mermaid/lib/phantomscript.js

232 lines
6.3 KiB
JavaScript

/**
* Credits:
* - SVG Processing from the NYTimes svg-crowbar, under an MIT license
* https://github.com/NYTimes/svg-crowbar
* - Thanks to the grunticon project for some guidance
* https://github.com/filamentgroup/grunticon
*/
window.phantom.onError = function (msg, trace) {
var msgStack = ['PHANTOM ERROR: ' + msg]
if (trace && trace.length) {
msgStack.push('TRACE:')
trace.forEach(function (t) {
msgStack.push(
' -> ' +
(t.file || t.sourceURL) +
': ' +
t.line +
(t.function ? ' (in function ' + t.function + ')' : '')
)
})
}
system.stderr.write(msgStack.join('\n'))
window.phantom.exit(1)
}
var system = require('system')
var fs = require('fs')
var webpage = require('webpage')
var page = webpage.create()
var files = system.args.slice(10, system.args.length)
var width = system.args[8]
if (typeof width === 'undefined' || width === 'undefined') {
width = 1200
}
var options = {
outputDir: system.args[1],
png: system.args[2] === 'true',
svg: system.args[3] === 'true',
css: fs.read(system.args[4]),
sequenceConfig: system.args[5] !== 'null' ? JSON.parse(fs.read(system.args[5])) : {},
ganttConfig: system.args[6] !== 'null' ? JSON.parse(fs.read(system.args[6])) : {},
verbose: system.args[7] === 'true',
width: width,
outputSuffix: system.args[9]
}
var log = logger(options.verbose)
options.sequenceConfig.useMaxWidth = false
page.content = [
'<html>',
'<head>',
'<style type="text/css">body {background:white;font-family: Arial;}',
options.css,
'</style>',
'</head>',
'<body>',
'</body>',
'</html>'
].join('\n')
page.injectJs('../dist/mermaid.js')
page.onConsoleMessage = function (msg, lineNum, sourceId) {
log('CONSOLE: ' + msg + ' (from line #' + lineNum + ' in "' + sourceId + '")')
}
log('Num files to execute : ' + files.length)
files.forEach(function (file) {
var contents = fs.read(file)
var filename = file.split(fs.separator).slice(-1)
var oParser = new window.DOMParser()
var oDOM
var svgContent
log('ready to execute: ' + file)
// this JS is executed in this statement is sandboxed, even though it doesn't
// look like it. we need to serialize then unserialize the svgContent that's
// taken from the DOM
svgContent = page.evaluate(executeInPage, {
contents: contents,
ganttConfig: options.ganttConfig,
sequenceConfig: options.sequenceConfig,
confWidth: options.width
})
oDOM = oParser.parseFromString(svgContent, 'text/xml')
resolveSVGElement(oDOM.firstChild)
setSVGStyle(oDOM.firstChild, options.css)
var outputPath = options.outputDir + fs.separator + filename + options.outputSuffix
if (options.png) {
page.viewportSize = {
width: ~~oDOM.documentElement.attributes.getNamedItem('width').value,
height: ~~oDOM.documentElement.attributes.getNamedItem('height').value
}
page.render(outputPath + '.png')
log('saved png: ' + outputPath + '.png')
}
if (options.svg) {
var serialize = new window.XMLSerializer()
fs.write(outputPath + '.svg'
, serialize.serializeToString(oDOM) + '\n'
, 'w'
)
log('saved svg: ' + outputPath + '.svg')
}
})
window.phantom.exit()
function logger (_verbose) {
var verbose = _verbose
return function (_message, _level) {
var level = _level
var message = _message
var log
log = level === 'error' ? system.stderr : system.stdout
if (verbose) {
log.write(message + '\n')
}
}
}
function resolveSVGElement (element) {
var prefix = {
xmlns: 'http://www.w3.org/2000/xmlns/',
xlink: 'http://www.w3.org/1999/xlink',
svg: 'http://www.w3.org/2000/svg'
}
element.setAttribute('version', '1.1')
// removing attributes so they aren't doubled up
element.removeAttribute('xmlns')
element.removeAttribute('xlink')
// These are needed for the svg
if (!element.hasAttributeNS(prefix.xmlns, 'xmlns')) {
element.setAttributeNS(prefix.xmlns, 'xmlns', prefix.svg)
}
if (!element.hasAttributeNS(prefix.xmlns, 'xmlns:xlink')) {
element.setAttributeNS(prefix.xmlns, 'xmlns:xlink', prefix.xlink)
}
}
function setSVGStyle (svg, css) {
if (!css || !svg) { return }
var styles = svg.getElementsByTagName('style')
if (!styles || styles.length === 0) { return }
styles[0].textContent = css
}
// The sandboxed function that's executed in-page by phantom
function executeInPage (data) {
var xmlSerializer = new window.XMLSerializer()
var contents = data.contents
var sequenceConfig = JSON.stringify(data.sequenceConfig)
var ganttConfig = JSON.stringify(data.ganttConfig).replace(/"(function.*})"/, '$1')
var svg
var svgValue
var boundingBox
var width
var height
var confWidth = data.confWidth
var toRemove = document.getElementsByClassName('mermaid')
if (toRemove && toRemove.length) {
for (var i = 0, len = toRemove.length; i < len; i++) {
toRemove[i].parentNode.removeChild(toRemove[i])
}
}
var el = document.createElement('div')
el.className = 'mermaid'
el.appendChild(document.createTextNode(contents))
document.body.appendChild(el)
var config = {
sequenceDiagram: JSON.parse(sequenceConfig),
flowchart: { useMaxWidth: false },
logLevel: 1
}
window.mermaid.initialize(config)
var sc = document.createElement('script')
sc.appendChild(document.createTextNode('mermaid.ganttConfig = ' + ganttConfig + ';'))
document.body.appendChild(sc)
window.mermaid.init()
svg = document.querySelector('svg')
boundingBox = svg.getBoundingClientRect() // the initial bonding box of the svg
width = boundingBox.width * 1.5 // adding the scale factor for consistency with output in chrome browser
height = boundingBox.height * 1.5 // adding the scale factor for consistency with output in chrome browser
var scalefactor = confWidth / (width - 8)
// resizing the body to fit the svg
document.body.setAttribute(
'style'
, 'width: ' + (confWidth - 8) + '; height: ' + (height * scalefactor) + ';'
)
// resizing the svg via css for consistent display
svg.setAttribute(
'style'
, 'width: ' + (confWidth - 8) + '; height: ' + (height * scalefactor) + ';'
)
// set witdth and height attributes used to set the viewport when rending png image
svg.setAttribute(
'width'
, confWidth
)
svg.setAttribute(
'height'
, height * scalefactor
)
svgValue = xmlSerializer.serializeToString(svg) + '\n'
return svgValue
}