Create `BackButton` helper widget

3 files changed, 84 insertions, 0 deletions

diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/BackButton.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/BackButton.kt
new file mode 100644
index 0000000000..b0ae6024ec
--- /dev/null
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/ui/widget/BackButton.kt
@@ -0,0 +1,71 @@
+package net.mullvad.mullvadvpn.ui.widget
+
+import android.content.Context
+import android.util.AttributeSet
+import android.util.TypedValue
+import android.view.Gravity
+import android.view.LayoutInflater
+import android.widget.LinearLayout
+import android.widget.TextView
+import net.mullvad.mullvadvpn.R
+
+class BackButton : LinearLayout {
+    private val container =
+        context.getSystemService(Context.LAYOUT_INFLATER_SERVICE).let { service ->
+            val inflater = service as LayoutInflater
+
+            inflater.inflate(R.layout.settings_back_button, this)
+        }
+
+    private val label = container.findViewById<TextView>(R.id.label)
+
+    constructor(context: Context) : super(context) {}
+
+    constructor(context: Context, attributes: AttributeSet) : super(context, attributes) {
+        loadAttributes(attributes)
+    }
+
+    constructor(context: Context, attributes: AttributeSet, defaultStyleAttribute: Int) :
+        super(context, attributes, defaultStyleAttribute) {
+            loadAttributes(attributes)
+        }
+
+    constructor(
+        context: Context,
+        attributes: AttributeSet,
+        defaultStyleAttribute: Int,
+        defaultStyleResource: Int
+    ) : super(context, attributes, defaultStyleAttribute, defaultStyleResource) {
+        loadAttributes(attributes)
+    }
+
+    init {
+        isClickable = true
+        gravity = Gravity.CENTER_VERTICAL or Gravity.LEFT
+        orientation = HORIZONTAL
+
+        resources.getDimensionPixelSize(R.dimen.settings_back_button_padding).let { padding ->
+            setPadding(padding, padding, padding, padding)
+        }
+
+        loadBackground()
+    }
+
+    private fun loadAttributes(attributes: AttributeSet) {
+        context.theme.obtainStyledAttributes(attributes, R.styleable.TextAttribute, 0, 0).apply {
+            try {
+                label.text = getString(R.styleable.TextAttribute_text) ?: ""
+            } finally {
+                recycle()
+            }
+        }
+    }
+
+    private fun loadBackground() {
+        val typedValue = TypedValue()
+
+        context.theme.resolveAttribute(android.R.attr.selectableItemBackground, typedValue, true)
+
+        setBackgroundResource(typedValue.resourceId)
+    }
+}
diff --git a/android/src/main/res/layout/settings_back_button.xml b/android/src/main/res/layout/settings_back_button.xml
new file mode 100644
index 0000000000..da8bad7356
--- /dev/null
+++ b/android/src/main/res/layout/settings_back_button.xml
@@ -0,0 +1,12 @@
+<merge xmlns:android="http://schemas.android.com/apk/res/android">
+    <ImageView android:layout_width="24dp"
+               android:layout_height="24dp"
+               android:layout_marginRight="8dp"
+               android:src="@drawable/icon_back" />
+    <TextView android:id="@+id/label"
+              android:layout_width="wrap_content"
+              android:layout_height="wrap_content"
+              android:textColor="@color/white60"
+              android:textSize="13sp"
+              android:textStyle="bold" />
+</merge>
diff --git a/android/src/main/res/values/dimensions.xml b/android/src/main/res/values/dimensions.xml
index 197cb92ecb..99a79846f5 100644
--- a/android/src/main/res/values/dimensions.xml
+++ b/android/src/main/res/values/dimensions.xml
@@ -14,4 +14,5 @@
     <dimen name="cell_switch_knob_margin">4dp</dimen>
     <dimen name="cell_switch_knob_max_translation">20dp</dimen>
     <dimen name="cell_switch_knob_size">24dp</dimen>
+    <dimen name="settings_back_button_padding">12dp</dimen>
 </resources>