Move the remaining functionality of ChatDocumentHandler to ChatTextItemHelper or split into own objects

src/libneochat/chatkeyhelper.cpp

@@ -0,0 +1,122 @@
+// SPDX-FileCopyrightText: 2025 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+#include "chatkeyhelper.h"
+
+ChatKeyHelper::ChatKeyHelper(QObject *parent)
+    : QObject(parent)
+{
+}
+
+ChatTextItemHelper *ChatKeyHelper::textItem() const
+{
+    return m_textItem;
+}
+
+void ChatKeyHelper::setTextItem(ChatTextItemHelper *textItem)
+{
+    if (textItem == m_textItem) {
+        return;
+    }
+
+    if (m_textItem) {
+        m_textItem->disconnect(this);
+    }
+
+    m_textItem = textItem;
+
+    if (m_textItem) {
+        connect(m_textItem, &ChatTextItemHelper::textItemChanged, this, &ChatKeyHelper::textItemChanged);
+    }
+
+    Q_EMIT textItemChanged();
+}
+
+void ChatKeyHelper::up()
+{
+    if (!m_textItem) {
+        return;
+    }
+    QTextCursor cursor = m_textItem->textCursor();
+    if (cursor.isNull()) {
+        return;
+    }
+    if (cursor.blockNumber() == 0 && cursor.block().layout()->lineForTextPosition(cursor.positionInBlock()).lineNumber() == 0) {
+        Q_EMIT unhandledUp();
+        return;
+    }
+    cursor.movePosition(QTextCursor::Up);
+    m_textItem->setCursorPosition(cursor.position());
+}
+
+void ChatKeyHelper::down()
+{
+    if (!m_textItem) {
+        return;
+    }
+    QTextCursor cursor = m_textItem->textCursor();
+    if (cursor.isNull()) {
+        return;
+    }
+    if (cursor.blockNumber() == cursor.document()->blockCount() - 1
+        && cursor.block().layout()->lineForTextPosition(cursor.positionInBlock()).lineNumber() == (cursor.block().layout()->lineCount() - 1)) {
+        Q_EMIT unhandledDown();
+        return;
+    }
+    cursor.movePosition(QTextCursor::Down);
+    m_textItem->setCursorPosition(cursor.position());
+}
+
+void ChatKeyHelper::tab()
+{
+    QTextCursor cursor = m_textItem->textCursor();
+    if (cursor.isNull()) {
+        return;
+    }
+    if (cursor.currentList()) {
+        m_textItem->indentListMoreAtCursor();
+        return;
+    }
+    cursor.insertText(u"	"_s);
+}
+
+void ChatKeyHelper::deleteChar()
+{
+    QTextCursor cursor = m_textItem->textCursor();
+    if (cursor.isNull()) {
+        return;
+    }
+    if (cursor.position() >= m_textItem->document()->characterCount() - m_textItem->fixedEndChars().length() - 1) {
+        Q_EMIT unhandledDelete();
+        return;
+    }
+    cursor.deleteChar();
+}
+
+void ChatKeyHelper::backspace()
+{
+    QTextCursor cursor = m_textItem->textCursor();
+    if (cursor.isNull()) {
+        return;
+    }
+    if (cursor.position() <= m_textItem->fixedStartChars().length()) {
+        if (cursor.currentList()) {
+            m_textItem->indentListLessAtCursor();
+            return;
+        }
+        Q_EMIT unhandledBackspace();
+        return;
+    }
+    cursor.deletePreviousChar();
+}
+
+void ChatKeyHelper::insertReturn()
+{
+    QTextCursor cursor = m_textItem->textCursor();
+    if (cursor.isNull()) {
+        return;
+    }
+    cursor.insertBlock();
+}
+
+#include "moc_chatkeyhelper.cpp"