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