[Android] Upstream content detection and ChromeBrowserProvider tests.

content/public/test/android/javatests/src/org/chromium/content/browser/test/util/DOMUtils.java

Index: content/public/test/android/javatests/src/org/chromium/content/browser/test/util/DOMUtils.java
diff --git a/content/public/test/android/javatests/src/org/chromium/content/browser/test/util/DOMUtils.java b/content/public/test/android/javatests/src/org/chromium/content/browser/test/util/DOMUtils.java
new file mode 100644
index 0000000000000000000000000000000000000000..fcac2b4378b3f7e50a2c1808bfe6766f4d83edab
--- /dev/null
+++ b/content/public/test/android/javatests/src/org/chromium/content/browser/test/util/DOMUtils.java
@@ -0,0 +1,120 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.content.browser.test.util;
+
+import android.graphics.Rect;
+import android.test.ActivityInstrumentationTestCase2;
+import android.test.InstrumentationTestCase;
+import android.util.JsonReader;
+
+import java.io.IOException;
+import java.io.StringReader;
+
+import junit.framework.Assert;
+
+import org.chromium.content.browser.ContentView;
+
+/**
+ * Collection of DOM-based utilities.
+ */
+public class DOMUtils {
+
+    /**
+     * Returns the rect boundaries for a node by its id.
+     */
+    public static Rect getNodeBounds(InstrumentationTestCase test, final ContentView view,
+            TestCallbackHelperContainer viewClient, String nodeId) throws Throwable {
+        StringBuilder sb = new StringBuilder();
+        sb.append("(function() {");
+        sb.append("  var node = document.getElementById('" + nodeId + "');");
+        sb.append("  if (!node) return null;");
+        sb.append("  var width = node.offsetWidth;");
+        sb.append("  var height = node.offsetHeight;");
+        sb.append("  var x = -window.scrollX;");
+        sb.append("  var y = -window.scrollY;");
+        sb.append("  do {");
+        sb.append("    x += node.offsetLeft;");
+        sb.append("    y += node.offsetTop;");
+        sb.append("  } while (node = node.offsetParent);");
+        sb.append("  return [ x, y, width, height ];");
+        sb.append("})();");
+
+        String jsonText = JavaScriptUtils.executeJavaScriptAndWaitForResult(test, view, viewClient,
+                sb.toString());
+
+        Assert.assertFalse("Failed to retrieve bounds for " + nodeId,
+                jsonText.trim().equalsIgnoreCase("null"));
+
+        JsonReader jsonReader = new JsonReader(new StringReader(jsonText));
+        int[] bounds = new int[4];
+        try {
+            jsonReader.beginArray();
+            int i = 0;
+            while (jsonReader.hasNext()) {
+                bounds[i++] = jsonReader.nextInt();
+            }
+            jsonReader.endArray();
+            Assert.assertEquals("Invalid bounds returned.", 4, i);
+        } catch (IOException exception) {
+            Assert.fail("Failed to evaluate JavaScript: " + jsonText + "\n" + exception);
+        }
+        return new Rect(bounds[0], bounds[1], bounds[0] + bounds[2], bounds[1] + bounds[3]);
+    }
+
+    /**
+     * Click a DOM node by its id.
+     */
+    public static void clickNode(ActivityInstrumentationTestCase2 activityTestCase,
+            final ContentView view, TestCallbackHelperContainer viewClient, String nodeId)
+            throws Throwable {
+        Rect bounds = getNodeBounds(activityTestCase, view, viewClient, nodeId);
+        Assert.assertNotNull("Failed to get DOM element bounds of '" + nodeId + "'.'", bounds);
+
+        // TODO(leandrogracia): make this use view.getScale() once the correct value is available.
+        // WARNING: this will only work with a viewport fixed scale value of 1.0.
+        float scale = getDevicePixelRatio(activityTestCase, view, viewClient);
+        int clickX = (int)(bounds.exactCenterX() * scale + 0.5);
+        int clickY = (int)(bounds.exactCenterY() * scale + 0.5);
+
+        TouchCommon touchCommon = new TouchCommon(activityTestCase.getActivity());
+        touchCommon.singleClickView(view, clickX, clickY);
+    }
+
+    /**
+     * Long-press a DOM node by its id.
+     */
+    public static void longPressNode(ActivityInstrumentationTestCase2 activityTestCase,
+            final ContentView view, TestCallbackHelperContainer viewClient, String nodeId)
+            throws Throwable {
+        Rect bounds = getNodeBounds(activityTestCase, view, viewClient, nodeId);
+        Assert.assertNotNull("Failed to get DOM element bounds of '" + nodeId + "'.'", bounds);
+
+        // TODO(leandrogracia): make this use view.getScale() once the correct value is available.
+        // WARNING: this will only work with a viewport fixed scale value of 1.0.
+        float scale = getDevicePixelRatio(activityTestCase, view, viewClient);
+        int clickX = (int)(bounds.exactCenterX() * scale + 0.5);
+        int clickY = (int)(bounds.exactCenterY() * scale + 0.5);
+
+        TouchCommon touchCommon = new TouchCommon(activityTestCase.getActivity());
+        touchCommon.longPressView(view, clickX, clickY);
+    }
+
+    /**
+     * Scrolls the view to ensure that the required DOM node is visible.
+     */
+    public static void scrollNodeIntoView(InstrumentationTestCase test, final ContentView view,
+            TestCallbackHelperContainer viewClient, String nodeId) throws Throwable {
+        JavaScriptUtils.executeJavaScriptAndWaitForResult(test, view, viewClient,
+                "document.getElementById('" + nodeId + "').scrollIntoView()");
+    }
+
+    // This is a temporary workaround to make clickNode and longPressNode work under fixed viewport
+    // scale settings of 1.0 until the new compositor correctly provides the ContentView page scale.
+    private static float getDevicePixelRatio(InstrumentationTestCase test, final ContentView view,
+            TestCallbackHelperContainer viewClient) throws Throwable {
+        return Float.valueOf(JavaScriptUtils.executeJavaScriptAndWaitForResult(test, view,
+                viewClient, "window.devicePixelRatio"));
+    }
+}