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// Copyright (c) 2008 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 "base/scoped_ptr.h"
#include "chrome/common/render_messages.h"
#include "chrome/renderer/extensions/renderer_extension_bindings.h"
#include "chrome/renderer/mock_render_process.h"
#include "chrome/renderer/mock_render_thread.h"
#include "chrome/renderer/render_view.h"
#include "chrome/renderer/renderer_webkitclient_impl.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/WebKit/WebKit/chromium/public/WebKit.h"
#include "third_party/WebKit/WebKit/chromium/public/WebScriptSource.h"
#include "webkit/glue/webframe.h"
#include "webkit/glue/weburlrequest.h"
#include "webkit/glue/webview.h"

using WebKit::WebScriptSource;
using WebKit::WebString;

namespace {

const int32 kRouteId = 5;
const int32 kOpenerId = 7;

};

class RenderViewTest : public testing::Test {
 public:
  RenderViewTest() {}
  ~RenderViewTest() {}

 protected:
  // Spins the message loop to process all messages that are currently pending.
  void ProcessPendingMessages() {
    msg_loop_.PostTask(FROM_HERE, new MessageLoop::QuitTask());
    msg_loop_.Run();
  }

  // Returns a pointer to the main frame.
  WebFrame* GetMainFrame() {
    return view_->webview()->GetMainFrame();
  }

  // Executes the given JavaScript in the context of the main frame. The input
  // is a NULL-terminated UTF-8 string.
  void ExecuteJavaScript(const char* js) {
    GetMainFrame()->ExecuteScript(WebScriptSource(WebString::fromUTF8(js)));
  }

  // Loads the given HTML into the main frame as a data: URL.
  void LoadHTML(const char* html) {
    std::string url_str = "data:text/html;charset=utf-8,";
    url_str.append(html);
    GURL url(url_str);

    scoped_ptr<WebRequest> request(WebRequest::Create(url));
    GetMainFrame()->LoadRequest(request.get());

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

  // testing::Test
  virtual void SetUp() {
    WebKit::initialize(&webkitclient_);
    WebKit::registerExtension(
        extensions_v8::RendererExtensionBindings::Get(&render_thread_));

    mock_process_.reset(new MockProcess());

    render_thread_.set_routing_id(kRouteId);

    // This needs to pass the mock render thread to the view.
    view_ = RenderView::Create(&render_thread_, NULL, NULL, kOpenerId,
                               WebPreferences(),
                               new SharedRenderViewCounter(0), kRouteId);
  }
  virtual void TearDown() {
    render_thread_.SendCloseMessage();

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

    view_ = NULL;

    mock_process_.reset();
    WebKit::shutdown();

    msg_loop_.RunAllPending();
  }

  MessageLoop msg_loop_;
  MockRenderThread render_thread_;
  scoped_ptr<MockProcess> mock_process_;
  scoped_refptr<RenderView> view_;
  RendererWebKitClientImpl webkitclient_;
};


TEST_F(RenderViewTest, OnLoadAlternateHTMLText) {
  // Test a new navigation.
  GURL test_url("http://www.google.com/some_test_url");
  view_->OnLoadAlternateHTMLText("<html></html>", true, test_url,
                                 std::string());

  // We should have gotten two different types of start messages in the
  // following order.
  ASSERT_EQ((size_t)2, render_thread_.sink().message_count());
  const IPC::Message* msg = render_thread_.sink().GetMessageAt(0);
  EXPECT_EQ(ViewHostMsg_DidStartLoading::ID, msg->type());

  msg = render_thread_.sink().GetMessageAt(1);
  EXPECT_EQ(ViewHostMsg_DidStartProvisionalLoadForFrame::ID, msg->type());
  ViewHostMsg_DidStartProvisionalLoadForFrame::Param start_params;
  ViewHostMsg_DidStartProvisionalLoadForFrame::Read(msg, &start_params);
  EXPECT_EQ(GURL("chrome-ui://chromewebdata/"), start_params.b);
}

// Test that we get form state change notifications when input fields change.
TEST_F(RenderViewTest, OnNavStateChanged) {
  // Don't want any delay for form state sync changes. This will still post a
  // message so updates will get coalesced, but as soon as we spin the message
  // loop, it will generate an update.
  view_->set_delay_seconds_for_form_state_sync(0);

  LoadHTML("<input type=\"text\" id=\"elt_text\"></input>");

  // We should NOT have gotten a form state change notification yet.
  EXPECT_FALSE(render_thread_.sink().GetFirstMessageMatching(
      ViewHostMsg_UpdateState::ID));
  render_thread_.sink().ClearMessages();

  // Change the value of the input. We should have gotten an update state
  // notification. We need to spin the message loop to catch this update.
  ExecuteJavaScript("document.getElementById('elt_text').value = 'foo';");
  ProcessPendingMessages();
  EXPECT_TRUE(render_thread_.sink().GetUniqueMessageMatching(
      ViewHostMsg_UpdateState::ID));
}

// Test that our IME backend sends a notification message when the input focus
// changes.
TEST_F(RenderViewTest, OnImeStateChanged) {
  // Enable our IME backend code.
  view_->OnImeSetInputMode(true);

  // Load an HTML page consisting of two input fields.
  view_->set_delay_seconds_for_form_state_sync(0);
  LoadHTML("<html>"
           "<head>"
           "</head>"
           "<body>"
           "<input id=\"test1\" type=\"text\"></input>"
           "<input id=\"test2\" type=\"password\"></input>"
           "</body>"
           "</html>");
  render_thread_.sink().ClearMessages();

  const int kRepeatCount = 10;
  for (int i = 0; i < kRepeatCount; i++) {
    // Move the input focus to the first <input> element, where we should
    // activate IMEs.
    ExecuteJavaScript("document.getElementById('test1').focus();");
    ProcessPendingMessages();
    render_thread_.sink().ClearMessages();

    // Update the IME status and verify if our IME backend sends an IPC message
    // to activate IMEs.
    view_->UpdateIME();
    const IPC::Message* msg = render_thread_.sink().GetMessageAt(0);
    EXPECT_TRUE(msg != NULL);
    EXPECT_EQ(ViewHostMsg_ImeUpdateStatus::ID, msg->type());
    ViewHostMsg_ImeUpdateStatus::Param params;
    ViewHostMsg_ImeUpdateStatus::Read(msg, &params);
    EXPECT_EQ(params.a, IME_COMPLETE_COMPOSITION);
    EXPECT_TRUE(params.b.x() > 0 && params.b.y() > 0);

    // Move the input focus to the second <input> element, where we should
    // de-activate IMEs.
    ExecuteJavaScript("document.getElementById('test2').focus();");
    ProcessPendingMessages();
    render_thread_.sink().ClearMessages();

    // Update the IME status and verify if our IME backend sends an IPC message
    // to de-activate IMEs.
    view_->UpdateIME();
    msg = render_thread_.sink().GetMessageAt(0);
    EXPECT_TRUE(msg != NULL);
    EXPECT_EQ(ViewHostMsg_ImeUpdateStatus::ID, msg->type());
    ViewHostMsg_ImeUpdateStatus::Read(msg, &params);
    EXPECT_EQ(params.a, IME_DISABLE);
  }
}

// Test that our IME backend can compose CJK words.
// Our IME front-end sends many platform-independent messages to the IME backend
// while it composes CJK words. This test sends the minimal messages captured
// on my local environment directly to the IME backend to verify if the backend
// can compose CJK words without any problems.
// This test uses an array of command sets because an IME composotion does not
// only depends on IME events, but also depends on window events, e.g. moving
// the window focus while composing a CJK text. To handle such complicated
// cases, this test should not only call IME-related functions in the
// RenderWidget class, but also call some RenderWidget members, e.g.
// ExecuteJavaScript(), RenderWidget::OnSetFocus(), etc.
TEST_F(RenderViewTest, ImeComposition) {
  enum ImeCommand {
    IME_INITIALIZE,
    IME_SETINPUTMODE,
    IME_SETFOCUS,
    IME_SETCOMPOSITION,
  };
  struct ImeMessage {
    ImeCommand command;
    bool enable;
    int string_type;
    int cursor_position;
    int target_start;
    int target_end;
    const wchar_t* ime_string;
    const wchar_t* result;
  };
  static const ImeMessage kImeMessages[] = {
    // Scenario 1: input a Chinese word with Microsoft IME (on Vista).
    {IME_INITIALIZE, true, 0, 0, 0, 0, NULL, NULL},
    {IME_SETINPUTMODE, true, 0, 0, 0, 0, NULL, NULL},
    {IME_SETFOCUS, true, 0, 0, 0, 0, NULL, NULL},
    {IME_SETCOMPOSITION, false, 0, 1, -1, -1, L"n", L"n"},
    {IME_SETCOMPOSITION, false, 0, 2, -1, -1, L"ni", L"ni"},
    {IME_SETCOMPOSITION, false, 0, 3, -1, -1, L"nih", L"nih"},
    {IME_SETCOMPOSITION, false, 0, 4, -1, -1, L"niha", L"niha"},
    {IME_SETCOMPOSITION, false, 0, 5, -1, -1, L"nihao", L"nihao"},
    {IME_SETCOMPOSITION, false, 0, 2, -1, -1, L"\x4F60\x597D", L"\x4F60\x597D"},
    {IME_SETCOMPOSITION, false, 1, -1, -1, -1, L"\x4F60\x597D",
     L"\x4F60\x597D"},
    {IME_SETCOMPOSITION, false, -1, -1, -1, -1, L"", L"\x4F60\x597D"},
    // Scenario 2: input a Japanese word with Microsoft IME (on Vista).
    {IME_INITIALIZE, true, 0, 0, 0, 0, NULL, NULL},
    {IME_SETINPUTMODE, true, 0, 0, 0, 0, NULL, NULL},
    {IME_SETFOCUS, true, 0, 0, 0, 0, NULL, NULL},
    {IME_SETCOMPOSITION, false, 0, 1, 0, 1, L"\xFF4B", L"\xFF4B"},
    {IME_SETCOMPOSITION, false, 0, 1, 0, 1, L"\x304B", L"\x304B"},
    {IME_SETCOMPOSITION, false, 0, 2, 0, 2, L"\x304B\xFF4E", L"\x304B\xFF4E"},
    {IME_SETCOMPOSITION, false, 0, 3, 0, 3, L"\x304B\x3093\xFF4A",
     L"\x304B\x3093\xFF4A"},
    {IME_SETCOMPOSITION, false, 0, 3, 0, 3, L"\x304B\x3093\x3058",
     L"\x304B\x3093\x3058"},
    {IME_SETCOMPOSITION, false, 0, 0, 0, 2, L"\x611F\x3058", L"\x611F\x3058"},
    {IME_SETCOMPOSITION, false, 0, 0, 0, 2, L"\x6F22\x5B57", L"\x6F22\x5B57"},
    {IME_SETCOMPOSITION, false, 1, -1, -1, -1, L"\x6F22\x5B57",
     L"\x6F22\x5B57"},
    {IME_SETCOMPOSITION, false, -1, -1, -1, -1, L"", L"\x6F22\x5B57"},
    // Scenario 3: input a Korean word with Microsot IME (on Vista).
    {IME_INITIALIZE, true, 0, 0, 0, 0, NULL, NULL},
    {IME_SETINPUTMODE, true, 0, 0, 0, 0, NULL, NULL},
    {IME_SETFOCUS, true, 0, 0, 0, 0, NULL, NULL},
    {IME_SETCOMPOSITION, false, 0, 0, 0, 1, L"\x3147", L"\x3147"},
    {IME_SETCOMPOSITION, false, 0, 0, 0, 1, L"\xC544", L"\xC544"},
    {IME_SETCOMPOSITION, false, 0, 0, 0, 1, L"\xC548", L"\xC548"},
    {IME_SETCOMPOSITION, false, 1, -1, -1, -1, L"\xC548", L"\xC548"},
    {IME_SETCOMPOSITION, false, 0, 0, 0, 1, L"\x3134", L"\xC548\x3134"},
    {IME_SETCOMPOSITION, false, 0, 0, 0, 1, L"\xB140", L"\xC548\xB140"},
    {IME_SETCOMPOSITION, false, 0, 0, 0, 1, L"\xB155", L"\xC548\xB155"},
    {IME_SETCOMPOSITION, false, -1, -1, -1, -1, L"", L"\xC548"},
    {IME_SETCOMPOSITION, false, 1, -1, -1, -1, L"\xB155", L"\xC548\xB155"},
  };

  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kImeMessages); i++) {
    const ImeMessage* ime_message = &kImeMessages[i];
    switch (ime_message->command) {
      case IME_INITIALIZE:
        // Load an HTML page consisting of a content-editable <div> element,
        // and move the input focus to the <div> element, where we can use
        // IMEs.
        view_->OnImeSetInputMode(ime_message->enable);
        view_->set_delay_seconds_for_form_state_sync(0);
        LoadHTML("<html>"
                "<head>"
                "</head>"
                "<body>"
                "<div id=\"test1\" contenteditable=\"true\"></div>"
                "</body>"
                "</html>");
        ExecuteJavaScript("document.getElementById('test1').focus();");
        break;

      case IME_SETINPUTMODE:
        // Activate (or deactivate) our IME back-end.
        view_->OnImeSetInputMode(ime_message->enable);
        break;

      case IME_SETFOCUS:
        // Update the window focus.
        view_->OnSetFocus(ime_message->enable);
        break;

      case IME_SETCOMPOSITION:
        view_->OnImeSetComposition(ime_message->string_type,
                                   ime_message->cursor_position,
                                   ime_message->target_start,
                                   ime_message->target_end,
                                   ime_message->ime_string);
        break;
    }

    // Update the status of our IME back-end.
    // TODO(hbono): we should verify messages to be sent from the back-end.
    view_->UpdateIME();
    ProcessPendingMessages();
    render_thread_.sink().ClearMessages();

    if (ime_message->result) {
      // Retrieve the content of this page and compare it with the expected
      // result.
      const int kMaxOutputCharacters = 128;
      std::wstring output;
      GetMainFrame()->GetContentAsPlainText(kMaxOutputCharacters, &output);
      EXPECT_EQ(output, ime_message->result);
    }
  }
}

// Test that the RenderView::OnSetTextDirection() function can change the text
// direction of the selected input element.
TEST_F(RenderViewTest, OnSetTextDirection) {
  // Load an HTML page consisting of a <textarea> element and a <div> element.
  // This test changes the text direction of the <textarea> element, and
  // writes the values of its 'dir' attribute and its 'direction' property to
  // verify that the text direction is changed.
  view_->set_delay_seconds_for_form_state_sync(0);
  LoadHTML("<html>"
           "<head>"
           "</head>"
           "<body>"
           "<textarea id=\"test\"></textarea>"
           "<div id=\"result\" contenteditable=\"true\"></div>"
           "</body>"
           "</html>");
  render_thread_.sink().ClearMessages();

  static const struct {
    WebTextDirection direction;
    const wchar_t* expected_result;
  } kTextDirection[] = {
    {WEB_TEXT_DIRECTION_RTL, L"\x000A" L"rtl,rtl"},
    {WEB_TEXT_DIRECTION_LTR, L"\x000A" L"ltr,ltr"},
  };
  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kTextDirection); ++i) {
    // Set the text direction of the <textarea> element.
    ExecuteJavaScript("document.getElementById('test').focus();");
    view_->OnSetTextDirection(kTextDirection[i].direction);

    // Write the values of its DOM 'dir' attribute and its CSS 'direction'
    // property to the <div> element.
    ExecuteJavaScript("var result = document.getElementById('result');"
                      "var node = document.getElementById('test');"
                      "var style = getComputedStyle(node, null);"
                      "result.innerText ="
                      "    node.getAttribute('dir') + ',' +"
                      "    style.getPropertyValue('direction');");

    // Copy the document content to std::wstring and compare with the
    // expected result.
    const int kMaxOutputCharacters = 16;
    std::wstring output;
    GetMainFrame()->GetContentAsPlainText(kMaxOutputCharacters, &output);
    EXPECT_EQ(output, kTextDirection[i].expected_result);
  }
}

// Tests that the bindings for opening a channel to an extension and sending
// and receiving messages through that channel all works.
TEST_F(RenderViewTest, ExtensionMessagesOpenChannel) {
  render_thread_.sink().ClearMessages();
  LoadHTML("<body></body>");
  ExecuteJavaScript(
    "var e = new chromium.Extension('foobar');"
    "var port = e.openChannel();"
    "port.onMessage = doOnMessage;"
    "port.postMessage('content ready');"
    "function doOnMessage(msg, port) {"
    "  alert('content got: ' + msg);"
    "}");

  // Verify that we opened a channel and sent a message through it.
  const IPC::Message* open_channel_msg =
      render_thread_.sink().GetUniqueMessageMatching(
          ViewHostMsg_OpenChannelToExtension::ID);
  EXPECT_TRUE(open_channel_msg);

  const IPC::Message* post_msg =
      render_thread_.sink().GetUniqueMessageMatching(
          ViewHostMsg_ExtensionPostMessage::ID);
  EXPECT_TRUE(post_msg);
  ViewHostMsg_ExtensionPostMessage::Param post_params;
  ViewHostMsg_ExtensionPostMessage::Read(post_msg, &post_params);
  EXPECT_EQ("content ready", post_params.b);

  // Now simulate getting a message back from the other side.
  render_thread_.sink().ClearMessages();
  const int kPortId = 0;
  extensions_v8::RendererExtensionBindings::HandleMessage("42", kPortId);

  // Verify that we got it.
  const IPC::Message* alert_msg =
      render_thread_.sink().GetUniqueMessageMatching(
          ViewHostMsg_RunJavaScriptMessage::ID);
  EXPECT_TRUE(alert_msg);
  void* iter = IPC::SyncMessage::GetDataIterator(alert_msg);
  ViewHostMsg_RunJavaScriptMessage::SendParam alert_param;
  IPC::ReadParam(alert_msg, &iter, &alert_param);
  EXPECT_EQ(L"content got: 42", alert_param.a);
}

// Tests that the bindings for handling a new channel connection and sending
// and receiving messages through that channel all works.
TEST_F(RenderViewTest, ExtensionMessagesOnConnect) {
  LoadHTML("<body></body>");
  ExecuteJavaScript(
    "chromium.addConnectListener(function (port) {"
    "  port.onMessage = doOnMessage;"
    "  port.postMessage('onconnect');"
    "  });"
    "function doOnMessage(msg, port) {"
    "  alert('got: ' + msg);"
    "}");

  render_thread_.sink().ClearMessages();

  // Simulate a new connection being opened.
  const int kPortId = 0;
  extensions_v8::RendererExtensionBindings::HandleConnect(kPortId);

  // Verify that we handled the new connection by posting a message.
  const IPC::Message* post_msg =
      render_thread_.sink().GetUniqueMessageMatching(
          ViewHostMsg_ExtensionPostMessage::ID);
  EXPECT_TRUE(post_msg);
  ViewHostMsg_ExtensionPostMessage::Param post_params;
  ViewHostMsg_ExtensionPostMessage::Read(post_msg, &post_params);
  EXPECT_EQ("onconnect", post_params.b);

  // Now simulate getting a message back from the channel opener.
  render_thread_.sink().ClearMessages();
  extensions_v8::RendererExtensionBindings::HandleMessage("42", kPortId);

  // Verify that we got it.
  const IPC::Message* alert_msg =
      render_thread_.sink().GetUniqueMessageMatching(
          ViewHostMsg_RunJavaScriptMessage::ID);
  EXPECT_TRUE(alert_msg);
  void* iter = IPC::SyncMessage::GetDataIterator(alert_msg);
  ViewHostMsg_RunJavaScriptMessage::SendParam alert_param;
  IPC::ReadParam(alert_msg, &iter, &alert_param);
  EXPECT_EQ(L"got: 42", alert_param.a);
}