Initial modularization of core image editor code.

core-util/src/main/java/org/signal/core/util/DimensionUnit.java

@@ -0,0 +1,73 @@
+package org.signal.core.util;
+
+import android.content.res.Resources;
+
+import androidx.annotation.Dimension;
+import androidx.annotation.Px;
+
+/**
+ * Core utility for converting different dimensional values.
+ */
+public enum DimensionUnit {
+  PIXELS {
+    @Override
+    @Px
+    public float toPixels(@Px float pixels) {
+      return pixels;
+    }
+
+    @Override
+    @Dimension(unit = Dimension.DP)
+    public float toDp(@Px float pixels) {
+      return pixels / Resources.getSystem().getDisplayMetrics().density;
+    }
+
+    @Override
+    @Dimension(unit = Dimension.SP)
+    public float toSp(@Px float pixels) {
+      return pixels / Resources.getSystem().getDisplayMetrics().scaledDensity;
+    }
+  },
+  DP {
+    @Override
+    @Px
+    public float toPixels(@Dimension(unit = Dimension.DP) float dp) {
+      return dp * Resources.getSystem().getDisplayMetrics().density;
+    }
+
+    @Override
+    @Dimension(unit = Dimension.DP)
+    public float toDp(@Dimension(unit = Dimension.DP) float dp) {
+      return dp;
+    }
+
+    @Override
+    @Dimension(unit = Dimension.SP)
+    public float toSp(@Dimension(unit = Dimension.DP) float dp) {
+      return PIXELS.toSp(toPixels(dp));
+    }
+  },
+  SP {
+    @Override
+    @Px
+    public float toPixels(@Dimension(unit = Dimension.SP) float sp) {
+      return sp * Resources.getSystem().getDisplayMetrics().scaledDensity;
+    }
+
+    @Override
+    @Dimension(unit = Dimension.DP)
+    public float toDp(@Dimension(unit = Dimension.SP) float sp) {
+      return PIXELS.toDp(toPixels(sp));
+    }
+
+    @Override
+    @Dimension(unit = Dimension.SP)
+    public float toSp(@Dimension(unit = Dimension.SP) float sp) {
+      return sp;
+    }
+  };
+
+  public abstract float toPixels(float value);
+  public abstract float toDp(float value);
+  public abstract float toSp(float value);
+}

core-util/src/main/res/drawable/ic_trash_white_24.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FFFFFFFF"
+      android:pathData="M22,4.5L16.35,4.5a4.45,4.45 0,0 0,-8.7 0L2,4.5L2,6L3.5,6L4.86,20A2.25,2.25 0,0 0,7.1 22h9.8a2.25,2.25 0,0 0,2.24 -2L20.5,6L22,6ZM12,2.5a3,3 0,0 1,2.82 2L9.18,4.5A3,3 0,0 1,12 2.5ZM17.65,19.83a0.76,0.76 0,0 1,-0.75 0.67L7.1,20.5a0.76,0.76 0,0 1,-0.75 -0.67L5,6L19,6ZM11.25,18L11.25,8h1.5L12.75,18ZM14.5,18L15,8h1.5L16,18ZM8,18 L7.5,8L9,8l0.5,10Z"/>
+</vector>