mirror of
https://github.com/dutchcoders/transfer.sh.git
synced 2020-11-18 19:53:40 -08:00
81 lines
2.2 KiB
Go
81 lines
2.2 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package driver
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import (
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"regexp"
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"strings"
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"github.com/google/pprof/third_party/svgpan"
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)
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var (
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viewBox = regexp.MustCompile(`<svg\s*width="[^"]+"\s*height="[^"]+"\s*viewBox="[^"]+"`)
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graphID = regexp.MustCompile(`<g id="graph\d"`)
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svgClose = regexp.MustCompile(`</svg>`)
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)
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// massageSVG enhances the SVG output from DOT to provide better
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// panning inside a web browser. It uses the svgpan library, which is
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// embedded into the svgpan.JSSource variable.
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func massageSVG(svg string) string {
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// Work around for dot bug which misses quoting some ampersands,
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// resulting on unparsable SVG.
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svg = strings.Replace(svg, "&;", "&;", -1)
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// Dot's SVG output is
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//
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// <svg width="___" height="___"
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// viewBox="___" xmlns=...>
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// <g id="graph0" transform="...">
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// ...
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// </g>
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// </svg>
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//
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// Change it to
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//
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// <svg width="100%" height="100%"
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// xmlns=...>
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// <script type="text/ecmascript"><![CDATA[` ..$(svgpan.JSSource)... `]]></script>`
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// <g id="viewport" transform="translate(0,0)">
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// <g id="graph0" transform="...">
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// ...
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// </g>
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// </g>
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// </svg>
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if loc := viewBox.FindStringIndex(svg); loc != nil {
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svg = svg[:loc[0]] +
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`<svg width="100%" height="100%"` +
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svg[loc[1]:]
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}
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if loc := graphID.FindStringIndex(svg); loc != nil {
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svg = svg[:loc[0]] +
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`<script type="text/ecmascript"><![CDATA[` + string(svgpan.JSSource) + `]]></script>` +
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`<g id="viewport" transform="scale(0.5,0.5) translate(0,0)">` +
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svg[loc[0]:]
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}
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if loc := svgClose.FindStringIndex(svg); loc != nil {
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svg = svg[:loc[0]] +
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`</g>` +
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svg[loc[0]:]
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}
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return svg
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}
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