4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
7 * \author Alejandro Aguilar Sierra
9 * \author Lars Gullik Bjønnes
10 * \author Matthias Ettrich
12 * Full author contact details are available in file CREDITS.
19 #include "Dimension.h"
21 #include "support/docstream.h"
31 class ParConstIterator;
49 namespace graphics { class PreviewLoader; }
52 /// Common base class to all insets
54 // Do not add _any_ (non-static) data members as this would inflate
55 // everything storing large quantities of insets. Mathed e.g. would
61 typedef ptrdiff_t difference_type;
62 /// short of anything else reasonable
63 typedef size_t size_type;
64 /// type for cell indices
65 typedef size_t idx_type;
66 /// type for cursor positions
67 typedef ptrdiff_t pos_type;
68 /// type for row numbers
69 typedef size_t row_type;
70 /// type for column numbers
71 typedef size_t col_type;
73 /// virtual base class destructor
75 /// replicate ourselves
76 std::auto_ptr<Inset> clone() const;
78 /// identification as math inset
79 virtual InsetMath * asInsetMath() { return 0; }
80 /// true for 'math' math inset, but not for e.g. mbox
81 virtual bool inMathed() const { return false; }
82 /// is this inset based on the TextInset class?
83 virtual InsetText * asTextInset() { return 0; }
84 /// is this inset based on the TextInset class?
85 virtual InsetText const * asTextInset() const { return 0; }
87 /// the real dispatcher
88 void dispatch(Cursor & cur, FuncRequest & cmd);
90 * \returns true if this function made a definitive decision on
91 * whether the inset wants to handle the request \p cmd or not.
92 * The result of this decision is put into \p status.
94 * Every request that is enabled in this method needs to be handled
95 * in doDispatch(). Normally we have a 1:1 relationship between the
96 * requests handled in getStatus() and doDispatch(), but there are
98 * - A request that is disabled in getStatus() does not need to
99 * appear in doDispatch(). It is guaranteed that doDispatch()
100 * is never called with this request.
101 * - A few requests are en- or disabled in Inset::getStatus().
102 * These need to be handled in the doDispatch() methods of the
103 * derived insets, since Inset::doDispatch() has not enough
104 * information to handle them.
105 * - LFUN_MOUSE_* need not to be handled in getStatus(), because these
106 * are dispatched directly
108 virtual bool getStatus(Cursor & cur, FuncRequest const & cmd,
109 FuncStatus & status) const;
112 virtual void edit(Cursor & cur, bool left);
114 virtual Inset * editXY(Cursor & cur, int x, int y);
116 /// compute the size of the object returned in dim
117 /// \retval true if metrics changed.
118 virtual bool metrics(MetricsInfo & mi, Dimension & dim) const = 0;
119 /// draw inset and update (xo, yo)-cache
120 virtual void draw(PainterInfo & pi, int x, int y) const = 0;
121 /// draw inset selection if necessary
122 virtual void drawSelection(PainterInfo &, int, int) const {}
124 virtual bool editing(BufferView * bv) const;
126 virtual bool showInsetDialog(BufferView *) const { return false; }
128 /// draw inset decoration if necessary.
129 /// This can use \c drawMarkers() for example.
130 virtual void drawDecoration(PainterInfo &, int, int) const {}
131 /// draw four angular markers
132 void drawMarkers(PainterInfo & pi, int x, int y) const;
133 /// draw two angular markers
134 void drawMarkers2(PainterInfo & pi, int x, int y) const;
135 /// add space for markers
136 void metricsMarkers(Dimension & dim, int framesize = 1) const;
137 /// add space for markers
138 void metricsMarkers2(Dimension & dim, int framesize = 1) const;
139 /// last drawn position for 'important' insets
140 int xo(BufferView const & bv) const;
141 /// last drawn position for 'important' insets
142 int yo(BufferView const & bv) const;
143 /// set x/y drawing position cache if available
144 virtual void setPosCache(PainterInfo const &, int, int) const;
145 /// do we cover screen position x/y?
146 virtual bool covers(BufferView const & bv, int x, int y) const;
147 /// get the screen positions of the cursor (see note in Cursor.cpp)
148 virtual void cursorPos(BufferView const & bv,
149 CursorSlice const & sl, bool boundary, int & x, int & y) const;
151 /// is this an inset that can be moved into?
152 /// FIXME: merge with editable()
153 virtual bool isActive() const { return nargs() > 0; }
154 /// Where should we go when we press the up or down cursor key?
155 virtual bool idxUpDown(Cursor & cur, bool up) const;
156 /// Move one cell to the left
157 virtual bool idxLeft(Cursor &) const { return false; }
158 /// Move one cell to the right
159 virtual bool idxRight(Cursor &) const { return false; }
161 /// Move one physical cell up
162 virtual bool idxNext(Cursor &) const { return false; }
163 /// Move one physical cell down
164 virtual bool idxPrev(Cursor &) const { return false; }
166 /// Target pos when we enter the inset from the left by pressing "Right"
167 virtual bool idxFirst(Cursor &) const { return false; }
168 /// Target pos when we enter the inset from the right by pressing "Left"
169 virtual bool idxLast(Cursor &) const { return false; }
171 /// Delete a cell and move cursor
172 virtual bool idxDelete(idx_type &) { return false; }
173 /// pulls cell after pressing erase
174 virtual void idxGlue(idx_type) {}
175 /// returns list of cell indices that are "between" from and to for
176 /// selection purposes
177 virtual bool idxBetween(idx_type idx, idx_type from, idx_type to) const;
179 /// to which column belongs a cell with a given index?
180 virtual col_type col(idx_type) const { return 0; }
181 /// to which row belongs a cell with a given index?
182 virtual row_type row(idx_type) const { return 0; }
183 /// cell idex corresponding to row and column;
184 virtual idx_type index(row_type row, col_type col) const;
185 /// any additional x-offset when drawing a cell?
186 virtual int cellXOffset(idx_type) const { return 0; }
187 /// any additional y-offset when drawing a cell?
188 virtual int cellYOffset(idx_type) const { return 0; }
189 /// number of embedded cells
190 virtual size_t nargs() const { return 0; }
191 /// number of rows in gridlike structures
192 virtual size_t nrows() const { return 0; }
193 /// number of columns in gridlike structures
194 virtual size_t ncols() const { return 0; }
195 /// is called when the cursor leaves this inset
196 // returns true if cursor is now invalid.
197 virtual bool notifyCursorLeaves(Cursor &) { return false; }
198 /// is called when the mouse enter or leave this inset
199 /// return true if this inset needs repaint
200 virtual bool setMouseHover(bool) { return false; }
201 /// return true if this inset is hovered (under mouse)
202 /// This is by now only used by mathed to draw corners
203 /// (Inset::drawMarkers() and Inset::drawMarkers2()).
204 /// Other insets do not have to redefine this function to
205 /// return the correct status of mouseHovered.
206 virtual bool mouseHovered() const { return false; }
208 /// request "external features"
209 virtual void validate(LaTeXFeatures &) const {}
210 /// Appends \c list with all labels found within this inset.
211 virtual void getLabelList(Buffer const &,
212 std::vector<docstring> & /* list */) const {}
214 /// describe content if cursor inside
215 virtual void infoize(odocstream &) const {}
216 /// describe content if cursor behind
217 virtual void infoize2(odocstream &) const {}
220 PLAINTEXT_NEWLINE = 10000
223 /// plain text output in ucs4 encoding
224 /// return the number of characters; in case of multiple lines of
225 /// output, add PLAINTEXT_NEWLINE to the number of chars in the last line
226 virtual int plaintext(Buffer const &, odocstream &,
227 OutputParams const &) const = 0;
229 virtual int docbook(Buffer const &, odocstream & os,
230 OutputParams const &) const;
231 /// the string that is passed to the TOC
232 virtual void textString(Buffer const &, odocstream &) const {}
234 /** This enum indicates by which means the inset can be modified:
235 - NOT_EDITABLE: the inset's content cannot be modified at all
236 (e.g. printindex, insetspecialchar)
237 - IS_EDITABLE: content can be edited via dialog (e.g. bibtex, index, url)
238 - HIGHLY_EDITABLE: content can be edited on screen (normally means that
239 insettext is contained, e.g. collapsables, tabular) */
240 // FIXME: This has not yet been fully implemented to math insets
249 /// what appears in the minibuffer when opening
250 virtual docstring const editMessage() const;
252 virtual EDITABLE editable() const;
253 /// can we go further down on mouse click?
254 virtual bool descendable() const { return false; }
255 /// does this contain text that can be change track marked in DVI?
256 virtual bool canTrackChanges() const { return false; }
257 /// return true if the inset should be removed automatically
258 virtual bool autoDelete() const;
260 /** This is not quite the correct place for this enum. I think
261 the correct would be to let each subclass of Inset declare
262 its own enum code. Actually the notion of an Inset::Code
263 should be avoided, but I am not sure how this could be done
269 TOC_CODE, // do these insets really need a code? (ale)
329 MATHMACRO_CODE, // 30
366 /** returns the Code corresponding to the \c name.
367 * Eg, translate("branch") == BRANCH_CODE
369 static Code translate(std::string const & name);
371 /// returns true if the inset can hold an inset of given type
372 virtual bool insetAllowed(Code) const { return false; }
373 /// if this inset has paragraphs should they be output all as default
374 /// paragraphs with the default layout of the text class?
375 virtual bool forceDefaultParagraphs(idx_type) const { return false; }
376 /// Is the width forced to some value?
377 virtual bool hasFixedWidth() const { return false; }
380 virtual docstring name() const { return from_ascii("unknown"); }
381 /// used to toggle insets
382 /// is the inset open?
383 /// should this inset be handled like a normal charater
384 virtual bool isChar() const { return false; }
385 /// is this equivalent to a letter?
386 virtual bool isLetter() const { return false; }
387 /// is this equivalent to a space (which is BTW different from
388 /// a line separator)?
389 virtual bool isSpace() const { return false; }
398 /// should we have a non-filled line before this inset?
399 virtual DisplayType display() const { return Inline; }
400 /// should we break lines after this inset?
401 virtual bool isLineSeparator() const { return false; }
402 /// should paragraph indendation be ommitted in any case?
403 virtual bool neverIndent(Buffer const &) const { return false; }
404 /// dumps content to lyxerr
405 virtual void dump() const;
406 /// write inset in .lyx format
407 virtual void write(Buffer const &, std::ostream &) const {}
408 /// read inset in .lyx format
409 virtual void read(Buffer const &, Lexer &) {}
410 /** Export the inset to LaTeX.
411 * Don't use a temporary stringstream if the final output is
412 * supposed to go to a file.
413 * \sa Buffer::writeLaTeXSource for the reason.
414 * \return the number of rows (\n's) of generated LaTeX code.
416 virtual int latex(Buffer const &, odocstream &,
417 OutputParams const &) const { return 0; }
418 /// returns true to override begin and end inset in file
419 virtual bool directWrite() const;
421 virtual bool allowSpellCheck() const { return false; }
423 /// if this insets owns text cells (e.g. InsetText) return cell num
424 virtual Text * getText(int /*num*/) const { return 0; }
426 /** Adds a LaTeX snippet to the Preview Loader for transformation
427 * into a bitmap image. Does not start the laoding process.
429 * Most insets have no interest in this capability, so the method
432 virtual void addPreview(graphics::PreviewLoader &) const {}
433 /// Add an entry to the TocList
434 /// pit is the ParConstIterator of the paragraph containing the inset
435 virtual void addToToc(TocList &, Buffer const &, ParConstIterator &) const {}
438 /// returns LyX code associated with the inset. Used for TOC, ...)
439 virtual Code lyxCode() const { return NO_CODE; }
441 /// -1: text mode, 1: math mode, 0 undecided
442 enum mode_type {UNDECIDED_MODE, TEXT_MODE, MATH_MODE};
443 /// return text or mathmode if that is possible to determine
444 virtual mode_type currentMode() const { return UNDECIDED_MODE; }
445 /// returns whether this inset is allowed in other insets of given mode
446 virtual bool allowedIn(mode_type) const { return true; }
448 * Is this inset allowed within a font change?
450 * FIXME: noFontChange means currently that the font change is closed
451 * in LaTeX before the inset, and that the contents of the inset
452 * will be in default font. This should be changed so that the inset
453 * changes the font again.
455 virtual bool noFontChange() const { return false; }
457 /// set the change for the entire inset
458 virtual void setChange(Change const &) {}
459 /// accept the changes within the inset
460 virtual void acceptChanges(BufferParams const &) {};
461 /// reject the changes within the inset
462 virtual void rejectChanges(BufferParams const &) {};
465 int width() const { return dim_.wid; }
467 int ascent() const { return dim_.asc; }
469 int descent() const { return dim_.des; }
471 int scroll() const { return 0; }
473 void setBackgroundColor(Color_color);
475 Color_color backgroundColor() const;
477 enum CollapseStatus {
483 virtual void setStatus(Cursor &, CollapseStatus) {}
485 enum { TEXT_TO_INSET_OFFSET = 4 };
490 /** The real dispatcher.
491 * Gets normally called from Cursor::dispatch(). Cursor::dispatch()
492 * assumes the common case of 'LFUN handled, need update'.
493 * This has to be overriden by calling Cursor::undispatched() or
494 * Cursor::noUpdate() if appropriate.
495 * If you need to call the dispatch method of some inset directly
496 * you may have to explicitly request an update at that place. Don't
497 * do it in doDispatch(), since that causes nested updates when
498 * called from Cursor::dispatch(), and these can lead to crashes.
501 virtual void doDispatch(Cursor & cur, FuncRequest & cmd);
503 /// Cached dimensions of the inset.
504 mutable Dimension dim_;
506 virtual std::auto_ptr<Inset> doClone() const = 0;
507 /** We store the Color::color value as an int to get Color.h out
508 * of the header file.
510 int background_color_;
515 * returns true if pointer argument is valid
516 * and points to an editable inset
518 bool isEditableInset(Inset const * inset);
522 * returns true if pointer argument is valid
523 * and points to a highly editable inset
525 bool isHighlyEditableInset(Inset const * inset);
527 /** \c Inset_code is a wrapper for Inset::Code.
528 * It can be forward-declared and passed as a function argument without
529 * having to expose Inset.h.
535 Inset_code(Inset::Code val) : val_(val) {}
536 operator Inset::Code() const { return val_; }