Hi

\",\n});\n```\n\n## Val Town Utility Functions\n\nVal Town provides several utility functions to help with common project tasks.\n\n### Importing Utilities\n\nAlways import utilities with version pins to avoid breaking changes:\n\n```ts\nimport {\n parseProject,\n readFile,\n serveFile,\n} from \"https://esm.town/v/std/utils@85-main/index.ts\";\n```\n\n### Available Utilities\n\n#### **serveFile** - Serve project files with proper content types\n\nFor example, in Hono:\n\n```ts\n// serve all files in frontend/ and shared/\napp.get(\"/frontend/*\", (c) => serveFile(c.req.path, import.meta.url));\napp.get(\"/shared/*\", (c) => serveFile(c.req.path, import.meta.url));\n```\n\n#### **readFile** - Read files from within the project:\n\n```ts\n// Read a file from the project\nconst fileContent = await readFile(\"/frontend/index.html\", import.meta.url);\n```\n\n#### **listFiles** - List all files in the project\n\n```ts\nconst files = await listFiles(import.meta.url);\n```\n\n#### **parseProject** - Extract information about the current project from import.meta.url\n\nThis is useful for including info for linking back to a val, ie in \"view source\"\nurls:\n\n```ts\nconst projectVal = parseProject(import.meta.url);\nconsole.log(projectVal.username); // Owner of the project\nconsole.log(projectVal.name); // Project name\nconsole.log(projectVal.version); // Version number\nconsole.log(projectVal.branch); // Branch name\nconsole.log(projectVal.links.self.project); // URL to the project page\n```\n\nHowever, it's _extremely importing_ to note that `parseProject` and other\nStandard Library utilities ONLY RUN ON THE SERVER. If you need access to this\ndata on the client, run it in the server and pass it to the client by splicing\nit into the HTML page or by making an API request for it.\n\n## Val Town Platform Specifics\n\n- **Redirects:** Use\n `return new Response(null, { status: 302, headers: { Location: \"/place/to/redirect\" }})`\n instead of `Response.redirect` which is broken\n- **Images:** Avoid external images or base64 images. Use emojis, unicode\n symbols, or icon fonts/libraries instead\n- **AI Image:** To inline generate an AI image use:\n `

`\n- **Storage:** DO NOT use the Deno KV module for storage\n- **Browser APIs:** DO NOT use the `alert()`, `prompt()`, or `confirm()` methods\n- **Weather Data:** Use open-meteo for weather data (doesn't require API keys)\n unless otherwise specified\n- **View Source:** Add a view source link by importing & using\n `import.meta.url.replace(\"esm.sh\", \"val.town)\"` (or passing this data to the\n client) and include `target=\"_top\"` attribute\n- **Error Debugging:** Add\n `` to HTML to capture\n client-side errors\n- **Error Handling:** Only use try...catch when there's a clear local\n resolution; Avoid catches that merely log or return 500s. Let errors bubble up\n with full context\n- **Environment Variables:** Use `Deno.env.get('keyname')` when you need to, but\n generally prefer APIs that don't require keys\n- **Imports:** Use `https://esm.sh` for npm and Deno dependencies to ensure\n compatibility on server and browser\n- **Storage Strategy:** Only use backend storage if explicitly required; prefer\n simple static client-side sites\n- **React Configuration:** When using React libraries, pin versions with\n `?deps=react@18.2.0,react-dom@18.2.0` and start the file with\n `/** @jsxImportSource https://esm.sh/react@18.2.0 */`\n- Ensure all React dependencies and sub-dependencies are pinned to the same\n version\n- **Styling:** Default to using TailwindCSS via\n `` unless otherwise\n specified\n\n## Project Structure and Design Patterns\n\n### Recommended Directory Structure\n\n```\n├── backend/\n│ ├── database/\n│ │ ├── migrations.ts # Schema definitions\n│ │ ├── queries.ts # DB query functions\n│ │ └── README.md\n│ └── routes/ # Route modules\n│ ├── [route].ts\n│ └── static.ts # Static file serving\n│ ├── index.ts # Main entry point\n│ └── README.md\n├── frontend/\n│ ├── components/\n│ │ ├── App.tsx\n│ │ └── [Component].tsx\n│ ├── favicon.svg\n│ ├── index.html # Main HTML template\n│ ├── index.tsx # Frontend JS entry point\n│ ├── README.md\n│ └── style.css\n├── README.md\n└── shared/\n ├── README.md\n └── utils.ts # Shared types and functions\n```\n\n### Backend (Hono) Best Practices\n\n- Hono is the recommended API framework\n- Main entry point should be `backend/index.ts`\n- **Static asset serving:** Use the utility functions to read and serve project\n files:\n ```ts\n import {\n readFile,\n serveFile,\n } from \"https://esm.town/v/std/utils@85-main/index.ts\";\n\n // serve all files in frontend/ and shared/\n app.get(\"/frontend/*\", (c) => serveFile(c.req.path, import.meta.url));\n app.get(\"/shared/*\", (c) => serveFile(c.req.path, import.meta.url));\n\n // For index.html, often you'll want to bootstrap with initial data\n app.get(\"/\", async (c) => {\n let html = await readFile(\"/frontend/index.html\", import.meta.url);\n\n // Inject data to avoid extra round-trips\n const initialData = await fetchInitialData();\n const dataScript = ``;\n\n html = html.replace(\"\", `${dataScript}`);\n return c.html(html);\n });\n ```\n- Create RESTful API routes for CRUD operations\n- Always include this snippet at the top-level Hono app to re-throwing errors to\n see full stack traces:\n ```ts\n // Unwrap Hono errors to see original error details\n app.onError((err, c) => {\n throw err;\n });\n ```\n\n### Database Patterns\n\n- Run migrations on startup or comment out for performance\n- Change table names when modifying schemas rather than altering\n- Export clear query functions with proper TypeScript typing\n\n## Common Gotchas and Solutions\n\n1. **Environment Limitations:**\n - Val Town runs on Deno in a serverless context, not Node.js\n - Code in `shared/` must work in both frontend and backend environments\n - Cannot use `Deno` keyword in shared code\n - Use `https://esm.sh` for imports that work in both environments\n\n2. **SQLite Peculiarities:**\n - Limited support for ALTER TABLE operations\n - Create new tables with updated schemas and copy data when needed\n - Always run table creation before querying\n\n3. **React Configuration:**\n - All React dependencies must be pinned to 18.2.0\n - Always include `@jsxImportSource https://esm.sh/react@18.2.0` at the top of\n React files\n - Rendering issues often come from mismatched React versions\n\n4. **File Handling:**\n - Val Town only supports text files, not binary\n - Use the provided utilities to read files across branches and forks\n - For files in the project, use `readFile` helpers\n\n5. **API Design:**\n - `fetch` handler is the entry point for HTTP vals\n - Run the Hono app with\n `export default app.fetch // This is the entry point for HTTP vals`",[],[88],["D",1788266856919],[],[19],"092abfc9-fa48-4219-832a-6de2fa02327d","frontend","4f1489b2-a603-11f1-b656-1607ee4eb77e",["D",1788266856689],"directory",[105,106,107,108,109,110,111],[99],{"_33":161,"_13":162,"_35":163,"_37":100,"_38":39,"_40":164,"_42":43,"_44":165,"_17":46,"_47":125,"_48":166,"_50":51,"_52":-5,"_68":167,"_18":168},{"_33":153,"_13":154,"_35":155,"_37":100,"_38":39,"_40":156,"_42":43,"_44":157,"_17":46,"_47":24,"_48":158,"_50":51,"_52":-5,"_68":159,"_18":160},{"_33":145,"_13":146,"_35":147,"_37":100,"_38":39,"_40":148,"_42":43,"_44":149,"_17":46,"_47":125,"_48":150,"_50":51,"_52":-5,"_68":151,"_18":152},{"_33":137,"_13":138,"_35":139,"_37":100,"_38":39,"_40":140,"_42":43,"_44":141,"_17":46,"_47":24,"_48":142,"_50":51,"_52":-5,"_68":143,"_18":144},{"_33":129,"_13":130,"_35":131,"_37":100,"_38":39,"_40":132,"_42":43,"_44":133,"_17":46,"_47":125,"_48":134,"_50":51,"_52":-5,"_68":135,"_18":136},{"_33":120,"_13":121,"_35":122,"_37":100,"_38":39,"_40":123,"_42":43,"_44":124,"_17":46,"_47":125,"_48":126,"_50":51,"_52":-5,"_68":127,"_18":128},{"_33":112,"_13":113,"_35":114,"_37":100,"_38":39,"_40":115,"_42":43,"_44":116,"_17":46,"_47":24,"_48":117,"_50":51,"_52":-5,"_68":118,"_18":119},"d0d018bf-73ee-4281-8ca9-f54646f28e72","style.css","4f5a0348-a603-11f1-8a7e-1607ee4eb77e",9,["D",1788266857112],"/* ==========================================================================\n Gingham Mill\n Indigo (the dye), a sage cutting mat (the table), brass (the machine).\n The accent is not fixed: it is pulled live from the primary yarn, so the\n whole instrument tints to whatever cloth you are weaving.\n ========================================================================== */\n\n:root {\n --vat-0: #0d1620;\n --vat-1: #13202b;\n --vat-2: #1a2937;\n --vat-3: #253849;\n --vat-4: #32485c;\n\n --lint: #ece7da;\n --chalk: #93a6b8;\n --chalk-dim: #63788c;\n\n --brass: #d8a13a;\n --accent: #d8a13a;\n --accent-ink: #12100a;\n\n --mat: #2c463e;\n --mat-line: rgba(233, 240, 226, 0.075);\n\n --display: \"Archivo\", \"Helvetica Neue\", Arial, sans-serif;\n --body: \"IBM Plex Sans\", ui-sans-serif, system-ui, sans-serif;\n --mono: \"IBM Plex Mono\", ui-monospace, \"SFMono-Regular\", Menlo, monospace;\n\n --rail-h: 58px;\n --ruler: 30px;\n --r: 3px;\n}\n\n* { box-sizing: border-box; }\n\n/* Class rules that set `display` outrank the browser's own [hidden] rule, so\n state it explicitly once rather than per component. */\n[hidden] { display: none !important; }\n\nhtml, body { height: 100%; }\n\nbody {\n margin: 0;\n background: var(--vat-1);\n color: var(--lint);\n font-family: var(--body);\n font-size: 14px;\n line-height: 1.45;\n -webkit-font-smoothing: antialiased;\n overflow: hidden;\n}\n\nbutton, input, select { font: inherit; color: inherit; }\n\n:focus-visible {\n outline: 2px solid var(--accent);\n outline-offset: 2px;\n border-radius: 1px;\n}\n\n/* ------------------------------------------------------------------- rail */\n\n.rail {\n height: var(--rail-h);\n display: flex;\n align-items: center;\n gap: 24px;\n padding: 0 18px;\n background: var(--vat-0);\n border-bottom: 1px solid var(--vat-3);\n}\n\n.mark { display: flex; align-items: center; gap: 10px; flex: none; }\n.mark-glyph { width: 20px; height: 20px; color: var(--accent); transition: color .35s ease; }\n\n.mark h1 {\n margin: 0;\n font-family: var(--display);\n font-variation-settings: \"wdth\" 118, \"wght\" 700;\n font-size: 15px;\n letter-spacing: .13em;\n text-transform: uppercase;\n white-space: nowrap;\n}\n\n.spec {\n margin: 0;\n display: flex;\n gap: 22px;\n flex: 1;\n min-width: 0;\n overflow: hidden;\n font-family: var(--mono);\n font-size: 11.5px;\n}\n.spec-item { display: flex; gap: 7px; white-space: nowrap; }\n.spec em {\n font-style: normal;\n color: var(--chalk-dim);\n text-transform: uppercase;\n letter-spacing: .1em;\n font-size: 10px;\n align-self: center;\n}\n.spec b { font-weight: 500; color: var(--chalk); }\n\n.rail-actions { display: flex; align-items: center; gap: 12px; flex: none; }\n\n/* ------------------------------------------------------------- primitives */\n\n.seg {\n display: inline-flex;\n background: var(--vat-2);\n border: 1px solid var(--vat-3);\n border-radius: var(--r);\n padding: 2px;\n gap: 2px;\n}\n.seg-wide { display: flex; width: 100%; }\n.seg-wide .seg-btn { flex: 1; }\n\n.seg-btn {\n appearance: none;\n border: 0;\n background: transparent;\n color: var(--chalk);\n font-family: var(--mono);\n font-size: 11px;\n letter-spacing: .04em;\n padding: 4px 10px;\n border-radius: 2px;\n cursor: pointer;\n transition: background .15s, color .15s;\n}\n.seg-btn:hover { color: var(--lint); background: var(--vat-3); }\n.seg-btn.is-on { background: var(--vat-4); color: var(--lint); }\n\n.btn {\n appearance: none;\n border: 1px solid var(--vat-4);\n background: var(--vat-2);\n color: var(--lint);\n padding: 6px 14px;\n border-radius: var(--r);\n cursor: pointer;\n font-size: 13px;\n white-space: nowrap;\n transition: background .15s, border-color .15s, transform .1s;\n}\n.btn:hover { background: var(--vat-3); }\n.btn:active { transform: translateY(1px); }\n\n.btn-accent {\n background: var(--accent);\n border-color: var(--accent);\n color: var(--accent-ink);\n font-weight: 600;\n transition: background .35s ease, color .35s ease, transform .1s;\n}\n.btn-accent:hover { filter: brightness(1.08); background: var(--accent); }\n\n.ghost-btn {\n appearance: none;\n border: 1px solid var(--vat-3);\n background: transparent;\n color: var(--chalk-dim);\n font-family: var(--mono);\n font-size: 10px;\n letter-spacing: .06em;\n padding: 3px 7px;\n border-radius: 2px;\n cursor: pointer;\n}\n.ghost-btn:hover { color: var(--lint); border-color: var(--vat-4); }\n\n.tiny {\n appearance: none;\n border: 1px solid var(--vat-3);\n background: var(--vat-2);\n color: var(--chalk);\n font-family: var(--mono);\n font-size: 10.5px;\n padding: 4px 8px;\n border-radius: 2px;\n cursor: pointer;\n}\n.tiny:hover { color: var(--lint); border-color: var(--accent); }\n\n/* -------------------------------------------------------------- structure */\n\n.mill {\n display: grid;\n grid-template-columns: 384px minmax(0, 1fr);\n height: calc(100% - var(--rail-h));\n}\n\n.controls {\n overflow-y: auto;\n overscroll-behavior: contain;\n background: var(--vat-1);\n border-right: 1px solid var(--vat-3);\n padding-bottom: 40px;\n}\n\n.right {\n display: flex;\n flex-direction: column;\n overflow-y: auto;\n background: var(--vat-0);\n}\n\n.panel {\n padding: 18px 18px 22px;\n border-bottom: 1px solid var(--vat-3);\n}\n\n.panel-head {\n margin: 0 0 14px;\n font-family: var(--display);\n font-variation-settings: \"wdth\" 100, \"wght\" 650;\n font-size: 17px;\n letter-spacing: -.005em;\n display: flex;\n flex-direction: column;\n gap: 3px;\n}\n\n.eyebrow {\n font-family: var(--mono);\n font-size: 9.5px;\n font-weight: 500;\n letter-spacing: .22em;\n text-transform: uppercase;\n color: var(--accent);\n opacity: .85;\n transition: color .35s ease;\n}\n\n.sub-head {\n margin: 20px 0 9px;\n font-family: var(--mono);\n font-size: 10px;\n letter-spacing: .18em;\n text-transform: uppercase;\n color: var(--chalk-dim);\n font-weight: 500;\n}\n\n.hint {\n margin: 8px 0 0;\n font-size: 11.5px;\n line-height: 1.5;\n color: var(--chalk-dim);\n}\n\n.blurb {\n margin: 9px 0 0;\n font-size: 12px;\n color: var(--chalk);\n}\n\n.warn {\n margin: 10px 0 0;\n font-size: 11.5px;\n color: var(--brass);\n border-left: 2px solid var(--brass);\n padding-left: 9px;\n}\n\n/* ------------------------------------------------------------ style picker */\n\n.style-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }\n\n.style-btn {\n appearance: none;\n text-align: left;\n border: 1px solid var(--vat-3);\n background: var(--vat-2);\n color: var(--chalk);\n padding: 8px 10px;\n border-radius: var(--r);\n cursor: pointer;\n font-size: 12.5px;\n transition: border-color .15s, color .15s, background .15s;\n}\n.style-btn:hover { color: var(--lint); background: var(--vat-3); }\n.style-btn.is-on {\n border-color: var(--accent);\n color: var(--lint);\n background: color-mix(in srgb, var(--accent) 14%, var(--vat-2));\n}\n\n/* --------------------------------------------------------------- presets */\n\n.chips {\n display: grid;\n grid-template-columns: repeat(4, 1fr);\n gap: 7px;\n}\n\n.chip {\n appearance: none;\n border: 1px solid var(--vat-3);\n background: var(--vat-2);\n padding: 0;\n border-radius: var(--r);\n cursor: pointer;\n overflow: hidden;\n display: flex;\n flex-direction: column;\n transition: border-color .15s, transform .12s;\n}\n.chip:hover { border-color: var(--accent); transform: translateY(-1px); }\n.chip canvas { width: 100%; aspect-ratio: 1; display: block; }\n.chip b {\n font-family: var(--mono);\n font-size: 9px;\n font-weight: 500;\n letter-spacing: .04em;\n color: var(--chalk);\n padding: 4px 2px;\n text-align: center;\n border-top: 1px solid var(--vat-3);\n white-space: nowrap;\n overflow: hidden;\n text-overflow: ellipsis;\n}\n.chip:hover b { color: var(--lint); }\n\n/* ----------------------------------------------------------------- yarns */\n\n.yarn { margin-bottom: 14px; }\n.yarn[hidden] { display: none; }\n\n.yarn-top { display: flex; align-items: center; gap: 8px; }\n.yarn-name { flex: none; width: 74px; font-size: 12.5px; color: var(--chalk); }\n\n.swatch-chip {\n position: relative;\n width: 30px;\n height: 24px;\n flex: none;\n border-radius: 2px;\n overflow: hidden;\n border: 1px solid var(--vat-4);\n background-image:\n linear-gradient(45deg, #4a4a4a 25%, transparent 25%),\n linear-gradient(-45deg, #4a4a4a 25%, transparent 25%),\n linear-gradient(45deg, transparent 75%, #4a4a4a 75%),\n linear-gradient(-45deg, transparent 75%, #4a4a4a 75%);\n background-size: 8px 8px;\n background-position: 0 0, 0 4px, 4px -4px, -4px 0;\n background-color: #6d6d6d;\n}\n.swatch-chip.small { width: 26px; height: 22px; }\n.swatch-chip input[type=color] {\n position: absolute;\n inset: -4px;\n width: calc(100% + 8px);\n height: calc(100% + 8px);\n padding: 0;\n border: 0;\n background: transparent;\n cursor: pointer;\n}\n\n.hex {\n flex: 1;\n min-width: 0;\n background: var(--vat-2);\n border: 1px solid var(--vat-3);\n border-radius: 2px;\n padding: 4px 7px;\n font-family: var(--mono);\n font-size: 12px;\n letter-spacing: .02em;\n}\n.hex:focus { border-color: var(--accent); }\n\n/* --------------------------------------------------------------- sliders */\n\n.row-slider {\n display: grid;\n grid-template-columns: 108px 1fr 54px;\n align-items: center;\n gap: 10px;\n margin: 9px 0;\n}\n.row-slider label { font-size: 12.5px; color: var(--chalk); }\n.row-slider[hidden] { display: none; }\n.balance { margin-top: 16px; }\n\n.num {\n font-family: var(--mono);\n font-size: 11px;\n color: var(--lint);\n text-align: right;\n}\n\ninput[type=range] {\n appearance: none;\n width: 100%;\n height: 18px;\n background: transparent;\n cursor: pointer;\n}\ninput[type=range]::-webkit-slider-runnable-track {\n height: 2px;\n background: var(--vat-4);\n border-radius: 0;\n}\ninput[type=range]::-webkit-slider-thumb {\n appearance: none;\n width: 9px;\n height: 16px;\n margin-top: -7px;\n background: var(--accent);\n border-radius: 1px;\n transition: background .35s ease;\n}\ninput[type=range]::-moz-range-track { height: 2px; background: var(--vat-4); }\ninput[type=range]::-moz-range-thumb {\n width: 9px;\n height: 16px;\n border: 0;\n border-radius: 1px;\n background: var(--accent);\n}\n\n/* ------------------------------------------------------------ dimensions */\n\n.dim-row {\n display: grid;\n grid-template-columns: 108px 1fr;\n align-items: center;\n gap: 10px;\n margin: 9px 0;\n}\n.dim-row[hidden] { display: none; }\n.dim-row > label { font-size: 12.5px; color: var(--chalk); }\n.dim-inputs { display: flex; align-items: center; gap: 8px; }\n\n.field {\n position: relative;\n display: inline-flex;\n align-items: center;\n flex: 1;\n min-width: 0;\n background: var(--vat-2);\n border: 1px solid var(--vat-3);\n border-radius: 2px;\n}\n.field:focus-within { border-color: var(--accent); }\n.field input {\n width: 100%;\n min-width: 0;\n background: transparent;\n border: 0;\n padding: 5px 30px 5px 8px;\n font-family: var(--mono);\n font-size: 12px;\n outline: none;\n -moz-appearance: textfield;\n}\n.field input::-webkit-outer-spin-button,\n.field input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }\n.field i {\n position: absolute;\n right: 7px;\n font-style: normal;\n font-family: var(--mono);\n font-size: 10px;\n color: var(--chalk-dim);\n pointer-events: none;\n}\n\n.derived {\n flex: 1;\n font-family: var(--mono);\n font-size: 11.5px;\n color: var(--chalk-dim);\n}\n\n.link-btn {\n appearance: none;\n display: flex;\n align-items: center;\n gap: 7px;\n background: transparent;\n border: 0;\n color: var(--chalk-dim);\n font-family: var(--mono);\n font-size: 10.5px;\n letter-spacing: .06em;\n cursor: pointer;\n padding: 2px 0 4px 118px;\n}\n.link-glyph {\n width: 14px;\n height: 8px;\n border: 1px solid currentColor;\n border-radius: 4px;\n}\n.link-btn.is-on { color: var(--accent); }\n.link-btn.is-on .link-glyph { background: currentColor; }\n\n.quick-row { display: flex; flex-wrap: wrap; gap: 5px; margin: 10px 0 0 118px; }\n#sizeQuick { margin-left: 0; }\n\n/* ----------------------------------------------------------------- stage */\n\n.stage {\n flex: 1;\n min-height: 60vh;\n display: flex;\n flex-direction: column;\n padding: 18px;\n gap: 12px;\n}\n\n.mat {\n flex: 1;\n min-height: 380px;\n display: grid;\n grid-template-columns: var(--ruler) minmax(0, 1fr);\n grid-template-rows: var(--ruler) minmax(0, 1fr);\n background-color: var(--mat);\n background-image:\n linear-gradient(var(--mat-line) 1px, transparent 1px),\n linear-gradient(90deg, var(--mat-line) 1px, transparent 1px);\n background-size: var(--mat-grid, 24px 24px);\n background-position: var(--ruler) var(--ruler);\n border: 1px solid var(--vat-3);\n border-radius: var(--r);\n overflow: hidden;\n}\n\n.mat-corner {\n background: var(--vat-0);\n border-right: 1px solid var(--vat-3);\n border-bottom: 1px solid var(--vat-3);\n display: grid;\n place-items: center;\n font-family: var(--mono);\n font-size: 9px;\n letter-spacing: .08em;\n color: var(--accent);\n text-transform: uppercase;\n}\n\n.ruler { background: var(--vat-0); display: block; }\n.ruler-top { border-bottom: 1px solid var(--vat-3); width: 100%; height: var(--ruler); }\n.ruler-left { border-right: 1px solid var(--vat-3); width: var(--ruler); height: 100%; }\n\n.swatch-scroll { overflow: auto; position: relative; }\n\n.swatch {\n position: relative;\n box-shadow: 0 10px 30px rgba(0, 0, 0, .45);\n animation: settle .5s cubic-bezier(.2, .8, .3, 1);\n}\n.swatch canvas { display: block; position: absolute; left: 0; top: 0; }\n\n.swatch[data-backdrop=\"checker\"] {\n background-image:\n linear-gradient(45deg, #8f8f8f 25%, transparent 25%),\n linear-gradient(-45deg, #8f8f8f 25%, transparent 25%),\n linear-gradient(45deg, transparent 75%, #8f8f8f 75%),\n linear-gradient(-45deg, transparent 75%, #8f8f8f 75%);\n background-size: 16px 16px;\n background-position: 0 0, 0 8px, 8px -8px, -8px 0;\n background-color: #bcbcbc;\n}\n.swatch[data-backdrop=\"white\"] { background: #fff; }\n.swatch[data-backdrop=\"black\"] { background: #000; }\n.swatch[data-backdrop=\"mat\"] { background: transparent; }\n\n@keyframes settle {\n from { opacity: 0; transform: translateY(4px); }\n to { opacity: 1; transform: none; }\n}\n\n.stage-foot {\n display: flex;\n align-items: center;\n justify-content: space-between;\n gap: 16px;\n flex-wrap: wrap;\n}\n\n.caliper {\n display: flex;\n align-items: center;\n gap: 9px;\n font-family: var(--mono);\n font-size: 11px;\n color: var(--chalk);\n}\n.caliper-mark { width: 46px; height: 11px; color: var(--accent); flex: none; }\n\n.stage-tools { display: flex; gap: 10px; flex-wrap: wrap; }\n\n/* ---------------------------------------------------------------- export */\n\n.export { border-bottom: 0; border-top: 1px solid var(--vat-3); }\n\n.export-grid {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));\n gap: 8px;\n}\n\n.fmt {\n appearance: none;\n text-align: left;\n border: 1px solid var(--vat-3);\n background: var(--vat-2);\n padding: 10px 12px;\n border-radius: var(--r);\n cursor: pointer;\n display: flex;\n flex-direction: column;\n gap: 2px;\n transition: border-color .15s, background .15s, transform .1s;\n}\n.fmt:hover { border-color: var(--accent); background: var(--vat-3); }\n.fmt:active { transform: translateY(1px); }\n.fmt b {\n font-family: var(--display);\n font-variation-settings: \"wdth\" 112, \"wght\" 700;\n font-size: 13px;\n letter-spacing: .07em;\n text-transform: uppercase;\n}\n.fmt span { font-size: 11px; color: var(--chalk-dim); }\n.fmt.alt b {\n font-variation-settings: \"wdth\" 100, \"wght\" 600;\n letter-spacing: .01em;\n text-transform: none;\n font-size: 12.5px;\n}\n\n.export-opts {\n display: flex;\n align-items: center;\n gap: 22px;\n margin-top: 14px;\n flex-wrap: wrap;\n}\n.opt { display: flex; align-items: center; gap: 9px; }\n.opt label { font-size: 12px; color: var(--chalk); }\n.opt input[type=range] { width: 130px; }\n\n.footnote {\n margin: 18px 0 0;\n font-size: 11.5px;\n color: var(--chalk-dim);\n max-width: 62ch;\n border-top: 1px solid var(--vat-2);\n padding-top: 12px;\n}\n\n/* ----------------------------------------------------------------- toast */\n\n.toast {\n position: fixed;\n left: 50%;\n bottom: 26px;\n transform: translate(-50%, 14px);\n background: var(--vat-4);\n border: 1px solid var(--accent);\n color: var(--lint);\n padding: 9px 18px;\n border-radius: var(--r);\n font-family: var(--mono);\n font-size: 12px;\n opacity: 0;\n pointer-events: none;\n transition: opacity .2s, transform .2s;\n z-index: 20;\n box-shadow: 0 8px 26px rgba(0, 0, 0, .5);\n}\n.toast.is-up { opacity: 1; transform: translate(-50%, 0); }\n\n/* -------------------------------------------------------------- responsive */\n\n@media (max-width: 940px) {\n body { overflow: auto; }\n .rail { flex-wrap: wrap; height: auto; padding: 12px 14px; gap: 12px; }\n .spec { order: 3; width: 100%; flex-basis: 100%; flex-wrap: wrap; gap: 6px 18px; overflow: visible; }\n .mill { grid-template-columns: 1fr; height: auto; }\n\n /* Read top to bottom: see the cloth, change the cloth, then cut it. */\n .right { display: contents; }\n .stage { order: 1; min-height: 0; padding: 14px; background: var(--vat-0); }\n .controls { order: 2; overflow: visible; border-right: 0; border-top: 1px solid var(--vat-3); }\n .export { order: 3; background: var(--vat-0); }\n .mat { height: 56vh; min-height: 280px; }\n .row-slider { grid-template-columns: 92px 1fr 46px; }\n .dim-row { grid-template-columns: 92px 1fr; }\n .link-btn, .quick-row { padding-left: 0; margin-left: 0; }\n .chips { grid-template-columns: repeat(3, 1fr); }\n}\n\n@media (prefers-reduced-motion: reduce) {\n * { animation-duration: .01ms !important; transition-duration: .01ms !important; }\n}\n",[],[99,113],"31e93371-5841-4b1d-bb50-41df9f0741e7","render.js","4f3f2168-a603-11f1-94e9-1607ee4eb77e",6,["D",1788266856889],"script","/**\n * render.js — putting the cloth on a surface.\n *\n * Every surface (live preview, PNG, SVG, a preset chip) consumes the same tile\n * from gingham.js and applies the same transform, so what you see is what you\n * export.\n */\n\nimport { buildTile, mulberry32 } from \"./gingham.js\";\n\n/** Draw one repeat into its own canvas, ready to be used as a fill pattern. */\nexport function tileCanvas(tile) {\n const c = document.createElement(\"canvas\");\n c.width = tile.w;\n c.height = tile.h;\n const ctx = c.getContext(\"2d\");\n for (const r of tile.rects) {\n ctx.fillStyle = r.css;\n ctx.fillRect(r.x, r.y, r.w, r.h);\n }\n return c;\n}\n\n/**\n * Pattern placement. Rotation pivots on the middle of the cloth so turning the\n * grain does not slide the pattern off one corner.\n */\nfunction matrix(cfg, W, H, scale) {\n const cx = W / 2, cy = H / 2;\n return new DOMMatrix()\n .scaleSelf(scale, scale)\n .translateSelf(cx, cy)\n .rotateSelf(cfg.angle)\n .translateSelf(-cx + cfg.offsetX, -cy + cfg.offsetY);\n}\n\nfunction svgTransform(cfg, W, H) {\n const cx = W / 2, cy = H / 2;\n const n = (v) => Math.round(v * 1000) / 1000;\n return `translate(${n(cx)} ${n(cy)}) rotate(${n(cfg.angle)}) translate(${n(-cx + cfg.offsetX)} ${n(-cy + cfg.offsetY)})`;\n}\n\n/**\n * Monochrome grain, applied only where the cloth is opaque enough to carry it\n * so transparent areas stay clean.\n */\nexport function applyGrain(ctx, W, H, amount, seed) {\n if (amount <= 0) return;\n const img = ctx.getImageData(0, 0, W, H);\n const d = img.data;\n const rnd = mulberry32(seed >>> 0);\n const k = amount * 90;\n for (let i = 0; i < d.length; i += 4) {\n if (d[i + 3] === 0) continue;\n const n = (rnd() - 0.5) * k;\n d[i] = Math.max(0, Math.min(255, d[i] + n));\n d[i + 1] = Math.max(0, Math.min(255, d[i + 1] + n));\n d[i + 2] = Math.max(0, Math.min(255, d[i + 2] + n));\n }\n ctx.putImageData(img, 0, 0);\n}\n\n/**\n * Fill a context with the cloth.\n * `scale` maps output pixels to context pixels (1 for export, less for preview).\n */\nexport function paint(ctx, cfg, W, H, scale, opts = {}) {\n const tile = opts.tile || buildTile(cfg);\n const cw = Math.max(1, Math.round(W * scale));\n const ch = Math.max(1, Math.round(H * scale));\n\n // A view window lets the preview draw only the visible slice of a very large\n // cloth at 1:1 instead of allocating the whole thing.\n const vx = opts.viewX || 0;\n const vy = opts.viewY || 0;\n const vw = opts.viewW != null ? opts.viewW : cw;\n const vh = opts.viewH != null ? opts.viewH : ch;\n\n ctx.setTransform(1, 0, 0, 1, 0, 0);\n ctx.clearRect(0, 0, vw, vh);\n ctx.translate(-vx, -vy);\n\n if (opts.matte) {\n ctx.fillStyle = opts.matte;\n ctx.fillRect(vx, vy, vw, vh);\n }\n\n const pat = ctx.createPattern(tileCanvas(tile), \"repeat\");\n pat.setTransform(matrix(cfg, W, H, scale));\n ctx.fillStyle = pat;\n ctx.fillRect(vx, vy, vw, vh);\n\n ctx.setTransform(1, 0, 0, 1, 0, 0);\n if (cfg.grain > 0) applyGrain(ctx, vw, vh, cfg.grain, cfg.seed + 3);\n return tile;\n}\n\n/* -------------------------------------------------------------------- SVG */\n\nexport function toSVG(cfg, W, H, opts = {}) {\n const tile = opts.tile || buildTile(cfg);\n const id = \"cloth\";\n const rects = tile.rects\n .map((r) => {\n const op = r.op >= 1 ? \"\" : ` fill-opacity=\"${r.op}\"`;\n return ``;\n })\n .join(\"\");\n\n const grain = cfg.grain > 0\n ? `` +\n `` +\n `` +\n `` +\n ``\n : \"\";\n const grainRect = cfg.grain > 0\n ? ``\n : \"\";\n\n const matte = opts.matte ? `` : \"\";\n\n return ``;\n}\n\n/** One repeat on its own — for CSS backgrounds and seamless tiling. */\nexport function tileSVG(cfg, opts = {}) {\n const tile = opts.tile || buildTile(cfg);\n const rects = tile.rects\n .map((r) => {\n const op = r.op >= 1 ? \"\" : ` fill-opacity=\"${r.op}\"`;\n return ``;\n })\n .join(\"\");\n return ``;\n}\n\nfunction escapeXml(s) {\n return String(s).replace(/[<>&\"']/g, (c) =>\n ({ \"<\": \"<\", \">\": \">\", \"&\": \"&\", '\"': \""\", \"'\": \"'\" }[c]));\n}\n\n/* ----------------------------------------------------------------- raster */\n\nexport function rasterCanvas(cfg, W, H, opts = {}) {\n const c = document.createElement(\"canvas\");\n c.width = W;\n c.height = H;\n paint(c.getContext(\"2d\"), cfg, W, H, 1, opts);\n return c;\n}\n\nexport function canvasToBlob(canvas, mime, quality) {\n return new Promise((resolve) => canvas.toBlob(resolve, mime, quality));\n}\n\nconst supportCache = new Map();\n\n/** Ask the browser whether it can actually encode a format before offering it. */\nexport async function supportsFormat(mime) {\n if (supportCache.has(mime)) return supportCache.get(mime);\n const c = document.createElement(\"canvas\");\n c.width = c.height = 2;\n const blob = await canvasToBlob(c, mime, 0.9);\n const ok = !!blob && blob.type === mime;\n supportCache.set(mime, ok);\n return ok;\n}\n\n/* -------------------------------------------------------------------- CSS */\n\nexport function toCSS(cfg, opts = {}) {\n const tile = opts.tile || buildTile(cfg);\n const svg = tileSVG(cfg, { tile });\n const uri = `data:image/svg+xml,${encodeURIComponent(svg).replace(/'/g, \"%27\").replace(/\$/g, \"%28\").replace(/\$/g, \"%29\")}`;\n const rot = cfg.angle % 360 !== 0\n ? `\\n /* rotated ${cfg.angle}° — wrap in a clipped parent and rotate that */`\n : \"\";\n return `.gingham {\\n background-image: url(\"${uri}\");\\n background-size: ${tile.w}px ${tile.h}px;\\n background-repeat: repeat;${rot}\\n}`;\n}\n",[],[99,121],"82fd330b-f558-4def-a0be-ebdd913899b0","presets.js","4f4f858a-a603-11f1-923e-1607ee4eb77e",8,["D",1788266857067],"/**\n * presets.js — the sample book.\n *\n * Defaults, named bolts, the random-bolt generator, and the URL codec that\n * lets a pattern travel as a link without ever touching a server.\n */\n\nimport { mulberry32 } from \"./gingham.js\";\n\nexport function defaults() {\n return {\n style: \"check\",\n checkX: 48,\n checkY: 48,\n linkChecks: true,\n lineRatio: 0.14,\n seed: 234,\n blend: 0.5,\n weave: \"flat\",\n threads: 6,\n weaveDepth: 0.75,\n jitter: 0.05,\n grain: 0,\n angle: 0,\n offsetX: 0,\n offsetY: 0,\n primary: { hex: \"#c8102e\", alpha: 1 },\n secondary: { hex: \"#fbf7ef\", alpha: 1 },\n accent: { hex: \"#1d3557\", alpha: 1 },\n width: 1200,\n height: 1200,\n ppi: 300,\n unit: \"in\",\n matte: \"#ffffff\",\n backdrop: \"checker\",\n };\n}\n\n/** Named bolts. Each is a full override, applied over the defaults. */\nexport const PRESETS = [\n {\n name: \"Picnic\",\n note: \"Red and white, 1/6 in check\",\n cfg: { style: \"check\", checkX: 50, checkY: 50, primary: { hex: \"#c8102e\", alpha: 1 }, secondary: { hex: \"#fdfaf3\", alpha: 1 }, weave: \"flat\", grain: 0 },\n },\n {\n name: \"Dorothy\",\n note: \"Blue vichy, fine check\",\n cfg: { style: \"check\", checkX: 26, checkY: 26, primary: { hex: \"#3f6fb5\", alpha: 1 }, secondary: { hex: \"#ffffff\", alpha: 1 } },\n },\n {\n name: \"Buffalo\",\n note: \"Big, dark, plaid-shirt scale\",\n cfg: { style: \"check\", checkX: 130, checkY: 130, primary: { hex: \"#a41219\", alpha: 1 }, secondary: { hex: \"#14100f\", alpha: 1 }, weave: \"twill\", threads: 10, weaveDepth: 0.5 },\n },\n {\n name: \"Shepherd\",\n note: \"Small twill check, undyed ground\",\n cfg: { style: \"check\", checkX: 22, checkY: 22, primary: { hex: \"#241f1c\", alpha: 1 }, secondary: { hex: \"#e8e0cd\", alpha: 1 }, weave: \"twill\", threads: 5, weaveDepth: 0.85, jitter: 0.08, grain: 0.12 },\n },\n {\n name: \"Pin check\",\n note: \"As small as it reads at 300 ppi\",\n cfg: { style: \"check\", checkX: 8, checkY: 8, primary: { hex: \"#2e5d4b\", alpha: 1 }, secondary: { hex: \"#f6f4ee\", alpha: 1 } },\n },\n {\n name: \"Nursery\",\n note: \"Soft mint, wide check\",\n cfg: { style: \"check\", checkX: 90, checkY: 90, primary: { hex: \"#7fbf9e\", alpha: 1 }, secondary: { hex: \"#fffdf6\", alpha: 1 }, blend: 0.5 },\n },\n {\n name: \"Ghost\",\n note: \"One color on nothing — keeps its alpha\",\n cfg: { style: \"check\", checkX: 64, checkY: 64, primary: { hex: \"#111827\", alpha: 1 }, secondary: { hex: \"#000000\", alpha: 0 }, backdrop: \"checker\" },\n },\n {\n name: \"Tattersall\",\n note: \"Two line colors on cream\",\n cfg: { style: \"tattersall\", checkX: 84, checkY: 84, lineRatio: 0.1, primary: { hex: \"#9d2933\", alpha: 1 }, secondary: { hex: \"#f4ecdc\", alpha: 1 }, accent: { hex: \"#22405e\", alpha: 1 } },\n },\n {\n name: \"Windowpane\",\n note: \"Charcoal hairlines on oat\",\n cfg: { style: \"windowpane\", checkX: 150, checkY: 150, lineRatio: 0.045, primary: { hex: \"#33302b\", alpha: 1 }, secondary: { hex: \"#ddd6c6\", alpha: 1 } },\n },\n {\n name: \"Madras\",\n note: \"Irregular bands, holiday palette\",\n cfg: { style: \"madras\", checkX: 34, checkY: 34, seed: 812, primary: { hex: \"#d1495b\", alpha: 1 }, secondary: { hex: \"#f7ecd9\", alpha: 1 }, accent: { hex: \"#00798c\", alpha: 1 }, weave: \"plain\", threads: 4, weaveDepth: 0.7, jitter: 0.07 },\n },\n {\n name: \"Bengal\",\n note: \"Warp stripe, no cross-check\",\n cfg: { style: \"stripe\", checkX: 30, checkY: 30, blend: 0, primary: { hex: \"#1f4e79\", alpha: 1 }, secondary: { hex: \"#fbfbf9\", alpha: 1 } },\n },\n {\n name: \"Bias neon\",\n note: \"Turned 45°, acid on ink\",\n cfg: { style: \"check\", checkX: 42, checkY: 42, angle: 45, primary: { hex: \"#c6ff3d\", alpha: 1 }, secondary: { hex: \"#12111a\", alpha: 1 }, grain: 0.1 },\n },\n];\n\nexport function applyPreset(base, preset) {\n const cfg = { ...base, ...preset.cfg };\n cfg.primary = { ...(preset.cfg.primary || base.primary) };\n cfg.secondary = { ...(preset.cfg.secondary || base.secondary) };\n cfg.accent = { ...(preset.cfg.accent || base.accent) };\n if (preset.cfg.checkX != null && preset.cfg.checkY == null) cfg.checkY = cfg.checkX;\n return cfg;\n}\n\n/* ------------------------------------------------------------- randomizer */\n\nconst HARMONIES = [\n // [secondary lightness, secondary saturation, hue offset for accent]\n { light: 0.96, sat: 0.12, accent: 165 },\n { light: 0.93, sat: 0.06, accent: -140 },\n { light: 0.1, sat: 0.35, accent: 40 },\n { light: 0.98, sat: 0.02, accent: 180 },\n];\n\nfunction hsl(h, s, l) {\n h = ((h % 360) + 360) / 360;\n const f = (n) => {\n const k = (n + h * 12) % 12;\n const a = s * Math.min(l, 1 - l);\n return Math.round(255 * (l - a * Math.max(-1, Math.min(k - 3, 9 - k, 1))));\n };\n const c = (v) => v.toString(16).padStart(2, \"0\");\n return \"#\" + c(f(0)) + c(f(8)) + c(f(4));\n}\n\n/** Pull a random bolt: coherent rather than uniformly random. */\nexport function randomBolt(base, seed) {\n const rnd = mulberry32((seed ?? Math.floor(Math.random() * 1e9)) >>> 0);\n const pick = (arr) => arr[Math.floor(rnd() * arr.length)];\n const cfg = { ...base };\n\n const hue = Math.floor(rnd() * 360);\n const h = pick(HARMONIES);\n cfg.primary = { hex: hsl(hue, 0.45 + rnd() * 0.4, 0.28 + rnd() * 0.24), alpha: 1 };\n cfg.accent = { hex: hsl(hue + h.accent, 0.4 + rnd() * 0.35, 0.3 + rnd() * 0.2), alpha: 1 };\n const transparentGround = rnd() < 0.12;\n cfg.secondary = transparentGround\n ? { hex: \"#ffffff\", alpha: 0 }\n : { hex: hsl(hue + (rnd() - 0.5) * 40, h.sat, h.light), alpha: 1 };\n\n cfg.style = pick([\"check\", \"check\", \"check\", \"windowpane\", \"tattersall\", \"triple\", \"madras\", \"stripe\"]);\n const size = pick([12, 18, 24, 32, 44, 56, 72, 96, 128]);\n cfg.checkX = size;\n cfg.checkY = rnd() < 0.85 ? size : pick([12, 24, 40, 64]);\n cfg.linkChecks = cfg.checkX === cfg.checkY;\n cfg.lineRatio = 0.05 + rnd() * 0.18;\n cfg.blend = cfg.style === \"stripe\" ? 0 : 0.5;\n cfg.seed = Math.floor(rnd() * 1000);\n cfg.weave = pick([\"flat\", \"flat\", \"plain\", \"twill\", \"basket\"]);\n cfg.threads = pick([4, 5, 6, 8]);\n cfg.weaveDepth = 0.5 + rnd() * 0.4;\n cfg.jitter = rnd() < 0.5 ? 0 : 0.04 + rnd() * 0.08;\n cfg.grain = rnd() < 0.6 ? 0 : Math.round(rnd() * 18) / 100;\n cfg.angle = rnd() < 0.8 ? 0 : pick([45, 45, 30, 15, 90]);\n return cfg;\n}\n\n/**\n * A stable, human-readable id for the current cloth. Hashed over a fixed key\n * order so the same pattern gets the same number whether it was just designed\n * or restored from a link.\n */\nexport function boltNumber(cfg) {\n const s = KEYS.map((k) => {\n const v = cfg[k];\n return v && typeof v === \"object\" ? `${v.hex}@${v.alpha}` : String(v);\n }).join(\"|\");\n let h = 2166136261;\n for (let i = 0; i < s.length; i++) {\n h ^= s.charCodeAt(i);\n h = Math.imul(h, 16777619);\n }\n return (h >>> 0).toString(36).toUpperCase().slice(0, 5).padStart(5, \"0\");\n}\n\n/* ------------------------------------------------------------------- link */\n\nconst KEYS = [\n \"style\", \"checkX\", \"checkY\", \"linkChecks\", \"lineRatio\", \"seed\", \"blend\", \"weave\",\n \"threads\", \"weaveDepth\", \"jitter\", \"grain\", \"angle\", \"offsetX\", \"offsetY\",\n \"primary\", \"secondary\", \"accent\", \"width\", \"height\", \"ppi\", \"unit\", \"matte\", \"backdrop\",\n];\n\nexport function encodeConfig(cfg) {\n const slim = {};\n for (const k of KEYS) slim[k] = cfg[k];\n const json = JSON.stringify(slim);\n return btoa(unescape(encodeURIComponent(json))).replace(/\\+/g, \"-\").replace(/\\//g, \"_\").replace(/=+$/, \"\");\n}\n\nexport function decodeConfig(str) {\n try {\n const b64 = str.replace(/-/g, \"+\").replace(/_/g, \"/\");\n const json = decodeURIComponent(escape(atob(b64)));\n const parsed = JSON.parse(json);\n const cfg = defaults();\n for (const k of KEYS) if (parsed[k] !== undefined) cfg[k] = parsed[k];\n return cfg;\n } catch {\n return null;\n }\n}\n",[],[99,130],"4d183f66-98c9-4ba2-bc49-f4340afd4181","index.html","4f46c97c-a603-11f1-94e9-1607ee4eb77e",7,["D",1788266857027],"\n\n\n\n\nGingham Mill — weave a check, cut it to size\n\n\n\n\n\n\n\n\n\n

\n \n

Gingham Mill

\n\n

\n bolt —\n cloth —\n repeat —\n

\n\n

\n \n \n

\n \n

\n\n

\n\n \n

\n\n

the clothPattern

\n\n

Sample book

\n\n

warp & weftYarns

\n\n

\n Primary\n \n \n \n

\n Opacity\n \n 100%\n

\n\n

\n Secondary\n \n \n \n

\n Opacity\n \n 100%\n

\n\n

\n Accent\n \n \n \n

\n Opacity\n \n 100%\n

\n\n

\n Balance\n \n even\n

Which set of threads shows at a crossing. Even gives you the classic three tones from two colors.

\n\n

settGrid

\n\n

\n Check width\n

\n px\n 0.160 in\n

\n\n \n\n

\n Check height\n

\n px\n 0.160 in\n

\n\n

\n Line weight\n \n 14%\n

\n\n

\n Band shuffle\n \n 234\n

\n\n

\n Grain angle\n \n 0°\n

\n \n \n \n

\n\n

\n Shift across\n \n 0 px\n

\n Shift down\n \n 0 px\n

\n\n

interlacingWeave

Flat keeps every check a solid block — the cleanest export and the smallest file.

\n\n

\n Threads per check\n \n 6\n

\n Weave contrast\n \n 75%\n

\n Yarn variation\n \n 5%\n

\n\n

\n Grain\n \n off\n

Grain is per-pixel noise. It exports exactly in raster formats; SVG approximates it with a turbulence filter.

\n\n

the boltCloth size

\n\n

\n Width\n

\n px\n in\n

\n\n

\n Height\n

\n px\n in\n

\n\n

\n Resolution\n

\n ppi\n print\n

\n\n

\n \n \n \n \n \n

\n \n

\n\n \n

\n\n

\n \n one repeat\n

\n\n

\n \n \n \n \n

\n \n \n

\n\n \n

cutting tableExport

\n\n

\n \n \n \n \n \n

\n\n

\n Quality\n \n 92\n

\n JPEG matte\n \n

\n\n

Take it somewhere else

\n \n \n \n \n \n

\n\n

\n Nothing leaves your machine. Every pixel here is drawn by your browser —\n there is no render server, and no image is ever uploaded.\n

\n\n

\n\n\n\n\n",[],[99,138],"1133fa07-d19a-46c8-87e4-f53039f0ae24","gingham.js","4f9923b6-a603-11f1-af46-1607ee4eb77e",14,["D",1788266856889],"/**\n * gingham.js — the loom.\n *\n * Pure geometry + color. No DOM, no side effects. Everything downstream\n * (canvas preview, SVG export, CSS export, preset chips) is drawn from the\n * single tile this module builds, so every output format agrees exactly.\n *\n * Model: a woven cloth is warp threads (columns) crossed by weft threads\n * (rows). Each axis is a repeating sequence of bands; each band is dyed with\n * one of three yarns. The color at an intersection is a mix of its warp yarn\n * and its weft yarn — which is why classic gingham reads as three tones from\n * two colors (white/white, white/red, red/red).\n */\n\nexport const YARN = { GROUND: 0, PRIMARY: 1, ACCENT: 2 };\n\nexport const STYLES = [\n { id: \"check\", name: \"Gingham\", blurb: \"The classic even check\", accent: false },\n { id: \"windowpane\", name: \"Windowpane\", blurb: \"Thin lines, wide panes\", accent: false },\n { id: \"tattersall\", name: \"Tattersall\", blurb: \"Two colors of fine line\", accent: true },\n { id: \"triple\", name: \"Triple check\", blurb: \"Three-tone grid\", accent: true },\n { id: \"madras\", name: \"Madras\", blurb: \"Irregular, seeded bands\", accent: true },\n { id: \"stripe\", name: \"Bengal stripe\", blurb: \"Warp only, no cross-check\", accent: false },\n];\n\nexport const WEAVES = [\n { id: \"flat\", name: \"Flat\" },\n { id: \"plain\", name: \"Plain\" },\n { id: \"twill\", name: \"Twill\" },\n { id: \"basket\", name: \"Basket\" },\n];\n\n/* ------------------------------------------------------------------ color */\n\nexport function mulberry32(a) {\n return function () {\n a |= 0;\n a = (a + 0x6d2b79f5) | 0;\n let t = Math.imul(a ^ (a >>> 15), 1 | a);\n t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;\n return ((t ^ (t >>> 14)) >>> 0) / 4294967296;\n };\n}\n\nexport function hexToRgb(hex) {\n let h = String(hex || \"\").trim().replace(/^#/, \"\");\n if (h.length === 3) h = h.split(\"\").map((c) => c + c).join(\"\");\n if (h.length === 8) h = h.slice(0, 6);\n if (!/^[0-9a-fA-F]{6}$/.test(h)) h = \"000000\";\n const n = parseInt(h, 16);\n return { r: (n >> 16) & 255, g: (n >> 8) & 255, b: n & 255 };\n}\n\nexport function rgbToHex({ r, g, b }) {\n const c = (v) => Math.max(0, Math.min(255, Math.round(v))).toString(16).padStart(2, \"0\");\n return \"#\" + c(r) + c(g) + c(b);\n}\n\nexport function yarn(hex, alpha) {\n const { r, g, b } = hexToRgb(hex);\n return { r, g, b, a: Math.max(0, Math.min(1, alpha)) };\n}\n\n/** Mix two colors in premultiplied space so transparency survives correctly. */\nexport function mixPremul(c1, c2, t) {\n const u = 1 - t;\n const a = c1.a * u + c2.a * t;\n if (a <= 1e-6) return { r: 0, g: 0, b: 0, a: 0 };\n return {\n r: (c1.r * c1.a * u + c2.r * c2.a * t) / a,\n g: (c1.g * c1.a * u + c2.g * c2.a * t) / a,\n b: (c1.b * c1.a * u + c2.b * c2.a * t) / a,\n a,\n };\n}\n\n/** Multiply lightness — used for per-thread yarn variation. */\nexport function shade(c, f) {\n return { r: c.r * f, g: c.g * f, b: c.b * f, a: c.a };\n}\n\nexport function toFill(c) {\n const fill = rgbToHex(c);\n const op = Math.round(c.a * 1000) / 1000;\n const css = op >= 1\n ? fill\n : `rgba(${Math.round(c.r)},${Math.round(c.g)},${Math.round(c.b)},${op})`;\n return { fill, op, css };\n}\n\nexport function relLuminance(hex) {\n const { r, g, b } = hexToRgb(hex);\n const f = (v) => {\n const s = v / 255;\n return s <= 0.03928 ? s / 12.92 : Math.pow((s + 0.055) / 1.055, 2.4);\n };\n return 0.2126 * f(r) + 0.7152 * f(g) + 0.0722 * f(b);\n}\n\n/* ------------------------------------------------------------------ bands */\n\n/** Band sequence for one axis, in units of the check size. */\nfunction bandSpec(cfg, axis) {\n const r = Math.max(0.04, Math.min(0.96, cfg.lineRatio));\n const G = YARN.GROUND, P = YARN.PRIMARY, A = YARN.ACCENT;\n switch (cfg.style) {\n case \"windowpane\":\n return [{ u: r, y: P }, { u: 1 - r, y: G }];\n case \"tattersall\":\n return [{ u: r, y: P }, { u: 1 - r, y: G }, { u: r, y: A }, { u: 1 - r, y: G }];\n case \"triple\":\n return [{ u: 1, y: G }, { u: 1, y: P }, { u: 1, y: G }, { u: 1, y: A }];\n case \"stripe\":\n return axis === \"warp\" ? [{ u: 1, y: G }, { u: 1, y: P }] : [{ u: 1, y: G }];\n case \"madras\":\n return madrasBands(cfg.seed + (axis === \"warp\" ? 0 : 1013));\n case \"check\":\n default:\n return [{ u: 1, y: G }, { u: 1, y: P }];\n }\n}\n\nfunction madrasBands(seed) {\n const rnd = mulberry32(seed >>> 0);\n const widths = [0.5, 0.75, 1, 1, 1.5, 2, 3];\n const pick = () => widths[Math.floor(rnd() * widths.length)];\n const groups = 4 + Math.floor(rnd() * 4);\n const out = [];\n for (let i = 0; i < groups; i++) {\n out.push({ u: pick(), y: YARN.GROUND });\n out.push({ u: rnd() < 0.62 ? 0.5 : pick(), y: rnd() < 0.6 ? YARN.PRIMARY : YARN.ACCENT });\n }\n return out;\n}\n\n/**\n * Turn float widths into whole pixels without losing the total. Cumulative\n * rounding keeps every band edge on a pixel boundary, so the tile stays crisp\n * and the SVG and the PNG land on exactly the same coordinates.\n */\nfunction snapWidths(units, scale) {\n let acc = 0, emitted = 0;\n const out = [];\n for (const u of units) {\n acc += u * scale;\n const w = Math.max(1, Math.round(acc) - emitted);\n out.push(w);\n emitted += w;\n }\n return out;\n}\n\n/**\n * Expand bands into strands. Flat cloth gets one strand per band; a woven\n * cloth subdivides each band into individual threads that can pass over and\n * under each other.\n */\nfunction strands(pxWidths, spec, threadPx, rnd, jitter) {\n const out = [];\n let x = 0, i = 0;\n for (let b = 0; b < pxWidths.length; b++) {\n const bandW = pxWidths[b], y = spec[b].y;\n if (!threadPx) {\n out.push({ x, w: bandW, y, j: 1, i: i++ });\n x += bandW;\n continue;\n }\n const count = Math.max(1, Math.round(bandW / threadPx));\n const parts = snapWidths(new Array(count).fill(1), bandW / count);\n let used = 0;\n for (let k = 0; k < count; k++) {\n const w = k === count - 1 ? bandW - used : parts[k];\n used += w;\n if (w <= 0) continue;\n out.push({ x, w, y, j: 1 + (rnd() - 0.5) * 2 * jitter, i: i++ });\n x += w;\n }\n }\n return out;\n}\n\nfunction warpOnTop(weave, i, j) {\n switch (weave) {\n case \"twill\": return (((i - j) % 4) + 4) % 4 < 2;\n case \"basket\": return ((i >> 1) + (j >> 1)) % 2 === 0;\n case \"plain\":\n default: return (i + j) % 2 === 0;\n }\n}\n\nconst MAX_RECTS = 44000;\n\n/**\n * Build one repeat of the cloth.\n * Returns integer-pixel rects covering a tile of exactly w x h.\n */\nexport function buildTile(cfg) {\n const warpSpec = bandSpec(cfg, \"warp\");\n const weftSpec = bandSpec(cfg, \"weft\");\n const warpPx = snapWidths(warpSpec.map((b) => b.u), Math.max(1, cfg.checkX));\n const weftPx = snapWidths(weftSpec.map((b) => b.u), Math.max(1, cfg.checkY));\n const tileW = warpPx.reduce((a, b) => a + b, 0);\n const tileH = weftPx.reduce((a, b) => a + b, 0);\n\n const woven = cfg.weave !== \"flat\";\n let threadPx = null;\n if (woven) {\n threadPx = Math.max(1, Math.round(Math.min(cfg.checkX, cfg.checkY) / cfg.threads));\n // Keep the tile within a rect budget so huge weaves cannot stall export.\n while (Math.ceil(tileW / threadPx) * Math.ceil(tileH / threadPx) > MAX_RECTS) threadPx++;\n }\n\n const jitter = woven ? cfg.jitter : 0;\n const cols = strands(warpPx, warpSpec, threadPx, mulberry32(cfg.seed + 7), jitter);\n const rows = strands(weftPx, weftSpec, threadPx, mulberry32(cfg.seed + 991), jitter);\n\n const yarns = [cfg.colors.secondary, cfg.colors.primary, cfg.colors.accent];\n const depth = woven ? cfg.weaveDepth : 0;\n const base = Math.max(0, Math.min(1, cfg.blend));\n\n const rects = [];\n for (const row of rows) {\n let run = null;\n for (const col of cols) {\n let t = base;\n if (woven) {\n t = warpOnTop(cfg.weave, col.i, row.i) ? base * (1 - depth) : base + (1 - base) * depth;\n }\n let c = mixPremul(yarns[col.y], yarns[row.y], t);\n if (jitter) c = shade(c, col.j * (1 - t) + row.j * t);\n const f = toFill(c);\n // Merge equal neighbours into runs: keeps flat gingham at 4 rects and\n // trims a woven tile substantially.\n if (run && run.css === f.css) {\n run.w += col.w;\n } else {\n run = { x: col.x, y: row.x, w: col.w, h: row.w, ...f };\n rects.push(run);\n }\n }\n }\n\n return { w: tileW, h: tileH, rects, threadPx, cols: cols.length, rows: rows.length };\n}\n\n/* -------------------------------------------------------------- measuring */\n\nexport const CM_PER_IN = 2.54;\n\nexport function pxToUnit(px, ppi, unit) {\n const inches = px / Math.max(1, ppi);\n return unit === \"cm\" ? inches * CM_PER_IN : inches;\n}\n\nexport function unitToPx(value, ppi, unit) {\n const inches = unit === \"cm\" ? value / CM_PER_IN : value;\n return inches * Math.max(1, ppi);\n}\n\nexport function fmtLen(px, ppi, unit, digits) {\n const v = pxToUnit(px, ppi, unit);\n const d = digits != null ? digits : v < 1 ? 3 : v < 10 ? 2 : 1;\n return v.toFixed(d);\n}\n",[],[99,146],"861db297-da87-4a2c-8c5c-ea36b1005f69","favicon.svg","4f644cc2-a603-11f1-b365-1607ee4eb77e",10,["D",1788266857181],"\n",[],[99,154],"9a122d0a-45e6-4344-962b-ebb0404c03c9","app.js","4f78532a-a603-11f1-b20a-1607ee4eb77e",11,["D",1788266857184],"/**\n * app.js — the mill floor.\n *\n * Holds the working state, keeps the controls and the cloth in step, draws the\n * rulers, and cuts the finished piece. Everything runs locally: the only\n * network requests this page makes are for its own files and fonts.\n */\n\nimport {\n buildTile, yarn, fmtLen, pxToUnit, unitToPx,\n STYLES, WEAVES, relLuminance, hexToRgb, rgbToHex,\n} from \"./gingham.js\";\nimport {\n paint, toSVG, tileSVG, rasterCanvas, canvasToBlob, supportsFormat, toCSS,\n} from \"./render.js\";\nimport {\n defaults, PRESETS, applyPreset, randomBolt, boltNumber, encodeConfig, decodeConfig,\n} from \"./presets.js\";\n\nconst $ = (id) => document.getElementById(id);\n\nlet state = (location.hash.length > 1 && decodeConfig(location.hash.slice(1))) || defaults();\nlet zoom = \"fit\";\nlet tile = null;\nlet view = { scale: 1, dispW: 0, dispH: 0, sx: 0, sy: 0 };\n\nconst swatchScroll = $(\"swatchScroll\");\nconst swatch = $(\"swatch\");\nconst preview = $(\"preview\");\nconst pctx = preview.getContext(\"2d\");\n\n/* ----------------------------------------------------------- state → engine */\n\nfunction engineCfg(s) {\n return {\n style: s.style,\n checkX: s.checkX,\n checkY: s.checkY,\n lineRatio: s.lineRatio,\n seed: s.seed,\n blend: s.blend,\n weave: s.weave,\n threads: s.threads,\n weaveDepth: s.weaveDepth,\n jitter: s.jitter,\n grain: s.grain,\n angle: s.angle,\n offsetX: s.offsetX,\n offsetY: s.offsetY,\n colors: {\n primary: yarn(s.primary.hex, s.primary.alpha),\n secondary: yarn(s.secondary.hex, s.secondary.alpha),\n accent: yarn(s.accent.hex, s.accent.alpha),\n },\n };\n}\n\nfunction styleDef() {\n return STYLES.find((s) => s.id === state.style) || STYLES[0];\n}\n\n/* ------------------------------------------------------------------ chrome */\n\n/** Lift a color until it can carry small text on the indigo ground. */\nfunction readableOnDark(hex) {\n let c = hexToRgb(hex);\n for (let i = 0; i < 14 && relLuminance(rgbToHex(c)) < 0.3; i++) {\n c = { r: c.r + (255 - c.r) * 0.2, g: c.g + (255 - c.g) * 0.2, b: c.b + (255 - c.b) * 0.2 };\n }\n return rgbToHex(c);\n}\n\n/** The instrument takes its accent from the cloth on the loom. */\nfunction tintUI() {\n let src = \"#d8a13a\";\n if (state.primary.alpha > 0.25) src = state.primary.hex;\n else if (state.secondary.alpha > 0.25) src = state.secondary.hex;\n const accent = readableOnDark(src);\n const root = document.documentElement.style;\n root.setProperty(\"--accent\", accent);\n root.setProperty(\"--accent-ink\", relLuminance(accent) > 0.45 ? \"#11161c\" : \"#f7f4ec\");\n}\n\nlet toastTimer;\nfunction toast(msg) {\n const el = $(\"toast\");\n el.textContent = msg;\n el.classList.add(\"is-up\");\n clearTimeout(toastTimer);\n toastTimer = setTimeout(() => el.classList.remove(\"is-up\"), 2200);\n}\n\n/* ---------------------------------------------------------------- preview */\n\nfunction drawPreview(cfg) {\n const availW = Math.max(40, swatchScroll.clientWidth);\n const availH = Math.max(40, swatchScroll.clientHeight);\n const W = state.width, H = state.height;\n\n const scale = zoom === \"fit\" ? Math.min(availW / W, availH / H, 1) : 1;\n const dispW = Math.max(1, Math.round(W * scale));\n const dispH = Math.max(1, Math.round(H * scale));\n swatch.style.width = dispW + \"px\";\n swatch.style.height = dispH + \"px\";\n\n const viewW = Math.min(dispW, availW);\n const viewH = Math.min(dispH, availH);\n const sx = Math.min(swatchScroll.scrollLeft, Math.max(0, dispW - viewW));\n const sy = Math.min(swatchScroll.scrollTop, Math.max(0, dispH - viewH));\n\n // Lay the cloth in the middle of the table when it fits; the rulers follow it.\n const padX = zoom === \"fit\" ? Math.max(0, Math.floor((availW - dispW) / 2)) : 0;\n const padY = zoom === \"fit\" ? Math.max(0, Math.floor((availH - dispH) / 2)) : 0;\n swatch.style.marginLeft = padX + \"px\";\n swatch.style.marginTop = padY + \"px\";\n\n const dpr = Math.min(2, window.devicePixelRatio || 1);\n preview.style.left = sx + \"px\";\n preview.style.top = sy + \"px\";\n preview.style.width = viewW + \"px\";\n preview.style.height = viewH + \"px\";\n preview.width = Math.max(1, Math.round(viewW * dpr));\n preview.height = Math.max(1, Math.round(viewH * dpr));\n\n paint(pctx, cfg, W, H, scale * dpr, {\n tile,\n viewX: Math.round(sx * dpr),\n viewY: Math.round(sy * dpr),\n viewW: preview.width,\n viewH: preview.height,\n });\n\n view = { scale, dispW, dispH, sx, sy, padX, padY };\n\n // The mat is ruled in whatever unit you are working in.\n const gridPx = unitToPx(1, state.ppi, state.unit) * scale;\n const step = gridPx > 14 ? gridPx : gridPx > 3 ? gridPx * 4 : 0;\n document.getElementById(\"mat\").style.setProperty(\n \"--mat-grid\", step ? `${step}px ${step}px` : \"0 0\");\n}\n\n/* ----------------------------------------------------------------- rulers */\n\nconst TICK_LADDER = [1, 2, 5, 10, 20, 50, 100, 200, 500];\n\nfunction subdivisions(unitPx, unit) {\n if (unit === \"cm\") {\n if (unitPx > 90) return 10;\n if (unitPx > 45) return 5;\n return unitPx > 22 ? 2 : 1;\n }\n if (unitPx > 150) return 8;\n if (unitPx > 76) return 4;\n return unitPx > 36 ? 2 : 1;\n}\n\nfunction drawRuler(cv, axis) {\n const dpr = Math.min(2, window.devicePixelRatio || 1);\n const cssLen = (axis === \"x\" ? cv.clientWidth : cv.clientHeight) ||\n (axis === \"x\" ? swatchScroll.clientWidth : swatchScroll.clientHeight);\n const thick = 30;\n cv.width = Math.max(1, Math.round((axis === \"x\" ? cssLen : thick) * dpr));\n cv.height = Math.max(1, Math.round((axis === \"x\" ? thick : cssLen) * dpr));\n\n const ctx = cv.getContext(\"2d\");\n ctx.setTransform(dpr, 0, 0, dpr, 0, 0);\n const css = getComputedStyle(document.documentElement);\n const accent = css.getPropertyValue(\"--accent\").trim() || \"#d8a13a\";\n ctx.clearRect(0, 0, cv.width, cv.height);\n\n const unitPx = unitToPx(1, state.ppi, state.unit) * view.scale;\n if (!isFinite(unitPx) || unitPx <= 0) return;\n\n let step = TICK_LADDER.find((s) => s * unitPx >= 38) || 500;\n const subs = subdivisions(unitPx * step, state.unit);\n const scroll = axis === \"x\" ? view.sx : view.sy;\n const pad = (axis === \"x\" ? view.padX : view.padY) || 0;\n const clothLen = axis === \"x\" ? view.dispW : view.dispH;\n const minor = unitPx * step / subs;\n\n ctx.font = \"500 9px 'IBM Plex Mono', ui-monospace, monospace\";\n ctx.textBaseline = axis === \"x\" ? \"alphabetic\" : \"middle\";\n\n // The cloth edge, marked in the accent so the zero point is unmistakable.\n ctx.fillStyle = accent;\n const edge = Math.max(0, Math.min(cssLen - pad, clothLen - scroll));\n if (axis === \"x\") ctx.fillRect(pad, thick - 1.5, edge, 1.5);\n else ctx.fillRect(thick - 1.5, pad, 1.5, edge);\n\n let i = 0;\n for (;; i++) {\n const pos = i * minor - scroll + pad;\n if (pos > cssLen + 1) break;\n if (i * minor > clothLen + 1) break;\n if (pos < -1) continue;\n\n const isMajor = i % subs === 0;\n const isHalf = !isMajor && subs % 2 === 0 && i % (subs / 2) === 0;\n const len = isMajor ? 11 : isHalf ? 7 : 4;\n ctx.fillStyle = isMajor ? \"#93a6b8\" : \"#4d6175\";\n\n if (axis === \"x\") {\n ctx.fillRect(Math.round(pos), thick - 2 - len, 1, len);\n if (isMajor) {\n const label = String((i / subs) * step);\n ctx.fillStyle = \"#93a6b8\";\n ctx.fillText(label, Math.round(pos) + 3, 11);\n }\n } else {\n ctx.fillRect(thick - 2 - len, Math.round(pos), len, 1);\n if (isMajor) {\n const label = String((i / subs) * step);\n ctx.fillStyle = \"#93a6b8\";\n ctx.save();\n ctx.translate(4, Math.round(pos) + 9);\n ctx.fillText(label, 0, 0);\n ctx.restore();\n }\n }\n }\n}\n\nfunction drawRulers() {\n drawRuler($(\"rulerTop\"), \"x\");\n drawRuler($(\"rulerLeft\"), \"y\");\n}\n\n/* -------------------------------------------------------------- readouts */\n\nfunction unitName() {\n return state.unit === \"cm\" ? \"cm\" : \"in\";\n}\n\nfunction updateReadouts() {\n const u = unitName();\n $(\"specBolt\").textContent = \"№ \" + boltNumber(state);\n $(\"specSize\").textContent =\n `${state.width}×${state.height} px · ${fmtLen(state.width, state.ppi, state.unit, 2)}×${fmtLen(state.height, state.ppi, state.unit, 2)} ${u} @ ${state.ppi} ppi`;\n\n const across = state.width / tile.w;\n const down = state.height / tile.h;\n $(\"specRepeat\").textContent = `${tile.w}×${tile.h} px · ${across.toFixed(1)}×${down.toFixed(1)}`;\n\n $(\"caliperText\").textContent =\n `one repeat — ${tile.w}×${tile.h} px, ${fmtLen(tile.w, state.ppi, state.unit)}×${fmtLen(tile.h, state.ppi, state.unit)} ${u}` +\n (tile.threadPx ? ` · ${tile.threadPx} px thread` : \"\");\n\n $(\"checkXOut\").textContent = `${fmtLen(state.checkX, state.ppi, state.unit)} ${u}`;\n $(\"checkYOut\").textContent = `${fmtLen(state.checkY, state.ppi, state.unit)} ${u}`;\n $(\"unitBadge\").textContent = u;\n for (const el of document.querySelectorAll(\".unit-label\")) el.textContent = u;\n\n const mp = (state.width * state.height) / 1e6;\n const warn = $(\"sizeWarn\");\n if (mp > 16) {\n warn.hidden = false;\n warn.textContent = `${mp.toFixed(1)} megapixels. Raster export will take a moment and needs about ${(mp * 4).toFixed(0)} MB of memory; mobile Safari caps canvases near 16 MP.`;\n } else {\n warn.hidden = true;\n }\n\n const ppiNote = state.ppi >= 250 ? \"print\" : state.ppi >= 144 ? \"retina\" : \"screen\";\n $(\"ppiNote\").textContent = ppiNote;\n}\n\n/* ------------------------------------------------------------ render loop */\n\nlet queued = false;\nfunction schedule() {\n if (queued) return;\n queued = true;\n requestAnimationFrame(() => {\n queued = false;\n const cfg = engineCfg(state);\n tile = buildTile(cfg);\n tintUI();\n drawPreview(cfg);\n drawRulers();\n updateReadouts();\n pushHash();\n });\n}\n\nlet hashTimer;\nfunction pushHash() {\n clearTimeout(hashTimer);\n hashTimer = setTimeout(() => {\n history.replaceState(null, \"\", \"#\" + encodeConfig(state));\n }, 500);\n}\n\n/* ------------------------------------------------------------- build UI */\n\nfunction buildStyleGrid() {\n const grid = $(\"styleGrid\");\n grid.innerHTML = \"\";\n for (const s of STYLES) {\n const b = document.createElement(\"button\");\n b.type = \"button\";\n b.className = \"style-btn\";\n b.dataset.style = s.id;\n b.textContent = s.name;\n b.setAttribute(\"role\", \"radio\");\n b.addEventListener(\"click\", () => {\n if (state.style === \"stripe\" && s.id !== \"stripe\" && state.blend === 0) state.blend = 0.5;\n if (s.id === \"stripe\" && state.blend === 0.5) state.blend = 0;\n state.style = s.id;\n syncControls();\n schedule();\n });\n grid.appendChild(b);\n }\n}\n\nfunction buildWeaveSeg() {\n const seg = $(\"weaveSeg\");\n seg.innerHTML = \"\";\n for (const w of WEAVES) {\n const b = document.createElement(\"button\");\n b.type = \"button\";\n b.className = \"seg-btn\";\n b.dataset.weave = w.id;\n b.textContent = w.name.toLowerCase();\n b.addEventListener(\"click\", () => {\n state.weave = w.id;\n syncControls();\n schedule();\n });\n seg.appendChild(b);\n }\n}\n\nconst CHIP_PX = 96;\n\nfunction buildChips() {\n const wrap = $(\"presetChips\");\n wrap.innerHTML = \"\";\n for (const preset of PRESETS) {\n const btn = document.createElement(\"button\");\n btn.type = \"button\";\n btn.className = \"chip\";\n btn.title = preset.note;\n\n const cv = document.createElement(\"canvas\");\n cv.width = cv.height = CHIP_PX;\n const cfg = engineCfg(applyPreset(defaults(), preset));\n // Normalise every chip to show roughly two repeats, so the sample book\n // reads as a set rather than a jumble of scales.\n const probe = buildTile(cfg);\n const k = Math.min(4, Math.max(0.06, (CHIP_PX / 2.2) / Math.max(probe.w, probe.h)));\n const chipCfg = {\n ...cfg,\n checkX: Math.max(1, Math.round(cfg.checkX * k)),\n checkY: Math.max(1, Math.round(cfg.checkY * k)),\n grain: 0,\n };\n const ctx = cv.getContext(\"2d\");\n paint(ctx, chipCfg, CHIP_PX, CHIP_PX, 1);\n // Slide a checkerboard underneath so a transparent yarn reads as clear\n // rather than as the panel behind it.\n ctx.globalCompositeOperation = \"destination-over\";\n ctx.fillStyle = \"#c9c9c9\";\n ctx.fillRect(0, 0, CHIP_PX, CHIP_PX);\n ctx.fillStyle = \"#9a9a9a\";\n for (let y = 0; y < CHIP_PX; y += 8) {\n for (let x = 0; x < CHIP_PX; x += 8) {\n if (((x + y) / 8) % 2 === 0) ctx.fillRect(x, y, 8, 8);\n }\n }\n ctx.globalCompositeOperation = \"source-over\";\n\n const name = document.createElement(\"b\");\n name.textContent = preset.name;\n btn.append(cv, name);\n btn.addEventListener(\"click\", () => {\n const keep = { width: state.width, height: state.height, ppi: state.ppi, unit: state.unit, matte: state.matte };\n state = { ...applyPreset(defaults(), preset), ...keep };\n syncControls();\n schedule();\n toast(`${preset.name} — ${preset.note}`);\n });\n wrap.appendChild(btn);\n }\n}\n\n/* --------------------------------------------------- controls → state ← */\n\nfunction syncControls() {\n const s = state;\n\n for (const b of document.querySelectorAll(\".style-btn\")) {\n const on = b.dataset.style === s.style;\n b.classList.toggle(\"is-on\", on);\n b.setAttribute(\"aria-checked\", on ? \"true\" : \"false\");\n }\n $(\"styleBlurb\").textContent = styleDef().blurb + \".\";\n\n for (const b of document.querySelectorAll(\"#weaveSeg .seg-btn\")) {\n b.classList.toggle(\"is-on\", b.dataset.weave === s.weave);\n }\n for (const b of document.querySelectorAll(\"[data-unit]\")) {\n b.classList.toggle(\"is-on\", b.dataset.unit === s.unit);\n }\n for (const b of document.querySelectorAll(\"[data-backdrop]\")) {\n b.classList.toggle(\"is-on\", b.dataset.backdrop === s.backdrop);\n }\n for (const b of document.querySelectorAll(\"[data-zoom]\")) {\n b.classList.toggle(\"is-on\", b.dataset.zoom === zoom);\n }\n swatch.dataset.backdrop = s.backdrop;\n\n for (const key of [\"primary\", \"secondary\", \"accent\"]) {\n setVal($(key + \"Color\"), s[key].hex);\n setVal($(key + \"Hex\"), s[key].hex);\n $(key + \"Alpha\").value = Math.round(s[key].alpha * 100);\n $(key + \"AlphaOut\").textContent =\n s[key].alpha === 0 ? \"clear\" : Math.round(s[key].alpha * 100) + \"%\";\n }\n $(\"accentYarn\").hidden = !styleDef().accent;\n\n $(\"blend\").value = Math.round(s.blend * 100);\n $(\"blendOut\").textContent =\n s.blend === 0.5 ? \"even\" : s.blend === 0 ? \"warp\" : s.blend === 1 ? \"weft\" : Math.round(s.blend * 100) + \"%\";\n\n setVal($(\"checkX\"), s.checkX);\n setVal($(\"checkY\"), s.checkY);\n $(\"linkChecks\").classList.toggle(\"is-on\", s.linkChecks);\n $(\"linkChecks\").setAttribute(\"aria-pressed\", s.linkChecks ? \"true\" : \"false\");\n $(\"checkYRow\").hidden = s.linkChecks;\n\n $(\"lineRatioRow\").hidden = !(s.style === \"windowpane\" || s.style === \"tattersall\");\n $(\"lineRatio\").value = Math.round(s.lineRatio * 100);\n $(\"lineRatioOut\").textContent = Math.round(s.lineRatio * 100) + \"%\";\n\n $(\"seedRow\").hidden = s.style !== \"madras\";\n $(\"seed\").value = s.seed;\n $(\"seedOut\").textContent = s.seed;\n\n $(\"angle\").value = s.angle;\n $(\"angleOut\").textContent = s.angle + \"°\";\n $(\"offsetX\").value = s.offsetX;\n $(\"offsetXOut\").textContent = s.offsetX + \" px\";\n $(\"offsetY\").value = s.offsetY;\n $(\"offsetYOut\").textContent = s.offsetY + \" px\";\n\n for (const el of document.querySelectorAll(\".weave-only\")) el.hidden = s.weave === \"flat\";\n $(\"weaveHint\").textContent = s.weave === \"flat\"\n ? \"Flat keeps every check a solid block — the cleanest export and the smallest file.\"\n : \"Threads pass over and under each other. Zoom to 1:1 to see the interlacing.\";\n\n $(\"threads\").value = s.threads;\n $(\"threadsOut\").textContent = s.threads;\n $(\"weaveDepth\").value = Math.round(s.weaveDepth * 100);\n $(\"weaveDepthOut\").textContent = Math.round(s.weaveDepth * 100) + \"%\";\n $(\"jitter\").value = Math.round(s.jitter * 100);\n $(\"jitterOut\").textContent = Math.round(s.jitter * 100) + \"%\";\n $(\"grain\").value = Math.round(s.grain * 100);\n $(\"grainOut\").textContent = s.grain === 0 ? \"off\" : Math.round(s.grain * 100) + \"%\";\n\n setVal($(\"width\"), s.width);\n setVal($(\"height\"), s.height);\n setVal($(\"ppi\"), s.ppi);\n setVal($(\"widthUnit\"), round2(pxToUnit(s.width, s.ppi, s.unit)));\n setVal($(\"heightUnit\"), round2(pxToUnit(s.height, s.ppi, s.unit)));\n $(\"matteColor\").value = s.matte;\n}\n\n/** Never overwrite the field currently under the cursor. */\nfunction setVal(el, v) {\n if (el !== document.activeElement) el.value = v;\n}\n\nfunction round2(v) {\n return Math.round(v * 100) / 100;\n}\n\nfunction clampInt(v, lo, hi, fallback) {\n const n = Math.round(Number(v));\n if (!isFinite(n)) return fallback;\n return Math.max(lo, Math.min(hi, n));\n}\n\n/* --------------------------------------------------------------- wiring */\n\nfunction wire() {\n // Yarn colors\n for (const key of [\"primary\", \"secondary\", \"accent\"]) {\n $(key + \"Color\").addEventListener(\"input\", (e) => {\n state[key] = { hex: e.target.value, alpha: state[key].alpha > 0 ? state[key].alpha : 1 };\n syncControls();\n schedule();\n });\n $(key + \"Hex\").addEventListener(\"change\", (e) => {\n const v = e.target.value.trim();\n if (/^#?[0-9a-fA-F]{3}$|^#?[0-9a-fA-F]{6}$/.test(v)) {\n state[key].hex = rgbToHex(hexToRgb(v));\n }\n syncControls();\n schedule();\n });\n $(key + \"Alpha\").addEventListener(\"input\", (e) => {\n state[key].alpha = Number(e.target.value) / 100;\n syncControls();\n schedule();\n });\n }\n for (const b of document.querySelectorAll(\"[data-clear]\")) {\n b.addEventListener(\"click\", () => {\n const k = b.dataset.clear;\n state[k].alpha = state[k].alpha === 0 ? 1 : 0;\n syncControls();\n schedule();\n });\n }\n\n slider(\"blend\", (v) => (state.blend = v / 100));\n slider(\"lineRatio\", (v) => (state.lineRatio = v / 100));\n slider(\"seed\", (v) => (state.seed = v));\n slider(\"angle\", (v) => (state.angle = v));\n slider(\"offsetX\", (v) => (state.offsetX = v));\n slider(\"offsetY\", (v) => (state.offsetY = v));\n slider(\"threads\", (v) => (state.threads = v));\n slider(\"weaveDepth\", (v) => (state.weaveDepth = v / 100));\n slider(\"jitter\", (v) => (state.jitter = v / 100));\n slider(\"grain\", (v) => (state.grain = v / 100));\n\n $(\"checkX\").addEventListener(\"input\", (e) => {\n state.checkX = clampInt(e.target.value, 1, 2000, state.checkX);\n if (state.linkChecks) state.checkY = state.checkX;\n syncControls();\n schedule();\n });\n $(\"checkY\").addEventListener(\"input\", (e) => {\n state.checkY = clampInt(e.target.value, 1, 2000, state.checkY);\n syncControls();\n schedule();\n });\n $(\"linkChecks\").addEventListener(\"click\", () => {\n state.linkChecks = !state.linkChecks;\n if (state.linkChecks) state.checkY = state.checkX;\n syncControls();\n schedule();\n });\n\n for (const b of document.querySelectorAll(\"#angleQuick .tiny\")) {\n b.addEventListener(\"click\", () => {\n state.angle = Number(b.dataset.angle);\n syncControls();\n schedule();\n });\n }\n\n // Cloth size: pixels and physical length stay in step through the ppi.\n $(\"width\").addEventListener(\"input\", (e) => {\n state.width = clampInt(e.target.value, 1, 20000, state.width);\n syncControls();\n schedule();\n });\n $(\"height\").addEventListener(\"input\", (e) => {\n state.height = clampInt(e.target.value, 1, 20000, state.height);\n syncControls();\n schedule();\n });\n $(\"ppi\").addEventListener(\"input\", (e) => {\n state.ppi = clampInt(e.target.value, 1, 2400, state.ppi);\n syncControls();\n schedule();\n });\n $(\"widthUnit\").addEventListener(\"input\", (e) => {\n const n = Number(e.target.value);\n if (!isFinite(n) || n <= 0) return;\n state.width = clampInt(unitToPx(n, state.ppi, state.unit), 1, 20000, state.width);\n $(\"width\").value = state.width;\n schedule();\n });\n $(\"heightUnit\").addEventListener(\"input\", (e) => {\n const n = Number(e.target.value);\n if (!isFinite(n) || n <= 0) return;\n state.height = clampInt(unitToPx(n, state.ppi, state.unit), 1, 20000, state.height);\n $(\"height\").value = state.height;\n schedule();\n });\n\n for (const b of document.querySelectorAll(\"#sizeQuick .tiny\")) {\n b.addEventListener(\"click\", () => {\n const [w, h, p] = b.dataset.size.split(\",\").map(Number);\n state.width = w;\n state.height = h;\n state.ppi = p;\n syncControls();\n schedule();\n });\n }\n\n for (const b of document.querySelectorAll(\"[data-unit]\")) {\n b.addEventListener(\"click\", () => {\n state.unit = b.dataset.unit;\n syncControls();\n schedule();\n });\n }\n for (const b of document.querySelectorAll(\"[data-backdrop]\")) {\n b.addEventListener(\"click\", () => {\n state.backdrop = b.dataset.backdrop;\n syncControls();\n schedule();\n });\n }\n for (const b of document.querySelectorAll(\"[data-zoom]\")) {\n b.addEventListener(\"click\", () => {\n zoom = b.dataset.zoom;\n swatchScroll.scrollTo(0, 0);\n syncControls();\n schedule();\n });\n }\n\n $(\"matteColor\").addEventListener(\"input\", (e) => (state.matte = e.target.value));\n $(\"quality\").addEventListener(\"input\", (e) => ($(\"qualityOut\").textContent = e.target.value));\n\n $(\"randomBolt\").addEventListener(\"click\", pullBolt);\n\n swatchScroll.addEventListener(\"scroll\", () => schedule(), { passive: true });\n\n let resizeTimer;\n window.addEventListener(\"resize\", () => {\n clearTimeout(resizeTimer);\n resizeTimer = setTimeout(schedule, 80);\n });\n\n // The first paint can land before fonts and flex have settled, which would\n // leave the cloth scaled to a stale box.\n if (window.ResizeObserver) {\n new ResizeObserver(() => schedule()).observe(swatchScroll);\n }\n if (document.fonts && document.fonts.ready) document.fonts.ready.then(schedule);\n\n document.addEventListener(\"keydown\", (e) => {\n if (e.metaKey || e.ctrlKey || e.altKey) return;\n const t = e.target;\n if (t && (t.tagName === \"INPUT\" || t.tagName === \"TEXTAREA\")) return;\n if (e.key === \"r\" || e.key === \"R\") {\n e.preventDefault();\n pullBolt();\n }\n });\n\n wireExport();\n}\n\nfunction slider(id, apply) {\n $(id).addEventListener(\"input\", (e) => {\n apply(Number(e.target.value));\n syncControls();\n schedule();\n });\n}\n\nfunction pullBolt() {\n const keep = { width: state.width, height: state.height, ppi: state.ppi, unit: state.unit, matte: state.matte, backdrop: state.backdrop };\n state = { ...randomBolt(defaults()), ...keep };\n syncControls();\n schedule();\n toast(\"Bolt № \" + boltNumber(state));\n}\n\n/* --------------------------------------------------------------- export */\n\nconst MIME = {\n png: \"image/png\",\n jpeg: \"image/jpeg\",\n webp: \"image/webp\",\n avif: \"image/avif\",\n};\n\nfunction baseName() {\n return `gingham-${state.style}-${state.width}x${state.height}-${state.ppi}ppi`;\n}\n\nfunction download(blob, filename) {\n const url = URL.createObjectURL(blob);\n const a = document.createElement(\"a\");\n a.href = url;\n a.download = filename;\n document.body.appendChild(a);\n a.click();\n a.remove();\n setTimeout(() => URL.revokeObjectURL(url), 4000);\n}\n\nasync function exportFormat(fmt) {\n const cfg = engineCfg(state);\n if (fmt === \"svg\") {\n const svg = toSVG(cfg, state.width, state.height, { tile, title: `Gingham № ${boltNumber(state)}` });\n download(new Blob([svg], { type: \"image/svg+xml\" }), baseName() + \".svg\");\n toast(`SVG cut — ${(svg.length / 1024).toFixed(1)} KB, ${tile.rects.length} shapes per repeat`);\n return;\n }\n\n const mime = MIME[fmt];\n const opaque = fmt === \"jpeg\";\n toast(\"Weaving \" + fmt.toUpperCase() + \"…\");\n await new Promise((r) => setTimeout(r, 16));\n\n let canvas;\n try {\n canvas = rasterCanvas(cfg, state.width, state.height, { tile, matte: opaque ? state.matte : null });\n } catch (err) {\n toast(\"That canvas is too large for this browser. Try fewer pixels.\");\n return;\n }\n const blob = await canvasToBlob(canvas, mime, Number($(\"quality\").value) / 100);\n if (!blob) {\n toast(\"This browser could not encode \" + fmt.toUpperCase() + \".\");\n return;\n }\n download(blob, `${baseName()}.${fmt === \"jpeg\" ? \"jpg\" : fmt}`);\n toast(`${fmt.toUpperCase()} cut — ${(blob.size / 1024).toFixed(0)} KB`);\n}\n\nasync function copyText(text, note) {\n try {\n await navigator.clipboard.writeText(text);\n toast(note);\n } catch {\n toast(\"Clipboard blocked by the browser.\");\n }\n}\n\nasync function runAction(act) {\n const cfg = engineCfg(state);\n if (act === \"tile-svg\") {\n download(new Blob([tileSVG(cfg, { tile })], { type: \"image/svg+xml\" }), `${baseName()}-tile.svg`);\n toast(`Seamless tile — ${tile.w}×${tile.h} px`);\n } else if (act === \"tile-png\") {\n const c = rasterCanvas(cfg, tile.w, tile.h, { tile });\n const blob = await canvasToBlob(c, \"image/png\");\n download(blob, `${baseName()}-tile.png`);\n toast(`Seamless tile — ${tile.w}×${tile.h} px`);\n } else if (act === \"css\") {\n copyText(toCSS(cfg, { tile }), \"CSS rule copied\");\n } else if (act === \"clipboard\") {\n try {\n const c = rasterCanvas(cfg, state.width, state.height, { tile });\n const blob = await canvasToBlob(c, \"image/png\");\n await navigator.clipboard.write([new ClipboardItem({ \"image/png\": blob })]);\n toast(\"PNG copied to the clipboard\");\n } catch {\n toast(\"This browser will not accept an image on the clipboard.\");\n }\n } else if (act === \"link\") {\n const url = location.origin + location.pathname + \"#\" + encodeConfig(state);\n copyText(url, \"Link copied — the pattern travels in the URL\");\n }\n}\n\nfunction wireExport() {\n for (const b of document.querySelectorAll(\"[data-fmt]\")) {\n b.addEventListener(\"click\", () => exportFormat(b.dataset.fmt));\n }\n for (const b of document.querySelectorAll(\"[data-act]\")) {\n b.addEventListener(\"click\", () => runAction(b.dataset.act));\n }\n 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