diff --git a/src/ltui/label.lua b/src/ltui/label.lua index 58215b6..c8ed62b 100644 --- a/src/ltui/label.lua +++ b/src/ltui/label.lua @@ -119,6 +119,113 @@ function label:textattr_val() return value end +local function _unicode_width(str, idx) + -- based on Markus Kuhn's implementation of wcswidth() + -- https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c + local non_spacing = { + {0x0300, 0x036F}, {0x0483, 0x0486}, {0x0488, 0x0489}, + {0x0591, 0x05BD}, {0x05BF, 0x05BF}, {0x05C1, 0x05C2}, + {0x05C4, 0x05C5}, {0x05C7, 0x05C7}, {0x0600, 0x0603}, + {0x0610, 0x0615}, {0x064B, 0x065E}, {0x0670, 0x0670}, + {0x06D6, 0x06E4}, {0x06E7, 0x06E8}, {0x06EA, 0x06ED}, + {0x070F, 0x070F}, {0x0711, 0x0711}, {0x0730, 0x074A}, + {0x07A6, 0x07B0}, {0x07EB, 0x07F3}, {0x0901, 0x0902}, + {0x093C, 0x093C}, {0x0941, 0x0948}, {0x094D, 0x094D}, + {0x0951, 0x0954}, {0x0962, 0x0963}, {0x0981, 0x0981}, + {0x09BC, 0x09BC}, {0x09C1, 0x09C4}, {0x09CD, 0x09CD}, + {0x09E2, 0x09E3}, {0x0A01, 0x0A02}, {0x0A3C, 0x0A3C}, + {0x0A41, 0x0A42}, {0x0A47, 0x0A48}, {0x0A4B, 0x0A4D}, + {0x0A70, 0x0A71}, {0x0A81, 0x0A82}, {0x0ABC, 0x0ABC}, + {0x0AC1, 0x0AC5}, {0x0AC7, 0x0AC8}, {0x0ACD, 0x0ACD}, + {0x0AE2, 0x0AE3}, {0x0B01, 0x0B01}, {0x0B3C, 0x0B3C}, + {0x0B3F, 0x0B3F}, {0x0B41, 0x0B43}, {0x0B4D, 0x0B4D}, + {0x0B56, 0x0B56}, {0x0B82, 0x0B82}, {0x0BC0, 0x0BC0}, + {0x0BCD, 0x0BCD}, {0x0C3E, 0x0C40}, {0x0C46, 0x0C48}, + {0x0C4A, 0x0C4D}, {0x0C55, 0x0C56}, {0x0CBC, 0x0CBC}, + {0x0CBF, 0x0CBF}, {0x0CC6, 0x0CC6}, {0x0CCC, 0x0CCD}, + {0x0CE2, 0x0CE3}, {0x0D41, 0x0D43}, {0x0D4D, 0x0D4D}, + {0x0DCA, 0x0DCA}, {0x0DD2, 0x0DD4}, {0x0DD6, 0x0DD6}, + {0x0E31, 0x0E31}, {0x0E34, 0x0E3A}, {0x0E47, 0x0E4E}, + {0x0EB1, 0x0EB1}, {0x0EB4, 0x0EB9}, {0x0EBB, 0x0EBC}, + {0x0EC8, 0x0ECD}, {0x0F18, 0x0F19}, {0x0F35, 0x0F35}, + {0x0F37, 0x0F37}, {0x0F39, 0x0F39}, {0x0F71, 0x0F7E}, + {0x0F80, 0x0F84}, {0x0F86, 0x0F87}, {0x0F90, 0x0F97}, + {0x0F99, 0x0FBC}, {0x0FC6, 0x0FC6}, {0x102D, 0x1030}, + {0x1032, 0x1032}, {0x1036, 0x1037}, {0x1039, 0x1039}, + {0x1058, 0x1059}, {0x1160, 0x11FF}, {0x135F, 0x135F}, + {0x1712, 0x1714}, {0x1732, 0x1734}, {0x1752, 0x1753}, + {0x1772, 0x1773}, {0x17B4, 0x17B5}, {0x17B7, 0x17BD}, + {0x17C6, 0x17C6}, {0x17C9, 0x17D3}, {0x17DD, 0x17DD}, + {0x180B, 0x180D}, {0x18A9, 0x18A9}, {0x1920, 0x1922}, + {0x1927, 0x1928}, {0x1932, 0x1932}, {0x1939, 0x193B}, + {0x1A17, 0x1A18}, {0x1B00, 0x1B03}, {0x1B34, 0x1B34}, + {0x1B36, 0x1B3A}, {0x1B3C, 0x1B3C}, {0x1B42, 0x1B42}, + {0x1B6B, 0x1B73}, {0x1DC0, 0x1DCA}, {0x1DFE, 0x1DFF}, + {0x200B, 0x200F}, {0x202A, 0x202E}, {0x2060, 0x2063}, + {0x206A, 0x206F}, {0x20D0, 0x20EF}, {0x302A, 0x302F}, + {0x3099, 0x309A}, {0xA806, 0xA806}, {0xA80B, 0xA80B}, + {0xA825, 0xA826}, {0xFB1E, 0xFB1E}, {0xFE00, 0xFE0F}, + {0xFE20, 0xFE23}, {0xFEFF, 0xFEFF}, {0xFFF9, 0xFFFB}, + {0x10A01, 0x10A03}, {0x10A05, 0x10A06}, {0x10A0C, 0x10A0F}, + {0x10A38, 0x10A3A}, {0x10A3F, 0x10A3F}, {0x1D167, 0x1D169}, + {0x1D173, 0x1D182}, {0x1D185, 0x1D18B}, {0x1D1AA, 0x1D1AD}, + {0x1D242, 0x1D244}, {0xE0001, 0xE0001}, {0xE0020, 0xE007F}, + {0xE0100, 0xE01EF}, + } + + idx = idx or 1 + + -- turn codepoint into unicode + local c = str:byte(idx) + local seq = c < 0x80 and 1 or c < 0xE0 and 2 or c < 0xF0 and 3 or + c < 0xF8 and 4 or error("invalid UTF-8 sequence") + local val = seq == 1 and c or bit.band(c, (2^(8 - seq) - 1)) + + for aux = 2, seq do + c = str:byte(idx + aux - 1) + val = val * 2 ^ 6 + bit.band(c, 0x3F) + end + + -- test for 8-bit control characters + if val == 0 then return 0 end + + if val < 32 or (val >= 0x7f and val < 0xa0) then + return -1 + end + + -- binary search in table of non-spacing characters + local min, max = 1, #non_spacing + if val >= non_spacing[1][1] and val <= non_spacing[max][2] then + while max >= min do + local mid = math.floor((min + max) / 2) + if val > non_spacing[mid][2] then + min = mid + 1 + elseif val < non_spacing[mid][1] then + max = mid - 1 + else + return 0 + end + end + end + + if val >= 0x1100 and (val <= 0x115f or -- Hangul Jamo init. consonants + val == 0x2329 or val == 0x232a or + (val >= 0x2e80 and val <= 0xa4cf and + val ~= 0x303f) or -- CJK ... Yi + (val >= 0xac00 and val <= 0xd7a3) or -- Hangul Syllables + (val >= 0xf900 and val <= 0xfaff) or -- CJK Compatibility Ideographs + (val >= 0xfe10 and val <= 0xfe19) or -- Vertical forms + (val >= 0xfe30 and val <= 0xfe6f) or -- CJK Compatibility Forms + (val >= 0xff00 and val <= 0xff60) or -- Fullwidth Forms + (val >= 0xffe0 and val <= 0xffe6) or + (val >= 0x20000 and val <= 0x2fffd) or + (val >= 0x30000 and val <= 0x3fffd)) then + return 2 + end + + return 1 +end + -- split text by width function label:splitext(text, width) @@ -134,7 +241,7 @@ function label:splitext(text, width) local size = 0 for i = 1, #line do if bit.band(line:byte(i), 0xc0) ~= 0x80 then - size = size + 1 + size = size + _unicode_width(line, i) if size > width then table.insert(result, line:sub(1, i - 1)) line = line:sub(i) diff --git a/tests/utf8dialog.lua b/tests/utf8dialog.lua new file mode 100644 index 0000000..c4ce4bb --- /dev/null +++ b/tests/utf8dialog.lua @@ -0,0 +1,138 @@ +--!A cross-platform terminal ui library based on Lua +-- +-- Licensed to the Apache Software Foundation (ASF) under one +-- or more contributor license agreements. See the NOTICE file +-- distributed with this work for additional information +-- regarding copyright ownership. The ASF licenses this file +-- to you under the Apache License, Version 2.0 (the +-- "License"); you may not use this file except in compliance +-- with the License. You may obtain a copy of the License at +-- +-- http://www.apache.org/licenses/LICENSE-2.0 +-- +-- Unless required by applicable law or agreed to in writing, software +-- distributed under the License is distributed on an "AS IS" BASIS, +-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +-- See the License for the specific language governing permissions and +-- limitations under the License. +-- +-- Copyright (C) 2015-2020, TBOOX Open Source Group. +-- +-- @author ruki, laelnasan +-- @file utf8dialog.lua +-- +require("tests/load") + +-- requires +local ltui = require("ltui") +local label = ltui.label +local button = ltui.button +local application = ltui.application +local event = ltui.event +local rect = ltui.rect +local boxdialog = ltui.boxdialog +local textdialog = ltui.textdialog +local inputdialog = ltui.inputdialog + +-- the demo application +local demo = application() + +-- init demo +function demo:init() + + -- init name + application.init(self, "demo") + + -- init background + self:background_set("blue") + + -- init main dialog + self:insert(self:dialog_main()) + + -- init input dialog + self:insert(self:dialog_input(), {centerx = true, centery = true}) + + -- init tips dialog + self:insert(self:dialog_tips(), {centerx = true, centery = true}) +end + +-- main dialog +function demo:dialog_main() + local dialog_main = self._DIALOG_MAIN + if not dialog_main then + dialog_main = boxdialog:new("dialog.main", rect {1, 1, self:width() - 1, self:height() - 1}, "main dialog") + dialog_main:text():text_set([[LTUI是一个基于lua的跨平台字符终端UI界面库。 +此框架源于xmake中图形化菜单配置的需求，类似linux kernel的menuconf去配置编译参数，因此基于curses和lua实现了一整套跨平台的字符终端ui库。 而样式风格基本上完全参照的kconfig-frontends，当然用户也可以自己定制不同的ui风格。]]) + dialog_main:button_add("tips", "< ☝ Tips >", function (v) self:view("dialog.tips"):show(true, {focused = true}) end) + dialog_main:button_add("input", "< ☺ Input >", function (v) self:view("dialog.input"):show(true, {focused = true}) end) + dialog_main:button_add("help", "< ☕Help >", function (v) self:insert(self:dialog_help()) end) + dialog_main:button_add("quit", "< ☠ Quit >", "cm_quit") + self._DIALOG_MAIN = dialog_main + end + return dialog_main +end + +-- help dialog +function demo:dialog_help() + local dialog_help = self._DIALOG_HELP + if not dialog_help then + dialog_help = textdialog:new("dialog.help", rect {1, 1, self:width() - 1, self:height() - 1}, "README") + dialog_help:option_set("scrollable", true) + local helptext = nil + local file = io.open("./LICENSE.md", 'r') + if file then + helptext = file:read("*a") + file:close() + end + if helptext then + dialog_help:text():text_set(helptext) + end + dialog_help:button_add("exit", "< Exit >", function (v) self:remove(dialog_help) end) + self._DIALOG_HELP = dialog_help + end + return dialog_help +end + +-- input dialog +function demo:dialog_input() + local dialog_input = self._DIALOG_INPUT + if not dialog_input then + dialog_input = inputdialog:new("dialog.input", rect {0, 0, 50, 8}):background_set(self:dialog_main():frame():background()) + dialog_input:frame():background_set("cyan") + dialog_input:text():text_set("please input text:"):textattr_set("red") + dialog_input:button_add("no", "< No >", function (v) dialog_input:show(false) end) + dialog_input:button_add("yes", "< Yes >", function (v) + self:dialog_main():text():text_set(dialog_input:textedit():text()) + dialog_input:show(false) + end) + dialog_input:show(false) + self._DIALOG_INPUT = dialog_input + end + return dialog_input +end + +-- tips dialog +function demo:dialog_tips() + local dialog_tips = self._DIALOG_TIPS + if not dialog_tips then + dialog_tips = textdialog:new("dialog.tips", rect {0, 0, 50, 8}):background_set(self:dialog_main():frame():background()) + dialog_tips:frame():background_set("cyan") + dialog_tips:text():text_set("hello ltui! (https://tboox.org)\nA cross-platform terminal ui library based on Lua"):textattr_set("red") + dialog_tips:button_add("yes", "< Yes >", function (v) dialog_tips:show(false) end) + dialog_tips:button_add("no", "< No >", function (v) dialog_tips:show(false) end) + self._DIALOG_TIPS = dialog_tips + end + return dialog_tips +end + +-- on resize +function demo:on_resize() + self:dialog_main():bounds_set(rect {1, 1, self:width() - 1, self:height() - 1}) + self:dialog_help():bounds_set(rect {1, 1, self:width() - 1, self:height() - 1}) + self:center(self:dialog_input(), {centerx = true, centery = true}) + self:center(self:dialog_tips(), {centerx = true, centery = true}) + application.on_resize(self) +end + +-- run demo +demo:run()