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Fix #12904: Firefox defaultDisplay with body/iframe display:none. Rep… 
…ort and solution by @maranomynet; test by @rwldrn.
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@gibson042
gibson042 committed Dec 8, 2012
1 parent 23d7cf0 commit d343e6b
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Showing 2 changed files with 60 additions and 52 deletions.
64 src/css.js
View file
@@ -1,4 +1,4 @@
var curCSS, iframe, iframeDoc,
var curCSS, iframe,
ralpha = /alpha\([^)]*\)/i,
ropacity = /opacity\s*=\s*([^)]*)/,
rposition = /^(top|right|bottom|left)$/,
@@ -446,44 +446,38 @@ function getWidthOrHeight( elem, name, extra ) {

// Try to determine the default display value of an element
function css_defaultDisplay( nodeName ) {
if ( elemdisplay[ nodeName ] ) {
return elemdisplay[ nodeName ];
}

var elem = jQuery( "<" + nodeName + ">" ).appendTo( document.body ),
display = elem.css("display");
elem.remove();

// If the simple way fails,
// get element's real default display by attaching it to a temp iframe
if ( display === "none" || display === "" ) {
// Use the already-created iframe if possible
iframe = document.body.appendChild(
iframe || jQuery.extend( document.createElement("iframe"), {
frameBorder: 0,
width: 0,
height: 0
})
);

// Create a cacheable copy of the iframe document on first call.
// IE and Opera will allow us to reuse the iframeDoc without re-writing the fake HTML
// document to it; WebKit & Firefox won't allow reusing the iframe document.
if ( !iframeDoc || !iframe.createElement ) {
iframeDoc = ( iframe.contentWindow || iframe.contentDocument ).document;
iframeDoc.write("<!doctype html><html><body>");
iframeDoc.close();
var elem,
doc = document,
display = elemdisplay[ nodeName ];

if ( !display ) {
elem = jQuery( doc.createElement( nodeName ) );
display = curCSS( elem.appendTo( doc.body )[0], "display" );
elem.remove();

// If the simple way fails, read from inside an iframe
if ( display === "none" || !display ) {
// Use the already-created iframe if possible
iframe = ( iframe ||
jQuery("<iframe frameborder='0' width='0' height='0'/>")
.css( "cssText", "display:block !important" )
).appendTo( doc.documentElement );

// Always write a new HTML skeleton so Webkit and Firefox don't choke on reuse
doc = ( iframe[0].contentWindow || iframe[0].contentDocument ).document;
doc.write("<!doctype html><html><body>");
doc.close();

elem = jQuery( doc.createElement( nodeName ) );
display = curCSS( elem.appendTo( doc.body )[0], "display" );
elem.remove();
iframe.detach();
}

elem = iframeDoc.body.appendChild( iframeDoc.createElement(nodeName) );

display = curCSS( elem, "display" );
document.body.removeChild( iframe );
// Store the correct default display
elemdisplay[ nodeName ] = display;
}

// Store the correct default display
elemdisplay[ nodeName ] = display;

return display;
}

48 test/unit/css.js
View file
@@ -574,19 +574,33 @@ test( "show() resolves correct default display for detached nodes", function(){
test("show() resolves correct default display #10227", function() {
expect(2);

jQuery("html").append(
var body = jQuery("body");
body.append(
"<p id='ddisplay'>a<style>body{display:none}</style></p>"
);

equal( jQuery("body").css("display"), "none", "Initial display: none" );
equal( body.css("display"), "none", "Initial display: none" );

jQuery("body").show();

equal( jQuery("body").css("display"), "block", "Correct display: block" );
body.show();
equal( body.css("display"), "block", "Correct display: block" );

jQuery("#ddisplay").remove();
QUnit.expectJqData( body[0], "olddisplay" );
});

test("show() resolves correct default display when iframe display:none #12904", function() {
expect(2);

var ddisplay = jQuery(
"<p id='ddisplay'>a<style>p{display:none}iframe{display:none !important}</style></p>"
).appendTo("body");

equal( ddisplay.css("display"), "none", "Initial display: none" );

ddisplay.show();
equal( ddisplay.css("display"), "block", "Correct display: block" );

jQuery.cache = {};
ddisplay.remove();
});

test("toggle()", function() {
@@ -871,17 +885,17 @@ test( "cssHooks - expand", function() {
test( "css opacity consistency across browsers (#12685)", function() {
expect( 4 );

var fixture = jQuery("#qunit-fixture"),
style = jQuery("<style>.opacityWithSpaces_t12685 { opacity: 0.1; filter: alpha(opacity = 10); } .opacityNoSpaces_t12685 { opacity: 0.2; filter: alpha(opacity=20); }</style>").appendTo(fixture),
el = jQuery("<div class='opacityWithSpaces_t12685'></div>").appendTo(fixture);
equal( Math.round( el.css("opacity") * 100 ), 10, "opacity from style sheet (filter:alpha with spaces)" );
el.removeClass("opacityWithSpaces_t12685").addClass("opacityNoSpaces_t12685");
equal( Math.round( el.css("opacity") * 100 ), 20, "opacity from style sheet (filter:alpha without spaces)" );
el.css( "opacity", 0.3 );
equal( Math.round( el.css("opacity") * 100 ), 30, "override opacity" );
el.css( "opacity", "" );
equal( Math.round( el.css("opacity") * 100 ), 20, "remove opacity override" );
var fixture = jQuery("#qunit-fixture"),
style = jQuery("<style>.opacityWithSpaces_t12685 { opacity: 0.1; filter: alpha(opacity = 10); } .opacityNoSpaces_t12685 { opacity: 0.2; filter: alpha(opacity=20); }</style>").appendTo(fixture),
el = jQuery("<div class='opacityWithSpaces_t12685'></div>").appendTo(fixture);

equal( Math.round( el.css("opacity") * 100 ), 10, "opacity from style sheet (filter:alpha with spaces)" );
el.removeClass("opacityWithSpaces_t12685").addClass("opacityNoSpaces_t12685");
equal( Math.round( el.css("opacity") * 100 ), 20, "opacity from style sheet (filter:alpha without spaces)" );
el.css( "opacity", 0.3 );
equal( Math.round( el.css("opacity") * 100 ), 30, "override opacity" );
el.css( "opacity", "" );
equal( Math.round( el.css("opacity") * 100 ), 20, "remove opacity override" );
});

}

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