4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
9 * Full author contact details are available in file CREDITS.
34 namespace lyx { namespace graphics { class PreviewLoader; } }
38 /// Common base class to all insets
40 // Do not add _any_ (non-static) data members as this would inflate
41 // everything storing large quantities of insets. Mathed e.g. would
47 typedef ptrdiff_t difference_type;
48 /// short of anything else reasonable
49 typedef size_t size_type;
50 /// type for cell indices
51 typedef size_t idx_type;
52 /// type for cursor positions
53 typedef ptrdiff_t pos_type;
54 /// type for row numbers
55 typedef size_t row_type;
56 /// type for column numbers
57 typedef size_t col_type;
59 /// virtual base class destructor
60 virtual ~InsetBase() {}
61 /// replicate ourselves
62 std::auto_ptr<InsetBase> clone() const;
64 /// identification as math inset
65 virtual MathInset * asMathInset() { return 0; }
66 /// true for 'math' math inset, but not for e.g. mbox
67 virtual bool inMathed() const { return false; }
69 /// the real dispatcher
70 void dispatch(LCursor & cur, FuncRequest & cmd);
72 * \returns true if this function made a definitive decision on
73 * whether the inset wants to handle the request \p cmd or not.
74 * The result of this decision is put into \p status.
76 * Every request that is enabled in this method needs to be handled
77 * in doDispatch(). Normally we have a 1:1 relationship between the
78 * requests handled in getStatus() and doDispatch(), but there are
80 * - A request that is disabled in getStatus() does not need to
81 * appear in doDispatch(). It is guaranteed that doDispatch()
82 * is never called with this request.
83 * - A few requests are en- or disabled in InsetBase::getStatus().
84 * These need to be handled in the doDispatch() methods of the
85 * derived insets, since InsetBase::doDispatch() has not enough
86 * information to handle them.
87 * - LFUN_MOUSE_* need not to be handled in getStatus(), because these
88 * are dispatched directly
90 virtual bool getStatus(LCursor & cur, FuncRequest const & cmd,
91 FuncStatus & status) const;
94 virtual void edit(LCursor & cur, bool left);
96 virtual InsetBase * editXY(LCursor & cur, int x, int y);
98 /// compute the size of the object returned in dim
99 virtual void metrics(MetricsInfo & mi, Dimension & dim) const = 0;
100 /// draw inset and update (xo, yo)-cache
101 virtual void draw(PainterInfo & pi, int x, int y) const = 0;
102 /// draw inset selection if necessary
103 virtual void drawSelection(PainterInfo &, int, int) const {}
105 virtual bool editing(BufferView * bv) const;
107 virtual bool showInsetDialog(BufferView *) const { return false; }
108 /// draw four angular markers
109 void drawMarkers(PainterInfo & pi, int x, int y) const;
110 /// draw two angular markers
111 void drawMarkers2(PainterInfo & pi, int x, int y) const;
112 /// add space for markers
113 void metricsMarkers(Dimension & dim, int framesize = 1) const;
114 /// add space for markers
115 void metricsMarkers2(Dimension & dim, int framesize = 1) const;
116 /// last drawn position for 'important' insets
118 /// last drawn position for 'important' insets
120 /// set x/y drawing position cache if available
121 virtual void setPosCache(PainterInfo const &, int, int) const {}
122 /// do we cover screen position x/y?
123 virtual bool covers(int x, int y) const;
124 /// get the screen positions of the cursor (see note in cursor.C)
125 virtual void cursorPos(CursorSlice const & sl, bool boundary,
126 int & x, int & y) const;
128 /// is this an inset that can be moved into?
129 virtual bool isActive() const { return nargs() > 0; }
130 /// Where should we go when we press the up or down cursor key?
131 virtual bool idxUpDown(LCursor & cur, bool up) const;
132 /// Move one cell to the left
133 virtual bool idxLeft(LCursor &) const { return false; }
134 /// Move one cell to the right
135 virtual bool idxRight(LCursor &) const { return false; }
137 /// Move one physical cell up
138 virtual bool idxNext(LCursor &) const { return false; }
139 /// Move one physical cell down
140 virtual bool idxPrev(LCursor &) const { return false; }
142 /// Target pos when we enter the inset from the left by pressing "Right"
143 virtual bool idxFirst(LCursor &) const { return false; }
144 /// Target pos when we enter the inset from the right by pressing "Left"
145 virtual bool idxLast(LCursor &) const { return false; }
147 /// Delete a cell and move cursor
148 virtual bool idxDelete(idx_type &) { return false; }
149 /// pulls cell after pressing erase
150 virtual void idxGlue(idx_type) {}
151 /// returns list of cell indices that are "between" from and to for
152 /// selection purposes
153 virtual bool idxBetween(idx_type idx, idx_type from, idx_type to) const;
155 /// to which column belongs a cell with a given index?
156 virtual col_type col(idx_type) const { return 0; }
157 /// to which row belongs a cell with a given index?
158 virtual row_type row(idx_type) const { return 0; }
159 /// cell idex corresponding to row and column;
160 virtual idx_type index(row_type row, col_type col) const;
161 /// any additional x-offset when drawing a cell?
162 virtual int cellXOffset(idx_type) const { return 0; }
163 /// any additional y-offset when drawing a cell?
164 virtual int cellYOffset(idx_type) const { return 0; }
165 /// number of embedded cells
166 virtual size_t nargs() const { return 0; }
167 /// number of rows in gridlike structures
168 virtual size_t nrows() const { return 0; }
169 /// number of columns in gridlike structures
170 virtual size_t ncols() const { return 0; }
171 /// is called when the cursor leaves this inset
172 virtual void notifyCursorLeaves(LCursor &) {}
174 /// request "external features"
175 virtual void validate(LaTeXFeatures &) const {}
176 /// Appends \c list with all labels found within this inset.
177 virtual void getLabelList(Buffer const &,
178 std::vector<std::string> & /* list */) const {}
180 /// describe content if cursor inside
181 virtual void infoize(std::ostream &) const {}
182 /// describe content if cursor behind
183 virtual void infoize2(std::ostream &) const {}
185 /// plain ascii output
186 virtual int plaintext(Buffer const &, std::ostream & os,
187 OutputParams const &) const;
189 virtual int linuxdoc(Buffer const &, std::ostream & os,
190 OutputParams const &) const;
192 virtual int docbook(Buffer const &, std::ostream & os,
193 OutputParams const &) const;
204 /// what appears in the minibuffer when opening
205 virtual std::string const editMessage() const;
207 virtual EDITABLE editable() const;
208 /// can we go further down on mouse click?
209 virtual bool descendable() const { return false; }
211 virtual bool isTextInset() const { return false; }
212 /// return true if the inset should be removed automatically
213 virtual bool autoDelete() const;
215 /** This is not quite the correct place for this enum. I think
216 the correct would be to let each subclass of Inset declare
217 its own enum code. Actually the notion of an InsetBase::Code
218 should be avoided, but I am not sure how this could be done
224 TOC_CODE, // do these insets really need a code? (ale)
284 MATHMACRO_CODE, // 30
315 /** returns the Code corresponding to the \c name.
316 * Eg, translate("branch") == BRANCH_CODE
318 static Code translate(std::string const & name);
320 /// returns true if the inset can hold an inset of given type
321 virtual bool insetAllowed(Code) const { return false; }
322 /// if this inset has paragraphs should they be output all as default
323 /// paragraphs with "Standard" layout?
324 virtual bool forceDefaultParagraphs(InsetBase const *) const { return false; }
327 virtual std::string const & getInsetName() const;
328 /// used to toggle insets
329 /// is the inset open?
330 /// should this inset be handled like a normal charater
331 virtual bool isChar() const { return false; }
332 /// is this equivalent to a letter?
333 virtual bool isLetter() const { return false; }
334 /// is this equivalent to a space (which is BTW different from
335 /// a line separator)?
336 virtual bool isSpace() const { return false; }
337 /// should we have a non-filled line before this inset?
338 virtual bool display() const { return false; }
339 /// should we break lines after this inset?
340 virtual bool isLineSeparator() const { return false; }
341 /// should paragraph indendation be ommitted in any case?
342 virtual bool neverIndent() const { return false; }
343 /// dumps content to lyxerr
344 virtual void dump() const;
345 /// write inset in .lyx format
346 virtual void write(Buffer const &, std::ostream &) const {}
347 /// read inset in .lyx format
348 virtual void read(Buffer const &, LyXLex &) {}
349 /// returns the number of rows (\n's) of generated tex code.
350 virtual int latex(Buffer const &, std::ostream &,
351 OutputParams const &) const { return 0; }
352 /// returns true to override begin and end inset in file
353 virtual bool directWrite() const;
355 virtual bool allowSpellCheck() const { return false; }
357 /// if this insets owns text cells (e.g. InsetText) return cell num
358 virtual LyXText * getText(int /*num*/) const { return 0; }
360 /** Adds a LaTeX snippet to the Preview Loader for transformation
361 * into a bitmap image. Does not start the laoding process.
363 * Most insets have no interest in this capability, so the method
366 virtual void addPreview(lyx::graphics::PreviewLoader &) const {}
368 /// returns LyX code associated with the inset. Used for TOC, ...)
369 virtual Code lyxCode() const { return NO_CODE; }
371 /// -1: text mode, 1: math mode, 0 undecided
372 enum mode_type {UNDECIDED_MODE, TEXT_MODE, MATH_MODE};
373 /// return text or mathmode if that is possible to determine
374 virtual mode_type currentMode() const { return UNDECIDED_MODE; }
375 /// returns whether this inset is allowed in other insets of given mode
376 virtual bool allowedIn(mode_type) const { return true; }
377 /// is this inset allowed within a font change?
378 virtual bool noFontChange() const { return false; }
380 /// mark the inset as erased or not
381 virtual void markErased(bool erased);
384 virtual int width() const { return 10; }
386 virtual int ascent() const { return 10; }
388 virtual int descent() const { return 10; }
390 int scroll() const { return 0; }
392 enum CollapseStatus {
398 virtual void setStatus(LCursor &, CollapseStatus) {}
401 InsetBase(InsetBase const &);
402 /** The real dispatcher.
403 * Gets normally called from LCursor::dispatch(). LCursor::dispatch()
404 * assumes the common case of 'LFUN handled, need update'.
405 * This has to be overriden by calling LCursor::undispatched() or
406 * LCursor::noUpdate() if appropriate.
407 * If you need to call the dispatch method of some inset directly
408 * you may have to explicitly request an update at that place. Don't
409 * do it in doDispatch(), since that causes nested updates when
410 * called from LCursor::dispatch(), and these can lead to crashes.
413 virtual void doDispatch(LCursor & cur, FuncRequest & cmd);
415 virtual std::auto_ptr<InsetBase> doClone() const = 0;
420 * returns true if pointer argument is valid
421 * and points to an editable inset
423 bool isEditableInset(InsetBase const * inset);
427 * returns true if pointer argument is valid
428 * and points to a highly editable inset
430 bool isHighlyEditableInset(InsetBase const * inset);