mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
63 lines
2.0 KiB
JavaScript
63 lines
2.0 KiB
JavaScript
|
waitForExplicitFinish();
|
||
|
|
|
||
|
|
let pageSource =
|
||
|
|
'<html><body>' +
|
||
|
|
'<img id="testImg" src="' + TESTROOT + 'big.png">' +
|
||
|
|
'</body></html>';
|
||
|
|
|
||
|
|
let oldDiscardingPref, oldTab, newTab;
|
||
|
|
let prefBranch = Cc["@mozilla.org/preferences-service;1"]
|
||
|
|
.getService(Ci.nsIPrefService)
|
||
|
|
.getBranch('image.mem.');
|
||
|
|
|
||
|
|
function isImgDecoded() {
|
||
|
|
let img = gBrowser.getBrowserForTab(newTab).contentWindow
|
||
|
|
.document.getElementById('testImg');
|
||
|
|
img.QueryInterface(Ci.nsIImageLoadingContent);
|
||
|
|
let request = img.getRequest(Ci.nsIImageLoadingContent.CURRENT_REQUEST);
|
||
|
|
return request.imageStatus & Ci.imgIRequest.STATUS_FRAME_COMPLETE ? true : false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Ensure that the image is decoded by drawing it to a canvas.
|
||
|
|
function forceDecodeImg() {
|
||
|
|
let doc = gBrowser.getBrowserForTab(newTab).contentWindow.document;
|
||
|
|
let img = doc.getElementById('testImg');
|
||
|
|
let canvas = doc.createElement('canvas');
|
||
|
|
let ctx = canvas.getContext('2d');
|
||
|
|
ctx.drawImage(img, 0, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
function test() {
|
||
|
|
// Enable the discarding pref.
|
||
|
|
oldDiscardingPref = prefBranch.getBoolPref('discardable');
|
||
|
|
prefBranch.setBoolPref('discardable', true);
|
||
|
|
|
||
|
|
// Create and focus a new tab.
|
||
|
|
oldTab = gBrowser.selectedTab;
|
||
|
|
newTab = gBrowser.addTab('data:text/html,' + pageSource);
|
||
|
|
gBrowser.selectedTab = newTab;
|
||
|
|
|
||
|
|
// Run step2 after the tab loads.
|
||
|
|
gBrowser.getBrowserForTab(newTab)
|
||
|
|
.addEventListener("pageshow", step2 );
|
||
|
|
}
|
||
|
|
|
||
|
|
function step2() {
|
||
|
|
// Check that the image is decoded.
|
||
|
|
forceDecodeImg();
|
||
|
|
ok(isImgDecoded(), 'Image should initially be decoded.');
|
||
|
|
|
||
|
|
// Focus the old tab, then fire a memory-pressure notification. This should
|
||
|
|
// cause the decoded image in the new tab to be discarded.
|
||
|
|
gBrowser.selectedTab = oldTab;
|
||
|
|
var os = Cc["@mozilla.org/observer-service;1"]
|
||
|
|
.getService(Ci.nsIObserverService);
|
||
|
|
os.notifyObservers(null, 'memory-pressure', 'heap-minimize');
|
||
|
|
ok(!isImgDecoded(), 'Image should be discarded.');
|
||
|
|
|
||
|
|
// And we're done.
|
||
|
|
gBrowser.removeTab(newTab);
|
||
|
|
prefBranch.setBoolPref('discardable', oldDiscardingPref);
|
||
|
|
finish();
|
||
|
|
}
|