Adds DevTools commands for forced viewport override.

third_party/WebKit/Source/web/InspectorEmulationAgent.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/InspectorEmulationAgent.h"
 
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/page/Page.h"
 #include "platform/geometry/DoubleRect.h"
 #include "public/platform/Platform.h"
+#include "public/platform/WebFloatPoint.h"
 #include "public/platform/WebThread.h"
 #include "public/platform/WebViewScheduler.h"
 #include "web/DevToolsEmulator.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/WebViewImpl.h"
 
 namespace blink {
 
 namespace EmulationAgentState {
 static const char scriptExecutionDisabled[] = "scriptExecutionDisabled";
 static const char touchEventEmulationEnabled[] = "touchEventEmulationEnabled";
 static const char emulatedMedia[] = "emulatedMedia";
+static const char forcedViewportEnabled[] = "forcedViewportEnabled";
+static const char forcedViewportX[] = "forcedViewportX";
+static const char forcedViewportY[] = "forcedViewportY";
+static const char forcedViewportScale[] = "forcedViewportScale";
 }
 
 InspectorEmulationAgent* InspectorEmulationAgent::create(WebLocalFrameImpl* webLocalFrameImpl, Client* client)
 {
     return new InspectorEmulationAgent(webLocalFrameImpl, client);
 }
 
 InspectorEmulationAgent::InspectorEmulationAgent(WebLocalFrameImpl* webLocalFrameImpl, Client* client)
     : m_webLocalFrameImpl(webLocalFrameImpl)
     , m_client(client)
@@ skipping 11 matching lines @@
 }
 
 void InspectorEmulationAgent::restore()
 {
     ErrorString error;
     setScriptExecutionDisabled(&error, m_state->booleanProperty(EmulationAgentState::scriptExecutionDisabled, false));
     setTouchEmulationEnabled(&error, m_state->booleanProperty(EmulationAgentState::touchEventEmulationEnabled, false), protocol::Maybe<String>());
     String emulatedMedia;
     m_state->getString(EmulationAgentState::emulatedMedia, &emulatedMedia);
     setEmulatedMedia(&error, emulatedMedia);
+    if (m_state->booleanProperty(EmulationAgentState::forcedViewportEnabled, false)) {
+        forceViewport(&error, m_state->doubleProperty(EmulationAgentState::forcedViewportX, 0), m_state->doubleProperty(EmulationAgentState::forcedViewportY, 0), m_state->doubleProperty(EmulationAgentState::forcedViewportScale, 1));
+    }
 }
 
 void InspectorEmulationAgent::disable(ErrorString*)
 {
     ErrorString error;
     setScriptExecutionDisabled(&error, false);
     setTouchEmulationEnabled(&error, false, protocol::Maybe<String>());
     setEmulatedMedia(&error, String());
+    resetViewport(&error);
+}
+
+void InspectorEmulationAgent::forceViewport(ErrorString* error, double x, double y, double scale)
+{
+    if (x < 0 || y < 0) {
+        *error = "Coordinates must be non-negative";
+        return;
+    }
+
+    if (scale <= 0) {
+        *error = "Scale must be positive";
+        return;
+    }
+
+    m_state->setBoolean(EmulationAgentState::forcedViewportEnabled, true);
+    m_state->setDouble(EmulationAgentState::forcedViewportX, x);
+    m_state->setDouble(EmulationAgentState::forcedViewportY, y);
+    m_state->setDouble(EmulationAgentState::forcedViewportScale, scale);
+
+    WebFloatPoint position(x, y);

[dgozman, 2016/09/17 01:22:28]

nit: can inline below as WebFloatPoint(x, y)

[Eric Seckler, 2016/09/22 12:43:00]

Done.

+    webViewImpl()->devToolsEmulator()->forceViewport(position, scale);
+}
+
+void InspectorEmulationAgent::resetViewport(ErrorString*)
+{
+    m_state->setBoolean(EmulationAgentState::forcedViewportEnabled, false);
+    webViewImpl()->devToolsEmulator()->resetViewport();
 }
 
 void InspectorEmulationAgent::resetPageScaleFactor(ErrorString*)
 {
     webViewImpl()->resetScaleStateImmediately();
 }
 
 void InspectorEmulationAgent::setPageScaleFactor(ErrorString*, double pageScaleFactor)
 {
     webViewImpl()->setPageScaleFactor(static_cast<float>(pageScaleFactor));
@@ skipping 46 matching lines @@
     frontend()->virtualTimeBudgetExpired();
 }
 
 DEFINE_TRACE(InspectorEmulationAgent)
 {
     visitor->trace(m_webLocalFrameImpl);
     InspectorBaseAgent::trace(visitor);
 }
 
 } // namespace blink