font, text, x, y, color), y + th
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end
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function common.bench(name, fn, ...)
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local start = system.get_time()
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local res = fn(...)
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local t = system.get_time() - start
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local ms = t * 1000
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local per = (t / (1 / 60)) * 100
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print(string.format("*** %-16s : %8.3fms %6.2f%%", name, ms, per))
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return res
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end
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return common
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