RelativeColorSandbox/index.html at main · david-risney/RelativeColorSandbox · GitHub

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<html>
    <head>
        <title>Relative Color Sandbox</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <link rel="icon" type="image/x-icon" href="favicon.ico">
        <style>
            .borderless, html, body {
                margin: 0;
                padding: 0;
                border: 0;
            }

            body {
                font-family: sans-serif;
                background-color: #f4f4f4;
            }

            .hidden {
                display: none;
            }

            @media screen and (max-width: 810px) {
                body {
                    margin-left: 0;
                    margin-right: 0;
                }
                td {
                    width: 80px;
                    height: 80px;
                }
            }

            @media screen and (min-width: 811px) {
                body {
                    margin-top: 4em;
                    margin-left: 10em;
                    margin-right: 10em;
                }
                td {
                    width: 100px;
                    height: 100px;
                }
            }
        </style>
        <script src="https://cdn.jsdelivr.net/npm/baseline-status@1/baseline-status.min.js" type="module"></script>
        <script type="module" src="./simple-color-picker.js"></script>
    </head>
    <body>
        <header>
            <h1>Relative Color Sandbox <baseline-status featureId="relative-color"></baseline-status></h1>
        </header>
        <main>
            <div id="colorTableContainer">
            </div>
            <simple-color-picker class="hidden" id="colorEditor" value="#00ff00"></simple-color-picker>
        </main>
        <script>
// This sets up a table for visualizing relative color CSS.
function getCachedValue(name, defaultValue) {
    let storedValueJson = localStorage.getItem(name);
    let value = defaultValue;
    if (storedValueJson) {
        try {
            value = JSON.parse(storedValueJson);
        } catch (e) {
            console.error(`Error parsing stored value for ${name}:`, e);
            localStorage.removeItem(name);
        }
    }

    return value;
}

let sourceColors = getCachedValue("sourceColors", ['rgb(0, 255, 0)', 'rgb(0, 128, 220)', 'rgb(100, 0, 100)', 'rgb(200, 0, 0)']);
let relativeColors = getCachedValue("relativeColors", ['hsl(from <color> h 20 l)', 'lch(from <color> calc(l + 20) c h)', 'lch(from <color> calc(l - 20) c h)', 'hsl(from <color> calc(h + 180) s l)']);

function cacheColors() {
    localStorage.setItem("sourceColors", JSON.stringify(sourceColors));
    localStorage.setItem("relativeColors", JSON.stringify(relativeColors));
}

function addRelativeColor(style) {
    relativeColors.push(style);
    dataToHtml();
}

function addSourceColor(color) {
    sourceColors.push(color);
    dataToHtml();
}

function getCellInfo(tableRowIdx, tableColIdx) {
    const dataInfo = tableRowColToInfo(tableRowIdx, tableColIdx);
    let text = "";
    let backgroundColor = "rgba(255, 255, 255, 0)";
    const sourceColor = sourceColors[dataInfo.sourceColorIdx];
    const relativeColor = relativeColors[dataInfo.relativeColorIdx];
    if (dataInfo.isRelativeColor) {
        // Top row of relative color styles
        text = relativeColor;
    } else if (dataInfo.isAddRelativeColor) {
        // Top right add button
        text = "Add Relative Color";
        backgroundColor = "lightgray";
    } else if (dataInfo.isSourceColor) {
        // Left column of source colors
        text = sourceColor;
        backgroundColor = sourceColor;
    } else if (dataInfo.isResultColors) {
        // Color cells in the middle
        backgroundColor = relativeColor.replace("<color>", sourceColor);
    } else if (dataInfo.isRemoveSourceColor) {
        // Right column remove buttons
        text = "Remove Color";
    } else if (dataInfo.isRemoveRelativeColor) {
        // Bottom row remove relative color buttons
        text = "Remove Relative Color";
    } else if (dataInfo.isAddSourceColor) {
        // Bottom left add button
        text = "Add Color";
        backgroundColor = "lightgray";
    }
    return { text, backgroundColor };
}

let selectionContext = {
    rowIdx: -1,
    colIdx: -1,
    clearEventHandler: null
}

// This function maps from table position row/column to info about what that cell represents.
// The layout of the table is as follows:
// The upper left corner is empty
// The upper right corner is an "Add Relative Color" button
// The upper row (except corners) are the relative colors
// The bottom left corner is an "Add Color" button
// The left column (except corners) are the source colors
// The bottom right corner is empty
// The right column (except corners) are "Remove Color" buttons
// The bottom row (except corners) are "Remove Relative Color" buttons
// All the rest of the inner cells are the result colors (the result of a source color run through a relative color)
function tableRowColToInfo(tableRowIdx, tableColIdx) {
    let isSourceColor = tableColIdx == 0 && tableRowIdx > 0 && tableRowIdx <= sourceColors.length;
    let isRemoveSourceColor = tableColIdx == relativeColors.length + 1 && tableRowIdx > 0 && tableRowIdx <= sourceColors.length;
    let sourceColorIdx = tableRowIdx - 1;
    let isRelativeColor = tableRowIdx == 0 && tableColIdx > 0 && tableColIdx <= relativeColors.length;
    let isRemoveRelativeColor = tableRowIdx == sourceColors.length + 1 && tableColIdx > 0 && tableColIdx <= relativeColors.length;
    let relativeColorIdx = tableColIdx - 1;
    let isAddSourceColor = tableRowIdx == sourceColors.length + 1 && tableColIdx == 0;
    let isAddRelativeColor = tableRowIdx == 0 && tableColIdx == relativeColors.length + 1;
    let isResultColors = tableRowIdx > 0 && tableRowIdx <= sourceColors.length && tableColIdx > 0 && tableColIdx <= relativeColors.length;

    return {
        isSourceColor,
        isRemoveSourceColor,
        sourceColorIdx,
        isRelativeColor,
        isRemoveRelativeColor,
        relativeColorIdx,
        isAddSourceColor,
        isAddRelativeColor,
        isResultColors,
    }
}

function cellSelected(tableRowIdx, tableColIdx) {
    const selectionInfo = tableRowColToInfo(tableRowIdx, tableColIdx);
    const cellChanged = (selectionContext.rowIdx != tableRowIdx ||
        selectionContext.colIdx != tableColIdx);

    if (selectionContext.clearEventHandler) {
        selectionContext.clearEventHandler();
        selectionContext.clearEventHandler = null;
    }
    selectionContext.rowIdx = tableRowIdx;
    selectionContext.colIdx = tableColIdx;

    if (selectionInfo.isRelativeColor) {
        // Top row of relative color styles
        const relativeColorIdx = selectionInfo.relativeColorIdx;
        relativeColors[relativeColorIdx] = prompt("Edit the relative color style:", relativeColors[relativeColorIdx]) || relativeColors[relativeColorIdx];
        dataToHtml();
    } else if (selectionInfo.isAddRelativeColor) {
        // Generate random relative style
        const style = `hsl(from <color> calc(h + ${Math.floor(Math.random() * 360)}) 100 50)`;
        addRelativeColor(style);
    } else if (selectionInfo.isSourceColor) {
        // Left column of source colors
        // When clicking a source color, it selects it and opens the color picker
        // Clicking the same source color again closes the color picker
        const colorPicker = document.getElementById('colorEditor');
        if (colorPicker.classList.contains('hidden')) {
            colorPicker.classList.remove('hidden');
        }

        const sourceColorIdx = selectionInfo.sourceColorIdx;
        colorPicker.value = sourceColors[sourceColorIdx];

        const onColorChange = (event) => {
            sourceColors[sourceColorIdx] = event.detail.value;
            dataToHtml();
        };
        colorPicker.addEventListener('input', onColorChange);
        selectionContext.clearEventHandler = () => {
            colorPicker.removeEventListener('input', onColorChange);
        };
    } else if (selectionInfo.isAddSourceColor) {
        // Add a random color and then open the color picker for it
        const randomColor = `hsl(${Math.floor(Math.random() * 360)}, 100%, 50%)`;
        addSourceColor(randomColor);
        cellSelected(sourceColors.length, 0);
    } else if (selectionInfo.isRemoveSourceColor) {
        // Remove the source color
        const sourceColorIdx = selectionInfo.sourceColorIdx;
        sourceColors.splice(sourceColorIdx, 1);
        dataToHtml();
    } else if (selectionInfo.isRemoveRelativeColor) {
        // Remove the relative color
        const relativeColorIdx = selectionInfo.relativeColorIdx;
        relativeColors.splice(relativeColorIdx, 1);
        dataToHtml();
    }
}

function dataToHtml() {
    cacheColors();
    if (sourceColors.length == 0 || relativeColors.length == 0) {
        return;
    }
    const colorTableContainer = document.getElementById('colorTableContainer');
    colorTableContainer.innerHTML = "";
    const table = document.createElement('table');
    colorTableContainer.appendChild(table);

    for (var rowIdx = 0; rowIdx < sourceColors.length + 2; ++rowIdx) {
        const tr = document.createElement('tr');
        table.appendChild(tr);
        for (var colIdx = 0; colIdx < relativeColors.length + 2; ++colIdx) {
            const td = document.createElement('td');
            tr.appendChild(td);

            const { text, backgroundColor } = getCellInfo(rowIdx, colIdx);
            td.textContent = text;
            td.style.backgroundColor = backgroundColor;
            td.addEventListener('click', ((rowIdx, colIdx) => {
                cellSelected(rowIdx, colIdx);
            }).bind(this, rowIdx, colIdx));
        }
    }
}

dataToHtml();
        </script>
    </body>
</html>