lyx_mirror/src/changes.h

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/**
* \file changes.h
* Copyright 2002 the LyX Team
* Read the file COPYING
*
* Record changes in a paragraph.
*
* \author John Levon <levon@movementarian.org>
*/
#ifndef CHANGES_H
#define CHANGES_H
#include "support/types.h"
#include "support/lyxtime.h"
#include <vector>
#include <iosfwd>
#include <ctime>
struct Change {
/// the type of change
enum Type {
UNCHANGED, // no change
INSERTED, // new text
DELETED // deleted text
};
Change(Type t = UNCHANGED, int a = 0, lyx::time_type ct = 0)
: type(t), author(a), changetime(ct) {}
Type type;
int author;
lyx::time_type changetime;
};
bool operator==(Change const & l, Change const & r);
bool operator!=(Change const & l, Change const & r);
class Changes {
public:
Changes(Change::Type type);
~Changes();
Changes(Changes const &);
/// reset "default" change type (for empty pars)
void reset(Change::Type type) {
empty_type_ = type;
}
/// set the position to the given change
void set(Change change, lyx::pos_type pos);
/// set the position to the given change
void set(Change::Type, lyx::pos_type pos);
/// set the range to the given change
void set(Change::Type, lyx::pos_type start, lyx::pos_type end);
/// set the range to the given change
void set(Change, lyx::pos_type start, lyx::pos_type end);
/// mark the given change and adjust
void record(Change, lyx::pos_type pos);
/// return the change type at the given position
Change::Type lookup(lyx::pos_type pos) const;
/// return the change at the given position
Change const lookupFull(lyx::pos_type pos) const;
/// return true if there is a change in the given range
bool isChange(lyx::pos_type start, lyx::pos_type end) const;
/// return true if there is a deleted or unchanged range contained
bool isChangeEdited(lyx::pos_type start, lyx::pos_type end) const;
/// remove the given entry
void erase(lyx::pos_type pos);
/// output latex to mark a transition between two changetypes
/// returns length of text outputted
static int latexMarkChange(std::ostream & os, Change::Type old, Change::Type change);
/// output .lyx file format for transitions between changes
static void lyxMarkChange(std::ostream & os, int & column,
lyx::time_type curtime, Change const & old, Change const & change);
private:
struct Range {
Range(lyx::pos_type s, lyx::pos_type e)
: start(s), end(e) {}
// does this range contain r ?
bool contains(Range const & r) const;
// does this range contain pos ?
bool contains(lyx::pos_type pos) const;
// does this range contain pos, or can it be appended ?
bool loose_contains(lyx::pos_type pos) const;
// is this range contained within r ?
bool contained(Range const & r) const;
// do the ranges intersect ?
bool intersects(Range const & r) const;
lyx::pos_type start;
lyx::pos_type end;
};
friend bool operator==(Range const & r1, Range const & r2);
friend bool operator!=(Range const & r1, Range const & r2);
struct ChangeRange {
ChangeRange(lyx::pos_type s, lyx::pos_type e, Change c)
: range(Range(s, e)), change(c) {}
Range range;
Change change;
};
typedef std::vector<ChangeRange> ChangeTable;
/// our table of changes
ChangeTable table_;
/// change type for an empty paragraph
Change::Type empty_type_;
/// handle a delete
void del(Change change, ChangeTable::size_type pos);
/// handle an add
void add(Change change, ChangeTable::size_type pos);
/// merge neighbouring ranges
void merge();
/// consistency check
void check() const;
};
#endif // CHANGES_H