[UI/Timetable] Show subject-based lesson colors. (#141)

* [UI/Timetable] Add timetable config dialog and implement UI options.

* [UI/Timetable] Fix reloading timetable after changing config.

* [UI/Timetable] Fix calculating lesson range boundaries.

* [UI/Timetable] Add coloring subject names.

app/src/main/java/pl/szczodrzynski/edziennik/config/ProfileConfigUI.kt

@@ -84,4 +84,9 @@ class ProfileConfigUI(private val config: ProfileConfig) {
     var timetableTrimHourRange: Boolean
         get() { mTimetableTrimHourRange = mTimetableTrimHourRange ?: config.values.get("timetableTrimHourRange", false); return mTimetableTrimHourRange ?: false }
         set(value) { config.set("timetableTrimHourRange", value); mTimetableTrimHourRange = value }
+    
+    private var mTimetableColorSubjectName: Boolean? = null
+    var timetableColorSubjectName: Boolean
+        get() { mTimetableColorSubjectName = mTimetableColorSubjectName ?: config.values.get("timetableColorSubjectName", false); return mTimetableColorSubjectName ?: false }
+        set(value) { config.set("timetableColorSubjectName", value); mTimetableColorSubjectName = value }
 }

app/src/main/java/pl/szczodrzynski/edziennik/ui/timetable/TimetableDayFragment.kt

@@ -4,6 +4,7 @@
 
 package pl.szczodrzynski.edziennik.ui.timetable
 
+import android.graphics.drawable.ColorDrawable
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -12,6 +13,7 @@ import android.widget.FrameLayout
 import android.widget.LinearLayout
 import android.widget.TextView
 import androidx.asynclayoutinflater.view.AsyncLayoutInflater
+import androidx.core.graphics.ColorUtils
 import androidx.core.view.*
 import com.linkedin.android.tachyon.DayView
 import com.linkedin.android.tachyon.DayViewConfig
@@ -33,6 +35,7 @@ import pl.szczodrzynski.edziennik.ext.*
 import pl.szczodrzynski.edziennik.ui.base.lazypager.LazyFragment
 import pl.szczodrzynski.edziennik.ui.timetable.TimetableFragment.Companion.DEFAULT_END_HOUR
 import pl.szczodrzynski.edziennik.ui.timetable.TimetableFragment.Companion.DEFAULT_START_HOUR
+import pl.szczodrzynski.edziennik.utils.Colors
 import pl.szczodrzynski.edziennik.utils.managers.NoteManager
 import pl.szczodrzynski.edziennik.utils.models.Date
 import pl.szczodrzynski.edziennik.utils.models.Time
@@ -309,13 +312,36 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
                     lesson.classroom?.let { add(it) }
                 }.concat(arrowRight)
 
+            lb.annotationVisible = manager.getAnnotation(activity, lesson, lb.annotation)
 
-            lb.lessonNumber = lesson.displayLessonNumber
             val lessonText =
                 lesson.getNoteSubstituteText(showNotes = true) ?: lesson.displaySubjectName
+
+            val (subjectTextPrimary, subjectTextSecondary) = if (profileConfig.timetableColorSubjectName) {
+                val subjectColor = Colors.stringToMaterialColorCRC(lessonText?.toString() ?: "")
+                if (lb.annotationVisible) {
+                    lb.subjectContainer.background = ColorDrawable(subjectColor)
+                } else {
+                    lb.subjectContainer.setBackgroundResource(R.drawable.timetable_subject_color_rounded)
+                    lb.subjectContainer.background.setTintColor(subjectColor)
+                }
+                when (ColorUtils.calculateLuminance(subjectColor) > 0.5) {
+                    true -> /* light */ 0xFF000000 to 0xFF666666
+                    false -> /* dark */ 0xFFFFFFFF to 0xFFAAAAAA
+                }
+            } else {
+                lb.subjectContainer.background = null
+                null to colorSecondary
+            }
+
+            lb.lessonNumber = lesson.displayLessonNumber
+            if (subjectTextPrimary != null)
+                lb.lessonNumberText.setTextColor(subjectTextPrimary.toInt())
             lb.subjectName.text = lessonText?.let {
                 if (lesson.type == Lesson.TYPE_CANCELLED || lesson.type == Lesson.TYPE_SHIFTED_SOURCE)
-                    it.asStrikethroughSpannable().asColoredSpannable(colorSecondary)
+                    it.asStrikethroughSpannable().asColoredSpannable(subjectTextSecondary.toInt())
+                else if (subjectTextPrimary != null)
+                    it.asColoredSpannable(subjectTextPrimary.toInt())
                 else
                     it
             }
@@ -342,7 +368,6 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
             }
 
             //lb.subjectName.typeface = Typeface.create("sans-serif-light", Typeface.BOLD)
-            lb.annotationVisible = manager.getAnnotation(activity, lesson, lb.annotation)
             val lessonNumberMargin =
                 if (lb.annotationVisible) (-8).dp
                 else 0

app/src/main/java/pl/szczodrzynski/edziennik/utils/Colors.java

@@ -15,6 +15,7 @@ import androidx.core.graphics.ColorUtils;
 import java.security.MessageDigest;
 import java.util.Arrays;
 import java.util.Random;
+import java.util.zip.CRC32;
 
 import pl.szczodrzynski.edziennik.data.db.entity.Grade;
 
@@ -84,6 +85,28 @@ public class Colors {
             0xFF6D4C41
     };
 
+    public static final int[] materialColorsBasic = {
+            0xFFE53935, 0xFFD81B60, 0xFF8E24AA, 0xFF5E35B1,
+            0xFF3949AB, 0xFF1E88E5, 0xFF039BE5, 0xFF00ACC1,
+            0xFF00897B, 0xFF43A047, 0xFF7CB342, 0xFFC0CA33,
+            0xFFFDD835, 0xFFFFB300, 0xFFFB8C00, 0xFFF4511E,
+            0xFF6D4C41, 0xFF757575, 0xFF546E7A, 0xFF00E676,
+
+            0xFFEF9A9A, 0xFFF48FB1, 0xFFCE93D8, 0xFFB39DDB,
+            0xFF9FA8DA, 0xFF90CAF9, 0xFF81D4FA, 0xFF80DEEA,
+            0xFF80CBC4, 0xFFA5D6A7, 0xFFC5E1A5, 0xFFE6EE9C,
+            0xFFFFF59D, 0xFFFFE082, 0xFFFFCC80, 0xFFFFAB91,
+            0xFFBCAAA4, 0xFFEEEEEE, 0xFFB0BEC5, 0xFFCCFF90,
+    };
+
+    public static final int[] metroColors = {
+            0xFF76FF03, 0xFF60A917, 0xFF00C853, 0xFF00ABA9,
+            0xFF1BA1E2, 0xFF0050EF, 0xFF6A00FF, 0xFFAA00FF,
+            0xFFF472D0, 0xFFD80073, 0xFFA20025, 0xFFE51400,
+            0xFFFA6800, 0xFFF0A30A, 0xFFE3C800, 0xFF795548,
+            0xFF6D8764, 0xFF647687, 0xFF76608A, 0xFFA0522D,
+    };
+
     /**
      * Used for teacher's images (e.g. in messages or announcements).
      * @param s teacher's fullName
@@ -115,6 +138,18 @@ public class Colors {
         return materialColors[getRandomNumberInRange(0, materialColors.length-1, seed)];
     }
 
+    public static int stringToMaterialColorCRC(String s) {
+        long seed;
+        try {
+            CRC32 crc = new CRC32();
+            crc.update(s.getBytes());
+            seed = crc.getValue();
+        } catch (Exception e) {
+            seed = 1234;
+        }
+        return metroColors[(int) (seed % metroColors.length)];
+    }
+
     public static int gradeToColor(Grade grade)
     {
         if (grade.getType() == Grade.TYPE_POINT_SUM) {

app/src/main/res/layout/timetable_config_dialog.xml

@@ -44,6 +44,14 @@
                 android:minHeight="32dp"
                 android:text="@string/timetable_config_show_attendance" />
 
+            <com.google.android.material.checkbox.MaterialCheckBox
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp"
+                android:checked="@={config.timetableColorSubjectName}"
+                android:minHeight="32dp"
+                android:text="@string/timetable_config_color_subject_name" />
+
             <com.google.android.material.checkbox.MaterialCheckBox
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"

app/src/main/res/layout/timetable_lesson.xml

@@ -45,14 +45,15 @@
                 tools:visibility="gone" />
 
             <LinearLayout
+                android:id="@+id/subjectContainer"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_gravity="top"
                 android:baselineAligned="false"
                 android:orientation="horizontal"
                 android:paddingHorizontal="8dp"
-                android:paddingVertical="4dp">
+                android:paddingVertical="4dp"
-                <!--tools:background="@drawable/timetable_subject_color_rounded"-->
+                tools:background="@drawable/timetable_subject_color_rounded">
 
                 <com.mikepenz.iconics.view.IconicsTextView
                     android:id="@+id/subjectName"

app/src/main/res/values/strings.xml

@@ -1540,5 +1540,6 @@
     <string name="menu_timetable_config">Ustawienia planu lekcji</string>
     <string name="timetable_config_show_events">Pokazuj wydarzenia przy lekcjach</string>
     <string name="timetable_config_show_attendance">Pokazuj rodzaj obecności na lekcji</string>
+    <string name="timetable_config_color_subject_name">Koloruj nazwę przedmiotu</string>
     <string name="timetable_config_trim_hour_range">Nie pokazuj godzin bez lekcji</string>
 </resources>