app/admin_files/wplink.js
/* global ajaxurl, tinymce, wpLinkL10n, tinyMCEPopup, setUserSetting, wpActiveEditor */
var wpLink;
(function($){
var inputs = {}, rivers = {}, ed, River, Query;
wpLink = {
timeToTriggerRiver: 150,
minRiverAJAXDuration: 200,
riverBottomThreshold: 5,
keySensitivity: 100,
lastSearch: '',
textarea: '',
init : function() {
inputs.dialog = $('#wp-link');
inputs.submit = $('#wp-link-submit');
// URL
inputs.url = $('#url-field');
inputs.nonce = $('#_ajax_linking_nonce');
// Secondary options
inputs.title = $('#link-title-field');
// Advanced Options
inputs.openInNewTab = $('#link-target-checkbox');
inputs.search = $('#search-field');
// Build Rivers
rivers.search = new River( $('#search-results') );
rivers.recent = new River( $('#most-recent-results') );
rivers.elements = $('.query-results', inputs.dialog);
// Bind event handlers
inputs.dialog.keydown( wpLink.keydown );
inputs.dialog.keyup( wpLink.keyup );
inputs.submit.click( function(e){
e.preventDefault();
wpLink.update();
});
$('#wp-link-cancel').click( function(e){
e.preventDefault();
wpLink.close();
});
$('#internal-toggle').click( wpLink.toggleInternalLinking );
rivers.elements.bind('river-select', wpLink.updateFields );
inputs.search.keyup( wpLink.searchInternalLinks );
inputs.dialog.bind('wpdialogrefresh', wpLink.refresh);
inputs.dialog.bind('wpdialogbeforeopen', wpLink.beforeOpen);
inputs.dialog.bind('wpdialogclose', wpLink.onClose);
},
beforeOpen : function() {
wpLink.range = null;
if ( ! wpLink.isMCE() && document.selection ) {
wpLink.textarea.focus();
wpLink.range = document.selection.createRange();
}
},
open : function() {
if ( !wpActiveEditor )
return;
this.textarea = $('#'+wpActiveEditor).get(0);
// Initialize the dialog if necessary (html mode).
if ( ! inputs.dialog.data('wpdialog') ) {
inputs.dialog.wpdialog({
title: wpLinkL10n.title,
width: 480,
height: 'auto',
modal: true,
dialogClass: 'wp-dialog'
});
}
inputs.dialog.wpdialog('open');
},
isMCE : function() {
return tinyMCEPopup && ( ed = tinyMCEPopup.editor ) && ! ed.isHidden();
},
refresh : function() {
// Refresh rivers (clear links, check visibility)
rivers.search.refresh();
rivers.recent.refresh();
if ( wpLink.isMCE() )
wpLink.mceRefresh();
else
wpLink.setDefaultValues();
// Focus the URL field and highlight its contents.
// If this is moved above the selection changes,
// IE will show a flashing cursor over the dialog.
inputs.url.focus()[0].select();
// Load the most recent results if this is the first time opening the panel.
if ( ! rivers.recent.ul.children().length )
rivers.recent.ajax();
},
mceRefresh : function() {
var e;
ed = tinyMCEPopup.editor;
tinyMCEPopup.restoreSelection();
// If link exists, select proper values.
if ( e = ed.dom.getParent(ed.selection.getNode(), 'A') ) {
// Set URL and description.
inputs.url.val( ed.dom.getAttrib(e, 'href') );
inputs.title.val( ed.dom.getAttrib(e, 'title') );
// Set open in new tab.
inputs.openInNewTab.prop('checked', ( '_blank' == ed.dom.getAttrib( e, 'target' ) ) );
// Update save prompt.
inputs.submit.val( wpLinkL10n.update );
// If there's no link, set the default values.
} else {
wpLink.setDefaultValues();
}
},
close : function() {
if ( wpLink.isMCE() )
tinyMCEPopup.close();
else
inputs.dialog.wpdialog('close');
},
onClose: function() {
if ( ! wpLink.isMCE() ) {
wpLink.textarea.focus();
if ( wpLink.range ) {
wpLink.range.moveToBookmark( wpLink.range.getBookmark() );
wpLink.range.select();
}
}
},
getAttrs : function() {
return {
href : inputs.url.val(),
title : inputs.title.val(),
target : inputs.openInNewTab.prop('checked') ? '_blank' : ''
};
},
update : function() {
if ( wpLink.isMCE() )
wpLink.mceUpdate();
else
wpLink.htmlUpdate();
},
htmlUpdate : function() {
var attrs, html, begin, end, cursor, selection,
textarea = wpLink.textarea;
if ( ! textarea )
return;
attrs = wpLink.getAttrs();
// If there's no href, return.
if ( ! attrs.href || attrs.href == 'http://' )
return;
// Build HTML
html = '<a href="' + attrs.href + '"';
if ( attrs.title )
html += ' title="' + attrs.title + '"';
if ( attrs.target )
html += ' target="' + attrs.target + '"';
html += '>';
// Insert HTML
if ( document.selection && wpLink.range ) {
// IE
// Note: If no text is selected, IE will not place the cursor
// inside the closing tag.
textarea.focus();
wpLink.range.text = html + wpLink.range.text + '</a>';
wpLink.range.moveToBookmark( wpLink.range.getBookmark() );
wpLink.range.select();
wpLink.range = null;
} else if ( typeof textarea.selectionStart !== 'undefined' ) {
// W3C
begin = textarea.selectionStart;
end = textarea.selectionEnd;
selection = textarea.value.substring( begin, end );
html = html + selection + '</a>';
cursor = begin + html.length;
// If no text is selected, place the cursor inside the closing tag.
if ( begin == end )
cursor -= '</a>'.length;
textarea.value = textarea.value.substring( 0, begin ) + html +
textarea.value.substring( end, textarea.value.length );
// Update cursor position
textarea.selectionStart = textarea.selectionEnd = cursor;
}
wpLink.close();
textarea.focus();
},
mceUpdate : function() {
var ed = tinyMCEPopup.editor,
attrs = wpLink.getAttrs(),
e, b;
tinyMCEPopup.restoreSelection();
e = ed.dom.getParent(ed.selection.getNode(), 'A');
// If the values are empty, unlink and return
if ( ! attrs.href || attrs.href == 'http://' ) {
if ( e ) {
b = ed.selection.getBookmark();
ed.dom.remove(e, 1);
ed.selection.moveToBookmark(b);
tinyMCEPopup.execCommand('mceEndUndoLevel');
wpLink.close();
}
return;
}
if (e == null) {
ed.getDoc().execCommand('unlink', false, null);
tinyMCEPopup.execCommand('mceInsertLink', false, '#mce_temp_url#', {skip_undo : 1});
tinymce.each(ed.dom.select('a'), function(n) {
if (ed.dom.getAttrib(n, 'href') == '#mce_temp_url#') {
e = n;
ed.dom.setAttribs(e, attrs);
}
});
// Sometimes WebKit lets a user create a link where
// they shouldn't be able to. In this case, CreateLink
// injects "#mce_temp_url#" into their content. Fix it.
if ( tinymce.isWebKit && $(e).text() == '#mce_temp_url#' ) {
ed.dom.remove(e);
e = null;
}
} else {
ed.dom.setAttribs(e, attrs);
}
// Move the caret if selection was not an image.
if ( e && (e.childNodes.length != 1 || e.firstChild.nodeName != 'IMG') ) {
ed.selection.select(e);
ed.selection.collapse(0);
tinyMCEPopup.storeSelection();
}
ed.execCommand('mceEndUndoLevel');
wpLink.close();
ed.focus();
},
updateFields : function( e, li, originalEvent ) {
inputs.url.val( li.children('.item-permalink').val() );
inputs.title.val( li.hasClass('no-title') ? '' : li.children('.item-title').text() );
if ( originalEvent && originalEvent.type == 'click' )
inputs.url.focus();
},
setDefaultValues : function() {
// Set URL and description to defaults.
// Leave the new tab setting as-is.
inputs.url.val('http://');
inputs.title.val('');
// Update save prompt.
inputs.submit.val( wpLinkL10n.save );
},
searchInternalLinks : function() {
var t = $(this), waiting,
search = t.val();
if ( search.length > 2 ) {
rivers.recent.hide();
rivers.search.show();
// Don't search if the keypress didn't change the title.
if ( wpLink.lastSearch == search )
return;
wpLink.lastSearch = search;
waiting = t.parent().find('.spinner').show();
rivers.search.change( search );
rivers.search.ajax( function(){ waiting.hide(); });
} else {
rivers.search.hide();
rivers.recent.show();
}
},
next : function() {
rivers.search.next();
rivers.recent.next();
},
prev : function() {
rivers.search.prev();
rivers.recent.prev();
},
keydown : function( event ) {
var fn, key = $.ui.keyCode;
if ( event.which !== key.UP && event.which !== key.DOWN ) {
return;
}
fn = event.which === key.UP ? 'prev' : 'next';
clearInterval( wpLink.keyInterval );
wpLink[ fn ]();
wpLink.keyInterval = setInterval( wpLink[ fn ], wpLink.keySensitivity );
event.preventDefault();
},
keyup: function( event ) {
var key = $.ui.keyCode;
if ( event.which === key.ESCAPE ) {
event.stopImmediatePropagation();
if ( ! $(document).triggerHandler( 'wp_CloseOnEscape', [{ event: event, what: 'wplink', cb: wpLink.close }] ) )
wpLink.close();
return false;
}
if ( event.which === key.UP || event.which === key.DOWN ) {
clearInterval( wpLink.keyInterval );
event.preventDefault();
}
},
delayedCallback : function( func, delay ) {
var timeoutTriggered, funcTriggered, funcArgs, funcContext;
if ( ! delay )
return func;
setTimeout( function() {
if ( funcTriggered )
return func.apply( funcContext, funcArgs );
// Otherwise, wait.
timeoutTriggered = true;
}, delay);
return function() {
if ( timeoutTriggered )
return func.apply( this, arguments );
// Otherwise, wait.
funcArgs = arguments;
funcContext = this;
funcTriggered = true;
};
},
toggleInternalLinking : function( event ) {
var panel = $('#search-panel'),
widget = inputs.dialog.wpdialog('widget'),
// We're about to toggle visibility; it's currently the opposite
visible = !panel.is(':visible'),
win = $(window);
$(this).toggleClass('toggle-arrow-active', visible);
inputs.dialog.height('auto');
panel.slideToggle( 300, function() {
setUserSetting('wplink', visible ? '1' : '0');
inputs[ visible ? 'search' : 'url' ].focus();
// Move the box if the box is now expanded, was opened in a collapsed state,
// and if it needs to be moved. (Judged by bottom not being positive or
// bottom being smaller than top.)
var scroll = win.scrollTop(),
top = widget.offset().top,
bottom = top + widget.outerHeight(),
diff = bottom - win.height();
if ( diff > scroll ) {
widget.animate({'top': diff < top ? top - diff : scroll }, 200);
}
});
event.preventDefault();
}
};
River = function( element, search ) {
var self = this;
this.element = element;
this.ul = element.children('ul');
this.waiting = element.find('.river-waiting');
this.change( search );
this.refresh();
element.scroll( function(){ self.maybeLoad(); });
element.delegate('li', 'click', function(e){ self.select( $(this), e ); });
};
$.extend( River.prototype, {
refresh: function() {
this.deselect();
this.visible = this.element.is(':visible');
},
show: function() {
if ( ! this.visible ) {
this.deselect();
this.element.show();
this.visible = true;
}
},
hide: function() {
this.element.hide();
this.visible = false;
},
// Selects a list item and triggers the river-select event.
select: function( li, event ) {
var liHeight, elHeight, liTop, elTop;
if ( li.hasClass('unselectable') || li == this.selected )
return;
this.deselect();
this.selected = li.addClass('selected');
// Make sure the element is visible
liHeight = li.outerHeight();
elHeight = this.element.height();
liTop = li.position().top;
elTop = this.element.scrollTop();
if ( liTop < 0 ) // Make first visible element
this.element.scrollTop( elTop + liTop );
else if ( liTop + liHeight > elHeight ) // Make last visible element
this.element.scrollTop( elTop + liTop - elHeight + liHeight );
// Trigger the river-select event
this.element.trigger('river-select', [ li, event, this ]);
},
deselect: function() {
if ( this.selected )
this.selected.removeClass('selected');
this.selected = false;
},
prev: function() {
if ( ! this.visible )
return;
var to;
if ( this.selected ) {
to = this.selected.prev('li');
if ( to.length )
this.select( to );
}
},
next: function() {
if ( ! this.visible )
return;
var to = this.selected ? this.selected.next('li') : $('li:not(.unselectable):first', this.element);
if ( to.length )
this.select( to );
},
ajax: function( callback ) {
var self = this,
delay = this.query.page == 1 ? 0 : wpLink.minRiverAJAXDuration,
response = wpLink.delayedCallback( function( results, params ) {
self.process( results, params );
if ( callback )
callback( results, params );
}, delay );
this.query.ajax( response );
},
change: function( search ) {
if ( this.query && this._search == search )
return;
this._search = search;
this.query = new Query( search );
this.element.scrollTop(0);
},
process: function( results, params ) {
var list = '', alt = true, classes = '',
firstPage = params.page == 1;
if ( !results ) {
if ( firstPage ) {
list += '<li class="unselectable"><span class="item-title"><em>' +
wpLinkL10n.noMatchesFound + '</em></span></li>';
}
} else {
$.each( results, function() {
classes = alt ? 'alternate' : '';
classes += this.title ? '' : ' no-title';
list += classes ? '<li class="' + classes + '">' : '<li>';
list += '<input type="hidden" class="item-permalink" value="' + this.permalink + '" />';
list += '<span class="item-title">';
list += this.title ? this.title : wpLinkL10n.noTitle;
list += '</span><span class="item-info">' + this.info + '</span></li>';
alt = ! alt;
});
}
this.ul[ firstPage ? 'html' : 'append' ]( list );
},
maybeLoad: function() {
var self = this,
el = this.element,
bottom = el.scrollTop() + el.height();
if ( ! this.query.ready() || bottom < this.ul.height() - wpLink.riverBottomThreshold )
return;
setTimeout(function() {
var newTop = el.scrollTop(),
newBottom = newTop + el.height();
if ( ! self.query.ready() || newBottom < self.ul.height() - wpLink.riverBottomThreshold )
return;
self.waiting.show();
el.scrollTop( newTop + self.waiting.outerHeight() );
self.ajax( function() { self.waiting.hide(); });
}, wpLink.timeToTriggerRiver );
}
});
Query = function( search ) {
this.page = 1;
this.allLoaded = false;
this.querying = false;
this.search = search;
};
$.extend( Query.prototype, {
ready: function() {
return !( this.querying || this.allLoaded );
},
ajax: function( callback ) {
var self = this,
query = {
action : 'wp-link-ajax',
page : this.page,
'_ajax_linking_nonce' : inputs.nonce.val()
};
if ( this.search )
query.search = this.search;
this.querying = true;
$.post( ajaxurl, query, function(r) {
self.page++;
self.querying = false;
self.allLoaded = !r;
callback( r, query );
}, 'json' );
}
});
$(document).ready( wpLink.init );
})(jQuery);