Revert "Switch to LGoodDatePicker (JabRef#2340)"

This reverts commit 8556e65.

build.gradle

@@ -121,9 +121,6 @@ dependencies {
     compile 'org.xmlunit:xmlunit-core:2.3.0'
     compile 'org.xmlunit:xmlunit-matchers:2.3.0'
 
-
-    compile 'com.github.lgooddatepicker:LGoodDatePicker:8.3.0'
-
     testCompile 'junit:junit:4.12'
     testCompile 'org.mockito:mockito-core:2.3.0'
     testCompile 'com.github.tomakehurst:wiremock:2.4.1'

external-libraries.txt

@@ -137,10 +137,11 @@ Project: SwingX
 URL:     https://swingx.java.net/
 License: LGPL-3.0
 
-Id:      com.github.lgooddatepicker:LGoodDatePicker
-Project: LGoodDatePicker
-URL:     https://github.com/LGoodDatePicker/LGoodDatePicker
-License: MIT
+Id:      microba
+Path:    lib/microba.jar
+Project: Microba
+URL:     https://github.com/tdbear/microba
+License: BSD
 
 Id:      spin
 Path:    lib/spin.jar

src/main/java/net/sf/jabref/gui/IconTheme.java

@@ -158,7 +158,6 @@ public enum JabRefIcon {
         FACEBOOK("\uf20c"), /* css: facebook */
         BLOG("\uf46b"), /* css: rss */
         GLOBAL_SEARCH("\uF1E7"), /* css: earth */
-        DATE_PICKER("\uF0ED;"), /* css: calendar */
         // STILL MISSING:
         GROUP_REGULAR("\uF4E6", Color.RED);
 

src/main/java/net/sf/jabref/logic/util/date/EasyDateFormat.java

@@ -0,0 +1,63 @@
+package net.sf.jabref.logic.util.date;
+
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.Date;
+
+public class EasyDateFormat {
+
+    /**
+     * The formatter objects
+     */
+    private final DateTimeFormatter dateFormatter;
+
+
+    public EasyDateFormat(String dateFormat) {
+        this(DateTimeFormatter.ofPattern(dateFormat));
+    }
+
+    public EasyDateFormat(DateTimeFormatter dateFormatter) {
+        this.dateFormatter = dateFormatter;
+    }
+
+    /**
+     * Creates a String containing the current date (and possibly time),
+     * formatted according to the format set in preferences under the key
+     * "timeStampFormat".
+     *
+     * @return The date string.
+     */
+    public String getCurrentDate() {
+        return getDateAt(ZonedDateTime.now());
+    }
+
+    /**
+     * Creates a readable Date string from the parameter date. The format is set
+     * in preferences under the key "timeStampFormat".
+     *
+     * @return The formatted date string.
+     */
+    public String getDateAt(Date date) {
+        return getDateAt(date.toInstant().atZone(ZoneId.systemDefault()));
+    }
+
+    /**
+     * Creates a readable Date string from the parameter date. The format is set
+     * in preferences under the key "timeStampFormat".
+     *
+     * @return The formatted date string.
+     */
+    public String getDateAt(ZonedDateTime dateTime) {
+        // first use, create an instance
+        return dateTime.format(dateFormatter);
+    }
+
+    public static EasyDateFormat fromTimeStampFormat(String timeStampFormat) {
+        return new EasyDateFormat(timeStampFormat);
+    }
+
+    public static EasyDateFormat isoDateFormat() {
+        return new EasyDateFormat(DateTimeFormatter.ISO_LOCAL_DATE);
+    }
+}