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LanguageClient: avoid creating a QTextDocument for every contents change

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clone the document when it is opened and adjust it after each contents
change

Change-Id: I4fd511a3b142b1875f1da7d241ab5cddf49322e8
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
This commit is contained in:
David Schulz
2022-08-18 14:51:16 +02:00
parent 825b781a07
commit 8031460734
1 changed files with 17 additions and 15 deletions
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32
src/plugins/languageclient/client.cpp
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@@ -289,9 +289,10 @@ public:
~OpenedDocument()
{
QObject::disconnect(contentsChangedConnection);
delete document;
}
QMetaObject::Connection contentsChangedConnection;
QString documentContents;
QTextDocument *document = nullptr;
};
QMap<TextEditor::TextDocument *, OpenedDocument> m_openedDocument;
@@ -628,7 +629,7 @@ void Client::openDocument(TextEditor::TextDocument *document)
}
}
d->m_openedDocument[document].documentContents = document->plainText();
d->m_openedDocument[document].document = document->document()->clone(this);
d->m_openedDocument[document].contentsChangedConnection
= connect(document,
&TextDocument::contentsChangedWithPosition,
@@ -1076,6 +1077,19 @@ void Client::documentContentsChanged(TextEditor::TextDocument *document,
}
}
const QString &text = document->textAt(position, charsAdded);
QTextCursor cursor(d->m_openedDocument[document].document);
// Workaround https://bugreports.qt.io/browse/QTBUG-80662
// The contentsChanged gives a character count that can be wrong for QTextCursor
// when there are special characters removed/added (like formating characters).
// Also, characterCount return the number of characters + 1 because of the hidden
// paragraph separator character.
// This implementation is based on QWidgetTextControlPrivate::_q_contentsChanged.
// For charsAdded, textAt handles the case itself.
cursor.setPosition(qMin(d->m_openedDocument[document].document->characterCount() - 1,
position + charsRemoved));
cursor.setPosition(position, QTextCursor::KeepAnchor);
if (syncKind != TextDocumentSyncKind::None) {
if (syncKind == TextDocumentSyncKind::Incremental) {
// If the new change is a pure insertion and its range is adjacent to the range of the
@@ -1083,7 +1097,6 @@ void Client::documentContentsChanged(TextEditor::TextDocument *document,
// For the typical case of the user typing a continuous sequence of characters,
// this will save a lot of TextDocumentContentChangeEvent elements in the data stream,
// as otherwise we'd send tons of single-character changes.
const QString &text = document->textAt(position, charsAdded);
auto &queue = d->m_documentsToUpdate[document];
bool append = true;
if (!queue.isEmpty() && charsRemoved == 0) {
@@ -1096,17 +1109,6 @@ void Client::documentContentsChanged(TextEditor::TextDocument *document,
}
}
if (append) {
QTextDocument oldDoc(d->m_openedDocument[document].documentContents);
QTextCursor cursor(&oldDoc);
// Workaround https://bugreports.qt.io/browse/QTBUG-80662
// The contentsChanged gives a character count that can be wrong for QTextCursor
// when there are special characters removed/added (like formating characters).
// Also, characterCount return the number of characters + 1 because of the hidden
// paragraph separator character.
// This implementation is based on QWidgetTextControlPrivate::_q_contentsChanged.
// For charsAdded, textAt handles the case itself.
cursor.setPosition(qMin(oldDoc.characterCount() - 1, position + charsRemoved));
cursor.setPosition(position, QTextCursor::KeepAnchor);
DidChangeTextDocumentParams::TextDocumentContentChangeEvent change;
change.setRange(Range(cursor));
change.setRangeLength(cursor.selectionEnd() - cursor.selectionStart());
@@ -1117,8 +1119,8 @@ void Client::documentContentsChanged(TextEditor::TextDocument *document,
d->m_documentsToUpdate[document] = {
DidChangeTextDocumentParams::TextDocumentContentChangeEvent(document->plainText())};
}
d->m_openedDocument[document].documentContents = document->plainText();
}
cursor.insertText(text);
++d->m_documentVersions[document->filePath()];
using namespace TextEditor;