/* -*- 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 . */ /** The SmNode is the basic structure of formula data. * * Each token is stored in one node of specific kind. * They can have SmNodeType. It allows to identify node type after abstraction. * Here goes the subclasses tree: * * SmRect * SmNode * SmStructureNode Head of tree diagram * SmTableNode binom * SmLineNode A line * SmExpressionNode { content } * SmUnHorNode unary operators +-; -+; +x; -x; ... * SmRootNode Root structure * SmBinHorNode binary operators A + B * SmBinVerNode over; frac; ... * SmBinDiagonalNode wideslash * SmSubSupNode csub, csup, lsub, from, to, ... * SmBraceNode (); []; left lbrace right rbrace; ... * SmBracebodyNode ( content ); [ content ]; ... * SmVerticalBraceNode overbrace; underbrace; * SmOperNode sum from to; int from to; * SmAlignNode text alignment * SmAttributeNode font attributes; bold; * SmFontNode font serif; ... * SmMatrixNode matrix * SmVisibleNode drawable node * SmGraphicNode graphics display * SmRectangleNode * SmPolyLineNode overline; underline; widehat; ... * SmBlankNode blank space; ~; ... * SmTextNode "text"; func functname; ... * SmSpecialNode * SmGlyphSpecialNode %symbolname * SmMathSymbolNode math symbols * SmMathIdentifierNode variable * SmRootSymbolNode root symbol * SmPlaceNode * SmErrorNode red ? for errors * */ #pragma once #include "types.hxx" #include "token.hxx" #include "rect.hxx" #include "format.hxx" #include "nodetype.hxx" #include #include enum class FontAttribute { None = 0x0000, Bold = 0x0001, Italic = 0x0002 }; namespace o3tl { template<> struct typed_flags : is_typed_flags {}; } enum class FontSizeType { ABSOLUT = 1, PLUS = 2, MINUS = 3, MULTIPLY = 4, DIVIDE = 5 }; // flags to interdict respective status changes enum class FontChangeMask { None = 0x0000, Face = 0x0001, Size = 0x0002, Bold = 0x0004, Italic = 0x0008, Color = 0x0010, Phantom = 0x0020 }; namespace o3tl { template<> struct typed_flags : is_typed_flags {}; } class SmVisitor; class SmDocShell; class SmNode; class SmStructureNode; typedef std::vector< SmNode * > SmNodeArray; enum class SmScaleMode { None, Width, Height }; class SmNode : public SmRect { // Rendering info for SmRect SmFace maFace; // Anclage to the code SmToken maNodeToken; ESelection m_aESelection; // Node information SmNodeType meType; SmScaleMode meScaleMode; RectHorAlign meRectHorAlign; FontChangeMask mnFlags; FontAttribute mnAttributes; bool mbIsPhantom; bool mbIsSelected; // index in accessible text; -1 if not (yet) applicable sal_Int32 mnAccIndex; protected: SmNode(SmNodeType eNodeType, const SmToken &rNodeToken); public: SmNode(const SmNode&) = delete; SmNode& operator=(const SmNode&) = delete; virtual ~SmNode(); /** * Checks node visibility. * Returns true if this is an instance of SmVisibleNode's subclass, false otherwise. * @return node visibility */ virtual bool IsVisible() const = 0; /** * Gets the number of subnodes. * @return number of subnodes */ virtual size_t GetNumSubNodes() const = 0; /** * Gets the subnode of index nIndex. * @param nIndex * @return subnode of index nIndex */ virtual SmNode * GetSubNode(size_t nIndex) = 0; const SmNode * GetSubNode(size_t nIndex) const { return const_cast(this)->GetSubNode(nIndex); } virtual const SmNode * GetLeftMost() const; /** * Gets the FontChangeMask flags. * @return FontChangeMask flags */ FontChangeMask &Flags() { return mnFlags; } /** * Gets the font attributes. * @return font attributes */ FontAttribute &Attributes() { return mnAttributes; } /** * Checks if it is a visible node rendered invisible. * @return rendered visibility */ bool IsPhantom() const { return mbIsPhantom; } /** * Sets the render visibility of a visible node to bIsPhantom. * @param bIsPhantom * @return */ void SetPhantom(bool bIsPhantom); /** * Sets the font color. * @param rColor * @return */ void SetColor(const Color &rColor); /** * Sets the font attribute nAttrib. * Check FontAttribute class. * @param nAttrib * @return */ void SetAttribute(FontAttribute nAttrib); /** * Clears the font attribute nAttrib. * Check FontAttribute class. * @param nAttrib * @return */ void ClearAttribute(FontAttribute nAttrib); /** * Gets the font. * @return font */ const SmFace & GetFont() const { return maFace; }; SmFace & GetFont() { return maFace; }; /** * Sets the font to rFace. * @param rFace * @return */ void SetFont(const SmFace &rFace); /** * Sets the font size to rRelSize with type nType. * Check FontSizeType for details. * @param rRelSize * @param nType * @return */ void SetFontSize(const Fraction &rRelSize, FontSizeType nType); /** * Sets the font size to rRelSize with type FontSizeType::ABSOLUT. * @param rScale * @return */ void SetSize(const Fraction &rScale); /** * Prepare preliminary settings about font and text * (e.g. maFace, meRectHorAlign, mnFlags, mnAttributes, etc.) * @param rFormat * @param rDocShell * @param nDepth * @return */ virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth); /** * Prepare preliminary font attributes * Called on Prepare(...). * @return */ void PrepareAttributes(); /** * Sets the alignment of the text. * Check RectHorAlign class for details. * The subtrees will be affected if bApplyToSubTree. * @param eHorAlign * @param bApplyToSubTree * @return */ void SetRectHorAlign(RectHorAlign eHorAlign, bool bApplyToSubTree = true ); /** * Gets the alignment of the text. * @return alignment of the text */ RectHorAlign GetRectHorAlign() const { return meRectHorAlign; } /** * Parses itself to SmRect. * @return this */ const SmRect & GetRect() const { return *this; } /** * Moves the rectangle by rVector. * @param rVector * @return */ void Move(const Point &rVector); /** * Moves the rectangle to rPoint, being the top left corner the origin. * @param rPoint * @return */ void MoveTo(const Point &rPoint) { Move(rPoint - GetTopLeft()); } /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) = 0; /** * Appends to rText the node text. * @param rText * @return */ virtual void GetAccessibleText( OUStringBuffer &rText ) const = 0; /** * Gets the node accessible index. * Used for visual editing. * @return node accessible index */ sal_Int32 GetAccessibleIndex() const { return mnAccIndex; } /** * Sets the node accessible index to nAccIndex. * Used for visual editing. * @param nAccIndex * @return */ void SetAccessibleIndex(sal_Int32 nAccIndex) { mnAccIndex = nAccIndex; } /** * Finds the node with accessible index nAccIndex. * Used for visual editing. * @param nAccIndex * @return node with accessible index nAccIndex */ const SmNode * FindNodeWithAccessibleIndex(sal_Int32 nAccIndex) const; /** * Gets the line in the text where the node is located. * It is used to do the visual <-> text correspondence. * @return line */ sal_uInt16 GetRow() const { return sal::static_int_cast(m_aESelection.nStartPara); } /** * Gets the column of the line in the text where the node is located. * It is used to do the visual <-> text correspondence. * @return column */ sal_uInt16 GetColumn() const { return sal::static_int_cast(m_aESelection.nStartPos); } /** * Gets the scale mode. * @return scale mode */ SmScaleMode GetScaleMode() const { return meScaleMode; } /** * Sets the scale mode to eMode. * @param eMode * @return */ void SetScaleMode(SmScaleMode eMode) { meScaleMode = eMode; } //visual stuff TODO comment virtual void AdaptToX(OutputDevice &rDev, sal_uLong nWidth); virtual void AdaptToY(OutputDevice &rDev, sal_uLong nHeight); /** * Gets the node type. * @return node type */ SmNodeType GetType() const { return meType; } /** * Gets the token. * The token contains the data extracted from the text mode. * Ej: text, type (sub, sup, int,...), row and column,... * @return node type */ const SmToken & GetToken() const { return maNodeToken; } SmToken & GetToken() { return maNodeToken; } /** * Gets node position in input text. * @return node position in input text */ const ESelection& GetSelection() const { return m_aESelection; } /** * Gets node position in input text. * @param aESelection */ void SetSelection(ESelection aESelection) { m_aESelection = aESelection; } /** * Finds the node from the position in the text. * It is used to do the visual <-> text correspondence. * @param nRow * @param nCol * @return the given node */ const SmNode * FindTokenAt(sal_uInt16 nRow, sal_uInt16 nCol) const; /** * Finds the closest rectangle in the screen. * @param rPoint * @return the given node */ const SmNode * FindRectClosestTo(const Point &rPoint) const; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ virtual void Accept(SmVisitor* pVisitor) = 0; /** * Checks if the node is selected. * @return the node is selected */ bool IsSelected() const {return mbIsSelected;} /** * Sets the node to Selected. * @param Selected * @return */ void SetSelected(bool Selected) {mbIsSelected = Selected;} /** * Gets the parent node of this node. * @return parent node */ const SmStructureNode* GetParent() const { return mpParentNode; } SmStructureNode* GetParent() { return mpParentNode; } /** * Sets the parent node. * @param parent * @return */ void SetParent(SmStructureNode* parent){ mpParentNode = parent; } /** * Sets the token for this node. * @param token * @return */ void SetToken(SmToken const & token){ maNodeToken = token; } private: SmStructureNode* mpParentNode; }; /** Abstract baseclass for all composite node * * Subclasses of this class can have subnodes. Nodes that doesn't derivate from * this class does not have subnodes. */ class SmStructureNode : public SmNode { SmNodeArray maSubNodes; protected: SmStructureNode(SmNodeType eNodeType, const SmToken &rNodeToken, size_t nSize = 0) : SmNode(eNodeType, rNodeToken) , maSubNodes(nSize) {} public: virtual ~SmStructureNode() override; /** * Checks node visibility. * Returns true if this is an instance of SmVisibleNode's subclass, false otherwise. * @return node visibility */ virtual bool IsVisible() const override; /** * Gets the number of subnodes. * @return number of subnodes */ virtual size_t GetNumSubNodes() const override; /** * Gets the subnode of index nIndex. * @param nIndex * @return subnode of index nIndex */ using SmNode::GetSubNode; virtual SmNode * GetSubNode(size_t nIndex) override; /** * Gets the subnode of index nIndex, used for operators. * @param nIndex * @return subnode of index nIndex */ SmNode * GetSubNodeBinMo(size_t nIndex) const; /** * Does the cleaning of the subnodes. * @return */ void ClearSubNodes(); /** * Sets subnodes, used for operators. * @param pFirst * @param pSecond * @param pThird * @return */ void SetSubNodes(std::unique_ptr pFirst, std::unique_ptr pSecond, std::unique_ptr pThird = nullptr); /** * Sets subnodes. * @param pFirst * @param pSecond * @param pThird * @return */ void SetSubNodes(SmNode* pFirst, SmNode* pSecond, SmNode* pThird); /** * Sets subnodes, used for operators. * The data is reordered so the items are correctly ordered. * @param pFirst * @param pSecond * @param pThird * @return */ void SetSubNodesBinMo(std::unique_ptr pFirst, std::unique_ptr pSecond, std::unique_ptr pThird = nullptr); /** * Sets subnodes, used for operators. * The data is reordered so the items are correctly ordered. * @param pFirst * @param pSecond * @param pThird * @return */ void SetSubNodesBinMo(SmNode* pFirst, SmNode* pSecond, SmNode* pThird); /** * Sets subnodes. * @param rNodeArray * @return */ void SetSubNodes(SmNodeArray&& rNodeArray); /** * Appends to rText the node text. * @param rText * @return */ virtual void GetAccessibleText( OUStringBuffer &rText ) const override; /** * Gets the first subnode. * @return first subnode */ SmNodeArray::iterator begin() {return maSubNodes.begin();} /** * Gets the last subnode. * @return last subnode */ SmNodeArray::iterator end() {return maSubNodes.end();} /** * Gets the last subnode. * @return last subnode */ SmNodeArray::reverse_iterator rbegin() {return maSubNodes.rbegin();} /** * Gets the first subnode. * @return first subnode */ SmNodeArray::reverse_iterator rend() {return maSubNodes.rend();} /** * Get the index of the child node pSubNode. * Returns -1, if pSubNode isn't a subnode of this. * @param pSubNode * @return index of the child node */ int IndexOfSubNode(SmNode const * pSubNode); /** * Sets the subnode pNode at nIndex. * If necessary increases the subnodes length. * @param nIndex * @param pNode * @return */ void SetSubNode(size_t nIndex, SmNode* pNode); private: /** Sets parent on children of this node */ void ClaimPaternity(); }; /** Abstract base class for all visible node * * Nodes that doesn't derivate from this class doesn't draw anything, but their * children. */ class SmVisibleNode : public SmNode { protected: SmVisibleNode(SmNodeType eNodeType, const SmToken &rNodeToken) : SmNode(eNodeType, rNodeToken) {} public: /** * Checks node visibility. * Returns true if this is an instance of SmVisibleNode's subclass, false otherwise. * @return node visibility */ virtual bool IsVisible() const override; /** * Gets the number of subnodes. * @return number of subnodes */ virtual size_t GetNumSubNodes() const override; /** * Gets the subnode of index nIndex. * @param nIndex * @return subnode of index nIndex */ using SmNode::GetSubNode; virtual SmNode * GetSubNode(size_t nIndex) override; }; class SmGraphicNode : public SmVisibleNode { protected: SmGraphicNode(SmNodeType eNodeType, const SmToken &rNodeToken) : SmVisibleNode(eNodeType, rNodeToken) {} public: /** * Appends to rText the node text. * @param rText * @return */ virtual void GetAccessibleText( OUStringBuffer &rText ) const override; }; /** Draws a rectangle * * Used for drawing the line in the OVER and OVERSTRIKE commands. */ class SmRectangleNode final : public SmGraphicNode { Size maToSize; public: explicit SmRectangleNode(const SmToken &rNodeToken) : SmGraphicNode(SmNodeType::Rectangle, rNodeToken) {} //visual stuff TODO comment virtual void AdaptToX(OutputDevice &rDev, sal_uLong nWidth) override; virtual void AdaptToY(OutputDevice &rDev, sal_uLong nHeight) override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Polygon line node * * Used to draw the slash of the WIDESLASH command by SmBinDiagonalNode. */ class SmPolyLineNode final : public SmGraphicNode { tools::Polygon maPoly; Size maToSize; tools::Long mnWidth; public: explicit SmPolyLineNode(const SmToken &rNodeToken); /** * Gets the width of the rect. * @return width */ tools::Long GetWidth() const { return mnWidth; } /** * Gets the polygon to draw the node. * @return polygon */ tools::Polygon &GetPolygon() { return maPoly; } //visual stuff TODO comment virtual void AdaptToX(OutputDevice &rDev, sal_uLong nWidth) override; virtual void AdaptToY(OutputDevice &rDev, sal_uLong nHeight) override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Text node * * @remarks This class also serves as baseclass for all nodes that contains text. */ class SmTextNode : public SmVisibleNode { protected: OUString maText; sal_uInt16 mnFontDesc; /** Index within text where the selection starts * @remarks Only valid if SmNode::IsSelected() is true */ sal_Int32 mnSelectionStart; /** Index within text where the selection ends * @remarks Only valid if SmNode::IsSelected() is true */ sal_Int32 mnSelectionEnd; protected: SmTextNode(SmNodeType eNodeType, const SmToken &rNodeToken, sal_uInt16 nFontDescP ); public: SmTextNode(const SmToken &rNodeToken, sal_uInt16 nFontDescP ); /** * Returns the font type being used (text, variable, symbol, ...). * @return font type */ sal_uInt16 GetFontDesc() const { return mnFontDesc; } /** * Sets the node text to rText. * @param rText * @return */ void SetText(const OUString &rText) { maText = rText; } /** * Gets the node text. * @return node text */ const OUString & GetText() const { return maText; } OUString & GetText() { return maText; } /** * Change the text of this node, including the underlying token to rText. * @param rText * @return */ void ChangeText(const OUString &rText); /** * Try to guess the correct FontDesc, used during visual editing * @return */ void AdjustFontDesc(); /** * Index within GetText() where the selection starts. * @remarks Only valid of SmNode::IsSelected() is true. * @return index. */ sal_Int32 GetSelectionStart() const { return mnSelectionStart; } /** * Index within GetText() where the selection ends. * @remarks Only valid of SmNode::IsSelected() is true. * @return index. */ sal_Int32 GetSelectionEnd() const {return mnSelectionEnd; } /** * Sets the index within GetText() where the selection starts to index. * @param index * @return */ void SetSelectionStart(sal_Int32 index) {mnSelectionStart = index;} /** * Sets the index within GetText() where the selection ends to index. * @param index * @return */ void SetSelectionEnd(sal_Int32 index) {mnSelectionEnd = index;} /** * Prepare preliminary settings about font and text * (e.g. maFace, meRectHorAlign, mnFlags, mnAttributes, etc.) * @param rFormat * @param rDocShell * @param nDepth * @return */ virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth) override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Appends to rText the node text. * @param rText * @return */ virtual void GetAccessibleText( OUStringBuffer &rText ) const override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; /** * Converts the character from StarMath's private area symbols to a matching Unicode * character, if necessary. To be used when converting GetText() to a normal text. * @param nIn * @return unicode char */ static sal_Unicode ConvertSymbolToUnicode(sal_Unicode nIn); }; /** Special node for user defined characters * * Node used for pre- and user-defined characters from: * officecfg/registry/data/org/openoffice/Office/Math.xcu * * This is just single characters, I think. */ class SmSpecialNode : public SmTextNode { bool mbIsFromGreekSymbolSet; protected: SmSpecialNode(SmNodeType eNodeType, const SmToken &rNodeToken, sal_uInt16 _nFontDesc); public: explicit SmSpecialNode(const SmToken &rNodeToken); /** * Prepare preliminary settings about font and text * (e.g. maFace, meRectHorAlign, mnFlags, mnAttributes, etc.) * @param rFormat * @param rDocShell * @param nDepth * @return */ virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth) override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Glyph node for custom operators * * This node is used with commands: oper, uoper and boper. * E.g. in "A boper op B", "op" will be an instance of SmGlyphSpecialNode. * "boper" simply interprets "op", the following token, as a binary operator. * The command "uoper" interprets the following token as unary operator. * For these commands an instance of SmGlyphSpecialNode is used for the * operator token, following the command. */ class SmGlyphSpecialNode final : public SmSpecialNode { public: explicit SmGlyphSpecialNode(const SmToken &rNodeToken) : SmSpecialNode(SmNodeType::GlyphSpecial, rNodeToken, FNT_MATH) {} /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Math symbol node * * Use for math symbols such as plus, minus and integral in the INT command. */ class SmMathSymbolNode : public SmSpecialNode { protected: SmMathSymbolNode(SmNodeType eNodeType, const SmToken &rNodeToken) : SmSpecialNode(eNodeType, rNodeToken, FNT_MATH) { SetText(GetToken().cMathChar); } public: explicit SmMathSymbolNode(const SmToken &rNodeToken); //visual stuff TODO comment virtual void AdaptToX(OutputDevice &rDev, sal_uLong nWidth) override; virtual void AdaptToY(OutputDevice &rDev, sal_uLong nHeight) override; /** * Prepare preliminary settings about font and text * (e.g. maFace, meRectHorAlign, mnFlags, mnAttributes, etc.) * @param rFormat * @param rDocShell * @param nDepth * @return */ virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth) override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Math Identifier * * This behaves essentially the same as SmMathSymbolNode and is only used to * represent math symbols that should be exported as elements rather than * elements. */ class SmMathIdentifierNode final : public SmMathSymbolNode { public: explicit SmMathIdentifierNode(const SmToken &rNodeToken) : SmMathSymbolNode(SmNodeType::MathIdent, rNodeToken) {} }; /** Root symbol node * * Root symbol node used by SmRootNode to create the root symbol, in front of * the line with the line above. I don't think this node should be used for * anything else. */ class SmRootSymbolNode final : public SmMathSymbolNode { sal_uLong mnBodyWidth; // width of body (argument) of root sign public: explicit SmRootSymbolNode(const SmToken &rNodeToken) : SmMathSymbolNode(SmNodeType::RootSymbol, rNodeToken) , mnBodyWidth(0) { } /** * Gets the body width. * Allows to know how long is the root and paint it. * @return body width */ sal_uLong GetBodyWidth() const {return mnBodyWidth;}; //visual stuff TODO comment virtual void AdaptToX(OutputDevice &rDev, sal_uLong nHeight) override; virtual void AdaptToY(OutputDevice &rDev, sal_uLong nHeight) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Place node * * Used to create the command, that denotes place where something can be * written. * It is drawn as a square with a shadow. */ class SmPlaceNode final : public SmMathSymbolNode { public: explicit SmPlaceNode(const SmToken &rNodeToken) : SmMathSymbolNode(SmNodeType::Place, rNodeToken) { } SmPlaceNode() : SmMathSymbolNode(SmNodeType::Place, SmToken(TPLACE, MS_PLACE, "")) { }; /** * Prepare preliminary settings about font and text * (e.g. maFace, meRectHorAlign, mnFlags, mnAttributes, etc.) * @param rFormat * @param rDocShell * @param nDepth * @return */ virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth) override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Error node, for parsing errors * * This node is used for parsing errors and draws a questionmark turned upside * down (inverted question mark). */ class SmErrorNode final : public SmMathSymbolNode { public: explicit SmErrorNode(const SmToken &rNodeToken) : SmMathSymbolNode(SmNodeType::Error, rNodeToken) { SetText(OUString(MS_ERROR)); } /** * Prepare preliminary settings about font and text * (e.g. maFace, meRectHorAlign, mnFlags, mnAttributes, etc.) * @param rFormat * @param rDocShell * @param nDepth * @return */ virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth) override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Table node * * This is the root node for the formula tree. This node is also used for the * STACK and BINOM commands. When used for root node, its * children are instances of SmLineNode, and in some obscure cases the child * can be an instance of SmExpressionNode, mainly when errors occur. */ class SmTableNode final : public SmStructureNode { tools::Long mnFormulaBaseline; public: explicit SmTableNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::Table, rNodeToken) , mnFormulaBaseline(0) { } virtual const SmNode * GetLeftMost() const override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Gets the formula baseline. * @return formula baseline */ tools::Long GetFormulaBaseline() const; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** A line * * Used as child of SmTableNode when the SmTableNode is the root node of the * formula tree. */ class SmLineNode : public SmStructureNode { bool mbUseExtraSpaces; protected: SmLineNode(SmNodeType eNodeType, const SmToken &rNodeToken) : SmStructureNode(eNodeType, rNodeToken) , mbUseExtraSpaces(true) { } public: explicit SmLineNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::Line, rNodeToken) , mbUseExtraSpaces(true) { } /** * Sets if it going to use extra spaces. * It is used to set if there has to be space between node while rendering. * By default it is true. * @param bVal * @return */ void SetUseExtraSpaces(bool bVal) { mbUseExtraSpaces = bVal; } /** * Checks if it is using extra spaces. * It is used for calculating space between nodes when rendering. * By default it is true. * @return is using extra spaces */ bool IsUseExtraSpaces() const { return mbUseExtraSpaces; }; /** * Prepare preliminary settings about font and text * (e.g. maFace, meRectHorAlign, mnFlags, mnAttributes, etc.) * @param rFormat * @param rDocShell * @param nDepth * @return */ virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth) override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Expression node * * Used whenever you have an expression such as "A OVER {B + C}", here there is * an expression node that allows "B + C" to be the denominator of the * SmBinVerNode, that the OVER command creates. */ class SmExpressionNode final : public SmLineNode { public: explicit SmExpressionNode(const SmToken &rNodeToken) : SmLineNode(SmNodeType::Expression, rNodeToken) { } /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Unary horizontal node * * The same as SmBinHorNode except this is for unary operators. */ class SmUnHorNode final : public SmStructureNode { public: explicit SmUnHorNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::UnHor, rNodeToken, 2) { } /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Root node * * Used for create square roots and other roots, example: * \f$ \sqrt[\mbox{[Argument]}]{\mbox{[Body]}} \f$. * * Children:
* 0: Argument (optional)
* 1: Symbol (instance of SmRootSymbolNode)
* 2: Body
* Where argument is optional and may be NULL. */ class SmRootNode final : public SmStructureNode { public: explicit SmRootNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::Root, rNodeToken, 3) { } /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; /** * Returns the node containing the data of the order of the root. * @return order data */ const SmNode* Argument() const { return const_cast(this)->Argument(); } SmNode* Argument() { assert( GetNumSubNodes() == 3 ); return GetSubNode( 0 ); } /** * Returns the node containing the data of the character used for the root. * @return symbol data */ const SmRootSymbolNode* Symbol() const { return const_cast(this)->Symbol(); } SmRootSymbolNode* Symbol() { assert( GetNumSubNodes() == 3 ); assert( GetSubNode( 1 )->GetType() == SmNodeType::RootSymbol ); return static_cast< SmRootSymbolNode* > ( GetSubNode( 1 )); } /** * Returns the node containing the data inside the root. * @return body data */ const SmNode* Body() const { return const_cast(this)->Body(); } SmNode* Body() { assert( GetNumSubNodes() == 3 ); return GetSubNode( 2 ); } }; /** Binary horizontal node * * This node is used for binary operators. In a formula such as "A + B". * * Children:
* 0: Left operand
* 1: Binary operator
* 2: Right operand
* * None of the children may be NULL. */ class SmBinHorNode final : public SmStructureNode { public: explicit SmBinHorNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::BinHor, rNodeToken, 3) { } /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; /** * Returns the node containing the data of the binary operator. * @return symbol data */ const SmNode* Symbol() const { return const_cast(this)->Symbol(); } SmNode* Symbol() { assert( GetNumSubNodes() == 3 ); return GetSubNode( 1 ); } /** * Returns the node containing the data of the left operand. * @return left operand data */ const SmNode* LeftOperand() const { return const_cast(this)->LeftOperand(); } SmNode* LeftOperand() { assert( GetNumSubNodes() == 3 ); return GetSubNode( 0 ); } /** * Returns the node containing the data of the right operand. * @return right operand data */ const SmNode* RightOperand() const { return const_cast(this)->RightOperand(); } SmNode* RightOperand() { assert( GetNumSubNodes() == 3 ); return GetSubNode( 2 ); } }; /** Binary horizontal node * * This node is used for creating the OVER command, consider the formula: * "numerator OVER denominator", which looks like * \f$ \frac{\mbox{numerator}}{\mbox{denominator}} \f$ * * Children:
* 0: Numerator
* 1: Line (instance of SmRectangleNode)
* 2: Denominator
* None of the children may be NULL. */ class SmBinVerNode final : public SmStructureNode { public: explicit SmBinVerNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::BinVer, rNodeToken, 3) { } virtual const SmNode * GetLeftMost() const override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Binary diagonal node * * Used for implementing the WIDESLASH command, example: "A WIDESLASH B". * * Children:
* 0: Left operand
* 1: right operand
* 2: Line (instance of SmPolyLineNode).
* None of the children may be NULL. */ class SmBinDiagonalNode final : public SmStructureNode { bool mbAscending; /** * Returns the position and size of the diagonal line by reference. * @param rPos * @param rSize * @param rDiagPoint * @param fAngleDeg * @return position and size of the diagonal line */ void GetOperPosSize(Point &rPos, Size &rSize, const Point &rDiagPoint, double fAngleDeg) const; public: explicit SmBinDiagonalNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::BinDiagonal, rNodeToken, 3) , mbAscending(false) { } /** * Checks if it is of ascending type. * Ascending: * / b * / * a / * Descending: * a \ * \ * \ b * @return ascending. */ bool IsAscending() const { return mbAscending; } /** * Sets if the wideslash is ascending to bVal. * @param bVal * @return */ void SetAscending(bool bVal) { mbAscending = bVal; } /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Enum used to index sub-/supscripts in the 'maSubNodes' array * in 'SmSubSupNode' * * See graphic for positions at char: * * \code * CSUP * * LSUP H H RSUP * H H * HHHH * H H * LSUB H H RSUB * * CSUB * \endcode */ enum SmSubSup { CSUB, CSUP, RSUB, RSUP, LSUB, LSUP }; /** numbers of entries in the above enum (that is: the number of possible * sub-/supscripts) */ #define SUBSUP_NUM_ENTRIES 6 /** Super- and subscript node * * Used for creating super- and subscripts for commands such as: * "^", "_", "lsup", "lsub", "csup" and "csub". * Example: "A^2" which looks like: \f$ A^2 \f$ * * This node is also used for creating limits on SmOperNode, when * "FROM" and "TO" commands are used with "INT", "SUM" or similar. * * Children of this node can be enumerated using the SmSubSup enum. * Please note that children may be NULL, except for the body. * It is recommended that you access children using GetBody() and * GetSubSup(). */ class SmSubSupNode final : public SmStructureNode { bool mbUseLimits; public: explicit SmSubSupNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::SubSup, rNodeToken, 1 + SUBSUP_NUM_ENTRIES) , mbUseLimits(false) { } /** * Returns the node with the data of what has to be superindex or subindex. * @return body data */ const SmNode * GetBody() const { return const_cast(this)->GetBody(); } SmNode * GetBody() { return GetSubNode(0); } /** * Checks if it is going to be used for a limit. * Example lim from { x toward 0 } { {sin x}over x } = 1 * @return is a limit */ bool IsUseLimits() const { return mbUseLimits; }; /** * Sets if it is going to be used for a limit to bVal. * @param bVal * @return */ void SetUseLimits(bool bVal) { mbUseLimits = bVal; } /** * Gets the node with the data of what has to be superindex or subindex. * The position to check is given by eSubSup. * @remarks this method may return NULL. * @param eSubSup * @return body data */ const SmNode * GetSubSup(SmSubSup eSubSup) const { return const_cast< SmSubSupNode* > ( this )->GetSubSup( eSubSup ); } SmNode * GetSubSup(SmSubSup eSubSup) { return GetSubNode(1 + eSubSup); }; /** * Sets the node with the data of what has to be superindex or subindex. * @param pScript */ void SetBody(SmNode* pBody) { SetSubNode(0, pBody); } /** * Sets the node with the data of what has to be superindex or subindex. * The position to check is given by eSubSup. * @param eSubSup * @param pScript */ void SetSubSup(SmSubSup eSubSup, SmNode* pScript) { SetSubNode( 1 + eSubSup, pScript); } /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Node for brace construction * * Used for "lbrace [body] rbrace" and similar constructions. * Should look like \f$ \{\mbox{[body]}\} \f$ * * Children:
* 0: Opening brace
* 1: Body (usually SmBracebodyNode)
* 2: Closing brace
* None of the children can be NULL. * * Note that child 1 (Body) is usually SmBracebodyNode, but it can also be e.g. SmExpressionNode. */ class SmBraceNode final : public SmStructureNode { public: explicit SmBraceNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::Brace, rNodeToken, 3) { } /** * Returns the node containing the data of the opening brace. * @return opening brace data */ const SmMathSymbolNode* OpeningBrace() const { return const_cast (this)->OpeningBrace(); } SmMathSymbolNode* OpeningBrace() { assert( GetNumSubNodes() == 3 ); assert( GetSubNode( 0 )->GetType() == SmNodeType::Math ); return static_cast< SmMathSymbolNode* > ( GetSubNode( 0 )); } /** * Returns the node containing the data of what is between braces. * @return body data */ const SmNode* Body() const { return const_cast(this)->Body(); } SmNode* Body() { assert( GetNumSubNodes() == 3 ); return GetSubNode( 1 ); } /** * Returns the node containing the data of the closing brace. * @return closing brace data */ const SmMathSymbolNode* ClosingBrace() const { return const_cast (this)->ClosingBrace(); } SmMathSymbolNode* ClosingBrace() { assert( GetNumSubNodes() == 3 ); assert( GetSubNode( 2 )->GetType() == SmNodeType::Math ); return static_cast< SmMathSymbolNode* > ( GetSubNode( 2 )); } /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Body of an SmBraceNode * * This usually only has one child an SmExpressionNode, however, it can also * have other children. * Consider the formula "lbrace [body1] mline [body2] rbrace", looks like: * \f$ \{\mbox{[body1] | [body2]}\} \f$. * In this case SmBracebodyNode will have three children, "[body1]", "|" and * [body2]. */ class SmBracebodyNode final : public SmStructureNode { tools::Long mnBodyHeight; public: explicit SmBracebodyNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::Bracebody, rNodeToken) , mnBodyHeight(0) { } /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; tools::Long GetBodyHeight() const { return mnBodyHeight; } /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Node for vertical brace construction * * Used to implement commands "[body] underbrace [script]" and * "[body] overbrace [script]". * Underbrace should look like this \f$ \underbrace{\mbox{body}}_{\mbox{script}}\f$. * * Children:
* 0: body
* 1: brace
* 2: script
* (None of these children are optional, e.g. they must all be not NULL). */ class SmVerticalBraceNode final : public SmStructureNode { public: explicit SmVerticalBraceNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::VerticalBrace, rNodeToken, 3) { } /** * Returns the node containing the data of what the brace is pointing for. * body { script } * @return body data */ const SmNode* Body() const { return const_cast(this)->Body(); } SmNode* Body() { assert( GetNumSubNodes() == 3 ); return GetSubNode( 0 ); } /** * Returns the node containing the data of the brace. * @return brace data */ const SmMathSymbolNode* Brace() const { return const_cast (this)->Brace(); } SmMathSymbolNode* Brace() { assert( GetNumSubNodes() == 3 ); assert( GetSubNode( 1 )->GetType() == SmNodeType::Math ); return static_cast< SmMathSymbolNode* > ( GetSubNode( 1 )); } /** * Returns the node containing the data of what is in the brace. * body { script } * @return opening brace data */ const SmNode* Script() const { return const_cast(this)->Script(); } SmNode* Script() { assert( GetNumSubNodes() == 3 ); return GetSubNode( 2 ); } /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Operation Node * * Used for commands like SUM, INT and similar. * * Children:
* 0: Operation (instance of SmMathSymbolNode or SmSubSupNode)
* 1: Body
* None of the children may be NULL. * */ class SmOperNode final : public SmStructureNode { public: explicit SmOperNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::Oper, rNodeToken, 2) { } /** * Returns the node with the operator data * @return operator data */ const SmNode * GetSymbol() const { return const_cast(this)->GetSymbol(); } SmNode * GetSymbol(); /** * Returns the height of the node in base to the symbol * ( rSymbol contains the operator data ) * and the font format ( rFormat ). * @param rSymbol * @param rFormat * @return node's height */ tools::Long CalcSymbolHeight(const SmNode &rSymbol, const SmFormat &rFormat) const; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Node used for alignment * * This node has exactly one child at index 0. */ class SmAlignNode final : public SmStructureNode { public: explicit SmAlignNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::Align, rNodeToken) { } /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Attribute node * * Used to give an attribute to another node. Used for commands such as: * UNDERLINE, OVERLINE, OVERSTRIKE, WIDEVEC, WIDEHARPOON, WIDEHAT and WIDETILDE. * * Children:
* 0: Attribute
* 1: Body
* None of these may be NULL. */ class SmAttributeNode final : public SmStructureNode { public: explicit SmAttributeNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::Attribute, rNodeToken, 2) {} /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; /** * Gets the attribute data. * @return attribute data */ const SmNode* Attribute() const { return const_cast(this)->Attribute(); } SmNode* Attribute() { assert( GetNumSubNodes() == 2 ); return GetSubNode( 0 ); } /** * Gets the body data ( the nodes affected by the attribute ). * @return body data */ const SmNode* Body() const { return const_cast(this)->Body(); } SmNode* Body() { assert( GetNumSubNodes() == 2 ); return GetSubNode( 1 ); } }; /** Font node * * Used to change the font of its children. */ class SmFontNode final : public SmStructureNode { FontSizeType meSizeType; Fraction maFontSize; public: explicit SmFontNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::Font, rNodeToken) , meSizeType(FontSizeType::MULTIPLY) , maFontSize(1) { } /** * Sets font size to rValue in nType mode. * Check FontSizeType for details. * @param rValue * @param nType * @return */ void SetSizeParameter(const Fraction &rValue, FontSizeType nType) { meSizeType = nType; maFontSize = rValue; } /** * Returns the font size. * @return font size. */ const Fraction & GetSizeParameter() const {return maFontSize;} /** * Returns the font size type. * Check FontSizeType for details. * @return font size type. */ FontSizeType GetSizeType() const {return meSizeType;} /** * Prepare preliminary settings about font and text * (e.g. maFace, meRectHorAlign, mnFlags, mnAttributes, etc.) * @param rFormat * @param rDocShell * @param nDepth * @return */ virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth) override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Matrix node * * Used to implement the MATRIX command, example: * "matrix{ 1 # 2 ## 3 # 4}". */ class SmMatrixNode final : public SmStructureNode { sal_uInt16 mnNumRows, mnNumCols; public: explicit SmMatrixNode(const SmToken &rNodeToken) : SmStructureNode(SmNodeType::Matrix, rNodeToken) , mnNumRows(0) , mnNumCols(0) { } /** * Gets the number of rows of the matrix. * @return rows number */ sal_uInt16 GetNumRows() const {return mnNumRows;} /** * Gets the number of columns of the matrix. * @return columns number */ sal_uInt16 GetNumCols() const {return mnNumCols;} /** * Sets the dimensions of the matrix. * @param nMatrixRows * @param nMatrixCols * @return */ void SetRowCol(sal_uInt16 nMatrixRows, sal_uInt16 nMatrixCols) { mnNumRows = nMatrixRows; mnNumCols = nMatrixCols; } virtual const SmNode * GetLeftMost() const override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /** Node for whitespace * * Used to implement the commands "~" and "`". This node is just a blank space. */ class SmBlankNode final : public SmGraphicNode { sal_uInt16 mnNum; public: explicit SmBlankNode(const SmToken &rNodeToken) : SmGraphicNode(SmNodeType::Blank, rNodeToken) , mnNum(0) { } void IncreaseBy(const SmToken &rToken, sal_uInt32 nMultiplyBy = 1); void Clear() { mnNum = 0; } sal_uInt16 GetBlankNum() const { return mnNum; } void SetBlankNum(sal_uInt16 nNumber) { mnNum = nNumber; } /** * Prepare preliminary settings about font and text * (e.g. maFace, meRectHorAlign, mnFlags, mnAttributes, etc.) * @param rFormat * @param rDocShell * @param nDepth * @return */ virtual void Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell, int nDepth) override; /** * Prepares the SmRect to render. * @param rDev * @param rFormat * @return */ virtual void Arrange(OutputDevice &rDev, const SmFormat &rFormat) override; /** * Accept a visitor. * Calls the method for this class on the visitor. * @param pVisitor * @return */ void Accept(SmVisitor* pVisitor) override; }; /* vim:set shiftwidth=4 softtabstop=4 expandtab: */