moparisthebest/open-keychain
1
0
Fork 0
mirror of https://github.com/moparisthebest/open-keychain synced 2024-11-24 01:32:16 -05:00
Code Issues Releases Wiki Activity

move fingerprint coloring into helper

Browse Source
This commit is contained in:
Vincent Breitmoser 2014-03-15 02:20:28 +01:00
parent efab1d27ac
commit 0922a8cf04
3 changed files with 64 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java
View File

@ -17,7 +17,12 @@
package org.sufficientlysecure.keychain.helper;
import android.graphics.Color;
import android.os.Bundle;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.style.ForegroundColorSpan;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.util.Log;
@ -60,6 +65,63 @@ public class OtherHelper {
}
}
public static SpannableStringBuilder colorizeFingerprint(String fingerprint) {
SpannableStringBuilder sb = new SpannableStringBuilder(fingerprint);
try {
// for each 4 characters of the fingerprint + 1 space
for (int i = 0; i < fingerprint.length(); i += 5) {
int spanEnd = Math.min(i + 4, fingerprint.length());
String fourChars = fingerprint.substring(i, spanEnd);
int raw = Integer.parseInt(fourChars, 16);
byte[] bytes = {(byte) ((raw >> 8) & 0xff - 128), (byte) (raw & 0xff - 128)};
int[] color = OtherHelper.getRgbForData(bytes);
int r = color[0];
int g = color[1];
int b = color[2];
// we cannot change black by multiplication, so adjust it to an almost-black grey,
// which will then be brightened to the minimal brightness level
if (r == 0 && g == 0 && b == 0) {
r = 1;
g = 1;
b = 1;
}
// Convert rgb to brightness
double brightness = 0.2126 * r + 0.7152 * g + 0.0722 * b;
// If a color is too dark to be seen on black,
// then brighten it up to a minimal brightness.
if (brightness < 80) {
double factor = 80.0 / brightness;
r = Math.min(255, (int) (r * factor));
g = Math.min(255, (int) (g * factor));
b = Math.min(255, (int) (b * factor));
// If it is too light, then darken it to a respective maximal brightness.
} else if (brightness > 180) {
double factor = 180.0 / brightness;
r = (int) (r * factor);
g = (int) (g * factor);
b = (int) (b * factor);
}
// Create a foreground color with the 3 digest integers as RGB
// and then converting that int to hex to use as a color
sb.setSpan(new ForegroundColorSpan(Color.rgb(r, g, b)),
i, spanEnd, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
}
} catch (Exception e) {
Log.e(Constants.TAG, "Colorization failed", e);
// if anything goes wrong, then just display the fingerprint without colour,
// instead of partially correct colour or wrong colours
return new SpannableStringBuilder(fingerprint);
}
return sb;
}
/**
* Converts the given bytes to a unique RGB color using SHA1 algorithm
*

1
OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/CertifyKeyActivity.java
View File

@ -35,6 +35,7 @@ import org.spongycastle.openpgp.PGPPublicKeyRing;
import org.spongycastle.openpgp.PGPSignature;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.helper.OtherHelper;
import org.sufficientlysecure.keychain.helper.Preferences;
import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;

62
OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyMainFragment.java
View File

@ -26,10 +26,7 @@ import android.support.v4.app.Fragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.format.DateFormat;
import android.text.style.ForegroundColorSpan;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
@ -303,7 +300,7 @@ public class ViewKeyMainFragment extends Fragment implements
}
String fingerprint = PgpKeyHelper.convertFingerprintToHex(fingerprintBlob, true);
mFingerprint.setText(colorizeFingerprint(fingerprint));
mFingerprint.setText(OtherHelper.colorizeFingerprint(fingerprint));
}
mKeysAdapter.swapCursor(data);
@ -314,63 +311,6 @@ public class ViewKeyMainFragment extends Fragment implements
}
}
private SpannableStringBuilder colorizeFingerprint(String fingerprint) {
SpannableStringBuilder sb = new SpannableStringBuilder(fingerprint);
try {
// for each 4 characters of the fingerprint + 1 space
for (int i = 0; i < fingerprint.length(); i += 5) {
int spanEnd = Math.min(i + 4, fingerprint.length());
String fourChars = fingerprint.substring(i, spanEnd);
int raw = Integer.parseInt(fourChars, 16);
byte[] bytes = {(byte) ((raw >> 8) & 0xff - 128), (byte) (raw & 0xff - 128)};
int[] color = OtherHelper.getRgbForData(bytes);
int r = color[0];
int g = color[1];
int b = color[2];
// we cannot change black by multiplication, so adjust it to an almost-black grey,
// which will then be brightened to the minimal brightness level
if (r == 0 && g == 0 && b == 0) {
r = 1;
g = 1;
b = 1;
}
// Convert rgb to brightness
double brightness = 0.2126 * r + 0.7152 * g + 0.0722 * b;
// If a color is too dark to be seen on black,
// then brighten it up to a minimal brightness.
if (brightness < 80) {
double factor = 80.0 / brightness;
r = Math.min(255, (int) (r * factor));
g = Math.min(255, (int) (g * factor));
b = Math.min(255, (int) (b * factor));
// If it is too light, then darken it to a respective maximal brightness.
} else if (brightness > 180) {
double factor = 180.0 / brightness;
r = (int) (r * factor);
g = (int) (g * factor);
b = (int) (b * factor);
}
// Create a foreground color with the 3 digest integers as RGB
// and then converting that int to hex to use as a color
sb.setSpan(new ForegroundColorSpan(Color.rgb(r, g, b)),
i, spanEnd, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
}
} catch (Exception e) {
Log.e(Constants.TAG, "Colorization failed", e);
// if anything goes wrong, then just display the fingerprint without colour,
// instead of partially correct colour or wrong colours
return new SpannableStringBuilder(fingerprint);
}
return sb;
}
/**
* This is called when the last Cursor provided to onLoadFinished() above is about to be closed.
* We need to make sure we are no longer using it.