gecko/testing/mochitest/tests/SimpleTest/WindowSnapshot.js

52 lines
1.5 KiB
JavaScript

netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
var gWindowUtils;
try {
gWindowUtils = window.QueryInterface(CI.nsIInterfaceRequestor).getInterface(CI.nsIDOMWindowUtils);
if (gWindowUtils && !gWindowUtils.compareCanvases)
gWindowUtils = null;
} catch (e) {
gWindowUtils = null;
}
function snapshotWindow(win, withCaret) {
var el = document.createElementNS("http://www.w3.org/1999/xhtml", "canvas");
el.width = win.innerWidth;
el.height = win.innerHeight;
// drawWindow requires privileges
netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
var ctx = el.getContext("2d");
ctx.drawWindow(win, win.scrollX, win.scrollY,
win.innerWidth, win.innerHeight,
"rgb(255,255,255)",
withCaret ? ctx.DRAWWINDOW_DRAW_CARET : 0);
return el;
}
// If the two snapshots don't compare as expected (true for equal, false for
// unequal), returns their serializations as data URIs. In all cases, returns
// whether the comparison was as expected.
function compareSnapshots(s1, s2, expected) {
netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
var s1Str, s2Str;
var correct = false;
if (gWindowUtils) {
correct = ((gWindowUtils.compareCanvases(s1, s2, {}) == 0) == expected);
}
if (!correct) {
s1Str = s1.toDataURL();
s2Str = s2.toDataURL();
if (!gWindowUtils) {
correct = ((s1Str == s2Str) == expected);
}
}
return [correct, s1Str, s2Str];
}