YUI.add("moodle-atto_accessibilitychecker-button",function(e,t){var n="atto_accessibilitychecker";e.namespace("M.atto_accessibilitychecker").Button=e.Base.create("button",e.M.editor_atto.EditorPlugin,[],{initializer:function(){this.addButton({icon:"e/accessibility_checker",callback:this._displayDialogue})},_displayDialogue:function(){var e=this.getDialogue({headerContent:M.util.get_string("pluginname",n),width:"500px",focusAfterHide:!0});e.set("bodyContent",this._getDialogueContent()).show()},_getDialogueContent:function(){var t=e.Node.create('<div style="word-wrap: break-word;"></div>');return t.append(this._getWarnings()),t.delegate("click",function(e){e.preventDefault();var t=this.get("host"),n=e.currentTarget.getData("sourceNode"),r=this.getDialogue();n?(r.set("focusAfterHide",this.editor).hide(),t.setSelection(t.getSelectionFromNode(n))):r.hide()},"a",this),t},_getWarnings:function(){var t,r=e.Node.create("<div></div>");return t=[],this.editor.all("img").each(function(e){var n=e.getAttribute("alt");(typeof n=="undefined"||n==="")&&e.getAttribute("role")!=="presentation"&&t.push(e)},this),this._addWarnings(r,M.util.get_string("imagesmissingalt",n),t,!0),t=[],this.editor.all("*").each(function(n){var r,i,s,o,u;if(e.Lang.trim(n.get("text"))!==""){r=e.Color.fromArray(this._getComputedBackgroundColor(n,n.getComputedStyle("color")),e.Color.TYPES.RGBA),i=e.Color.fromArray(this._getComputedBackgroundColor(n),e.Color.TYPES.RGBA),o=this._getLuminanceFromCssColor(r),u=this._getLuminanceFromCssColor(i),o>u?s=(o+.05)/(u+.05):s=(u+.05)/(o+.05);if(s<=4.5){var a=0,f=!1;for(a=0;a<t.length;a++){if(n.ancestors("*").indexOf(t[a])!==-1){f=!0;break}if(t[a].ancestors("*").indexOf(n)!==-1){t[a]=n,f=!0;break}}f||t.push(n)}}},this),this._addWarnings(r,M.util.get_string("needsmorecontrast",n),t,!1),this.editor.get("text").length>1e3&&!this.editor.one("h3, h4, h5")&&this._addWarnings(r,M.util.get_string("needsmoreheadings",n),[this.editor],!1),t=[],this.editor.all("table").each(function(e){var n=e.one("caption");(n===null||n.get("text").trim()==="")&&t.push(e)},this),this._addWarnings(r,M.util.get_string("tablesmissingcaption",n),t,!1),t=[],this.editor.all("table").each(function(e){var n=e.one("[colspan],[rowspan]");n!==null&&t.push(e)},this),this._addWarnings(r,M.util.get_string("tableswithmergedcells",n),t,!1),t=[],this.editor.all("table").each(function(e){if(e.one("tr").one("td"))e.all("tr").some(function(n){var r=n.one("th");return!r||r.get("text").trim()===""?(t.push(e),!0):!1},this);else{var n=!1;e.one("tr").all("th").some(function(r){return n=!0,r.get("text").trim()===""?(t.push(e),!0):!1}),n||t.push(e)}},this),this._addWarnings(r,M.util.get_string("tablesmissingheaders",n),t,!1),r.hasChildNodes()||r.append("<p>"+M.util.get_string("nowarnings",n)+"</p>"),r},_addWarnings:function(t,r,i,s){var o,u,a,f,l,c,h,p;if(i.length>0){o=e.Node.create("<p>"+r+"</p>"),u=e.Node.create('<ol class="accessibilitywarnings"></ol>'),a=0;for(a=0;a<i.length;a++)c=e.Node.create("<li></li>"),s?(f=i[a].getAttribute("src"),h=e.Node.create('<a href="#"><img src="'+f+'" /> '+f+"</a>")):(l="innerText"in i[a]?"innerText":"textContent",p=i[a].get(l).trim(),p===""&&(p=M.util.get_string("emptytext",n)),i[a]===this.editor&&(p=M.util.get_string("entiredocument",n)),h=e.Node.create('<a href="#">'+p+"</a>")),h.setData("sourceNode",i[a]),c.append(h),u.append(c);o.append(u),t.append(o)}},_getLuminanceFromCssColor:function(t){var n;t==="transparent"&&(t="#ffffff"),n=e.Color.toArray(e.Color.toRGB(t));var r=function(e){return e=parseInt(e,10)/255,e<=.03928?e/=12.92:e=Math.pow((e+.055)/1.055,2.4),e},i=r(n[0]),s=r(n[1]),o=r(n[2]);return.2126*i+.7152*s+.0722*o},_getComputedBackgroundColor:function(t,n){n=n||t.getComputedStyle("backgroundColor"),n.toLowerCase()==="transparent"&&(n="rgba(1, 1, 1, 0)");var r=e.Color.toArray(n),i=r[3];if(i===1)return r;var s=this._getComputedBackgroundColor(t.get("parentNode"));return[(1-i)*s[0]+i*r[0],(1-i)*s[1]+i*r[1],(1-i)*s[2]+i*r[2],1]}})},"@VERSION@",{requires:["color-base","moodle-editor_atto-plugin"]});
