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// Pure app logic — the package-face model and the dropdown option list — with no
// DOM and no module globals (every dependency is a parameter). It is unit-tested
// directly (test-app-core.mjs) and inlined into the page like colormath.js, so
// the browser runs the same code the tests import. The app.js wrappers (pname,
// seedPkgmap, ddList, pkgEffFg, pkgEffBg) are thin delegators that pass the
// live PALETTE / APPS / PKGMAP into these.
// Resolve a palette name (or a raw #hex) to a hex; null when the name is unknown.
function nameToHex(n,palette){if(!n)return null;if(/^#/.test(n))return n;const p=palette.find(p=>p[1]===n);return p?p[0]:null;}
// Seed the package-face map from the app inventory's per-face defaults.
function buildPkgmap(apps,palette){const m={};for(const app in apps){m[app]={};for(const row of apps[app].faces){const face=row[0],d=row[2]||{};m[app][face]={fg:nameToHex(d.fg,palette),bg:nameToHex(d.bg,palette),bold:!!d.bold,italic:!!d.italic,underline:!!d.underline,strike:!!d.strike,inherit:d.inherit||null,height:d.height||1,box:d.box||null,source:'default'};}}return m;}
// The package faces worth exporting (anything seeded or user-touched), trimmed.
function packagesForExport(map){const out={};for(const app in map){const faces={};for(const face in map[app]){const f=map[app][face];if(f.source==='default'||f.source==='user'||f.source==='cleared'){const o={fg:f.fg,bg:f.bg,bold:f.bold,italic:f.italic,underline:!!f.underline,strike:!!f.strike,inherit:f.inherit,source:f.source};if(f.height&&f.height!==1)o.height=f.height;if(f.box)o.box=f.box;faces[face]=o;}}if(Object.keys(faces).length)out[app]=faces;}return out;}
// Merge an imported package block into a face map, filling missing fields.
function mergePackagesInto(map,pkgs){if(!pkgs)return;for(const app in pkgs){if(!map[app])map[app]={};for(const face in pkgs[app]){const f=pkgs[app][face]||{};map[app][face]={fg:f.fg??null,bg:f.bg??null,bold:!!f.bold,italic:!!f.italic,underline:!!f.underline,strike:!!f.strike,inherit:f.inherit??null,height:f.height||1,box:f.box??null,source:f.source||'user'};}}}
// Effective fg/bg for a package face, following its inherit chain. seen guards
// against an inherit cycle (returns null rather than recursing forever).
function effResolve(map,app,face,attr,seen){seen=seen||{};const f=map[app]&&map[app][face];if(!f||seen[face])return null;seen[face]=1;if(f[attr])return f[attr];if(f.inherit&&map[app][f.inherit])return effResolve(map,app,f.inherit,attr,seen);return null;}
// Standard swatch-dropdown option list: a default entry, then the palette. When
// cur is set but no longer in the palette, surface it as a "(gone)" entry first.
function optList(cur,palette){const have=cur===''||palette.some(p=>p[0]===cur);return [['','— default —'],...(have?palette:[[cur,'(gone) '+cur],...palette])];}
// Turn a theme name into a safe filename slug: collapse runs of disallowed
// characters to a single dash, trim leading/trailing dashes, fall back to 'theme'.
function slugify(name){return name.replace(/[^A-Za-z0-9._-]+/g,'-').replace(/^-+|-+$/g,'')||'theme';}
export { nameToHex, buildPkgmap, packagesForExport, mergePackagesInto, effResolve, optList, slugify };
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