gistfile1.txt

YAHOO.widget.Overlay.prototype.configVisible = function (type, args, obj) {

            var visible = args[0],
                currentVis = Dom.getStyle(this.element, "visibility"),
                effect = this.cfg.getProperty("effect"),
                effectInstances = [],
                isMacGecko = (this.platform == "mac" && UA.gecko),
                alreadySubscribed = Config.alreadySubscribed,
                eff, ei, e, i, j, k, h,
                nEffects,
                nEffectInstances;

            if (currentVis == "inherit") {
                e = this.element.parentNode;

                while (e.nodeType != 9 && e.nodeType != 11) {
                    currentVis = Dom.getStyle(e, "visibility");

                    if (currentVis != "inherit") {
                        break;
                    }

                    e = e.parentNode;
                }

                if (currentVis == "inherit") {
                    currentVis = "visible";
                }
            }

            if (effect) {
                if (effect instanceof Array) {
                    nEffects = effect.length;

                    for (i = 0; i < nEffects; i++) {
                        eff = effect[i];
                        effectInstances[effectInstances.length] = 
                            eff.effect(this, eff.duration);

                    }
                } else {
                    effectInstances[effectInstances.length] = 
                        effect.effect(this, effect.duration);
                }
            }

            if (visible) { // Show
                if (isMacGecko) {
                    this.showMacGeckoScrollbars();
                }

                if (effect) { // Animate in
                    if (visible) { // Animate in if not showing
                        if (currentVis != "visible" || currentVis === "") {
                            this.beforeShowEvent.fire();
                            nEffectInstances = effectInstances.length;

                            for (j = 0; j < nEffectInstances; j++) {
                                ei = effectInstances[j];
                                if (j === 0 && !alreadySubscribed(
                                        ei.animateInCompleteEvent, 
                                        this.showEvent.fire, this.showEvent)) {

                                    /*
                                         Delegate showEvent until end 
                                         of animateInComplete
                                    */

                                    ei.animateInCompleteEvent.subscribe(
                                     this.showEvent.fire, this.showEvent, true);
                                }
                                ei.animateIn();
                            }
                        }
                    }
                } else { // Show
                    if (currentVis != "visible" || currentVis === "") {
                        this.beforeShowEvent.fire();

                        this._setDomVisibility(true);

                        this.cfg.refireEvent("iframe");
                        this.showEvent.fire();
                    } else {
                        this._setDomVisibility(true);
                    }
                }
            } else { // Hide

                if (isMacGecko) {
                    this.hideMacGeckoScrollbars();
                }

                if (effect) { // Animate out if showing
                    if (currentVis == "visible") {
                        // NEW: Wrap in "if", so subscribers can return false to prevent hide
                        if (this.beforeHideEvent.fire()) {

                            nEffectInstances = effectInstances.length;
                            for (k = 0; k < nEffectInstances; k++) {
                                h = effectInstances[k];
    
                                if (k === 0 && !alreadySubscribed(
                                    h.animateOutCompleteEvent, this.hideEvent.fire, 
                                    this.hideEvent)) {
    
                                /*
                                     Delegate hideEvent until end 
                                     of animateOutComplete
                                */
    
                                    h.animateOutCompleteEvent.subscribe(
                                        this.hideEvent.fire, this.hideEvent, true);
    
                                }
                                h.animateOut();
                            }
                        }
                    } else if (currentVis === "") {
                        this._setDomVisibility(false);
                    }

                } else { // Simple hide

                    if (currentVis == "visible" || currentVis === "") {
                        // NEW: Wrap in "if", so subscribers can return false to prevent hide.
                        if (this.beforeHideEvent.fire()) {
                            this._setDomVisibility(false);
                            this.hideEvent.fire();
                        }
                    } else {
                        this._setDomVisibility(false);
                    }
                }
            }
        };