Module: GeoserverMigrations::SldHelpers

Included in:
LayerConfig
Defined in:
lib/geoserver_migrations/sld_helpers.rb

Instance Method Summary collapse

Instance Method Details

#build_sld_filter(filter_hash) ⇒ Object 



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# File 'lib/geoserver_migrations/sld_helpers.rb', line 5

def build_sld_filter(filter_hash)
  filter_text = ""
  filters_count = filter_hash.keys.count
  if filters_count > 0
    if filters_count == 1
      filter_text = <<-FILTER
        <ogc:Filter>
          <ogc:PropertyIsEqualTo>
            <ogc:PropertyName>#{filter_hash.keys[0]}</ogc:PropertyName>
            <ogc:Literal>#{filter_hash.values[0]}</ogc:Literal>
          </ogc:PropertyIsEqualTo>
        </ogc:Filter>
      FILTER
    elsif filters_count == 2
      filter_text = <<-FILTER
        <ogc:Filter>
          <ogc:And>
            <ogc:PropertyIsEqualTo>
              <ogc:PropertyName>#{filter_hash.keys[0]}</ogc:PropertyName>
              <ogc:Literal>#{filter_hash.values[0]}</ogc:Literal>
            </ogc:PropertyIsEqualTo>
            <ogc:PropertyIsEqualTo>
              <ogc:PropertyName>#{filter_hash.keys[1]}</ogc:PropertyName>
              <ogc:Literal>#{filter_hash.values[1]}</ogc:Literal>
            </ogc:PropertyIsEqualTo>
          </ogc:And>  
        </ogc:Filter>
      FILTER
    else
      raise StandardError.new("Unsupported filter! For now we only support 1 or 2 filter-values :( :(")
    end
  end
  filter_text
end

#icon_style_with_label(title, icon_name, icon_style_options = {}) ⇒ Object 



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# File 'lib/geoserver_migrations/sld_helpers.rb', line 41

def icon_style_with_label(title, icon_name, icon_style_options={})
  display_label = icon_style_options[:display_label] || title
  abstract      = icon_style_options[:abstract] || title

  filter_text = ""
  if icon_style_options[:filter].present? && icon_style_options[:filter].is_a?(Hash)
    filter_text = build_sld_filter(icon_style_options[:filter])
  end

  max_scale_text = ""
  if icon_style_options[:max_scale_denominator].present?
    max_scale_text = "<MaxScaleDenominator>#{icon_style_options[:max_scale_denominator]}</MaxScaleDenominator>"
  end

  @options[:sld] = <<-SLD.strip_heredoc 
    <?xml version="1.0" encoding="UTF-8"?>
    <StyledLayerDescriptor version="1.0.0" xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc"
      xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.opengis.net/sld http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd">
      <NamedLayer>
        <Name>#{title}</Name>
        <UserStyle>
          <Name>#{title}</Name>
          <Title>#{title}</Title>
          <Abstract>#{abstract}</Abstract>
          <FeatureTypeStyle>
            <Rule>
              <Title>#{display_label}</Title>  
              #{filter_text}
              #{max_scale_text}  
              <PointSymbolizer>
                <Graphic>
                  <ExternalGraphic>
                    <OnlineResource xlink:type="simple" xlink:href="#{icon_name}" />
                    <Format>image/png</Format>
                  </ExternalGraphic>
                </Graphic>
                <VendorOption name="labelObstacle">true</VendorOption>
              </PointSymbolizer>
              <TextSymbolizer>
                <Label>
                  <ogc:PropertyName>name</ogc:PropertyName>
                </Label>
                <Font>
                  <CssParameter name="font-family">Arial</CssParameter>
                  <CssParameter name="font-size">11</CssParameter>
                  <CssParameter name="font-style">normal</CssParameter>
                  <CssParameter name="font-weight">bold</CssParameter>
                </Font>
                <LabelPlacement>
                  <PointPlacement>
                    <AnchorPoint>
                      <AnchorPointX>0</AnchorPointX>
                      <AnchorPointY>0</AnchorPointY>
                    </AnchorPoint>
                  </PointPlacement>
                </LabelPlacement>
                <Halo>
                  <Radius>
                    <ogc:Literal>1</ogc:Literal>
                  </Radius>
                  <Fill>
                    <CssParameter name="fill">#ffffff</CssParameter>
                  </Fill>
                </Halo>
                <Fill>
                  <CssParameter name="fill">#2f3133</CssParameter>
                </Fill>
                <VendorOption name="maxDisplacement">40</VendorOption>
                <!--VendorOption name="displacementMode">S, SW, W, NW, N</VendorOption-->
                <VendorOption name="conflictResolution">true</VendorOption>   
                <VendorOption name="partials">true</VendorOption>
              </TextSymbolizer>          
            </Rule>
          </FeatureTypeStyle>
        </UserStyle>
      </NamedLayer>
    </StyledLayerDescriptor>
  SLD

end

#line_style(title, style_options = {}) ⇒ Object 



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# File 'lib/geoserver_migrations/sld_helpers.rb', line 199

def line_style(title, style_options={})
  display_label = style_options[:display_label] || title
  abstract      = style_options[:abstract] || title

  stroke_colour = style_options[:stroke_colour] || "#000000"
  stroke_width  = style_options[:stroke_width]  || "1"


  filter_text = ""
  if style_options[:filter].present? && style_options[:filter].is_a?(Hash)
    filter_text = build_sld_filter(style_options[:filter])
  end

  max_scale_text = ""
  if style_options[:max_scale_denominator].present?
    max_scale_text = "<MaxScaleDenominator>#{style_options[:max_scale_denominator]}</MaxScaleDenominator>"
  end

  @options[:sld] = <<-SLD.strip_heredoc
    <?xml version="1.0" encoding="UTF-8"?>
    <StyledLayerDescriptor version="1.0.0" 
     xsi:schemaLocation="http://www.opengis.net/sld StyledLayerDescriptor.xsd" 
     xmlns="http://www.opengis.net/sld" 
     xmlns:ogc="http://www.opengis.net/ogc" 
     xmlns:xlink="http://www.w3.org/1999/xlink" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
      <NamedLayer>
        <Name>#{title}</Name>
        <UserStyle>
          <Name>#{title}</Name>
          <Title>#{title}</Title>
          <Abstract>#{abstract}</Abstract>
          <FeatureTypeStyle>
            <Rule>
              <Title>#{display_label}</Title>  
              #{filter_text}
              #{max_scale_text}  
              <LineSymbolizer>
                <Stroke>
                  <CssParameter name="stroke">#{stroke_colour}</CssParameter>
                  <CssParameter name="stroke-width">#{stroke_width}</CssParameter>
               </Stroke>
              </LineSymbolizer>
            </Rule>
          </FeatureTypeStyle>
        </UserStyle>
      </NamedLayer>
    </StyledLayerDescriptor>
  SLD

end

#polygon_style(title, style_options = {}) ⇒ Object 



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# File 'lib/geoserver_migrations/sld_helpers.rb', line 124

def polygon_style(title, style_options={})
  display_label = style_options[:display_label] || title
  abstract      = style_options[:abstract] || title

  fill_colour   = style_options[:fill_colour]   || "#aaaaaa"
  fill_opacity  = style_options[:fill_opacity]  || "1"
  stroke_colour = style_options[:stroke_colour] || "#000000"
  stroke_width  = style_options[:stroke_width]  || "1"

  filter_text = ""
  if style_options[:filter].present? && style_options[:filter].is_a?(Hash)
    filter_text = build_sld_filter(style_options[:filter])
  end

  fill_style = ""
  unless style_options[:no_fill] == true
    fill_styles = ["<Fill>"]
    fill_styles << "                      <CssParameter name=\"fill\">#{fill_colour}</CssParameter>"
    fill_styles << "                      <CssParameter name=\"opacity\">#{fill_opacity}</CssParameter>" if style_options[:fill_opacity].present?
    fill_styles << "                    </Fill>"
    fill_style = fill_styles.join("\n")
  end


  stroke_styles = []
  stroke_styles << "<Stroke>"
  stroke_styles << "                      <CssParameter name=\"stroke\">#{stroke_colour}</CssParameter>"
  stroke_styles << "                      <CssParameter name=\"stroke-width\">#{stroke_width}</CssParameter>"

  if style_options[:stroke_dasharray].present?
    stroke_styles << "                      <CssParameter name=\"stroke-dasharray\">"
    stroke_styles << "                           <ogc:Literal>#{style_options[:stroke_dasharray]}</ogc:Literal>"
    stroke_styles << "                      </CssParameter>"
  end
  stroke_styles << "                    </Stroke>"
  stroke_style = stroke_styles.join("\n")

  max_scale_text = ""
  if style_options[:max_scale_denominator].present?
    max_scale_text = "<MaxScaleDenominator>#{style_options[:max_scale_denominator]}</MaxScaleDenominator>"
  end

  @options[:sld] = <<-SLD.strip_heredoc
    <?xml version="1.0" encoding="UTF-8"?>
    <StyledLayerDescriptor version="1.0.0" 
     xsi:schemaLocation="http://www.opengis.net/sld StyledLayerDescriptor.xsd" 
     xmlns="http://www.opengis.net/sld" 
     xmlns:ogc="http://www.opengis.net/ogc" 
     xmlns:xlink="http://www.w3.org/1999/xlink" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
      <NamedLayer>
        <Name>#{title}</Name>
        <UserStyle>
          <Name>#{title}</Name>
          <Title>#{title}</Title>
          <Abstract>#{abstract}</Abstract>
          <FeatureTypeStyle>
            <Rule>
              <Title>#{display_label}</Title>  
              #{filter_text}
              #{max_scale_text}  
              <PolygonSymbolizer>   
                #{fill_style}
                #{stroke_style}
              </PolygonSymbolizer>
            </Rule>
          </FeatureTypeStyle>
        </UserStyle>
      </NamedLayer>
    </StyledLayerDescriptor>
  SLD

end