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FI" body;
FI"©/* update_html.js: Provide functions to update content on page with background responses from Umlaut. Used by Umlaut itself, as well as by third party callers.*/
(function($) {
function SectionTarget(config) {
//Add properties from config to ourself
$.extend(this, config);
//Defaults
if (this.selector == undefined)
this.selector = "#" + this.umlaut_section_id;
if (this.position == undefined)
this.position = "html";
}
//Callback default to no-op function please.
var noop = function() {};
SectionTarget.prototype.before_update = noop;
SectionTarget.prototype.after_update = noop;
SectionTarget.prototype.complete = noop;
SectionTarget.prototype.ensure_placement_destination = function() {
if ( this.selector == undefined) {
return null;
}
//Already have it cached?
if ( this.host_div_element ) {
return this.host_div_element;
}
var new_div = $('');
// Find the first thing matched by selector, and call the
// method specified in "action" string on it, giving it our
// HTML to replace. This works because our actions are
// all arguments that will take one method: html, before, after, append,
// prepend.
$(this.selector).eq(0)[ this.position ]( new_div );
//Cache for later
this.host_div_element = new_div;
return this.host_div_element;
};
// Define an object constructor on the global window object
// For our UmlautHtmlUpdater object.
function HtmlUpdater(umlaut_base, context_object) {
if (context_object == undefined)
context_object = "";
umlaut_base = umlaut_base.replace(/\/$/,'');
this.umlaut_uri = umlaut_base + '/resolve/partial_html_sections?umlaut.response_format=json&' + context_object;
this.section_targets = [];
this.add_section_target = function(config) {
this.section_targets.push( new SectionTarget(config) );
};
//default no-op call-backs
this.complete = function() {};
//Code for seeing if a URI is same origin or not borrowed from jQuery
this.is_remote_url = function(url) {
var regexp = /^(\w+:)?\/\/([^\/?#]+)/;
var parts = regexp.exec( url );
return (parts && (parts[1] && parts[1] !== location.protocol || parts[2] !== location.host));
}
this.update = function() {
// Need to capture because we won't have 'this' inside the ajax
// success handler.
var myself = this;
var dataType = this.is_remote_url( this.umlaut_uri ) ? "jsonp" : "json";
$.ajax({
url: myself.umlaut_uri,
dataType: dataType,
jsonp: "umlaut.jsonp",
error: function() {
$.error("Problem loading background elements.");
},
success: function(umlaut_response) {
for (var i = 0; i < myself.section_targets.length; i++) {
var section_target = myself.section_targets[i];
var umlaut_html_section = myself.find_umlaut_response_section(umlaut_response, section_target.umlaut_section_id);
if (umlaut_html_section == undefined) {
continue;
}
var count = null;
if (typeof umlaut_html_section.response_count != "undefined") {
count = parseInt(umlaut_html_section.response_count.value);
}
var existing_element = section_target.ensure_placement_destination();
var new_element = $('');
new_element.html(umlaut_html_section.html_content);
var should_continue = section_target.before_update(new_element, count, section_target);
if (should_continue != false) {
existing_element.replaceWith(new_element);
section_target.host_div_element = new_element;
new_element.show();
section_target.after_update(new_element, count, section_target)
}
}
//Do we need to update again?
if (umlaut_response.partial_html_sections.in_progress) {
//Fix our update URI to be the one umlaut suggests
//Except strip out the umlaut.jsonp parameter, jquery is
//going to add that back in as desired.
myself.umlaut_uri =
umlaut_response.partial_html_sections.in_progress.refresh_url.replace(/[?;&]umlaut\.jsonp=[^;&]+/, '');
var refresh_seconds =
umlaut_response.partial_html_sections.in_progress.requested_wait_seconds;
window.setTimeout(function() { myself.update(); }, refresh_seconds * 1000);
} else {
myself.complete();
for (var i = 0; i < myself.section_targets.length; i++) {
var section_target = myself.section_targets[i];
section_target.complete(section_target);
}
}
}
});
};
this.find_umlaut_response_section = function(response, id) {
return $.grep(response.partial_html_sections.html_section, function(section) {
return section.id == id;
})[0];
};
};
//Put it in a global object, leave space for other things in "Umlaut" later.
if (window.Umlaut == undefined)
window.Umlaut = new Object();
window.Umlaut.HtmlUpdater = HtmlUpdater;
})(jQuery);
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