0.9.4

CHANGELOG.md

@@ -1,4 +1,15 @@
 # Changelog
+ * `0.9.4`:
+     - New functionalities:
+        - In `ProgressBarBuilder`s, one can now switch whether to show the remaining time, or to provide a custom
+          function to compute the remaining time (if the progress is not linear) (#131). Thanks @MagnusErikssonAB !
+        - In `ProgressBarBuilder`s, one can now set `.clearDisplayOnFinish()` to clear the display on terminals when 
+          a progress is complete (#135). Thanks @mattparkins !
+        - Added a method `ProgressBar::isIndefinite` to check if a progress bar's max is unknown (#140). Thanks @lt3stus3el !
+     - Bugfixes:
+        - Fixed the bug of not drawing after resetting or stepping back caused by #91 (#124). Thanks @Bricktheworld !
+        - Suppress exceptions thrown in `Spliterator.estimateSize` and continue as if indefinite (#141). Thanks @seanf !
+     - Dependency version bump.
  * `0.9.3`:
      - New functionalities:
         - Supports for wrapping around `java.io.OutputStream`s and `java.io.Writer`s (#114). Thanks @azachar !

README.md

@@ -18,7 +18,7 @@ For Consolas or Andale Mono fonts, use `ProgressBarStyle.ASCII` because the box-
 
 #### Documentation
  - [Documentation](http://ctongfei.github.io/progressbar/)
- - [Javadoc](https://javadoc.io/doc/me.tongfei/progressbar/0.9.3)
+ - [Javadoc](https://javadoc.io/doc/me.tongfei/progressbar/latest)
 
 
 #### Installation
@@ -29,7 +29,7 @@ Maven:
   <dependency>
       <groupId>me.tongfei</groupId>
       <artifactId>progressbar</artifactId>
-      <version>0.9.3</version>
+      <version>0.9.4</version>
   </dependency>
 ```
 

docs/builder.md

@@ -14,7 +14,6 @@ ProgressBarBuilder pbb = new ProgressBarBuilder()
     .setMaxRenderedLength(<max rendered length in terminal>)
     .showSpeed();
   // or .showSpeed(new DecimalFormat("#.##")) to customize speed display
-
 for (T x : ProgressBar.wrap(collection, pbb)) {
     ...
 }

docs/index.md

@@ -12,14 +12,14 @@ Depending on your build tool, add the following setting.
     <dependency>
         <groupId>me.tongfei</groupId>
         <artifactId>progressbar</artifactId>
-        <version>0.9.3</version>
+        <version>0.9.4</version>
     </dependency>
     ```
 
 === "Gradle"
 
     ``` groovy
-    compile 'me.tongfei:progressbar:0.9.3'
+    compile 'me.tongfei:progressbar:0.9.4'
     ```
 
 #### Getting started

mkdocs.yml

@@ -1,7 +1,7 @@
-site_name: 'Progressbar 0.9.3'
+site_name: 'Progressbar 0.9.4'
 site_description: 'A terminal progress bar for Java/JVM'
 site_author: 'Tongfei Chen'
-copyright: 'Copyright © 2015-2021 Tongfei Chen and contributors'
+copyright: 'Copyright © 2015-2022 Tongfei Chen and contributors'
 
 theme:
   name: 'material'

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>me.tongfei</groupId>
     <artifactId>progressbar</artifactId>
-    <version>0.9.3</version>
+    <version>0.9.4</version>
     <name>progressbar</name>
     <description>A terminal-based progress bar for JVM</description>
     <url>http://github.com/ctongfei/progressbar</url>
@@ -133,28 +133,28 @@
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter-api</artifactId>
-            <version>5.8.2</version>
+            <version>5.9.0</version>
             <scope>test</scope>
         </dependency>
 
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter-engine</artifactId>
-            <version>5.8.2</version>
+            <version>5.9.0</version>
             <scope>test</scope>
         </dependency>
 
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>1.7.32</version>
+            <version>2.0.0</version>
             <scope>test</scope>
         </dependency>
 
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-simple</artifactId>
-            <version>1.7.32</version>
+            <version>2.0.0</version>
             <scope>test</scope>
         </dependency>
     </dependencies>

src/main/java/me/tongfei/progressbar/DefaultProgressBarRenderer.java

@@ -4,6 +4,8 @@
 import java.time.Duration;
 import java.time.Instant;
 import java.time.temporal.ChronoUnit;
+import java.util.Optional;
+import java.util.function.BiFunction;
 
 import static me.tongfei.progressbar.StringDisplayUtils.*;
 
@@ -21,21 +23,27 @@ public class DefaultProgressBarRenderer implements ProgressBarRenderer {
     private boolean isSpeedShown;
     private DecimalFormat speedFormat;
     private ChronoUnit speedUnit;
+    private boolean isETAShown;
+    private BiFunction<ProgressState, Duration, Optional<Duration>> eta;
 
     protected DefaultProgressBarRenderer(
             ProgressBarStyle style,
             String unitName,
             long unitSize,
             boolean isSpeedShown,
             DecimalFormat speedFormat,
-            ChronoUnit speedUnit
+            ChronoUnit speedUnit,
+            boolean isETAShown,
+            BiFunction<ProgressState, Duration, Optional<Duration>> eta
     ) {
         this.style = style;
         this.unitName = unitName;
         this.unitSize = unitSize;
         this.isSpeedShown = isSpeedShown;
         this.speedFormat = isSpeedShown && speedFormat == null ? new DecimalFormat() : speedFormat;
         this.speedUnit = speedUnit;
+        this.isETAShown = isETAShown;
+        this.eta = eta;
     }
 
     // Number of full blocks
@@ -49,12 +57,14 @@ protected int progressFractionalPart(ProgressState progress, int length) {
         return (int) Math.floor(fraction);
     }
 
-    protected String eta(ProgressState progress, Duration elapsed) {
-        if (progress.max <= 0 || progress.indefinite) return "?";
-        else if (progress.current - progress.start == 0) return "?";
-        else return Util.formatDuration(
-                    elapsed.dividedBy(progress.current - progress.start).multipliedBy(progress.max - progress.current)
-            );
+    protected String etaString(ProgressState progress, Duration elapsed) {
+        Optional<Duration> eta = this.eta.apply(progress, elapsed);
+        if (eta.isPresent()) {
+            return Util.formatDuration(eta.get());
+        }
+        else {
+            return "?";
+        }
     }
 
     protected String percentage(ProgressState progress) {
@@ -118,7 +128,7 @@ public String render(ProgressState progress, int maxLength) {
 
         String speedString = isSpeedShown ? speed(progress, elapsed) : "";
         String suffix = style.rightBracket + " " + ratio(progress) + " ("
-                + Util.formatDuration(elapsed) + " / " + eta(progress, elapsed) + ") "
+                + Util.formatDuration(elapsed) + (isETAShown ? " / " + etaString(progress, elapsed) : "") + ") "
                 + speedString + progress.extraMessage;
         int suffixLength = getStringDisplayLength(suffix);
         // trim excessive suffix

src/main/java/me/tongfei/progressbar/ProgressBar.java

@@ -24,17 +24,22 @@
  */
 public class ProgressBar implements AutoCloseable {
 
-    private ProgressState progress;
-    private ProgressUpdateAction action;
-    private ScheduledFuture<?> scheduledTask;
+    private final ProgressState progress;
+    private final ProgressUpdateAction action;
+    private final ScheduledFuture<?> scheduledTask;
 
     /**
      * Creates a progress bar with the specific taskName name and initial maximum value.
      * @param task Task name
      * @param initialMax Initial maximum value
      */
     public ProgressBar(String task, long initialMax) {
-        this(task, initialMax, 1000, false, System.err, ProgressBarStyle.COLORFUL_UNICODE_BLOCK, "", 1, false, null, ChronoUnit.SECONDS, 0L, Duration.ZERO);
+        this(
+                task, initialMax, 1000, false, false,
+                System.err, ProgressBarStyle.COLORFUL_UNICODE_BLOCK,
+                "", 1, false, null,
+                ChronoUnit.SECONDS, 0L, Duration.ZERO
+        );
     }
 
     /**
@@ -54,6 +59,7 @@ public ProgressBar(
             long initialMax,
             int updateIntervalMillis,
             boolean continuousUpdate,
+            boolean clearDisplayOnFinish,
             PrintStream os,
             ProgressBarStyle style,
             String unitName,
@@ -64,8 +70,12 @@ public ProgressBar(
             long processed,
             Duration elapsed
     ) {
-        this(task, initialMax, updateIntervalMillis, continuousUpdate, processed, elapsed,
-                new DefaultProgressBarRenderer(style, unitName, unitSize, showSpeed, speedFormat, speedUnit),
+        this(task, initialMax, updateIntervalMillis, continuousUpdate, clearDisplayOnFinish, processed, elapsed,
+                new DefaultProgressBarRenderer(
+                        style, unitName, unitSize,
+                        showSpeed, speedFormat, speedUnit,
+                        true, Util::linearETA
+                ),
                 createConsoleConsumer(os)
         );
     }
@@ -88,13 +98,14 @@ public ProgressBar(
             long initialMax,
             int updateIntervalMillis,
             boolean continuousUpdate,
+            boolean clearDisplayOnFinish,
             long processed,
             Duration elapsed,
             ProgressBarRenderer renderer,
             ProgressBarConsumer consumer
     ) {
         this.progress = new ProgressState(task, initialMax, processed, elapsed);
-        this.action = new ProgressUpdateAction(progress, renderer, consumer, continuousUpdate);
+        this.action = new ProgressUpdateAction(progress, renderer, consumer, continuousUpdate, clearDisplayOnFinish);
         scheduledTask = Util.executor.scheduleAtFixedRate(
                 action, 0, updateIntervalMillis, TimeUnit.MILLISECONDS
         );
@@ -114,7 +125,9 @@ public ProgressBar stepBy(long n) {
      * @param n New progress value
      */
     public ProgressBar stepTo(long n) {
+        boolean back = n < progress.current;
         progress.stepTo(n);
+        if (back) action.forceRefresh();  // fix #124
         return this;
     }
 
@@ -159,6 +172,7 @@ public ProgressBar resume() {
     /** Resets the progress bar to its initial state (where progress equals to 0). */
     public ProgressBar reset() {
         progress.reset();
+        action.forceRefresh();  // force refresh, fixing #124
         return this;
     }
 
@@ -214,6 +228,11 @@ public String getExtraMessage() {
         return progress.getExtraMessage();
     }
 
+    /** Checks if the progress bar is indefinite, i.e., its maximum value is unknown. */
+    public boolean IsIndefinite() {
+        return progress.indefinite;
+    }
+
     /**
      * Prompts the progress bar to refresh. Normally a user should not call this function.
      */
@@ -264,9 +283,8 @@ public static <T> Iterable<T> wrap(Iterable<T> ts, String task) {
      * @param pbb An instance of a {@link ProgressBarBuilder}
      */
     public static <T> Iterable<T> wrap(Iterable<T> ts, ProgressBarBuilder pbb) {
-        long size = ts.spliterator().estimateSize();
-        if (size != Long.MAX_VALUE)
-            pbb.setInitialMax(size);
+        if (!pbb.initialMaxIsSet())
+            pbb.setInitialMax(Util.getSpliteratorSize(ts.spliterator()));
         return new ProgressBarWrappedIterable<>(ts, pbb);
     }
 
@@ -287,9 +305,8 @@ public static InputStream wrap(InputStream is, String task) {
      * @param pbb An instance of a {@link ProgressBarBuilder}
      */
     public static InputStream wrap(InputStream is, ProgressBarBuilder pbb) {
-        long size = Util.getInputStreamSize(is);
-        if (size != -1 && pbb.initialMaxIsSet())
-            pbb.setInitialMax(size);
+        if (!pbb.initialMaxIsSet())
+            pbb.setInitialMax(Util.getInputStreamSize(is));
         return new ProgressBarWrappedInputStream(is, pbb.build());
     }
 
@@ -370,9 +387,8 @@ public static <T> Spliterator<T> wrap(Spliterator<T> sp, String task) {
      * @param pbb An instance of a {@link ProgressBarBuilder}
      */
     public static <T> Spliterator<T> wrap(Spliterator<T> sp, ProgressBarBuilder pbb) {
-        long size = sp.estimateSize();
-        if (size != Long.MAX_VALUE)
-            pbb.setInitialMax(size);
+        if (!pbb.initialMaxIsSet())
+            pbb.setInitialMax(Util.getSpliteratorSize(sp));
         return new ProgressBarWrappedSpliterator<>(sp, pbb.build());
     }
 

src/main/java/me/tongfei/progressbar/ProgressBarBuilder.java

@@ -3,6 +3,8 @@
 import java.text.DecimalFormat;
 import java.time.Duration;
 import java.time.temporal.ChronoUnit;
+import java.util.Optional;
+import java.util.function.BiFunction;
 
 /**
  * Builder class for {@link ProgressBar}s.
@@ -17,9 +19,12 @@ public class ProgressBarBuilder {
     private boolean continuousUpdate = false;
     private ProgressBarStyle style = ProgressBarStyle.COLORFUL_UNICODE_BLOCK;
     private ProgressBarConsumer consumer = null;
+    private boolean clearDisplayOnFinish = false;
     private String unitName = "";
     private long unitSize = 1;
     private boolean showSpeed = false;
+    private boolean hideETA = false;
+    private BiFunction<ProgressState, Duration, Optional<Duration>> eta = Util::linearETA;
     private DecimalFormat speedFormat;
     private ChronoUnit speedUnit = ChronoUnit.SECONDS;
     private long processed = 0;
@@ -62,6 +67,11 @@ public ProgressBarBuilder setConsumer(ProgressBarConsumer consumer) {
         return this;
     }
 
+    public ProgressBarBuilder clearDisplayOnFinish() {
+        this.clearDisplayOnFinish = true;
+        return this;
+    }
+
     public ProgressBarBuilder setUnit(String unitName, long unitSize) {
         this.unitName = unitName;
         this.unitSize = unitSize;
@@ -83,6 +93,17 @@ public ProgressBarBuilder showSpeed(DecimalFormat speedFormat) {
         return this;
     }
 
+    public ProgressBarBuilder hideETA() {
+        this.hideETA = true;
+        return this;
+    }
+
+    public ProgressBarBuilder setETAFunction(BiFunction<ProgressState, Duration, Optional<Duration>> eta) {
+        this.hideETA = false;
+        this.eta = eta;
+        return this;
+    }
+
     public ProgressBarBuilder setSpeedUnit(ChronoUnit speedUnit) {
         this.speedUnit = speedUnit;
         return this;
@@ -105,9 +126,13 @@ public ProgressBar build() {
                 initialMax,
                 updateIntervalMillis,
                 continuousUpdate,
+                clearDisplayOnFinish,
                 processed,
                 elapsed,
-                new DefaultProgressBarRenderer(style, unitName, unitSize, showSpeed, speedFormat, speedUnit),
+                new DefaultProgressBarRenderer(
+                        style, unitName, unitSize,
+                        showSpeed, speedFormat, speedUnit,
+                        !hideETA, eta),
                 consumer == null ? Util.createConsoleConsumer(maxRenderedLength) : consumer
         );
     }

src/main/java/me/tongfei/progressbar/ProgressBarConsumer.java

@@ -21,6 +21,11 @@ public interface ProgressBarConsumer extends Consumer<String>, Appendable, AutoC
      */
     void accept(String rendered);
 
+    /** Clears the progress bar from the display. */
+    default void clear() {
+        accept("\r" + Util.repeat(' ', getMaxRenderedLength()) + "\r");
+    }
+
     default ProgressBarConsumer append(CharSequence csq) {
         accept(csq.toString());
         return this;