File indexing completed on 2024-04-28 04:32:42

 /*
     SPDX-FileCopyrightText: 2013 Jon Mease <jon.mease@gmail.com>
 
     Work sponsored by the LiMux project of the city of Munich:
     SPDX-FileCopyrightText: 2017 Klarälvdalens Datakonsult AB a KDAB Group company <info@kdab.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "documentcommands_p.h"
 
 #include "annotations.h"
 #include "debug_p.h"
 #include "document_p.h"
 #include "form.h"
 #include "page.h"
 #include "page_p.h"
 #include "utils_p.h"
 
 #include <KLocalizedString>
 
 namespace Okular
 {
 void moveViewportIfBoundingRectNotFullyVisible(Okular::NormalizedRect boundingRect, DocumentPrivate *docPriv, int pageNumber)
 {
     const Rotation pageRotation = docPriv->m_parent->page(pageNumber)->rotation();
     const QTransform rotationMatrix = Okular::buildRotationMatrix(pageRotation);
     boundingRect.transform(rotationMatrix);
     if (!docPriv->isNormalizedRectangleFullyVisible(boundingRect, pageNumber)) {
         DocumentViewport searchViewport(pageNumber);
         searchViewport.rePos.enabled = true;
         searchViewport.rePos.normalizedX = (boundingRect.left + boundingRect.right) / 2.0;
         searchViewport.rePos.normalizedY = (boundingRect.top + boundingRect.bottom) / 2.0;
         docPriv->m_parent->setViewport(searchViewport, nullptr, true);
     }
 }
 
 Okular::NormalizedRect buildBoundingRectangleForButtons(const QList<Okular::FormFieldButton *> &formButtons)
 {
     // Initialize coordinates of the bounding rect
     double left = 1.0;
     double top = 1.0;
     double right = 0.0;
     double bottom = 0.0;
 
     for (const FormFieldButton *formButton : formButtons) {
         left = qMin<double>(left, formButton->rect().left);
         top = qMin<double>(top, formButton->rect().top);
         right = qMax<double>(right, formButton->rect().right);
         bottom = qMax<double>(bottom, formButton->rect().bottom);
     }
     Okular::NormalizedRect boundingRect(left, top, right, bottom);
     return boundingRect;
 }
 
 AddAnnotationCommand::AddAnnotationCommand(Okular::DocumentPrivate *docPriv, Okular::Annotation *annotation, int pageNumber)
     : m_docPriv(docPriv)
     , m_annotation(annotation)
     , m_pageNumber(pageNumber)
     , m_done(false)
 {
     setText(i18nc("Add an annotation to the page", "add annotation"));
 }
 
 AddAnnotationCommand::~AddAnnotationCommand()
 {
     if (!m_done) {
         delete m_annotation;
     }
 }
 
 void AddAnnotationCommand::undo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_annotation->boundingRectangle(), m_docPriv, m_pageNumber);
     m_docPriv->performRemovePageAnnotation(m_pageNumber, m_annotation);
     m_done = false;
 }
 
 void AddAnnotationCommand::redo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_annotation->boundingRectangle(), m_docPriv, m_pageNumber);
     m_docPriv->performAddPageAnnotation(m_pageNumber, m_annotation);
     m_done = true;
 }
 
 bool AddAnnotationCommand::refreshInternalPageReferences(const QVector<Okular::Page *> &newPagesVector)
 {
     if (m_done) {
         // We don't always update m_annotation because even if the annotation has been added to the document
         // it can have been removed later so the annotation pointer is stored inside a following RemoveAnnotationCommand
         // and thus doesn't need updating because it didn't change
         // because of the document reload
         auto a = newPagesVector[m_pageNumber]->annotation(m_annotation->uniqueName());
         if (a) {
             m_annotation = a;
         }
     }
 
     return true;
 }
 
 RemoveAnnotationCommand::RemoveAnnotationCommand(Okular::DocumentPrivate *doc, Okular::Annotation *annotation, int pageNumber)
     : m_docPriv(doc)
     , m_annotation(annotation)
     , m_pageNumber(pageNumber)
     , m_done(false)
 {
     setText(i18nc("Remove an annotation from the page", "remove annotation"));
 }
 
 RemoveAnnotationCommand::~RemoveAnnotationCommand()
 {
     if (m_done) {
         delete m_annotation;
     }
 }
 
 void RemoveAnnotationCommand::undo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_annotation->boundingRectangle(), m_docPriv, m_pageNumber);
     m_docPriv->performAddPageAnnotation(m_pageNumber, m_annotation);
     m_done = false;
 }
 
 void RemoveAnnotationCommand::redo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_annotation->boundingRectangle(), m_docPriv, m_pageNumber);
     m_docPriv->performRemovePageAnnotation(m_pageNumber, m_annotation);
     m_done = true;
 }
 
 bool RemoveAnnotationCommand::refreshInternalPageReferences(const QVector<Okular::Page *> &newPagesVector)
 {
     if (!m_done) {
         // We don't always update m_annotation because it can happen that the annotation remove has been undo
         // and that annotation addition has also been undone so the annotation pointer is stored inside
         // a previous AddAnnotationCommand and thus doesn't need updating because it didn't change
         // because of the document reload
         auto a = newPagesVector[m_pageNumber]->annotation(m_annotation->uniqueName());
         if (a) {
             m_annotation = a;
         }
     }
 
     return true;
 }
 
 ModifyAnnotationPropertiesCommand::ModifyAnnotationPropertiesCommand(DocumentPrivate *docPriv, Annotation *annotation, int pageNumber, const QDomNode &oldProperties, const QDomNode &newProperties)
     : m_docPriv(docPriv)
     , m_annotation(annotation)
     , m_pageNumber(pageNumber)
     , m_prevProperties(oldProperties)
     , m_newProperties(newProperties)
 {
     setText(i18nc("Modify an annotation's internal properties (Color, line-width, etc.)", "modify annotation properties"));
 }
 
 void ModifyAnnotationPropertiesCommand::undo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_annotation->boundingRectangle(), m_docPriv, m_pageNumber);
     m_annotation->setAnnotationProperties(m_prevProperties);
     m_docPriv->performModifyPageAnnotation(m_pageNumber, m_annotation, true);
 }
 
 void ModifyAnnotationPropertiesCommand::redo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_annotation->boundingRectangle(), m_docPriv, m_pageNumber);
     m_annotation->setAnnotationProperties(m_newProperties);
     m_docPriv->performModifyPageAnnotation(m_pageNumber, m_annotation, true);
 }
 
 bool ModifyAnnotationPropertiesCommand::refreshInternalPageReferences(const QVector<Okular::Page *> &newPagesVector)
 {
     // Same reason for not unconditionally updating m_annotation, the annotation pointer can be stored in an add/Remove command
     auto a = newPagesVector[m_pageNumber]->annotation(m_annotation->uniqueName());
     if (a) {
         m_annotation = a;
     }
 
     return true;
 }
 
 TranslateAnnotationCommand::TranslateAnnotationCommand(DocumentPrivate *docPriv, Annotation *annotation, int pageNumber, const Okular::NormalizedPoint &delta, bool completeDrag)
     : m_docPriv(docPriv)
     , m_annotation(annotation)
     , m_pageNumber(pageNumber)
     , m_delta(delta)
     , m_completeDrag(completeDrag)
 {
     setText(i18nc("Translate an annotation's position on the page", "translate annotation"));
 }
 
 void TranslateAnnotationCommand::undo()
 {
     moveViewportIfBoundingRectNotFullyVisible(translateBoundingRectangle(minusDelta()), m_docPriv, m_pageNumber);
     m_annotation->translate(minusDelta());
     m_docPriv->performModifyPageAnnotation(m_pageNumber, m_annotation, true);
 }
 
 void TranslateAnnotationCommand::redo()
 {
     moveViewportIfBoundingRectNotFullyVisible(translateBoundingRectangle(m_delta), m_docPriv, m_pageNumber);
     m_annotation->translate(m_delta);
     m_docPriv->performModifyPageAnnotation(m_pageNumber, m_annotation, true);
 }
 
 int TranslateAnnotationCommand::id() const
 {
     return 1;
 }
 
 bool TranslateAnnotationCommand::mergeWith(const QUndoCommand *uc)
 {
     TranslateAnnotationCommand *tuc = (TranslateAnnotationCommand *)uc;
 
     if (tuc->m_annotation != m_annotation) {
         return false;
     }
 
     if (m_completeDrag) {
         return false;
     }
     m_delta = Okular::NormalizedPoint(tuc->m_delta.x + m_delta.x, tuc->m_delta.y + m_delta.y);
     m_completeDrag = tuc->m_completeDrag;
     return true;
 }
 
 Okular::NormalizedPoint TranslateAnnotationCommand::minusDelta()
 {
     return Okular::NormalizedPoint(-m_delta.x, -m_delta.y);
 }
 
 Okular::NormalizedRect TranslateAnnotationCommand::translateBoundingRectangle(const Okular::NormalizedPoint &delta)
 {
     Okular::NormalizedRect annotBoundingRect = m_annotation->boundingRectangle();
     annotBoundingRect.left = annotBoundingRect.left + delta.x;
     annotBoundingRect.right = annotBoundingRect.right + delta.x;
     annotBoundingRect.top = annotBoundingRect.top + delta.y;
     annotBoundingRect.bottom = annotBoundingRect.bottom + delta.y;
 
     return annotBoundingRect;
 }
 
 bool TranslateAnnotationCommand::refreshInternalPageReferences(const QVector<Page *> &newPagesVector)
 {
     // Same reason for not unconditionally updating m_annotation, the annotation pointer can be stored in an add/Remove command
     auto a = newPagesVector[m_pageNumber]->annotation(m_annotation->uniqueName());
     if (a) {
         m_annotation = a;
     }
 
     return true;
 }
 
 AdjustAnnotationCommand::AdjustAnnotationCommand(Okular::DocumentPrivate *docPriv, Okular::Annotation *annotation, int pageNumber, const Okular::NormalizedPoint &delta1, const Okular::NormalizedPoint &delta2, bool completeDrag)
     : m_docPriv(docPriv)
     , m_annotation(annotation)
     , m_pageNumber(pageNumber)
     , m_delta1(delta1)
     , m_delta2(delta2)
     , m_completeDrag(completeDrag)
 {
     setText(i18nc("Change an annotation's size", "adjust annotation"));
 }
 
 void AdjustAnnotationCommand::undo()
 {
     const NormalizedPoint minusDelta1 = Okular::NormalizedPoint(-m_delta1.x, -m_delta1.y);
     const NormalizedPoint minusDelta2 = Okular::NormalizedPoint(-m_delta2.x, -m_delta2.y);
     moveViewportIfBoundingRectNotFullyVisible(adjustBoundingRectangle(minusDelta1, minusDelta2), m_docPriv, m_pageNumber);
     m_annotation->adjust(minusDelta1, minusDelta2);
     m_docPriv->performModifyPageAnnotation(m_pageNumber, m_annotation, true);
 }
 
 void AdjustAnnotationCommand::redo()
 {
     moveViewportIfBoundingRectNotFullyVisible(adjustBoundingRectangle(m_delta1, m_delta2), m_docPriv, m_pageNumber);
     m_annotation->adjust(m_delta1, m_delta2);
     m_docPriv->performModifyPageAnnotation(m_pageNumber, m_annotation, true);
 }
 
 int AdjustAnnotationCommand::id() const
 {
     return 5;
 }
 
 bool AdjustAnnotationCommand::mergeWith(const QUndoCommand *uc)
 {
     AdjustAnnotationCommand *tuc = (AdjustAnnotationCommand *)uc;
 
     if (tuc->m_annotation != m_annotation) {
         return false;
     }
 
     if (m_completeDrag) {
         return false;
     }
     m_delta1 = Okular::NormalizedPoint(tuc->m_delta1.x + m_delta1.x, tuc->m_delta1.y + m_delta1.y);
     m_delta2 = Okular::NormalizedPoint(tuc->m_delta2.x + m_delta2.x, tuc->m_delta2.y + m_delta2.y);
     m_completeDrag = tuc->m_completeDrag;
     return true;
 }
 
 Okular::NormalizedRect AdjustAnnotationCommand::adjustBoundingRectangle(const Okular::NormalizedPoint &delta1, const Okular::NormalizedPoint &delta2)
 {
     Okular::NormalizedRect annotBoundingRect = m_annotation->boundingRectangle();
     annotBoundingRect.left = annotBoundingRect.left + delta1.x;
     annotBoundingRect.right = annotBoundingRect.right + delta2.x;
     annotBoundingRect.top = annotBoundingRect.top + delta1.y;
     annotBoundingRect.bottom = annotBoundingRect.bottom + delta2.y;
 
     return annotBoundingRect;
 }
 
 bool AdjustAnnotationCommand::refreshInternalPageReferences(const QVector<Page *> &newPagesVector)
 {
     // Same reason for not unconditionally updating m_annotation, the annotation pointer can be stored in an add/Remove command
     auto a = newPagesVector[m_pageNumber]->annotation(m_annotation->uniqueName());
     if (a) {
         m_annotation = a;
     }
 
     return true;
 }
 
 EditTextCommand::EditTextCommand(const QString &newContents, int newCursorPos, const QString &prevContents, int prevCursorPos, int prevAnchorPos)
     : m_newContents(newContents)
     , m_newCursorPos(newCursorPos)
     , m_prevContents(prevContents)
     , m_prevCursorPos(prevCursorPos)
     , m_prevAnchorPos(prevAnchorPos)
 {
     setText(i18nc("Generic text edit command", "edit text"));
 
     //// Determine edit type
     // If There was a selection then edit was not a simple single character backspace, delete, or insert
     if (m_prevCursorPos != m_prevAnchorPos) {
         qCDebug(OkularCoreDebug) << "OtherEdit, selection";
         m_editType = OtherEdit;
     } else if (newContentsRightOfCursor() == oldContentsRightOfCursor() && newContentsLeftOfCursor() == oldContentsLeftOfCursor().left(oldContentsLeftOfCursor().length() - 1) &&
                QStringView {oldContentsLeftOfCursor()}.right(1) != QLatin1Char('\n')) {
         qCDebug(OkularCoreDebug) << "CharBackspace";
         m_editType = CharBackspace;
     } else if (newContentsLeftOfCursor() == oldContentsLeftOfCursor() && newContentsRightOfCursor() == oldContentsRightOfCursor().right(oldContentsRightOfCursor().length() - 1) &&
                QStringView {oldContentsRightOfCursor()}.left(1) != QLatin1Char('\n')) {
         qCDebug(OkularCoreDebug) << "CharDelete";
         m_editType = CharDelete;
     } else if (newContentsRightOfCursor() == oldContentsRightOfCursor() && newContentsLeftOfCursor().left(newContentsLeftOfCursor().length() - 1) == oldContentsLeftOfCursor() &&
                QStringView {newContentsLeftOfCursor()}.right(1) != QLatin1Char('\n')) {
         qCDebug(OkularCoreDebug) << "CharInsert";
         m_editType = CharInsert;
     } else {
         qCDebug(OkularCoreDebug) << "OtherEdit";
         m_editType = OtherEdit;
     }
 }
 
 bool EditTextCommand::mergeWith(const QUndoCommand *uc)
 {
     EditTextCommand *euc = (EditTextCommand *)uc;
 
     // Only attempt merge of euc into this if our new state matches euc's old state and
     // the editTypes match and are not type OtherEdit
     if (m_newContents == euc->m_prevContents && m_newCursorPos == euc->m_prevCursorPos && m_editType == euc->m_editType && m_editType != OtherEdit) {
         m_newContents = euc->m_newContents;
         m_newCursorPos = euc->m_newCursorPos;
         return true;
     }
     return false;
 }
 
 QString EditTextCommand::oldContentsLeftOfCursor()
 {
     return m_prevContents.left(m_prevCursorPos);
 }
 
 QString EditTextCommand::oldContentsRightOfCursor()
 {
     return m_prevContents.right(m_prevContents.length() - m_prevCursorPos);
 }
 
 QString EditTextCommand::newContentsLeftOfCursor()
 {
     return m_newContents.left(m_newCursorPos);
 }
 
 QString EditTextCommand::newContentsRightOfCursor()
 {
     return m_newContents.right(m_newContents.length() - m_newCursorPos);
 }
 
 EditAnnotationContentsCommand::EditAnnotationContentsCommand(DocumentPrivate *docPriv, Annotation *annotation, int pageNumber, const QString &newContents, int newCursorPos, const QString &prevContents, int prevCursorPos, int prevAnchorPos)
     : EditTextCommand(newContents, newCursorPos, prevContents, prevCursorPos, prevAnchorPos)
     , m_docPriv(docPriv)
     , m_annotation(annotation)
     , m_pageNumber(pageNumber)
 {
     setText(i18nc("Edit an annotation's text contents", "edit annotation contents"));
 }
 
 void EditAnnotationContentsCommand::undo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_annotation->boundingRectangle(), m_docPriv, m_pageNumber);
     m_docPriv->performSetAnnotationContents(m_prevContents, m_annotation, m_pageNumber);
     Q_EMIT m_docPriv->m_parent->annotationContentsChangedByUndoRedo(m_annotation, m_prevContents, m_prevCursorPos, m_prevAnchorPos);
 }
 
 void EditAnnotationContentsCommand::redo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_annotation->boundingRectangle(), m_docPriv, m_pageNumber);
     m_docPriv->performSetAnnotationContents(m_newContents, m_annotation, m_pageNumber);
     Q_EMIT m_docPriv->m_parent->annotationContentsChangedByUndoRedo(m_annotation, m_newContents, m_newCursorPos, m_newCursorPos);
 }
 
 int EditAnnotationContentsCommand::id() const
 {
     return 2;
 }
 
 bool EditAnnotationContentsCommand::mergeWith(const QUndoCommand *uc)
 {
     EditAnnotationContentsCommand *euc = (EditAnnotationContentsCommand *)uc;
     // Only attempt merge of euc into this if they modify the same annotation
     if (m_annotation == euc->m_annotation) {
         return EditTextCommand::mergeWith(uc);
     } else {
         return false;
     }
 }
 
 bool EditAnnotationContentsCommand::refreshInternalPageReferences(const QVector<Page *> &newPagesVector)
 {
     auto a = newPagesVector[m_pageNumber]->annotation(m_annotation->uniqueName());
     if (a) {
         m_annotation = a;
     }
 
     return true;
 }
 
 EditFormTextCommand::EditFormTextCommand(Okular::DocumentPrivate *docPriv, Okular::FormFieldText *form, int pageNumber, const QString &newContents, int newCursorPos, const QString &prevContents, int prevCursorPos, int prevAnchorPos)
     : EditTextCommand(newContents, newCursorPos, prevContents, prevCursorPos, prevAnchorPos)
     , m_docPriv(docPriv)
     , m_form(form)
     , m_pageNumber(pageNumber)
 {
     setText(i18nc("Edit an form's text contents", "edit form contents"));
 }
 
 void EditFormTextCommand::undo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_form->rect(), m_docPriv, m_pageNumber);
     m_form->setText(m_prevContents);
     Q_EMIT m_docPriv->m_parent->formTextChangedByUndoRedo(m_pageNumber, m_form, m_prevContents, m_prevCursorPos, m_prevAnchorPos);
     m_docPriv->notifyFormChanges(m_pageNumber);
 }
 
 void EditFormTextCommand::redo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_form->rect(), m_docPriv, m_pageNumber);
     m_form->setText(m_newContents);
     Q_EMIT m_docPriv->m_parent->formTextChangedByUndoRedo(m_pageNumber, m_form, m_newContents, m_newCursorPos, m_newCursorPos);
     m_docPriv->notifyFormChanges(m_pageNumber);
 }
 
 int EditFormTextCommand::id() const
 {
     return 3;
 }
 
 bool EditFormTextCommand::mergeWith(const QUndoCommand *uc)
 {
     EditFormTextCommand *euc = (EditFormTextCommand *)uc;
     // Only attempt merge of euc into this if they modify the same form
     if (m_form == euc->m_form) {
         return EditTextCommand::mergeWith(uc);
     } else {
         return false;
     }
 }
 
 bool EditFormTextCommand::refreshInternalPageReferences(const QVector<Page *> &newPagesVector)
 {
     m_form = dynamic_cast<FormFieldText *>(Okular::PagePrivate::findEquivalentForm(newPagesVector[m_pageNumber], m_form));
 
     return m_form;
 }
 
 EditFormListCommand::EditFormListCommand(Okular::DocumentPrivate *docPriv, FormFieldChoice *form, int pageNumber, const QList<int> &newChoices, const QList<int> &prevChoices)
     : m_docPriv(docPriv)
     , m_form(form)
     , m_pageNumber(pageNumber)
     , m_newChoices(newChoices)
     , m_prevChoices(prevChoices)
 {
     setText(i18nc("Edit a list form's choices", "edit list form choices"));
 }
 
 void EditFormListCommand::undo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_form->rect(), m_docPriv, m_pageNumber);
     m_form->setCurrentChoices(m_prevChoices);
     Q_EMIT m_docPriv->m_parent->formListChangedByUndoRedo(m_pageNumber, m_form, m_prevChoices);
     m_docPriv->notifyFormChanges(m_pageNumber);
 }
 
 void EditFormListCommand::redo()
 {
     moveViewportIfBoundingRectNotFullyVisible(m_form->rect(), m_docPriv, m_pageNumber);
     m_form->setCurrentChoices(m_newChoices);
     Q_EMIT m_docPriv->m_parent->formListChangedByUndoRedo(m_pageNumber, m_form, m_newChoices);
     m_docPriv->notifyFormChanges(m_pageNumber);
 }
 
 bool EditFormListCommand::refreshInternalPageReferences(const QVector<Page *> &newPagesVector)
 {
     m_form = dynamic_cast<FormFieldChoice *>(Okular::PagePrivate::findEquivalentForm(newPagesVector[m_pageNumber], m_form));
 
     return m_form;
 }
 
 EditFormComboCommand::EditFormComboCommand(Okular::DocumentPrivate *docPriv, FormFieldChoice *form, int pageNumber, const QString &newContents, int newCursorPos, const QString &prevContents, int prevCursorPos, int prevAnchorPos)
     : EditTextCommand(newContents, newCursorPos, prevContents, prevCursorPos, prevAnchorPos)
     , m_docPriv(docPriv)
     , m_form(form)
     , m_pageNumber(pageNumber)
     , m_newIndex(-1)
     , m_prevIndex(-1)
 {
     setText(i18nc("Edit a combo form's selection", "edit combo form selection"));
 
     // Determine new and previous choice indices (if any)
     for (int i = 0; i < m_form->choices().size(); i++) {
         if (m_form->choices().at(i) == m_prevContents) {
             m_prevIndex = i;
         }
 
         if (m_form->choices().at(i) == m_newContents) {
             m_newIndex = i;
         }
     }
 }
 
 void EditFormComboCommand::undo()
 {
     if (m_prevIndex != -1) {
         m_form->setCurrentChoices(QList<int>() << m_prevIndex);
     } else {
         m_form->setEditChoice(m_prevContents);
     }
     moveViewportIfBoundingRectNotFullyVisible(m_form->rect(), m_docPriv, m_pageNumber);
     Q_EMIT m_docPriv->m_parent->formComboChangedByUndoRedo(m_pageNumber, m_form, m_prevContents, m_prevCursorPos, m_prevAnchorPos);
     m_docPriv->notifyFormChanges(m_pageNumber);
 }
 
 void EditFormComboCommand::redo()
 {
     if (m_newIndex != -1) {
         m_form->setCurrentChoices(QList<int>() << m_newIndex);
     } else {
         m_form->setEditChoice(m_newContents);
     }
     moveViewportIfBoundingRectNotFullyVisible(m_form->rect(), m_docPriv, m_pageNumber);
     Q_EMIT m_docPriv->m_parent->formComboChangedByUndoRedo(m_pageNumber, m_form, m_newContents, m_newCursorPos, m_newCursorPos);
     m_docPriv->notifyFormChanges(m_pageNumber);
 }
 
 int EditFormComboCommand::id() const
 {
     return 4;
 }
 
 bool EditFormComboCommand::mergeWith(const QUndoCommand *uc)
 {
     EditFormComboCommand *euc = (EditFormComboCommand *)uc;
     // Only attempt merge of euc into this if they modify the same form
     if (m_form == euc->m_form) {
         bool shouldMerge = EditTextCommand::mergeWith(uc);
         if (shouldMerge) {
             m_newIndex = euc->m_newIndex;
         }
         return shouldMerge;
     } else {
         return false;
     }
 }
 
 bool EditFormComboCommand::refreshInternalPageReferences(const QVector<Page *> &newPagesVector)
 {
     m_form = dynamic_cast<FormFieldChoice *>(Okular::PagePrivate::findEquivalentForm(newPagesVector[m_pageNumber], m_form));
 
     return m_form;
 }
 
 EditFormButtonsCommand::EditFormButtonsCommand(Okular::DocumentPrivate *docPriv, int pageNumber, const QList<FormFieldButton *> &formButtons, const QList<bool> &newButtonStates)
     : m_docPriv(docPriv)
     , m_pageNumber(pageNumber)
     , m_formButtons(formButtons)
     , m_newButtonStates(newButtonStates)
     , m_prevButtonStates(QList<bool>())
 {
     setText(i18nc("Edit the state of a group of form buttons", "edit form button states"));
     for (const FormFieldButton *formButton : std::as_const(m_formButtons)) {
         m_prevButtonStates.append(formButton->state());
         m_pageNumbers.append(formButton->page()->number());
     }
 }
 
 void EditFormButtonsCommand::undo()
 {
     clearFormButtonStates();
     QSet<int> extraPages;
     for (int i = 0; i < m_formButtons.size(); i++) {
         bool checked = m_prevButtonStates.at(i);
         if (checked) {
             m_formButtons.at(i)->setState(checked);
         }
         if (m_pageNumbers.at(i) != m_pageNumber) {
             extraPages << m_pageNumbers.at(i);
         }
     }
 
     Okular::NormalizedRect boundingRect = buildBoundingRectangleForButtons(m_formButtons);
     moveViewportIfBoundingRectNotFullyVisible(boundingRect, m_docPriv, m_pageNumber);
     Q_EMIT m_docPriv->m_parent->formButtonsChangedByUndoRedo(m_pageNumber, m_formButtons);
     m_docPriv->notifyFormChanges(m_pageNumber);
     for (auto page : std::as_const(extraPages)) {
         m_docPriv->notifyFormChanges(page);
     }
 }
 
 void EditFormButtonsCommand::redo()
 {
     clearFormButtonStates();
     QSet<int> extraPages;
     for (int i = 0; i < m_formButtons.size(); i++) {
         bool checked = m_newButtonStates.at(i);
         if (checked) {
             m_formButtons.at(i)->setState(checked);
         }
         if (m_pageNumbers.at(i) != m_pageNumber) {
             extraPages << m_pageNumbers.at(i);
         }
     }
 
     Okular::NormalizedRect boundingRect = buildBoundingRectangleForButtons(m_formButtons);
     moveViewportIfBoundingRectNotFullyVisible(boundingRect, m_docPriv, m_pageNumber);
     Q_EMIT m_docPriv->m_parent->formButtonsChangedByUndoRedo(m_pageNumber, m_formButtons);
     m_docPriv->notifyFormChanges(m_pageNumber);
     for (auto page : std::as_const(extraPages)) {
         m_docPriv->notifyFormChanges(page);
     }
 }
 
 bool EditFormButtonsCommand::refreshInternalPageReferences(const QVector<Okular::Page *> &newPagesVector)
 {
     const QList<FormFieldButton *> oldFormButtons = m_formButtons;
     m_formButtons.clear();
     for (int i = 0; i < oldFormButtons.size(); i++) {
         FormFieldButton *button = dynamic_cast<FormFieldButton *>(Okular::PagePrivate::findEquivalentForm(newPagesVector[m_pageNumbers[i]], oldFormButtons[i]));
         if (!button) {
             return false;
         }
         m_formButtons << button;
     }
 
     return true;
 }
 
 void EditFormButtonsCommand::clearFormButtonStates()
 {
     for (FormFieldButton *formButton : std::as_const(m_formButtons)) {
         formButton->setState(false);
     }
 }
 
 }