_dispatchSwipeBehavior: function ItemEventsHandler_dispatchSwipeBehavior()

in src/Clients/Web/winjs/js/winjs.js [33548:33620]

• 66 lines of code
• 28 McCabe index (conditional complexity)

                _dispatchSwipeBehavior: function ItemEventsHandler_dispatchSwipeBehavior(manipulationState) {
                    if (this._site.pressedEntity.type === _UI.ObjectType.groupHeader ||
                        this._site.swipeBehavior !== _UI.SwipeBehavior.select) {
                        return;
                    }
                    this._site.selection._pivot = _Constants._INVALID_INDEX;
                    if (this._site.pressedItemBox) {
                        var pressedIndex = this._site.pressedEntity.index;
                        if (this._swipeBehaviorState !== manipulationState) {
                            if (manipulationState === MSManipulationEventStates.MS_MANIPULATION_STATE_DRAGGING && this._canSelect) {
                                this._animateSelectionChange(this._site.selection._isIncluded(pressedIndex));
                                this._removeSelectionHint(this._selectionHint);
                            } else if (manipulationState === MSManipulationEventStates.MS_MANIPULATION_STATE_PRESELECT) {
                                _WriteProfilerMark("WinJS.UI._ItemEventsHandler:crossSlidingStarted,info");
                                var site = this._site,
                                    pressedElement = site.itemAtIndex(pressedIndex),
                                    selected = site.selection._isIncluded(pressedIndex);

                                if (this._selfRevealGesture) {
                                    this._selfRevealGesture.finishAnimation();
                                    this._selfRevealGesture = null;
                                } else if (this._canSelect) {
                                    this._prepareItem(this._site.pressedEntity, pressedElement, selected);
                                }

                                if (this._swipeBehaviorState !== MSManipulationEventStates.MS_MANIPULATION_STATE_SELECTING) {
                                    if (this._site.animatedElement && _ElementUtilities.hasClass(this._site.animatedElement, _Constants._pressedClass)) {
                                        this._site.animatedDownPromise && this._site.animatedDownPromise.cancel();
                                        _ElementUtilities.removeClass(this._site.animatedElement, _Constants._pressedClass);
                                        this._removeTransform(this._site.animatedElement, this._site.animatedElementScaleTransform);
                                    }

                                    this._showSelectionHintCheckmark();
                                } else {
                                    this._animateSelectionChange(this._site.selection._isIncluded(pressedIndex));
                                }
                            } else if (manipulationState === MSManipulationEventStates.MS_MANIPULATION_STATE_COMMITTED) {
                                _WriteProfilerMark("WinJS.UI._ItemEventsHandler:crossSlidingCompleted,info");
                                var site = this._site,
                                    selection = site.selection,
                                    swipeBehaviorSelectionChanged = this._swipeBehaviorSelectionChanged,
                                    swipeBehaviorSelected = this.swipeBehaviorSelected;

                                if (this._swipeBehaviorState === MSManipulationEventStates.MS_MANIPULATION_STATE_SELECTING && swipeBehaviorSelectionChanged) {
                                    if (this._selectionAllowed() && site.swipeBehavior === _UI.SwipeBehavior.select) {
                                        if (site.selectionMode === _UI.SelectionMode.single) {
                                            if (swipeBehaviorSelected) {
                                                selection.set(pressedIndex);
                                            } else if (selection._isIncluded(pressedIndex)) {
                                                selection.remove(pressedIndex);
                                            }
                                        } else {
                                            if (swipeBehaviorSelected) {
                                                selection.add(pressedIndex);
                                            } else if (selection._isIncluded(pressedIndex)) {
                                                selection.remove(pressedIndex);
                                            }
                                        }
                                    }
                                }

                                // snap back and remove addional elements
                                this._endSwipeBehavior();
                            } else if (manipulationState === MSManipulationEventStates.MS_MANIPULATION_STATE_SELECTING && this._canSelect) {
                                this._animateSelectionChange(!this._site.selection._isIncluded(pressedIndex));
                            } else if (this._swipeBehaviorState === MSManipulationEventStates.MS_MANIPULATION_STATE_SELECTING && this._canSelect) {
                                this._animateSelectionChange(this._site.selection._isIncluded(pressedIndex), (manipulationState === MSManipulationEventStates.MS_MANIPULATION_STATE_CANCELLED));
                            }
                        }
                    }

                    this._swipeBehaviorState = manipulationState;
                },