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