initial port

1 files changed, 138 insertions, 0 deletions

diff --git a/app/src/main/kotlin/com/pitchedapps/frost/views/FrostWebView.kt b/app/src/main/kotlin/com/pitchedapps/frost/views/FrostWebView.kt
new file mode 100644
index 00000000..e7314c20
--- /dev/null
+++ b/app/src/main/kotlin/com/pitchedapps/frost/views/FrostWebView.kt
@@ -0,0 +1,138 @@
+package com.pitchedapps.frost.views
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.graphics.Bitmap
+import android.support.v4.view.MotionEventCompat
+import android.support.v4.view.NestedScrollingChild
+import android.support.v4.view.NestedScrollingChildHelper
+import android.support.v4.view.ViewCompat
+import android.util.AttributeSet
+import android.view.MotionEvent
+import android.view.View
+import android.webkit.WebResourceError
+import android.webkit.WebResourceRequest
+import android.webkit.WebView
+import android.webkit.WebViewClient
+import com.pitchedapps.frost.utils.L
+import io.reactivex.subjects.BehaviorSubject
+import io.reactivex.subjects.Subject
+
+enum class WebStatus {
+    LOADING, LOADED, ERROR
+}
+
+/**
+ * Created by Allan Wang on 2017-05-29.
+ *
+ * Courtesy of takahirom
+ *
+ * https://github.com/takahirom/webview-in-coordinatorlayout/blob/master/app/src/main/java/com/github/takahirom/webview_in_coodinator_layout/NestedWebView.java
+ */
+class FrostWebView @JvmOverloads constructor(
+        context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
+) : WebView(context, attrs, defStyleAttr), NestedScrollingChild {
+
+    private val childHelper = NestedScrollingChildHelper(this)
+    private var lastY: Int = 0
+    private val scrollOffset = IntArray(2)
+    private val scrollConsumed = IntArray(2)
+    private var nestedOffsetY: Int = 0
+    val observable: Subject<WebStatus>
+
+    init {
+        isNestedScrollingEnabled = true
+        observable = BehaviorSubject.create<WebStatus>()
+        setupWebview()
+    }
+
+    @SuppressLint("SetJavaScriptEnabled")
+    fun setupWebview() {
+        settings.javaScriptEnabled = true
+        setLayerType(View.LAYER_TYPE_HARDWARE, null)
+        setWebViewClient(object : WebViewClient() {
+            override fun onReceivedError(view: WebView?, request: WebResourceRequest?, error: WebResourceError?) {
+                super.onReceivedError(view, request, error)
+                observable.onNext(WebStatus.ERROR)
+                L.e("Error ${request}")
+            }
+
+            override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
+                super.onPageStarted(view, url, favicon)
+                observable.onNext(WebStatus.LOADING)
+            }
+
+            override fun onPageFinished(view: WebView?, url: String?) {
+                super.onPageFinished(view, url)
+                observable.onNext(WebStatus.LOADED)
+//                CookieManager.getInstance().flush()
+            }
+        })
+    }
+
+    override fun onTouchEvent(ev: MotionEvent): Boolean {
+        val event = MotionEvent.obtain(ev)
+        val action = MotionEventCompat.getActionMasked(event)
+        if (action == MotionEvent.ACTION_DOWN)
+            nestedOffsetY = 0
+        val eventY = event.y.toInt()
+        event.offsetLocation(0f, nestedOffsetY.toFloat())
+        val returnValue: Boolean
+        when (action) {
+            MotionEvent.ACTION_MOVE -> {
+                var deltaY = lastY - eventY
+                // NestedPreScroll
+                if (dispatchNestedPreScroll(0, deltaY, scrollConsumed, scrollOffset)) {
+                    deltaY -= scrollConsumed[1]
+                    event.offsetLocation(0f, -scrollOffset[1].toFloat())
+                    nestedOffsetY += scrollOffset[1]
+                }
+                lastY = eventY - scrollOffset[1]
+                returnValue = super.onTouchEvent(event)
+                // NestedScroll
+                if (dispatchNestedScroll(0, scrollOffset[1], 0, deltaY, scrollOffset)) {
+                    event.offsetLocation(0f, scrollOffset[1].toFloat())
+                    nestedOffsetY += scrollOffset[1]
+                    lastY -= scrollOffset[1]
+                }
+            }
+            MotionEvent.ACTION_DOWN -> {
+                returnValue = super.onTouchEvent(event)
+                lastY = eventY
+                startNestedScroll(ViewCompat.SCROLL_AXIS_VERTICAL)
+            }
+            MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
+                returnValue = super.onTouchEvent(event)
+                stopNestedScroll()
+            }
+            else -> return false
+        }
+        return returnValue
+    }
+
+    // Nested Scroll implements
+    override fun setNestedScrollingEnabled(enabled: Boolean) {
+        childHelper.isNestedScrollingEnabled = enabled
+    }
+
+    override fun isNestedScrollingEnabled() = childHelper.isNestedScrollingEnabled
+
+    override fun startNestedScroll(axes: Int) = childHelper.startNestedScroll(axes)
+
+    override fun stopNestedScroll() = childHelper.stopNestedScroll()
+
+    override fun hasNestedScrollingParent() = childHelper.hasNestedScrollingParent()
+
+    override fun dispatchNestedScroll(dxConsumed: Int, dyConsumed: Int, dxUnconsumed: Int, dyUnconsumed: Int, offsetInWindow: IntArray?)
+            = childHelper.dispatchNestedScroll(dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, offsetInWindow)
+
+    override fun dispatchNestedPreScroll(dx: Int, dy: Int, consumed: IntArray?, offsetInWindow: IntArray?)
+            = childHelper.dispatchNestedPreScroll(dx, dy, consumed, offsetInWindow)
+
+    override fun dispatchNestedFling(velocityX: Float, velocityY: Float, consumed: Boolean)
+            = childHelper.dispatchNestedFling(velocityX, velocityY, consumed)
+
+    override fun dispatchNestedPreFling(velocityX: Float, velocityY: Float)
+            = childHelper.dispatchNestedPreFling(velocityX, velocityY)
+
+}
\ No newline at end of file