lyx_mirror/src/cursor.h
Georg Baum 1354f4b6d6 Unicode: Avoid another from_utf8(to_utf8()) roundtrip
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15854 a592a061-630c-0410-9148-cb99ea01b6c8
2006-11-11 11:27:47 +00:00

314 lines
8.2 KiB
C++

// -*- C++ -*-
/**
* \file cursor.h
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author André Pönitz
*
* Full author contact details are available in file CREDITS.
*/
#ifndef CURSOR_H
#define CURSOR_H
#include "dispatchresult.h"
#include "dociterator.h"
#include <iosfwd>
#include <vector>
namespace lyx {
class Buffer;
class BufferView;
class FuncStatus;
class FuncRequest;
class LyXFont;
// these should go
class InsetMathUnknown;
class Encoding;
/// The cursor class describes the position of a cursor within a document.
// The public inheritance should go in favour of a suitable data member
// (or maybe private inheritance) at some point of time.
class LCursor : public DocIterator {
public:
/// create the cursor of a BufferView
explicit LCursor(BufferView & bv);
/// dispatch from innermost inset upwards
void dispatch(FuncRequest const & cmd);
/// get the resut of the last dispatch
DispatchResult result() const;
/// add a new cursor slice
void push(InsetBase & inset);
/// add a new cursor slice, place cursor on left end
void pushLeft(InsetBase & inset);
/// pop one level off the cursor
void pop();
/// pop one slice off the cursor stack and go left
bool popLeft();
/// pop one slice off the cursor stack and go right
bool popRight();
/// make sure we are outside of given inset
void leaveInset(InsetBase const & inset);
/// sets cursor part
void setCursor(DocIterator const & it);
//
// selection
//
/// selection active?
bool selection() const { return selection_; }
/// selection active?
bool & selection() { return selection_; }
/// did we place the anchor?
bool mark() const { return mark_; }
/// did we place the anchor?
bool & mark() { return mark_; }
///
void setSelection();
/// set selection at given position
void setSelection(DocIterator const & where, int n);
///
void clearSelection();
/// access start of selection
CursorSlice selBegin() const;
/// access end of selection
CursorSlice selEnd() const;
/// access start of selection
DocIterator selectionBegin() const;
/// access start of selection
DocIterator selectionEnd() const;
///
bool selHandle(bool selecting);
//
docstring selectionAsString(bool label) const;
///
std::string currentState();
/// auto-correct mode
bool autocorrect() const { return autocorrect_; }
/// auto-correct mode
bool & autocorrect() { return autocorrect_; }
/// are we entering a macro name?
bool macromode() const { return macromode_; }
/// are we entering a macro name?
bool & macromode() { return macromode_; }
/// returns x,y position
void getPos(int & x, int & y) const;
//
// common part
//
/// move one step to the left
bool posLeft();
/// move one step to the right
bool posRight();
/// insert an inset
void insert(InsetBase *);
/// insert a single char
void insert(char_type c);
/// insert a string
void insert(docstring const & str);
/// in pixels from left of screen
int targetX() const;
/// write acess to target x position of cursor
int & x_target();
/// return target x position of cursor
int x_target() const;
/// set targetX in current position
void setTargetX();
/// clear target x position of cursor
void clearTargetX();
/// access to normalized selection anchor
CursorSlice anchor() const;
/// sets anchor to cursor position
void resetAnchor();
/// access to owning BufferView
BufferView & bv() const;
/// access to owning Buffer
Buffer & buffer() const;
/// get some interesting description of top position
void info(odocstream & os) const;
/// are we in math mode (2), text mode (1) or unsure (0)?
int currentMode();
/// reset cursor bottom to the beginning of the given inset
// (sort of 'chroot' environment...)
void reset(InsetBase &);
/// for spellchecking
void replaceWord(std::string const & replacestring);
/**
* the event was not (yet) dispatched.
*
* Should only be called by an inset's doDispatch() method. It means:
* I, the doDispatch() method of InsetFoo, hereby declare that I am
* not able to handle that request and trust my parent will do the
* Right Thing (even if my getStatus partner said that I can do it).
* It is sort of a kludge that should be used only rarely...
*/
void undispatched();
/// the event was already dispatched
void dispatched();
/// Set which update should be done
void updateFlags(Update::flags f);
/**
* don't call update() when done
*
* Should only be called by an inset's doDispatch() method. It means:
* I handled that request and I can reassure you that the screen does
* not need to be re-drawn and all entries in the coord cache stay
* valid (and there are no other things to put in the coord cache).
* This is a fairly rare event as well and only some optimization.
* Not using noUpdate() should never be wrong.
*/
void noUpdate();
/// fix cursor in circumstances that should never happen
void fixIfBroken();
/// output
friend std::ostream & operator<<(std::ostream & os, LCursor const & cur);
public:
///
BufferView * bv_;
//private:
/// the anchor position
DocIterator anchor_;
///
DispatchResult disp_;
private:
/**
* The target x position of the cursor. This is used for when
* we have text like :
*
* blah blah blah blah| blah blah blah
* blah blah blah
* blah blah blah blah blah blah
*
* When we move onto row 3, we would like to be vertically aligned
* with where we were in row 1, despite the fact that row 2 is
* shorter than x()
*/
int x_target_;
/// do we have a selection?
bool selection_;
/// are we on the way to get one?
bool mark_;
/// 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_;
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
// cursor. This should be either generalized for texted or moved
// back to the math insets.
//
///////////////////////////////////////////////////////////////////
public:
///
void insert(MathAtom const &);
///
void insert(MathArray const &);
/// return false for empty math insets
bool erase();
/// return false for empty math insets
bool backspace();
/// called for LFUN_UP etc
bool up();
/// called for LFUN_DOWN etc
bool down();
///
void plainErase();
///
void plainInsert(MathAtom const & at);
///
void niceInsert(MathAtom const & at);
///
void niceInsert(docstring const & str);
/// in pixels from top of screen
void setScreenPos(int x, int y);
/// current offset in the top cell
/// interpret name a name of a macro. Returns true if
/// something got inserted.
bool macroModeClose();
/// are we currently typing the name of a macro?
bool inMacroMode() const;
/// get access to the macro we are currently typing
InsetMathUnknown * activeMacro();
/// replace selected stuff with at, placing the former
// selection in given cell of atom
void handleNest(MathAtom const & at, int cell = 0);
///
bool isInside(InsetBase const *);
/// make sure cursor position is valid
void normalize();
/// mark current cursor trace for redraw
void touch();
/// hack for reveal codes
void markInsert();
void markErase();
/// injects content of a cell into parent
void pullArg();
/// split font inset etc
void handleFont(std::string const & font);
/// display a message
void message(docstring const & msg) const;
/// display an error message
void errorMessage(docstring const & msg) const;
///
docstring getPossibleLabel();
/// moves position somehow up or down
bool goUpDown(bool up);
/// the name of the macro we are currently inputting
docstring macroName();
/// where in the curent cell does the macro name start?
int macroNamePos();
/// can we enter the inset?
bool openable(MathAtom const &) const;
///
Encoding const * getEncoding() const;
/// font at cursor position
LyXFont getFont() const;
};
} // namespace lyx
#endif // LYXCURSOR_H