Views-implementation of AutocompleteEditView

chrome/browser/autocomplete/autocomplete_edit_view_views.h

+// 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.
+
+#ifndef CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_VIEWS_H_
+#define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_VIEWS_H_
+#pragma once
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/scoped_ptr.h"
+#include "chrome/browser/autocomplete/autocomplete_edit_view.h"
+#include "chrome/browser/ui/toolbar/toolbar_model.h"
+#include "chrome/common/notification_observer.h"
+#include "chrome/common/notification_registrar.h"
+#include "chrome/common/page_transition_types.h"
+#include "views/controls/textfield/textfield.h"
+#include "views/view.h"
+#include "webkit/glue/window_open_disposition.h"
+
+class AutocompleteEditController;
+class AutocompleteEditModel;
+class AutocompletePopupView;
+class Profile;
+class TabContents;
+
+// Views-implementation of AutocompleteEditView. This is based on
+// gtk implementation. The following features are not yet supported.
+//
+// IME supoprt.
+// LTR support.
+// Selection behavior.
+// Cut,copy and paste behavior.
+// URL styles (strikestrough insecure scheme, emphasize host).
+// Custom context menu for omnibox.
+// Instant.
+class AutocompleteEditViewViews : public views::View,
+                                  public AutocompleteEditView,
+                                  public NotificationObserver,
+                                  public views::Textfield::Controller {
+ public:
+  AutocompleteEditViewViews(AutocompleteEditController* controller,
+                            ToolbarModel* toolbar_model,
+                            Profile* profile,
+                            CommandUpdater* command_updater,
+                            bool popup_window_mode,
+                            const views::View* location_bar);
+  virtual ~AutocompleteEditViewViews();
+
+  // Initialize, create the underlying views, etc;
+  void Init();
+
+  // Sets the colors of the text view according to the theme.
+  void SetBaseColor();
+
+  // Called after key even is handled either by HandleKeyEvent or by Textfield.
+  bool HandleAfterKeyEvent(const views::KeyEvent& event, bool handled);
+
+  // Called when KeyRelease event is generated on textfield.
+  bool HandleKeyReleaseEvent(const views::KeyEvent& event);
+
+  // Called when Focus is set/unset on textfield.
+  void HandleFocusIn();
+  void HandleFocusOut();
+
+  // Implements views::View
+  virtual bool OnMousePressed(const views::MouseEvent& event);
+  virtual void Layout();
+
+  // Implement the AutocompleteEditView interface.
+  virtual AutocompleteEditModel* model();
+  virtual const AutocompleteEditModel* model() const;
+
+  virtual void SaveStateToTab(TabContents* tab);
+
+  virtual void Update(const TabContents* tab_for_state_restoring);
+
+  virtual void OpenURL(const GURL& url,
+                       WindowOpenDisposition disposition,
+                       PageTransition::Type transition,
+                       const GURL& alternate_nav_url,
+                       size_t selected_line,
+                       const std::wstring& keyword);
+
+  virtual std::wstring GetText() const;
+
+  virtual bool IsEditingOrEmpty() const;
+  virtual int GetIcon() const;
+  virtual void SetUserText(const std::wstring& text);
+  virtual void SetUserText(const std::wstring& text,
+                           const std::wstring& display_text,
+                           bool update_popup);
+  virtual void SetWindowTextAndCaretPos(const std::wstring& text,
+                                        size_t caret_pos);
+  virtual void SetForcedQuery();
+  virtual bool IsSelectAll();
+  virtual bool DeleteAtEndPressed();
+  virtual void GetSelectionBounds(std::wstring::size_type* start,
+                                  std::wstring::size_type* end);
+  virtual void SelectAll(bool reversed);
+  virtual void RevertAll();
+  virtual void UpdatePopup();
+  virtual void ClosePopup();
+  virtual void SetFocus();
+  virtual void OnTemporaryTextMaybeChanged(const std::wstring& display_text,
+                                           bool save_original_selection);
+  virtual bool OnInlineAutocompleteTextMaybeChanged(
+      const std::wstring& display_text, size_t user_text_length);
+  virtual void OnRevertTemporaryText();
+  virtual void OnBeforePossibleChange();
+  virtual bool OnAfterPossibleChange();
+  virtual gfx::NativeView GetNativeView() const;
+  virtual CommandUpdater* GetCommandUpdater();
+  virtual views::View* AddToView(views::View* parent);
+  virtual int TextWidth() const;
+  virtual bool IsImeComposing() const;
+  virtual bool CommitInstantSuggestion(const std::wstring& typed_text,
+                                       const std::wstring& suggested_text);
+  virtual void SetInstantSuggestion(const string16& input);
+
+  // Overridden from NotificationObserver:
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+  // Overridden from Textfield::Controller
+  virtual void ContentsChanged(views::Textfield* sender,
+                               const string16& new_contents);
+  virtual bool HandleKeyEvent(views::Textfield* sender,
+                              const views::KeyEvent& key_event);
+
+ private:
+  // Return the number of characers in the current buffer.
+  size_t GetTextLength() const;
+
+  // Try to parse the current text as a URL and colorize the components.
+  void EmphasizeURLComponents();
+
+  // Internally invoked whenever the text changes in some way.
+  void TextChanged();
+
+  // Update the field with |text| and set the selection.
+  void SetTextAndSelectedRange(const std::wstring& text,
+                               const views::TextRange& range);
+
+  // Returns the selected text.
+  string16 GetSelectedText() const;
+
+  // Selects the text given by |caret| and |end|.
+  void SelectRange(size_t caret, size_t end);
+
+  views::Textfield* textfield_;
+
+  scoped_ptr<AutocompleteEditModel> model_;
+  scoped_ptr<AutocompletePopupView> popup_view_;
+  AutocompleteEditController* controller_;
+  ToolbarModel* toolbar_model_;
+
+  // The object that handles additional command functionality exposed on the
+  // edit, such as invoking the keyword editor.
+  CommandUpdater* command_updater_;
+
+  // When true, the location bar view is read only and also is has a slightly
+  // different presentation (smaller font size). This is used for popups.
+  bool popup_window_mode_;
+
+  ToolbarModel::SecurityLevel security_level_;
+
+  // Selection at the point where the user started using the
+  // arrows to move around in the popup.
+  views::TextRange saved_temporary_selection_;
+
+  // Tracking state before and after a possible change.
+  std::wstring text_before_change_;
+  views::TextRange sel_before_change_;
+
+  // TODO(oshima): following flags are copied from gtk implementation.
+  // It should be possible to refactor this class to simplify flags and
+  // logic. I'll work on this refactoring once all features are completed.
+
+  // Indicates whether the IME changed the text.  It's possible for the IME to
+  // handle a key event but not change the text contents (e.g., when pressing
+  // shift+del with no selection).
+  bool text_changed_;
+
+  // Was delete pressed?
+  bool delete_was_pressed_;
+
+  // Was the delete key pressed with an empty selection at the end of the edit?
+  bool delete_at_end_pressed_;
+
+  // Indicates if we are handling a key press event.
+  bool handling_key_press_;
+
+  // Indicates if omnibox's content maybe changed by a key press event, so that
+  // we need to call OnAfterPossibleChange() after handling the event.
+  // This flag should be set for changes directly caused by a key press event,
+  // including changes to content text, selection range and preedit string.
+  // Changes caused by function calls like SetUserText() should not affect this
+  // flag.
+  bool content_maybe_changed_by_key_press_;
+
+  DISALLOW_COPY_AND_ASSIGN(AutocompleteEditViewViews);
+};
+
+#endif  // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_VIEWS_H_