20251222

AdminPanel/plugins/utils/dom/cursor.js

@@ -0,0 +1,65 @@
+/**
+
+ * 获取当前光标位置 返回表示位置的索引（number）以0开头
+
+ * @param ctrl
+
+ * @returns {number}
+
+ */
+
+export function getCursorPosition(element) {
+
+    var CaretPos = 0;
+
+    if (document.selection) {//支持IE
+
+        element.focus();
+
+        var Sel = document.selection.createRange();
+
+        Sel.moveStart('character', -element.value.length);
+
+        CaretPos = Sel.text.length;
+
+    }
+
+    else if (element.selectionStart || element.selectionStart == '0')//支持firefox
+
+        CaretPos = element.selectionStart;
+
+    return (CaretPos);
+
+}
+
+export function insertAtCursor(myField, myValue) {
+
+    //IE 浏览器 
+    if (document.selection) {
+        myField.focus();
+        sel = document.selection.createRange();
+        sel.text = myValue;
+        sel.select();
+    }
+
+    //FireFox、Chrome等 
+    else if (myField.selectionStart || myField.selectionStart == '0') {
+        var startPos = myField.selectionStart;
+        var endPos = myField.selectionEnd;
+
+        // 保存滚动条 
+        var restoreTop = myField.scrollTop;
+        myField.value = myField.value.substring(0, startPos) + myValue + myField.value.substring(endPos, myField.value.length);
+
+        if (restoreTop > 0) {
+            myField.scrollTop = restoreTop;
+        }
+
+        myField.focus();
+        myField.selectionStart = startPos + myValue.length;
+        myField.selectionEnd = startPos + myValue.length;
+    } else {
+        myField.value += myValue;
+        myField.focus();
+    }
+}