* Full author contact details are available in file CREDITS.
*/
+/*
+First some explanation about what a Cursor really is, from local to
+global.
+
+* a CursorSlice indicates the position of the cursor at local level.
+ It contains in particular:
+ * idx(): the cell that contains the cursor (for Tabular or math
+ arrays). Always 0 for 'plain' insets
+ * pit(): the index of the current paragraph (only for text)
+ * pos(): the position in the current paragraph (or in the math
+ equation in mathed).
+ * inset(): the inset in which the cursor is. For a InsetTabular,
+ this is the tabular itself, not the cell inset (which is an
+ InsetTableCell).
+
+* a DocIterator indicated the position of the cursor in the document.
+ It knows about the current buffer (buffer() method) and contains a
+ vector of CursorSlices that describes the nesting of insets up to the
+ point of interest. Note that operator<< has been implemented, so that
+ one can send a DocIterator to a stream to see its value. Try it, it is
+ very helpful to understand the cursor layout.
+ * when using idx/pit/pos on a DocIterator, one gets the information
+ from the inner slice (this slice can be accessed as top())
+ * inMathed() returns true when the cursor is in a math formula
+ * inTexted() returns true when the cursor is in text
+ * innerTextSlice() returns the deepest slice that is text (useful
+ when one is in a math equation and looks for the enclosing text)
+
+* A CursorData is a descendant of Dociterator that contains
+ * a second DocIterator object, the anchor, that is useful when
+ selecting.
+ * some other data that describes current selection, cursor font, etc.
+
+ This class is mostly used only for undo and contains the Cursor
+ elements that are not GUI-related. In LyX 2.0, Cursor was directly
+ deriving from DocIterator
+
+* A Cursor is a descendant of CursorData that contains interesting
+ display-related information, in particular targetX(), the horizontal
+ position of the cursor in pixels.
+*/
+
#ifndef LCURSOR_H
#define LCURSOR_H
#include "mathed/MathParser_flags.h"
-#include <vector>
-
namespace lyx {
class InsetMathUnknown;
class Encoding;
+/**
+ * This class describes the position of a cursor within a document,
+ * but does not contain any detail about the view. It is currently
+ * only used to save cursor position in Undo, but culd be extended to
+ * handle the methods that only need this data.
+ **/
+class CursorData : public DocIterator
+{
+public:
+ ///
+ CursorData();
+ ///
+ explicit CursorData(Buffer * buffer);
+ ///
+ explicit CursorData(DocIterator const & dit);
+ /// output
+ friend std::ostream & operator<<(std::ostream & os, CursorData const & cur);
+ friend LyXErr & operator<<(LyXErr & os, CursorData const & cur);
+
+protected:
+ /// the anchor position
+ DocIterator anchor_;
+ /// do we have a selection?
+ bool selection_;
+ /// are we on the way to get one?
+ bool mark_;
+ /// are we in word-selection mode? This is set when double clicking.
+ bool word_selection_;
+
+// FIXME: make them protected.
+public:
+ /// the current font settings
+ Font current_font;
+ /// the current font
+ Font real_current_font;
+
+protected:
+
+ //
+ // math specific stuff that could be promoted to "global" later
+ //
+ /// do we allow autocorrection
+ bool autocorrect_;
+ /// are we entering a macro name?
+ bool macromode_;
+};
+
/// The cursor class describes the position of a cursor within a document.
-class Cursor : public DocIterator
+class Cursor : public CursorData
{
public:
/// create the cursor of a BufferView
bool popForward();
/// make sure we are outside of given inset
void leaveInset(Inset const & inset);
+ /// set the cursor data
+ void setCursorData(CursorData const & data);
/// sets cursor part
+ /// this (intentionally) does neither touch anchor nor selection status
void setCursor(DocIterator const & it);
+ /// set the cursor to dit normalised against the anchor, and set selection.
+ void setCursorSelectionTo(DocIterator dit);
/// sets the cursor to the normalized selection anchor
void setCursorToAnchor();
//
/// selection active?
bool selection() const { return selection_; }
- /// set selection;
- void setSelection(bool sel) { selection_ = sel; }
+ /// set selection; this is lower level than (set|clear)Selection
+ void selection(bool sel) { selection_ = sel; }
/// do we have a multicell selection?
bool selIsMultiCell() const
{ return selection_ && selBegin().idx() != selEnd().idx(); }
CursorSlice selEnd() const;
/// access start of selection
DocIterator selectionBegin() const;
- /// access start of selection
+ /// access end of selection
DocIterator selectionEnd() const;
/**
* Update the selection status and save permanent
bool macromode() const { return macromode_; }
/// are we entering a macro name?
bool & macromode() { return macromode_; }
+
+ /// returns true when all insets in cursor stack are in cache
+ bool inCoordCache() const;
/// returns x,y position
void getPos(int & x, int & y) const;
/// return logical positions between which the cursor is situated
* If the cursor is at the edge of a row, the position which is "over the
* edge" will be returned as -1.
*/
- void getSurroundingPos(pos_type & left_pos, pos_type & right_pos);
+ void getSurroundingPos(pos_type & left_pos, pos_type & right_pos) const;
/// the row in the paragraph we're in
Row const & textRow() const;
//
// common part
//
- /// move one step backwards
- bool posBackward();
- /// move one step forward
- bool posForward();
/// move visually one step to the right
/**
* @note: This method may move into an inset unless skip_inset == true.
bool posVisToNewRow(bool movingLeft);
/// move to right or left extremity of the current row
void posVisToRowExtremity(bool left);
+ /// Should interpretation of the arrow keys be reversed?
+ bool reverseDirectionNeeded() const;
/// insert an inset
void insert(Inset *);
/// access to normalized selection anchor
CursorSlice normalAnchor() const;
- // FIXME: this can't be a const & and a const function because
- // LFUN_TAB_* wants to move the real anchor.
/// access to real selection anchor
- DocIterator & realAnchor();
+ DocIterator const & realAnchor() const { return anchor_; }
+ DocIterator & realAnchor() { return anchor_; }
/// sets anchor to cursor position
void resetAnchor();
/// access to owning BufferView
*/
void noScreenUpdate() const;
/// fix cursor in circumstances that should never happen.
- /// \retval true if a fix occured.
+ /// \retval true if a fix occurred.
bool fixIfBroken();
-
- /// output
- friend std::ostream & operator<<(std::ostream & os, Cursor const & cur);
- friend LyXErr & operator<<(LyXErr & os, Cursor const & cur);
+ /// Repopulate the slices insets from bottom to top. Useful
+ /// for stable iterators or Undo data.
+ void sanitize();
///
bool textUndo();
void endUndoGroup() const;
/// The general case: prepare undo for an arbitrary range.
- void recordUndo(UndoKind kind, pit_type from, pit_type to) const;
+ void recordUndo(pit_type from, pit_type to) const;
/// Convenience: prepare undo for the range between 'from' and cursor.
- void recordUndo(UndoKind kind, pit_type from) const;
+ void recordUndo(pit_type from) const;
/// Convenience: prepare undo for the single paragraph or cell
/// containing the cursor
void recordUndo(UndoKind kind = ATOMIC_UNDO) const;
/// Convenience: prepare undo for the inset containing the cursor
- void recordUndoInset(UndoKind kind = ATOMIC_UNDO,
- Inset const * inset = 0) const;
+ void recordUndoInset(Inset const * inset = 0) const;
/// Convenience: prepare undo for the whole buffer
- void recordUndoFullDocument() const;
+ void recordUndoFullBuffer() const;
+
+ /// Convenience: prepare undo for buffer parameters
+ void recordUndoBufferParams() const;
/// Convenience: prepare undo for the selected paragraphs or cells
void recordUndoSelection() const;
void checkBufferStructure();
/// hook for text input to maintain the "new born word"
- void markEditPosition();
+ void markNewWordPosition();
/// The position of the new born word
/// As the user is entering a word without leaving it
/// and after leaving the word the result is empty.
DocIterator newWord() const { return new_word_; }
+ /// Return true if the next or previous inset has confirmDeletion depending
+ /// on the boolean before. If there is a selection, return true if at least
+ /// one inset in the selection has confirmDeletion.
+ bool confirmDeletion(bool before = false) const;
+
+ /// Determine if x falls to the left or to the side of the middle of the
+ /// inset, and advance the cursor to match this position. If edit is true,
+ /// keep the cursor in front of the inset if it matter for dialogs.
+ /// Note: it does not handle RTL text yet, and is only used in math for now.
+ void moveToClosestEdge(int x, bool edit = false);
+
public:
//private:
private:
///
BufferView * bv_;
- /// the anchor position
- DocIterator anchor_;
- /// the start of the new born word
- DocIterator new_word_;
///
mutable DispatchResult disp_;
/**
int x_target_;
/// if a x_target cannot be hit exactly in a text, put the difference here
int textTargetOffset_;
- /// do we have a selection?
- bool selection_;
- /// are we on the way to get one?
- bool mark_;
- /// are we in word-selection mode? This is set when double clicking.
- bool word_selection_;
- /// If true, we are behind the previous char, otherwise we are in front
- // of the next char. This only make a difference when we are in front
- // of a big inset spanning a whole row and computing coordinates for
- // displaying the cursor.
- bool logicalpos_;
+ /// the start of the new born word
+ DocIterator new_word_;
/// position before dispatch started
DocIterator beforeDispatchCursor_;
/// cursor screen coordinates before dispatch started
int beforeDispatchPosX_;
int beforeDispatchPosY_;
-
-// FIXME: make them private.
-public:
- /// the current font settings
- Font current_font;
- /// the current font
- Font real_current_font;
-
-private:
-
- //
- // math specific stuff that could be promoted to "global" later
- //
- /// do we allow autocorrection
- bool autocorrect_;
- /// are we entering a macro name?
- bool macromode_;
-
-
///////////////////////////////////////////////////////////////////
//
// The part below is the non-integrated rest of the original math
///
void insert(MathData const &);
/// return false for empty math insets
- bool erase();
- /// return false for empty math insets
- bool backspace();
+ /// Use force to skip the confirmDeletion check.
+ bool erase(bool force = false);
+ bool backspace(bool force = false);
+
/// move the cursor up by sending an internal LFUN_UP
/// return true if fullscreen update is needed
bool up();
/// return true if successful
bool upDownInMath(bool up);
///
+ InsetMath & nextMath();
+ ///
+ InsetMath & prevMath();
+ /// move forward in math. word: whether to skip a whole "word" (insets with
+ /// the same mathclass)
+ bool mathForward(bool word);
+ ///
+ bool mathBackward(bool word);
+ ///
void plainErase();
///
void plainInsert(MathAtom const & at);
/**
- * Notifies all insets which appear in old, but not in cur. And then
- * notify all insets which appear in cur, but not in old.
- * Make sure that the cursor old is valid, i.e. all inset pointers
- * point to valid insets! Use Cursor::fixIfBroken if necessary.
+ * Notifies all insets which appear in \c old, but not in \c cur. And then
+ * notify all insets which appear in \c cur, but not in \c old.
+ * \returns true if cursor is now invalid, e.g. if some insets in
+ * higher cursor slices of \c old do not exist anymore. In this case
+ * it may be necessary to use Use Cursor::fixIfBroken.
*/
bool notifyCursorLeavesOrEnters(Cursor const & old, Cursor & cur);