1 files changed, 142 insertions, 0 deletions
diff --git a/xmake/core/ui/rect.lua b/xmake/core/ui/rect.lua
new file mode 100644
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+++ b/xmake/core/ui/rect.lua
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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 - 2017, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        rect.lua
+--
+
+--[[ Console User Interface (cui) ]-----------------------------------------
+Author: Tiago Dionizio (tiago.dionizio AT gmail.com)
+$Id: rect.lua 18 2007-06-21 20:43:52Z tngd $
+--------------------------------------------------------------------------]]
+
+-- load modules
+local point  = require("ui/point")
+local object = require("ui/object")
+
+-- define module
+local rect = rect or object { _init = {"sx", "sy", "ex", "ey"} }
+
+-- get rect size
+function rect:size()
+    return point { self.ex - self.sx, self.ey - self.sy }
+end
+
+-- move rect
+function rect:move(dx, dy)
+    self.sx = self.sx + dx
+    self.sy = self.sy + dy
+    self.ex = self.ex + dx
+    self.ey = self.ey + dy
+    return self
+end
+
+-- move top right corner of the rect
+function rect:moves(dx, dy)
+    self.sx = self.sx + dx
+    self.sy = self.sy + dy
+    return self
+end
+
+-- move bottom left corner of the rect
+function rect:movee(dx, dy)
+    self.ex = self.ex + dx
+    self.ey = self.ey + dy
+    return self
+end
+
+-- expand rect area
+function rect:grow(dx, dy)
+    self.sx = self.sx - dx
+    self.sy = self.sy - dy
+    self.ex = self.ex + dx
+    self.ey = self.ey + dy
+    return self
+end
+
+-- set rect with shared area between this rect and a given rect
+function rect:intersect(r)
+    self.sx = math.max(self.sx, r.sx)
+    self.sy = math.max(self.sy, r.sy)
+    self.ex = math.min(self.ex, r.ex)
+    self.ey = math.min(self.ey, r.ey)
+    return self
+end
+
+-- get rect with shared area between two rects: local rect_new = r1 / r2
+function rect:__div(r)
+    return self():intersect(r)
+end
+
+-- set union rect
+function rect:union(r)
+    self.sx = math.min(self.sx, r.sx)
+    self.sy = math.min(self.sy, r.sy)
+    self.ex = math.max(self.ex, r.ex)
+    self.ey = math.max(self.ey, r.ey)
+    return self
+end
+
+-- get union rect: local rect_new = r1 + r2
+function rect:__add(r)
+    return self():union(r)
+end
+
+-- r1 == r1?
+function rect:__eq(r)
+    return
+        self.sx == r.sx and
+        self.sy == r.sy and
+        self.ex == r.ex and
+        self.ey == r.ey
+end
+
+-- contains the given point in rect?
+function rect:contains(x, y)
+    return x >= self.sx and x < self.ex and y >= self.sy and y < self.ey
+end
+
+-- empty rect?
+function rect:empty()
+    return self.sx >= self.ex or self.sy >= self.ey
+end
+
+-- tostring(r)
+function rect:__tostring()
+    if self:empty() then
+        return '[empty]'
+    end
+    return '[(' .. self.sx .. ',' .. self.sy .. '),(' .. self.ex .. ',' .. self.ey .. ')]'
+end
+
+-- r1 .. r2
+function rect.__concat(op1, op2)
+    if type(op1) == 'string' then
+        return op1 .. op2:__tostring()
+    elseif type(op2) == 'string' then
+        return op1:__tostring() .. op2
+    else
+        return op1:__tostring() .. op2:__tostring()
+    end
+end
+
+-- return module
+return rect