SvgGraphicDevice.cpp

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// SPDX-FileCopyrightText: The Bio++ Development Group
//
// SPDX-License-Identifier: CECILL-2.1

#include "SvgGraphicDevice.h"

using namespace bpp;
using namespace std;

void SvgGraphicDevice::begin()
{
  layers_.clear();
  minx_ = maxx_ = miny_ = maxy_ = 0;
}

void SvgGraphicDevice::end()
{
  // Header:
  out_ << "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>" << endl;
  out_ << "<!DOCTYPE svg PUBLIC \"-//W3C//DTD Svg 1.1//EN\"" << endl;
  out_ << "\"http://www.w3.org/Graphics/Svg/1.1/DTD/svg11.dtd\">" << endl;
  out_ << "<svg width=\"" << (maxx_ - minx_) << "\" height=\"" << (maxy_ - miny_) << "\" version=\"1.1\"" << endl;
  out_ << " xmlns=\"http://www.w3.org/2000/svg\"" << endl;
  if (inkscapeEnabled_)
    out_ << " xmlns:inkscape=\"http://www.inkscape.org/namespaces/inkscape\"";
  out_ << " >" << endl;

  out_ << "<g transform=\"translate(" << (-minx_) << "," << (-miny_) << ")\">" << endl;

  for (map<int, vector<string>>::iterator it = layers_.begin(); it != layers_.end(); it++)
  {
    out_ << "<g id=\"layer" << it->first << "\"";
    if (inkscapeEnabled_)
    {
      out_ << " inkscape:groupmode=\"layer\"";
    }
    out_ << " >" << endl;
    vector<string>* v = &it->second;
    for (unsigned int i = 0; i < v->size(); i++)
    {
      out_ << (*v)[i] << endl;
    }
    out_ << "</g>" << endl;
  }
  out_ << "</g>" << endl;

  out_ << "</svg>" << endl;
}

void SvgGraphicDevice::drawLine(double x1, double y1, double x2, double y2)
{
  x1 = x_(x1);
  x2 = x_(x2);
  y1 = y_(y1);
  y2 = y_(y2);
  string style = "stroke:" + colorToText(getCurrentForegroundColor()) + ";stroke-width:" + TextTools::toString(getCurrentPointSize());
  if (getCurrentLineType() == LINE_DASHED)
    style += ";stroke-dasharray:4,4";
  else if (getCurrentLineType() == LINE_DOTTED)
    style += ";stroke-dasharray:1,2";
  ostringstream oss;
  oss << "<line x1=\"" << x1 << "\" y1=\"" << y1 << "\" x2=\"" << x2 << "\" y2=\"" << y2 << "\" style=\"" << style << "\" />";
  layers_[getCurrentLayer()].push_back(oss.str());
  if (x1 < minx_)
    minx_ = x1;
  if (x2 < minx_)
    minx_ = x2;
  if (y1 < miny_)
    miny_ = y1;
  if (y2 < miny_)
    miny_ = y2;
  if (x1 > maxx_)
    maxx_ = x1;
  if (x2 > maxx_)
    maxx_ = x2;
  if (y1 > maxy_)
    maxy_ = y1;
  if (y2 > maxy_)
    maxy_ = y2;
}

void SvgGraphicDevice::drawRect(double x, double y, double width, double height, short fill)
{
  x = x_(x);
  y = y_(y);
  width = x_(width);
  height = y_(height);
  string style = "stroke:" + colorToText(getCurrentForegroundColor()) + ";stroke-width:" + TextTools::toString(getCurrentPointSize());
  if (fill == FILL_FILLED)
  {
    style += ";fill:" + colorToText(getCurrentBackgroundColor());
  }
  ostringstream oss;
  oss << "<rect x=\"" << x << "\" y=\"" << y << "\" width=\"" << width << "\" height=\"" << height << "\" style=\"" << style << "\" />";
  layers_[getCurrentLayer()].push_back(oss.str());
  if (x < minx_)
    minx_ = x;
  if (y < miny_)
    miny_ = y;
  if (x + width > maxx_)
    maxx_ = x + width;
  if (y + height > maxy_)
    maxx_ = y + height;
}

void SvgGraphicDevice::drawCircle(double x, double y, double radius, short fill)
{
  x = x_(x);
  y = y_(y);
  radius = x_(radius);
  string style = "stroke:" + colorToText(getCurrentForegroundColor()) + ";stroke-width:" + TextTools::toString(getCurrentPointSize());
  if (fill == FILL_FILLED)
  {
    style += ";fill:" + colorToText(getCurrentBackgroundColor());
  }
  ostringstream oss;
  oss << "<rect cx=\"" << x << "\" cy=\"" << y << "\" cr=\"" << radius << "\" style=\"" << style << "\" />";
  layers_[getCurrentLayer()].push_back(oss.str());
}

void SvgGraphicDevice::drawText(double x, double y, const std::string& text, short hpos, short vpos, double angle)
{
  x = x_(x);
  y = y_(y);
  string style = "font-family:" + getCurrentFont().getFamily() + ";font-style:" + fontStyles_[getCurrentFont().getStyle()] + ";font-weight:" + fontWeights_[getCurrentFont().getWeight()] + ";font-size:" + TextTools::toString(getCurrentFont().getSize()) + "px";
  style += ";dominant-baseline:";
  if (vpos == TEXT_VERTICAL_BOTTOM)
    style += "before-edge";
  else if (vpos == TEXT_VERTICAL_TOP)
    style += "after-edge";
  else if (vpos == TEXT_VERTICAL_CENTER)
    style += "middle";
  else
    throw UnvalidFlagException("SvgGraphicDevice::drawText. Invalid vertical alignment option.");
  style += ";text-anchor:";
  if (hpos == TEXT_HORIZONTAL_LEFT)
    style += "start";
  else if (hpos == TEXT_HORIZONTAL_RIGHT)
    style += "end";
  else if (hpos == TEXT_HORIZONTAL_CENTER)
    style += "middle";
  else
    throw UnvalidFlagException("SvgGraphicDevice::drawText. Invalid horizontal alignment option.");
  style += ";fill:" + colorToText(getCurrentForegroundColor());

  ostringstream oss;
  oss << "<text x=\"" << x << "\" y=\"" << y << "\" rotate=\"" << angle << "\" style=\"" << style << "\" >" << text << "</text>";
  layers_[getCurrentLayer()].push_back(oss.str());
}