/
rtf-to-html.js
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/
rtf-to-html.js
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'use strict'
module.exports = rtfToHTML
function outputTemplate (doc, defaults, content) {
return `<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style>
body {
margin-left: ${doc.marginLeft / 20}pt;
margin-right: ${doc.marginRight / 20}pt;
margin-top: ${doc.marginTop / 20}pt;
margin-bottom: ${doc.marginBottom / 20}pt;
font-size: ${defaults.fontSize / 2}pt;
text-indent: ${defaults.firstLineIndent / 20}pt;
}
</style>
</head>
<body>
${content.replace(/\n/, '\n ')}
</body>
</html>
`
}
function rtfToHTML (doc, options) {
const defaults = Object.assign({
font: doc.style.font || {name: 'Times', family: 'roman'},
fontSize: doc.style.fontSize || 24,
bold: false,
italic: false,
underline: false,
strikethrough: false,
foreground: {red: 0, blue: 0, green: 0},
background: {red: 255, blue: 255, green: 255},
firstLineIndent: doc.style.firstLineIndent || 0,
indent: 0,
align: 'left',
valign: 'normal',
paraBreaks: '\n\n',
paraTag: 'p',
template: outputTemplate
}, options || {})
const content = doc.content
.map(para => renderPara(para.content ? para : {content: [para], style: {}}, defaults))
.filter(html => html != null)
.join(defaults.paraBreaks)
return defaults.template(doc, defaults, content)
}
function font (ft) {
const name = ft.name.replace(/-\w+$/, '')
const family = genericFontMap[ft.family]
if (name === 'ZapfDingbatsITC') return ''
return 'font-family: ' + name + (family ? `, ${family}` : '')
}
const genericFontMap = {
roman: 'serif',
swiss: 'sans-serif',
script: 'cursive',
decor: 'fantasy',
modern: 'sans-serif',
tech: 'monospace',
bidi: 'serif'
}
function colorEq (aa, bb) {
return aa.red === bb.red && aa.blue === bb.blue && aa.green === bb.green
}
function CSS (chunk, defaults) {
let css = ''
if (chunk.style.foreground != null && !colorEq(chunk.style.foreground, defaults.foreground)) {
css += `color: rgb(${chunk.style.foreground.red}, ${chunk.style.foreground.green}, ${chunk.style.foreground.blue});`
}
if (chunk.style.background != null && !colorEq(chunk.style.background, defaults.background)) {
css += `background-color: rgb(${chunk.style.background.red}, ${chunk.style.background.green}, ${chunk.style.background.blue});`
}
if (chunk.style.firstLineIndent != null && chunk.style.firstLineIndent > 0 && chunk.style.firstLineIndent !== defaults.firstLineIndent) {
css += `text-indent: ${chunk.style.firstLineIndent / 20}pt;`
}
if (chunk.style.indent != null && chunk.style.indent !== defaults.indent) {
css += `padding-left: ${chunk.style.indent / 20}pt;`
}
if (chunk.style.align != null && chunk.style.align !== defaults.align) {
css += `text-align: ${chunk.style.align};`
}
if (chunk.style.fontSize != null && chunk.style.fontSize !== defaults.fontSize) {
css += `font-size: ${chunk.style.fontSize / 2}pt;`
}
if (!defaults.disableFonts && chunk.style.font != null && chunk.style.font.name !== defaults.font.name) {
css += font(chunk.style.font)
}
return css
}
function styleTags (chunk, defaults) {
let open = ''
let close = ''
if (chunk.style.italic != null && chunk.style.italic !== defaults.italic) {
open += '<em>'
close = '</em>' + close
}
if (chunk.style.bold != null && chunk.style.bold !== defaults.bold) {
open += '<strong>'
close = '</strong>' + close
}
if (chunk.style.strikethrough != null && chunk.style.strikethrough !== defaults.strikethrough) {
open += '<s>'
close = '</s>' + close
}
if (chunk.style.underline != null && chunk.style.underline !== defaults.underline) {
open += '<u>'
close = '</u>' + close
}
if (chunk.style.valign != null && chunk.style.valign !== defaults.valign) {
if (chunk.style.valign === 'super') {
open += '<sup>'
close = '</sup>' + close
} else if (chunk.style.valign === 'sub') {
open += '<sup>'
close = '</sup>' + close
}
}
return {open, close}
}
function renderPara (para, defaults) {
if (!para.content || para.content.length === 0) return
const style = CSS(para, defaults)
const tags = styleTags(para, defaults)
const pdefaults = Object.assign({}, defaults)
for (let item of Object.keys(para.style)) {
if (para.style[item] != null) pdefaults[item] = para.style[item]
}
const paraTag = defaults.paraTag
return `<${paraTag}${style ? ' style="' + style + '"' : ''}>${tags.open}${para.content.map(span => renderSpan(span, pdefaults)).join('')}${tags.close}</${paraTag}>`
}
function renderSpan (span, defaults) {
const style = CSS(span, defaults)
const tags = styleTags(span, defaults)
const value = `${tags.open}${span.value}${tags.close}`
if (style) {
return `<span style="${style}">${value}</span>`
} else {
return value
}
}