// Copyright 2018 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 content.mojom;

import "content/common/native_types.mojom";
import "content/common/input/input_handler.mojom";
import "mojo/public/mojom/base/string16.mojom";
import "services/ws/public/mojom/ime/ime.mojom";
import "ui/display/mojo/display.mojom";
import "ui/events/mojo/event.mojom";
import "ui/gfx/geometry/mojo/geometry.mojom";
import "ui/gfx/mojo/ca_layer_params.mojom";
import "ui/gfx/range/mojo/range.mojom";
import "ui/platform_window/mojo/text_input_state.mojom";

// The interface through which code in the browser process, in
// RenderWidgetHostViewMac, sends messages to the app shim process, targeting
// the RenderWidgetHostViewCocoa NSView. No synchronous communication is allowed
// in this direction.
interface RenderWidgetHostNSViewBridge {
  // Specify that the NSView will a popup (e.g, date/time picker) that will
  // create its own NSWindow.
  InitAsPopup(gfx.mojom.Rect content_rect,
              content.mojom.WebPopupType popup_type);

  // Disable displaying any content (including the background color). This is
  // to be called on views that are to be displayed via a parent ui::Compositor.
  DisableDisplay();

  // Make the NSView be the first responder of its NSWindow.
  MakeFirstResponder();

  // Set the bounds of the NSView or its enclosing NSWindow (depending on the
  // window type).
  SetBounds(gfx.mojom.Rect rect);

  // Set the contents to display in the NSView.
  SetCALayerParams(gfx.mojom.CALayerParams ca_layer_params);

  // Set the background SkColor color of the hosted CALayer.
  SetBackgroundColor(uint32 color);

  // Call the -[NSView setHidden:] method.
  SetVisible(bool visible);

  // Call the -[NSView setToolTipAtMousePoint] method.
  SetTooltipText(mojo_base.mojom.String16 display_text);

  // Forward changes in ui::TextInputType.
  SetTextInputType(ui.mojom.TextInputType text_input_type);

  // Forward the TextInputManager::TextSelection from the renderer.
  SetTextSelection(mojo_base.mojom.String16 text,
                   uint64 offset,
                   gfx.mojom.Range range);

  // Forward the TextInputManager::CompositionRangeInfo from the renderer.
  SetCompositionRangeInfo(gfx.mojom.Range range);

  // Clear the marked range.
  CancelComposition();

  // Indicate if the WebContext is showing a context menu or not.
  SetShowingContextMenu(bool showing);

  // Set the cursor type to display.
  DisplayCursor(WebCursor cursor);

  // Lock or unlock the cursor.
  SetCursorLocked(bool locked);

  // Open the dictionary overlay for the currently selected string. This
  // will roundtrip to the NSView to determine the selected range.
  ShowDictionaryOverlayForSelection();

  // Open the dictionary overlay for the specified string at the specified
  // point.
  ShowDictionaryOverlay(EncodedAttributedString attributed_string,
                        gfx.mojom.Point baseline_point);

  // Start intercepting keyboard events for the specified codes.
  LockKeyboard(array<uint32>? dom_codes);

  // Stop intercepting keyboard events.
  UnlockKeyboard();
};

// The interface through which the RenderWidgetHostViewCocoa NSView in the app
// shim process communicates to the RenderWidgetHostViewMac in the browser
// process. Synchronous calls are allowed to be made through this interface.
// TODO(ccameron): This corresponds almost one-to-one with the
// content::RenderWidgetHostNSViewClient interface. It may be possible to merge
// these two interfaces, though that may come at the cost of extra work (e.g,
// de-serializing and re-serializing all events).
// https://crbug.com/821651
interface RenderWidgetHostNSViewClient {
  // Synchronously query if there exists a RenderViewHost for the corresponding
  // RenderWidgetHostView's RenderWidgetHost, and return the result as
  // |is_render_view|.
  [Sync]
  SyncIsRenderViewHost() => (bool is_render_view);

  // Request that the RenderWidgetHost be shut down (e.g, when a date/time
  // picker window is closed).
  RequestShutdown();

  // Indicates whether or not the NSView is its NSWindow's first responder.
  OnFirstResponderChanged(bool is_first_responder);

  // Indicates whether or not the NSView is its NSWindow's first responder.
  OnWindowIsKeyChanged(bool is_key);

  // Indicates whether or not the NSView's NSWindow is key.
  OnBoundsInWindowChanged(
      gfx.mojom.Rect view_bounds_in_window_dip,
      bool attached_to_window);

  // Indicates the NSView's bounds in its NSWindow's DIP coordinate system (with
  // the origin at the upper-left corner), and indicate if the the NSView is
  // attached to an NSWindow (if it is not, then |view_bounds_in_window_dip|'s
  // origin is meaningless, but its size is still relevant).
  OnWindowFrameInScreenChanged(
      gfx.mojom.Rect window_frame_in_screen_dip);

  // Indicate changes to the NSView's NSScreen's properties.
  OnDisplayChanged(display.mojom.Display display);

  // Indicate the begin and end block of a keyboard event. The beginning of this
  // block will record the active RenderWidgetHost, and will forward all
  // remaining keyboard and Ime messages to that RenderWidgetHost.
  BeginKeyboardEvent();
  EndKeyboardEvent();

  // Forward a keyboard event to the RenderWidgetHost that is currently handling
  // the key-down event.
  ForwardKeyboardEvent(Event event, bool skip_in_browser);
  ForwardKeyboardEventWithCommands(
      Event event,
      bool skip_in_browser,
      array<content.mojom.EditCommand> commands);

  // Forward events to the renderer or the input router, as appropriate.
  RouteOrProcessMouseEvent(Event event);
  RouteOrProcessTouchEvent(Event event);
  RouteOrProcessWheelEvent(Event event);

  // Special case forwarding of synthetic events to the renderer.
  ForwardMouseEvent(Event event);
  ForwardWheelEvent(Event event);

  // Handling pinch gesture events. Note that for GestureBegin, the type of the
  // event is ignored, and is inferred from subsequent GestureUpdate calls.
  GestureBegin(Event event, bool is_synthetically_injected);
  GestureUpdate(Event event);
  GestureEnd(Event event);

  // Handle a double-tap magnify event.
  SmartMagnify(Event event);

  // Forward the corresponding Ime commands to the appropriate RenderWidgetHost.
  // Appropriate, has two meanings here. If this is during a key-down event,
  // then the target is the RWH that is handling that key-down event. Otherwise,
  // it is the result of GetActiveWidget.
  ImeSetComposition(
      mojo_base.mojom.String16 text,
      array<ws.mojom.ImeTextSpan> ime_text_spans,
      gfx.mojom.Range replacement_range,
      int32 selection_start,
      int32 selection_end);
  ImeCommitText(mojo_base.mojom.String16 text,
                gfx.mojom.Range replacement_range);
  ImeFinishComposingText();
  // Note that the function name ImeCancelComposition would conflict with a
  // method in RenderWidgetHostViewBase.
  ImeCancelCompositionFromCocoa();

  // Request an overlay dictionary be displayed for the text at the specified
  // point.
  LookUpDictionaryOverlayAtPoint(gfx.mojom.PointF root_point);

  // Request an overlay dictionary be displayed for the text in the the
  // specified character range.
  LookUpDictionaryOverlayFromRange(gfx.mojom.Range range);

  // Synchronously query the character index for |root_point|. Return UINT32_MAX
  // if the request fails or is not completed.
  [Sync]
  SyncGetCharacterIndexAtPoint(
      gfx.mojom.PointF root_point) => (uint32 index);

  // Synchronously query the composition character boundary rectangle and return
  // it as |out_rect|. Return |out_actual_range| as the range actually used for
  // the returned rectangle. If there was no focused RenderWidgetHost to query,
  // then return |success| as false.
  [Sync]
  SyncGetFirstRectForRange(
      gfx.mojom.Range
      requested_range,
      gfx.mojom.Rect rect,
      gfx.mojom.Range actual_range) =>
          (gfx.mojom.Rect out_rect,
           gfx.mojom.Range out_actual_range,
           bool success);

  // Forward the corresponding edit menu command to the RenderWidgetHost's
  // delegate.
  ExecuteEditCommand(string command);
  Undo();
  Redo();
  Cut();
  Copy();
  CopyToFindPboard();
  Paste();
  PasteAndMatchStyle();
  SelectAll();

  // Speak the selected text of the appropriate RenderWidgetHostView using
  // TextServicesContextMenu.
  StartSpeaking();

  // Stop speaking using TextServicesContextMenu.
  StopSpeaking();

  // Synchronously query if TextServicesContextMenu is currently speaking and
  // return the result as |is_speaking|.
  [Sync]
  SyncIsSpeaking() => (bool is_speaking);
};