// -*- C++ -*- /** * \file Inset.h * This file is part of LyX, the document processor. * Licence details can be found in the file COPYING. * * \author Alejandro Aguilar Sierra * \author Jürgen Vigna * \author Lars Gullik Bjønnes * \author Matthias Ettrich * * Full author contact details are available in file CREDITS. */ #ifndef INSETBASE_H #define INSETBASE_H #include "ColorCode.h" #include "InsetCode.h" #include "support/strfwd.h" #include "support/types.h" namespace lyx { class BiblioInfo; class Buffer; class BufferParams; class BufferView; class Change; class CompletionList; class Cursor; class CursorSlice; class Dimension; class DocIterator; class FuncRequest; class FuncStatus; class InsetCollapsable; class InsetIterator; class InsetLayout; class InsetList; class InsetMath; class InsetText; class LaTeXFeatures; class Lexer; class MathAtom; class MetricsInfo; class OutputParams; class PainterInfo; class ParConstIterator; class ParIterator; class Text; class TocList; class EmbeddedFile; class EmbeddedFileList; namespace graphics { class PreviewLoader; } /** returns the InsetCode corresponding to the \c name. * Eg, insetCode("branch") == BRANCH_CODE * Implemented in 'Inset.cpp'. */ InsetCode insetCode(std::string const & name); /// the other way std::string insetName(InsetCode); /// 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 Inset { public: /// enum EntryDirection { ENTRY_DIRECTION_IGNORE, ENTRY_DIRECTION_RIGHT, ENTRY_DIRECTION_LEFT, }; /// 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 ~Inset() {} /// change associated Buffer /// FIXME this should go. virtual void setBuffer(Buffer & buffer); /// retrieve associated Buffer virtual Buffer & buffer(); virtual Buffer const & buffer() const; /// initialize view for this inset. /** * This is typically used after this inset is created interactively. * Intented purpose is to sanitize internal state with regard to current * Buffer. The default implementation calls updateLabels(buffer()) is * the inset is labeled. * * \sa isLabeled() **/ virtual void initView(); /// \return true if this inset is labeled. virtual bool isLabeled() const { return false; } /// 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; } /// is this inset based on the InsetText class? virtual InsetText * asInsetText() { return 0; } /// is this inset based on the InsetText class? virtual InsetText const * asInsetText() const { return 0; } /// is this inset based on the InsetCollapsable class? virtual InsetCollapsable * asInsetCollapsable() { return 0; } /// is this inset based on the InsetCollapsable class? virtual InsetCollapsable const * asInsetCollapsable() const { return 0; } /// the real dispatcher void dispatch(Cursor & 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 Inset::getStatus(). * These need to be handled in the doDispatch() methods of the * derived insets, since Inset::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(Cursor & cur, FuncRequest const & cmd, FuncStatus & status) const; /// cursor enters virtual void edit(Cursor & cur, bool front, EntryDirection entry_from = ENTRY_DIRECTION_IGNORE); /// cursor enters virtual Inset * editXY(Cursor & cur, int x, int y); /// compute the size of the object returned in dim /// \retval true if metrics changed. 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 const * bv) const; /// virtual bool showInsetDialog(BufferView *) const { return false; } /// draw inset decoration if necessary. /// This can use \c drawMarkers() for example. virtual void drawDecoration(PainterInfo &, int, int) const {} /// 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(BufferView const & bv) const; /// last drawn position for 'important' insets int yo(BufferView const & bv) const; /// set x/y drawing position cache if available virtual void setPosCache(PainterInfo const &, int, int) const; /// void setDimCache(MetricsInfo const &, Dimension const &) const; /// do we cover screen position x/y? virtual bool covers(BufferView const & bv, int x, int y) const; /// get the screen positions of the cursor (see note in Cursor.cpp) virtual void cursorPos(BufferView const & bv, CursorSlice const & sl, bool boundary, int & x, int & y) const; /// virtual bool isFreeSpacing() const { return false; } /// virtual bool allowEmpty() const { return false; } /// Force inset into LTR environment if surroundings are RTL? virtual bool forceLTR() const { return false; } /// is this an inset that can be moved into? /// FIXME: merge with editable() virtual bool isActive() const { return nargs() > 0; } /// Where should we go when we press the up or down cursor key? virtual bool idxUpDown(Cursor & cur, bool up) const; /// Move one cell backwards virtual bool idxBackward(Cursor &) const { return false; } /// Move one cell forward virtual bool idxForward(Cursor &) const { return false; } /// Move to the next cell virtual bool idxNext(Cursor &) const { return false; } /// Move to the previous cell virtual bool idxPrev(Cursor &) const { return false; } /// Target pos when we enter the inset while moving forward virtual bool idxFirst(Cursor &) const { return false; } /// Target pos when we enter the inset while moving backwards virtual bool idxLast(Cursor &) 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 index 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, e.g. if former /// insets in higher cursor slices of \c old do not exist /// anymore. /// \c old is the old cursor, i.e. there is a slice pointing to this. /// \c cur is the new cursor. Use the update flags to cause a redraw. virtual bool notifyCursorLeaves(Cursor const & /*old*/, Cursor & /*cur*/) { return false; } /// is called when the mouse enter or leave this inset /// return true if this inset needs repaint virtual bool setMouseHover(bool) { return false; } /// return true if this inset is hovered (under mouse) /// This is by now only used by mathed to draw corners /// (Inset::drawMarkers() and Inset::drawMarkers2()). /// Other insets do not have to redefine this function to /// return the correct status of mouseHovered. virtual bool mouseHovered() const { return false; } /// request "external features" virtual void validate(LaTeXFeatures &) const {} /// describe content if cursor inside virtual void infoize(odocstream &) const {} /// describe content if cursor behind virtual void infoize2(odocstream &) const {} enum { PLAINTEXT_NEWLINE = 10000 }; /// plain text output in ucs4 encoding /// return the number of characters; in case of multiple lines of /// output, add PLAINTEXT_NEWLINE to the number of chars in the last line virtual int plaintext(odocstream &, OutputParams const &) const = 0; /// docbook output virtual int docbook(odocstream & os, OutputParams const &) const; /// the string that is passed to the TOC virtual void textString(odocstream &) const {} /** This enum indicates by which means the inset can be modified: - NOT_EDITABLE: the inset's content cannot be modified at all (e.g. printindex, insetspecialchar) - IS_EDITABLE: content can be edited via dialog (e.g. bibtex, index, href) - 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 docstring 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; } /// return true if the inset should be removed automatically virtual bool autoDelete() const; /// Returns true if the inset supports completions. virtual bool completionSupported(Cursor const &) const { return false; } /// Returns true if the inset supports inline completions at the /// cursor position. In this case the completion might be stored /// in the BufferView's inlineCompletion property. virtual bool inlineCompletionSupported(Cursor const & /*cur*/) const { return false; } /// Return true if the inline completion should be automatic. virtual bool automaticInlineCompletion() const { return true; } /// Return true if the popup completion should be automatic. virtual bool automaticPopupCompletion() const { return true; } /// Return true if the cursor should indicate a completion. virtual bool showCompletionCursor() const { return true; } /// Returns completion suggestions at cursor position. Return an /// null pointer if no completion is a available or possible. /// The caller is responsible to free the returned object! virtual CompletionList const * createCompletionList(Cursor const &) const { return 0; } /// Returns the completion prefix to filter the suggestions for completion. /// This is only called if completionList returned a non-null list. virtual docstring completionPrefix(Cursor const &) const; /// Do a completion at the cursor position. Return true on success. /// The completion does not contain the prefix. If finished is true, the /// completion is final. If finished is false, completion might only be /// a partial completion. virtual bool insertCompletion(Cursor & /*cur*/, docstring const & /*completion*/, bool /*finished*/) { return false; } /// Get the completion inset position and size virtual void completionPosAndDim(Cursor const &, int & /*x*/, int & /*y*/, Dimension & /*dim*/) const {} /// returns true if the inset can hold an inset of given type virtual bool insetAllowed(InsetCode) const { return false; } /// should this inset use the empty layout by default rather than /// the standard layout? (default: only if that is forced.) virtual bool useEmptyLayout() const { return forceEmptyLayout(); } /// if this inset has paragraphs should they be forced to use the /// empty layout? virtual bool forceEmptyLayout(idx_type = 0) const { return false; } /// if this inset has paragraphs should the user be allowed to /// customize alignment, etc? virtual bool allowParagraphCustomization(idx_type = 0) const { return true; } /// Is the width forced to some value? virtual bool hasFixedWidth() const { return false; } /// \return Tool tip for this inset. /// This default implementation returns an empty string. virtual docstring toolTip(BufferView const & bv, int x, int y) const; /// \return Context menu identifier for this inset. /// This default implementation returns an empty string. virtual docstring contextMenu(BufferView const & bv, int x, int y) const; // FIXME This should really disappear in favor of // docstring name() const { return from_ascii(insetName(lyxCode()))); } // There's no reason to be using different names in different places. // But to do this we would need to change the file format, since the names // used there don't correspond to what is used here. /// virtual docstring name() const; /// virtual InsetLayout const & getLayout(BufferParams const & bp) 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; } /// is this an expandible space (rubber length)? virtual bool isStretchableSpace() const { return false; } enum DisplayType { Inline = 0, AlignLeft, AlignCenter, AlignRight }; /// should we have a non-filled line before this inset? virtual DisplayType display() const { return Inline; } /// 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(std::ostream &) const {} /// read inset in .lyx format virtual void read(Lexer &) {} /** Export the inset to LaTeX. * Don't use a temporary stringstream if the final output is * supposed to go to a file. * \sa Buffer::writeLaTeXSource for the reason. * \return the number of rows (\n's) of generated LaTeX code. */ virtual int latex(odocstream &, 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 Text * 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(graphics::PreviewLoader &) const {} /// Add an entry to the TocList /// pit is the ParConstIterator of the paragraph containing the inset virtual void addToToc(ParConstIterator const &) const {} /// report files that can be embedded with the lyx file virtual void registerEmbeddedFiles(EmbeddedFileList &) const {} /// update the properties of an embedded file of an inset /// the name of the embedded file should not change. virtual void updateEmbeddedFile(EmbeddedFile const &) {} /// Fill keys with BibTeX information virtual void fillWithBibKeys(BiblioInfo &, InsetIterator const &) const {} /// Update the counters of this inset and of its contents virtual void updateLabels(ParIterator const &) {} /// Updates the inset's dialog virtual Buffer const * updateFrontend() const; public: /// returns LyX code associated with the inset. Used for TOC, ...) virtual InsetCode 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; } /// set the change for the entire inset virtual void setChange(Change const &) {} /// accept the changes within the inset virtual void acceptChanges(BufferParams const &) {}; /// reject the changes within the inset virtual void rejectChanges(BufferParams const &) {}; /// virtual Dimension const dimension(BufferView const &) const; /// int scroll() const { return 0; } /// virtual ColorCode backgroundColor() const; /// enum CollapseStatus { Collapsed, Open }; /// virtual void setStatus(Cursor &, CollapseStatus) {} // enum { TEXT_TO_INSET_OFFSET = 4 }; protected: /// Constructor explicit Inset() : buffer_(0) {} /// replicate ourselves friend class InsetList; friend class MathAtom; virtual Inset * clone() const = 0; /** The real dispatcher. * Gets normally called from Cursor::dispatch(). Cursor::dispatch() * assumes the common case of 'LFUN handled, need update'. * This has to be overriden by calling Cursor::undispatched() or * Cursor::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 Cursor::dispatch(), and these can lead to crashes. * \sa getStatus */ virtual void doDispatch(Cursor & cur, FuncRequest & cmd); Buffer * buffer_; }; } // namespace lyx #endif