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core.js
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core.js
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var
optsParser = require('opts-parser'),
match = require('syntaxhighlighter-match'),
Renderer = require('syntaxhighlighter-html-renderer').default,
utils = require('./utils'),
transformers = require('./transformers'),
dom = require('./dom'),
config = require('./config'),
defaults = require('./defaults'),
HtmlScript = require('./html_script')
;
const sh = {
Match: match.Match,
Highlighter: require('brush-base'),
config: require('./config'),
regexLib: require('syntaxhighlighter-regex').commonRegExp,
/** Internal 'global' variables. */
vars : {
discoveredBrushes : null,
highlighters : {}
},
/** This object is populated by user included external brush files. */
brushes : {},
/**
* Finds all elements on the page which should be processes by SyntaxHighlighter.
*
* @param {Object} globalParams Optional parameters which override element's
* parameters. Only used if element is specified.
*
* @param {Object} element Optional element to highlight. If none is
* provided, all elements in the current document
* are returned which qualify.
*
* @return {Array} Returns list of <code>{ target: DOMElement, params: Object }</code> objects.
*/
findElements: function(globalParams, element)
{
var elements = element ? [element] : utils.toArray(document.getElementsByTagName(sh.config.tagName)),
conf = sh.config,
result = []
;
// support for <SCRIPT TYPE="syntaxhighlighter" /> feature
elements = elements.concat(dom.getSyntaxHighlighterScriptTags());
if (elements.length === 0)
return result;
for (var i = 0, l = elements.length; i < l; i++)
{
var item = {
target: elements[i],
// local params take precedence over globals
params: optsParser.defaults(optsParser.parse(elements[i].className), globalParams)
};
if (item.params['brush'] == null)
continue;
result.push(item);
}
return result;
},
/**
* Shorthand to highlight all elements on the page that are marked as
* SyntaxHighlighter source code.
*
* @param {Object} globalParams Optional parameters which override element's
* parameters. Only used if element is specified.
*
* @param {Object} element Optional element to highlight. If none is
* provided, all elements in the current document
* are highlighted.
*/
highlight: function(globalParams, element)
{
var elements = sh.findElements(globalParams, element),
propertyName = 'innerHTML',
brush = null,
renderer,
conf = sh.config
;
if (elements.length === 0)
return;
for (var i = 0, l = elements.length; i < l; i++)
{
var element = elements[i],
target = element.target,
params = element.params,
brushName = params.brush,
brush,
matches,
code
;
if (brushName == null)
continue;
brush = findBrush(brushName);
if (!brush)
continue;
// local params take precedence over defaults
params = optsParser.defaults(params || {}, defaults);
params = optsParser.defaults(params, config);
// Instantiate a brush
if (params['html-script'] == true || defaults['html-script'] == true)
{
brush = new HtmlScript(findBrush('xml'), brush);
brushName = 'htmlscript';
}
else
{
brush = new brush();
}
code = target[propertyName];
// remove CDATA from <SCRIPT/> tags if it's present
if (conf.useScriptTags)
code = stripCData(code);
// Inject title if the attribute is present
if ((target.title || '') != '')
params.title = target.title;
params['brush'] = brushName;
code = transformers(code, params);
matches = match.applyRegexList(code, brush.regexList, params);
renderer = new Renderer(code, matches, params);
element = dom.create('div');
element.innerHTML = renderer.getHtml();
// id = utils.guid();
// element.id = highlighters.id(id);
// highlighters.set(id, element);
if (params.quickCode)
dom.attachEvent(dom.findElement(element, '.code'), 'dblclick', dom.quickCodeHandler);
// carry over ID
if ((target.id || '') != '')
element.id = target.id;
target.parentNode.replaceChild(element, target);
}
}
}; // end of sh
/**
* Displays an alert.
* @param {String} str String to display.
*/
function alert(str)
{
window.alert('SyntaxHighlighter\n\n' + str);
};
/**
* Finds a brush by its alias.
*
* @param {String} alias Brush alias.
* @param {Boolean} showAlert Suppresses the alert if false.
* @return {Brush} Returns bursh constructor if found, null otherwise.
*/
function findBrush(alias, showAlert)
{
var brushes = sh.vars.discoveredBrushes,
result = null
;
if (brushes == null)
{
brushes = {};
// Find all brushes
for (var brushName in sh.brushes)
{
var brush = sh.brushes[brushName],
aliases = brush.aliases
;
if (aliases == null) {
continue;
}
brush.className = brush.className || brush.aliases[0];
brush.brushName = brush.className || brushName.toLowerCase();
for (var i = 0, l = aliases.length; i < l; i++) {
brushes[aliases[i]] = brushName;
}
}
sh.vars.discoveredBrushes = brushes;
}
result = sh.brushes[brushes[alias]];
if (result == null && showAlert)
alert(sh.config.strings.noBrush + alias);
return result;
};
/**
* Strips <![CDATA[]]> from <SCRIPT /> content because it should be used
* there in most cases for XHTML compliance.
* @param {String} original Input code.
* @return {String} Returns code without leading <![CDATA[]]> tags.
*/
function stripCData(original)
{
var left = '<![CDATA[',
right = ']]>',
// for some reason IE inserts some leading blanks here
copy = utils.trim(original),
changed = false,
leftLength = left.length,
rightLength = right.length
;
if (copy.indexOf(left) == 0)
{
copy = copy.substring(leftLength);
changed = true;
}
var copyLength = copy.length;
if (copy.indexOf(right) == copyLength - rightLength)
{
copy = copy.substring(0, copyLength - rightLength);
changed = true;
}
return changed ? copy : original;
};
let brushCounter = 0;
export default sh;
export const registerBrush = brush => sh.brushes['brush' + brushCounter++] = brush.default || brush;
export const clearRegisteredBrushes = () => {
sh.brushes = {};
brushCounter = 0;
}
/* an EJS hook for `gulp build --brushes` command
* <%- registerBrushes %>
*/