/**
 * Software License Agreement (BSD License)
 * 
 * Copyright (c) 2008, Dave Hauenstein
 * All rights reserved.
 * 
 * Redistribution and use of this software in source and binary forms, with or
 * without modification, are permitted provided that the following conditions
 * are met:
 * 
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * 
 * - 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.
 * 
 * - Neither the name of Dave Hauenstein nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission of Dave Hauenstein
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
 */

/*
* @param String   options[url]                  url that post request will hit
* @param String   options[params]               paramters sent via the post request to the server; string; ex: name=dave&last_name=hauenstein
* @param String   options[field_type]           can be: text, textarea, select; default: text
* @param String   options[select_options]       this is a string seperated by commas for the dropdown options, if field_type is dropdown
* @param String   options[textarea_cols]        number of columns textarea will have, if field_type is textarea; default: 25
* @param String   options[textarea_rows]        number of rows textarea will have, if field_type is textarea; default: 10
* @param String   options[bg_over]              background color of editable elements on HOVER
* @param String   options[bg_out]               background color of editable elements on RESTORE from hover
* @param String   options[saving_text]          text to be used when server is saving information; default: 'Saving...'
* @param String   options[saving_image]         specify an image location instead of text while server is saving; default: uses saving text
* @param String   options[default_text]         text to show up if the element that has this functionality is empty
* @param String   options[select_text]          default text to show up in select box
* @param String   options[value_required]       if set to true, the element will not be saved unless a value is entered
* @param String   options[element_id]           name of parameter holding element_id; default: element_id
* @param String   options[update_value]         name of parameter holding update_value; default: update_value
* @param String   options[original_html]        name of parameter holding original_html; default: original_html
* @param String   options[save_button]          image button tag to use as "Save" button
* @param String   options[cancel_button]        image button tag to use as "Cancel" button
* @param String   options[show_buttons]         will show the buttons: cancel or save; will automatically cancel out the onBlur functionality
* @param String   options[on_blur]              what to do on blur: "save" or null; default: "save"; will be overridden if $param show_buttons is true
* @param Function options[callback]             call function instead of submitting to url
* @param Function options[success]              this function gets called if server responds with a success
* @param Function options[error]                this function gets called if server responds with an error
*/

jQuery.fn.editInPlace = function(options) {

    /* DEFINE THE DEFAULT SETTINGS, SWITCH THEM WITH THE OPTIONS USER PROVIDES */
    var settings = {
        url:                "",
        params:             "",
        field_type:         "text",
        select_options:     "",
        textarea_cols:      "25",
        textarea_rows:      "10",
        textwidth:          "100",
        bg_over:            "#cccccc",
        bg_out:             "transparent",
        saving_text:        "Saving...",
        saving_image:       "",
        default_text:       "(Click here to add text)",
        select_text:        "Choose new value",
        value_required:     null,
        element_id:         "element_id",
        update_value:       "update_value",
        original_html:      "original_html",
        save_button:        '<input type="submit" class="inplace_save" value="Save"/>',
        cancel_button:      '<input type="submit" class="inplace_cancel" value="Cancel"/>',
        show_buttons:       false,
        on_blur:            "save",
        callback:           null,
        success:            null,
        error:              function(request){
                                alert("Failed to save value: " + request.responseText || 'Unspecified Error');
                            }
    };

    if(options) {
        jQuery.extend(settings, options);
    }

    /* preload the loading icon if it exists */
    if(settings.saving_image != ""){
        var loading_image = new Image();
        loading_image.src = settings.saving_image;
    }

    /* THIS FUNCTION WILL TRIM WHITESPACE FROM BEFORE/AFTER A STRING */
    String.prototype.trim = function() {
        return this.replace(/^\s+/, '')
                             .replace(/\s+$/, '');
    };

    /* THIS FUNCTION WILL ESCAPE ANY HTML ENTITIES SO "Quoted Values" work */
    String.prototype.escape_html = function() {
        return this.replace(/&/g, "&amp;")
                             .replace(/</g, "&lt;")
                             .replace(/>/g, "&gt;")
                             .replace(/"/g, "&quot;");
  };

    /* CREATE THE INPLACE EDITOR */
    return this.each(function(){

        if(jQuery(this).html() == "") jQuery(this).html(settings.default_text);

        var editing = false;

        //save the original element - for change of scope
        var original_element = jQuery(this);

        var click_count = 0;

        jQuery(this)

        .mouseover(function(){
            jQuery(this).css("background-color", settings.bg_over);
        })

        .mouseout(function(){
            jQuery(this).css("background-color", settings.bg_out);
        })

        .click(function(){
            click_count++;

            if(!editing)
            {
                editing = true;
                
                //bg_img=jQuery(this).css("background-image");
                jQuery(this).css("background","transparent");
                pen_img=jQuery(this).children().filter(".penc_img").clone();
                
                jQuery(this).children().filter(".penc_img").remove();

                //save original text - for cancellation functionality
                var original_html = jQuery(this).html();
                
                var buttons_code  = (settings.show_buttons) ? settings.save_button + ' ' + settings.cancel_button : '';

                //if html is our default text, clear it out to prevent saving accidentally
                if (original_html == settings.default_text) jQuery(this).html('');

                original_html=original_html.replace(/<br>/g,"\n"); 
                //alert(jQuery(this).html().replace(/<br>/g,"\n").escape_html());
                //alert(jQuery(this).text());
                
                if (jQuery(this).attr('edtype'))
                {
                    settings.field_type=jQuery(this).attr('edtype');
                    settings.css_str='style="width:'+(jQuery(this).width())+'px;';
                    if (jQuery(this).height()>0)
                        settings.css_str+='height:'+(jQuery(this).height())+'px;';
                    settings.css_str+='border:0px;background-color:#dedede;margin:0px;padding:0px;font-family:arial;text-align:'+jQuery(this).css('text-align')+';font-weight:'+jQuery(this).css('font-weight')+';font-size:'+jQuery(this).css('font-size')+';"';
                    
                    //alert(settings.css_str);
                    //settings.css_str='style="width:'+(jQuery(this).css('width')+20)+'px;height:'+(jQuery(this).css('height')+0)+'px;"';
                }
                if (settings.field_type == "textarea")
                {
                    var use_field_type = '<textarea id="inplace_textarea" name="inplace_value" class="inplace_field" rows="' + settings.textarea_rows + '" cols="' + settings.textarea_cols + '" '+settings.css_str+'>' + jQuery(this).html().trim().replace(/(<br>)/g,"\n").escape_html() + '</textarea>';
                    
                }
                else if(settings.field_type == "text")
                {
                    var use_field_type = '<input type="text" name="inplace_value" class="inplace_field" value="' +
                                            jQuery(this).text().trim().escape_html() + '" '+settings.css_str+' />';
                }
                else if(settings.field_type == "select")
                {
                    var optionsArray = settings.select_options.split(',');
                    var use_field_type = '<select name="inplace_value" class="inplace_field"><option value="">' + settings.select_text + '</option>';
                        for(var i=0; i<optionsArray.length; i++){
                            var optionsValuesArray = optionsArray[i].split(':');
                            var use_value = optionsValuesArray[1] || optionsValuesArray[0];
                            var selected = use_value == original_html ? 'selected="selected" ' : '';
                            use_field_type += '<option ' + selected + 'value="' + use_value.trim().escape_html() + '">' + optionsValuesArray[0].trim().escape_html() + '</option>';
                        }
                        use_field_type += '</select>';
                }

                /* insert the new in place form after the element they click, then empty out the original element */
                jQuery(this).html('<form class="inplace_form" style="display: inline; margin: 0; padding: 0;">' + use_field_type + ' ' + buttons_code + '</form>');
                //$("#inplace_textarea").simpleautogrow();
                $("#inplace_textarea").autogrow();
                //$("#inplace_textarea").click();
                //$("#inplace_textarea").select();
            }/* END- if(!editing) -END */

            if(click_count == 1)
            {
                function cancelAction()
                {
                    editing = false;
                    click_count = 0;

                    /* put the original background color in */
                    original_element.css("background-color", settings.bg_out);

                    /* put back the original text */
                    original_element.html(original_html);

                    
                    return false;
                }

                function saveAction()
                {
                    /* put the original background color in */
                    //original_element.css("background-image", bg_img); 
                    //original_element.css("background-repeat", "no-repeat"); 
                    //original_element.css("background-position", "right bottom"); 
                    
                    original_element.css("background-color", settings.bg_out);
                    //original_element.append($("<img class='penc_img' src='/images/pencil.gif' border='0'>"));  

                    var this_elem = jQuery(this);

                    var new_html = (this_elem.is('form')) ? this_elem.children(0).val() : this_elem.parent().children(0).val();

                    /* set saving message */
                    if(settings.saving_image != ""){
                        var saving_message = '<img src="' + settings.saving_image + '" alt="Saving..." />';
                    } else {
                        var saving_message = settings.saving_text;
                    }

                    /* place the saving text/image in the original element */
                    original_element.html(saving_message);
                    



                    if(settings.params != ""){
                        settings.params = "&" + settings.params;
                    }

                    if(settings.callback) {
                        html = settings.callback(original_element.attr("id"), new_html, original_html, settings.params);
                        
                        editing = false;
                        click_count = 0;
                        //if (html) {
                            /* put the newly updated info into the original element */
                            html=html.replace(/\n/g,"<br>"); 
                            original_element.html(html || new_html);
                        //} else {
                            /* failure; put original back */
                            //alert("Failed to save value: " + new_html);
                            //original_element.html(original_html);
                        //}
                    } else if (settings.value_required && (new_html == "" || new_html == undefined)) {
                        editing = false;
                        click_count = 0;
                        original_element.html(original_html);
                        alert("Error: You must enter a value to save this field");
                    } else {
                        jQuery.ajax({
                            url: settings.url,
                            type: "POST",
                            data: settings.update_value + '=' + new_html + '&' + settings.element_id + '=' + original_element.attr("id") + settings.params + '&' + settings.original_html + '=' + original_html,
                            dataType: "html",
                            complete: function(request){
                                editing = false;
                                click_count = 0;
                            },
                            success: function(html){
                                /* if the text returned by the server is empty, */
                                /* put a marker as text in the original element */
                                var new_text = html || settings.default_text;

                                /* put the newly updated info into the original element */
                                original_element.html(new_text);
                                if (settings.success) settings.success(html, original_element);
                            },
                            error: function(request) {
                                original_element.html(original_html);
                                if (settings.error) settings.error(request, original_element);
                            }
                        });
                    }
                    
                    original_element.append(pen_img);                      

                    return false;
                }

                /* set the focus to the new input element */
                original_element.children("form").children(".inplace_field").focus().select();

                /* CLICK CANCEL BUTTON functionality */
                original_element.children("form").children(".inplace_cancel").click(cancelAction);

                /* CLICK SAVE BUTTON functionality */
                original_element.children("form").children(".inplace_save").click(saveAction);

                /* if cancel/save buttons should be shown, cancel blur functionality */
                if(!settings.show_buttons){
                    /* if on_blur is set to save, set the save funcion */
                    if(settings.on_blur == "save")
                        original_element.children("form").children(".inplace_field").blur(saveAction);
                    /* if on_blur is set to cancel, set the cancel funcion */
                    else
                        original_element.children("form").children(".inplace_field").blur(cancelAction);
                }

                /* hit esc key */
                $(document).keyup(function(event){
                    if (event.keyCode == 27) {
                        cancelAction();
                    }
                });

                original_element.children("form").submit(saveAction);

            }/* END- if(click_count == 1) -END */
        });
    });
};