more pronounced day/month delimiters in the transaction list

[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / utils / Misc.java

diff --git a/app/src/main/java/net/ktnx/mobileledger/utils/Misc.java b/app/src/main/java/net/ktnx/mobileledger/utils/Misc.java
index c75b6339ae0fb0b074deed2d2088ed7c0e811fd2..67dc0958686a9722f15b3f797d3634740c531dbc 100644 (file)
--- a/app/src/main/java/net/ktnx/mobileledger/utils/Misc.java
+++ b/app/src/main/java/net/ktnx/mobileledger/utils/Misc.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2020 Damyan Ivanov.
+ * Copyright © 2021 Damyan Ivanov.
  * This file is part of MoLe.
  * MoLe is free software: you can distribute it and/or modify it
  * under the term of the GNU General Public License as published by
@@ -19,6 +19,8 @@ package net.ktnx.mobileledger.utils;
 
 import android.app.Activity;
 import android.content.res.Configuration;
+import android.os.Handler;
+import android.os.Looper;
 import android.text.Editable;
 import android.view.WindowManager;
 
@@ -26,10 +28,14 @@ import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentActivity;
 
+import org.jetbrains.annotations.Contract;
+
 public class Misc {
+    public static final char ZERO_WIDTH_SPACE = '\u200B';
     public static boolean isZero(float f) {
         return (f < 0.005) && (f > -0.005);
     }
+    public static boolean equalFloats(float a, float b) { return isZero(a - b); }
     public static void showSoftKeyboard(Activity activity) {
         // make the keyboard appear
         Configuration cf = activity.getResources()
@@ -59,7 +65,7 @@ public class Misc {
 
     }
     public static String emptyIsNull(String str) {
-        return "".equals(str) ? null : str;
+        return str != null && str.isEmpty() ? null : str;
     }
     public static String nullIsEmpty(String str) {
         return (str == null) ? "" : str;
@@ -81,4 +87,43 @@ public class Misc {
 
         return string.trim();
     }
+    @Contract(value = "null, null -> true; null, !null -> false; !null, null -> false", pure = true)
+    public static boolean equalIntegers(Integer a, Integer b) {
+        if (a == null && b == null)
+            return true;
+        if (a == null || b == null)
+            return false;
+
+        return a.equals(b);
+    }
+    @Contract(value = "null, null -> true; null, !null -> false; !null, null -> false", pure = true)
+    public static boolean equalLongs(Long a, Long b) {
+        if (a == null && b == null)
+            return true;
+        if (a == null || b == null)
+            return false;
+
+        return a.equals(b);
+    }
+    public static void onMainThread(Runnable r) {
+        new Handler(Looper.getMainLooper()).post(r);
+    }
+    public static String addWrapHints(String input) {
+        if (input == null)
+            return null;
+        StringBuilder result = new StringBuilder();
+        int lastPos = 0;
+        int pos = input.indexOf(':');
+
+        while (pos >= 0) {
+            result.append(input.substring(lastPos, pos + 1))
+                  .append(ZERO_WIDTH_SPACE);
+            lastPos = pos + 1;
+            pos = input.indexOf(':', lastPos + 1);
+        }
+        if (lastPos > 0)
+            result.append(input.substring(lastPos));
+
+        return result.toString();
+    }
 }