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- # graphviz.coffee

- ¶

  Copyright 2023 The Apache Software Foundation

  Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

      http:#www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

- ¶

  ## t5/core/graphviz

  Support to the core/Graphviz Tapestry component.

      define ["https://cdn.jsdelivr.net/npm/@hpcc-js/wasm/dist/graphviz.umd.js"],
        (hpccWasm) ->
          render = (value, id, showDownloadLink) ->
            hpccWasm.Graphviz.load().then (graphviz) ->
              svg = graphviz.dot value
              div = document.getElementById id
              layout = graphviz.layout(value, "svg", "dot")
              div.innerHTML = layout
              if showDownloadLink
                link = document.getElementById (id + "-download")
                link.setAttribute "href", "data:image/svg+xml;charset=utf-8," + encodeURIComponent(layout)
          return render