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-rw-r--r--widget/ContentData.h84
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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
+ * 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