/*
* Tabby jQuery plugin version 0.12
*
* Ted Devito - http://teddevito.com/demos/textarea.html
*
* Copyright (c) 2009 Ted Devito
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
// create closure
(function($) {
// plugin definition
$.fn.tabby = function(options) {
//debug(this);
// build main options before element iteration
var opts = $.extend({}, $.fn.tabby.defaults, options);
var pressed = $.fn.tabby.pressed;
// iterate and reformat each matched element
return this.each(function() {
$this = $(this);
// build element specific options
var options = $.meta ? $.extend({}, opts, $this.data()) : opts;
$this.bind('keydown',function (e) {
var kc = $.fn.tabby.catch_kc(e);
if (16 == kc) pressed.shft = true;
/*
because both CTRL+TAB and ALT+TAB default to an event (changing tab/window) that
will prevent js from capturing the keyup event, we'll set a timer on releasing them.
*/
if (17 == kc) {pressed.ctrl = true; setTimeout("$.fn.tabby.pressed.ctrl = false;",1000);}
if (18 == kc) {pressed.alt = true; setTimeout("$.fn.tabby.pressed.alt = false;",1000);}
if (9 == kc && !pressed.ctrl && !pressed.alt) {
e.preventDefault; // does not work in O9.63 ??
pressed.last = kc; setTimeout("$.fn.tabby.pressed.last = null;",0);
process_keypress ($(e.target).get(0), pressed.shft, options);
return false;
}
}).bind('keyup',function (e) {
if (16 == $.fn.tabby.catch_kc(e)) pressed.shft = false;
}).bind('blur',function (e) { // workaround for Opera -- http://www.webdeveloper.com/forum/showthread.php?p=806588
if (9 == pressed.last) $(e.target).one('focus',function (e) {pressed.last = null;}).get(0).focus();
});
});
};
// define and expose any extra methods
$.fn.tabby.catch_kc = function(e) { return e.keyCode ? e.keyCode : e.charCode ? e.charCode : e.which; };
$.fn.tabby.pressed = {shft : false, ctrl : false, alt : false, last: null};
// private function for debugging
function debug($obj) {
if (window.console && window.console.log)
window.console.log('textarea count: ' + $obj.size());
};
function process_keypress (o,shft,options) {
var scrollTo = o.scrollTop;
//var tabString = String.fromCharCode(9);
// gecko; o.setSelectionRange is only available when the text box has focus
if (o.setSelectionRange) gecko_tab (o, shft, options);
// ie; document.selection is always available
else if (document.selection) ie_tab (o, shft, options);
o.scrollTop = scrollTo;
}
// plugin defaults
$.fn.tabby.defaults = {tabString : String.fromCharCode(9)};
function gecko_tab (o, shft, options) {
var ss = o.selectionStart;
var es = o.selectionEnd;
// when there's no selection and we're just working with the caret, we'll add/remove the tabs at the caret, providing more control
if(ss == es) {
// SHIFT+TAB
if (shft) {
// check to the left of the caret first
if ("\t" == o.value.substring(ss-options.tabString.length, ss)) {
o.value = o.value.substring(0, ss-options.tabString.length) + o.value.substring(ss); // put it back together omitting one character to the left
o.focus();
o.setSelectionRange(ss - options.tabString.length, ss - options.tabString.length);
}
// then check to the right of the caret
else if ("\t" == o.value.substring(ss, ss + options.tabString.length)) {
o.value = o.value.substring(0, ss) + o.value.substring(ss + options.tabString.length); // put it back together omitting one character to the right
o.focus();
o.setSelectionRange(ss,ss);
}
}
// TAB
else {
o.value = o.value.substring(0, ss) + options.tabString + o.value.substring(ss);
o.focus();
o.setSelectionRange(ss + options.tabString.length, ss + options.tabString.length);
}
}
// selections will always add/remove tabs from the start of the line
else {
// split the textarea up into lines and figure out which lines are included in the selection
var lines = o.value.split("\n");
var indices = new Array();
var sl = 0; // start of the line
var el = 0; // end of the line
var sel = false;
for (var i in lines) {
el = sl + lines[i].length;
indices.push({start: sl, end: el, selected: (sl <= ss && el > ss) || (el >= es && sl < es) || (sl > ss && el < es)});
sl = el + 1;// for "\n"
}
// walk through the array of lines (indices) and add tabs where appropriate
var modifier = 0;
for (var i in indices) {
if (indices[i].selected) {
var pos = indices[i].start + modifier; // adjust for tabs already inserted/removed
// SHIFT+TAB
if (shft && options.tabString == o.value.substring(pos,pos+options.tabString.length)) { // only SHIFT+TAB if there's a tab at the start of the line
o.value = o.value.substring(0,pos) + o.value.substring(pos + options.tabString.length); // omit the tabstring to the right
modifier -= options.tabString.length;
}
// TAB
else if (!shft) {
o.value = o.value.substring(0,pos) + options.tabString + o.value.substring(pos); // insert the tabstring
modifier += options.tabString.length;
}
}
}
o.focus();
var ns = ss + ((modifier > 0) ? options.tabString.length : (modifier < 0) ? -options.tabString.length : 0);
var ne = es + modifier;
o.setSelectionRange(ns,ne);
}
}
function ie_tab (o, shft, options) {
var range = document.selection.createRange();
if (o == range.parentElement()) {
// when there's no selection and we're just working with the caret, we'll add/remove the tabs at the caret, providing more control
if ('' == range.text) {
// SHIFT+TAB
if (shft) {
var bookmark = range.getBookmark();
//first try to the left by moving opening up our empty range to the left
range.moveStart('character', -options.tabString.length);
if (options.tabString == range.text) {
range.text = '';
} else {
// if that didn't work then reset the range and try opening it to the right
range.moveToBookmark(bookmark);
range.moveEnd('character', options.tabString.length);
if (options.tabString == range.text)
range.text = '';
}
// move the pointer to the start of them empty range and select it
range.collapse(true);
range.select();
}
else {
// very simple here. just insert the tab into the range and put the pointer at the end
range.text = options.tabString;
range.collapse(false);
range.select();
}
}
// selections will always add/remove tabs from the start of the line
else {
var selection_text = range.text;
var selection_len = selection_text.length;
var selection_arr = selection_text.split("\r\n");
var before_range = document.body.createTextRange();
before_range.moveToElementText(o);
before_range.setEndPoint("EndToStart", range);
var before_text = before_range.text;
var before_arr = before_text.split("\r\n");
var before_len = before_text.length; // - before_arr.length + 1;
var after_range = document.body.createTextRange();
after_range.moveToElementText(o);
after_range.setEndPoint("StartToEnd", range);
var after_text = after_range.text; // we can accurately calculate distance to the end because we're not worried about MSIE trimming a \r\n
var end_range = document.body.createTextRange();
end_range.moveToElementText(o);
end_range.setEndPoint("StartToEnd", before_range);
var end_text = end_range.text; // we can accurately calculate distance to the end because we're not worried about MSIE trimming a \r\n
var check_html = $(o).html();
$("#r3").text(before_len + " + " + selection_len + " + " + after_text.length + " = " + check_html.length);
if((before_len + end_text.length) < check_html.length) {
before_arr.push("");
before_len += 2; // for the \r\n that was trimmed
if (shft && options.tabString == selection_arr[0].substring(0,options.tabString.length))
selection_arr[0] = selection_arr[0].substring(options.tabString.length);
else if (!shft) selection_arr[0] = options.tabString + selection_arr[0];
} else {
if (shft && options.tabString == before_arr[before_arr.length-1].substring(0,options.tabString.length))
before_arr[before_arr.length-1] = before_arr[before_arr.length-1].substring(options.tabString.length);
else if (!shft) before_arr[before_arr.length-1] = options.tabString + before_arr[before_arr.length-1];
}
for (var i = 1; i < selection_arr.length; i++) {
if (shft && options.tabString == selection_arr[i].substring(0,options.tabString.length))
selection_arr[i] = selection_arr[i].substring(options.tabString.length);
else if (!shft) selection_arr[i] = options.tabString + selection_arr[i];
}
if (1 == before_arr.length && 0 == before_len) {
if (shft && options.tabString == selection_arr[0].substring(0,options.tabString.length))
selection_arr[0] = selection_arr[0].substring(options.tabString.length);
else if (!shft) selection_arr[0] = options.tabString + selection_arr[0];
}
if ((before_len + selection_len + after_text.length) < check_html.length) {
selection_arr.push("");
selection_len += 2; // for the \r\n that was trimmed
}
before_range.text = before_arr.join("\r\n");
range.text = selection_arr.join("\r\n");
var new_range = document.body.createTextRange();
new_range.moveToElementText(o);
if (0 < before_len) new_range.setEndPoint("StartToEnd", before_range);
else new_range.setEndPoint("StartToStart", before_range);
new_range.setEndPoint("EndToEnd", range);
new_range.select();
}
}
}
// end of closure
})(jQuery);