New helper class for color stuff

diff --git a/app/src/main/java/net/ktnx/mobileledger/utils/Colors.java b/app/src/main/java/net/ktnx/mobileledger/utils/Colors.java
new file mode 100644 (file)
index 0000000..edd9c77
--- /dev/null
+++ b/app/src/main/java/net/ktnx/mobileledger/utils/Colors.java
@@ -0,0 +1,191 @@
+package net.ktnx.mobileledger.utils;
+
+import android.app.Activity;
+import android.content.res.Resources;
+import android.support.annotation.ColorInt;
+import android.support.annotation.ColorLong;
+import android.util.Log;
+import android.util.TypedValue;
+
+import net.ktnx.mobileledger.R;
+import net.ktnx.mobileledger.model.Data;
+import net.ktnx.mobileledger.model.MobileLedgerProfile;
+
+public class Colors {
+    public static final int DEFAULT_HUE_DEG = 261;
+    public static @ColorInt
+    int accent;
+    @ColorInt
+    public static int tableRowLightBG;
+    @ColorInt
+    public static int tableRowDarkBG;
+    @ColorInt
+    public static int primary, defaultTextColor;
+    public static int profileThemeId = -1;
+
+    public static ObservableValue<Integer> themeWatch = new ObservableValue<>(0);
+    public static void refreshColors(Resources.Theme theme) {
+        TypedValue tv = new TypedValue();
+        theme.resolveAttribute(R.attr.table_row_dark_bg, tv, true);
+        tableRowDarkBG = tv.data;
+        theme.resolveAttribute(R.attr.table_row_light_bg, tv, true);
+        tableRowLightBG = tv.data;
+        theme.resolveAttribute(R.attr.colorPrimary, tv, true);
+        primary = tv.data;
+
+        // trigger theme observers
+        themeWatch.notifyObservers();
+    }
+    public static @ColorLong
+    long hsvaColor(float hue, float saturation, float value, float alpha) {
+        if (alpha < 0 || alpha > 1)
+            throw new IllegalArgumentException("alpha must be between 0 and 1");
+
+        @ColorLong long rgb = hsvTriplet(hue, saturation, value);
+
+        long a_bits = Math.round(255 * alpha);
+        return (a_bits << 24) | rgb;
+    }
+    public static @ColorInt
+    int hsvColor(float hue, float saturation, float value) {
+        return 0xff000000 | hsvTriplet(hue, saturation, value);
+    }
+    public static @ColorInt
+    int hsvTriplet(float hue, float saturation, float value) {
+        @ColorLong long result;
+        int r, g, b;
+
+        if ((hue < 0) || (hue > 1) || (saturation < 0) || (saturation > 1) || (value < 0) ||
+            (value > 1)) throw new IllegalArgumentException(
+                "hue, saturation, value and alpha must all be between 0 and 1");
+
+        int h = (int) (hue * 6);
+        float f = hue * 6 - h;
+        float p = value * (1 - saturation);
+        float q = value * (1 - f * saturation);
+        float t = value * (1 - (1 - f) * saturation);
+
+        switch (h) {
+            case 0:
+            case 6:
+                return tupleToColor(value, t, p);
+            case 1:
+                return tupleToColor(q, value, p);
+            case 2:
+                return tupleToColor(p, value, t);
+            case 3:
+                return tupleToColor(p, q, value);
+            case 4:
+                return tupleToColor(t, p, value);
+            case 5:
+                return tupleToColor(value, p, q);
+            default:
+                throw new RuntimeException(String.format("Unexpected value for h (%d) while " +
+                                                         "converting hsv(%1.2f, %1.2f, %1.2f) to " +
+                                                         "rgb", h, hue, saturation, value));
+        }
+    }
+
+    public static @ColorInt
+    int tupleToColor(float r, float g, float b) {
+        int r_int = Math.round(255 * r);
+        int g_int = Math.round(255 * g);
+        int b_int = Math.round(255 * b);
+        return (r_int << 16) | (g_int << 8) | b_int;
+    }
+    public static @ColorInt
+    int getPrimaryColorForHue(int degrees) {
+        return getPrimaryColorForHue(degrees / 360f);
+    }
+    public static @ColorInt
+    int getPrimaryColorForHue(float hue) {
+        int result = hsvColor(hue, 0.61f, 0.95f);
+        Log.d("colors", String.format("getPrimaryColorForHue(%1.2f) = %x", hue, result));
+        return result;
+    }
+    public static void setupTheme(Activity activity) {
+        MobileLedgerProfile profile = Data.profile.get();
+        if (profile != null) {
+            switch (Data.profile.get().getThemeId()) {
+                case 0:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_0);
+                    break;
+                case 15:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_15);
+                    break;
+                case 30:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_30);
+                    break;
+                case 45:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_45);
+                    break;
+                case 60:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_60);
+                    break;
+                case 75:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_75);
+                    break;
+                case 90:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_90);
+                    break;
+                case 105:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_105);
+                    break;
+                case 120:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_120);
+                    break;
+                case 135:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_135);
+                    break;
+                case 150:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_150);
+                    break;
+                case 165:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_165);
+                    break;
+                case 180:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_180);
+                    break;
+                case 195:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_195);
+                    break;
+                case 210:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_210);
+                    break;
+                case 225:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_225);
+                    break;
+                case 240:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_240);
+                    break;
+                case 255:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_255);
+                    break;
+                case 270:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_270);
+                    break;
+                case 285:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_285);
+                    break;
+                case 300:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_300);
+                    break;
+                case 315:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_315);
+                    break;
+                case 330:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_330);
+                    break;
+                case 345:
+                    activity.setTheme(R.style.AppTheme_NoActionBar_345);
+                    break;
+                default:
+                    activity.setTheme(R.style.AppTheme_NoActionBar);
+            }
+        }
+        else activity.setTheme(R.style.AppTheme_NoActionBar);
+
+        refreshColors(activity.getTheme());
+    }
+
+}