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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "clangdmemoryusagewidget.h"
#include "clangcodemodeltr.h"
#include "clangdclient.h"
#include <languageserverprotocol/jsonobject.h>
#include <utils/itemviews.h>
#include <utils/treemodel.h>
#include <QHeaderView>
#include <QMenu>
#include <QPointer>
#include <QVBoxLayout>
using namespace LanguageServerProtocol;
using namespace Utils;
namespace ClangCodeModel::Internal {
class MemoryTree : public JsonObject
{
public:
using JsonObject::JsonObject;
// number of bytes used, including child components
qint64 total() const { return qint64(typedValue<double>(totalKey())); }
// number of bytes used, excluding child components
qint64 self() const { return qint64(typedValue<double>(selfKey())); }
// named child components
using NamedComponent = std::pair<MemoryTree, QString>;
QList<NamedComponent> children() const
{
QList<NamedComponent> components;
const auto obj = operator const QJsonObject &();
for (auto it = obj.begin(); it != obj.end(); ++it) {
if (it.key() == totalKey() || it.key() == selfKey())
continue;
components.push_back({MemoryTree(it.value()), it.key()});
}
return components;
}
private:
static QString totalKey() { return QLatin1String("_total"); }
static QString selfKey() { return QLatin1String("_self"); }
};
class MemoryTreeItem : public TreeItem
{
public:
MemoryTreeItem(const QString &displayName, const MemoryTree &tree)
: m_displayName(displayName), m_bytesUsed(tree.total())
{
for (const MemoryTree::NamedComponent &component : tree.children())
appendChild(new MemoryTreeItem(component.second, component.first));
}
private:
QVariant data(int column, int role) const override
{
switch (role) {
case Qt::DisplayRole:
if (column == 0)
return m_displayName;
return memString();
case Qt::TextAlignmentRole:
if (column == 1)
return Qt::AlignRight;
break;
default:
break;
}
return {};
}
QString memString() const
{
static const QList<std::pair<int, QString>> factors{{1000000000, "GB"},
{1000000, "MB"},
{1000, "KB"}};
for (const auto &factor : factors) {
if (m_bytesUsed > factor.first)
return QString::number(qint64(std::round(double(m_bytesUsed) / factor.first)))
+ ' ' + factor.second;
}
return QString::number(m_bytesUsed) + " B";
}
const QString m_displayName;
const qint64 m_bytesUsed;
};
class MemoryTreeModel : public BaseTreeModel
{
public:
MemoryTreeModel()
{
setHeader({Tr::tr("Component"), Tr::tr("Total Memory")});
}
void update(const MemoryTree &tree)
{
setRootItem(new MemoryTreeItem({}, tree));
}
};
class ClangdMemoryUsageWidget::Private
{
public:
Private(ClangdMemoryUsageWidget *q, ClangdClient *client) : q(q), client(client)
{
setupUi();
getMemoryTree();
}
void setupUi();
void getMemoryTree();
ClangdMemoryUsageWidget * const q;
const QPointer<ClangdClient> client;
MemoryTreeModel model;
TreeView view;
std::optional<MessageId> currentRequest;
};
ClangdMemoryUsageWidget::ClangdMemoryUsageWidget(ClangdClient *client)
: d(new Private(this, client))
{
}
ClangdMemoryUsageWidget::~ClangdMemoryUsageWidget()
{
if (d->client && d->currentRequest.has_value())
d->client->cancelRequest(d->currentRequest.value());
delete d;
}
void ClangdMemoryUsageWidget::Private::setupUi()
{
const auto layout = new QVBoxLayout(q);
view.setContextMenuPolicy(Qt::CustomContextMenu);
view.header()->setSectionResizeMode(QHeaderView::ResizeToContents);
view.header()->setStretchLastSection(false);
view.setModel(&model);
layout->addWidget(&view);
QObject::connect(&view, &QWidget::customContextMenuRequested, q, [this](const QPoint &pos) {
QMenu menu;
menu.addAction(Tr::tr("Update"), [this] { getMemoryTree(); });
menu.exec(view.mapToGlobal(pos));
});
}
void ClangdMemoryUsageWidget::Private::getMemoryTree()
{
Request<MemoryTree, std::nullptr_t, JsonObject> request("$/memoryUsage", {});
request.setResponseCallback([this](decltype(request)::Response response) {
currentRequest.reset();
qCDebug(clangdLog) << "received memory usage response";
if (const auto result = response.result())
model.update(*result);
});
qCDebug(clangdLog) << "sending memory usage request";
currentRequest = request.id();
client->sendMessage(request, ClangdClient::SendDocUpdates::Ignore);
}
} // namespace ClangCodeModel::Internal
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