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--!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 - 2018, TBOOX Open Source Group.
--
-- @author ruki
-- @file border.lua
--
-- load modules
local log = require("ui/log")
local rect = require("ui/rect")
local view = require("ui/view")
local label = require("ui/label")
local curses = require("ui/curses")
-- define module
local border = border or view()
-- init border
function border:init(name, bounds)
-- init view
view.init(self, name, bounds)
-- check bounds
assert(self:width() > 2 and self:height() > 2, string.format("%s: too small!", self))
end
-- draw border
function border:draw(transparent)
-- draw background (transparent)
view.draw(self, true)
-- get corner attribute
local cornerattr = self:cornerattr()
-- the left-upper attribute
local attr_ul = curses.color_pair(cornerattr[1], self:background())
if self:background() == cornerattr[1] then
attr_ul = {attr_ul, "standout"}
end
-- the right-lower attribute
local attr_rl = curses.color_pair(cornerattr[2], self:background())
if self:background() == cornerattr[2] then
attr_rl = {attr_rl, "standout"}
end
-- the border characters
-- @note acs character will use 2 width on borders (pdcurses), so we use acsii characters instead of them.
local iswin = os.host() == "windows"
local hline = iswin and '-' or "hline"
local vline = iswin and '|' or "vline"
local ulcorner = iswin and ' ' or "ulcorner"
local llcorner = iswin and ' ' or "llcorner"
local urcorner = iswin and ' ' or "urcorner"
local lrcorner = iswin and ' ' or "lrcorner"
-- draw left and top border
self:canvas():attr(attr_ul)
self:canvas():move(0, 0):putchar(hline, self:width())
self:canvas():move(0, 0):putchar(ulcorner)
self:canvas():move(0, 1):putchar(vline, self:height() - 1, true)
self:canvas():move(0, self:height() - 1):putchar(llcorner)
-- draw bottom and right border
self:canvas():attr(attr_rl)
self:canvas():move(1, self:height() - 1):putchar(hline, self:width() - 1)
self:canvas():move(self:width() - 1, 0):putchar(urcorner)
self:canvas():move(self:width() - 1, 1):putchar(vline, self:height() - 1, true)
self:canvas():move(self:width() - 1, self:height() - 1):putchar(lrcorner)
end
-- get border corner attribute
function border:cornerattr()
return self._CORNERATTR or {"white", "black"}
end
-- set border corner attribute
function border:cornerattr_set(attr_ul, attr_rl)
self._CORNERATTR = {attr_ul or "white", attr_rl or attr_ul or "black"}
self:invalidate()
end
-- swap border corner attribute
function border:cornerattr_swap()
local cornerattr = self:cornerattr()
self:cornerattr_set(cornerattr[2], cornerattr[1])
end
-- return module
return border
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