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Merge pull request #2783 from u7683648/refactor/convert-letterbitmap-to-kotlin
refactor: Convert LetterBitmap to Kotlin
This commit is contained in:
Sylvia van Os
@@ -1,140 +0,0 @@
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package protect.card_locker;
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import android.content.Context;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Paint;
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import android.graphics.Rect;
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import android.graphics.Typeface;
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import android.text.TextPaint;
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import android.util.Log;
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import androidx.core.graphics.PaintCompat;
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/**
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* Original from https://github.com/andOTP/andOTP/blob/master/app/src/main/java/org/shadowice/flocke/andotp/Utilities/LetterBitmap.java
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* which was originally from http://stackoverflow.com/questions/23122088/colored-boxed-with-letters-a-la-gmail
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* Used to create a {@link Bitmap} that contains a letter used in the English
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* alphabet or digit, if there is no letter or digit available, a default image
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* is shown instead.
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*/
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class LetterBitmap {
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/**
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* The letter bitmap
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*/
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private final Bitmap mBitmap;
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/**
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* The background color of the letter bitmap
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*/
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private final Integer mColor;
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/**
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* Constructor for <code>LetterTileProvider</code>
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*
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* @param context The {@link Context} to use
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* @param displayName The name used to create the letter for the tile
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* @param key The key used to generate the background color for the tile
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* @param tileLetterFontSize The font size used to display the letter
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* @param width The desired width of the tile
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* @param height The desired height of the tile
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* @param backgroundColor (optional) color to use for background.
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* @param textColor (optional) color to use for text.
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*/
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public LetterBitmap(Context context, String displayName, String key, int tileLetterFontSize,
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int width, int height, Integer backgroundColor, Integer textColor) {
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TextPaint paint = new TextPaint();
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if (textColor != null) {
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paint.setColor(textColor);
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} else {
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paint.setColor(Color.WHITE);
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}
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paint.setTextAlign(Paint.Align.CENTER);
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paint.setAntiAlias(true);
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paint.setTextSize(tileLetterFontSize);
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paint.setTypeface(Typeface.defaultFromStyle(Typeface.BOLD));
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if (backgroundColor == null) {
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mColor = getDefaultColor(context, key);
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} else {
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mColor = backgroundColor;
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}
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mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
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String firstChar = displayName.substring(0, 1).toUpperCase();
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int firstCharEnd = 2;
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while (firstCharEnd <= displayName.length()) {
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// Test for the longest render-able string
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// But ignore containing only a-Z0-9 to not render things like ffi as a single character
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String test = displayName.substring(0, firstCharEnd);
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if (!isAlphabetical(test) && PaintCompat.hasGlyph(paint, test)) {
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firstChar = test;
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}
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firstCharEnd++;
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}
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Log.d("LetterBitmap", "using sequence " + firstChar + " to render first char which has length " + firstChar.length());
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final Canvas c = new Canvas();
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c.setBitmap(mBitmap);
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c.drawColor(mColor);
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Rect bounds = new Rect();
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paint.getTextBounds(firstChar, 0, firstChar.length(), bounds);
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c.drawText(firstChar,
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0, firstChar.length(),
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width / 2.0f, (height - (bounds.bottom + bounds.top)) / 2.0f
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, paint);
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}
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/**
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* @return A {@link Bitmap} that contains a letter used in the English
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* alphabet or digit, if there is no letter or digit available, a
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* default image is shown instead
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*/
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public Bitmap getLetterTile() {
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return mBitmap;
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}
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/**
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* @return background color used for letter title.
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*/
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public int getBackgroundColor() {
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return mColor;
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}
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/**
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* @param key The key used to generate the tile color
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* @return A new or previously chosen color for <code>key</code> used as the
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* tile background color
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*/
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private static int pickColor(String key, TypedArray colors) {
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// String.hashCode() is not supposed to change across java versions, so
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// this should guarantee the same key always maps to the same color
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final int color = Math.abs(key.hashCode()) % colors.length();
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return colors.getColor(color, Color.BLACK);
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}
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private static boolean isAlphabetical(String string) {
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return string.matches("[a-zA-Z0-9]*");
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}
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/**
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* Determine the color which the letter tile will use if no default
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* color is provided.
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*/
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public static int getDefaultColor(Context context, String key) {
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final Resources res = context.getResources();
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TypedArray colors = res.obtainTypedArray(R.array.letter_tile_colors);
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int color = pickColor(key, colors);
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colors.recycle();
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return color;
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}
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}
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136
app/src/main/java/protect/card_locker/LetterBitmap.kt
Normal file
136
app/src/main/java/protect/card_locker/LetterBitmap.kt
Normal file
@@ -0,0 +1,136 @@
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package protect.card_locker
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import android.content.Context
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import android.content.res.TypedArray
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import android.graphics.Bitmap
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import android.graphics.Canvas
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import android.graphics.Color
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import android.graphics.Paint
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import android.graphics.Rect
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import android.graphics.Typeface
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import android.text.TextPaint
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import android.util.Log
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import androidx.core.graphics.PaintCompat
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import java.util.Locale
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import kotlin.math.abs
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/**
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* Original from https://github.com/andOTP/andOTP/blob/master/app/src/main/java/org/shadowice/flocke/andotp/Utilities/LetterBitmap.java
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* which was originally from http://stackoverflow.com/questions/23122088/colored-boxed-with-letters-a-la-gmail
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* Used to create a {@link Bitmap} that contains a letter used in the English
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* alphabet or digit, if there is no letter or digit available, a default image
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* is shown instead.
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*
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* @constructor Constructor for <code>LetterTileProvider</code>
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* @param context The {@link Context} to use
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* @param displayName The name used to create the letter for the tile
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* @param key The key used to generate the background color for the tile
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* @param tileLetterFontSize The font size used to display the letter
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* @param width The desired width of the tile
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* @param height The desired height of the tile
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* @param backgroundColor (optional) color to use for background.
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* @param textColor (optional) color to use for text.
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*/
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class LetterBitmap(
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context: Context, displayName: String, key: String, tileLetterFontSize: Int,
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width: Int, height: Int, backgroundColor: Int?, textColor: Int?
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) {
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/**
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* A {@link Bitmap} that contains a letter used in the English
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* alphabet or digit, if there is no letter or digit available, a
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* default image is shown instead
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*/
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private val letterTile: Bitmap
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/**
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* The background color of the letter bitmap
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*/
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private val mColor: Int
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init {
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val paint = TextPaint().apply {
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color = textColor ?: Color.WHITE
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textAlign = Paint.Align.CENTER
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isAntiAlias = true
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textSize = tileLetterFontSize.toFloat()
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typeface = Typeface.defaultFromStyle(Typeface.BOLD)
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}
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mColor = backgroundColor ?: getDefaultColor(context, key)
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this.letterTile = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
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var firstChar = displayName.substring(0, 1).uppercase(Locale.getDefault())
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var firstCharEnd = 2
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while (firstCharEnd <= displayName.length) {
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// Test for the longest render-able string
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// But ignore containing only a-Z0-9 to not render things like ffi as a single character
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val test = displayName.substring(0, firstCharEnd)
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if (!isAlphabetical(test) && PaintCompat.hasGlyph(paint, test)) {
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firstChar = test
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}
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firstCharEnd++
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}
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Log.d(
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"LetterBitmap",
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"using sequence $firstChar to render first char which has length ${firstChar.length}"
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)
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Canvas().apply {
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setBitmap(this@LetterBitmap.letterTile)
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drawColor(mColor)
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val bounds = Rect()
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paint.getTextBounds(firstChar, 0, firstChar.length, bounds)
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drawText(
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firstChar,
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0, firstChar.length,
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width / 2.0f, (height - (bounds.bottom + bounds.top)) / 2.0f,
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paint
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)
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}
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}
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val backgroundColor: Int
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/**
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* @return background color used for letter title.
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*/
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get() = mColor
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fun getLetterTile(): Bitmap {
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return letterTile
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}
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companion object {
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/**
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* @param key The key used to generate the tile color
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* @return A new or previously chosen color for `key` used as the
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* tile background color
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*/
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private fun pickColor(key: String, colors: TypedArray): Int {
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// String.hashCode() is not supposed to change across java versions, so
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// this should guarantee the same key always maps to the same color
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val color = abs(key.hashCode()) % colors.length()
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return colors.getColor(color, Color.BLACK)
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}
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private fun isAlphabetical(string: String): Boolean {
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return string.matches("[a-zA-Z0-9]*".toRegex())
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}
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/**
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* Determine the color which the letter tile will use if no default
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* color is provided.
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*/
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fun getDefaultColor(context: Context, key: String): Int {
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val res = context.resources
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val colors = res.obtainTypedArray(R.array.letter_tile_colors)
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val color: Int = pickColor(key, colors)
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colors.recycle()
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return color
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}
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}
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}
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@@ -143,7 +143,7 @@ public class Utils {
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int pixelSize = context.getResources().getDimensionPixelSize(R.dimen.tileLetterImageSize);
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if (backgroundColor == null) {
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backgroundColor = LetterBitmap.getDefaultColor(context, store);
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backgroundColor = LetterBitmap.Companion.getDefaultColor(context, store);
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}
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return new LetterBitmap(context, store, store,
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@@ -1129,7 +1129,7 @@ public class Utils {
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}
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public static int getHeaderColor(Context context, LoyaltyCard loyaltyCard) {
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return loyaltyCard.headerColor != null ? loyaltyCard.headerColor : LetterBitmap.getDefaultColor(context, loyaltyCard.store);
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return loyaltyCard.headerColor != null ? loyaltyCard.headerColor : LetterBitmap.Companion.getDefaultColor(context, loyaltyCard.store);
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}
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public static String checksum(InputStream input) throws IOException {
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