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popping characters captcha: don't show prev char for the first char

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Signed-off-by: hrj <harshad.rj@gmail.com>
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hrj
2021-04-24 22:36:25 +05:30
parent e3241ff7ac
commit 1a41724fdc
1 changed files with 5 additions and 3 deletions
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4
src/main/java/lc/captchas/PoppingCharactersCaptcha.java
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@@ -65,10 +65,12 @@ public class PoppingCharactersCaptcha implements ChallengeProvider {
final var prevColor = Color.getHSBColor(0f, 0f, 0.1f); final var prevColor = Color.getHSBColor(0f, 0f, 0.1f);
IntStream.range(0, text.length()).forEach(i -> { IntStream.range(0, text.length()).forEach(i -> {
final var color = Color.getHSBColor(HelperFunctions.randomNumber(0, 100)/100.0f, 0.6f, 1.0f); final var color = Color.getHSBColor(HelperFunctions.randomNumber(0, 100)/100.0f, 0.6f, 1.0f);
final var prevI = (i - 1 + text.length()) % text.length();
final var nextImage = makeImage((g) -> { final var nextImage = makeImage((g) -> {
if (i > 0) {
final var prevI = (i - 1) % text.length();
g.setColor(prevColor); g.setColor(prevColor);
g.drawString(String.valueOf(text.charAt(prevI)), advances[prevI] + jitter(), 45 + jitter()); g.drawString(String.valueOf(text.charAt(prevI)), advances[prevI] + jitter(), 45 + jitter());
}
g.setColor(color); g.setColor(color);
g.drawString(String.valueOf(text.charAt(i)), advances[i] + jitter(), 45 + jitter()); g.drawString(String.valueOf(text.charAt(i)), advances[i] + jitter(), 45 + jitter());
}); });