highlight.js
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// change_to: "on" or "off"
EditArea.prototype.change_highlight= function(change_to){
if(this.settings["syntax"].length==0 && change_to==false){
this.switchClassSticky(_$("highlight"), 'editAreaButtonDisabled', true);
this.switchClassSticky(_$("reset_highlight"), 'editAreaButtonDisabled', true);
return false;
}
if(this.do_highlight==change_to)
return false;
this.getIESelection();
var pos_start= this.textarea.selectionStart;
var pos_end= this.textarea.selectionEnd;
if(this.do_highlight===true || change_to==false)
this.disable_highlight();
else
this.enable_highlight();
this.textarea.focus();
this.textarea.selectionStart = pos_start;
this.textarea.selectionEnd = pos_end;
this.setIESelection();
};
EditArea.prototype.disable_highlight= function(displayOnly){
var t= this, a=t.textarea, new_Obj, old_class, new_class;
t.selection_field.innerHTML="";
t.selection_field_text.innerHTML="";
t.content_highlight.style.visibility="hidden";
// replacing the node is far more faster than deleting it's content in firefox
new_Obj= t.content_highlight.cloneNode(false);
new_Obj.innerHTML= "";
t.content_highlight.parentNode.insertBefore(new_Obj, t.content_highlight);
t.content_highlight.parentNode.removeChild(t.content_highlight);
t.content_highlight= new_Obj;
old_class= parent.getAttribute( a,"class" );
if(old_class){
new_class= old_class.replace( "hidden","" );
parent.setAttribute( a, "class", new_class );
}
a.style.backgroundColor="transparent"; // needed in order to see the bracket finders
//var icon= document.getElementById("highlight");
//setAttribute(icon, "class", getAttribute(icon, "class").replace(/ selected/g, "") );
//t.restoreClass(icon);
//t.switchClass(icon,'editAreaButtonNormal');
t.switchClassSticky(_$("highlight"), 'editAreaButtonNormal', true);
t.switchClassSticky(_$("reset_highlight"), 'editAreaButtonDisabled', true);
t.do_highlight=false;
t.switchClassSticky(_$("change_smooth_selection"), 'editAreaButtonSelected', true);
if(typeof(t.smooth_selection_before_highlight)!="undefined" && t.smooth_selection_before_highlight===false){
t.change_smooth_selection_mode(false);
}
// this.textarea.style.backgroundColor="#FFFFFF";
};
EditArea.prototype.enable_highlight= function(){
var t=this, a=t.textarea, new_class;
t.show_waiting_screen();
t.content_highlight.style.visibility="visible";
new_class =parent.getAttribute(a,"class")+" hidden";
parent.setAttribute( a, "class", new_class );
// IE can't manage mouse click outside text range without this
if( t.isIE )
a.style.backgroundColor="#FFFFFF";
t.switchClassSticky(_$("highlight"), 'editAreaButtonSelected', false);
t.switchClassSticky(_$("reset_highlight"), 'editAreaButtonNormal', false);
t.smooth_selection_before_highlight=t.smooth_selection;
if(!t.smooth_selection)
t.change_smooth_selection_mode(true);
t.switchClassSticky(_$("change_smooth_selection"), 'editAreaButtonDisabled', true);
t.do_highlight=true;
t.resync_highlight();
t.hide_waiting_screen();
};
/**
* Ask to update highlighted text
* @param Array infos - Array of datas returned by EditArea.get_selection_infos()
*/
EditArea.prototype.maj_highlight= function(infos){
// for speed mesure
var debug_opti="",tps_start= new Date().getTime(), tps_middle_opti=new Date().getTime();
var t=this, hightlighted_text, updated_highlight;
var textToHighlight=infos["full_text"], doSyntaxOpti = false, doHtmlOpti = false, stay_begin="", stay_end="", trace_new , trace_last;
if(t.last_text_to_highlight==infos["full_text"] && t.resync_highlight!==true)
return;
// OPTIMISATION: will search to update only changed lines
if(t.reload_highlight===true){
t.reload_highlight=false;
}else if(textToHighlight.length==0){
textToHighlight="\n ";
}else{
// get text change datas
changes = t.checkTextEvolution(t.last_text_to_highlight,textToHighlight);
// check if it can only reparse the changed text
trace_new = t.get_syntax_trace(changes.newTextLine).replace(/\r/g, '');
trace_last = t.get_syntax_trace(changes.lastTextLine).replace(/\r/g, '');
doSyntaxOpti = ( trace_new == trace_last );
// check if the difference comes only from a new line created
// => we have to remember that the editor can automaticaly add tabulation or space after the new line)
if( !doSyntaxOpti && trace_new == "\n"+trace_last && /^[ \t\s]*\n[ \t\s]*$/.test( changes.newText.replace(/\r/g, '') ) && changes.lastText =="" )
{
doSyntaxOpti = true;
}
// we do the syntax optimisation
if( doSyntaxOpti ){
tps_middle_opti=new Date().getTime();
stay_begin= t.last_hightlighted_text.split("\n").slice(0, changes.lineStart).join("\n");
if(changes.lineStart>0)
stay_begin+= "\n";
stay_end= t.last_hightlighted_text.split("\n").slice(changes.lineLastEnd+1).join("\n");
if(stay_end.length>0)
stay_end= "\n"+stay_end;
// Final check to see that we're not in the middle of span tags
if( stay_begin.split('<span').length != stay_begin.split('</span').length
|| stay_end.split('<span').length != stay_end.split('</span').length )
{
doSyntaxOpti = false;
stay_end = '';
stay_begin = '';
}
else
{
if(stay_begin.length==0 && changes.posLastEnd==-1)
changes.newTextLine+="\n";
textToHighlight=changes.newTextLine;
}
}
if(t.settings["debug"]){
var ch =changes;
debug_opti= ( doSyntaxOpti?"Optimisation": "No optimisation" )
+" start: "+ch.posStart +"("+ch.lineStart+")"
+" end_new: "+ ch.posNewEnd+"("+ch.lineNewEnd+")"
+" end_last: "+ ch.posLastEnd+"("+ch.lineLastEnd+")"
+"\nchanged_text: "+ch.newText+" => trace: "+trace_new
+"\nchanged_last_text: "+ch.lastText+" => trace: "+trace_last
//debug_opti+= "\nchanged: "+ infos["full_text"].substring(ch.posStart, ch.posNewEnd);
+ "\nchanged_line: "+ch.newTextLine
+ "\nlast_changed_line: "+ch.lastTextLine
+"\nstay_begin: "+ stay_begin.slice(-100)
+"\nstay_end: "+ stay_end.substr( 0, 100 );
//debug_opti="start: "+stay_begin_len+ "("+nb_line_start_unchanged+") end: "+ (stay_end_len)+ "("+(splited.length-nb_line_end_unchanged)+") ";
//debug_opti+="changed: "+ textToHighlight.substring(stay_begin_len, textToHighlight.length-stay_end_len)+" \n";
//debug_opti+="changed: "+ stay_begin.substr(stay_begin.length-200)+ "----------"+ textToHighlight+"------------------"+ stay_end.substr(0,200) +"\n";
+"\n";
}
// END OPTIMISATION
}
tps_end_opti = new Date().getTime();
// apply highlight
updated_highlight = t.colorize_text(textToHighlight);
tpsAfterReg = new Date().getTime();
/***
* see if we can optimize for updating only the required part of the HTML code
*
* The goal here will be to find the text node concerned by the modification and to update it
*/
//-------------------------------------------
// disable latest optimization tricks (introduced in 0.8.1 and removed in 0.8.2), TODO: check for another try later
doSyntaxOpti = doHtmlOpti = false;
if( doSyntaxOpti )
{
try
{
var replacedBloc, i, nbStart = '', nbEnd = '', newHtml, lengthOld, lengthNew;
replacedBloc = t.last_hightlighted_text.substring( stay_begin.length, t.last_hightlighted_text.length - stay_end.length );
lengthOld = replacedBloc.length;
lengthNew = updated_highlight.length;
// find the identical caracters at the beginning
for( i=0; i < lengthOld && i < lengthNew && replacedBloc.charAt(i) == updated_highlight.charAt(i) ; i++ )
{
}
nbStart = i;
// find the identical caracters at the end
for( i=0; i + nbStart < lengthOld && i + nbStart < lengthNew && replacedBloc.charAt(lengthOld-i-1) == updated_highlight.charAt(lengthNew-i-1) ; i++ )
{
}
nbEnd = i;
//console.log( nbStart, nbEnd, replacedBloc, updated_highlight );
// get the changes
lastHtml = replacedBloc.substring( nbStart, lengthOld - nbEnd );
newHtml = updated_highlight.substring( nbStart, lengthNew - nbEnd );
// We can do the optimisation only if we havn't touch to span elements
if( newHtml.indexOf('<span') == -1 && newHtml.indexOf('</span') == -1
&& lastHtml.indexOf('<span') == -1 && lastHtml.indexOf('</span') == -1 )
{
var beginStr, nbOpendedSpan, nbClosedSpan, nbUnchangedChars, span, textNode;
doHtmlOpti = true;
beginStr = t.last_hightlighted_text.substr( 0, stay_begin.length + nbStart );
// fix special chars
newHtml = newHtml.replace( /</g, '<').replace( />/g, '>').replace( /&/g, '&');
nbOpendedSpan = beginStr.split('<span').length - 1;
nbClosedSpan = beginStr.split('</span').length - 1;
// retrieve the previously opened span (Add 1 for the first level span?)
span = t.content_highlight.getElementsByTagName('span')[ nbOpendedSpan ];
//--------[
// get the textNode to update
// if we're inside a span, we'll take the one that is opened (can be a parent of the current span)
parentSpan = span;
maxStartOffset = maxEndOffset = 0;
// it will be in the child of the root node
if( nbOpendedSpan == nbClosedSpan )
{
while( parentSpan.parentNode != t.content_highlight && parentSpan.parentNode.tagName != 'PRE' )
{
parentSpan = parentSpan.parentNode;
}
}
// get the last opened span
else
{
maxStartOffset = maxEndOffset = beginStr.length + 1;
// move to parent node for each closed span found after the lastest open span
nbClosed = beginStr.substr( Math.max( 0, beginStr.lastIndexOf( '<span', maxStartOffset - 1 ) ) ).split('</span').length - 1;
while( nbClosed > 0 )
{
nbClosed--;
parentSpan = parentSpan.parentNode;
}
// find the position of the last opended tag
while( parentSpan.parentNode != t.content_highlight && parentSpan.parentNode.tagName != 'PRE' && ( tmpMaxStartOffset = Math.max( 0, beginStr.lastIndexOf( '<span', maxStartOffset - 1 ) ) ) < ( tmpMaxEndOffset = Math.max( 0, beginStr.lastIndexOf( '</span', maxEndOffset - 1 ) ) ) )
{
maxStartOffset = tmpMaxStartOffset;
maxEndOffset = tmpMaxEndOffset;
}
}
// Note: maxEndOffset is no more used but maxStartOffset will be used
if( parentSpan.parentNode == t.content_highlight || parentSpan.parentNode.tagName == 'PRE' )
{
maxStartOffset = Math.max( 0, beginStr.indexOf( '<span' ) );
}
// find the matching text node (this will be one that will be at the end of the beginStr
if( maxStartOffset == beginStr.length )
{
nbSubSpanBefore = 0;
}
else
{
lastEndPos = Math.max( 0, beginStr.lastIndexOf( '>', maxStartOffset ) );
// count the number of sub spans
nbSubSpanBefore = beginStr.substr( lastEndPos ).split('<span').length-1;
}
// there is no sub-span before
if( nbSubSpanBefore == 0 )
{
textNode = parentSpan.firstChild;
}
// we need to find where is the text node modified
else
{
// take the last direct child (no sub-child)
lastSubSpan = parentSpan.getElementsByTagName('span')[ nbSubSpanBefore - 1 ];
while( lastSubSpan.parentNode != parentSpan )
{
lastSubSpan = lastSubSpan.parentNode;
}
// associate to next text node following the last sub span
if( lastSubSpan.nextSibling == null || lastSubSpan.nextSibling.nodeType != 3 )
{
textNode = document.createTextNode('');
lastSubSpan.parentNode.insertBefore( textNode, lastSubSpan.nextSibling );
}
else
{
textNode = lastSubSpan.nextSibling;
}
}
//--------]
//--------[
// update the textNode content
// number of caracters after the last opened of closed span
//nbUnchangedChars = ( lastIndex = beginStr.lastIndexOf( '>' ) ) == -1 ? beginStr.length : beginStr.length - ( lastIndex + 1 );
//nbUnchangedChars = ? beginStr.length : beginStr.substr( lastIndex + 1 ).replace( /</g, '<').replace( />/g, '>').replace( /&/g, '&').length;
if( ( lastIndex = beginStr.lastIndexOf( '>' ) ) == -1 )
{
nbUnchangedChars = beginStr.length;
}
else
{
nbUnchangedChars = beginStr.substr( lastIndex + 1 ).replace( /</g, '<').replace( />/g, '>').replace( /&/g, '&').length;
//nbUnchangedChars += beginStr.substr( ).replace( /&/g, '&').replace( /</g, '<').replace( />/g, '>').length - beginStr.length;
}
//alert( nbUnchangedChars );
// console.log( span, textNode, nbOpendedSpan,nbClosedSpan, span.nextSibling, textNode.length, nbUnchangedChars, lastHtml, lastHtml.length, newHtml, newHtml.length );
// alert( textNode.parentNode.className +'-'+ textNode.parentNode.tagName+"\n"+ textNode.data +"\n"+ nbUnchangedChars +"\n"+ lastHtml.length +"\n"+ newHtml +"\n"+ newHtml.length );
// console.log( nbUnchangedChars, lastIndex, beginStr.length, beginStr.replace(/&/g, '&'), lastHtml.length, '|', newHtml.replace( /\t/g, 't').replace( /\n/g, 'n').replace( /\r/g, 'r'), lastHtml.replace( /\t/g, 't').replace( /\n/g, 'n').replace( /\r/, 'r') );
// console.log( textNode.data.replace(/&/g, '&') );
// IE only manage \r for cariage return in textNode and not \n or \r\n
if( t.isIE )
{
nbUnchangedChars -= ( beginStr.substr( beginStr.length - nbUnchangedChars ).split("\n").length - 1 );
//alert( textNode.data.replace(/\r/g, '_r').replace(/\n/g, '_n'));
textNode.replaceData( nbUnchangedChars, lastHtml.replace(/\n/g, '').length, newHtml.replace(/\n/g, '') );
}
else
{
textNode.replaceData( nbUnchangedChars, lastHtml.length, newHtml );
}
//--------]
}
}
// an exception shouldn't occured but if replaceData failed at least it won't break everything
catch( e )
{
// throw e;
// console.log( e );
doHtmlOpti = false;
}
}
/*** END HTML update's optimisation ***/
// end test
// console.log( (TPS6-TPS5), (TPS5-TPS4), (TPS4-TPS3), (TPS3-TPS2), (TPS2-TPS1), _CPT );
// get the new highlight content
tpsAfterOpti2 = new Date().getTime();
hightlighted_text = stay_begin + updated_highlight + stay_end;
if( !doHtmlOpti )
{
// update the content of the highlight div by first updating a clone node (as there is no display in the same time for t node it's quite faster (5*))
var new_Obj= t.content_highlight.cloneNode(false);
if( ( t.isIE && t.isIE < 8 ) || ( t.isOpera && t.isOpera < 9.6 ) )
new_Obj.innerHTML= "<pre><span class='"+ t.settings["syntax"] +"'>" + hightlighted_text + "</span></pre>";
else
new_Obj.innerHTML= "<span class='"+ t.settings["syntax"] +"'>"+ hightlighted_text +"</span>";
t.content_highlight.parentNode.replaceChild(new_Obj, t.content_highlight);
t.content_highlight= new_Obj;
}
t.last_text_to_highlight= infos["full_text"];
t.last_hightlighted_text= hightlighted_text;
tps3=new Date().getTime();
if(t.settings["debug"]){
//lineNumber=tab_text.length;
//t.debug.value+=" \nNB char: "+_$("src").value.length+" Nb line: "+ lineNumber;
t.debug.value= "Tps optimisation "+(tps_end_opti-tps_start)
+" | tps reg exp: "+ (tpsAfterReg-tps_end_opti)
+" | tps opti HTML : "+ (tpsAfterOpti2-tpsAfterReg) + ' '+ ( doHtmlOpti ? 'yes' : 'no' )
+" | tps update highlight content: "+ (tps3-tpsAfterOpti2)
+" | tpsTotal: "+ (tps3-tps_start)
+ "("+tps3+")\n"+ debug_opti;
// t.debug.value+= "highlight\n"+hightlighted_text;*/
}
};
EditArea.prototype.resync_highlight= function(reload_now){
this.reload_highlight=true;
this.last_text_to_highlight="";
this.focus();
if(reload_now)
this.check_line_selection(false);
};