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--!A cross-platform build utility based on Lua
--
-- Licensed 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) 2015-2020, TBOOX Open Source Group.
--
-- @author OpportunityLiu
-- @file progress.lua
--
-- imports
import("core.base.option")
import("core.base.object")
import("core.base.colors")
import("core.base.tty")
import("core.theme.theme")
-- define module
local process = process or object { _init = { "_RUNNING", "_INDEX", "_STREAM", "_OPT" } }
-- stop the progress indicator, clear written frames
function process:stop()
if self._RUNNING ~= 0 then
self:clear()
self._RUNNING = 0
self._INDEX = 0
end
end
function process:_clear()
if self._RUNNING == 1 then
tty.erase_line_to_end()
self._RUNNING = 2
return true
end
end
-- clear previous frame of the progress indicator
function process:clear()
if self:_clear() then
self._STREAM:flush()
end
end
-- write next frame of the progress indicator
function process:write()
local chars = self._OPT.chars[self._INDEX % #self._OPT.chars + 1]
tty.cursor_and_attrs_save()
self._STREAM:write(chars)
self._STREAM:flush()
tty.cursor_and_attrs_restore()
self._INDEX = self._INDEX + 1
self._RUNNING = 1
end
-- check if the progress indicator is running
function process:running()
return self._RUNNING and true or false
end
-- showing progress line without scroll?
function showing_without_scroll()
return _g.showing_without_scroll
end
-- show the message with process
function show(progress, format, ...)
local progress_prefix = "${color.build.progress}" .. theme.get("text.build.progress_format") .. ":${clear} "
if option.get("verbose") then
cprint(progress_prefix .. "${dim}" .. format, progress, ...)
else
local is_scroll = _g.is_scroll
if is_scroll == nil then
is_scroll = theme.get("text.build.progress_style") == "scroll"
_g.is_scroll = is_scroll
end
if is_scroll then
cprint(progress_prefix .. format, progress, ...)
else
tty.erase_line_to_start().cr()
local msg = vformat(progress_prefix .. format, progress, ...)
local msg_plain = colors.translate(msg, {plain = true})
local maxwidth = os.getwinsize().width
if #msg_plain <= maxwidth then
cprintf(msg)
else
-- windows width is too small? strip the partial message in middle
local partlen = math.floor(maxwidth / 2) - 3
local sep = msg_plain:sub(partlen + 1, #msg_plain - partlen - 1)
local split = msg:split(sep, {plain = true, strict = true})
cprintf(table.concat(split, "..."))
end
if math.floor(progress) == 100 then
print("")
_g.showing_without_scroll = false
else
_g.showing_without_scroll = true
end
io.flush()
end
end
end
-- build a progress indicator
-- @params stream - stream to write to, will use io.stdout if not provided
-- @params opt - options
-- - chars - an array of chars for progress indicator
function new(stream, opt)
-- set default values
stream = stream or io.stdout
opt = opt or {}
if opt.chars == nil or #opt.chars == 0 then
opt.chars = theme.get("text.spinner.chars")
end
return process {_OPT = opt, _STREAM = stream, _RUNNING = 0, _INDEX = 0}
end
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