mirror of
https://github.com/fadden/6502bench.git
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180 lines
6.4 KiB
C#
180 lines
6.4 KiB
C#
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/*
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* Copyright 2021 faddenSoft
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Web.Script.Serialization;
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using System.Windows.Media.Imaging;
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namespace SourceGen {
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/// <summary>
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/// Holds the collection of daily tips and associated images.
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/// </summary>
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public class DailyTips {
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private static string TIPS_FILE = "daily-tips.json";
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private static string TIPS_DIR = "Tips";
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/// <summary>
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/// A tip is a text string with an optional bitmap.
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/// </summary>
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public class Tip {
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public string Text { get; private set; }
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public string ImageFileName { get; private set; }
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public BitmapSource Bitmap { get; }
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public Tip(string text, string imageFileName) {
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Text = text;
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ImageFileName = imageFileName;
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if (!string.IsNullOrEmpty(imageFileName)) {
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Bitmap = LoadImage(imageFileName);
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}
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}
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private static BitmapSource LoadImage(string fileName) {
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string pathName = RuntimeDataAccess.GetPathName(TIPS_DIR);
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pathName = Path.Combine(pathName, fileName);
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try {
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BitmapImage bitmap = new BitmapImage();
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bitmap.BeginInit();
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bitmap.UriSource = new Uri(pathName);
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bitmap.CacheOption = BitmapCacheOption.OnLoad; // don't hold file open
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bitmap.EndInit();
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return bitmap;
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} catch (Exception ex) {
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Debug.WriteLine("Unable to load bitmap '" + fileName + "': " + ex);
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return null;
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}
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}
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private static BitmapSource LoadImage1(string fileName) {
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string pathName = RuntimeDataAccess.GetPathName(TIPS_DIR);
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pathName = Path.Combine(pathName, fileName);
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try {
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// From "How to: Encode and Decode a PNG Image".
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// Note: this holds the file open (try deleting the file).
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BitmapSource bitmapSource;
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Stream imageStreamSource = new FileStream(pathName, FileMode.Open,
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FileAccess.Read, FileShare.Read);
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PngBitmapDecoder decoder = new PngBitmapDecoder(imageStreamSource,
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BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
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bitmapSource = decoder.Frames[0];
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//imageStreamSource.Dispose(); // image becomes blank
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return bitmapSource;
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} catch (IOException ex) {
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Debug.WriteLine("Unable to load image '" + fileName + "': " + ex);
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return null;
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}
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}
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}
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/// <summary>
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/// List of tips.
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/// </summary>
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private List<Tip> mTips = new List<Tip>();
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public DailyTips() { }
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/// <summary>
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/// Loads the list of tips. The list will always have at least one element.
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/// </summary>
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public bool Load() {
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mTips.Clear();
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if (!DoLoadTips()) {
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mTips.Add(new Tip(Res.Strings.TIPS_NOT_AVAILABLE, null));
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return false;
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} else {
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Debug.WriteLine("Loaded " + mTips.Count + " tips");
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return true;
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}
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}
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public int DailyNumber {
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get {
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// We show a different tip every day by taking the day-of-year value and
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// modding it by the number of tips we have. Doesn't do the right thing
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// at the end of year transition, but everybody is off partying anyway.
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if (mTips.Count > 0) {
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int doy = DateTime.Now.DayOfYear;
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return doy % mTips.Count;
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} else {
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return 0;
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}
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}
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}
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public int Count { get { return mTips.Count; } }
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/// <summary>
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/// Returns the Nth tip.
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/// </summary>
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public Tip Get(int index) {
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if (mTips.Count == 0) {
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// Load tips, or at least generate a "not available" entry.
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Load();
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}
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if (index < 0 || index >= mTips.Count) {
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Debug.WriteLine("Invalid request for tip " + index);
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return mTips[0];
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}
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return mTips[index];
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}
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[Serializable]
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internal class SerTip {
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public string Text { get; set; }
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public string Image { get; set; }
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}
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internal class SerTipFile {
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public List<SerTip> Tips { get; set; }
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}
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private bool DoLoadTips() {
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string pathName = RuntimeDataAccess.GetPathName(TIPS_DIR);
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pathName = Path.Combine(pathName, TIPS_FILE);
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string cereal;
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try {
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cereal = File.ReadAllText(pathName);
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} catch (IOException ex) {
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Debug.WriteLine("Failed reading tip file '" + pathName + "': " + ex.Message);
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return false;
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}
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JavaScriptSerializer ser = new JavaScriptSerializer();
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SerTipFile tipFile;
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try {
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tipFile = ser.Deserialize<SerTipFile>(cereal);
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} catch (Exception ex) {
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Debug.WriteLine("Failed deserializing tip JSON: " + ex.Message);
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return false;
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}
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if (tipFile == null) {
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Debug.WriteLine("Failed to find tip list");
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return false;
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}
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foreach (SerTip serTip in tipFile.Tips) {
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mTips.Add(new Tip(serTip.Text, serTip.Image));
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}
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return true;
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}
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}
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}
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