2 * Copyright © 2019 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.lifecycle.MutableLiveData;
30 import net.ktnx.mobileledger.BuildConfig;
31 import net.ktnx.mobileledger.R;
32 import net.ktnx.mobileledger.model.Data;
33 import net.ktnx.mobileledger.model.MobileLedgerProfile;
34 import net.ktnx.mobileledger.ui.HueRing;
36 import java.util.ArrayList;
37 import java.util.Collections;
38 import java.util.Locale;
40 import static java.lang.Math.abs;
41 import static net.ktnx.mobileledger.utils.Logger.debug;
44 public static final int DEFAULT_HUE_DEG = 261;
45 public static final int THEME_HUE_STEP_DEG = 5;
46 public static final int baseHueStep = 60;
47 private static final float blueLightness = 0.665f;
48 private static final float yellowLightness = 0.350f;
49 private static final int[][] EMPTY_STATES = new int[][]{new int[0]};
50 public static @ColorInt
53 public static int tableRowLightBG;
55 public static int tableRowDarkBG;
57 public static int primary, defaultTextColor;
58 public static int profileThemeId = -1;
59 public static MutableLiveData<Integer> themeWatch = new MutableLiveData<>(0);
60 private static int[] themeIDs =
61 {R.style.AppTheme_NoActionBar_000, R.style.AppTheme_NoActionBar_005,
62 R.style.AppTheme_NoActionBar_010, R.style.AppTheme_NoActionBar_015,
63 R.style.AppTheme_NoActionBar_020, R.style.AppTheme_NoActionBar_025,
64 R.style.AppTheme_NoActionBar_030, R.style.AppTheme_NoActionBar_035,
65 R.style.AppTheme_NoActionBar_040, R.style.AppTheme_NoActionBar_045,
66 R.style.AppTheme_NoActionBar_050, R.style.AppTheme_NoActionBar_055,
67 R.style.AppTheme_NoActionBar_060, R.style.AppTheme_NoActionBar_065,
68 R.style.AppTheme_NoActionBar_070, R.style.AppTheme_NoActionBar_075,
69 R.style.AppTheme_NoActionBar_080, R.style.AppTheme_NoActionBar_085,
70 R.style.AppTheme_NoActionBar_090, R.style.AppTheme_NoActionBar_095,
71 R.style.AppTheme_NoActionBar_100, R.style.AppTheme_NoActionBar_105,
72 R.style.AppTheme_NoActionBar_110, R.style.AppTheme_NoActionBar_115,
73 R.style.AppTheme_NoActionBar_120, R.style.AppTheme_NoActionBar_125,
74 R.style.AppTheme_NoActionBar_130, R.style.AppTheme_NoActionBar_135,
75 R.style.AppTheme_NoActionBar_140, R.style.AppTheme_NoActionBar_145,
76 R.style.AppTheme_NoActionBar_150, R.style.AppTheme_NoActionBar_155,
77 R.style.AppTheme_NoActionBar_160, R.style.AppTheme_NoActionBar_165,
78 R.style.AppTheme_NoActionBar_170, R.style.AppTheme_NoActionBar_175,
79 R.style.AppTheme_NoActionBar_180, R.style.AppTheme_NoActionBar_185,
80 R.style.AppTheme_NoActionBar_190, R.style.AppTheme_NoActionBar_195,
81 R.style.AppTheme_NoActionBar_200, R.style.AppTheme_NoActionBar_205,
82 R.style.AppTheme_NoActionBar_210, R.style.AppTheme_NoActionBar_215,
83 R.style.AppTheme_NoActionBar_220, R.style.AppTheme_NoActionBar_225,
84 R.style.AppTheme_NoActionBar_230, R.style.AppTheme_NoActionBar_235,
85 R.style.AppTheme_NoActionBar_240, R.style.AppTheme_NoActionBar_245,
86 R.style.AppTheme_NoActionBar_250, R.style.AppTheme_NoActionBar_255,
87 R.style.AppTheme_NoActionBar_260, R.style.AppTheme_NoActionBar_265,
88 R.style.AppTheme_NoActionBar_270, R.style.AppTheme_NoActionBar_275,
89 R.style.AppTheme_NoActionBar_280, R.style.AppTheme_NoActionBar_285,
90 R.style.AppTheme_NoActionBar_290, R.style.AppTheme_NoActionBar_295,
91 R.style.AppTheme_NoActionBar_300, R.style.AppTheme_NoActionBar_305,
92 R.style.AppTheme_NoActionBar_310, R.style.AppTheme_NoActionBar_315,
93 R.style.AppTheme_NoActionBar_320, R.style.AppTheme_NoActionBar_325,
94 R.style.AppTheme_NoActionBar_330, R.style.AppTheme_NoActionBar_335,
95 R.style.AppTheme_NoActionBar_340, R.style.AppTheme_NoActionBar_345,
96 R.style.AppTheme_NoActionBar_350, R.style.AppTheme_NoActionBar_355,
98 public static void refreshColors(Resources.Theme theme) {
99 TypedValue tv = new TypedValue();
100 theme.resolveAttribute(R.attr.table_row_dark_bg, tv, true);
101 tableRowDarkBG = tv.data;
102 theme.resolveAttribute(R.attr.table_row_light_bg, tv, true);
103 tableRowLightBG = tv.data;
104 theme.resolveAttribute(R.attr.colorPrimary, tv, true);
106 theme.resolveAttribute(R.attr.textColor, tv, true);
107 defaultTextColor = tv.data;
108 theme.resolveAttribute(R.attr.colorAccent, tv, true);
111 // trigger theme observers
112 themeWatch.postValue(themeWatch.getValue() + 1);
114 public static @ColorInt
115 int hslColor(float hueRatio, float saturation, float lightness) {
116 return 0xff000000 | hslTriplet(hueRatio, saturation, lightness);
118 public static @ColorInt
119 int hslTriplet(float hueRatio, float saturation, float lightness) {
120 @ColorLong long result;
121 float h = hueRatio * 6;
122 float c = (1 - abs(2f * lightness - 1)) * saturation;
123 float h_mod_2 = h % 2;
124 float x = c * (1 - Math.abs(h_mod_2 - 1));
126 float m = lightness - c / 2f;
129 return tupleToColor(c + m, x + m, 0 + m);
131 return tupleToColor(x + m, c + m, 0 + m);
133 return tupleToColor(0 + m, c + m, x + m);
135 return tupleToColor(0 + m, x + m, c + m);
137 return tupleToColor(x + m, 0 + m, c + m);
139 return tupleToColor(c + m, 0 + m, x + m);
141 throw new IllegalArgumentException(String.format(
142 "Unexpected value for h (%1.3f) while converting hsl(%1.3f, %1.3f, %1.3f) to rgb",
143 h, hueRatio, saturation, lightness));
145 public static @ColorInt
146 int tupleToColor(float r, float g, float b) {
147 int r_int = Math.round(255 * r);
148 int g_int = Math.round(255 * g);
149 int b_int = Math.round(255 * b);
150 return (r_int << 16) | (g_int << 8) | b_int;
152 public static float baseHueLightness(int baseHueDegrees) {
153 switch (baseHueDegrees % 360) {
155 return 0.450f; // red
157 return 0.400f; // yellow
159 return 0.400f; // green
161 return 0.400f; // cyan
163 return 0.750f; // blue
165 return 0.500f; // magenta
167 throw new IllegalStateException(
168 String.format(Locale.US, "baseHueLightness called with invalid value %d",
172 public static float hueLightness(int hueDegrees) {
173 int mod = hueDegrees % baseHueStep;
174 int x0 = hueDegrees - mod;
175 int x1 = x0 + baseHueStep;
177 float y0 = baseHueLightness(x0);
178 float y1 = baseHueLightness(x1);
180 return y0 + (hueDegrees - x0) * (y1 - y0) / (x1 - x0);
182 public static @ColorInt
183 int getPrimaryColorForHue(int hueDegrees) {
184 int result = hslColor(hueDegrees / 360f, 0.845f, hueLightness(hueDegrees));
185 debug("colors", String.format(Locale.ENGLISH, "getPrimaryColorForHue(%d) = %x", hueDegrees,
189 public static void setupTheme(Activity activity) {
190 MobileLedgerProfile profile = Data.profile.getValue();
191 setupTheme(activity, profile);
193 public static void setupTheme(Activity activity, MobileLedgerProfile profile) {
194 final int themeHue = (profile == null) ? -1 : profile.getThemeHue();
195 setupTheme(activity, themeHue);
197 public static int getThemeIdForHue(int themeHue) {
201 if ((themeHue >= 0) && (themeHue < 360)) {
203 if ((themeHue % HueRing.hueStepDegrees) != 0) {
204 Logger.warn("profiles",
205 String.format(Locale.US, "Adjusting unexpected hue %d", themeHue));
206 index = Math.round(1f * themeHue / HueRing.hueStepDegrees);
209 index = themeHue / HueRing.hueStepDegrees;
211 themeId = themeIDs[index];
215 themeId = R.style.AppTheme_NoActionBar;
217 String.format(Locale.ENGLISH, "Theme hue %d not supported, using the default",
223 public static void setupTheme(Activity activity, int themeHue) {
224 int themeId = getThemeIdForHue(themeHue);
225 activity.setTheme(themeId);
227 refreshColors(activity.getTheme());
230 public static @NonNull
231 ColorStateList getColorStateList() {
232 return getColorStateList(profileThemeId);
234 public static @NonNull
235 ColorStateList getColorStateList(int hue) {
236 return new ColorStateList(EMPTY_STATES, getColors(hue));
238 public static int[] getColors() {
239 return getColors(profileThemeId);
241 public static int[] getColors(int hue) {
242 int[] colors = new int[]{0, 0, 0, 0, 0, 0};
243 for (int i = 0; i < 6; i++, hue = (hue + 60) % 360) {
244 colors[i] = getPrimaryColorForHue(hue);
248 public static int getNewProfileThemeHue(ArrayList<MobileLedgerProfile> profiles) {
249 if ((profiles == null) || (profiles.size() == 0))
250 return DEFAULT_HUE_DEG;
254 if (profiles.size() == 1) {
255 int opposite = profiles.get(0)
256 .getThemeHue() + 180;
258 chosenHue = opposite;
261 ArrayList<Integer> hues = new ArrayList<>();
262 for (MobileLedgerProfile p : profiles) {
263 int hue = p.getThemeHue();
265 hue = DEFAULT_HUE_DEG;
268 Collections.sort(hues);
269 if (BuildConfig.DEBUG) {
270 StringBuilder huesSB = new StringBuilder();
272 if (huesSB.length() > 0)
274 huesSB.append(String.valueOf(h));
276 debug("profiles", String.format("used hues: %s", huesSB.toString()));
278 hues.add(hues.get(0));
281 int largestInterval = 0;
282 ArrayList<Integer> largestIntervalStarts = new ArrayList<>();
292 interval = h - lastHue; // 10 -> 20 is a step of 10
294 interval = h + (360 - lastHue); // 350 -> 20 is a step of 30
296 if (interval > largestInterval) {
297 largestInterval = interval;
298 largestIntervalStarts.clear();
299 largestIntervalStarts.add(lastHue);
301 else if (interval == largestInterval) {
302 largestIntervalStarts.add(lastHue);
308 final int chosenIndex = (int) (Math.random() * largestIntervalStarts.size());
309 int chosenIntervalStart = largestIntervalStarts.get(chosenIndex);
312 String.format(Locale.US, "Choosing the middle colour between %d and %d",
313 chosenIntervalStart, chosenIntervalStart + largestInterval));
315 if (largestInterval % 2 != 0)
316 largestInterval++; // round up the middle point
318 chosenHue = (chosenIntervalStart + (largestInterval / 2)) % 360;
321 final int mod = chosenHue % THEME_HUE_STEP_DEG;
323 if (mod > THEME_HUE_STEP_DEG / 2)
324 chosenHue += (THEME_HUE_STEP_DEG - mod); // 13 += (5-3) = 15
326 chosenHue -= mod; // 12 -= 2 = 10
329 debug("profiles", String.format(Locale.US, "New profile hue: %d", chosenHue));