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<script lang="ts">
import { computeContextUsage, formatCompactTokens } from "../../../core/metrics";
const FALLBACK_CONTEXT_WINDOW = 1_000_000;
const MAX_LINES = 7;
let {
onSend,
onQueue,
onStop,
contextSize = undefined,
contextWindow = undefined,
status = "idle",
}: {
onSend: (text: string) => void;
/**
* Enqueue a steering message (`chat.queue`). When provided AND the status
* is `running`, the send button becomes a "Queue" button that steers the
* in-flight turn instead of starting a new one. When absent, `onSend` is
* used regardless (tests / non-steering contexts).
*/
onQueue?: (text: string) => void;
/** Stop the in-flight generation (`POST /conversations/:id/stop`). */
onStop?: () => void;
// Current context occupancy (latest turn's contextSize), or `undefined`
// when unknown — the status bar then shows "— tokens", never 0%.
contextSize?: number | undefined;
/** Per-model context window (max tokens) from `GET /models` modelInfo. */
contextWindow?: number | undefined;
// Coarse agent status for the status-bar icon.
status?: "idle" | "running" | "error";
} = $props();
let text = $state("");
let inputEl: HTMLTextAreaElement | undefined;
const hasText = $derived(text.trim().length > 0);
const effectiveMax = $derived(contextWindow ?? FALLBACK_CONTEXT_WINDOW);
const usage = $derived(computeContextUsage(contextSize, effectiveMax));
const hasUsage = $derived(contextSize !== undefined);
// One button, three modes:
// - idle → "Send" (starts a turn via chat.send)
// - running + text → "Queue" (steers via chat.queue)
// - running + empty → "Stop" (aborts via POST /stop)
const buttonMode = $derived.by<"send" | "queue" | "stop">(() => {
if (status === "running" && !hasText && onStop !== undefined) return "stop";
if (status === "running" && hasText && onQueue !== undefined) return "queue";
return "send";
});
const placeholder = $derived(status === "running" ? "Steer the conversation..." : "Type a message...");
// As the window fills, escalate color: calm → warning → danger.
function fillClass(pct: number): string {
if (pct >= 90) return "progress-error";
if (pct >= 70) return "progress-warning";
return "progress-success";
}
function resize(): void {
const el = inputEl;
if (!el) return;
el.style.height = "auto";
const style = getComputedStyle(el);
const lineHeight = Number.parseFloat(style.lineHeight) || 20;
const paddingY =
Number.parseFloat(style.paddingTop) + Number.parseFloat(style.paddingBottom);
const borderY =
Number.parseFloat(style.borderTopWidth) + Number.parseFloat(style.borderBottomWidth);
const maxHeight = lineHeight * MAX_LINES + paddingY + borderY;
const next = Math.min(el.scrollHeight, maxHeight);
el.style.height = `${next}px`;
el.style.overflowY = el.scrollHeight > maxHeight ? "auto" : "hidden";
}
// Re-run resize whenever the value changes (covers programmatic clears too).
$effect(() => {
void text;
resize();
});
function handleSubmit(): void {
const trimmed = text.trim();
if (trimmed.length === 0) return;
if (buttonMode === "queue") {
onQueue?.(trimmed);
} else {
onSend(trimmed);
}
text = "";
}
function handleKeydown(e: KeyboardEvent): void {
if (e.key === "Enter" && !e.shiftKey) {
e.preventDefault();
handleSubmit();
}
}
</script>
<form
class="flex flex-col"
onsubmit={(e) => {
e.preventDefault();
handleSubmit();
}}
>
<!-- Top bar: expanding textarea + single context-aware button -->
<div class="flex items-end gap-2 px-4 pt-3 pb-2">
<textarea
bind:this={inputEl}
class="textarea textarea-bordered flex-1 resize-none leading-normal !min-h-0 h-auto"
bind:value={text}
onkeydown={handleKeydown}
placeholder={placeholder}
rows="1"
aria-label="Message input"
></textarea>
{#if buttonMode === "stop"}
<button
class="btn btn-error w-20 shrink-0"
type="button"
aria-label="Stop generation"
onclick={() => onStop?.()}
>
Stop
</button>
{:else}
<button class="btn btn-primary w-20 shrink-0" type="submit" disabled={!hasText}>
{buttonMode === "queue" ? "Queue" : "Send"}
</button>
{/if}
</div>
<!-- Bottom status bar: status icon · context-window fill · token count -->
<div class="flex items-center gap-2 px-4 pb-2 text-xs text-base-content/50">
<span class="shrink-0">
{#if status === "running"}
<span class="loading loading-spinner loading-xs text-primary"></span>
{:else if status === "error"}
<svg
xmlns="http://www.w3.org/2000/svg"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
class="h-4 w-4 text-error"
aria-label="Error"
>
<circle cx="12" cy="12" r="10"></circle>
<line x1="12" y1="8" x2="12" y2="12"></line>
<line x1="12" y1="16" x2="12.01" y2="16"></line>
</svg>
{:else}
<svg
xmlns="http://www.w3.org/2000/svg"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2.5"
stroke-linecap="round"
stroke-linejoin="round"
class="h-4 w-4 text-success"
aria-label="Idle"
>
<polyline points="20 6 9 17 4 12"></polyline>
</svg>
{/if}
</span>
{#if usage.percent !== null}
<progress
class="progress h-2 flex-1 {fillClass(usage.percent)}"
value={usage.percent}
max="100"
></progress>
{:else}
<progress class="progress h-2 flex-1 opacity-40" value="0" max="100"></progress>
{/if}
<span class="shrink-0 whitespace-nowrap font-mono">
{#if hasUsage}
{formatCompactTokens(usage.current)}{#if usage.max !== null}<span
class="text-base-content/40"
>
/ {formatCompactTokens(usage.max)}</span
>{/if}
{#if usage.percent !== null}
<span class="ml-1">· {usage.percent.toFixed(1)}%</span>
{/if}
{:else}
<span class="text-base-content/40">— tokens</span>
{/if}
</span>
</div>
</form>
|
