nim: Make printing customizable and default to colored output.

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2014
+Copyright (c) 2016
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -24,4 +24,4 @@ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

@@ -0,0 +1,45 @@
+# Console Progress Bar
+
+Simple progress bar for long-running operations.
+
+## Java/Groovy
+
+Build with gradle:
+
+    gradle assemble
+
+
+Example usage:
+
+```java
+import com.jdbernard.util.ConsoleProgressBar
+
+// ...
+
+ConsoleProgressBar progressBar = new ConsoleProgressBar()
+progressBar.setOut(System.out) // optional
+progressBar.setMax(100)
+
+for (int i = 0; i <= 100; i++) {
+  progressBar.update(i, "Message for " + i);
+  Thread.sleep(500);
+}
+```
+
+## Nim
+
+Install the library using nimble:
+
+    nimble install
+
+Example usage:
+
+```nim
+import os, console_progress
+
+var progress = newProgress(sout = stdout, maxValue = 100)
+
+for i in 0..100:
+  progress.updateProgress(i, "Message for " & i)
+  sleep(500)
+```

build.gradle

@@ -2,7 +2,7 @@ apply plugin: "groovy"
 apply plugin: "maven"
 
 group = "com.jdbernard"
-version = "1.0"
+version = "1.2.2"
 
 repositories {
     mavenLocal()

console_progress.nimble

@@ -1,6 +1,6 @@
 # Package
 
-version       = "1.0"
+version       = "1.2.3"
 author        = "Jonathan Bernard"
 description   = "Utility for writing dynamic progress bars to the console."
 license       = "BSD"
@@ -9,4 +9,3 @@ srcDir        = "src/main/nim"
 # Dependencies
 
 requires "nim >= 0.13.0"
-

src/main/groovy/com/jdbernard/util/ConsoleProgressBar.groovy

@@ -8,20 +8,20 @@ package com.jdbernard.util
  * counter is 1-based because the current step is complete for this counter.
  * @author Jonathan Bernard (jdbernard@gmail.com)
  */
-class ConsoleProgressBar {
+public class ConsoleProgressBar {
-  int MAX_STEP = 30
+  int WIDTH = 79
+  int MAX_STEP = 35
 
   long max = 10
   def out = System.out
   private int lastStepAmount = -1
-  private String lastLinePrinted = ""
   private String lastInfo = ""
   private long startTime
 
   public void setMax(long max) {
     this.max = Math.max(max, 1) }
 
-  void update(long value, String info) {
+  public void update(long value, String info) {
     if (value == 0 || startTime == 0)
         startTime = System.currentTimeMillis()
 
@@ -50,20 +50,17 @@ class ConsoleProgressBar {
       if (info.length() > 16) info = info[0..<16]
       if (info.length() < 16) info = info.padRight(16)
 
-      out.print '\b' * lastLinePrinted.length()
+      out.print '\b' * WIDTH
-      lastLinePrinted = '=' * numEq + (curStep > 0 ? "0" : "") + '-' * (MAX_STEP - curStep)
+      def line = = '=' * numEq + (curStep > 0 ? "0" : "") + '-' * (MAX_STEP - curStep)
-      lastLinePrinted += " ${info} -- (" +
+      line += " ${info} -- (" +
         "${String.format('%5.2f', curPercent * 100)}%, ${remMin ? remMin + 'm ' : ''}${remSec}s)       "
-      out.print lastLinePrinted
+      out.print line.padRight(WIDTH)
       lastStepAmount = curStep;
     }
     out.flush()
   }
 
-  void erase() {
+  public void erase() {
-      out.print '\b' * lastLinePrinted.length()
+      out.print ('\b' * WIDTH) + (' ' * WIDTH) + ('\b' * WIDTH)
-      out.print ' ' * lastLinePrinted.length()
-      out.print '\b' * lastLinePrinted.length()
-      lastLinePrinted = ""
   }
 }

src/main/nim/console_progress.nim

@@ -1,11 +1,37 @@
 import strutils, times, math
 
-type Progress* = ref object of RootObj
+type
-  sout: File
+  PBDisplayConfig* = object
-  lastStep, maxSteps: int
+    ## Progress Bar Display Configuration - controls how the progress bar is
-  startTime: float
+    ## displayed to the terminal
-  lastLinePrinted, lastInfo: string
+    before*: string     ## Written at the start, before the bar. This is
-  maxValue: BiggestInt
+                        ## intended for ANSI control characters and must take
+                        ## up zero characters when printed.
+    after*: string      ## Written at the end, after the bar This is intended
+                        ## for ANSI control characters and must take up zero
+                        ## characters when printed.
+    completed*: string  ## Written for each completed step of the bar. This
+                        ## should take up one character of space when printed.
+    todo*: string       ## Written for each step remaining in the bar. This
+                        ## should take up one character of space when printed.
+    separator*: string  ## Written for the current step, separating completed
+                        ## and done. This should take up one character of space
+                        ## when printed.
+
+  Progress* = ref object of RootObj
+    sout: File
+    lastStep, width, maxSteps: int
+    startTime: float
+    lastInfo: string
+    maxValue: BiggestInt
+    displayCfg: PBDisplayConfig
+
+const DEFAULT_DISPLAY_CFG* = PBDisplayConfig(
+  before: "\x1b[38;5;2m",
+  after: "\x1b[0m",
+  completed: "━",
+  todo: "─",
+  separator: "𜱶\x1b[38;5;8m")
 
 proc getMax*(pd: Progress): BiggestInt =
   return pd.maxValue
@@ -13,13 +39,20 @@ proc getMax*(pd: Progress): BiggestInt =
 proc setMax*(pd: Progress, maxValue: BiggestInt) =
   pd.maxValue = max(maxValue, 1)
 
-proc newProgress*(sout: File, maxValue: BiggestInt): Progress =
+proc newProgress*(
+    maxValue: BiggestInt,
+    sout: File = stdout,
+    width: int = 79,
+    maxSteps: int = 35,
+    displayCfg: PBDisplayConfig = DEFAULT_DISPLAY_CFG): Progress =
+
   return Progress(sout: sout,
     startTime: cpuTime(),
     lastStep: 0,
-    lastLinePrinted: "",
     maxValue: maxValue,
-    maxSteps: 30)
+    width: 79,
+    maxSteps: 35,
+    displayCfg: displayCfg)
 
 proc updateProgress*(pd: Progress, newValue: BiggestInt, info: string): void =
 
@@ -30,9 +63,11 @@ proc updateProgress*(pd: Progress, newValue: BiggestInt, info: string): void =
 
   if info == pd.lastInfo and curStep == pd.lastStep: return
 
-  let curTime = cpuTime()
+  let curDuration = cpuTime() - pd.startTime
-  let remTime = ((curTime / curPercent) - curTime) * 1000
+  let remTime = ((curDuration / curPercent) - curDuration)
-  let displayedSteps = max(curStep - 1, 0)
+  let displayedSteps =
+    if curStep == pd.maxSteps: curStep
+    else: max(curStep - 1, 0)
 
   pd.lastInfo = info
   var displayedInfo = info
@@ -40,29 +75,32 @@ proc updateProgress*(pd: Progress, newValue: BiggestInt, info: string): void =
   if displayedInfo.len < 16:
     displayedInfo = displayedInfo & ' '.repeat(16 - displayedInfo.len)
 
-  pd.sout.write('\b'.repeat(pd.lastLinePrinted.len))
+  pd.sout.write('\b'.repeat(pd.width))
 
-  pd.lastLinePrinted =
+  var line =
-    '='.repeat(displayedSteps) & (if curStep > 0: "0" else: "") &
+    pd.displayCfg.before &
-    '-'.repeat(pd.maxSteps - curStep) & " " &
+    pd.displayCfg.completed.repeat(displayedSteps) &
+    (if curStep > 0 and curStep < pd.maxSteps: pd.displayCfg.separator else: "") &
+    pd.displayCfg.todo.repeat(pd.maxSteps - curStep) &
+    pd.displayCfg.after & " " &
     displayedInfo & " -- (" &
-    (curPercent * 100).formatFloat(ffDecimal, 2) & "%" 
+    (curPercent * 100).formatFloat(ffDecimal, 2) & "%"
 
   if curPercent > 0.05:
-    pd.lastLinePrinted &= ", "
+    line &= ", "
     if remTime > 60:
-      pd.lastLinePrinted &= $floor(remTime / 60).int & "m "
+      line &= $floor(remTime / 60).int & "m "
-    pd.lastLinePrinted &= $ceil(remTime mod 60) & "s"
+    line &= $ceil(remTime mod 60) & "s"
 
-  pd.lastLinePrinted &= ")"
+  line &= ")"
+  line &= spaces(max(pd.width - line.len, 0))
 
-  pd.sout.write(pd.lastLinePrinted)
+  pd.sout.write(line)
   pd.lastStep = curStep
 
   pd.sout.flushFile
 
 proc erase*(pd: Progress): void =
-  pd.sout.write('\b'.repeat(pd.lastLinePrinted.len))
+  pd.sout.write('\b'.repeat(pd.width))
-  pd.sout.write(' '.repeat(pd.lastLinePrinted.len))
+  pd.sout.write(' '.repeat(pd.width))
-  pd.sout.write('\b'.repeat(pd.lastLinePrinted.len))
+  pd.sout.write('\b'.repeat(pd.width))
-  pd.lastLinePrinted = ""

src/test/nim/test.nim

@@ -0,0 +1,8 @@
+import std/os
+import ../../main/nim/console_progress
+
+when isMainModule:
+  let pd = newProgress(100)
+  for i in 0 .. 100:
+    pd.updateProgress(i, "step " & $i)
+    sleep 25