<script lang="ts" setup>
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import { computed, ref } from 'vue';
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import { BasicModal, useModalInner } from '@jnpf/ui/modal';
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import { Button, Space } from 'ant-design-vue';
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import CustomPrintPreviewPane from './CustomPrintPreviewPane.vue';
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import type { CustomPrintConfig, CustomPrintPreviewExpose } from './types';
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const emit = defineEmits(['register', 'print', 'downloadPdf']);
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interface State {
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template: string;
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type: CustomPrintConfig['type'];
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data: any;
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title: string;
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showPdfBtn: boolean;
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loading: boolean;
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error: null | string;
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}
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const state = ref<State>({
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template: '',
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type: 'html',
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data: {},
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title: '打印预览',
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showPdfBtn: true,
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loading: false,
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error: null,
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});
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const previewRef = ref<CustomPrintPreviewExpose | null>(null);
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const isPrinting = ref(false);
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const [registerModal, { closeModal }] = useModalInner(init);
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// 是否是 HTML 文件模式
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const isHtmlFileMode = computed(() => state.value.type === 'html-file');
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const canPrint = computed(() => !state.value.loading && !state.value.error && !isPrinting.value);
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const previewConfig = computed<CustomPrintConfig>(() => ({
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data: state.value.data,
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template: state.value.template,
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title: state.value.title,
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type: state.value.type,
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}));
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// 打印样式注入
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const printStyles = computed(() => {
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return `
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<style>
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@media print {
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@page {
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size: A4;
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margin: 0;
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}
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body {
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background: white !important;
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padding: 0 !important;
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margin: 0 !important;
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-webkit-print-color-adjust: exact;
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print-color-adjust: exact;
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}
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.custom-print-modal__content {
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padding: 0 !important;
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background: white !important;
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}
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.no-print {
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display: none !important;
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}
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.print-page {
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break-after: page;
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page-break-after: always;
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}
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.print-page:last-child {
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break-after: auto;
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page-break-after: auto;
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}
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}
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</style>
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`;
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});
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async function init(data: Partial<State>) {
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// 标题模板：使用传入的 title 填充，默认显示"打印预览"
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const titleValue = data.title || '';
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const finalTitle = titleValue ? `打印预览 - ${titleValue}` : '打印预览';
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state.value = {
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template: data.template || '',
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type: data.type || 'html',
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data: data.data || {},
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title: finalTitle,
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showPdfBtn: data.showPdfBtn !== false,
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loading: false,
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error: null,
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};
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}
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// 打印
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function handlePrint() {
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if (!canPrint.value) return;
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// 使用独立的 printing 状态，避免影响模板显示
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isPrinting.value = true;
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const originalTitle = document.title;
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document.title = state.value.title || '打印';
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// 监听打印对话框关闭事件
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const cleanup = () => {
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document.title = originalTitle;
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isPrinting.value = false;
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emit('print', state.value.data);
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window.removeEventListener('afterprint', cleanup);
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};
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window.addEventListener('afterprint', cleanup);
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// 使用延迟确保 UI 先更新再调用打印（window.print 会阻塞主线程）
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setTimeout(() => {
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// 如果是 iframe 模式，直接调用 iframe 的打印
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if (isHtmlFileMode.value) {
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printIframeContent();
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} else {
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window.print();
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}
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// 打印对话框关闭后清理（afterprint 事件不稳定，使用较短的备用延迟）
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setTimeout(cleanup, 500);
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}, 50);
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}
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// 打印 iframe 内容
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function printIframeContent() {
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previewRef.value?.print();
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}
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// 导出PDF（通过打印为PDF实现）
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function handleDownloadPdf() {
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if (!canPrint.value) return;
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// PDF 导出功能和打印相同，都是调用浏览器打印对话框
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handlePrint();
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emit('downloadPdf', state.value.data);
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}
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// 关闭弹窗
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function handleClose() {
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closeModal();
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}
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// 重新加载模板
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function reloadTemplate() {
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state.value.error = null;
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previewRef.value?.reload();
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}
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function handlePreviewError(message: string) {
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state.value.error = message;
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state.value.loading = false;
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}
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function handlePreviewLoaded() {
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state.value.error = null;
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state.value.loading = false;
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}
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function handlePreviewLoading(loading: boolean) {
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state.value.loading = loading;
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}
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</script>
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<template>
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<BasicModal
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v-bind="$attrs"
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:title="state.title"
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:default-fullscreen="true"
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:closable="false"
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:keyboard="true"
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:footer="null"
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class="custom-print-modal"
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@register="registerModal">
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<template #title>
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<div class="custom-print-modal__header">
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<span class="header-title">{{ state.title }}</span>
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<Space class="header-actions no-print" :size="10">
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<Button v-if="state.error" :loading="state.loading" @click="reloadTemplate"> 重新加载 </Button>
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<Button v-if="state.showPdfBtn" :disabled="!canPrint" :loading="isPrinting" @click="handleDownloadPdf">
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导出PDF
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</Button>
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<Button type="primary" :disabled="!canPrint" :loading="isPrinting" @click="handlePrint"> 打印 </Button>
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<Button @click="handleClose">关闭</Button>
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</Space>
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</div>
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</template>
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<div class="custom-print-modal__content">
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<CustomPrintPreviewPane
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ref="previewRef"
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:config="previewConfig"
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@error="handlePreviewError"
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@loaded="handlePreviewLoaded"
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@loading="handlePreviewLoading" />
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<!-- 注入打印样式 -->
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<div v-if="state.type === 'html'" v-html="printStyles"></div>
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</div>
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</BasicModal>
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</template>
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<style lang="scss" scoped>
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// 打印时隐藏弹窗的一些元素
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@media print {
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:deep(.ant-modal-header) {
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display: none !important;
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}
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:deep(.ant-modal-close) {
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display: none !important;
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}
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:deep(.ant-modal-body) {
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padding: 0 !important;
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}
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:deep(.scrollbar__view) {
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overflow: visible !important;
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}
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.custom-print-modal__content {
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padding: 0 !important;
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background: white !important;
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}
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// iframe 容器在打印时显示完整内容
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:deep(.iframe-container) {
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overflow: visible !important;
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}
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}
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.custom-print-modal {
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&__header {
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display: flex;
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align-items: center;
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justify-content: space-between;
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width: 100%;
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.header-title {
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font-size: 16px;
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font-weight: 500;
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}
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.header-actions {
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display: flex;
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gap: 8px;
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}
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}
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&__content {
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position: relative;
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height: 100%;
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padding: 20px;
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overflow: auto;
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background: #f0f0f0;
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:deep(.custom-print-preview-pane) {
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height: 100%;
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}
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}
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}
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</style>
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