[DevTools] Disable touch emulation on devices with touch input.

Source/core/inspector/InspectorPageAgent.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 324 matching lines @@
     , m_page(page)
     , m_injectedScriptManager(injectedScriptManager)
     , m_client(client)
     , m_frontend(0)
     , m_overlay(overlay)
     , m_lastScriptIdentifier(0)
     , m_enabled(false)
     , m_ignoreScriptsEnabledNotification(false)
     , m_deviceMetricsOverridden(false)
     , m_emulateViewportEnabled(false)
+    , m_touchEmulationEnabled(false)
+    , m_originalTouchEnabled(false)
+    , m_originalDeviceSupportsMouse(false)
+    , m_originalDeviceSupportsTouch(false)
     , m_embedderTextAutosizingEnabled(m_page->settings().textAutosizingEnabled())
     , m_embedderFontScaleFactor(m_page->settings().deviceScaleAdjustment())
 {
 }
 
 void InspectorPageAgent::setTextAutosizingEnabled(bool enabled)
 {
     m_embedderTextAutosizingEnabled = enabled;
     if (!m_deviceMetricsOverridden)
         m_page->settings().setTextAutosizingEnabled(enabled);
 }
 
 void InspectorPageAgent::setDeviceScaleAdjustment(float deviceScaleAdjustment)
 {
     m_embedderFontScaleFactor = deviceScaleAdjustment;
     if (!m_deviceMetricsOverridden)
         m_page->settings().setDeviceScaleAdjustment(deviceScaleAdjustment);
 }
 
 void InspectorPageAgent::setFrontend(InspectorFrontend* frontend)
 {
     m_frontend = frontend->page();
 }
 
 void InspectorPageAgent::clearFrontend()
 {
     ErrorString error;
     disable(&error);
-    updateTouchEventEmulationInPage(false);
     m_frontend = 0;
 }
 
 void InspectorPageAgent::restore()
 {
     if (m_state->getBoolean(PageAgentState::pageAgentEnabled)) {
         ErrorString error;
         enable(&error);
         bool scriptExecutionDisabled = m_state->getBoolean(PageAgentState::pageAgentScriptExecutionDisabled);
         setScriptExecutionDisabled(0, scriptExecutionDisabled);
@@ skipping 45 matching lines @@
     m_deviceMetricsOverridden = false;
 
     setShowPaintRects(0, false);
     setShowDebugBorders(0, false);
     setShowFPSCounter(0, false);
     setEmulatedMedia(0, String());
     setContinuousPaintingEnabled(0, false);
     setShowScrollBottleneckRects(0, false);
     setShowViewportSizeOnResize(0, false, 0);
 
+    if (m_state->getBoolean(PageAgentState::touchEventEmulationEnabled)) {
+        updateTouchEventEmulationInPage(false);
+        m_state->setBoolean(PageAgentState::touchEventEmulationEnabled, false);
+    }
+
     if (!deviceMetricsChanged(0, 0, 0, false, false, 1, false))
         return;
 
     // When disabling the agent, reset the override values if necessary.
     updateViewMetrics(0, 0, 0, false, false, m_embedderFontScaleFactor, m_embedderTextAutosizingEnabled);
     m_state->setLong(PageAgentState::pageAgentScreenWidthOverride, 0);
     m_state->setLong(PageAgentState::pageAgentScreenHeightOverride, 0);
     m_state->setDouble(PageAgentState::pageAgentDeviceScaleFactorOverride, 0);
     m_state->setBoolean(PageAgentState::pageAgentEmulateViewport, false);
     m_state->setBoolean(PageAgentState::pageAgentFitWindow, false);
@@ skipping 704 matching lines @@
         m_page->settings().setDeviceScaleAdjustment(fontScaleFactor);
     }
 
     // FIXME: allow metrics override, fps counter and continuous painting at the same time: crbug.com/299837.
     m_client->setShowFPSCounter(m_state->getBoolean(PageAgentState::pageAgentShowFPSCounter) && !m_deviceMetricsOverridden);
     m_client->setContinuousPaintingEnabled(m_state->getBoolean(PageAgentState::pageAgentContinuousPaintingEnabled) && !m_deviceMetricsOverridden);
 }
 
 void InspectorPageAgent::updateTouchEventEmulationInPage(bool enabled)
 {
-    m_state->setBoolean(PageAgentState::touchEventEmulationEnabled, enabled);
+    if (!m_touchEmulationEnabled) {
+        m_originalTouchEnabled = RuntimeEnabledFeatures::touchEnabled();
+        m_originalDeviceSupportsMouse = m_page->settings().deviceSupportsMouse();
+        m_originalDeviceSupportsTouch = m_page->settings().deviceSupportsTouch();
+    }
+    RuntimeEnabledFeatures::setTouchEnabled(enabled ? true : m_originalTouchEnabled);
+    m_page->settings().setDeviceSupportsMouse(enabled ? false : m_originalDeviceSupportsMouse);
+    m_page->settings().setDeviceSupportsTouch(enabled ? true : m_originalDeviceSupportsTouch);
+    m_touchEmulationEnabled = enabled;
     m_client->setTouchEventEmulationEnabled(enabled);
+    m_page->mainFrame()->view()->layout();
 }
 
-void InspectorPageAgent::setTouchEmulationEnabled(ErrorString*, bool enabled)
+void InspectorPageAgent::hasTouchInputs(ErrorString*, bool* result)
+{
+    *result = m_touchEmulationEnabled ? m_originalDeviceSupportsTouch : m_page->settings().deviceSupportsTouch();
+}
+
+void InspectorPageAgent::setTouchEmulationEnabled(ErrorString* error, bool enabled)
 {
     if (m_state->getBoolean(PageAgentState::touchEventEmulationEnabled) == enabled)
         return;
+
+    bool hasTouch = false;
+    hasTouchInputs(error, &hasTouch);
+    if (enabled && hasTouch) {
+        if (error)
+            *error = "Device already supports touch input";
+        return;
+    }
+
+    m_state->setBoolean(PageAgentState::touchEventEmulationEnabled, enabled);
     updateTouchEventEmulationInPage(enabled);
 }
 
 void InspectorPageAgent::setEmulatedMedia(ErrorString*, const String& media)
 {
     String currentMedia = m_state->getString(PageAgentState::pageAgentEmulatedMedia);
     if (media == currentMedia)
         return;
 
     m_state->setString(PageAgentState::pageAgentEmulatedMedia, media);
@@ skipping 45 matching lines @@
 }
 
 void InspectorPageAgent::setShowViewportSizeOnResize(ErrorString*, bool show, const bool* showGrid)
 {
     m_state->setBoolean(PageAgentState::showSizeOnResize, show);
     m_state->setBoolean(PageAgentState::showGridOnResize, showGrid && *showGrid);
 }
 
 } // namespace WebCore