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import React, { useState, useRef, useEffect } from 'react';
import styled from 'styled-components';
const Wrapper = styled.div`
width: 100%;
max-width: 1000px;
margin: 10px auto;
`;
const Title = styled.h1`
font-size: 20px;
color: #333;
margin-bottom: 10px;
text-align: center;
`;
const Container = styled.div`
display: flex;
flex-direction: column;
width: 100%;
background-color: white;
border-radius: 10px;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
overflow: hidden;
margin: 10px auto;
@media (min-width: 768px) {
flex-direction: row;
height: 70vh;
}
`;
const InputText = styled.textarea`
width: 100%;
height: 200px;
font-size: 14px;
padding: 10px;
border: none;
border-bottom: 1px solid #e0e0e0;
box-sizing: border-box;
outline: none;
resize: none;
@media (min-width: 768px) {
width: 50%;
height: 100%;
border-bottom: none;
border-right: 1px solid #e0e0e0;
}
`;
const PreviewContainer = styled.div`
width: 100%;
display: flex;
flex-direction: column;
justify-content: space-between;
padding: 10px;
box-sizing: border-box;
@media (min-width: 768px) {
width: 50%;
height: 100%;
}
`;
const Preview = styled.div`
word-wrap: break-word;
white-space: pre-wrap;
max-width: 100%;
text-align: left;
overflow-y: auto;
flex-grow: 1;
padding-right: 10px;
font-size: 14px;
max-height: 200px;
@media (min-width: 768px) {
max-height: none;
}
h1, h2, h3 {
color: #2c3e50;
margin-top: 0;
}
&::-webkit-scrollbar {
width: 6px;
}
&::-webkit-scrollbar-track {
background: #f1f1f1;
}
&::-webkit-scrollbar-thumb {
background: #888;
border-radius: 3px;
}
&::-webkit-scrollbar-thumb:hover {
background: #555;
}
`;
const DownloadButton = styled.button`
padding: 8px 16px;
background-color: #3498db;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 14px;
transition: background-color 0.3s ease;
align-self: flex-end;
margin-top: 10px;
&:hover {
background-color: #2980b9;
}
`;
function TextToImage() {
const [text, setText] = useState('');
const previewRef = useRef(null);
const formatText = (text) => {
return text
.replace(/^### (.*$)/gim, '<h3>$1</h3>')
.replace(/^## (.*$)/gim, '<h2>$1</h2>')
.replace(/^# (.*$)/gim, '<h1>$1</h1>')
.replace(/\*\*(.*?)\*\*/g, '<strong>$1</strong>')
.replace(/\n/g, '<br/>');
};
const handleDownload = async () => {
const previewClone = previewRef.current.cloneNode(true);
document.body.appendChild(previewClone);
previewClone.style.position = 'absolute';
previewClone.style.left = '-9999px';
previewClone.style.width = 'auto';
previewClone.style.maxWidth = '800px';
previewClone.style.height = 'auto';
previewClone.style.whiteSpace = 'pre-wrap';
previewClone.style.backgroundColor = 'white';
previewClone.style.padding = '40px';
try {
const html2canvas = (await import('html2canvas')).default;
const canvas = await html2canvas(previewClone, {
backgroundColor: 'white',
scale: 2,
width: previewClone.offsetWidth,
height: previewClone.offsetHeight
});
const link = document.createElement('a');
link.download = 'text_image.png';
link.href = canvas.toDataURL('image/png');
link.click();
} catch (error) {
console.error('Failed to load html2canvas:', error);
} finally {
document.body.removeChild(previewClone);
}
};
return (
<Wrapper>
<Title>文字卡片生成器</Title>
<Container>
<InputText
placeholder="输入文本(可包含标题,如# 标题1)"
value={text}
onChange={(e) => setText(e.target.value)}
/>
<PreviewContainer>
<Preview
ref={previewRef}
dangerouslySetInnerHTML={{ __html: formatText(text) }}
/>
<DownloadButton onClick={handleDownload}>导出为图片</DownloadButton>
</PreviewContainer>
</Container>
</Wrapper>
);
}
export default TextToImage;