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Preferences
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4 files changed

+188
-5
lines changed

‎App/App.csproj‎

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@@ -54,6 +54,8 @@
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<Reference Include="System" />
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<Reference Include="System.Core" />
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<Reference Include="Xamarin.Mac" />
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<Reference Include="Mono.Data.Sqlite" />
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<Reference Include="System.Data" />
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</ItemGroup>
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<ItemGroup>
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<ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Contents.json" />
@@ -96,6 +98,7 @@
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<Compile Include="ListViewCell.designer.cs">
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<DependentUpon>ListViewCell.cs</DependentUpon>
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</Compile>
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<Compile Include="Preferences.cs" />
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</ItemGroup>
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<ItemGroup>
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<InterfaceDefinition Include="Main.storyboard" />

‎App/Main.storyboard‎

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<?xml version="1.0" encoding="UTF-8"?>
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<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="11762" systemVersion="16D32" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" initialViewController="B8D-0N-5wS">
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<dependencies>
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<deployment identifier="macosx"/>
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<plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="11762"/>
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<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
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<capability name="stacking Non-gravity area distributions on NSStackView" minToolsVersion="7.0" minSystemVersion="10.11"/>

‎App/Preferences.cs‎

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using System;
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using System.Data;
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using System.IO;
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using Mono.Data.Sqlite;
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namespace SharpCpp
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{
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/// <summary>
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/// Very simplified preferences, just to store key/value pairs of strings.
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/// </summary>
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public static class Preferences
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{
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public const string AppName = "SharpCppApp";
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static readonly DbHelper _dbHelper;
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static readonly PreferencesDbHelper _preferencesDbHelper;
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static Preferences()
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{
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_dbHelper = new DbHelper();
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_preferencesDbHelper = new PreferencesDbHelper(_dbHelper);
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}
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class PreferencesDbHelper
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{
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const string TableName = "Preferences";
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const string IdColumn = "id";
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const string ValueColumn = "value";
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readonly DbHelper DbHelper;
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internal PreferencesDbHelper(DbHelper dbHelper)
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{
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DbHelper = dbHelper;
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CreateTableIfNone();
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}
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void CreateTableIfNone()
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{
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using (var connection = DbHelper.CreateDbConnection()) {
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connection.Open();
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var command = "create table if not exists " +
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$"{ TableName } (" +
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$" { IdColumn } text primary key, " +
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$" { ValueColumn } text" +
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")";
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using (var c = connection.CreateCommand()) {
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c.CommandText = command;
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c.CommandType = CommandType.Text;
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c.ExecuteNonQuery();
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}
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connection.Close();
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}
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}
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public string GetValue(string key)
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{
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string value = null;
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using (var connection = _dbHelper.CreateDbConnection()) {
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connection.Open();
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using (var command = connection.CreateCommand()) {
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command.CommandText = $"SELECT {ValueColumn} FROM [{TableName}] WHERE {IdColumn}=@id";
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command.Parameters.AddWithValue("@id", key);
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using (var reader = command.ExecuteReader()) {
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while (reader.Read()) {
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value = (string)reader[0];
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}
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}
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}
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connection.Close();
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}
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return value;
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}
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public void PutValue(string key, string value)
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{
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using (var connection = _dbHelper.CreateDbConnection()) {
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connection.Open();
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// insert or ignore
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using (var command = connection.CreateCommand()) {
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command.CommandText = $"INSERT OR IGNORE INTO [{TableName}] ({IdColumn}, {ValueColumn}) " +
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"VALUES (@id, @value)";
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command.Parameters.AddWithValue("@id", key);
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command.Parameters.AddWithValue("@value", value);
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command.ExecuteNonQuery();
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}
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// update
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using (var command = connection.CreateCommand()) {
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command.CommandText = $"UPDATE {TableName} SET {ValueColumn}=@value WHERE {IdColumn}=@id";
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command.Parameters.AddWithValue("@id", key);
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command.Parameters.AddWithValue("@value", value);
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command.ExecuteNonQuery();
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}
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connection.Close();
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}
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}
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}
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class DbHelper
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{
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const string DbName = "SharpCppApp.db";
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readonly string _dbFile;
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internal DbHelper()
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{
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_dbFile = CreateDbIfNone();
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}
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string CreateDbIfNone()
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{
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string dbFile;
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var documents = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
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var appDirectory = Path.Combine(documents, AppName);
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if (!Directory.Exists(appDirectory)) {
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Directory.CreateDirectory(appDirectory);
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}
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dbFile = Path.Combine(appDirectory, DbName);
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if (!File.Exists(dbFile)) {
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SqliteConnection.CreateFile(dbFile);
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}
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return dbFile;
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}
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public SqliteConnection CreateDbConnection()
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{
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return new SqliteConnection("Data Source=" + _dbFile);
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}
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}
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#region LastSelectedFilename
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const string LastSelectedFilenameKey = "last_selected_filename";
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// cached
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static string _selectedFilename;
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static bool _selectedFilenameLazyLoaded;
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public static string LastSelectedFilename {
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get {
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if (!_selectedFilenameLazyLoaded) {
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_selectedFilename = _preferencesDbHelper.GetValue(LastSelectedFilenameKey);
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_selectedFilenameLazyLoaded = true;
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}
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return _selectedFilename;
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}
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set {
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_selectedFilename = value;
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_preferencesDbHelper.PutValue(LastSelectedFilenameKey, value);
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}
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}
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#endregion
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}
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}

‎App/ViewController.cs‎

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@@ -65,7 +65,6 @@ public ViewController(IntPtr handle) : base(handle)
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}
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TVDataSource _tvDataSource;
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string _selectedFilename;
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public override void ViewDidLoad()
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{
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try {
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// with same name
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UpdateGeneratedFileViews(files.Single((arg) => arg.ToString() == _selectedFilename));
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UpdateGeneratedFileViews(files.Single((arg) => arg.ToString() == Preferences.LastSelectedFilename));
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} catch (InvalidOperationException) {
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// firs in the list
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UpdateGeneratedFileViews(files[0]);
@@ -148,10 +147,10 @@ void UpdateGeneratedFileViews(TFile file)
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_tvDataSource.UpdateSelectedPosition(file);
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150149
if (file == null) {
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_selectedFilename = null;
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Preferences.LastSelectedFilename = null;
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GeneratedFileContent.Value = null;
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} else {
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_selectedFilename = file.ToString();
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Preferences.LastSelectedFilename = file.ToString();
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GeneratedFileContent.Value = file.Content;
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}
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}

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