Add Lexicube, a word-dice party game with a post-game dictionary

Cargo.toml

@@ -47,6 +47,7 @@ members = [
     "examples/sidekick",
     "examples/store",
     "apps/arxiv",
+    "apps/lexicube",
     "apps/morse",
     "apps/sudoku",
     "tools/icon-import",

apps/catalog.json

@@ -7,7 +7,7 @@
       "display_name": "arXiv",
       "short_label": "arXiv",
       "summary": "Browse and search arXiv, keep preprints, and read their HTML versions on your Kobo.",
-      "version": "1.3.4",
+      "version": "1.3.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "note",
       "capabilities": ["network"]
@@ -18,7 +18,7 @@
       "display_name": "Audiobook Studio",
       "short_label": "Audiobooks",
       "summary": "Turn a topic into an original narrated audiobook and listen on your Kobo.",
-      "version": "1.0.4",
+      "version": "1.0.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "headphones",
       "capabilities": ["network", "audio", "bluetooth-audio", "bluetooth-control"]
@@ -29,7 +29,7 @@
       "display_name": "Daily Brief",
       "short_label": "Daily Brief",
       "summary": "Build a daily news brief in the background while you use other apps.",
-      "version": "1.0.4",
+      "version": "1.0.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "clock",
       "capabilities": ["network"]
@@ -40,7 +40,7 @@
       "display_name": "AI Command Center",
       "short_label": "AI Chat",
       "summary": "Ask a question, then read and navigate the answer with touch controls.",
-      "version": "1.0.4",
+      "version": "1.0.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "chat",
       "capabilities": ["network"]
@@ -51,7 +51,7 @@
       "display_name": "Components",
       "short_label": "Components",
       "summary": "See every Cobalt UI component on the device in one reference app.",
-      "version": "1.0.4",
+      "version": "1.0.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "chart",
       "capabilities": ["network"]
@@ -62,7 +62,7 @@
       "display_name": "Gutenbird",
       "short_label": "Gutenbird",
       "summary": "Browse OPDS libraries and read their books on your Kobo.",
-      "version": "1.0.4",
+      "version": "1.0.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "book",
       "capabilities": ["network", "frontlight-control"]
@@ -73,18 +73,29 @@
       "display_name": "Hacker News",
       "short_label": "Hacker News",
       "summary": "Read Top, New, Ask, and Show stories with complete comment threads.",
-      "version": "1.0.4",
+      "version": "1.0.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "news",
       "capabilities": ["network"]
     },
+    {
+      "package": "kobo-lexicube",
+      "id": "lexicube",
+      "display_name": "Lexicube",
+      "short_label": "Lexicube",
+      "summary": "Shake sixteen letter dice, find words for three minutes, then look them up.",
+      "version": "1.0.0",
+      "minimum_cobalt_version": "0.3.1",
+      "glyph": "grid",
+      "capabilities": []
+    },
     {
       "package": "kobo-magnet",
       "id": "magnet",
       "display_name": "Magnet",
       "short_label": "Magnet",
       "summary": "Find the hall sensor behind the bezel and watch it respond to a magnet.",
-      "version": "1.0.4",
+      "version": "1.0.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "magnet",
       "capabilities": ["cover-sensor"]
@@ -95,7 +106,7 @@
       "display_name": "Morse",
       "short_label": "Morse",
       "summary": "Type a message and send it in Morse code with the front light.",
-      "version": "1.0.6",
+      "version": "1.0.7",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "light",
       "capabilities": ["frontlight-control", "keep-awake"]
@@ -106,7 +117,7 @@
       "display_name": "Feeds",
       "short_label": "Feeds",
       "summary": "Follow website feeds and read their articles without the web page around them.",
-      "version": "1.0.4",
+      "version": "1.0.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "rss",
       "capabilities": ["network"]
@@ -117,7 +128,7 @@
       "display_name": "Sidekick",
       "short_label": "Sidekick",
       "summary": "Answer coding-agent permission prompts from your Kobo.",
-      "version": "1.0.4",
+      "version": "1.0.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "key",
       "capabilities": ["network"]
@@ -128,7 +139,7 @@
       "display_name": "Sudoku",
       "short_label": "Sudoku",
       "summary": "Play touch-first Sudoku designed for an e-ink screen.",
-      "version": "1.0.5",
+      "version": "1.0.6",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "grid",
       "capabilities": []
@@ -139,7 +150,7 @@
       "display_name": "Tic-tac-toe",
       "short_label": "Tic-tac-toe",
       "summary": "Play tic-tac-toe together on one Kobo.",
-      "version": "1.0.4",
+      "version": "1.0.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "grid",
       "capabilities": []
@@ -150,7 +161,7 @@
       "display_name": "Todo",
       "short_label": "Todo",
       "summary": "Keep a simple to-do list that stays on your Kobo.",
-      "version": "1.0.4",
+      "version": "1.0.5",
       "minimum_cobalt_version": "0.3.1",
       "glyph": "check",
       "capabilities": []

apps/lexicube/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "kobo-lexicube"
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+publish = false
+
+[dependencies]
+fontdue = "0.9"
+kobo-sdk = { path = "../../crates/kobo-sdk" }
+kobo-text = { path = "../../crates/kobo-text" }
+
+[dev-dependencies]
+kobo-ui = { path = "../../crates/kobo-ui" }
+
+[lints]
+workspace = true

apps/lexicube/README.md

@@ -0,0 +1,50 @@
+# Lexicube
+
+Sixteen letter dice, three minutes, and a dictionary for the argument
+afterwards.
+
+The board is the game: players read the same shaken board and write every word
+they can find on their own paper, exactly as they would around a physical
+tray. The app supplies the shake, the clock, and the part every table wants
+when the pens go down — settling whether a word is real.
+
+| Mid-game | Checking a word |
+| --- | --- |
+| ![Sixteen serif letter dice lying rotated on a 4x4 board under a countdown clock](screenshots/board.png) | ![A checked word marked valid, with two offline WordNet definitions above the keyboard](screenshots/lookup.png) |
+
+*Captured from a Kobo Libra Colour with `kobo shot --device`.*
+
+## Playing
+
+Shake with **New game**. The dice land rotated, as plastic dice do, drawn in a
+bold serif whose serifs keep a turned N from reading as a Z. A word uses
+letters that touch in a chain, sideways or diagonally, without using the same
+die twice; three letters or longer, and the Qu die counts as two letters.
+
+**Pause** covers the board with a letterless twin of the same size, so
+stopping the clock never hands anybody extra thinking time. **End the game
+early** sits under the clock for tables that run out of words before the
+clock does.
+
+## When the pens go down
+
+**Check a word** settles disputes: validity is answered offline from an
+embedded ENABLE list of 172,820 words, misspellings get near-miss
+suggestions, and definitions come from Cobalt's offline dictionary service
+when the owner has installed dictionaries. Scoring is a word's letter count
+minus two — one point for a three-letter word, and one more for every letter
+beyond it. A plural is its own word, found and scored beside its singular.
+
+## Licences
+
+The word list is ENABLE (Enhanced North American Benchmark LExicon), the
+public-domain word-game list compiled by Alan Beale and M. Cooper, as
+mirrored at [norvig.com/ngrams/enable1.txt](https://norvig.com/ngrams/enable1.txt).
+The dice letters are set in DejaVu Serif Bold, whose Bitstream Vera licence
+travels beside it in `fonts/LICENSE-DejaVu.txt`. The dice face distribution
+is the modern tabletop set's.
+
+---
+
+Built with the [Cobalt SDK](../../README.md). No capabilities: the panel and
+the embedded list are the whole game.