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Diffstat (limited to 'sw/source/core/txtnode/SwGrammarContact.cxx')
| -rw-r--r-- | sw/source/core/txtnode/SwGrammarContact.cxx | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/sw/source/core/txtnode/SwGrammarContact.cxx b/sw/source/core/txtnode/SwGrammarContact.cxx new file mode 100644 index 000000000..0b3b49da4 --- /dev/null +++ b/sw/source/core/txtnode/SwGrammarContact.cxx @@ -0,0 +1,190 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <vcl/timer.hxx> +#include <IGrammarContact.hxx> +#include <pam.hxx> +#include <ndtxt.hxx> +#include <SwGrammarMarkUp.hxx> +#include <txtfrm.hxx> +#include <svl/listener.hxx> + +namespace { + +/* + * This class is responsible for the delayed display of grammar checks when a paragraph is edited + * It's a client of the paragraph the cursor points to. + * If the cursor position changes, updateCursorPosition has to be called + * If the grammar checker wants to set a grammar marker at a paragraph, he has to request + * the grammar list from this class. If the requested paragraph is not edited, it returns + * the normal grammar list. But if the paragraph is the active one, a proxy list will be returned and + * all changes are set in this proxy list. If the cursor leaves the paragraph the proxy list + * will replace the old list. If the grammar checker has completed the paragraph ('setChecked') + * then a timer is setup which replaces the old list as well. + */ +class SwGrammarContact final : public IGrammarContact, public SvtListener +{ + Timer m_aTimer; + std::unique_ptr<SwGrammarMarkUp> m_pProxyList; + bool m_isFinished; + SwTextNode* m_pTextNode; + DECL_LINK( TimerRepaint, Timer *, void ); + +public: + SwGrammarContact(); + virtual ~SwGrammarContact() override { m_aTimer.Stop(); } + + // (pure) virtual functions of IGrammarContact + virtual void updateCursorPosition( const SwPosition& rNewPos ) override; + virtual SwGrammarMarkUp* getGrammarCheck( SwTextNode& rTextNode, bool bCreate ) override; + virtual void finishGrammarCheck( SwTextNode& rTextNode ) override; + void CheckBroadcaster() + { + if(HasBroadcaster()) + return; + m_pTextNode = nullptr; + m_pProxyList.reset(); + } +}; + +} + +SwGrammarContact::SwGrammarContact() + : m_aTimer( "sw::SwGrammarContact TimerRepaint" ), + m_isFinished( false ), + m_pTextNode(nullptr) +{ + m_aTimer.SetTimeout( 2000 ); // Repaint of grammar check after 'setChecked' + m_aTimer.SetInvokeHandler( LINK(this, SwGrammarContact, TimerRepaint) ); +} + +IMPL_LINK( SwGrammarContact, TimerRepaint, Timer *, pTimer, void ) +{ + CheckBroadcaster(); + if( pTimer ) + { + pTimer->Stop(); + if( m_pTextNode ) + { //Replace the old wrong list by the proxy list and repaint all frames + m_pTextNode->SetGrammarCheck( std::move(m_pProxyList) ); + SwTextFrame::repaintTextFrames( *m_pTextNode ); + } + } +} + +/* I'm always a client of the current paragraph */ +void SwGrammarContact::updateCursorPosition( const SwPosition& rNewPos ) +{ + CheckBroadcaster(); + SwTextNode* pTextNode = rNewPos.nNode.GetNode().GetTextNode(); + if( pTextNode == m_pTextNode ) // paragraph has been changed + return; + + m_aTimer.Stop(); + if( m_pTextNode ) // My last paragraph has been left + { + if( m_pProxyList ) + { // replace old list by the proxy list and repaint + m_pTextNode->SetGrammarCheck( std::move(m_pProxyList) ); + SwTextFrame::repaintTextFrames( *m_pTextNode ); + } + EndListeningAll(); + } + if( pTextNode ) + { + m_pTextNode = pTextNode; + EndListeningAll(); + StartListening(pTextNode->GetNotifier()); // welcome new paragraph + } +} + +/* deliver a grammar check list for the given text node */ +SwGrammarMarkUp* SwGrammarContact::getGrammarCheck( SwTextNode& rTextNode, bool bCreate ) +{ + SwGrammarMarkUp *pRet = nullptr; + CheckBroadcaster(); + if( m_pTextNode == &rTextNode ) // hey, that's my current paragraph! + { // so you will get a proxy list... + if( bCreate ) + { + if( m_isFinished ) + { + m_pProxyList.reset(); + } + if( !m_pProxyList ) + { + if( rTextNode.GetGrammarCheck() ) + m_pProxyList.reset( static_cast<SwGrammarMarkUp*>(rTextNode.GetGrammarCheck()->Clone()) ); + else + { + m_pProxyList.reset( new SwGrammarMarkUp() ); + m_pProxyList->SetInvalid( 0, COMPLETE_STRING ); + } + } + m_isFinished = false; + } + pRet = m_pProxyList.get(); + } + else + { + pRet = rTextNode.GetGrammarCheck(); // do you have already a list? + if( bCreate && !pRet ) // do you want to create a list? + { + pRet = new SwGrammarMarkUp(); + pRet->SetInvalid( 0, COMPLETE_STRING ); + rTextNode.SetGrammarCheck( std::unique_ptr<SwGrammarMarkUp>(pRet) ); + rTextNode.SetGrammarCheckDirty( true ); + } + } + return pRet; +} + +void SwGrammarContact::finishGrammarCheck( SwTextNode& rTextNode ) +{ + CheckBroadcaster(); + if( &rTextNode != m_pTextNode ) // not my paragraph + SwTextFrame::repaintTextFrames( rTextNode ); // can be repainted directly + else + { + if( m_pProxyList ) + { + m_isFinished = true; + m_aTimer.Start(); // will replace old list and repaint with delay + } + else if( m_pTextNode->GetGrammarCheck() ) + { // all grammar problems seems to be gone, no delay needed + m_pTextNode->ClearGrammarCheck(); + SwTextFrame::repaintTextFrames( *m_pTextNode ); + } + } +} + +IGrammarContact* createGrammarContact() +{ + return new SwGrammarContact(); +} + +void finishGrammarCheck( SwTextNode& rTextNode ) +{ + IGrammarContact* pGrammarContact = getGrammarContact( rTextNode ); + if( pGrammarContact ) + pGrammarContact->finishGrammarCheck( rTextNode ); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |