Ku6epXBOCTuK/easy-png-tools2
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refactor: use derived by instead of effect

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Ku6epXBOCTuK
2026-10-09 21:23:41 +05:00
parent 6dcbb7c0f8
commit 9916955b96
2 changed files with 25 additions and 31 deletions
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web/src/lib/components/schema/SchemaToolView.svelte
+21 -27
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@@ -138,7 +138,27 @@
// Mask preview per step (keyed by step.key): the toggle lives on every
// step result tile, not just the final one.
const maskOnKeys = new SvelteSet<string>();
let maskResults = $state<Record<string, PixelImage | null>>({});
// Mask preview: recomputed on the main thread per toggled step from that
// step's input; a mask never enters the chain itself.
const maskResults = $derived.by(() => {
const next: Record<string, PixelImage | null> = {};
steps.forEach((step, i) => {
if (!maskOnKeys.has(step.key)) return;
const stepTool = getTool(step.id);
if (!stepTool?.runMask) return;
const input = i === 0 ? source : stepResults[i - 1];
if (!input) return;
try {
next[step.key] = stepTool.runMask({
params: step.params,
source: input,
});
} catch {
next[step.key] = null;
}
});
return next;
});
let dragFrom = $state<number | null>(null);
const lastTool = $derived(
@@ -255,7 +275,6 @@
verdictVars = undefined;
displayError = null;
maskOnKeys.clear();
maskResults = {};
}
function setStepValue(
@@ -582,31 +601,6 @@
return () => debouncedRun.cancel();
});
// Mask preview: recomputed on the main thread per toggled step from that
// step's input; a mask never enters the chain itself.
$effect(() => {
void steps;
void stepResults;
void source;
const next: Record<string, PixelImage | null> = {};
steps.forEach((step, i) => {
if (!maskOnKeys.has(step.key)) return;
const stepTool = getTool(step.id);
if (!stepTool?.runMask) return;
const input = i === 0 ? source : stepResults[i - 1];
if (!input) return;
try {
next[step.key] = stepTool.runMask({
params: step.params,
source: input,
});
} catch {
next[step.key] = null;
}
});
maskResults = next;
});
function toggleStepMask(key: string) {
if (maskOnKeys.has(key)) maskOnKeys.delete(key);
else maskOnKeys.add(key);