enhance unicode width detection, adds test 4 utf8
Changes to be committed: modified: src/ltui/label.lua new file: tests/utf8dialog.lua
This commit is contained in:
laelnasan
@@ -119,6 +119,113 @@ function label:textattr_val()
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return value
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return value
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end
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end
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local function _unicode_width(str, idx)
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-- based on Markus Kuhn's implementation of wcswidth()
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-- https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
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local non_spacing = {
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{0x0300, 0x036F}, {0x0483, 0x0486}, {0x0488, 0x0489},
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{0x0591, 0x05BD}, {0x05BF, 0x05BF}, {0x05C1, 0x05C2},
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{0x05C4, 0x05C5}, {0x05C7, 0x05C7}, {0x0600, 0x0603},
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{0x0610, 0x0615}, {0x064B, 0x065E}, {0x0670, 0x0670},
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{0x06D6, 0x06E4}, {0x06E7, 0x06E8}, {0x06EA, 0x06ED},
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{0x070F, 0x070F}, {0x0711, 0x0711}, {0x0730, 0x074A},
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{0x07A6, 0x07B0}, {0x07EB, 0x07F3}, {0x0901, 0x0902},
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{0x093C, 0x093C}, {0x0941, 0x0948}, {0x094D, 0x094D},
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{0x0951, 0x0954}, {0x0962, 0x0963}, {0x0981, 0x0981},
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{0x09BC, 0x09BC}, {0x09C1, 0x09C4}, {0x09CD, 0x09CD},
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{0x09E2, 0x09E3}, {0x0A01, 0x0A02}, {0x0A3C, 0x0A3C},
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{0x0A41, 0x0A42}, {0x0A47, 0x0A48}, {0x0A4B, 0x0A4D},
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{0x0A70, 0x0A71}, {0x0A81, 0x0A82}, {0x0ABC, 0x0ABC},
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{0x0AC1, 0x0AC5}, {0x0AC7, 0x0AC8}, {0x0ACD, 0x0ACD},
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{0x0AE2, 0x0AE3}, {0x0B01, 0x0B01}, {0x0B3C, 0x0B3C},
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{0x0B3F, 0x0B3F}, {0x0B41, 0x0B43}, {0x0B4D, 0x0B4D},
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{0x0B56, 0x0B56}, {0x0B82, 0x0B82}, {0x0BC0, 0x0BC0},
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{0x0BCD, 0x0BCD}, {0x0C3E, 0x0C40}, {0x0C46, 0x0C48},
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{0x0C4A, 0x0C4D}, {0x0C55, 0x0C56}, {0x0CBC, 0x0CBC},
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{0x0CBF, 0x0CBF}, {0x0CC6, 0x0CC6}, {0x0CCC, 0x0CCD},
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{0x0CE2, 0x0CE3}, {0x0D41, 0x0D43}, {0x0D4D, 0x0D4D},
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{0x0DCA, 0x0DCA}, {0x0DD2, 0x0DD4}, {0x0DD6, 0x0DD6},
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{0x0E31, 0x0E31}, {0x0E34, 0x0E3A}, {0x0E47, 0x0E4E},
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{0x0EB1, 0x0EB1}, {0x0EB4, 0x0EB9}, {0x0EBB, 0x0EBC},
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{0x0EC8, 0x0ECD}, {0x0F18, 0x0F19}, {0x0F35, 0x0F35},
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{0x0F37, 0x0F37}, {0x0F39, 0x0F39}, {0x0F71, 0x0F7E},
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{0x0F80, 0x0F84}, {0x0F86, 0x0F87}, {0x0F90, 0x0F97},
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{0x0F99, 0x0FBC}, {0x0FC6, 0x0FC6}, {0x102D, 0x1030},
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{0x1032, 0x1032}, {0x1036, 0x1037}, {0x1039, 0x1039},
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{0x1058, 0x1059}, {0x1160, 0x11FF}, {0x135F, 0x135F},
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{0x1712, 0x1714}, {0x1732, 0x1734}, {0x1752, 0x1753},
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{0x1772, 0x1773}, {0x17B4, 0x17B5}, {0x17B7, 0x17BD},
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{0x17C6, 0x17C6}, {0x17C9, 0x17D3}, {0x17DD, 0x17DD},
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{0x180B, 0x180D}, {0x18A9, 0x18A9}, {0x1920, 0x1922},
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{0x1927, 0x1928}, {0x1932, 0x1932}, {0x1939, 0x193B},
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{0x1A17, 0x1A18}, {0x1B00, 0x1B03}, {0x1B34, 0x1B34},
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{0x1B36, 0x1B3A}, {0x1B3C, 0x1B3C}, {0x1B42, 0x1B42},
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{0x1B6B, 0x1B73}, {0x1DC0, 0x1DCA}, {0x1DFE, 0x1DFF},
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{0x200B, 0x200F}, {0x202A, 0x202E}, {0x2060, 0x2063},
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{0x206A, 0x206F}, {0x20D0, 0x20EF}, {0x302A, 0x302F},
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{0x3099, 0x309A}, {0xA806, 0xA806}, {0xA80B, 0xA80B},
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{0xA825, 0xA826}, {0xFB1E, 0xFB1E}, {0xFE00, 0xFE0F},
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{0xFE20, 0xFE23}, {0xFEFF, 0xFEFF}, {0xFFF9, 0xFFFB},
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{0x10A01, 0x10A03}, {0x10A05, 0x10A06}, {0x10A0C, 0x10A0F},
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{0x10A38, 0x10A3A}, {0x10A3F, 0x10A3F}, {0x1D167, 0x1D169},
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{0x1D173, 0x1D182}, {0x1D185, 0x1D18B}, {0x1D1AA, 0x1D1AD},
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{0x1D242, 0x1D244}, {0xE0001, 0xE0001}, {0xE0020, 0xE007F},
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{0xE0100, 0xE01EF},
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}
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idx = idx or 1
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-- turn codepoint into unicode
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local c = str:byte(idx)
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local seq = c < 0x80 and 1 or c < 0xE0 and 2 or c < 0xF0 and 3 or
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c < 0xF8 and 4 or error("invalid UTF-8 sequence")
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local val = seq == 1 and c or bit.band(c, (2^(8 - seq) - 1))
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for aux = 2, seq do
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c = str:byte(idx + aux - 1)
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val = val * 2 ^ 6 + bit.band(c, 0x3F)
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end
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-- test for 8-bit control characters
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if val == 0 then return 0 end
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if val < 32 or (val >= 0x7f and val < 0xa0) then
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return -1
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end
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-- binary search in table of non-spacing characters
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local min, max = 1, #non_spacing
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if val >= non_spacing[1][1] and val <= non_spacing[max][2] then
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while max >= min do
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local mid = math.floor((min + max) / 2)
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if val > non_spacing[mid][2] then
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min = mid + 1
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elseif val < non_spacing[mid][1] then
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max = mid - 1
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else
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return 0
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end
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end
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end
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if val >= 0x1100 and (val <= 0x115f or -- Hangul Jamo init. consonants
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val == 0x2329 or val == 0x232a or
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(val >= 0x2e80 and val <= 0xa4cf and
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val ~= 0x303f) or -- CJK ... Yi
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(val >= 0xac00 and val <= 0xd7a3) or -- Hangul Syllables
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(val >= 0xf900 and val <= 0xfaff) or -- CJK Compatibility Ideographs
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(val >= 0xfe10 and val <= 0xfe19) or -- Vertical forms
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(val >= 0xfe30 and val <= 0xfe6f) or -- CJK Compatibility Forms
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(val >= 0xff00 and val <= 0xff60) or -- Fullwidth Forms
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(val >= 0xffe0 and val <= 0xffe6) or
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(val >= 0x20000 and val <= 0x2fffd) or
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(val >= 0x30000 and val <= 0x3fffd)) then
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return 2
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end
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return 1
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end
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-- split text by width
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-- split text by width
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function label:splitext(text, width)
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function label:splitext(text, width)
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@@ -134,7 +241,7 @@ function label:splitext(text, width)
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local size = 0
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local size = 0
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for i = 1, #line do
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for i = 1, #line do
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if bit.band(line:byte(i), 0xc0) ~= 0x80 then
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if bit.band(line:byte(i), 0xc0) ~= 0x80 then
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size = size + 1
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size = size + _unicode_width(line, i)
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if size > width then
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if size > width then
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table.insert(result, line:sub(1, i - 1))
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table.insert(result, line:sub(1, i - 1))
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line = line:sub(i)
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line = line:sub(i)
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138
tests/utf8dialog.lua
Normal file
138
tests/utf8dialog.lua
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@@ -0,0 +1,138 @@
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--!A cross-platform terminal ui library based on Lua
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--
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-- Licensed to the Apache Software Foundation (ASF) under one
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-- or more contributor license agreements. See the NOTICE file
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-- distributed with this work for additional information
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-- regarding copyright ownership. The ASF licenses this file
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-- to you under the Apache License, Version 2.0 (the
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-- "License"); you may not use this file except in compliance
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-- with the License. You may obtain a copy of the License at
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--
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-- http://www.apache.org/licenses/LICENSE-2.0
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--
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-- Unless required by applicable law or agreed to in writing, software
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-- distributed under the License is distributed on an "AS IS" BASIS,
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-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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-- See the License for the specific language governing permissions and
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-- limitations under the License.
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--
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-- Copyright (C) 2015-2020, TBOOX Open Source Group.
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--
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-- @author ruki, laelnasan
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-- @file utf8dialog.lua
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--
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require("tests/load")
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-- requires
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local ltui = require("ltui")
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local label = ltui.label
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local button = ltui.button
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local application = ltui.application
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local event = ltui.event
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local rect = ltui.rect
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local boxdialog = ltui.boxdialog
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local textdialog = ltui.textdialog
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local inputdialog = ltui.inputdialog
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-- the demo application
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local demo = application()
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-- init demo
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function demo:init()
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-- init name
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application.init(self, "demo")
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-- init background
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self:background_set("blue")
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-- init main dialog
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self:insert(self:dialog_main())
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-- init input dialog
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self:insert(self:dialog_input(), {centerx = true, centery = true})
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-- init tips dialog
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self:insert(self:dialog_tips(), {centerx = true, centery = true})
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end
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-- main dialog
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function demo:dialog_main()
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local dialog_main = self._DIALOG_MAIN
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if not dialog_main then
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dialog_main = boxdialog:new("dialog.main", rect {1, 1, self:width() - 1, self:height() - 1}, "main dialog")
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dialog_main:text():text_set([[LTUI是一个基于lua的跨平台字符终端UI界面库。
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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。]])
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dialog_main:button_add("tips", "< ☝ Tips >", function (v) self:view("dialog.tips"):show(true, {focused = true}) end)
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dialog_main:button_add("input", "< ☺ Input >", function (v) self:view("dialog.input"):show(true, {focused = true}) end)
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dialog_main:button_add("help", "< ☕Help >", function (v) self:insert(self:dialog_help()) end)
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dialog_main:button_add("quit", "< ☠ Quit >", "cm_quit")
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self._DIALOG_MAIN = dialog_main
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end
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return dialog_main
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end
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-- help dialog
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function demo:dialog_help()
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local dialog_help = self._DIALOG_HELP
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if not dialog_help then
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dialog_help = textdialog:new("dialog.help", rect {1, 1, self:width() - 1, self:height() - 1}, "README")
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dialog_help:option_set("scrollable", true)
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local helptext = nil
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local file = io.open("./LICENSE.md", 'r')
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if file then
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helptext = file:read("*a")
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file:close()
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end
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if helptext then
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dialog_help:text():text_set(helptext)
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end
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dialog_help:button_add("exit", "< Exit >", function (v) self:remove(dialog_help) end)
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self._DIALOG_HELP = dialog_help
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end
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return dialog_help
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end
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-- input dialog
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function demo:dialog_input()
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local dialog_input = self._DIALOG_INPUT
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if not dialog_input then
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dialog_input = inputdialog:new("dialog.input", rect {0, 0, 50, 8}):background_set(self:dialog_main():frame():background())
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dialog_input:frame():background_set("cyan")
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dialog_input:text():text_set("please input text:"):textattr_set("red")
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dialog_input:button_add("no", "< No >", function (v) dialog_input:show(false) end)
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dialog_input:button_add("yes", "< Yes >", function (v)
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self:dialog_main():text():text_set(dialog_input:textedit():text())
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dialog_input:show(false)
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end)
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dialog_input:show(false)
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self._DIALOG_INPUT = dialog_input
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end
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return dialog_input
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end
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-- tips dialog
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function demo:dialog_tips()
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local dialog_tips = self._DIALOG_TIPS
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if not dialog_tips then
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dialog_tips = textdialog:new("dialog.tips", rect {0, 0, 50, 8}):background_set(self:dialog_main():frame():background())
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dialog_tips:frame():background_set("cyan")
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dialog_tips:text():text_set("hello ltui! (https://tboox.org)\nA cross-platform terminal ui library based on Lua"):textattr_set("red")
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dialog_tips:button_add("yes", "< Yes >", function (v) dialog_tips:show(false) end)
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dialog_tips:button_add("no", "< No >", function (v) dialog_tips:show(false) end)
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self._DIALOG_TIPS = dialog_tips
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end
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return dialog_tips
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end
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-- on resize
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function demo:on_resize()
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self:dialog_main():bounds_set(rect {1, 1, self:width() - 1, self:height() - 1})
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self:dialog_help():bounds_set(rect {1, 1, self:width() - 1, self:height() - 1})
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self:center(self:dialog_input(), {centerx = true, centery = true})
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self:center(self:dialog_tips(), {centerx = true, centery = true})
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application.on_resize(self)
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end
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-- run demo
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demo:run()
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