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office-gobmx/starmath/source/cursor.cxx
Caolán McNamara ea21b870f8 weld SmGraphicWindow 
Change-Id: Ie163640d6453f30d1cebdaf75ecd41374b2b9ec3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/114351
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
2021-04-21 18:02:15 +02:00

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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/.
*/
#include <cursor.hxx>
#include <visitors.hxx>
#include <document.hxx>
#include <view.hxx>
#include <comphelper/string.hxx>
#include <editeng/editeng.hxx>
#include <osl/diagnose.h>
void SmCursor::Move(OutputDevice* pDev, SmMovementDirection direction, bool bMoveAnchor){
SmCaretPosGraphEntry* NewPos = nullptr;
switch(direction)
{
case MoveLeft:
if (mpPosition)
NewPos = mpPosition->Left;
OSL_ENSURE(NewPos, "NewPos shouldn't be NULL here!");
break;
case MoveRight:
if (mpPosition)
NewPos = mpPosition->Right;
OSL_ENSURE(NewPos, "NewPos shouldn't be NULL here!");
break;
case MoveUp:
//Implementation is practically identical to MoveDown, except for a single if statement
//so I've implemented them together and added a direction == MoveDown to the if statements.
case MoveDown:
if (mpPosition)
{
SmCaretLine from_line = SmCaretPos2LineVisitor(pDev, mpPosition->CaretPos).GetResult(),
best_line, //Best approximated line found so far
curr_line; //Current line
tools::Long dbp_sq = 0; //Distance squared to best line
for(const auto &pEntry : *mpGraph)
{
//Reject it if it's the current position
if(pEntry->CaretPos == mpPosition->CaretPos) continue;
//Compute caret line
curr_line = SmCaretPos2LineVisitor(pDev, pEntry->CaretPos).GetResult();
//Reject anything above if we're moving down
if(curr_line.GetTop() <= from_line.GetTop() && direction == MoveDown) continue;
//Reject anything below if we're moving up
if(curr_line.GetTop() + curr_line.GetHeight() >= from_line.GetTop() + from_line.GetHeight()
&& direction == MoveUp) continue;
//Compare if it to what we have, if we have anything yet
if(NewPos){
//Compute distance to current line squared, multiplied with a horizontal factor
tools::Long dp_sq = curr_line.SquaredDistanceX(from_line) * HORIZONTICAL_DISTANCE_FACTOR +
curr_line.SquaredDistanceY(from_line);
//Discard current line if best line is closer
if(dbp_sq <= dp_sq) continue;
}
//Take current line as the best
best_line = curr_line;
NewPos = pEntry.get();
//Update distance to best line
dbp_sq = best_line.SquaredDistanceX(from_line) * HORIZONTICAL_DISTANCE_FACTOR +
best_line.SquaredDistanceY(from_line);
}
}
break;
default:
assert(false);
}
if(NewPos){
mpPosition = NewPos;
if(bMoveAnchor)
mpAnchor = NewPos;
RequestRepaint();
}
}
void SmCursor::MoveTo(OutputDevice* pDev, const Point& pos, bool bMoveAnchor)
{
SmCaretPosGraphEntry* NewPos = nullptr;
tools::Long dp_sq = 0, //Distance to current line squared
dbp_sq = 1; //Distance to best line squared
for(const auto &pEntry : *mpGraph)
{
OSL_ENSURE(pEntry->CaretPos.IsValid(), "The caret position graph may not have invalid positions!");
//Compute current line
SmCaretLine curr_line = SmCaretPos2LineVisitor(pDev, pEntry->CaretPos).GetResult();
//Compute squared distance to current line
dp_sq = curr_line.SquaredDistanceX(pos) + curr_line.SquaredDistanceY(pos);
//If we have a position compare to it
if(NewPos){
//If best line is closer, reject current line
if(dbp_sq <= dp_sq) continue;
}
//Accept current position as the best
NewPos = pEntry.get();
//Update distance to best line
dbp_sq = dp_sq;
}
if(NewPos){
mpPosition = NewPos;
if(bMoveAnchor)
mpAnchor = NewPos;
RequestRepaint();
}
}
void SmCursor::BuildGraph(){
//Save the current anchor and position
SmCaretPos _anchor, _position;
//Release mpGraph if allocated
if(mpGraph){
if(mpAnchor)
_anchor = mpAnchor->CaretPos;
if(mpPosition)
_position = mpPosition->CaretPos;
mpGraph.reset();
//Reset anchor and position as they point into an old graph
mpAnchor = nullptr;
mpPosition = nullptr;
}
//Build the new graph
mpGraph.reset(SmCaretPosGraphBuildingVisitor(mpTree).takeGraph());
//Restore anchor and position pointers
if(_anchor.IsValid() || _position.IsValid()){
for(const auto &pEntry : *mpGraph)
{
if(_anchor == pEntry->CaretPos)
mpAnchor = pEntry.get();
if(_position == pEntry->CaretPos)
mpPosition = pEntry.get();
}
}
//Set position and anchor to first caret position
auto it = mpGraph->begin();
assert(it != mpGraph->end());
if(!mpPosition)
mpPosition = it->get();
if(!mpAnchor)
mpAnchor = mpPosition;
assert(mpPosition);
assert(mpAnchor);
OSL_ENSURE(mpPosition->CaretPos.IsValid(), "Position must be valid");
OSL_ENSURE(mpAnchor->CaretPos.IsValid(), "Anchor must be valid");
}
bool SmCursor::SetCaretPosition(SmCaretPos pos){
for(const auto &pEntry : *mpGraph)
{
if(pEntry->CaretPos == pos)
{
mpPosition = pEntry.get();
mpAnchor = pEntry.get();
return true;
}
}
return false;
}
void SmCursor::AnnotateSelection(){
//TODO: Manage a state, reset it upon modification and optimize this call
SmSetSelectionVisitor(mpAnchor->CaretPos, mpPosition->CaretPos, mpTree);
}
void SmCursor::Draw(OutputDevice& pDev, Point Offset, bool isCaretVisible){
SmCaretDrawingVisitor(pDev, GetPosition(), Offset, isCaretVisible);
}
void SmCursor::DeletePrev(OutputDevice* pDev){
//Delete only a selection if there's a selection
if(HasSelection()){
Delete();
return;
}
SmNode* pLine = FindTopMostNodeInLine(mpPosition->CaretPos.pSelectedNode);
SmStructureNode* pLineParent = pLine->GetParent();
int nLineOffsetIdx = pLineParent->IndexOfSubNode(pLine);
assert(nLineOffsetIdx >= 0);
//If we're in front of a node who's parent is a TABLE
if (pLineParent->GetType() == SmNodeType::Table && mpPosition->CaretPos.nIndex == 0 && nLineOffsetIdx > 0)
{
size_t nLineOffset = nLineOffsetIdx;
//Now we can merge with nLineOffset - 1
BeginEdit();
//Line to merge things into, so we can delete pLine
SmNode* pMergeLine = pLineParent->GetSubNode(nLineOffset-1);
OSL_ENSURE(pMergeLine, "pMergeLine cannot be NULL!");
SmCaretPos PosAfterDelete;
//Convert first line to list
std::unique_ptr<SmNodeList> pLineList(new SmNodeList);
NodeToList(pMergeLine, *pLineList);
if(!pLineList->empty()){
//Find iterator to patch
SmNodeList::iterator patchPoint = pLineList->end();
--patchPoint;
//Convert second line to list
NodeToList(pLine, *pLineList);
//Patch the line list
++patchPoint;
PosAfterDelete = PatchLineList(pLineList.get(), patchPoint);
//Parse the line
pLine = SmNodeListParser().Parse(pLineList.get());
}
pLineList.reset();
pLineParent->SetSubNode(nLineOffset-1, pLine);
//Delete the removed line slot
SmNodeArray lines(pLineParent->GetNumSubNodes()-1);
for (size_t i = 0; i < pLineParent->GetNumSubNodes(); ++i)
{
if(i < nLineOffset)
lines[i] = pLineParent->GetSubNode(i);
else if(i > nLineOffset)
lines[i-1] = pLineParent->GetSubNode(i);
}
pLineParent->SetSubNodes(std::move(lines));
//Rebuild graph
mpAnchor = nullptr;
mpPosition = nullptr;
BuildGraph();
AnnotateSelection();
//Set caret position
if(!SetCaretPosition(PosAfterDelete))
SetCaretPosition(SmCaretPos(pLine, 0));
//Finish editing
EndEdit();
//TODO: If we're in an empty (sub/super/*) script
/*}else if(pLineParent->GetType() == SmNodeType::SubSup &&
nLineOffset != 0 &&
pLine->GetType() == SmNodeType::Expression &&
pLine->GetNumSubNodes() == 0){
//There's a (sub/super) script we can delete
//Consider selecting the entire script if GetNumSubNodes() != 0 or pLine->GetType() != SmNodeType::Expression
//TODO: Handle case where we delete a limit
*/
//Else move select, and delete if not complex
}else{
Move(pDev, MoveLeft, false);
if(!HasComplexSelection())
Delete();
}
}
void SmCursor::Delete(){
//Return if we don't have a selection to delete
if(!HasSelection())
return;
//Enter edit section
BeginEdit();
//Set selected on nodes
AnnotateSelection();
//Find an arbitrary selected node
SmNode* pSNode = FindSelectedNode(mpTree);
assert(pSNode);
//Find the topmost node of the line that holds the selection
SmNode* pLine = FindTopMostNodeInLine(pSNode, true);
OSL_ENSURE(pLine != mpTree, "Shouldn't be able to select the entire tree");
//Get the parent of the line
SmStructureNode* pLineParent = pLine->GetParent();
//Find line offset in parent
int nLineOffset = pLineParent->IndexOfSubNode(pLine);
assert(nLineOffset >= 0);
//Position after delete
SmCaretPos PosAfterDelete;
std::unique_ptr<SmNodeList> pLineList(new SmNodeList);
NodeToList(pLine, *pLineList);
//Take the selected nodes and delete them...
SmNodeList::iterator patchIt = TakeSelectedNodesFromList(pLineList.get());
//Get the position to set after delete
PosAfterDelete = PatchLineList(pLineList.get(), patchIt);
//Finish editing
FinishEdit(std::move(pLineList), pLineParent, nLineOffset, PosAfterDelete);
}
void SmCursor::InsertNodes(std::unique_ptr<SmNodeList> pNewNodes){
if(pNewNodes->empty()){
return;
}
//Begin edit section
BeginEdit();
//Get the current position
const SmCaretPos pos = mpPosition->CaretPos;
//Find top most of line that holds position
SmNode* pLine = FindTopMostNodeInLine(pos.pSelectedNode);
//Find line parent and line index in parent
SmStructureNode* pLineParent = pLine->GetParent();
int nParentIndex = pLineParent->IndexOfSubNode(pLine);
assert(nParentIndex >= 0);
//Convert line to list
std::unique_ptr<SmNodeList> pLineList(new SmNodeList);
NodeToList(pLine, *pLineList);
//Find iterator for place to insert nodes
SmNodeList::iterator it = FindPositionInLineList(pLineList.get(), pos);
//Insert all new nodes
SmNodeList::iterator newIt,
patchIt = it, // (pointless default value, fixes compiler warnings)
insIt;
for(newIt = pNewNodes->begin(); newIt != pNewNodes->end(); ++newIt){
insIt = pLineList->insert(it, *newIt);
if(newIt == pNewNodes->begin())
patchIt = insIt;
}
//Patch the places we've changed stuff
PatchLineList(pLineList.get(), patchIt);
SmCaretPos PosAfterInsert = PatchLineList(pLineList.get(), it);
//Release list, we've taken the nodes
pNewNodes.reset();
//Finish editing
FinishEdit(std::move(pLineList), pLineParent, nParentIndex, PosAfterInsert);
}
SmNodeList::iterator SmCursor::FindPositionInLineList(SmNodeList* pLineList,
const SmCaretPos& rCaretPos)
{
//Find iterator for position
SmNodeList::iterator it = std::find(pLineList->begin(), pLineList->end(), rCaretPos.pSelectedNode);
if (it != pLineList->end())
{
if((*it)->GetType() == SmNodeType::Text)
{
//Split textnode if needed
if(rCaretPos.nIndex > 0)
{
SmTextNode* pText = static_cast<SmTextNode*>(rCaretPos.pSelectedNode);
if (rCaretPos.nIndex == pText->GetText().getLength())
return ++it;
OUString str1 = pText->GetText().copy(0, rCaretPos.nIndex);
OUString str2 = pText->GetText().copy(rCaretPos.nIndex);
pText->ChangeText(str1);
++it;
//Insert str2 as new text node
assert(!str2.isEmpty());
SmTextNode* pNewText = new SmTextNode(pText->GetToken(), pText->GetFontDesc());
pNewText->ChangeText(str2);
it = pLineList->insert(it, pNewText);
}
}else
++it;
//it now pointer to the node following pos, so pLineList->insert(it, ...) will insert correctly
return it;
}
//If we didn't find pSelectedNode, it must be because the caret is in front of the line
return pLineList->begin();
}
SmCaretPos SmCursor::PatchLineList(SmNodeList* pLineList, SmNodeList::iterator aIter) {
//The nodes we should consider merging
SmNode *prev = nullptr,
*next = nullptr;
if(aIter != pLineList->end())
next = *aIter;
if(aIter != pLineList->begin()) {
--aIter;
prev = *aIter;
++aIter;
}
//Check if there's textnodes to merge
if( prev &&
next &&
prev->GetType() == SmNodeType::Text &&
next->GetType() == SmNodeType::Text &&
( prev->GetToken().eType != TNUMBER ||
next->GetToken().eType == TNUMBER) ){
SmTextNode *pText = static_cast<SmTextNode*>(prev),
*pOldN = static_cast<SmTextNode*>(next);
SmCaretPos retval(pText, pText->GetText().getLength());
OUString newText = pText->GetText() + pOldN->GetText();
pText->ChangeText(newText);
delete pOldN;
pLineList->erase(aIter);
return retval;
}
//Check if there's a SmPlaceNode to remove:
if(prev && next && prev->GetType() == SmNodeType::Place && !SmNodeListParser::IsOperator(next->GetToken())){
--aIter;
aIter = pLineList->erase(aIter);
delete prev;
//Return caret pos in front of aIter
if(aIter != pLineList->begin())
--aIter; //Thus find node before aIter
if(aIter == pLineList->begin())
return SmCaretPos();
return SmCaretPos::GetPosAfter(*aIter);
}
if(prev && next && next->GetType() == SmNodeType::Place && !SmNodeListParser::IsOperator(prev->GetToken())){
aIter = pLineList->erase(aIter);
delete next;
return SmCaretPos::GetPosAfter(prev);
}
//If we didn't do anything return
if(!prev) //return an invalid to indicate we're in front of line
return SmCaretPos();
return SmCaretPos::GetPosAfter(prev);
}
SmNodeList::iterator SmCursor::TakeSelectedNodesFromList(SmNodeList *pLineList,
SmNodeList *pSelectedNodes) {
SmNodeList::iterator retval;
SmNodeList::iterator it = pLineList->begin();
while(it != pLineList->end()){
if((*it)->IsSelected()){
//Split text nodes
if((*it)->GetType() == SmNodeType::Text) {
SmTextNode* pText = static_cast<SmTextNode*>(*it);
OUString aText = pText->GetText();
//Start and lengths of the segments, 2 is the selected segment
int start2 = pText->GetSelectionStart(),
start3 = pText->GetSelectionEnd(),
len1 = start2 - 0,
len2 = start3 - start2,
len3 = aText.getLength() - start3;
SmToken aToken = pText->GetToken();
sal_uInt16 eFontDesc = pText->GetFontDesc();
//If we need make segment 1
if(len1 > 0) {
OUString str = aText.copy(0, len1);
pText->ChangeText(str);
++it;
} else {//Remove it if not needed
it = pLineList->erase(it);
delete pText;
}
//Set retval to be right after the selection
retval = it;
//if we need make segment 3
if(len3 > 0) {
OUString str = aText.copy(start3, len3);
SmTextNode* pSeg3 = new SmTextNode(aToken, eFontDesc);
pSeg3->ChangeText(str);
retval = pLineList->insert(it, pSeg3);
}
//If we need to save the selected text
if(pSelectedNodes && len2 > 0) {
OUString str = aText.copy(start2, len2);
SmTextNode* pSeg2 = new SmTextNode(aToken, eFontDesc);
pSeg2->ChangeText(str);
pSelectedNodes->push_back(pSeg2);
}
} else { //if it's not textnode
SmNode* pNode = *it;
retval = it = pLineList->erase(it);
if(pSelectedNodes)
pSelectedNodes->push_back(pNode);
else
delete pNode;
}
} else
++it;
}
return retval;
}
void SmCursor::InsertSubSup(SmSubSup eSubSup) {
AnnotateSelection();
//Find line
SmNode *pLine;
if(HasSelection()) {
SmNode *pSNode = FindSelectedNode(mpTree);
assert(pSNode);
pLine = FindTopMostNodeInLine(pSNode, true);
} else
pLine = FindTopMostNodeInLine(mpPosition->CaretPos.pSelectedNode);
//Find Parent and offset in parent
SmStructureNode *pLineParent = pLine->GetParent();
int nParentIndex = pLineParent->IndexOfSubNode(pLine);
assert(nParentIndex >= 0);
//TODO: Consider handling special cases where parent is an SmOperNode,
// Maybe this method should be able to add limits to an SmOperNode...
//We begin modifying the tree here
BeginEdit();
//Convert line to list
std::unique_ptr<SmNodeList> pLineList(new SmNodeList);
NodeToList(pLine, *pLineList);
//Take the selection, and/or find iterator for current position
std::unique_ptr<SmNodeList> pSelectedNodesList(new SmNodeList);
SmNodeList::iterator it;
if(HasSelection())
it = TakeSelectedNodesFromList(pLineList.get(), pSelectedNodesList.get());
else
it = FindPositionInLineList(pLineList.get(), mpPosition->CaretPos);
//Find node that this should be applied to
SmNode* pSubject;
bool bPatchLine = !pSelectedNodesList->empty(); //If the line should be patched later
if(it != pLineList->begin()) {
--it;
pSubject = *it;
++it;
} else {
//Create a new place node
pSubject = new SmPlaceNode();
pSubject->Prepare(mpDocShell->GetFormat(), *mpDocShell, 0);
it = pLineList->insert(it, pSubject);
++it;
bPatchLine = true; //We've modified the line it should be patched later.
}
//Wrap the subject in a SmSubSupNode
SmSubSupNode* pSubSup;
if(pSubject->GetType() != SmNodeType::SubSup){
SmToken token;
token.nGroup = TG::Power;
pSubSup = new SmSubSupNode(token);
pSubSup->SetBody(pSubject);
*(--it) = pSubSup;
++it;
}else
pSubSup = static_cast<SmSubSupNode*>(pSubject);
//pSubject shouldn't be referenced anymore, pSubSup is the SmSubSupNode in pLineList we wish to edit.
//and it pointer to the element following pSubSup in pLineList.
pSubject = nullptr;
//Patch the line if we noted that was needed previously
if(bPatchLine)
PatchLineList(pLineList.get(), it);
//Convert existing, if any, sub-/superscript line to list
SmNode *pScriptLine = pSubSup->GetSubSup(eSubSup);
std::unique_ptr<SmNodeList> pScriptLineList(new SmNodeList);
NodeToList(pScriptLine, *pScriptLineList);
//Add selection to pScriptLineList
unsigned int nOldSize = pScriptLineList->size();
pScriptLineList->insert(pScriptLineList->end(), pSelectedNodesList->begin(), pSelectedNodesList->end());
pSelectedNodesList.reset();
//Patch pScriptLineList if needed
if(0 < nOldSize && nOldSize < pScriptLineList->size()) {
SmNodeList::iterator iPatchPoint = pScriptLineList->begin();
std::advance(iPatchPoint, nOldSize);
PatchLineList(pScriptLineList.get(), iPatchPoint);
}
//Find caret pos, that should be used after sub-/superscription.
SmCaretPos PosAfterScript; //Leave invalid for first position
if (!pScriptLineList->empty())
PosAfterScript = SmCaretPos::GetPosAfter(pScriptLineList->back());
//Parse pScriptLineList
pScriptLine = SmNodeListParser().Parse(pScriptLineList.get());
pScriptLineList.reset();
//Insert pScriptLine back into the tree
pSubSup->SetSubSup(eSubSup, pScriptLine);
//Finish editing
FinishEdit(std::move(pLineList), pLineParent, nParentIndex, PosAfterScript, pScriptLine);
}
void SmCursor::InsertBrackets(SmBracketType eBracketType) {
BeginEdit();
AnnotateSelection();
//Find line
SmNode *pLine;
if(HasSelection()) {
SmNode *pSNode = FindSelectedNode(mpTree);
assert(pSNode);
pLine = FindTopMostNodeInLine(pSNode, true);
} else
pLine = FindTopMostNodeInLine(mpPosition->CaretPos.pSelectedNode);
//Find parent and offset in parent
SmStructureNode *pLineParent = pLine->GetParent();
int nParentIndex = pLineParent->IndexOfSubNode(pLine);
assert(nParentIndex >= 0);
//Convert line to list
std::unique_ptr<SmNodeList> pLineList(new SmNodeList);
NodeToList(pLine, *pLineList);
//Take the selection, and/or find iterator for current position
std::unique_ptr<SmNodeList> pSelectedNodesList(new SmNodeList);
SmNodeList::iterator it;
if(HasSelection())
it = TakeSelectedNodesFromList(pLineList.get(), pSelectedNodesList.get());
else
it = FindPositionInLineList(pLineList.get(), mpPosition->CaretPos);
//If there's no selected nodes, create a place node
std::unique_ptr<SmNode> pBodyNode;
SmCaretPos PosAfterInsert;
if(pSelectedNodesList->empty()) {
pBodyNode.reset(new SmPlaceNode());
PosAfterInsert = SmCaretPos(pBodyNode.get(), 1);
} else
pBodyNode.reset(SmNodeListParser().Parse(pSelectedNodesList.get()));
pSelectedNodesList.reset();
//Create SmBraceNode
SmToken aTok(TLEFT, '\0', "left", TG::NONE, 5);
SmBraceNode *pBrace = new SmBraceNode(aTok);
pBrace->SetScaleMode(SmScaleMode::Height);
std::unique_ptr<SmNode> pLeft( CreateBracket(eBracketType, true) ),
pRight( CreateBracket(eBracketType, false) );
std::unique_ptr<SmBracebodyNode> pBody(new SmBracebodyNode(SmToken()));
pBody->SetSubNodes(std::move(pBodyNode), nullptr);
pBrace->SetSubNodes(std::move(pLeft), std::move(pBody), std::move(pRight));
pBrace->Prepare(mpDocShell->GetFormat(), *mpDocShell, 0);
//Insert into line
pLineList->insert(it, pBrace);
//Patch line (I think this is good enough)
SmCaretPos aAfter = PatchLineList(pLineList.get(), it);
if( !PosAfterInsert.IsValid() )
PosAfterInsert = aAfter;
//Finish editing
FinishEdit(std::move(pLineList), pLineParent, nParentIndex, PosAfterInsert);
}
SmNode *SmCursor::CreateBracket(SmBracketType eBracketType, bool bIsLeft) {
SmToken aTok;
if(bIsLeft){
switch(eBracketType){
case SmBracketType::Round:
aTok = SmToken(TLPARENT, MS_LPARENT, "(", TG::LBrace, 5);
break;
case SmBracketType::Square:
aTok = SmToken(TLBRACKET, MS_LBRACKET, "[", TG::LBrace, 5);
break;
case SmBracketType::Curly:
aTok = SmToken(TLBRACE, MS_LBRACE, "lbrace", TG::LBrace, 5);
break;
}
} else {
switch(eBracketType) {
case SmBracketType::Round:
aTok = SmToken(TRPARENT, MS_RPARENT, ")", TG::RBrace, 5);
break;
case SmBracketType::Square:
aTok = SmToken(TRBRACKET, MS_RBRACKET, "]", TG::RBrace, 5);
break;
case SmBracketType::Curly:
aTok = SmToken(TRBRACE, MS_RBRACE, "rbrace", TG::RBrace, 5);
break;
}
}
SmNode* pRetVal = new SmMathSymbolNode(aTok);
pRetVal->SetScaleMode(SmScaleMode::Height);
return pRetVal;
}
bool SmCursor::InsertRow() {
AnnotateSelection();
//Find line
SmNode *pLine;
if(HasSelection()) {
SmNode *pSNode = FindSelectedNode(mpTree);
assert(pSNode);
pLine = FindTopMostNodeInLine(pSNode, true);
} else
pLine = FindTopMostNodeInLine(mpPosition->CaretPos.pSelectedNode);
//Find parent and offset in parent
SmStructureNode *pLineParent = pLine->GetParent();
int nParentIndex = pLineParent->IndexOfSubNode(pLine);
assert(nParentIndex >= 0);
//Discover the context of this command
SmTableNode *pTable = nullptr;
SmMatrixNode *pMatrix = nullptr;
int nTableIndex = nParentIndex;
if(pLineParent->GetType() == SmNodeType::Table)
pTable = static_cast<SmTableNode*>(pLineParent);
//If it's wrapped in a SmLineNode, we can still insert a newline
else if(pLineParent->GetType() == SmNodeType::Line &&
pLineParent->GetParent() &&
pLineParent->GetParent()->GetType() == SmNodeType::Table) {
//NOTE: This hack might give problems if we stop ignoring SmAlignNode
pTable = static_cast<SmTableNode*>(pLineParent->GetParent());
nTableIndex = pTable->IndexOfSubNode(pLineParent);
assert(nTableIndex >= 0);
}
if(pLineParent->GetType() == SmNodeType::Matrix)
pMatrix = static_cast<SmMatrixNode*>(pLineParent);
//If we're not in a context that supports InsertRow, return sal_False
if(!pTable && !pMatrix)
return false;
//Now we start editing
BeginEdit();
//Convert line to list
std::unique_ptr<SmNodeList> pLineList(new SmNodeList);
NodeToList(pLine, *pLineList);
//Find position in line
SmNodeList::iterator it;
if(HasSelection()) {
//Take the selected nodes and delete them...
it = TakeSelectedNodesFromList(pLineList.get());
} else
it = FindPositionInLineList(pLineList.get(), mpPosition->CaretPos);
//New caret position after inserting the newline/row in whatever context
SmCaretPos PosAfterInsert;
//If we're in the context of a table
if(pTable) {
std::unique_ptr<SmNodeList> pNewLineList(new SmNodeList);
//Move elements from pLineList to pNewLineList
SmNodeList& rLineList = *pLineList;
pNewLineList->splice(pNewLineList->begin(), rLineList, it, rLineList.end());
//Make sure it is valid again
it = pLineList->end();
if(it != pLineList->begin())
--it;
if(pNewLineList->empty())
pNewLineList->push_front(new SmPlaceNode());
//Parse new line
std::unique_ptr<SmNode> pNewLine(SmNodeListParser().Parse(pNewLineList.get()));
pNewLineList.reset();
//Wrap pNewLine in SmLineNode if needed
if(pLineParent->GetType() == SmNodeType::Line) {
std::unique_ptr<SmLineNode> pNewLineNode(new SmLineNode(SmToken(TNEWLINE, '\0', "newline")));
pNewLineNode->SetSubNodes(std::move(pNewLine), nullptr);
pNewLine = std::move(pNewLineNode);
}
//Get position
PosAfterInsert = SmCaretPos(pNewLine.get(), 0);
//Move other nodes if needed
for( int i = pTable->GetNumSubNodes(); i > nTableIndex + 1; i--)
pTable->SetSubNode(i, pTable->GetSubNode(i-1));
//Insert new line
pTable->SetSubNode(nTableIndex + 1, pNewLine.release());
//Check if we need to change token type:
if(pTable->GetNumSubNodes() > 2 && pTable->GetToken().eType == TBINOM) {
SmToken tok = pTable->GetToken();
tok.eType = TSTACK;
pTable->SetToken(tok);
}
}
//If we're in the context of a matrix
else {
//Find position after insert and patch the list
PosAfterInsert = PatchLineList(pLineList.get(), it);
//Move other children
sal_uInt16 rows = pMatrix->GetNumRows();
sal_uInt16 cols = pMatrix->GetNumCols();
int nRowStart = (nParentIndex - nParentIndex % cols) + cols;
for( int i = pMatrix->GetNumSubNodes() + cols - 1; i >= nRowStart + cols; i--)
pMatrix->SetSubNode(i, pMatrix->GetSubNode(i - cols));
for( int i = nRowStart; i < nRowStart + cols; i++) {
SmPlaceNode *pNewLine = new SmPlaceNode();
if(i == nParentIndex + cols)
PosAfterInsert = SmCaretPos(pNewLine, 0);
pMatrix->SetSubNode(i, pNewLine);
}
pMatrix->SetRowCol(rows + 1, cols);
}
//Finish editing
FinishEdit(std::move(pLineList), pLineParent, nParentIndex, PosAfterInsert);
//FinishEdit is actually used to handle situations where parent is an instance of
//SmSubSupNode. In this case parent should always be a table or matrix, however, for
//code reuse we just use FinishEdit() here too.
return true;
}
void SmCursor::InsertFraction() {
AnnotateSelection();
//Find line
SmNode *pLine;
if(HasSelection()) {
SmNode *pSNode = FindSelectedNode(mpTree);
assert(pSNode);
pLine = FindTopMostNodeInLine(pSNode, true);
} else
pLine = FindTopMostNodeInLine(mpPosition->CaretPos.pSelectedNode);
//Find Parent and offset in parent
SmStructureNode *pLineParent = pLine->GetParent();
int nParentIndex = pLineParent->IndexOfSubNode(pLine);
assert(nParentIndex >= 0);
//We begin modifying the tree here
BeginEdit();
//Convert line to list
std::unique_ptr<SmNodeList> pLineList(new SmNodeList);
NodeToList(pLine, *pLineList);
//Take the selection, and/or find iterator for current position
std::unique_ptr<SmNodeList> pSelectedNodesList(new SmNodeList);
SmNodeList::iterator it;
if(HasSelection())
it = TakeSelectedNodesFromList(pLineList.get(), pSelectedNodesList.get());
else
it = FindPositionInLineList(pLineList.get(), mpPosition->CaretPos);
//Create pNum, and pDenom
bool bEmptyFraction = pSelectedNodesList->empty();
std::unique_ptr<SmNode> pNum( bEmptyFraction
? new SmPlaceNode()
: SmNodeListParser().Parse(pSelectedNodesList.get()) );
std::unique_ptr<SmNode> pDenom(new SmPlaceNode());
pSelectedNodesList.reset();
//Create new fraction
SmBinVerNode *pFrac = new SmBinVerNode(SmToken(TOVER, '\0', "over", TG::Product, 0));
std::unique_ptr<SmNode> pRect(new SmRectangleNode(SmToken()));
pFrac->SetSubNodes(std::move(pNum), std::move(pRect), std::move(pDenom));
//Insert in pLineList
SmNodeList::iterator patchIt = pLineList->insert(it, pFrac);
PatchLineList(pLineList.get(), patchIt);
PatchLineList(pLineList.get(), it);
//Finish editing
SmNode *pSelectedNode = bEmptyFraction ? pFrac->GetSubNode(0) : pFrac->GetSubNode(2);
FinishEdit(std::move(pLineList), pLineParent, nParentIndex, SmCaretPos(pSelectedNode, 1));
}
void SmCursor::InsertText(const OUString& aString)
{
BeginEdit();
Delete();
SmToken token;
token.eType = TIDENT;
token.cMathChar = u"";
token.nGroup = TG::NONE;
token.nLevel = 5;
token.aText = aString;
SmTextNode* pText = new SmTextNode(token, FNT_VARIABLE);
pText->SetText(aString);
pText->AdjustFontDesc();
pText->Prepare(mpDocShell->GetFormat(), *mpDocShell, 0);
std::unique_ptr<SmNodeList> pList(new SmNodeList);
pList->push_front(pText);
InsertNodes(std::move(pList));
EndEdit();
}
void SmCursor::InsertElement(SmFormulaElement element){
BeginEdit();
Delete();
//Create new node
SmNode* pNewNode = nullptr;
switch(element){
case BlankElement:
{
SmToken token;
token.eType = TBLANK;
token.nGroup = TG::Blank;
token.aText = "~";
SmBlankNode* pBlankNode = new SmBlankNode(token);
pBlankNode->IncreaseBy(token);
pNewNode = pBlankNode;
}break;
case FactorialElement:
{
SmToken token(TFACT, MS_FACT, "fact", TG::UnOper, 5);
pNewNode = new SmMathSymbolNode(token);
}break;
case PlusElement:
{
SmToken token;
token.eType = TPLUS;
token.setChar(MS_PLUS);
token.nGroup = TG::UnOper | TG::Sum;
token.nLevel = 5;
token.aText = "+";
pNewNode = new SmMathSymbolNode(token);
}break;
case MinusElement:
{
SmToken token;
token.eType = TMINUS;
token.setChar(MS_MINUS);
token.nGroup = TG::UnOper | TG::Sum;
token.nLevel = 5;
token.aText = "-";
pNewNode = new SmMathSymbolNode(token);
}break;
case CDotElement:
{
SmToken token;
token.eType = TCDOT;
token.setChar(MS_CDOT);
token.nGroup = TG::Product;
token.aText = "cdot";
pNewNode = new SmMathSymbolNode(token);
}break;
case EqualElement:
{
SmToken token;
token.eType = TASSIGN;
token.setChar(MS_ASSIGN);
token.nGroup = TG::Relation;
token.aText = "=";
pNewNode = new SmMathSymbolNode(token);
}break;
case LessThanElement:
{
SmToken token;
token.eType = TLT;
token.setChar(MS_LT);
token.nGroup = TG::Relation;
token.aText = "<";
pNewNode = new SmMathSymbolNode(token);
}break;
case GreaterThanElement:
{
SmToken token;
token.eType = TGT;
token.setChar(MS_GT);
token.nGroup = TG::Relation;
token.aText = ">";
pNewNode = new SmMathSymbolNode(token);
}break;
case PercentElement:
{
SmToken token;
token.eType = TTEXT;
token.setChar(MS_PERCENT);
token.nGroup = TG::NONE;
token.aText = "\"%\"";
pNewNode = new SmMathSymbolNode(token);
}break;
}
assert(pNewNode);
//Prepare the new node
pNewNode->Prepare(mpDocShell->GetFormat(), *mpDocShell, 0);
//Insert new node
std::unique_ptr<SmNodeList> pList(new SmNodeList);
pList->push_front(pNewNode);
InsertNodes(std::move(pList));
EndEdit();
}
void SmCursor::InsertSpecial(std::u16string_view _aString)
{
BeginEdit();
Delete();
OUString aString = comphelper::string::strip(_aString, ' ');
//Create instance of special node
SmToken token;
token.eType = TSPECIAL;
token.cMathChar = u"";
token.nGroup = TG::NONE;
token.nLevel = 5;
token.aText = aString;
SmSpecialNode* pSpecial = new SmSpecialNode(token);
//Prepare the special node
pSpecial->Prepare(mpDocShell->GetFormat(), *mpDocShell, 0);
//Insert the node
std::unique_ptr<SmNodeList> pList(new SmNodeList);
pList->push_front(pSpecial);
InsertNodes(std::move(pList));
EndEdit();
}
void SmCursor::InsertCommandText(const OUString& aCommandText) {
//Parse the sub expression
auto xSubExpr = mpDocShell->GetParser()->ParseExpression(aCommandText);
//Prepare the subtree
xSubExpr->Prepare(mpDocShell->GetFormat(), *mpDocShell, 0);
//Convert subtree to list
SmNode* pSubExpr = xSubExpr.release();
std::unique_ptr<SmNodeList> pLineList(new SmNodeList);
NodeToList(pSubExpr, *pLineList);
BeginEdit();
//Delete any selection
Delete();
//Insert it
InsertNodes(std::move(pLineList));
EndEdit();
}
void SmCursor::Copy(){
if(!HasSelection())
return;
AnnotateSelection();
//Find selected node
SmNode* pSNode = FindSelectedNode(mpTree);
assert(pSNode);
//Find visual line
SmNode* pLine = FindTopMostNodeInLine(pSNode, true);
assert(pLine);
//Clone selected nodes
SmClipboard aClipboard;
if(IsLineCompositionNode(pLine))
CloneLineToClipboard(static_cast<SmStructureNode*>(pLine), &aClipboard);
else{
//Special care to only clone selected text
if(pLine->GetType() == SmNodeType::Text) {
SmTextNode *pText = static_cast<SmTextNode*>(pLine);
std::unique_ptr<SmTextNode> pClone(new SmTextNode( pText->GetToken(), pText->GetFontDesc() ));
int start = pText->GetSelectionStart(),
length = pText->GetSelectionEnd() - pText->GetSelectionStart();
pClone->ChangeText(pText->GetText().copy(start, length));
pClone->SetScaleMode(pText->GetScaleMode());
aClipboard.push_front(std::move(pClone));
} else {
SmCloningVisitor aCloneFactory;
aClipboard.push_front(std::unique_ptr<SmNode>(aCloneFactory.Clone(pLine)));
}
}
//Set clipboard
if (!aClipboard.empty())
maClipboard = std::move(aClipboard);
}
void SmCursor::Paste() {
BeginEdit();
Delete();
if (!maClipboard.empty())
InsertNodes(CloneList(maClipboard));
EndEdit();
}
std::unique_ptr<SmNodeList> SmCursor::CloneList(SmClipboard &rClipboard){
SmCloningVisitor aCloneFactory;
std::unique_ptr<SmNodeList> pClones(new SmNodeList);
for(auto &xNode : rClipboard){
SmNode *pClone = aCloneFactory.Clone(xNode.get());
pClones->push_back(pClone);
}
return pClones;
}
SmNode* SmCursor::FindTopMostNodeInLine(SmNode* pSNode, bool MoveUpIfSelected){
assert(pSNode);
//Move up parent until we find a node who's
//parent is NULL or isn't selected and not a type of:
// SmExpressionNode
// SmLineNode
// SmBinHorNode
// SmUnHorNode
// SmAlignNode
// SmFontNode
while(pSNode->GetParent() &&
((MoveUpIfSelected &&
pSNode->GetParent()->IsSelected()) ||
IsLineCompositionNode(pSNode->GetParent())))
pSNode = pSNode->GetParent();
//Now we have the selection line node
return pSNode;
}
SmNode* SmCursor::FindSelectedNode(SmNode* pNode){
if(pNode->GetNumSubNodes() == 0)
return nullptr;
for(auto pChild : *static_cast<SmStructureNode*>(pNode))
{
if(!pChild)
continue;
if(pChild->IsSelected())
return pChild;
SmNode* pRetVal = FindSelectedNode(pChild);
if(pRetVal)
return pRetVal;
}
return nullptr;
}
void SmCursor::LineToList(SmStructureNode* pLine, SmNodeList& list){
for(auto pChild : *pLine)
{
if (!pChild)
continue;
switch(pChild->GetType()){
case SmNodeType::Line:
case SmNodeType::UnHor:
case SmNodeType::Expression:
case SmNodeType::BinHor:
case SmNodeType::Align:
case SmNodeType::Font:
LineToList(static_cast<SmStructureNode*>(pChild), list);
break;
case SmNodeType::Error:
delete pChild;
break;
default:
list.push_back(pChild);
}
}
pLine->ClearSubNodes();
delete pLine;
}
void SmCursor::CloneLineToClipboard(SmStructureNode* pLine, SmClipboard* pClipboard){
SmCloningVisitor aCloneFactory;
for(auto pChild : *pLine)
{
if (!pChild)
continue;
if( IsLineCompositionNode( pChild ) )
CloneLineToClipboard( static_cast<SmStructureNode*>(pChild), pClipboard );
else if( pChild->IsSelected() && pChild->GetType() != SmNodeType::Error ) {
//Only clone selected text from SmTextNode
if(pChild->GetType() == SmNodeType::Text) {
SmTextNode *pText = static_cast<SmTextNode*>(pChild);
std::unique_ptr<SmTextNode> pClone(new SmTextNode( pChild->GetToken(), pText->GetFontDesc() ));
int start = pText->GetSelectionStart(),
length = pText->GetSelectionEnd() - pText->GetSelectionStart();
pClone->ChangeText(pText->GetText().copy(start, length));
pClone->SetScaleMode(pText->GetScaleMode());
pClipboard->push_back(std::move(pClone));
} else
pClipboard->push_back(std::unique_ptr<SmNode>(aCloneFactory.Clone(pChild)));
}
}
}
bool SmCursor::IsLineCompositionNode(SmNode const * pNode){
switch(pNode->GetType()){
case SmNodeType::Line:
case SmNodeType::UnHor:
case SmNodeType::Expression:
case SmNodeType::BinHor:
case SmNodeType::Align:
case SmNodeType::Font:
return true;
default:
return false;
}
}
int SmCursor::CountSelectedNodes(SmNode* pNode){
if(pNode->GetNumSubNodes() == 0)
return 0;
int nCount = 0;
for(auto pChild : *static_cast<SmStructureNode*>(pNode))
{
if (!pChild)
continue;
if(pChild->IsSelected() && !IsLineCompositionNode(pChild))
nCount++;
nCount += CountSelectedNodes(pChild);
}
return nCount;
}
bool SmCursor::HasComplexSelection(){
if(!HasSelection())
return false;
AnnotateSelection();
return CountSelectedNodes(mpTree) > 1;
}
void SmCursor::FinishEdit(std::unique_ptr<SmNodeList> pLineList,
SmStructureNode* pParent,
int nParentIndex,
SmCaretPos PosAfterEdit,
SmNode* pStartLine) {
//Store number of nodes in line for later
int entries = pLineList->size();
//Parse list of nodes to a tree
SmNodeListParser parser;
std::unique_ptr<SmNode> pLine(parser.Parse(pLineList.get()));
pLineList.reset();
//Check if we're making the body of a subsup node bigger than one
if(pParent->GetType() == SmNodeType::SubSup &&
nParentIndex == 0 &&
entries > 1) {
//Wrap pLine in scalable round brackets
SmToken aTok(TLEFT, '\0', "left", TG::NONE, 5);
std::unique_ptr<SmBraceNode> pBrace(new SmBraceNode(aTok));
pBrace->SetScaleMode(SmScaleMode::Height);
std::unique_ptr<SmNode> pLeft( CreateBracket(SmBracketType::Round, true) ),
pRight( CreateBracket(SmBracketType::Round, false) );
std::unique_ptr<SmBracebodyNode> pBody(new SmBracebodyNode(SmToken()));
pBody->SetSubNodes(std::move(pLine), nullptr);
pBrace->SetSubNodes(std::move(pLeft), std::move(pBody), std::move(pRight));
pBrace->Prepare(mpDocShell->GetFormat(), *mpDocShell, 0);
pLine = std::move(pBrace);
//TODO: Consider the following alternative behavior:
//Consider the line: A + {B + C}^D lsub E
//Here pLineList is B, + and C and pParent is a subsup node with
//both RSUP and LSUB set. Imagine the user just inserted "B +" in
//the body of the subsup node...
//The most natural thing to do would be to make the line like this:
//A + B lsub E + C ^ D
//E.g. apply LSUB and LSUP to the first element in pLineList and RSUP
//and RSUB to the last element in pLineList. But how should this act
//for CSUP and CSUB ???
//For this reason and because brackets was faster to implement, this solution
//have been chosen. It might be worth working on the other solution later...
}
//Set pStartLine if NULL
if(!pStartLine)
pStartLine = pLine.get();
//Insert it back into the parent
pParent->SetSubNode(nParentIndex, pLine.release());
//Rebuild graph of caret position
mpAnchor = nullptr;
mpPosition = nullptr;
BuildGraph();
AnnotateSelection(); //Update selection annotation!
//Set caret position
if(!SetCaretPosition(PosAfterEdit))
SetCaretPosition(SmCaretPos(pStartLine, 0));
//End edit section
EndEdit();
}
void SmCursor::BeginEdit(){
if(mnEditSections++ > 0) return;
mbIsEnabledSetModifiedSmDocShell = mpDocShell->IsEnableSetModified();
if( mbIsEnabledSetModifiedSmDocShell )
mpDocShell->EnableSetModified( false );
}
void SmCursor::EndEdit(){
if(--mnEditSections > 0) return;
mpDocShell->SetFormulaArranged(false);
//Okay, I don't know what this does... :)
//It's used in SmDocShell::SetText and with places where everything is modified.
//I think it does some magic, with sfx, but everything is totally undocumented so
//it's kinda hard to tell...
if ( mbIsEnabledSetModifiedSmDocShell )
mpDocShell->EnableSetModified( mbIsEnabledSetModifiedSmDocShell );
//I think this notifies people around us that we've modified this document...
mpDocShell->SetModified();
//I think SmDocShell uses this value when it sends an update graphics event
//Anyway comments elsewhere suggests it needs to be updated...
mpDocShell->mnModifyCount++;
//TODO: Consider copying the update accessibility code from SmDocShell::SetText in here...
//This somehow updates the size of SmGraphicView if it is running in embedded mode
if( mpDocShell->GetCreateMode() == SfxObjectCreateMode::EMBEDDED )
mpDocShell->OnDocumentPrinterChanged(nullptr);
//Request a repaint...
RequestRepaint();
//Update the edit engine and text of the document
OUString formula;
SmNodeToTextVisitor(mpTree, formula);
mpDocShell->maText = formula;
mpDocShell->GetEditEngine().QuickInsertText( formula, ESelection( 0, 0, EE_PARA_ALL, EE_TEXTPOS_ALL ) );
mpDocShell->GetEditEngine().QuickFormatDoc();
}
void SmCursor::RequestRepaint(){
SmViewShell *pViewSh = SmGetActiveView();
if( pViewSh ) {
if ( SfxObjectCreateMode::EMBEDDED == mpDocShell->GetCreateMode() )
mpDocShell->Repaint();
else
pViewSh->GetGraphicWidget().Invalidate();
}
}
bool SmCursor::IsAtTailOfBracket(SmBracketType eBracketType) const
{
const SmCaretPos pos = GetPosition();
if (!pos.IsValid()) {
return false;
}
SmNode* pNode = pos.pSelectedNode;
if (pNode->GetType() == SmNodeType::Text) {
SmTextNode* pTextNode = static_cast<SmTextNode*>(pNode);
if (pos.nIndex < pTextNode->GetText().getLength()) {
// The cursor is on a text node and at the middle of it.
return false;
}
} else {
if (pos.nIndex < 1) {
return false;
}
}
while (true) {
SmStructureNode* pParentNode = pNode->GetParent();
if (!pParentNode) {
// There's no brace body node in the ancestors.
return false;
}
int index = pParentNode->IndexOfSubNode(pNode);
assert(index >= 0);
if (static_cast<size_t>(index + 1) != pParentNode->GetNumSubNodes()) {
// The cursor is not at the tail at one of ancestor nodes.
return false;
}
pNode = pParentNode;
if (pNode->GetType() == SmNodeType::Bracebody) {
// Found the brace body node.
break;
}
}
SmStructureNode* pBraceNodeTmp = pNode->GetParent();
if (!pBraceNodeTmp || pBraceNodeTmp->GetType() != SmNodeType::Brace) {
// Brace node is invalid.
return false;
}
SmBraceNode* pBraceNode = static_cast<SmBraceNode*>(pBraceNodeTmp);
SmMathSymbolNode* pClosingNode = pBraceNode->ClosingBrace();
if (!pClosingNode) {
// Couldn't get closing symbol node.
return false;
}
// Check if the closing brace matches eBracketType.
SmTokenType eClosingTokenType = pClosingNode->GetToken().eType;
switch (eBracketType) {
case SmBracketType::Round: if (eClosingTokenType != TRPARENT) { return false; } break;
case SmBracketType::Square: if (eClosingTokenType != TRBRACKET) { return false; } break;
case SmBracketType::Curly: if (eClosingTokenType != TRBRACE) { return false; } break;
default:
return false;
}
return true;
}
/////////////////////////////////////// SmNodeListParser
SmNode* SmNodeListParser::Parse(SmNodeList* list){
pList = list;
//Delete error nodes
SmNodeList::iterator it = pList->begin();
while(it != pList->end()) {
if((*it)->GetType() == SmNodeType::Error){
//Delete and erase
delete *it;
it = pList->erase(it);
}else
++it;
}
SmNode* retval = Expression();
pList = nullptr;
return retval;
}
SmNode* SmNodeListParser::Expression(){
SmNodeArray NodeArray;
//Accept as many relations as there is
while(Terminal())
NodeArray.push_back(Relation());
//Create SmExpressionNode, I hope SmToken() will do :)
SmStructureNode* pExpr = new SmExpressionNode(SmToken());
pExpr->SetSubNodes(std::move(NodeArray));
return pExpr;
}
SmNode* SmNodeListParser::Relation(){
//Read a sum
std::unique_ptr<SmNode> pLeft(Sum());
//While we have tokens and the next is a relation
while(Terminal() && IsRelationOperator(Terminal()->GetToken())){
//Take the operator
std::unique_ptr<SmNode> pOper(Take());
//Find the right side of the relation
std::unique_ptr<SmNode> pRight(Sum());
//Create new SmBinHorNode
std::unique_ptr<SmStructureNode> pNewNode(new SmBinHorNode(SmToken()));
pNewNode->SetSubNodes(std::move(pLeft), std::move(pOper), std::move(pRight));
pLeft = std::move(pNewNode);
}
return pLeft.release();
}
SmNode* SmNodeListParser::Sum(){
//Read a product
std::unique_ptr<SmNode> pLeft(Product());
//While we have tokens and the next is a sum
while(Terminal() && IsSumOperator(Terminal()->GetToken())){
//Take the operator
std::unique_ptr<SmNode> pOper(Take());
//Find the right side of the sum
std::unique_ptr<SmNode> pRight(Product());
//Create new SmBinHorNode
std::unique_ptr<SmStructureNode> pNewNode(new SmBinHorNode(SmToken()));
pNewNode->SetSubNodes(std::move(pLeft), std::move(pOper), std::move(pRight));
pLeft = std::move(pNewNode);
}
return pLeft.release();
}
SmNode* SmNodeListParser::Product(){
//Read a Factor
std::unique_ptr<SmNode> pLeft(Factor());
//While we have tokens and the next is a product
while(Terminal() && IsProductOperator(Terminal()->GetToken())){
//Take the operator
std::unique_ptr<SmNode> pOper(Take());
//Find the right side of the operation
std::unique_ptr<SmNode> pRight(Factor());
//Create new SmBinHorNode
std::unique_ptr<SmStructureNode> pNewNode(new SmBinHorNode(SmToken()));
pNewNode->SetSubNodes(std::move(pLeft), std::move(pOper), std::move(pRight));
pLeft = std::move(pNewNode);
}
return pLeft.release();
}
SmNode* SmNodeListParser::Factor(){
//Read unary operations
if(!Terminal())
return Error();
//Take care of unary operators
else if(IsUnaryOperator(Terminal()->GetToken()))
{
SmStructureNode *pUnary = new SmUnHorNode(SmToken());
std::unique_ptr<SmNode> pOper(Terminal()),
pArg;
if(Next())
pArg.reset(Factor());
else
pArg.reset(Error());
pUnary->SetSubNodes(std::move(pOper), std::move(pArg));
return pUnary;
}
return Postfix();
}
SmNode* SmNodeListParser::Postfix(){
if(!Terminal())
return Error();
std::unique_ptr<SmNode> pArg;
if(IsPostfixOperator(Terminal()->GetToken()))
pArg.reset(Error());
else if(IsOperator(Terminal()->GetToken()))
return Error();
else
pArg.reset(Take());
while(Terminal() && IsPostfixOperator(Terminal()->GetToken())) {
std::unique_ptr<SmStructureNode> pUnary(new SmUnHorNode(SmToken()) );
std::unique_ptr<SmNode> pOper(Take());
pUnary->SetSubNodes(std::move(pArg), std::move(pOper));
pArg = std::move(pUnary);
}
return pArg.release();
}
SmNode* SmNodeListParser::Error(){
return new SmErrorNode(SmToken());
}
bool SmNodeListParser::IsOperator(const SmToken &token) {
return IsRelationOperator(token) ||
IsSumOperator(token) ||
IsProductOperator(token) ||
IsUnaryOperator(token) ||
IsPostfixOperator(token);
}
bool SmNodeListParser::IsRelationOperator(const SmToken &token) {
return bool(token.nGroup & TG::Relation);
}
bool SmNodeListParser::IsSumOperator(const SmToken &token) {
return bool(token.nGroup & TG::Sum);
}
bool SmNodeListParser::IsProductOperator(const SmToken &token) {
return token.nGroup & TG::Product &&
token.eType != TWIDESLASH &&
token.eType != TWIDEBACKSLASH &&
token.eType != TUNDERBRACE &&
token.eType != TOVERBRACE &&
token.eType != TOVER;
}
bool SmNodeListParser::IsUnaryOperator(const SmToken &token) {
return token.nGroup & TG::UnOper &&
(token.eType == TPLUS ||
token.eType == TMINUS ||
token.eType == TPLUSMINUS ||
token.eType == TMINUSPLUS ||
token.eType == TNEG ||
token.eType == TUOPER);
}
bool SmNodeListParser::IsPostfixOperator(const SmToken &token) {
return token.eType == TFACT;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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