kworship/css/KwCssStyles.cpp

   1 /***************************************************************************
   2  *   This file is part of KWorship.                                        *
   3  *   Copyright 2008 James Hogan <james@albanarts.com>                      *
   4  *                                                                         *
   5  *   KWorship is free software: you can redistribute it and/or modify      *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation, either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   KWorship is distributed in the hope that it will be useful,           *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with KWorship.  If not, write to the Free Software Foundation,  *
  17  *   Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.   *
  18  ***************************************************************************/
  19
  20 /**
  21  * @file KwCssStyles.cpp
  22  * @brief Set of cascading style properties.
  23  * @author James Hogan <james@albanarts.com>
  24  */
  25
  26 #include "KwCssStyles.h"
  27 #include "KwCssStyleStates.h"
  28 #include "KwCssAbstractStyle.h"
  29 #include "KwCssAbstractStyleState.h"
  30 #include "KwCssSchema.h"
  31
  32 #include <QRegExp>
  33
  34 /*
  35  * Constructors + destructors
  36  */
  37
  38 /// Default constructor.
  39 KwCssStyles::KwCssStyles()
  40 : m_styles()
  41 {
  42 }
  43
  44 /// Copy constructor.
  45 KwCssStyles::KwCssStyles(const KwCssStyles& other)
  46 : m_styles()
  47 {
  48   StyleDictionary::const_iterator it;
  49   for (it = other.m_styles.begin(); it != other.m_styles.end(); ++it)
  50   {
  51     m_styles[it.key()] = (*it)->duplicate();
  52   }
  53 }
  54
  55 /// Destructor.
  56 KwCssStyles::~KwCssStyles()
  57 {
  58   StyleDictionary::iterator it;
  59   for (it = m_styles.begin(); it != m_styles.end(); ++it)
  60   {
  61     delete *it;
  62   }
  63 }
  64
  65 /*
  66  * Main interface
  67  */
  68
  69 /// Set a style.
  70 void KwCssStyles::setRawStyle(QString name, KwCssAbstractStyle* style)
  71 {
  72   // Delete previous value
  73   StyleDictionary::iterator it = m_styles.find(name);
  74   if (it != m_styles.end())
  75   {
  76     delete *it;
  77   }
  78   // Set new value
  79   m_styles[name] = style;
  80 }
  81
  82 /// Return whether the styles container is empty.
  83 bool KwCssStyles::isEmpty() const
  84 {
  85   return m_styles.isEmpty();
  86 }
  87
  88 /// Convert to CSS-like format.
  89 QString KwCssStyles::toString() const
  90 {
  91   static const QString tmplt = "%1 : %2;\n";
  92   QString result;
  93   StyleDictionary::const_iterator it;
  94   for (it = m_styles.constBegin(); it != m_styles.constEnd(); ++it)
  95   {
  96     result += tmplt.arg(it.key()).arg((*it)->toString());
  97   }
  98   return result;
  99 }
 100
 101 /// Import from CSS-like format into the sheet.
 102 int KwCssStyles::import(const KwCssSchema* schema, const QString& sheet, int start)
 103 {
 104   // Read the styles
 105   static QRegExp reStyle("^([\\w.]+)\\s*:\\s*(\\S[^;]*);\\s*");
 106   int last = start;
 107   while (-1 != (start = reStyle.indexIn(sheet, last, QRegExp::CaretAtOffset)))
 108   {
 109     last = start + reStyle.matchedLength();
 110     QString name = reStyle.cap(1);
 111     KwCssUnprocessed value = reStyle.cap(2);
 112     setRawStyle(name, schema->construct(name, value));
 113   }
 114   return last;
 115 }
 116
 117 /*
 118  * Operators
 119  */
 120
 121 /// Apply styles.
 122 KwCssStyleStates& operator << (KwCssStyleStates& states, const KwCssStyles& styles)
 123 {
 124   // go through styles, adjusting the states
 125   KwCssStyles::StyleDictionary::const_iterator it;
 126   for (it = styles.m_styles.begin(); it != styles.m_styles.end(); ++it)
 127   {
 128     KwCssAbstractStyleState*& state = states[it.key()];
 129     if (0 == state)
 130     {
 131       state = (*it)->getNewState();
 132     }
 133     (*state) << (*it);
 134   }
 135   return states;
 136 }
 137