lyx_mirror/src/Changes.h

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// -*- C++ -*-
/**
* \file Changes.h
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author John Levon
* \author Michael Gerz
*
* Full author contact details are available in file CREDITS.
*
* Record changes in a paragraph.
*/
#ifndef CHANGES_H
#define CHANGES_H
#include "Color.h"
#include "support/docstream.h"
#include "support/strfwd.h"
#include "support/types.h"
#include "support/lyxtime.h"
#include <vector>
namespace lyx {
class AuthorList;
class Buffer;
class DocIterator;
class OutputParams;
class Change {
public:
/// the type of change
enum Type {
UNCHANGED, // no change
INSERTED, // new text
DELETED // deleted text
};
explicit Change(Type t = UNCHANGED, int a = 0, time_t ct = current_time())
: type(t), author(a), changetime(ct) {}
/// is the change similar to the given change such that both can be merged?
bool isSimilarTo(Change const & change) const;
/// The color of this change on screen
Color color() const;
///
bool changed() const { return type != UNCHANGED; }
///
void setUnchanged() { type = UNCHANGED; }
///
bool inserted() const { return type == INSERTED; }
///
void setInserted() { type = INSERTED; }
///
bool deleted() const { return type == DELETED; }
///
void setDeleted() { type = DELETED; }
/// Is this change made by the current author ?
bool currentAuthor() const { return author == 0; }
Type type;
int author;
time_t changetime;
};
bool operator==(Change const & l, Change const & r);
bool operator!=(Change const & l, Change const & r);
class BufferParams;
class Changes {
public:
/// set the pos to the given change
void set(Change const & change, pos_type pos);
/// set the range (excluding end) to the given change
void set(Change const & change, pos_type start, pos_type end);
/// erase the entry at pos and adjust all range bounds past it
/// (assumes that a character was deleted at pos)
void erase(lyx::pos_type pos);
/// insert a new entry at pos and adjust all range bounds past it
/// (assumes that a character was inserted at pos)
void insert(Change const & change, lyx::pos_type pos);
///
/// return the change at the given pos
Change const & lookup(pos_type pos) const;
/// return true if there is a change in the given range (excluding end)
bool isChanged(pos_type start, pos_type end) const;
/// return true if the whole range is deleted
bool isDeleted(pos_type start, pos_type end) const;
/// output latex to mark a transition between two change types
/// returns length of text outputted
static int latexMarkChange(odocstream & os, BufferParams const & bparams,
Change const & oldChange, Change const & change,
OutputParams const & runparams);
/// output .lyx file format for transitions between changes
static void lyxMarkChange(std::ostream & os, BufferParams const & bparams,
int & column, Change const & old, Change const & change);
///
void checkAuthors(AuthorList const & authorList);
///
void addToToc(DocIterator const & cdit, Buffer const & buffer) const;
private:
class Range {
public:
Range(pos_type s, pos_type e)
: start(s), end(e) {}
// does this range contain r ? (inlined as the result of profiling)
bool contains(Range const & r) const {
return r.start >= start && r.end <= end;
}
// does this range contain pos ? (inlined as the result of profiling)
bool contains(pos_type pos) const {
return pos >= start && pos < end;
}
// do the ranges intersect ?
bool intersects(Range const & r) const;
pos_type start;
pos_type end; // Caution: end is not in the range!
};
friend bool operator==(Range const & r1, Range const & r2);
friend bool operator!=(Range const & r1, Range const & r2);
class ChangeRange {
public:
ChangeRange(Change const & c, Range const & r)
: change(c), range(r) {}
Change change;
Range range;
};
/// merge equal changes with adjoining ranges
void merge();
typedef std::vector<ChangeRange> ChangeTable;
/// table of changes, every row a change and range descriptor
ChangeTable table_;
};
} // namespace lyx
#endif // CHANGES_H