src/hline.cpp

   1 /*
   2   Copyright (c) 2006 Paolo Capriotti <p.capriotti@gmail.com>
   3             (c) 2006 Maurizio Monge <maurizio.monge@kdemail.net>
   4
   5   This program 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
  11 #include "hline.h"
  12
  13 #include "common.h"
  14 #include <iostream>
  15
  16 class TrivialExecutor : public HLineExecutor {
  17 public:
  18   virtual ~TrivialExecutor() {
  19     std::cout << std::endl;
  20   }
  21
  22   virtual void writeChunk(const QString& text) {
  23     std::cout << text << "|";
  24   }
  25
  26   virtual void setFormat(const QTextCharFormat&) { }
  27 };
  28
  29 void HLine::Format::applyTo(QTextCharFormat& fmt) const {
  30   if (m_bold.first) {
  31     fmt.setFontWeight(m_bold.second ? QFont::Bold : QFont::Normal);
  32   }
  33   if (m_italic.first) {
  34     fmt.setFontItalic(m_italic.second);
  35   }
  36   if (m_color.first)
  37     fmt.setForeground(m_color.second);
  38 }
  39
  40 HLine::HLine(const QString& text, const QTextCharFormat& baseFormat)
  41 : m_text(text) {
  42   m_regions.push_back(Region(text.length(), baseFormat));
  43 }
  44
  45 HLine::HLine(const HLine& other)
  46 : m_regions(other.m_regions)
  47 , m_text(other.m_text) { }
  48
  49 uint HLine::findRegion(int index) const {
  50   if (index >= m_text.length()) return m_regions.size();
  51   uint r = 0;
  52   while (index >= m_regions[r].end())
  53     r++;
  54   Q_ASSERT(r < m_regions.size());
  55   return r;
  56 }
  57
  58 int HLine::begin(uint r) const {
  59   if (r == 0) return 0;
  60   else return m_regions[r - 1].end();
  61 }
  62
  63 uint HLine::splitRegion(int index) {
  64   if (index >= m_text.length()) return m_regions.size();
  65   int r = findRegion(index);
  66   if (begin(r) != index) {
  67     m_regions.insert(
  68       m_regions.begin() + r + 1,
  69       m_regions[r]);
  70     m_regions[r].setEnd(index);
  71     return r + 1;
  72   }
  73   else return r;
  74 }
  75
  76 const QTextCharFormat& HLine::getFormat(int index) const {
  77   return m_regions[findRegion(index)].format();
  78 }
  79
  80 void HLine::setFormat(int begin, int end, const Format& format) {
  81   Q_ASSERT(begin < m_text.length());
  82   Q_ASSERT(end <= m_text.length());
  83
  84   if (begin >= end) return;
  85   int r1 = splitRegion(begin);
  86   int r2 = splitRegion(end);
  87
  88   for (int r = r1; r < r2; r++) {
  89     QTextCharFormat fmt = m_regions[r].format();
  90     format.applyTo(fmt);
  91     m_regions[r].setFormat(fmt);
  92   }
  93 }
  94
  95 void HLine::setBold(int begin, int end, bool value) {
  96   Format format;
  97   format.m_bold = std::make_pair(true, value);
  98   setFormat(begin, end, format);
  99 }
 100
 101 void HLine::setItalic(int begin, int end, bool value) {
 102   Format format;
 103   format.m_italic = std::make_pair(true, value);
 104   setFormat(begin, end, format);
 105 }
 106
 107 void HLine::setColor(int begin, int end, const QColor& color) {
 108   Format format;
 109   format.m_color = std::make_pair(true, color);
 110   setFormat(begin, end, format);
 111 }
 112
 113 QString HLine::mid(int begin, int end) const {
 114   return m_text.mid(begin, end - begin);
 115 }
 116
 117 HLine* HLine::extract(int begin, int end) const {
 118   HLine* res = new HLine(*this);
 119   int r1 = res->splitRegion(begin);
 120   int r2 = res->splitRegion(end);
 121
 122   // adjust text
 123   res->m_text = mid(begin, end);
 124
 125   // remove superfluous regions
 126   res->m_regions.erase(
 127     res->m_regions.begin() + r2,
 128     res->m_regions.end());
 129   res->m_regions.erase(
 130     res->m_regions.begin(),
 131     res->m_regions.begin() + r1);
 132
 133   // adjust regions
 134   for (uint i = 0; i < res->m_regions.size(); i++) {
 135     res->m_regions[i].setEnd(res->m_regions[i].end() - begin);
 136   }
 137
 138   return res;
 139 }
 140
 141 HLine* HLine::append(const HLine& other, int begin, int end) const {
 142   HLine* res = new HLine(*this);
 143
 144   int old_r = res->m_regions.size();
 145   int old_length = res->m_text.length();
 146
 147   // append text
 148   res->m_text += other.mid(begin, end);
 149
 150   // add regions
 151   int r1 = other.findRegion(begin);
 152   int r2 = other.findRegion(end);
 153   std::copy(other.m_regions.begin() + r1,
 154        other.m_regions.begin() + r2,
 155        std::back_insert_iterator<std::vector<Region> >(res->m_regions));
 156
 157   // adjust regions
 158   for (uint i = old_r; i < res->m_regions.size(); i++) {
 159     int new_end = old_length + res->m_regions[i].end() - begin;
 160     res->m_regions[i].setEnd(new_end);
 161   }
 162
 163   return res;
 164 }
 165
 166 void HLine::dump() const {
 167   TrivialExecutor executor;
 168   run(executor);
 169 }
 170
 171 void HLine::run(HLineExecutor& executor) const {
 172   int begin = 0;
 173   for (uint i = 0; i < m_regions.size(); i++) {
 174     int end = m_regions[i].end();
 175     executor.setFormat(m_regions[i].format());
 176     executor.writeChunk(mid(begin, end));
 177     begin = end;
 178   }
 179 }
 180