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.
18 #include "ColorCode.h"
19 #include "InsetCode.h"
20 #include "LayoutEnums.h"
21 #include "OutputEnums.h"
23 #include "support/strfwd.h"
24 #include "support/types.h"
40 class InsetCollapsable;
54 class ParConstIterator;
60 namespace graphics { class PreviewLoader; }
63 /// returns the InsetCode corresponding to the \c name.
64 /// Eg, insetCode("branch") == BRANCH_CODE
65 InsetCode insetCode(std::string const & name);
66 /// returns the Inset name corresponding to the \c InsetCode.
67 /// Eg, insetName(BRANCH_CODE) == "branch"
68 std::string insetName(InsetCode);
69 /// returns the Inset name corresponding to the \c InsetCode.
70 /// Eg, insetDisplayName(BRANCH_CODE) == _("Branch")
71 docstring insetDisplayName(InsetCode);
73 /// Common base class to all insets
75 // Do not add _any_ (non-static) data members as this would inflate
76 // everything storing large quantities of insets. Mathed e.g. would
83 ENTRY_DIRECTION_IGNORE,
84 ENTRY_DIRECTION_RIGHT,
88 typedef ptrdiff_t difference_type;
89 /// short of anything else reasonable
90 typedef size_t size_type;
91 /// type for cell indices
92 typedef size_t idx_type;
93 /// type for cursor positions
94 typedef ptrdiff_t pos_type;
95 /// type for row numbers
96 typedef size_t row_type;
97 /// type for column numbers
98 typedef size_t col_type;
100 /// virtual base class destructor
103 /// change associated Buffer
104 virtual void setBuffer(Buffer & buffer);
105 /// remove the buffer reference
106 void resetBuffer() { setBuffer( *static_cast<Buffer *>(0)); }
107 /// retrieve associated Buffer
108 virtual Buffer & buffer();
109 virtual Buffer const & buffer() const;
110 /// Returns true if buffer_ actually points to a Buffer that has
111 /// been loaded into LyX and is still open. Note that this will
112 /// always return false for cloned Buffers. If you want to allow
113 /// for the case of cloned Buffers, use isBufferValid().
114 bool isBufferLoaded() const;
115 /// Returns true if this is a loaded buffer or a cloned buffer.
116 bool isBufferValid() const;
118 /// initialize view for this inset.
120 * This is typically used after this inset is created interactively.
121 * Intented purpose is to sanitize internal state with regard to current
124 virtual void initView() {};
125 /// \return true if this inset is labeled.
126 virtual bool isLabeled() const { return false; }
128 /// identification as math inset
129 virtual InsetMath * asInsetMath() { return 0; }
130 /// identification as math inset
131 virtual InsetMath const * asInsetMath() const { return 0; }
132 /// true for 'math' math inset, but not for e.g. mbox
133 virtual bool inMathed() const { return false; }
134 /// is this inset based on the InsetText class?
135 virtual InsetText * asInsetText() { return 0; }
136 /// is this inset based on the InsetText class?
137 virtual InsetText const * asInsetText() const { return 0; }
138 /// is this inset based on the InsetCollapsable class?
139 virtual InsetCollapsable * asInsetCollapsable() { return 0; }
140 /// is this inset based on the InsetCollapsable class?
141 virtual InsetCollapsable const * asInsetCollapsable() const { return 0; }
142 /// is this inset based on the InsetTabular class?
143 virtual InsetTabular * asInsetTabular() { return 0; }
144 /// is this inset based on the InsetTabular class?
145 virtual InsetTabular const * asInsetTabular() const { return 0; }
146 /// is this inset based on the InsetCommand class?
147 virtual InsetCommand * asInsetCommand() { return 0; }
148 /// is this inset based on the InsetCommand class?
149 virtual InsetCommand const * asInsetCommand() const { return 0; }
151 /// the real dispatcher
152 void dispatch(Cursor & cur, FuncRequest & cmd);
154 * \returns true if this function made a definitive decision on
155 * whether the inset wants to handle the request \p cmd or not.
156 * The result of this decision is put into \p status.
158 * Every request that is enabled in this method needs to be handled
159 * in doDispatch(). Normally we have a 1:1 relationship between the
160 * requests handled in getStatus() and doDispatch(), but there are
162 * - A request that is disabled in getStatus() does not need to
163 * appear in doDispatch(). It is guaranteed that doDispatch()
164 * is never called with this request.
165 * - A few requests are en- or disabled in Inset::getStatus().
166 * These need to be handled in the doDispatch() methods of the
167 * derived insets, since Inset::doDispatch() has not enough
168 * information to handle them.
169 * - LFUN_MOUSE_* need not to be handled in getStatus(), because these
170 * are dispatched directly
172 virtual bool getStatus(Cursor & cur, FuncRequest const & cmd,
173 FuncStatus & status) const;
176 virtual void edit(Cursor & cur, bool front,
177 EntryDirection entry_from = ENTRY_DIRECTION_IGNORE);
179 virtual Inset * editXY(Cursor & cur, int x, int y);
181 /// compute the size of the object returned in dim
182 virtual void metrics(MetricsInfo & mi, Dimension & dim) const = 0;
183 /// draw inset and update (xo, yo)-cache
184 virtual void draw(PainterInfo & pi, int x, int y) const = 0;
185 /// draw inset selection if necessary
186 virtual void drawSelection(PainterInfo &, int, int) const {}
187 /// draw inset background if the inset has an own background and a
188 /// selection is drawn by drawSelection.
189 virtual void drawBackground(PainterInfo &, int, int) const {}
191 virtual bool editing(BufferView const * bv) const;
193 virtual bool showInsetDialog(BufferView *) const;
195 /// draw inset decoration if necessary.
196 /// This can use \c drawMarkers() for example.
197 virtual void drawDecoration(PainterInfo &, int, int) const {}
198 /// draw four angular markers
199 void drawMarkers(PainterInfo & pi, int x, int y) const;
200 /// draw two angular markers
201 void drawMarkers2(PainterInfo & pi, int x, int y) const;
202 /// add space for markers
203 void metricsMarkers(Dimension & dim, int framesize = 1) const;
204 /// add space for markers
205 void metricsMarkers2(Dimension & dim, int framesize = 1) const;
206 /// last drawn position for 'important' insets
207 int xo(BufferView const & bv) const;
208 /// last drawn position for 'important' insets
209 int yo(BufferView const & bv) const;
210 /// set x/y drawing position cache if available
211 virtual void setPosCache(PainterInfo const &, int, int) const;
213 void setDimCache(MetricsInfo const &, Dimension const &) const;
214 /// do we cover screen position x/y?
215 virtual bool covers(BufferView const & bv, int x, int y) const;
216 /// get the screen positions of the cursor (see note in Cursor.cpp)
217 virtual void cursorPos(BufferView const & bv,
218 CursorSlice const & sl, bool boundary, int & x, int & y) const;
220 /// Allow multiple blanks
221 virtual bool isFreeSpacing() const;
222 /// Don't eliminate empty paragraphs
223 virtual bool allowEmpty() const;
224 /// Force inset into LTR environment if surroundings are RTL
225 virtual bool forceLTR() const;
226 /// whether to include this inset in the strings generated for the TOC
227 virtual bool isInToc() const;
229 /// Where should we go when we press the up or down cursor key?
230 virtual bool idxUpDown(Cursor & cur, bool up) const;
231 /// Move one cell backwards
232 virtual bool idxBackward(Cursor &) const { return false; }
233 /// Move one cell forward
234 virtual bool idxForward(Cursor &) const { return false; }
236 /// Move to the next cell
237 virtual bool idxNext(Cursor &) const { return false; }
238 /// Move to the previous cell
239 virtual bool idxPrev(Cursor &) const { return false; }
241 /// Target pos when we enter the inset while moving forward
242 virtual bool idxFirst(Cursor &) const { return false; }
243 /// Target pos when we enter the inset while moving backwards
244 virtual bool idxLast(Cursor &) const { return false; }
246 /// Delete a cell and move cursor
247 virtual bool idxDelete(idx_type &) { return false; }
248 /// pulls cell after pressing erase
249 virtual void idxGlue(idx_type) {}
250 /// returns list of cell indices that are "between" from and to for
251 /// selection purposes
252 virtual bool idxBetween(idx_type idx, idx_type from, idx_type to) const;
254 /// to which column belongs a cell with a given index?
255 virtual col_type col(idx_type) const { return 0; }
256 /// to which row belongs a cell with a given index?
257 virtual row_type row(idx_type) const { return 0; }
258 /// cell index corresponding to row and column;
259 virtual idx_type index(row_type row, col_type col) const;
260 /// any additional x-offset when drawing a cell?
261 virtual int cellXOffset(idx_type) const { return 0; }
262 /// any additional y-offset when drawing a cell?
263 virtual int cellYOffset(idx_type) const { return 0; }
264 /// number of embedded cells
265 virtual size_t nargs() const { return 0; }
266 /// number of rows in gridlike structures
267 virtual size_t nrows() const { return 0; }
268 /// number of columns in gridlike structures
269 virtual size_t ncols() const { return 0; }
270 /// Is called when the cursor leaves this inset.
271 /// Returns true if cursor is now invalid, e.g. if former
272 /// insets in higher cursor slices of \c old do not exist
274 /// \c old is the old cursor, the last slice points to this.
275 /// \c cur is the new cursor. Use the update flags to cause a redraw.
276 virtual bool notifyCursorLeaves(Cursor const & /*old*/, Cursor & /*cur*/)
278 /// Is called when the cursor enters this inset.
279 /// Returns true if cursor is now invalid, e.g. if former
280 /// insets in higher cursor slices of \c old do not exist
282 /// \c cur is the new cursor, some slice points to this. Use the update
283 /// flags to cause a redraw.
284 virtual bool notifyCursorEnters(Cursor & /*cur*/)
286 /// is called when the mouse enters or leaves this inset
287 /// return true if this inset needs a repaint
288 virtual bool setMouseHover(BufferView const *, bool) const
290 /// return true if this inset is hovered (under mouse)
291 /// This is by now only used by mathed to draw corners
292 /// (Inset::drawMarkers() and Inset::drawMarkers2()).
293 /// Other insets do not have to redefine this function to
294 /// return the correct status of mouseHovered.
295 virtual bool mouseHovered(BufferView const *) const { return false; }
297 /// request "external features"
298 virtual void validate(LaTeXFeatures &) const {}
300 /// Validate LFUN_INSET_MODIFY argument.
301 virtual bool validateModifyArgument(docstring const &) const { return true; }
303 /// describe content if cursor inside
304 virtual void infoize(odocstream &) const {}
305 /// describe content if cursor behind
306 virtual void infoize2(odocstream &) const {}
308 enum { PLAINTEXT_NEWLINE = 10000 };
310 /// plain text output in ucs4 encoding
311 /// return the number of characters; in case of multiple lines of
312 /// output, add PLAINTEXT_NEWLINE to the number of chars in the last line
313 virtual int plaintext(odocstream &, OutputParams const &) const = 0;
315 virtual int docbook(odocstream & os, OutputParams const &) const;
317 /// the inset is expected to write XHTML to the XHTMLStream
318 /// \return any "deferred" material that should be written outside the
319 /// normal stream, and which will in fact be written after the current
320 /// paragraph closes. this is appropriate e.g. for floats.
321 virtual docstring xhtml(XHTMLStream & xs, OutputParams const &) const;
323 // FIXME This method is used for things other than generating strings
324 // for the TOC. E.g., it is called by Paragraph::asString() to get the
325 // contents of the inset. These two functions should be disentangled.
326 /// the string that is passed to the TOC
327 virtual void tocString(odocstream &) const {}
329 /// can the contents of the inset be edited on screen ?
330 // true for InsetCollapsables (not ButtonOnly) (not InsetInfo), InsetText
331 virtual bool editable() const;
332 /// has the Inset settings that can be modified in a dialog ?
333 virtual bool hasSettings() const;
334 /// can we go further down on mouse click?
335 // true for InsetCaption, InsetCollapsables (not ButtonOnly), InsetTabular
336 virtual bool descendable(BufferView const &) const { return false; }
337 /// is this an inset that can be moved into?
338 /// FIXME: merge with editable()
339 // true for InsetTabular & InsetText
340 virtual bool isActive() const { return nargs() > 0; }
341 /// can we click at the specified position ?
342 virtual bool clickable(int, int) const { return false; }
344 /// does this contain text that can be change track marked in DVI?
345 virtual bool canTrackChanges() const { return false; }
346 /// return true if the inset should be removed automatically
347 virtual bool autoDelete() const;
349 /// Returns true if the inset supports completions.
350 virtual bool completionSupported(Cursor const &) const { return false; }
351 /// Returns true if the inset supports inline completions at the
352 /// cursor position. In this case the completion might be stored
353 /// in the BufferView's inlineCompletion property.
354 virtual bool inlineCompletionSupported(Cursor const & /*cur*/) const
356 /// Return true if the inline completion should be automatic.
357 virtual bool automaticInlineCompletion() const { return true; }
358 /// Return true if the popup completion should be automatic.
359 virtual bool automaticPopupCompletion() const { return true; }
360 /// Return true if the cursor should indicate a completion.
361 virtual bool showCompletionCursor() const { return true; }
362 /// Returns completion suggestions at cursor position. Return an
363 /// null pointer if no completion is a available or possible.
364 /// The caller is responsible to free the returned object!
365 virtual CompletionList const * createCompletionList(Cursor const &) const
367 /// Returns the completion prefix to filter the suggestions for completion.
368 /// This is only called if completionList returned a non-null list.
369 virtual docstring completionPrefix(Cursor const &) const;
370 /// Do a completion at the cursor position. Return true on success.
371 /// The completion does not contain the prefix. If finished is true, the
372 /// completion is final. If finished is false, completion might only be
373 /// a partial completion.
374 virtual bool insertCompletion(Cursor & /*cur*/,
375 docstring const & /*completion*/, bool /*finished*/)
377 /// Get the completion inset position and size
378 virtual void completionPosAndDim(Cursor const &, int & /*x*/, int & /*y*/,
379 Dimension & /*dim*/) const {}
381 /// returns true if the inset can hold an inset of given type
382 virtual bool insetAllowed(InsetCode) const { return false; }
383 /// should this inset use the empty layout by default rather than
384 /// the standard layout? (default: only if that is forced.)
385 virtual bool usePlainLayout() const { return forcePlainLayout(); }
386 /// if this inset has paragraphs should they be forced to use the
388 virtual bool forcePlainLayout(idx_type = 0) const { return false; }
389 /// if this inset has paragraphs should the user be allowed to
390 /// customize alignment, etc?
391 virtual bool allowParagraphCustomization(idx_type = 0) const
393 /// Is the width forced to some value?
394 virtual bool hasFixedWidth() const { return false; }
396 /// Is the content of this inset part of the output document?
397 virtual bool producesOutput() const { return true; }
399 /// \return Tool tip for this inset.
400 /// This default implementation returns an empty string.
401 virtual docstring toolTip(BufferView const & bv, int x, int y) const;
403 /// \return Context menu identifier for this inset.
404 /// This default implementation returns an empty string.
405 virtual docstring contextMenu(BufferView const & bv, int x, int y) const;
407 // FIXME This should really disappear in favor of
408 // docstring name() const { return from_ascii(insetName(lyxCode()))); }
409 // There's no reason to be using different names in different places.
410 // But to do this we would need to change the file format, since the names
411 // used there don't correspond to what is used here.
413 virtual docstring name() const;
415 virtual InsetLayout const & getLayout() const;
416 /// Is this inset's layout defined in the document's textclass?
417 bool undefined() const;
418 /// used to toggle insets
419 /// is the inset open?
420 /// should this inset be handled like a normal charater
421 virtual bool isChar() const { return false; }
422 /// is this equivalent to a letter?
423 virtual bool isLetter() const { return false; }
424 /// is this equivalent to a space (which is BTW different from
425 /// a line separator)?
426 virtual bool isSpace() const { return false; }
427 /// is this an expandible space (rubber length)?
428 virtual bool isStretchableSpace() const { return false; }
437 /// should we have a non-filled line before this inset?
438 virtual DisplayType display() const { return Inline; }
440 virtual LyXAlignment contentAlignment() const { return LYX_ALIGN_NONE; }
441 /// should we break lines after this inset?
442 virtual bool isLineSeparator() const { return false; }
443 /// should paragraph indendation be ommitted in any case?
444 virtual bool neverIndent() const { return false; }
445 /// dumps content to lyxerr
446 virtual void dump() const;
447 /// write inset in .lyx format
448 virtual void write(std::ostream &) const {}
449 /// read inset in .lyx format
450 virtual void read(Lexer &) {}
451 /** Export the inset to LaTeX.
452 * Don't use a temporary stringstream if the final output is
453 * supposed to go to a file.
454 * \sa Buffer::writeLaTeXSource for the reason.
455 * \return the number of rows (\n's) of generated LaTeX code.
457 virtual int latex(odocstream &, OutputParams const &) const { return 0; }
458 /// returns true to override begin and end inset in file
459 virtual bool directWrite() const;
461 virtual bool allowSpellCheck() const { return false; }
463 /// if this insets owns text cells (e.g. InsetText) return cell num
464 virtual Text * getText(int /*num*/) const { return 0; }
466 /** Adds a LaTeX snippet to the Preview Loader for transformation
467 * into a bitmap image. Does not start the laoding process.
469 * Most insets have no interest in this capability, so the method
472 virtual void addPreview(DocIterator const &,
473 graphics::PreviewLoader &) const {}
475 /** Classifies the unicode characters appearing in a math inset
476 * depending on whether they are to be translated as latex
477 * math/text commands or used as math symbols without translation.
479 * Only math insets have interest in this classification, so the
480 * method defaults to empty.
482 virtual void initUnicodeMath() const {}
484 /// Add an entry to the TocList
485 /// pit is the ParConstIterator of the paragraph containing the inset
486 virtual void addToToc(DocIterator const &) {}
487 /// Fill keys with BibTeX information
488 virtual void fillWithBibKeys(BiblioInfo &, InsetIterator const &) const {}
489 /// Update the counters of this inset and of its contents.
490 /// The boolean indicates whether we are preparing for output, e.g.,
492 virtual void updateBuffer(ParIterator const &, UpdateType) {}
494 /// Updates the inset's dialog
495 virtual Buffer const * updateFrontend() const;
498 /// returns LyX code associated with the inset. Used for TOC, ...)
499 virtual InsetCode lyxCode() const { return NO_CODE; }
501 /// -1: text mode, 1: math mode, 0 undecided
502 enum mode_type {UNDECIDED_MODE, TEXT_MODE, MATH_MODE};
503 /// return text or mathmode if that is possible to determine
504 virtual mode_type currentMode() const { return UNDECIDED_MODE; }
505 /// returns whether changing mode during latex export is forbidden
506 virtual bool lockedMode() const { return false; }
507 /// returns whether only ascii chars are allowed during latex export
508 virtual bool asciiOnly() const { return false; }
509 /// returns whether this inset is allowed in other insets of given mode
510 virtual bool allowedIn(mode_type) const { return true; }
512 * Is this inset allowed within a font change?
514 * FIXME: noFontChange means currently that the font change is closed
515 * in LaTeX before the inset, and that the contents of the inset
516 * will be in default font. This should be changed so that the inset
517 * changes the font again.
519 virtual bool noFontChange() const { return false; }
521 /// set the change for the entire inset
522 virtual void setChange(Change const &) {}
523 /// accept the changes within the inset
524 virtual void acceptChanges() {}
525 /// reject the changes within the inset
526 virtual void rejectChanges() {}
529 virtual Dimension const dimension(BufferView const &) const;
531 int scroll() const { return 0; }
533 virtual ColorCode backgroundColor(PainterInfo const &) const;
535 virtual ColorCode labelColor() const;
537 enum { TEXT_TO_INSET_OFFSET = 4 };
541 Inset(Buffer * buf) : buffer_(buf) {}
542 Inset(Inset const &) : buffer_(0) {}
544 /// replicate ourselves
545 friend class InsetList;
546 friend class MathAtom;
547 virtual Inset * clone() const = 0;
549 /** The real dispatcher.
550 * Gets normally called from Cursor::dispatch(). Cursor::dispatch()
551 * assumes the common case of 'LFUN handled, need update'.
552 * This has to be overriden by calling Cursor::undispatched() or
553 * Cursor::noScreenUpdate() if appropriate.
554 * If you need to call the dispatch method of some inset directly
555 * you may have to explicitly request an update at that place. Don't
556 * do it in doDispatch(), since that causes nested updates when
557 * called from Cursor::dispatch(), and these can lead to crashes.
560 virtual void doDispatch(Cursor & cur, FuncRequest & cmd);