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<script setup lang="ts">
import type { ContentPart } from "../../types/chat";
interface ToolInfo {
slug: string;
name: string;
type: string;
description: string;
}
interface UploadedImage {
url: string;
mimeType: string;
name: string;
}
const props = defineProps<{
isLoading: boolean;
disabled?: boolean;
disabledReason?: "approval" | "rate-limit" | null;
placeholder?: string;
enableTools: boolean;
toolsDisabled?: boolean;
loggedIn: boolean;
editing?: boolean;
agentTools?: ToolInfo[];
supportsVision?: boolean;
maxImages?: number;
}>();
const emit = defineEmits<{
send: [parts: ContentPart[]];
stop: [];
"update:enableTools": [val: boolean];
cancelEdit: [];
}>();
const inputText = ref("");
const textareaRef = ref<HTMLTextAreaElement | null>(null);
const fileInputRef = ref<HTMLInputElement | null>(null);
const fetchedTools = ref<ToolInfo[]>([]);
const images = ref<UploadedImage[]>([]);
const isDragging = ref(false);
const isUploading = ref(false);
const maxImages = computed(() => props.maxImages ?? 4);
const hasAgentTools = computed(() => !!(props.agentTools && props.agentTools.length > 0));
const availableTools = computed<ToolInfo[]>(() => {
if (hasAgentTools.value) {
return props.agentTools!;
}
return fetchedTools.value;
});
const canAddImage = computed(() => props.supportsVision && images.value.length < maxImages.value);
const effectivePlaceholder = computed(() => {
if (props.disabled) {
if (props.disabledReason === "rate-limit") return "已达发送频率限制,请稍后再试…";
return "请先处理待审批的工具调用…";
}
return props.placeholder || "输入消息…(Enter 发送,Shift+Enter 换行)";
});
async function loadTools() {
if (hasAgentTools.value) return;
try {
const res = await $fetch<{ code: number; data: ToolInfo[] }>("/api/llm/chat/tools");
fetchedTools.value = res.data ?? [];
} catch {
fetchedTools.value = [];
}
}
watch(
() => props.enableTools,
(val) => {
if (val && availableTools.value.length === 0) {
loadTools();
}
},
);
onMounted(() => {
if (props.enableTools) {
loadTools();
}
});
function autoResize() {
if (!textareaRef.value) return;
textareaRef.value.style.height = "auto";
const h = Math.min(textareaRef.value.scrollHeight, 200);
textareaRef.value.style.height = h + "px";
}
watch(inputText, () => {
nextTick(autoResize);
});
async function uploadImages(files: File[]) {
if (!props.supportsVision) return;
const remaining = maxImages.value - images.value.length;
const toUpload = files.slice(0, remaining);
if (toUpload.length === 0) return;
isUploading.value = true;
const { $toast } = useNuxtApp();
try {
const formData = new FormData();
for (const f of toUpload) {
formData.append("file", f);
}
const res = await $fetch<{ code: number; data: { name: string; url: string; mimeType: string; size: number }[] }>(
"/api/file/upload",
{ method: "POST", body: formData },
);
if (res.code === 0 && res.data) {
for (const item of res.data) {
images.value.push({ url: item.url, mimeType: item.mimeType, name: item.name });
}
}
} catch {
$toast?.error?.("图片上传失败");
} finally {
isUploading.value = false;
}
}
function removeImage(idx: number) {
images.value.splice(idx, 1);
}
function handleFileSelect(e: Event) {
const target = e.target as HTMLInputElement;
if (!target.files) return;
const files = Array.from(target.files).filter((f) => f.type.startsWith("image/"));
uploadImages(files);
target.value = "";
}
function handlePaste(e: ClipboardEvent) {
if (!props.supportsVision) return;
const items = e.clipboardData?.items;
if (!items) return;
const imageFiles: File[] = [];
for (const item of items) {
if (item.type.startsWith("image/")) {
const file = item.getAsFile();
if (file) imageFiles.push(file);
}
}
if (imageFiles.length > 0) {
e.preventDefault();
uploadImages(imageFiles);
}
}
function handleDrop(e: DragEvent) {
e.preventDefault();
isDragging.value = false;
if (!props.supportsVision) return;
const files = Array.from(e.dataTransfer?.files ?? []).filter((f) => f.type.startsWith("image/"));
if (files.length > 0) {
uploadImages(files);
}
}
function handleDragOver(e: DragEvent) {
e.preventDefault();
if (props.supportsVision) {
isDragging.value = true;
}
}
function handleDragLeave(e: DragEvent) {
e.preventDefault();
isDragging.value = false;
}
function handleSend() {
const text = inputText.value.trim();
const hasImages = images.value.length > 0;
if ((!text && !hasImages) || props.isLoading || props.disabled) return;
const parts: ContentPart[] = [];
if (text) {
parts.push({ type: "text", text });
}
for (const img of images.value) {
parts.push({ type: "image", image: img.url, mimeType: img.mimeType, name: img.name });
}
emit("send", parts);
inputText.value = "";
images.value = [];
nextTick(autoResize);
}
function handleKeydown(e: KeyboardEvent) {
if (e.key === "Escape" && props.editing) {
e.preventDefault();
emit("cancelEdit");
return;
}
if (e.key === "Enter" && !e.shiftKey) {
e.preventDefault();
handleSend();
}
}
defineExpose({
setText(text: string) {
inputText.value = text;
nextTick(() => {
autoResize();
textareaRef.value?.focus();
});
},
setParts(parts: ContentPart[]) {
inputText.value = parts.filter((p) => p.type === "text").map((p) => (p as any).text).join("");
images.value = parts
.filter((p) => p.type === "image")
.map((p) => ({ url: (p as any).image, mimeType: (p as any).mimeType, name: (p as any).name ?? "image" }));
nextTick(() => {
autoResize();
textareaRef.value?.focus();
});
},
focus() {
textareaRef.value?.focus();
},
});
</script>
<template>
<div class="agent-input">
<!-- Editing banner -->
<div v-if="editing" class="edit-banner">
<div class="edit-banner-info">
<Icon name="lucide:pencil-line" class="edit-banner-icon" />
<span>正在编辑消息</span>
</div>
<button class="edit-banner-cancel" @click="emit('cancelEdit')">
<Icon name="lucide:x" />
取消
</button>
</div>
<!-- Tools bar above input (hidden when model doesn't support tools or agent has no tools) -->
<div v-if="!toolsDisabled && hasAgentTools" class="tools-bar">
<button
class="toggle-btn"
:class="{ active: enableTools, disabled: toolsDisabled }"
:disabled="toolsDisabled"
:title="toolsDisabled ? '当前模型不支持工具调用' : '工具调用'"
@click="!toolsDisabled && emit('update:enableTools', !enableTools)"
>
<Icon name="lucide:wrench" />
<span>工具</span>
</button>
<div v-if="enableTools && availableTools.length > 0" class="tools-list">
<span
v-for="t in availableTools"
:key="t.slug"
class="tool-chip"
:title="t.description"
>
{{ t.name }}
</span>
</div>
</div>
<!-- Image preview area -->
<div v-if="images.length > 0" class="image-preview-area">
<div v-for="(img, idx) in images" :key="idx" class="image-preview-item">
<img :src="img.url" :alt="img.name" class="image-preview-img" />
<button class="image-remove-btn" @click="removeImage(idx)">
<Icon name="lucide:x" />
</button>
</div>
</div>
<div
class="input-wrapper"
:class="{ 'is-dragging': isDragging }"
@drop="handleDrop"
@dragover="handleDragOver"
@dragleave="handleDragLeave"
>
<!-- Image upload button -->
<button
v-if="supportsVision"
class="btn-image"
:class="{ disabled: !canAddImage }"
:disabled="!canAddImage || isUploading"
:title="!supportsVision ? '当前模型不支持图片' : canAddImage ? '上传图片(可粘贴/拖拽)' : `最多 ${maxImages} 张图片`"
@click="fileInputRef?.click()"
>
<Icon :name="isUploading ? 'lucide:loader-2' : 'lucide:image-plus'" />
</button>
<input
ref="fileInputRef"
type="file"
accept="image/png,image/jpeg,image/webp,image/svg+xml"
multiple
class="file-input-hidden"
@change="handleFileSelect"
/>
<textarea
ref="textareaRef"
v-model="inputText"
class="agent-textarea"
:placeholder="effectivePlaceholder"
:disabled="disabled"
rows="1"
@keydown="handleKeydown"
@paste="handlePaste"
/>
<div class="input-actions">
<button
v-if="isLoading"
class="btn-stop"
@click="emit('stop')"
>
<Icon name="lucide:square" />
停止
</button>
<button
v-else
class="btn-send"
:disabled="(!inputText.trim() && images.length === 0) || disabled"
@click="handleSend"
>
<Icon name="lucide:arrow-up" />
</button>
</div>
</div>
<!-- Drag overlay hint -->
<div v-if="isDragging" class="drag-hint">
<Icon name="lucide:image-plus" />
<span>松开以上传图片</span>
</div>
</div>
</template>
<style scoped>
.agent-input {
padding: 0 24px 20px;
max-width: 800px;
margin: 0 auto;
width: 100%;
}
.edit-banner {
display: flex;
align-items: center;
justify-content: space-between;
padding: 6px 14px;
margin-bottom: 8px;
background: var(--color-surface-soft);
border: 1px solid var(--color-hairline);
border-radius: 12px;
font-size: 13px;
color: var(--color-muted);
}
.edit-banner-info {
display: flex;
align-items: center;
gap: 6px;
}
.edit-banner-icon {
font-size: 14px;
color: var(--color-primary);
}
.edit-banner-cancel {
display: flex;
align-items: center;
gap: 4px;
padding: 2px 10px;
background: none;
border: 1px solid var(--color-hairline);
border-radius: 8px;
font-size: 12px;
color: var(--color-muted);
cursor: pointer;
transition: all 0.15s;
}
.edit-banner-cancel:hover {
border-color: var(--color-primary);
color: var(--color-primary);
}
.tools-bar {
display: flex;
align-items: center;
gap: 8px;
margin-bottom: 8px;
flex-wrap: wrap;
}
.toggle-btn {
display: flex;
align-items: center;
gap: 4px;
padding: 4px 10px;
background: var(--color-surface-soft);
border: 1px solid var(--color-hairline);
border-radius: 8px;
font-size: 12px;
color: var(--color-muted);
cursor: pointer;
transition: all 0.15s;
}
.toggle-btn:hover {
border-color: var(--color-primary);
}
.toggle-btn.active {
background: var(--color-primary);
border-color: var(--color-primary);
color: var(--color-on-primary);
}
.toggle-btn.disabled {
opacity: 0.4;
cursor: not-allowed;
}
.toggle-btn.disabled:hover {
border-color: var(--color-hairline);
}
.tools-list {
display: flex;
align-items: center;
gap: 4px;
flex-wrap: wrap;
}
.tool-chip {
display: inline-flex;
align-items: center;
padding: 2px 8px;
background: var(--color-surface-soft);
border: 1px solid var(--color-hairline);
border-radius: 6px;
font-size: 11px;
color: var(--color-muted);
cursor: default;
}
.image-preview-area {
display: flex;
gap: 8px;
margin-bottom: 8px;
flex-wrap: wrap;
}
.image-preview-item {
position: relative;
width: 64px;
height: 64px;
border-radius: 8px;
overflow: hidden;
border: 1px solid var(--color-hairline);
}
.image-preview-img {
width: 100%;
height: 100%;
object-fit: cover;
}
.image-remove-btn {
position: absolute;
top: 2px;
right: 2px;
width: 18px;
height: 18px;
display: flex;
align-items: center;
justify-content: center;
border: none;
border-radius: 50%;
background: rgba(0, 0, 0, 0.6);
color: #fff;
cursor: pointer;
font-size: 12px;
padding: 0;
}
.image-remove-btn:hover {
background: rgba(0, 0, 0, 0.8);
}
.input-wrapper {
display: flex;
align-items: flex-end;
gap: 8px;
background: var(--color-surface-card);
border: 1px solid var(--color-hairline);
border-radius: 24px;
padding: 8px 8px 8px 12px;
transition: border-color 0.15s, box-shadow 0.15s;
}
.input-wrapper:focus-within {
border-color: var(--color-primary);
box-shadow: 0 0 0 3px rgba(204, 120, 92, 0.12);
}
.input-wrapper.is-dragging {
border-color: var(--color-primary);
border-style: dashed;
background: var(--color-surface-soft);
}
.file-input-hidden {
display: none;
}
.btn-image {
flex-shrink: 0;
display: flex;
align-items: center;
justify-content: center;
width: 32px;
height: 32px;
border: none;
border-radius: 50%;
background: none;
color: var(--color-muted);
cursor: pointer;
font-size: 18px;
transition: all 0.15s;
margin-bottom: 2px;
}
.btn-image:hover:not(:disabled) {
color: var(--color-primary);
background: var(--color-surface-soft);
}
.btn-image.disabled {
opacity: 0.3;
cursor: not-allowed;
}
.agent-textarea {
flex: 1;
border: none;
background: none;
outline: none;
resize: none;
font-family: var(--font-body);
font-size: 15px;
line-height: 1.6;
color: var(--color-ink);
max-height: 200px;
padding: 6px 0;
}
.agent-textarea::placeholder {
color: var(--color-muted);
}
.agent-textarea:disabled {
opacity: 0.5;
cursor: not-allowed;
}
.input-actions {
flex-shrink: 0;
display: flex;
align-items: center;
}
.btn-send,
.btn-stop {
display: flex;
align-items: center;
justify-content: center;
border: none;
border-radius: 50%;
cursor: pointer;
font-size: 18px;
transition: all 0.15s;
}
.btn-send {
width: 36px;
height: 36px;
background: var(--color-primary);
color: var(--color-on-primary);
}
.btn-send:hover:not(:disabled) {
background: var(--color-primary-active);
}
.btn-send:disabled {
background: var(--color-hairline);
color: var(--color-muted);
cursor: not-allowed;
}
.btn-stop {
height: 36px;
background: var(--color-surface-dark);
color: var(--color-on-dark);
font-size: 13px;
border-radius: 18px;
padding: 0 14px;
gap: 5px;
white-space: nowrap;
}
.btn-stop:hover {
filter: brightness(1.2);
}
.drag-hint {
display: flex;
align-items: center;
justify-content: center;
gap: 6px;
padding: 8px;
margin-top: 4px;
font-size: 13px;
color: var(--color-primary);
}
</style>