add utf8dialog

3 files changed, 268 insertions, 4 deletions

diff --git a/tests/ui/utf8dialog.lua b/tests/ui/utf8dialog.lua
new file mode 100644
index 000000000..e7de3a075
--- /dev/null
+++ b/tests/ui/utf8dialog.lua
@@ -0,0 +1,140 @@
+--!A cross-platform build utility 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        inputdialog.lua
+--
+
+-- imports
+import("core.ui.log")
+import("core.ui.rect")
+import("core.ui.view")
+import("core.ui.label")
+import("core.ui.event")
+import("core.ui.button")
+import("core.ui.boxdialog")
+import("core.ui.textdialog")
+import("core.ui.inputdialog")
+import("core.ui.application")
+
+-- 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
+
+-- main entry
+function main(...)
+    demo:run(...)
+end
diff --git a/xmake/core/base/string.lua b/xmake/core/base/string.lua
index 3a4eab821..8bfbe3c4f 100644
--- a/xmake/core/base/string.lua
+++ b/xmake/core/base/string.lua
@@ -24,11 +24,12 @@ local string = string or {}
 -- load modules
 local deprecated = require("base/deprecated")
 local serialize  = require("base/serialize")
+local bit        = require("bit")
 
 -- save original interfaces
-string._dump = string._dump or string.dump
-string._trim = string._trim or string.trim
-string._split = string._split or string.split
+string._dump   = string._dump or string.dump
+string._trim   = string._trim or string.trim
+string._split  = string._split or string.split
 string._lastof = string._lastof or string.lastof
 
 -- find the last substring with the given pattern
@@ -257,5 +258,128 @@ function string:deserialize()
     return serialize.load(self)
 end
 
+-- unicode character width in the given index
+function string:wcwidth(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 = self: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 = self: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
+
+-- unicode string width in given start index
+function string:wcswidth(idx)
+    local width = 0
+    idx = idx or 1
+    while idx <= #self do
+        if bit.band(self:byte(idx), 0xc0) ~= 0x80 then
+            width = width + self:wcwidth(idx)
+        end
+        idx = idx + 1
+    end
+    return width
+end
+
 -- return module: string
 return string
diff --git a/xmake/core/ui/label.lua b/xmake/core/ui/label.lua
index 64cdf646e..63edb4481 100644
--- a/xmake/core/ui/label.lua
+++ b/xmake/core/ui/label.lua
@@ -131,7 +131,7 @@ 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 + line:wcwidth(i)
                     if size > width then
                         table.insert(result, line:sub(1, i - 1))
                         line = line:sub(i)