// Copyright (c) 2012 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/browser/ui/views/omnibox/omnibox_view_views.h"

#include "base/command_line.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/app/chrome_command_ids.h"
#include "chrome/browser/autocomplete/autocomplete_input.h"
#include "chrome/browser/autocomplete/autocomplete_match.h"
#include "chrome/browser/bookmarks/bookmark_node_data.h"
#include "chrome/browser/command_updater.h"
#include "chrome/browser/search/search.h"
#include "chrome/browser/ui/omnibox/omnibox_edit_controller.h"
#include "chrome/browser/ui/omnibox/omnibox_edit_model.h"
#include "chrome/browser/ui/omnibox/omnibox_popup_model.h"
#include "chrome/browser/ui/view_ids.h"
#include "chrome/browser/ui/views/location_bar/location_bar_view.h"
#include "chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.h"
#include "chrome/common/chrome_switches.h"
#include "content/public/browser/web_contents.h"
#include "extensions/common/constants.h"
#include "grit/app_locale_settings.h"
#include "grit/generated_resources.h"
#include "grit/ui_strings.h"
#include "net/base/escape.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/base/accessibility/accessible_view_state.h"
#include "ui/base/clipboard/scoped_clipboard_writer.h"
#include "ui/base/dragdrop/drag_drop_types.h"
#include "ui/base/dragdrop/os_exchange_data.h"
#include "ui/base/ime/text_input_client.h"
#include "ui/base/ime/text_input_type.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/models/simple_menu_model.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/events/event.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/font_list.h"
#include "ui/gfx/selection_model.h"
#include "ui/views/border.h"
#include "ui/views/button_drag_utils.h"
#include "ui/views/controls/textfield/textfield.h"
#include "ui/views/ime/input_method.h"
#include "ui/views/layout/fill_layout.h"
#include "ui/views/views_delegate.h"
#include "ui/views/widget/widget.h"
#include "url/gurl.h"

#if defined(OS_WIN)
#include "base/win/metro.h"
#include "chrome/browser/browser_process.h"
#endif

#if defined(USE_AURA)
#include "ui/aura/focus_manager.h"
#include "ui/aura/root_window.h"
#include "ui/compositor/layer.h"
#endif

namespace {

// Stores omnibox state for each tab.
struct OmniboxState : public base::SupportsUserData::Data {
  static const char kKey[];

  OmniboxState(const OmniboxEditModel::State& model_state,
               const gfx::SelectionModel& selection_model);
  virtual ~OmniboxState();

  const OmniboxEditModel::State model_state;
  const gfx::SelectionModel selection_model;
};

// static
const char OmniboxState::kKey[] = "OmniboxState";

OmniboxState::OmniboxState(const OmniboxEditModel::State& model_state,
                           const gfx::SelectionModel& selection_model)
    : model_state(model_state),
      selection_model(selection_model) {
}

OmniboxState::~OmniboxState() {}

// We'd like to set the text input type to TEXT_INPUT_TYPE_URL, because this
// triggers URL-specific layout in software keyboards, e.g. adding top-level "/"
// and ".com" keys for English.  However, this also causes IMEs to default to
// Latin character mode, which makes entering search queries difficult for IME
// users.  Therefore, we try to guess whether an IME will be used based on the
// application language, and set the input type accordingly.
ui::TextInputType DetermineTextInputType() {
#if defined(OS_WIN)
  if (base::win::IsTSFAwareRequired()) {
    DCHECK(g_browser_process);
    const std::string& locale = g_browser_process->GetApplicationLocale();
    const std::string& language = locale.substr(0, 2);
    // Assume CJK + Thai users are using an IME.
    if (language == "ja" ||
        language == "ko" ||
        language == "th" ||
        language == "zh")
      return ui::TEXT_INPUT_TYPE_SEARCH;
  }
#endif
  return ui::TEXT_INPUT_TYPE_URL;
}

bool IsOmniboxAutoCompletionForImeEnabled() {
  return !CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kDisableOmniboxAutoCompletionForIme);
}

}  // namespace

// static
const char OmniboxViewViews::kViewClassName[] = "OmniboxViewViews";

OmniboxViewViews::OmniboxViewViews(OmniboxEditController* controller,
                                   Profile* profile,
                                   CommandUpdater* command_updater,
                                   bool popup_window_mode,
                                   LocationBarView* location_bar,
                                   const gfx::FontList& font_list,
                                   int font_y_offset)
    : OmniboxView(profile, controller, command_updater),
      popup_window_mode_(popup_window_mode),
      security_level_(ToolbarModel::NONE),
      ime_composing_before_change_(false),
      delete_at_end_pressed_(false),
      location_bar_view_(location_bar),
      ime_candidate_window_open_(false),
      select_all_on_mouse_release_(false),
      select_all_on_gesture_tap_(false) {
  RemoveBorder();
  set_id(VIEW_ID_OMNIBOX);
  SetFontList(font_list);
  SetVerticalMargins(font_y_offset, 0);
  SetVerticalAlignment(gfx::ALIGN_TOP);
}

OmniboxViewViews::~OmniboxViewViews() {
#if defined(OS_CHROMEOS)
  chromeos::input_method::InputMethodManager::Get()->
      RemoveCandidateWindowObserver(this);
#endif

  // Explicitly teardown members which have a reference to us.  Just to be safe
  // we want them to be destroyed before destroying any other internal state.
  popup_view_.reset();
}

////////////////////////////////////////////////////////////////////////////////
// OmniboxViewViews public:

void OmniboxViewViews::Init() {
  SetController(this);
  SetTextInputType(DetermineTextInputType());
  SetBackgroundColor(location_bar_view_->GetColor(
      ToolbarModel::NONE, LocationBarView::BACKGROUND));

  if (popup_window_mode_)
    SetReadOnly(true);

  // Initialize the popup view using the same font.
  popup_view_.reset(OmniboxPopupContentsView::Create(
      font_list(), this, model(), location_bar_view_));

#if defined(OS_CHROMEOS)
  chromeos::input_method::InputMethodManager::Get()->
      AddCandidateWindowObserver(this);
#endif
}

////////////////////////////////////////////////////////////////////////////////
// OmniboxViewViews, views::Textfield implementation:

const char* OmniboxViewViews::GetClassName() const {
  return kViewClassName;
}

void OmniboxViewViews::OnGestureEvent(ui::GestureEvent* event) {
  views::Textfield::OnGestureEvent(event);
  if (!HasFocus() && event->type() == ui::ET_GESTURE_TAP_DOWN) {
    select_all_on_gesture_tap_ = true;
    return;
  }
  if (select_all_on_gesture_tap_ && event->type() == ui::ET_GESTURE_TAP)
    SelectAll(false);
  select_all_on_gesture_tap_ = false;
}

void OmniboxViewViews::GetAccessibleState(ui::AccessibleViewState* state) {
  location_bar_view_->GetAccessibleState(state);
  state->role = ui::AccessibilityTypes::ROLE_TEXT;
}

bool OmniboxViewViews::OnMousePressed(const ui::MouseEvent& event) {
  select_all_on_mouse_release_ =
      (event.IsOnlyLeftMouseButton() || event.IsOnlyRightMouseButton()) &&
      (!HasFocus() || (model()->focus_state() == OMNIBOX_FOCUS_INVISIBLE));
  // Restore caret visibility whenever the user clicks in the omnibox in a way
  // that would give it focus.  We must handle this case separately here because
  // if the omnibox currently has invisible focus, the mouse event won't trigger
  // either SetFocus() or OmniboxEditModel::OnSetFocus().
  if (select_all_on_mouse_release_)
    model()->SetCaretVisibility(true);
  return views::Textfield::OnMousePressed(event);
}

bool OmniboxViewViews::OnMouseDragged(const ui::MouseEvent& event) {
  select_all_on_mouse_release_ = false;
  return views::Textfield::OnMouseDragged(event);
}

void OmniboxViewViews::OnMouseReleased(const ui::MouseEvent& event) {
  views::Textfield::OnMouseReleased(event);
  // When the user has clicked and released to give us focus, select all unless
  // we're doing search term replacement (in which case refining the existing
  // query is common enough that we do click-to-place-cursor).
  if ((event.IsOnlyLeftMouseButton() || event.IsOnlyRightMouseButton()) &&
      select_all_on_mouse_release_ &&
      !controller()->GetToolbarModel()->WouldPerformSearchTermReplacement(
          false)) {
    // Select all in the reverse direction so as not to scroll the caret
    // into view and shift the contents jarringly.
    SelectAll(true);
  }
  select_all_on_mouse_release_ = false;
}

bool OmniboxViewViews::OnKeyPressed(const ui::KeyEvent& event) {
  // Skip processing of [Alt]+<num-pad digit> Unicode alt key codes.
  // Otherwise, if num-lock is off, the events are handled as [Up], [Down], etc.
  if (event.IsUnicodeKeyCode())
    return views::Textfield::OnKeyPressed(event);

  switch (event.key_code()) {
    case ui::VKEY_RETURN:
      model()->AcceptInput(event.IsAltDown() ? NEW_FOREGROUND_TAB : CURRENT_TAB,
                           false);
      return true;
    case ui::VKEY_ESCAPE:
      return model()->OnEscapeKeyPressed();
    case ui::VKEY_CONTROL:
      model()->OnControlKeyChanged(true);
      break;
    case ui::VKEY_DELETE:
      if (event.IsShiftDown() && model()->popup_model()->IsOpen())
        model()->popup_model()->TryDeletingCurrentItem();
      break;
    case ui::VKEY_UP:
      model()->OnUpOrDownKeyPressed(-1);
      return true;
    case ui::VKEY_DOWN:
      model()->OnUpOrDownKeyPressed(1);
      return true;
    case ui::VKEY_PRIOR:
      if (event.IsControlDown() || event.IsAltDown() ||
          event.IsShiftDown()) {
        return false;
      }
      model()->OnUpOrDownKeyPressed(-1 * model()->result().size());
      return true;
    case ui::VKEY_NEXT:
      if (event.IsControlDown() || event.IsAltDown() ||
          event.IsShiftDown()) {
        return false;
      }
      model()->OnUpOrDownKeyPressed(model()->result().size());
      return true;
    case ui::VKEY_V:
      if (event.IsControlDown() && !read_only()) {
        OnBeforePossibleChange();
        OnPaste();
        OnAfterPossibleChange();
        return true;
      }
      break;
    default:
      break;
  }

  bool handled = views::Textfield::OnKeyPressed(event);
#if !defined(OS_WIN) || defined(USE_AURA)
  // TODO(msw): Avoid this complexity, consolidate cross-platform behavior.
  handled |= SkipDefaultKeyEventProcessing(event);
#endif
  return handled;
}

bool OmniboxViewViews::OnKeyReleased(const ui::KeyEvent& event) {
  // The omnibox contents may change while the control key is pressed.
  if (event.key_code() == ui::VKEY_CONTROL)
    model()->OnControlKeyChanged(false);
  return views::Textfield::OnKeyReleased(event);
}

bool OmniboxViewViews::SkipDefaultKeyEventProcessing(
    const ui::KeyEvent& event) {
  // Handle keyword hint tab-to-search and tabbing through dropdown results.
  // This must run before acclerator handling invokes a focus change on tab.
  if (views::FocusManager::IsTabTraversalKeyEvent(event)) {
    if (model()->is_keyword_hint() && !event.IsShiftDown()) {
      model()->AcceptKeyword(ENTERED_KEYWORD_MODE_VIA_TAB);
      return true;
    }
    if (model()->popup_model()->IsOpen()) {
      if (event.IsShiftDown() &&
          model()->popup_model()->selected_line_state() ==
              OmniboxPopupModel::KEYWORD) {
        model()->ClearKeyword(text());
      } else {
        model()->OnUpOrDownKeyPressed(event.IsShiftDown() ? -1 : 1);
      }
      return true;
    }
  }

  return Textfield::SkipDefaultKeyEventProcessing(event);
}

void OmniboxViewViews::OnFocus() {
  views::Textfield::OnFocus();
  // TODO(oshima): Get control key state.
  model()->OnSetFocus(false);
  // Don't call controller()->OnSetFocus, this view has already acquired focus.

  // Restore a valid saved selection on tab-to-focus.
  if (location_bar_view_->GetWebContents() && !select_all_on_mouse_release_) {
    const OmniboxState* state = static_cast<OmniboxState*>(
        location_bar_view_->GetWebContents()->GetUserData(&OmniboxState::kKey));
    if (state)
      SelectSelectionModel(state->selection_model);
  }
}

void OmniboxViewViews::OnBlur() {
  // Save the selection to restore on tab-to-focus.
  if (location_bar_view_->GetWebContents())
    SaveStateToTab(location_bar_view_->GetWebContents());

  views::Textfield::OnBlur();
  gfx::NativeView native_view = NULL;
#if defined(USE_AURA)
  views::Widget* widget = GetWidget();
  if (widget) {
    aura::client::FocusClient* client =
        aura::client::GetFocusClient(widget->GetNativeView());
    if (client)
      native_view = client->GetFocusedWindow();
  }
#endif
  model()->OnWillKillFocus(native_view);
  // Close the popup.
  CloseOmniboxPopup();
  // Tell the model to reset itself.
  model()->OnKillFocus();
  controller()->OnKillFocus();

  // Make sure the beginning of the text is visible.
  SelectRange(gfx::Range(0));
}

////////////////////////////////////////////////////////////////////////////////
// OmniboxViewViews, OmniboxView implementation:

void OmniboxViewViews::SaveStateToTab(content::WebContents* tab) {
  DCHECK(tab);

  // We don't want to keep the IME status, so force quit the current
  // session here.  It may affect the selection status, so order is
  // also important.
  if (IsIMEComposing()) {
    GetTextInputClient()->ConfirmCompositionText();
    GetInputMethod()->CancelComposition(this);
  }

  // NOTE: GetStateForTabSwitch may affect GetSelection, so order is important.
  OmniboxEditModel::State state = model()->GetStateForTabSwitch();
  const gfx::SelectionModel selection = GetSelectionModel();
  tab->SetUserData(OmniboxState::kKey, new OmniboxState(state, selection));
}

void OmniboxViewViews::OnTabChanged(const content::WebContents* web_contents) {
  security_level_ = controller()->GetToolbarModel()->GetSecurityLevel(false);

  const OmniboxState* state = static_cast<OmniboxState*>(
      web_contents->GetUserData(&OmniboxState::kKey));
  model()->RestoreState(state ? &state->model_state : NULL);
  if (state)
    SelectSelectionModel(state->selection_model);

  // TODO(msw|oshima): Consider saving/restoring edit history.
  ClearEditHistory();
}

void OmniboxViewViews::Update() {
  const ToolbarModel::SecurityLevel old_security_level = security_level_;
  security_level_ = controller()->GetToolbarModel()->GetSecurityLevel(false);
  if (model()->UpdatePermanentText()) {
    // Something visibly changed.  Re-enable search term replacement.
    controller()->GetToolbarModel()->set_search_term_replacement_enabled(true);
    model()->UpdatePermanentText();

    // Tweak: if the user had all the text selected, select all the new text.
    // This makes one particular case better: the user clicks in the box to
    // change it right before the permanent URL is changed.  Since the new URL
    // is still fully selected, the user's typing will replace the edit contents
    // as they'd intended.
    const gfx::Range range(GetSelectedRange());
    const bool was_select_all = (range.length() == text().length());

    RevertAll();

    // Only select all when we have focus.  If we don't have focus, selecting
    // all is unnecessary since the selection will change on regaining focus,
    // and can in fact cause artifacts, e.g. if the user is on the NTP and
    // clicks a link to navigate, causing |was_select_all| to be vacuously true
    // for the empty omnibox, and we then select all here, leading to the
    // trailing portion of a long URL being scrolled into view.  We could try
    // and address cases like this, but it seems better to just not muck with
    // things when the omnibox isn't focused to begin with.
    if (was_select_all && model()->has_focus())
      SelectAll(range.is_reversed());
  } else if (old_security_level != security_level_) {
    EmphasizeURLComponents();
  }
}

string16 OmniboxViewViews::GetText() const {
  // TODO(oshima): IME support
  return text();
}

void OmniboxViewViews::SetWindowTextAndCaretPos(const string16& text,
                                                size_t caret_pos,
                                                bool update_popup,
                                                bool notify_text_changed) {
  const gfx::Range range(caret_pos, caret_pos);
  SetTextAndSelectedRange(text, range);

  if (update_popup)
    UpdatePopup();

  if (notify_text_changed)
    TextChanged();
}

void OmniboxViewViews::SetForcedQuery() {
  const string16 current_text(text());
  const size_t start = current_text.find_first_not_of(kWhitespaceUTF16);
  if (start == string16::npos || (current_text[start] != '?'))
    SetUserText(ASCIIToUTF16("?"));
  else
    SelectRange(gfx::Range(current_text.size(), start + 1));
}

bool OmniboxViewViews::IsSelectAll() const {
  // TODO(oshima): IME support.
  return text() == GetSelectedText();
}

bool OmniboxViewViews::DeleteAtEndPressed() {
  return delete_at_end_pressed_;
}

void OmniboxViewViews::GetSelectionBounds(string16::size_type* start,
                                          string16::size_type* end) const {
  const gfx::Range range = GetSelectedRange();
  *start = static_cast<size_t>(range.start());
  *end = static_cast<size_t>(range.end());
}

void OmniboxViewViews::SelectAll(bool reversed) {
  views::Textfield::SelectAll(reversed);
}

void OmniboxViewViews::UpdatePopup() {
  model()->SetInputInProgress(true);
  if (!model()->has_focus())
    return;

  // Hide the inline autocompletion for IME users.
  location_bar_view_->SetImeInlineAutocompletion(string16());

  // Prevent inline autocomplete when the caret isn't at the end of the text,
  // and during IME composition editing unless
  // |kEnableOmniboxAutoCompletionForIme| is enabled.
  const gfx::Range sel = GetSelectedRange();
  model()->StartAutocomplete(
      !sel.is_empty(),
      sel.GetMax() < text().length() ||
      (IsIMEComposing() && !IsOmniboxAutoCompletionForImeEnabled()));
}

void OmniboxViewViews::SetFocus() {
  RequestFocus();
  // Restore caret visibility if focus is explicitly requested. This is
  // necessary because if we already have invisible focus, the RequestFocus()
  // call above will short-circuit, preventing us from reaching
  // OmniboxEditModel::OnSetFocus(), which handles restoring visibility when the
  // omnibox regains focus after losing focus.
  model()->SetCaretVisibility(true);
}

void OmniboxViewViews::ApplyCaretVisibility() {
  SetCursorEnabled(model()->is_caret_visible());
}

void OmniboxViewViews::OnTemporaryTextMaybeChanged(
    const string16& display_text,
    bool save_original_selection,
    bool notify_text_changed) {
  if (save_original_selection)
    saved_temporary_selection_ = GetSelectedRange();

  SetWindowTextAndCaretPos(display_text, display_text.length(), false,
                           notify_text_changed);
}

bool OmniboxViewViews::OnInlineAutocompleteTextMaybeChanged(
    const string16& display_text,
    size_t user_text_length) {
  if (display_text == text())
    return false;

  if (IsIMEComposing()) {
    location_bar_view_->SetImeInlineAutocompletion(
        display_text.substr(user_text_length));
  } else {
    gfx::Range range(display_text.size(), user_text_length);
    SetTextAndSelectedRange(display_text, range);
  }
  TextChanged();
  return true;
}

void OmniboxViewViews::OnRevertTemporaryText() {
  SelectRange(saved_temporary_selection_);
  // We got here because the user hit the Escape key. We explicitly don't call
  // TextChanged(), since OmniboxPopupModel::ResetToDefaultMatch() has already
  // been called by now, and it would've called TextChanged() if it was
  // warranted.
}

void OmniboxViewViews::OnBeforePossibleChange() {
  // Record our state.
  text_before_change_ = text();
  sel_before_change_ = GetSelectedRange();
  ime_composing_before_change_ = IsIMEComposing();
}

bool OmniboxViewViews::OnAfterPossibleChange() {
  // See if the text or selection have changed since OnBeforePossibleChange().
  const string16 new_text = text();
  const gfx::Range new_sel = GetSelectedRange();
  const bool text_changed = (new_text != text_before_change_) ||
      (ime_composing_before_change_ != IsIMEComposing());
  const bool selection_differs =
      !((sel_before_change_.is_empty() && new_sel.is_empty()) ||
        sel_before_change_.EqualsIgnoringDirection(new_sel));

  // When the user has deleted text, we don't allow inline autocomplete.  Make
  // sure to not flag cases like selecting part of the text and then pasting
  // (or typing) the prefix of that selection.  (We detect these by making
  // sure the caret, which should be after any insertion, hasn't moved
  // forward of the old selection start.)
  const bool just_deleted_text =
      (text_before_change_.length() > new_text.length()) &&
      (new_sel.start() <= sel_before_change_.GetMin());

  const bool something_changed = model()->OnAfterPossibleChange(
      text_before_change_, new_text, new_sel.start(), new_sel.end(),
      selection_differs, text_changed, just_deleted_text, !IsIMEComposing());

  // If only selection was changed, we don't need to call model()'s
  // OnChanged() method, which is called in TextChanged().
  // But we still need to call EmphasizeURLComponents() to make sure the text
  // attributes are updated correctly.
  if (something_changed && text_changed)
    TextChanged();
  else if (selection_differs)
    EmphasizeURLComponents();
  else if (delete_at_end_pressed_)
    model()->OnChanged();

  return something_changed;
}

gfx::NativeView OmniboxViewViews::GetNativeView() const {
  return GetWidget()->GetNativeView();
}

gfx::NativeView OmniboxViewViews::GetRelativeWindowForPopup() const {
  return GetWidget()->GetTopLevelWidget()->GetNativeView();
}

void OmniboxViewViews::SetGrayTextAutocompletion(const string16& input) {
#if defined(OS_WIN) || defined(USE_AURA)
  location_bar_view_->SetGrayTextAutocompletion(input);
#endif
}

string16 OmniboxViewViews::GetGrayTextAutocompletion() const {
#if defined(OS_WIN) || defined(USE_AURA)
  return location_bar_view_->GetGrayTextAutocompletion();
#else
  return string16();
#endif
}

int OmniboxViewViews::TextWidth() const {
  return native_wrapper_->GetWidthNeededForText();
}

bool OmniboxViewViews::IsImeComposing() const {
  return IsIMEComposing();
}

bool OmniboxViewViews::IsImeShowingPopup() const {
#if defined(OS_CHROMEOS)
  return ime_candidate_window_open_;
#else
  const views::InputMethod* input_method = this->GetInputMethod();
  return input_method && input_method->IsCandidatePopupOpen();
#endif
}

int OmniboxViewViews::GetMaxEditWidth(int entry_width) const {
  return entry_width;
}

views::View* OmniboxViewViews::AddToView(views::View* parent) {
  parent->AddChildView(this);
  return this;
}

int OmniboxViewViews::OnPerformDrop(const ui::DropTargetEvent& event) {
  NOTIMPLEMENTED();
  return ui::DragDropTypes::DRAG_NONE;
}

////////////////////////////////////////////////////////////////////////////////
// OmniboxViewViews, views::TextfieldController implementation:

void OmniboxViewViews::ContentsChanged(views::Textfield* sender,
                                       const string16& new_contents) {
}

bool OmniboxViewViews::HandleKeyEvent(views::Textfield* textfield,
                                      const ui::KeyEvent& event) {
  delete_at_end_pressed_ = false;

  if (event.key_code() == ui::VKEY_BACK) {
    // No extra handling is needed in keyword search mode, if there is a
    // non-empty selection, or if the cursor is not leading the text.
    if (model()->is_keyword_hint() || model()->keyword().empty() ||
        HasSelection() || GetCursorPosition() != 0)
      return false;
    model()->ClearKeyword(text());
    return true;
  }

  if (event.key_code() == ui::VKEY_DELETE && !event.IsAltDown()) {
    delete_at_end_pressed_ =
        (!HasSelection() && GetCursorPosition() == text().length());
  }

  // Handle the right-arrow key for LTR text and the left-arrow key for RTL text
  // if there is gray text that needs to be committed.
  if (GetCursorPosition() == text().length()) {
    base::i18n::TextDirection direction = GetTextDirection();
    if ((direction == base::i18n::LEFT_TO_RIGHT &&
         event.key_code() == ui::VKEY_RIGHT) ||
        (direction == base::i18n::RIGHT_TO_LEFT &&
         event.key_code() == ui::VKEY_LEFT)) {
      return model()->CommitSuggestedText();
    }
  }

  return false;
}

void OmniboxViewViews::OnBeforeUserAction(views::Textfield* sender) {
  OnBeforePossibleChange();
}

void OmniboxViewViews::OnAfterUserAction(views::Textfield* sender) {
  OnAfterPossibleChange();
}

void OmniboxViewViews::OnAfterCutOrCopy() {
  ui::Clipboard* cb = ui::Clipboard::GetForCurrentThread();
  string16 selected_text;
  cb->ReadText(ui::Clipboard::BUFFER_STANDARD, &selected_text);
  GURL url;
  bool write_url;
  model()->AdjustTextForCopy(GetSelectedRange().GetMin(), IsSelectAll(),
                             &selected_text, &url, &write_url);
  if (write_url) {
    BookmarkNodeData data;
    data.ReadFromTuple(url, selected_text);
    data.WriteToClipboard();
  } else {
    ui::ScopedClipboardWriter scoped_clipboard_writer(
        ui::Clipboard::GetForCurrentThread(), ui::Clipboard::BUFFER_STANDARD);
    scoped_clipboard_writer.WriteText(selected_text);
  }
}

void OmniboxViewViews::OnGetDragOperationsForTextfield(int* drag_operations) {
  string16 selected_text = GetSelectedText();
  GURL url;
  bool write_url;
  model()->AdjustTextForCopy(GetSelectedRange().GetMin(), IsSelectAll(),
                             &selected_text, &url, &write_url);
  if (write_url)
    *drag_operations |= ui::DragDropTypes::DRAG_LINK;
}

void OmniboxViewViews::OnWriteDragData(ui::OSExchangeData* data) {
  string16 selected_text = GetSelectedText();
  GURL url;
  bool write_url;
  bool is_all_selected = IsSelectAll();
  model()->AdjustTextForCopy(GetSelectedRange().GetMin(), is_all_selected,
                             &selected_text, &url, &write_url);
  data->SetString(selected_text);
  if (write_url) {
    gfx::Image favicon;
    string16 title = selected_text;
    if (is_all_selected)
      model()->GetDataForURLExport(&url, &title, &favicon);
    button_drag_utils::SetURLAndDragImage(url, title, favicon.AsImageSkia(),
                                          data, GetWidget());
    data->SetURL(url, title);
  }
}

void OmniboxViewViews::AppendDropFormats(
    int* formats,
    std::set<ui::OSExchangeData::CustomFormat>* custom_formats) {
  *formats = *formats | ui::OSExchangeData::URL;
}

int OmniboxViewViews::OnDrop(const ui::OSExchangeData& data) {
  if (HasTextBeingDragged())
    return ui::DragDropTypes::DRAG_NONE;

  if (data.HasURL()) {
    GURL url;
    string16 title;
    if (data.GetURLAndTitle(&url, &title)) {
      string16 text(StripJavascriptSchemas(UTF8ToUTF16(url.spec())));
      if (model()->CanPasteAndGo(text)) {
        model()->PasteAndGo(text);
        return ui::DragDropTypes::DRAG_COPY;
      }
    }
  } else if (data.HasString()) {
    string16 text;
    if (data.GetString(&text)) {
      string16 collapsed_text(CollapseWhitespace(text, true));
      if (model()->CanPasteAndGo(collapsed_text))
        model()->PasteAndGo(collapsed_text);
      return ui::DragDropTypes::DRAG_COPY;
    }
  }

  return ui::DragDropTypes::DRAG_NONE;
}

void OmniboxViewViews::UpdateContextMenu(ui::SimpleMenuModel* menu_contents) {
  int paste_position = menu_contents->GetIndexOfCommandId(IDS_APP_PASTE);
  DCHECK_GE(paste_position, 0);
  menu_contents->InsertItemWithStringIdAt(
      paste_position + 1, IDS_PASTE_AND_GO, IDS_PASTE_AND_GO);

  menu_contents->AddSeparator(ui::NORMAL_SEPARATOR);

  if (chrome::IsQueryExtractionEnabled()) {
    int select_all_position = menu_contents->GetIndexOfCommandId(
        IDS_APP_SELECT_ALL);
    DCHECK_GE(select_all_position, 0);
    menu_contents->InsertItemWithStringIdAt(
        select_all_position + 1, IDS_SHOW_URL, IDS_SHOW_URL);
  }

  // Minor note: We use IDC_ for command id here while the underlying textfield
  // is using IDS_ for all its command ids. This is because views cannot depend
  // on IDC_ for now.
  menu_contents->AddItemWithStringId(IDC_EDIT_SEARCH_ENGINES,
      IDS_EDIT_SEARCH_ENGINES);
}

bool OmniboxViewViews::IsCommandIdEnabled(int command_id) const {
  if (command_id == IDS_PASTE_AND_GO)
    return model()->CanPasteAndGo(GetClipboardText());
  if (command_id != IDS_SHOW_URL)
    return command_updater()->IsCommandEnabled(command_id);
  return controller()->GetToolbarModel()->WouldPerformSearchTermReplacement(
      false);
}

bool OmniboxViewViews::IsItemForCommandIdDynamic(int command_id) const {
  return command_id == IDS_PASTE_AND_GO;
}

string16 OmniboxViewViews::GetLabelForCommandId(int command_id) const {
  DCHECK_EQ(IDS_PASTE_AND_GO, command_id);
  return l10n_util::GetStringUTF16(
      model()->IsPasteAndSearch(GetClipboardText()) ?
          IDS_PASTE_AND_SEARCH : IDS_PASTE_AND_GO);
}

bool OmniboxViewViews::HandlesCommand(int command_id) const {
  // See description in OnPaste() for details on why we need to handle paste.
  return command_id == IDS_APP_PASTE;
}

void OmniboxViewViews::ExecuteCommand(int command_id, int event_flags) {
  switch (command_id) {
    // These commands don't invoke the popup via OnBefore/AfterPossibleChange().
    case IDS_PASTE_AND_GO:
      model()->PasteAndGo(GetClipboardText());
      break;
    case IDS_SHOW_URL:
      ShowURL();
      break;
    case IDC_EDIT_SEARCH_ENGINES:
      command_updater()->ExecuteCommand(command_id);
      break;

    default:
      OnBeforePossibleChange();
      if (command_id == IDS_APP_PASTE)
        OnPaste();
      else
        command_updater()->ExecuteCommand(command_id);
      OnAfterPossibleChange();
      break;
  }
}

#if defined(OS_CHROMEOS)
void OmniboxViewViews::CandidateWindowOpened(
      chromeos::input_method::InputMethodManager* manager) {
  ime_candidate_window_open_ = true;
}

void OmniboxViewViews::CandidateWindowClosed(
      chromeos::input_method::InputMethodManager* manager) {
  ime_candidate_window_open_ = false;
}
#endif

////////////////////////////////////////////////////////////////////////////////
// OmniboxViewViews, private:

int OmniboxViewViews::GetOmniboxTextLength() const {
  // TODO(oshima): Support IME.
  return static_cast<int>(text().length());
}

void OmniboxViewViews::EmphasizeURLComponents() {
  // See whether the contents are a URL with a non-empty host portion, which we
  // should emphasize.  To check for a URL, rather than using the type returned
  // by Parse(), ask the model, which will check the desired page transition for
  // this input.  This can tell us whether an UNKNOWN input string is going to
  // be treated as a search or a navigation, and is the same method the Paste
  // And Go system uses.
  url_parse::Component scheme, host;
  AutocompleteInput::ParseForEmphasizeComponents(text(), &scheme, &host);
  bool grey_out_url = text().substr(scheme.begin, scheme.len) ==
      UTF8ToUTF16(extensions::kExtensionScheme);
  bool grey_base = model()->CurrentTextIsURL() &&
      (host.is_nonempty() || grey_out_url);
  SetColor(location_bar_view_->GetColor(
      security_level_,
      grey_base ? LocationBarView::DEEMPHASIZED_TEXT : LocationBarView::TEXT));
  if (grey_base && !grey_out_url) {
    ApplyColor(
        location_bar_view_->GetColor(security_level_, LocationBarView::TEXT),
        gfx::Range(host.begin, host.end()));
  }

  // Emphasize the scheme for security UI display purposes (if necessary).
  // Note that we check CurrentTextIsURL() because if we're replacing search
  // URLs with search terms, we may have a non-URL even when the user is not
  // editing; and in some cases, e.g. for "site:foo.com" searches, the parser
  // may have incorrectly identified a qualifier as a scheme.
  SetStyle(gfx::DIAGONAL_STRIKE, false);
  if (!model()->user_input_in_progress() && model()->CurrentTextIsURL() &&
      scheme.is_nonempty() && (security_level_ != ToolbarModel::NONE)) {
    SkColor security_color = location_bar_view_->GetColor(
        security_level_, LocationBarView::SECURITY_TEXT);
    const bool strike = (security_level_ == ToolbarModel::SECURITY_ERROR);
    const gfx::Range scheme_range(scheme.begin, scheme.end());
    ApplyColor(security_color, scheme_range);
    ApplyStyle(gfx::DIAGONAL_STRIKE, strike, scheme_range);
  }
}

void OmniboxViewViews::SetTextAndSelectedRange(const string16& text,
                                               const gfx::Range& range) {
  SetText(text);
  SelectRange(range);
}

string16 OmniboxViewViews::GetSelectedText() const {
  // TODO(oshima): Support IME.
  return views::Textfield::GetSelectedText();
}

void OmniboxViewViews::OnPaste() {
  const string16 text(GetClipboardText());
  if (!text.empty()) {
    // Record this paste, so we can do different behavior.
    model()->on_paste();
    // Force a Paste operation to trigger the text_changed code in
    // OnAfterPossibleChange(), even if identical contents are pasted.
    text_before_change_.clear();
    InsertOrReplaceText(text);
  }
}