Class: WirisPlugin::TextFilter

Inherits:
Object
  • Object
show all
Includes:
Wiris
Defined in:
lib/com/wiris/plugin/impl/TextFilter.rb

Constant Summary collapse

NBSP = 
Std::fromCharCode(160)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(plugin) ⇒ TextFilter 



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 14

def initialize(plugin)
  super()
  @plugin = plugin
  @render = plugin::newRender()
  @service = plugin::newTextService()
  @fixUrl = nil
end

Instance Attribute Details

#fixUrl ⇒ Object

Returns the value of attribute fixUrl.



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 12

def fixUrl
  @fixUrl
end

#plugin ⇒ Object

Returns the value of attribute plugin.



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 9

def plugin
  @plugin
end

#render ⇒ Object

Returns the value of attribute render.



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 10

def render
  @render
end

#service ⇒ Object

Returns the value of attribute service.



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 11

def service
  @service
end

Instance Method Details

#filter(str, prop) ⇒ Object 



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 21

def filter(str,prop)
  saveMode = nil
  if prop!=nil
    saveMode = PropertiesTools::getProperty(prop,"savemode")
  end
  if saveMode==nil
    saveMode = @plugin::getConfiguration()::getProperty(ConfigurationKeys::SAVE_MODE,"xml")
  end
  b = (saveMode=="safeXml")
  if b
    tags = TextFilterTags::newSafeXml()
  else 
    tags = TextFilterTags::newXml()
  end
  str = filterMath(tags,str,prop,b)
  str = filterApplet(tags,str,prop,b)
  return str
end

#filterApplet(tags, text, prop, safeXML) ⇒ Object 



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 89

def filterApplet(tags,text,prop,safeXML)
  output = StringBuf.new()
  n0 = 0
  n1 = text::toUpperCase()::indexOf(tags::in_appletopen,n0)
  while n1>=0
    output::add(Std::substr(text,n0,n1-n0))
    n0 = n1
    n1 = text::toUpperCase()::indexOf(tags::in_appletclose,n0)
    if n1>=0
      n1 = n1+tags::in_appletclose::length()
      sub = Std::substr(text,n0,n1-n0)
      if safeXML
        if @fixUrl==nil
          @fixUrl = EReg.new("<a href=\"[^\"]*\"[^>]*>([^<]*)<\\/a>|<a href=\"[^\"]*\">","")
        end
        sub = @fixUrl::replace(sub,"$1")
        sub = html_entity_decode(sub)
        sub = StringTools::replace(sub,tags::in_double_quote,tags::out_double_quote)
        sub = StringTools::replace(sub,tags::in_open,tags::out_open)
        sub = StringTools::replace(sub,tags::in_close,tags::out_close)
        sub = StringTools::replace(sub,tags::in_entity,tags::out_entity)
        sub = StringTools::replace(sub,tags::in_quote,tags::out_quote)
      end
      n0 = n1
      output::add(sub)
      n1 = text::toUpperCase()::indexOf(tags::in_appletopen,n0)
    end
  end
  output::add(Std::substr(text,n0))
  return output::toString()
end

#filterMath(tags, text, prop, safeXML) ⇒ Object 



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 39

def filterMath(tags,text,prop,safeXML)
  output = StringBuf.new()
  n0 = 0
  n1 = text::indexOf(tags::in_mathopen,n0)
  tag = @plugin::getConfiguration()::getProperty(ConfigurationKeys::EDITOR_MATHML_ATTRIBUTE,"data-mathml")
  dataMathml = text::indexOf(tag,0)
  while n1>=0
    m0 = n0
    output::add(Std::substr(text,n0,n1-n0))
    n0 = n1
    n1 = text::indexOf(tags::in_mathclose,n0)
    if n1>=0
      n1 = n1+tags::in_mathclose::length()
      sub = Std::substr(text,n0,n1-n0)
      if safeXML
        if dataMathml!=-1
          m1 = text::indexOf("/>",n1)
          if (m1>=0)&&((text::indexOf("<img",n1)==-1)||(text::indexOf("<img",n1)>m1))
            m0 = Std::substr(text,m0,n0-m0)::lastIndexOf("<img")
            if m0>=0
              if (text::indexOf(tag,m0)>0)&&(text::indexOf(tag,m0)<n1)
                n0 = n1
                output::add(sub)
                n1 = text::indexOf(tags::in_mathopen,n0)
                m0 = m1
                  next
              end
            end
          end
        end
        if @fixUrl==nil
          @fixUrl = EReg.new("<a href=\"[^\"]*\"[^>]*>([^<]*)<\\/a>|<a href=\"[^\"]*\">","")
        end
        sub = @fixUrl::replace(sub,"$1")
        sub = html_entity_decode(sub)
        sub = StringTools::replace(sub,tags::in_double_quote,tags::out_double_quote)
        sub = StringTools::replace(sub,tags::in_open,tags::out_open)
        sub = StringTools::replace(sub,tags::in_close,tags::out_close)
        sub = StringTools::replace(sub,tags::in_entity,tags::out_entity)
        sub = StringTools::replace(sub,tags::in_quote,tags::out_quote)
      end
      sub = math2Img(sub,prop)
      n0 = n1
      output::add(sub)
      n1 = text::indexOf(tags::in_mathopen,n0)
    end
  end
  output::add(Std::substr(text,n0))
  return output::toString()
end

#html_entity_decode(str) ⇒ Object 



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 186

def html_entity_decode(str)
  str = StringTools::replace(str,"&lt;","<")
  str = StringTools::replace(str,"&gt;",">")
  str = StringTools::replace(str,"&quot;","\"")
  str = StringTools::replace(str,"&nbsp;",NBSP)
  str = StringTools::replace(str,"&amp;","&")
  return str
end

#html_entity_encode(str) ⇒ Object 



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 194

def html_entity_encode(str)
  str = StringTools::replace(str,"<","&lt;")
  str = StringTools::replace(str,">","&gt;")
  str = StringTools::replace(str,"\"","&quot;")
  str = StringTools::replace(str,"&","&amp;")
  return str
end

#math2Img(str, prop) ⇒ Object 



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 120

def math2Img(str,prop)
  img = "<img"
  output = PropertiesTools::newProperties()
  PropertiesTools::setProperty(prop,"centerbaseline","false")
  PropertiesTools::setProperty(prop,"accessible","true")
  PropertiesTools::setProperty(prop,"metrics","true")
  provider = @plugin::newGenericParamsProvider(prop)
  if (@plugin::getConfiguration()::getProperty("wirispluginperformance","false")=="false")
    src = @render::createImage(str,provider,output)
    img+=(" src=\""+src)+"\""
    alt = PropertiesTools::getProperty(output,"alt")
    width = PropertiesTools::getProperty(output,"width")
    height = PropertiesTools::getProperty(output,"height")
    baseline = PropertiesTools::getProperty(output,"baseline")
  else 
    digest = @render::computeDigest(str,prop)
    json = JSon::decode(@render::showImageJson(digest,PropertiesTools::getProperty(prop,"alt")))
    hashImage = (json)
    if (hashImage::get("status")=="warning")
      @render::showImage(nil,str,provider)
    end
    json = JSon::decode(@render::showImageJson(digest,"en"))
    hashImage = (json)
    if (hashImage::get("status")=="ok")
      result = (hashImage::get("result"))
      base64 = (result::get("base64"))
      img+=(" src=\"data:image/png;base64,"+base64)+"\""
      if result::exists("alt")
        alt = (result::get("alt"))
      else 
        alt = @service::mathml2accessible(str,nil,prop)
      end
      width = (result::get("width"))
      height = (result::get("height"))
      baseline = (result::get("baseline"))
    else 
      raise Exception,"Image can\'t be rendererd"
    end
  end
  dpi = Std::parseFloat(@plugin::getConfiguration()::getProperty(ConfigurationKeys::WIRIS_DPI,"96"))
  if @plugin::getConfiguration()::getProperty(ConfigurationKeys::EDITOR_PARAMS,nil)!=nil
    json = JSon::decode(@plugin::getConfiguration()::getProperty(ConfigurationKeys::EDITOR_PARAMS,nil))
    decodedHash = (json)
    if decodedHash::exists("dpi")
      dpi = Std::parseFloat((decodedHash::get("dpi")))
    end
  end
  mml = (@plugin::getConfiguration()::getProperty(ConfigurationKeys::FILTER_OUTPUT_MATHML,"false")=="true")
  f = 96/dpi
  dwidth = f*Std::parseFloat(width)
  dheight = f*Std::parseFloat(height)
  dbaseline = f*Std::parseFloat(baseline)
  alt = html_entity_encode(alt)
  img+=" class=\"Wirisformula\""
  img+=(" alt=\""+alt)+"\""
  img+=(" width=\""+(dwidth).to_s)+"\""
  img+=(" height=\""+(dheight).to_s)+"\""
  d = ((dbaseline-dheight))
  img+=(" style=\"vertical-align:"+d.to_s)+"px\""
  if mml
    tag = @plugin::getConfiguration()::getProperty(ConfigurationKeys::EDITOR_MATHML_ATTRIBUTE,"data-mathml")
    img+=(((" "+tag)+"=\"")+save_xml_encode(str))+"\""
  end
  img+="/>"
  return img
end

#save_xml_encode(str) ⇒ Object 



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# File 'lib/com/wiris/plugin/impl/TextFilter.rb', line 201

def save_xml_encode(str)
  tags = TextFilterTags::newSafeXml()
  str = StringTools::replace(str,tags::out_double_quote,tags::in_double_quote)
  str = StringTools::replace(str,tags::out_open,tags::in_open)
  str = StringTools::replace(str,tags::out_close,tags::in_close)
  str = StringTools::replace(str,tags::out_entity,tags::in_entity)
  str = StringTools::replace(str,tags::out_quote,tags::in_quote)
  return str
end