]> git.ktnx.net Git - mobile-ledger-staging.git/blob - app/src/main/java/net/ktnx/mobileledger/utils/Colors.java
drop a couple of global colour values
[mobile-ledger-staging.git] / app / src / main / java / net / ktnx / mobileledger / utils / Colors.java
1 /*
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.
8  *
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.
13  *
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/>.
16  */
17
18 package net.ktnx.mobileledger.utils;
19
20 import android.app.Activity;
21 import android.content.res.ColorStateList;
22 import android.content.res.Resources;
23 import android.util.TypedValue;
24
25 import androidx.annotation.ColorInt;
26 import androidx.annotation.ColorLong;
27 import androidx.annotation.NonNull;
28 import androidx.lifecycle.MutableLiveData;
29
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;
35
36 import java.util.ArrayList;
37 import java.util.Collections;
38 import java.util.Locale;
39
40 import static java.lang.Math.abs;
41 import static net.ktnx.mobileledger.utils.Logger.debug;
42
43 public class Colors {
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
51     int accent;
52     @ColorInt
53     public static int tableRowLightBG;
54     @ColorInt
55     public static int tableRowDarkBG;
56     @ColorInt
57     public static int primary;
58     public static int profileThemeId = -1;
59     public static MutableLiveData<Integer> themeWatch = new MutableLiveData<>(0);
60     public static int errorTextColor;
61     private static int SWIPE_COLOR_COUNT = 6;
62     private static int[] themeIDs =
63             {R.style.AppTheme_000, R.style.AppTheme_005,
64              R.style.AppTheme_010, R.style.AppTheme_015,
65              R.style.AppTheme_020, R.style.AppTheme_025,
66              R.style.AppTheme_030, R.style.AppTheme_035,
67              R.style.AppTheme_040, R.style.AppTheme_045,
68              R.style.AppTheme_050, R.style.AppTheme_055,
69              R.style.AppTheme_060, R.style.AppTheme_065,
70              R.style.AppTheme_070, R.style.AppTheme_075,
71              R.style.AppTheme_080, R.style.AppTheme_085,
72              R.style.AppTheme_090, R.style.AppTheme_095,
73              R.style.AppTheme_100, R.style.AppTheme_105,
74              R.style.AppTheme_110, R.style.AppTheme_115,
75              R.style.AppTheme_120, R.style.AppTheme_125,
76              R.style.AppTheme_130, R.style.AppTheme_135,
77              R.style.AppTheme_140, R.style.AppTheme_145,
78              R.style.AppTheme_150, R.style.AppTheme_155,
79              R.style.AppTheme_160, R.style.AppTheme_165,
80              R.style.AppTheme_170, R.style.AppTheme_175,
81              R.style.AppTheme_180, R.style.AppTheme_185,
82              R.style.AppTheme_190, R.style.AppTheme_195,
83              R.style.AppTheme_200, R.style.AppTheme_205,
84              R.style.AppTheme_210, R.style.AppTheme_215,
85              R.style.AppTheme_220, R.style.AppTheme_225,
86              R.style.AppTheme_230, R.style.AppTheme_235,
87              R.style.AppTheme_240, R.style.AppTheme_245,
88              R.style.AppTheme_250, R.style.AppTheme_255,
89              R.style.AppTheme_260, R.style.AppTheme_265,
90              R.style.AppTheme_270, R.style.AppTheme_275,
91              R.style.AppTheme_280, R.style.AppTheme_285,
92              R.style.AppTheme_290, R.style.AppTheme_295,
93              R.style.AppTheme_300, R.style.AppTheme_305,
94              R.style.AppTheme_310, R.style.AppTheme_315,
95              R.style.AppTheme_320, R.style.AppTheme_325,
96              R.style.AppTheme_330, R.style.AppTheme_335,
97              R.style.AppTheme_340, R.style.AppTheme_345,
98              R.style.AppTheme_350, R.style.AppTheme_355,
99              };
100     public static void refreshColors(Resources.Theme theme) {
101         TypedValue tv = new TypedValue();
102         theme.resolveAttribute(R.attr.table_row_dark_bg, tv, true);
103         tableRowDarkBG = tv.data;
104         theme.resolveAttribute(R.attr.table_row_light_bg, tv, true);
105         tableRowLightBG = tv.data;
106         theme.resolveAttribute(R.attr.colorPrimary, tv, true);
107         primary = tv.data;
108         theme.resolveAttribute(R.attr.colorAccent, tv, true);
109         accent = tv.data;
110         theme.resolveAttribute(R.attr.errorTextColor, tv, true);
111         errorTextColor = tv.data;
112
113         // trigger theme observers
114         themeWatch.postValue(themeWatch.getValue() + 1);
115     }
116     public static @ColorInt
117     int hslColor(float hueRatio, float saturation, float lightness) {
118         return 0xff000000 | hslTriplet(hueRatio, saturation, lightness);
119     }
120     public static @ColorInt
121     int hslTriplet(float hueRatio, float saturation, float lightness) {
122         @ColorLong long result;
123         float h = hueRatio * 6;
124         float c = (1 - abs(2f * lightness - 1)) * saturation;
125         float h_mod_2 = h % 2;
126         float x = c * (1 - Math.abs(h_mod_2 - 1));
127         int r, g, b;
128         float m = lightness - c / 2f;
129
130         if (h < 1 || h == 6)
131             return tupleToColor(c + m, x + m, 0 + m);
132         if (h < 2)
133             return tupleToColor(x + m, c + m, 0 + m);
134         if (h < 3)
135             return tupleToColor(0 + m, c + m, x + m);
136         if (h < 4)
137             return tupleToColor(0 + m, x + m, c + m);
138         if (h < 5)
139             return tupleToColor(x + m, 0 + m, c + m);
140         if (h < 6)
141             return tupleToColor(c + m, 0 + m, x + m);
142
143         throw new IllegalArgumentException(String.format(
144                 "Unexpected value for h (%1.3f) while converting hsl(%1.3f, %1.3f, %1.3f) to rgb",
145                 h, hueRatio, saturation, lightness));
146     }
147     public static @ColorInt
148     int tupleToColor(float r, float g, float b) {
149         int r_int = Math.round(255 * r);
150         int g_int = Math.round(255 * g);
151         int b_int = Math.round(255 * b);
152         return (r_int << 16) | (g_int << 8) | b_int;
153     }
154     public static float baseHueLightness(int baseHueDegrees) {
155         switch (baseHueDegrees % 360) {
156             case 0:
157                 return 0.450f;   // red
158             case 60:
159                 return 0.400f;  // yellow
160             case 120:
161                 return 0.400f;  // green
162             case 180:
163                 return 0.400f;  // cyan
164             case 240:
165                 return 0.750f;  // blue
166             case 300:
167                 return 0.500f;   // magenta
168             default:
169                 throw new IllegalStateException(
170                         String.format(Locale.US, "baseHueLightness called with invalid value %d",
171                                 baseHueDegrees));
172         }
173     }
174     public static float hueLightness(int hueDegrees) {
175         int mod = hueDegrees % baseHueStep;
176         int x0 = hueDegrees - mod;
177         int x1 = x0 + baseHueStep;
178
179         float y0 = baseHueLightness(x0);
180         float y1 = baseHueLightness(x1);
181
182         return y0 + (hueDegrees - x0) * (y1 - y0) / (x1 - x0);
183     }
184     public static @ColorInt
185     int getPrimaryColorForHue(int hueDegrees) {
186         int result = hslColor(hueDegrees / 360f, 0.845f, hueLightness(hueDegrees));
187         debug("colors", String.format(Locale.ENGLISH, "getPrimaryColorForHue(%d) = %x", hueDegrees,
188                 result));
189         return result;
190     }
191     public static void setupTheme(Activity activity) {
192         MobileLedgerProfile profile = Data.profile.getValue();
193         setupTheme(activity, profile);
194     }
195     public static void setupTheme(Activity activity, MobileLedgerProfile profile) {
196         final int themeHue = (profile == null) ? -1 : profile.getThemeHue();
197         setupTheme(activity, themeHue);
198     }
199     public static int getThemeIdForHue(int themeHue) {
200         int themeId = -1;
201         if (themeHue == 360)
202             themeHue = 0;
203         if ((themeHue >= 0) && (themeHue < 360) && (themeHue != DEFAULT_HUE_DEG)) {
204             int index;
205             if ((themeHue % HueRing.hueStepDegrees) != 0) {
206                 Logger.warn("profiles",
207                         String.format(Locale.US, "Adjusting unexpected hue %d", themeHue));
208                 index = Math.round(1f * themeHue / HueRing.hueStepDegrees);
209             }
210             else
211                 index = themeHue / HueRing.hueStepDegrees;
212
213             themeId = themeIDs[index];
214         }
215
216         if (themeId < 0) {
217             themeId = R.style.AppTheme;
218             debug("profiles",
219                     String.format(Locale.ENGLISH, "Theme hue %d not supported, using the default",
220                             themeHue));
221         }
222
223         return themeId;
224     }
225     public static void setupTheme(Activity activity, int themeHue) {
226         int themeId = getThemeIdForHue(themeHue);
227         activity.setTheme(themeId);
228
229         refreshColors(activity.getTheme());
230     }
231     public static @NonNull
232     ColorStateList getColorStateList() {
233         return getColorStateList(profileThemeId);
234     }
235     public static @NonNull
236     ColorStateList getColorStateList(int hue) {
237         return new ColorStateList(EMPTY_STATES, getSwipeCircleColors(hue));
238     }
239     public static int[] getSwipeCircleColors() {
240         return getSwipeCircleColors(profileThemeId);
241     }
242     public static int[] getSwipeCircleColors(int hue) {
243         int[] colors = new int[SWIPE_COLOR_COUNT];
244         for (int i = 0; i < SWIPE_COLOR_COUNT; i++, hue = (hue + 360 / SWIPE_COLOR_COUNT) % 360) {
245             colors[i] = getPrimaryColorForHue(hue);
246         }
247         return colors;
248     }
249     public static int getNewProfileThemeHue(ArrayList<MobileLedgerProfile> profiles) {
250         if ((profiles == null) || (profiles.size() == 0))
251             return DEFAULT_HUE_DEG;
252
253         int chosenHue;
254
255         if (profiles.size() == 1) {
256             int opposite = profiles.get(0)
257                                    .getThemeHue() + 180;
258             opposite %= 360;
259             chosenHue = opposite;
260         }
261         else {
262             ArrayList<Integer> hues = new ArrayList<>();
263             for (MobileLedgerProfile p : profiles) {
264                 int hue = p.getThemeHue();
265                 if (hue == -1)
266                     hue = DEFAULT_HUE_DEG;
267                 hues.add(hue);
268             }
269             Collections.sort(hues);
270             if (BuildConfig.DEBUG) {
271                 StringBuilder huesSB = new StringBuilder();
272                 for (int h : hues) {
273                     if (huesSB.length() > 0)
274                         huesSB.append(", ");
275                     huesSB.append(h);
276                 }
277                 debug("profiles", String.format("used hues: %s", huesSB.toString()));
278             }
279             hues.add(hues.get(0));
280
281             int lastHue = -1;
282             int largestInterval = 0;
283             ArrayList<Integer> largestIntervalStarts = new ArrayList<>();
284
285             for (int h : hues) {
286                 if (lastHue == -1) {
287                     lastHue = h;
288                     continue;
289                 }
290
291                 int interval;
292                 if (h > lastHue)
293                     interval = h - lastHue;     // 10 -> 20 is a step of 10
294                 else
295                     interval = h + (360 - lastHue);    // 350 -> 20 is a step of 30
296
297                 if (interval > largestInterval) {
298                     largestInterval = interval;
299                     largestIntervalStarts.clear();
300                     largestIntervalStarts.add(lastHue);
301                 }
302                 else if (interval == largestInterval) {
303                     largestIntervalStarts.add(lastHue);
304                 }
305
306                 lastHue = h;
307             }
308
309             final int chosenIndex = (int) (Math.random() * largestIntervalStarts.size());
310             int chosenIntervalStart = largestIntervalStarts.get(chosenIndex);
311
312             debug("profiles",
313                     String.format(Locale.US, "Choosing the middle colour between %d and %d",
314                             chosenIntervalStart, chosenIntervalStart + largestInterval));
315
316             if (largestInterval % 2 != 0)
317                 largestInterval++;    // round up the middle point
318
319             chosenHue = (chosenIntervalStart + (largestInterval / 2)) % 360;
320         }
321
322         final int mod = chosenHue % THEME_HUE_STEP_DEG;
323         if (mod != 0) {
324             if (mod > THEME_HUE_STEP_DEG / 2)
325                 chosenHue += (THEME_HUE_STEP_DEG - mod); // 13 += (5-3) = 15
326             else
327                 chosenHue -= mod;       // 12 -= 2 = 10
328         }
329
330         debug("profiles", String.format(Locale.US, "New profile hue: %d", chosenHue));
331
332         return chosenHue;
333     }
334 }