sw/source/uibase/utlui/prcntfld.cxx

   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 #include <prcntfld.hxx>
  21 #include <vcl/fieldvalues.hxx>
  22
  23 SwPercentField::SwPercentField(std::unique_ptr<weld::MetricSpinButton> pControl)
  24     : m_pField(std::move(pControl))
  25     , m_nOldMax(0)
  26     , m_nOldMin(0)
  27     , m_nLastPercent(-1)
  28     , m_nLastValue(-1)
  29     , m_nOldDigits(m_pField->get_digits())
  30     , m_eOldUnit(FieldUnit::NONE)
  31     , m_bLockAutoCalculation(false)
  32 {
  33     sal_Int64 nMin, nMax;
  34     m_pField->get_range(nMin, nMax, FieldUnit::TWIP);
  35     m_nRefValue = DenormalizePercent(nMax);
  36     m_pField->get_increments(m_nOldSpinSize, m_nOldPageSize, FieldUnit::NONE);
  37 }
  38
  39 void SwPercentField::SetRefValue(sal_Int64 nValue)
  40 {
  41     sal_Int64 nRealValue = GetRealValue(m_eOldUnit);
  42
  43     m_nRefValue = nValue;
  44
  45     if (!m_bLockAutoCalculation && (m_pField->get_unit() == FieldUnit::PERCENT))
  46         set_value(nRealValue, m_eOldUnit);
  47 }
  48
  49 static sal_Int64 UpscaleTwoDecimalPlaces(sal_Int64 nCurrentWidth, int nOldDigits)
  50 {
  51     // tdf#145847 Typically nOldDigits is two so deriving percentage is direct division
  52     // by m_nRefValue but it is one for points
  53     for (int i = nOldDigits; i < 2; ++i)
  54         nCurrentWidth *= 10;
  55     return nCurrentWidth;
  56 }
  57
  58 void SwPercentField::ShowPercent(bool bPercent)
  59 {
  60     if ((bPercent && m_pField->get_unit() == FieldUnit::PERCENT)
  61         || (!bPercent && m_pField->get_unit() != FieldUnit::PERCENT))
  62         return;
  63
  64     sal_Int64 nOldValue;
  65
  66     if (bPercent)
  67     {
  68         nOldValue = get_value();
  69
  70         m_eOldUnit = m_pField->get_unit();
  71         m_nOldDigits = m_pField->get_digits();
  72         m_pField->get_range(m_nOldMin, m_nOldMax, FieldUnit::NONE);
  73         m_pField->get_increments(m_nOldSpinSize, m_nOldPageSize, FieldUnit::NONE);
  74         m_pField->set_unit(FieldUnit::PERCENT);
  75         m_pField->set_digits(0);
  76
  77         sal_Int64 nCurrentWidth
  78             = vcl::ConvertValue(m_nOldMin, 0, m_nOldDigits, m_eOldUnit, FieldUnit::TWIP);
  79         nCurrentWidth = UpscaleTwoDecimalPlaces(nCurrentWidth, m_nOldDigits);
  80
  81         // round to 0.5 percent
  82         int nPercent = m_nRefValue ? (((nCurrentWidth * 10) / m_nRefValue + 5) / 10) : 0;
  83
  84         m_pField->set_range(std::max(1, nPercent), 100, FieldUnit::NONE);
  85         m_pField->set_increments(5, 10, FieldUnit::NONE);
  86         if (nOldValue != m_nLastValue)
  87         {
  88             nCurrentWidth
  89                 = vcl::ConvertValue(nOldValue, 0, m_nOldDigits, m_eOldUnit, FieldUnit::TWIP);
  90             nCurrentWidth = UpscaleTwoDecimalPlaces(nCurrentWidth, m_nOldDigits);
  91             nPercent = m_nRefValue ? (((nCurrentWidth * 10) / m_nRefValue + 5) / 10) : 0;
  92             m_pField->set_value(nPercent, FieldUnit::NONE);
  93             m_nLastPercent = nPercent;
  94             m_nLastValue = nOldValue;
  95         }
  96         else
  97             m_pField->set_value(m_nLastPercent, FieldUnit::NONE);
  98     }
  99     else
 100     {
 101         sal_Int64 nOldPercent = get_value(FieldUnit::PERCENT);
 102
 103         nOldValue = Convert(get_value(), m_pField->get_unit(), m_eOldUnit);
 104
 105         m_pField->set_unit(m_eOldUnit);
 106         m_pField->set_digits(m_nOldDigits);
 107         m_pField->set_range(m_nOldMin, m_nOldMax, FieldUnit::NONE);
 108         m_pField->set_increments(m_nOldSpinSize, m_nOldPageSize, FieldUnit::NONE);
 109
 110         if (nOldPercent != m_nLastPercent)
 111         {
 112             set_value(nOldValue, m_eOldUnit);
 113             m_nLastPercent = nOldPercent;
 114             m_nLastValue = nOldValue;
 115         }
 116         else
 117             set_value(m_nLastValue, m_eOldUnit);
 118     }
 119 }
 120
 121 void SwPercentField::set_value(sal_Int64 nNewValue, FieldUnit eInUnit)
 122 {
 123     if (m_pField->get_unit() != FieldUnit::PERCENT || eInUnit == FieldUnit::PERCENT)
 124         m_pField->set_value(Convert(nNewValue, eInUnit, m_pField->get_unit()), FieldUnit::NONE);
 125     else
 126     {
 127         // Overwrite output value, do not restore later
 128         sal_Int64 nPercent, nCurrentWidth;
 129         if (eInUnit == FieldUnit::TWIP)
 130         {
 131             nCurrentWidth
 132                 = vcl::ConvertValue(nNewValue, 0, m_nOldDigits, FieldUnit::TWIP, FieldUnit::TWIP);
 133         }
 134         else
 135         {
 136             sal_Int64 nValue = Convert(nNewValue, eInUnit, m_eOldUnit);
 137             nCurrentWidth = vcl::ConvertValue(nValue, 0, m_nOldDigits, m_eOldUnit, FieldUnit::TWIP);
 138         }
 139         nCurrentWidth = UpscaleTwoDecimalPlaces(nCurrentWidth, m_nOldDigits);
 140         nPercent = m_nRefValue ? (((nCurrentWidth * 10) / m_nRefValue + 5) / 10) : 0;
 141         m_pField->set_value(nPercent, FieldUnit::NONE);
 142     }
 143 }
 144
 145 sal_Int64 SwPercentField::get_value(FieldUnit eOutUnit)
 146 {
 147     return Convert(m_pField->get_value(FieldUnit::NONE), m_pField->get_unit(), eOutUnit);
 148 }
 149
 150 void SwPercentField::set_min(sal_Int64 nNewMin, FieldUnit eInUnit)
 151 {
 152     if (m_pField->get_unit() != FieldUnit::PERCENT)
 153         m_pField->set_min(nNewMin, eInUnit);
 154     else
 155     {
 156         if (eInUnit == FieldUnit::NONE)
 157             eInUnit = m_eOldUnit;
 158         m_nOldMin = Convert(nNewMin, eInUnit, m_eOldUnit);
 159
 160         int nPercent = Convert(nNewMin, eInUnit, FieldUnit::PERCENT);
 161         m_pField->set_min(std::max(1, nPercent), FieldUnit::NONE);
 162     }
 163 }
 164
 165 void SwPercentField::set_max(sal_Int64 nNewMax, FieldUnit eInUnit)
 166 {
 167     if (m_pField->get_unit() != FieldUnit::PERCENT)
 168         m_pField->set_max(nNewMax, eInUnit);
 169 }
 170
 171 sal_Int64 SwPercentField::NormalizePercent(sal_Int64 nValue)
 172 {
 173     if (m_pField->get_unit() != FieldUnit::PERCENT)
 174         nValue = m_pField->normalize(nValue);
 175     else
 176         nValue = nValue * ImpPower10(m_nOldDigits);
 177     return nValue;
 178 }
 179
 180 sal_Int64 SwPercentField::DenormalizePercent(sal_Int64 nValue)
 181 {
 182     if (m_pField->get_unit() != FieldUnit::PERCENT)
 183         nValue = m_pField->denormalize(nValue);
 184     else
 185     {
 186         int nFactor = ImpPower10(m_nOldDigits);
 187         nValue = ((nValue + (nFactor / 2)) / nFactor);
 188     }
 189     return nValue;
 190 }
 191
 192 int SwPercentField::ImpPower10(sal_uInt16 n)
 193 {
 194     int nValue = 1;
 195
 196     for (sal_uInt16 i = 0; i < n; ++i)
 197         nValue *= 10;
 198
 199     return nValue;
 200 }
 201
 202 sal_Int64 SwPercentField::GetRealValue(FieldUnit eOutUnit)
 203 {
 204     if (m_pField->get_unit() != FieldUnit::PERCENT)
 205         return get_value(eOutUnit);
 206     else
 207         return Convert(get_value(), m_pField->get_unit(), eOutUnit);
 208 }
 209
 210 sal_Int64 SwPercentField::Convert(sal_Int64 nValue, FieldUnit eInUnit, FieldUnit eOutUnit)
 211 {
 212     if (eInUnit == eOutUnit || (eInUnit == FieldUnit::NONE && eOutUnit == m_pField->get_unit())
 213         || (eOutUnit == FieldUnit::NONE && eInUnit == m_pField->get_unit()))
 214         return nValue;
 215
 216     if (eInUnit == FieldUnit::PERCENT)
 217     {
 218         // Convert to metric
 219         sal_Int64 nTwipValue = (m_nRefValue * nValue + 50) / 100;
 220
 221         if (eOutUnit == FieldUnit::TWIP) // Only convert if necessary
 222             return NormalizePercent(nTwipValue);
 223         else
 224             return vcl::ConvertValue(NormalizePercent(nTwipValue), 0, m_nOldDigits, FieldUnit::TWIP,
 225                                      eOutUnit);
 226     }
 227
 228     if (eOutUnit == FieldUnit::PERCENT)
 229     {
 230         // Convert to percent
 231         sal_Int64 nCurrentWidth;
 232         nValue = DenormalizePercent(nValue);
 233
 234         if (eInUnit == FieldUnit::TWIP) // Only convert if necessary
 235             nCurrentWidth = nValue;
 236         else
 237             nCurrentWidth = vcl::ConvertValue(nValue, 0, m_nOldDigits, eInUnit, FieldUnit::TWIP);
 238         nCurrentWidth = UpscaleTwoDecimalPlaces(nCurrentWidth, m_nOldDigits);
 239         // Round to 0.5 percent
 240         return m_nRefValue ? (((nCurrentWidth * 1000) / m_nRefValue + 5) / 10) : 0;
 241     }
 242
 243     return vcl::ConvertValue(nValue, 0, m_nOldDigits, eInUnit, eOutUnit);
 244 }
 245 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */