--!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        textedit.lua
--

-- load modules
local log       = require("ui/log")
local view      = require("ui/view")
local label     = require("ui/label")
local event     = require("ui/event")
local border    = require("ui/border")
local curses    = require("ui/curses")
local textarea  = require("ui/textarea")

-- define module
local textedit = textedit or textarea()

-- init textedit
function textedit:init(name, bounds, text)

    -- init label
    textarea.init(self, name, bounds, text)

    -- show cursor
    self:cursor_show(true)

    -- mark as selectable
    self:option_set("selectable", true)

    -- disable progress
    self:option_set("progress", false)

    -- enable multiple line
    self:option_set("multiline", true)
end

-- draw textedit
function textedit:draw(transparent)

    -- draw label
    textarea.draw(self, transparent)

    -- move cursor
    if not self:text() or #self:text() == 0 then
        self:cursor_move(0, 0)
    else
        self:cursor_move(self:canvas():pos())
    end
end

-- set text
function textedit:text_set(text)
    textarea.text_set(self, text)
    self:scroll_to_end()
    return self
end

-- on event
function textedit:event_on(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)
            return true
        elseif e.key_name == "Enter" and self:option("multiline") then
            self:text_set(self:text() .. '\n')
            return true
        elseif e.key_name == "Backspace" then
            local text = self:text()
            if #text > 0 then
                self:text_set(text:sub(1, #text - 1))
            end
            return true
        elseif e.key_name == "CtrlV" then
            local pastetext = os.pbpaste()
            if pastetext then
                self:text_set(self:text() .. pastetext)
            end
            return true
        end
    end

    -- do textarea event
    return textarea.event_on(self, e) 
end

-- return module
return textedit