RedPanda-CPP/RedPandaIDE/widgets/codecompletionpopup.cpp

/*
 * Copyright (C) 2020-2022 Roy Qu (royqh1979@gmail.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
#include "codecompletionpopup.h"
#include "../utils.h"
#include "../mainwindow.h"
#include "../editor.h"
#include "../editorlist.h"
#include "../symbolusagemanager.h"
#include "../colorscheme.h"

#include <QKeyEvent>
#include <QVBoxLayout>
#include <QDebug>
#include <QApplication>

CodeCompletionPopup::CodeCompletionPopup(QWidget *parent) :
    QWidget(parent)
{
    setWindowFlags(Qt::Popup);
    mListView = new CodeCompletionListView(this);
    mModel=new CodeCompletionListModel(&mCompletionStatementList);
    mModel->setColorCallback([this](PStatement statement)->QColor{
        StatementKind kind;
        if (mParser) {
            kind = mParser->getKindOfStatement(statement);
        } else {
            kind = statement->kind;
        }
        PColorSchemeItem item = mColors->value(kind,PColorSchemeItem());
        if (item) {
            return item->foreground();
        }
        return palette().color(QPalette::Text);
    });
    mListView->setModel(mModel);
    setLayout(new QVBoxLayout());
    layout()->addWidget(mListView);
    layout()->setMargin(0);

    mShowKeywords=true;
    mUseCppKeyword=true;
    mRecordUsage = false;
    mSortByScope = true;

    mOnlyGlobals = false;
    mShowCount = 1000;
    mShowCodeSnippets = true;

    mIgnoreCase = false;
}

CodeCompletionPopup::~CodeCompletionPopup()
{
    delete mListView;
    delete mModel;
}

void CodeCompletionPopup::setKeypressedCallback(const KeyPressedCallback &newKeypressedCallback)
{
    mListView->setKeypressedCallback(newKeypressedCallback);
}

void CodeCompletionPopup::prepareSearch(
        const QString &preWord,
        const QStringList &ownerExpression,
        const QString& memberOperator,
        const QStringList& memberExpression,
        const QString &filename,
        int line)
{
    QMutexLocker locker(&mMutex);
    if (!isEnabled())
        return;
    //Screen.Cursor := crHourglass;
    QCursor oldCursor = cursor();
    setCursor(Qt::CursorShape::WaitCursor);

    mMemberPhrase = memberExpression.join("");
    mMemberOperator = memberOperator;
    if (preWord.isEmpty()) {
        mIncludedFiles = mParser->getFileIncludes(filename);
        getCompletionFor(ownerExpression,memberOperator,memberExpression, filename,line);
    } else {
        getCompletionListForPreWord(preWord);
    }

    setCursor(oldCursor);
}

bool CodeCompletionPopup::search(const QString &memberPhrase, bool autoHideOnSingleResult)
{
    QMutexLocker locker(&mMutex);

    mMemberPhrase = memberPhrase;

    if (!isEnabled()) {
        hide();
        return false;
    }

    QCursor oldCursor = cursor();
    setCursor(Qt::CursorShape::WaitCursor);

    // filter fFullCompletionStatementList to fCompletionStatementList
    filterList(memberPhrase);

    //if can't find a destructor, maybe '~' is only an operator
//    if (mCompletionStatementList.isEmpty() && phrase.startsWith('~')) {
//        symbol = phrase.mid(1);
//        filterList(symbol);
//    }

    mModel->notifyUpdated();
    setCursor(oldCursor);

    if (!mCompletionStatementList.isEmpty()) {
        mListView->setCurrentIndex(mModel->index(0,0));
        // if only one suggestion, and is exactly the symbol to search, hide the frame (the search is over)
        // if only one suggestion and auto hide , don't show the frame
        if(mCompletionStatementList.count() == 1)
            if (autoHideOnSingleResult
                    || (memberPhrase == mCompletionStatementList.front()->command)) {
            return true;
        }
    } else {
        hide();
    }
    return false;
}

PStatement CodeCompletionPopup::selectedStatement()
{
    if (isEnabled()) {
        int index = mListView->currentIndex().row();
        if (mListView->currentIndex().isValid()
                && (index<mCompletionStatementList.count()) ) {
            return mCompletionStatementList[index];
        } else {
            if (!mCompletionStatementList.isEmpty())
                return mCompletionStatementList.front();
            else
                return PStatement();
        }
    } else
        return PStatement();
}

void CodeCompletionPopup::addChildren(PStatement scopeStatement, const QString &fileName, int line)
{
    if (scopeStatement && !isIncluded(scopeStatement->fileName)
      && !isIncluded(scopeStatement->definitionFileName))
        return;
    const StatementMap& children = mParser->statementList().childrenStatements(scopeStatement);
    if (children.isEmpty())
        return;

    if (!scopeStatement) { //Global scope
        for (const PStatement& childStatement: children) {
            if (childStatement->fileName.isEmpty()) {
                // hard defines
                addStatement(childStatement,fileName,-1);
            } else if (!( childStatement->kind == StatementKind::skConstructor
                          || childStatement->kind == StatementKind::skDestructor
                          || childStatement->kind == StatementKind::skBlock)
                       && (!mAddedStatements.contains(childStatement->command))
                       && (
                           isIncluded(childStatement->fileName)
                           || isIncluded(childStatement->definitionFileName)
                           )
                       ) {
                //we must check if the statement is included by the file
                addStatement(childStatement,fileName,line);
            }
        }
    } else {
        for (const PStatement& childStatement: children) {
            if (!( childStatement->kind == StatementKind::skConstructor
                                      || childStatement->kind == StatementKind::skDestructor
                                      || childStatement->kind == StatementKind::skBlock)
                                   && (!mAddedStatements.contains(childStatement->command)))
                addStatement(childStatement,fileName,line);
        }
    }
}

void CodeCompletionPopup::addStatement(PStatement statement, const QString &fileName, int line)
{
    if (mAddedStatements.contains(statement->command))
        return;
    if ((line!=-1)
            && (line < statement->line)
            && (fileName == statement->fileName))
        return;
    mAddedStatements.insert(statement->command);
    mFullCompletionStatementList.append(statement);
}

static bool nameComparator(PStatement statement1,PStatement statement2) {
    if (statement1->caseMatch && !statement2->caseMatch) {
        return true;
    } else if (!statement1->caseMatch && statement2->caseMatch) {
        return false;
    } else
        return statement1->command < statement2->command;
}

static bool defaultComparator(PStatement statement1,PStatement statement2) {
    // Show user template first
    if (statement1->kind == StatementKind::skUserCodeSnippet) {
        if (statement2->kind != StatementKind::skUserCodeSnippet)
            return true;
        else
            return statement1->command < statement2->command;
    } else if (statement2->kind == StatementKind::skUserCodeSnippet) {
        return false;
        // show keywords first
    } else if ((statement1->kind == StatementKind::skKeyword)
               && (statement2->kind != StatementKind::skKeyword)) {
        return true;
    } else if ((statement1->kind != StatementKind::skKeyword)
               && (statement2->kind == StatementKind::skKeyword)) {
        return false;
    } else
        return nameComparator(statement1,statement2);
}

static bool sortByScopeComparator(PStatement statement1,PStatement statement2){
    // Show user template first
    if (statement1->kind == StatementKind::skUserCodeSnippet) {
        if (statement2->kind != StatementKind::skUserCodeSnippet)
            return true;
        else
            return statement1->command < statement2->command;
    } else if (statement2->kind == StatementKind::skUserCodeSnippet) {
        return false;
        // show keywords first
    } else if (statement1->kind == StatementKind::skKeyword) {
        if (statement2->kind != StatementKind::skKeyword)
            return true;
        else
            return statement1->command < statement2->command;
    } else if (statement2->kind == StatementKind::skKeyword) {
        return false;
        // Show stuff from local headers first
    } else if (!(statement1->inSystemHeader) && statement2->inSystemHeader) {
        return true;
    } else if (statement1->inSystemHeader && !(statement2->inSystemHeader)) {
        return false;
        // Show local statements first
    } else if (statement1->scope != StatementScope::ssGlobal
               && statement2->scope == StatementScope::ssGlobal ) {
        return true;
    } else if (statement1->scope == StatementScope::ssGlobal
               && statement2->scope != StatementScope::ssGlobal ) {
        return false;
    } else
        return nameComparator(statement1,statement2);
}

static bool sortWithUsageComparator(PStatement statement1,PStatement statement2) {
    // Show user template first
    if (statement1->kind == StatementKind::skUserCodeSnippet) {
        if (statement2->kind != StatementKind::skUserCodeSnippet)
            return true;
        else
            return statement1->command < statement2->command;
    } else if (statement2->kind == StatementKind::skUserCodeSnippet) {
        return false;
        //show most freq first
    } else if (statement1->freqTop > statement2->freqTop) {
        return true;
    } else if (statement1->freqTop < statement2->freqTop) {
        return false;
        // show keywords first
    } else if ((statement1->kind != StatementKind::skKeyword)
               && (statement2->kind == StatementKind::skKeyword)) {
        return true;
    } else if ((statement1->kind == StatementKind::skKeyword)
               && (statement2->kind != StatementKind::skKeyword)) {
        return false;
    } else
        return nameComparator(statement1,statement2);
}

static bool sortByScopeWithUsageComparator(PStatement statement1,PStatement statement2){
    // Show user template first
    if (statement1->kind == StatementKind::skUserCodeSnippet) {
        if (statement2->kind != StatementKind::skUserCodeSnippet)
            return true;
        else
            return statement1->command < statement2->command;
    } else if (statement2->kind == StatementKind::skUserCodeSnippet) {
        return false;
        //show most freq first
    } else if (statement1->freqTop > statement2->freqTop) {
        return true;
    } else if (statement1->freqTop < statement2->freqTop) {
        return false;
        // show keywords first
    } else if (statement1->kind == StatementKind::skKeyword) {
        if (statement2->kind != StatementKind::skKeyword)
            return true;
        else
            return statement1->command < statement2->command;
    } else if (statement2->kind == StatementKind::skKeyword) {
        return false;
        // Show stuff from local headers first
    } else if (statement1->inSystemHeader && ! (statement2->inSystemHeader)) {
        return true;
    } else if (!(statement1->inSystemHeader) && statement2->inSystemHeader) {
        return false;
        // Show local statements first
    } else if (statement1->scope != StatementScope::ssGlobal
               && statement2->scope == StatementScope::ssGlobal ) {
        return true;
    } else if (statement1->scope == StatementScope::ssGlobal
               && statement2->scope != StatementScope::ssGlobal ) {
        return false;
    } else
        return nameComparator(statement1,statement2);
}

void CodeCompletionPopup::filterList(const QString &member)
{
    QMutexLocker locker(&mMutex);
    mCompletionStatementList.clear();
    if (!mParser)
        return;
    if (!mParser->enabled())
        return;
    //we don't need to freeze here since we use smart pointers
    //  and data have been retrieved from the parser
//    if (!mParser->freeze())
//        return;
//    {
//        auto action = finally([this]{
//            mParser->unFreeze();
//        });
//        if (mParserSerialId!=mParser->serialId()) {
//            return;
//        }

    mCompletionStatementList.clear();
    if (!member.isEmpty()) { // filter
        mCompletionStatementList.reserve(mFullCompletionStatementList.size());
        foreach (const PStatement& statement, mFullCompletionStatementList) {
            Qt::CaseSensitivity cs = (mIgnoreCase?
                                          Qt::CaseInsensitive:
                                          Qt::CaseSensitive);
            if (statement->command.startsWith(member, cs)) {
                if (mIgnoreCase) {
                    statement->caseMatch =
                            statement->command.startsWith(
                                member,Qt::CaseSensitive);
                } else {
                    statement->caseMatch = true;
                }
                mCompletionStatementList.append(statement);
            }
        }
    } else
        mCompletionStatementList.append(mFullCompletionStatementList);
    if (mRecordUsage) {
        int topCount = 0;
        int secondCount = 0;
        int thirdCount = 0;
        int usageCount;
        foreach (const PStatement& statement,mCompletionStatementList) {
            if (statement->usageCount == -1) {
                PSymbolUsage usage = pMainWindow->symbolUsageManager()->findUsage(statement->fullName);
                if (usage) {
                    usageCount = usage->count;
                } else {
                    usageCount = 0;
                }
                statement->usageCount = usageCount;
            } else
                usageCount = statement->usageCount;
            if (usageCount>topCount) {
                thirdCount = secondCount;
                secondCount = topCount;
                topCount = usageCount;
            } else if (usageCount == topCount) {
                continue;
            } else if (usageCount > secondCount) {
                thirdCount = secondCount;
                secondCount = usageCount;
            } else if (usageCount == secondCount) {
                continue;
            } else if (usageCount>thirdCount) {
                thirdCount = usageCount;
            }
        }
        foreach (const PStatement& statement, mCompletionStatementList) {
            if (statement->usageCount == 0) {
                statement->freqTop = 0;
            } else if  (statement->usageCount == topCount) {
                statement->freqTop = 30;
            } else if  (statement->usageCount == secondCount) {
                statement->freqTop = 20;
            } else if  (statement->usageCount == thirdCount) {
                statement->freqTop = 10;
            }
        }
        if (mSortByScope) {
            std::sort(mCompletionStatementList.begin(),
                      mCompletionStatementList.end(),
                      sortByScopeWithUsageComparator);
        } else {
            std::sort(mCompletionStatementList.begin(),
                      mCompletionStatementList.end(),
                      sortWithUsageComparator);
        }
    } else if (mSortByScope) {
        std::sort(mCompletionStatementList.begin(),
                  mCompletionStatementList.end(),
                  sortByScopeComparator);
    } else {
        std::sort(mCompletionStatementList.begin(),
                  mCompletionStatementList.end(),
                  defaultComparator);
    }
    //    }
}

void CodeCompletionPopup::getCompletionFor(
        const QStringList &ownerExpression,
        const QString& memberOperator,
        const QStringList& memberExpression,
        const QString &fileName,
        int line)
{
    if(!mParser)
        return;
    if (!mParser->enabled())
        return;
    if (memberOperator.isEmpty() && ownerExpression.isEmpty() && memberExpression.isEmpty())
        return;

    if (!mParser->freeze())
        return;
    {
        auto action = finally([this]{
            mParser->unFreeze();
        });

        if (memberOperator.isEmpty()) {
            //C++ preprocessor directives
            if (mMemberPhrase.startsWith('#')) {
                if (mShowKeywords) {
                    foreach (const QString& keyword, CppDirectives) {
                        addKeyword(keyword);
                    }
                }
                return;
            }

            //docstring tags (javadoc style)
            if (mMemberPhrase.startsWith('@')) {
                if (mShowKeywords) {
                    foreach (const QString& keyword,JavadocTags) {
                        addKeyword(keyword);
                    }
                }
                return;
            }

            //the identifier to be completed is not a member of variable/class
            if (mShowCodeSnippets) {
                //add custom code templates
                foreach (const PCodeSnippet& codeIn,mCodeSnippets) {
                    if (!codeIn->code.isEmpty()) {
                        PStatement statement = std::make_shared<Statement>();
                        statement->command = codeIn->prefix;
                        statement->value = codeIn->code;
                        statement->kind = StatementKind::skUserCodeSnippet;
                        statement->fullName = codeIn->prefix;
                        statement->usageCount = 0;
                        statement->freqTop = 0;
                        mFullCompletionStatementList.append(statement);
                    }
                }
            }

            if (mShowKeywords) {
                //add keywords
                if (mUseCppKeyword) {
                    foreach (const QString& keyword,CppKeywords.keys()) {
                        addKeyword(keyword);
                    }
                } else {
                    foreach (const QString& keyword,CKeywords) {
                        addKeyword(keyword);
                    }
                }
            }

            PStatement scopeStatement = mCurrentStatement;
            // repeat until reach global
            while (scopeStatement) {
                //add members of current scope that not added before
                if (scopeStatement->kind == StatementKind::skClass) {
                    addChildren(scopeStatement, fileName, -1);
                } else {
                    addChildren(scopeStatement, fileName, line);
                }

                // add members of all usings (in current scope ) and not added before
                foreach (const QString& namespaceName,scopeStatement->usingList) {
                    PStatementList namespaceStatementsList =
                            mParser->findNamespace(namespaceName);
                    if (!namespaceStatementsList)
                        continue;
                    foreach (const PStatement& namespaceStatement,*namespaceStatementsList) {
                        addChildren(namespaceStatement, fileName, line);
                    }
                }
                scopeStatement=scopeStatement->parentScope.lock();
            }

            // add all global members and not added before
            addChildren(nullptr, fileName, line);

            // add members of all fusings
            mUsings = mParser->getFileUsings(fileName);
            foreach (const QString& namespaceName, mUsings) {
                PStatementList namespaceStatementsList =
                        mParser->findNamespace(namespaceName);
                if (!namespaceStatementsList)
                    continue;
                foreach (const PStatement& namespaceStatement, *namespaceStatementsList) {
                    addChildren(namespaceStatement, fileName, line);
                }
            }

        } else {
            //the identifier to be completed is a member of variable/class
            if (memberOperator == "::" && ownerExpression.isEmpty()) {
                // start with '::', we only find in global
                // add all global members and not added before
                addChildren(nullptr, fileName, line);
                return;
            }
            if (memberExpression.length()==2 && memberExpression.front()!="~")
                return;
            if (memberExpression.length()>2)
                return;

            PStatement scope = mCurrentStatement;//the scope the expression in
            PStatement parentTypeStatement;
//            QString scopeName = ownerExpression.join("");
//            PStatement ownerStatement = mParser->findStatementOf(
//                        fileName,
//                        scopeName,
//                        mCurrentStatement,
//                        parentTypeStatement);
            PEvalStatement ownerStatement = mParser->evalExpression(fileName,
                                        ownerExpression,
                                        scope);
//            qDebug()<<scopeName;
//            qDebug()<<memberOperator;
//            qDebug()<<memberExpression;
            if(!ownerStatement  || !ownerStatement->effectiveTypeStatement) {
//                qDebug()<<"statement not found!";
                return;
            }
//            qDebug()<<"found: "<<ownerStatement->fullName;
            if (memberOperator == "::") {
                if (ownerStatement->kind==EvalStatementKind::Namespace) {
                    //there might be many statements corresponding to one namespace;
                    PStatementList namespaceStatementsList =
                            mParser->findNamespace(ownerStatement->baseType);
                    if (namespaceStatementsList) {
                        foreach (const PStatement& namespaceStatement, *namespaceStatementsList) {
                            addChildren(namespaceStatement, fileName, line);
                        }
                    }
                    return;
                }
            }

            // find the most inner scope statement that has a name (not a block)
            PStatement scopeTypeStatement = mCurrentStatement;
            while (scopeTypeStatement && !isScopeTypeKind(scopeTypeStatement->kind)) {
                scopeTypeStatement = scopeTypeStatement->parentScope.lock();
            }
            if (
                    (memberOperator != "::")
                    && (
                        ownerStatement->kind == EvalStatementKind::Variable)
                    ) {
                // Get type statement  of current (scope) statement
                PStatement classTypeStatement = ownerStatement->effectiveTypeStatement;

                if (!classTypeStatement)
                    return;
                //is a smart pointer
                if (STLPointers.contains(classTypeStatement->fullName)
                   && (memberOperator == "->"
                       || memberOperator == "->*")
                        && ownerStatement->baseStatement) {
                    QString typeName= mParser->findFirstTemplateParamOf(
                                fileName,
                                ownerStatement->baseStatement->type,
                                scope);
                    classTypeStatement = mParser->findTypeDefinitionOf(
                                fileName,
                                typeName,
                                scope);
                    if (!classTypeStatement)
                        return;
                }
                if (!isIncluded(classTypeStatement->fileName) &&
                    !isIncluded(classTypeStatement->definitionFileName))
                    return;
                if ((classTypeStatement == scopeTypeStatement) || (ownerStatement->effectiveTypeStatement->command == "this")) {
                    //we can use all members
                    addChildren(classTypeStatement,fileName,-1);
                } else { // we can only use public members
                    const StatementMap& children = mParser->statementList().childrenStatements(classTypeStatement);
                    if (children.isEmpty())
                        return;
                    foreach (const PStatement& childStatement, children) {
                        if ((childStatement->classScope==StatementClassScope::scsPublic)
                                && !(
                                    childStatement->kind == StatementKind::skConstructor
                                    || childStatement->kind == StatementKind::skDestructor)
                                && !mAddedStatements.contains(childStatement->command)) {
                            addStatement(childStatement,fileName,-1);
                        }
                    }
                }
            //todo friend
            } else if ((memberOperator == "::")
                       && (ownerStatement->kind == EvalStatementKind::Type)) {
                //we can add all child enum definess
                PStatement classTypeStatement = ownerStatement->effectiveTypeStatement;
                if (!classTypeStatement)
                    return;
                if (!isIncluded(classTypeStatement->fileName) &&
                    !isIncluded(classTypeStatement->definitionFileName))
                    return;
                if (classTypeStatement->kind == StatementKind::skEnumType
                        || classTypeStatement->kind == StatementKind::skEnumClassType) {
                    const StatementMap& children =
                            mParser->statementList().childrenStatements(classTypeStatement);
                    foreach (const PStatement& child,children) {
                        addStatement(child,fileName,line);
                    }
                } else {
                    //class
                    if (classTypeStatement == scopeTypeStatement) {
                        //we can use all static members
                        const StatementMap& children =
                                mParser->statementList().childrenStatements(classTypeStatement);
                        foreach (const PStatement& childStatement, children) {
                            if (
                              (childStatement->isStatic)
                               || (childStatement->kind == StatementKind::skTypedef
                                || childStatement->kind == StatementKind::skClass
                                || childStatement->kind == StatementKind::skEnum
                                || childStatement->kind == StatementKind::skEnumClassType
                                || childStatement->kind == StatementKind::skEnumType
                                   )) {
                                addStatement(childStatement,fileName,-1);
                            }
                        }
                    } else {
                        // we can only use public static members
                        const StatementMap& children =
                                mParser->statementList().childrenStatements(classTypeStatement);
                        foreach (const PStatement& childStatement,children) {
                            if (
                              (childStatement->isStatic)
                               || (childStatement->kind == StatementKind::skTypedef
                                || childStatement->kind == StatementKind::skClass
                                || childStatement->kind == StatementKind::skEnum
                                || childStatement->kind == StatementKind::skEnumClassType
                                || childStatement->kind == StatementKind::skEnumType
                                   )) {
                                if (childStatement->classScope == StatementClassScope::scsPublic)
                                    addStatement(childStatement,fileName,-1);
                            }
                        }
                    }
                }
            }
        }
    }
}

void CodeCompletionPopup::getCompletionListForPreWord(const QString &preWord)
{
    mFullCompletionStatementList.clear();
    if (preWord == "long") {
        addKeyword("long");
        addKeyword("double");
        addKeyword("int");
    } else if (preWord == "short") {
        addKeyword("int");
    } else if (preWord == "signed") {
        addKeyword("long");
        addKeyword("short");
        addKeyword("int");
        addKeyword("char");
    } else if (preWord == "unsigned") {
        addKeyword("long");
        addKeyword("short");
        addKeyword("int");
        addKeyword("char");
    }
}

void CodeCompletionPopup::addKeyword(const QString &keyword)
{
    PStatement statement = std::make_shared<Statement>();
    statement->command = keyword;
    statement->kind = StatementKind::skKeyword;
    statement->fullName = keyword;
    statement->usageCount = 0;
    statement->freqTop = 0;
    mFullCompletionStatementList.append(statement);
}

bool CodeCompletionPopup::isIncluded(const QString &fileName)
{
    return mIncludedFiles.contains(fileName);
}

const QString &CodeCompletionPopup::memberOperator() const
{
    return mMemberOperator;
}

const QList<PCodeSnippet> &CodeCompletionPopup::codeSnippets() const
{
    return mCodeSnippets;
}

void CodeCompletionPopup::setCodeSnippets(const QList<PCodeSnippet> &newCodeSnippets)
{
    mCodeSnippets = newCodeSnippets;
}

void CodeCompletionPopup::setColors(const std::shared_ptr<QHash<StatementKind, std::shared_ptr<ColorSchemeItem> > > &newColors)
{
    mColors = newColors;
}

const QString &CodeCompletionPopup::memberPhrase() const
{
    return mMemberPhrase;
}

void CodeCompletionPopup::showEvent(QShowEvent *)
{
    mListView->setFocus();
}

const PStatement &CodeCompletionPopup::currentStatement() const
{
    return mCurrentStatement;
}

void CodeCompletionPopup::setCurrentStatement(const PStatement &newCurrentStatement)
{
    mCurrentStatement = newCurrentStatement;
}

const std::shared_ptr<QHash<StatementKind, std::shared_ptr<ColorSchemeItem> > >& CodeCompletionPopup::colors() const
{
    return mColors;
}

bool CodeCompletionPopup::useCppKeyword() const
{
    return mUseCppKeyword;
}

void CodeCompletionPopup::setUseCppKeyword(bool newUseCppKeyword)
{
    mUseCppKeyword = newUseCppKeyword;
}

bool CodeCompletionPopup::sortByScope() const
{
    return mSortByScope;
}

void CodeCompletionPopup::setSortByScope(bool newSortByScope)
{
    mSortByScope = newSortByScope;
}

bool CodeCompletionPopup::ignoreCase() const
{
    return mIgnoreCase;
}

void CodeCompletionPopup::setIgnoreCase(bool newIgnoreCase)
{
    mIgnoreCase = newIgnoreCase;
}

bool CodeCompletionPopup::showCodeSnippets() const
{
    return mShowCodeSnippets;
}

void CodeCompletionPopup::setShowCodeSnippets(bool newShowCodeIns)
{
    mShowCodeSnippets = newShowCodeIns;
}

bool CodeCompletionPopup::showKeywords() const
{
    return mShowKeywords;
}

void CodeCompletionPopup::setShowKeywords(bool newShowKeywords)
{
    mShowKeywords = newShowKeywords;
}

bool CodeCompletionPopup::recordUsage() const
{
    return mRecordUsage;
}

void CodeCompletionPopup::setRecordUsage(bool newRecordUsage)
{
    mRecordUsage = newRecordUsage;
}

bool CodeCompletionPopup::onlyGlobals() const
{
    return mOnlyGlobals;
}

void CodeCompletionPopup::setOnlyGlobals(bool newOnlyGlobals)
{
    mOnlyGlobals = newOnlyGlobals;
}

int CodeCompletionPopup::showCount() const
{
    return mShowCount;
}

void CodeCompletionPopup::setShowCount(int newShowCount)
{
    mShowCount = newShowCount;
}

const PCppParser &CodeCompletionPopup::parser() const
{
    return mParser;
}

void CodeCompletionPopup::setParser(const PCppParser &newParser)
{
    mParser = newParser;
}

void CodeCompletionPopup::hideEvent(QHideEvent *event)
{
    QMutexLocker locker(&mMutex);
    mListView->setKeypressedCallback(nullptr);
    mCompletionStatementList.clear();
    mFullCompletionStatementList.clear();
    mIncludedFiles.clear();
    mUsings.clear();
    mAddedStatements.clear();
    mParser = nullptr;
    QWidget::hideEvent(event);
}

bool CodeCompletionPopup::event(QEvent *event)
{
    bool result = QWidget::event(event);
    if (event->type() == QEvent::FontChange) {
          mListView->setFont(font());
    }
    return result;
}

CodeCompletionListModel::CodeCompletionListModel(const StatementList *statements, QObject *parent):
    QAbstractListModel(parent),
    mStatements(statements)
{

}

int CodeCompletionListModel::rowCount(const QModelIndex &) const
{
    return mStatements->count();
}

QVariant CodeCompletionListModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid())
        return QVariant();
    if (index.row()>=mStatements->count())
        return QVariant();

    switch(role) {
    case Qt::DisplayRole: {
        PStatement statement = mStatements->at(index.row());
        return statement->command;
        }
    case Qt::ForegroundRole: {
        PStatement statement = mStatements->at(index.row());
        if (mColorCallback)
            return mColorCallback(statement);
        return qApp->palette().color(QPalette::Text);
    }
    }
    return QVariant();
}

void CodeCompletionListModel::notifyUpdated()
{
    beginResetModel();
    endResetModel();
}

const ColorCallback &CodeCompletionListModel::colorCallback() const
{
    return mColorCallback;
}

void CodeCompletionListModel::setColorCallback(const ColorCallback &newColorCallback)
{
    mColorCallback = newColorCallback;
}