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* Adding some other tasks and tinkering with better wpf for tasks screen * Updating verbiage in Pause control to make it more clear * stylecop updates * trying improved styling with the readme * really better to remove the styling on the readme * adding Telemetry service to list of things one can disable * creating signed dlls and prepping for 4.4 release * updating readme Co-authored-by: weredev <gitlab@weredev.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Globalization; | ||
| using System.Linq; | ||
| using System.Windows.Data; | ||
|
|
||
| namespace WereDev.Utils.Wu10Man.Converters | ||
| { | ||
| // Does a math equation on the bound value. | ||
| // Use @VALUE in your mathEquation as a substitute for bound value | ||
| // Operator order is parenthesis first, then Left-To-Right (no operator precedence) | ||
| // https://rachel53461.wordpress.com/2011/08/20/the-math-converter/ | ||
| public class MathConverter : IValueConverter | ||
| { | ||
| private static readonly char[] _allOperators = new[] { '+', '-', '*', '/', '%', '(', ')' }; | ||
|
|
||
| private static readonly List<string> _grouping = new List<string> { "(", ")" }; | ||
| private static readonly List<string> _operators = new List<string> { "+", "-", "*", "/", "%" }; | ||
|
|
||
| public object Convert(object value, Type targetType, object parameter, CultureInfo culture) | ||
| { | ||
| // Parse value into equation and remove spaces | ||
| var mathEquation = parameter as string; | ||
| mathEquation = mathEquation.Replace(" ", string.Empty); | ||
| mathEquation = mathEquation.Replace("@VALUE", value?.ToString() ?? string.Empty); | ||
|
|
||
| // Validate values and get list of numbers in equation | ||
| var numbers = new List<double>(); | ||
| foreach (string s in mathEquation.Split(_allOperators)) | ||
| { | ||
| if (!string.IsNullOrEmpty(s)) | ||
| { | ||
| if (double.TryParse(s, out var tmp)) | ||
| { | ||
| numbers.Add(tmp); | ||
| } | ||
| else | ||
| { | ||
| // Handle Error - Some non-numeric, operator, or grouping character found in string | ||
| throw new InvalidCastException(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Begin parsing method | ||
| EvaluateMathString(ref mathEquation, ref numbers, 0); | ||
|
|
||
| // After parsing the numbers list should only have one value - the total | ||
| return numbers[0]; | ||
| } | ||
|
|
||
| public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) | ||
| { | ||
| throw new NotImplementedException(); | ||
| } | ||
|
|
||
| // Evaluates a mathematical string and keeps track of the results in a List<double> of numbers | ||
| private void EvaluateMathString(ref string mathEquation, ref List<double> numbers, int index) | ||
| { | ||
| // Loop through each mathemtaical token in the equation | ||
| string token = GetNextToken(mathEquation); | ||
|
|
||
| while (!string.IsNullOrEmpty(token)) | ||
| { | ||
| // Remove token from mathEquation | ||
| mathEquation = mathEquation.Remove(0, token.Length); | ||
|
|
||
| // If token is a grouping character, it affects program flow | ||
| if (_grouping.Contains(token)) | ||
| { | ||
| switch (token) | ||
| { | ||
| case "(": | ||
| EvaluateMathString(ref mathEquation, ref numbers, index); | ||
| break; | ||
|
|
||
| case ")": | ||
| return; | ||
| } | ||
| } | ||
|
|
||
| // If token is an operator, do requested operation | ||
| if (_operators.Contains(token)) | ||
| { | ||
| // If next token after operator is a parenthesis, call method recursively | ||
| string nextToken = GetNextToken(mathEquation); | ||
| if (nextToken == "(") | ||
| { | ||
| EvaluateMathString(ref mathEquation, ref numbers, index + 1); | ||
| } | ||
|
|
||
| // Verify that enough numbers exist in the List<double> to complete the operation | ||
| // and that the next token is either the number expected, or it was a ( meaning | ||
| // that this was called recursively and that the number changed | ||
| if (numbers.Count > (index + 1) && | ||
| (double.Parse(nextToken) == numbers[index + 1] || nextToken == "(")) | ||
| { | ||
| switch (token) | ||
| { | ||
| case "+": | ||
| numbers[index] = numbers[index] + numbers[index + 1]; | ||
| break; | ||
| case "-": | ||
| numbers[index] = numbers[index] - numbers[index + 1]; | ||
| break; | ||
| case "*": | ||
| numbers[index] = numbers[index] * numbers[index + 1]; | ||
| break; | ||
| case "/": | ||
| numbers[index] = numbers[index] / numbers[index + 1]; | ||
| break; | ||
| case "%": | ||
| numbers[index] = numbers[index] % numbers[index + 1]; | ||
| break; | ||
| } | ||
|
|
||
| numbers.RemoveAt(index + 1); | ||
| } | ||
| else | ||
| { | ||
| // Handle Error - Next token is not the expected number | ||
| throw new FormatException("Next token is not the expected number"); | ||
| } | ||
| } | ||
|
|
||
| token = GetNextToken(mathEquation); | ||
| } | ||
| } | ||
|
|
||
| // Gets the next mathematical token in the equation | ||
| private string GetNextToken(string mathEquation) | ||
| { | ||
| // If we're at the end of the equation, return string.empty | ||
| if (string.IsNullOrEmpty(mathEquation)) | ||
| { | ||
| return string.Empty; | ||
| } | ||
|
|
||
| // Get next operator or numeric value in equation and return it | ||
| string tmp = string.Empty; | ||
| foreach (char c in mathEquation) | ||
| { | ||
| if (_allOperators.Contains(c)) | ||
| { | ||
| return string.IsNullOrEmpty(tmp) ? c.ToString() : tmp; | ||
| } | ||
| else | ||
| { | ||
| tmp += c; | ||
| } | ||
| } | ||
|
|
||
| return tmp; | ||
| } | ||
| } | ||
| } |
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