134 lines
4.8 KiB
JavaScript
134 lines
4.8 KiB
JavaScript
// vim: et:ts=4:sw=4:sts=4:ft=javascript
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'use strict';
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/*@
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Ox.SyntaxHighlighter <function> Syntax Highlighter
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(options[, self]) -> <o> Syntax Highlighter
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options <o> Options
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lineLength <n|0> If larger than zero, show edge of page
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offset <n|1> First line number
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showLinebreaks <b|false> If true, show linebreaks
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showLineNumbers <b|false> If true, show line numbers
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showWhitespace <b|false> If true, show whitespace
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showTabs <b|false> If true, show tabs
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source <s|''> JavaScript source
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stripComments <b|false> If true, strip comments
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tabSize <n|4> Number of spaces per tab
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self <o> Shared private variable
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@*/
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Ox.SyntaxHighlighter = function(options, self) {
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self = self || {};
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var that = Ox.Element({}, self)
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.defaults({
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lineLength: 0,
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offset: 1,
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showLinebreaks: false,
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showLineNumbers: false,
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showTabs: false,
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showWhitespace: false,
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source: '',
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stripComments: false,
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tabSize: 4,
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})
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.options(options || {})
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.addClass('OxSyntaxHighlighter');
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renderSource();
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function renderSource() {
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var $lineNumbers, $line, $source, width,
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lines, source = '', tokens,
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linebreak = (
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self.options.showLinebreaks
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? '<span class="OxLinebreak">\u21A9</span>' : ''
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) + '<br/>',
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tab = (
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self.options.showTabs ?
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'<span class="OxTab">\u2192</span>' : ''
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) + Ox.repeat(' ', self.options.tabSize - self.options.showTabs),
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whitespace = self.options.showWhitespace ? '\u00B7' : ' ';
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self.options.source = self.options.source
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.replace(/\r\n/g, '\n')
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.replace(/\r/g, '\n');
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tokens = Ox.tokenize(self.options.source);
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tokens.forEach(function(token, i) {
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var classNames,
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substr = self.options.source.substr(token.offset, token.length);
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if (
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!(self.options.stripComments && token.type == 'comment')
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) {
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classNames = 'Ox' + Ox.toTitleCase(token.type);
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if (self.options.showWhitespace && token.type == 'whitespace') {
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if (isAfterLinebreak() && hasIrregularSpaces()) {
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classNames += ' OxLeading';
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} else if (isBeforeLinebreak()) {
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classNames += ' OxTrailing';
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}
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}
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source += '<span class="' + classNames + '">' +
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Ox.encodeHTML(substr)
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.replace(/ /g, whitespace)
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.replace(/\t/g, tab)
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.replace(/\n/g, linebreak) + '</span>';
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}
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function isAfterLinebreak() {
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return i == 0 ||
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tokens[i - 1].type == 'linebreak';
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}
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function isBeforeLinebreak() {
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return i == tokens.length - 1 ||
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tokens[i + 1].type == 'linebreak';
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}
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function hasIrregularSpaces() {
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return substr.split('').reduce(function(prev, curr) {
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return prev + (curr == ' ' ? 1 : 0);
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}, 0) % self.options.tabSize;
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}
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});
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lines = source.split('<br/>');
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that.empty();
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if (self.options.showLineNumbers) {
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$lineNumbers = Ox.Element()
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.addClass('OxLineNumbers')
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.html(
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Ox.range(lines.length).map(function(line) {
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return (line + self.options.offset);
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}).join('<br/>')
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)
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.appendTo(that);
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}
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$source = Ox.Element()
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.addClass('OxSourceCode')
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.html(source)
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.appendTo(that);
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if (self.options.lineLength) {
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$line = Ox.Element()
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.css({
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position: 'absolute',
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top: '-1000px'
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})
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.html(Ox.repeat(' ', self.options.lineLength))
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.appendTo(that);
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width = $line.width() + 4; // add padding
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$line.remove();
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['moz', 'webkit'].forEach(function(browser) {
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$source.css({
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background: '-' + browser +
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'-linear-gradient(left, rgb(255, 255, 255) ' +
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width + 'px, rgb(192, 192, 192) ' + width +
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'px, rgb(255, 255, 255) ' + (width + 1) + 'px)'
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});
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});
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}
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}
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self.setOption = function(key, value) {
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renderSource();
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};
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return that;
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};
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