Restore selected editor position on rotate, etc

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

@@ -1347,6 +1347,9 @@ public class FragmentCompose extends FragmentBase {
         outState.putInt("fair:pickRequest", pickRequest);
         outState.putParcelable("fair:pickUri", pickUri);
 
+        outState.putInt("fair:start", etBody.getSelectionStart());
+        outState.putInt("fair:end", etBody.getSelectionEnd());
+
         super.onSaveInstanceState(outState);
     }
 
@@ -1398,6 +1401,7 @@ public class FragmentCompose extends FragmentBase {
                     Bundle args = new Bundle();
                     args.putString("action", "edit");
                     args.putLong("id", working);
+
                     draftLoader.execute(FragmentCompose.this, args, "compose:edit");
                 }
             } else {
@@ -1411,6 +1415,10 @@ public class FragmentCompose extends FragmentBase {
                 Bundle args = new Bundle();
                 args.putString("action", working < 0 ? "new" : "edit");
                 args.putLong("id", working);
+
+                args.putInt("start", savedInstanceState.getInt("fair:start"));
+                args.putInt("end", savedInstanceState.getInt("fair:end"));
+
                 draftLoader.execute(FragmentCompose.this, args, "compose:instance");
             }
         } catch (Throwable ex) {
@@ -5228,7 +5236,7 @@ public class FragmentCompose extends FragmentBase {
                                 };
                             }
 
-                            showDraft(draft, false, postShow);
+                            showDraft(draft, false, postShow, args.getInt("start"), args.getInt("end"));
                         }
 
                         tvDsn.setVisibility(
@@ -6041,7 +6049,7 @@ public class FragmentCompose extends FragmentBase {
             boolean show = extras.getBoolean("show");
             boolean refedit = extras.getBoolean("refedit");
             if (show)
-                showDraft(draft, refedit, null);
+                showDraft(draft, refedit, null, -1, -1);
 
             bottom_navigation.getMenu().findItem(R.id.action_undo).setVisible(draft.revision > 1);
             bottom_navigation.getMenu().findItem(R.id.action_redo).setVisible(draft.revision < draft.revisions);
@@ -6062,7 +6070,7 @@ public class FragmentCompose extends FragmentBase {
                 finish();
 
             } else if (action == R.id.action_undo || action == R.id.action_redo) {
-                showDraft(draft, false, null);
+                showDraft(draft, false, null, -1, -1);
 
             } else if (action == R.id.action_save) {
                 boolean autosave = extras.getBoolean("autosave");
@@ -6224,7 +6232,7 @@ public class FragmentCompose extends FragmentBase {
                 ref.first().before(div);
     }
 
-    private void showDraft(final EntityMessage draft, boolean refedit, Runnable postShow) {
+    private void showDraft(final EntityMessage draft, boolean refedit, Runnable postShow, int selStart, int selEnd) {
         Bundle args = new Bundle();
         args.putLong("id", draft.id);
         args.putBoolean("show_images", show_images);
@@ -6395,7 +6403,7 @@ public class FragmentCompose extends FragmentBase {
                     return;
                 state = State.LOADED;
 
-                setFocus(null, -1, -1, postShow == null);
+                setFocus(selStart > 0 ? R.id.etBody : null, selStart, selEnd, postShow == null);
                 if (postShow != null)
                     getMainHandler().post(postShow);
             }