Calendar: keyboard support bug when there is a disable date next to the focused date

[nagisaando]

Describe the bug

Hello,

Calendar keyboard support works great so far, but there is an issue when there is disable days/date.
For example, when the key arrow is clicked and there is a disable date next to the focused element, it will move to next month.
Instead, it should skip the disable date and move to the next focusable date from the row otherwise it's pretty difficult to select the specific date for those who use the keyboard.

This issue is happening because onDateCellKeydown function in Calendar component, is checking the next date is focusable instead of checking the first/second half of the focused date.

// Calendar.vue

              onDateCellKeydown(event, date, groupIndex) {
                .
                .
                .
                case 'ArrowLeft': {
                    cellContent.tabIndex = '-1';
                    let prevCell = cell.previousElementSibling;
                    if (prevCell) {
                        let focusCell = prevCell.children[0];
                        if (DomHandler.hasClass(focusCell, 'p-disabled')) { <=================
                            this.navigateToMonth(event, true, groupIndex);
                        } else {
                            focusCell.tabIndex = '0';
                            focusCell.focus();
                        }
                    } else {
                        this.navigateToMonth(event, true, groupIndex);
                    }
                    event.preventDefault();
                    break;
                }
                .
                .

Reproducer

https://codesandbox.io/s/suspicious-grass-isicm2?file=/src/App.vue

PrimeVue version

3.16.2

Vue version

3.x

Language

ES6

Build / Runtime

Vite

Browser(s)

No response

Steps to reproduce the behavior

1. Click Calendar input
2. Click the arrow down to focus a date from the Calendar
3. Click the arrow right where there is order as focused date | disable date | focusable date |

Expected behavior

When the key arrow is clicked and if there is a disable date next to the focused date, it should skip the disable date and move to the next focusable date from the row and if there is no focusable item, it should move to next/previous month.

[tugcekucukoglu]

Fixed via #3071