~mdw / tripe-android / blame
| Commit | Line | Data |
|---|---|---|
| c8292b34 MW |
1 | /* -*-scala-*- |
| 2 | * | |
| 3 | * Reporting progress for long-running jobs | |
| 4 | * | |
| 5 | * (c) 2018 Straylight/Edgeware | |
| 6 | */ | |
| 7 | ||
| 8 | /*----- Licensing notice --------------------------------------------------* | |
| 9 | * | |
| 10 | * This file is part of the Trivial IP Encryption (TrIPE) Android app. | |
| 11 | * | |
| 12 | * TrIPE is free software: you can redistribute it and/or modify it under | |
| 13 | * the terms of the GNU General Public License as published by the Free | |
| 14 | * Software Foundation; either version 3 of the License, or (at your | |
| 15 | * option) any later version. | |
| 16 | * | |
| 17 | * TrIPE is distributed in the hope that it will be useful, but WITHOUT | |
| 18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 20 | * for more details. | |
| 21 | * | |
| 22 | * You should have received a copy of the GNU General Public License | |
| 23 | * along with TrIPE. If not, see <https://www.gnu.org/licenses/>. | |
| 24 | */ | |
| 25 | ||
| 26 | package uk.org.distorted.tripe; package object progress; | |
| 27 | ||
| 28 | /*----- Imports -----------------------------------------------------------*/ | |
| 29 | ||
| 30 | import Math.ceil; | |
| 31 | import System.currentTimeMillis; | |
| 32 | import System.{err => stderr}; // FIXME: split out terminal progress | |
| 33 | ||
| 34 | /*----- Main code ---------------------------------------------------------*/ | |
| 35 | ||
| 36 | def formatTime(t: Int): String = | |
| 37 | if (t < -1) "???" | |
| 38 | else { | |
| 39 | val (s, t1) = (t%60, t/60); | |
| 40 | val (m, h) = (t1%60, t1/60); | |
| 41 | if (h > 0) f"$h%d:$m%02d:$s%02d" | |
| 42 | else f"$m%02d:$s%02d" | |
| 43 | } | |
| 44 | ||
| 45 | private val UDATA = Seq("kB", "MB", "GB", "PB", "EB"); | |
| 46 | def formatBytes(n: Long): String = { | |
| 47 | val (x, u) = (n.toDouble, "B ") /: UDATA { | |
| 48 | case ((x, u), name) if x >= 1024.0 => (x/1024.0, name) | |
| 49 | case (xu, _) => xu | |
| 50 | } | |
| 51 | f"$x%6.1f$u%s" | |
| 52 | } | |
| 53 | ||
| 54 | trait Eyecandy { | |
| 55 | def set(line: String); | |
| 56 | def clear(); | |
| 57 | def commit(); | |
| 58 | def commit(line: String) { commit(); set(line); commit(); } | |
| 59 | ||
| 60 | def begin(job: Job); | |
| 61 | } | |
| 62 | ||
| 63 | ||
| 64 | trait Job with Publisher[ { | |
| 65 | def what: String; // imperative for what we're doing | |
| 66 | def cur: Long; // current position in work | |
| 67 | def max: Long; // maximum work to do | |
| 68 | def format: String; // describe progress in useful terms | |
| 69 | ||
| 70 | private[this] val t0 = currentTimeMillis; | |
| 71 | ||
| 72 | def eta: Int = | |
| 73 | /* Report the estimated time remaining in seconds, or -1 if no idea. | |
| 74 | * | |
| 75 | * The model here is very stupid. Weird jobs should override this and do | |
| 76 | * something more sensible. | |
| 77 | */ | |
| 78 | ||
| 79 | if (max < 0 || cur <= 0) -1 | |
| 80 | else ceil((currentTimeMillis - t0)/1000.0 * | |
| 81 | (max - cur)/cur.toDouble).toInt; | |
| 82 | } | |
| 83 | ||
| 84 | object TerminalEyecandy extends Eyecandy { | |
| 85 | private var last = ""; | |
| 86 | var eyecandyp = | |
| 87 | ||
| 88 | } | |
| 89 | ||
| 90 | /*----- That's all, folks -------------------------------------------------*/ |