Adds scroll position/scale emulation to DevTools.

third_party/WebKit/Source/web/DevToolsEmulator.cpp

 // Copyright 2015 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 "web/DevToolsEmulator.h"
 
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/frame/VisualViewport.h"
@@ skipping 205 matching lines @@
     if (params.screenPosition == WebDeviceEmulationParams::Mobile)
         enableMobileEmulation();
     else
         disableMobileEmulation();
 
     m_webViewImpl->setCompositorDeviceScaleFactorOverride(params.deviceScaleFactor);
     m_webViewImpl->setRootLayerTransform(WebSize(params.offset.x, params.offset.y), params.scale);
     // TODO(dgozman): mainFrameImpl() is null when it's remote. Figure out how
     // we end up with enabling emulation in this case.
     if (m_webViewImpl->mainFrameImpl()) {
+        m_webViewImpl->mainFrameImpl()->frameView()->layout();
         if (Document* document = m_webViewImpl->mainFrameImpl()->frame()->document())
             document->mediaQueryAffectingValueChanged();
     }
 }
 
 void DevToolsEmulator::disableDeviceEmulation()
 {
     if (!m_deviceMetricsEnabled)
         return;
 
     m_deviceMetricsEnabled = false;
     m_webViewImpl->setBackgroundColorOverride(Color::transparent);
     m_webViewImpl->page()->settings().setDeviceScaleAdjustment(m_embedderDeviceScaleAdjustment);
     disableMobileEmulation();
     m_webViewImpl->setCompositorDeviceScaleFactorOverride(0.f);
     m_webViewImpl->setRootLayerTransform(WebSize(0.f, 0.f), 1.f);
-    m_webViewImpl->setPageScaleFactor(1.f);
+    m_webViewImpl->resetScaleStateImmediately();
     // mainFrameImpl() could be null during cleanup or remote <-> local swap.
     if (m_webViewImpl->mainFrameImpl()) {
+        m_webViewImpl->mainFrameImpl()->frameView()->layout();
         if (Document* document = m_webViewImpl->mainFrameImpl()->frame()->document())
             document->mediaQueryAffectingValueChanged();
     }
 }
 
 bool DevToolsEmulator::resizeIsDeviceSizeChange()
 {
     return m_deviceMetricsEnabled && m_emulateMobileEnabled;
 }
 
@@ skipping 20 matching lines @@
     m_webViewImpl->page()->settings().setAvailablePointerTypes(PointerTypeCoarse);
     m_webViewImpl->page()->settings().setPrimaryPointerType(PointerTypeCoarse);
     m_webViewImpl->page()->settings().setAvailableHoverTypes(HoverTypeOnDemand);
     m_webViewImpl->page()->settings().setPrimaryHoverType(HoverTypeOnDemand);
     m_webViewImpl->page()->settings().setResizeIsDeviceSizeChange(true);
     m_webViewImpl->setZoomFactorOverride(1);
 
     m_originalDefaultMinimumPageScaleFactor = m_webViewImpl->defaultMinimumPageScaleFactor();
     m_originalDefaultMaximumPageScaleFactor = m_webViewImpl->defaultMaximumPageScaleFactor();
     m_webViewImpl->setDefaultPageScaleLimits(0.25f, 5);
-    // TODO(dgozman): mainFrameImpl() is null when it's remote. Figure out how
-    // we end up with enabling emulation in this case.
-    if (m_webViewImpl->mainFrameImpl())
-        m_webViewImpl->mainFrameImpl()->frameView()->layout();
 }
 
 void DevToolsEmulator::disableMobileEmulation()
 {
     if (!m_emulateMobileEnabled)
         return;
     RuntimeEnabledFeatures::setOverlayScrollbarsEnabled(m_isOverlayScrollbarsEnabled);
     RuntimeEnabledFeatures::setOrientationEventEnabled(m_isOrientationEventEnabled);
     RuntimeEnabledFeatures::setMobileLayoutThemeEnabled(m_isMobileLayoutThemeEnabled);
     ComputedStyle::invalidateInitialStyle();
     m_webViewImpl->page()->settings().setViewportEnabled(false);
     m_webViewImpl->page()->settings().setViewportMetaEnabled(false);
     m_webViewImpl->page()->frameHost().visualViewport().initializeScrollbars();
     m_webViewImpl->settings()->setShrinksViewportContentToFit(false);
     m_webViewImpl->page()->settings().setTextAutosizingEnabled(m_embedderTextAutosizingEnabled);
     m_webViewImpl->page()->settings().setPreferCompositingToLCDTextEnabled(m_embedderPreferCompositingToLCDTextEnabled);
     m_webViewImpl->page()->settings().setViewportStyle(m_embedderViewportStyle);
     m_webViewImpl->page()->settings().setPluginsEnabled(m_embedderPluginsEnabled);
     m_webViewImpl->page()->settings().setAvailablePointerTypes(m_embedderAvailablePointerTypes);
     m_webViewImpl->page()->settings().setPrimaryPointerType(m_embedderPrimaryPointerType);
     m_webViewImpl->page()->settings().setAvailableHoverTypes(m_embedderAvailableHoverTypes);
     m_webViewImpl->page()->settings().setPrimaryHoverType(m_embedderPrimaryHoverType);
     m_webViewImpl->page()->settings().setResizeIsDeviceSizeChange(false);
     m_webViewImpl->setZoomFactorOverride(0);
     m_emulateMobileEnabled = false;
     m_webViewImpl->setDefaultPageScaleLimits(
         m_originalDefaultMinimumPageScaleFactor,
         m_originalDefaultMaximumPageScaleFactor);
-    // mainFrameImpl() could be null during cleanup or remote <-> local swap.
-    if (m_webViewImpl->mainFrameImpl())
-        m_webViewImpl->mainFrameImpl()->frameView()->layout();
 }
 
 void DevToolsEmulator::setTouchEventEmulationEnabled(bool enabled)
 {
     if (m_touchEventEmulationEnabled == enabled)
         return;
     if (!m_touchEventEmulationEnabled) {
         m_originalTouchEnabled = RuntimeEnabledFeatures::touchEnabled();
         m_originalDeviceSupportsMouse = m_webViewImpl->page()->settings().deviceSupportsMouse();
         m_originalDeviceSupportsTouch = m_webViewImpl->page()->settings().deviceSupportsTouch();
@@ skipping 52 matching lines @@
             m_lastPinchAnchorCss.reset();
             m_lastPinchAnchorDip.reset();
         }
         return true;
     }
 
     return false;
 }
 
 } // namespace blink