Enhancement/fragment interface (#564)

* Begin fragment interfaces and themable contracts

* Prepare swiperefresh interface

* Snapshot

* Add compilable version

* Revamp once more

* Finalize layouts

* Cleanup

1 files changed, 144 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..e6e1f0e2
--- /dev/null
+++ b/app/src/main/kotlin/com/pitchedapps/frost/views/FrostWebView.kt
@@ -0,0 +1,144 @@
+package com.pitchedapps.frost.views
+
+import android.animation.ValueAnimator
+import android.annotation.SuppressLint
+import android.content.Context
+import android.graphics.Color
+import android.util.AttributeSet
+import android.view.View
+import android.view.animation.DecelerateInterpolator
+import com.pitchedapps.frost.contracts.FrostContentContainer
+import com.pitchedapps.frost.contracts.FrostContentCore
+import com.pitchedapps.frost.contracts.FrostContentParent
+import com.pitchedapps.frost.facebook.USER_AGENT_BASIC
+import com.pitchedapps.frost.fragments.WebFragment
+import com.pitchedapps.frost.utils.Prefs
+import com.pitchedapps.frost.utils.frostDownload
+import com.pitchedapps.frost.web.*
+
+/**
+ * Created by Allan Wang on 2017-05-29.
+ *
+ */
+class FrostWebView @JvmOverloads constructor(
+        context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
+) : NestedWebView(context, attrs, defStyleAttr),
+        FrostContentCore {
+
+    override fun reload(animate: Boolean) {
+        parent.registerTransition(animate)
+        super.reload()
+    }
+
+    override lateinit var parent: FrostContentParent
+
+    internal lateinit var frostWebClient: FrostWebViewClient
+
+    override val currentUrl: String
+        get() = url ?: ""
+
+    @SuppressLint("SetJavaScriptEnabled")
+    override fun bind(container: FrostContentContainer): View {
+        with(settings) {
+            javaScriptEnabled = true
+            if (parent.baseUrl.shouldUseBasicAgent)
+                userAgentString = USER_AGENT_BASIC
+            allowFileAccess = true
+            textZoom = Prefs.webTextScaling
+        }
+        setLayerType(LAYER_TYPE_HARDWARE, null)
+        // attempt to get custom client; otherwise fallback to original
+        frostWebClient = (container as? WebFragment)?.client(this) ?: FrostWebViewClient(this)
+        webViewClient = frostWebClient
+        webChromeClient = FrostChromeClient(this)
+        addJavascriptInterface(FrostJSI(this), "Frost")
+        setBackgroundColor(Color.TRANSPARENT)
+        setDownloadListener(context::frostDownload)
+        return this
+    }
+
+
+    /**
+     * Wrapper to the main userAgentString to cache it.
+     * This decouples it from the UiThread
+     *
+     * Note that this defaults to null, but the main purpose is to
+     * check if we've set our own agent.
+     *
+     * A null value may be interpreted as the default value
+     */
+    var userAgentString: String? = null
+        set(value) {
+            field = value
+            settings.userAgentString = value
+        }
+
+    init {
+        isNestedScrollingEnabled = true
+    }
+
+    fun loadUrl(url: String?, animate: Boolean) {
+        if (url == null) return
+        parent.registerTransition(animate)
+        super.loadUrl(url)
+    }
+
+    override fun reloadBase(animate: Boolean) {
+        loadUrl(parent.baseUrl, animate)
+    }
+
+    override fun onBackPressed(): Boolean {
+        if (canGoBack()) {
+            goBack()
+            return true
+        }
+        return false
+    }
+
+    /**
+     * If webview is already at the top, refresh
+     * Otherwise scroll to top
+     */
+    override fun onTabClicked() {
+        if (scrollY < 5) reloadBase(true)
+        else scrollToTop()
+    }
+
+    private fun scrollToTop() {
+        flingScroll(0, 0) // stop fling
+        if (scrollY > 10000) {
+            scrollTo(0, 0)
+        } else {
+            ValueAnimator.ofInt(scrollY, 0).apply {
+                duration = Math.min(scrollY, 500).toLong()
+                interpolator = DecelerateInterpolator()
+                addUpdateListener { scrollY = it.animatedValue as Int }
+                start()
+            }
+        }
+    }
+
+    override var active: Boolean = true
+        set(value) {
+            if (field == value) return
+            field = value
+            // todo
+        }
+
+    override fun reloadTheme() {
+        reloadThemeSelf()
+    }
+
+    override fun reloadThemeSelf() {
+        reload(false) // todo see if there's a better solution
+    }
+
+    override fun reloadTextSize() {
+        reloadTextSizeSelf()
+    }
+
+    override fun reloadTextSizeSelf() {
+        settings.textZoom = Prefs.webTextScaling
+    }
+
+}
\ No newline at end of file