代码生成预览支持复制内容

src/directive/common/copyText.js

@@ -0,0 +1,66 @@
+/**
+* v-copyText 复制文本内容
+* Copyright (c) 2022 ruoyi
+*/
+
+export default {
+  beforeMount(el, { value, arg }) {
+    if (arg === "callback") {
+      el.$copyCallback = value;
+    } else {
+      el.$copyValue = value;
+      const handler = () => {
+        copyTextToClipboard(el.$copyValue);
+        if (el.$copyCallback) {
+          el.$copyCallback(el.$copyValue);
+        }
+      };
+      el.addEventListener("click", handler);
+      el.$destroyCopy = () => el.removeEventListener("click", handler);
+    }
+  }
+}
+
+function copyTextToClipboard(input, { target = document.body } = {}) {
+  const element = document.createElement('textarea');
+  const previouslyFocusedElement = document.activeElement;
+
+  element.value = input;
+
+  // Prevent keyboard from showing on mobile
+  element.setAttribute('readonly', '');
+
+  element.style.contain = 'strict';
+  element.style.position = 'absolute';
+  element.style.left = '-9999px';
+  element.style.fontSize = '12pt'; // Prevent zooming on iOS
+
+  const selection = document.getSelection();
+  const originalRange = selection.rangeCount > 0 && selection.getRangeAt(0);
+
+  target.append(element);
+  element.select();
+
+  // Explicit selection workaround for iOS
+  element.selectionStart = 0;
+  element.selectionEnd = input.length;
+
+  let isSuccess = false;
+  try {
+    isSuccess = document.execCommand('copy');
+  } catch { }
+
+  element.remove();
+
+  if (originalRange) {
+    selection.removeAllRanges();
+    selection.addRange(originalRange);
+  }
+
+  // Get the focus back on the previously focused element, if any
+  if (previouslyFocusedElement) {
+    previouslyFocusedElement.focus();
+  }
+
+  return isSuccess;
+}