Views-implementation of AutocompleteEditView

chrome/browser/autocomplete/autocomplete_edit_view_views.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/autocomplete/autocomplete_edit_view_views.h"
+
+#include "app/l10n_util.h"
+#include "base/logging.h"
+#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/app/chrome_command_ids.h"
+#include "chrome/browser/autocomplete/autocomplete_edit.h"
+#include "chrome/browser/autocomplete/autocomplete_match.h"
+#include "chrome/browser/autocomplete/autocomplete_popup_model.h"
+#include "chrome/browser/command_updater.h"
+#include "chrome/browser/tab_contents/tab_contents.h"
+#include "chrome/browser/ui/views/autocomplete/autocomplete_popup_contents_view.h"
+#include "chrome/browser/ui/views/location_bar/location_bar_view.h"
+#include "chrome/common/notification_service.h"
+#include "gfx/font.h"
+#include "googleurl/src/gurl.h"
+#include "grit/generated_resources.h"
+#include "net/base/escape.h"
+#include "views/border.h"
+#include "views/fill_layout.h"
+
+namespace {
+
+// Textfield for autocomplete that intercepts events that are necessary
+// for AutocompleteEditViewViews.
+class AutocompleteTextfield : public views::Textfield {
+ public:
+  explicit AutocompleteTextfield(
+      AutocompleteEditViewViews* autocomplete_edit_view)
+      : views::Textfield(views::Textfield::STYLE_DEFAULT),
+        autocomplete_edit_view_(autocomplete_edit_view) {
+    DCHECK(autocomplete_edit_view_);
+    RemoveBorder();
+  }
+
+  // views::View implementation
+  virtual void DidGainFocus() {
+    views::Textfield::DidGainFocus();
+    autocomplete_edit_view_->HandleFocusIn();
+  }
+
+  virtual void WillLoseFocus() {
+    views::Textfield::WillLoseFocus();
+    autocomplete_edit_view_->HandleFocusOut();
+  }
+
+  virtual bool OnKeyPressed(const views::KeyEvent& e) {
+    bool handled = views::Textfield::OnKeyPressed(e);
+    return autocomplete_edit_view_->HandleAfterKeyEvent(e, handled) || handled;
+  }
+
+  virtual bool OnKeyReleased(const views::KeyEvent& e) {
+    return autocomplete_edit_view_->HandleKeyReleaseEvent(e);
+  }
+
+  virtual bool IsFocusable() const {
+    // Bypass Textfield::IsFocusable. The omnibox in popup window requires
+    // focus in order for text selection to work.
+    return views::View::IsFocusable();
+  }
+
+ private:
+  AutocompleteEditViewViews* autocomplete_edit_view_;
+
+  DISALLOW_COPY_AND_ASSIGN(AutocompleteTextfield);
+};
+
+// Stores omnibox state for each tab.
+struct ViewState {
+  explicit ViewState(const views::TextRange& selection_range)
+      : selection_range(selection_range) {
+  }
+
+  // Range of selected text.
+  views::TextRange selection_range;
+};
+
+struct AutocompleteEditState {
+  AutocompleteEditState(const AutocompleteEditModel::State& model_state,
+                        const ViewState& view_state)
+      : model_state(model_state),
+        view_state(view_state) {
+  }
+
+  const AutocompleteEditModel::State model_state;
+  const ViewState view_state;
+};
+
+// Returns a lazily initialized property bag accessor for saving our state in a
+// TabContents.
+PropertyAccessor<AutocompleteEditState>* GetStateAccessor() {
+  static PropertyAccessor<AutocompleteEditState> state;
+  return &state;
+}
+
+const int kAutocompleteVerticalMargin = 4;
+
+}  // namespace
+
+AutocompleteEditViewViews::AutocompleteEditViewViews(
+    AutocompleteEditController* controller,
+    ToolbarModel* toolbar_model,
+    Profile* profile,
+    CommandUpdater* command_updater,
+    bool popup_window_mode,
+    const views::View* location_bar)
+    : model_(new AutocompleteEditModel(this, controller, profile)),
+      popup_view_(new AutocompletePopupContentsView(
+          gfx::Font(), this, model_.get(), profile, location_bar)),
+      controller_(controller),
+      toolbar_model_(toolbar_model),
+      command_updater_(command_updater),
+      popup_window_mode_(popup_window_mode),
+      security_level_(ToolbarModel::NONE),
+      delete_was_pressed_(false),
+      delete_at_end_pressed_(false) {
+  model_->SetPopupModel(popup_view_->GetModel());
+  set_border(views::Border::CreateEmptyBorder(kAutocompleteVerticalMargin, 0,
+                                              kAutocompleteVerticalMargin, 0));
+}
+
+AutocompleteEditViewViews::~AutocompleteEditViewViews() {
+  NotificationService::current()->Notify(
+      NotificationType::AUTOCOMPLETE_EDIT_DESTROYED,
+      Source<AutocompleteEditViewViews>(this),
+      NotificationService::NoDetails());
+  // 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();
+  model_.reset();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AutocompleteEditViewViews public:
+
+void AutocompleteEditViewViews::Init() {
+  // The height of the text view is going to change based on the font used.  We
+  // don't want to stretch the height, and we want it vertically centered.
+  // TODO(oshima): make sure the above happens with views.
+  textfield_ = new AutocompleteTextfield(this);
+  textfield_->SetController(this);
+
+  if (popup_window_mode_)
+    textfield_->SetReadOnly(true);
+
+  // Manually invoke SetBaseColor() because TOOLKIT_VIEWS doesn't observe
+  // themes.
+  SetBaseColor();
+}
+
+void AutocompleteEditViewViews::SetBaseColor() {
+  // TODO(oshima): Implment style change.
+  NOTIMPLEMENTED();
+}
+
+bool AutocompleteEditViewViews::HandleAfterKeyEvent(
+    const views::KeyEvent& event,
+    bool handled) {
+  handling_key_press_ = false;
+  if (content_maybe_changed_by_key_press_)
+    OnAfterPossibleChange();
+
+  if (event.GetKeyCode() == ui::VKEY_RETURN) {
+    bool alt_held = event.IsAltDown();
+    model_->AcceptInput(alt_held ? NEW_FOREGROUND_TAB : CURRENT_TAB, false);
+    handled = true;
+  } else if (!handled && event.GetKeyCode() == ui::VKEY_ESCAPE) {
+    // We can handle the Escape key if textfield 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.
+    handled = model_->OnEscapeKeyPressed();
+  } else if (event.GetKeyCode() == ui::VKEY_CONTROL) {
+    // Omnibox2 can switch its contents while pressing a control key. To switch
+    // the contents of omnibox2, we notify the AutocompleteEditModel class when
+    // the control-key state is changed.
+    model_->OnControlKeyChanged(true);
+  } else if (!text_changed_ && event.GetKeyCode() == ui::VKEY_DELETE &&
+             event.IsShiftDown()) {
+    // 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.
+    AutocompletePopupModel* popup_model = popup_view_->GetModel();
+    if (popup_model->IsOpen())
+      popup_model->TryDeletingCurrentItem();
+  } else if (!handled && event.GetKeyCode() == ui::VKEY_UP) {
+    model_->OnUpOrDownKeyPressed(-1);
+    handled = true;
+  } else if (!handled && event.GetKeyCode() == ui::VKEY_DOWN) {
+    model_->OnUpOrDownKeyPressed(1);
+    handled = true;
+  } else if (!handled &&
+             event.GetKeyCode() == ui::VKEY_TAB &&
+             !event.IsShiftDown() &&
+             !event.IsControlDown()) {
+    if (model_->is_keyword_hint() && !model_->keyword().empty()) {
+      model_->AcceptKeyword();
+      handled = true;
+    } else {
+      // TODO(Oshima): handle instant
+    }
+  }
+  // TODO(oshima): page up & down
+
+  return handled;
+}
+
+bool AutocompleteEditViewViews::HandleKeyReleaseEvent(
+    const views::KeyEvent& event) {
+  // Omnibox2 can switch its contents while pressing a control key. To switch
+  // the contents of omnibox2, we notify the AutocompleteEditModel class when
+  // the control-key state is changed.
+  if (event.GetKeyCode() == ui::VKEY_CONTROL) {
+    // TODO(oshima): investigate if we need to support keyboard with two
+    // controls. See autocomplete_edit_view_gtk.cc.
+    model_->OnControlKeyChanged(false);
+    return true;
+  }
+  return false;
+}
+
+void AutocompleteEditViewViews::HandleFocusIn() {
+  // TODO(oshima): Get control key state.
+  model_->OnSetFocus(false);
+  // Don't call controller_->OnSetFocus as this view has already
+  // acquired the focus.
+}
+
+void AutocompleteEditViewViews::HandleFocusOut() {
+  // TODO(oshima): we don't have native view. This requires
+  // further refactoring.
+  controller_->OnAutocompleteLosingFocus(NULL);
+  // Close the popup.
+  ClosePopup();
+  // Tell the model to reset itself.
+  model_->OnKillFocus();
+  controller_->OnKillFocus();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AutocompleteEditViewViews, views::View implementation:
+
+bool AutocompleteEditViewViews::OnMousePressed(
+    const views::MouseEvent& event) {
+  if (event.IsLeftMouseButton()) {
+    // Button press event may change the selection, we need to record the change
+    // and report it to |model_| later when button is released.
+    OnBeforePossibleChange();
+  }
+  // Pass the event through to TextfieldViews.
+  return false;
+}
+
+void AutocompleteEditViewViews::Layout() {
+  gfx::Insets insets = GetInsets();
+  textfield_->SetBounds(insets.left(), insets.top(),
+                        width() - insets.width(),
+                        height() - insets.height());
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AutocompleteEditViewViews, AutocopmleteEditView implementation:
+
+AutocompleteEditModel* AutocompleteEditViewViews::model() {
+  return model_.get();
+}
+
+const AutocompleteEditModel* AutocompleteEditViewViews::model() const {
+  return model_.get();
+}
+
+void AutocompleteEditViewViews::SaveStateToTab(TabContents* tab) {
+  DCHECK(tab);
+
+  // NOTE: GetStateForTabSwitch may affect GetSelection, so order is important.
+  AutocompleteEditModel::State model_state = model_->GetStateForTabSwitch();
+  views::TextRange selection;
+  textfield_->GetSelectedRange(&selection);
+  GetStateAccessor()->SetProperty(
+      tab->property_bag(),
+      AutocompleteEditState(model_state, ViewState(selection)));
+}
+
+void AutocompleteEditViewViews::Update(const TabContents* contents) {
+  // NOTE: We're getting the URL text here from the ToolbarModel.
+  bool visibly_changed_permanent_text =
+      model_->UpdatePermanentText(toolbar_model_->GetText());
+
+  ToolbarModel::SecurityLevel security_level =
+        toolbar_model_->GetSecurityLevel();
+  bool changed_security_level = (security_level != security_level_);
+  security_level_ = security_level;
+
+  // TODO(oshima): Copied from gtk implementation which is
+  // slightly different from WIN impl. Find out the correct implementation
+  // for views-implementation.
+  if (contents) {
+    RevertAll();
+    const AutocompleteEditState* state =
+        GetStateAccessor()->GetProperty(contents->property_bag());
+    if (state) {
+      model_->RestoreState(state->model_state);
+
+      // Move the marks for the cursor and the other end of the selection to
+      // the previously-saved offsets (but preserve PRIMARY).
+      textfield_->SelectRange(state->view_state.selection_range);
+    }
+  } else if (visibly_changed_permanent_text) {
+    RevertAll();
+  } else if (changed_security_level) {
+    EmphasizeURLComponents();
+  }
+}
+
+void AutocompleteEditViewViews::OpenURL(const GURL& url,
+                                        WindowOpenDisposition disposition,
+                                        PageTransition::Type transition,
+                                        const GURL& alternate_nav_url,
+                                        size_t selected_line,
+                                        const std::wstring& keyword) {
+  if (!url.is_valid())
+    return;
+
+  model_->OpenURL(url, disposition, transition, alternate_nav_url,
+                  selected_line, keyword);
+}
+
+std::wstring AutocompleteEditViewViews::GetText() const {
+  // TODO(oshima): IME support
+  return UTF16ToWide(textfield_->text());
+}
+
+bool AutocompleteEditViewViews::IsEditingOrEmpty() const {
+  return model_->user_input_in_progress() || (GetTextLength() == 0);
+}
+
+int AutocompleteEditViewViews::GetIcon() const {
+  return IsEditingOrEmpty() ?
+      AutocompleteMatch::TypeToIcon(model_->CurrentTextType()) :
+      toolbar_model_->GetIcon();
+}
+
+void AutocompleteEditViewViews::SetUserText(const std::wstring& text) {
+  SetUserText(text, text, true);
+}
+
+void AutocompleteEditViewViews::SetUserText(const std::wstring& text,
+                                            const std::wstring& display_text,
+                                            bool update_popup) {
+  model_->SetUserText(text);
+  SetWindowTextAndCaretPos(display_text, display_text.length());
+  if (update_popup)
+    UpdatePopup();
+  TextChanged();
+}
+
+void AutocompleteEditViewViews::SetWindowTextAndCaretPos(
+    const std::wstring& text,
+    size_t caret_pos) {
+  const views::TextRange range(caret_pos, caret_pos);
+  SetTextAndSelectedRange(text, range);
+}
+
+void AutocompleteEditViewViews::SetForcedQuery() {
+  const std::wstring current_text(GetText());
+  const size_t start = current_text.find_first_not_of(kWhitespaceWide);
+  if (start == std::wstring::npos || (current_text[start] != '?')) {
+    SetUserText(L"?");
+  } else {
+    SelectRange(current_text.size(), start + 1);
+  }
+}
+
+bool AutocompleteEditViewViews::IsSelectAll() {
+  // TODO(oshima): IME support.
+  return textfield_->text() == textfield_->GetSelectedText();
+}
+
+bool AutocompleteEditViewViews::DeleteAtEndPressed() {
+  return delete_at_end_pressed_;
+}
+
+void AutocompleteEditViewViews::GetSelectionBounds(
+    std::wstring::size_type* start,
+    std::wstring::size_type* end) {
+  views::TextRange range;
+  textfield_->GetSelectedRange(&range);
+  *start = static_cast<size_t>(range.end());
+  *end = static_cast<size_t>(range.start());
+}
+
+void AutocompleteEditViewViews::SelectAll(bool reversed) {
+  if (reversed)
+    SelectRange(GetTextLength(), 0);
+  else
+    SelectRange(0, GetTextLength());
+}
+
+void AutocompleteEditViewViews::RevertAll() {
+  ClosePopup();
+  model_->Revert();
+  TextChanged();
+}
+
+void AutocompleteEditViewViews::UpdatePopup() {
+  model_->SetInputInProgress(true);
+  if (!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.
+  views::TextRange sel;
+  textfield_->GetSelectedRange(&sel);
+  bool no_inline_autocomplete = sel.GetMax() < GetTextLength();
+
+  // TODO(oshima): Support IME. Don't show autocomplete if IME has some text.
+  model_->StartAutocomplete(!sel.is_empty(), no_inline_autocomplete);
+}
+
+void AutocompleteEditViewViews::ClosePopup() {
+  if (popup_view_->GetModel()->IsOpen())
+    controller_->OnAutocompleteWillClosePopup();
+
+  popup_view_->GetModel()->StopAutocomplete();
+}
+
+void AutocompleteEditViewViews::SetFocus() {
+  // In views-implementation, the focus is on textfield rather than
+  // AutocompleteEditView.
+  textfield_->RequestFocus();
+}
+
+void AutocompleteEditViewViews::OnTemporaryTextMaybeChanged(
+    const std::wstring& display_text,
+    bool save_original_selection) {
+  if (save_original_selection)
+    textfield_->GetSelectedRange(&saved_temporary_selection_);
+
+  SetWindowTextAndCaretPos(display_text, display_text.length());
+  TextChanged();
+}
+
+bool AutocompleteEditViewViews::OnInlineAutocompleteTextMaybeChanged(
+    const std::wstring& display_text,
+    size_t user_text_length) {
+  if (display_text == GetText())
+    return false;
+  views::TextRange range(display_text.size(), user_text_length);
+  SetTextAndSelectedRange(display_text, range);
+  TextChanged();
+  return true;
+}
+
+void AutocompleteEditViewViews::OnRevertTemporaryText() {
+  textfield_->SelectRange(saved_temporary_selection_);
+  TextChanged();
+}
+
+void AutocompleteEditViewViews::OnBeforePossibleChange() {
+  // Record our state.
+  text_before_change_ = GetText();
+  textfield_->GetSelectedRange(&sel_before_change_);
+}
+
+bool AutocompleteEditViewViews::OnAfterPossibleChange() {
+  // OnAfterPossibleChange should be called once per modification,
+  // and we should ignore if this is called while a key event is being handled
+  // because OnAfterPossibleChagne will be called after the key event is
+  // actually handled.
+  if (handling_key_press_) {
+    content_maybe_changed_by_key_press_ = true;
+    return false;
+  }
+  views::TextRange new_sel;
+  textfield_->GetSelectedRange(&new_sel);
+
+  size_t length = GetTextLength();
+  bool at_end_of_edit = (new_sel.start() == length && new_sel.end() == length);
+
+  // See if the text or selection have changed since OnBeforePossibleChange().
+  std::wstring new_text = GetText();
+  text_changed_ = (new_text != text_before_change_);
+  bool selection_differs = !sel_before_change_.Equals(new_sel);
+
+  // When the user has deleted text, we don't allow inline autocomplete.  Make
+  // sure to not flag cases like selecting part of the text and then pasting
+  // (or typing) the prefix of that selection.  (We detect these by making
+  // sure the caret, which should be after any insertion, hasn't moved
+  // forward of the old selection start.)
+  bool just_deleted_text =
+      (text_before_change_.length() > new_text.length()) &&
+      (new_sel.start() <= sel_before_change_.GetMin());
+
+  delete_at_end_pressed_ = false;
+
+  bool something_changed = model_->OnAfterPossibleChange(new_text,
+      selection_differs, text_changed_, just_deleted_text, at_end_of_edit);
+
+  // If only selection was changed, we don't need to call |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;
+    controller_->OnChanged();
+  }
+  delete_was_pressed_ = false;
+
+  return something_changed;
+}
+
+gfx::NativeView AutocompleteEditViewViews::GetNativeView() const {
+  return GetWidget()->GetNativeView();
+}
+
+CommandUpdater* AutocompleteEditViewViews::GetCommandUpdater() {
+  return command_updater_;
+}
+
+views::View* AutocompleteEditViewViews::AddToView(views::View* parent) {
+  parent->AddChildView(this);
+  AddChildView(textfield_);
+  return this;
+}
+
+int AutocompleteEditViewViews::TextWidth() const {
+  // TODO(oshima): add horizontal margin.
+  return textfield_->font().GetStringWidth(textfield_->text());
+}
+
+bool AutocompleteEditViewViews::IsImeComposing() const {
+  return false;
+}
+
+bool AutocompleteEditViewViews::CommitInstantSuggestion(
+    const std::wstring& typed_text,
+    const std::wstring& suggested_text) {
+  model_->FinalizeInstantQuery(typed_text, suggested_text);
+  return true;
+}
+
+void AutocompleteEditViewViews::SetInstantSuggestion(const string16& input) {
+  NOTIMPLEMENTED();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AutocompleteEditViewViews, NotificationObserver implementation:
+
+void AutocompleteEditViewViews::Observe(NotificationType type,
+                                      const NotificationSource& source,
+                                      const NotificationDetails& details) {
+  DCHECK(type == NotificationType::BROWSER_THEME_CHANGED);
+  SetBaseColor();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AutocompleteEditViewViews, Textfield::Controller implementation:
+
+void AutocompleteEditViewViews::ContentsChanged(views::Textfield* sender,
+                                                const string16& new_contents) {
+  if (handling_key_press_)
+    content_maybe_changed_by_key_press_ = true;
+}
+
+bool AutocompleteEditViewViews::HandleKeyEvent(
+    views::Textfield* textfield,
+    const views::KeyEvent& event) {
+  delete_was_pressed_ = event.GetKeyCode() == ui::VKEY_DELETE;
+
+  // 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;
+
+  if (event.GetKeyCode() == ui::VKEY_BACK) {
+    // Checks if it's currently in keyword search mode.
+    if (model_->is_keyword_hint() || model_->keyword().empty())
+      return false;
+    // If there is selection, let textfield handle the backspace.
+    if (!textfield_->GetSelectedText().empty())
+      return false;
+    // If not at the begining of the text, let textfield handle the backspace.
+    if (textfield_->GetCursorPosition())
+      return false;
+    model_->ClearKeyword(GetText());
+    return true;
+  }
+
+  return false;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AutocompleteEditViewViews, private:
+
+size_t AutocompleteEditViewViews::GetTextLength() const {
+  // TODO(oshima): Support instant, IME.
+  return textfield_->text().length();
+}
+
+void AutocompleteEditViewViews::EmphasizeURLComponents() {
+  // TODO(oshima): Update URL visual style
+  NOTIMPLEMENTED();
+}
+
+void AutocompleteEditViewViews::TextChanged() {
+  EmphasizeURLComponents();
+  controller_->OnChanged();
+}
+
+void AutocompleteEditViewViews::SetTextAndSelectedRange(
+    const std::wstring& text,
+    const views::TextRange& range) {
+  if (text != GetText())
+    textfield_->SetText(WideToUTF16(text));
+  textfield_->SelectRange(range);
+}
+
+string16 AutocompleteEditViewViews::GetSelectedText() const {
+  // TODO(oshima): Support instant, IME.
+  return textfield_->GetSelectedText();
+}
+
+void AutocompleteEditViewViews::SelectRange(size_t caret, size_t end) {
+  const views::TextRange range(caret, end);
+  textfield_->SelectRange(range);
+}