chrome/browser/ui/omnibox/omnibox_popup_model.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_POPUP_MODEL_H_
   6 #define CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_POPUP_MODEL_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/observer_list.h"
  10 #include "chrome/browser/autocomplete/autocomplete_controller.h"
  11 #include "chrome/browser/autocomplete/autocomplete_result.h"
  12 #include "chrome/browser/ui/omnibox/omnibox_edit_model.h"
  13
  14 class OmniboxPopupModelObserver;
  15 class OmniboxPopupView;
  16
  17 namespace gfx {
  18 class Image;
  19 }
  20
  21 class OmniboxPopupModel {
  22  public:
  23   // See selected_line_state_ for details.
  24   enum LineState {
  25     NORMAL = 0,
  26     KEYWORD
  27   };
  28
  29   OmniboxPopupModel(OmniboxPopupView* popup_view, OmniboxEditModel* edit_model);
  30   ~OmniboxPopupModel();
  31
  32   // Returns true if the popup is currently open.
  33   bool IsOpen() const;
  34
  35   OmniboxPopupView* view() const { return view_; }
  36
  37   // Returns the AutocompleteController used by this popup.
  38   AutocompleteController* autocomplete_controller() const {
  39     return edit_model_->autocomplete_controller();
  40   }
  41
  42   const AutocompleteResult& result() const {
  43     return autocomplete_controller()->result();
  44   }
  45
  46   size_t hovered_line() const { return hovered_line_; }
  47
  48   // Call to change the hovered line.  |line| should be within the range of
  49   // valid lines (to enable hover) or kNoMatch (to disable hover).
  50   void SetHoveredLine(size_t line);
  51
  52   size_t selected_line() const { return selected_line_; }
  53
  54   LineState selected_line_state() const { return selected_line_state_; }
  55
  56   // Call to change the selected line.  This will update all state and repaint
  57   // the necessary parts of the window, as well as updating the edit with the
  58   // new temporary text.  |line| will be clamped to the range of valid lines.
  59   // |reset_to_default| is true when the selection is being reset back to the
  60   // default match, and thus there is no temporary text (and no
  61   // |manually_selected_match_|). If |force| is true then the selected line will
  62   // be updated forcibly even if the |line| is same as the current selected
  63   // line.
  64   // NOTE: This assumes the popup is open, and thus both old and new values for
  65   // the selected line should not be kNoMatch.
  66   void SetSelectedLine(size_t line, bool reset_to_default, bool force);
  67
  68   // Called when the user hits escape after arrowing around the popup.  This
  69   // will change the selected line back to the default match and redraw.
  70   void ResetToDefaultMatch();
  71
  72   // Immediately updates and opens the popup if necessary, then moves the
  73   // current selection down (|count| > 0) or up (|count| < 0), clamping to the
  74   // first or last result if necessary.  If |count| == 0, the selection will be
  75   // unchanged, but the popup will still redraw and modify the text in the
  76   // OmniboxEditModel.
  77   void Move(int count);
  78
  79   // If the selected line has both a normal match and a keyword match, this can
  80   // be used to choose which to select. It is an error to call this when the
  81   // selected line does not have both matches (or there is no selection).
  82   void SetSelectedLineState(LineState state);
  83
  84   // Called when the user hits shift-delete.  This should determine if the item
  85   // can be removed from history, and if so, remove it and update the popup.
  86   void TryDeletingCurrentItem();
  87
  88   // If |match| is from an extension, returns the extension icon; otherwise
  89   // returns an empty Image.
  90   gfx::Image GetIconIfExtensionMatch(const AutocompleteMatch& match) const;
  91
  92   // The match the user has manually chosen, if any.
  93   const AutocompleteResult::Selection& manually_selected_match() const {
  94     return manually_selected_match_;
  95   }
  96
  97   // Invoked from the edit model any time the result set of the controller
  98   // changes.
  99   void OnResultChanged();
 100
 101   // Add and remove observers.
 102   void AddObserver(OmniboxPopupModelObserver* observer);
 103   void RemoveObserver(OmniboxPopupModelObserver* observer);
 104
 105   // The token value for selected_line_, hover_line_ and functions dealing with
 106   // a "line number" that indicates "no line".
 107   static const size_t kNoMatch;
 108
 109  private:
 110   OmniboxPopupView* view_;
 111
 112   OmniboxEditModel* edit_model_;
 113
 114   // The line that's currently hovered.  If we're not drawing a hover rect,
 115   // this will be kNoMatch, even if the cursor is over the popup contents.
 116   size_t hovered_line_;
 117
 118   // The currently selected line.  This is kNoMatch when nothing is selected,
 119   // which should only be true when the popup is closed.
 120   size_t selected_line_;
 121
 122   // If the selected line has both a normal match and a keyword match, this
 123   // determines whether the normal match (if NORMAL) or the keyword match
 124   // (if KEYWORD) is selected.
 125   LineState selected_line_state_;
 126
 127   // The match the user has manually chosen, if any.
 128   AutocompleteResult::Selection manually_selected_match_;
 129
 130   // Observers.
 131   ObserverList<OmniboxPopupModelObserver> observers_;
 132
 133   DISALLOW_COPY_AND_ASSIGN(OmniboxPopupModel);
 134 };
 135
 136 #endif  // CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_POPUP_MODEL_H_