Support position attribute

Author: konifar

library/src/main/java/co/kyash/targetinstructions/AbstractTargetBuilder.kt

@@ -25,6 +25,8 @@ abstract class AbstractTargetBuilder<T : AbstractTargetBuilder<T, S>, S : Target
     internal var highlightPaddingRight = 0f
     internal var highlightPaddingBottom = 0f
 
+    internal var positionType: Target.Position? = null
+
     internal var startDelayMillis = 0L
 
     internal abstract fun self(): T
@@ -60,6 +62,11 @@ abstract class AbstractTargetBuilder<T : AbstractTargetBuilder<T, S>, S : Target
         }
     }
 
+    fun setPositionType(positionType: Target.Position): T {
+        this.positionType = positionType
+        return self()
+    }
+
     fun setStartDelayMillis(startDelayMillis: Long): T {
         this.startDelayMillis = startDelayMillis
         return self()

library/src/main/java/co/kyash/targetinstructions/targets/SimpleTarget.kt

@@ -28,6 +28,7 @@ class SimpleTarget(
         override val messageView: View,
         override val targetView: View? = null,
         override val delay: Long = 0L,
+        override var positionType: Position? = null,
         private val messageAnimationDuration: Long = 300L,
         private val messageInterpolator: Interpolator,
         private val listener: OnStateChangedListener?
@@ -43,11 +44,11 @@ class SimpleTarget(
         highlightPaddingBottom,
         messageView,
         targetView,
-        delay
+        delay,
+        positionType
 ) {
 
     override fun showImmediately() {
-        val positionType = decideMessagePositionType()
         val container = messageView.findViewById<LinearLayout>(R.id.container)
         val topCaret = container.findViewById<ImageView>(R.id.top_caret)
         val bottomCaret = container.findViewById<ImageView>(R.id.bottom_caret)
@@ -166,6 +167,7 @@ class SimpleTarget(
                         messageView = messageView,
                         targetView = targetView,
                         delay = startDelayMillis,
+                        positionType = positionType,
                         messageAnimationDuration = messageAnimationDuration,
                         messageInterpolator = messageInterpolator,
                         listener = listener

library/src/main/java/co/kyash/targetinstructions/targets/Target.kt

@@ -19,21 +19,22 @@ abstract class Target(
         open val highlightPaddingBottom: Float,
         open val messageView: View,
         open val targetView: View? = null,
-        open val delay: Long = 0L
+        open val delay: Long = 0L,
+        open var positionType: Position? = null
 ) {
 
     private val targetPaint = Paint().apply {
         xfermode = PorterDuffXfermode(PorterDuff.Mode.CLEAR)
     }
 
-    internal enum class Position {
-        ABOVE,
-        BELOW
-    }
-
     internal fun show() {
         Handler().postDelayed({
             updateCoordinate()
+
+            if (positionType == null) {
+                positionType = decideMessagePositionType()
+            }
+
             showImmediately()
         }, delay)
     }
@@ -68,7 +69,7 @@ abstract class Target(
 
     internal open fun canClick(): Boolean = true
 
-    internal fun decideMessagePositionType(): Position {
+    private fun decideMessagePositionType(): Position {
         val screenSize = Point()
         (messageView.context.getSystemService(Context.WINDOW_SERVICE) as WindowManager).defaultDisplay.getSize(screenSize)
         return if (top > screenSize.y - (top + height)) Position.ABOVE else Position.BELOW
@@ -82,4 +83,9 @@ abstract class Target(
         fun onClosed()
     }
 
+    enum class Position {
+        ABOVE,
+        BELOW
+    }
+
 }