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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/ui/views/omnibox/omnibox_view_views.h"
      6 
      7 #include "base/command_line.h"
      8 #include "base/logging.h"
      9 #include "base/metrics/histogram.h"
     10 #include "base/strings/string_util.h"
     11 #include "base/strings/utf_string_conversions.h"
     12 #include "chrome/app/chrome_command_ids.h"
     13 #include "chrome/browser/autocomplete/autocomplete_input.h"
     14 #include "chrome/browser/autocomplete/autocomplete_match.h"
     15 #include "chrome/browser/command_updater.h"
     16 #include "chrome/browser/search/search.h"
     17 #include "chrome/browser/ui/omnibox/omnibox_edit_controller.h"
     18 #include "chrome/browser/ui/omnibox/omnibox_edit_model.h"
     19 #include "chrome/browser/ui/omnibox/omnibox_popup_model.h"
     20 #include "chrome/browser/ui/view_ids.h"
     21 #include "chrome/browser/ui/views/location_bar/location_bar_view.h"
     22 #include "chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.h"
     23 #include "chrome/browser/ui/views/settings_api_bubble_helper_views.h"
     24 #include "chrome/browser/ui/views/website_settings/website_settings_popup_view.h"
     25 #include "components/bookmarks/browser/bookmark_node_data.h"
     26 #include "content/public/browser/web_contents.h"
     27 #include "extensions/common/constants.h"
     28 #include "grit/app_locale_settings.h"
     29 #include "grit/generated_resources.h"
     30 #include "grit/ui_strings.h"
     31 #include "net/base/escape.h"
     32 #include "third_party/skia/include/core/SkColor.h"
     33 #include "ui/accessibility/ax_view_state.h"
     34 #include "ui/aura/client/focus_client.h"
     35 #include "ui/aura/window_event_dispatcher.h"
     36 #include "ui/base/clipboard/scoped_clipboard_writer.h"
     37 #include "ui/base/dragdrop/drag_drop_types.h"
     38 #include "ui/base/dragdrop/os_exchange_data.h"
     39 #include "ui/base/ime/text_input_client.h"
     40 #include "ui/base/ime/text_input_type.h"
     41 #include "ui/base/l10n/l10n_util.h"
     42 #include "ui/base/models/simple_menu_model.h"
     43 #include "ui/base/resource/resource_bundle.h"
     44 #include "ui/compositor/layer.h"
     45 #include "ui/events/event.h"
     46 #include "ui/gfx/canvas.h"
     47 #include "ui/gfx/font_list.h"
     48 #include "ui/gfx/selection_model.h"
     49 #include "ui/views/border.h"
     50 #include "ui/views/button_drag_utils.h"
     51 #include "ui/views/controls/textfield/textfield.h"
     52 #include "ui/views/ime/input_method.h"
     53 #include "ui/views/layout/fill_layout.h"
     54 #include "ui/views/views_delegate.h"
     55 #include "ui/views/widget/widget.h"
     56 #include "url/gurl.h"
     57 
     58 #if defined(OS_WIN)
     59 #include "chrome/browser/browser_process.h"
     60 #endif
     61 
     62 
     63 namespace {
     64 
     65 // OmniboxState ---------------------------------------------------------------
     66 
     67 // Stores omnibox state for each tab.
     68 struct OmniboxState : public base::SupportsUserData::Data {
     69   static const char kKey[];
     70 
     71   OmniboxState(const OmniboxEditModel::State& model_state,
     72                const gfx::Range& selection,
     73                const gfx::Range& saved_selection_for_focus_change);
     74   virtual ~OmniboxState();
     75 
     76   const OmniboxEditModel::State model_state;
     77 
     78   // We store both the actual selection and any saved selection (for when the
     79   // omnibox is not focused).  This allows us to properly handle cases like
     80   // selecting text, tabbing out of the omnibox, switching tabs away and back,
     81   // and tabbing back into the omnibox.
     82   const gfx::Range selection;
     83   const gfx::Range saved_selection_for_focus_change;
     84 };
     85 
     86 // static
     87 const char OmniboxState::kKey[] = "OmniboxState";
     88 
     89 OmniboxState::OmniboxState(const OmniboxEditModel::State& model_state,
     90                            const gfx::Range& selection,
     91                            const gfx::Range& saved_selection_for_focus_change)
     92     : model_state(model_state),
     93       selection(selection),
     94       saved_selection_for_focus_change(saved_selection_for_focus_change) {
     95 }
     96 
     97 OmniboxState::~OmniboxState() {
     98 }
     99 
    100 
    101 // Helpers --------------------------------------------------------------------
    102 
    103 // We'd like to set the text input type to TEXT_INPUT_TYPE_URL, because this
    104 // triggers URL-specific layout in software keyboards, e.g. adding top-level "/"
    105 // and ".com" keys for English.  However, this also causes IMEs to default to
    106 // Latin character mode, which makes entering search queries difficult for IME
    107 // users.  Therefore, we try to guess whether an IME will be used based on the
    108 // application language, and set the input type accordingly.
    109 ui::TextInputType DetermineTextInputType() {
    110 #if defined(OS_WIN)
    111   DCHECK(g_browser_process);
    112   const std::string& locale = g_browser_process->GetApplicationLocale();
    113   const std::string& language = locale.substr(0, 2);
    114   // Assume CJK + Thai users are using an IME.
    115   if (language == "ja" ||
    116       language == "ko" ||
    117       language == "th" ||
    118       language == "zh")
    119     return ui::TEXT_INPUT_TYPE_SEARCH;
    120 #endif
    121   return ui::TEXT_INPUT_TYPE_URL;
    122 }
    123 
    124 }  // namespace
    125 
    126 
    127 // OmniboxViewViews -----------------------------------------------------------
    128 
    129 // static
    130 const char OmniboxViewViews::kViewClassName[] = "OmniboxViewViews";
    131 
    132 OmniboxViewViews::OmniboxViewViews(OmniboxEditController* controller,
    133                                    Profile* profile,
    134                                    CommandUpdater* command_updater,
    135                                    bool popup_window_mode,
    136                                    LocationBarView* location_bar,
    137                                    const gfx::FontList& font_list)
    138     : OmniboxView(profile, controller, command_updater),
    139       popup_window_mode_(popup_window_mode),
    140       security_level_(ToolbarModel::NONE),
    141       saved_selection_for_focus_change_(gfx::Range::InvalidRange()),
    142       ime_composing_before_change_(false),
    143       delete_at_end_pressed_(false),
    144       location_bar_view_(location_bar),
    145       ime_candidate_window_open_(false),
    146       select_all_on_mouse_release_(false),
    147       select_all_on_gesture_tap_(false) {
    148   SetBorder(views::Border::NullBorder());
    149   set_id(VIEW_ID_OMNIBOX);
    150   SetFontList(font_list);
    151 }
    152 
    153 OmniboxViewViews::~OmniboxViewViews() {
    154 #if defined(OS_CHROMEOS)
    155   chromeos::input_method::InputMethodManager::Get()->
    156       RemoveCandidateWindowObserver(this);
    157 #endif
    158 
    159   // Explicitly teardown members which have a reference to us.  Just to be safe
    160   // we want them to be destroyed before destroying any other internal state.
    161   popup_view_.reset();
    162 }
    163 
    164 void OmniboxViewViews::Init() {
    165   set_controller(this);
    166   SetTextInputType(DetermineTextInputType());
    167 
    168   if (popup_window_mode_)
    169     SetReadOnly(true);
    170 
    171   // Initialize the popup view using the same font.
    172   popup_view_.reset(OmniboxPopupContentsView::Create(
    173       GetFontList(), this, model(), location_bar_view_));
    174 
    175 #if defined(OS_CHROMEOS)
    176   chromeos::input_method::InputMethodManager::Get()->
    177       AddCandidateWindowObserver(this);
    178 #endif
    179 }
    180 
    181 void OmniboxViewViews::SaveStateToTab(content::WebContents* tab) {
    182   DCHECK(tab);
    183 
    184   // We don't want to keep the IME status, so force quit the current
    185   // session here.  It may affect the selection status, so order is
    186   // also important.
    187   if (IsIMEComposing()) {
    188     GetTextInputClient()->ConfirmCompositionText();
    189     GetInputMethod()->CancelComposition(this);
    190   }
    191 
    192   // NOTE: GetStateForTabSwitch() may affect GetSelectedRange(), so order is
    193   // important.
    194   OmniboxEditModel::State state = model()->GetStateForTabSwitch();
    195   tab->SetUserData(OmniboxState::kKey, new OmniboxState(
    196       state, GetSelectedRange(), saved_selection_for_focus_change_));
    197 }
    198 
    199 void OmniboxViewViews::OnTabChanged(const content::WebContents* web_contents) {
    200   security_level_ = controller()->GetToolbarModel()->GetSecurityLevel(false);
    201 
    202   const OmniboxState* state = static_cast<OmniboxState*>(
    203       web_contents->GetUserData(&OmniboxState::kKey));
    204   model()->RestoreState(state ? &state->model_state : NULL);
    205   if (state) {
    206     // This assumes that the omnibox has already been focused or blurred as
    207     // appropriate; otherwise, a subsequent OnFocus() or OnBlur() call could
    208     // goof up the selection.  See comments at the end of
    209     // BrowserView::ActiveTabChanged().
    210     SelectRange(state->selection);
    211     saved_selection_for_focus_change_ = state->saved_selection_for_focus_change;
    212   }
    213 
    214   // TODO(msw|oshima): Consider saving/restoring edit history.
    215   ClearEditHistory();
    216 }
    217 
    218 void OmniboxViewViews::Update() {
    219   if (chrome::ShouldDisplayOriginChip())
    220     set_placeholder_text(GetHintText());
    221 
    222   const ToolbarModel::SecurityLevel old_security_level = security_level_;
    223   security_level_ = controller()->GetToolbarModel()->GetSecurityLevel(false);
    224   if (model()->UpdatePermanentText()) {
    225     // Something visibly changed.  Re-enable URL replacement.
    226     controller()->GetToolbarModel()->set_url_replacement_enabled(true);
    227     controller()->GetToolbarModel()->set_origin_chip_enabled(true);
    228     model()->UpdatePermanentText();
    229 
    230     // Select all the new text if the user had all the old text selected, or if
    231     // there was no previous text (for new tab page URL replacement extensions).
    232     // This makes one particular case better: the user clicks in the box to
    233     // change it right before the permanent URL is changed.  Since the new URL
    234     // is still fully selected, the user's typing will replace the edit contents
    235     // as they'd intended.
    236     const bool was_select_all = IsSelectAll();
    237     const bool was_reversed = GetSelectedRange().is_reversed();
    238 
    239     RevertAll();
    240 
    241     // Only select all when we have focus.  If we don't have focus, selecting
    242     // all is unnecessary since the selection will change on regaining focus,
    243     // and can in fact cause artifacts, e.g. if the user is on the NTP and
    244     // clicks a link to navigate, causing |was_select_all| to be vacuously true
    245     // for the empty omnibox, and we then select all here, leading to the
    246     // trailing portion of a long URL being scrolled into view.  We could try
    247     // and address cases like this, but it seems better to just not muck with
    248     // things when the omnibox isn't focused to begin with.
    249     if (was_select_all && model()->has_focus())
    250       SelectAll(was_reversed);
    251   } else if (old_security_level != security_level_) {
    252     EmphasizeURLComponents();
    253   }
    254 }
    255 
    256 base::string16 OmniboxViewViews::GetText() const {
    257   // TODO(oshima): IME support
    258   return text();
    259 }
    260 
    261 void OmniboxViewViews::SetUserText(const base::string16& text,
    262                                    const base::string16& display_text,
    263                                    bool update_popup) {
    264   saved_selection_for_focus_change_ = gfx::Range::InvalidRange();
    265   OmniboxView::SetUserText(text, display_text, update_popup);
    266 }
    267 
    268 void OmniboxViewViews::SetForcedQuery() {
    269   const base::string16 current_text(text());
    270   const size_t start = current_text.find_first_not_of(base::kWhitespaceUTF16);
    271   if (start == base::string16::npos || (current_text[start] != '?'))
    272     OmniboxView::SetUserText(base::ASCIIToUTF16("?"));
    273   else
    274     SelectRange(gfx::Range(current_text.size(), start + 1));
    275 }
    276 
    277 void OmniboxViewViews::GetSelectionBounds(
    278     base::string16::size_type* start,
    279     base::string16::size_type* end) const {
    280   const gfx::Range range = GetSelectedRange();
    281   *start = static_cast<size_t>(range.start());
    282   *end = static_cast<size_t>(range.end());
    283 }
    284 
    285 void OmniboxViewViews::SelectAll(bool reversed) {
    286   views::Textfield::SelectAll(reversed);
    287 }
    288 
    289 void OmniboxViewViews::RevertAll() {
    290   saved_selection_for_focus_change_ = gfx::Range::InvalidRange();
    291   OmniboxView::RevertAll();
    292 }
    293 
    294 void OmniboxViewViews::SetFocus() {
    295   RequestFocus();
    296   // Restore caret visibility if focus is explicitly requested. This is
    297   // necessary because if we already have invisible focus, the RequestFocus()
    298   // call above will short-circuit, preventing us from reaching
    299   // OmniboxEditModel::OnSetFocus(), which handles restoring visibility when the
    300   // omnibox regains focus after losing focus.
    301   model()->SetCaretVisibility(true);
    302 }
    303 
    304 int OmniboxViewViews::GetTextWidth() const {
    305   // Returns the width necessary to display the current text, including any
    306   // necessary space for the cursor or border/margin.
    307   return GetRenderText()->GetContentWidth() + GetInsets().width();
    308 }
    309 
    310 bool OmniboxViewViews::IsImeComposing() const {
    311   return IsIMEComposing();
    312 }
    313 
    314 gfx::Size OmniboxViewViews::GetMinimumSize() const {
    315   const int kMinCharacters = 10;
    316   return gfx::Size(
    317       GetFontList().GetExpectedTextWidth(kMinCharacters) + GetInsets().width(),
    318       GetPreferredSize().height());
    319 }
    320 
    321 void OmniboxViewViews::OnNativeThemeChanged(const ui::NativeTheme* theme) {
    322   views::Textfield::OnNativeThemeChanged(theme);
    323   SetBackgroundColor(location_bar_view_->GetColor(
    324       ToolbarModel::NONE, LocationBarView::BACKGROUND));
    325   EmphasizeURLComponents();
    326 }
    327 
    328 void OmniboxViewViews::ExecuteCommand(int command_id, int event_flags) {
    329   // In the base class, touch text selection is deactivated when a command is
    330   // executed. Since we are not always calling the base class implementation
    331   // here, we need to deactivate touch text selection here, too.
    332   DestroyTouchSelection();
    333   switch (command_id) {
    334     // These commands don't invoke the popup via OnBefore/AfterPossibleChange().
    335     case IDS_PASTE_AND_GO:
    336       model()->PasteAndGo(GetClipboardText());
    337       break;
    338     case IDS_SHOW_URL:
    339       controller()->ShowURL();
    340       break;
    341     case IDC_EDIT_SEARCH_ENGINES:
    342       command_updater()->ExecuteCommand(command_id);
    343       break;
    344     case IDS_MOVE_DOWN:
    345     case IDS_MOVE_UP:
    346       model()->OnUpOrDownKeyPressed(command_id == IDS_MOVE_DOWN ? 1 : -1);
    347       break;
    348 
    349     default:
    350       OnBeforePossibleChange();
    351       if (command_id == IDS_APP_PASTE)
    352         OnPaste();
    353       else if (Textfield::IsCommandIdEnabled(command_id))
    354         Textfield::ExecuteCommand(command_id, event_flags);
    355       else
    356         command_updater()->ExecuteCommand(command_id);
    357       OnAfterPossibleChange();
    358       break;
    359   }
    360 }
    361 
    362 void OmniboxViewViews::SetTextAndSelectedRange(const base::string16& text,
    363                                                const gfx::Range& range) {
    364   SetText(text);
    365   SelectRange(range);
    366 }
    367 
    368 base::string16 OmniboxViewViews::GetSelectedText() const {
    369   // TODO(oshima): Support IME.
    370   return views::Textfield::GetSelectedText();
    371 }
    372 
    373 void OmniboxViewViews::OnPaste() {
    374   const base::string16 text(GetClipboardText());
    375   if (!text.empty()) {
    376     // Record this paste, so we can do different behavior.
    377     model()->OnPaste();
    378     // Force a Paste operation to trigger the text_changed code in
    379     // OnAfterPossibleChange(), even if identical contents are pasted.
    380     text_before_change_.clear();
    381     InsertOrReplaceText(text);
    382   }
    383 }
    384 
    385 bool OmniboxViewViews::HandleEarlyTabActions(const ui::KeyEvent& event) {
    386   // This must run before acclerator handling invokes a focus change on tab.
    387   // Note the parallel with SkipDefaultKeyEventProcessing above.
    388   if (views::FocusManager::IsTabTraversalKeyEvent(event)) {
    389     if (model()->is_keyword_hint() && !event.IsShiftDown()) {
    390       model()->AcceptKeyword(ENTERED_KEYWORD_MODE_VIA_TAB);
    391       return true;
    392     }
    393     if (model()->popup_model()->IsOpen()) {
    394       if (event.IsShiftDown() &&
    395           model()->popup_model()->selected_line_state() ==
    396               OmniboxPopupModel::KEYWORD) {
    397         model()->ClearKeyword(text());
    398       } else {
    399         model()->OnUpOrDownKeyPressed(event.IsShiftDown() ? -1 : 1);
    400       }
    401       return true;
    402     }
    403   }
    404 
    405   return false;
    406 }
    407 
    408 void OmniboxViewViews::SetWindowTextAndCaretPos(const base::string16& text,
    409                                                 size_t caret_pos,
    410                                                 bool update_popup,
    411                                                 bool notify_text_changed) {
    412   const gfx::Range range(caret_pos, caret_pos);
    413   SetTextAndSelectedRange(text, range);
    414 
    415   if (update_popup)
    416     UpdatePopup();
    417 
    418   if (notify_text_changed)
    419     TextChanged();
    420 }
    421 
    422 bool OmniboxViewViews::IsSelectAll() const {
    423   // TODO(oshima): IME support.
    424   return text() == GetSelectedText();
    425 }
    426 
    427 bool OmniboxViewViews::DeleteAtEndPressed() {
    428   return delete_at_end_pressed_;
    429 }
    430 
    431 void OmniboxViewViews::UpdatePopup() {
    432   model()->SetInputInProgress(true);
    433   if (!model()->has_focus())
    434     return;
    435 
    436   // Prevent inline autocomplete when the caret isn't at the end of the text.
    437   const gfx::Range sel = GetSelectedRange();
    438   model()->StartAutocomplete(!sel.is_empty(), sel.GetMax() < text().length());
    439 }
    440 
    441 void OmniboxViewViews::ApplyCaretVisibility() {
    442   SetCursorEnabled(model()->is_caret_visible());
    443 }
    444 
    445 void OmniboxViewViews::OnTemporaryTextMaybeChanged(
    446     const base::string16& display_text,
    447     bool save_original_selection,
    448     bool notify_text_changed) {
    449   if (save_original_selection)
    450     saved_temporary_selection_ = GetSelectedRange();
    451 
    452   SetWindowTextAndCaretPos(display_text, display_text.length(), false,
    453                            notify_text_changed);
    454 }
    455 
    456 bool OmniboxViewViews::OnInlineAutocompleteTextMaybeChanged(
    457     const base::string16& display_text,
    458     size_t user_text_length) {
    459   if (display_text == text())
    460     return false;
    461 
    462   if (IsIMEComposing()) {
    463     location_bar_view_->SetImeInlineAutocompletion(
    464         display_text.substr(user_text_length));
    465   } else {
    466     gfx::Range range(display_text.size(), user_text_length);
    467     SetTextAndSelectedRange(display_text, range);
    468   }
    469   TextChanged();
    470   return true;
    471 }
    472 
    473 void OmniboxViewViews::OnInlineAutocompleteTextCleared() {
    474   // Hide the inline autocompletion for IME users.
    475   location_bar_view_->SetImeInlineAutocompletion(base::string16());
    476 }
    477 
    478 void OmniboxViewViews::OnRevertTemporaryText() {
    479   SelectRange(saved_temporary_selection_);
    480   // We got here because the user hit the Escape key. We explicitly don't call
    481   // TextChanged(), since OmniboxPopupModel::ResetToDefaultMatch() has already
    482   // been called by now, and it would've called TextChanged() if it was
    483   // warranted.
    484 }
    485 
    486 void OmniboxViewViews::OnBeforePossibleChange() {
    487   // Record our state.
    488   text_before_change_ = text();
    489   sel_before_change_ = GetSelectedRange();
    490   ime_composing_before_change_ = IsIMEComposing();
    491 }
    492 
    493 bool OmniboxViewViews::OnAfterPossibleChange() {
    494   // See if the text or selection have changed since OnBeforePossibleChange().
    495   const base::string16 new_text = text();
    496   const gfx::Range new_sel = GetSelectedRange();
    497   const bool text_changed = (new_text != text_before_change_) ||
    498       (ime_composing_before_change_ != IsIMEComposing());
    499   const bool selection_differs =
    500       !((sel_before_change_.is_empty() && new_sel.is_empty()) ||
    501         sel_before_change_.EqualsIgnoringDirection(new_sel));
    502 
    503   // When the user has deleted text, we don't allow inline autocomplete.  Make
    504   // sure to not flag cases like selecting part of the text and then pasting
    505   // (or typing) the prefix of that selection.  (We detect these by making
    506   // sure the caret, which should be after any insertion, hasn't moved
    507   // forward of the old selection start.)
    508   const bool just_deleted_text =
    509       (text_before_change_.length() > new_text.length()) &&
    510       (new_sel.start() <= sel_before_change_.GetMin());
    511 
    512   const bool something_changed = model()->OnAfterPossibleChange(
    513       text_before_change_, new_text, new_sel.start(), new_sel.end(),
    514       selection_differs, text_changed, just_deleted_text, !IsIMEComposing());
    515 
    516   // If only selection was changed, we don't need to call model()'s
    517   // OnChanged() method, which is called in TextChanged().
    518   // But we still need to call EmphasizeURLComponents() to make sure the text
    519   // attributes are updated correctly.
    520   if (something_changed && text_changed)
    521     TextChanged();
    522   else if (selection_differs)
    523     EmphasizeURLComponents();
    524   else if (delete_at_end_pressed_)
    525     model()->OnChanged();
    526 
    527   return something_changed;
    528 }
    529 
    530 gfx::NativeView OmniboxViewViews::GetNativeView() const {
    531   return GetWidget()->GetNativeView();
    532 }
    533 
    534 gfx::NativeView OmniboxViewViews::GetRelativeWindowForPopup() const {
    535   return GetWidget()->GetTopLevelWidget()->GetNativeView();
    536 }
    537 
    538 void OmniboxViewViews::SetGrayTextAutocompletion(const base::string16& input) {
    539   location_bar_view_->SetGrayTextAutocompletion(input);
    540 }
    541 
    542 base::string16 OmniboxViewViews::GetGrayTextAutocompletion() const {
    543   return location_bar_view_->GetGrayTextAutocompletion();
    544 }
    545 
    546 int OmniboxViewViews::GetWidth() const {
    547   return location_bar_view_->width();
    548 }
    549 
    550 bool OmniboxViewViews::IsImeShowingPopup() const {
    551 #if defined(OS_CHROMEOS)
    552   return ime_candidate_window_open_;
    553 #else
    554   const views::InputMethod* input_method = this->GetInputMethod();
    555   return input_method && input_method->IsCandidatePopupOpen();
    556 #endif
    557 }
    558 
    559 void OmniboxViewViews::ShowImeIfNeeded() {
    560   GetInputMethod()->ShowImeIfNeeded();
    561 }
    562 
    563 void OmniboxViewViews::OnMatchOpened(const AutocompleteMatch& match,
    564                                      Profile* profile,
    565                                      content::WebContents* web_contents) const {
    566   extensions::MaybeShowExtensionControlledSearchNotification(
    567       profile, web_contents, match);
    568 }
    569 
    570 int OmniboxViewViews::GetOmniboxTextLength() const {
    571   // TODO(oshima): Support IME.
    572   return static_cast<int>(text().length());
    573 }
    574 
    575 void OmniboxViewViews::EmphasizeURLComponents() {
    576   // See whether the contents are a URL with a non-empty host portion, which we
    577   // should emphasize.  To check for a URL, rather than using the type returned
    578   // by Parse(), ask the model, which will check the desired page transition for
    579   // this input.  This can tell us whether an UNKNOWN input string is going to
    580   // be treated as a search or a navigation, and is the same method the Paste
    581   // And Go system uses.
    582   url::Component scheme, host;
    583   AutocompleteInput::ParseForEmphasizeComponents(text(), &scheme, &host);
    584   bool grey_out_url = text().substr(scheme.begin, scheme.len) ==
    585       base::UTF8ToUTF16(extensions::kExtensionScheme);
    586   bool grey_base = model()->CurrentTextIsURL() &&
    587       (host.is_nonempty() || grey_out_url);
    588   SetColor(location_bar_view_->GetColor(
    589       security_level_,
    590       grey_base ? LocationBarView::DEEMPHASIZED_TEXT : LocationBarView::TEXT));
    591   if (grey_base && !grey_out_url) {
    592     ApplyColor(
    593         location_bar_view_->GetColor(security_level_, LocationBarView::TEXT),
    594         gfx::Range(host.begin, host.end()));
    595   }
    596 
    597   // Emphasize the scheme for security UI display purposes (if necessary).
    598   // Note that we check CurrentTextIsURL() because if we're replacing search
    599   // URLs with search terms, we may have a non-URL even when the user is not
    600   // editing; and in some cases, e.g. for "site:foo.com" searches, the parser
    601   // may have incorrectly identified a qualifier as a scheme.
    602   SetStyle(gfx::DIAGONAL_STRIKE, false);
    603   if (!model()->user_input_in_progress() && model()->CurrentTextIsURL() &&
    604       scheme.is_nonempty() && (security_level_ != ToolbarModel::NONE)) {
    605     SkColor security_color = location_bar_view_->GetColor(
    606         security_level_, LocationBarView::SECURITY_TEXT);
    607     const bool strike = (security_level_ == ToolbarModel::SECURITY_ERROR);
    608     const gfx::Range scheme_range(scheme.begin, scheme.end());
    609     ApplyColor(security_color, scheme_range);
    610     ApplyStyle(gfx::DIAGONAL_STRIKE, strike, scheme_range);
    611   }
    612 }
    613 
    614 bool OmniboxViewViews::OnKeyReleased(const ui::KeyEvent& event) {
    615   // The omnibox contents may change while the control key is pressed.
    616   if (event.key_code() == ui::VKEY_CONTROL)
    617     model()->OnControlKeyChanged(false);
    618   return views::Textfield::OnKeyReleased(event);
    619 }
    620 
    621 bool OmniboxViewViews::IsItemForCommandIdDynamic(int command_id) const {
    622   return command_id == IDS_PASTE_AND_GO;
    623 }
    624 
    625 base::string16 OmniboxViewViews::GetLabelForCommandId(int command_id) const {
    626   DCHECK_EQ(IDS_PASTE_AND_GO, command_id);
    627   return l10n_util::GetStringUTF16(
    628       model()->IsPasteAndSearch(GetClipboardText()) ?
    629           IDS_PASTE_AND_SEARCH : IDS_PASTE_AND_GO);
    630 }
    631 
    632 const char* OmniboxViewViews::GetClassName() const {
    633   return kViewClassName;
    634 }
    635 
    636 bool OmniboxViewViews::OnMousePressed(const ui::MouseEvent& event) {
    637   select_all_on_mouse_release_ =
    638       (event.IsOnlyLeftMouseButton() || event.IsOnlyRightMouseButton()) &&
    639       (!HasFocus() || (model()->focus_state() == OMNIBOX_FOCUS_INVISIBLE));
    640   if (select_all_on_mouse_release_) {
    641     // Restore caret visibility whenever the user clicks in the omnibox in a way
    642     // that would give it focus.  We must handle this case separately here
    643     // because if the omnibox currently has invisible focus, the mouse event
    644     // won't trigger either SetFocus() or OmniboxEditModel::OnSetFocus().
    645     model()->SetCaretVisibility(true);
    646 
    647     // When we're going to select all on mouse release, invalidate any saved
    648     // selection lest restoring it fights with the "select all" action.  It's
    649     // possible to later set select_all_on_mouse_release_ back to false, but
    650     // that happens for things like dragging, which are cases where having
    651     // invalidated this saved selection is still OK.
    652     saved_selection_for_focus_change_ = gfx::Range::InvalidRange();
    653   }
    654   return views::Textfield::OnMousePressed(event);
    655 }
    656 
    657 bool OmniboxViewViews::OnMouseDragged(const ui::MouseEvent& event) {
    658   if (ExceededDragThreshold(event.location() - last_click_location()))
    659     select_all_on_mouse_release_ = false;
    660 
    661   if (HasTextBeingDragged())
    662     CloseOmniboxPopup();
    663 
    664   return views::Textfield::OnMouseDragged(event);
    665 }
    666 
    667 void OmniboxViewViews::OnMouseReleased(const ui::MouseEvent& event) {
    668   views::Textfield::OnMouseReleased(event);
    669   if (event.IsOnlyLeftMouseButton() || event.IsOnlyRightMouseButton()) {
    670     // When the user has clicked and released to give us focus, select all
    671     // unless we're omitting the URL (in which case refining an existing query
    672     // is common enough that we do click-to-place-cursor).
    673     if (select_all_on_mouse_release_ &&
    674         !controller()->GetToolbarModel()->WouldReplaceURL()) {
    675       // Select all in the reverse direction so as not to scroll the caret
    676       // into view and shift the contents jarringly.
    677       SelectAll(true);
    678     }
    679 
    680     HandleOriginChipMouseRelease();
    681   }
    682   select_all_on_mouse_release_ = false;
    683 }
    684 
    685 bool OmniboxViewViews::OnKeyPressed(const ui::KeyEvent& event) {
    686   // Skip processing of [Alt]+<num-pad digit> Unicode alt key codes.
    687   // Otherwise, if num-lock is off, the events are handled as [Up], [Down], etc.
    688   if (event.IsUnicodeKeyCode())
    689     return views::Textfield::OnKeyPressed(event);
    690 
    691   const bool shift = event.IsShiftDown();
    692   const bool control = event.IsControlDown();
    693   const bool alt = event.IsAltDown() || event.IsAltGrDown();
    694   switch (event.key_code()) {
    695     case ui::VKEY_RETURN:
    696       model()->AcceptInput(alt ? NEW_FOREGROUND_TAB : CURRENT_TAB, false);
    697       return true;
    698     case ui::VKEY_ESCAPE:
    699       return model()->OnEscapeKeyPressed();
    700     case ui::VKEY_CONTROL:
    701       model()->OnControlKeyChanged(true);
    702       break;
    703     case ui::VKEY_DELETE:
    704       if (shift && model()->popup_model()->IsOpen())
    705         model()->popup_model()->TryDeletingCurrentItem();
    706       break;
    707     case ui::VKEY_UP:
    708       if (!read_only()) {
    709         model()->OnUpOrDownKeyPressed(-1);
    710         return true;
    711       }
    712       break;
    713     case ui::VKEY_DOWN:
    714       if (!read_only()) {
    715         model()->OnUpOrDownKeyPressed(1);
    716         return true;
    717       }
    718       break;
    719     case ui::VKEY_PRIOR:
    720       if (control || alt || shift)
    721         return false;
    722       model()->OnUpOrDownKeyPressed(-1 * model()->result().size());
    723       return true;
    724     case ui::VKEY_NEXT:
    725       if (control || alt || shift)
    726         return false;
    727       model()->OnUpOrDownKeyPressed(model()->result().size());
    728       return true;
    729     case ui::VKEY_V:
    730       if (control && !alt && !read_only()) {
    731         ExecuteCommand(IDS_APP_PASTE, 0);
    732         return true;
    733       }
    734       break;
    735     case ui::VKEY_INSERT:
    736       if (shift && !control && !read_only()) {
    737         ExecuteCommand(IDS_APP_PASTE, 0);
    738         return true;
    739       }
    740       break;
    741     default:
    742       break;
    743   }
    744 
    745   return views::Textfield::OnKeyPressed(event) || HandleEarlyTabActions(event);
    746 }
    747 
    748 void OmniboxViewViews::OnGestureEvent(ui::GestureEvent* event) {
    749   if (!HasFocus() && event->type() == ui::ET_GESTURE_TAP_DOWN) {
    750     select_all_on_gesture_tap_ = true;
    751 
    752     // If we're trying to select all on tap, invalidate any saved selection lest
    753     // restoring it fights with the "select all" action.
    754     saved_selection_for_focus_change_ = gfx::Range::InvalidRange();
    755   }
    756 
    757   if (select_all_on_gesture_tap_ && event->type() == ui::ET_GESTURE_TAP)
    758     SelectAll(false);
    759 
    760   if (event->type() == ui::ET_GESTURE_TAP ||
    761       event->type() == ui::ET_GESTURE_TAP_CANCEL ||
    762       event->type() == ui::ET_GESTURE_TWO_FINGER_TAP ||
    763       event->type() == ui::ET_GESTURE_SCROLL_BEGIN ||
    764       event->type() == ui::ET_GESTURE_PINCH_BEGIN ||
    765       event->type() == ui::ET_GESTURE_LONG_PRESS ||
    766       event->type() == ui::ET_GESTURE_LONG_TAP) {
    767     select_all_on_gesture_tap_ = false;
    768   }
    769 
    770   views::Textfield::OnGestureEvent(event);
    771 }
    772 
    773 void OmniboxViewViews::AboutToRequestFocusFromTabTraversal(bool reverse) {
    774   views::Textfield::AboutToRequestFocusFromTabTraversal(reverse);
    775   // Tabbing into the omnibox should affect the origin chip in the same way
    776   // clicking it should.
    777   HandleOriginChipMouseRelease();
    778 }
    779 
    780 bool OmniboxViewViews::SkipDefaultKeyEventProcessing(
    781     const ui::KeyEvent& event) {
    782   if (views::FocusManager::IsTabTraversalKeyEvent(event) &&
    783       ((model()->is_keyword_hint() && !event.IsShiftDown()) ||
    784        model()->popup_model()->IsOpen())) {
    785     return true;
    786   }
    787   return Textfield::SkipDefaultKeyEventProcessing(event);
    788 }
    789 
    790 void OmniboxViewViews::GetAccessibleState(ui::AXViewState* state) {
    791   location_bar_view_->GetAccessibleState(state);
    792   state->role = ui::AX_ROLE_TEXT_FIELD;
    793 }
    794 
    795 void OmniboxViewViews::OnFocus() {
    796   views::Textfield::OnFocus();
    797   // TODO(oshima): Get control key state.
    798   model()->OnSetFocus(false);
    799   // Don't call controller()->OnSetFocus, this view has already acquired focus.
    800 
    801   // Restore the selection we saved in OnBlur() if it's still valid.
    802   if (saved_selection_for_focus_change_.IsValid()) {
    803     SelectRange(saved_selection_for_focus_change_);
    804     saved_selection_for_focus_change_ = gfx::Range::InvalidRange();
    805   }
    806 }
    807 
    808 void OmniboxViewViews::OnBlur() {
    809   // Save the user's existing selection to restore it later.
    810   saved_selection_for_focus_change_ = GetSelectedRange();
    811 
    812   views::Textfield::OnBlur();
    813   gfx::NativeView native_view = NULL;
    814   views::Widget* widget = GetWidget();
    815   if (widget) {
    816     aura::client::FocusClient* client =
    817         aura::client::GetFocusClient(widget->GetNativeView());
    818     if (client)
    819       native_view = client->GetFocusedWindow();
    820   }
    821   model()->OnWillKillFocus(native_view);
    822   // Close the popup.
    823   CloseOmniboxPopup();
    824 
    825   // Tell the model to reset itself.
    826   model()->OnKillFocus();
    827 
    828   // Ignore loss of focus if we lost focus because the website settings popup
    829   // is open. When the popup is destroyed, focus will return to the Omnibox.
    830   if (!WebsiteSettingsPopupView::IsPopupShowing())
    831     OnDidKillFocus();
    832 
    833   // Make sure the beginning of the text is visible.
    834   SelectRange(gfx::Range(0));
    835 }
    836 
    837 bool OmniboxViewViews::IsCommandIdEnabled(int command_id) const {
    838   if (command_id == IDS_APP_PASTE)
    839     return !read_only() && !GetClipboardText().empty();
    840   if (command_id == IDS_PASTE_AND_GO)
    841     return !read_only() && model()->CanPasteAndGo(GetClipboardText());
    842   if (command_id == IDS_SHOW_URL)
    843     return controller()->GetToolbarModel()->WouldReplaceURL();
    844   return command_id == IDS_MOVE_DOWN || command_id == IDS_MOVE_UP ||
    845          Textfield::IsCommandIdEnabled(command_id) ||
    846          command_updater()->IsCommandEnabled(command_id);
    847 }
    848 
    849 base::string16 OmniboxViewViews::GetSelectionClipboardText() const {
    850   return SanitizeTextForPaste(Textfield::GetSelectionClipboardText());
    851 }
    852 
    853 #if defined(OS_CHROMEOS)
    854 void OmniboxViewViews::CandidateWindowOpened(
    855       chromeos::input_method::InputMethodManager* manager) {
    856   ime_candidate_window_open_ = true;
    857 }
    858 
    859 void OmniboxViewViews::CandidateWindowClosed(
    860       chromeos::input_method::InputMethodManager* manager) {
    861   ime_candidate_window_open_ = false;
    862 }
    863 #endif
    864 
    865 void OmniboxViewViews::ContentsChanged(views::Textfield* sender,
    866                                        const base::string16& new_contents) {
    867 }
    868 
    869 bool OmniboxViewViews::HandleKeyEvent(views::Textfield* textfield,
    870                                       const ui::KeyEvent& event) {
    871   delete_at_end_pressed_ = false;
    872 
    873   if (event.key_code() == ui::VKEY_BACK) {
    874     // No extra handling is needed in keyword search mode, if there is a
    875     // non-empty selection, or if the cursor is not leading the text.
    876     if (model()->is_keyword_hint() || model()->keyword().empty() ||
    877         HasSelection() || GetCursorPosition() != 0)
    878       return false;
    879     model()->ClearKeyword(text());
    880     return true;
    881   }
    882 
    883   if (event.key_code() == ui::VKEY_DELETE && !event.IsAltDown()) {
    884     delete_at_end_pressed_ =
    885         (!HasSelection() && GetCursorPosition() == text().length());
    886   }
    887 
    888   // Handle the right-arrow key for LTR text and the left-arrow key for RTL text
    889   // if there is gray text that needs to be committed.
    890   if (GetCursorPosition() == text().length()) {
    891     base::i18n::TextDirection direction = GetTextDirection();
    892     if ((direction == base::i18n::LEFT_TO_RIGHT &&
    893          event.key_code() == ui::VKEY_RIGHT) ||
    894         (direction == base::i18n::RIGHT_TO_LEFT &&
    895          event.key_code() == ui::VKEY_LEFT)) {
    896       return model()->CommitSuggestedText();
    897     }
    898   }
    899 
    900   return false;
    901 }
    902 
    903 void OmniboxViewViews::OnBeforeUserAction(views::Textfield* sender) {
    904   OnBeforePossibleChange();
    905 }
    906 
    907 void OmniboxViewViews::OnAfterUserAction(views::Textfield* sender) {
    908   OnAfterPossibleChange();
    909 }
    910 
    911 void OmniboxViewViews::OnAfterCutOrCopy(ui::ClipboardType clipboard_type) {
    912   ui::Clipboard* cb = ui::Clipboard::GetForCurrentThread();
    913   base::string16 selected_text;
    914   cb->ReadText(clipboard_type, &selected_text);
    915   GURL url;
    916   bool write_url;
    917   model()->AdjustTextForCopy(GetSelectedRange().GetMin(), IsSelectAll(),
    918                              &selected_text, &url, &write_url);
    919   if (IsSelectAll())
    920     UMA_HISTOGRAM_COUNTS(OmniboxEditModel::kCutOrCopyAllTextHistogram, 1);
    921 
    922   if (write_url) {
    923     BookmarkNodeData data;
    924     data.ReadFromTuple(url, selected_text);
    925     data.WriteToClipboard(clipboard_type);
    926   } else {
    927     ui::ScopedClipboardWriter scoped_clipboard_writer(
    928         ui::Clipboard::GetForCurrentThread(), clipboard_type);
    929     scoped_clipboard_writer.WriteText(selected_text);
    930   }
    931 }
    932 
    933 void OmniboxViewViews::OnWriteDragData(ui::OSExchangeData* data) {
    934   GURL url;
    935   bool write_url;
    936   bool is_all_selected = IsSelectAll();
    937   base::string16 selected_text = GetSelectedText();
    938   model()->AdjustTextForCopy(GetSelectedRange().GetMin(), is_all_selected,
    939                              &selected_text, &url, &write_url);
    940   data->SetString(selected_text);
    941   if (write_url) {
    942     gfx::Image favicon;
    943     base::string16 title = selected_text;
    944     if (is_all_selected)
    945       model()->GetDataForURLExport(&url, &title, &favicon);
    946     button_drag_utils::SetURLAndDragImage(url, title, favicon.AsImageSkia(),
    947                                           NULL, data, GetWidget());
    948     data->SetURL(url, title);
    949   }
    950 }
    951 
    952 void OmniboxViewViews::OnGetDragOperationsForTextfield(int* drag_operations) {
    953   base::string16 selected_text = GetSelectedText();
    954   GURL url;
    955   bool write_url;
    956   model()->AdjustTextForCopy(GetSelectedRange().GetMin(), IsSelectAll(),
    957                              &selected_text, &url, &write_url);
    958   if (write_url)
    959     *drag_operations |= ui::DragDropTypes::DRAG_LINK;
    960 }
    961 
    962 void OmniboxViewViews::AppendDropFormats(
    963     int* formats,
    964     std::set<ui::OSExchangeData::CustomFormat>* custom_formats) {
    965   *formats = *formats | ui::OSExchangeData::URL;
    966 }
    967 
    968 int OmniboxViewViews::OnDrop(const ui::OSExchangeData& data) {
    969   if (HasTextBeingDragged())
    970     return ui::DragDropTypes::DRAG_NONE;
    971 
    972   if (data.HasURL(ui::OSExchangeData::CONVERT_FILENAMES)) {
    973     GURL url;
    974     base::string16 title;
    975     if (data.GetURLAndTitle(
    976             ui::OSExchangeData::CONVERT_FILENAMES, &url, &title)) {
    977       base::string16 text(
    978           StripJavascriptSchemas(base::UTF8ToUTF16(url.spec())));
    979       if (model()->CanPasteAndGo(text)) {
    980         model()->PasteAndGo(text);
    981         return ui::DragDropTypes::DRAG_COPY;
    982       }
    983     }
    984   } else if (data.HasString()) {
    985     base::string16 text;
    986     if (data.GetString(&text)) {
    987       base::string16 collapsed_text(base::CollapseWhitespace(text, true));
    988       if (model()->CanPasteAndGo(collapsed_text))
    989         model()->PasteAndGo(collapsed_text);
    990       return ui::DragDropTypes::DRAG_COPY;
    991     }
    992   }
    993 
    994   return ui::DragDropTypes::DRAG_NONE;
    995 }
    996 
    997 void OmniboxViewViews::UpdateContextMenu(ui::SimpleMenuModel* menu_contents) {
    998   int paste_position = menu_contents->GetIndexOfCommandId(IDS_APP_PASTE);
    999   DCHECK_GE(paste_position, 0);
   1000   menu_contents->InsertItemWithStringIdAt(
   1001       paste_position + 1, IDS_PASTE_AND_GO, IDS_PASTE_AND_GO);
   1002 
   1003   menu_contents->AddSeparator(ui::NORMAL_SEPARATOR);
   1004 
   1005   if (chrome::IsQueryExtractionEnabled() || chrome::ShouldDisplayOriginChip()) {
   1006     int select_all_position = menu_contents->GetIndexOfCommandId(
   1007         IDS_APP_SELECT_ALL);
   1008     DCHECK_GE(select_all_position, 0);
   1009     menu_contents->InsertItemWithStringIdAt(
   1010         select_all_position + 1, IDS_SHOW_URL, IDS_SHOW_URL);
   1011   }
   1012 
   1013   // Minor note: We use IDC_ for command id here while the underlying textfield
   1014   // is using IDS_ for all its command ids. This is because views cannot depend
   1015   // on IDC_ for now.
   1016   menu_contents->AddItemWithStringId(IDC_EDIT_SEARCH_ENGINES,
   1017       IDS_EDIT_SEARCH_ENGINES);
   1018 }
   1019