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Bug 515455 - "Backward compatibility when layout.css.devPixelsPerPx is an integer" [r=roc]

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This commit is contained in:
Sylvain Pasche 2009-09-10 14:43:41 -04:00
parent 4c7496df0a
commit 20e86c2b27
1 changed files with 23 additions and 3 deletions
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26
gfx/src/thebes/nsThebesDeviceContext.cpp
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@ -628,10 +628,30 @@ nsThebesDeviceContext::SetDPI()
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs) {
const char *prefName = "layout.css.devPixelsPerPx";
PRInt32 prefType = nsIPrefBranch::PREF_INVALID;
PRInt32 prefInt;
nsXPIDLCString prefString;
nsresult rv = prefs->GetCharPref("layout.css.devPixelsPerPx", getter_Copies(prefString));
if (NS_SUCCEEDED(rv)) {
prefDevPixelsPerCSSPixel = static_cast<float>(atof(prefString));
nsresult rv;
prefs->GetPrefType(prefName, &prefType);
switch (prefType) {
case nsIPrefBranch::PREF_INT:
// Backward compatibility for applications that haven't migrated
// to a string yet.
rv = prefs->GetIntPref(prefName, &prefInt);
if (NS_SUCCEEDED(rv)) {
prefDevPixelsPerCSSPixel = static_cast<float>(prefInt);
}
break;
case nsIPrefBranch::PREF_STRING:
rv = prefs->GetCharPref(prefName, getter_Copies(prefString));
if (NS_SUCCEEDED(rv) && !prefString.IsEmpty()) {
prefDevPixelsPerCSSPixel = static_cast<float>(atof(prefString));
}
break;
}
}