Allow override width and fit to width

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

@@ -2612,7 +2612,8 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                         boolean overview_mode = prefs.getBoolean("overview_mode", false);
                         boolean override_width = prefs.getBoolean("override_width", false);
                         HtmlHelper.setViewport(document, overview_mode);
-                        HtmlHelper.overrideWidth(document, overview_mode);
+                        if (override_width)
+                            HtmlHelper.overrideWidth(document);
                         if (inline || show_images)
                             HtmlHelper.embedInlineImages(context, message.id, document, show_images);
 
@@ -5545,7 +5546,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                         boolean override_width = prefs.getBoolean("override_width", false);
                         HtmlHelper.setViewport(d, overview_mode);
                         if (override_width)
-                            HtmlHelper.overrideWidth(d, overview_mode);
+                            HtmlHelper.overrideWidth(d);
                     }
 
                     List<CSSStyleSheet> sheets =

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

@@ -900,7 +900,6 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
                 prefs.edit().putBoolean("overview_mode", checked).apply();
-                swOverrideWidth.setEnabled(!checked);
             }
         });
 
@@ -1224,7 +1223,6 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
 
         swOverviewMode.setChecked(prefs.getBoolean("overview_mode", false));
         swOverrideWidth.setChecked(prefs.getBoolean("override_width", false));
-        swOverrideWidth.setEnabled(!swOverviewMode.isChecked());
 
         swContrast.setChecked(prefs.getBoolean("contrast", false));
         swMonospaced.setChecked(prefs.getBoolean("monospaced", false));

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

@@ -36,7 +36,6 @@ import android.os.Build;
 import android.text.Html;
 import android.text.Layout;
 import android.text.Spannable;
-import android.text.SpannableString;
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
 import android.text.TextDirectionHeuristics;
@@ -2068,23 +2067,24 @@ public class HtmlHelper {
             Log.i(document.head().html());
     }
 
-    static void overrideWidth(Document document, boolean overview_mode) {
-        if (!overview_mode) {
-            for (Element e : document.select("*")) {
-                String width = e.attr("width");
-                if (TextUtils.isEmpty(width))
-                    continue;
-                e.attr("style", mergeStyles(
-                        e.attr("style"),
-                        "width: " + width));
-                e.removeAttr("width");
-            }
-
-            for (Element e : document.body().children())
-                e.attr("style", mergeStyles(
-                        e.attr("style"),
-                        "min-width: 0 !important; max-width: 100% !important;"));
+    static void overrideWidth(Document document) {
+        List<String> tags = new ArrayList<>();
+        for (Element e : document.select("*")) {
+            String tag = e.tagName();
+            if ("img".equals(tag))
+                continue;
+            if (tags.contains(tag))
+                continue;
+            tags.add(tag);
         }
+
+        StringBuilder sb = new StringBuilder();
+        sb.append("<style type=\"text/css\">");
+        for (String tag : tags)
+            sb.append(tag).append("{width: auto !important; min-width: 0 !important;max-width: 100% !important;}");
+        sb.append("</style>");
+
+        document.select("head").append(sb.toString());
     }
 
     static String getLanguage(Context context, String subject, String text) {

app/src/main/res/layout/fragment_options_display.xml

@@ -1352,7 +1352,6 @@
                     android:id="@+id/swOverrideWidth"
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
-                    android:layout_marginStart="12dp"
                     android:layout_marginTop="12dp"
                     android:text="@string/title_advanced_override_width"
                     app:layout_constraintEnd_toEndOf="parent"
@@ -1364,7 +1363,6 @@
                     android:id="@+id/tvOverrideWidthHint"
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
-                    android:layout_marginStart="12dp"
                     android:layout_marginEnd="48dp"
                     android:text="@string/title_advanced_override_width_hint"
                     android:textAppearance="@style/TextAppearance.AppCompat.Small"