/**
* Tests whether this StyleSheet matches the specified variants. Returns a number indicating the
* specificity of the match. Zero means there is no match. Larger numbers indicate better matches.
* The value returned by compareVariants is used to sort style sheets according to precedence.
*
* @param mode
*/
public int compareVariants(
Locale locale,
int direction,
TrinidadAgent agent,
int mode,
AccessibilityProfile accessibilityProfile) {
int localeMatch = _compareLocale(locale);
if (localeMatch == 0) return 0;
int directionMatch = _compareDirection(direction);
if (directionMatch == 0) return 0;
int browser = agent.getAgentApplication();
int browserAndVersionMatch = _compareBrowserAndVersion(browser, agent);
if (browserAndVersionMatch == 0) return 0;
int modeMatch = _compareMode(mode);
if (modeMatch == 0) return 0;
int osMatch = _compareOS(agent.getAgentOS());
if (osMatch == 0) return 0;
int accessibilityMatch = _compareAccessibility(accessibilityProfile);
if (accessibilityMatch == 0) return 0;
return (localeMatch | browserAndVersionMatch | osMatch | accessibilityMatch);
}
// Compares the browser and its version against the supported variants
private int _compareBrowserAndVersion(int browser, TrinidadAgent agent) {
// If we don't have a browser specified, we match anything
if (_agentVersions.isEmpty()) return _BROWSER_UNKNOWN_MATCH;
// On the other hand, if we do have a browser specified, but
// the client browser is not known, we don't have a match
if (browser == TrinidadAgent.APPLICATION_UNKNOWN) return 0;
// If we have browser exact match, compare versions
Integer browserNum = Integer.valueOf(browser);
if (_agentVersions.containsKey(browserNum)) {
Set<Version> versions = _agentVersions.get(browserNum);
if (versions.isEmpty()) return _BROWSER_EXACT_MATCH | _VERSION_UNKNOWN_MATCH;
Version version = new Version(agent.getAgentVersion());
for (Version av : versions) {
if (av.compareTo(version) == 0) {
return _BROWSER_EXACT_MATCH | _VERSION_EXACT_MATCH;
}
}
return 0;
}
return 0;
}