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/* -*- 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 <textchain.hxx>
#include <textchaincursor.hxx>
#include <svx/svdedxv.hxx>
#include <svx/svdoutl.hxx>
#include <vcl/event.hxx>
// XXX: Possible duplication of code in behavior with stuff in ImpEditView (or ImpEditEngine) and OutlinerView
// XXX: We violate Demeter's Law several times here, I'm afraid
TextChainCursorManager::TextChainCursorManager(SdrObjEditView *pEditView, const SdrTextObj *pTextObj) :
mpEditView(pEditView),
mpTextObj(pTextObj),
mbHandlingDel(false)
{
assert(mpEditView);
assert(mpTextObj);
}
bool TextChainCursorManager::HandleKeyEvent( const KeyEvent& rKEvt )
{
ESelection aNewSel;
CursorChainingEvent aCursorEvent;
// check what the cursor/event situation looks like
bool bCompletelyHandled = false;
impDetectEvent(rKEvt, aCursorEvent, aNewSel, bCompletelyHandled);
if (aCursorEvent == CursorChainingEvent::NULL_EVENT)
return false;
else {
HandleCursorEvent(aCursorEvent, aNewSel);
// return value depends on the situation we are in
return bCompletelyHandled;
}
}
void TextChainCursorManager::impDetectEvent(const KeyEvent& rKEvt,
CursorChainingEvent& rOutCursorEvt,
ESelection& rOutSel,
bool& rOutHandled)
{
SdrOutliner *pOutl = mpEditView->GetTextEditOutliner();
OutlinerView *pOLV = mpEditView->GetTextEditOutlinerView();
SdrTextObj *pNextLink = mpTextObj->GetNextLinkInChain();
SdrTextObj *pPrevLink = mpTextObj->GetPrevLinkInChain();
KeyFuncType eFunc = rKEvt.GetKeyCode().GetFunction();
// We need to have this KeyFuncType
if (eFunc != KeyFuncType::DONTKNOW && eFunc != KeyFuncType::DELETE)
{
rOutCursorEvt = CursorChainingEvent::NULL_EVENT;
return;
}
sal_uInt16 nCode = rKEvt.GetKeyCode().GetCode();
ESelection aCurSel = pOLV->GetSelection();
ESelection aEndSelPrevBox(ESelection::AtEnd());
sal_Int32 nLastPara = pOutl->GetParagraphCount()-1;
OUString aLastParaText = pOutl->GetText(pOutl->GetParagraph(nLastPara));
sal_Int32 nLastParaLen = aLastParaText.getLength();
ESelection aEndSel(nLastPara, nLastParaLen);
bool bAtEndOfTextContent = aCurSel == aEndSel;
// Possibility: Are we "pushing" at the end of the object?
if (nCode == KEY_RIGHT && bAtEndOfTextContent && pNextLink)
{
rOutCursorEvt = CursorChainingEvent::TO_NEXT_LINK;
// Selection unchanged: we are at the beginning of the box
rOutHandled = true; // Nothing more to do than move cursor
return;
}
// Possibility: Are we "pushing" at the end of the object?
if (eFunc == KeyFuncType::DELETE && bAtEndOfTextContent && pNextLink)
{
rOutCursorEvt = CursorChainingEvent::TO_NEXT_LINK;
// Selection unchanged: we are at the beginning of the box
rOutHandled = false; // We still need to delete the characters
mbHandlingDel = true;
return;
}
ESelection aStartSel(0, 0);
bool bAtStartOfTextContent = aCurSel == aStartSel;
// Possibility: Are we "pushing" at the start of the object?
if (nCode == KEY_LEFT && bAtStartOfTextContent && pPrevLink)
{
rOutCursorEvt = CursorChainingEvent::TO_PREV_LINK;
rOutSel = aEndSelPrevBox; // Set at end of selection
rOutHandled = true; // Nothing more to do than move cursor
return;
}
// Possibility: Are we "pushing" at the start of the object and deleting left?
if (nCode == KEY_BACKSPACE && bAtStartOfTextContent && pPrevLink)
{
rOutCursorEvt = CursorChainingEvent::TO_PREV_LINK;
rOutSel = aEndSelPrevBox; // Set at end of selection
rOutHandled = false; // We need to delete characters after moving cursor
return;
}
// If arrived here there is no event detected
rOutCursorEvt = CursorChainingEvent::NULL_EVENT;
}
void TextChainCursorManager::HandleCursorEventAfterChaining(
const CursorChainingEvent aCurEvt,
const ESelection& aNewSel)
{
// Special case for DELETE handling: we need to get back at the end of the prev box
if (mbHandlingDel) {
// reset flag
mbHandlingDel = false;
// Move to end of prev box
SdrTextObj *pPrevLink = mpTextObj->GetPrevLinkInChain();
impChangeEditingTextObj(pPrevLink, ESelection::AtEnd());
return;
}
// Standard handling
HandleCursorEvent(aCurEvt, aNewSel);
}
void TextChainCursorManager::HandleCursorEvent(
const CursorChainingEvent aCurEvt,
const ESelection& aNewSel)
{
OutlinerView* pOLV = mpEditView->GetTextEditOutlinerView();
SdrTextObj *pNextLink = mpTextObj->GetNextLinkInChain();
SdrTextObj *pPrevLink = mpTextObj->GetPrevLinkInChain();
switch ( aCurEvt ) {
case CursorChainingEvent::UNCHANGED:
// Set same selection as before the chaining (which is saved as PostChainingSel)
// We need an explicit set because the Outliner is messed up
// after text transfer and otherwise it brings us at arbitrary positions.
pOLV->SetSelection(aNewSel);
break;
case CursorChainingEvent::TO_NEXT_LINK:
mpTextObj->GetTextChain()->SetSwitchingToNextBox(mpTextObj, true);
impChangeEditingTextObj(pNextLink, aNewSel);
break;
case CursorChainingEvent::TO_PREV_LINK:
impChangeEditingTextObj(pPrevLink, aNewSel);
break;
case CursorChainingEvent::NULL_EVENT:
// Do nothing here
break;
}
}
void TextChainCursorManager::impChangeEditingTextObj(SdrTextObj *pTargetTextObj, ESelection aNewSel)
{
assert(pTargetTextObj);
mpEditView->SdrEndTextEdit();
mpEditView->SdrBeginTextEdit(pTargetTextObj);
// OutlinerView has changed, so we update the pointer
OutlinerView *pOLV = mpEditView->GetTextEditOutlinerView();
pOLV->SetSelection(aNewSel);
// Update reference text obj
mpTextObj = pTargetTextObj;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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