更新

2026-08-11 17:41:36 +08:00
parent cfe4c82c90
commit 03fe4ddf9d
18771 changed files with 3617239 additions and 0 deletions
@@ -0,0 +1,123 @@
+var toEl = require('./toEl');
+var isStr = require('./isStr');
+var h = require('./h');
+var isNull = require('./isNull');
+var each = require('./each');
+
+exports = function(from, to) {
+    if (isStr(to)) {
+        to = toEl(to);
+    }
+    var morphed = from;
+    var morphedType = morphed.nodeType;
+    var toType = to.nodeType;
+    if (morphedType === toType) {
+        if (morphedType === ELEMENT_NODE) {
+            if (morphed.nodeName !== to.nodeName) {
+                morphed = h(to.nodeName);
+                moveChildren(from, morphed);
+            }
+        } else if (morphedType === TEXT_NODE || morphedType === COMMENT_NODE) {
+            if (morphed.nodeValue !== to.nodeValue) {
+                morphed.nodeValue = to.nodeValue;
+            }
+            return morphed;
+        }
+    } else {
+        morphed = to;
+    }
+    if (morphed !== to) {
+        morphEl(morphed, to);
+    }
+    if (from.parentNode) {
+        from.parentNode.replaceChild(morphed, from);
+    }
+    return morphed;
+};
+var ELEMENT_NODE = 1;
+var TEXT_NODE = 3;
+var COMMENT_NODE = 8;
+function morphEl(from, to) {
+    morphAttrs(from, to);
+    morphChildren(from, to);
+}
+function morphAttrs(from, to) {
+    var attrs = to.attributes;
+    each(attrs, function(_ref) {
+        var name = _ref.name,
+            value = _ref.value;
+        var fromVal = from.getAttribute(name);
+        if (fromVal !== value) {
+            from.setAttribute(name, value);
+        }
+    });
+    attrs = from.attributes;
+    var removedAttrNames = [];
+    each(attrs, function(_ref2) {
+        var name = _ref2.name;
+        if (isNull(to.getAttribute(name))) {
+            removedAttrNames.push(name);
+        }
+    });
+    each(removedAttrNames, function(name) {
+        return from.removeAttribute(name);
+    });
+}
+function morphChildren(from, to) {
+    var curToChild = to.firstChild;
+    var curFromChild = from.firstChild;
+    var toNextSibling;
+    var fromNextSibling;
+    outer: while (curToChild) {
+        toNextSibling = curToChild.nextSibling;
+        while (curFromChild) {
+            fromNextSibling = curFromChild.nextSibling;
+            var isCompatible = false;
+            var curFromType = curFromChild.nodeType;
+            var curToType = curToChild.nodeType;
+            if (curFromType === curToType) {
+                if (curFromType === ELEMENT_NODE) {
+                    if (curFromChild.nodeName === curToChild.nodeName) {
+                        isCompatible = true;
+                        morphEl(curFromChild, curToChild);
+                    }
+                } else if (
+                    curFromType === TEXT_NODE ||
+                    curFromType === COMMENT_NODE
+                ) {
+                    isCompatible = true;
+                    if (curFromChild.nodeValue !== curToChild.nodeValue) {
+                        curFromChild.nodeValue = curToChild.nodeValue;
+                    }
+                }
+            }
+            if (isCompatible) {
+                curToChild = toNextSibling;
+                curFromChild = fromNextSibling;
+                continue outer;
+            }
+            from.removeChild(curFromChild);
+            curFromChild = fromNextSibling;
+        }
+        from.appendChild(curToChild);
+        curFromChild = fromNextSibling;
+        curToChild = toNextSibling;
+    }
+    if (curFromChild) {
+        while (curFromChild) {
+            fromNextSibling = curFromChild.nextSibling;
+            from.removeChild(curFromChild);
+            curFromChild = fromNextSibling;
+        }
+    }
+}
+function moveChildren(from, to) {
+    var curChild = from.firstChild;
+    while (curChild) {
+        var nextChild = curChild.nextSibling;
+        to.appendChild(curChild);
+        curChild = nextChild;
+    }
+}
+
+module.exports = exports;