// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module omnibox.mojom;

import "mojo/public/mojom/base/string16.mojom";
import "mojo/public/mojom/base/time.mojom";
import "ui/gfx/geometry/mojom/geometry.mojom";
import "url/mojom/url.mojom";

// Events that indicate that the user is about to navigate to a suggestion.
enum NavigationPredictor {
  kMouseDown = 1,            // The user pushed the mouse button down.
  kUpOrDownArrowButton = 2,  // The user pushed the down or up arrow button.
  kTouchDown = 3             // The user touched down on a suggestion.
};

// See components/omnibox/browser/autocomplete_match.h.
struct ACMatchClassification {
  uint32 offset;
  int32 style;
};

// See components/omnibox/browser/actions/omnibox_action.h
struct Action {
  mojo_base.mojom.String16 a11y_label;
  mojo_base.mojom.String16 hint;
  mojo_base.mojom.String16 suggestion_contents;
  // The url for the action icon. This is a relative url pointing to a
  // bundled resource and is used directly in CSS to show the icon.
  string icon_url;
};

// See components/omnibox/browser/suggestion_answer.h
struct SuggestionAnswer {
  mojo_base.mojom.String16 first_line;
  mojo_base.mojom.String16 second_line;
};

struct AutocompleteMatch {
  mojo_base.mojom.String16 a11y_label;
  bool allowed_to_be_default_match;
  array<Action> actions;
  SuggestionAnswer? answer;
  mojo_base.mojom.String16 contents;
  array<ACMatchClassification> contents_class;
  mojo_base.mojom.String16 description;
  array<ACMatchClassification> description_class;
  url.mojom.Url destination_url;
  mojo_base.mojom.String16 inline_autocompletion;
  mojo_base.mojom.String16 fill_into_edit;
  bool? is_weather_answer_suggestion;
  // The url for the suggestion icon. This is a relative url pointing to a
  // bundled resource and is used directly in CSS to show the icon.
  string icon_url;
  // Used to paint a placeholder while fetching |image_url|. These two fields
  // are valid for entity suggestions only. Entity suggestions have a |type| of
  // 'search-suggest-entity'.
  string image_dominant_color;
  // The image url for entity suggestions. |image_url| is an external url or
  // a data URI.
  string image_url;
  // Used to determine if the match has an image, calculator answer or
  // suggestion answer.
  bool is_rich_suggestion;
  bool is_search_type;  // Result of AutocompleteMatch::IsSearchType().
  string type;  // Result of AutocompleteMatchType::ToString().
  mojo_base.mojom.String16 remove_button_a11y_label;
  bool swap_contents_and_description;
  // ID of the group the suggestion belongs to. 0 if it does not belong to any.
  int32 suggestion_group_id;
  bool supports_deletion;
  // Holds the common part of tail suggestion. Not every match has a tail
  // suggestion prefix. For example, the tail suggestion prefix for "hobbit
  // holes for sale in" is "hobbit holes for sale" and the match contents
  // would be the text following "sale".
  mojo_base.mojom.String16? tail_suggest_common_prefix;
};

// Indicates whether a suggestion group is in the primary or the secondary
// column of suggestions. See //third_party/omnibox_proto/groups.proto.
enum SideType {
  kDefaultPrimary = 0,
  kSecondary = 1,
};

struct SuggestionGroup {
  mojo_base.mojom.String16 header;  // Header for suggestion group.
  mojo_base.mojom.String16 hide_group_a11y_label;
  mojo_base.mojom.String16 show_group_a11y_label;
  bool hidden;  // Whether suggestion group should be initially hidden.
  SideType side_type = SideType.kDefaultPrimary;
};

struct AutocompleteResult {
  mojo_base.mojom.String16 input;
  // Map of suggestion group IDs to their respective info.
  map<int32, SuggestionGroup> suggestion_groups_map;
  array<AutocompleteMatch> matches;
};

enum SelectionLineState {
  kFocusedButtonHeader = 0,
  kNormal = 1,
  kKeywordMode = 2,
  kFocusedButtonAction = 3,
  kFocusedButtonRemoveSuggestion = 4,
};

// See components/omnibox/browser/omnibox_popup_selection.h
struct OmniboxPopupSelection {
  uint8 line;
  SelectionLineState state;
  uint8 action_index;
};

// Browser-side handler for requests from WebUI page.
interface PageHandler {
  // The RealboxBrowserProxy singleton calls this when it's first initialized.
  SetPage(pending_remote<Page> page);
  // Informs the handler and model about focus state changes.
  OnFocusChanged(bool focused);
  // Queries autocomplete matches from the browser.
  QueryAutocomplete(mojo_base.mojom.String16 input,
                    bool prevent_inline_autocomplete);
  // Cancels the current autocomplete query. Clears the result set if
  // |clear_result| is true.
  StopAutocomplete(bool clear_result);
  // Handles navigation to an autocomplete match (i.e. an item in the realbox's
  // list of matches).
  // Note: |url| is only used to confirm the match |line| selection.
  // |mouse_button| indicates which mouse button was pressed on the match. See
  // https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/button
  OpenAutocompleteMatch(uint8 line,
                        url.mojom.Url url,
                        bool are_matches_showing,
                        uint8 mouse_button,
                        bool alt_key,
                        bool ctrl_key,
                        bool meta_key,
                        bool shift_key);
  // Informs the browser that the user has changed the selected suggestion. The
  // new suggestion is located at |line|. |navigation_predictor|
  // indicates the event that indicated navigation was likely.
  // |url| is only used to confirm the match |line| selection.
  OnNavigationLikely(uint8 line,
                     url.mojom.Url url,
                     NavigationPredictor navigation_predictor);
  // Deletes the AutocompleteMatch in the current results by |line| number if
  // it is deletable. |url| is used to confirm the match |line| selection.
  DeleteAutocompleteMatch(uint8 line, url.mojom.Url url);
  // Tells the browser to allow suggestions with the given suggestion group ID
  // to appear in the results if they currently are not allowed to or to prevent
  // them from appearing in the results if they are currently permitted to.
  ToggleSuggestionGroupIdVisibility(int32 suggestion_group_id);
  // Executes the Pedal Action. match_selection_timestamp is the number of
  // microseconds since Jan. 1, 1970 (ECMAScript epoch).
  // |url| is only used to confirm the match |line| selection.
  ExecuteAction(uint8 line,
                uint8 action_index,
                url.mojom.Url url,
                mojo_base.mojom.TimeTicks match_selection_timestamp,
                uint8 mouse_button,
                bool alt_key,
                bool ctrl_key,
                bool meta_key,
                bool shift_key);
  // Called when the popup results view element size is changed.
  PopupElementSizeChanged(gfx.mojom.Size size);
};

// WebUI-side handler for requests from the browser.
interface Page {
  // Updates the page with the autocomplete results.
  AutocompleteResultChanged(AutocompleteResult result);
  // Updates the UI's selected line and action based on the |selection| and
  // |old_selection|.
  UpdateSelection(OmniboxPopupSelection old_selection,
                  OmniboxPopupSelection selection);
};