Pull request #2370: 无JIRA任务 chore: 新增Context组件

Merge in VISUAL/fineui from ~GUY/fineui:master to master

* commit '94bf738635c2a4314c5256004df95cb56f4eb28d':
  chore: 新增Context组件

changelog.md

@@ -1,5 +1,6 @@
 # 更新日志
 2.0(2021-12)
+- 新增Context组件
 - toast支持closable属性，可控制是否显示关闭按钮
 - 新增气泡弹框控件
 - BI.point支持widget添加埋点

src/base/context.js

@@ -0,0 +1,45 @@
+/**
+ * 表示当前对象
+ *
+ * Created by GUY on 2015/9/7.
+ * @class BI.EL
+ * @extends BI.Widget
+ */
+BI.Context = BI.inherit(BI.Widget, {
+    props: {
+        context: "",
+        watch: {},
+        el: {},
+        items: []
+    },
+
+    render: function () {
+        var self = this, o = this.options;
+        this.context = BI.createWidget(o.items[0] || o.el, {
+            element: this
+        });
+        this.context.on(BI.Controller.EVENT_CHANGE, function () {
+            self.fireEvent(BI.Controller.EVENT_CHANGE, arguments);
+        });
+    },
+
+    created: function () {
+        var o = this.options;
+        if (o.context) {
+            BI.watch(o.context, o.watch);
+        }
+    },
+
+    setValue: function (v) {
+        this.context.setValue(v);
+    },
+
+    getValue: function () {
+        return this.context.getValue();
+    },
+
+    populate: function () {
+        this.context.populate.apply(this, arguments);
+    }
+});
+BI.shortcut("bi.context", BI.Context);