2 * Copyright © 2020 Damyan Ivanov.
3 * This file is part of MoLe.
4 * MoLe is free software: you can distribute it and/or modify it
5 * under the term of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your opinion), any later version.
9 * MoLe is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License terms for details.
14 * You should have received a copy of the GNU General Public License
15 * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
18 package net.ktnx.mobileledger.utils;
20 import android.app.Activity;
21 import android.content.res.ColorStateList;
22 import android.content.res.Resources;
23 import android.util.TypedValue;
25 import androidx.annotation.ColorInt;
26 import androidx.annotation.ColorLong;
27 import androidx.annotation.NonNull;
28 import androidx.annotation.Nullable;
29 import androidx.lifecycle.MutableLiveData;
31 import net.ktnx.mobileledger.BuildConfig;
32 import net.ktnx.mobileledger.R;
33 import net.ktnx.mobileledger.model.Data;
34 import net.ktnx.mobileledger.model.MobileLedgerProfile;
35 import net.ktnx.mobileledger.ui.HueRing;
37 import java.util.ArrayList;
38 import java.util.Collections;
39 import java.util.Locale;
41 import static java.lang.Math.abs;
42 import static net.ktnx.mobileledger.utils.Logger.debug;
45 public static final int DEFAULT_HUE_DEG = 261;
46 public static final int THEME_HUE_STEP_DEG = 5;
47 public static final int baseHueStep = 60;
48 public static final MutableLiveData<Integer> themeWatch = new MutableLiveData<>(0);
49 private static final float blueLightness = 0.665f;
50 private static final float yellowLightness = 0.350f;
51 private static final int[][] EMPTY_STATES = new int[][]{new int[0]};
52 private static final int SWIPE_COLOR_COUNT = 6;
53 public static @ColorInt
56 public static int tableRowDarkBG;
57 public static int profileThemeId = -1;
58 private static final int[] themeIDs =
59 {R.style.AppTheme_000, R.style.AppTheme_005, R.style.AppTheme_010, R.style.AppTheme_015,
60 R.style.AppTheme_020, R.style.AppTheme_025, R.style.AppTheme_030, R.style.AppTheme_035,
61 R.style.AppTheme_040, R.style.AppTheme_045, R.style.AppTheme_050, R.style.AppTheme_055,
62 R.style.AppTheme_060, R.style.AppTheme_065, R.style.AppTheme_070, R.style.AppTheme_075,
63 R.style.AppTheme_080, R.style.AppTheme_085, R.style.AppTheme_090, R.style.AppTheme_095,
64 R.style.AppTheme_100, R.style.AppTheme_105, R.style.AppTheme_110, R.style.AppTheme_115,
65 R.style.AppTheme_120, R.style.AppTheme_125, R.style.AppTheme_130, R.style.AppTheme_135,
66 R.style.AppTheme_140, R.style.AppTheme_145, R.style.AppTheme_150, R.style.AppTheme_155,
67 R.style.AppTheme_160, R.style.AppTheme_165, R.style.AppTheme_170, R.style.AppTheme_175,
68 R.style.AppTheme_180, R.style.AppTheme_185, R.style.AppTheme_190, R.style.AppTheme_195,
69 R.style.AppTheme_200, R.style.AppTheme_205, R.style.AppTheme_210, R.style.AppTheme_215,
70 R.style.AppTheme_220, R.style.AppTheme_225, R.style.AppTheme_230, R.style.AppTheme_235,
71 R.style.AppTheme_240, R.style.AppTheme_245, R.style.AppTheme_250, R.style.AppTheme_255,
72 R.style.AppTheme_260, R.style.AppTheme_265, R.style.AppTheme_270, R.style.AppTheme_275,
73 R.style.AppTheme_280, R.style.AppTheme_285, R.style.AppTheme_290, R.style.AppTheme_295,
74 R.style.AppTheme_300, R.style.AppTheme_305, R.style.AppTheme_310, R.style.AppTheme_315,
75 R.style.AppTheme_320, R.style.AppTheme_325, R.style.AppTheme_330, R.style.AppTheme_335,
76 R.style.AppTheme_340, R.style.AppTheme_345, R.style.AppTheme_350, R.style.AppTheme_355,
78 public static void refreshColors(Resources.Theme theme) {
79 TypedValue tv = new TypedValue();
80 theme.resolveAttribute(R.attr.table_row_dark_bg, tv, true);
81 tableRowDarkBG = tv.data;
82 theme.resolveAttribute(R.attr.colorSecondary, tv, true);
85 // trigger theme observers
86 themeWatch.postValue(themeWatch.getValue() + 1);
88 public static @ColorInt
89 int hslColor(float hueRatio, float saturation, float lightness) {
90 return 0xff000000 | hslTriplet(hueRatio, saturation, lightness);
92 public static @ColorInt
93 int hslTriplet(float hueRatio, float saturation, float lightness) {
94 @ColorLong long result;
95 float h = hueRatio * 6;
96 float c = (1 - abs(2f * lightness - 1)) * saturation;
97 float h_mod_2 = h % 2;
98 float x = c * (1 - Math.abs(h_mod_2 - 1));
100 float m = lightness - c / 2f;
103 return tupleToColor(c + m, x + m, 0 + m);
105 return tupleToColor(x + m, c + m, 0 + m);
107 return tupleToColor(0 + m, c + m, x + m);
109 return tupleToColor(0 + m, x + m, c + m);
111 return tupleToColor(x + m, 0 + m, c + m);
113 return tupleToColor(c + m, 0 + m, x + m);
115 throw new IllegalArgumentException(String.format(
116 "Unexpected value for h (%1.3f) while converting hsl(%1.3f, %1.3f, %1.3f) to rgb",
117 h, hueRatio, saturation, lightness));
119 public static @ColorInt
120 int tupleToColor(float r, float g, float b) {
121 int r_int = Math.round(255 * r);
122 int g_int = Math.round(255 * g);
123 int b_int = Math.round(255 * b);
124 return (r_int << 16) | (g_int << 8) | b_int;
126 public static float baseHueLightness(int baseHueDegrees) {
127 switch (baseHueDegrees % 360) {
129 return 0.550f; // red
131 return 0.250f; // yellow
133 return 0.290f; // green
135 return 0.300f; // cyan
137 return 0.710f; // blue
139 return 0.450f; // magenta
141 throw new IllegalStateException(
142 String.format(Locale.US, "baseHueLightness called with invalid value %d",
146 public static float hueLightness(int hueDegrees) {
147 int mod = hueDegrees % baseHueStep;
148 int x0 = hueDegrees - mod;
149 int x1 = x0 + baseHueStep;
151 float y0 = baseHueLightness(x0);
152 float y1 = baseHueLightness(x1);
154 return y0 + (hueDegrees - x0) * (y1 - y0) / (x1 - x0);
156 public static @ColorInt
157 int getPrimaryColorForHue(int hueDegrees) {
158 int result = hslColor(hueDegrees / 360f, 0.845f, hueLightness(hueDegrees));
159 // debug("colors", String.format(Locale.ENGLISH, "getPrimaryColorForHue(%d) = %x",
164 public static void setupTheme(Activity activity) {
165 MobileLedgerProfile profile = Data.getProfile();
166 setupTheme(activity, profile);
168 public static void setupTheme(Activity activity, @Nullable MobileLedgerProfile profile) {
169 final int themeHue = (profile == null) ? -1 : profile.getThemeHue();
170 setupTheme(activity, themeHue);
172 public static int getThemeIdForHue(int themeHue) {
176 if ((themeHue >= 0) && (themeHue < 360) && (themeHue != DEFAULT_HUE_DEG)) {
178 if ((themeHue % HueRing.hueStepDegrees) != 0) {
179 Logger.warn("profiles",
180 String.format(Locale.US, "Adjusting unexpected hue %d", themeHue));
181 index = Math.round(1f * themeHue / HueRing.hueStepDegrees);
184 index = themeHue / HueRing.hueStepDegrees;
186 themeId = themeIDs[index];
190 themeId = R.style.AppTheme_default;
192 String.format(Locale.ENGLISH, "Theme hue %d not supported, using the default",
198 public static void setupTheme(Activity activity, int themeHue) {
199 int themeId = getThemeIdForHue(themeHue);
200 activity.setTheme(themeId);
202 refreshColors(activity.getTheme());
204 public static @NonNull
205 ColorStateList getColorStateList() {
206 return getColorStateList(profileThemeId);
208 public static @NonNull
209 ColorStateList getColorStateList(int hue) {
210 return new ColorStateList(EMPTY_STATES, getSwipeCircleColors(hue));
212 public static int[] getSwipeCircleColors() {
213 return getSwipeCircleColors(profileThemeId);
215 public static int[] getSwipeCircleColors(int hue) {
216 int[] colors = new int[SWIPE_COLOR_COUNT];
217 for (int i = 0; i < SWIPE_COLOR_COUNT; i++, hue = (hue + 360 / SWIPE_COLOR_COUNT) % 360) {
218 colors[i] = getPrimaryColorForHue(hue);
222 public static int getNewProfileThemeHue(ArrayList<MobileLedgerProfile> profiles) {
223 if ((profiles == null) || (profiles.size() == 0))
224 return DEFAULT_HUE_DEG;
228 if (profiles.size() == 1) {
229 int opposite = profiles.get(0)
230 .getThemeHue() + 180;
232 chosenHue = opposite;
235 ArrayList<Integer> hues = new ArrayList<>();
236 for (MobileLedgerProfile p : profiles) {
237 int hue = p.getThemeHue();
239 hue = DEFAULT_HUE_DEG;
242 Collections.sort(hues);
243 if (BuildConfig.DEBUG) {
244 StringBuilder huesSB = new StringBuilder();
246 if (huesSB.length() > 0)
250 debug("profiles", String.format("used hues: %s", huesSB.toString()));
252 hues.add(hues.get(0));
255 int largestInterval = 0;
256 ArrayList<Integer> largestIntervalStarts = new ArrayList<>();
266 interval = h - lastHue; // 10 -> 20 is a step of 10
268 interval = h + (360 - lastHue); // 350 -> 20 is a step of 30
270 if (interval > largestInterval) {
271 largestInterval = interval;
272 largestIntervalStarts.clear();
273 largestIntervalStarts.add(lastHue);
275 else if (interval == largestInterval) {
276 largestIntervalStarts.add(lastHue);
282 final int chosenIndex = (int) (Math.random() * largestIntervalStarts.size());
283 int chosenIntervalStart = largestIntervalStarts.get(chosenIndex);
286 String.format(Locale.US, "Choosing the middle colour between %d and %d",
287 chosenIntervalStart, chosenIntervalStart + largestInterval));
289 if (largestInterval % 2 != 0)
290 largestInterval++; // round up the middle point
292 chosenHue = (chosenIntervalStart + (largestInterval / 2)) % 360;
295 final int mod = chosenHue % THEME_HUE_STEP_DEG;
297 if (mod > THEME_HUE_STEP_DEG / 2)
298 chosenHue += (THEME_HUE_STEP_DEG - mod); // 13 += (5-3) = 15
300 chosenHue -= mod; // 12 -= 2 = 10
303 debug("profiles", String.format(Locale.US, "New profile hue: %d", chosenHue));