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0705dae8a3
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@7703 a592a061-630c-0410-9148-cb99ea01b6c8
154 lines
3.6 KiB
C++
154 lines
3.6 KiB
C++
// -*- C++ -*-
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/**
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* \file changes.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author John Levon
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*
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* Full author contact details are available in file CREDITS.
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*
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* Record changes in a paragraph.
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*/
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#ifndef CHANGES_H
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#define CHANGES_H
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#include "support/types.h"
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#include "support/lyxtime.h"
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#include <vector>
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#include <iosfwd>
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struct Change {
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/// the type of change
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enum Type {
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UNCHANGED, // no change
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INSERTED, // new text
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DELETED // deleted text
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};
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Change(Type t = UNCHANGED, int a = 0, lyx::time_type ct = 0)
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: type(t), author(a), changetime(ct) {}
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Type type;
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int author;
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lyx::time_type changetime;
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};
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bool operator==(Change const & l, Change const & r);
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bool operator!=(Change const & l, Change const & r);
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class Changes {
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public:
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Changes(Change::Type type);
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~Changes();
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Changes(Changes const &);
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/// reset "default" change type (for empty pars)
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void reset(Change::Type type) {
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empty_type_ = type;
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}
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/// set the position to the given change
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void set(Change change, lyx::pos_type pos);
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/// set the position to the given change
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void set(Change::Type, lyx::pos_type pos);
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/// set the range to the given change
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void set(Change::Type, lyx::pos_type start, lyx::pos_type end);
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/// set the range to the given change
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void set(Change, lyx::pos_type start, lyx::pos_type end);
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/// mark the given change and adjust
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void record(Change, lyx::pos_type pos);
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/// return the change type at the given position
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Change::Type lookup(lyx::pos_type pos) const;
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/// return the change at the given position
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Change const lookupFull(lyx::pos_type pos) const;
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/// return true if there is a change in the given range
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bool isChange(lyx::pos_type start, lyx::pos_type end) const;
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/// return true if there is a deleted or unchanged range contained
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bool isChangeEdited(lyx::pos_type start, lyx::pos_type end) const;
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/// remove the given entry
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void erase(lyx::pos_type pos);
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/// output latex to mark a transition between two changetypes
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/// returns length of text outputted
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static int latexMarkChange(std::ostream & os, Change::Type old, Change::Type change);
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/// output .lyx file format for transitions between changes
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static void lyxMarkChange(std::ostream & os, int & column,
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lyx::time_type curtime, Change const & old, Change const & change);
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private:
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struct Range {
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Range(lyx::pos_type s, lyx::pos_type e)
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: start(s), end(e) {}
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// does this range contain r ?
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bool contains(Range const & r) const;
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// does this range contain pos ?
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bool contains(lyx::pos_type pos) const;
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// does this range contain pos, or can it be appended ?
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bool loose_contains(lyx::pos_type pos) const;
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// is this range contained within r ?
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bool contained(Range const & r) const;
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// do the ranges intersect ?
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bool intersects(Range const & r) const;
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lyx::pos_type start;
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lyx::pos_type end;
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};
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friend bool operator==(Range const & r1, Range const & r2);
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friend bool operator!=(Range const & r1, Range const & r2);
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struct ChangeRange {
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ChangeRange(lyx::pos_type s, lyx::pos_type e, Change c)
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: range(Range(s, e)), change(c) {}
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Range range;
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Change change;
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};
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typedef std::vector<ChangeRange> ChangeTable;
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/// our table of changes
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ChangeTable table_;
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/// change type for an empty paragraph
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Change::Type empty_type_;
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/// handle a delete
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void del(Change change, ChangeTable::size_type pos);
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/// handle an add
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void add(Change change, ChangeTable::size_type pos);
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/// merge neighbouring ranges
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void merge();
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/// consistency check
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void check() const;
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};
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#endif // CHANGES_H
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