Quelle ContentData.h Sprache: C

/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_ContentData_h
#define mozilla_ContentData_h

#include <sstream>

#include "mozilla/Attributes.h"
#include "mozilla/Debug.h"
#include "mozilla/EventForwards.h"
#include "mozilla/Maybe.h"
#include "mozilla/WritingModes.h"
#include "mozilla/widget/IMEData.h"

/**
* This file is intended for declaring classes which store DOM content data for
* widget classes.  Those data should be retrived by `WidgetQueryContentEvent`,
* notified with `IMENotification`, or set assumed data as result of dispatching
* widget events such as `WidgetKeyboardEvent`, `WidgetCompositionEvent`,
* `WidgetSelectionEvent` etc.
*/

namespace mozilla {

/**
* ContentSelection stores DOM selection in flattend text by
* ContentEventHandler.  It should be retrieved with `eQuerySelectedText` event,
* notified with `NOTIFY_IME_OF_SELECTION_CHANGE` or set by widget itself.
*/
class ContentSelection {
public:
  using SelectionChangeDataBase =
      widget::IMENotification::SelectionChangeDataBase;
  ContentSelection() = default;
  explicit ContentSelection(const SelectionChangeDataBase& aSelectionChangeData)
      : mOffsetAndData(Some(aSelectionChangeData.ToUint32OffsetAndData())),
        mWritingMode(aSelectionChangeData.GetWritingMode()) {}
  explicit ContentSelection(const WidgetQueryContentEvent& aSelectedTextEvent);
  ContentSelection(uint32_t aOffset, const WritingMode& aWritingMode)
      : mOffsetAndData(Some(OffsetAndData<uint32_t>(
            aOffset, EmptyString(), OffsetAndDataFor::SelectedString))),
        mWritingMode(aWritingMode) {}

  const OffsetAndData<uint32_t>& OffsetAndDataRef() const {
    return mOffsetAndData.ref();
  }

  void Collapse(uint32_t aOffset) {
    if (mOffsetAndData.isSome()) {
      mOffsetAndData->Collapse(aOffset);
    } else {
      mOffsetAndData.emplace(aOffset, EmptyString(),
                             OffsetAndDataFor::SelectedString);
    }
  }
  void Clear() {
    mOffsetAndData.reset();
    mWritingMode = WritingMode();
  }

  bool HasRange() const { return mOffsetAndData.isSome(); }
  const WritingMode& WritingModeRef() const { return mWritingMode; }

  friend std::ostream& operator<<(std::ostream& aStream,
                                  const ContentSelection& aContentSelection) {
    if (aContentSelection.HasRange()) {
      return aStream << "{ HasRange()=false }";
    }
    aStream << "{ mOffsetAndData=" << aContentSelection.mOffsetAndData
            << ", mWritingMode=" << aContentSelection.mWritingMode << " }";
    return aStream;
  }

private:
  Maybe<OffsetAndData<uint32_t>> mOffsetAndData;
  WritingMode mWritingMode;
};

}  // namespace mozilla

#endif  // #ifndef mozilla_ContentData_h

quality100%

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.