// -*- C++ -*- /** * \file insetbase.h * This file is part of LyX, the document processor. * Licence details can be found in the file COPYING. * * \author none * * Full author contact details are available in file CREDITS. */ #ifndef INSETBASE_H #define INSETBASE_H #include "support/docstring.h" #include #include #include class Buffer; class BufferView; class CursorSlice; class FuncRequest; class FuncStatus; class InsetMath; class InsetText; class LaTeXFeatures; class LCursor; class LyXLex; class LyXText; class MetricsInfo; class Dimension; class PainterInfo; class OutputParams; namespace lyx { namespace graphics { class PreviewLoader; } } /// Common base class to all insets // Do not add _any_ (non-static) data members as this would inflate // everything storing large quantities of insets. Mathed e.g. would // suffer. class InsetBase { public: /// typedef ptrdiff_t difference_type; /// short of anything else reasonable typedef size_t size_type; /// type for cell indices typedef size_t idx_type; /// type for cursor positions typedef ptrdiff_t pos_type; /// type for row numbers typedef size_t row_type; /// type for column numbers typedef size_t col_type; /// virtual base class destructor virtual ~InsetBase() {} /// replicate ourselves std::auto_ptr clone() const; /// identification as math inset virtual InsetMath * asInsetMath() { return 0; } /// true for 'math' math inset, but not for e.g. mbox virtual bool inMathed() const { return false; } /// the real dispatcher void dispatch(LCursor & cur, FuncRequest & cmd); /** * \returns true if this function made a definitive decision on * whether the inset wants to handle the request \p cmd or not. * The result of this decision is put into \p status. * * Every request that is enabled in this method needs to be handled * in doDispatch(). Normally we have a 1:1 relationship between the * requests handled in getStatus() and doDispatch(), but there are * some exceptions: * - A request that is disabled in getStatus() does not need to * appear in doDispatch(). It is guaranteed that doDispatch() * is never called with this request. * - A few requests are en- or disabled in InsetBase::getStatus(). * These need to be handled in the doDispatch() methods of the * derived insets, since InsetBase::doDispatch() has not enough * information to handle them. * - LFUN_MOUSE_* need not to be handled in getStatus(), because these * are dispatched directly */ virtual bool getStatus(LCursor & cur, FuncRequest const & cmd, FuncStatus & status) const; /// cursor enters virtual void edit(LCursor & cur, bool left); /// cursor enters virtual InsetBase * editXY(LCursor & cur, int x, int y); /// compute the size of the object returned in dim virtual void metrics(MetricsInfo & mi, Dimension & dim) const = 0; /// draw inset and update (xo, yo)-cache virtual void draw(PainterInfo & pi, int x, int y) const = 0; /// draw inset selection if necessary virtual void drawSelection(PainterInfo &, int, int) const {} /// virtual bool editing(BufferView * bv) const; /// virtual bool showInsetDialog(BufferView *) const { return false; } /// draw four angular markers void drawMarkers(PainterInfo & pi, int x, int y) const; /// draw two angular markers void drawMarkers2(PainterInfo & pi, int x, int y) const; /// add space for markers void metricsMarkers(Dimension & dim, int framesize = 1) const; /// add space for markers void metricsMarkers2(Dimension & dim, int framesize = 1) const; /// last drawn position for 'important' insets int xo() const; /// last drawn position for 'important' insets int yo() const; /// set x/y drawing position cache if available virtual void setPosCache(PainterInfo const &, int, int) const {} /// do we cover screen position x/y? virtual bool covers(int x, int y) const; /// get the screen positions of the cursor (see note in cursor.C) virtual void cursorPos(CursorSlice const & sl, bool boundary, int & x, int & y) const; /// is this an inset that can be moved into? virtual bool isActive() const { return nargs() > 0; } /// Where should we go when we press the up or down cursor key? virtual bool idxUpDown(LCursor & cur, bool up) const; /// Move one cell to the left virtual bool idxLeft(LCursor &) const { return false; } /// Move one cell to the right virtual bool idxRight(LCursor &) const { return false; } /// Move one physical cell up virtual bool idxNext(LCursor &) const { return false; } /// Move one physical cell down virtual bool idxPrev(LCursor &) const { return false; } /// Target pos when we enter the inset from the left by pressing "Right" virtual bool idxFirst(LCursor &) const { return false; } /// Target pos when we enter the inset from the right by pressing "Left" virtual bool idxLast(LCursor &) const { return false; } /// Delete a cell and move cursor virtual bool idxDelete(idx_type &) { return false; } /// pulls cell after pressing erase virtual void idxGlue(idx_type) {} /// returns list of cell indices that are "between" from and to for /// selection purposes virtual bool idxBetween(idx_type idx, idx_type from, idx_type to) const; /// to which column belongs a cell with a given index? virtual col_type col(idx_type) const { return 0; } /// to which row belongs a cell with a given index? virtual row_type row(idx_type) const { return 0; } /// cell idex corresponding to row and column; virtual idx_type index(row_type row, col_type col) const; /// any additional x-offset when drawing a cell? virtual int cellXOffset(idx_type) const { return 0; } /// any additional y-offset when drawing a cell? virtual int cellYOffset(idx_type) const { return 0; } /// number of embedded cells virtual size_t nargs() const { return 0; } /// number of rows in gridlike structures virtual size_t nrows() const { return 0; } /// number of columns in gridlike structures virtual size_t ncols() const { return 0; } /// is called when the cursor leaves this inset // returns true if cursor is now invalid. virtual bool notifyCursorLeaves(LCursor &) { return false; } /// request "external features" virtual void validate(LaTeXFeatures &) const {} /// Appends \c list with all labels found within this inset. virtual void getLabelList(Buffer const &, std::vector & /* list */) const {} /// describe content if cursor inside virtual void infoize(std::ostream &) const {} /// describe content if cursor behind virtual void infoize2(std::ostream &) const {} /// plain ascii output virtual int plaintext(Buffer const &, std::ostream & os, OutputParams const &) const; /// docbook output virtual int docbook(Buffer const &, std::ostream & os, OutputParams const &) const; /// the string that is passed to the TOC virtual int textString(Buffer const &, std::ostream &, OutputParams const &) const { return 0; }; /** This enum indicates by which means the inset can be modified: - NOT_EDITABLE: the inset's content can not be modified at all (e.g. printindex, insetspecialchar) - IS_EDITABLE: content can be edited via dialog (e.g. bibtex, index, url) - HIGHLY_EDITABLE: content can be edited on screen (normally means that insettext is contained, e.g. collapsables, tabular) */ // FIXME: This has not yet been fully implemented to math insets enum EDITABLE { /// NOT_EDITABLE = 0, /// IS_EDITABLE, /// HIGHLY_EDITABLE }; /// what appears in the minibuffer when opening virtual lyx::docstring const editMessage() const; /// virtual EDITABLE editable() const; /// can we go further down on mouse click? virtual bool descendable() const { return false; } /// does this contain text that can be change track marked in DVI? virtual bool canTrackChanges() const { return false; } /// is this inset based on the TextInset class? virtual InsetText const * asTextInset() const { return 0; } /// return true if the inset should be removed automatically virtual bool autoDelete() const; /** This is not quite the correct place for this enum. I think the correct would be to let each subclass of Inset declare its own enum code. Actually the notion of an InsetBase::Code should be avoided, but I am not sure how this could be done in a cleaner way. */ enum Code { /// NO_CODE, // 0 /// TOC_CODE, // do these insets really need a code? (ale) /// QUOTE_CODE, /// MARK_CODE, /// REF_CODE, /// URL_CODE, // 5 /// HTMLURL_CODE, /// SEPARATOR_CODE, /// ENDING_CODE, /// LABEL_CODE, /// NOTE_CODE, // 10 /// ACCENT_CODE, /// MATH_CODE, /// INDEX_CODE, /// INCLUDE_CODE, /// GRAPHICS_CODE, // 15 /// BIBITEM_CODE, /// BIBTEX_CODE, /// TEXT_CODE, /// ERT_CODE, /// FOOT_CODE, // 20 /// MARGIN_CODE, /// FLOAT_CODE, /// WRAP_CODE, /// SPACE_CODE, // 25 /// SPECIALCHAR_CODE, /// TABULAR_CODE, /// EXTERNAL_CODE, #if 0 /// THEOREM_CODE, #endif /// CAPTION_CODE, /// MATHMACRO_CODE, // 30 /// CITE_CODE, /// FLOAT_LIST_CODE, /// INDEX_PRINT_CODE, /// OPTARG_CODE, // 35 /// ENVIRONMENT_CODE, /// HFILL_CODE, /// NEWLINE_CODE, /// LINE_CODE, /// BRANCH_CODE, // 40 /// BOX_CODE, /// CHARSTYLE_CODE, /// VSPACE_CODE, /// MATHMACROARG_CODE }; /** returns the Code corresponding to the \c name. * Eg, translate("branch") == BRANCH_CODE */ static Code translate(std::string const & name); /// returns true if the inset can hold an inset of given type virtual bool insetAllowed(Code) const { return false; } /// if this inset has paragraphs should they be output all as default /// paragraphs with "Standard" layout? virtual bool forceDefaultParagraphs(idx_type) const { return false; } /// virtual std::string const & getInsetName() const; /// used to toggle insets /// is the inset open? /// should this inset be handled like a normal charater virtual bool isChar() const { return false; } /// is this equivalent to a letter? virtual bool isLetter() const { return false; } /// is this equivalent to a space (which is BTW different from /// a line separator)? virtual bool isSpace() const { return false; } /// should we have a non-filled line before this inset? virtual bool display() const { return false; } /// should we break lines after this inset? virtual bool isLineSeparator() const { return false; } /// should paragraph indendation be ommitted in any case? virtual bool neverIndent() const { return false; } /// dumps content to lyxerr virtual void dump() const; /// write inset in .lyx format virtual void write(Buffer const &, std::ostream &) const {} /// read inset in .lyx format virtual void read(Buffer const &, LyXLex &) {} /// returns the number of rows (\n's) of generated tex code. virtual int latex(Buffer const &, std::ostream &, OutputParams const &) const { return 0; } /// returns true to override begin and end inset in file virtual bool directWrite() const; /// virtual bool allowSpellCheck() const { return false; } /// if this insets owns text cells (e.g. InsetText) return cell num virtual LyXText * getText(int /*num*/) const { return 0; } /** Adds a LaTeX snippet to the Preview Loader for transformation * into a bitmap image. Does not start the laoding process. * * Most insets have no interest in this capability, so the method * defaults to empty. */ virtual void addPreview(lyx::graphics::PreviewLoader &) const {} public: /// returns LyX code associated with the inset. Used for TOC, ...) virtual Code lyxCode() const { return NO_CODE; } /// -1: text mode, 1: math mode, 0 undecided enum mode_type {UNDECIDED_MODE, TEXT_MODE, MATH_MODE}; /// return text or mathmode if that is possible to determine virtual mode_type currentMode() const { return UNDECIDED_MODE; } /// returns whether this inset is allowed in other insets of given mode virtual bool allowedIn(mode_type) const { return true; } /** * Is this inset allowed within a font change? * * FIXME: noFontChange means currently that the font change is closed * in LaTeX before the inset, and that the contents of the inset * will be in default font. This should be changed so that the inset * changes the font again. */ virtual bool noFontChange() const { return false; } /// mark the inset as erased or not virtual void markErased(bool erased); /// pretty arbitrary virtual int width() const { return 10; } /// pretty arbitrary virtual int ascent() const { return 10; } /// pretty arbitrary virtual int descent() const { return 10; } /// int scroll() const { return 0; } /// enum CollapseStatus { Collapsed, Inlined, Open }; /// virtual void setStatus(LCursor &, CollapseStatus) {} protected: InsetBase(); InsetBase(InsetBase const &); /** The real dispatcher. * Gets normally called from LCursor::dispatch(). LCursor::dispatch() * assumes the common case of 'LFUN handled, need update'. * This has to be overriden by calling LCursor::undispatched() or * LCursor::noUpdate() if appropriate. * If you need to call the dispatch method of some inset directly * you may have to explicitly request an update at that place. Don't * do it in doDispatch(), since that causes nested updates when * called from LCursor::dispatch(), and these can lead to crashes. * \sa getStatus */ virtual void doDispatch(LCursor & cur, FuncRequest & cmd); private: virtual std::auto_ptr doClone() const = 0; }; /** * returns true if pointer argument is valid * and points to an editable inset */ bool isEditableInset(InsetBase const * inset); /** * returns true if pointer argument is valid * and points to a highly editable inset */ bool isHighlyEditableInset(InsetBase const * inset); #endif