From 17045d86313a9d06784dcddecf3887a4da893929 Mon Sep 17 00:00:00 2001
From: laelnasan <lael.nasan@gmail.com>
Date: Sat, 5 Dec 2020 11:43:54 -0300
Subject: [PATCH] Supports utf8 printing and input  Changes to be committed: 
 modified:   src/ltui/label.lua 	modified:   src/ltui/textedit.lua

---
 src/ltui/label.lua    | 16 ++++++++++++++--
 src/ltui/textedit.lua | 10 +++++++---
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/src/ltui/label.lua b/src/ltui/label.lua
index 2e33f05..4e7c16a 100644
--- a/src/ltui/label.lua
+++ b/src/ltui/label.lua
@@ -127,8 +127,20 @@ function label:splitext(text, width)
     for idx = 1, #lines do
         local line = lines[idx]
         while #line > width do
-            table.insert(result, line:sub(1, width))
-            line = line:sub(width + 1)
+            local size = 0
+            for i = 1, #line do
+                if line:byte(i) < 0x80 or line:byte(i) >= 0xc0 then
+                    size = size + 1
+                    if size > width then
+                        table.insert(result, line:sub(1, i - 1))
+                        line = line:sub(i)
+                        break
+                    end
+                end
+            end
+            if size <= width then
+                break
+            end
         end
         table.insert(result, line)
     end
diff --git a/src/ltui/textedit.lua b/src/ltui/textedit.lua
index 0acef24..b2efbf5 100644
--- a/src/ltui/textedit.lua
+++ b/src/ltui/textedit.lua
@@ -77,8 +77,8 @@ function textedit:on_event(e)
 
     -- update text
     if e.type == event.ev_keyboard then
-        if e.key_code > 0x1f and e.key_code < 0x7f then
-            self:text_set(self:text() .. e.key_name)
+        if e.key_code > 0x1f and e.key_code < 0x100  then
+            self:text_set(self:text() .. string.char(e.key_code))
             return true
         elseif e.key_name == "Enter" and self:option("multiline") then
             self:text_set(self:text() .. '\n')
@@ -86,7 +86,11 @@ function textedit:on_event(e)
         elseif e.key_name == "Backspace" then
             local text = self:text()
             if #text > 0 then
-                self:text_set(text:sub(1, #text - 1))
+                local ch_size = -1
+                while text:byte(ch_size) > 0x7f and text:byte(ch_size) < 0xc0 do
+                    ch_size = ch_size - 1
+                end
+                self:text_set(text:sub(1, #text + ch_size))
             end
             return true
         elseif e.key_name == "CtrlV" then