calendar/c2.html at master · SigridCheng/calendar · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>Monthly Calendar</title>
    <meta charset="UTF-8">
    <style>
        .calendar-container {
            max-width: 300px;  /* Increased size */
            margin: 20px auto;
            font-family: Arial, sans-serif;
            font-size: 14px;   /* Increased size */
        }

        .controls {
            margin-bottom: 10px;
            display: flex;
            gap: 5px;
            align-items: center;
        }

        select {
            font-size: 14px;
            padding: 3px;
        }

        .month-display {
            font-weight: bold;
            font-size: 1.2em;
            margin-bottom: 5px;
            text-align: center;
        }

        .calendar-grid {
            display: grid;
            grid-template-columns: repeat(7, 1fr) 45px; /* Only right week column */
            gap: 2px;
        }

        .calendar-header {
            padding: 5px;
            text-align: center;
            font-weight: bold;
            border: 1px solid #ccc;
            font-size: 13px;
        }

        .calendar-day {
            padding: 5px;
            text-align: center;
            border: 1px solid #ccc;
            min-height: 20px;
            line-height: 20px;
        }

        .past-day {
            text-decoration: line-through;
            color: #999;
        }

        .other-month {
            color: #ccc;
        }

        .today {
            font-weight: bold;
        }

        .embed-button {
            padding: 6px 12px;
            background-color: #4CAF50;
            color: white;
            border: none;
            border-radius: 3px;
            cursor: pointer;
            margin: 5px;
            font-size: 14px;
        }

        .arrow {
            font-size: 22px;
            cursor: pointer;
            user-select: none;
            padding: 0 8px;
        }

        .hidden {
            display: none;
        }

        .week-display {
            font-size: 12px;
            text-align: center;
            padding: 5px;
            border: 1px solid #ccc;
            min-height: 20px;
            line-height: 20px;
        }
        .arrow {
            font-size: 22px;
            cursor: pointer;
            user-select: none;
            position: absolute;
            top: 100px;
            transform: translateY(-50%);
            padding: 10px;
            border-radius: 50%;
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .prev {
            left: -30px;
        }

        .next {
            right: -32px;
        }

        /* Update calendar controls style */
        #calendar-controls {
            position: relative;
            height: 0;
            margin: 0;
        }

        .month-display {
            text-align: center;
            margin: 10px 0;
        }
    </style>
</head>
<body>
    <div class="calendar-container">
        <div id="initial-controls" class="controls">
            <select id="startDay">
                <option value="0">Start from Sunday</option>
                <option value="1">Start from Monday</option>
            </select>
            <select id="background">
                <option value="#ffffff">White Grid</option>
                <option value="#f0f8ff">Light Blue Grid</option>
                <option value="#f5f5dc">Beige Grid</option>
                <option value="#e6ffe6">Light Green Grid</option>
                <option value="#e6e6fa">Light Purple Grid</option>
            </select>
            <button id="embedButton" class="embed-button">Embed</button>
        </div>

        <div class="month-display"></div>
        <div id="calendar-controls" class="controls hidden">
            <span class="arrow prev">&lt;</span>
            <div class="month-display"></div>
            <span class="arrow next">&gt;</span>
        </div>

        <div id="calendar"></div>
    </div>

    <script>
        document.addEventListener("DOMContentLoaded", () => {
            const calendar = document.getElementById("calendar");
            const startDaySelect = document.getElementById("startDay");
            const backgroundSelect = document.getElementById("background");
            const embedButton = document.getElementById("embedButton");
            const initialControls = document.getElementById("initial-controls");
            const calendarControls = document.getElementById("calendar-controls");
            const monthDisplay = document.querySelector(".month-display");


            let currentMonth = new Date().getMonth();
            let currentYear = new Date().getFullYear();

            function getWeekNumber(date) {
                const firstDayOfYear = new Date(date.getFullYear(), 0, 1);
                const pastDaysOfYear = (date - firstDayOfYear) / 86400000;
                return Math.ceil((pastDaysOfYear + firstDayOfYear.getDay() + 1) / 7);
            }

            function applyGridColor() {
                const gridColor = backgroundSelect.value;
                document.querySelectorAll('.calendar-day, .calendar-header, .week-display').forEach(el => {
                    el.style.backgroundColor = gridColor;
                });
            }


            function generateCalendar() {
                const startDay = parseInt(startDaySelect.value);
                const today = new Date();
                const date = new Date(currentYear, currentMonth, 1);
                const monthNames = ["January", "February", "March", "April", "May", "June",
                    "July", "August", "September", "October", "November", "December"];

                monthDisplay.textContent = `${monthNames[currentMonth]} ${currentYear}`;

                let calendarHTML = '<div class="calendar-grid">';

                // Add day headers
                const days = startDay === 0
                    ? ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]
                    : ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"];

                days.forEach(day => {
                    calendarHTML += `<div class="calendar-header">${day}</div>`;
                });

                // Add "Week" header
                calendarHTML += '<div class="calendar-header">Week</div>';

                let firstDay = date.getDay();
                if (startDay === 1) {
                    firstDay = firstDay === 0 ? 6 : firstDay - 1;
                }

                const lastDay = new Date(currentYear, currentMonth + 1, 0).getDate();
                const prevMonthLastDay = new Date(currentYear, currentMonth, 0).getDate();

                let dayCount = 1;
                let nextMonthDay = 1;
                const totalDays = firstDay + lastDay;
                const totalRows = Math.ceil(totalDays / 7);

                for (let row = 0; row < totalRows; row++) {
                    for (let col = 0; col < 7; col++) {
                        const dayPosition = row * 7 + col;
                        const dayIndex = dayPosition - firstDay;

                        if (dayIndex < 0) {
                            const prevDay = prevMonthLastDay + dayIndex + 1;
                            calendarHTML += `<div class="calendar-day other-month">${prevDay}</div>`;
                        } else if (dayIndex >= lastDay) {
                            calendarHTML += `<div class="calendar-day other-month">${nextMonthDay++}</div>`;
                        } else {
                            const currentDate = dayIndex + 1;
                            const isToday = currentDate === today.getDate() &&
                                          currentMonth === today.getMonth() &&
                                          currentYear === today.getFullYear();
                            const isPast = new Date(currentYear, currentMonth, currentDate) < new Date(today.getFullYear(), today.getMonth(), today.getDate());

                            calendarHTML += `<div class="calendar-day${isToday ? ' today' : ''}${isPast ? ' past-day' : ''}">${currentDate}</div>`;
                        }
                    }

                    // Add week number
                    const weekDate = new Date(currentYear, currentMonth, dayCount - firstDay + (row * 7));
                    const weekNum = getWeekNumber(weekDate);
                    calendarHTML += `<div class="week-display">${weekNum}</div>`;
                }

                calendarHTML += '</div>';
                calendar.innerHTML = calendarHTML;
                applyGridColor();
            }

            function changeMonth(delta) {
                currentMonth += delta;
                if (currentMonth > 11) {
                    currentMonth = 0;
                    currentYear++;
                } else if (currentMonth < 0) {
                    currentMonth = 11;
                    currentYear--;
                }
                generateCalendar();
                updateURL();
            }

            function updateURL() {
                const url = new URL(window.location.href);
                url.searchParams.set('startDay', startDaySelect.value);
                url.searchParams.set('background', backgroundSelect.value);
                // url.searchParams.set('month', currentMonth);
                // url.searchParams.set('year', currentYear);
                window.history.pushState({}, '', url.toString());
            }

            embedButton.addEventListener("click", () => {
                const embedUrl = window.location.href;
                navigator.clipboard.writeText(embedUrl).then(() => {
                    initialControls.classList.add("hidden");
                    calendarControls.classList.remove("hidden");
                    updateURL();
                });
            });

            // Check URL parameters on load
            const urlParams = new URLSearchParams(window.location.search);
            if (urlParams.has('startDay') && urlParams.has('background')) {
                startDaySelect.value = urlParams.get('startDay');
                backgroundSelect.value = urlParams.get('background');
                // currentMonth = parseInt(urlParams.get('month')) || currentMonth;
                // currentYear = parseInt(urlParams.get('year')) || currentYear;

                initialControls.classList.add("hidden");
                calendarControls.classList.remove("hidden");
            }

            document.querySelector(".prev").addEventListener("click", () => changeMonth(-1));
            document.querySelector(".next").addEventListener("click", () => changeMonth(1));

            generateCalendar();

            startDaySelect.addEventListener("change", generateCalendar);
            backgroundSelect.addEventListener("change", generateCalendar);
        });
    </script>
</body>
</html>