9adb4a78a6
The main purpose of this PR is to make it so that when you set the initial route and it's a hierarchical route (e.g. `/a/b/c`), it implies multiple pushes, one for each step of the route (so in that case, `/`, `/a`, `/a/b`, and `/a/b/c`, in that order). If any of those routes don't exist, it falls back to '/'. As part of doing that, I: * Changed the default for MaterialApp.initialRoute to honor the actual initial route. * Added a MaterialApp.onUnknownRoute for handling bad routes. * Added a feature to flutter_driver that allows the host test script and the device test app to communicate. * Added a test to make sure `flutter drive --route` works. (Hopefully that will also prove `flutter run --route` works, though this isn't testing the `flutter` tool's side of that. My main concern is over whether the engine side works.) * Fixed `flutter drive` to output the right target file name. * Changed how the stocks app represents its data, so that we can show a page for a stock before we know if it exists. * Made it possible to show a stock page that doesn't exist. It shows a progress indicator if we're loading the data, or else shows a message saying it doesn't exist. * Changed the pathing structure of routes in stocks to work more sanely. * Made search in the stocks app actually work (before it only worked if we happened to accidentally trigger a rebuild). Added a test. * Replaced some custom code in the stocks app with a BackButton. * Added a "color" feature to BackButton to support the stocks use case. * Spaced out the ErrorWidget text a bit more. * Added `RouteSettings.copyWith`, which I ended up not using. * Improved the error messages around routing. While I was in some files I made a few formatting fixes, fixed some code health issues, and also removed `flaky: true` from some devicelab tests that have been stable for a while. Also added some documentation here and there.
103 lines
2.6 KiB
Dart
103 lines
2.6 KiB
Dart
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Snapshot from http://www.nasdaq.com/screening/company-list.aspx
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// Fetched 2/23/2014.
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// "Symbol","Name","LastSale","MarketCap","IPOyear","Sector","industry","Summary Quote",
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// Data in stock_data.json
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import 'dart:convert';
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import 'dart:math' as math;
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import 'package:flutter/foundation.dart';
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import 'package:flutter/services.dart';
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import 'package:http/http.dart' as http;
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final math.Random _rng = new math.Random();
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class Stock {
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String symbol;
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String name;
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double lastSale;
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String marketCap;
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double percentChange;
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Stock(this.symbol, this.name, this.lastSale, this.marketCap, this.percentChange);
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Stock.fromFields(List<String> fields) {
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// FIXME: This class should only have static data, not lastSale, etc.
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// "Symbol","Name","LastSale","MarketCap","IPOyear","Sector","industry","Summary Quote",
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lastSale = 0.0;
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try{
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lastSale = double.parse(fields[2]);
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} catch(_) {}
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symbol = fields[0];
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name = fields[1];
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marketCap = fields[4];
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percentChange = (_rng.nextDouble() * 20) - 10;
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}
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}
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class StockData extends ChangeNotifier {
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StockData() {
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if (actuallyFetchData) {
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_httpClient = createHttpClient();
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_fetchNextChunk();
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}
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}
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final List<String> _symbols = <String>[];
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final Map<String, Stock> _stocks = <String, Stock>{};
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Iterable<String> get allSymbols => _symbols;
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Stock operator [](String symbol) => _stocks[symbol];
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bool get loading => _httpClient != null;
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void add(List<List<String>> data) {
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for (List<String> fields in data) {
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final Stock stock = new Stock.fromFields(fields);
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_symbols.add(stock.symbol);
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_stocks[stock.symbol] = stock;
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}
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_symbols.sort();
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notifyListeners();
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}
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static const int _kChunkCount = 30;
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int _nextChunk = 0;
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String _urlToFetch(int chunk) {
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return 'https://domokit.github.io/examples/stocks/data/stock_data_$chunk.json';
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}
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http.Client _httpClient;
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static bool actuallyFetchData = true;
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void _fetchNextChunk() {
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_httpClient.get(_urlToFetch(_nextChunk++)).then<Null>((http.Response response) {
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final String json = response.body;
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if (json == null) {
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debugPrint('Failed to load stock data chunk ${_nextChunk - 1}');
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_end();
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return;
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}
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final JsonDecoder decoder = const JsonDecoder();
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add(decoder.convert(json));
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if (_nextChunk < _kChunkCount) {
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_fetchNextChunk();
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} else {
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_end();
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}
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});
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}
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void _end() {
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_httpClient?.close();
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_httpClient = null;
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}
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}
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