/*
 * Copyright (C) 2012 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:
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

#include "web/LinkHighlightImpl.h"

#include "bindings/core/v8/ExceptionStatePlaceholder.h"
#include "core/dom/Node.h"
#include "core/frame/FrameView.h"
#include "core/input/EventHandler.h"
#include "core/page/Page.h"
#include "core/page/TouchDisambiguation.h"
#include "platform/geometry/IntRect.h"
#include "platform/testing/URLTestHelpers.h"
#include "public/platform/Platform.h"
#include "public/platform/WebContentLayer.h"
#include "public/platform/WebFloatPoint.h"
#include "public/platform/WebInputEvent.h"
#include "public/platform/WebSize.h"
#include "public/platform/WebURLLoaderMockFactory.h"
#include "public/web/WebCache.h"
#include "public/web/WebFrame.h"
#include "public/web/WebFrameClient.h"
#include "public/web/WebViewClient.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "web/WebInputEventConversion.h"
#include "web/WebLocalFrameImpl.h"
#include "web/WebViewImpl.h"
#include "web/tests/FrameTestHelpers.h"
#include "wtf/PtrUtil.h"
#include <memory>

namespace blink {

GestureEventWithHitTestResults getTargetedEvent(WebViewImpl* webViewImpl,
                                                WebGestureEvent& touchEvent) {
  PlatformGestureEventBuilder platformEvent(
      webViewImpl->mainFrameImpl()->frameView(), touchEvent);
  return webViewImpl->page()
      ->deprecatedLocalMainFrame()
      ->eventHandler()
      .targetGestureEvent(platformEvent, true);
}

TEST(LinkHighlightImplTest, verifyWebViewImplIntegration) {
  const std::string baseURL("http://www.test.com/");
  const std::string fileName("test_touch_link_highlight.html");

  URLTestHelpers::registerMockedURLFromBaseURL(
      WebString::fromUTF8(baseURL.c_str()),
      WebString::fromUTF8("test_touch_link_highlight.html"));
  FrameTestHelpers::WebViewHelper webViewHelper;
  WebViewImpl* webViewImpl =
      webViewHelper.initializeAndLoad(baseURL + fileName, true);
  int pageWidth = 640;
  int pageHeight = 480;
  webViewImpl->resize(WebSize(pageWidth, pageHeight));
  webViewImpl->updateAllLifecyclePhases();

  WebGestureEvent touchEvent;
  touchEvent.type = WebInputEvent::GestureShowPress;
  touchEvent.sourceDevice = WebGestureDeviceTouchscreen;

  // The coordinates below are linked to absolute positions in the referenced
  // .html file.
  touchEvent.x = 20;
  touchEvent.y = 20;

  ASSERT_TRUE(
      webViewImpl->bestTapNode(getTargetedEvent(webViewImpl, touchEvent)));

  touchEvent.y = 40;
  EXPECT_FALSE(
      webViewImpl->bestTapNode(getTargetedEvent(webViewImpl, touchEvent)));

  touchEvent.y = 20;
  // Shouldn't crash.
  webViewImpl->enableTapHighlightAtPoint(
      getTargetedEvent(webViewImpl, touchEvent));

  EXPECT_TRUE(webViewImpl->getLinkHighlight(0));
  EXPECT_TRUE(webViewImpl->getLinkHighlight(0)->contentLayer());
  EXPECT_TRUE(webViewImpl->getLinkHighlight(0)->clipLayer());

  // Find a target inside a scrollable div
  touchEvent.y = 100;
  webViewImpl->enableTapHighlightAtPoint(
      getTargetedEvent(webViewImpl, touchEvent));
  ASSERT_TRUE(webViewImpl->getLinkHighlight(0));

  // Don't highlight if no "hand cursor"
  touchEvent.y = 220;  // An A-link with cross-hair cursor.
  webViewImpl->enableTapHighlightAtPoint(
      getTargetedEvent(webViewImpl, touchEvent));
  ASSERT_EQ(0U, webViewImpl->numLinkHighlights());

  touchEvent.y = 260;  // A text input box.
  webViewImpl->enableTapHighlightAtPoint(
      getTargetedEvent(webViewImpl, touchEvent));
  ASSERT_EQ(0U, webViewImpl->numLinkHighlights());

  Platform::current()->getURLLoaderMockFactory()->unregisterAllURLs();
  WebCache::clear();
}

namespace {

class FakeCompositingWebViewClient
    : public FrameTestHelpers::TestWebViewClient {
 public:
  FrameTestHelpers::TestWebFrameClient m_fakeWebFrameClient;
};

FakeCompositingWebViewClient* compositingWebViewClient() {
  DEFINE_STATIC_LOCAL(FakeCompositingWebViewClient, client, ());
  return &client;
}

}  // anonymous namespace

TEST(LinkHighlightImplTest, resetDuringNodeRemoval) {
  const std::string baseURL("http://www.test.com/");
  const std::string fileName("test_touch_link_highlight.html");

  URLTestHelpers::registerMockedURLFromBaseURL(
      WebString::fromUTF8(baseURL.c_str()),
      WebString::fromUTF8("test_touch_link_highlight.html"));
  FrameTestHelpers::WebViewHelper webViewHelper;
  WebViewImpl* webViewImpl = webViewHelper.initializeAndLoad(
      baseURL + fileName, true, 0, compositingWebViewClient());

  int pageWidth = 640;
  int pageHeight = 480;
  webViewImpl->resize(WebSize(pageWidth, pageHeight));
  webViewImpl->updateAllLifecyclePhases();

  WebGestureEvent touchEvent;
  touchEvent.type = WebInputEvent::GestureShowPress;
  touchEvent.sourceDevice = WebGestureDeviceTouchscreen;
  touchEvent.x = 20;
  touchEvent.y = 20;

  GestureEventWithHitTestResults targetedEvent =
      getTargetedEvent(webViewImpl, touchEvent);
  Node* touchNode = webViewImpl->bestTapNode(targetedEvent);
  ASSERT_TRUE(touchNode);

  webViewImpl->enableTapHighlightAtPoint(targetedEvent);
  ASSERT_TRUE(webViewImpl->getLinkHighlight(0));

  GraphicsLayer* highlightLayer =
      webViewImpl->getLinkHighlight(0)->currentGraphicsLayerForTesting();
  ASSERT_TRUE(highlightLayer);
  EXPECT_TRUE(highlightLayer->getLinkHighlight(0));

  touchNode->remove(IGNORE_EXCEPTION);
  webViewImpl->updateAllLifecyclePhases();
  ASSERT_EQ(0U, highlightLayer->numLinkHighlights());

  Platform::current()->getURLLoaderMockFactory()->unregisterAllURLs();
  WebCache::clear();
}

// A lifetime test: delete LayerTreeView while running LinkHighlights.
TEST(LinkHighlightImplTest, resetLayerTreeView) {
  std::unique_ptr<FakeCompositingWebViewClient> webViewClient =
      makeUnique<FakeCompositingWebViewClient>();

  const std::string baseURL("http://www.test.com/");
  const std::string fileName("test_touch_link_highlight.html");

  URLTestHelpers::registerMockedURLFromBaseURL(
      WebString::fromUTF8(baseURL.c_str()),
      WebString::fromUTF8("test_touch_link_highlight.html"));
  FrameTestHelpers::WebViewHelper webViewHelper;
  WebViewImpl* webViewImpl = webViewHelper.initializeAndLoad(
      baseURL + fileName, true, 0, webViewClient.get());

  int pageWidth = 640;
  int pageHeight = 480;
  webViewImpl->resize(WebSize(pageWidth, pageHeight));
  webViewImpl->updateAllLifecyclePhases();

  WebGestureEvent touchEvent;
  touchEvent.type = WebInputEvent::GestureShowPress;
  touchEvent.sourceDevice = WebGestureDeviceTouchscreen;
  touchEvent.x = 20;
  touchEvent.y = 20;

  GestureEventWithHitTestResults targetedEvent =
      getTargetedEvent(webViewImpl, touchEvent);
  Node* touchNode = webViewImpl->bestTapNode(targetedEvent);
  ASSERT_TRUE(touchNode);

  webViewImpl->enableTapHighlightAtPoint(targetedEvent);
  ASSERT_TRUE(webViewImpl->getLinkHighlight(0));

  GraphicsLayer* highlightLayer =
      webViewImpl->getLinkHighlight(0)->currentGraphicsLayerForTesting();
  ASSERT_TRUE(highlightLayer);
  EXPECT_TRUE(highlightLayer->getLinkHighlight(0));

  // Mimic the logic from RenderWidget::Close:
  webViewImpl->willCloseLayerTreeView();
  webViewHelper.reset();

  Platform::current()->getURLLoaderMockFactory()->unregisterAllURLs();
  WebCache::clear();
}

TEST(LinkHighlightImplTest, multipleHighlights) {
  const std::string baseURL("http://www.test.com/");
  const std::string fileName("test_touch_link_highlight.html");

  URLTestHelpers::registerMockedURLFromBaseURL(
      WebString::fromUTF8(baseURL.c_str()),
      WebString::fromUTF8("test_touch_link_highlight.html"));
  FrameTestHelpers::WebViewHelper webViewHelper;
  WebViewImpl* webViewImpl = webViewHelper.initializeAndLoad(
      baseURL + fileName, true, 0, compositingWebViewClient());

  int pageWidth = 640;
  int pageHeight = 480;
  webViewImpl->resize(WebSize(pageWidth, pageHeight));
  webViewImpl->updateAllLifecyclePhases();

  WebGestureEvent touchEvent;
  touchEvent.x = 50;
  touchEvent.y = 310;
  touchEvent.data.tap.width = 30;
  touchEvent.data.tap.height = 30;

  Vector<IntRect> goodTargets;
  HeapVector<Member<Node>> highlightNodes;
  IntRect boundingBox(touchEvent.x - touchEvent.data.tap.width / 2,
                      touchEvent.y - touchEvent.data.tap.height / 2,
                      touchEvent.data.tap.width, touchEvent.data.tap.height);
  findGoodTouchTargets(boundingBox, webViewImpl->mainFrameImpl()->frame(),
                       goodTargets, highlightNodes);

  webViewImpl->enableTapHighlights(highlightNodes);
  EXPECT_EQ(2U, webViewImpl->numLinkHighlights());

  Platform::current()->getURLLoaderMockFactory()->unregisterAllURLs();
  WebCache::clear();
}

}  // namespace blink