<!DOCTYPE HTML> <html lang="en"> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=394057 --> <head> <title>Test for Bug 394057</title> <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> <style type="text/css"> #display { background: yellow; color: black; font-family: serif; } </style> </head> <body> <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=394057">Mozilla Bug 394057</a> <table id="display"><tr><td>MmMmMm...iiiIIIlll---</td></tr></table> <div id="content" style="display: none"> </div> <pre id="test"> <script class="testbody" type="text/javascript"> /** Test for Bug 394057 **/ SimpleTest.waitForExplicitFinish(); var tableElement = document.getElementById("display"); var CC = SpecialPowers.Cc; var CI = SpecialPowers.Ci; var fe = CC["@mozilla.org/gfx/fontenumerator;1"].createInstance(CI.nsIFontEnumerator); var serifFonts = fe.EnumerateFonts("x-western", "serif", {}); var monospaceFonts = fe.EnumerateFonts("x-western", "monospace", {}); function table_width_for_font(font) { tableElement.style.fontFamily = '"' + font + '"'; var result = tableElement.offsetWidth; tableElement.style.fontFamily = ""; return result; } var serifIdx = 0; var monospaceIdx = 0; var monospaceWidth, serifWidth; monospaceWidth = table_width_for_font(monospaceFonts[monospaceIdx]); for (serifIdx in serifFonts) { serifWidth = table_width_for_font(serifFonts[serifIdx]); if (serifWidth != monospaceWidth) break; } if (serifWidth == monospaceWidth) { for (monospaceIdx in monospaceFonts) { monospaceWidth = table_width_for_font(monospaceFonts[monospaceIdx]); if (serifWidth != monospaceWidth) break; } } isnot(serifWidth, monospaceWidth, "can't find serif and monospace fonts of different width"); SpecialPowers.pushPrefEnv({'set': [['font.name.serif.x-western', serifFonts[serifIdx]]]}, step2); var serifWidthFromPref; function step2() { serifWidthFromPref = tableElement.offsetWidth; SpecialPowers.pushPrefEnv({'set': [['font.name.serif.x-western', monospaceFonts[monospaceIdx]]]}, step3); } var monospaceWidthFromPref; function step3() { monospaceWidthFromPref = tableElement.offsetWidth; is(serifWidthFromPref, serifWidth, "changing font pref should change width of table (serif)"); is(monospaceWidthFromPref, monospaceWidth, "changing font pref should change width of table (monospace)"); SimpleTest.finish(); } </script> </pre> </body> </html>