115 lines
3.5 KiB
JavaScript
115 lines
3.5 KiB
JavaScript
/**
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* NOTE: MARK MOSER EDITED COPY. DO NOT USE BOWER.
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*
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* jQuery Lined Textarea Plugin
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* http://alan.blog-city.com/jquerylinedtextarea.htm
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*
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* Copyright (c) 2010 Alan Williamson
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*
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* Version:
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* $Id: jquery-linedtextarea.js 464 2010-01-08 10:36:33Z alan $
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*
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* Released under the MIT License:
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* http://www.opensource.org/licenses/mit-license.php
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*
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* Usage:
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* Displays a line number count column to the left of the textarea
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*
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* Class up your textarea with a given class, or target it directly
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* with JQuery Selectors
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*
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* $(".lined").linedtextarea({
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* selectedLine: 10,
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* selectedClass: 'lineselect'
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* });
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*
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* History:
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* - 2010.01.08: Fixed a Google Chrome layout problem
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* - 2010.01.07: Refactored code for speed/readability; Fixed horizontal sizing
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* - 2010.01.06: Initial Release
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*
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*/
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(function($) {
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$.fn.linedtextarea = function(options) {
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// Get the Options
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var opts = $.extend({}, $.fn.linedtextarea.defaults, options);
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/*
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* Helper function to make sure the line numbers are always
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* kept up to the current system
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*/
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var fillOutLines = function(codeLines, h, lineNo){
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while ( (codeLines.height() - h ) <= 0 ){
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if ( lineNo == opts.selectedLine )
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codeLines.append("<div class='lineno lineselect'>" + lineNo + "</div>");
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else
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codeLines.append("<div class='lineno'>" + lineNo + "</div>");
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lineNo++;
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}
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return lineNo;
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};
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/*
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* Iterate through each of the elements are to be applied to
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*/
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return this.each(function() {
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var lineNo = 1;
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var textarea = $(this);
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/* Turn off the wrapping of as we don't want to screw up the line numbers */
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textarea.attr("wrap", "off");
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textarea.css({resize:'none'});
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// var originalTextAreaWidth = textarea.outerWidth();
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/* Wrap the text area in the elements we need */
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textarea.wrap("<div class='linedtextarea'></div>");
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var linedTextAreaDiv = textarea.parent().wrap("<div class='linedwrap'></div>");
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var linedWrapDiv = linedTextAreaDiv.parent();
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linedWrapDiv.prepend("<div class='lines'></div>");
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var linesDiv = linedWrapDiv.find(".lines");
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linesDiv.height( textarea.height() + 4 );
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/* Draw the number bar; filling it out where necessary */
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linesDiv.append( "<div class='codelines'></div>" );
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var codeLinesDiv = linesDiv.find(".codelines");
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lineNo = fillOutLines( codeLinesDiv, linesDiv.height(), 1 );
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/* Move the textarea to the selected line */
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if ( opts.selectedLine != -1 && !isNaN(opts.selectedLine) ){
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var fontSize = parseInt( textarea.height() / (lineNo-2) );
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var position = parseInt( fontSize * opts.selectedLine ) - (textarea.height()/2);
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textarea[0].scrollTop = position;
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}
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/* React to the scroll event */
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textarea.scroll( function(){
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var domTextArea = $(this)[0];
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var scrollTop = domTextArea.scrollTop;
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var clientHeight = domTextArea.clientHeight;
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codeLinesDiv.css( {'margin-top': (-1*scrollTop) + "px"} );
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lineNo = fillOutLines( codeLinesDiv, scrollTop + clientHeight, lineNo );
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});
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/* Should the textarea get resized outside of our control */
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textarea.resize( function(){
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var domTextArea = $(this)[0];
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linesDiv.height( domTextArea.clientHeight + 4 );
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});
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});
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};
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// default options
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$.fn.linedtextarea.defaults = {
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selectedLine: -1,
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selectedClass: 'lineselect'
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};
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})(jQuery);
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