Replace char numbers after specific char

Question

I am creating an application that converts text to braille. Converting to braille is not a problem, but I do not know how to convert it.

Example 1: Converting Numbers to Braille

1 = #a 123 = #abc 12 45 = #ab #de 

Example 2: Converting Capitals to Braille

 Jonas = ,jonas JONAS = ,,jonas 

I have a problem converting braille to normal. I cannot just convert all a to 1 and so on. The numbers can be checked with # , and then change the characters after it to the next space, but I don't know how to do it. The comma before the letter is more difficult to separate the text from other commas.

Here is my class for converting to braille:

 using System; using System.Collections.Generic; using System.Text; using System.Drawing; namespace BrailleConverter { class convertingBraille { public Font getIndexBrailleFont() { return new Font("Index Braille Font", (float)28.5, FontStyle.Regular); } public Font getPrintableFontToEmbosser() { return new Font("Lucida Console", (float)28.5, FontStyle.Regular); //return new Font("Index Black Text Font", (float)28.5, FontStyle.Regular); } public string convertCapitalsToUnderscore(string text) { if (string.IsNullOrEmpty(text)) { return ""; } text = " " + text; text = text.Replace('.', '\''); text = text.Replace(',', '1'); text = text.Replace('?', '5'); text = text.Replace('!', '6'); text = text.Replace(':', '3'); text = text.Replace('=', '7'); text = text.Replace('+', '4'); text = text.Replace('*', '9'); text = text.Replace('é', '='); StringBuilder newText = new StringBuilder(text.Length * 2); newText.Append(text[0]); bool firstCapLetterInWord = true; for (int i = 1; i < text.Length; i++) { char letter = text[i]; // Aktuell bokstav char nextLetter = ' '; // Nästa bokstav try { nextLetter = text[i + 1]; } catch { } // Är det stor bokstav? if (char.IsUpper(letter)) { // Är nästa bokstav stor? if (char.IsUpper(nextLetter)) { // Är det början av ett helt ord med caps? if (firstCapLetterInWord) { newText.Append(",,"); // 2 st understräck framför ordet firstCapLetterInWord = false; // Ändra så att inte nästa bokstav får 2 st understräck } } else // Annars bara ett understräck { if (firstCapLetterInWord) { newText.Append(","); // Sätt understräck framför bokstav } firstCapLetterInWord = true; // Förbereda för nästa capsord } } newText.Append(text[i]); } string finishedText = newText.ToString().TrimStart(); // Ta bort mellanslaget i början finishedText = finishedText.ToLower(); finishedText = finishedText.Replace('å', '*'); finishedText = finishedText.Replace('ä', '>'); finishedText = finishedText.Replace('ö', '['); return finishedText; } public string convertNumbersToBrailleNumbers(string text) { if (string.IsNullOrEmpty(text)) { return ""; } text = " " + text; StringBuilder newText = new StringBuilder(text.Length * 2); newText.Append(text[0]); bool firstNumberInNumber = true; for (int i = 1; i < text.Length; i++) { char letter = text[i]; // Aktuell tecken char nextLetter = ' '; // Nästa tecken try { nextLetter = text[i + 1]; } catch { } char convertedChar = text[i]; // Är tecknet en siffra? if (char.IsNumber(letter)) { // Är nästa tecken en siffra? if (char.IsNumber(nextLetter)) { // Är det början av ett flertaligt nummer? if (firstNumberInNumber) { newText.Append('#'); // Brädkors framför nummret firstNumberInNumber = false; // Ändra så att inte nästa siffra får brädkors } } else // Annars bara ett understräck { if (firstNumberInNumber) { newText.Append('#'); // Sätt brädkors framför siffran } firstNumberInNumber = true; // Förbereda för nästa flertaliga nummer } } newText.Append(convertedChar); } string finishedText = newText.ToString().TrimStart(); finishedText = finishedText.Replace('1', 'a'); finishedText = finishedText.Replace('2', 'b'); finishedText = finishedText.Replace('3', 'c'); finishedText = finishedText.Replace('4', 'd'); finishedText = finishedText.Replace('5', 'e'); finishedText = finishedText.Replace('6', 'f'); finishedText = finishedText.Replace('7', 'g'); finishedText = finishedText.Replace('8', 'h'); finishedText = finishedText.Replace('9', 'i'); finishedText = finishedText.Replace('0', 'j'); return finishedText; } public string convertBackToPrint(string oldText) { string newText = oldText.Replace(",", ""); newText = newText.Replace("#", ""); newText = newText.Replace("*", "å"); newText = newText.Replace(">", "ä"); newText = newText.Replace("[", "ö"); newText = newText.Replace('\'', '.'); newText = newText.Replace('1', ','); newText = newText.Replace('5', '?'); newText = newText.Replace('6', '!'); newText = newText.Replace('3', ':'); newText = newText.Replace('7', '='); newText = newText.Replace('4', '+'); newText = newText.Replace('9', '*'); newText = newText.Replace('=', 'é'); return newText; } } } 

Answer 1

Thinking about this, perhaps what you really want to do is implement your own encoding called somthing like PrintableSwedishBrailleAsciiEncoding , which inherits the base class from Encoding .

 using System.Text; public sealed PrintableSwedishBrailleAsciiEncoding : Encoding { ... } 

This will maximize the profitability of your code and allow you to simply use the rest of the framework to do your work.

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In response to your comment on my deleted answer, I think you are asking

How can I replace a specific character, followed by any number of characters without spaces, up to the first char space. Or, in a more general sense, whole words starting with a certain character?

So, you could use Regex something like this, I think it would match # , followed by a few non-white space characters.

 var numberMatcher = new Regex(@"#\w+") var firstMatch = numberMatcher.Match(yourText) var alteredMatch = SomeTextAlteringFunction(firstMatch); var yourNewText = numberMatcher.Replace(yourText, alteredMatch); 

Answer 2

That was my decision (Thanks a lot to Jodrell)

  public string convertBackToPrint(string oldText) { string newText = oldText.Replace(",", ""); newText = newText.Replace("*", "å"); newText = newText.Replace(">", "ä"); newText = newText.Replace("[", "ö"); newText = newText.Replace('\'', '.'); newText = newText.Replace('1', ','); newText = newText.Replace('5', '?'); newText = newText.Replace('6', '!'); newText = newText.Replace('3', ':'); newText = newText.Replace('7', '='); newText = newText.Replace('4', '+'); newText = newText.Replace('9', '*'); newText = newText.Replace('=', 'é'); var numberMatcher = new Regex(@"#\w+"); var firstMatch = numberMatcher.Match(newText); string alteredMatch = convertToNum(firstMatch.ToString()); string yourNewText = numberMatcher.Replace(newText, alteredMatch); return yourNewText; } private string convertToNum(string oldText) { string newText = ""; newText = oldText.Replace("a", "1"); newText = newText.Replace("b", "2"); newText = newText.Replace("c", "3"); newText = newText.Replace("d", "4"); newText = newText.Replace("e", "5"); newText = newText.Replace("f", "6"); newText = newText.Replace("g", "7"); newText = newText.Replace("h", "8"); newText = newText.Replace("i", "9"); newText = newText.Replace("j", "0"); newText = newText.Replace("#", ""); return newText; }