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<script lang="ts">
import { tabStore } from "../tabs.svelte.js";
const MAX_LINES = 7;
let inputEl: HTMLTextAreaElement | undefined;
let inputValue = $state("");
const agentStatus = $derived(tabStore.activeTab?.agentStatus ?? "idle");
const tabId = $derived(tabStore.activeTab?.id ?? "");
$effect(() => {
inputEl?.focus();
});
function resize() {
const el = inputEl;
if (!el) return;
// Reset height so scrollHeight reflects the content's natural height.
el.style.height = "auto";
const style = getComputedStyle(el);
const lineHeight = Number.parseFloat(style.lineHeight) || 20;
const paddingY = Number.parseFloat(style.paddingTop) + Number.parseFloat(style.paddingBottom);
const borderY =
Number.parseFloat(style.borderTopWidth) + Number.parseFloat(style.borderBottomWidth);
const maxHeight = lineHeight * MAX_LINES + paddingY + borderY;
const next = Math.min(el.scrollHeight, maxHeight);
el.style.height = `${next}px`;
el.style.overflowY = el.scrollHeight > maxHeight ? "auto" : "hidden";
}
// Re-run resize whenever the value changes (covers programmatic clears too).
$effect(() => {
// Touch inputValue so this effect tracks it.
void inputValue;
resize();
});
function handleKeydown(e: KeyboardEvent) {
if (e.key === "Enter" && !e.shiftKey) {
e.preventDefault();
submit();
}
}
function submit() {
const text = inputValue.trim();
if (!text) return;
inputValue = "";
tabStore.sendMessage(text);
}
</script>
<div class="flex items-end gap-2 p-3">
{#if agentStatus === "running"}
<button
type="button"
class="btn btn-ghost gap-1 btn-sm lg:btn-xs"
onclick={() => tabStore.stopGeneration(tabId)}
title="Stop generation"
>
<span class="loading loading-spinner loading-sm text-primary" style="pointer-events: auto"></span>
<span class="text-xs">Stop</span>
</button>
{:else if agentStatus === "idle"}
<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="w-5 h-5 text-success shrink-0 mb-2">
<polyline points="20 6 9 17 4 12"></polyline>
</svg>
{:else if agentStatus === "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="w-5 h-5 text-error shrink-0 mb-2">
<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>
{/if}
<textarea
bind:this={inputEl}
bind:value={inputValue}
rows="1"
placeholder="Type a message..."
class="textarea textarea-ghost flex-1 resize-none leading-normal !min-h-0 h-auto"
onkeydown={handleKeydown}
oninput={resize}
></textarea>
<button
type="button"
class="btn btn-primary"
disabled={!inputValue.trim()}
onclick={submit}
>
Send
</button>
</div>
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