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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "documentcontentcompletion.h"
#include "assistinterface.h"
#include "assistproposalitem.h"
#include "genericproposal.h"
#include "genericproposalmodel.h"
#include "iassistprocessor.h"
#include "../snippets/snippetassistcollector.h"
#include "../completionsettings.h"
#include "../texteditorsettings.h"
#include <utils/algorithm.h>
#include <utils/runextensions.h>
#include <QElapsedTimer>
#include <QRegularExpression>
#include <QSet>
#include <QTextBlock>
#include <QTextDocument>
using namespace TextEditor;
class DocumentContentCompletionProcessor final : public IAssistProcessor
{
public:
DocumentContentCompletionProcessor(const QString &snippetGroupId);
~DocumentContentCompletionProcessor() final;
IAssistProposal *perform(const AssistInterface *interface) override;
bool running() final { return m_watcher.isRunning(); }
void cancel() final;
private:
QString m_snippetGroup;
QFutureWatcher<QStringList> m_watcher;
};
DocumentContentCompletionProvider::DocumentContentCompletionProvider(const QString &snippetGroup)
: m_snippetGroup(snippetGroup)
{ }
IAssistProvider::RunType DocumentContentCompletionProvider::runType() const
{
return Asynchronous;
}
IAssistProcessor *DocumentContentCompletionProvider::createProcessor(const AssistInterface *) const
{
return new DocumentContentCompletionProcessor(m_snippetGroup);
}
DocumentContentCompletionProcessor::DocumentContentCompletionProcessor(const QString &snippetGroupId)
: m_snippetGroup(snippetGroupId)
{ }
DocumentContentCompletionProcessor::~DocumentContentCompletionProcessor()
{
cancel();
}
static void createProposal(QFutureInterface<QStringList> &future, const QString &text,
const QString &wordUnderCursor)
{
const QRegularExpression wordRE("([\\p{L}_][\\p{L}0-9_]{2,})");
QSet<QString> words;
QRegularExpressionMatchIterator it = wordRE.globalMatch(text);
int wordUnderCursorFound = 0;
while (it.hasNext()) {
if (future.isCanceled())
return;
QRegularExpressionMatch match = it.next();
const QString &word = match.captured();
if (word == wordUnderCursor) {
// Only add the word under cursor if it
// already appears elsewhere in the text
if (++wordUnderCursorFound < 2)
continue;
}
if (!words.contains(word))
words.insert(word);
}
future.reportResult(Utils::toList(words));
}
IAssistProposal *DocumentContentCompletionProcessor::perform(const AssistInterface *interface)
{
QScopedPointer<const AssistInterface> assistInterface(interface);
if (running())
return nullptr;
int pos = interface->position();
QChar chr;
// Skip to the start of a name
do {
chr = interface->characterAt(--pos);
} while (chr.isLetterOrNumber() || chr == '_');
++pos;
int length = interface->position() - pos;
if (interface->reason() == IdleEditor) {
QChar characterUnderCursor = interface->characterAt(interface->position());
if (characterUnderCursor.isLetterOrNumber()
|| length < TextEditorSettings::completionSettings().m_characterThreshold) {
return nullptr;
}
}
const QString wordUnderCursor = interface->textAt(pos, length);
const QString text = interface->textDocument()->toPlainText();
m_watcher.setFuture(Utils::runAsync(&createProposal, text, wordUnderCursor));
QObject::connect(&m_watcher, &QFutureWatcher<QStringList>::resultReadyAt,
&m_watcher, [this, pos](int index){
const TextEditor::SnippetAssistCollector snippetCollector(
m_snippetGroup, QIcon(":/texteditor/images/snippet.png"));
QList<AssistProposalItemInterface *> items = snippetCollector.collect();
for (const QString &word : m_watcher.resultAt(index)) {
auto item = new AssistProposalItem();
item->setText(word);
items.append(item);
}
setAsyncProposalAvailable(new GenericProposal(pos, items));
});
return nullptr;
}
void DocumentContentCompletionProcessor::cancel()
{
if (running())
m_watcher.cancel();
}
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