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/* -*- 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
#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