digital-garbage
835fab7864
One declaration does three jobs: renders the panel, carries the defaults, names
the values that come back. A module writes no DOM and reads no DOM.
Validation refuses rather than repairs -- unknown type, a renderer its type does
not have, a label that is not text, a default outside its own bounds, a when
naming a key the module never declared. A module that is wrong does not get a
best-effort panel; it does not load, and says why once.
Ordering is by declared relation and stage, never priority numbers, and a cycle
drops only the modules in it. Compatibility is by trait, never model name.
The shell hands a module { composer, values, on, shell } and nothing else: no
node, no document, no kit internals. It cannot style anything because it is
never given anything that could.
catalogue/hide.html puts one good module and five broken ones through the real
shell and shows the result: one panel, five absent, no placeholders. The lint
fixtures make the scanner prove it catches each rule, so a clean scan means
something.
First slice: modules/system/appearance. Two settings, an optional ui.js, and
clicking Light actually turns the app light.
25 lines
893 B
JavaScript
25 lines
893 B
JavaScript
// Mount points are ANNOUNCED by the regions that offer them.
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//
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// A fixed list in core would be a global list -- the one thing the architecture
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// avoids -- and it would have to be edited every time the shell grows a region.
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// Instead a region says what it can host, and a module naming something no
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// region offers is simply absent. That is "hide, don't warn" one level up.
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const regions = new Map(); // mount point -> host element
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export function offer(mount, host) {
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if (regions.has(mount)) {
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throw new Error(`Mount point "${mount}" is already offered by another region.`);
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}
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regions.set(mount, host);
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return () => regions.delete(mount);
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}
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export const hostFor = (mount) => regions.get(mount) || null;
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export const offered = () => [...regions.keys()].sort();
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export const claimed = (mount) => regions.has(mount);
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export function _reset() {
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regions.clear();
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}
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