svgio/inc/SvgNumber.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #pragma once
  21
  22 #include <basegfx/range/b2drange.hxx>
  23 #include <vector>
  24
  25 namespace svgio::svgreader
  26 {
  27
  28 enum class NumberType
  29 {
  30     xcoordinate,
  31     ycoordinate,
  32     length
  33 };
  34
  35 class InfoProvider
  36 {
  37 public:
  38     virtual ~InfoProvider() {}
  39     virtual basegfx::B2DRange getCurrentViewPort() const = 0;
  40     /// return font size of node inherited from parents
  41     virtual double getCurrentFontSizeInherited() const = 0;
  42     /// return xheight of node inherited from parents
  43     virtual double getCurrentXHeightInherited() const = 0;
  44 };
  45
  46 enum class SvgUnit
  47 {
  48     em = 0,    // relative to current font size
  49     ex,        // relative to current x-height
  50
  51     px,        // 'user unit'
  52     pt,        // points, 1/72 in
  53     pc,        // 1/6 in
  54     cm,
  55     mm,
  56     in,
  57
  58     percent,   // relative to range
  59     none       // for stroke-miterlimit, which has no unit
  60 };
  61
  62 class SvgNumber
  63 {
  64 private:
  65     double      mfNumber;
  66     SvgUnit     meUnit;
  67
  68     bool        mbSet : 1;
  69
  70 public:
  71     SvgNumber()
  72     :   mfNumber(0.0),
  73         meUnit(SvgUnit::px),
  74         mbSet(false)
  75     {
  76     }
  77
  78     SvgNumber(double fNum, SvgUnit aSvgUnit = SvgUnit::px, bool bSet = true)
  79     :   mfNumber(fNum),
  80         meUnit(aSvgUnit),
  81         mbSet(bSet)
  82     {
  83     }
  84
  85     double getNumber() const
  86     {
  87         return mfNumber;
  88     }
  89
  90     SvgUnit getUnit() const
  91     {
  92         return meUnit;
  93     }
  94
  95     bool isSet() const
  96     {
  97         return mbSet;
  98     }
  99
 100     bool isPositive() const
 101     {
 102         return basegfx::fTools::moreOrEqual(mfNumber, 0.0);
 103     }
 104
 105     // Only usable in cases, when the unit is not SvgUnit::percent, otherwise use method solve
 106     double solveNonPercentage(const InfoProvider& rInfoProvider) const;
 107
 108     double solve(const InfoProvider& rInfoProvider, NumberType aNumberType = NumberType::length) const;
 109 };
 110
 111 typedef std::vector<SvgNumber> SvgNumberVector;
 112
 113 } // end of namespace svgio::svgreader
 114
 115 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */