// Copyright (c) 2011 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 "chrome/test/render_view_test.h"

#include "chrome/browser/extensions/extension_function_dispatcher.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/print_messages.h"
#include "chrome/common/render_messages.h"
#include "chrome/renderer/autofill/password_autofill_manager.h"
#include "chrome/renderer/extensions/event_bindings.h"
#include "chrome/renderer/extensions/extension_dispatcher.h"
#include "chrome/renderer/extensions/extension_process_bindings.h"
#include "chrome/renderer/extensions/js_only_v8_extensions.h"
#include "chrome/renderer/extensions/renderer_extension_bindings.h"
#include "chrome/renderer/mock_render_process.h"
#include "content/common/dom_storage_common.h"
#include "content/common/native_web_keyboard_event.h"
#include "content/common/renderer_preferences.h"
#include "content/common/view_messages.h"
#include "content/renderer/renderer_main_platform_delegate.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebKit.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebScriptController.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebScriptSource.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebURLRequest.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#include "webkit/glue/webkit_glue.h"

#if defined(OS_LINUX)
#include "ui/base/gtk/event_synthesis_gtk.h"
#endif

using WebKit::WebFrame;
using WebKit::WebInputEvent;
using WebKit::WebMouseEvent;
using WebKit::WebScriptController;
using WebKit::WebScriptSource;
using WebKit::WebString;
using WebKit::WebURLRequest;
using autofill::AutofillAgent;
using autofill::PasswordAutofillManager;

namespace {
const int32 kRouteId = 5;
const int32 kOpenerId = 7;
}  // namespace

RenderViewTest::RenderViewTest() : extension_dispatcher_(NULL) {
}

RenderViewTest::~RenderViewTest() {
}

void RenderViewTest::ProcessPendingMessages() {
  msg_loop_.PostTask(FROM_HERE, new MessageLoop::QuitTask());
  msg_loop_.Run();
}

WebFrame* RenderViewTest::GetMainFrame() {
  return view_->webview()->mainFrame();
}

void RenderViewTest::ExecuteJavaScript(const char* js) {
  GetMainFrame()->executeScript(WebScriptSource(WebString::fromUTF8(js)));
}

bool RenderViewTest::ExecuteJavaScriptAndReturnIntValue(
    const string16& script,
    int* int_result) {
  v8::Handle<v8::Value> result =
      GetMainFrame()->executeScriptAndReturnValue(WebScriptSource(script));
  if (result.IsEmpty() || !result->IsInt32())
    return false;

  if (int_result)
    *int_result = result->Int32Value();

  return true;
}

void RenderViewTest::LoadHTML(const char* html) {
  std::string url_str = "data:text/html;charset=utf-8,";
  url_str.append(html);
  GURL url(url_str);

  GetMainFrame()->loadRequest(WebURLRequest(url));

  // The load actually happens asynchronously, so we pump messages to process
  // the pending continuation.
  ProcessPendingMessages();
}

void RenderViewTest::SetUp() {
  content::GetContentClient()->set_renderer(&chrome_content_renderer_client_);
  extension_dispatcher_ = new ExtensionDispatcher();
  chrome_content_renderer_client_.SetExtensionDispatcher(extension_dispatcher_);
  sandbox_init_wrapper_.reset(new SandboxInitWrapper());
  command_line_.reset(new CommandLine(CommandLine::NO_PROGRAM));
  params_.reset(new MainFunctionParams(*command_line_, *sandbox_init_wrapper_,
                                       NULL));
  platform_.reset(new RendererMainPlatformDelegate(*params_));
  platform_->PlatformInitialize();

  // Setting flags and really doing anything with WebKit is fairly fragile and
  // hacky, but this is the world we live in...
  webkit_glue::SetJavaScriptFlags(" --expose-gc");
  WebKit::initialize(&webkitclient_);
  WebScriptController::registerExtension(JsonSchemaJsV8Extension::Get());
  WebScriptController::registerExtension(EventBindings::Get(
      extension_dispatcher_));
  WebScriptController::registerExtension(ExtensionApiTestV8Extension::Get());
  WebScriptController::registerExtension(ExtensionProcessBindings::Get(
      extension_dispatcher_));
  WebScriptController::registerExtension(RendererExtensionBindings::Get(
      extension_dispatcher_));
  EventBindings::SetRenderThread(&render_thread_);

  mock_process_.reset(new MockRenderProcess);

  render_thread_.set_routing_id(kRouteId);

  // This needs to pass the mock render thread to the view.
  view_ = RenderView::Create(&render_thread_,
                             0,
                             kOpenerId,
                             RendererPreferences(),
                             WebPreferences(),
                             new SharedRenderViewCounter(0),
                             kRouteId,
                             kInvalidSessionStorageNamespaceId,
                             string16());

  // Attach a pseudo keyboard device to this object.
  mock_keyboard_.reset(new MockKeyboard());

  // RenderView doesn't expose it's PasswordAutofillManager or
  // AutofillAgent objects, because it has no need to store them directly
  // (they're stored as RenderViewObserver*).  So just create another set.
  password_autofill_ = new PasswordAutofillManager(view_);
  autofill_agent_ = new AutofillAgent(view_, password_autofill_);
}

void RenderViewTest::TearDown() {
  // Try very hard to collect garbage before shutting down.
  GetMainFrame()->collectGarbage();
  GetMainFrame()->collectGarbage();

  render_thread_.SendCloseMessage();

  // Run the loop so the release task from the renderwidget executes.
  ProcessPendingMessages();

  EventBindings::SetRenderThread(NULL);

  view_ = NULL;

  mock_process_.reset();

  // After resetting the view_ and mock_process_ we may get some new tasks
  // which need to be processed before shutting down WebKit
  // (http://crbug.com/21508).
  msg_loop_.RunAllPending();

  WebKit::shutdown();

  mock_keyboard_.reset();

  platform_->PlatformUninitialize();
  platform_.reset();
  params_.reset();
  command_line_.reset();
  sandbox_init_wrapper_.reset();

  extension_dispatcher_->OnRenderProcessShutdown();
  extension_dispatcher_ = NULL;
}

int RenderViewTest::SendKeyEvent(MockKeyboard::Layout layout,
                                 int key_code,
                                 MockKeyboard::Modifiers modifiers,
                                 std::wstring* output) {
#if defined(OS_WIN)
  // Retrieve the Unicode character for the given tuple (keyboard-layout,
  // key-code, and modifiers).
  // Exit when a keyboard-layout driver cannot assign a Unicode character to
  // the tuple to prevent sending an invalid key code to the RenderView object.
  CHECK(mock_keyboard_.get());
  CHECK(output);
  int length = mock_keyboard_->GetCharacters(layout, key_code, modifiers,
                                             output);
  if (length != 1)
    return -1;

  // Create IPC messages from Windows messages and send them to our
  // back-end.
  // A keyboard event of Windows consists of three Windows messages:
  // WM_KEYDOWN, WM_CHAR, and WM_KEYUP.
  // WM_KEYDOWN and WM_KEYUP sends virtual-key codes. On the other hand,
  // WM_CHAR sends a composed Unicode character.
  NativeWebKeyboardEvent keydown_event(NULL, WM_KEYDOWN, key_code, 0);
  SendNativeKeyEvent(keydown_event);

  NativeWebKeyboardEvent char_event(NULL, WM_CHAR, (*output)[0], 0);
  SendNativeKeyEvent(char_event);

  NativeWebKeyboardEvent keyup_event(NULL, WM_KEYUP, key_code, 0);
  SendNativeKeyEvent(keyup_event);

  return length;
#elif defined(OS_LINUX)
  // We ignore |layout|, which means we are only testing the layout of the
  // current locale. TODO(estade): fix this to respect |layout|.
  std::vector<GdkEvent*> events;
  ui::SynthesizeKeyPressEvents(
      NULL, static_cast<ui::KeyboardCode>(key_code),
      modifiers & (MockKeyboard::LEFT_CONTROL | MockKeyboard::RIGHT_CONTROL),
      modifiers & (MockKeyboard::LEFT_SHIFT | MockKeyboard::RIGHT_SHIFT),
      modifiers & (MockKeyboard::LEFT_ALT | MockKeyboard::RIGHT_ALT),
      &events);

  guint32 unicode_key = 0;
  for (size_t i = 0; i < events.size(); ++i) {
    // Only send the up/down events for key press itself (skip the up/down
    // events for the modifier keys).
    if ((i + 1) == (events.size() / 2) || i == (events.size() / 2)) {
      unicode_key = gdk_keyval_to_unicode(events[i]->key.keyval);
      NativeWebKeyboardEvent webkit_event(&events[i]->key);
      SendNativeKeyEvent(webkit_event);

      // Need to add a char event after the key down.
      if (webkit_event.type == WebKit::WebInputEvent::RawKeyDown) {
        NativeWebKeyboardEvent char_event = webkit_event;
        char_event.type = WebKit::WebInputEvent::Char;
        char_event.skip_in_browser = true;
        SendNativeKeyEvent(char_event);
      }
    }
    gdk_event_free(events[i]);
  }

  *output = std::wstring(1, unicode_key);
  return 1;
#else
  NOTIMPLEMENTED();
  return L'\0';
#endif
}

void RenderViewTest::SendNativeKeyEvent(
    const NativeWebKeyboardEvent& key_event) {
  scoped_ptr<IPC::Message> input_message(new ViewMsg_HandleInputEvent(0));
  input_message->WriteData(reinterpret_cast<const char*>(&key_event),
                           sizeof(WebKit::WebKeyboardEvent));
  view_->OnMessageReceived(*input_message);
}

const char* const kGetCoordinatesScript =
    "(function() {"
    "  function GetCoordinates(elem) {"
    "    if (!elem)"
    "      return [ 0, 0];"
    "    var coordinates = [ elem.offsetLeft, elem.offsetTop];"
    "    var parent_coordinates = GetCoordinates(elem.offsetParent);"
    "    coordinates[0] += parent_coordinates[0];"
    "    coordinates[1] += parent_coordinates[1];"
    "    return coordinates;"
    "  };"
    "  var elem = document.getElementById('$1');"
    "  if (!elem)"
    "    return null;"
    "  var bounds = GetCoordinates(elem);"
    "  bounds[2] = elem.offsetWidth;"
    "  bounds[3] = elem.offsetHeight;"
    "  return bounds;"
    "})();";
gfx::Rect RenderViewTest::GetElementBounds(const std::string& element_id) {
  std::vector<std::string> params;
  params.push_back(element_id);
  std::string script =
      ReplaceStringPlaceholders(kGetCoordinatesScript, params, NULL);

  v8::HandleScope handle_scope;
  v8::Handle<v8::Value>  value = GetMainFrame()->executeScriptAndReturnValue(
      WebScriptSource(WebString::fromUTF8(script)));
  if (value.IsEmpty() || !value->IsArray())
    return gfx::Rect();

  v8::Handle<v8::Array> array = value.As<v8::Array>();
  if (array->Length() != 4)
    return gfx::Rect();
  std::vector<int> coords;
  for (int i = 0; i < 4; ++i) {
    v8::Handle<v8::Number> index = v8::Number::New(i);
    v8::Local<v8::Value> value = array->Get(index);
    if (value.IsEmpty() || !value->IsInt32())
      return gfx::Rect();
    coords.push_back(value->Int32Value());
  }
  return gfx::Rect(coords[0], coords[1], coords[2], coords[3]);
}

bool RenderViewTest::SimulateElementClick(const std::string& element_id) {
  gfx::Rect bounds = GetElementBounds(element_id);
  if (bounds.IsEmpty())
    return false;
  WebMouseEvent mouse_event;
  mouse_event.type = WebInputEvent::MouseDown;
  mouse_event.button = WebMouseEvent::ButtonLeft;
  mouse_event.x = bounds.CenterPoint().x();
  mouse_event.y = bounds.CenterPoint().y();
  mouse_event.clickCount = 1;
  ViewMsg_HandleInputEvent input_event(0);
  scoped_ptr<IPC::Message> input_message(new ViewMsg_HandleInputEvent(0));
  input_message->WriteData(reinterpret_cast<const char*>(&mouse_event),
                           sizeof(WebMouseEvent));
  view_->OnMessageReceived(*input_message);
  return true;
}