Show suggestion help

app/src/main/java/eu/faircode/email/SuggestionSpanEx.java

@@ -0,0 +1,70 @@
+package eu.faircode.email;
+
+/*
+    This file is part of FairEmail.
+
+    FairEmail is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    FairEmail is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with FairEmail.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2018-2023 by Marcel Bokhorst (M66B)
+*/
+
+import android.content.Context;
+import android.graphics.Color;
+import android.os.Build;
+import android.text.TextPaint;
+import android.text.style.SuggestionSpan;
+
+import java.lang.reflect.Field;
+
+public class SuggestionSpanEx extends SuggestionSpan {
+    private String description;
+    private final int highlightColor;
+    private final int underlineColor;
+    private final int underlineThickness;
+
+    public SuggestionSpanEx(Context context, String description, String[] suggestions, boolean misspelled) {
+        super(context, suggestions,
+                misspelled || Build.VERSION.SDK_INT < Build.VERSION_CODES.S
+                        ? SuggestionSpan.FLAG_MISSPELLED | SuggestionSpan.FLAG_EASY_CORRECT
+                        : SuggestionSpan.FLAG_GRAMMAR_ERROR);
+        this.description = description;
+        highlightColor = Helper.resolveColor(context, android.R.attr.textColorHighlight);
+        underlineColor = (misspelled ? Color.RED : highlightColor);
+        underlineThickness = Helper.dp2pixels(context, misspelled ? 2 : 2);
+    }
+
+    public String getDescription() {
+        return this.description;
+    }
+
+    @Override
+    public void updateDrawState(TextPaint tp) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q)
+            try {
+                Field fUnderlineColor = tp.getClass().getDeclaredField("underlineColor");
+                Field fUnderlineThickness = tp.getClass().getDeclaredField("underlineThickness");
+                fUnderlineColor.setAccessible(true);
+                fUnderlineThickness.setAccessible(true);
+                fUnderlineColor.set(tp, underlineColor);
+                fUnderlineThickness.set(tp, underlineThickness);
+            } catch (Throwable ex) {
+                Log.i(ex);
+                tp.bgColor = highlightColor;
+            }
+        else {
+            tp.underlineColor = underlineColor;
+            tp.underlineThickness = underlineThickness;
+        }
+    }
+}