Revert "Make window.scroll properties relative to the layout viewport by default."

third_party/WebKit/Source/web/tests/VisualViewportTest.cpp

 // Copyright 2014 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.
 
 #include "core/frame/VisualViewport.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 1104 matching lines @@
     Mock::VerifyAndClearExpectations(&mockWebFrameClient);
 
     // Scroll horizontally.
     EXPECT_CALL(mockWebFrameClient, didChangeScrollOffset(_));
     visualViewport.setLocation(FloatPoint(70, 90));
 
     // Reset the old client so destruction can occur naturally.
     webViewImpl()->mainFrameImpl()->setClient(oldClient);
 }
 
+// Tests that calling scroll into view on a visible element doesn cause
+// a scroll due to a fractional offset. Bug crbug.com/463356.
+TEST_P(ParameterizedVisualViewportTest, ScrollIntoViewFractionalOffset)
+{
+    initializeWithAndroidSettings();
+
+    webViewImpl()->resize(IntSize(1000, 1000));
+
+    registerMockedHttpURLLoad("scroll-into-view.html");
+    navigateTo(m_baseURL + "scroll-into-view.html");
+
+    FrameView& frameView = *webViewImpl()->mainFrameImpl()->frameView();
+    ScrollableArea* layoutViewportScrollableArea = frameView.layoutViewportScrollableArea();
+    VisualViewport& visualViewport = frame()->page()->frameHost().visualViewport();
+    Element* inputBox = frame()->document()->getElementById("box");
+
+    webViewImpl()->setPageScaleFactor(2);
+
+    // The element is already in the view so the scrollIntoView shouldn't move
+    // the viewport at all.
+    webViewImpl()->setVisualViewportOffset(WebFloatPoint(250.25f, 100.25f));
+    layoutViewportScrollableArea->setScrollPosition(DoublePoint(0, 900.75), ProgrammaticScroll);
+    inputBox->scrollIntoViewIfNeeded(false);
+
+    EXPECT_POINT_EQ(DoublePoint(0, 900.75), layoutViewportScrollableArea->scrollPositionDouble());
+    EXPECT_POINT_EQ(FloatPoint(250.25f, 100.25f), visualViewport.location());
+
+    // Change the fractional part of the frameview to one that would round down.
+    layoutViewportScrollableArea->setScrollPosition(DoublePoint(0, 900.125), ProgrammaticScroll);
+    inputBox->scrollIntoViewIfNeeded(false);
+
+    EXPECT_POINT_EQ(DoublePoint(0, 900.125), layoutViewportScrollableArea->scrollPositionDouble());
+    EXPECT_POINT_EQ(FloatPoint(250.25f, 100.25f), visualViewport.location());
+
+    // Repeat both tests above with the visual viewport at a high fractional.
+    webViewImpl()->setVisualViewportOffset(WebFloatPoint(250.875f, 100.875f));
+    layoutViewportScrollableArea->setScrollPosition(DoublePoint(0, 900.75), ProgrammaticScroll);
+    inputBox->scrollIntoViewIfNeeded(false);
+
+    EXPECT_POINT_EQ(DoublePoint(0, 900.75), layoutViewportScrollableArea->scrollPositionDouble());
+    EXPECT_POINT_EQ(FloatPoint(250.875f, 100.875f), visualViewport.location());
+
+    // Change the fractional part of the frameview to one that would round down.
+    layoutViewportScrollableArea->setScrollPosition(DoublePoint(0, 900.125), ProgrammaticScroll);
+    inputBox->scrollIntoViewIfNeeded(false);
+
+    EXPECT_POINT_EQ(DoublePoint(0, 900.125), layoutViewportScrollableArea->scrollPositionDouble());
+    EXPECT_POINT_EQ(FloatPoint(250.875f, 100.875f), visualViewport.location());
+
+    // Both viewports with a 0.5 fraction.
+    webViewImpl()->setVisualViewportOffset(WebFloatPoint(250.5f, 100.5f));
+    layoutViewportScrollableArea->setScrollPosition(DoublePoint(0, 900.5), ProgrammaticScroll);
+    inputBox->scrollIntoViewIfNeeded(false);
+
+    EXPECT_POINT_EQ(DoublePoint(0, 900.5), layoutViewportScrollableArea->scrollPositionDouble());
+    EXPECT_POINT_EQ(FloatPoint(250.5f, 100.5f), visualViewport.location());
+}
+
 // Top controls can make an unscrollable page temporarily scrollable, causing
 // a scroll clamp when the page is resized. Make sure this bug is fixed.
 // crbug.com/437620
 MAYBE_TEST_F(TestResizeDoesntChangeScrollOffset)
 {
     initializeWithAndroidSettings();
     webViewImpl()->resize(IntSize(980, 650));
 
     navigateTo("about:blank");
 
@@ skipping 276 matching lines @@
     IntRect expectedBounds = bounds;
     expectedBounds.scale(2.f);
     IntPoint expectedScrollDelta = scrollDelta;
     expectedScrollDelta.scale(2.f, 2.f);
 
     EXPECT_POINT_EQ(IntPoint(expectedBounds.location() - expectedScrollDelta),
         boundsInViewport.location());
     EXPECT_SIZE_EQ(expectedBounds.size(), boundsInViewport.size());
 }
 
+// Test that the various window.scroll and document.body.scroll properties and
+// methods work unchanged from the pre-virtual viewport mode.
+TEST_P(ParameterizedVisualViewportTest, bodyAndWindowScrollPropertiesAccountForViewport)
+{
+    initializeWithAndroidSettings();
+
+    webViewImpl()->resize(IntSize(200, 300));
+
+    // Load page with no main frame scrolling.
+    registerMockedHttpURLLoad("200-by-300-viewport.html");
+    navigateTo(m_baseURL + "200-by-300-viewport.html");
+
+    VisualViewport& visualViewport = frame()->page()->frameHost().visualViewport();
+    visualViewport.setScale(2);
+
+    // Chrome's quirky behavior regarding viewport scrolling means we treat the
+    // body element as the viewport and don't apply scrolling to the HTML
+    // element.
+    RuntimeEnabledFeatures::setScrollTopLeftInteropEnabled(false);
+
+    LocalDOMWindow* window = webViewImpl()->mainFrameImpl()->frame()->localDOMWindow();
+    window->scrollTo(100, 150);
+    EXPECT_EQ(100, window->scrollX());
+    EXPECT_EQ(150, window->scrollY());
+    EXPECT_FLOAT_POINT_EQ(FloatPoint(100, 150), visualViewport.location());
+
+    HTMLElement* body = toHTMLBodyElement(window->document()->body());
+    body->setScrollLeft(50);
+    body->setScrollTop(130);
+    EXPECT_EQ(50, body->scrollLeft());
+    EXPECT_EQ(130, body->scrollTop());
+    EXPECT_FLOAT_POINT_EQ(FloatPoint(50, 130), visualViewport.location());
+
+    HTMLElement* documentElement = toHTMLElement(window->document()->documentElement());
+    documentElement->setScrollLeft(40);
+    documentElement->setScrollTop(50);
+    EXPECT_EQ(0, documentElement->scrollLeft());
+    EXPECT_EQ(0, documentElement->scrollTop());
+    EXPECT_FLOAT_POINT_EQ(FloatPoint(50, 130), visualViewport.location());
+
+    visualViewport.setLocation(FloatPoint(10, 20));
+    EXPECT_EQ(10, body->scrollLeft());
+    EXPECT_EQ(20, body->scrollTop());
+    EXPECT_EQ(0, documentElement->scrollLeft());
+    EXPECT_EQ(0, documentElement->scrollTop());
+    EXPECT_EQ(10, window->scrollX());
+    EXPECT_EQ(20, window->scrollY());
+
+    // Turning on the standards-compliant viewport scrolling impl should make
+    // the document element the viewport and not body.
+    RuntimeEnabledFeatures::setScrollTopLeftInteropEnabled(true);
+
+    window->scrollTo(100, 150);
+    EXPECT_EQ(100, window->scrollX());
+    EXPECT_EQ(150, window->scrollY());
+    EXPECT_FLOAT_POINT_EQ(FloatPoint(100, 150), visualViewport.location());
+
+    body->setScrollLeft(50);
+    body->setScrollTop(130);
+    EXPECT_EQ(0, body->scrollLeft());
+    EXPECT_EQ(0, body->scrollTop());
+    EXPECT_FLOAT_POINT_EQ(FloatPoint(100, 150), visualViewport.location());
+
+    documentElement->setScrollLeft(40);
+    documentElement->setScrollTop(50);
+    EXPECT_EQ(40, documentElement->scrollLeft());
+    EXPECT_EQ(50, documentElement->scrollTop());
+    EXPECT_FLOAT_POINT_EQ(FloatPoint(40, 50), visualViewport.location());
+
+    visualViewport.setLocation(FloatPoint(10, 20));
+    EXPECT_EQ(0, body->scrollLeft());
+    EXPECT_EQ(0, body->scrollTop());
+    EXPECT_EQ(10, documentElement->scrollLeft());
+    EXPECT_EQ(20, documentElement->scrollTop());
+    EXPECT_EQ(10, window->scrollX());
+    EXPECT_EQ(20, window->scrollY());
+}
+
 // Tests that when a new frame is created, it is created with the intended
 // size (i.e. viewport at minimum scale, 100x200 / 0.5).
 MAYBE_TEST_P(TestMainFrameInitializationSizing)
 {
     initializeWithAndroidSettings();
 
     webViewImpl()->resize(IntSize(100, 200));
 
     registerMockedHttpURLLoad("content-width-1000-min-scale.html");
     navigateTo(m_baseURL + "content-width-1000-min-scale.html");
@@ skipping 184 matching lines @@
     webViewImpl()->handleInputEvent(pinchUpdate);
 
     VisualViewport& visualViewport = webViewImpl()->page()->frameHost().visualViewport();
     FrameView& frameView = *webViewImpl()->mainFrameImpl()->frameView();
 
     EXPECT_FLOAT_POINT_EQ(FloatPoint(50, 50), visualViewport.location());
     EXPECT_FLOAT_POINT_EQ(FloatPoint(0, 0), frameView.scrollPositionDouble());
 }
 
 } // namespace