From 2a174718f0ef93b66823bed70143faf1ac439f65 Mon Sep 17 00:00:00 2001
From: bang <sqibang@gmail.com>
Date: Fri, 14 Dec 2018 12:16:03 +0800
Subject: [PATCH] feat: ImagePicker performance enhancement close #45

---
 components/image-picker/CameraRollPicker.tsx | 94 ++++----------------
 components/image-picker/ImageRoll.tsx        |  5 +-
 2 files changed, 21 insertions(+), 78 deletions(-)

diff --git a/components/image-picker/CameraRollPicker.tsx b/components/image-picker/CameraRollPicker.tsx
index d244a0501..331d0e87d 100644
--- a/components/image-picker/CameraRollPicker.tsx
+++ b/components/image-picker/CameraRollPicker.tsx
@@ -1,15 +1,10 @@
-/**
- * Copy from https://github.com/jeanpan/react-native-camera-roll-picker
- * Will refactor it later
- */
 import React, { Component } from 'react';
-import { CameraRoll, GetPhotosReturnType, StyleSheet, View, ViewStyle } from 'react-native';
+import { CameraRoll, GetPhotosParamType, StyleSheet, View, ViewStyle } from 'react-native';
 import ListView from '../list-view';
 import ImageItem from './ImageItem';
 
 export interface CameraRollPickerStyle {
   wrapper: ViewStyle;
-  loader: ViewStyle;
   row: ViewStyle;
   marker: ViewStyle;
   spinner: ViewStyle;
@@ -18,11 +13,6 @@ const styles = StyleSheet.create<CameraRollPickerStyle>({
   wrapper: {
     flex: 1,
   },
-  loader: {
-    flexGrow: 1,
-    justifyContent: 'center',
-    alignItems: 'center',
-  },
   row: {
     flexDirection: 'row',
     flex: 1,
@@ -35,21 +25,8 @@ const styles = StyleSheet.create<CameraRollPickerStyle>({
   spinner: {},
 });
 
-export type CameraRollPickerProps = {
-  scrollRenderAheadDistance?: number;
-  initialListSize?: number;
-  pageSize?: number;
-  removeClippedSubviews?: boolean;
-  groupTypes?:
-    | 'Album'
-    | 'All'
-    | 'Event'
-    | 'Faces'
-    | 'Library'
-    | 'PhotoStream'
-    | 'SavedPhotos';
+export interface CameraRollPickerProps extends GetPhotosParamType {
   maximum: number;
-  assetType?: 'Photos' | 'Videos' | 'All';
   selectSingleItem?: boolean;
   imagesPerRow: number;
   imageMargin: number;
@@ -58,32 +35,21 @@ export type CameraRollPickerProps = {
   selected?: any[];
   selectedMarker?: JSX.Element;
   backgroundColor?: string;
-  emptyText?: string;
-  emptyTextStyle?: any;
-  loader?: React.ReactNode;
-};
+}
 export type CameraRollPickerState = {
   selected: any;
-  loadingMore: boolean;
-  initialLoading: boolean;
-  dataSource?: any;
   images: any[];
-  lastCursor: null;
-  noMore: boolean;
 };
 class CameraRollPicker extends Component<
   CameraRollPickerProps,
   CameraRollPickerState
 > {
   static defaultProps = {
-    scrollRenderAheadDistance: 500,
-    initialListSize: 1,
-    pageSize: 3,
-    removeClippedSubviews: true,
     groupTypes: 'SavedPhotos',
     maximum: 15,
-    imagesPerRow: 3,
-    imageMargin: 5,
+    imagesPerRow: 6,
+    imageMargin: 4,
+    first: 50,
     selectSingleItem: false,
     assetType: 'Photos',
     backgroundColor: 'white',
@@ -94,7 +60,6 @@ class CameraRollPicker extends Component<
       // tslint:disable-next-line:no-console
       console.log(selectedImages);
     },
-    emptyText: 'No photos.',
   };
   after: string | undefined;
   constructor(props: CameraRollPickerProps) {
@@ -102,13 +67,6 @@ class CameraRollPicker extends Component<
     this.state = {
       images: [],
       selected: this.props.selected,
-      lastCursor: null,
-      initialLoading: true,
-      loadingMore: false,
-      noMore: false,
-      // dataSource: new ListView.DataSource({
-      //   rowHasChanged: (r1, r2) => r1 !== r2,
-      // }),
     };
   }
 
@@ -120,20 +78,24 @@ class CameraRollPicker extends Component<
 
   onFetch = async (_ = 1, startFetch: any, abortFetch: () => void) => {
     try {
-      const first = 60;
+      const {
+        assetType,
+        groupTypes,
+        first,
+        groupName,
+        mimeTypes,
+      } = this.props;
 
       const res = await CameraRoll.getPhotos({
         first,
         after: this.after,
-        // tslint:disable-next-line:no-console
+        assetType: assetType,
+        groupTypes: groupTypes,
+        groupName,
+        mimeTypes,
       });
       if (res) {
-        if (__DEV__) {
-          // tslint:disable-next-line:no-console
-          console.log(res);
-        }
-
-        const data = res.edges; // .map(r => r.node.image);
+        const data = res.edges;
         if (res.page_info) {
           this.after = res.page_info.has_next_page
             ? res.page_info.end_cursor
@@ -149,24 +111,6 @@ class CameraRollPicker extends Component<
       abortFetch(); // manually stop the refresh or pagination if it encounters network error
     }
   };
-  _appendImages(data: GetPhotosReturnType) {
-    const assets = data.edges;
-    const newState: any = {
-      loadingMore: false,
-      initialLoading: false,
-    };
-    if (!data.page_info.has_next_page) {
-      newState.noMore = true;
-    }
-    if (assets.length > 0) {
-      newState.lastCursor = data.page_info.end_cursor;
-      newState.images = this.state.images.concat(assets);
-      newState.dataSource = this.state.dataSource.cloneWithRows(
-        this._nEveryRow(newState.images, this.props.imagesPerRow),
-      );
-    }
-    this.setState(newState);
-  }
   render() {
     const { imageMargin, backgroundColor, imagesPerRow } = this.props;
 
@@ -214,7 +158,7 @@ class CameraRollPicker extends Component<
         onPress={this._selectImage.bind(this)}
       />
     );
-  }
+  };
 
   _selectImage(image: { uri: any }) {
     const { maximum, callback, selectSingleItem } = this.props;
diff --git a/components/image-picker/ImageRoll.tsx b/components/image-picker/ImageRoll.tsx
index 6909dc81d..d2137031f 100644
--- a/components/image-picker/ImageRoll.tsx
+++ b/components/image-picker/ImageRoll.tsx
@@ -42,8 +42,8 @@ const styles = StyleSheet.create({
 
 export default class ImageRoll extends React.Component<ImageRollProps, any> {
   static defaultProps = {
-    title: 'Photos',
-    cancelText: 'Cancel',
+    title: '图片',
+    cancelText: '取消',
     cameraPickerProps: {},
   };
   onSelected = (images: any[], _: any) => {
@@ -73,7 +73,6 @@ export default class ImageRoll extends React.Component<ImageRollProps, any> {
             selected={[]}
             callback={this.onSelected}
             maximum={1}
-            imagesPerRow={4}
             {...cameraPickerProps}
           />
         </View>