127 lines
4.0 KiB
JavaScript
Executable File
127 lines
4.0 KiB
JavaScript
Executable File
/**
|
|
* jQuery Lined Textarea Plugin
|
|
* http://alan.blog-city.com/jquerylinedtextarea.htm
|
|
*
|
|
* Copyright (c) 2010 Alan Williamson
|
|
*
|
|
* Version:
|
|
* $Id: jquery-linedtextarea.js 464 2010-01-08 10:36:33Z alan $
|
|
*
|
|
* Released under the MIT License:
|
|
* http://www.opensource.org/licenses/mit-license.php
|
|
*
|
|
* Usage:
|
|
* Displays a line number count column to the left of the textarea
|
|
*
|
|
* Class up your textarea with a given class, or target it directly
|
|
* with JQuery Selectors
|
|
*
|
|
* $(".lined").linedtextarea({
|
|
* selectedLine: 10,
|
|
* selectedClass: 'lineselect'
|
|
* });
|
|
*
|
|
* History:
|
|
* - 2010.01.08: Fixed a Google Chrome layout problem
|
|
* - 2010.01.07: Refactored code for speed/readability; Fixed horizontal sizing
|
|
* - 2010.01.06: Initial Release
|
|
*
|
|
*/
|
|
(function($) {
|
|
|
|
$.fn.linedtextarea = function(options) {
|
|
|
|
// Get the Options
|
|
var opts = $.extend({}, $.fn.linedtextarea.defaults, options);
|
|
|
|
|
|
/*
|
|
* Helper function to make sure the line numbers are always
|
|
* kept up to the current system
|
|
*/
|
|
var fillOutLines = function(codeLines, h, lineNo){
|
|
while ( (codeLines.height() - h ) <= 0 ){
|
|
if ( lineNo == opts.selectedLine )
|
|
codeLines.append("<div class='lineno lineselect'>" + lineNo + "</div>");
|
|
else
|
|
codeLines.append("<div class='lineno'>" + lineNo + "</div>");
|
|
|
|
lineNo++;
|
|
}
|
|
return lineNo;
|
|
};
|
|
|
|
|
|
/*
|
|
* Iterate through each of the elements are to be applied to
|
|
*/
|
|
return this.each(function() {
|
|
var lineNo = 1;
|
|
var textarea = $(this);
|
|
|
|
/* Turn off the wrapping of as we don't want to screw up the line numbers */
|
|
textarea.attr("wrap", "off");
|
|
textarea.css({resize:'none'});
|
|
var originalTextAreaWidth = textarea.outerWidth();
|
|
|
|
/* Wrap the text area in the elements we need */
|
|
textarea.wrap("<div class='linedtextarea'></div>");
|
|
var linedTextAreaDiv = textarea.parent().wrap("<div class='linedwrap' style='width:" + originalTextAreaWidth + "px'></div>");
|
|
var linedWrapDiv = linedTextAreaDiv.parent();
|
|
|
|
linedWrapDiv.prepend("<div class='lines' style='width:50px'></div>");
|
|
|
|
var linesDiv = linedWrapDiv.find(".lines");
|
|
linesDiv.height( textarea.height() + 6 );
|
|
|
|
|
|
/* Draw the number bar; filling it out where necessary */
|
|
linesDiv.append( "<div class='codelines'></div>" );
|
|
var codeLinesDiv = linesDiv.find(".codelines");
|
|
lineNo = fillOutLines( codeLinesDiv, linesDiv.height(), 1 );
|
|
|
|
/* Move the textarea to the selected line */
|
|
if ( opts.selectedLine != -1 && !isNaN(opts.selectedLine) ){
|
|
var fontSize = parseInt( textarea.height() / (lineNo-2) );
|
|
var position = parseInt( fontSize * opts.selectedLine ) - (textarea.height()/2);
|
|
textarea[0].scrollTop = position;
|
|
}
|
|
|
|
|
|
/* Set the width */
|
|
var sidebarWidth = linesDiv.outerWidth();
|
|
var paddingHorizontal = parseInt( linedWrapDiv.css("border-left-width") ) + parseInt( linedWrapDiv.css("border-right-width") ) + parseInt( linedWrapDiv.css("padding-left") ) + parseInt( linedWrapDiv.css("padding-right") );
|
|
var linedWrapDivNewWidth = originalTextAreaWidth - paddingHorizontal;
|
|
var textareaNewWidth = originalTextAreaWidth - sidebarWidth - paddingHorizontal - 20;
|
|
|
|
textarea.width( textareaNewWidth );
|
|
linedWrapDiv.width( linedWrapDivNewWidth );
|
|
|
|
|
|
|
|
/* React to the scroll event */
|
|
textarea.scroll( function(tn){
|
|
var domTextArea = $(this)[0];
|
|
var scrollTop = domTextArea.scrollTop;
|
|
var clientHeight = domTextArea.clientHeight;
|
|
codeLinesDiv.css( {'margin-top': (-1*scrollTop) + "px"} );
|
|
lineNo = fillOutLines( codeLinesDiv, scrollTop + clientHeight, lineNo );
|
|
});
|
|
|
|
|
|
/* Should the textarea get resized outside of our control */
|
|
textarea.resize( function(tn){
|
|
var domTextArea = $(this)[0];
|
|
linesDiv.height( domTextArea.clientHeight + 6 );
|
|
});
|
|
|
|
});
|
|
};
|
|
|
|
// default options
|
|
$.fn.linedtextarea.defaults = {
|
|
selectedLine: -1,
|
|
selectedClass: 'lineselect'
|
|
};
|
|
})(jQuery);
|