450 lines
11 KiB
Lua
450 lines
11 KiB
Lua
local common = {}
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function common.is_utf8_cont(s, offset)
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local byte = s:byte(offset or 1)
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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.merge(a, b)
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local t = {}
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for k, v in pairs(a) do t[k] = v end
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if b then for k, v in pairs(b) do t[k] = v end end
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return t
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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.find_index(tbl, prop)
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for i, o in ipairs(tbl) do
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if o[prop] then return i end
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end
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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.distance(x1, y1, x2, y2)
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return math.sqrt(((x2-x1) ^ 2)+((y2-y1) ^ 2))
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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)(%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 = tonumber(a, 16) or 0xff
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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) * 0xff
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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
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end
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function common.splice(t, at, remove, insert)
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insert = insert or {}
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local offset = #insert - remove
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local old_len = #t
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if offset < 0 then
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for i = at - offset, old_len - offset do
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t[i + offset] = t[i]
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end
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elseif offset > 0 then
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for i = old_len, at, -1 do
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t[i + offset] = t[i]
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end
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end
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for i, item in ipairs(insert) do
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t[at + i - 1] = item
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end
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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, files)
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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, files)
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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, files)
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if type(haystack) == "table" then
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return fuzzy_match_items(haystack, needle, files)
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end
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return system.fuzzy_match(haystack, needle, files)
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end
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function common.fuzzy_match_with_recents(haystack, recents, needle)
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if needle == "" then
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local recents_ext = {}
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for i = 2, #recents do
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table.insert(recents_ext, recents[i])
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end
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table.insert(recents_ext, recents[1])
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local others = common.fuzzy_match(haystack, "", true)
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for i = 1, #others do
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table.insert(recents_ext, others[i])
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end
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return recents_ext
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else
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return fuzzy_match_items(haystack, needle, true)
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end
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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.dir_path_suggest(text)
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local path, name = text:match("^(.-)([^/\\]*)$")
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local files = system.list_dir(path == "" and "." or path) or {}
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local res = {}
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for _, file in ipairs(files) do
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file = path .. file
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local info = system.get_file_info(file)
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if info and info.type == "dir" and file:lower():find(text:lower(), nil, true) == 1 then
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table.insert(res, file)
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end
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end
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return res
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end
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function common.dir_list_suggest(text, dir_list)
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local path, name = text:match("^(.-)([^/\\]*)$")
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local res = {}
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for _, dir_path in ipairs(dir_list) do
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if dir_path:lower():find(text:lower(), nil, true) == 1 then
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table.insert(res, dir_path)
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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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function common.serialize(val)
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if type(val) == "string" then
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return string.format("%q", val)
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elseif type(val) == "table" then
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local t = {}
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for k, v in pairs(val) do
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table.insert(t, "[" .. common.serialize(k) .. "]=" .. common.serialize(v))
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end
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return "{" .. table.concat(t, ",") .. "}"
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end
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return tostring(val)
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end
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function common.basename(path)
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-- a path should never end by / or \ except if it is '/' (unix root) or
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-- 'X:\' (windows drive)
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return path:match("[^\\/]+$") or path
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end
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-- can return nil if there is no directory part in the path
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function common.dirname(path)
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return path:match("(.+)[\\/][^\\/]+$")
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end
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function common.home_encode(text)
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if HOME and string.find(text, HOME, 1, true) == 1 then
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local dir_pos = #HOME + 1
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-- ensure we don't replace if the text is just "$HOME" or "$HOME/" so
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-- it must have a "/" following the $HOME and some characters following.
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if string.find(text, PATHSEP, dir_pos, true) == dir_pos and #text > dir_pos then
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return "~" .. text:sub(dir_pos)
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end
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end
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return text
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end
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function common.home_encode_list(paths)
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local t = {}
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for i = 1, #paths do
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t[i] = common.home_encode(paths[i])
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end
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return t
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end
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function common.home_expand(text)
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return HOME and text:gsub("^~", HOME) or text
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end
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local function split_on_slash(s, sep_pattern)
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local t = {}
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if s:match("^[/\\]") then
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t[#t + 1] = ""
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end
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for fragment in string.gmatch(s, "([^/\\]+)") do
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t[#t + 1] = fragment
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end
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return t
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end
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-- The filename argument given to the function is supposed to
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-- come from system.absolute_path and as such should be an
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-- absolute path without . or .. elements.
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-- This function exists because on Windows the drive letter returned
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-- by system.absolute_path is sometimes with a lower case and sometimes
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-- with an upper case to we normalize to upper case.
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function common.normalize_volume(filename)
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if not filename then return end
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if PATHSEP == '\\' then
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local drive, rem = filename:match('^([a-zA-Z]:\\)(.*)')
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if drive then
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return drive:upper() .. rem
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end
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end
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return filename
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end
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function common.normalize_path(filename)
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if not filename then return end
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local volume
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if PATHSEP == '\\' then
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filename = filename:gsub('[/\\]', '\\')
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local drive, rem = filename:match('^([a-zA-Z]:\\)(.*)')
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if drive then
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volume, filename = drive:upper(), rem
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else
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drive, rem = filename:match('^(\\\\[^\\]+\\[^\\]+\\)(.*)')
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if drive then
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volume, filename = drive, rem
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end
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end
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else
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local relpath = filename:match('^/(.+)')
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if relpath then
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volume, filename = "/", relpath
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end
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end
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local parts = split_on_slash(filename, PATHSEP)
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local accu = {}
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for _, part in ipairs(parts) do
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if part == '..' then
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if #accu > 0 and accu[#accu] ~= ".." then
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table.remove(accu)
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elseif volume then
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error("invalid path " .. volume .. filename)
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else
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table.insert(accu, part)
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end
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elseif part ~= '.' then
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table.insert(accu, part)
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end
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end
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local npath = table.concat(accu, PATHSEP)
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return (volume or "") .. (npath == "" and PATHSEP or npath)
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end
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function common.path_belongs_to(filename, path)
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return string.find(filename, path .. PATHSEP, 1, true) == 1
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end
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function common.relative_path(ref_dir, dir)
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local drive_pattern = "^(%a):\\"
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local drive, ref_drive = dir:match(drive_pattern), ref_dir:match(drive_pattern)
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if drive and ref_drive and drive ~= ref_drive then
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-- Windows, different drives, system.absolute_path fails for C:\..\D:\
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return dir
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end
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local ref_ls = split_on_slash(ref_dir)
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local dir_ls = split_on_slash(dir)
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local i = 1
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while i <= #ref_ls do
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if dir_ls[i] ~= ref_ls[i] then
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break
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end
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i = i + 1
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end
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local ups = ""
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for k = i, #ref_ls do
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ups = ups .. ".." .. PATHSEP
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end
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local rel_path = ups .. table.concat(dir_ls, PATHSEP, i)
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return rel_path ~= "" and rel_path or "."
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end
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function common.mkdirp(path)
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local stat = system.get_file_info(path)
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if stat and stat.type then
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return false, "path exists", path
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end
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local subdirs = {}
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while path and path ~= "" do
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local success_mkdir = system.mkdir(path)
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if success_mkdir then break end
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local updir, basedir = path:match("(.*)[/\\](.+)$")
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table.insert(subdirs, 1, basedir or path)
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path = updir
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end
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for _, dirname in ipairs(subdirs) do
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path = path and path .. PATHSEP .. dirname or dirname
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if not system.mkdir(path) then
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return false, "cannot create directory", path
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end
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end
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return true
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end
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function common.rm(path, recursively)
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local stat = system.get_file_info(path)
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if not stat or (stat.type ~= "file" and stat.type ~= "dir") then
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return false, "invalid path given", path
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end
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if stat.type == "file" then
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local removed, error = os.remove(path)
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if not removed then
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return false, error, path
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end
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else
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local contents = system.list_dir(path)
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if #contents > 0 and not recursively then
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return false, "directory is not empty", path
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end
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for _, item in pairs(contents) do
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local item_path = path .. PATHSEP .. item
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local item_stat = system.get_file_info(item_path)
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if not item_stat then
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return false, "invalid file encountered", item_path
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end
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if item_stat.type == "dir" then
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local deleted, error, ipath = common.rm(item_path, recursively)
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if not deleted then
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return false, error, ipath
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end
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elseif item_stat.type == "file" then
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local removed, error = os.remove(item_path)
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if not removed then
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return false, error, item_path
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end
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end
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end
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local removed, error = system.rmdir(path)
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if not removed then
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return false, error, path
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end
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end
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return true
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end
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return common
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