Advanced find (algorithms)

2025-06-05 21:59:17 +02:00 · 2020-01-03 18:11:03 +01:00
parent b490dc7c89
commit 54ea7dcb7d
12 changed files with 654 additions and 5 deletions
--- a/PdfForQtViewer/pdfadvancedfindwidget.cpp
+++ b/PdfForQtViewer/pdfadvancedfindwidget.cpp
@ -0,0 +1,126 @@
+//    Copyright (C) 2020 Jakub Melka
+//
+//    This file is part of PdfForQt.
+//
+//    PdfForQt is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    PdfForQt 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 Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDFForQt.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "pdfadvancedfindwidget.h"
+#include "ui_pdfadvancedfindwidget.h"
+
+#include "pdfcompiler.h"
+#include "pdfdocument.h"
+#include "pdfdrawspacecontroller.h"
+
+#include <QMessageBox>
+
+namespace pdfviewer
+{
+
+PDFAdvancedFindWidget::PDFAdvancedFindWidget(pdf::PDFDrawWidgetProxy* proxy, QWidget* parent) :
+    QWidget(parent),
+    ui(new Ui::PDFAdvancedFindWidget),
+    m_proxy(proxy),
+    m_document(nullptr)
+{
+    ui->setupUi(this);
+
+    connect(ui->regularExpressionsCheckbox, &QCheckBox::clicked, this, &PDFAdvancedFindWidget::updateUI);
+    connect(m_proxy, &pdf::PDFDrawWidgetProxy::textLayoutChanged, this, &PDFAdvancedFindWidget::performSearch);
+    updateUI();
+}
+
+PDFAdvancedFindWidget::~PDFAdvancedFindWidget()
+{
+    delete ui;
+}
+
+void PDFAdvancedFindWidget::setDocument(const pdf::PDFDocument* document)
+{
+    if (m_document != document)
+    {
+        m_document = document;
+        updateUI();
+    }
+}
+
+void PDFAdvancedFindWidget::on_searchButton_clicked()
+{
+    m_parameters.phrase = ui->searchPhraseEdit->text();
+    m_parameters.isCaseSensitive = ui->caseSensitiveCheckBox->isChecked();
+    m_parameters.isWholeWordsOnly = ui->wholeWordsOnlyCheckBox->isChecked();
+    m_parameters.isRegularExpression = ui->regularExpressionsCheckbox->isChecked();
+    m_parameters.isDotMatchingEverything = ui->dotMatchesEverythingCheckBox->isChecked();
+    m_parameters.isMultiline = ui->multilineMatchingCheckBox->isChecked();
+    m_parameters.isSearchFinished = m_parameters.phrase.isEmpty();
+
+    if (m_parameters.isSearchFinished)
+    {
+        // We have nothing to search for
+        return;
+    }
+
+    // Validate regular expression
+    if (m_parameters.isRegularExpression)
+    {
+        QRegularExpression expression(m_parameters.phrase);
+        if (!expression.isValid())
+        {
+            m_parameters.isSearchFinished = true;
+            const int patternErrorOffset = expression.patternErrorOffset();
+            QMessageBox::critical(this, tr("Search error"), tr("Search phrase regular expression has error '%1' near symbol %2.").arg(expression.errorString()).arg(patternErrorOffset));
+            ui->searchPhraseEdit->setFocus();
+            ui->searchPhraseEdit->setSelection(patternErrorOffset, 1);
+            return;
+        }
+    }
+
+    pdf::PDFAsynchronousTextLayoutCompiler* compiler = m_proxy->getTextLayoutCompiler();
+    if (compiler->isTextLayoutReady())
+    {
+        performSearch();
+    }
+    else
+    {
+        compiler->makeTextLayout();
+    }
+}
+
+void PDFAdvancedFindWidget::updateUI()
+{
+    const bool enableUI = m_document && m_document->getCatalog()->getPageCount() > 0;
+    const bool enableRegularExpressionUI = enableUI && ui->regularExpressionsCheckbox->isChecked();
+    ui->searchForGroupBox->setEnabled(enableUI);
+    ui->regularExpressionSettingsGroupBox->setEnabled(enableRegularExpressionUI);
+}
+
+void PDFAdvancedFindWidget::performSearch()
+{
+    if (m_parameters.isSearchFinished)
+    {
+        return;
+    }
+
+    m_parameters.isSearchFinished = true;
+
+    pdf::PDFAsynchronousTextLayoutCompiler* compiler = m_proxy->getTextLayoutCompiler();
+    if (!compiler->isTextLayoutReady())
+    {
+        // Text layout is not ready yet
+        return;
+    }
+
+
+}
+
+}   // namespace pdfviewer