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.
16 #include "dimension.h"
18 #include "support/docstream.h"
44 namespace graphics { class PreviewLoader; }
47 /// Common base class to all insets
49 // Do not add _any_ (non-static) data members as this would inflate
50 // everything storing large quantities of insets. Mathed e.g. would
56 typedef ptrdiff_t difference_type;
57 /// short of anything else reasonable
58 typedef size_t size_type;
59 /// type for cell indices
60 typedef size_t idx_type;
61 /// type for cursor positions
62 typedef ptrdiff_t pos_type;
63 /// type for row numbers
64 typedef size_t row_type;
65 /// type for column numbers
66 typedef size_t col_type;
68 /// virtual base class destructor
69 virtual ~InsetBase() {}
70 /// replicate ourselves
71 std::auto_ptr<InsetBase> clone() const;
73 /// identification as math inset
74 virtual InsetMath * asInsetMath() { return 0; }
75 /// true for 'math' math inset, but not for e.g. mbox
76 virtual bool inMathed() const { return false; }
78 /// the real dispatcher
79 void dispatch(LCursor & cur, FuncRequest & cmd);
81 * \returns true if this function made a definitive decision on
82 * whether the inset wants to handle the request \p cmd or not.
83 * The result of this decision is put into \p status.
85 * Every request that is enabled in this method needs to be handled
86 * in doDispatch(). Normally we have a 1:1 relationship between the
87 * requests handled in getStatus() and doDispatch(), but there are
89 * - A request that is disabled in getStatus() does not need to
90 * appear in doDispatch(). It is guaranteed that doDispatch()
91 * is never called with this request.
92 * - A few requests are en- or disabled in InsetBase::getStatus().
93 * These need to be handled in the doDispatch() methods of the
94 * derived insets, since InsetBase::doDispatch() has not enough
95 * information to handle them.
96 * - LFUN_MOUSE_* need not to be handled in getStatus(), because these
97 * are dispatched directly
99 virtual bool getStatus(LCursor & cur, FuncRequest const & cmd,
100 FuncStatus & status) const;
103 virtual void edit(LCursor & cur, bool left);
105 virtual InsetBase * editXY(LCursor & cur, int x, int y);
107 /// compute the size of the object returned in dim
108 /// \retval true if metrics changed.
109 virtual bool metrics(MetricsInfo & mi, Dimension & dim) const = 0;
110 /// draw inset and update (xo, yo)-cache
111 virtual void draw(PainterInfo & pi, int x, int y) const = 0;
112 /// draw inset selection if necessary
113 virtual void drawSelection(PainterInfo &, int, int) const {}
115 virtual bool editing(BufferView * bv) const;
117 virtual bool showInsetDialog(BufferView *) const { return false; }
119 /// draw inset decoration if necessary.
120 /// This can use \c drawMarkers() for example.
121 virtual void drawDecoration(PainterInfo &, int, int) const {}
122 /// draw four angular markers
123 void drawMarkers(PainterInfo & pi, int x, int y) const;
124 /// draw two angular markers
125 void drawMarkers2(PainterInfo & pi, int x, int y) const;
126 /// add space for markers
127 void metricsMarkers(Dimension & dim, int framesize = 1) const;
128 /// add space for markers
129 void metricsMarkers2(Dimension & dim, int framesize = 1) const;
130 /// last drawn position for 'important' insets
131 int xo(BufferView const & bv) const;
132 /// last drawn position for 'important' insets
133 int yo(BufferView const & bv) const;
134 /// set x/y drawing position cache if available
135 virtual void setPosCache(PainterInfo const &, int, int) const {}
136 /// do we cover screen position x/y?
137 virtual bool covers(BufferView const & bv, int x, int y) const;
138 /// get the screen positions of the cursor (see note in cursor.C)
139 virtual void cursorPos(BufferView const & bv,
140 CursorSlice const & sl, bool boundary, int & x, int & y) const;
142 /// is this an inset that can be moved into?
143 virtual bool isActive() const { return nargs() > 0; }
144 /// Where should we go when we press the up or down cursor key?
145 virtual bool idxUpDown(LCursor & cur, bool up) const;
146 /// Move one cell to the left
147 virtual bool idxLeft(LCursor &) const { return false; }
148 /// Move one cell to the right
149 virtual bool idxRight(LCursor &) const { return false; }
151 /// Move one physical cell up
152 virtual bool idxNext(LCursor &) const { return false; }
153 /// Move one physical cell down
154 virtual bool idxPrev(LCursor &) const { return false; }
156 /// Target pos when we enter the inset from the left by pressing "Right"
157 virtual bool idxFirst(LCursor &) const { return false; }
158 /// Target pos when we enter the inset from the right by pressing "Left"
159 virtual bool idxLast(LCursor &) const { return false; }
161 /// Delete a cell and move cursor
162 virtual bool idxDelete(idx_type &) { return false; }
163 /// pulls cell after pressing erase
164 virtual void idxGlue(idx_type) {}
165 /// returns list of cell indices that are "between" from and to for
166 /// selection purposes
167 virtual bool idxBetween(idx_type idx, idx_type from, idx_type to) const;
169 /// to which column belongs a cell with a given index?
170 virtual col_type col(idx_type) const { return 0; }
171 /// to which row belongs a cell with a given index?
172 virtual row_type row(idx_type) const { return 0; }
173 /// cell idex corresponding to row and column;
174 virtual idx_type index(row_type row, col_type col) const;
175 /// any additional x-offset when drawing a cell?
176 virtual int cellXOffset(idx_type) const { return 0; }
177 /// any additional y-offset when drawing a cell?
178 virtual int cellYOffset(idx_type) const { return 0; }
179 /// number of embedded cells
180 virtual size_t nargs() const { return 0; }
181 /// number of rows in gridlike structures
182 virtual size_t nrows() const { return 0; }
183 /// number of columns in gridlike structures
184 virtual size_t ncols() const { return 0; }
185 /// is called when the cursor leaves this inset
186 // returns true if cursor is now invalid.
187 virtual bool notifyCursorLeaves(LCursor &) { return false; }
188 /// is called when the mouse enter or leave this inset
189 /// return true if this inset needs repaint
190 virtual bool setMouseHover(bool) { return false; }
192 /// request "external features"
193 virtual void validate(LaTeXFeatures &) const {}
194 /// Appends \c list with all labels found within this inset.
195 virtual void getLabelList(Buffer const &,
196 std::vector<docstring> & /* list */) const {}
198 /// describe content if cursor inside
199 virtual void infoize(odocstream &) const {}
200 /// describe content if cursor behind
201 virtual void infoize2(odocstream &) const {}
204 PLAINTEXT_NEWLINE = 10000
207 /// plain text output in ucs4 encoding
208 /// return the number of characters; in case of multiple lines of
209 /// output, add PLAINTEXT_NEWLINE to the number of chars in the last line
210 virtual int plaintext(Buffer const &, odocstream &,
211 OutputParams const &) const = 0;
213 virtual int docbook(Buffer const &, odocstream & os,
214 OutputParams const &) const;
215 /// the string that is passed to the TOC
216 virtual void textString(Buffer const &, odocstream &) const {}
218 /** This enum indicates by which means the inset can be modified:
219 - NOT_EDITABLE: the inset's content cannot be modified at all
220 (e.g. printindex, insetspecialchar)
221 - IS_EDITABLE: content can be edited via dialog (e.g. bibtex, index, url)
222 - HIGHLY_EDITABLE: content can be edited on screen (normally means that
223 insettext is contained, e.g. collapsables, tabular) */
224 // FIXME: This has not yet been fully implemented to math insets
233 /// what appears in the minibuffer when opening
234 virtual docstring const editMessage() const;
236 virtual EDITABLE editable() const;
237 /// can we go further down on mouse click?
238 virtual bool descendable() const { return false; }
239 /// does this contain text that can be change track marked in DVI?
240 virtual bool canTrackChanges() const { return false; }
241 /// is this inset based on the TextInset class?
242 virtual InsetText const * asTextInset() const { return 0; }
243 /// return true if the inset should be removed automatically
244 virtual bool autoDelete() const;
246 /** This is not quite the correct place for this enum. I think
247 the correct would be to let each subclass of Inset declare
248 its own enum code. Actually the notion of an InsetBase::Code
249 should be avoided, but I am not sure how this could be done
255 TOC_CODE, // do these insets really need a code? (ale)
315 MATHMACRO_CODE, // 30
350 /** returns the Code corresponding to the \c name.
351 * Eg, translate("branch") == BRANCH_CODE
353 static Code translate(std::string const & name);
355 /// returns true if the inset can hold an inset of given type
356 virtual bool insetAllowed(Code) const { return false; }
357 /// if this inset has paragraphs should they be output all as default
358 /// paragraphs with the default layout of the text class?
359 virtual bool forceDefaultParagraphs(idx_type) const { return false; }
362 virtual docstring const & getInsetName() const;
363 /// used to toggle insets
364 /// is the inset open?
365 /// should this inset be handled like a normal charater
366 virtual bool isChar() const { return false; }
367 /// is this equivalent to a letter?
368 virtual bool isLetter() const { return false; }
369 /// is this equivalent to a space (which is BTW different from
370 /// a line separator)?
371 virtual bool isSpace() const { return false; }
372 /// should we have a non-filled line before this inset?
373 virtual bool display() const { return false; }
374 /// should we break lines after this inset?
375 virtual bool isLineSeparator() const { return false; }
376 /// should paragraph indendation be ommitted in any case?
377 virtual bool neverIndent(Buffer const &) const { return false; }
378 /// dumps content to lyxerr
379 virtual void dump() const;
380 /// write inset in .lyx format
381 virtual void write(Buffer const &, std::ostream &) const {}
382 /// read inset in .lyx format
383 virtual void read(Buffer const &, LyXLex &) {}
384 /** Export the inset to LaTeX.
385 * Don't use a temporary stringstream if the final output is
386 * supposed to go to a file.
387 * \sa Buffer::writeLaTeXSource for the reason.
388 * \return the number of rows (\n's) of generated LaTeX code.
390 virtual int latex(Buffer const &, odocstream &,
391 OutputParams const &) const { return 0; }
392 /// returns true to override begin and end inset in file
393 virtual bool directWrite() const;
395 virtual bool allowSpellCheck() const { return false; }
397 /// if this insets owns text cells (e.g. InsetText) return cell num
398 virtual LyXText * getText(int /*num*/) const { return 0; }
400 /** Adds a LaTeX snippet to the Preview Loader for transformation
401 * into a bitmap image. Does not start the laoding process.
403 * Most insets have no interest in this capability, so the method
406 virtual void addPreview(graphics::PreviewLoader &) const {}
407 /// Add an entry to the TocList
408 virtual void addToToc(TocList &, Buffer const &) const {}
411 /// returns LyX code associated with the inset. Used for TOC, ...)
412 virtual Code lyxCode() const { return NO_CODE; }
414 /// -1: text mode, 1: math mode, 0 undecided
415 enum mode_type {UNDECIDED_MODE, TEXT_MODE, MATH_MODE};
416 /// return text or mathmode if that is possible to determine
417 virtual mode_type currentMode() const { return UNDECIDED_MODE; }
418 /// returns whether this inset is allowed in other insets of given mode
419 virtual bool allowedIn(mode_type) const { return true; }
421 * Is this inset allowed within a font change?
423 * FIXME: noFontChange means currently that the font change is closed
424 * in LaTeX before the inset, and that the contents of the inset
425 * will be in default font. This should be changed so that the inset
426 * changes the font again.
428 virtual bool noFontChange() const { return false; }
430 /// set the change for the entire inset
431 virtual void setChange(Change const &) {}
432 /// accept the changes within the inset
433 virtual void acceptChanges(BufferParams const &) {};
434 /// reject the changes within the inset
435 virtual void rejectChanges(BufferParams const &) {};
438 virtual int width() const { return 10; }
440 virtual int ascent() const { return 10; }
442 virtual int descent() const { return 10; }
444 int scroll() const { return 0; }
446 enum CollapseStatus {
452 virtual void setStatus(LCursor &, CollapseStatus) {}
455 InsetBase(InsetBase const &) {}
456 /** The real dispatcher.
457 * Gets normally called from LCursor::dispatch(). LCursor::dispatch()
458 * assumes the common case of 'LFUN handled, need update'.
459 * This has to be overriden by calling LCursor::undispatched() or
460 * LCursor::noUpdate() if appropriate.
461 * If you need to call the dispatch method of some inset directly
462 * you may have to explicitly request an update at that place. Don't
463 * do it in doDispatch(), since that causes nested updates when
464 * called from LCursor::dispatch(), and these can lead to crashes.
467 virtual void doDispatch(LCursor & cur, FuncRequest & cmd);
469 /// Cached dimensions of the inset.
470 mutable Dimension dim_;
472 virtual std::auto_ptr<InsetBase> doClone() const = 0;
477 * returns true if pointer argument is valid
478 * and points to an editable inset
480 bool isEditableInset(InsetBase const * inset);
484 * returns true if pointer argument is valid
485 * and points to a highly editable inset
487 bool isHighlyEditableInset(InsetBase const * inset);