From 1fb41206e0a58ac179356f403b5096e19780da41 Mon Sep 17 00:00:00 2001
From: rex <rexkaneki@gmail.com>
Date: Fri, 16 Nov 2018 16:03:57 +0800
Subject: [PATCH] feat(Dialog): add new prop context @rex-zsd (#912)

---
 packages/dialog/README.md |  1 +
 packages/dialog/dialog.ts | 12 ++++++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/packages/dialog/README.md b/packages/dialog/README.md
index daec61a8..4d3f38b2 100644
--- a/packages/dialog/README.md
+++ b/packages/dialog/README.md
@@ -137,6 +137,7 @@ Page({
 | overlay | 是否展示蒙层 | `Boolean` | `true` |
 | closeOnClickOverlay | 点击蒙层时是否关闭弹窗 | `Boolean` | `false` |
 | asyncClose | 是否异步关闭弹窗，开启后需要手动控制弹窗的关闭 | `Boolean` | `false` |
+| context | 选择器的选择范围，可以传入自定义组件的 this 作为上下文 | `Object` | 当前页面 |
 
 ### API
 
diff --git a/packages/dialog/dialog.ts b/packages/dialog/dialog.ts
index 50e01d1d..d88e77f1 100644
--- a/packages/dialog/dialog.ts
+++ b/packages/dialog/dialog.ts
@@ -5,6 +5,7 @@ type DialogOptions = {
   show?: boolean;
   title?: string;
   zIndex?: number;
+  context?: any;
   message?: string;
   overlay?: boolean;
   selector?: string;
@@ -30,12 +31,15 @@ interface Dialog {
   currentOptions?: DialogOptions;
 }
 
+function getContext() {
+  const pages = getCurrentPages();
+  return pages[pages.length - 1];
+}
+
 const Dialog: Dialog = options => {
   return new Promise((resolve, reject) => {
-    const pages = getCurrentPages();
-    const ctx = pages[pages.length - 1];
-
-    const dialog = ctx.selectComponent(options.selector);
+    const context = options.context || getContext();
+    const dialog = context.selectComponent(options.selector);
     delete options.selector;
 
     if (dialog) {