Added option to show preformatted text monospaced

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

@@ -85,7 +85,7 @@ public class FragmentOptions extends FragmentBase {
             "subject_top", "font_size_sender", "font_size_subject", "subject_italic", "highlight_subject", "subject_ellipsize",
             "keywords_header", "labels_header", "flags", "flags_background", "preview", "preview_italic", "preview_lines",
             "message_zoom", "overview_mode", "addresses", "attachments_alt", "thumbnails",
-            "contrast", "monospaced",
+            "contrast", "monospaced", "monospaced_pre",
             "text_color", "text_size", "text_font", "text_align", "text_separators",
             "inline_images", "collapse_quotes", "seekbar", "actionbar", "actionbar_color", "navbar_colorize",
             "autoscroll", "swipenav", "swipe_close", "swipe_move", "autoexpand", "autoclose", "onclose",

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

@@ -119,6 +119,7 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
 
     private SwitchCompat swContrast;
     private SwitchCompat swMonospaced;
+    private SwitchCompat swMonospacedPre;
     private SwitchCompat swTextColor;
     private SwitchCompat swTextSize;
     private SwitchCompat swTextFont;
@@ -142,7 +143,7 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
             "keywords_header", "labels_header", "flags", "flags_background",
             "preview", "preview_italic", "preview_lines",
             "addresses",
-            "message_zoom", "overview_mode", "contrast", "monospaced",
+            "message_zoom", "overview_mode", "contrast", "monospaced", "monospaced_pre",
             "text_color", "text_size", "text_font", "text_align", "text_separators",
             "inline_images", "collapse_quotes", "attachments_alt", "thumbnails",
             "parse_classes", "authentication"
@@ -213,6 +214,7 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
         swOverviewMode = view.findViewById(R.id.swOverviewMode);
         swContrast = view.findViewById(R.id.swContrast);
         swMonospaced = view.findViewById(R.id.swMonospaced);
+        swMonospacedPre = view.findViewById(R.id.swMonospacedPre);
         swTextColor = view.findViewById(R.id.swTextColor);
         swTextSize = view.findViewById(R.id.swTextSize);
         swTextFont = view.findViewById(R.id.swTextFont);
@@ -716,6 +718,13 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
             }
         });
 
+        swMonospacedPre.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
+                prefs.edit().putBoolean("monospaced_pre", checked).apply();
+            }
+        });
+
         swTextColor.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
@@ -952,6 +961,7 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
 
         swContrast.setChecked(prefs.getBoolean("contrast", false));
         swMonospaced.setChecked(prefs.getBoolean("monospaced", false));
+        swMonospacedPre.setChecked(prefs.getBoolean("monospaced_pre", false));
         swTextColor.setChecked(prefs.getBoolean("text_color", true));
         swTextSize.setChecked(prefs.getBoolean("text_size", true));
         swTextFont.setChecked(prefs.getBoolean("text_font", true));

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

@@ -1897,6 +1897,7 @@ public class HtmlHelper {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         boolean debug = prefs.getBoolean("debug", false);
         boolean text_separators = prefs.getBoolean("text_separators", false);
+        boolean monospaced_pre = prefs.getBoolean("monospaced_pre", false);
 
         final int colorPrimary = Helper.resolveColor(context, R.attr.colorPrimary);
         final int colorAccent = Helper.resolveColor(context, R.attr.colorAccent);
@@ -2043,7 +2044,12 @@ public class HtmlHelper {
                         ssb.append("[" + element.tagName() + ":" + element.attr("style") + "]");
                 } else if (node instanceof TextNode) {
                     tnode = (TextNode) node;
-                    ssb.append(tnode.getWholeText());
+                    String text = tnode.getWholeText();
+                    ssb.append(text);
+                    if (monospaced_pre &&
+                            node.parent() instanceof Element &&
+                            "true".equals(((Element) node.parent()).attr("x-plain")))
+                        setSpan(ssb, new TypefaceSpan("monospace"), ssb.length() - text.length(), ssb.length());
                 }
             }
 

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

@@ -925,6 +925,17 @@
             app:layout_constraintTop_toBottomOf="@id/swContrast"
             app:switchPadding="12dp" />
 
+        <androidx.appcompat.widget.SwitchCompat
+            android:id="@+id/swMonospacedPre"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:text="@string/title_advanced_monospaced_pre"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/swMonospaced"
+            app:switchPadding="12dp" />
+
         <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/swTextColor"
             android:layout_width="0dp"
@@ -934,7 +945,7 @@
             android:text="@string/title_advanced_text_color"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/swMonospaced"
+            app:layout_constraintTop_toBottomOf="@id/swMonospacedPre"
             app:switchPadding="12dp" />
 
         <androidx.appcompat.widget.SwitchCompat

app/src/main/res/values/strings.xml

@@ -385,6 +385,7 @@
     <string name="title_advanced_overview_mode">Zoom original messages to fit the screen</string>
     <string name="title_advanced_contrast">Use high contrast for message text</string>
     <string name="title_advanced_monospaced">Use monospaced font for message text by default</string>
+    <string name="title_advanced_monospaced_pre">Use monospaced font for preformatted text</string>
     <string name="title_advanced_text_color">Use text colors</string>
     <string name="title_advanced_text_size">Use text sizes</string>
     <string name="title_advanced_text_font">Use fonts</string>