QT creator源码分析 ----点击search后的动作

环境：源代码用的是qt-creator-opensource-src-3.4.1.tar.gz

此篇文章说明的的是在QT creator中，Ctrl+Shift+F，然后点击search后的动作

Ctrl+Shift+F，输入内容

点击search

在FindToolWindow的构造函数中

connect(m_ui.searchButton, SIGNAL(clicked()), this, SLOT(search()));

void FindToolWindow::search(){    QString term;    IFindFilter *filter = 0;    acceptAndGetParameters(&term, &filter);    QTC_ASSERT(filter, return);    filter->findAll(term, m_plugin->findFlags());//BaseFileFind继承自IFindFilter}

void BaseFileFind::findAll(const QString &txt, FindFlags findFlags){    runNewSearch(txt, findFlags, SearchResultWindow::SearchOnly);}

void BaseFileFind::runNewSearch(const QString &txt, FindFlags findFlags,                                    SearchResultWindow::SearchMode searchMode){    d->m_currentFindSupport = 0;    if (d->m_filterCombo)        updateComboEntries(d->m_filterCombo, true);    SearchResult *search = SearchResultWindow::instance()->startNewSearch(label(),                           toolTip().arg(IFindFilter::descriptionForFindFlags(findFlags)),                           txt, searchMode, SearchResultWindow::PreserveCaseEnabled,                           QString::fromLatin1("TextEditor")); //获取搜索框    search->setTextToReplace(txt);    search->setSearchAgainSupported(true);    FileFindParameters parameters;    parameters.text = txt;    parameters.flags = findFlags;    parameters.nameFilters = fileNameFilters();    parameters.additionalParameters = additionalParameters();    search->setUserData(qVariantFromValue(parameters));    connect(search, SIGNAL(activated(Core::SearchResultItem)), this, SLOT(openEditor(Core::SearchResultItem)));//用编辑器打开    if (searchMode == SearchResultWindow::SearchAndReplace) {        connect(search, SIGNAL(replaceButtonClicked(QString,QList<Core::SearchResultItem>,bool)),                this, SLOT(doReplace(QString,QList<Core::SearchResultItem>,bool)));//文本替换    }    connect(search, SIGNAL(visibilityChanged(bool)), this, SLOT(hideHighlightAll(bool)));    connect(search, SIGNAL(cancelled()), this, SLOT(cancel()));    connect(search, SIGNAL(paused(bool)), this, SLOT(setPaused(bool)));    connect(search, SIGNAL(searchAgainRequested()), this, SLOT(searchAgain()));//再次搜索    connect(this, SIGNAL(enabledChanged(bool)), search, SIGNAL(requestEnabledCheck()));    connect(search, SIGNAL(requestEnabledCheck()), this, SLOT(recheckEnabled()));    runSearch(search);}

void BaseFileFind::runSearch(SearchResult *search){    FileFindParameters parameters = search->userData().value<FileFindParameters>();    CountingLabel *label = new CountingLabel;    connect(search, SIGNAL(countChanged(int)), label, SLOT(updateCount(int)));    CountingLabel *statusLabel = new CountingLabel;    connect(search, SIGNAL(countChanged(int)), statusLabel, SLOT(updateCount(int)));//找到了新的搜索内容时更新条目信息    SearchResultWindow::instance()->popup(IOutputPane::Flags(IOutputPane::ModeSwitch|IOutputPane::WithFocus));    QFutureWatcher<FileSearchResultList> *watcher = new QFutureWatcher<FileSearchResultList>();    d->m_watchers.insert(watcher, search);    watcher->setPendingResultsLimit(1);    connect(watcher, SIGNAL(resultReadyAt(int)), this, SLOT(displayResult(int)));//显示搜索结果    connect(watcher, SIGNAL(finished()), this, SLOT(searchFinished()));    if (parameters.flags & FindRegularExpression) {        watcher->setFuture(Utils::findInFilesRegExp(parameters.text,            files(parameters.nameFilters, parameters.additionalParameters),            textDocumentFlagsForFindFlags(parameters.flags),            TextDocument::openedTextDocumentContents()));    } else {        watcher->setFuture(Utils::findInFiles(parameters.text,            files(parameters.nameFilters, parameters.additionalParameters),            textDocumentFlagsForFindFlags(parameters.flags),            TextDocument::openedTextDocumentContents()));    }    FutureProgress *progress =        ProgressManager::addTask(watcher->future(), tr("Searching"), Constants::TASK_SEARCH);    progress->setWidget(label);    progress->setStatusBarWidget(statusLabel);    connect(progress, SIGNAL(clicked()), search, SLOT(popup()));}

void BaseFileFind::displayResult(int index) {    QFutureWatcher<FileSearchResultList> *watcher =            static_cast<QFutureWatcher<FileSearchResultList> *>(sender());    SearchResult *search = d->m_watchers.value(watcher);    if (!search) {        // search was removed from search history while the search is running        watcher->cancel();        return;    }    FileSearchResultList results = watcher->resultAt(index);    QList<SearchResultItem> items;    foreach (const FileSearchResult &result, results) {        SearchResultItem item;        item.path = QStringList() << QDir::toNativeSeparators(result.fileName);        item.lineNumber = result.lineNumber;        item.text = result.matchingLine;        item.textMarkLength = result.matchLength;        item.textMarkPos = result.matchStart;        item.useTextEditorFont = true;        item.userData = result.regexpCapturedTexts;        items << item;    }    search->addResults(items, SearchResult::AddOrdered);//增加搜索结果}

void SearchResult::addResults(const QList<SearchResultItem> &items, AddMode mode){    m_widget->addResults(items, mode);    emit countChanged(m_widget->count());//发送信号变更统计的搜索条目}

↓↓双击打开编辑void BaseFileFind::openEditor(const SearchResultItem &item){    SearchResult *result = qobject_cast<SearchResult *>(sender());    IEditor *openedEditor = 0;    if (item.path.size() > 0) {        openedEditor = EditorManager::openEditorAt(QDir::fromNativeSeparators(item.path.first()),                                                   item.lineNumber,                                                   item.textMarkPos, Id(),                                                   EditorManager::DoNotSwitchToDesignMode);    } else {        openedEditor = EditorManager::openEditor(QDir::fromNativeSeparators(item.text));    }    if (d->m_currentFindSupport)        d->m_currentFindSupport->clearHighlights();    d->m_currentFindSupport = 0;    if (!openedEditor)        return;    // highlight results    if (IFindSupport *findSupport = Aggregation::query<IFindSupport>(openedEditor->widget())) {        if (result) {            FileFindParameters parameters = result->userData().value<FileFindParameters>();            d->m_currentFindSupport = findSupport;            d->m_currentFindSupport->highlightAll(parameters.text, parameters.flags);//在编辑框中高亮搜索内容        }    }}

void BaseTextFind::highlightAll(const QString &txt, FindFlags findFlags){    emit highlightAllRequested(txt, findFlags);}

在TextEditorWidgetPrivate::TextEditorWidgetPrivate(TextEditorWidget *parent)中    connect(baseTextFind, &BaseTextFind::highlightAllRequested,            this, &TextEditorWidgetPrivate::highlightSearchResultsSlot);

void TextEditorWidgetPrivate::highlightSearchResultsSlot(const QString &txt, FindFlags findFlags){    if (m_searchExpr.pattern() == txt)        return;    m_searchExpr.setPattern(txt);    m_searchExpr.setPatternSyntax((findFlags & FindRegularExpression) ?                                     QRegExp::RegExp : QRegExp::FixedString);    m_searchExpr.setCaseSensitivity((findFlags & FindCaseSensitively) ?                                       Qt::CaseSensitive : Qt::CaseInsensitive);    m_findFlags = findFlags;    m_delayedUpdateTimer.start(50);//刷新}