feat: Add Chapter Progress Bar status bar option (#636)

## Summary
This pull request introduces a new "Chapter Progress Bar" mode to the
status bar, allowing users to track their progress within the current
chapter in addition to the existing book-level progress options. It also
unifies and increases the progress bar height for better visibility, and
updates the settings UI to support the new mode.

Closes #636

**Status Bar/Progress Bar Enhancements:**

* Added a new `CHAPTER_PROGRESS_BAR` mode to
`CrossPointSettings::STATUS_BAR_MODE`, and updated the settings UI to
allow users to select this mode.
[[1]](diffhunk://#diff-3af36372bb6233a83387a68091b5e0651c23585c7c0a95669ed893268ca709a8R34)
[[2]](diffhunk://#diff-c55df9ec3ade843be000ba463cb75aa3df27dc34620a56c248fc4cc4e917b34bL22-R23)
* Implemented `drawChapterProgressBar` in `ScreenComponents` and
integrated it into both EPUB and TXT reader activities, so the chapter
progress bar is displayed when the new mode is selected.
[[1]](diffhunk://#diff-be271778a942f7fab0d920acd73442512346ff811a4625c011275a7ca6be3a3eL51-R64)
[[2]](diffhunk://#diff-dd410cab3a363d78172706d2ad6591f327e9b5b05f314db405db31a667af03faL16-R20)
[[3]](diffhunk://#diff-82798dedbe135495e619d4aa27a4bef560c70c7663cf43148b67a26ddde45682R518-R525)
[[4]](diffhunk://#diff-471ba9d9eb65b1a8451d41246db2aa695a42ea4ae4762163adfda4c20fec0950R563-R567)
* Updated logic in EPUB and TXT reader activities to show the correct
progress bar, progress text, and battery indicator based on the selected
status bar mode, including the new chapter progress bar mode.
[[1]](diffhunk://#diff-82798dedbe135495e619d4aa27a4bef560c70c7663cf43148b67a26ddde45682R470-R481)
[[2]](diffhunk://#diff-82798dedbe135495e619d4aa27a4bef560c70c7663cf43148b67a26ddde45682L490-R503)
[[3]](diffhunk://#diff-471ba9d9eb65b1a8451d41246db2aa695a42ea4ae4762163adfda4c20fec0950R522-R533)
[[4]](diffhunk://#diff-471ba9d9eb65b1a8451d41246db2aa695a42ea4ae4762163adfda4c20fec0950L539-R548)

**UI/Visual Tweaks:**

* Increased the progress bar height from 4 to 6 pixels for improved
visibility, and refactored code to use the new constant.
[[1]](diffhunk://#diff-dd410cab3a363d78172706d2ad6591f327e9b5b05f314db405db31a667af03faL16-R20)
[[2]](diffhunk://#diff-82798dedbe135495e619d4aa27a4bef560c70c7663cf43148b67a26ddde45682L295-R295)
[[3]](diffhunk://#diff-471ba9d9eb65b1a8451d41246db2aa695a42ea4ae4762163adfda4c20fec0950L177-R177)

These changes collectively provide users with more granular progress
tracking options and a clearer visual indicator for reading progress.


## Additional Context



---

### AI Usage

Did you use AI tools to help write this code? _**YES**_

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

USER_GUIDE.md

@@ -13,12 +13,14 @@ Welcome to the **CrossPoint** firmware. This guide outlines the hardware control
     - [3.2 Book Selection](#32-book-selection)
     - [3.3 Reading Mode](#33-reading-mode)
     - [3.4 File Upload Screen](#34-file-upload-screen)
+    - [3.4.1 Calibre Wireless Transfers](#341-calibre-wireless-transfers)
     - [3.5 Settings](#35-settings)
     - [3.6 Sleep Screen](#36-sleep-screen)
   - [4. Reading Mode](#4-reading-mode)
     - [Page Turning](#page-turning)
     - [Chapter Navigation](#chapter-navigation)
     - [System Navigation](#system-navigation)
+    - [Supported Languages](#supported-languages)
   - [5. Chapter Selection Screen](#5-chapter-selection-screen)
   - [6. Current Limitations \& Roadmap](#6-current-limitations--roadmap)
   - [7. Troubleshooting Issues \& Escaping Bootloop](#7-troubleshooting-issues--escaping-bootloop)
@@ -114,7 +116,10 @@ The Settings screen allows you to configure the device's behavior. There are a f
 - **Status Bar**: Configure the status bar displayed while reading:
   - "None" - No status bar
   - "No Progress" - Show status bar without reading progress
-  - "Full" - Show status bar with reading progress
+  - "Full w/ Percentage" - Show status bar with book progress (as percentage)
+  - "Full w/ Book Bar" - Show status bar with book progress (as bar)
+  - "Book Bar Only" - Show book progress (as bar)
+  - "Full w/ Chapter Bar" - Show status bar with chapter progress (as bar)
 - **Hide Battery %**: Configure where to suppress the battery pecentage display in the status bar; the battery icon will still be shown:
   - "Never" - Always show battery percentage (default)
   - "In Reader" - Show battery percentage everywhere except in reading mode

src/CrossPointSettings.h

@@ -37,8 +37,9 @@ class CrossPointSettings {
     NONE = 0,
     NO_PROGRESS = 1,
     FULL = 2,
-    FULL_WITH_PROGRESS_BAR = 3,
+    BOOK_PROGRESS_BAR = 3,
-    ONLY_PROGRESS_BAR = 4,
+    ONLY_BOOK_PROGRESS_BAR = 4,
+    CHAPTER_PROGRESS_BAR = 5,
     STATUS_BAR_MODE_COUNT
   };
 

src/activities/reader/EpubReaderActivity.cpp

@@ -558,8 +558,9 @@ void EpubReaderActivity::renderScreen() {
   // Add status bar margin
   if (SETTINGS.statusBar != CrossPointSettings::STATUS_BAR_MODE::NONE) {
     // Add additional margin for status bar if progress bar is shown
-    const bool showProgressBar = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL_WITH_PROGRESS_BAR ||
+    const bool showProgressBar = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::BOOK_PROGRESS_BAR ||
-                                 SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::ONLY_PROGRESS_BAR;
+                                 SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::ONLY_BOOK_PROGRESS_BAR ||
+                                 SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::CHAPTER_PROGRESS_BAR;
     orientedMarginBottom += statusBarMargin - SETTINGS.screenMargin +
                             (showProgressBar ? (metrics.bookProgressBarHeight + progressBarMarginTop) : 0);
   }
@@ -713,16 +714,20 @@ void EpubReaderActivity::renderStatusBar(const int orientedMarginRight, const in
 
   // determine visible status bar elements
   const bool showProgressPercentage = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL;
-  const bool showProgressBar = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL_WITH_PROGRESS_BAR ||
+  const bool showBookProgressBar = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::BOOK_PROGRESS_BAR ||
-                               SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::ONLY_PROGRESS_BAR;
+                                   SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::ONLY_BOOK_PROGRESS_BAR;
+  const bool showChapterProgressBar = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::CHAPTER_PROGRESS_BAR;
   const bool showProgressText = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL ||
-                                SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL_WITH_PROGRESS_BAR;
+                                SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::BOOK_PROGRESS_BAR;
+  const bool showBookPercentage = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::CHAPTER_PROGRESS_BAR;
   const bool showBattery = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::NO_PROGRESS ||
                            SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL ||
-                           SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL_WITH_PROGRESS_BAR;
+                           SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::BOOK_PROGRESS_BAR ||
+                           SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::CHAPTER_PROGRESS_BAR;
   const bool showChapterTitle = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::NO_PROGRESS ||
                                 SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL ||
-                                SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL_WITH_PROGRESS_BAR;
+                                SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::BOOK_PROGRESS_BAR ||
+                                SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::CHAPTER_PROGRESS_BAR;
   const bool showBatteryPercentage =
       SETTINGS.hideBatteryPercentage == CrossPointSettings::HIDE_BATTERY_PERCENTAGE::HIDE_NEVER;
 
@@ -735,7 +740,7 @@ void EpubReaderActivity::renderStatusBar(const int orientedMarginRight, const in
   const float sectionChapterProg = static_cast<float>(section->currentPage) / section->pageCount;
   const float bookProgress = epub->calculateProgress(currentSpineIndex, sectionChapterProg) * 100;
 
-  if (showProgressText || showProgressPercentage) {
+  if (showProgressText || showProgressPercentage || showBookPercentage) {
     // Right aligned text for progress counter
     char progressStr[32];
 
@@ -743,6 +748,8 @@ void EpubReaderActivity::renderStatusBar(const int orientedMarginRight, const in
     if (showProgressPercentage) {
       snprintf(progressStr, sizeof(progressStr), "%d/%d  %.0f%%", section->currentPage + 1, section->pageCount,
                bookProgress);
+    } else if (showBookPercentage) {
+      snprintf(progressStr, sizeof(progressStr), "%.0f%%", bookProgress);
     } else {
       snprintf(progressStr, sizeof(progressStr), "%d/%d", section->currentPage + 1, section->pageCount);
     }
@@ -752,9 +759,16 @@ void EpubReaderActivity::renderStatusBar(const int orientedMarginRight, const in
                       progressStr);
   }
 
-  if (showProgressBar) {
+  if (showBookProgressBar) {
     // Draw progress bar at the very bottom of the screen, from edge to edge of viewable area
-    GUI.drawBookProgressBar(renderer, static_cast<size_t>(bookProgress));
+    GUI.drawReadingProgressBar(renderer, static_cast<size_t>(bookProgress));
+  }
+
+  if (showChapterProgressBar) {
+    // Draw chapter progress bar at the very bottom of the screen, from edge to edge of viewable area
+    const float chapterProgress =
+        (section->pageCount > 0) ? (static_cast<float>(section->currentPage + 1) / section->pageCount) * 100 : 0;
+    GUI.drawReadingProgressBar(renderer, static_cast<size_t>(chapterProgress));
   }
 
   if (showBattery) {

src/activities/reader/TxtReaderActivity.cpp

@@ -177,8 +177,9 @@ void TxtReaderActivity::initializeReader() {
   // Add status bar margin
   if (SETTINGS.statusBar != CrossPointSettings::STATUS_BAR_MODE::NONE) {
     // Add additional margin for status bar if progress bar is shown
-    const bool showProgressBar = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL_WITH_PROGRESS_BAR ||
+    const bool showProgressBar = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::BOOK_PROGRESS_BAR ||
-                                 SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::ONLY_PROGRESS_BAR;
+                                 SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::ONLY_BOOK_PROGRESS_BAR ||
+                                 SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::CHAPTER_PROGRESS_BAR;
     orientedMarginBottom += statusBarMargin - cachedScreenMargin +
                             (showProgressBar ? (metrics.bookProgressBarHeight + progressBarMarginTop) : 0);
   }
@@ -491,30 +492,37 @@ void TxtReaderActivity::renderPage() {
 void TxtReaderActivity::renderStatusBar(const int orientedMarginRight, const int orientedMarginBottom,
                                         const int orientedMarginLeft) const {
   const bool showProgressPercentage = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL;
-  const bool showProgressBar = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL_WITH_PROGRESS_BAR ||
+  const bool showProgressBar = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::BOOK_PROGRESS_BAR ||
-                               SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::ONLY_PROGRESS_BAR;
+                               SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::ONLY_BOOK_PROGRESS_BAR;
+  const bool showChapterProgressBar = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::CHAPTER_PROGRESS_BAR;
   const bool showProgressText = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL ||
-                                SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL_WITH_PROGRESS_BAR;
+                                SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::BOOK_PROGRESS_BAR;
+  const bool showBookPercentage = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::CHAPTER_PROGRESS_BAR;
   const bool showBattery = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::NO_PROGRESS ||
                            SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL ||
-                           SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL_WITH_PROGRESS_BAR;
+                           SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::BOOK_PROGRESS_BAR ||
+                           SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::CHAPTER_PROGRESS_BAR;
   const bool showTitle = SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::NO_PROGRESS ||
                          SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL ||
-                         SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::FULL_WITH_PROGRESS_BAR;
+                         SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::BOOK_PROGRESS_BAR ||
+                         SETTINGS.statusBar == CrossPointSettings::STATUS_BAR_MODE::CHAPTER_PROGRESS_BAR;
   const bool showBatteryPercentage =
       SETTINGS.hideBatteryPercentage == CrossPointSettings::HIDE_BATTERY_PERCENTAGE::HIDE_NEVER;
 
   auto metrics = UITheme::getInstance().getMetrics();
   const auto screenHeight = renderer.getScreenHeight();
+  // Adjust text position upward when progress bar is shown to avoid overlap
   const auto textY = screenHeight - orientedMarginBottom - 4;
   int progressTextWidth = 0;
 
   const float progress = totalPages > 0 ? (currentPage + 1) * 100.0f / totalPages : 0;
 
-  if (showProgressText || showProgressPercentage) {
+  if (showProgressText || showProgressPercentage || showBookPercentage) {
     char progressStr[32];
     if (showProgressPercentage) {
       snprintf(progressStr, sizeof(progressStr), "%d/%d %.0f%%", currentPage + 1, totalPages, progress);
+    } else if (showBookPercentage) {
+      snprintf(progressStr, sizeof(progressStr), "%.0f%%", progress);
     } else {
       snprintf(progressStr, sizeof(progressStr), "%d/%d", currentPage + 1, totalPages);
     }
@@ -526,7 +534,12 @@ void TxtReaderActivity::renderStatusBar(const int orientedMarginRight, const int
 
   if (showProgressBar) {
     // Draw progress bar at the very bottom of the screen, from edge to edge of viewable area
-    GUI.drawBookProgressBar(renderer, static_cast<size_t>(progress));
+    GUI.drawReadingProgressBar(renderer, static_cast<size_t>(progress));
+  }
+
+  if (showChapterProgressBar) {
+    // For text mode, treat the entire book as one chapter, so chapter progress == book progress
+    GUI.drawReadingProgressBar(renderer, static_cast<size_t>(progress));
   }
 
   if (showBattery) {

src/activities/settings/SettingsActivity.cpp

@@ -25,8 +25,9 @@ const SettingInfo displaySettings[displaySettingsCount] = {
     SettingInfo::Enum("Sleep Screen Cover Mode", &CrossPointSettings::sleepScreenCoverMode, {"Fit", "Crop"}),
     SettingInfo::Enum("Sleep Screen Cover Filter", &CrossPointSettings::sleepScreenCoverFilter,
                       {"None", "Contrast", "Inverted"}),
-    SettingInfo::Enum("Status Bar", &CrossPointSettings::statusBar,
+    SettingInfo::Enum(
-                      {"None", "No Progress", "Full w/ Percentage", "Full w/ Progress Bar", "Progress Bar"}),
+        "Status Bar", &CrossPointSettings::statusBar,
+        {"None", "No Progress", "Full w/ Percentage", "Full w/ Book Bar", "Book Bar Only", "Full w/ Chapter Bar"}),
     SettingInfo::Enum("Hide Battery %", &CrossPointSettings::hideBatteryPercentage, {"Never", "In Reader", "Always"}),
     SettingInfo::Enum("Refresh Frequency", &CrossPointSettings::refreshFrequency,
                       {"1 page", "5 pages", "10 pages", "15 pages", "30 pages"}),

src/components/themes/BaseTheme.cpp

@@ -630,7 +630,7 @@ void BaseTheme::fillPopupProgress(const GfxRenderer& renderer, const Rect& layou
   renderer.displayBuffer(HalDisplay::FAST_REFRESH);
 }
 
-void BaseTheme::drawBookProgressBar(const GfxRenderer& renderer, const size_t bookProgress) const {
+void BaseTheme::drawReadingProgressBar(const GfxRenderer& renderer, const size_t bookProgress) const {
   int vieweableMarginTop, vieweableMarginRight, vieweableMarginBottom, vieweableMarginLeft;
   renderer.getOrientedViewableTRBL(&vieweableMarginTop, &vieweableMarginRight, &vieweableMarginBottom,
                                    &vieweableMarginLeft);

src/components/themes/BaseTheme.h

@@ -114,5 +114,5 @@ class BaseTheme {
                               const std::function<std::string(int index)>& rowIcon) const;
   virtual Rect drawPopup(const GfxRenderer& renderer, const char* message) const;
   virtual void fillPopupProgress(const GfxRenderer& renderer, const Rect& layout, const int progress) const;
-  virtual void drawBookProgressBar(const GfxRenderer& renderer, const size_t bookProgress) const;
+  virtual void drawReadingProgressBar(const GfxRenderer& renderer, const size_t bookProgress) const;
 };