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.
15 #include <boost/assert.hpp>
39 namespace lyx { namespace graphics { class PreviewLoader; } }
43 /// Common base class to all insets
45 // Do not add _any_ (non-static) data members as this would inflate
46 // everything storing large quantities of insets. Mathed e.g. would
52 typedef ptrdiff_t difference_type;
53 /// short of anything else reasonable
54 typedef size_t size_type;
55 /// type for cell indices
56 typedef size_t idx_type;
57 /// type for cursor positions
58 typedef ptrdiff_t pos_type;
59 /// type for row numbers
60 typedef size_t row_type;
61 /// type for column numbers
62 typedef size_t col_type;
64 /// virtual base class destructor
65 virtual ~InsetBase() {}
66 /// replicate ourselves
67 std::auto_ptr<InsetBase> clone() const
69 std::auto_ptr<InsetBase> b = doClone();
70 BOOST_ASSERT(typeid(*b) == typeid(*this));
75 /// identification as math inset
76 virtual MathInset * asMathInset() { return 0; }
77 /// identification as non-math inset
78 virtual UpdatableInset * asUpdatableInset() { return 0; }
79 /// true for 'math' math inset, but not for e.g. mbox
80 virtual bool inMathed() const { return false; }
82 /// the real dispatcher
83 void dispatch(LCursor & cur, FuncRequest & cmd);
85 * \returns true if this function made a definitive decision on
86 * whether the inset wants to handle the request \p cmd or not.
87 * The result of this decision is put into \p status.
89 * Every request that is enabled in this method needs to be handled
90 * in doDispatch(). Normally we have a 1:1 relationship between the
91 * requests handled in getStatus() and doDispatch(), but there are
93 * - A request that is disabled in getStatus() does not need to
94 * appear in doDispatch(). It is guaranteed that doDispatch()
95 * is never called with this request.
96 * - A few requests are en- or disabled in InsetBase::getStatus().
97 * These need to be handled in the doDispatch() methods of the
98 * derived insets, since InsetBase::doDispatch() has not enough
99 * information to handle them.
100 * - LFUN_MOUSE_* need not to be handled in getStatus(), because these
101 * are dispatched directly
103 virtual bool getStatus(LCursor & cur, FuncRequest const & cmd,
104 FuncStatus & status) const;
107 virtual void edit(LCursor & cur, bool left);
109 virtual InsetBase * editXY(LCursor & cur, int x, int y);
111 /// compute the size of the object returned in dim
112 virtual void metrics(MetricsInfo & mi, Dimension & dim) const = 0;
113 /// draw inset and update (xo, yo)-cache
114 virtual void draw(PainterInfo & pi, int x, int y) const = 0;
115 /// draw inset selection if necessary
116 virtual void drawSelection(PainterInfo &, int, int) const {}
118 virtual bool editing(BufferView * bv) const;
119 /// draw four angular markers
120 void drawMarkers(PainterInfo & pi, int x, int y) const;
121 /// draw two angular markers
122 void drawMarkers2(PainterInfo & pi, int x, int y) const;
123 /// add space for markers
124 void metricsMarkers(Dimension & dim, int framesize = 1) const;
125 /// add space for markers
126 void metricsMarkers2(Dimension & dim, int framesize = 1) const;
127 /// last drawn position for 'important' insets
129 /// last drawn position for 'important' insets
131 /// set x/y drawing position cache if available
132 virtual void setPosCache(PainterInfo const &, int, int) const {}
133 /// do we cover screen position x/y?
134 virtual bool covers(int x, int y) const;
135 /// get the screen positions of the cursor (see note in cursor.C)
136 virtual void cursorPos(CursorSlice const & sl, bool boundary,
137 int & x, int & y) const;
139 /// is this an inset that can be moved into?
140 virtual bool isActive() const { return nargs() > 0; }
141 /// Where should we go when we press the up or down cursor key?
142 virtual bool idxUpDown(LCursor & cur, bool up) const;
143 /// Move one cell to the left
144 virtual bool idxLeft(LCursor &) const { return false; }
145 /// Move one cell to the right
146 virtual bool idxRight(LCursor &) const { return false; }
148 /// Move one physical cell up
149 virtual bool idxNext(LCursor &) const { return false; }
150 /// Move one physical cell down
151 virtual bool idxPrev(LCursor &) const { return false; }
153 /// Target pos when we enter the inset from the left by pressing "Right"
154 virtual bool idxFirst(LCursor &) const { return false; }
155 /// Target pos when we enter the inset from the right by pressing "Left"
156 virtual bool idxLast(LCursor &) const { return false; }
158 /// Delete a cell and move cursor
159 virtual bool idxDelete(idx_type &) { return false; }
160 /// pulls cell after pressing erase
161 virtual void idxGlue(idx_type) {}
162 /// returns list of cell indices that are "between" from and to for
163 /// selection purposes
164 virtual bool idxBetween(idx_type idx, idx_type from, idx_type to) const;
166 /// to which column belongs a cell with a given index?
167 virtual col_type col(idx_type) const { return 0; }
168 /// to which row belongs a cell with a given index?
169 virtual row_type row(idx_type) const { return 0; }
170 /// cell idex corresponding to row and column;
171 virtual idx_type index(row_type row, col_type col) const;
172 /// any additional x-offset when drawing a cell?
173 virtual int cellXOffset(idx_type) const { return 0; }
174 /// any additional y-offset when drawing a cell?
175 virtual int cellYOffset(idx_type) const { return 0; }
176 /// number of embedded cells
177 virtual size_t nargs() const { return 0; }
178 /// number of rows in gridlike structures
179 virtual size_t nrows() const { return 0; }
180 /// number of columns in gridlike structures
181 virtual size_t ncols() const { return 0; }
182 /// is called when the cursor leaves this inset
183 virtual void notifyCursorLeaves(LCursor &) {}
185 /// request "external features"
186 virtual void validate(LaTeXFeatures &) const {}
187 /// Appends \c list with all labels found within this inset.
188 virtual void getLabelList(Buffer const &,
189 std::vector<std::string> & /* list */) const {}
191 /// describe content if cursor inside
192 virtual void infoize(std::ostream &) const {}
193 /// describe content if cursor behind
194 virtual void infoize2(std::ostream &) const {}
196 /// plain ascii output
197 virtual int plaintext(Buffer const &, std::ostream & os,
198 OutputParams const &) const;
200 virtual int linuxdoc(Buffer const &, std::ostream & os,
201 OutputParams const &) const;
203 virtual int docbook(Buffer const &, std::ostream & os,
204 OutputParams const &) const;
215 /// what appears in the minibuffer when opening
216 virtual std::string const editMessage() const;
218 virtual EDITABLE editable() const;
219 /// can we go further down on mouse click?
220 virtual bool descendable() const { return false; }
222 virtual bool isTextInset() const { return false; }
223 /// return true if the inset should be removed automatically
224 virtual bool autoDelete() const;
226 /** This is not quite the correct place for this enum. I think
227 the correct would be to let each subclass of Inset declare
228 its own enum code. Actually the notion of an InsetBase::Code
229 should be avoided, but I am not sure how this could be done
235 TOC_CODE, // do these insets really need a code? (ale)
295 MATHMACRO_CODE, // 30
326 /** returns the Code corresponding to the \c name.
327 * Eg, translate("branch") == BRANCH_CODE
329 static Code translate(std::string const & name);
331 /// returns true if the inset can hold an inset of given type
332 virtual bool insetAllowed(Code) const { return false; }
333 /// if this inset has paragraphs should they be output all as default
334 /// paragraphs with "Standard" layout?
335 virtual bool forceDefaultParagraphs(InsetBase const *) const { return false; }
338 virtual std::string const & getInsetName() const;
339 /// used to toggle insets
340 /// is the inset open?
341 virtual bool isOpen() const { return false; }
342 /// should this inset be handled like a normal charater
343 virtual bool isChar() const { return false; }
344 /// is this equivalent to a letter?
345 virtual bool isLetter() const { return false; }
346 /// is this equivalent to a space (which is BTW different from
347 /// a line separator)?
348 virtual bool isSpace() const { return false; }
349 /// should we have a non-filled line before this inset?
350 virtual bool display() const { return false; }
351 /// should we break lines after this inset?
352 virtual bool isLineSeparator() const { return false; }
353 /// dumps content to lyxerr
354 virtual void dump() const;
355 /// write inset in .lyx format
356 virtual void write(Buffer const &, std::ostream &) const {}
357 /// read inset in .lyx format
358 virtual void read(Buffer const &, LyXLex &) {}
359 /// returns the number of rows (\n's) of generated tex code.
360 virtual int latex(Buffer const &, std::ostream &,
361 OutputParams const &) const { return 0; }
362 /// returns true to override begin and end inset in file
363 virtual bool directWrite() const;
365 virtual bool allowSpellCheck() const { return false; }
367 /// if this insets owns text cells (e.g. InsetText) return cell num
368 virtual LyXText * getText(int /*num*/) const { return 0; }
370 /** Adds a LaTeX snippet to the Preview Loader for transformation
371 * into a bitmap image. Does not start the laoding process.
373 * Most insets have no interest in this capability, so the method
376 virtual void addPreview(lyx::graphics::PreviewLoader &) const {}
378 /// returns LyX code associated with the inset. Used for TOC, ...)
379 virtual Code lyxCode() const { return NO_CODE; }
381 /// -1: text mode, 1: math mode, 0 undecided
382 enum mode_type {UNDECIDED_MODE, TEXT_MODE, MATH_MODE};
383 /// return text or mathmode if that is possible to determine
384 virtual mode_type currentMode() const { return UNDECIDED_MODE; }
385 /// returns whether this inset is allowed in other insets of given mode
386 virtual bool allowedIn(mode_type) const { return true; }
388 /// is this inset allowed within a font change?
389 virtual bool noFontChange() const { return false; }
392 virtual void markErased();
394 virtual int width() const { return 10; }
396 virtual int ascent() const { return 10; }
398 virtual int descent() const { return 10; }
400 enum CollapseStatus {
406 virtual void setStatus(LCursor &, CollapseStatus) {}
409 InsetBase(InsetBase const &);
410 /** The real dispatcher.
411 * Gets normally called from LCursor::dispatch(). LCursor::dispatch()
412 * assumes the common case of 'LFUN handled, need update'.
413 * This has to be overriden by calling LCursor::undispatched() or
414 * LCursor::noUpdate() if appropriate.
415 * If you need to call the dispatch method of some inset directly
416 * you may have to explicitly request an update at that place. Don't
417 * do it in doDispatch(), since that causes nested updates when
418 * called from LCursor::dispatch(), and these can lead to crashes.
421 virtual void doDispatch(LCursor & cur, FuncRequest & cmd);
423 virtual std::auto_ptr<InsetBase> doClone() const = 0;
428 * returns true if pointer argument is valid
429 * and points to an editable inset
431 bool isEditableInset(InsetBase const * inset);
435 * returns true if pointer argument is valid
436 * and points to a highly editable inset
438 bool isHighlyEditableInset(InsetBase const * inset);