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Remove IE6 CSS hover support 

The hover effect is not a basic usability requirement.
Having this ancient cruft in our HTML depresses me.

Change-Id: I0ca5b3b6a6037a9ec733283c656996969cc020e3
This commit is contained in:
Ori Livneh 2015-08-11 12:33:43 -07:00 committed by Krinkle
parent 600abc4103
commit c2a6262807
3 changed files with 1 additions and 307 deletions
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12
SkinVector.php
View File

@ -51,17 +51,7 @@ class SkinVector extends SkinTemplate {
$out->addModuleStyles( 'skins.vector.styles.responsive' );
}
// Append CSS which includes IE only behavior fixes for hover support -
// this is better than including this in a CSS file since it doesn't
// wait for the CSS file to load before fetching the HTC file.
$min = $this->getRequest()->getFuzzyBool( 'debug' ) ? '' : '.min';
$out->addHeadItem( 'csshover',
'<!--[if lt IE 7]><style type="text/css">body{behavior:url("' .
htmlspecialchars( $this->getConfig()->get( 'LocalStylePath' ) ) .
"/{$this->stylename}/csshover{$min}.htc\")}</style><![endif]-->"
);
$out->addModules( array( 'skins.vector.js' ) );
$out->addModules( 'skins.vector.js' );
}
/**

284
csshover.htc
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@ -1,284 +0,0 @@
<public:attach event="ondocumentready" onevent="CSSHover()" />
<script>
/**
* Whatever:hover - V3.11
* ------------------------------------------------------------
* Author - Peter Nederlof, http://www.xs4all.nl/~peterned
* License - http://creativecommons.org/licenses/LGPL/2.1
*
* Special thanks to Sergiu Dumitriu, http://purl.org/net/sergiu,
* for fixing the expression loop.
*
* Whatever:hover is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Whatever:hover is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* howto: body { behavior:url("csshover3.htc"); }
* ------------------------------------------------------------
*/
window.CSSHover = (function(){
// regular expressions, used and explained later on.
var REG_INTERACTIVE = /(^|\s)((([^a]([^ ]+)?)|(a([^#.][^ ]+)+)):(hover|active|focus))/i;
var REG_AFFECTED = /(.*?)\:(hover|active|focus)/i;
var REG_PSEUDO = /[^:]+:([a-z\-]+).*/i;
var REG_SELECT = /(\.([a-z0-9_\-]+):[a-z]+)|(:[a-z]+)/gi;
var REG_CLASS = /\.([a-z0-9_\-]*on(hover|active|focus))/i;
var REG_MSIE = /msie (5|6|7)/i;
var REG_COMPAT = /backcompat/i;
// property mapping, real css properties must be used in order to clear expressions later on...
// Uses obscure css properties that no-one is likely to use. The properties are borrowed to
// set an expression, and are then restored to the most likely correct value.
var Properties = {
index: 0,
list: ['text-kashida', 'text-kashida-space', 'text-justify'],
get: function() {
return this.list[(this.index++)%this.list.length];
}
};
// camelize is used to convert css properties from (eg) text-kashida to textKashida
var camelize = function(str) {
return str.replace(/-(.)/mg, function(result, match){
return match.toUpperCase();
});
};
/**
* Local CSSHover object
* --------------------------
*/
var CSSHover = {
// array of CSSHoverElements, used to unload created events
elements: [],
// buffer used for checking on duplicate expressions
callbacks: {},
// init, called once ondomcontentready via the exposed window.CSSHover function
init:function() {
// don't run in IE8 standards; expressions don't work in standards mode anyway,
// and the stuff we're trying to fix should already work properly
if(!REG_MSIE.test(navigator.userAgent) && !REG_COMPAT.test(window.document.compatMode)) {
return;
}
// start parsing the existing stylesheets
var sheets = window.document.styleSheets, l = sheets.length;
for(var i=0; i<l; i++) {
this.parseStylesheet(sheets[i]);
}
},
// called from init, parses individual stylesheets
parseStylesheet:function(sheet) {
// check sheet imports and parse those recursively
if(sheet.imports) {
try {
var imports = sheet.imports;
var l = imports.length;
for(var i=0; i<l; i++) {
this.parseStylesheet(sheet.imports[i]);
}
} catch(securityException){
// trycatch for various possible errors
}
}
// interate the sheet's rules and send them to the parser
try {
var rules = sheet.rules;
var r = rules.length;
for(var j=0; j<r; j++) {
this.parseCSSRule(rules[j], sheet);
}
} catch(someException){
// trycatch for various errors, most likely accessing the sheet's rules.
}
},
// magic starts here ...
parseCSSRule:function(rule, sheet) {
// The sheet is used to insert new rules into, this must be the same sheet the rule
// came from, to ensure that relative paths keep pointing to the right location.
// only parse a rule if it contains an interactive pseudo.
var select = rule.selectorText;
if(REG_INTERACTIVE.test(select)) {
var style = rule.style.cssText;
// affected elements are found by truncating the selector after the interactive pseudo,
// eg: "div li:hover" >> "div li"
var affected = REG_AFFECTED.exec(select)[1];
// that pseudo is needed for a classname, and defines the type of interaction (focus, hover, active)
// eg: "li:hover" >> "onhover"
var pseudo = select.replace(REG_PSEUDO, 'on$1');
// the new selector is going to use that classname in a new css rule,
// since IE6 doesn't support multiple classnames, this is merged into one classname
// eg: "li:hover" >> "li.onhover", "li.folder:hover" >> "li.folderonhover"
var newSelect = select.replace(REG_SELECT, '.$2' + pseudo);
// the classname is needed for the events that are going to be set on affected nodes
// eg: "li.folder:hover" >> "folderonhover"
var className = REG_CLASS.exec(newSelect)[1];
// no need to set the same callback more than once when the same selector uses the same classname
var hash = affected + className;
if(!this.callbacks[hash]) {
// affected elements are given an expression under a borrowed css property, because fake properties
// can't have their expressions cleared. Different properties are used per pseudo, to avoid
// expressions from overwriting eachother. The expression does a callback to CSSHover.patch,
// rerouted via the exposed window.CSSHover function.
var property = Properties.get();
var atRuntime = camelize(property);
// because the expression is added to the stylesheet, and styles are always applied to html that is
// dynamically added to the dom, the expression will also trigger for those new elements (provided
// they are selected by the affected selector).
sheet.addRule(affected, property + ':expression(CSSHover(this, "'+pseudo+'", "'+className+'", "'+atRuntime+'"))');
// hash it, so an identical selector/class combo does not duplicate the expression
this.callbacks[hash] = true;
}
// duplicate expressions need not be set, but the style could differ
sheet.addRule(newSelect, style);
}
},
// called via the expression, patches individual nodes
patch:function(node, type, className, property) {
// restores the borrowed css property to the value of its immediate parent, clearing
// the expression so that it's not repeatedly called.
try {
var value = node.parentNode.currentStyle[property];
node.style[property] = value;
} catch(e) {
// the above reset should never fail, but just in case, clear the runtimeStyle if it does.
// this will also stop the expression.
node.runtimeStyle[property] = '';
}
// just to make sure, also keep track of patched classnames locally on the node
if(!node.csshover) {
node.csshover = [];
}
// and check for it to prevent duplicate events with the same classname from being set
if(!node.csshover[className]) {
node.csshover[className] = true;
// create an instance for the given type and class
var element = new CSSHoverElement(node, type, className);
// and store that instance for unloading later on
this.elements.push(element);
}
// returns a dummy value to the expression
return type;
},
// unload stuff onbeforeunload
unload:function() {
try {
// remove events
var l = this.elements.length;
for(var i=0; i<l; i++) {
this.elements[i].unload();
}
// and set properties to null
this.elements = [];
this.callbacks = {};
} catch (e) {
}
}
};
/**
* CSSHoverElement
* --------------------------
*/
// the event types associated with the interactive pseudos
var CSSEvents = {
onhover: { activator: 'onmouseenter', deactivator: 'onmouseleave' },
onactive: { activator: 'onmousedown', deactivator: 'onmouseup' },
onfocus: { activator: 'onfocus', deactivator: 'onblur' }
};
// CSSHoverElement constructor, called via CSSHover.patch
function CSSHoverElement(node, type, className) {
// the CSSHoverElement patches individual nodes by manually applying the events that should
// have fired by the css pseudoclasses, eg mouseenter and mouseleave for :hover.
this.node = node;
this.type = type;
var replacer = new RegExp('(^|\\s)'+className+'(\\s|$)', 'g');
// store event handlers for removal onunload
this.activator = function(){ node.className += ' ' + className; };
this.deactivator = function(){ node.className = node.className.replace(replacer, ' '); };
// add the events
node.attachEvent(CSSEvents[type].activator, this.activator);
node.attachEvent(CSSEvents[type].deactivator, this.deactivator);
}
CSSHoverElement.prototype = {
// onbeforeunload, called via CSSHover.unload
unload:function() {
// remove events
this.node.detachEvent(CSSEvents[this.type].activator, this.activator);
this.node.detachEvent(CSSEvents[this.type].deactivator, this.deactivator);
// and set properties to null
this.activator = null;
this.deactivator = null;
this.node = null;
this.type = null;
}
};
// add the unload to the onbeforeunload event
window.attachEvent('onbeforeunload', function(){
CSSHover.unload();
});
/**
* Public hook
* --------------------------
*/
return function(node, type, className, property) {
if(node) {
// called via the css expression; patches individual nodes
return CSSHover.patch(node, type, className, property);
} else {
// called ondomcontentready via the public:attach node
CSSHover.init();
}
};
})();
</script>

12
csshover.min.htc
View File

@ -1,12 +0,0 @@
<public:attach event="ondocumentready" onevent="CSSHover()" />
<script>
/**
* Whatever:hover - V3.11
* http://www.xs4all.nl/~peterned/
*
* Copyright (c) 2009 Peter Nederlof
* Licensed under the LGPL license
* http://creativecommons.org/licenses/LGPL/2.1
*/
window.CSSHover=(function(){var m=/(^|\s)((([^a]([^ ]+)?)|(a([^#.][^ ]+)+)):(hover|active|focus))/i;var n=/(.*?)\:(hover|active|focus)/i;var o=/[^:]+:([a-z\-]+).*/i;var p=/(\.([a-z0-9_\-]+):[a-z]+)|(:[a-z]+)/gi;var q=/\.([a-z0-9_\-]*on(hover|active|focus))/i;var s=/msie (5|6|7)/i;var t=/backcompat/i;var u={index:0,list:['text-kashida','text-kashida-space','text-justify'],get:function(){return this.list[(this.index++)%this.list.length]}};var v=function(c){return c.replace(/-(.)/mg,function(a,b){return b.toUpperCase()})};var w={elements:[],callbacks:{},init:function(){if(!s.test(navigator.userAgent)&&!t.test(window.document.compatMode)){return}var a=window.document.styleSheets,l=a.length;for(var i=0;i<l;i++){this.parseStylesheet(a[i])}},parseStylesheet:function(a){if(a.imports){try{var b=a.imports;var l=b.length;for(var i=0;i<l;i++){this.parseStylesheet(a.imports[i])}}catch(securityException){}}try{var c=a.rules;var r=c.length;for(var j=0;j<r;j++){this.parseCSSRule(c[j],a)}}catch(someException){}},parseCSSRule:function(a,b){var c=a.selectorText;if(m.test(c)){var d=a.style.cssText;var e=n.exec(c)[1];var f=c.replace(o,'on$1');var g=c.replace(p,'.$2'+f);var h=q.exec(g)[1];var i=e+h;if(!this.callbacks[i]){var j=u.get();var k=v(j);b.addRule(e,j+':expression(CSSHover(this, "'+f+'", "'+h+'", "'+k+'"))');this.callbacks[i]=true}b.addRule(g,d)}},patch:function(a,b,c,d){try{var f=a.parentNode.currentStyle[d];a.style[d]=f}catch(e){a.runtimeStyle[d]=''}if(!a.csshover){a.csshover=[]}if(!a.csshover[c]){a.csshover[c]=true;var g=new CSSHoverElement(a,b,c);this.elements.push(g)}return b},unload:function(){try{var l=this.elements.length;for(var i=0;i<l;i++){this.elements[i].unload()}this.elements=[];this.callbacks={}}catch(e){}}};var x={onhover:{activator:'onmouseenter',deactivator:'onmouseleave'},onactive:{activator:'onmousedown',deactivator:'onmouseup'},onfocus:{activator:'onfocus',deactivator:'onblur'}};function CSSHoverElement(a,b,c){this.node=a;this.type=b;var d=new RegExp('(^|\\s)'+c+'(\\s|$)','g');this.activator=function(){a.className+=' '+c};this.deactivator=function(){a.className=a.className.replace(d,' ')};a.attachEvent(x[b].activator,this.activator);a.attachEvent(x[b].deactivator,this.deactivator)}CSSHoverElement.prototype={unload:function(){this.node.detachEvent(x[this.type].activator,this.activator);this.node.detachEvent(x[this.type].deactivator,this.deactivator);this.activator=null;this.deactivator=null;this.node=null;this.type=null}};window.attachEvent('onbeforeunload',function(){w.unload()});return function(a,b,c,d){if(a){return w.patch(a,b,c,d)}else{w.init()}}})();
</script>