1 files changed, 50 insertions, 0 deletions
diff --git a/src/qmlls/qqmlcompletioncontextstrings.cpp b/src/qmlls/qqmlcompletioncontextstrings.cpp
new file mode 100644
index 0000000000..5fc2006661
--- /dev/null
+++ b/src/qmlls/qqmlcompletioncontextstrings.cpp
@@ -0,0 +1,50 @@
+// Copyright (C) 2023 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 "qqmlcompletioncontextstrings_p.h"
+
+CompletionContextStrings::CompletionContextStrings(QString code, qsizetype pos)
+    : m_code(code), m_pos(pos)
+{
+    // computes the context just before pos in code.
+    // After this code all the values of all the attributes should be correct (see above)
+    // handle also letter or numbers represented a surrogate pairs?
+    m_filterStart = m_pos;
+    while (m_filterStart != 0) {
+        QChar c = code.at(m_filterStart - 1);
+        if (!c.isLetterOrNumber() && c != u'_')
+            break;
+        else
+            --m_filterStart;
+    }
+    // handle spaces?
+    m_baseStart = m_filterStart;
+    while (m_baseStart != 0) {
+        QChar c = code.at(m_baseStart - 1);
+        if (c != u'.' || m_baseStart == 1)
+            break;
+        c = code.at(m_baseStart - 2);
+        if (!c.isLetterOrNumber() && c != u'_')
+            break;
+        qsizetype baseEnd = --m_baseStart;
+        while (m_baseStart != 0) {
+            QChar c = code.at(m_baseStart - 1);
+            if (!c.isLetterOrNumber() && c != u'_')
+                break;
+            else
+                --m_baseStart;
+        }
+        if (m_baseStart == baseEnd)
+            break;
+    }
+    m_atLineStart = true;
+    m_lineStart = m_baseStart;
+    while (m_lineStart != 0) {
+        QChar c = code.at(m_lineStart - 1);
+        if (c == u'\n' || c == u'\r')
+            break;
+        if (!c.isSpace())
+            m_atLineStart = false;
+        --m_lineStart;
+    }
+}