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255 lines
7.5 KiB
CoffeeScript
255 lines
7.5 KiB
CoffeeScript
fs = require 'fs'
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vm = require 'vm'
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md = require('markdown').markdown
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coffee = require 'coffee-script'
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CodeMirror = require 'codemirror/addon/runmode/runmode.node'
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PDFDocument = require '../'
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process.chdir(__dirname)
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# setup code mirror coffeescript mode
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filename = require.resolve('codemirror/mode/coffeescript/coffeescript')
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coffeeMode = fs.readFileSync filename, 'utf8'
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vm.runInNewContext coffeeMode, CodeMirror: CodeMirror
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# style definitions for markdown
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styles =
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h1:
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font: 'fonts/Alegreya-Bold.ttf'
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fontSize: 25
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padding: 15
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h2:
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font: 'fonts/Alegreya-Bold.ttf'
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fontSize: 18
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padding: 10
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h3:
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font: 'fonts/Alegreya-Bold.ttf'
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fontSize: 18
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padding: 10
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para:
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font: 'fonts/Merriweather-Regular.ttf'
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fontSize: 10
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padding: 10
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code:
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font: 'fonts/SourceCodePro-Regular.ttf'
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fontSize: 9
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code_block:
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padding: 10
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background: '#2c2c2c'
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inlinecode:
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font: 'fonts/SourceCodePro-Bold.ttf'
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fontSize: 10
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listitem:
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font: 'fonts/Merriweather-Regular.ttf'
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fontSize: 10
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padding: 6
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link:
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font: 'fonts/Merriweather-Regular.ttf'
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fontSize: 10
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color: 'blue'
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underline: true
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example:
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font: 'Helvetica'
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fontSize: 9
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color: 'black'
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padding: 10
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# syntax highlighting colors
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# based on Github's theme
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colors =
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keyword: '#cb4b16'
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atom: '#d33682'
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number: '#009999'
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def: '#2aa198'
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variable: '#108888'
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'variable-2': '#b58900'
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'variable-3': '#6c71c4'
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property: '#2aa198'
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operator: '#6c71c4'
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comment: '#999988'
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string: '#dd1144'
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'string-2': '#009926'
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meta: '#768E04'
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qualifier: '#b58900'
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builtin: '#d33682'
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bracket: '#cb4b16'
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tag: '#93a1a1'
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attribute: '#2aa198'
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header: '#586e75'
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quote: '#93a1a1'
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link: '#93a1a1'
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special: '#6c71c4'
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default: '#002b36'
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# shared lorem ipsum text so we don't need to copy it into every example
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lorem = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam in suscipit purus. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Vivamus nec hendrerit felis. Morbi aliquam facilisis risus eu lacinia. Sed eu leo in turpis fringilla hendrerit. Ut nec accumsan nisl. Suspendisse rhoncus nisl posuere tortor tempus et dapibus elit porta. Cras leo neque, elementum a rhoncus ut, vestibulum non nibh. Phasellus pretium justo turpis. Etiam vulputate, odio vitae tincidunt ultricies, eros odio dapibus nisi, ut tincidunt lacus arcu eu elit. Aenean velit erat, vehicula eget lacinia ut, dignissim non tellus. Aliquam nec lacus mi, sed vestibulum nunc. Suspendisse potenti. Curabitur vitae sem turpis. Vestibulum sed neque eget dolor dapibus porttitor at sit amet sem. Fusce a turpis lorem. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae;'
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codeBlocks = []
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lastType = null
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# This class represents a node in the markdown tree, and can render it to pdf
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class Node
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constructor: (tree) ->
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# special case for text nodes
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if typeof tree is 'string'
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@type = 'text'
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@text = tree
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return
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@type = tree.shift()
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@attrs = {}
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if typeof tree[0] is 'object' and not Array.isArray tree[0]
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@attrs = tree.shift()
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# parse sub nodes
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@content = while tree.length
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new Node tree.shift()
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switch @type
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when 'header'
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@type = 'h' + @attrs.level
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when 'code_block'
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# use code mirror to syntax highlight the code block
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code = @content[0].text
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@content = []
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CodeMirror.runMode code, 'coffeescript', (text, style) =>
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color = colors[style] or colors.default
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opts =
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color: color
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continued: text isnt '\n'
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@content.push new Node ['code', opts, text]
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@content[@content.length - 1]?.attrs.continued = false
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codeBlocks.push code
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when 'img'
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# images are used to generate inline example output
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# compiles the coffeescript to JS so it can be run
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# in the render method
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@type = 'example'
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code = codeBlocks[@attrs.alt]
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@code = coffee.compile code if code
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@height = +@attrs.title or 0
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@style = styles[@type] or styles.para
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# sets the styles on the document for this node
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setStyle: (doc) ->
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if @style.font
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doc.font @style.font
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if @style.fontSize
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doc.fontSize @style.fontSize
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if @style.color or @attrs.color
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doc.fillColor @style.color or @attrs.color
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else
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doc.fillColor 'black'
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options = {}
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options.align = @style.align
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options.link = @attrs.href or false # override continued link
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options.continued = @attrs.continued if @attrs.continued?
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return options
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# renders this node and its subnodes to the document
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render: (doc, continued = false) ->
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switch @type
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when 'example'
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@setStyle doc
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# translate all points in the example code to
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# the current point in the document
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doc.moveDown()
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doc.save()
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doc.translate(doc.x, doc.y)
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x = doc.x
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y = doc.y
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doc.x = doc.y = 0
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# run the example code with the document
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vm.runInNewContext @code,
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doc: doc
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lorem: lorem
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# restore points and styles
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y += doc.y
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doc.restore()
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doc.x = x
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doc.y = y + @height
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when 'hr'
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doc.addPage()
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else
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# loop through subnodes and render them
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for fragment, index in @content
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if fragment.type is 'text'
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# add a new page for each heading, unless it follows another heading
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if @type in ['h1', 'h2'] and lastType? and lastType isnt 'h1'
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doc.addPage()
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# set styles and whether this fragment is continued (for rich text wrapping)
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options = @setStyle doc
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options.continued ?= continued or index < @content.length - 1
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# remove newlines unless this is code
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unless @type is 'code'
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fragment.text = fragment.text.replace(/[\r\n]\s*/g, ' ')
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doc.text fragment.text, options
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else
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fragment.render doc, index < @content.length - 1 and @type isnt 'bulletlist'
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lastType = @type
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if @style.padding
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doc.y += @style.padding
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# reads and renders a markdown/literate coffeescript file to the document
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render = (doc, filename) ->
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codeBlocks = []
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tree = md.parse fs.readFileSync(filename, 'utf8')
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tree.shift()
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while tree.length
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node = new Node tree.shift()
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node.render(doc)
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# renders the title page of the guide
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renderTitlePage = (doc) ->
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title = 'PDFKit Guide'
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author = 'By Devon Govett'
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version = 'Version ' + require('../package.json').version
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doc.font 'fonts/AlegreyaSans-Light.ttf', 60
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doc.y = doc.page.height / 2 - doc.currentLineHeight()
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doc.text title, align: 'center'
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w = doc.widthOfString(title)
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doc.fontSize 20
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doc.y -= 10
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doc.text author,
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align: 'center'
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indent: w - doc.widthOfString(author)
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doc.font styles.para.font, 10
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doc.text version,
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align: 'center'
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indent: w - doc.widthOfString(version)
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doc.addPage()
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# render all sections of the guide and write the pdf file
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do ->
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doc = new PDFDocument
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doc.pipe fs.createWriteStream('guide.pdf')
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renderTitlePage doc
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render doc, 'getting_started.coffee.md'
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render doc, 'vector.coffee.md'
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render doc, 'text.coffee.md'
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render doc, 'images.coffee.md'
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render doc, 'annotations.coffee.md'
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doc.end()
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