Implement orientation-aware icon rendering using freeink::Icon format that applies rotation transforms per-pixel. Add wasListScroll helper for touch-based list navigation with swipe gestures. Switch vertical centering from x-height to cap-height for better visual alignment with capital-led UI labels.
Introduces uiScale() method to apply per-board UI scaling based on device type (1.0 for button devices, >1 for touch devices to make UI elements finger-sized). Adds scaledMetrics member to store scaled theme metrics that are returned by getMetrics().
Simplify and clarify documentation for touch gesture detection (back gesture, item taps, long-press) and board detection flags. No functional changes, just improved comment readability.
Implements a press-and-hold gesture in the center touch zone (400ms threshold) that opens the reader menu, mirroring the Confirm button behavior. The center third of the screen is now reserved for this menu gesture, while left and right thirds continue to handle page turns. Applied to both EPUB and XTC readers.
Implements tap zones on touch devices for page back/forward navigation and press-and-hold actions, mirroring physical button behavior. Adds isXteinkDevice() helper to distinguish Xteink X3/X4 boards from touch devices. The sunlight fading fix setting is now exclusive to Xteink devices, while touch devices get the new touch reader controls toggle instead.
Separate the default constructor from the parameterized constructor to allow value-initialization of Rect arrays without routing through an explicit constructor. The parameterized constructor remains explicit to prevent implicit int-to-Rect conversions. Member variables now use in-class initializers.
Changed the fallback corner gesture detection to use logical (orientation-mapped) coordinates instead of native panel coordinates. This ensures the gesture area remains in the visual top-left corner across all screen orientations, particularly for screens without a header or Back button target like the reader.
Make the entire continue-reading card (cover, title, and gray area) clickable instead of just the cover photo. The clickable area now spans the full tile width rather than just the cover width plus padding.
Implement touch-down event detection to provide immediate visual feedback when touching list items, mirroring button navigation behavior. Add long-press detection (500ms threshold) to distinguish between tap and hold gestures. Apply touch-down selection updates to file browser, home menu, and recent books activities.
Implements tapToLogical() to convert normalized touch coordinates to orientation-aware logical screen coordinates. Adds TouchRegistry hit testing for interactive UI elements and header back button. Touch gestures now work correctly across all screen orientations (Portrait, Landscape, etc.) by inverting the rotateCoordinates transform.
Add dynamic I2C bus selection for battery gauge to support boards with multiple I2C controllers (e.g., Sticky uses Wire1 to avoid conflicts with GT911 touch). Fix logging on ESP32-S3 USB-Serial-JTAG by using esp_rom_printf instead of Serial, which incorrectly reports disconnected state.
Replace hardcoded X3-specific I2C pins and frequencies with values from the active board profile. Add support for boards with I2C fuel gauges (X3, LilyGo, Sticky) and ADC-based battery sensing (X4, M5Paper). Skip ADC setup when batteryAdc is unassigned to prevent GPIO mux faults.
Prevent I2C pin collision on S3/ESP32 boards by skipping the X3/X4 fingerprint probe. The probe's I2C pins (GPIO20/0) conflict with onboard peripherals like the BQ27220 gauge and reconfigure strapping pins. Force deviceType to X4 for non-C3 builds.
Change SPI pre-claim logic to only apply on C3/Xteink hardware where EPD_* pins are hardcoded. Other boards (M5Paper, Sticky) need to initialize SPI from BoardConfig::ACTIVE pins to avoid incorrect pin assignments for display and SD card.
## Summary
This PR adds the [Libre Baskerville
](https://github.com/impallari/Libre-Baskerville) font family to the
fonts available for download in CrossPoint.
## Additional Context
Baskerville is a classic font family, widely available in some form or
the other in most ereaders and widely used in publishing and in the
academy.
Libre Baskerville is a libre (SIL Open Font License v1) implementation
of it, which makes it possible for CrossPoint to ship it without issues.
---
### AI Usage
Did you use AI tools to help write this code? _**NO**_
## Summary
Non-functional cleanup: `ChapterHtmlSlimParser::` prefix is redundant
when calling `applyDirectionToEntry` within `ChapterHtmlSlimParser`
methods.
---
### AI Usage
Did you use AI tools to help write this code? _**NO**_
## Summary
* **What is the goal of this PR?** Prevent heap memory exhaustion caused
by thousands of machine-generated anchor IDs injected by epub converters
like Kobo KePub.
* Fix#2292.
* **What changes are included?**
* **Element-type filter (Layer 1):** Introduced the
`isNonNavigableInlineElement()` function in `ChapterHtmlSlimParser.cpp`
to automatically skip recording IDs on `<span>` elements, as they are
purely inline wrappers used for tracking and lack navigable meaning.
* **Hard cap (Layer 2):** Added the `MAX_ANCHORS_PER_CHAPTER = 1024`
constant to act as a fallback safety net against unbounded heap growth
from unknown future ID-injection patterns on non-span elements.
* **TOC Safety net:** Ensured that IDs matching known Table of Contents
(TOC) entries explicitly bypass both the `<span>` filter and the
1024-anchor cap, guaranteeing that chapter page-break and core
navigation logic are never compromised.
---
### AI Usage
While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.
Did you use AI tools to help write this code? _**< PARTIALLY >**_
Add cppcheck-suppress comments for knownConditionTrueFalse warnings related to CROSSPOINT_SHOW_BUTTON_HINTS, which is a build-time configuration switch that may appear as a constant condition during static analysis.
Implements a reusable touch tap gesture in the top-left corner that maps to the Back button. The gesture is automatically integrated into wasPressed/wasReleased for Back button, making it available across all screens without per-activity code. Also fixes low-power CPU frequency floor to 80 MHz on PSRAM boards to prevent SD write and PSRAM instability caused by APB clock dropping below safe threshold.
## Summary
* **What is the goal of this PR?** Update project documentation to match
the current master implementation for cache formats, i18n, file
transfer/web server workflows, SD-card fonts, and root user-facing docs.
* **What changes are included?** Refreshes `book.bin`/`section.bin` docs
for v6/v25, updates File Transfer/Calibre/WebDAV/API docs, documents 24
UI languages and JSON language persistence, updates root
README/USER_GUIDE cache and network details, and syncs the tracked
CLAUDE skill doc cache-version notes.
## Additional Context
* Docs-only change. Verified with `git diff --check origin/master..HEAD`
and stale-reference greps for old cache versions, removed i18n APIs, old
WiFi screen wording, and raw `Serial.printf` examples. No firmware build
was run.
---
### AI Usage
While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.
Did you use AI tools to help write this code? _**NO**_
## Summary
`std::map` heap-allocates each node. Avoid using it for wifi SSID
dedupe, and instead just dedupe in-place with the existing `networks`
vector. Removed dead `ipAddress` member in `WifiNetworkInfo` struct.
---
### AI Usage
Did you use AI tools to help write this code? _**PARTIALLY**_
## Summary
* **What is the goal of this PR?**
* Fix EPUBs where internal file references are written in URL-style
escaped form, like spaces appearing as `%20`, so the reader can find the
right files instead of treating those references as missing.
* **What changes are included?**
* Added a small shared helper that converts those escaped EPUB-internal
paths back into their normal filenames before we try to look them up.
* Applied that cleanup step across the EPUB parsing flow wherever we
resolve internal references, including cover images, manifest items, TOC
links, spine entries, and inline HTML images.
* Kept the change narrowly focused on EPUB-internal asset resolution
rather than changing broader URL or networking behavior.
## Additional Context
* The user-facing bug here is that some books package their internal
filenames in an escaped form, so a file like `Chapter 1.xhtml` may be
referenced more like `Chapter%201.xhtml`. The reader was treating that
escaped text as the literal filename, which means otherwise-valid books
could lose images, covers, or chapter targets because the lookup no
longer matched the real file inside the EPUB.
* Risk is intentionally low. The helper only rewrites valid `%XX` escape
sequences and leaves malformed input alone, so it should improve
compatibility with escaped filenames without broadening the parser’s
behavior in unrelated cases.
## Local Testing Performed
* This was tested on my device with the user-provided optimized epub
that was not rendering images within the text prior to this fix (cover
image and chapter headers were rendering fine):
[orv_main_baseline.epub.zip](https://github.com/user-attachments/files/28529545/orv_main_baseline.epub.zip)
* This was also tested by the user with a local build and the affected
epub and confirmed to be working
## Steps for Testing
* Try to open the affected epub (linked above) or any epub that has
similar percent-encoding on a build prior to this fix.
* Apply this fix, clear book cache, and re-open the affected book.
* Images should render properly.
---
### AI Usage
While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.
Did you use AI tools to help write this code? _**< YES >**_
## Summary
Use `std::string_view` and case-insensitive comparisons to avoid string
allocations during CSS parsing.
**Hot path:** `resolveStyle` (called per HTML start tag during chapter
rendering) now does zero heap allocations. Previously it allocated a
normalized tag string, a vector of class strings, and a composite key
per class. For a chapter with ~2000 tags × 2 classes each, that's ~12
000 small short-lived allocations eliminated per page render — primarily
a heap-fragmentation win on the ESP32-C3's ~380KB RAM.
**Cold path:** CSS load no longer allocates per-rule selector vectors or
per-token strings; `splitOnChar`/`splitWhitespace` are gone, replaced
with callback-based tokenization (`forEachDelimitedToken`).
**Behavioral notes:**
- The selector `unordered_map` now uses an ASCII-case-insensitive
hash/equal. Selectors are stored with their original case rather than
pre-lowercased; the observable lookup result is unchanged.
- `stripTrailingImportant` is now case-insensitive (per CSS spec;
previously matched only lowercase `!important`).
**Cache compatibility:** `CSS_CACHE_VERSION` unchanged. Old caches
(lowercase selectors) load correctly under the new lookup; new caches
will contain verbatim-case selectors — both forms work.
---
### AI Usage
Did you use AI tools to help write this code? _**PARTIALLY**_
Justin Mitchell
