diff options
author | Andrew Dolgov <[email protected]> | 2012-08-14 18:59:10 +0400 |
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committer | Andrew Dolgov <[email protected]> | 2012-08-14 18:59:18 +0400 |
commit | 1354d17270961fff662d40f90521223f8fd0d73b (patch) | |
tree | e9266be71587e47c800303446e968a6d3565e2cf /lib/dijit/a11y.js.uncompressed.js | |
parent | d04f8c826f5283765f52cf6b98b42a1ed8f2d6bc (diff) |
update dojo to 1.7.3
Diffstat (limited to 'lib/dijit/a11y.js.uncompressed.js')
-rw-r--r-- | lib/dijit/a11y.js.uncompressed.js | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/lib/dijit/a11y.js.uncompressed.js b/lib/dijit/a11y.js.uncompressed.js new file mode 100644 index 000000000..83f97cb1e --- /dev/null +++ b/lib/dijit/a11y.js.uncompressed.js @@ -0,0 +1,177 @@ +define("dijit/a11y", [ + "dojo/_base/array", // array.forEach array.map + "dojo/_base/config", // defaultDuration + "dojo/_base/declare", // declare + "dojo/dom", // dom.byId + "dojo/dom-attr", // domAttr.attr domAttr.has + "dojo/dom-style", // style.style + "dojo/_base/sniff", // has("ie") + "./_base/manager", // manager._isElementShown + "." // for exporting methods to dijit namespace +], function(array, config, declare, dom, domAttr, domStyle, has, manager, dijit){ + + // module: + // dijit/a11y + // summary: + // Accessibility utility functions (keyboard, tab stops, etc.) + + var shown = (dijit._isElementShown = function(/*Element*/ elem){ + var s = domStyle.get(elem); + return (s.visibility != "hidden") + && (s.visibility != "collapsed") + && (s.display != "none") + && (domAttr.get(elem, "type") != "hidden"); + }); + + dijit.hasDefaultTabStop = function(/*Element*/ elem){ + // summary: + // Tests if element is tab-navigable even without an explicit tabIndex setting + + // No explicit tabIndex setting, need to investigate node type + switch(elem.nodeName.toLowerCase()){ + case "a": + // An <a> w/out a tabindex is only navigable if it has an href + return domAttr.has(elem, "href"); + case "area": + case "button": + case "input": + case "object": + case "select": + case "textarea": + // These are navigable by default + return true; + case "iframe": + // If it's an editor <iframe> then it's tab navigable. + var body; + try{ + // non-IE + var contentDocument = elem.contentDocument; + if("designMode" in contentDocument && contentDocument.designMode == "on"){ + return true; + } + body = contentDocument.body; + }catch(e1){ + // contentWindow.document isn't accessible within IE7/8 + // if the iframe.src points to a foreign url and this + // page contains an element, that could get focus + try{ + body = elem.contentWindow.document.body; + }catch(e2){ + return false; + } + } + return body && (body.contentEditable == 'true' || + (body.firstChild && body.firstChild.contentEditable == 'true')); + default: + return elem.contentEditable == 'true'; + } + }; + + var isTabNavigable = (dijit.isTabNavigable = function(/*Element*/ elem){ + // summary: + // Tests if an element is tab-navigable + + // TODO: convert (and rename method) to return effective tabIndex; will save time in _getTabNavigable() + if(domAttr.get(elem, "disabled")){ + return false; + }else if(domAttr.has(elem, "tabIndex")){ + // Explicit tab index setting + return domAttr.get(elem, "tabIndex") >= 0; // boolean + }else{ + // No explicit tabIndex setting, so depends on node type + return dijit.hasDefaultTabStop(elem); + } + }); + + dijit._getTabNavigable = function(/*DOMNode*/ root){ + // summary: + // Finds descendants of the specified root node. + // + // description: + // Finds the following descendants of the specified root node: + // * the first tab-navigable element in document order + // without a tabIndex or with tabIndex="0" + // * the last tab-navigable element in document order + // without a tabIndex or with tabIndex="0" + // * the first element in document order with the lowest + // positive tabIndex value + // * the last element in document order with the highest + // positive tabIndex value + var first, last, lowest, lowestTabindex, highest, highestTabindex, radioSelected = {}; + + function radioName(node){ + // If this element is part of a radio button group, return the name for that group. + return node && node.tagName.toLowerCase() == "input" && + node.type && node.type.toLowerCase() == "radio" && + node.name && node.name.toLowerCase(); + } + + var walkTree = function(/*DOMNode*/parent){ + for(var child = parent.firstChild; child; child = child.nextSibling){ + // Skip text elements, hidden elements, and also non-HTML elements (those in custom namespaces) in IE, + // since show() invokes getAttribute("type"), which crash on VML nodes in IE. + if(child.nodeType != 1 || (has("ie") && child.scopeName !== "HTML") || !shown(child)){ + continue; + } + + if(isTabNavigable(child)){ + var tabindex = domAttr.get(child, "tabIndex"); + if(!domAttr.has(child, "tabIndex") || tabindex == 0){ + if(!first){ + first = child; + } + last = child; + }else if(tabindex > 0){ + if(!lowest || tabindex < lowestTabindex){ + lowestTabindex = tabindex; + lowest = child; + } + if(!highest || tabindex >= highestTabindex){ + highestTabindex = tabindex; + highest = child; + } + } + var rn = radioName(child); + if(domAttr.get(child, "checked") && rn){ + radioSelected[rn] = child; + } + } + if(child.nodeName.toUpperCase() != 'SELECT'){ + walkTree(child); + } + } + }; + if(shown(root)){ + walkTree(root); + } + function rs(node){ + // substitute checked radio button for unchecked one, if there is a checked one with the same name. + return radioSelected[radioName(node)] || node; + } + + return { first: rs(first), last: rs(last), lowest: rs(lowest), highest: rs(highest) }; + }; + dijit.getFirstInTabbingOrder = function(/*String|DOMNode*/ root){ + // summary: + // Finds the descendant of the specified root node + // that is first in the tabbing order + var elems = dijit._getTabNavigable(dom.byId(root)); + return elems.lowest ? elems.lowest : elems.first; // DomNode + }; + + dijit.getLastInTabbingOrder = function(/*String|DOMNode*/ root){ + // summary: + // Finds the descendant of the specified root node + // that is last in the tabbing order + var elems = dijit._getTabNavigable(dom.byId(root)); + return elems.last ? elems.last : elems.highest; // DomNode + }; + + return { + hasDefaultTabStop: dijit.hasDefaultTabStop, + isTabNavigable: dijit.isTabNavigable, + _getTabNavigable: dijit._getTabNavigable, + getFirstInTabbingOrder: dijit.getFirstInTabbingOrder, + getLastInTabbingOrder: dijit.getLastInTabbingOrder + }; +}); |