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Viewing changes to inkscape-0.47pre1/src/libvpsc/constraint.h

  • Committer: Bazaar Package Importer
  • Author(s): Bryce Harrington
  • Date: 2009-07-02 17:09:45 UTC
  • mfrom: (1.1.9 upstream)
  • Revision ID: james.westby@ubuntu.com-20090702170945-nn6d6zswovbwju1t
Tags: 0.47~pre1-0ubuntu1
https://launchpad.net/bugs/348842
https://launchpad.net/bugs/391149
* New upstream release.
  - Don't constrain maximization on small resolution devices (pre0)
    (LP: #348842)
  - Fixes segfault on startup (pre0)
    (LP: #391149)

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inkscape-0.47pre1/src/libvpsc/constraint.h
 
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/**
 
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 * \brief A constraint determines a minimum or exact spacing required between
 
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 * two variables.
 
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 *
 
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 * Authors:
 
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 *   Tim Dwyer <tgdwyer@gmail.com>
 
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 *
 
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 * Copyright (C) 2005 Authors
 
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 *
 
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 * Released under GNU LGPL.  Read the file 'COPYING' for more information.
 
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 */
 
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#ifndef SEEN_REMOVEOVERLAP_CONSTRAINT_H
 
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#define SEEN_REMOVEOVERLAP_CONSTRAINT_H
 
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#include <iostream>
 
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#include "variable.h"
 
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namespace vpsc {
 
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class Constraint
 
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{
 
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        friend std::ostream& operator <<(std::ostream &os,const Constraint &c);
 
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public:
 
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        Variable *left;
 
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        Variable *right;
 
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        double gap;
 
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        double lm;
 
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        Constraint(Variable *left, Variable *right, double gap, bool equality=false);
 
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    virtual ~Constraint();
 
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        inline double slack() const { return right->position() - gap - left->position(); }
 
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        long timeStamp;
 
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        bool active;
 
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        bool visited;
 
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        bool equality;
 
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};
 
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#include <float.h>
 
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#include "block.h"
 
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static inline bool compareConstraints(Constraint *const &l, Constraint *const &r) {
 
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        double const sl = 
 
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                l->left->block->timeStamp > l->timeStamp
 
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                ||l->left->block==l->right->block
 
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                ?-DBL_MAX:l->slack();
 
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        double const sr = 
 
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                r->left->block->timeStamp > r->timeStamp
 
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                ||r->left->block==r->right->block
 
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                ?-DBL_MAX:r->slack();
 
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        if(sl==sr) {
 
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                // arbitrary choice based on id
 
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                if(l->left->id==r->left->id) {
 
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                        if(l->right->id<r->right->id) return true;
 
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                        return false;
 
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                }
 
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                if(l->left->id<r->left->id) return true;
 
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                return false;
 
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        }
 
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        return sl < sr;
 
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}
 
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}
 
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#endif // SEEN_REMOVEOVERLAP_CONSTRAINT_H