starmath/inc/utility.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 <sal/config.h>
  23
  24 #include <sal/log.hxx>
  25 #include <vcl/font.hxx>
  26 #include <vcl/weld.hxx>
  27 #include <tools/fract.hxx>
  28 #include <deque>
  29
  30 inline tools::Long SmPtsTo100th_mm(tools::Long nNumPts)
  31     // returns the length (in 100th of mm) that corresponds to the length
  32     // 'nNumPts' (in units points).
  33     // 72.27 [pt] = 1 [inch] = 2,54 [cm] = 2540 [100th of mm].
  34     // result is being rounded to the nearest integer.
  35 {
  36     SAL_WARN_IF( nNumPts < 0, "starmath", "Ooops..." );
  37     // broken into multiple and fraction of 'nNumPts' to reduce chance
  38     // of overflow
  39     // (7227 / 2) is added in order to round to the nearest integer
  40     return 35 * nNumPts + (nNumPts * 1055L + (7227 / 2)) / 7227L;
  41 }
  42
  43
  44 inline Fraction Sm100th_mmToPts(tools::Long nNum100th_mm)
  45     // returns the length (in points) that corresponds to the length
  46     // 'nNum100th_mm' (in 100th of mm).
  47 {
  48     SAL_WARN_IF( nNum100th_mm < 0, "starmath", "Ooops..." );
  49     return Fraction(7227L, 254000L) * Fraction(nNum100th_mm);
  50 }
  51
  52
  53 inline tools::Long SmRoundFraction(const Fraction &rFrac)
  54 {
  55     SAL_WARN_IF( rFrac <= Fraction(), "starmath", "Ooops..." );
  56     return (rFrac.GetNumerator() + rFrac.GetDenominator() / 2) / rFrac.GetDenominator();
  57 }
  58
  59
  60 class SmViewShell;
  61 SmViewShell * SmGetActiveView();
  62
  63
  64 // SmFace
  65
  66
  67 bool    IsItalic( const vcl::Font &rFont );
  68 bool    IsBold( const vcl::Font &rFont );
  69
  70 class SmFace final : public vcl::Font
  71 {
  72     tools::Long    nBorderWidth;
  73
  74     void    Impl_Init();
  75
  76 public:
  77     SmFace() :
  78         Font(), nBorderWidth(-1) { Impl_Init(); }
  79     SmFace(const Font& rFont) :
  80         Font(rFont), nBorderWidth(-1) { Impl_Init(); }
  81     SmFace(const OUString& rName, const Size& rSize) :
  82         Font(rName, rSize), nBorderWidth(-1) { Impl_Init(); }
  83
  84     SmFace(const SmFace &rFace) :
  85         Font(rFace), nBorderWidth(-1) { Impl_Init(); }
  86
  87     // overloaded version in order to supply a min value
  88     // for font size (height). (Also used in ctor's to do so.)
  89     void    SetSize(const Size& rSize);
  90
  91     void    SetBorderWidth(tools::Long nWidth)     { nBorderWidth = nWidth; }
  92     tools::Long    GetBorderWidth() const;
  93     tools::Long    GetDefaultBorderWidth() const   { return GetFontSize().Height() / 20 ; }
  94     void    FreezeBorderWidth()     { nBorderWidth = GetDefaultBorderWidth(); }
  95
  96     SmFace & operator = (const SmFace &rFace);
  97 };
  98
  99 SmFace & operator *= (SmFace &rFace, const Fraction &rFrac);
 100
 101
 102 // SmFontPickList
 103
 104
 105 class SmFontDialog;
 106
 107 class SmFontPickList
 108 {
 109 protected:
 110     sal_uInt16 nMaxItems;
 111     std::deque<vcl::Font> aFontVec;
 112
 113 public:
 114     explicit SmFontPickList(sal_uInt16 nMax = 5) : nMaxItems(nMax) {}
 115     virtual ~SmFontPickList() { Clear(); }
 116
 117     virtual void    Insert(const vcl::Font &rFont);
 118
 119     void            Clear();
 120     vcl::Font       Get(sal_uInt16 nPos = 0) const;
 121
 122     SmFontPickList& operator = (const SmFontPickList& rList);
 123
 124     void            ReadFrom(const SmFontDialog& rDialog);
 125     void            WriteTo(SmFontDialog& rDialog) const;
 126 };
 127
 128
 129 //  SmFontPickListBox
 130
 131
 132 class SmFontPickListBox final : public SmFontPickList
 133 {
 134 private:
 135     std::unique_ptr<weld::ComboBox> m_xWidget;
 136
 137     DECL_LINK(SelectHdl, weld::ComboBox&, void);
 138
 139 public:
 140     SmFontPickListBox(std::unique_ptr<weld::ComboBox> pWidget);
 141     SmFontPickListBox& operator = (const SmFontPickList& rList);
 142     virtual void    Insert(const vcl::Font &rFont) override;
 143 };
 144
 145 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */