// Copyright 2019 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.

module remote_cocoa.mojom;

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

// Interface exposing a views::Widget's currently-focused views::View's
// ui::TextInputClient to the NSView corresponding to that views::Widget.
interface TextInputHost {
  // Returns true in |has_client| if there exists an active ui::TextInputClient
  // for the focused views::View.
  [Sync]
  HasClient() => (bool has_client);

  // Returns true in |has_input_context|| if -[NSView inputContext] should
  // return a non-nil value.
  [Sync]
  HasInputContext() => (bool has_input_context);

  // Returns true in |is_rtl| if there exists an active ui::TextInputClient and
  // that ui::TextInputClient is RTL (right-to-left).
  [Sync]
  IsRTL() => (bool is_rtl);

  // Retrieves the character range of current selection in the current text
  // input. Returns an invalid range if the information cannot be retrieved
  // right now or if the selected text is not in the focused views::View.
  [Sync]
  GetSelectionRange() => (gfx.mojom.Range range);

  // Retrieves the currently selected text, and stores it in |text|. Returns
  // false in |result| if there was no selection.
  [Sync]
  GetSelectionText() => (bool result, mojo_base.mojom.String16 text);

  // Inserts a given text at the insertion point.
  InsertText(mojo_base.mojom.String16 text, bool as_character);

  // Deletes contents in the given character range.
  DeleteRange(gfx.mojom.Range range);

  // Sets composition text in the current ui::TextInputClient to |text| with
  // selection range |selected_range|, and delete the content of
  // |replacement_range|.
  SetCompositionText(mojo_base.mojom.String16 text,
                     gfx.mojom.Range selected_range,
                     gfx.mojom.Range replacement_range);

  // Converts current composition text into final content.
  ConfirmCompositionText();

  // Returns true in |has_composition_text| if there is composition text.
  [Sync]
  HasCompositionText() => (bool has_composition_text);

  // Returns in |composition_range| the character range of current composition
  // text.
  [Sync]
  GetCompositionTextRange() => (gfx.mojom.Range composition_range);

  // Returns in |text| the string corresponding to |requested_range| for current
  // ui::TextInputClient. If a gfx::Range::InvalidRange() is passed, the full
  // string stored by for the current ui::TextInputClient is returned. Sets
  // |actual_range| corresponding to the returned string.
  [Sync]
  GetAttributedSubstringForRange(gfx.mojom.Range requested_range) =>
      (mojo_base.mojom.String16 text, gfx.mojom.Range actual_range);

  // Returns in |rect| the boundary rectangle for composition characters in the
  // |requested_range|. Sets |actual_range| corresponding to the returned
  // rectangle. For cases where there is no composition text or the
  // |requested_range| lies outside the composition range, a zero width
  // rectangle corresponding to the caret bounds is returned.
  [Sync]
  GetFirstRectForRange(gfx.mojom.Range requested_range) =>
      (gfx.mojom.Rect rect, gfx.mojom.Range actual_range);
};