Add paragraph alignment setting (justify/left/center/right) (#191)

## Summary

* **What is the goal of this PR?** 

Add a new user setting for paragraph alignment, instead of hard-coding
full justification.

* **What changes are included?**

One new line in the settings screen, with 4 options
(justify/left/center/right). Default is justified since that's what it
was already. I personally only wanted to disable justification and use
"left", but I included the other options for completeness since they
were already supported.

## Additional Context

Tested on my X4 and looks as expected for each alignment.

Co-authored-by: Maeve Andrews <maeve@git.mail.maeveandrews.com>

src/CrossPointSettings.cpp

@@ -12,7 +12,7 @@ CrossPointSettings CrossPointSettings::instance;
 namespace {
 constexpr uint8_t SETTINGS_FILE_VERSION = 1;
 // Increment this when adding new persisted settings fields
-constexpr uint8_t SETTINGS_COUNT = 10;
+constexpr uint8_t SETTINGS_COUNT = 11;
 constexpr char SETTINGS_FILE[] = "/.crosspoint/settings.bin";
 }  // namespace
 
@@ -37,6 +37,7 @@ bool CrossPointSettings::saveToFile() const {
   serialization::writePod(outputFile, fontFamily);
   serialization::writePod(outputFile, fontSize);
   serialization::writePod(outputFile, lineSpacing);
+  serialization::writePod(outputFile, paragraphAlignment);
   outputFile.close();
 
   Serial.printf("[%lu] [CPS] Settings saved to file\n", millis());
@@ -83,6 +84,8 @@ bool CrossPointSettings::loadFromFile() {
     if (++settingsRead >= fileSettingsCount) break;
     serialization::readPod(inputFile, lineSpacing);
     if (++settingsRead >= fileSettingsCount) break;
+    serialization::readPod(inputFile, paragraphAlignment);
+    if (++settingsRead >= fileSettingsCount) break;
   } while (false);
 
   inputFile.close();

src/CrossPointSettings.h

@@ -43,6 +43,7 @@ class CrossPointSettings {
   // Font size options
   enum FONT_SIZE { SMALL = 0, MEDIUM = 1, LARGE = 2, EXTRA_LARGE = 3 };
   enum LINE_COMPRESSION { TIGHT = 0, NORMAL = 1, WIDE = 2 };
+  enum PARAGRAPH_ALIGNMENT { JUSTIFIED = 0, LEFT_ALIGN = 1, CENTER_ALIGN = 2, RIGHT_ALIGN = 3 };
 
   // Sleep screen settings
   uint8_t sleepScreen = DARK;
@@ -62,6 +63,7 @@ class CrossPointSettings {
   uint8_t fontFamily = BOOKERLY;
   uint8_t fontSize = MEDIUM;
   uint8_t lineSpacing = NORMAL;
+  uint8_t paragraphAlignment = JUSTIFIED;
 
   ~CrossPointSettings() = default;
 

src/activities/reader/EpubReaderActivity.cpp

@@ -267,7 +267,8 @@ void EpubReaderActivity::renderScreen() {
     const uint16_t viewportHeight = renderer.getScreenHeight() - orientedMarginTop - orientedMarginBottom;
 
     if (!section->loadSectionFile(SETTINGS.getReaderFontId(), SETTINGS.getReaderLineCompression(),
-                                  SETTINGS.extraParagraphSpacing, viewportWidth, viewportHeight)) {
+                                  SETTINGS.extraParagraphSpacing, SETTINGS.paragraphAlignment, viewportWidth,
+                                  viewportHeight)) {
       Serial.printf("[%lu] [ERS] Cache not found, building...\n", millis());
 
       // Progress bar dimensions
@@ -311,8 +312,8 @@ void EpubReaderActivity::renderScreen() {
       };
 
       if (!section->createSectionFile(SETTINGS.getReaderFontId(), SETTINGS.getReaderLineCompression(),
-                                      SETTINGS.extraParagraphSpacing, viewportWidth, viewportHeight, progressSetup,
-                                      progressCallback)) {
+                                      SETTINGS.extraParagraphSpacing, SETTINGS.paragraphAlignment, viewportWidth,
+                                      viewportHeight, progressSetup, progressCallback)) {
         Serial.printf("[%lu] [ERS] Failed to persist page data to SD\n", millis());
         section.reset();
         return;

src/activities/settings/SettingsActivity.cpp

@@ -9,7 +9,7 @@
 
 // Define the static settings list
 namespace {
-constexpr int settingsCount = 11;
+constexpr int settingsCount = 12;
 const SettingInfo settingsList[settingsCount] = {
     // Should match with SLEEP_SCREEN_MODE
     {"Sleep Screen", SettingType::ENUM, &CrossPointSettings::sleepScreen, {"Dark", "Light", "Custom", "Cover"}},
@@ -34,6 +34,10 @@ const SettingInfo settingsList[settingsCount] = {
      {"Bookerly", "Noto Sans", "Open Dyslexic"}},
     {"Reader Font Size", SettingType::ENUM, &CrossPointSettings::fontSize, {"Small", "Medium", "Large", "X Large"}},
     {"Reader Line Spacing", SettingType::ENUM, &CrossPointSettings::lineSpacing, {"Tight", "Normal", "Wide"}},
+    {"Reader Paragraph Alignment",
+     SettingType::ENUM,
+     &CrossPointSettings::paragraphAlignment,
+     {"Justify", "Left", "Center", "Right"}},
     {"Check for updates", SettingType::ACTION, nullptr, {}},
 };
 }  // namespace