Bug 1812970 - Avoid using Skia's deprecated clip ops. r=jrmuizel
Skia upstream removed deprecated clip ops that could be used to replace
the clipping stack and bypass clips. We shouldn't really need to do this
anymore, as we can work around it just using public APIs.
The only SkCanvas operation that allows us to bypass clipping is
writePixels, which still allows us to implement CopySurface/putImageData.
Other instances where we were using the replace op for DrawTargetWebgl
layering support can just be worked around by creating a separate
DrawTargetSkia pointing to the same pixel data, but on which no clipping
or transforms are applied so that we can freely do drawing operations
on it to the base layer pixel data regardless of any user-applied clipping.
Differential Revision:
https://phabricator.services.mozilla.com/D168039
<!DOCTYPE html>
<title>drag & drop - microdata for selection partially intersecting multiple items</title>
<style>
body > div {
height: 100px;
width: 200px;
background-color: fuchsia;
position: absolute;
top: 8px;
left: 8px;
}
span * {
display: none;
}
body > div + div {
background-color: navy;
top: 116px;
}
body > div + div + div {
background-color: orange;
top: 224px;
}
p:first-of-type {
margin-top: 350px;
}
</style>
<script>
function makeEl(eltype,props,contents) {
var elem = document.createElement(eltype);
for( var i in props ) {
if( props.hasOwnProperty(i) ) {
elem.setAttribute(i,props[i]);
}
}
if( contents ) {
elem.innerHTML = contents;
}
return elem;
}
var orange, fails = [], doneonce = false;
window.onload = function() {
orange = document.getElementsByTagName('div')[2];
orange.childNodes[1].appendChild( makeEl('span',{itemprop:'foo'},'test') );
orange.childNodes[3].appendChild( makeEl('span',{itemprop:'bar'},'test') );
orange.ondragstart = function(e) {
e.dataTransfer.effectAllowed = 'copy';
e.dataTransfer.setData('Text', 'dummy text');
var err;
if( err = checkprops(e.dataTransfer.getData('application/microdata+json')) ) {
fails[fails.length] = e.type + ' ' + err;
}
};
orange.previousSibling.ondragenter = orange.previousSibling.ondragleave = orange.previousSibling.ondragover =
orange.ondrag = orange.ondragend = function(e) {
if( e.type == 'dragover' || e.type == 'dragenter' ) {
e.preventDefault();
e.dataTransfer.dropEffect = 'copy';
}
if( e.dataTransfer.getData('application/microdata+json') ) {
fails[fails.length] = e.type + ' unexpectedly had microdata (security restriction)';
}
};
orange.previousSibling.ondrop = function(e) {
var err;
if( err = checkprops(e.dataTransfer.getData('application/microdata+json')) ) {
fails[fails.length] = e.type + ' ' + err;
}
if( e.type != 'drop' ) { return; }
if( doneonce ) { return; }
doneonce = true;
setTimeout(function () {
document.getElementsByTagName('p')[0].innerHTML = fails.length ? ( 'FAIL: ' + fails.join('<br>') ) : 'PASS';
fails = [];
}, 200 );
};
};
function checkprops(md) {
// http://dev.w3.org/html5/spec/dnd.html#list-of-dragged-nodes
//"If it is a selection that is being dragged, then the list of dragged nodes contains, in tree order, every node that is partially or completely included in the selection (including all their ancestors)."
//given this "ancestors" situation, what is to stop every item in the body from being included? oversight perhaps? tests 18-20 cover this more extensively
var i;
if( !md ) { return 'no microdata'; }
md = JSON.parse(md);
if( !md.items ) { return 'no items'; }
if( md.items.length != 2 ) { return md.items.length+' items instead of 2'; }
if( !md.items[0].properties ) { return 'no items[0].properties'; }
if( !md.items[0].properties.foo ) { return 'no items[0].properties.foo'; }
if( md.items[0].properties.foo.length != 1 ) { return 'items[0].properties.foo length '+md.items[0].properties.foo.length+' instead of 1'; }
if( md.items[0].properties.foo[0] != orange.childNodes[1].properties.namedItem('foo').getValues()[0] ) { return 'items[0].properties.foo[0] <i>'+md.items[0].properties.foo[0]+'</i> instead of <i>'+orange.childNodes[1].properties.namedItem('foo').getValues()[0]+'</i>'; }
if( !md.items[1].properties ) { return 'no items[1].properties'; }
if( !md.items[1].properties.bar ) { return 'no items[1].properties.bar'; }
if( md.items[1].properties.bar.length != 1 ) { return 'items[1].properties.bar length '+md.items[1].properties.bar.length+' instead of 1'; }
if( md.items[1].properties.bar[0] != orange.childNodes[1].properties.namedItem('foo').getValues()[0] ) { return 'items[1].properties.bar[0] <i>'+md.items[1].properties.bar[0]+'</i> instead of <i>'+orange.childNodes[1].properties.namedItem('foo').getValues()[0]+'</i>'; }
return '';
}
</script>
<div></div><div></div><div>01<span itemscope>23</span>45<span itemscope>67</span>89</div>
<p>Use your pointing device to select the text substring "3456" above, drag the selection upwards to the pink box,
then back to the blue box, and release it.</p>
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