1 var wpLink;

     2 

     3 (function($){

     4 	var inputs = {}, rivers = {}, ed, River, Query;

     5 

     6 	wpLink = {

     7 		timeToTriggerRiver: 150,

     8 		minRiverAJAXDuration: 200,

     9 		riverBottomThreshold: 5,

    10 		keySensitivity: 100,

    11 		lastSearch: '',

    12 		textarea: '',

    13 

    14 		init : function() {

    15 			inputs.dialog = $('#wp-link');

    16 			inputs.submit = $('#wp-link-submit');

    17 			// URL

    18 			inputs.url = $('#url-field');

    19 			inputs.nonce = $('#_ajax_linking_nonce');

    20 			// Secondary options

    21 			inputs.title = $('#link-title-field');

    22 			// Advanced Options

    23 			inputs.openInNewTab = $('#link-target-checkbox');

    24 			inputs.search = $('#search-field');

    25 			// Build Rivers

    26 			rivers.search = new River( $('#search-results') );

    27 			rivers.recent = new River( $('#most-recent-results') );

    28 			rivers.elements = $('.query-results', inputs.dialog);

    29 

    30 			// Bind event handlers

    31 			inputs.dialog.keydown( wpLink.keydown );

    32 			inputs.dialog.keyup( wpLink.keyup );

    33 			inputs.submit.click( function(e){

    34 				e.preventDefault();

    35 				wpLink.update();

    36 			});

    37 			$('#wp-link-cancel').click( function(e){

    38 				e.preventDefault();

    39 				wpLink.close();

    40 			});

    41 			$('#internal-toggle').click( wpLink.toggleInternalLinking );

    42 

    43 			rivers.elements.bind('river-select', wpLink.updateFields );

    44 

    45 			inputs.search.keyup( wpLink.searchInternalLinks );

    46 

    47 			inputs.dialog.bind('wpdialogrefresh', wpLink.refresh);

    48 			inputs.dialog.bind('wpdialogbeforeopen', wpLink.beforeOpen);

    49 			inputs.dialog.bind('wpdialogclose', wpLink.onClose);

    50 		},

    51 

    52 		beforeOpen : function() {

    53 			wpLink.range = null;

    54 

    55 			if ( ! wpLink.isMCE() && document.selection ) {

    56 				wpLink.textarea.focus();

    57 				wpLink.range = document.selection.createRange();

    58 			}

    59 		},

    60 

    61 		open : function() {

    62 			if ( !wpActiveEditor )

    63 				return;

    64 

    65 			this.textarea = $('#'+wpActiveEditor).get(0);

    66 

    67 			// Initialize the dialog if necessary (html mode).

    68 			if ( ! inputs.dialog.data('wpdialog') ) {

    69 				inputs.dialog.wpdialog({

    70 					title: wpLinkL10n.title,

    71 					width: 480,

    72 					height: 'auto',

    73 					modal: true,

    74 					dialogClass: 'wp-dialog'

    75 				});

    76 			}

    77 

    78 			inputs.dialog.wpdialog('open');

    79 		},

    80 

    81 		isMCE : function() {

    82 			return tinyMCEPopup && ( ed = tinyMCEPopup.editor ) && ! ed.isHidden();

    83 		},

    84 

    85 		refresh : function() {

    86 			// Refresh rivers (clear links, check visibility)

    87 			rivers.search.refresh();

    88 			rivers.recent.refresh();

    89 

    90 			if ( wpLink.isMCE() )

    91 				wpLink.mceRefresh();

    92 			else

    93 				wpLink.setDefaultValues();

    94 

    95 			// Focus the URL field and highlight its contents.

    96 			//     If this is moved above the selection changes,

    97 			//     IE will show a flashing cursor over the dialog.

    98 			inputs.url.focus()[0].select();

    99 			// Load the most recent results if this is the first time opening the panel.

   100 			if ( ! rivers.recent.ul.children().length )

   101 				rivers.recent.ajax();

   102 		},

   103 

   104 		mceRefresh : function() {

   105 			var e;

   106 			ed = tinyMCEPopup.editor;

   107 

   108 			tinyMCEPopup.restoreSelection();

   109 

   110 			// If link exists, select proper values.

   111 			if ( e = ed.dom.getParent(ed.selection.getNode(), 'A') ) {

   112 				// Set URL and description.

   113 				inputs.url.val( ed.dom.getAttrib(e, 'href') );

   114 				inputs.title.val( ed.dom.getAttrib(e, 'title') );

   115 				// Set open in new tab.

   116 				inputs.openInNewTab.prop('checked', ( "_blank" == ed.dom.getAttrib( e, 'target' ) ) );

   117 				// Update save prompt.

   118 				inputs.submit.val( wpLinkL10n.update );

   119 

   120 			// If there's no link, set the default values.

   121 			} else {

   122 				wpLink.setDefaultValues();

   123 			}

   124 		},

   125 

   126 		close : function() {

   127 			if ( wpLink.isMCE() )

   128 				tinyMCEPopup.close();

   129 			else

   130 				inputs.dialog.wpdialog('close');

   131 		},

   132 

   133 		onClose: function() {

   134 			if ( ! wpLink.isMCE() ) {

   135 				wpLink.textarea.focus();

   136 				if ( wpLink.range ) {

   137 					wpLink.range.moveToBookmark( wpLink.range.getBookmark() );

   138 					wpLink.range.select();

   139 				}

   140 			}

   141 		},

   142 

   143 		getAttrs : function() {

   144 			return {

   145 				href : inputs.url.val(),

   146 				title : inputs.title.val(),

   147 				target : inputs.openInNewTab.prop('checked') ? '_blank' : ''

   148 			};

   149 		},

   150 

   151 		update : function() {

   152 			if ( wpLink.isMCE() )

   153 				wpLink.mceUpdate();

   154 			else

   155 				wpLink.htmlUpdate();

   156 		},

   157 

   158 		htmlUpdate : function() {

   159 			var attrs, html, begin, end, cursor,

   160 				textarea = wpLink.textarea;

   161 

   162 			if ( ! textarea )

   163 				return;

   164 

   165 			attrs = wpLink.getAttrs();

   166 

   167 			// If there's no href, return.

   168 			if ( ! attrs.href || attrs.href == 'http://' )

   169 				return;

   170 

   171 			// Build HTML

   172 			html = '<a href="' + attrs.href + '"';

   173 

   174 			if ( attrs.title )

   175 				html += ' title="' + attrs.title + '"';

   176 			if ( attrs.target )

   177 				html += ' target="' + attrs.target + '"';

   178 

   179 			html += '>';

   180 

   181 			// Insert HTML

   182 			if ( document.selection && wpLink.range ) {

   183 				// IE

   184 				// Note: If no text is selected, IE will not place the cursor

   185 				//       inside the closing tag.

   186 				textarea.focus();

   187 				wpLink.range.text = html + wpLink.range.text + '</a>';

   188 				wpLink.range.moveToBookmark( wpLink.range.getBookmark() );

   189 				wpLink.range.select();

   190 

   191 				wpLink.range = null;

   192 			} else if ( typeof textarea.selectionStart !== 'undefined' ) {

   193 				// W3C

   194 				begin       = textarea.selectionStart;

   195 				end         = textarea.selectionEnd;

   196 				selection   = textarea.value.substring( begin, end );

   197 				html        = html + selection + '</a>';

   198 				cursor      = begin + html.length;

   199 

   200 				// If no next is selected, place the cursor inside the closing tag.

   201 				if ( begin == end )

   202 					cursor -= '</a>'.length;

   203 

   204 				textarea.value = textarea.value.substring( 0, begin )

   205 				               + html

   206 				               + textarea.value.substring( end, textarea.value.length );

   207 

   208 				// Update cursor position

   209 				textarea.selectionStart = textarea.selectionEnd = cursor;

   210 			}

   211 

   212 			wpLink.close();

   213 			textarea.focus();

   214 		},

   215 

   216 		mceUpdate : function() {

   217 			var ed = tinyMCEPopup.editor,

   218 				attrs = wpLink.getAttrs(),

   219 				e, b;

   220 

   221 			tinyMCEPopup.restoreSelection();

   222 			e = ed.dom.getParent(ed.selection.getNode(), 'A');

   223 

   224 			// If the values are empty, unlink and return

   225 			if ( ! attrs.href || attrs.href == 'http://' ) {

   226 				if ( e ) {

   227 					b = ed.selection.getBookmark();

   228 					ed.dom.remove(e, 1);

   229 					ed.selection.moveToBookmark(b);

   230 					tinyMCEPopup.execCommand("mceEndUndoLevel");

   231 					wpLink.close();

   232 				}

   233 				return;

   234 			}

   235 

   236 			if (e == null) {

   237 				ed.getDoc().execCommand("unlink", false, null);

   238 				tinyMCEPopup.execCommand("mceInsertLink", false, "#mce_temp_url#", {skip_undo : 1});

   239 

   240 				tinymce.each(ed.dom.select("a"), function(n) {

   241 					if (ed.dom.getAttrib(n, 'href') == '#mce_temp_url#') {

   242 						e = n;

   243 						ed.dom.setAttribs(e, attrs);

   244 					}

   245 				});

   246 

   247 				// Sometimes WebKit lets a user create a link where

   248 				// they shouldn't be able to. In this case, CreateLink

   249 				// injects "#mce_temp_url#" into their content. Fix it.

   250 				if ( tinymce.isWebKit && $(e).text() == '#mce_temp_url#' ) {

   251 					ed.dom.remove(e);

   252 					e = null;

   253 				}

   254 			} else {

   255 				ed.dom.setAttribs(e, attrs);

   256 			}

   257 

   258 			// Move the caret if selection was not an image.

   259 			if ( e && (e.childNodes.length != 1 || e.firstChild.nodeName != 'IMG') ) {

   260 				ed.selection.select(e);

   261 				ed.selection.collapse(0);

   262 				tinyMCEPopup.storeSelection();

   263 			}

   264 

   265 			ed.execCommand("mceEndUndoLevel");

   266 			wpLink.close();

   267 			ed.focus();

   268 		},

   269 

   270 		updateFields : function( e, li, originalEvent ) {

   271 			inputs.url.val( li.children('.item-permalink').val() );

   272 			inputs.title.val( li.hasClass('no-title') ? '' : li.children('.item-title').text() );

   273 			if ( originalEvent && originalEvent.type == "click" )

   274 				inputs.url.focus();

   275 		},

   276 		setDefaultValues : function() {

   277 			// Set URL and description to defaults.

   278 			// Leave the new tab setting as-is.

   279 			inputs.url.val('http://');

   280 			inputs.title.val('');

   281 

   282 			// Update save prompt.

   283 			inputs.submit.val( wpLinkL10n.save );

   284 		},

   285 

   286 		searchInternalLinks : function() {

   287 			var t = $(this), waiting,

   288 				search = t.val();

   289 

   290 			if ( search.length > 2 ) {

   291 				rivers.recent.hide();

   292 				rivers.search.show();

   293 

   294 				// Don't search if the keypress didn't change the title.

   295 				if ( wpLink.lastSearch == search )

   296 					return;

   297 

   298 				wpLink.lastSearch = search;

   299 				waiting = t.parent().find('.spinner').show();

   300 

   301 				rivers.search.change( search );

   302 				rivers.search.ajax( function(){ waiting.hide(); });

   303 			} else {

   304 				rivers.search.hide();

   305 				rivers.recent.show();

   306 			}

   307 		},

   308 

   309 		next : function() {

   310 			rivers.search.next();

   311 			rivers.recent.next();

   312 		},

   313 		prev : function() {

   314 			rivers.search.prev();

   315 			rivers.recent.prev();

   316 		},

   317 

   318 		keydown : function( event ) {

   319 			var fn, key = $.ui.keyCode;

   320 

   321 			switch( event.which ) {

   322 				case key.UP:

   323 					fn = 'prev';

   324 				case key.DOWN:

   325 					fn = fn || 'next';

   326 					clearInterval( wpLink.keyInterval );

   327 					wpLink[ fn ]();

   328 					wpLink.keyInterval = setInterval( wpLink[ fn ], wpLink.keySensitivity );

   329 					break;

   330 				default:

   331 					return;

   332 			}

   333 			event.preventDefault();

   334 		},

   335 		keyup: function( event ) {

   336 			var key = $.ui.keyCode;

   337 

   338 			switch( event.which ) {

   339 				case key.ESCAPE:

   340 					event.stopImmediatePropagation();

   341 					if ( ! $(document).triggerHandler( 'wp_CloseOnEscape', [{ event: event, what: 'wplink', cb: wpLink.close }] ) )

   342 						wpLink.close();

   343 

   344 					return false;

   345 					break;

   346 				case key.UP:

   347 				case key.DOWN:

   348 					clearInterval( wpLink.keyInterval );

   349 					break;

   350 				default:

   351 					return;

   352 			}

   353 			event.preventDefault();

   354 		},

   355 

   356 		delayedCallback : function( func, delay ) {

   357 			var timeoutTriggered, funcTriggered, funcArgs, funcContext;

   358 

   359 			if ( ! delay )

   360 				return func;

   361 

   362 			setTimeout( function() {

   363 				if ( funcTriggered )

   364 					return func.apply( funcContext, funcArgs );

   365 				// Otherwise, wait.

   366 				timeoutTriggered = true;

   367 			}, delay);

   368 

   369 			return function() {

   370 				if ( timeoutTriggered )

   371 					return func.apply( this, arguments );

   372 				// Otherwise, wait.

   373 				funcArgs = arguments;

   374 				funcContext = this;

   375 				funcTriggered = true;

   376 			};

   377 		},

   378 

   379 		toggleInternalLinking : function( event ) {

   380 			var panel = $('#search-panel'),

   381 				widget = inputs.dialog.wpdialog('widget'),

   382 				// We're about to toggle visibility; it's currently the opposite

   383 				visible = !panel.is(':visible'),

   384 				win = $(window);

   385 

   386 			$(this).toggleClass('toggle-arrow-active', visible);

   387 

   388 			inputs.dialog.height('auto');

   389 			panel.slideToggle( 300, function() {

   390 				setUserSetting('wplink', visible ? '1' : '0');

   391 				inputs[ visible ? 'search' : 'url' ].focus();

   392 

   393 				// Move the box if the box is now expanded, was opened in a collapsed state,

   394 				// and if it needs to be moved. (Judged by bottom not being positive or

   395 				// bottom being smaller than top.)

   396 				var scroll = win.scrollTop(),

   397 					top = widget.offset().top,

   398 					bottom = top + widget.outerHeight(),

   399 					diff = bottom - win.height();

   400 

   401 				if ( diff > scroll ) {

   402 					widget.animate({'top': diff < top ?  top - diff : scroll }, 200);

   403 				}

   404 			});

   405 			event.preventDefault();

   406 		}

   407 	}

   408 

   409 	River = function( element, search ) {

   410 		var self = this;

   411 		this.element = element;

   412 		this.ul = element.children('ul');

   413 		this.waiting = element.find('.river-waiting');

   414 

   415 		this.change( search );

   416 		this.refresh();

   417 

   418 		element.scroll( function(){ self.maybeLoad(); });

   419 		element.delegate('li', 'click', function(e){ self.select( $(this), e ); });

   420 	};

   421 

   422 	$.extend( River.prototype, {

   423 		refresh: function() {

   424 			this.deselect();

   425 			this.visible = this.element.is(':visible');

   426 		},

   427 		show: function() {

   428 			if ( ! this.visible ) {

   429 				this.deselect();

   430 				this.element.show();

   431 				this.visible = true;

   432 			}

   433 		},

   434 		hide: function() {

   435 			this.element.hide();

   436 			this.visible = false;

   437 		},

   438 		// Selects a list item and triggers the river-select event.

   439 		select: function( li, event ) {

   440 			var liHeight, elHeight, liTop, elTop;

   441 

   442 			if ( li.hasClass('unselectable') || li == this.selected )

   443 				return;

   444 

   445 			this.deselect();

   446 			this.selected = li.addClass('selected');

   447 			// Make sure the element is visible

   448 			liHeight = li.outerHeight();

   449 			elHeight = this.element.height();

   450 			liTop = li.position().top;

   451 			elTop = this.element.scrollTop();

   452 

   453 			if ( liTop < 0 ) // Make first visible element

   454 				this.element.scrollTop( elTop + liTop );

   455 			else if ( liTop + liHeight > elHeight ) // Make last visible element

   456 				this.element.scrollTop( elTop + liTop - elHeight + liHeight );

   457 

   458 			// Trigger the river-select event

   459 			this.element.trigger('river-select', [ li, event, this ]);

   460 		},

   461 		deselect: function() {

   462 			if ( this.selected )

   463 				this.selected.removeClass('selected');

   464 			this.selected = false;

   465 		},

   466 		prev: function() {

   467 			if ( ! this.visible )

   468 				return;

   469 

   470 			var to;

   471 			if ( this.selected ) {

   472 				to = this.selected.prev('li');

   473 				if ( to.length )

   474 					this.select( to );

   475 			}

   476 		},

   477 		next: function() {

   478 			if ( ! this.visible )

   479 				return;

   480 

   481 			var to = this.selected ? this.selected.next('li') : $('li:not(.unselectable):first', this.element);

   482 			if ( to.length )

   483 				this.select( to );

   484 		},

   485 		ajax: function( callback ) {

   486 			var self = this,

   487 				delay = this.query.page == 1 ? 0 : wpLink.minRiverAJAXDuration,

   488 				response = wpLink.delayedCallback( function( results, params ) {

   489 					self.process( results, params );

   490 					if ( callback )

   491 						callback( results, params );

   492 				}, delay );

   493 

   494 			this.query.ajax( response );

   495 		},

   496 		change: function( search ) {

   497 			if ( this.query && this._search == search )

   498 				return;

   499 

   500 			this._search = search;

   501 			this.query = new Query( search );

   502 			this.element.scrollTop(0);

   503 		},

   504 		process: function( results, params ) {

   505 			var list = '', alt = true, classes = '',

   506 				firstPage = params.page == 1;

   507 

   508 			if ( !results ) {

   509 				if ( firstPage ) {

   510 					list += '<li class="unselectable"><span class="item-title"><em>'

   511 					+ wpLinkL10n.noMatchesFound

   512 					+ '</em></span></li>';

   513 				}

   514 			} else {

   515 				$.each( results, function() {

   516 					classes = alt ? 'alternate' : '';

   517 					classes += this['title'] ? '' : ' no-title';

   518 					list += classes ? '<li class="' + classes + '">' : '<li>';

   519 					list += '<input type="hidden" class="item-permalink" value="' + this['permalink'] + '" />';

   520 					list += '<span class="item-title">';

   521 					list += this['title'] ? this['title'] : wpLinkL10n.noTitle;

   522 					list += '</span><span class="item-info">' + this['info'] + '</span></li>';

   523 					alt = ! alt;

   524 				});

   525 			}

   526 

   527 			this.ul[ firstPage ? 'html' : 'append' ]( list );

   528 		},

   529 		maybeLoad: function() {

   530 			var self = this,

   531 				el = this.element,

   532 				bottom = el.scrollTop() + el.height();

   533 

   534 			if ( ! this.query.ready() || bottom < this.ul.height() - wpLink.riverBottomThreshold )

   535 				return;

   536 

   537 			setTimeout(function() {

   538 				var newTop = el.scrollTop(),

   539 					newBottom = newTop + el.height();

   540 

   541 				if ( ! self.query.ready() || newBottom < self.ul.height() - wpLink.riverBottomThreshold )

   542 					return;

   543 

   544 				self.waiting.show();

   545 				el.scrollTop( newTop + self.waiting.outerHeight() );

   546 

   547 				self.ajax( function() { self.waiting.hide(); });

   548 			}, wpLink.timeToTriggerRiver );

   549 		}

   550 	});

   551 

   552 	Query = function( search ) {

   553 		this.page = 1;

   554 		this.allLoaded = false;

   555 		this.querying = false;

   556 		this.search = search;

   557 	};

   558 

   559 	$.extend( Query.prototype, {

   560 		ready: function() {

   561 			return !( this.querying || this.allLoaded );

   562 		},

   563 		ajax: function( callback ) {

   564 			var self = this,

   565 				query = {

   566 					action : 'wp-link-ajax',

   567 					page : this.page,

   568 					'_ajax_linking_nonce' : inputs.nonce.val()

   569 				};

   570 

   571 			if ( this.search )

   572 				query.search = this.search;

   573 

   574 			this.querying = true;

   575 

   576 			$.post( ajaxurl, query, function(r) {

   577 				self.page++;

   578 				self.querying = false;

   579 				self.allLoaded = !r;

   580 				callback( r, query );

   581 			}, "json" );

   582 		}

   583 	});

   584 

   585 	$(document).ready( wpLink.init );

   586 })(jQuery);