webui/src/components/DialogHost.svelte

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<script>
  import { activeDialog, closeDialog } from "../lib/dialogs.js";

  let confirmButton = $state(null);

  // Move focus into the dialog as soon as it appears.
  $effect(() => {
    if ($activeDialog && confirmButton) confirmButton.focus();
  });

  function onKeydown(event) {
    if (!$activeDialog) return;
    if (event.key === "Escape") {
      event.preventDefault();
      closeDialog(false);
    }
  }
</script>

<svelte:window onkeydown={onKeydown} />

{#if $activeDialog}
  <div
    class="backdrop"
    role="presentation"
    onclick={(e) => e.target === e.currentTarget && closeDialog(false)}
  >
    <div
      class="dialog"
      role="alertdialog"
      aria-modal="true"
      aria-labelledby="dialog-title"
      aria-describedby="dialog-body"
    >
      <h2 id="dialog-title">{$activeDialog.title}</h2>
      <p id="dialog-body">{$activeDialog.body}</p>
      <div class="actions">
        {#if $activeDialog.kind === "confirm"}
          <button class="btn" type="button" onclick={() => closeDialog(false)}>
            {$activeDialog.cancelLabel}
          </button>
        {/if}
        <button
          class="btn btn-primary"
          class:danger={$activeDialog.danger}
          type="button"
          bind:this={confirmButton}
          onclick={() => closeDialog(true)}
        >
          {$activeDialog.confirmLabel}
        </button>
      </div>
    </div>
  </div>
{/if}

<style>
  .backdrop {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgb(12 15 20 / 55%);
    backdrop-filter: blur(2px);
    animation: fade 0.12s ease-out;
  }

  .dialog {
    width: min(460px, 100%);
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
    box-shadow: var(--shadow-lg);
    animation: pop 0.14s ease-out;
  }

  .dialog h2 {
    margin: 0 0 8px;
    font-size: 1.08rem;
  }

  .dialog p {
    margin: 0 0 20px;
    color: var(--text-muted);
    line-height: 1.55;
  }

  .actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
  }

  .btn-primary.danger {
    background: var(--danger);
  }

  .btn-primary.danger:hover {
    background: color-mix(in srgb, var(--danger) 85%, black);
  }

  @keyframes fade {
    from {
      opacity: 0;
    }
  }

  @keyframes pop {
    from {
      opacity: 0;
      transform: translateY(8px) scale(0.98);
    }
  }
</style>