From 325d9571ece37018065a91f8b6c4b4d543d7ee50 Mon Sep 17 00:00:00 2001
From: * <8>
Date: Wed, 22 Dec 2021 20:03:34 +0800
Subject: [PATCH] Match-id-73c0fd446aab80ee0e351fda1a6d575656e751f4

---
 libs/horizon/src/dom/utils/Common.ts     | 75 ++++++++++++++++++++++++
 libs/horizon/src/dom/utils/DomCreator.ts | 25 ++++++++
 libs/horizon/src/dom/utils/Interface.ts  |  9 +++
 3 files changed, 109 insertions(+)
 create mode 100644 libs/horizon/src/dom/utils/Common.ts
 create mode 100644 libs/horizon/src/dom/utils/DomCreator.ts
 create mode 100644 libs/horizon/src/dom/utils/Interface.ts

diff --git a/libs/horizon/src/dom/utils/Common.ts b/libs/horizon/src/dom/utils/Common.ts
new file mode 100644
index 00000000..771105bb
--- /dev/null
+++ b/libs/horizon/src/dom/utils/Common.ts
@@ -0,0 +1,75 @@
+import {HorizonDom} from './Interface';
+
+/**
+ * 获取当前聚焦的 input 或者 textarea 元素
+ * @param currentDoc 指定 document
+ */
+export function getFocusedDom(currentDoc?: Document): HorizonDom | void {
+  let currentDocument;
+  if (currentDoc) {
+    currentDocument = currentDoc;
+  } else {
+    if (document) {
+      currentDocument = document;
+    }
+  }
+  if (!currentDocument) {
+    return null;
+  } else if (currentDocument.activeElement) {
+    return currentDocument.activeElement;
+  } else {
+    return currentDocument.body;
+  }
+}
+
+// 如果 input 或者 textarea 元素中有文字被选中时，activeElement 属性就会返回该元素
+// 此处是为了返回深层的 iframe 中的真实元素
+export function getIFrameFocusedDom() {
+  const currentWindow = window;
+  let focusedDom = getFocusedDom();
+  // 深度优先，返回的元素如果是 iframe 对象则继续查找
+  while (focusedDom instanceof currentWindow.HTMLIFrameElement) {
+    try {
+      // 访问 HTMLIframeElement 的 contentDocument 可能会导致浏览器抛出错误
+      if (typeof focusedDom.contentWindow.location.href === 'string') { // iframe 的内容为同源
+        focusedDom = getFocusedDom(focusedDom.contentWindow.document);
+      } else { // 非同源 iframe 因为安全性原因无法获取其中的具体元素
+        break;
+      }
+    } catch (e) { // 非同源 iframe 因为安全性原因无法获取其中的具体元素
+      break;
+    }
+  }
+  return focusedDom;
+}
+
+export function isElement(dom) {
+  return dom.nodeType === 1;
+}
+
+export function isText(dom) {
+  return dom.nodeType === 3;
+}
+
+export function isComment(dom) {
+  return dom.nodeType === 8;
+}
+
+export function isDocument(dom) {
+  return dom.nodeType === 9;
+}
+
+export function isDocumentFragment(dom) {
+  return dom.nodeType === 11;
+}
+
+export function getRootElement(dom: HorizonDom): HorizonDom {
+  let rootElement = dom;
+
+  while (rootElement.parentNode) {
+    // @ts-ignore
+    rootElement = rootElement.parentNode;
+  }
+
+  return rootElement;
+}
diff --git a/libs/horizon/src/dom/utils/DomCreator.ts b/libs/horizon/src/dom/utils/DomCreator.ts
new file mode 100644
index 00000000..ee3aa387
--- /dev/null
+++ b/libs/horizon/src/dom/utils/DomCreator.ts
@@ -0,0 +1,25 @@
+
+export const NSS = {
+  html: 'http://www.w3.org/1999/xhtml',
+  math: 'http://www.w3.org/1998/Math/MathML',
+  svg: 'http://www.w3.org/2000/svg',
+};
+
+// 创建DOM元素
+export function createDom(
+  tagName: string,
+  props: Object,
+  parentNamespace: string,
+): Element {
+  let dom: Element;
+  const selfNamespace = NSS[tagName] || NSS.html;
+  const ns = parentNamespace !== NSS.html ? parentNamespace : selfNamespace;
+
+  if (ns !== NSS.html) {
+    dom = document.createElementNS(ns, tagName);
+  } else {
+    dom = document.createElement(tagName);
+  }
+
+  return dom;
+}
diff --git a/libs/horizon/src/dom/utils/Interface.ts b/libs/horizon/src/dom/utils/Interface.ts
new file mode 100644
index 00000000..62887f72
--- /dev/null
+++ b/libs/horizon/src/dom/utils/Interface.ts
@@ -0,0 +1,9 @@
+export interface IProperty {
+  [propName: string]: any
+}
+
+export interface HorizonSelect extends HTMLSelectElement {
+  _multiple: boolean;
+}
+
+export type HorizonDom = Element | HTMLInputElement | HTMLSelectElement | HTMLTextAreaElement;