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"
22 #include "OutputParams.h"
24 #include "support/docstring.h"
25 #include "support/strfwd.h"
26 #include "support/types.h"
45 class InsetCollapsible;
65 namespace graphics { class PreviewLoader; }
67 namespace support {class FileNameList; }
69 /// returns the InsetCode corresponding to the \c name.
70 /// Eg, insetCode("branch") == BRANCH_CODE
71 InsetCode insetCode(std::string const & name);
72 /// returns the Inset name corresponding to the \c InsetCode.
73 /// Eg, insetName(BRANCH_CODE) == "branch"
74 std::string insetName(InsetCode);
75 /// returns the Inset name corresponding to the \c InsetCode.
76 /// Eg, insetDisplayName(BRANCH_CODE) == _("Branch")
77 docstring insetDisplayName(InsetCode);
79 static int const TOC_ENTRY_LENGTH = 120;
81 /// Common base class to all insets
83 // Do not add _any_ (non-static) data members as this would inflate
84 // everything storing large quantities of insets. Mathed e.g. would
91 ENTRY_DIRECTION_IGNORE,
92 ENTRY_DIRECTION_RIGHT,
96 /// virtual base class destructor
99 /// change associated Buffer
100 virtual void setBuffer(Buffer & buffer);
101 /// reset associated Buffer to null value
102 virtual void resetBuffer();
103 /// retrieve associated Buffer
105 Buffer const & buffer() const;
106 /// Returns true if buffer_ actually points to a Buffer that has
107 /// been loaded into LyX and is still open. Note that this will
108 /// always return false for cloned Buffers. If you want to allow
109 /// for the case of cloned Buffers, use isBufferValid().
110 bool isBufferLoaded() const;
111 /// Returns true if this is a loaded buffer or a cloned buffer.
112 bool isBufferValid() const;
114 /// initialize view for this inset.
116 * This is typically used after this inset is created interactively.
117 * Intended purpose is to sanitize internal state with regard to current
120 virtual void initView() {}
121 /// \return true if this inset is labeled.
122 virtual bool isLabeled() const { return false; }
124 /// identification as math inset
125 virtual InsetMath * asInsetMath() { return nullptr; }
126 /// identification as math inset
127 virtual InsetMath const * asInsetMath() const { return nullptr; }
128 /// true for 'math' math inset, but not for e.g. mbox
129 virtual bool inMathed() const { return false; }
130 /// is this inset based on the InsetText class?
131 virtual InsetText * asInsetText() { return nullptr; }
132 /// is this inset based on the InsetText class?
133 virtual InsetText const * asInsetText() const { return nullptr; }
134 /// is this inset based on the InsetCollapsible class?
135 virtual InsetCollapsible * asInsetCollapsible() { return nullptr; }
136 /// is this inset based on the InsetCollapsible class?
137 virtual InsetCollapsible const * asInsetCollapsible() const { return nullptr; }
138 /// is this inset based on the InsetTabular class?
139 virtual InsetTabular * asInsetTabular() { return nullptr; }
140 /// is this inset based on the InsetTabular class?
141 virtual InsetTabular const * asInsetTabular() const { return nullptr; }
142 /// is this inset based on the InsetCommand class?
143 virtual InsetCommand * asInsetCommand() { return nullptr; }
144 /// is this inset based on the InsetCommand class?
145 virtual InsetCommand const * asInsetCommand() const { return nullptr; }
146 /// is this inset based on the InsetArgument class?
147 virtual InsetArgument const * asInsetArgument() const { return nullptr; }
148 /// is this inset based on the InsetGraphics class?
149 virtual InsetGraphics * asInsetGraphics() { return nullptr; }
150 /// is this inset based on the InsetGraphics class?
151 virtual InsetGraphics const * asInsetGraphics() const { return nullptr; }
153 /// the real dispatcher
154 void dispatch(Cursor & cur, FuncRequest & cmd);
156 * \returns true if this function made a definitive decision on
157 * whether the inset wants to handle the request \p cmd or not.
158 * The result of this decision is put into \p status.
160 * Every request that is enabled in this method needs to be handled
161 * in doDispatch(). Normally we have a 1:1 relationship between the
162 * requests handled in getStatus() and doDispatch(), but there are
164 * - A request that is disabled in getStatus() does not need to
165 * appear in doDispatch(). It is guaranteed that doDispatch()
166 * is never called with this request.
167 * - A few requests are en- or disabled in Inset::getStatus().
168 * These need to be handled in the doDispatch() methods of the
169 * derived insets, since Inset::doDispatch() has not enough
170 * information to handle them.
171 * - LFUN_MOUSE_* need not to be handled in getStatus(), because these
172 * are dispatched directly
174 virtual bool getStatus(Cursor & cur, FuncRequest const & cmd,
175 FuncStatus & status) const;
178 virtual void edit(Cursor & cur, bool front,
179 EntryDirection entry_from = ENTRY_DIRECTION_IGNORE);
180 /// sets cursor recursively descending into nested editable insets
182 \return the inset pointer if x,y is covering that inset
183 \param x,y are absolute screen coordinates.
185 /// Note: this method must preserve the selection status. See:
186 /// https://www.mail-archive.com/lyx-devel@lists.lyx.org/msg199001.html
187 virtual Inset * editXY(Cursor & cur, int x, int y);
189 /// The default margin inside text insets
190 static int textOffset(BufferView const *) { return 4; }
192 virtual int topOffset(BufferView const *bv) const { return textOffset(bv); }
194 virtual int bottomOffset(BufferView const *bv) const { return textOffset(bv); }
196 virtual int leftOffset(BufferView const *bv) const { return textOffset(bv); }
198 virtual int rightOffset(BufferView const *bv) const { return textOffset(bv); }
200 /// compute the size of the object returned in dim
201 virtual void metrics(MetricsInfo & mi, Dimension & dim) const = 0;
202 /// draw inset and update (xo, yo)-cache
203 virtual void draw(PainterInfo & pi, int x, int y) const = 0;
204 /// draw inset selection if necessary
205 virtual void drawSelection(PainterInfo &, int, int) const {}
206 /// draw inset background if the inset has an own background and a
207 /// selection is drawn by drawSelection.
208 virtual void drawBackground(PainterInfo &, int, int) const;
210 virtual bool editing(BufferView const * bv) const;
212 virtual bool showInsetDialog(BufferView *) const;
214 /// draw two angular markers
215 virtual void drawMarkers(PainterInfo & pi, int x, int y) const;
216 /// add space for markers
217 void metricsMarkers(Dimension & dim, int framesize = 1) const;
218 /// add space for markers
219 void metricsMarkers2(Dimension & dim, int framesize = 1) const;
220 /// draw inset decoration if necessary.
221 /// This can use \c drawMarkers() for example.
222 virtual void drawDecoration(PainterInfo &, int, int) const {}
224 /// last metrics computed for the inset
225 Dimension const dimension(BufferView const &) const;
226 /// last drawn position for 'important' insets
227 int xo(BufferView const & bv) const;
228 /// last drawn position for 'important' insets
229 int yo(BufferView const & bv) const;
230 /// do we cover screen position x/y?
231 bool covers(BufferView const & bv, int x, int y) const;
232 /// get the screen positions of the cursor (see note in Cursor.cpp)
233 virtual void cursorPos(BufferView const & bv,
234 CursorSlice const & sl, bool boundary, int & x, int & y) const;
236 /// Allow multiple blanks
237 virtual bool isFreeSpacing() const;
238 /// Don't eliminate empty paragraphs
239 virtual bool allowEmpty() const;
240 /// Force inset into LTR environment if surroundings are RTL
241 virtual bool forceLTR(OutputParams const &) const;
242 /// whether to include this inset in the strings generated for the TOC
243 virtual bool isInToc() const;
245 /// Where should we go when we press the up or down cursor key?
246 virtual bool idxUpDown(Cursor & cur, bool up) const;
247 /// Move one cell backwards
248 virtual bool idxBackward(Cursor &) const { return false; }
249 /// Move one cell forward
250 virtual bool idxForward(Cursor &) const { return false; }
252 /// Move to the next cell
253 virtual bool idxNext(Cursor &) const { return false; }
254 /// Move to the previous cell
255 virtual bool idxPrev(Cursor &) const { return false; }
257 /// Target pos when we enter the inset while moving forward
258 virtual bool idxFirst(Cursor &) const { return false; }
259 /// Target pos when we enter the inset while moving backwards
260 virtual bool idxLast(Cursor &) const { return false; }
262 /// Delete a cell and move cursor
263 virtual bool idxDelete(idx_type &) { return false; }
264 /// pulls cell after pressing erase
265 virtual void idxGlue(idx_type) {}
266 /// returns list of cell indices that are "between" from and to for
267 /// selection purposes
268 virtual bool idxBetween(idx_type idx, idx_type from, idx_type to) const;
270 /// to which column belongs a cell with a given index?
271 virtual col_type col(idx_type) const { return 0; }
272 /// to which row belongs a cell with a given index?
273 virtual row_type row(idx_type) const { return 0; }
274 /// cell index corresponding to row and column;
275 virtual idx_type index(row_type row, col_type col) const;
276 /// number of embedded cells
277 virtual size_t nargs() const { return 0; }
278 /// number of rows in gridlike structures
279 virtual size_t nrows() const { return 0; }
280 /// number of columns in gridlike structures
281 virtual size_t ncols() const { return 0; }
282 /// Is called when the cursor leaves this inset.
283 /// Returns true if cursor is now invalid, e.g. if former
284 /// insets in higher cursor slices of \c old do not exist
286 /// \c old is the old cursor, the last slice points to this.
287 /// \c cur is the new cursor. Use the update flags to cause a redraw.
288 virtual bool notifyCursorLeaves(Cursor const & /*old*/, Cursor & /*cur*/)
290 /// Is called when the cursor enters this inset.
291 /// Returns true if cursor is now invalid, e.g. if former
292 /// insets in higher cursor slices of \c old do not exist
294 /// \c cur is the new cursor, some slice points to this. Use the update
295 /// flags to cause a redraw.
296 virtual bool notifyCursorEnters(Cursor & /*cur*/)
298 /// is called when the mouse enters or leaves this inset
299 /// return true if this inset needs a repaint
300 virtual bool setMouseHover(BufferView const *, bool) const
302 /// return true if this inset is hovered (under mouse)
303 /// This is by now only used by mathed to draw corners
304 /// (Inset::drawMarkers() and Inset::drawMarkers2()).
305 /// Other insets do not have to redefine this function to
306 /// return the correct status of mouseHovered.
307 virtual bool mouseHovered(BufferView const *) const { return false; }
309 /// request "external features"
310 virtual void validate(LaTeXFeatures &) const {}
312 /// Validate LFUN_INSET_MODIFY argument.
313 virtual bool validateModifyArgument(docstring const &) const { return true; }
315 /// describe content if cursor inside
316 virtual void infoize(odocstream &) const {}
317 /// describe content if cursor behind
318 virtual void infoize2(odocstream &) const {}
320 enum { PLAINTEXT_NEWLINE = 10000 };
322 /// plain text output in ucs4 encoding
323 /// return the number of characters; in case of multiple lines of
324 /// output, add PLAINTEXT_NEWLINE to the number of chars in the last line
325 virtual int plaintext(odocstringstream &, OutputParams const &,
326 size_t max_length = INT_MAX) const = 0;
328 virtual void docbook(XMLStream &, OutputParams const &) const;
330 /// the inset is expected to write XHTML to the XMLStream
331 /// \return any "deferred" material that should be written outside the
332 /// normal stream, and which will in fact be written after the current
333 /// paragraph closes. this is appropriate e.g. for floats.
334 virtual docstring xhtml(XMLStream &, OutputParams const &) const;
336 /// Writes a string representation of the inset to the odocstream.
337 /// This one should be called when you want the whole contents of
339 virtual void toString(odocstream &) const {}
340 /// Appends a potentially abbreviated version of the inset to
341 /// \param str. Intended for use by the TOC.
342 virtual void forOutliner(docstring & str,
343 size_t const maxlen = TOC_ENTRY_LENGTH,
344 bool const shorten = true) const;
346 /// Can a cursor be put in there ?
347 /// Forced to false for insets that have hidden contents, like
348 /// InsetMathCommand and InsetInfo.
349 virtual bool isActive() const { return nargs() > 0; }
350 /// can the contents of the inset be edited on screen ?
351 // equivalent to isActive except for closed InsetCollapsible
352 virtual bool editable() const;
353 /// has the Inset settings that can be modified in a dialog ?
354 virtual bool hasSettings() const;
355 /// can we go further down on mouse click?
356 /// true for InsetCaption, InsetCollapsibles (not ButtonOnly), InsetTabular
357 virtual bool descendable(BufferView const &) const { return false; }
358 /// can we click at the specified position ?
359 virtual bool clickable(BufferView const &, int, int) const { return false; }
360 /// Move one cell backwards
361 virtual bool allowsCaptionVariation(std::string const &) const { return false; }
362 // true for insets that have a table structure (InsetMathGrid, InsetTabular)
363 virtual bool isTable() const { return false; }
365 /// does this contain text that can be change track marked in DVI?
366 virtual bool canTrackChanges() const { return false; }
367 /// Will this inset paint its own change tracking status (in the parent
368 /// paragraph) or will it let RowPainter handle it?
369 virtual bool canPaintChange(BufferView const &) const { return false; }
370 /// return true if the inset should be removed automatically
371 virtual bool autoDelete() const;
373 /// Returns true if the inset supports completions.
374 virtual bool completionSupported(Cursor const &) const { return false; }
375 /// Returns true if the inset supports inline completions at the
376 /// cursor position. In this case the completion might be stored
377 /// in the BufferView's inlineCompletion property.
378 virtual bool inlineCompletionSupported(Cursor const & /*cur*/) const
380 /// Return true if the inline completion should be automatic.
381 virtual bool automaticInlineCompletion() const { return true; }
382 /// Return true if the popup completion should be automatic.
383 virtual bool automaticPopupCompletion() const { return true; }
384 /// Return true if the cursor should indicate a completion.
385 virtual bool showCompletionCursor() const { return true; }
386 /// Returns completion suggestions at cursor position. Return an
387 /// null pointer if no completion is a available or possible.
388 /// The caller is responsible to free the returned object!
389 virtual CompletionList const * createCompletionList(Cursor const &) const
391 /// Returns the completion prefix to filter the suggestions for completion.
392 /// This is only called if completionList returned a non-null list.
393 virtual docstring completionPrefix(Cursor const &) const;
394 /// Do a completion at the cursor position. Return true on success.
395 /// The completion does not contain the prefix. If finished is true, the
396 /// completion is final. If finished is false, completion might only be
397 /// a partial completion.
398 virtual bool insertCompletion(Cursor & /*cur*/,
399 docstring const & /*completion*/, bool /*finished*/)
401 /// Get the completion inset position and size
402 virtual void completionPosAndDim(Cursor const &, int & /*x*/, int & /*y*/,
403 Dimension & /*dim*/) const {}
405 /// returns true if the inset can hold an inset of given type
406 virtual bool insetAllowed(InsetCode) const { return false; }
407 /// should this inset use the empty layout by default rather than
408 /// the standard layout? (default: only if that is forced.)
409 virtual bool usePlainLayout() const { return forcePlainLayout(); }
410 /// if this inset has paragraphs should they be forced to use the
412 virtual bool forcePlainLayout(idx_type = 0) const { return false; }
413 /// if this inset has paragraphs should the user be allowed to
414 /// customize alignment, etc?
415 virtual bool allowParagraphCustomization(idx_type = 0) const
417 /// Is the width forced to some value?
418 virtual bool hasFixedWidth() const { return false; }
419 /// if this inset has paragraphs should they be forced to use a
420 /// local font language switch?
421 virtual bool forceLocalFontSwitch() const { return false; }
422 /// if this inset has paragraphs should they be forced to use a
423 /// font language switch that switches paragraph directions
424 /// (relevant with polyglossia only)?
425 virtual bool forceParDirectionSwitch() const { return false; }
426 /// Does the inset force a specific encoding?
427 virtual Encoding const * forcedEncoding(Encoding const *, Encoding const *) const
431 /// Is the content of this inset part of the output document?
432 virtual bool producesOutput() const { return true; }
433 /// Is the content of this inset part of the immediate (visible) text sequence?
434 virtual bool isPartOfTextSequence() const { return producesOutput(); }
436 /// \return Tool tip for this inset.
437 /// This default implementation returns an empty string. This can be
438 /// either plain text or Qt html, and formatToolTip will be called
439 /// on it before display in both cases.
440 virtual docstring toolTip(BufferView const & bv, int x, int y) const;
442 /// \return Context menu identifier. This function determines
443 /// whose Inset's menu should be shown for the given position.
444 virtual std::string contextMenu(BufferView const & bv, int x, int y) const;
446 /// \return Context menu identifier for this inset.
447 /// This default implementation returns an empty string.
448 virtual std::string contextMenuName() const;
451 virtual docstring layoutName() const;
453 virtual InsetLayout const & getLayout() const;
455 virtual bool isPassThru() const;
456 /// Is this inset embedded in a title?
457 virtual bool isInTitle() const { return false; }
458 /// Is this inset's layout defined in the document's textclass?
459 bool undefined() const;
460 /// should this inset be handled like a normal character?
461 /// (a character can be a letter or punctuation)
462 virtual bool isChar() const { return false; }
463 /// is this equivalent to a letter?
464 /// (a letter is a character that is considered part of a word)
465 virtual bool isLetter() const { return false; }
466 /// is this equivalent to a space (which is BTW different from
467 /// a line separator)?
468 virtual bool isSpace() const { return false; }
469 /// returns chars, words if the inset is equivalent to such, otherwise
470 /// (0,0), which should be interpreted as 'false'
471 virtual std::pair<int, int> isWords() const { return std::pair<int,int>(0, 0); }
472 /// does this inset try to use all available space (like \\hfill does)?
473 virtual bool isHfill() const { return false; }
475 virtual CtObject getCtObject(OutputParams const &) const;
479 // break row before this inset
480 BreakBefore = 1 << 0,
481 // break row after this inset
483 // it is possible to break after this inset
484 CanBreakAfter = 1 << 2,
485 // force new (maybe empty) row after this inset
487 // specify an alignment (left, right) for a display inset
488 // (default is center)
491 // A display inset breaks row at both ends
492 Display = BreakBefore | BreakAfter
495 /// How should this inset be displayed in its row?
496 virtual RowFlags rowFlags() const { return Inline; }
497 /// indentation before this inset (only needed for displayed hull insets with fleqn option)
498 virtual int indent(BufferView const &) const { return 0; }
500 virtual LyXAlignment contentAlignment() const { return LYX_ALIGN_NONE; }
501 /// should we break lines after this inset?
502 virtual bool isLineSeparator() const { return false; }
503 /// should paragraph indentation be omitted in any case?
504 virtual bool neverIndent() const { return false; }
505 /// dumps content to lyxerr
506 virtual void dump() const;
507 /// write inset in .lyx format
508 virtual void write(std::ostream &) const {}
509 /// read inset in .lyx format
510 virtual void read(Lexer &) {}
511 /** Export the inset to LaTeX.
512 * Don't use a temporary stringstream if the final output is
513 * supposed to go to a file.
514 * \sa Buffer::writeLaTeXSource for the reason.
516 virtual void latex(otexstream &, OutputParams const &) const {}
517 /// returns true to override begin and end inset in file
518 virtual bool directWrite() const;
520 virtual bool allowSpellCheck() const { return false; }
522 /// if this insets owns text cells (e.g. InsetText) return cell idx
523 virtual Text * getText(int /*idx*/) const { return 0; }
525 /** Adds a LaTeX snippet to the Preview Loader for transformation
526 * into a bitmap image. Does not start the loading process.
528 * Most insets have no interest in this capability, so the method
531 virtual void addPreview(DocIterator const &,
532 graphics::PreviewLoader &) const {}
534 /** Classifies the unicode characters appearing in a math inset
535 * depending on whether they are to be translated as latex
536 * math/text commands or used as math symbols without translation.
538 * Only math insets have interest in this classification, so the
539 * method defaults to empty.
541 virtual void initUnicodeMath() const {}
543 /// Add an entry to the TocList
544 /// Pass a DocIterator that points at the paragraph containing
547 /// \param output_active : is the inset active or is it in an inactive
548 /// branch or a note?
550 /// \param utype : is the toc being generated for use by the output
553 /// \param tocbackend : where to add the toc information.
554 virtual void addToToc(DocIterator const & /* di */,
555 bool /* output_active */,
556 UpdateType /* utype*/,
557 TocBackend & /* tocbackend */) const {}
558 /// Collect BibTeX information
559 virtual void collectBibKeys(InsetIterator const &, support::FileNameList &) const {}
560 /// Update the counters of this inset and of its contents.
561 /// The boolean indicates whether we are preparing for output, e.g.,
563 virtual void updateBuffer(ParIterator const &, UpdateType, bool const) {}
565 /// Updates the inset's dialog
566 virtual Buffer const * updateFrontend() const;
569 /// returns LyX code associated with the inset. Used for TOC, ...)
570 virtual InsetCode lyxCode() const { return NO_CODE; }
573 enum mode_type {UNDECIDED_MODE, TEXT_MODE, MATH_MODE};
574 /// return text or mathmode if that is possible to determine
575 virtual mode_type currentMode() const { return UNDECIDED_MODE; }
576 /// returns whether changing mode during latex export is forbidden
577 virtual bool lockedMode() const { return false; }
578 /// returns whether only ascii chars are allowed during latex export
579 virtual bool asciiOnly() const { return false; }
580 /// returns whether this inset is allowed in other insets of given mode
581 virtual bool allowedIn(mode_type) const { return true; }
582 /// returns whether paragraph breaks can occur inside this inset
583 virtual bool allowMultiPar() const { return false; }
585 * The font is inherited from the parent for LaTeX export if this
586 * method returns true. No open font changes are closed in front of
587 * the inset for LaTeX export, and the font is inherited for all other
588 * exports as well as on screen.
589 * If this method returns false all open font changes are closed in
590 * front of the inset for LaTeX export. The default font is used
591 * inside the inset for all exports and on screen.
593 virtual bool inheritFont() const { return true; }
595 * If this method returns true all explicitly set font attributes
596 * are reset during editing operations.
597 * For copy/paste operations the language is never changed, since
598 * the language of a given text never changes if the text is
599 * formatted differently, while other font attributes like size may
600 * need to change if the text is copied from one environment to
602 * If this method returns false no font attribute is reset.
603 * The default implementation returns true if the resetFont layout
604 * tag is set and otherwise the negation of inheritFont(),
605 * since inherited inset font attributes do not need to be changed,
606 * and non-inherited ones need to be set explicitly.
608 virtual bool resetFontEdit() const;
610 /// does the inset contain changes ?
611 virtual bool isChanged() const { return false; }
612 /// set the change for the entire inset
613 virtual void setChange(Change const &) {}
614 /// accept the changes within the inset
615 virtual void acceptChanges() {}
616 /// reject the changes within the inset
617 virtual void rejectChanges() {}
620 virtual bool needsCProtection(bool const, bool const) const { return false; }
623 virtual ColorCode backgroundColor(PainterInfo const &) const;
625 virtual ColorCode labelColor() const;
627 /// Determine the action of backspace and delete: do we select instead of
628 /// deleting if not already selected?
629 virtual bool confirmDeletion() const { return false; }
633 Inset(Buffer * buf) : buffer_(buf) {}
634 Inset(Inset const &) : buffer_(0) {}
636 /// replicate ourselves
637 friend class InsetList;
638 friend class MathAtom;
639 virtual Inset * clone() const = 0;
641 /** The real dispatcher.
642 * Gets normally called from Cursor::dispatch(). Cursor::dispatch()
643 * assumes the common case of 'LFUN handled, need update'.
644 * This has to be overridden by calling Cursor::undispatched() or
645 * Cursor::noScreenUpdate() if appropriate.
646 * If you need to call the dispatch method of some inset directly
647 * you may have to explicitly request an update at that place. Don't
648 * do it in doDispatch(), since that causes nested updates when
649 * called from Cursor::dispatch(), and these can lead to crashes.
652 virtual void doDispatch(Cursor & cur, FuncRequest & cmd);
658 inline Inset::RowFlags operator|(Inset::RowFlags const d1,
659 Inset::RowFlags const d2)
661 return static_cast<Inset::RowFlags>(int(d1) | int(d2));
665 inline Inset::RowFlags operator&(Inset::RowFlags const d1,
666 Inset::RowFlags const d2)
668 return static_cast<Inset::RowFlags>(int(d1) & int(d2));