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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "cppvirtualfunctionassistprovider.h"
#include "cppeditor.h"
#include "cppeditorconstants.h"
#include "cppvirtualfunctionproposalitem.h"
#include <cplusplus/Icons.h>
#include <cplusplus/Overview.h>
#include <coreplugin/actionmanager/actionmanager.h>
#include <coreplugin/actionmanager/command.h>
#include <cpptools/functionutils.h>
#include <cpptools/symbolfinder.h>
#include <cpptools/typehierarchybuilder.h>
#include <texteditor/codeassist/basicproposalitemlistmodel.h>
#include <texteditor/codeassist/genericproposal.h>
#include <texteditor/codeassist/genericproposalwidget.h>
#include <texteditor/codeassist/iassistinterface.h>
#include <texteditor/codeassist/iassistprocessor.h>
#include <texteditor/codeassist/iassistproposal.h>
#include <texteditor/texteditorconstants.h>
#include <utils/qtcassert.h>
#include <utils/qtcoverride.h>
using namespace CPlusPlus;
using namespace CppEditor::Internal;
using namespace CppTools;
using namespace TextEditor;
/// Activate current item with the same shortcut that is configured for Follow Symbol Under Cursor.
/// This is limited to single-key shortcuts without modifiers.
class VirtualFunctionProposalWidget : public GenericProposalWidget
{
public:
VirtualFunctionProposalWidget(bool openInSplit)
{
const char *id = openInSplit
? TextEditor::Constants::FOLLOW_SYMBOL_UNDER_CURSOR_IN_NEXT_SPLIT
: TextEditor::Constants::FOLLOW_SYMBOL_UNDER_CURSOR;
if (Core::Command *command = Core::ActionManager::command(id))
m_sequence = command->keySequence();
}
protected:
bool eventFilter(QObject *o, QEvent *e)
{
if (e->type() == QEvent::ShortcutOverride && m_sequence.count() == 1) {
QKeyEvent *ke = static_cast<QKeyEvent *>(e);
const QKeySequence seq(ke->key());
if (seq == m_sequence) {
activateCurrentProposalItem();
e->accept();
return true;
}
}
return GenericProposalWidget::eventFilter(o, e);
}
void showProposal(const QString &prefix) QTC_OVERRIDE
{
IGenericProposalModel *proposalModel = model();
if (proposalModel && proposalModel->size() == 1) {
emit proposalItemActivated(proposalModel->proposalItem(0));
deleteLater();
return;
}
GenericProposalWidget::showProposal(prefix);
}
private:
QKeySequence m_sequence;
};
class VirtualFunctionProposal : public GenericProposal
{
public:
VirtualFunctionProposal(int cursorPos, IGenericProposalModel *model, bool openInSplit)
: GenericProposal(cursorPos, model)
, m_openInSplit(openInSplit)
{}
bool isFragile() const QTC_OVERRIDE { return true; }
IAssistProposalWidget *createWidget() const QTC_OVERRIDE
{ return new VirtualFunctionProposalWidget(m_openInSplit); }
private:
bool m_openInSplit;
};
class VirtualFunctionsAssistProcessor : public IAssistProcessor
{
public:
VirtualFunctionsAssistProcessor(const VirtualFunctionAssistProvider::Parameters ¶ms)
: m_params(params)
{}
IAssistProposal *immediateProposal(const TextEditor::IAssistInterface *) QTC_OVERRIDE
{
QTC_ASSERT(m_params.function, return 0);
BasicProposalItem *hintItem = new VirtualFunctionProposalItem(CPPEditorWidget::Link());
hintItem->setText(QCoreApplication::translate("VirtualFunctionsAssistProcessor",
"...searching overrides"));
hintItem->setOrder(-1000);
QList<BasicProposalItem *> items;
items << itemFromFunction(m_params.function);
items << hintItem;
return new VirtualFunctionProposal(m_params.cursorPosition,
new BasicProposalItemListModel(items),
m_params.openInNextSplit);
}
IAssistProposal *perform(const IAssistInterface *) QTC_OVERRIDE
{
QTC_ASSERT(m_params.function, return 0);
QTC_ASSERT(m_params.staticClass, return 0);
QTC_ASSERT(!m_params.snapshot.isEmpty(), return 0);
Class *functionsClass = m_finder.findMatchingClassDeclaration(m_params.function,
m_params.snapshot);
if (!functionsClass)
return 0;
const QList<Function *> overrides = FunctionUtils::overrides(
m_params.function, functionsClass, m_params.staticClass, m_params.snapshot);
if (overrides.isEmpty())
return 0;
QList<BasicProposalItem *> items;
foreach (Function *func, overrides)
items << itemFromFunction(func);
items.first()->setOrder(1000); // Ensure top position for function of static type
return new VirtualFunctionProposal(m_params.cursorPosition,
new BasicProposalItemListModel(items),
m_params.openInNextSplit);
}
private:
Function *maybeDefinitionFor(Function *func) const
{
if (Function *definition = m_finder.findMatchingDefinition(func, m_params.snapshot))
return definition;
return func;
}
BasicProposalItem *itemFromFunction(Function *func) const
{
const CPPEditorWidget::Link link = CPPEditorWidget::linkToSymbol(maybeDefinitionFor(func));
QString text = m_overview.prettyName(LookupContext::fullyQualifiedName(func));
if (func->isPureVirtual())
text += QLatin1String(" = 0");
BasicProposalItem *item = new VirtualFunctionProposalItem(link, m_params.openInNextSplit);
item->setText(text);
item->setIcon(m_icons.iconForSymbol(func));
return item;
}
VirtualFunctionAssistProvider::Parameters m_params;
Overview m_overview;
Icons m_icons;
mutable CppTools::SymbolFinder m_finder;
};
VirtualFunctionAssistProvider::VirtualFunctionAssistProvider()
{
}
bool VirtualFunctionAssistProvider::configure(const Parameters ¶meters)
{
m_params = parameters;
return true;
}
bool VirtualFunctionAssistProvider::isAsynchronous() const
{
return true;
}
bool VirtualFunctionAssistProvider::supportsEditor(Core::Id editorId) const
{
return editorId == CppEditor::Constants::CPPEDITOR_ID;
}
IAssistProcessor *VirtualFunctionAssistProvider::createProcessor() const
{
return new VirtualFunctionsAssistProcessor(m_params);
}
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