/**
* Add a new rule.
*
* <p>Several cases can occur :
*
* <ul>
* <li>The rule to add has an ID or class and the rule does not yet exists and is not an event
* rule : add it directly.
* <li>If the rule has an ID or class but the rule already exists, augment to already existing
* rule.
* <li>If the rule has no ID or class and is not an event, augment the default style.
* <li>If the rule is an event, the corresponding normal rule is searched, if it does not
* exists, it is created then or else, the event is added to the found rule.
* </ul>
*
* @param newRule The rule to add or copy.
* @return It the rule added augments an existing rule, this existing rule is returned, else
* null is returned.
*/
protected Rule addRule(Rule newRule) {
Rule oldRule = null;
if (newRule.selector.getPseudoClass() != null) {
oldRule = addEventRule(newRule);
} else if (newRule.selector.getId() != null) {
oldRule = byId.get(newRule.selector.getId());
if (oldRule != null) {
oldRule.getStyle().augment(newRule.getStyle());
} else {
byId.put(newRule.selector.getId(), newRule);
newRule.getStyle().reparent(defaultRule);
}
} else if (newRule.selector.getClazz() != null) {
oldRule = byClass.get(newRule.selector.getClazz());
if (oldRule != null) {
oldRule.getStyle().augment(newRule.getStyle());
} else {
byClass.put(newRule.selector.getClazz(), newRule);
newRule.getStyle().reparent(defaultRule);
}
} else {
oldRule = defaultRule;
defaultRule.getStyle().augment(newRule.getStyle());
newRule = defaultRule;
}
// That's it.
return oldRule;
}
protected Rule addEventRule(Rule newRule) {
Rule parentRule = null;
if (newRule.selector.getId() != null) {
parentRule = byId.get(newRule.selector.getId());
if (parentRule == null) {
parentRule =
addRule(
new Rule(
new Selector(
newRule.selector.getType(),
newRule.selector.getId(),
newRule.selector.getClazz())));
}
} else if (newRule.selector.getClazz() != null) {
parentRule = byClass.get(newRule.selector.getClazz());
if (parentRule == null) {
parentRule =
addRule(
new Rule(
new Selector(
newRule.selector.getType(),
newRule.selector.getId(),
newRule.selector.getClazz())));
}
} else {
parentRule = defaultRule;
}
newRule.getStyle().reparent(parentRule);
parentRule.getStyle().addAlternateStyle(newRule.selector.getPseudoClass(), newRule);
return parentRule;
}
/**
* Create the default rules. This method is the place to set defaults for specific element types.
* This is here that the edge width is reset to one, since the default width is larger. The
* default z index that is different for every class of element is also set here.
*/
protected void initRules() {
defaultRule = new Rule(new Selector(Selector.Type.ANY), null);
defaultRule.getStyle().setDefaults();
graphRules.defaultRule = new Rule(new Selector(Selector.Type.GRAPH), defaultRule);
nodeRules.defaultRule = new Rule(new Selector(Selector.Type.NODE), defaultRule);
edgeRules.defaultRule = new Rule(new Selector(Selector.Type.EDGE), defaultRule);
spriteRules.defaultRule = new Rule(new Selector(Selector.Type.SPRITE), defaultRule);
graphRules.defaultRule.getStyle().setValue("padding", new Values(Style.Units.PX, 30));
edgeRules.defaultRule.getStyle().setValue("shape", StyleConstants.Shape.LINE);
edgeRules.defaultRule.getStyle().setValue("size", new Values(Style.Units.PX, 1));
edgeRules.defaultRule.getStyle().setValue("z-index", new Integer(1));
nodeRules.defaultRule.getStyle().setValue("z-index", new Integer(2));
spriteRules.defaultRule.getStyle().setValue("z-index", new Integer(3));
Colors colors = new Colors();
colors.add(Color.WHITE);
graphRules.defaultRule.getStyle().setValue("fill-color", colors);
graphRules.defaultRule.getStyle().setValue("stroke-mode", StrokeMode.NONE);
for (StyleSheetListener listener : listeners) {
listener.styleAdded(defaultRule, defaultRule);
listener.styleAdded(graphRules.defaultRule, graphRules.defaultRule);
listener.styleAdded(nodeRules.defaultRule, nodeRules.defaultRule);
listener.styleAdded(edgeRules.defaultRule, edgeRules.defaultRule);
listener.styleAdded(spriteRules.defaultRule, spriteRules.defaultRule);
}
// for( StyleSheetListener listener: listeners )
// listener.styleAdded( defaultRule, defaultRule );
// for( StyleSheetListener listener: listeners )
// listener.styleAdded( graphRules.defaultRule, graphRules.defaultRule
// );
// for( StyleSheetListener listener: listeners )
// listener.styleAdded( nodeRules.defaultRule, nodeRules.defaultRule );
// for( StyleSheetListener listener: listeners )
// listener.styleAdded( edgeRules.defaultRule, edgeRules.defaultRule );
// for( StyleSheetListener listener: listeners )
// listener.styleAdded( spriteRules.defaultRule, spriteRules.defaultRule
// );
}