1 files changed, 143 insertions, 0 deletions
diff --git a/xmake/core/ui/canvas.lua b/xmake/core/ui/canvas.lua
new file mode 100644
index 000000000..3b538308f
--- /dev/null
+++ b/xmake/core/ui/canvas.lua
@@ -0,0 +1,143 @@
+--!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 - 2017, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        canvas.lua
+--
+
+--[[ Console User Interface (cui) ]-----------------------------------------
+Author: Tiago Dionizio (tiago.dionizio AT gmail.com)
+$Id: canvas.lua 18 2007-06-21 20:43:52Z tngd $
+--------------------------------------------------------------------------]]
+
+-- load modules
+local object = require("ui/object")
+local curses = require("ui/curses")
+
+-- define module
+local canvas = canvas or object()
+
+-- new canvas instance
+function canvas:new(view, window)
+
+    -- create instance
+    self = self()
+
+    -- save view and window
+    self._view = view
+    self._window = window
+    assert(view and window, "cannot new canvas instance without view and window!")
+
+    -- TODO
+    self:attr()
+    return self
+end
+
+-- clear canvas
+function canvas:clear()
+    self._window:clear()
+    return self
+end
+
+-- move canvas to the given position
+function canvas:move(x, y)
+    self._window:move(y, x)
+    return self
+end
+
+-- get canvas border
+function canvas:border()
+    self._window:border()
+    return self
+end
+
+-- write a character to canvas
+function canvas:write_ch(ch)
+    self._window:addch(ch)
+    return self
+end
+
+-- write an acs character
+function canvas:write_acs(ch)
+    return self:write_ch(curses.acs(ch))
+end
+
+-- write a string to canvas
+function canvas:write(str, len)
+    if type(str) == 'string' then
+        self._window:addstr(str, len)
+    else
+        self._window:addchstr(str._line, len)
+    end
+    return self
+end
+
+function canvas:attr(attrs, modify)
+    local w = self._window
+    local apply = w.attron
+    local attr = curses.calc_attr(attrs)
+
+    if modify == nil then
+        w:attrset(attr)
+    elseif modify == false then
+        w:attroff(attr)
+    else
+        w:attron(attr)
+    end
+
+    apply(w, attr)
+
+    return self
+end
+
+--[[
+function canvas:line(length)
+    return Line:create(length)
+end
+
+
+function Line:create(length)
+    self = self()
+    self._length = length
+    self._line = curses.new_chstr(length)
+    return self
+end
+
+function Line:__len()
+    return self._length
+end
+
+function Line:ch(offset, char, attrs, length)
+    self._line:set_ch(offset, char, attrs and calc_attr(attrs), length)
+    return self
+end
+
+function Line:acs(offset, char, attrs, length)
+    return self:ch(offset, acs(char), attrs, length)
+end
+
+function Line:str(offset, str, attrs, rep)
+    self._line:set_str(offset, str, calc_attr(attrs), rep)
+    return self
+end
+]]
+
+-- return module
+return canvas