1 files changed, 122 insertions, 0 deletions
diff --git a/src/qmlls/qtextcursor.cpp b/src/qmlls/qtextcursor.cpp
new file mode 100644
index 0000000000..79289c3fa5
--- /dev/null
+++ b/src/qmlls/qtextcursor.cpp
@@ -0,0 +1,122 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include "qtextcursor_p.h"
+#include "qtextdocument_p.h"
+#include "qtextblock_p.h"
+
+namespace Utils {
+
+class TextFrame;
+class TextTable;
+class TextTableCell;
+
+TextCursor::TextCursor(TextDocument *document) : m_document(document) { }
+
+bool TextCursor::movePosition(TextCursor::MoveOperation op, TextCursor::MoveMode mode, int n)
+{
+    Q_UNUSED(n);
+    switch (op) {
+    case NoMove:
+        return true;
+    case Start:
+        m_position = 0;
+        break;
+    case PreviousCharacter:
+        while (--n >= 0) {
+            if (m_position == 0)
+                return false;
+            --m_position;
+        }
+        break;
+    case End:
+        m_position = m_document->characterCount();
+        break;
+    case NextCharacter:
+        while (--n >= 0) {
+            if (m_position == m_document->characterCount())
+                return false;
+            ++m_position;
+        }
+        break;
+    }
+
+    if (mode == MoveAnchor)
+        m_anchor = m_position;
+
+    return false;
+}
+
+int TextCursor::position() const
+{
+    return m_position;
+}
+
+void TextCursor::setPosition(int pos, Utils::TextCursor::MoveMode mode)
+{
+    m_position = pos;
+    if (mode == MoveAnchor)
+        m_anchor = pos;
+}
+
+QString TextCursor::selectedText() const
+{
+    return m_document->toPlainText().mid(qMin(m_position, m_anchor), qAbs(m_position - m_anchor));
+}
+
+void TextCursor::clearSelection()
+{
+    m_anchor = m_position;
+}
+
+TextDocument *TextCursor::document() const
+{
+    return m_document;
+}
+
+void TextCursor::insertText(const QString &text)
+{
+    const QString orig = m_document->toPlainText();
+    const QString left = orig.left(qMin(m_position, m_anchor));
+    const QString right = orig.mid(qMax(m_position, m_anchor));
+    m_document->setPlainText(left + text + right);
+}
+
+TextBlock TextCursor::block() const
+{
+    TextBlock current = m_document->firstBlock();
+    while (current.isValid()) {
+        if (current.position() <= position()
+            && current.position() + current.length() > current.position())
+            break;
+        current = current.next();
+    }
+    return current;
+}
+
+int TextCursor::positionInBlock() const
+{
+    return m_position - block().position();
+}
+
+int TextCursor::blockNumber() const
+{
+    return block().blockNumber();
+}
+
+void TextCursor::removeSelectedText()
+{
+    insertText(QString());
+}
+
+int TextCursor::selectionEnd() const
+{
+    return qMax(m_position, m_anchor);
+}
+
+bool TextCursor::isNull() const
+{
+    return m_document == nullptr;
+}
+
+} // namespace Utils