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266 lines
7.3 KiB
HTML
266 lines
7.3 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>可编辑 Div 示例</title>
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</head>
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<style>
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.editable-div {
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border: 1px solid #ccc;
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padding: 10px;
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min-height: 100px;
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outline: none;
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white-space: pre-wrap;
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}
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.suggestions {
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border: 1px solid #ddd;
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background: white;
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max-height: 150px;
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overflow-y: auto;
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position: absolute;
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z-index: 1000;
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}
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.suggestion-item {
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padding: 8px;
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cursor: pointer;
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}
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.suggestion-item:hover {
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background-color: #f0f0f0;
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}
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.selected-tag {
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color: green;
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font-weight: bold;
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}
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</style>
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<style unscoped>
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.test {
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position: relative;
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color: red;
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display: inline-block;
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min-width: 10px;
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margin-left: 50px;
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margin-right: 50px;
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}
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/* .test::before { */
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/* position: absolute; */
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/* left: -20px; */
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/* content: '@'; */
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/* display: inline-block; */
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/* background: #0f0; */
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/* width: 10px; */
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/* } */
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/* .test::after { */
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/* content: '@'; */
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/* width: 10px; */
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/* display: inline-block; */
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/* background: #0ff; */
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/* /* content: attr(data-content) */
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*/
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/* } */
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</style>
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<body>
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<div class="editable-div" contenteditable="true" @input="handleInput" @keydown="handleKeydown" ref="editableDiv">
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</div>
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<div class="suggestions" v-if="showSuggestions">
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<div class="suggestion-item" v-for="(item, index) in filteredSuggestions" :key="index"
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@mousedown="selectSuggestion(item)">
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{{ item }}
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</div>
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</div>
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</body>
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<script setup>
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// 初始化数据
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textContent = "";
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suggestions = ["Alice", "Bob", "Charlie", "David", "Eve"];
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filteredSuggestions = [];
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showSuggestions = false;
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currentSelectionIndex = -1;
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// 处理输入事件
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handleInput = (e) => {
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// const div = $node.querySelector(".editable-div");
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// textContent = div.innerText;
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// // 检测是否输入了 @ 符号
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// const caretPosition = getCaretPosition(div);
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// const textBeforeCaret = textContent.substring(0, caretPosition);
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// const lastAtPos = textBeforeCaret.lastIndexOf("@");
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//
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// if (lastAtPos !== -1) {
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// const query = textBeforeCaret.substring(lastAtPos + 1);
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// filteredSuggestions = suggestions.filter((item) =>
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// item.toLowerCase().includes(query.toLowerCase())
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// );
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// } else {
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// showSuggestions = false;
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// }
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};
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// 处理键盘事件（上下箭头、回车）
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handleKeydown = (e) => {
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const selection = window.getSelection();
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const range = selection.getRangeAt(0);
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let dom = selection.anchorNode;
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if (dom.nodeType === 3) {
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dom = dom.parentNode;
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}
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if (dom && dom.hasAttribute && dom.hasAttribute('test')) {
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showSuggestions = true
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let sub = dom.innerText.slice(1)
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console.log(sub)
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filteredSuggestions = suggestions.filter((item) =>
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item.toLowerCase().includes(sub)
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);
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} else {
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showSuggestions = false
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}
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if (!showSuggestions) {
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if (e.key === '@') {
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e.preventDefault();
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const div = document.createElement('div');
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div.setAttribute('test', '')
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div.innerText = '@'
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div.classList.add('test')
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// 插入换行符到当前光标位置
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range.deleteContents(); // 清除选中的内容（如果有）
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// range.insertNode(document.createElement('div'))
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range.insertNode(div);
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// 确保光标移动到换行后的位置
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// const nextNode = br.nextSibling || br.parentNode.appendChild(document.createTextNode(''));
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const newRange = document.createRange();
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newRange.setStartAfter(div.childNodes[0]);
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newRange.collapse(true);
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// 更新选区
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selection.removeAllRanges();
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selection.addRange(newRange);
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}
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return
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}
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if (e.key === "ArrowDown") {
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e.preventDefault();
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currentSelectionIndex =
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(currentSelectionIndex + 1) % filteredSuggestions.length;
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if (isNaN(currentSelectionIndex)) {
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currentSelectionIndex = 0
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}
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highlightSuggestion();
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} else if (e.key === "ArrowUp") {
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e.preventDefault();
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currentSelectionIndex =
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(currentSelectionIndex - 1 + filteredSuggestions.length) %
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filteredSuggestions.length;
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if (isNaN(currentSelectionIndex)) {
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currentSelectionIndex = 0
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}
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highlightSuggestion();
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} else if (e.key === "Enter") {
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e.preventDefault();
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if (currentSelectionIndex !== -1) {
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let item = filteredSuggestions[currentSelectionIndex]
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console.log(dom, item)
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dom.innerText = '@' + item
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const newRange = document.createRange();
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if (!dom.nextSibling) {
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dom.parentNode.appendChild(document.createTextNode(''))
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}
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if (dom.nextSibling.nodeType === 3) {
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let span = document.createElement('span')
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span.innerText = dom.nextSibling.textContent || ' '
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span.style.minWidth = '10px'
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dom.nextSibling.replaceWith(span)
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}
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let next = dom.nextSibling
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if (next.nodeType === 3) {
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next = next.nextSibling
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}
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console.log([next])
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newRange.setStartAfter(next);
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newRange.collapse(true);
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selection.removeAllRanges(); // 清除当前的选择
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selection.addRange(newRange);
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dom.setAttribute('contenteditable', 'false')
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dom.style.contenteditable = false
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// selectSuggestion(filteredSuggestions[currentSelectionIndex]);
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}
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}
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};
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// 选中建议项
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selectSuggestion = (item) => {
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const div = $node.querySelector(".editable-div");
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const caretPosition = getCaretPosition(div);
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const textBeforeCaret = textContent.substring(0, caretPosition);
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const lastAtPos = textBeforeCaret.lastIndexOf("@");
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// 替换 @ 后的内容为绿色标记
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let before = textBeforeCaret.substring(0, lastAtPos);
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let after = textContent.substring(caretPosition)
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const newText = before +
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`<span class="selected-tag">@${item}</span>` +
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after
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console.log(newText)
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div.innerHTML = newText;
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setCaretPosition(div, lastAtPos + 2); // 重新设置光标位置
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// 隐藏建议框
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showSuggestions = false;
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currentSelectionIndex = -1;
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// 更新文本内容
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textContent = div.innerText;
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};
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// 获取光标位置
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getCaretPosition = (element) => {
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let position = 0;
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const selection = window.getSelection();
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if (selection.rangeCount > 0) {
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const range = selection.getRangeAt(0);
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const preCaretRange = range.cloneRange();
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preCaretRange.selectNodeContents(element);
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preCaretRange.setEnd(range.endContainer, range.endOffset);
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position = preCaretRange.toString().length;
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}
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return position;
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};
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// 设置光标位置
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setCaretPosition = (element, position) => {
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const range = document.createRange();
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const selection = window.getSelection();
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console.log(element.childNodes[0], element, position);
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range.setStart(element, position);
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range.collapse(true);
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selection.removeAllRanges();
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selection.addRange(range);
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};
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// 高亮当前选中的建议项
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highlightSuggestion = () => {
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const suggestionItems = $node.querySelectorAll(".suggestion-item");
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suggestionItems.forEach((item, index) => {
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item.style.backgroundColor =
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index === currentSelectionIndex ? "#f0f0f0" : "";
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});
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};
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</script>
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</html>
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