root/chrome/browser/ui/gtk/omnibox/omnibox_view_gtk.cc

DEFINITIONS

1. GetUTF8Offset
2. SetEntryStyle
3. ClipboardSelectionCleared
4. GetPopupMenuIndexForStockLabel
5. font_baseline_shift_
6. Init
7. HandleHierarchyChanged
8. SetFocus
9. ApplyCaretVisibility
10. SaveStateToTab
11. OnTabChanged
12. Update
13. GetText
14. SetWindowTextAndCaretPos
15. SetForcedQuery
16. IsSelectAll
17. DeleteAtEndPressed
18. GetSelectionBounds
19. SelectAll
20. UpdatePopup
21. OnTemporaryTextMaybeChanged
22. OnInlineAutocompleteTextMaybeChanged
23. OnInlineAutocompleteTextCleared
24. OnRevertTemporaryText
25. OnBeforePossibleChange
26. OnAfterPossibleChange
27. GetNativeView
28. GetRelativeWindowForPopup
29. SetGrayTextAutocompletion
30. GetGrayTextAutocompletion
31. GetTextWidth
32. GetWidth
33. IsImeComposing
34. Observe
35. UpdateGrayTextViewColors
36. HandleBeginUserAction
37. HandleEndUserAction
38. HandleKeyPress
39. HandleKeyRelease
40. HandleViewButtonPress
41. HandleViewButtonRelease
42. HandleViewFocusIn
43. HandleViewFocusOut
44. HandleViewMoveCursor
45. HandleViewSizeRequest
46. HandlePopupMenuDeactivate
47. HandlePopulatePopup
48. HandlePasteAndGo
49. HandleEditSearchEngines
50. HandleShowURL
51. HandleMarkSet
52. HandleMarkSetAfter
53. HandleDragDataReceived
54. HandleDragDataGet
55. HandleDragBegin
56. HandleDragEnd
57. HandleInsertText
58. HandleBackSpace
59. HandleViewMoveFocus
60. HandleCopyClipboard
61. HandleCutClipboard
62. HandleCopyOrCutClipboard
63. GetOmniboxTextLength
64. EmphasizeURLComponents
65. OnPerformDropImpl
66. OnBrowserThemeChanged
67. GetFont
68. OwnPrimarySelection
69. HandlePasteClipboard
70. WindowBoundsFromIters
71. HandleExposeEvent
72. HandleExposeEventAfter
73. SelectAllInternal
74. StartUpdatingHighlightedText
75. FinishUpdatingHighlightedText
76. GetSelection
77. ItersFromCharRange
78. IsCaretAtEnd
79. SavePrimarySelection
80. SetTextAndSelectedRange
81. SetSelectedRange
82. AdjustTextJustification
83. GetContentDirection
84. HandleWidgetDirectionChanged
85. HandleDeleteFromCursor
86. HandleKeymapDirectionChanged
87. HandleDeleteRange
88. HandleMarkSetAlways
89. ClipboardGetSelectionThunk
90. ClipboardGetSelection
91. GetSelectedText
92. UpdatePrimarySelectionIfValidURL
93. HandlePreEditChanged
94. HandleWindowSetFocus
95. HandleUndoRedo
96. HandleUndoRedoAfter
97. GetTextBufferBounds
98. ValidateTextBufferIter
99. AdjustVerticalAlignmentOfGrayTextView

// Copyright 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/gtk/omnibox/omnibox_view_gtk.h"

#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>

#include <algorithm>

#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversion_utils.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/chrome_notification_types.h"
#include "chrome/browser/command_updater.h"
#include "chrome/browser/defaults.h"
#include "chrome/browser/platform_util.h"
#include "chrome/browser/search/search.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/gtk/gtk_theme_service.h"
#include "chrome/browser/ui/gtk/gtk_util.h"
#include "chrome/browser/ui/gtk/location_bar_view_gtk.h"
#include "chrome/browser/ui/gtk/omnibox/omnibox_popup_view_gtk.h"
#include "chrome/browser/ui/gtk/view_id_util.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/tabs/tab_strip_model.h"
#include "chrome/browser/ui/toolbar/toolbar_model.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/web_contents.h"
#include "extensions/common/constants.h"
#include "grit/generated_resources.h"
#include "net/base/escape.h"
#include "third_party/undoview/undo_view.h"
#include "ui/base/accelerators/menu_label_accelerator_util_linux.h"
#include "ui/base/dragdrop/drag_drop_types.h"
#include "ui/base/dragdrop/gtk_dnd_util.h"
#include "ui/base/gtk/gtk_hig_constants.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/color_utils.h"
#include "ui/gfx/font.h"
#include "ui/gfx/gtk_compat.h"
#include "ui/gfx/skia_utils_gtk.h"
#include "url/gurl.h"

using content::WebContents;

namespace {

const gchar* kOmniboxViewGtkKey = "__OMNIBOX_VIEW_GTK__";

const char kTextBaseColor[] = "#808080";
const char kSecureSchemeColor[] = "#079500";
const char kSecurityErrorSchemeColor[] = "#a20000";

const double kStrikethroughStrokeRed = 162.0 / 256.0;
const double kStrikethroughStrokeWidth = 2.0;

size_t GetUTF8Offset(const base::string16& text, size_t text_offset) {
  return base::UTF16ToUTF8(text.substr(0, text_offset)).size();
}

// Stores GTK+-specific state so it can be restored after switching tabs.
struct ViewState {
  explicit ViewState(const OmniboxViewGtk::CharRange& selection_range)
      : selection_range(selection_range) {
  }

  // Range of selected text.
  OmniboxViewGtk::CharRange selection_range;
};

const char kAutocompleteEditStateKey[] = "AutocompleteEditState";

struct AutocompleteEditState : public base::SupportsUserData::Data {
  AutocompleteEditState(const OmniboxEditModel::State& model_state,
                        const ViewState& view_state)
      : model_state(model_state),
        view_state(view_state) {
  }
  virtual ~AutocompleteEditState() {}

  const OmniboxEditModel::State model_state;
  const ViewState view_state;
};

// Set up style properties to override the default GtkTextView; if a theme has
// overridden some of these properties, an inner-line will be displayed inside
// the fake GtkTextEntry.
void SetEntryStyle() {
  static bool style_was_set = false;

  if (style_was_set)
    return;
  style_was_set = true;

  gtk_rc_parse_string(
      "style \"chrome-location-bar-entry\" {"
      "  xthickness = 0\n"
      "  ythickness = 0\n"
      "  GtkWidget::focus_padding = 0\n"
      "  GtkWidget::focus-line-width = 0\n"
      "  GtkWidget::interior_focus = 0\n"
      "  GtkWidget::internal-padding = 0\n"
      "  GtkContainer::border-width = 0\n"
      "}\n"
      "widget \"*chrome-location-bar-entry\" "
      "style \"chrome-location-bar-entry\"");
}

// Copied from GTK+. Called when we lose the primary selection. This will clear
// the selection in the text buffer.
void ClipboardSelectionCleared(GtkClipboard* clipboard,
                               gpointer data) {
  GtkTextIter insert;
  GtkTextIter selection_bound;
  GtkTextBuffer* buffer = GTK_TEXT_BUFFER(data);

  gtk_text_buffer_get_iter_at_mark(buffer, &insert,
                                   gtk_text_buffer_get_insert(buffer));
  gtk_text_buffer_get_iter_at_mark(buffer, &selection_bound,
                                   gtk_text_buffer_get_selection_bound(buffer));

  if (!gtk_text_iter_equal(&insert, &selection_bound)) {
    gtk_text_buffer_move_mark(buffer,
                              gtk_text_buffer_get_selection_bound(buffer),
                              &insert);
  }
}

// Returns the |menu| item whose label matches |label|.
guint GetPopupMenuIndexForStockLabel(const char* label, GtkMenu* menu) {
  GList* list = gtk_container_get_children(GTK_CONTAINER(menu));
  guint index = 1;
  for (GList* item = list; item != NULL; item = item->next, ++index) {
    if (GTK_IS_IMAGE_MENU_ITEM(item->data)) {
      gboolean is_stock = gtk_image_menu_item_get_use_stock(
          GTK_IMAGE_MENU_ITEM(item->data));
      if (is_stock) {
        std::string menu_item_label =
            gtk_menu_item_get_label(GTK_MENU_ITEM(item->data));
        if (menu_item_label == label)
          break;
      }
    }
  }
  g_list_free(list);
  return index;
}

}  // namespace

OmniboxViewGtk::OmniboxViewGtk(OmniboxEditController* controller,
                               Browser* browser,
                               Profile* profile,
                               CommandUpdater* command_updater,
                               bool popup_window_mode,
                               GtkWidget* location_bar)
    : OmniboxView(profile, controller, command_updater),
      browser_(browser),
      text_view_(NULL),
      tag_table_(NULL),
      text_buffer_(NULL),
      faded_text_tag_(NULL),
      secure_scheme_tag_(NULL),
      security_error_scheme_tag_(NULL),
      normal_text_tag_(NULL),
      gray_text_anchor_tag_(NULL),
      gray_text_view_(NULL),
      gray_text_mark_(NULL),
      popup_window_mode_(popup_window_mode),
      security_level_(ToolbarModel::NONE),
      mark_set_handler_id_(0),
      button_1_pressed_(false),
      theme_service_(GtkThemeService::GetFrom(profile)),
      enter_was_pressed_(false),
      tab_was_pressed_(false),
      paste_clipboard_requested_(false),
      enter_was_inserted_(false),
      selection_suggested_(false),
      delete_was_pressed_(false),
      delete_at_end_pressed_(false),
      handling_key_press_(false),
      content_maybe_changed_by_key_press_(false),
      update_popup_without_focus_(false),
      supports_pre_edit_(!gtk_check_version(2, 20, 0)),
      pre_edit_size_before_change_(0),
      going_to_focus_(NULL),
      font_baseline_shift_(0) {
  OmniboxPopupViewGtk* view = new OmniboxPopupViewGtk(
      GetFont(), this, model(), location_bar);
  view->Init();
  popup_view_.reset(view);
}

OmniboxViewGtk::~OmniboxViewGtk() {
  // 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();

  // We own our widget and TextView related objects.
  if (alignment_.get()) {  // Init() has been called.
    alignment_.Destroy();
    g_object_unref(text_buffer_);
    g_object_unref(tag_table_);
    // The tags we created are owned by the tag_table, and should be destroyed
    // along with it.  We don't hold our own reference to them.
  }
}

void OmniboxViewGtk::Init() {
  SetEntryStyle();

  alignment_.Own(gtk_alignment_new(0.0, 0.0, 1.0, 1.0));
  gtk_widget_set_name(alignment_.get(),
                      "chrome-autocomplete-edit-view");

  // The GtkTagTable and GtkTextBuffer are not initially unowned, so we have
  // our own reference when we create them, and we own them.  Adding them to
  // the other objects adds a reference; it doesn't adopt them.
  tag_table_ = gtk_text_tag_table_new();
  text_buffer_ = gtk_text_buffer_new(tag_table_);
  g_object_set_data(G_OBJECT(text_buffer_), kOmniboxViewGtkKey, this);

  // We need to run this two handlers before undo manager's handlers, so that
  // text iterators modified by these handlers can be passed down to undo
  // manager's handlers.
  g_signal_connect(text_buffer_, "delete-range",
                   G_CALLBACK(&HandleDeleteRangeThunk), this);
  g_signal_connect(text_buffer_, "mark-set",
                   G_CALLBACK(&HandleMarkSetAlwaysThunk), this);

  text_view_ = gtk_undo_view_new(text_buffer_);
  if (popup_window_mode_)
    gtk_text_view_set_editable(GTK_TEXT_VIEW(text_view_), false);

  // One pixel left margin is necessary to make the cursor visible when UI
  // language direction is LTR but |text_buffer_|'s content direction is RTL.
  gtk_text_view_set_left_margin(GTK_TEXT_VIEW(text_view_), 1);

  // See SetEntryStyle() comments.
  gtk_widget_set_name(text_view_, "chrome-location-bar-entry");

  // The text view was floating.  It will now be owned by the alignment.
  gtk_container_add(GTK_CONTAINER(alignment_.get()), text_view_);

  // Do not allow inserting tab characters when pressing Tab key, so that when
  // Tab key is pressed, |text_view_| will emit "move-focus" signal, which will
  // be intercepted by our own handler to trigger Tab to search feature when
  // necessary.
  gtk_text_view_set_accepts_tab(GTK_TEXT_VIEW(text_view_), FALSE);

  faded_text_tag_ = gtk_text_buffer_create_tag(text_buffer_,
      NULL, "foreground", kTextBaseColor, NULL);
  secure_scheme_tag_ = gtk_text_buffer_create_tag(text_buffer_,
      NULL, "foreground", kSecureSchemeColor, NULL);
  security_error_scheme_tag_ = gtk_text_buffer_create_tag(text_buffer_,
      NULL, "foreground", kSecurityErrorSchemeColor, NULL);
  normal_text_tag_ = gtk_text_buffer_create_tag(text_buffer_,
      NULL, "foreground", "#000000", NULL);

  // NOTE: This code used to connect to "changed", however this was fired too
  // often and during bad times (our own buffer changes?).  It works out much
  // better to listen to end-user-action, which should be fired whenever the
  // user makes some sort of change to the buffer.
  g_signal_connect(text_buffer_, "begin-user-action",
                   G_CALLBACK(&HandleBeginUserActionThunk), this);
  g_signal_connect(text_buffer_, "end-user-action",
                   G_CALLBACK(&HandleEndUserActionThunk), this);
  // We connect to key press and release for special handling of a few keys.
  g_signal_connect(text_view_, "key-press-event",
                   G_CALLBACK(&HandleKeyPressThunk), this);
  g_signal_connect(text_view_, "key-release-event",
                   G_CALLBACK(&HandleKeyReleaseThunk), this);
  g_signal_connect(text_view_, "button-press-event",
                   G_CALLBACK(&HandleViewButtonPressThunk), this);
  g_signal_connect(text_view_, "button-release-event",
                   G_CALLBACK(&HandleViewButtonReleaseThunk), this);
  g_signal_connect(text_view_, "focus-in-event",
                   G_CALLBACK(&HandleViewFocusInThunk), this);
  g_signal_connect(text_view_, "focus-out-event",
                   G_CALLBACK(&HandleViewFocusOutThunk), this);
  // NOTE: The GtkTextView documentation asks you not to connect to this
  // signal, but it is very convenient and clean for catching up/down.
  g_signal_connect(text_view_, "move-cursor",
                   G_CALLBACK(&HandleViewMoveCursorThunk), this);
  g_signal_connect(text_view_, "move-focus",
                   G_CALLBACK(&HandleViewMoveFocusThunk), this);
  // Override the size request.  We want to keep the original height request
  // from the widget, since that's font dependent.  We want to ignore the width
  // so we don't force a minimum width based on the text length.
  g_signal_connect(text_view_, "size-request",
                   G_CALLBACK(&HandleViewSizeRequestThunk), this);
  g_signal_connect(text_view_, "populate-popup",
                   G_CALLBACK(&HandlePopulatePopupThunk), this);
  mark_set_handler_id_ = g_signal_connect(
      text_buffer_, "mark-set", G_CALLBACK(&HandleMarkSetThunk), this);
  mark_set_handler_id2_ = g_signal_connect_after(
      text_buffer_, "mark-set", G_CALLBACK(&HandleMarkSetAfterThunk), this);
  g_signal_connect(text_view_, "drag-data-received",
                   G_CALLBACK(&HandleDragDataReceivedThunk), this);
  // Override the text_view_'s default drag-data-get handler by calling our own
  // version after the normal call has happened.
  g_signal_connect_after(text_view_, "drag-data-get",
                   G_CALLBACK(&HandleDragDataGetThunk), this);
  g_signal_connect_after(text_view_, "drag-begin",
                   G_CALLBACK(&HandleDragBeginThunk), this);
  g_signal_connect_after(text_view_, "drag-end",
                   G_CALLBACK(&HandleDragEndThunk), this);
  g_signal_connect(text_view_, "backspace",
                   G_CALLBACK(&HandleBackSpaceThunk), this);
  g_signal_connect(text_view_, "copy-clipboard",
                   G_CALLBACK(&HandleCopyClipboardThunk), this);
  g_signal_connect(text_view_, "cut-clipboard",
                   G_CALLBACK(&HandleCutClipboardThunk), this);
  g_signal_connect(text_view_, "paste-clipboard",
                   G_CALLBACK(&HandlePasteClipboardThunk), this);
  g_signal_connect(text_view_, "expose-event",
                   G_CALLBACK(&HandleExposeEventThunk), this);
  g_signal_connect_after(text_view_, "expose-event",
                         G_CALLBACK(&HandleExposeEventAfterThunk), this);
  g_signal_connect(text_view_, "direction-changed",
                   G_CALLBACK(&HandleWidgetDirectionChangedThunk), this);
  g_signal_connect(text_view_, "delete-from-cursor",
                   G_CALLBACK(&HandleDeleteFromCursorThunk), this);
  g_signal_connect(text_view_, "hierarchy-changed",
                   G_CALLBACK(&HandleHierarchyChangedThunk), this);
  if (supports_pre_edit_) {
    g_signal_connect(text_view_, "preedit-changed",
                     G_CALLBACK(&HandlePreEditChangedThunk), this);
  }
  g_signal_connect(text_view_, "undo", G_CALLBACK(&HandleUndoRedoThunk), this);
  g_signal_connect(text_view_, "redo", G_CALLBACK(&HandleUndoRedoThunk), this);
  g_signal_connect_after(text_view_, "undo",
                         G_CALLBACK(&HandleUndoRedoAfterThunk), this);
  g_signal_connect_after(text_view_, "redo",
                         G_CALLBACK(&HandleUndoRedoAfterThunk), this);
  g_signal_connect(text_view_, "destroy",
                   G_CALLBACK(&gtk_widget_destroyed), &text_view_);

  // Setup for the gray suggestion text view.
  // GtkLabel is used instead of GtkTextView to get transparent background.
  gray_text_view_ = gtk_label_new(NULL);
  gtk_widget_set_no_show_all(gray_text_view_, TRUE);
  gtk_label_set_selectable(GTK_LABEL(gray_text_view_), TRUE);

  GtkTextIter end_iter;
  gtk_text_buffer_get_end_iter(text_buffer_, &end_iter);

  // Insert a Zero Width Space character just before the gray text anchor.
  // It's a hack to workaround a bug of GtkTextView which can not align the
  // pre-edit string and a child anchor correctly when there is no other content
  // around the pre-edit string.
  gtk_text_buffer_insert(text_buffer_, &end_iter, "\342\200\213", -1);
  GtkTextChildAnchor* gray_text_anchor =
      gtk_text_buffer_create_child_anchor(text_buffer_, &end_iter);

  gtk_text_view_add_child_at_anchor(GTK_TEXT_VIEW(text_view_),
                                    gray_text_view_,
                                    gray_text_anchor);

  gray_text_anchor_tag_ = gtk_text_buffer_create_tag(text_buffer_, NULL, NULL);

  GtkTextIter anchor_iter;
  gtk_text_buffer_get_iter_at_child_anchor(text_buffer_, &anchor_iter,
                                           gray_text_anchor);
  gtk_text_buffer_apply_tag(text_buffer_, gray_text_anchor_tag_,
                            &anchor_iter, &end_iter);

  GtkTextIter start_iter;
  gtk_text_buffer_get_start_iter(text_buffer_, &start_iter);
  gray_text_mark_ =
      gtk_text_buffer_create_mark(text_buffer_, NULL, &start_iter, FALSE);

  // Hooking up this handler after setting up above hacks for gray text view, so
  // that we won't filter out the special ZWP mark itself.
  g_signal_connect(text_buffer_, "insert-text",
                   G_CALLBACK(&HandleInsertTextThunk), this);

  AdjustVerticalAlignmentOfGrayTextView();

  registrar_.Add(this,
                 chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
                 content::Source<ThemeService>(theme_service_));
  theme_service_->InitThemesFor(this);

  ViewIDUtil::SetID(GetNativeView(), VIEW_ID_OMNIBOX);
}

void OmniboxViewGtk::HandleHierarchyChanged(GtkWidget* sender,
                                            GtkWidget* old_toplevel) {
  GtkWindow* new_toplevel = platform_util::GetTopLevel(sender);
  if (!new_toplevel)
    return;

  // Use |signals_| to make sure we don't get called back after destruction.
  signals_.Connect(new_toplevel, "set-focus",
                   G_CALLBACK(&HandleWindowSetFocusThunk), this);
}

void OmniboxViewGtk::SetFocus() {
  DCHECK(text_view_);
  gtk_widget_grab_focus(text_view_);
  // 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 OmniboxViewGtk::ApplyCaretVisibility() {
  gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(text_view_),
                                   model()->is_caret_visible());
}

void OmniboxViewGtk::SaveStateToTab(WebContents* tab) {
  DCHECK(tab);
  // If any text has been selected, register it as the PRIMARY selection so it
  // can still be pasted via middle-click after the text view is cleared.
  if (!selected_text_.empty())
    SavePrimarySelection(selected_text_);
  // NOTE: GetStateForTabSwitch may affect GetSelection, so order is important.
  OmniboxEditModel::State model_state = model()->GetStateForTabSwitch();
  tab->SetUserData(
      kAutocompleteEditStateKey,
      new AutocompleteEditState(model_state, ViewState(GetSelection())));
}

void OmniboxViewGtk::OnTabChanged(const WebContents* web_contents) {
  security_level_ = controller()->GetToolbarModel()->GetSecurityLevel(false);
  selected_text_.clear();

  const AutocompleteEditState* state = static_cast<AutocompleteEditState*>(
      web_contents->GetUserData(&kAutocompleteEditStateKey));
  model()->RestoreState(state ? &state->model_state : NULL);
  if (state) {
    // Move the marks for the cursor and the other end of the selection to the
    // previously-saved offsets (but preserve PRIMARY).
    StartUpdatingHighlightedText();
    SetSelectedRange(state->view_state.selection_range);
    FinishUpdatingHighlightedText();
  }
}

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

    RevertAll();
  } else if (old_security_level != security_level_) {
    EmphasizeURLComponents();
  }
}

base::string16 OmniboxViewGtk::GetText() const {
  GtkTextIter start, end;
  GetTextBufferBounds(&start, &end);
  gchar* utf8 = gtk_text_buffer_get_text(text_buffer_, &start, &end, false);
  base::string16 out(base::UTF8ToUTF16(utf8));
  g_free(utf8);

  if (supports_pre_edit_) {
    // We need to treat the text currently being composed by the input method
    // as part of the text content, so that omnibox can work correctly in the
    // middle of composition.
    if (pre_edit_.size()) {
      GtkTextMark* mark = gtk_text_buffer_get_insert(text_buffer_);
      gtk_text_buffer_get_iter_at_mark(text_buffer_, &start, mark);
      out.insert(gtk_text_iter_get_offset(&start), pre_edit_);
    }
  }
  return out;
}

void OmniboxViewGtk::SetWindowTextAndCaretPos(const base::string16& text,
                                              size_t caret_pos,
                                              bool update_popup,
                                              bool notify_text_changed) {
  CharRange range(static_cast<int>(caret_pos), static_cast<int>(caret_pos));
  SetTextAndSelectedRange(text, range);

  if (update_popup)
    UpdatePopup();

  if (notify_text_changed)
    TextChanged();
}

void OmniboxViewGtk::SetForcedQuery() {
  const base::string16 current_text(GetText());
  const size_t start = current_text.find_first_not_of(base::kWhitespaceUTF16);
  if (start == base::string16::npos || (current_text[start] != '?')) {
    SetUserText(base::ASCIIToUTF16("?"));
  } else {
    StartUpdatingHighlightedText();
    SetSelectedRange(CharRange(current_text.size(), start + 1));
    FinishUpdatingHighlightedText();
  }
}

bool OmniboxViewGtk::IsSelectAll() const {
  GtkTextIter sel_start, sel_end;
  gtk_text_buffer_get_selection_bounds(text_buffer_, &sel_start, &sel_end);

  GtkTextIter start, end;
  GetTextBufferBounds(&start, &end);

  // Returns true if the |text_buffer_| is empty.
  return gtk_text_iter_equal(&start, &sel_start) &&
      gtk_text_iter_equal(&end, &sel_end);
}

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

void OmniboxViewGtk::GetSelectionBounds(base::string16::size_type* start,
                                        base::string16::size_type* end) const {
  CharRange selection = GetSelection();
  *start = static_cast<size_t>(selection.cp_min);
  *end = static_cast<size_t>(selection.cp_max);
}

void OmniboxViewGtk::SelectAll(bool reversed) {
  // SelectAll() is invoked as a side effect of other actions (e.g.  switching
  // tabs or hitting Escape) in autocomplete_edit.cc, so we don't update the
  // PRIMARY selection here.
  SelectAllInternal(reversed, false);
}

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

  // Don't inline autocomplete when the caret/selection isn't at the end of
  // the text, or in the middle of composition.
  CharRange sel = GetSelection();
  bool no_inline_autocomplete =
      std::max(sel.cp_max, sel.cp_min) < GetOmniboxTextLength() ||
      IsImeComposing();
  model()->StartAutocomplete(sel.cp_min != sel.cp_max, no_inline_autocomplete);
}

void OmniboxViewGtk::OnTemporaryTextMaybeChanged(
    const base::string16& display_text,
    bool save_original_selection,
    bool notify_text_changed) {
  if (save_original_selection)
    saved_temporary_selection_ = GetSelection();

  StartUpdatingHighlightedText();
  SetWindowTextAndCaretPos(display_text, display_text.length(), false, false);
  FinishUpdatingHighlightedText();
  if (notify_text_changed)
    TextChanged();
}

bool OmniboxViewGtk::OnInlineAutocompleteTextMaybeChanged(
    const base::string16& display_text,
    size_t user_text_length) {
  if (display_text == GetText())
    return false;

  StartUpdatingHighlightedText();
  CharRange range(display_text.size(), user_text_length);
  SetTextAndSelectedRange(display_text, range);
  FinishUpdatingHighlightedText();
  TextChanged();
  return true;
}

void OmniboxViewGtk::OnInlineAutocompleteTextCleared() {
}

void OmniboxViewGtk::OnRevertTemporaryText() {
  StartUpdatingHighlightedText();
  SetSelectedRange(saved_temporary_selection_);
  FinishUpdatingHighlightedText();
  // 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 OmniboxViewGtk::OnBeforePossibleChange() {
  // Record this paste, so we can do different behavior.
  if (paste_clipboard_requested_) {
    paste_clipboard_requested_ = false;
    model()->OnPaste();
  }

  // This method will be called in HandleKeyPress() method just before
  // handling a key press event. So we should prevent it from being called
  // when handling the key press event.
  if (handling_key_press_)
    return;

  // Record our state.
  text_before_change_ = GetText();
  sel_before_change_ = GetSelection();
  if (supports_pre_edit_)
    pre_edit_size_before_change_ = pre_edit_.size();
}

// TODO(deanm): This is mostly stolen from Windows, and will need some work.
bool OmniboxViewGtk::OnAfterPossibleChange() {
  // This method will be called in HandleKeyPress() method just after
  // handling a key press event. So we should prevent it from being called
  // when handling the key press event.
  if (handling_key_press_) {
    content_maybe_changed_by_key_press_ = true;
    return false;
  }

  // If the change is caused by an Enter key press event, and the event was not
  // handled by IME, then it's an unexpected change and shall be reverted here.
  // {Start|Finish}UpdatingHighlightedText() are called here to prevent the
  // PRIMARY selection from being changed.
  if (enter_was_pressed_ && enter_was_inserted_) {
    StartUpdatingHighlightedText();
    SetTextAndSelectedRange(text_before_change_, sel_before_change_);
    FinishUpdatingHighlightedText();
    return false;
  }

  const CharRange new_sel = GetSelection();
  const int length = GetOmniboxTextLength();
  const bool selection_differs =
      ((new_sel.cp_min != new_sel.cp_max) ||
       (sel_before_change_.cp_min != sel_before_change_.cp_max)) &&
      ((new_sel.cp_min != sel_before_change_.cp_min) ||
       (new_sel.cp_max != sel_before_change_.cp_max));
  const bool at_end_of_edit =
      (new_sel.cp_min == length && new_sel.cp_max == length);

  // See if the text or selection have changed since OnBeforePossibleChange().
  const base::string16 new_text(GetText());
  text_changed_ = (new_text != text_before_change_) || (supports_pre_edit_ &&
      (pre_edit_.size() != pre_edit_size_before_change_));

  if (text_changed_)
    AdjustTextJustification();

  // 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.cp_min <= std::min(sel_before_change_.cp_min,
                                 sel_before_change_.cp_max));

  delete_at_end_pressed_ = false;

  const bool something_changed = model()->OnAfterPossibleChange(
      text_before_change_, new_text, new_sel.selection_min(),
      new_sel.selection_max(), selection_differs, text_changed_,
      just_deleted_text, !IsImeComposing());

  // If only selection was changed, we don't need to call the controller'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_was_pressed_ && at_end_of_edit) {
    delete_at_end_pressed_ = true;
    model()->OnChanged();
  }
  delete_was_pressed_ = false;

  return something_changed;
}

gfx::NativeView OmniboxViewGtk::GetNativeView() const {
  return alignment_.get();
}

gfx::NativeView OmniboxViewGtk::GetRelativeWindowForPopup() const {
  GtkWidget* toplevel = gtk_widget_get_toplevel(GetNativeView());
  DCHECK(gtk_widget_is_toplevel(toplevel));
  return toplevel;
}

void OmniboxViewGtk::SetGrayTextAutocompletion(
    const base::string16& suggestion) {
  std::string suggestion_utf8 = base::UTF16ToUTF8(suggestion);

  gtk_label_set_text(GTK_LABEL(gray_text_view_), suggestion_utf8.c_str());

  if (suggestion.empty()) {
    gtk_widget_hide(gray_text_view_);
    return;
  }

  gtk_widget_show(gray_text_view_);
  AdjustVerticalAlignmentOfGrayTextView();
  UpdateGrayTextViewColors();
}

base::string16 OmniboxViewGtk::GetGrayTextAutocompletion() const {
  const gchar* suggestion = gtk_label_get_text(GTK_LABEL(gray_text_view_));
  return suggestion ? base::UTF8ToUTF16(suggestion) : base::string16();
}

int OmniboxViewGtk::GetTextWidth() const {
  // TextWidth may be called after gtk widget tree is destroyed but
  // before OmniboxViewGtk gets deleted.  This is a safe guard
  // to avoid accessing |text_view_| that has already been destroyed.
  // See crbug.com/70192.
  if (!text_view_)
    return 0;

  int horizontal_border_size =
      gtk_text_view_get_border_window_size(GTK_TEXT_VIEW(text_view_),
                                           GTK_TEXT_WINDOW_LEFT) +
      gtk_text_view_get_border_window_size(GTK_TEXT_VIEW(text_view_),
                                           GTK_TEXT_WINDOW_RIGHT) +
      gtk_text_view_get_left_margin(GTK_TEXT_VIEW(text_view_)) +
      gtk_text_view_get_right_margin(GTK_TEXT_VIEW(text_view_));

  GtkTextIter start, end;
  GdkRectangle first_char_bounds, last_char_bounds;
  gtk_text_buffer_get_start_iter(text_buffer_, &start);

  // Use the real end iterator here to take the width of gray suggestion text
  // into account, so that location bar can layout its children correctly.
  gtk_text_buffer_get_end_iter(text_buffer_, &end);
  gtk_text_view_get_iter_location(GTK_TEXT_VIEW(text_view_),
                                  &start, &first_char_bounds);
  gtk_text_view_get_iter_location(GTK_TEXT_VIEW(text_view_),
                                  &end, &last_char_bounds);

  gint first_char_start = first_char_bounds.x;
  gint first_char_end = first_char_start + first_char_bounds.width;
  gint last_char_start = last_char_bounds.x;
  gint last_char_end = last_char_start + last_char_bounds.width;

  // bounds width could be negative for RTL text.
  if (first_char_start > first_char_end)
    std::swap(first_char_start, first_char_end);
  if (last_char_start > last_char_end)
    std::swap(last_char_start, last_char_end);

  gint text_width = first_char_start < last_char_start ?
      last_char_end - first_char_start : first_char_end - last_char_start;

  return text_width + horizontal_border_size;
}

int OmniboxViewGtk::GetWidth() const {
  GtkAllocation allocation;
  gtk_widget_get_allocation(text_view_, &allocation);
  return allocation.width;
}

bool OmniboxViewGtk::IsImeComposing() const {
  return supports_pre_edit_ && !pre_edit_.empty();
}

void OmniboxViewGtk::Observe(int type,
                             const content::NotificationSource& source,
                             const content::NotificationDetails& details) {
  DCHECK(type == chrome::NOTIFICATION_BROWSER_THEME_CHANGED);

  OnBrowserThemeChanged();
}

void OmniboxViewGtk::UpdateGrayTextViewColors() {
  GdkColor faded_text;
  if (theme_service_->UsingNativeTheme()) {
    GtkStyle* style = gtk_rc_get_style(gray_text_view_);
    faded_text = gtk_util::AverageColors(
        style->text[GTK_STATE_NORMAL], style->base[GTK_STATE_NORMAL]);
  } else {
    gdk_color_parse(kTextBaseColor, &faded_text);
  }
  gtk_widget_modify_fg(gray_text_view_, GTK_STATE_NORMAL, &faded_text);
}

void OmniboxViewGtk::HandleBeginUserAction(GtkTextBuffer* sender) {
  OnBeforePossibleChange();
}

void OmniboxViewGtk::HandleEndUserAction(GtkTextBuffer* sender) {
  OnAfterPossibleChange();
}

gboolean OmniboxViewGtk::HandleKeyPress(GtkWidget* widget, GdkEventKey* event) {
  // Background of this piece of complicated code:
  // The omnibox supports several special behaviors which may be triggered by
  // certain key events:
  // Tab to search - triggered by Tab key
  // Accept input - triggered by Enter key
  // Revert input - triggered by Escape key
  //
  // Because we use a GtkTextView object |text_view_| for text input, we need
  // send all key events to |text_view_| before handling them, to make sure
  // IME works without any problem. So here, we intercept "key-press-event"
  // signal of |text_view_| object and call its default handler to handle the
  // key event first.
  //
  // Then if the key event is one of Tab, Enter and Escape, we need to trigger
  // the corresponding special behavior if IME did not handle it.
  // For Escape key, if the default signal handler returns FALSE, then we know
  // it's not handled by IME.
  //
  // For Tab key, as "accepts-tab" property of |text_view_| is set to FALSE,
  // if IME did not handle it then "move-focus" signal will be emitted by the
  // default signal handler of |text_view_|. So we can intercept "move-focus"
  // signal of |text_view_| to know if a Tab key press event was handled by IME,
  // and trigger Tab to search or result traversal behavior when necessary in
  // the signal handler.
  //
  // But for Enter key, if IME did not handle the key event, the default signal
  // handler will delete current selection range and insert '\n' and always
  // return TRUE. We need to prevent |text_view_| from performing this default
  // action if IME did not handle the key event, because we don't want the
  // content of omnibox to be changed before triggering our special behavior.
  // Otherwise our special behavior would not be performed correctly.
  //
  // But there is no way for us to prevent GtkTextView from handling the key
  // event and performing built-in operation. So in order to achieve our goal,
  // "insert-text" signal of |text_buffer_| object is intercepted, and
  // following actions are done in the signal handler:
  // - If there is only one character in inserted text, and it's '\n' or '\r',
  //   then set |enter_was_inserted_| to true.
  // - Filter out all new line and tab characters.
  //
  // So if |enter_was_inserted_| is true after calling |text_view_|'s default
  // signal handler against an Enter key press event, then we know that the
  // Enter key press event was handled by GtkTextView rather than IME, and can
  // perform the special behavior for Enter key safely.
  //
  // Now the last thing is to prevent the content of omnibox from being changed
  // by GtkTextView when Enter key is pressed. As OnBeforePossibleChange() and
  // OnAfterPossibleChange() will be called by GtkTextView before and after
  // changing the content, and the content is already saved in
  // OnBeforePossibleChange(), so if the Enter key press event was not handled
  // by IME, it's easy to restore the content in OnAfterPossibleChange(), as if
  // it's not changed at all.

  GtkWidgetClass* klass = GTK_WIDGET_GET_CLASS(widget);

  enter_was_pressed_ = event->keyval == GDK_Return ||
                       event->keyval == GDK_ISO_Enter ||
                       event->keyval == GDK_KP_Enter;

  // Set |tab_was_pressed_| to true if it's a Tab key press event, so that our
  // handler of "move-focus" signal can trigger Tab to search behavior when
  // necessary.
  tab_was_pressed_ = (event->keyval == GDK_Tab ||
                      event->keyval == GDK_ISO_Left_Tab ||
                      event->keyval == GDK_KP_Tab) &&
                     !(event->state & GDK_CONTROL_MASK);

  shift_was_pressed_ = event->state & GDK_SHIFT_MASK;

  delete_was_pressed_ = event->keyval == GDK_Delete ||
                        event->keyval == GDK_KP_Delete;

  // Reset |enter_was_inserted_|, which may be set in the "insert-text" signal
  // handler, so that we'll know if an Enter key event was handled by IME.
  enter_was_inserted_ = false;

  // Reset |paste_clipboard_requested_| to make sure we won't misinterpret this
  // key input action as a paste action.
  paste_clipboard_requested_ = false;

  // Reset |text_changed_| before passing the key event on to the text view.
  text_changed_ = false;

  OnBeforePossibleChange();
  handling_key_press_ = true;
  content_maybe_changed_by_key_press_ = false;

  // Call the default handler, so that IME can work as normal.
  // New line characters will be filtered out by our "insert-text"
  // signal handler attached to |text_buffer_| object.
  gboolean result = klass->key_press_event(widget, event);

  handling_key_press_ = false;
  if (content_maybe_changed_by_key_press_)
    OnAfterPossibleChange();

  // Set |tab_was_pressed_| to false, to make sure Tab to search behavior can
  // only be triggered by pressing Tab key.
  tab_was_pressed_ = false;

  if (enter_was_pressed_ && enter_was_inserted_) {
    bool alt_held = (event->state & GDK_MOD1_MASK);
    model()->AcceptInput(alt_held ? NEW_FOREGROUND_TAB : CURRENT_TAB, false);
    result = TRUE;
  } else if (!result && event->keyval == GDK_Escape &&
             (event->state & gtk_accelerator_get_default_mod_mask()) == 0) {
    // We can handle the Escape key if |text_view_| did not handle it.
    // If it's not handled by us, then we need to propagate it up to the parent
    // widgets, so that Escape accelerator can still work.
    result = model()->OnEscapeKeyPressed();
  } else if (event->keyval == GDK_Control_L || event->keyval == GDK_Control_R) {
    // Omnibox2 can switch its contents while pressing a control key. To switch
    // the contents of omnibox2, we notify the OmniboxEditModel class when the
    // control-key state is changed.
    model()->OnControlKeyChanged(true);
  } else if (!text_changed_ && event->keyval == GDK_Delete &&
             event->state & GDK_SHIFT_MASK) {
    // If shift+del didn't change the text, we let this delete an entry from
    // the popup.  We can't check to see if the IME handled it because even if
    // nothing is selected, the IME or the TextView still report handling it.
    if (model()->popup_model()->IsOpen())
      model()->popup_model()->TryDeletingCurrentItem();
  }

  // Set |enter_was_pressed_| to false, to make sure OnAfterPossibleChange() can
  // act as normal for changes made by other events.
  enter_was_pressed_ = false;

  // If the key event is not handled by |text_view_| or us, then we need to
  // propagate the key event up to parent widgets by returning FALSE.
  // In this case we need to stop the signal emission explicitly to prevent the
  // default "key-press-event" handler of |text_view_| from being called again.
  if (!result) {
    static guint signal_id =
        g_signal_lookup("key-press-event", GTK_TYPE_WIDGET);
    g_signal_stop_emission(widget, signal_id, 0);
  }

  return result;
}

gboolean OmniboxViewGtk::HandleKeyRelease(GtkWidget* widget,
                                          GdkEventKey* event) {
  // Omnibox2 can switch its contents while pressing a control key. To switch
  // the contents of omnibox2, we notify the OmniboxEditModel class when the
  // control-key state is changed.
  if (event->keyval == GDK_Control_L || event->keyval == GDK_Control_R) {
    // Round trip to query the control state after the release.  This allows
    // you to release one control key while still holding another control key.
    GdkDisplay* display = gdk_window_get_display(event->window);
    GdkModifierType mod;
    gdk_display_get_pointer(display, NULL, NULL, NULL, &mod);
    if (!(mod & GDK_CONTROL_MASK))
      model()->OnControlKeyChanged(false);
  }

  // Even though we handled the press ourselves, let GtkTextView handle the
  // release.  It shouldn't do anything particularly interesting, but it will
  // handle the IME work for us.
  return FALSE;  // Propagate into GtkTextView.
}

gboolean OmniboxViewGtk::HandleViewButtonPress(GtkWidget* sender,
                                               GdkEventButton* event) {
  // We don't need to care about double and triple clicks.
  if (event->type != GDK_BUTTON_PRESS)
    return FALSE;

  DCHECK(text_view_);

  // 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 (event->button == 1 || event->button == 2)
    model()->SetCaretVisibility(true);

  if (event->button == 1) {
    button_1_pressed_ = true;

    // Button press event may change the selection, we need to record the change
    // and report it to model() later when button is released.
    OnBeforePossibleChange();
  } else if (event->button == 2) {
    // GtkTextView pastes PRIMARY selection with middle click.
    // We can't call model()->on_paste_replacing_all() here, because the actual
    // paste clipboard action may not be performed if the clipboard is empty.
    paste_clipboard_requested_ = true;
  }
  return FALSE;
}

gboolean OmniboxViewGtk::HandleViewButtonRelease(GtkWidget* sender,
                                                 GdkEventButton* event) {
  if (event->button != 1)
    return FALSE;

  bool button_1_was_pressed = button_1_pressed_;
  button_1_pressed_ = false;

  DCHECK(text_view_);

  // Call the GtkTextView default handler, ignoring the fact that it will
  // likely have told us to stop propagating.  We want to handle selection.
  GtkWidgetClass* klass = GTK_WIDGET_GET_CLASS(text_view_);
  klass->button_release_event(text_view_, event);

  // Inform model() about possible text selection change. We may get a button
  // release with no press (e.g. if the user clicks in the omnibox to dismiss a
  // bubble).
  if (button_1_was_pressed)
    OnAfterPossibleChange();

  return TRUE;  // Don't continue, we called the default handler already.
}

gboolean OmniboxViewGtk::HandleViewFocusIn(GtkWidget* sender,
                                           GdkEventFocus* event) {
  DCHECK(text_view_);
  update_popup_without_focus_ = false;

  GdkModifierType modifiers;
  GdkWindow* gdk_window = gtk_widget_get_window(text_view_);
  gdk_window_get_pointer(gdk_window, NULL, NULL, &modifiers);
  model()->OnSetFocus((modifiers & GDK_CONTROL_MASK) != 0);
  controller()->OnSetFocus();
  // TODO(deanm): Some keyword hit business, etc here.

  g_signal_connect(
      gdk_keymap_get_for_display(gtk_widget_get_display(text_view_)),
      "direction-changed",
      G_CALLBACK(&HandleKeymapDirectionChangedThunk), this);

  AdjustTextJustification();

  return FALSE;  // Continue propagation.
}

gboolean OmniboxViewGtk::HandleViewFocusOut(GtkWidget* sender,
                                            GdkEventFocus* event) {
  DCHECK(text_view_);
  GtkWidget* view_getting_focus = NULL;
  GtkWindow* toplevel = platform_util::GetTopLevel(sender);
  if (gtk_window_is_active(toplevel))
    view_getting_focus = going_to_focus_;

  // This must be invoked before ClosePopup.
  model()->OnWillKillFocus(view_getting_focus);

  // Close the popup.
  CloseOmniboxPopup();
  // Tell the model to reset itself.
  model()->OnKillFocus();

  g_signal_handlers_disconnect_by_func(
      gdk_keymap_get_for_display(gtk_widget_get_display(text_view_)),
      reinterpret_cast<gpointer>(&HandleKeymapDirectionChangedThunk), this);

  return FALSE;  // Pass the event on to the GtkTextView.
}

void OmniboxViewGtk::HandleViewMoveCursor(
    GtkWidget* sender,
    GtkMovementStep step,
    gint count,
    gboolean extend_selection) {
  DCHECK(text_view_);
  GtkTextIter sel_start, sel_end;
  gboolean has_selection =
      gtk_text_buffer_get_selection_bounds(text_buffer_, &sel_start, &sel_end);
  bool handled = false;

  if (step == GTK_MOVEMENT_VISUAL_POSITIONS && !extend_selection &&
      (count == 1 || count == -1)) {
    // We need to take the content direction into account when handling cursor
    // movement, because the behavior of Left and Right key will be inverted if
    // the direction is RTL. Although we should check the direction around the
    // input caret, it's much simpler and good enough to check whole content's
    // direction.
    PangoDirection content_dir = GetContentDirection();
    gint count_towards_end = content_dir == PANGO_DIRECTION_RTL ? -1 : 1;

    // We want the GtkEntry behavior when you move the cursor while you have a
    // selection.  GtkTextView just drops the selection and moves the cursor,
    // but instead we want to move the cursor to the appropiate end of the
    // selection.
    if (has_selection) {
      // We have a selection and start / end are in ascending order.
      // Cursor placement will remove the selection, so we need inform
      // model() about this change by
      // calling On{Before|After}PossibleChange() methods.
      OnBeforePossibleChange();
      gtk_text_buffer_place_cursor(
          text_buffer_, count == count_towards_end ? &sel_end : &sel_start);
      OnAfterPossibleChange();
      handled = true;
    } else if (count == count_towards_end && !IsCaretAtEnd()) {
      handled = model()->CommitSuggestedText();
    }
  } else if (step == GTK_MOVEMENT_PAGES) {  // Page up and down.
    // Multiply by count for the direction (if we move too much that's ok).
    model()->OnUpOrDownKeyPressed(model()->result().size() * count);
    handled = true;
  } else if (step == GTK_MOVEMENT_DISPLAY_LINES) {  // Arrow up and down.
    model()->OnUpOrDownKeyPressed(count);
    handled = true;
  }

  if (!handled) {
    // Cursor movement may change the selection, we need to record the change
    // and report it to model().
    if (has_selection || extend_selection)
      OnBeforePossibleChange();

    // Propagate into GtkTextView
    GtkTextViewClass* klass = GTK_TEXT_VIEW_GET_CLASS(text_view_);
    klass->move_cursor(GTK_TEXT_VIEW(text_view_), step, count,
                       extend_selection);

    if (has_selection || extend_selection)
      OnAfterPossibleChange();
  }

  // move-cursor doesn't use a signal accumulator on the return value (it
  // just ignores then), so we have to stop the propagation.
  static guint signal_id = g_signal_lookup("move-cursor", GTK_TYPE_TEXT_VIEW);
  g_signal_stop_emission(text_view_, signal_id, 0);
}

void OmniboxViewGtk::HandleViewSizeRequest(GtkWidget* sender,
                                           GtkRequisition* req) {
  // Don't force a minimum width, but use the font-relative height.  This is a
  // run-first handler, so the default handler was already called.
  req->width = 1;
}

void OmniboxViewGtk::HandlePopupMenuDeactivate(GtkWidget* sender) {
  // When the context menu appears, |text_view_|'s focus is lost. After an item
  // is activated, the focus comes back to |text_view_|, but only after the
  // check in UpdatePopup(). We set this flag to make UpdatePopup() aware that
  // it will be receiving focus again.
  if (!model()->has_focus())
    update_popup_without_focus_ = true;
}

void OmniboxViewGtk::HandlePopulatePopup(GtkWidget* sender, GtkMenu* menu) {
  GtkWidget* separator = gtk_separator_menu_item_new();
  gtk_menu_shell_append(GTK_MENU_SHELL(menu), separator);
  gtk_widget_show(separator);

  // Paste and Go menu item.
  GtkClipboard* x_clipboard = gtk_clipboard_get(GDK_SELECTION_CLIPBOARD);
  gchar* text = gtk_clipboard_wait_for_text(x_clipboard);
  sanitized_text_for_paste_and_go_ = text ?
      StripJavascriptSchemas(
          base::CollapseWhitespace(base::UTF8ToUTF16(text), true)) :
      base::string16();
  g_free(text);
  GtkWidget* paste_and_go_menuitem = gtk_menu_item_new_with_mnemonic(
      ui::ConvertAcceleratorsFromWindowsStyle(l10n_util::GetStringUTF8(
          model()->IsPasteAndSearch(sanitized_text_for_paste_and_go_) ?
              IDS_PASTE_AND_SEARCH : IDS_PASTE_AND_GO)).c_str());
  // Detect the stock Paste menu item by searching for the stock label
  // GTK_STOCK_PASTE.  If we don't find it, the Paste and Go item will be
  // appended at the end of the popup menu.
  gtk_menu_shell_insert(GTK_MENU_SHELL(menu), paste_and_go_menuitem,
                        GetPopupMenuIndexForStockLabel(GTK_STOCK_PASTE, menu));
  g_signal_connect(paste_and_go_menuitem, "activate",
                   G_CALLBACK(HandlePasteAndGoThunk), this);
  gtk_widget_set_sensitive(
      paste_and_go_menuitem,
      model()->CanPasteAndGo(sanitized_text_for_paste_and_go_));
  gtk_widget_show(paste_and_go_menuitem);

  // Show URL menu item.
  if (chrome::IsQueryExtractionEnabled()) {
    GtkWidget* show_url_menuitem = gtk_menu_item_new_with_mnemonic(
        ui::ConvertAcceleratorsFromWindowsStyle(
            l10n_util::GetStringUTF8(IDS_SHOW_URL)).c_str());
    gtk_menu_shell_append(GTK_MENU_SHELL(menu), show_url_menuitem);
    g_signal_connect(show_url_menuitem, "activate",
                     G_CALLBACK(HandleShowURLThunk), this);
    gtk_widget_set_sensitive(
        show_url_menuitem,
        controller()->GetToolbarModel()->WouldReplaceURL());
    gtk_widget_show(show_url_menuitem);
  }

  // Edit Search Engines menu item.
  GtkWidget* edit_search_engines_menuitem = gtk_menu_item_new_with_mnemonic(
      ui::ConvertAcceleratorsFromWindowsStyle(
          l10n_util::GetStringUTF8(IDS_EDIT_SEARCH_ENGINES)).c_str());
  gtk_menu_shell_append(GTK_MENU_SHELL(menu), edit_search_engines_menuitem);
  g_signal_connect(edit_search_engines_menuitem, "activate",
                   G_CALLBACK(HandleEditSearchEnginesThunk), this);
  gtk_widget_set_sensitive(
      edit_search_engines_menuitem,
      command_updater()->IsCommandEnabled(IDC_EDIT_SEARCH_ENGINES));
  gtk_widget_show(edit_search_engines_menuitem);

  g_signal_connect(menu, "deactivate",
                   G_CALLBACK(HandlePopupMenuDeactivateThunk), this);
}

void OmniboxViewGtk::HandlePasteAndGo(GtkWidget* sender) {
  model()->PasteAndGo(sanitized_text_for_paste_and_go_);
}

void OmniboxViewGtk::HandleEditSearchEngines(GtkWidget* sender) {
  command_updater()->ExecuteCommand(IDC_EDIT_SEARCH_ENGINES);
}

void OmniboxViewGtk::HandleShowURL(GtkWidget* sender) {
  ShowURL();
}

void OmniboxViewGtk::HandleMarkSet(GtkTextBuffer* buffer,
                                   GtkTextIter* location,
                                   GtkTextMark* mark) {
  if (!text_buffer_ || buffer != text_buffer_)
    return;

  if (mark != gtk_text_buffer_get_insert(text_buffer_) &&
      mark != gtk_text_buffer_get_selection_bound(text_buffer_)) {
    return;
  }

  // If we are here, that means the user may be changing the selection
  selection_suggested_ = false;

  // Get the currently-selected text, if there is any.
  std::string new_selected_text = GetSelectedText();

  // If we had some text selected earlier but it's no longer highlighted, we
  // might need to save it now...
  if (!selected_text_.empty() && new_selected_text.empty()) {
    // ... but only if we currently own the selection.  We want to manually
    // update the selection when the text is unhighlighted because the user
    // clicked in a blank area of the text view, but not when it's unhighlighted
    // because another client or widget took the selection.  (This handler gets
    // called before the default handler, so as long as nobody else took the
    // selection, the text buffer still owns it even if GTK is about to take it
    // away in the default handler.)
    GtkClipboard* clipboard = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
    if (gtk_clipboard_get_owner(clipboard) == G_OBJECT(text_buffer_))
      SavePrimarySelection(selected_text_);
  }

  selected_text_ = new_selected_text;
}

// Override the primary selection the text buffer has set. This has to happen
// after the default handler for the "mark-set" signal.
void OmniboxViewGtk::HandleMarkSetAfter(GtkTextBuffer* buffer,
                                        GtkTextIter* location,
                                        GtkTextMark* mark) {
  if (!text_buffer_ || buffer != text_buffer_)
    return;

  // We should only update primary selection when the user changes the selection
  // range.
  if (mark != gtk_text_buffer_get_insert(text_buffer_) &&
      mark != gtk_text_buffer_get_selection_bound(text_buffer_)) {
    return;
  }

  UpdatePrimarySelectionIfValidURL();
}

// Just use the default behavior for DnD, except if the drop can be a PasteAndGo
// then override.
void OmniboxViewGtk::HandleDragDataReceived(GtkWidget* sender,
                                            GdkDragContext* context,
                                            gint x,
                                            gint y,
                                            GtkSelectionData* selection_data,
                                            guint target_type,
                                            guint time) {
  DCHECK(text_view_);

  // Reset |paste_clipboard_requested_| to make sure we won't misinterpret this
  // drop action as a paste action.
  paste_clipboard_requested_ = false;

  // Don't try to PasteAndGo on drops originating from this omnibox. However, do
  // allow default behavior for such drags.
  if (gdk_drag_context_get_source_window(context) ==
      gtk_widget_get_window(text_view_))
    return;

  guchar* text = gtk_selection_data_get_text(selection_data);
  if (!text)
    return;

  base::string16 possible_url =
      base::UTF8ToUTF16(reinterpret_cast<char*>(text));
  g_free(text);
  if (OnPerformDropImpl(possible_url)) {
    gtk_drag_finish(context, TRUE, FALSE, time);

    static guint signal_id =
        g_signal_lookup("drag-data-received", GTK_TYPE_WIDGET);
    g_signal_stop_emission(text_view_, signal_id, 0);
  }
}

void OmniboxViewGtk::HandleDragDataGet(GtkWidget* widget,
                                       GdkDragContext* context,
                                       GtkSelectionData* selection_data,
                                       guint target_type,
                                       guint time) {
  DCHECK(text_view_);

  switch (target_type) {
    case GTK_TEXT_BUFFER_TARGET_INFO_TEXT: {
      gtk_selection_data_set_text(selection_data, dragged_text_.c_str(), -1);
      break;
    }
    case ui::CHROME_NAMED_URL: {
      WebContents* current_tab = controller()->GetWebContents();
      base::string16 tab_title = current_tab->GetTitle();
      // Pass an empty string if user has edited the URL.
      if (current_tab->GetURL().spec() != dragged_text_)
        tab_title = base::string16();
      ui::WriteURLWithName(selection_data, GURL(dragged_text_),
                           tab_title, target_type);
      break;
    }
  }
}

void OmniboxViewGtk::HandleDragBegin(GtkWidget* widget,
                                       GdkDragContext* context) {
  base::string16 text = base::UTF8ToUTF16(GetSelectedText());

  if (text.empty())
    return;

  // Use AdjustTextForCopy to make sure we prefix the text with 'http://'.
  CharRange selection = GetSelection();
  GURL url;
  bool write_url;
  model()->AdjustTextForCopy(selection.selection_min(), IsSelectAll(), &text,
                            &url, &write_url);
  if (write_url) {
    selected_text_ = base::UTF16ToUTF8(text);
    GtkTargetList* copy_targets =
        gtk_text_buffer_get_copy_target_list(text_buffer_);
    gtk_target_list_add(copy_targets,
                        ui::GetAtomForTarget(ui::CHROME_NAMED_URL),
                        GTK_TARGET_SAME_APP, ui::CHROME_NAMED_URL);
  }
  dragged_text_ = selected_text_;
}

void OmniboxViewGtk::HandleDragEnd(GtkWidget* widget,
                                       GdkDragContext* context) {
  GdkAtom atom = ui::GetAtomForTarget(ui::CHROME_NAMED_URL);
  GtkTargetList* copy_targets =
      gtk_text_buffer_get_copy_target_list(text_buffer_);
  gtk_target_list_remove(copy_targets, atom);
  dragged_text_.clear();
}

void OmniboxViewGtk::HandleInsertText(GtkTextBuffer* buffer,
                                      GtkTextIter* location,
                                      const gchar* text,
                                      gint len) {
  base::string16 filtered_text;
  filtered_text.reserve(len);

  // Filter out new line and tab characters.
  // |text| is guaranteed to be a valid UTF-8 string, so we don't need to
  // validate it here.
  //
  // If there was only a single character, then it might be generated by a key
  // event. In this case, we save the single character to help our
  // "key-press-event" signal handler distinguish if an Enter key event is
  // handled by IME or not.
  if (len == 1 && (text[0] == '\n' || text[0] == '\r'))
    enter_was_inserted_ = true;

  for (const gchar* p = text; *p && (p - text) < len;
       p = g_utf8_next_char(p)) {
    gunichar c = g_utf8_get_char(p);

    // 0x200B is Zero Width Space, which is inserted just before the gray text
    // anchor for working around the GtkTextView's misalignment bug.
    // This character might be captured and inserted into the content by undo
    // manager, so we need to filter it out here.
    if (c != 0x200B)
      base::WriteUnicodeCharacter(c, &filtered_text);
  }

  if (model()->is_pasting()) {
    // If the user is pasting all-whitespace, paste a single space
    // rather than nothing, since pasting nothing feels broken.
    filtered_text = base::CollapseWhitespace(filtered_text, true);
    filtered_text = filtered_text.empty() ? base::ASCIIToUTF16(" ") :
        StripJavascriptSchemas(filtered_text);
  }

  if (!filtered_text.empty()) {
    // Avoid inserting the text after the gray text anchor.
    ValidateTextBufferIter(location);

    // Call the default handler to insert filtered text.
    GtkTextBufferClass* klass = GTK_TEXT_BUFFER_GET_CLASS(buffer);
    std::string utf8_text = base::UTF16ToUTF8(filtered_text);
    klass->insert_text(buffer, location, utf8_text.data(),
                       static_cast<gint>(utf8_text.length()));
  }

  // Stop propagating the signal emission to prevent the default handler from
  // being called again.
  static guint signal_id = g_signal_lookup("insert-text", GTK_TYPE_TEXT_BUFFER);
  g_signal_stop_emission(buffer, signal_id, 0);
}

void OmniboxViewGtk::HandleBackSpace(GtkWidget* sender) {
  // Checks if it's currently in keyword search mode.
  if (model()->is_keyword_hint() || model()->keyword().empty())
    return;  // Propgate into GtkTextView.

  DCHECK(text_view_);

  GtkTextIter sel_start, sel_end;
  // Checks if there is some text selected.
  if (gtk_text_buffer_get_selection_bounds(text_buffer_, &sel_start, &sel_end))
    return;  // Propgate into GtkTextView.

  GtkTextIter start;
  gtk_text_buffer_get_start_iter(text_buffer_, &start);

  if (!gtk_text_iter_equal(&start, &sel_start))
    return;  // Propgate into GtkTextView.

  // We're showing a keyword and the user pressed backspace at the beginning
  // of the text. Delete the selected keyword.
  model()->ClearKeyword(GetText());

  // Stop propagating the signal emission into GtkTextView.
  static guint signal_id = g_signal_lookup("backspace", GTK_TYPE_TEXT_VIEW);
  g_signal_stop_emission(text_view_, signal_id, 0);
}

void OmniboxViewGtk::HandleViewMoveFocus(GtkWidget* widget,
                                         GtkDirectionType direction) {
  if (!tab_was_pressed_)
    return;

  // If special behavior is triggered, then stop the signal emission to
  // prevent the focus from being moved.
  bool handled = false;

  // Trigger Tab to search behavior only when Tab key is pressed.
  if (model()->is_keyword_hint() && !shift_was_pressed_) {
    handled = model()->AcceptKeyword(ENTERED_KEYWORD_MODE_VIA_TAB);
  } else if (model()->popup_model()->IsOpen()) {
    if (shift_was_pressed_ &&
        model()->popup_model()->selected_line_state() ==
            OmniboxPopupModel::KEYWORD)
      model()->ClearKeyword(GetText());
    else
      model()->OnUpOrDownKeyPressed(shift_was_pressed_ ? -1 : 1);

    handled = true;
  }

  if (supports_pre_edit_ && !handled && !pre_edit_.empty())
    handled = true;

  if (!handled && gtk_widget_get_visible(gray_text_view_))
    handled = model()->CommitSuggestedText();

  if (handled) {
    static guint signal_id = g_signal_lookup("move-focus", GTK_TYPE_WIDGET);
    g_signal_stop_emission(widget, signal_id, 0);
  }
}

void OmniboxViewGtk::HandleCopyClipboard(GtkWidget* sender) {
  HandleCopyOrCutClipboard(true);
}

void OmniboxViewGtk::HandleCutClipboard(GtkWidget* sender) {
  HandleCopyOrCutClipboard(false);
}

void OmniboxViewGtk::HandleCopyOrCutClipboard(bool copy) {
  DCHECK(text_view_);

  // On copy or cut, we manually update the PRIMARY selection to contain the
  // highlighted text.  This matches Firefox -- we highlight the URL but don't
  // update PRIMARY on Ctrl-L, so Ctrl-L, Ctrl-C and then middle-click is a
  // convenient way to paste the current URL somewhere.
  if (!gtk_text_buffer_get_has_selection(text_buffer_))
    return;

  GtkClipboard* clipboard = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
  DCHECK(clipboard);

  CharRange selection = GetSelection();
  GURL url;
  base::string16 text(base::UTF8ToUTF16(GetSelectedText()));
  bool write_url;
  model()->AdjustTextForCopy(selection.selection_min(), IsSelectAll(), &text,
                            &url, &write_url);

  if (IsSelectAll())
    UMA_HISTOGRAM_COUNTS(OmniboxEditModel::kCutOrCopyAllTextHistogram, 1);

  // On other platforms we write |text| to the clipboard regardless of
  // |write_url|.  We don't need to do that here because we fall through to
  // the default signal handlers.
  if (write_url) {
    BookmarkNodeData data;
    data.ReadFromTuple(url, text);
    data.WriteToClipboard(ui::CLIPBOARD_TYPE_COPY_PASTE);
    SetSelectedRange(selection);

    // Stop propagating the signal.
    static guint copy_signal_id =
        g_signal_lookup("copy-clipboard", GTK_TYPE_TEXT_VIEW);
    static guint cut_signal_id =
        g_signal_lookup("cut-clipboard", GTK_TYPE_TEXT_VIEW);
    g_signal_stop_emission(text_view_,
                           copy ? copy_signal_id : cut_signal_id,
                           0);

    if (!copy && gtk_text_view_get_editable(GTK_TEXT_VIEW(text_view_)))
      gtk_text_buffer_delete_selection(text_buffer_, true, true);
  }

  OwnPrimarySelection(base::UTF16ToUTF8(text));
}

int OmniboxViewGtk::GetOmniboxTextLength() const {
  GtkTextIter end;
  gtk_text_buffer_get_iter_at_mark(text_buffer_, &end, gray_text_mark_);
  if (supports_pre_edit_) {
    // We need to count the length of the text being composed, because we treat
    // it as part of the content in GetText().
    return gtk_text_iter_get_offset(&end) + pre_edit_.size();
  }
  return gtk_text_iter_get_offset(&end);
}

void OmniboxViewGtk::EmphasizeURLComponents() {
  if (supports_pre_edit_) {
    // We can't change the text style easily, if the pre-edit string (the text
    // being composed by the input method) is not empty, which is not treated as
    // a part of the text content inside GtkTextView. And it's ok to simply
    // return in this case, as this method will be called again when the
    // pre-edit string gets committed.
    if (pre_edit_.size()) {
      strikethrough_ = CharRange();
      return;
    }
  }
  // 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;
  base::string16 text(GetText());
  AutocompleteInput::ParseForEmphasizeComponents(text, &scheme, &host);

  // Set the baseline emphasis.
  GtkTextIter start, end;
  GetTextBufferBounds(&start, &end);
  gtk_text_buffer_remove_all_tags(text_buffer_, &start, &end);
  bool grey_out_url = text.substr(scheme.begin, scheme.len) ==
       base::UTF8ToUTF16(extensions::kExtensionScheme);
  bool grey_base = model()->CurrentTextIsURL() &&
      (host.is_nonempty() || grey_out_url);
  gtk_text_buffer_apply_tag(
      text_buffer_, grey_base ? faded_text_tag_ : normal_text_tag_ , &start,
      &end);

  if (grey_base && !grey_out_url) {
    // We've found a host name, give it more emphasis.
    gtk_text_buffer_get_iter_at_line_index(
        text_buffer_, &start, 0, GetUTF8Offset(text, host.begin));
    gtk_text_buffer_get_iter_at_line_index(
        text_buffer_, &end, 0, GetUTF8Offset(text, host.end()));
    gtk_text_buffer_apply_tag(text_buffer_, normal_text_tag_, &start, &end);
  }

  strikethrough_ = CharRange();
  // Emphasize the scheme for security UI display purposes (if necessary).
  if (!model()->user_input_in_progress() && model()->CurrentTextIsURL() &&
      scheme.is_nonempty() && (security_level_ != ToolbarModel::NONE)) {
    CharRange scheme_range = CharRange(GetUTF8Offset(text, scheme.begin),
                                       GetUTF8Offset(text, scheme.end()));
    ItersFromCharRange(scheme_range, &start, &end);

    if (security_level_ == ToolbarModel::SECURITY_ERROR) {
      strikethrough_ = scheme_range;
      // When we draw the strikethrough, we don't want to include the ':' at the
      // end of the scheme.
      strikethrough_.cp_max--;

      gtk_text_buffer_apply_tag(text_buffer_, security_error_scheme_tag_,
                                &start, &end);
    } else if (security_level_ == ToolbarModel::SECURITY_WARNING) {
      gtk_text_buffer_apply_tag(text_buffer_, faded_text_tag_, &start, &end);
    } else {
      gtk_text_buffer_apply_tag(text_buffer_, secure_scheme_tag_, &start, &end);
    }
  }
}

bool OmniboxViewGtk::OnPerformDropImpl(const base::string16& text) {
  base::string16 sanitized_string(StripJavascriptSchemas(
      base::CollapseWhitespace(text, true)));
  if (model()->CanPasteAndGo(sanitized_string)) {
    model()->PasteAndGo(sanitized_string);
    return true;
  }

  return false;
}

void OmniboxViewGtk::OnBrowserThemeChanged() {
  DCHECK(text_view_);

  bool use_gtk = theme_service_->UsingNativeTheme();
  if (use_gtk) {
    gtk_widget_modify_cursor(text_view_, NULL, NULL);
    gtk_widget_modify_base(text_view_, GTK_STATE_NORMAL, NULL);
    gtk_widget_modify_base(text_view_, GTK_STATE_SELECTED, NULL);
    gtk_widget_modify_text(text_view_, GTK_STATE_SELECTED, NULL);
    gtk_widget_modify_base(text_view_, GTK_STATE_ACTIVE, NULL);
    gtk_widget_modify_text(text_view_, GTK_STATE_ACTIVE, NULL);

    gtk_util::UndoForceFontSize(text_view_);
    gtk_util::UndoForceFontSize(gray_text_view_);

    // Grab the text colors out of the style and set our tags to use them.
    GtkStyle* style = gtk_rc_get_style(text_view_);

    // style may be unrealized at this point, so calculate the halfway point
    // between text[] and base[] manually instead of just using text_aa[].
    GdkColor average_color = gtk_util::AverageColors(
        style->text[GTK_STATE_NORMAL], style->base[GTK_STATE_NORMAL]);

    g_object_set(faded_text_tag_, "foreground-gdk", &average_color, NULL);
    g_object_set(normal_text_tag_, "foreground-gdk",
                 &style->text[GTK_STATE_NORMAL], NULL);
  } else {
    const GdkColor* background_color_ptr =
        &LocationBarViewGtk::kBackgroundColor;
    gtk_widget_modify_cursor(text_view_, &ui::kGdkBlack, &ui::kGdkGray);
    gtk_widget_modify_base(text_view_, GTK_STATE_NORMAL, background_color_ptr);

    GdkColor c;
    // Override the selected colors so we don't leak colors from the current
    // gtk theme into the chrome-theme.
    c = gfx::SkColorToGdkColor(
        theme_service_->get_active_selection_bg_color());
    gtk_widget_modify_base(text_view_, GTK_STATE_SELECTED, &c);

    c = gfx::SkColorToGdkColor(
        theme_service_->get_active_selection_fg_color());
    gtk_widget_modify_text(text_view_, GTK_STATE_SELECTED, &c);

    c = gfx::SkColorToGdkColor(
        theme_service_->get_inactive_selection_bg_color());
    gtk_widget_modify_base(text_view_, GTK_STATE_ACTIVE, &c);

    c = gfx::SkColorToGdkColor(
        theme_service_->get_inactive_selection_fg_color());
    gtk_widget_modify_text(text_view_, GTK_STATE_ACTIVE, &c);

    // Until we switch to vector graphics, force the font size.
    const gfx::Font& font = GetFont();
    gtk_util::ForceFontSizePixels(text_view_, font.GetFontSize());
    gtk_util::ForceFontSizePixels(gray_text_view_, font.GetFontSize());

    g_object_set(faded_text_tag_, "foreground", kTextBaseColor, NULL);
    g_object_set(normal_text_tag_, "foreground", "#000000", NULL);
  }

  const gfx::Font& font = GetFont();
  const int cap_height = font.GetCapHeight();
  const int internal_leading = font.GetBaseline() - cap_height;
  font_baseline_shift_ =
      (font.GetHeight() - cap_height) / 2.0 - internal_leading;

  AdjustVerticalAlignmentOfGrayTextView();
  UpdateGrayTextViewColors();
}

gfx::Font OmniboxViewGtk::GetFont() {
  if (!theme_service_->UsingNativeTheme()) {
    return gfx::Font(
        ui::ResourceBundle::GetSharedInstance().GetFont(
            ui::ResourceBundle::BaseFont).GetFontName(),
            browser_defaults::kOmniboxFontPixelSize);
  }

  // If we haven't initialized the text view yet, just create a temporary one
  // whose style we can grab.
  GtkWidget* widget = text_view_ ? text_view_ : gtk_text_view_new();
  GtkStyle* gtk_style = gtk_widget_get_style(widget);
  GtkRcStyle* rc_style = gtk_widget_get_modifier_style(widget);
  gfx::Font font(
      (rc_style && rc_style->font_desc) ?
          rc_style->font_desc : gtk_style->font_desc);
  if (!text_view_)
    g_object_unref(g_object_ref_sink(widget));
  return font;
}

void OmniboxViewGtk::OwnPrimarySelection(const std::string& text) {
  primary_selection_text_ = text;

  GtkTargetList* list = gtk_target_list_new(NULL, 0);
  gtk_target_list_add_text_targets(list, 0);
  gint len;
  GtkTargetEntry* entries = gtk_target_table_new_from_list(list, &len);

  // When |text_buffer_| is destroyed, it will clear the clipboard, hence
  // we needn't worry about calling gtk_clipboard_clear().
  gtk_clipboard_set_with_owner(gtk_clipboard_get(GDK_SELECTION_PRIMARY),
                               entries, len,
                               ClipboardGetSelectionThunk,
                               ClipboardSelectionCleared,
                               G_OBJECT(text_buffer_));

  gtk_target_list_unref(list);
  gtk_target_table_free(entries, len);
}

void OmniboxViewGtk::HandlePasteClipboard(GtkWidget* sender) {
  // We can't call model()->on_paste_replacing_all() here, because the actual
  // paste clipboard action may not be performed if the clipboard is empty.
  paste_clipboard_requested_ = true;
}

gfx::Rect OmniboxViewGtk::WindowBoundsFromIters(GtkTextIter* iter1,
                                                GtkTextIter* iter2) {
  GdkRectangle start_location, end_location;
  GtkTextView* text_view = GTK_TEXT_VIEW(text_view_);
  gtk_text_view_get_iter_location(text_view, iter1, &start_location);
  gtk_text_view_get_iter_location(text_view, iter2, &end_location);

  gint x1, x2, y1, y2;
  gtk_text_view_buffer_to_window_coords(text_view, GTK_TEXT_WINDOW_WIDGET,
                                        start_location.x, start_location.y,
                                        &x1, &y1);
  gtk_text_view_buffer_to_window_coords(text_view, GTK_TEXT_WINDOW_WIDGET,
                                        end_location.x + end_location.width,
                                        end_location.y + end_location.height,
                                        &x2, &y2);

  return gfx::Rect(x1, y1, x2 - x1, y2 - y1);
}

gboolean OmniboxViewGtk::HandleExposeEvent(GtkWidget* sender,
                                           GdkEventExpose* event) {
  // Adjust vertical alignment of |sender| before we start rendering it.
  // GtkTextView is a multi-line text edit control and scrollable.  Thus we
  // have to adjust the amount of scroll in order to put the content text at
  // the center of Omnibox.

  GtkTextView* text_view = GTK_TEXT_VIEW(sender);
  GtkTextIter iter;
  gtk_text_view_get_iter_at_location(text_view, &iter, 0, 0);
  gint line_height = 0;
  gtk_text_view_get_line_yrange(text_view, &iter, NULL, &line_height);

  GtkAllocation allocation;
  gtk_widget_get_allocation(alignment_.get(), &allocation);

  const double shift =
      (line_height - allocation.height) / 2.0 + font_baseline_shift_;

  // If the desired shift is positive (upwards), we can scroll the control to
  // accomplish it; but if the desired shift is downwards, we need to add extra
  // padding atop the control.
  const gdouble new_scroll = std::max(shift, 0.);
  const guint new_top_padding = std::max(0., -shift);

  // Changing the amount of scroll may fire another "expose-event", so avoid
  // unnecessary change.
  GtkAdjustment* adjustment = gtk_text_view_get_vadjustment(text_view);
  if (new_scroll != gtk_adjustment_get_value(adjustment))
    gtk_adjustment_set_value(adjustment, new_scroll);
  guint top_padding = 0;
  guint bottom_padding = 0;
  guint left_padding = 0;
  guint right_padding = 0;
  gtk_alignment_get_padding(GTK_ALIGNMENT(alignment_.get()), &top_padding,
                            &bottom_padding, &left_padding, &right_padding);
  if (new_top_padding != top_padding)
    gtk_alignment_set_padding(GTK_ALIGNMENT(alignment_.get()), new_top_padding,
                              bottom_padding, left_padding, right_padding);

  return FALSE;
}

gboolean OmniboxViewGtk::HandleExposeEventAfter(GtkWidget* sender,
                                                GdkEventExpose* expose) {
  if (strikethrough_.cp_min >= strikethrough_.cp_max)
    return FALSE;
  DCHECK(text_view_);

  gfx::Rect expose_rect(expose->area);

  GtkTextIter iter_min, iter_max;
  ItersFromCharRange(strikethrough_, &iter_min, &iter_max);
  gfx::Rect strikethrough_rect = WindowBoundsFromIters(&iter_min, &iter_max);

  if (!expose_rect.Intersects(strikethrough_rect))
    return FALSE;

  // Finally, draw.
  cairo_t* cr = gdk_cairo_create(GDK_DRAWABLE(expose->window));
  cairo_rectangle(cr, expose_rect.x(), expose_rect.y(),
                      expose_rect.width(), expose_rect.height());
  cairo_clip(cr);

  // TODO(estade): we probably shouldn't draw the strikethrough on selected
  // text. I started to do this, but it was way more effort than it seemed
  // worth.
  strikethrough_rect.Inset(kStrikethroughStrokeWidth,
                           kStrikethroughStrokeWidth);
  cairo_set_source_rgb(cr, kStrikethroughStrokeRed, 0.0, 0.0);
  cairo_set_line_width(cr, kStrikethroughStrokeWidth);
  cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
  cairo_move_to(cr, strikethrough_rect.x(), strikethrough_rect.bottom());
  cairo_line_to(cr, strikethrough_rect.right(), strikethrough_rect.y());
  cairo_stroke(cr);
  cairo_destroy(cr);

  return FALSE;
}

void OmniboxViewGtk::SelectAllInternal(bool reversed,
                                       bool update_primary_selection) {
  GtkTextIter start, end;
  if (reversed) {
    GetTextBufferBounds(&end, &start);
  } else {
    GetTextBufferBounds(&start, &end);
  }
  if (!update_primary_selection)
    StartUpdatingHighlightedText();
  gtk_text_buffer_select_range(text_buffer_, &start, &end);
  if (!update_primary_selection)
    FinishUpdatingHighlightedText();
}

void OmniboxViewGtk::StartUpdatingHighlightedText() {
  if (gtk_widget_get_realized(text_view_)) {
    GtkClipboard* clipboard =
        gtk_widget_get_clipboard(text_view_, GDK_SELECTION_PRIMARY);
    DCHECK(clipboard);
    if (clipboard)
      gtk_text_buffer_remove_selection_clipboard(text_buffer_, clipboard);
  }
  g_signal_handler_block(text_buffer_, mark_set_handler_id_);
  g_signal_handler_block(text_buffer_, mark_set_handler_id2_);
}

void OmniboxViewGtk::FinishUpdatingHighlightedText() {
  if (gtk_widget_get_realized(text_view_)) {
    GtkClipboard* clipboard =
        gtk_widget_get_clipboard(text_view_, GDK_SELECTION_PRIMARY);
    DCHECK(clipboard);
    if (clipboard)
      gtk_text_buffer_add_selection_clipboard(text_buffer_, clipboard);
  }
  g_signal_handler_unblock(text_buffer_, mark_set_handler_id_);
  g_signal_handler_unblock(text_buffer_, mark_set_handler_id2_);
}

OmniboxViewGtk::CharRange OmniboxViewGtk::GetSelection() const {
  // You can not just use get_selection_bounds here, since the order will be
  // ascending, and you don't know where the user's start and end of the
  // selection was (if the selection was forwards or backwards).  Get the
  // actual marks so that we can preserve the selection direction.
  GtkTextIter start, insert;
  GtkTextMark* mark;

  mark = gtk_text_buffer_get_selection_bound(text_buffer_);
  gtk_text_buffer_get_iter_at_mark(text_buffer_, &start, mark);

  mark = gtk_text_buffer_get_insert(text_buffer_);
  gtk_text_buffer_get_iter_at_mark(text_buffer_, &insert, mark);

  gint start_offset = gtk_text_iter_get_offset(&start);
  gint end_offset = gtk_text_iter_get_offset(&insert);

  if (supports_pre_edit_) {
    // Nothing should be selected when we are in the middle of composition.
    DCHECK(pre_edit_.empty() || start_offset == end_offset);
    if (!pre_edit_.empty()) {
      start_offset += pre_edit_.size();
      end_offset += pre_edit_.size();
    }
  }

  return CharRange(start_offset, end_offset);
}

void OmniboxViewGtk::ItersFromCharRange(const CharRange& range,
                                        GtkTextIter* iter_min,
                                        GtkTextIter* iter_max) {
  DCHECK(!IsImeComposing());
  gtk_text_buffer_get_iter_at_offset(text_buffer_, iter_min, range.cp_min);
  gtk_text_buffer_get_iter_at_offset(text_buffer_, iter_max, range.cp_max);
}

bool OmniboxViewGtk::IsCaretAtEnd() const {
  const CharRange selection = GetSelection();
  return selection.cp_min == selection.cp_max &&
      selection.cp_min == GetOmniboxTextLength();
}

void OmniboxViewGtk::SavePrimarySelection(const std::string& selected_text) {
  DCHECK(text_view_);

  GtkClipboard* clipboard =
      gtk_widget_get_clipboard(text_view_, GDK_SELECTION_PRIMARY);
  DCHECK(clipboard);
  if (!clipboard)
    return;

  gtk_clipboard_set_text(
      clipboard, selected_text.data(), selected_text.size());
}

void OmniboxViewGtk::SetTextAndSelectedRange(const base::string16& text,
                                             const CharRange& range) {
  if (text != GetText()) {
    std::string utf8 = base::UTF16ToUTF8(text);
    gtk_text_buffer_set_text(text_buffer_, utf8.data(), utf8.length());
  }
  SetSelectedRange(range);
  AdjustTextJustification();
}

void OmniboxViewGtk::SetSelectedRange(const CharRange& range) {
  GtkTextIter insert, bound;
  ItersFromCharRange(range, &bound, &insert);
  gtk_text_buffer_select_range(text_buffer_, &insert, &bound);

  // This should be set *after* setting the selection range, in case setting the
  // selection triggers HandleMarkSet which sets |selection_suggested_| to
  // false.
  selection_suggested_ = true;
}

void OmniboxViewGtk::AdjustTextJustification() {
  DCHECK(text_view_);

  PangoDirection content_dir = GetContentDirection();

  // Use keymap direction if content does not have strong direction.
  // It matches the behavior of GtkTextView.
  if (content_dir == PANGO_DIRECTION_NEUTRAL) {
    content_dir = gdk_keymap_get_direction(
      gdk_keymap_get_for_display(gtk_widget_get_display(text_view_)));
  }

  GtkTextDirection widget_dir = gtk_widget_get_direction(text_view_);

  if ((widget_dir == GTK_TEXT_DIR_RTL && content_dir == PANGO_DIRECTION_LTR) ||
      (widget_dir == GTK_TEXT_DIR_LTR && content_dir == PANGO_DIRECTION_RTL)) {
    gtk_text_view_set_justification(GTK_TEXT_VIEW(text_view_),
                                    GTK_JUSTIFY_RIGHT);
  } else {
    gtk_text_view_set_justification(GTK_TEXT_VIEW(text_view_),
                                    GTK_JUSTIFY_LEFT);
  }
}

PangoDirection OmniboxViewGtk::GetContentDirection() {
  GtkTextIter iter;
  gtk_text_buffer_get_start_iter(text_buffer_, &iter);

  PangoDirection dir = PANGO_DIRECTION_NEUTRAL;
  do {
    dir = pango_unichar_direction(gtk_text_iter_get_char(&iter));
    if (dir != PANGO_DIRECTION_NEUTRAL)
      break;
  } while (gtk_text_iter_forward_char(&iter));

  return dir;
}

void OmniboxViewGtk::HandleWidgetDirectionChanged(
    GtkWidget* sender,
    GtkTextDirection previous_direction) {
  AdjustTextJustification();
}

void OmniboxViewGtk::HandleDeleteFromCursor(GtkWidget* sender,
                                            GtkDeleteType type,
                                            gint count) {
  // If the selected text was suggested for autocompletion, then erase those
  // first and then let the default handler take over.
  if (selection_suggested_) {
    gtk_text_buffer_delete_selection(text_buffer_, true, true);
    selection_suggested_ = false;
  }
}

void OmniboxViewGtk::HandleKeymapDirectionChanged(GdkKeymap* sender) {
  AdjustTextJustification();
}

void OmniboxViewGtk::HandleDeleteRange(GtkTextBuffer* buffer,
                                       GtkTextIter* start,
                                       GtkTextIter* end) {
  // Prevent the user from deleting the gray text anchor. We can't simply set
  // the gray text anchor readonly by applying a tag with "editable" = FALSE,
  // because it'll prevent the insert caret from blinking.
  ValidateTextBufferIter(start);
  ValidateTextBufferIter(end);
  if (!gtk_text_iter_compare(start, end)) {
    static guint signal_id =
        g_signal_lookup("delete-range", GTK_TYPE_TEXT_BUFFER);
    g_signal_stop_emission(buffer, signal_id, 0);
  }
}

void OmniboxViewGtk::HandleMarkSetAlways(GtkTextBuffer* buffer,
                                         GtkTextIter* location,
                                         GtkTextMark* mark) {
  if (mark == gray_text_mark_ || !gray_text_mark_)
    return;

  GtkTextIter new_iter = *location;
  ValidateTextBufferIter(&new_iter);

  static guint signal_id = g_signal_lookup("mark-set", GTK_TYPE_TEXT_BUFFER);

  // "mark-set" signal is actually emitted after the mark's location is already
  // set, so if the location is beyond the gray text anchor, we need to move the
  // mark again, which will emit the signal again. In order to prevent other
  // signal handlers from being called twice, we need to stop signal emission
  // before moving the mark again.
  if (gtk_text_iter_compare(&new_iter, location)) {
    g_signal_stop_emission(buffer, signal_id, 0);
    gtk_text_buffer_move_mark(buffer, mark, &new_iter);
    return;
  }

  if (mark != gtk_text_buffer_get_insert(text_buffer_) &&
      mark != gtk_text_buffer_get_selection_bound(text_buffer_)) {
    return;
  }

  // See issue http://crbug.com/63860
  GtkTextIter insert;
  GtkTextIter selection_bound;
  gtk_text_buffer_get_iter_at_mark(buffer, &insert,
                                   gtk_text_buffer_get_insert(buffer));
  gtk_text_buffer_get_iter_at_mark(buffer, &selection_bound,
                                   gtk_text_buffer_get_selection_bound(buffer));

  GtkTextIter end;
  gtk_text_buffer_get_iter_at_mark(text_buffer_, &end, gray_text_mark_);

  if (gtk_text_iter_compare(&insert, &end) > 0 ||
      gtk_text_iter_compare(&selection_bound, &end) > 0) {
    g_signal_stop_emission(buffer, signal_id, 0);
  }
}

// static
void OmniboxViewGtk::ClipboardGetSelectionThunk(
    GtkClipboard* clipboard,
    GtkSelectionData* selection_data,
    guint info,
    gpointer object) {
  OmniboxViewGtk* omnibox_view =
      reinterpret_cast<OmniboxViewGtk*>(
          g_object_get_data(G_OBJECT(object), kOmniboxViewGtkKey));
  omnibox_view->ClipboardGetSelection(clipboard, selection_data, info);
}

void OmniboxViewGtk::ClipboardGetSelection(GtkClipboard* clipboard,
                                           GtkSelectionData* selection_data,
                                           guint info) {
  gtk_selection_data_set_text(selection_data, primary_selection_text_.c_str(),
                              primary_selection_text_.size());
}

std::string OmniboxViewGtk::GetSelectedText() const {
  GtkTextIter start, end;
  std::string result;
  if (gtk_text_buffer_get_selection_bounds(text_buffer_, &start, &end)) {
    gchar* text = gtk_text_iter_get_text(&start, &end);
    size_t text_len = strlen(text);
    if (text_len)
      result = std::string(text, text_len);
    g_free(text);
  }
  return result;
}

void OmniboxViewGtk::UpdatePrimarySelectionIfValidURL() {
  base::string16 text = base::UTF8ToUTF16(GetSelectedText());

  if (text.empty())
    return;

  // Use AdjustTextForCopy to make sure we prefix the text with 'http://'.
  CharRange selection = GetSelection();
  GURL url;
  bool write_url;
  model()->AdjustTextForCopy(selection.selection_min(), IsSelectAll(), &text,
                            &url, &write_url);
  if (write_url) {
    selected_text_ = base::UTF16ToUTF8(text);
    OwnPrimarySelection(selected_text_);
  }
}

void OmniboxViewGtk::HandlePreEditChanged(GtkWidget* sender,
                                          const gchar* pre_edit) {
  // GtkTextView won't fire "begin-user-action" and "end-user-action" signals
  // when changing the pre-edit string, so we need to call
  // OnBeforePossibleChange() and OnAfterPossibleChange() by ourselves.
  OnBeforePossibleChange();
  if (pre_edit && *pre_edit) {
    // GtkTextView will only delete the selection range when committing the
    // pre-edit string, which will cause very strange behavior, so we need to
    // delete the selection range here explicitly. See http://crbug.com/18808.
    if (pre_edit_.empty())
      gtk_text_buffer_delete_selection(text_buffer_, false, true);
    pre_edit_ = base::UTF8ToUTF16(pre_edit);
  } else {
    pre_edit_.clear();
  }
  OnAfterPossibleChange();
}

void OmniboxViewGtk::HandleWindowSetFocus(GtkWindow* sender,
                                          GtkWidget* focus) {
  // This is actually a guess. If the focused widget changes in "focus-out"
  // event handler, then the window will respect that and won't focus
  // |focus|. I doubt that is likely to happen however.
  going_to_focus_ = focus;
}

void OmniboxViewGtk::HandleUndoRedo(GtkWidget* sender) {
  OnBeforePossibleChange();
}

void OmniboxViewGtk::HandleUndoRedoAfter(GtkWidget* sender) {
  OnAfterPossibleChange();
}

void OmniboxViewGtk::GetTextBufferBounds(GtkTextIter* start,
                                         GtkTextIter* end) const {
  gtk_text_buffer_get_start_iter(text_buffer_, start);
  gtk_text_buffer_get_iter_at_mark(text_buffer_, end, gray_text_mark_);
}

void OmniboxViewGtk::ValidateTextBufferIter(GtkTextIter* iter) const {
  if (!gray_text_mark_)
    return;

  GtkTextIter end;
  gtk_text_buffer_get_iter_at_mark(text_buffer_, &end, gray_text_mark_);
  if (gtk_text_iter_compare(iter, &end) > 0)
    *iter = end;
}

void OmniboxViewGtk::AdjustVerticalAlignmentOfGrayTextView() {
  // By default, GtkTextView layouts an anchored child widget just above the
  // baseline, so we need to move the |gray_text_view_| down to make sure it
  // has the same baseline as the |text_view_|.
  PangoLayout* layout = gtk_label_get_layout(GTK_LABEL(gray_text_view_));
  int height;
  pango_layout_get_size(layout, NULL, &height);
  int baseline = pango_layout_get_baseline(layout);
  g_object_set(gray_text_anchor_tag_, "rise", baseline - height, NULL);
}