[update] pdf预览页面、标准解读查看页面增加复制字符长度限制1000，超出后复制自动截取前1000个字符

2024-10-12 11:38:42 +08:00
parent b58f1e89c1
commit d35dbdcbc3
5 changed files with 98 additions and 6 deletions
@@ -623,11 +623,50 @@ See https://github.com/adobe-type-tools/cmap-resources
  const handleSelectionChange = (event) => {
    const windowSelection = window.getSelection()
    const selectionText = windowSelection ? window.getSelection().toString() : document.selection.createRange().text
-    if (selectionText.length > 500) {
-      alert('超出可复制长度')
-      windowSelection ? window.getSelection().removeAllRanges() : document.selection.empty()
+    // if (selectionText.length > 50) {
+      // alert('超出可复制长度')
+      // windowSelection ? window.getSelection().removeAllRanges() : document.selection.empty()
+    // }
+  }
+  document.addEventListener('selectionchange', handleSelectionChange);
+
+  const handleCopy = (e) => {
+    const COPY_MAX_LENGTH = 1000
+    const windowSelection = window.getSelection()
+    let selectionText = windowSelection ? window.getSelection().toString() : document.selection.createRange().text
+    if (selectionText.length > COPY_MAX_LENGTH) {
+      // 单次复制超过x个字，提示并截取前x字
+      alert('超出可复制长度' + COPY_MAX_LENGTH)
+      selectionText = selectionText.substring(0, COPY_MAX_LENGTH)
+      // 清楚页面选中的效果
+      const wSelections = window.getSelection()
+      if (wSelections) {
+        wSelections.removeAllRanges()
+      } else {
+        document.selection.empty()
+      }
+      const tempTextarea = document.createElement('textarea')
+      tempTextarea.value = selectionText
+      tempTextarea.style.height = '0px'
+      tempTextarea.style.width = '0px'
+      document.body.appendChild(tempTextarea)
+      tempTextarea.select()// Safari兼容
+      tempTextarea.setSelectionRange(0, 99999999)
+      let timer = setTimeout(() => {
+        document.execCommand('copy')
+        document.body.removeChild(tempTextarea)
+        // 清除 textarea 选中的效果
+        if (window.getSelection()) {
+          window.getSelection()?.removeAllRanges && window.getSelection()?.removeAllRanges()
+        } else {
+          document.selection.empty()
+        }
+        clearTimeout(timer)
+        timer = null
+      }, 100)
    }
  }
-  document.addEventListener('selectionchange', handleSelectionChange)
+  // 监听复制
+  document.addEventListener('copy', handleCopy);
 </script>
 </html>