962 lines
31 KiB
JavaScript
962 lines
31 KiB
JavaScript
// 极简邀请函制作工具
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(function() {
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const fileInput = document.getElementById('fileInput');
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const addImageBtn = document.getElementById('addImageBtn');
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const saveBtn = document.getElementById('saveBtn');
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const imageContainer = document.getElementById('imageContainer');
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const bgLayer = document.getElementById('bgLayer');
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const bgImage = document.getElementById('bgImage');
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const emptyTip = document.getElementById('emptyTip');
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const input1 = document.getElementById('input1');
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const input2 = document.getElementById('input2');
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const exportCanvas = document.getElementById('exportCanvas');
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const longPressTip = document.getElementById('longPressTip');
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const canvasArea = document.getElementById('canvasArea');
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const textEditorToolbar = document.getElementById('textEditorToolbar');
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const boldBtn = document.getElementById('boldBtn');
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const italicBtn = document.getElementById('italicBtn');
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const colorPicker = document.getElementById('colorPicker');
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const fontPicker = document.getElementById('fontPicker');
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const fontSizePicker = document.getElementById('fontSizePicker');
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let currentImage = null;
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let selectedInput = null;
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let editingInput = null;
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let longPressTimer = null;
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// 图片滑动调整位置相关变量
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let imageOffsetX = 0;
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let isDraggingImage = false;
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let imageStartX = 0;
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let imageStartOffsetX = 0;
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let minOffsetX = 0;
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let maxOffsetX = 0;
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// 初始化
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init();
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function init() {
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// 添加图片按钮
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addImageBtn.addEventListener('click', () => {
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fileInput.click();
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});
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// 文件选择
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fileInput.addEventListener('change', (e) => {
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const file = e.target.files[0];
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if (file) {
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loadImage(file);
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}
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fileInput.value = '';
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});
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// 保存按钮
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saveBtn.addEventListener('click', saveImage);
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// 初始化输入框
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initInput(input1);
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initInput(input2);
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// 初始化图片滑动
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initImageDrag();
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// 点击空白区域取消选中
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document.addEventListener('click', (e) => {
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// 只有点击真正的空白区域（不是输入框，不是图片容器，不是工具栏）才取消选中
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const isTextInput = e.target.closest('.text-input');
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const isImageContainer = e.target.closest('.image-container');
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const isToolbar = e.target.closest('.toolbar');
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const isTextEditorToolbar = e.target.closest('.text-editor-toolbar');
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if (!isTextInput && !isImageContainer && !isToolbar && !isTextEditorToolbar) {
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deselectAll();
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}
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});
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// 点击容器空白处取消选中
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imageContainer.addEventListener('click', (e) => {
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// 点击容器、背景图层或背景图片，取消输入框选中
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if (e.target === imageContainer ||
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e.target === bgLayer ||
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e.target === bgImage ||
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e.target.closest('.preview-bg-layer')) {
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deselectAll();
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}
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});
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// 初始化长按保存（只在3:5预览区域）
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initLongPressSave();
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// 初始化右键菜单（只在3:5预览区域）
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initContextMenu();
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// 初始化文本编辑器工具栏
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initTextEditorToolbar();
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// 显示长按提示
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setTimeout(() => {
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longPressTip.classList.add('show');
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setTimeout(() => {
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longPressTip.classList.remove('show');
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}, 3000);
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}, 1000);
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}
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// 加载图片
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function loadImage(file) {
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const reader = new FileReader();
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reader.onload = (e) => {
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const img = new Image();
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img.onload = () => {
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currentImage = img;
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bgImage.src = img.src;
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imageContainer.classList.remove('empty');
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emptyTip.classList.add('hidden');
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// 计算图片尺寸和边界
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calculateImageBounds();
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// 背景图选择后默认居中显示
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imageOffsetX = 0;
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updateImagePosition();
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};
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img.src = e.target.result;
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};
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reader.readAsDataURL(file);
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}
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// 计算图片滑动边界
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function calculateImageBounds() {
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if (!currentImage) return;
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const containerWidth = imageContainer.clientWidth;
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const containerHeight = imageContainer.clientHeight;
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const imgRatio = currentImage.naturalWidth / currentImage.naturalHeight;
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const containerRatio = containerWidth / containerHeight;
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let imgWidth, imgHeight;
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if (imgRatio > containerRatio) {
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// 图片更宽，以高度为基准计算宽度
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imgHeight = containerHeight;
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imgWidth = imgHeight * imgRatio;
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} else {
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// 图片更高或等比，以宽度为基准
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imgWidth = containerWidth;
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imgHeight = imgWidth / imgRatio;
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}
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// 计算滑动边界：严格以图片边缘为边界，不能露出白板
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// 滑动公式：imageOffsetX = imageStartOffsetX + deltaX
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// 手指向右滑动(deltaX>0) → imageOffsetX增大 → 图片右移，显示右侧
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// 手指向左滑动(deltaX<0) → imageOffsetX减小 → 图片左移，显示左侧
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// 初始位置居中：imageOffsetX = 0，此时 baseLeft 已使图片居中
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if (imgWidth > containerWidth) {
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// 图片宽度大于容器，可以滑动
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// minOffsetX = -(imgWidth - containerWidth) / 2：向左滑到极限（显示左侧）
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// maxOffsetX = (imgWidth - containerWidth) / 2：向右滑到极限（显示右侧）
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const halfRange = (imgWidth - containerWidth) / 2;
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minOffsetX = -halfRange;
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maxOffsetX = halfRange;
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} else {
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// 图片宽度小于等于容器，居中显示，不能滑动
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minOffsetX = 0;
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maxOffsetX = 0;
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}
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}
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// 更新图片位置
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function updateImagePosition() {
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if (!currentImage) return;
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// 限制滑动范围，确保不露出白板
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imageOffsetX = Math.max(minOffsetX, Math.min(maxOffsetX, imageOffsetX));
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const containerWidth = imageContainer.clientWidth;
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const containerHeight = imageContainer.clientHeight;
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const imgRatio = currentImage.naturalWidth / currentImage.naturalHeight;
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const containerRatio = containerWidth / containerHeight;
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let imgWidth, imgHeight;
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if (imgRatio > containerRatio) {
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imgHeight = containerHeight;
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imgWidth = imgHeight * imgRatio;
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} else {
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imgWidth = containerWidth;
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imgHeight = imgWidth / imgRatio;
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}
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// 应用位置
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const baseLeft = (containerWidth - imgWidth) / 2;
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bgImage.style.width = imgWidth + 'px';
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bgImage.style.height = imgHeight + 'px';
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bgImage.style.left = (baseLeft + imageOffsetX) + 'px';
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bgImage.style.transform = 'none';
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}
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// 初始化图片滑动调整位置
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function initImageDrag() {
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// 鼠标按下
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imageContainer.addEventListener('mousedown', handleImageStart);
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imageContainer.addEventListener('touchstart', handleImageStart, { passive: false });
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// 鼠标移动
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document.addEventListener('mousemove', handleImageMove);
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document.addEventListener('touchmove', handleImageMove, { passive: false });
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// 鼠标释放
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document.addEventListener('mouseup', handleImageEnd);
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document.addEventListener('touchend', handleImageEnd);
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function handleImageStart(e) {
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// 如果点击的是输入框，不处理图片滑动
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if (e.target.closest('.text-input')) {
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return;
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}
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// 如果正在编辑，先退出编辑状态
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if (editingInput) {
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deselectAll();
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}
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// 如果没有图片，不处理
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if (!currentImage) {
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return;
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}
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const isTouch = e.type === 'touchstart';
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const clientX = isTouch ? e.touches[0].clientX : e.clientX;
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// 只有点击图片本身或背景图层时才启动图片滑动
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const isImageOrBgLayer = e.target === bgImage ||
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e.target === bgLayer ||
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e.target === imageContainer;
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if (!isImageOrBgLayer) {
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return;
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}
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isDraggingImage = true;
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imageStartX = clientX;
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imageStartOffsetX = imageOffsetX;
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if (isTouch) {
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e.preventDefault();
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}
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}
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function handleImageMove(e) {
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if (!isDraggingImage) return;
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const isTouch = e.type === 'touchmove';
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const clientX = isTouch ? e.touches[0].clientX : e.clientX;
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const deltaX = clientX - imageStartX;
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// 反转拖拽：手指向右滑动(deltaX>0) → imageOffsetX增大 → 图片右移，显示右侧
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// 手指向左滑动(deltaX<0) → imageOffsetX减小 → 图片左移，显示左侧
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imageOffsetX = imageStartOffsetX + deltaX;
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updateImagePosition();
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if (isTouch) {
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e.preventDefault();
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}
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}
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function handleImageEnd() {
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isDraggingImage = false;
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}
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}
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// 初始化输入框 - 每个输入框独立管理自己的拖拽状态
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function initInput(element) {
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let isMouseDown = false;
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let isDragging = false;
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let dragTimer = null;
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let startX, startY, startLeft, startTop;
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let clickStartTime = 0;
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let clickStartX = 0;
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let clickStartY = 0;
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let hasMoved = false;
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// 鼠标/触摸按下
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element.addEventListener('mousedown', handleStart);
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element.addEventListener('touchstart', handleStart, { passive: false });
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function handleStart(e) {
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const isTouch = e.type === 'touchstart';
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// 如果正在编辑此输入框，不处理拖拽事件，让浏览器处理文本选择
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if (editingInput === element) {
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return;
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}
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const clientX = isTouch ? e.touches[0].clientX : e.clientX;
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const clientY = isTouch ? e.touches[0].clientY : e.clientY;
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isMouseDown = true;
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clickStartTime = Date.now();
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clickStartX = clientX;
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clickStartY = clientY;
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hasMoved = false;
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isDragging = false;
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// 选中此输入框
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selectInput(element);
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startX = clientX;
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startY = clientY;
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startLeft = element.offsetLeft;
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startTop = element.offsetTop;
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// 延迟判断是否为拖拽
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dragTimer = setTimeout(() => {
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if (isMouseDown) {
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isDragging = true;
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element.classList.add('dragging');
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}
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}, 150);
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// 阻止事件冒泡，避免触发图片滑动
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e.stopPropagation();
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}
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// 鼠标/触摸移动
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element.addEventListener('mousemove', handleMove);
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element.addEventListener('touchmove', handleMove, { passive: false });
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function handleMove(e) {
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// 如果正在编辑，不拦截事件，让浏览器处理文本选择
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if (editingInput === element) {
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return;
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}
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if (!isMouseDown) return;
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if (!selectedInput) return;
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const isTouch = e.type === 'touchmove';
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const clientX = isTouch ? e.touches[0].clientX : e.clientX;
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const clientY = isTouch ? e.touches[0].clientY : e.clientY;
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const moveDistance = Math.sqrt(
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Math.pow(clientX - clickStartX, 2) +
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Math.pow(clientY - clickStartY, 2)
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);
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if (moveDistance > 5) {
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hasMoved = true;
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if (dragTimer) {
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clearTimeout(dragTimer);
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dragTimer = null;
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}
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if (!isDragging) {
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isDragging = true;
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element.classList.add('dragging');
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}
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}
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if (isDragging) {
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const dx = clientX - startX;
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const dy = clientY - startY;
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element.style.left = (startLeft + dx) + 'px';
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element.style.top = (startTop + dy) + 'px';
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}
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// 阻止事件冒泡，避免触发图片滑动
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e.stopPropagation();
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}
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// 鼠标/触摸释放
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element.addEventListener('mouseup', handleEnd);
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element.addEventListener('touchend', handleEnd);
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element.addEventListener('mouseleave', (e) => {
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if (isMouseDown) {
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handleEnd(e);
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}
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});
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function handleEnd(e) {
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isMouseDown = false;
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if (dragTimer) {
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clearTimeout(dragTimer);
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dragTimer = null;
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}
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if (isDragging) {
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isDragging = false;
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element.classList.remove('dragging');
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}
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// 阻止事件冒泡
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if (e) {
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e.stopPropagation();
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}
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}
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// 双击进入编辑模式（电脑端和移动端通用）
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element.addEventListener('dblclick', (e) => {
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e.stopPropagation();
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startEdit(element);
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});
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// 触摸双击检测（移动端双击进入编辑）
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let lastTapTime = 0;
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element.addEventListener('touchend', (e) => {
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const currentTime = Date.now();
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if (currentTime - lastTapTime < 300) {
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e.stopPropagation();
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startEdit(element);
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}
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lastTapTime = currentTime;
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});
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}
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// 选中输入框
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function selectInput(element) {
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if (editingInput && editingInput !== element) {
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endEdit(editingInput);
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}
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if (selectedInput && selectedInput !== element) {
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selectedInput.classList.remove('selected');
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}
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selectedInput = element;
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element.classList.add('selected');
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element.classList.remove('editing');
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element.contentEditable = 'false';
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}
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// 开始编辑
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function startEdit(element) {
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if (editingInput && editingInput !== element) {
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endEdit(editingInput);
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}
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editingInput = element;
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selectedInput = element;
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element.classList.add('editing');
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element.classList.remove('selected');
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element.contentEditable = 'true';
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// 更新工具栏状态
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updateToolbarState(element);
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// 如果没有选中文本，则定位光标到末尾
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setTimeout(() => {
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const sel = window.getSelection();
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if (sel.isCollapsed) {
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const range = document.createRange();
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range.selectNodeContents(element);
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range.collapse(false);
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sel.removeAllRanges();
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sel.addRange(range);
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}
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element.focus();
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}, 10);
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if ('virtualKeyboard' in navigator) {
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navigator.virtualKeyboard.show();
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}
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}
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// 结束编辑
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function endEdit(element) {
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element.classList.remove('editing');
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element.contentEditable = 'false';
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element.blur();
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editingInput = null;
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}
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// 更新工具栏状态
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||
function updateToolbarState(element) {
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const style = window.getComputedStyle(element);
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||
const fontWeight = style.fontWeight;
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const fontStyle = style.fontStyle;
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const color = style.color;
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const fontFamily = style.fontFamily.replace(/['"]/g, '');
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const fontSize = parseInt(style.fontSize);
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||
// 更新加粗按钮状态
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||
boldBtn.classList.toggle('active', fontWeight === 'bold' || fontWeight === '700' || parseInt(fontWeight) >= 700);
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|
||
// 更新斜体按钮状态
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||
italicBtn.classList.toggle('active', fontStyle === 'italic');
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||
// 更新颜色选择器
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||
colorPicker.value = rgbToHex(color);
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||
|
||
// 更新字体选择器
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||
for (let option of fontPicker.options) {
|
||
if (option.value === fontFamily || fontFamily.includes(option.value)) {
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||
fontPicker.value = option.value;
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break;
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}
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}
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||
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||
// 更新字号选择器
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||
fontSizePicker.value = fontSize.toString();
|
||
}
|
||
|
||
// RGB转十六进制
|
||
function rgbToHex(rgb) {
|
||
if (rgb.startsWith('#')) return rgb;
|
||
const match = rgb.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
|
||
if (!match) return '#000000';
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||
return '#' + [match[1], match[2], match[3]].map(x => parseInt(x).toString(16).padStart(2, '0')).join('');
|
||
}
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||
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||
// 取消所有选中
|
||
function deselectAll() {
|
||
if (editingInput) {
|
||
endEdit(editingInput);
|
||
}
|
||
if (selectedInput) {
|
||
selectedInput.classList.remove('selected');
|
||
selectedInput = null;
|
||
}
|
||
}
|
||
|
||
// 初始化长按保存（只在3:5预览区域）
|
||
function initLongPressSave() {
|
||
// 只在图片容器上触发长按保存
|
||
imageContainer.addEventListener('touchstart', (e) => {
|
||
// 如果触摸的是输入框，不触发长按保存
|
||
if (e.target.closest('.text-input')) {
|
||
return;
|
||
}
|
||
|
||
longPressTimer = setTimeout(() => {
|
||
if (navigator.vibrate) {
|
||
navigator.vibrate(50);
|
||
}
|
||
saveImage();
|
||
}, 800);
|
||
}, { passive: true });
|
||
|
||
imageContainer.addEventListener('touchend', () => {
|
||
if (longPressTimer) {
|
||
clearTimeout(longPressTimer);
|
||
longPressTimer = null;
|
||
}
|
||
});
|
||
|
||
imageContainer.addEventListener('touchmove', () => {
|
||
if (longPressTimer) {
|
||
clearTimeout(longPressTimer);
|
||
longPressTimer = null;
|
||
}
|
||
});
|
||
}
|
||
|
||
// 初始化右键菜单（只在3:5预览区域）
|
||
function initContextMenu() {
|
||
// 只在图片容器上禁用默认右键菜单并显示自定义菜单
|
||
imageContainer.addEventListener('contextmenu', (e) => {
|
||
// 如果右键点击的是输入框，显示默认菜单
|
||
if (e.target.closest('.text-input')) {
|
||
return;
|
||
}
|
||
|
||
e.preventDefault();
|
||
showContextMenu(e.clientX, e.clientY);
|
||
});
|
||
|
||
// 点击其他地方关闭菜单
|
||
document.addEventListener('click', () => {
|
||
hideContextMenu();
|
||
});
|
||
}
|
||
|
||
// 初始化文本编辑器工具栏
|
||
function initTextEditorToolbar() {
|
||
// 加粗按钮
|
||
boldBtn.addEventListener('click', () => {
|
||
if (!editingInput) return;
|
||
const selection = window.getSelection();
|
||
if (selection.rangeCount > 0 && !selection.isCollapsed) {
|
||
document.execCommand('bold', false, null);
|
||
} else {
|
||
const isBold = boldBtn.classList.contains('active');
|
||
if (isBold) {
|
||
editingInput.style.fontWeight = 'normal';
|
||
} else {
|
||
editingInput.style.fontWeight = 'bold';
|
||
}
|
||
boldBtn.classList.toggle('active');
|
||
}
|
||
});
|
||
|
||
// 斜体按钮
|
||
italicBtn.addEventListener('click', () => {
|
||
if (!editingInput) return;
|
||
const selection = window.getSelection();
|
||
if (selection.rangeCount > 0 && !selection.isCollapsed) {
|
||
document.execCommand('italic', false, null);
|
||
} else {
|
||
const isItalic = italicBtn.classList.contains('active');
|
||
if (isItalic) {
|
||
editingInput.style.fontStyle = 'normal';
|
||
} else {
|
||
editingInput.style.fontStyle = 'italic';
|
||
}
|
||
italicBtn.classList.toggle('active');
|
||
}
|
||
});
|
||
|
||
// 颜色选择器
|
||
colorPicker.addEventListener('input', () => {
|
||
if (!editingInput) return;
|
||
const selection = window.getSelection();
|
||
if (selection.rangeCount > 0 && !selection.isCollapsed) {
|
||
document.execCommand('foreColor', false, colorPicker.value);
|
||
} else {
|
||
editingInput.style.color = colorPicker.value;
|
||
}
|
||
});
|
||
|
||
// 字体选择器
|
||
fontPicker.addEventListener('change', () => {
|
||
if (!editingInput) return;
|
||
editingInput.style.fontFamily = fontPicker.value + ', sans-serif';
|
||
});
|
||
|
||
// 字号选择器
|
||
fontSizePicker.addEventListener('change', () => {
|
||
if (!editingInput) return;
|
||
editingInput.style.fontSize = fontSizePicker.value + 'px';
|
||
});
|
||
}
|
||
|
||
// 显示右键菜单
|
||
function showContextMenu(x, y) {
|
||
hideContextMenu();
|
||
|
||
const menu = document.createElement('div');
|
||
menu.className = 'context-menu';
|
||
menu.id = 'contextMenu';
|
||
menu.style.left = x + 'px';
|
||
menu.style.top = y + 'px';
|
||
|
||
const previewItem = document.createElement('div');
|
||
previewItem.className = 'context-menu-item';
|
||
previewItem.textContent = '预览图片';
|
||
previewItem.addEventListener('click', () => {
|
||
showPreview();
|
||
hideContextMenu();
|
||
});
|
||
|
||
const copyItem = document.createElement('div');
|
||
copyItem.className = 'context-menu-item';
|
||
copyItem.textContent = '复制图片';
|
||
copyItem.addEventListener('click', async () => {
|
||
await copyImageToClipboard();
|
||
hideContextMenu();
|
||
});
|
||
|
||
const saveItem = document.createElement('div');
|
||
saveItem.className = 'context-menu-item';
|
||
saveItem.textContent = '保存图片';
|
||
saveItem.addEventListener('click', () => {
|
||
saveImage();
|
||
hideContextMenu();
|
||
});
|
||
|
||
menu.appendChild(previewItem);
|
||
menu.appendChild(copyItem);
|
||
menu.appendChild(saveItem);
|
||
document.body.appendChild(menu);
|
||
}
|
||
|
||
// 显示预览
|
||
async function showPreview() {
|
||
const canvas = await generateCanvas();
|
||
const dataUrl = canvas.toDataURL('image/png');
|
||
|
||
const tipOverlay = document.createElement('div');
|
||
tipOverlay.id = 'previewTip';
|
||
tipOverlay.style.cssText = `
|
||
position: fixed;
|
||
top: 0;
|
||
left: 0;
|
||
right: 0;
|
||
bottom: 0;
|
||
background: rgba(0,0,0,0.9);
|
||
display: flex;
|
||
flex-direction: column;
|
||
align-items: center;
|
||
justify-content: center;
|
||
z-index: 10000;
|
||
padding: 20px;
|
||
`;
|
||
|
||
const tipText = document.createElement('p');
|
||
tipText.textContent = '预览图片';
|
||
tipText.style.cssText = `
|
||
color: #fff;
|
||
font-size: 18px;
|
||
margin-bottom: 20px;
|
||
text-align: center;
|
||
`;
|
||
|
||
const img = document.createElement('img');
|
||
img.src = dataUrl;
|
||
img.style.cssText = `
|
||
max-width: 100%;
|
||
max-height: 80vh;
|
||
border-radius: 8px;
|
||
box-shadow: 0 4px 20px rgba(255,255,255,0.2);
|
||
`;
|
||
|
||
const closeBtn = document.createElement('button');
|
||
closeBtn.textContent = '关闭';
|
||
closeBtn.style.cssText = `
|
||
margin-top: 20px;
|
||
padding: 12px 40px;
|
||
font-size: 16px;
|
||
background: #fff;
|
||
color: #333;
|
||
border: none;
|
||
border-radius: 25px;
|
||
cursor: pointer;
|
||
`;
|
||
closeBtn.onclick = () => tipOverlay.remove();
|
||
|
||
tipOverlay.appendChild(tipText);
|
||
tipOverlay.appendChild(img);
|
||
tipOverlay.appendChild(closeBtn);
|
||
document.body.appendChild(tipOverlay);
|
||
}
|
||
|
||
// 隐藏右键菜单
|
||
function hideContextMenu() {
|
||
const existingMenu = document.getElementById('contextMenu');
|
||
if (existingMenu) {
|
||
existingMenu.remove();
|
||
}
|
||
}
|
||
|
||
// 复制图片到剪贴板
|
||
async function copyImageToClipboard() {
|
||
if (!currentImage) {
|
||
alert('请先添加背景图片');
|
||
return;
|
||
}
|
||
|
||
try {
|
||
deselectAll();
|
||
const canvas = await generateCanvas();
|
||
const blob = await new Promise(resolve => canvas.toBlob(resolve, 'image/png'));
|
||
|
||
await navigator.clipboard.write([
|
||
new ClipboardItem({ 'image/png': blob })
|
||
]);
|
||
|
||
alert('图片已复制到剪贴板');
|
||
} catch (err) {
|
||
console.error('复制失败:', err);
|
||
alert('复制失败，请尝试保存图片');
|
||
}
|
||
}
|
||
|
||
// 生成画布（预览与保存样式一致）
|
||
async function generateCanvas() {
|
||
const canvas = exportCanvas;
|
||
const ctx = canvas.getContext('2d');
|
||
|
||
const containerWidth = imageContainer.clientWidth;
|
||
const containerHeight = imageContainer.clientHeight;
|
||
|
||
canvas.width = containerWidth;
|
||
canvas.height = containerHeight;
|
||
|
||
// 绘制白色背景
|
||
ctx.fillStyle = '#fff';
|
||
ctx.fillRect(0, 0, canvas.width, canvas.height);
|
||
|
||
// 绘制背景图（考虑滑动偏移）
|
||
if (currentImage) {
|
||
drawImageWithOffset(ctx, currentImage, containerWidth, containerHeight);
|
||
}
|
||
|
||
// 绘制文字
|
||
drawTextOnCanvas(ctx, input1);
|
||
drawTextOnCanvas(ctx, input2);
|
||
|
||
return canvas;
|
||
}
|
||
|
||
// 绘制图片（考虑滑动偏移）
|
||
function drawImageWithOffset(ctx, img, containerWidth, containerHeight) {
|
||
const imgRatio = img.naturalWidth / img.naturalHeight;
|
||
const containerRatio = containerWidth / containerHeight;
|
||
|
||
let imgWidth, imgHeight;
|
||
|
||
if (imgRatio > containerRatio) {
|
||
imgHeight = containerHeight;
|
||
imgWidth = imgHeight * imgRatio;
|
||
} else {
|
||
imgWidth = containerWidth;
|
||
imgHeight = imgWidth / imgRatio;
|
||
}
|
||
|
||
const baseLeft = (containerWidth - imgWidth) / 2;
|
||
const drawX = baseLeft + imageOffsetX;
|
||
|
||
ctx.drawImage(img, drawX, 0, imgWidth, imgHeight);
|
||
}
|
||
|
||
// 在画布上绘制文字
|
||
function drawTextOnCanvas(ctx, inputElement) {
|
||
const text = inputElement.textContent;
|
||
if (!text) return;
|
||
|
||
const style = window.getComputedStyle(inputElement);
|
||
const inputLeft = inputElement.offsetLeft;
|
||
const inputTop = inputElement.offsetTop;
|
||
|
||
const fontSize = parseInt(style.fontSize);
|
||
ctx.font = `${style.fontWeight} ${fontSize}px ${style.fontFamily}`;
|
||
ctx.fillStyle = style.color;
|
||
ctx.textBaseline = 'top';
|
||
|
||
ctx.fillText(text, inputLeft, inputTop);
|
||
}
|
||
|
||
// 保存图片
|
||
async function saveImage() {
|
||
if (!currentImage) {
|
||
alert('请先添加背景图片');
|
||
return;
|
||
}
|
||
|
||
try {
|
||
const canvas = await generateCanvas();
|
||
showMobileSaveTip();
|
||
} catch (err) {
|
||
console.error('保存失败:', err);
|
||
alert('保存失败，请重试');
|
||
}
|
||
}
|
||
|
||
// 显示移动端保存选项
|
||
function showMobileSaveTip() {
|
||
const canvas = exportCanvas;
|
||
const dataUrl = canvas.toDataURL('image/png');
|
||
const filename = '邀请函_' + Date.now() + '.png';
|
||
|
||
const tipOverlay = document.createElement('div');
|
||
tipOverlay.id = 'mobileSaveTip';
|
||
tipOverlay.style.cssText = `
|
||
position: fixed;
|
||
top: 0;
|
||
left: 0;
|
||
right: 0;
|
||
bottom: 0;
|
||
background: rgba(0,0,0,0.6);
|
||
display: flex;
|
||
align-items: flex-end;
|
||
justify-content: center;
|
||
z-index: 10000;
|
||
`;
|
||
|
||
const savePanel = document.createElement('div');
|
||
savePanel.style.cssText = `
|
||
width: 100%;
|
||
background: #fff;
|
||
border-radius: 16px 16px 0 0;
|
||
padding: 20px;
|
||
padding-bottom: 40px;
|
||
`;
|
||
|
||
const title = document.createElement('p');
|
||
title.textContent = '保存图片';
|
||
title.style.cssText = `
|
||
font-size: 18px;
|
||
font-weight: bold;
|
||
text-align: center;
|
||
margin-bottom: 20px;
|
||
color: #333;
|
||
`;
|
||
|
||
const saveBtn = document.createElement('button');
|
||
saveBtn.textContent = '保存到相册';
|
||
saveBtn.style.cssText = `
|
||
width: 100%;
|
||
padding: 16px;
|
||
font-size: 16px;
|
||
background: #007AFF;
|
||
color: #fff;
|
||
border: none;
|
||
border-radius: 10px;
|
||
cursor: pointer;
|
||
margin-bottom: 12px;
|
||
`;
|
||
saveBtn.onclick = () => {
|
||
tipOverlay.remove();
|
||
const link = document.createElement('a');
|
||
link.download = filename;
|
||
link.href = dataUrl;
|
||
link.click();
|
||
};
|
||
|
||
const cancelBtn = document.createElement('button');
|
||
cancelBtn.textContent = '取消';
|
||
cancelBtn.style.cssText = `
|
||
width: 100%;
|
||
padding: 16px;
|
||
font-size: 16px;
|
||
background: #F2F2F7;
|
||
color: #333;
|
||
border: none;
|
||
border-radius: 10px;
|
||
cursor: pointer;
|
||
`;
|
||
cancelBtn.onclick = () => tipOverlay.remove();
|
||
|
||
tipOverlay.addEventListener('click', (e) => {
|
||
if (e.target === tipOverlay) {
|
||
tipOverlay.remove();
|
||
}
|
||
});
|
||
|
||
savePanel.appendChild(title);
|
||
savePanel.appendChild(saveBtn);
|
||
savePanel.appendChild(cancelBtn);
|
||
tipOverlay.appendChild(savePanel);
|
||
document.body.appendChild(tipOverlay);
|
||
|
||
// 添加预览按钮
|
||
const previewBtn = document.createElement('button');
|
||
previewBtn.textContent = '预览图片';
|
||
previewBtn.style.cssText = `
|
||
width: 100%;
|
||
padding: 16px;
|
||
font-size: 16px;
|
||
background: #34C759;
|
||
color: #fff;
|
||
border: none;
|
||
border-radius: 10px;
|
||
cursor: pointer;
|
||
margin-bottom: 12px;
|
||
`;
|
||
previewBtn.onclick = () => {
|
||
tipOverlay.remove();
|
||
showPreview();
|
||
};
|
||
|
||
// 插入到标题后面
|
||
savePanel.insertBefore(previewBtn, saveBtn);
|
||
}
|
||
|
||
// 窗口大小改变时更新图片位置和边界
|
||
window.addEventListener('resize', () => {
|
||
if (currentImage) {
|
||
calculateImageBounds();
|
||
updateImagePosition();
|
||
}
|
||
});
|
||
})();
|