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, defaultTextColorDisabled;
58 public static int profileThemeId = -1;
59 public static MutableLiveData<Integer> themeWatch = new MutableLiveData<>(0);
60 public static int errorTextColor;
61 private static int[] themeIDs =
62 {R.style.AppTheme_000, R.style.AppTheme_005,
63 R.style.AppTheme_010, R.style.AppTheme_015,
64 R.style.AppTheme_020, R.style.AppTheme_025,
65 R.style.AppTheme_030, R.style.AppTheme_035,
66 R.style.AppTheme_040, R.style.AppTheme_045,
67 R.style.AppTheme_050, R.style.AppTheme_055,
68 R.style.AppTheme_060, R.style.AppTheme_065,
69 R.style.AppTheme_070, R.style.AppTheme_075,
70 R.style.AppTheme_080, R.style.AppTheme_085,
71 R.style.AppTheme_090, R.style.AppTheme_095,
72 R.style.AppTheme_100, R.style.AppTheme_105,
73 R.style.AppTheme_110, R.style.AppTheme_115,
74 R.style.AppTheme_120, R.style.AppTheme_125,
75 R.style.AppTheme_130, R.style.AppTheme_135,
76 R.style.AppTheme_140, R.style.AppTheme_145,
77 R.style.AppTheme_150, R.style.AppTheme_155,
78 R.style.AppTheme_160, R.style.AppTheme_165,
79 R.style.AppTheme_170, R.style.AppTheme_175,
80 R.style.AppTheme_180, R.style.AppTheme_185,
81 R.style.AppTheme_190, R.style.AppTheme_195,
82 R.style.AppTheme_200, R.style.AppTheme_205,
83 R.style.AppTheme_210, R.style.AppTheme_215,
84 R.style.AppTheme_220, R.style.AppTheme_225,
85 R.style.AppTheme_230, R.style.AppTheme_235,
86 R.style.AppTheme_240, R.style.AppTheme_245,
87 R.style.AppTheme_250, R.style.AppTheme_255,
88 R.style.AppTheme_260, R.style.AppTheme_265,
89 R.style.AppTheme_270, R.style.AppTheme_275,
90 R.style.AppTheme_280, R.style.AppTheme_285,
91 R.style.AppTheme_290, R.style.AppTheme_295,
92 R.style.AppTheme_300, R.style.AppTheme_305,
93 R.style.AppTheme_310, R.style.AppTheme_315,
94 R.style.AppTheme_320, R.style.AppTheme_325,
95 R.style.AppTheme_330, R.style.AppTheme_335,
96 R.style.AppTheme_340, R.style.AppTheme_345,
97 R.style.AppTheme_350, R.style.AppTheme_355,
99 public static void refreshColors(Resources.Theme theme) {
100 TypedValue tv = new TypedValue();
101 theme.resolveAttribute(R.attr.table_row_dark_bg, tv, true);
102 tableRowDarkBG = tv.data;
103 theme.resolveAttribute(R.attr.table_row_light_bg, tv, true);
104 tableRowLightBG = tv.data;
105 theme.resolveAttribute(R.attr.colorPrimary, tv, true);
107 theme.resolveAttribute(R.attr.textColor, tv, true);
108 defaultTextColor = tv.data;
109 defaultTextColorDisabled = 0x7f000000 | 0x00ffffff & defaultTextColor;
110 theme.resolveAttribute(R.attr.colorAccent, tv, true);
112 theme.resolveAttribute(R.attr.errorTextColor, tv, true);
113 errorTextColor = tv.data;
115 // trigger theme observers
116 themeWatch.postValue(themeWatch.getValue() + 1);
118 public static @ColorInt
119 int hslColor(float hueRatio, float saturation, float lightness) {
120 return 0xff000000 | hslTriplet(hueRatio, saturation, lightness);
122 public static @ColorInt
123 int hslTriplet(float hueRatio, float saturation, float lightness) {
124 @ColorLong long result;
125 float h = hueRatio * 6;
126 float c = (1 - abs(2f * lightness - 1)) * saturation;
127 float h_mod_2 = h % 2;
128 float x = c * (1 - Math.abs(h_mod_2 - 1));
130 float m = lightness - c / 2f;
133 return tupleToColor(c + m, x + m, 0 + m);
135 return tupleToColor(x + m, c + m, 0 + m);
137 return tupleToColor(0 + m, c + m, x + m);
139 return tupleToColor(0 + m, x + m, c + m);
141 return tupleToColor(x + m, 0 + m, c + m);
143 return tupleToColor(c + m, 0 + m, x + m);
145 throw new IllegalArgumentException(String.format(
146 "Unexpected value for h (%1.3f) while converting hsl(%1.3f, %1.3f, %1.3f) to rgb",
147 h, hueRatio, saturation, lightness));
149 public static @ColorInt
150 int tupleToColor(float r, float g, float b) {
151 int r_int = Math.round(255 * r);
152 int g_int = Math.round(255 * g);
153 int b_int = Math.round(255 * b);
154 return (r_int << 16) | (g_int << 8) | b_int;
156 public static float baseHueLightness(int baseHueDegrees) {
157 switch (baseHueDegrees % 360) {
159 return 0.450f; // red
161 return 0.400f; // yellow
163 return 0.400f; // green
165 return 0.400f; // cyan
167 return 0.750f; // blue
169 return 0.500f; // magenta
171 throw new IllegalStateException(
172 String.format(Locale.US, "baseHueLightness called with invalid value %d",
176 public static float hueLightness(int hueDegrees) {
177 int mod = hueDegrees % baseHueStep;
178 int x0 = hueDegrees - mod;
179 int x1 = x0 + baseHueStep;
181 float y0 = baseHueLightness(x0);
182 float y1 = baseHueLightness(x1);
184 return y0 + (hueDegrees - x0) * (y1 - y0) / (x1 - x0);
186 public static @ColorInt
187 int getPrimaryColorForHue(int hueDegrees) {
188 int result = hslColor(hueDegrees / 360f, 0.845f, hueLightness(hueDegrees));
189 debug("colors", String.format(Locale.ENGLISH, "getPrimaryColorForHue(%d) = %x", hueDegrees,
193 public static void setupTheme(Activity activity) {
194 MobileLedgerProfile profile = Data.profile.getValue();
195 setupTheme(activity, profile);
197 public static void setupTheme(Activity activity, MobileLedgerProfile profile) {
198 final int themeHue = (profile == null) ? -1 : profile.getThemeHue();
199 setupTheme(activity, themeHue);
201 public static int getThemeIdForHue(int themeHue) {
205 if ((themeHue >= 0) && (themeHue < 360)) {
207 if ((themeHue % HueRing.hueStepDegrees) != 0) {
208 Logger.warn("profiles",
209 String.format(Locale.US, "Adjusting unexpected hue %d", themeHue));
210 index = Math.round(1f * themeHue / HueRing.hueStepDegrees);
213 index = themeHue / HueRing.hueStepDegrees;
215 themeId = themeIDs[index];
219 themeId = R.style.AppTheme;
221 String.format(Locale.ENGLISH, "Theme hue %d not supported, using the default",
227 public static void setupTheme(Activity activity, int themeHue) {
228 int themeId = getThemeIdForHue(themeHue);
229 activity.setTheme(themeId);
231 refreshColors(activity.getTheme());
234 public static @NonNull
235 ColorStateList getColorStateList() {
236 return getColorStateList(profileThemeId);
238 public static @NonNull
239 ColorStateList getColorStateList(int hue) {
240 return new ColorStateList(EMPTY_STATES, getColors(hue));
242 public static int[] getColors() {
243 return getColors(profileThemeId);
245 public static int[] getColors(int hue) {
246 int[] colors = new int[]{0, 0, 0, 0, 0, 0};
247 for (int i = 0; i < 6; i++, hue = (hue + 60) % 360) {
248 colors[i] = getPrimaryColorForHue(hue);
252 public static int getNewProfileThemeHue(ArrayList<MobileLedgerProfile> profiles) {
253 if ((profiles == null) || (profiles.size() == 0))
254 return DEFAULT_HUE_DEG;
258 if (profiles.size() == 1) {
259 int opposite = profiles.get(0)
260 .getThemeHue() + 180;
262 chosenHue = opposite;
265 ArrayList<Integer> hues = new ArrayList<>();
266 for (MobileLedgerProfile p : profiles) {
267 int hue = p.getThemeHue();
269 hue = DEFAULT_HUE_DEG;
272 Collections.sort(hues);
273 if (BuildConfig.DEBUG) {
274 StringBuilder huesSB = new StringBuilder();
276 if (huesSB.length() > 0)
278 huesSB.append(String.valueOf(h));
280 debug("profiles", String.format("used hues: %s", huesSB.toString()));
282 hues.add(hues.get(0));
285 int largestInterval = 0;
286 ArrayList<Integer> largestIntervalStarts = new ArrayList<>();
296 interval = h - lastHue; // 10 -> 20 is a step of 10
298 interval = h + (360 - lastHue); // 350 -> 20 is a step of 30
300 if (interval > largestInterval) {
301 largestInterval = interval;
302 largestIntervalStarts.clear();
303 largestIntervalStarts.add(lastHue);
305 else if (interval == largestInterval) {
306 largestIntervalStarts.add(lastHue);
312 final int chosenIndex = (int) (Math.random() * largestIntervalStarts.size());
313 int chosenIntervalStart = largestIntervalStarts.get(chosenIndex);
316 String.format(Locale.US, "Choosing the middle colour between %d and %d",
317 chosenIntervalStart, chosenIntervalStart + largestInterval));
319 if (largestInterval % 2 != 0)
320 largestInterval++; // round up the middle point
322 chosenHue = (chosenIntervalStart + (largestInterval / 2)) % 360;
325 final int mod = chosenHue % THEME_HUE_STEP_DEG;
327 if (mod > THEME_HUE_STEP_DEG / 2)
328 chosenHue += (THEME_HUE_STEP_DEG - mod); // 13 += (5-3) = 15
330 chosenHue -= mod; // 12 -= 2 = 10
333 debug("profiles", String.format(Locale.US, "New profile hue: %d", chosenHue));