Adapt message when all habits are completed

Closes #700.

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/ListHabitsRootView.kt

@@ -140,9 +140,14 @@ class ListHabitsRootView @Inject constructor(
     }
 
     private fun updateEmptyView() {
-        llEmpty.visibility = when (listAdapter.itemCount) {
+        if (listAdapter.itemCount == 0) {
-            0 -> VISIBLE
+            if (listAdapter.hasNoHabit()) {
-            else -> GONE
+                llEmpty.showEmpty()
+            } else {
+                llEmpty.showDone()
+            }
+        } else {
+            llEmpty.hide()
         }
     }
 }

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/EmptyListView.kt

@@ -34,32 +34,54 @@ import org.isoron.uhabits.utils.sres
 import org.isoron.uhabits.utils.str
 
 class EmptyListView(context: Context) : LinearLayout(context) {
+    var textTextView: TextView
+    var iconTextView: TextView
+
     init {
         orientation = VERTICAL
         gravity = CENTER
         visibility = View.GONE
 
-        addView(
+        iconTextView = TextView(context).apply {
-            TextView(context).apply {
             text = str(R.string.fa_star_half_o)
             typeface = getFontAwesome()
             textSize = sp(40.0f)
             gravity = CENTER
             setTextColor(sres.getColor(R.attr.mediumContrastTextColor))
-            },
+        }
+
+        addView(
+            iconTextView,
             MATCH_PARENT,
             WRAP_CONTENT
         )
 
-        addView(
+        textTextView = TextView(context).apply {
-            TextView(context).apply {
             text = str(R.string.no_habits_found)
             gravity = CENTER
             setPadding(0, dp(20.0f).toInt(), 0, 0)
             setTextColor(sres.getColor(R.attr.mediumContrastTextColor))
-            },
+        }
+        addView(
+            textTextView,
             MATCH_PARENT,
             WRAP_CONTENT
         )
     }
+
+    fun showDone() {
+        visibility = VISIBLE
+        iconTextView.text = str(R.string.fa_umbrella_beach)
+        textTextView.text = str(R.string.no_habits_left_to_do)
+    }
+
+    fun showEmpty() {
+        visibility = VISIBLE
+        iconTextView.text = str(R.string.fa_star_half_o)
+        textTextView.text = str(R.string.no_habits_found)
+    }
+
+    fun hide() {
+        visibility = GONE
+    }
 }

uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/list/views/HabitCardListAdapter.kt

@@ -62,6 +62,10 @@ class HabitCardListAdapter @Inject constructor(
         cache.cancelTasks()
     }
 
+    fun hasNoHabit(): Boolean {
+        return cache.hasNoHabit()
+    }
+
     /**
      * Sets all items as not selected.
      */

uhabits-android/src/main/res/values/fontawesome.xml

@@ -28,6 +28,7 @@
 	<string translatable="false" name="fa_calendar">&#xf073;</string>
 	<string translatable="false" name="fa_exclamation_circle">&#xf06a;</string>
 	<string translatable="false" name="fa_question">&#xf128;</string>
+	<string translatable="false" name="fa_umbrella_beach">&#xf5ca;</string>
 
     <!--<string translatable="false" name="fa_glass">&#xf000;</string>-->
 	<!--<string translatable="false" name="fa_music">&#xf001;</string>-->

uhabits-android/src/main/res/values/strings.xml

@@ -59,6 +59,7 @@
     <string name="save">Save</string>
     <string name="streaks">Streaks</string>
     <string name="no_habits_found">You have no active habits</string>
+    <string name="no_habits_left_to_do">You\'re all done for today!</string>
     <string name="long_press_to_toggle">Press-and-hold to check or uncheck</string>
     <string name="reminder_off">Off</string>
     <string name="create_habit">Create habit</string>

uhabits-core/src/jvmMain/java/org/isoron/uhabits/core/ui/screens/habits/list/HabitCardListCache.kt

@@ -73,6 +73,11 @@ class HabitCardListCache @Inject constructor(
         return data.checkmarks[habitId]!!
     }
 
+    @Synchronized
+    fun hasNoHabit(): Boolean {
+        return allHabits.isEmpty
+    }
+
     /**
      * Returns the habits that occupies a certain position on the list.
      *