components/sam-prompter.json

{
  "id": "sam-prompter",
  "name": "SAM Prompter",
  "description": "Interactive SAM prompt input and mask visualization",
  "author": "hysts",
  "tags": [
    "sam",
    "interactive segmentation"
  ],
  "html_template": "<div class=\"sam-prompter-container\">\n  <script type=\"application/json\" class=\"prompt-data\">${value}</script>\n  <div class=\"toolbar\">\n    <div class=\"toolbar-left\">\n      <div class=\"object-tabs\"></div>\n      <button class=\"sp-btn add-object-btn\" title=\"Add Object (N)\">+ Add</button>\n    </div>\n    <div class=\"toolbar-right\">\n      <button class=\"sp-btn undo-btn\" title=\"Undo (Z)\">Undo</button>\n      <button class=\"sp-btn clear-btn\" title=\"Clear Object\">Clear</button>\n      <button class=\"sp-btn clear-all-btn\" title=\"Clear All\">Clear All</button>\n      <button class=\"sp-btn image-toggle-btn active\" title=\"Toggle Image (I)\">Image</button>\n      <button class=\"sp-btn mask-toggle-btn active\" title=\"Toggle Masks (M)\">Masks</button>\n      <button class=\"sp-btn cutout-btn\" title=\"Cutout View (C)\">Cutout</button>\n      <button class=\"sp-btn move-btn\" title=\"Move Mode (Space)\"><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M18 11V6a2 2 0 0 0-2-2 2 2 0 0 0-2 2v0\"/><path d=\"M14 10V4a2 2 0 0 0-2-2 2 2 0 0 0-2 2v2\"/><path d=\"M10 10.5V6a2 2 0 0 0-2-2 2 2 0 0 0-2 2v8\"/><path d=\"M18 8a2 2 0 1 1 4 0v6a8 8 0 0 1-8 8h-2c-2.8 0-4.5-.86-5.99-2.34l-3.6-3.6a2 2 0 0 1 2.83-2.82L7 16\"/></svg></button>\n      <button class=\"sp-btn settings-btn active\" title=\"View Settings (V)\">&#9881;</button>\n      <button class=\"sp-btn maximize-btn\" title=\"Maximize (F)\">&#x26F6;</button>\n      <button class=\"sp-btn help-btn\" title=\"Help (?)\">?</button>\n      <button class=\"sp-btn clear-image-btn\" title=\"Remove image\">&times;</button>\n    </div>\n  </div>\n  <div class=\"settings-bar\">\n    <div class=\"settings-group\">\n      <span class=\"settings-label\">Object color</span>\n      <div class=\"color-swatches obj-color-swatches\"></div>\n    </div>\n    <div class=\"settings-group\">\n      <span class=\"settings-label\">Point size</span>\n      <input type=\"range\" class=\"sp-slider point-size-slider\" min=\"3\" max=\"20\" step=\"1\">\n      <span class=\"slider-value point-size-value\"></span>\n    </div>\n    <div class=\"settings-group\">\n      <span class=\"settings-label\">Box outline</span>\n      <input type=\"range\" class=\"sp-slider box-line-width-slider\" min=\"1\" max=\"8\" step=\"0.5\">\n      <span class=\"slider-value box-line-width-value\"></span>\n    </div>\n    <div class=\"settings-group\">\n      <span class=\"settings-label\">Mask opacity</span>\n      <input type=\"range\" class=\"sp-slider mask-opacity-slider\" min=\"0\" max=\"100\" step=\"1\">\n      <span class=\"slider-value mask-opacity-value\"></span>\n    </div>\n  </div>\n  <div class=\"canvas-wrapper\">\n    <canvas></canvas>\n    <div class=\"coord-display\"></div>\n    <div class=\"loading-indicator hidden\">\n      <div class=\"spinner\"></div>\n    </div>\n    <div class=\"drop-zone\">\n      <input type=\"file\" class=\"file-input\" accept=\"image/*\">\n      <span>Drop image here or click to upload</span>\n    </div>\n  </div>\n  <div class=\"help-overlay hidden\">\n    <div class=\"help-content\">\n      <h3>Keyboard Shortcuts</h3>\n      <table>\n        <tr><td><kbd>Left Click</kbd></td><td>Add foreground point</td></tr>\n        <tr><td><kbd>Right Click</kbd></td><td>Add background point</td></tr>\n        <tr><td><kbd>Left Drag</kbd></td><td>Draw bounding box</td></tr>\n        <tr><td><kbd>Alt + Click</kbd></td><td>Delete nearest point / box</td></tr>\n        <tr><td><kbd>1</kbd>\u2013<kbd>8</kbd></td><td>Switch object</td></tr>\n        <tr><td><kbd>N</kbd></td><td>Add new object</td></tr>\n        <tr><td><kbd>Z</kbd></td><td>Undo last prompt</td></tr>\n        <tr><td><kbd>Delete</kbd></td><td>Delete active object</td></tr>\n        <tr><td><kbd>H</kbd></td><td>Toggle active object visibility</td></tr>\n        <tr><td><kbd>M</kbd></td><td>Toggle mask display</td></tr>\n        <tr><td><kbd>Space</kbd> (hold)</td><td>Temporary move mode</td></tr>\n        <tr><td><kbd>Scroll</kbd></td><td>Zoom in/out</td></tr>\n        <tr><td><kbd>+</kbd> / <kbd>-</kbd> / <kbd>0</kbd></td><td>Zoom in / out / reset</td></tr>\n        <tr><td><kbd>Middle Drag</kbd></td><td>Pan</td></tr>\n        <tr><td><kbd>Double-click</kbd></td><td>Reset zoom (move mode)</td></tr>\n        <tr><td><kbd>V</kbd></td><td>Toggle view settings</td></tr>\n        <tr><td><kbd>I</kbd></td><td>Toggle image visibility</td></tr>\n        <tr><td><kbd>C</kbd></td><td>Toggle cutout view (foreground only)</td></tr>\n        <tr><td><kbd>?</kbd></td><td>Toggle help</td></tr>\n        <tr><td><kbd>F</kbd></td><td>Toggle maximize</td></tr>\n        <tr><td><kbd>Escape</kbd></td><td>Cancel box drawing / close help / exit maximize</td></tr>\n      </table>\n      <button class=\"sp-btn help-close-btn\">Close</button>\n    </div>\n  </div>\n</div>\n",
  "css_template": ".sam-prompter-container,\n.sam-prompter-container * {\n    box-sizing: border-box;\n}\n\n.sam-prompter-container {\n    position: relative;\n    width: 100%;\n    background: var(--background-fill-primary, #ffffff);\n    border: 1px solid var(--border-color-primary, #e0e0e0);\n    border-radius: 8px;\n    overflow: hidden;\n    font-family: var(--font, system-ui, sans-serif);\n    font-size: 13px;\n    color: var(--body-text-color, #333333);\n}\n\n/* Maximized state (class on element wrapper, outside morph scope) */\n&.sp-maximized .sam-prompter-container {\n    position: fixed;\n    top: 0;\n    left: 0;\n    width: 100vw;\n    height: 100vh;\n    z-index: 9999;\n    border-radius: 0;\n    display: flex;\n    flex-direction: column;\n}\n\n&.sp-maximized .canvas-wrapper {\n    flex: 1;\n    min-height: 0;\n    border-radius: 0;\n}\n\n&.sp-maximized .maximize-btn {\n    background: var(--color-accent, #2196F3);\n    color: #fff;\n    border-color: var(--color-accent, #2196F3);\n}\n\n/* Toolbar */\n.sam-prompter-container .toolbar {\n    display: flex;\n    align-items: center;\n    justify-content: space-between;\n    padding: 6px 8px;\n    gap: 6px;\n    background: var(--background-fill-secondary, #f7f7f7);\n    border-bottom: 1px solid var(--border-color-primary, #e0e0e0);\n    flex-wrap: wrap-reverse;\n}\n\n.sam-prompter-container .toolbar-left,\n.sam-prompter-container .toolbar-right {\n    display: flex;\n    align-items: center;\n    gap: 4px;\n    flex-wrap: wrap;\n}\n\n.sam-prompter-container .object-tabs {\n    display: flex;\n    align-items: center;\n    gap: 2px;\n}\n\n.sam-prompter-container .object-tab {\n    all: unset;\n    display: inline-flex;\n    align-items: center;\n    gap: 4px;\n    height: 26px;\n    padding: 0 8px;\n    border-radius: 4px;\n    cursor: pointer;\n    font-size: 12px;\n    color: var(--body-text-color, #333333);\n    background: transparent;\n    border: 1px solid transparent;\n    transition: background 0.15s, border-color 0.15s;\n}\n\n.sam-prompter-container .object-tab:hover {\n    background: var(--background-fill-primary, #ffffff);\n}\n\n.sam-prompter-container .object-tab.active {\n    background: var(--background-fill-primary, #ffffff);\n    border-color: var(--border-color-primary, #e0e0e0);\n    font-weight: 600;\n    box-shadow: 0 0 0 2px var(--color-accent, #2196F3);\n}\n\n.sam-prompter-container .object-tab .color-dot {\n    width: 10px;\n    height: 10px;\n    border-radius: 50%;\n    flex-shrink: 0;\n}\n\n.sam-prompter-container .object-tab.hidden-object {\n    opacity: 0.5;\n}\n\n.sam-prompter-container .object-tab .visibility-toggle {\n    all: unset;\n    display: inline-flex;\n    align-items: center;\n    justify-content: center;\n    width: 16px;\n    height: 16px;\n    border-radius: 50%;\n    cursor: pointer;\n    color: var(--body-text-color-subdued, #888888);\n}\n\n.sam-prompter-container .object-tab .visibility-toggle:hover {\n    color: var(--body-text-color, #333333);\n}\n\n.sam-prompter-container .object-tab .visibility-toggle svg {\n    display: block;\n}\n\n.sam-prompter-container .object-tab .delete-tab {\n    all: unset;\n    display: inline-flex;\n    align-items: center;\n    justify-content: center;\n    width: 16px;\n    height: 16px;\n    border-radius: 50%;\n    font-size: 11px;\n    line-height: 1;\n    cursor: pointer;\n    color: var(--body-text-color-subdued, #888888);\n    opacity: 0;\n    transition: opacity 0.15s;\n}\n\n.sam-prompter-container .object-tab:hover .delete-tab {\n    opacity: 1;\n}\n\n.sam-prompter-container .object-tab .delete-tab:hover {\n    background: rgba(255, 0, 0, 0.1);\n    color: #ff4444;\n}\n\n/* Buttons */\n.sam-prompter-container .sp-btn {\n    all: unset;\n    display: inline-flex;\n    align-items: center;\n    justify-content: center;\n    height: 26px;\n    padding: 0 8px;\n    border-radius: 4px;\n    cursor: pointer;\n    font-size: 12px;\n    color: var(--body-text-color, #333333);\n    background: var(--background-fill-primary, #ffffff);\n    border: 1px solid var(--border-color-primary, #e0e0e0);\n    transition: background 0.15s, border-color 0.15s;\n}\n\n.sam-prompter-container .sp-btn:hover {\n    background: var(--background-fill-secondary, #f0f0f0);\n    border-color: var(--color-accent, #2196F3);\n}\n\n.sam-prompter-container .sp-btn.active {\n    background: var(--color-accent, #2196F3);\n    color: white;\n    border-color: var(--color-accent, #2196F3);\n}\n\n.sam-prompter-container .sp-btn:disabled {\n    opacity: 0.4;\n    cursor: default;\n    pointer-events: none;\n}\n\n.sam-prompter-container .help-btn {\n    width: 26px;\n    padding: 0;\n    font-weight: bold;\n}\n\n.sam-prompter-container .clear-image-btn {\n    width: 26px;\n    padding: 0;\n    font-size: 16px;\n    line-height: 1;\n}\n\n/* Settings bar */\n.sam-prompter-container .settings-bar {\n    display: flex;\n    align-items: center;\n    padding: 6px 8px;\n    gap: 6px;\n    background: var(--background-fill-secondary, #f7f7f7);\n    border-bottom: 1px solid var(--border-color-primary, #e0e0e0);\n    flex-wrap: wrap;\n}\n\n.sam-prompter-container .settings-bar.hidden {\n    display: none;\n}\n\n.sam-prompter-container .settings-group {\n    display: flex;\n    align-items: center;\n    gap: 6px;\n    margin-right: 16px;\n}\n\n.sam-prompter-container .settings-label {\n    font-size: 11px;\n    white-space: nowrap;\n    color: var(--body-text-color-subdued, #888888);\n}\n\n.sam-prompter-container .color-swatches {\n    display: flex;\n    gap: 3px;\n}\n\n.sam-prompter-container .color-swatch {\n    all: unset;\n    width: 18px;\n    height: 18px;\n    border-radius: 50%;\n    cursor: pointer;\n    border: 2px solid transparent;\n    transition: border-color 0.15s;\n}\n\n.sam-prompter-container .color-swatch:hover {\n    border-color: var(--color-accent, #2196F3);\n}\n\n.sam-prompter-container .color-swatch.active {\n    box-shadow: inset 0 0 0 2px #ffffff, inset 0 0 0 4px rgba(0, 0, 0, 0.35);\n}\n\n.sam-prompter-container .sp-slider {\n    -webkit-appearance: none;\n    appearance: none;\n    width: 100px;\n    height: 4px;\n    margin: 0;\n    padding: 0;\n    background: var(--border-color-primary, #d0d0d0);\n    border: none;\n    border-radius: 2px;\n}\n\n.sam-prompter-container .sp-slider::-webkit-slider-thumb {\n    -webkit-appearance: none;\n    appearance: none;\n    width: 14px;\n    height: 14px;\n    margin-top: -5px;\n    border: none;\n    border-radius: 50%;\n    background: var(--color-accent, #2196F3);\n    cursor: pointer;\n}\n\n.sam-prompter-container .sp-slider::-webkit-slider-runnable-track {\n    height: 4px;\n    border-radius: 2px;\n}\n\n.sam-prompter-container .sp-slider::-moz-range-thumb {\n    width: 14px;\n    height: 14px;\n    border: none;\n    border-radius: 50%;\n    background: var(--color-accent, #2196F3);\n    cursor: pointer;\n}\n\n.sam-prompter-container .sp-slider::-moz-range-track {\n    height: 4px;\n    border-radius: 2px;\n    background: var(--border-color-primary, #d0d0d0);\n}\n\n.sam-prompter-container .slider-value {\n    font-size: 11px;\n    font-family: monospace;\n    min-width: 28px;\n}\n\n.sam-prompter-container .move-btn {\n    width: 26px;\n    padding: 0;\n}\n\n.sam-prompter-container .move-btn svg {\n    display: block;\n}\n\n.sam-prompter-container .maximize-btn {\n    width: 26px;\n    padding: 0;\n}\n\n.sam-prompter-container .settings-btn {\n    width: 26px;\n    padding: 0;\n    font-weight: bold;\n}\n\n/* Canvas */\n.sam-prompter-container .canvas-wrapper {\n    position: relative;\n    width: 100%;\n    min-height: 300px;\n    background: var(--background-fill-secondary, #f7f7f7);\n    display: flex;\n    align-items: center;\n    justify-content: center;\n    overflow: hidden;\n}\n\n.sam-prompter-container .canvas-wrapper canvas {\n    display: block;\n    cursor: crosshair;\n    max-width: 100%;\n}\n\n/* Coord display */\n.sam-prompter-container .coord-display {\n    position: absolute;\n    bottom: 4px;\n    right: 8px;\n    font-size: 11px;\n    color: var(--body-text-color-subdued, #888888);\n    pointer-events: none;\n    font-family: monospace;\n}\n\n/* Help overlay */\n.sam-prompter-container .help-overlay {\n    position: absolute;\n    top: 0;\n    left: 0;\n    right: 0;\n    bottom: 0;\n    background: rgba(0, 0, 0, 0.7);\n    display: flex;\n    align-items: center;\n    justify-content: center;\n    z-index: 10;\n}\n\n.sam-prompter-container .help-overlay.hidden {\n    display: none;\n}\n\n.sam-prompter-container .help-content {\n    background: var(--background-fill-primary, #ffffff);\n    border-radius: 8px;\n    padding: 20px 24px;\n    max-width: 420px;\n    width: 90%;\n    max-height: 80%;\n    overflow-y: auto;\n}\n\n.sam-prompter-container .help-content h3 {\n    margin: 0 0 12px 0;\n    font-size: 15px;\n}\n\n.sam-prompter-container .help-content table {\n    width: 100%;\n    border-collapse: collapse;\n}\n\n.sam-prompter-container .help-content td {\n    padding: 3px 8px;\n    font-size: 12px;\n}\n\n.sam-prompter-container .help-content td:first-child {\n    white-space: nowrap;\n    text-align: right;\n    width: 40%;\n}\n\n.sam-prompter-container .help-content kbd {\n    display: inline-block;\n    padding: 1px 5px;\n    border: 1px solid var(--border-color-primary, #ccc);\n    border-radius: 3px;\n    background: var(--background-fill-secondary, #f5f5f5);\n    font-family: monospace;\n    font-size: 11px;\n}\n\n.sam-prompter-container .help-close-btn {\n    margin-top: 12px;\n    width: 100%;\n}\n\n/* Processing lock (class on element wrapper, outside morph scope) */\n&.sp-processing .canvas-wrapper {\n    cursor: wait;\n}\n\n&.sp-processing canvas {\n    pointer-events: none;\n}\n\n/* Loading */\n.sam-prompter-container .loading-indicator {\n    position: absolute;\n    top: 0;\n    left: 0;\n    right: 0;\n    bottom: 0;\n    background: color-mix(in srgb, var(--background-fill-primary, #ffffff) 70%, transparent);\n    display: flex;\n    align-items: center;\n    justify-content: center;\n    z-index: 5;\n}\n\n.sam-prompter-container .loading-indicator.hidden {\n    display: none;\n}\n\n@keyframes sam-prompter-spin {\n    to { transform: rotate(360deg); }\n}\n\n.sam-prompter-container .spinner {\n    width: 32px;\n    height: 32px;\n    border: 3px solid var(--border-color-primary, #e0e0e0);\n    border-top-color: var(--color-accent, #2196F3);\n    border-radius: 50%;\n    animation: sam-prompter-spin 0.8s linear infinite;\n}\n\n/* Drop zone */\n.sam-prompter-container .drop-zone {\n    position: absolute;\n    top: 0;\n    left: 0;\n    right: 0;\n    bottom: 0;\n    display: flex;\n    align-items: center;\n    justify-content: center;\n    color: var(--body-text-color-subdued, #888888);\n    font-size: 14px;\n    cursor: pointer;\n    border: 2px dashed transparent;\n    transition: border-color 0.2s, background 0.2s;\n}\n\n.sam-prompter-container .drop-zone.hidden {\n    display: none;\n}\n\n.sam-prompter-container .drop-zone.drag-over {\n    border-color: var(--color-accent, #2196F3);\n    background: rgba(33, 150, 243, 0.05);\n}\n\n.sam-prompter-container .drop-zone .file-input {\n    position: absolute;\n    top: 0;\n    left: 0;\n    width: 100%;\n    height: 100%;\n    opacity: 0;\n    cursor: pointer;\n}\n",
  "js_on_load": "(function () {\n    \"use strict\";\n\n    var container = element.querySelector(\".sam-prompter-container\");\n    var dataScript = element.querySelector(\"script.prompt-data\");\n    var canvasWrapper = container.querySelector(\".canvas-wrapper\");\n    var canvas = canvasWrapper.querySelector(\"canvas\");\n    var ctx = canvas.getContext(\"2d\");\n    var coordDisplay = container.querySelector(\".coord-display\");\n    var objectTabsEl = container.querySelector(\".object-tabs\");\n    var addObjectBtn = container.querySelector(\".add-object-btn\");\n    var undoBtn = container.querySelector(\".undo-btn\");\n    var clearBtn = container.querySelector(\".clear-btn\");\n    var clearAllBtn = container.querySelector(\".clear-all-btn\");\n    var maskToggleBtn = container.querySelector(\".mask-toggle-btn\");\n    var helpBtn = container.querySelector(\".help-btn\");\n    var helpOverlay = container.querySelector(\".help-overlay\");\n    var helpCloseBtn = container.querySelector(\".help-close-btn\");\n    var dropZone = container.querySelector(\".drop-zone\");\n    var fileInput = container.querySelector(\".file-input\");\n    var clearImageBtn = container.querySelector(\".clear-image-btn\");\n    var settingsBar = container.querySelector(\".settings-bar\");\n    var settingsBtn = container.querySelector(\".settings-btn\");\n    var objColorSwatches = container.querySelector(\".obj-color-swatches\");\n    var pointSizeSlider = container.querySelector(\".point-size-slider\");\n    var pointSizeValue = container.querySelector(\".point-size-value\");\n    var maskOpacitySlider = container.querySelector(\".mask-opacity-slider\");\n    var maskOpacityValue = container.querySelector(\".mask-opacity-value\");\n    var boxLineWidthSlider = container.querySelector(\".box-line-width-slider\");\n    var boxLineWidthValue = container.querySelector(\".box-line-width-value\");\n    var imageToggleBtn = container.querySelector(\".image-toggle-btn\");\n    var moveBtn = container.querySelector(\".move-btn\");\n    var maximizeBtn = container.querySelector(\".maximize-btn\");\n    var cutoutBtn = container.querySelector(\".cutout-btn\");\n\n    var isMac = /Mac|iPhone|iPad/i.test(navigator.userAgent);\n    var ALT_KEY_LABEL = isMac ? \"\u2325 Option\" : \"Alt\";\n\n    // Patch help overlay to show platform-appropriate modifier key\n    helpOverlay.querySelectorAll(\"kbd\").forEach(function (kbd) {\n        if (kbd.textContent.indexOf(\"Alt\") !== -1) {\n            kbd.textContent = kbd.textContent.replace(\"Alt\", ALT_KEY_LABEL);\n        }\n    });\n\n    var DRAG_THRESHOLD = 5;\n    var MIN_ZOOM = 1;\n    var MAX_ZOOM = 20;\n    var ZOOM_SENSITIVITY = 0.001;\n    var VIEW_COLORS = [\n        \"#00CC00\", \"#0066FF\", \"#FF0000\", \"#FFCC00\",\n        \"#FF00FF\", \"#00CCCC\", \"#FF6600\", \"#9933FF\",\n        \"#FFFFFF\", \"#000000\", \"#FF69B4\", \"#00FF80\"\n    ];\n    var maxObjects = props.max_objects;\n    var pointRadius = props.point_radius;\n    var maskAlpha = props.mask_alpha;\n    var boxLineWidth = 2;\n\n    var _renderFrameId = null;\n    function requestRender() {\n        if (_renderFrameId) return;\n        _renderFrameId = requestAnimationFrame(function () {\n            _renderFrameId = null;\n            renderAll();\n        });\n    }\n\n    // Deferred processing-flag reset: waits until the next animation\n    // frame so that Gradio's Svelte re-evaluation, mask decoding, and\n    // canvas rendering are all complete before accepting new clicks.\n    var _processingResetFrameId = null;\n    function scheduleProcessingReset() {\n        if (_processingResetFrameId) cancelAnimationFrame(_processingResetFrameId);\n        _processingResetFrameId = requestAnimationFrame(function () {\n            _processingResetFrameId = null;\n            if (state.isProcessing) {\n                state.isProcessing = false;\n                updateCanvasCursor();\n            }\n        });\n    }\n\n    // Initialize sliders\n    pointSizeSlider.value = pointRadius;\n    pointSizeValue.textContent = pointRadius;\n    maskOpacitySlider.value = Math.round(maskAlpha * 100);\n    maskOpacityValue.textContent = Math.round(maskAlpha * 100) + \"%\";\n    boxLineWidthSlider.value = boxLineWidth;\n    boxLineWidthValue.textContent = boxLineWidth + \"px\";\n\n    var state = {\n        image: null,\n        imageUrl: null,\n        naturalWidth: 0,\n        naturalHeight: 0,\n        objects: [createEmptyObject(0)],\n        activeObjectIndex: 0,\n        masks: [],\n        maskCanvases: [],\n        showMasks: true,\n        isDrawingBox: false,\n        boxStartX: 0,\n        boxStartY: 0,\n        boxCurrentX: 0,\n        boxCurrentY: 0,\n        mouseDownX: 0,\n        mouseDownY: 0,\n        mouseDownButton: -1,\n        didDrag: false,\n        isPanning: false,\n        panStartX: 0,\n        panStartY: 0,\n        panStartPanX: 0,\n        panStartPanY: 0,\n        zoom: 1,\n        panX: 0,\n        panY: 0,\n        moveMode: false,\n        spaceHeld: false,\n        showImage: true,\n        settingsVisible: true,\n        rawMasks: [],\n        // Upload state\n        objectUrl: null,\n        filePath: null,\n        pendingEmit: false,\n        imageSource: null,  // \"upload\" or \"python\"\n        altHoverPointIndex: -1,\n        altHoverBoxIndex: -1,\n        maximized: false,\n        cutoutMode: false,\n        isProcessing: false\n    };\n\n    container.__samPrompterState = state;\n\n    // Pre-computed 16x16 checkerboard tile (8px squares, white + light gray)\n    var _checkerTile = (function () {\n        var tile = document.createElement(\"canvas\");\n        tile.width = 16;\n        tile.height = 16;\n        var tCtx = tile.getContext(\"2d\");\n        tCtx.fillStyle = \"#ffffff\";\n        tCtx.fillRect(0, 0, 16, 16);\n        tCtx.fillStyle = \"#cccccc\";\n        tCtx.fillRect(8, 0, 8, 8);\n        tCtx.fillRect(0, 8, 8, 8);\n        return tile;\n    })();\n\n    // Lazily-allocated offscreen canvas for cutout compositing\n    var _cutoutCanvas = null;\n    var _cutoutCtx = null;\n    function getCutoutCanvas(w, h) {\n        if (!_cutoutCanvas || _cutoutCanvas.width !== w || _cutoutCanvas.height !== h) {\n            _cutoutCanvas = document.createElement(\"canvas\");\n            _cutoutCanvas.width = w;\n            _cutoutCanvas.height = h;\n            _cutoutCtx = _cutoutCanvas.getContext(\"2d\");\n        }\n        return { canvas: _cutoutCanvas, ctx: _cutoutCtx };\n    }\n\n    function createEmptyObject(index) {\n        return {\n            points: [],\n            labels: [],\n            boxes: [],\n            color: VIEW_COLORS[index % VIEW_COLORS.length],\n            history: [],\n            visible: true\n        };\n    }\n\n    // --- Color swatches ---\n\n    function renderColorSwatches() {\n        // Object color swatches\n        var activeColor = state.objects[state.activeObjectIndex].color;\n        objColorSwatches.innerHTML = \"\";\n        for (var i = 0; i < VIEW_COLORS.length; i++) {\n            (function (color) {\n                var btn = document.createElement(\"button\");\n                btn.className = \"color-swatch\" + (color === activeColor ? \" active\" : \"\");\n                btn.style.background = color;\n                btn.style.borderColor = color === activeColor ? color : \"transparent\";\n                btn.title = color;\n                btn.addEventListener(\"click\", function () {\n                    state.objects[state.activeObjectIndex].color = color;\n                    redecodeMask(state.activeObjectIndex);\n                    renderToolbar();\n                    requestRender();\n                });\n                objColorSwatches.appendChild(btn);\n            })(VIEW_COLORS[i]);\n        }\n\n    }\n\n    function redecodeMask(index) {\n        if (index < state.rawMasks.length && state.rawMasks[index]) {\n            var raw = state.rawMasks[index];\n            var color = (index < state.objects.length) ? state.objects[index].color : raw.color;\n            state.maskCanvases[index] = decodeMask(raw.rle, color, 1.0);\n        }\n    }\n\n    // --- Coordinate transforms ---\n\n    function clientToNatural(clientX, clientY) {\n        var rect = canvas.getBoundingClientRect();\n        var displayX = clientX - rect.left;\n        var displayY = clientY - rect.top;\n        var scaleDisplay = canvas.width / rect.width;\n        var canvasX = displayX * scaleDisplay;\n        var canvasY = displayY * scaleDisplay;\n        var natX = (canvasX - state.panX) / state.zoom;\n        var natY = (canvasY - state.panY) / state.zoom;\n        return { x: natX, y: natY };\n    }\n\n    function naturalToCanvas(natX, natY) {\n        return {\n            x: natX * state.zoom + state.panX,\n            y: natY * state.zoom + state.panY\n        };\n    }\n\n    function isInImageBounds(natX, natY) {\n        return natX >= 0 && natX <= state.naturalWidth && natY >= 0 && natY <= state.naturalHeight;\n    }\n\n    // Ratio of canvas internal pixels to CSS display pixels.\n    // Multiplying a screen-pixel size by this factor gives the\n    // equivalent size in canvas (= natural image) coordinates.\n    function getDisplayScale() {\n        var rect = canvas.getBoundingClientRect();\n        if (!rect.width) return 1;\n        return canvas.width / rect.width;\n    }\n\n    // --- Zoom/Pan helpers ---\n\n    function clampPan() {\n        if (state.zoom <= 1) {\n            state.panX = 0;\n            state.panY = 0;\n            return;\n        }\n        var maxPanX = 0;\n        var minPanX = canvas.width - canvas.width * state.zoom;\n        var maxPanY = 0;\n        var minPanY = canvas.height - canvas.height * state.zoom;\n        if (state.panX > maxPanX) state.panX = maxPanX;\n        if (state.panX < minPanX) state.panX = minPanX;\n        if (state.panY > maxPanY) state.panY = maxPanY;\n        if (state.panY < minPanY) state.panY = minPanY;\n    }\n\n    function zoomToCenter(newZoom) {\n        newZoom = Math.max(MIN_ZOOM, Math.min(MAX_ZOOM, newZoom));\n        var cx = canvas.width / 2;\n        var cy = canvas.height / 2;\n        state.panX = cx - (cx - state.panX) * (newZoom / state.zoom);\n        state.panY = cy - (cy - state.panY) * (newZoom / state.zoom);\n        state.zoom = newZoom;\n        clampPan();\n        requestRender();\n    }\n\n    function resetZoom() {\n        state.zoom = 1;\n        state.panX = 0;\n        state.panY = 0;\n        requestRender();\n    }\n\n    // Pin opacity on ancestor elements so Gradio's \"pending\" class\n    // (which sets opacity < 1) cannot create a stacking context that\n    // traps the fullscreen overlay.\n    var _pinnedAncestors = [];\n    function pinAncestorOpacity() {\n        // Remove previous pins\n        for (var i = 0; i < _pinnedAncestors.length; i++) {\n            _pinnedAncestors[i].style.removeProperty(\"opacity\");\n        }\n        _pinnedAncestors = [];\n        if (!state.maximized) return;\n        var node = element.parentElement;\n        while (node && node !== document.body && node !== document.documentElement) {\n            node.style.setProperty(\"opacity\", \"1\", \"important\");\n            _pinnedAncestors.push(node);\n            node = node.parentElement;\n        }\n    }\n\n    function toggleMaximize() {\n        state.maximized = !state.maximized;\n        element.classList.toggle(\"sp-maximized\", state.maximized);\n        document.body.style.overflow = state.maximized ? \"hidden\" : \"\";\n        pinAncestorOpacity();\n        if (state.image) {\n            requestAnimationFrame(function () {\n                resizeCanvas();\n                resetZoom();\n            });\n        }\n    }\n\n    function isMoveModeActive() {\n        return state.moveMode || state.spaceHeld;\n    }\n\n    function updateCanvasCursor() {\n        element.classList.toggle(\"sp-processing\", state.isProcessing);\n        if (state.isProcessing) return;\n        if (isMoveModeActive()) {\n            canvas.style.cursor = state.isPanning ? \"grabbing\" : (state.zoom > 1 ? \"grab\" : \"default\");\n        } else {\n            canvas.style.cursor = \"crosshair\";\n        }\n    }\n\n    // --- RLE mask decode ---\n\n    function decodeMask(rle, color, alpha) {\n        var h = rle.size[0], w = rle.size[1];\n        var offscreen = document.createElement(\"canvas\");\n        offscreen.width = w;\n        offscreen.height = h;\n        var offCtx = offscreen.getContext(\"2d\");\n        var imgData = offCtx.createImageData(w, h);\n        var d = imgData.data;\n        var r, g, b;\n        if (Array.isArray(color)) {\n            r = color[0]; g = color[1]; b = color[2];\n        } else {\n            r = parseInt(color.slice(1, 3), 16);\n            g = parseInt(color.slice(3, 5), 16);\n            b = parseInt(color.slice(5, 7), 16);\n        }\n        var a = Math.round((alpha !== undefined ? alpha : maskAlpha) * 255);\n        var pos = 0;\n        for (var i = 0; i < rle.counts.length; i++) {\n            var c = rle.counts[i];\n            if (i % 2 === 1) {\n                for (var j = pos; j < pos + c; j++) {\n                    var row = j % h;\n                    var col = (j / h) | 0;\n                    var idx = (row * w + col) * 4;\n                    d[idx] = r;\n                    d[idx + 1] = g;\n                    d[idx + 2] = b;\n                    d[idx + 3] = a;\n                }\n            }\n            pos += c;\n        }\n        offCtx.putImageData(imgData, 0, 0);\n        return offscreen;\n    }\n\n    // --- Canvas sizing ---\n\n    function resizeCanvas() {\n        if (!state.image) return;\n        var wrapperWidth = canvasWrapper.clientWidth;\n        var aspect = state.naturalWidth / state.naturalHeight;\n        var displayWidth = wrapperWidth;\n        var displayHeight = displayWidth / aspect;\n\n        // In maximized mode the wrapper has a fixed height (flex: 1).\n        // Fit the canvas within both dimensions to prevent overflow.\n        if (state.maximized) {\n            var wrapperHeight = canvasWrapper.clientHeight;\n            if (wrapperHeight > 0 && displayHeight > wrapperHeight) {\n                displayHeight = wrapperHeight;\n                displayWidth = displayHeight * aspect;\n            }\n        }\n\n        // Only update internal dimensions when they actually changed;\n        // setting canvas.width/height (even to the same value) clears\n        // the pixel buffer which causes a visible flicker.\n        if (canvas.width !== state.naturalWidth || canvas.height !== state.naturalHeight) {\n            canvas.width = state.naturalWidth;\n            canvas.height = state.naturalHeight;\n        }\n        canvas.style.width = displayWidth + \"px\";\n        canvas.style.height = displayHeight + \"px\";\n        canvasWrapper.style.minHeight = \"\";\n    }\n\n    // --- Visibility sync (survives Gradio template re-rendering) ---\n\n    function syncVisibility() {\n        if (state.image) {\n            dropZone.classList.add(\"hidden\");\n        } else {\n            dropZone.classList.remove(\"hidden\");\n        }\n        // Restore settings bar visibility from state\n        if (state.settingsVisible) {\n            settingsBar.classList.remove(\"hidden\");\n            settingsBtn.classList.add(\"active\");\n        } else {\n            settingsBar.classList.add(\"hidden\");\n            settingsBtn.classList.remove(\"active\");\n        }\n        // Restore maximized state\n        var wasMaximized = element.classList.contains(\"sp-maximized\");\n        element.classList.toggle(\"sp-maximized\", state.maximized);\n        document.body.style.overflow = state.maximized ? \"hidden\" : \"\";\n        pinAncestorOpacity();\n        // After restoring the class the wrapper dimensions change;\n        // schedule a resize so the canvas fits the new layout.\n        if (state.maximized && !wasMaximized && state.image) {\n            requestAnimationFrame(function () {\n                resizeCanvas();\n                requestRender();\n            });\n        }\n    }\n\n    // --- Rendering ---\n\n    function renderAll() {\n        syncVisibility();\n        if (!state.image) return;\n\n        var ds = getDisplayScale();\n\n        // Clear in screen space\n        ctx.setTransform(1, 0, 0, 1, 0, 0);\n        ctx.clearRect(0, 0, canvas.width, canvas.height);\n\n        // Dark background visible when zoomed/panned\n        if (state.zoom > 1) {\n            ctx.fillStyle = \"#1a1a1a\";\n            ctx.fillRect(0, 0, canvas.width, canvas.height);\n        }\n\n        // Apply zoom+pan transform\n        ctx.save();\n        ctx.setTransform(state.zoom, 0, 0, state.zoom, state.panX, state.panY);\n\n        if (!state.cutoutMode) {\n            // 1. Image (conditionally)\n            if (state.showImage) {\n                ctx.drawImage(state.image, 0, 0, state.naturalWidth, state.naturalHeight);\n            } else {\n                ctx.fillStyle = \"#222222\";\n                ctx.fillRect(0, 0, state.naturalWidth, state.naturalHeight);\n            }\n\n            // 2. Masks (with dynamic opacity via globalAlpha)\n            if (state.showMasks) {\n                ctx.globalAlpha = maskAlpha;\n                for (var m = 0; m < state.maskCanvases.length; m++) {\n                    if (state.maskCanvases[m] && m < state.objects.length && state.objects[m].visible) {\n                        ctx.drawImage(state.maskCanvases[m], 0, 0, state.naturalWidth, state.naturalHeight);\n                    }\n                }\n                ctx.globalAlpha = 1.0;\n            }\n        } else {\n            // Cutout mode: checkerboard + foreground pixels only where masks exist\n            var checkerPattern = ctx.createPattern(_checkerTile, \"repeat\");\n            ctx.fillStyle = checkerPattern;\n            ctx.fillRect(0, 0, state.naturalWidth, state.naturalHeight);\n\n            // Composite visible masks then clip the original image\n            var co = getCutoutCanvas(state.naturalWidth, state.naturalHeight);\n            co.ctx.clearRect(0, 0, state.naturalWidth, state.naturalHeight);\n\n            // Union all visible mask canvases (source-over)\n            co.ctx.globalCompositeOperation = \"source-over\";\n            for (var cm = 0; cm < state.maskCanvases.length; cm++) {\n                if (state.maskCanvases[cm] && cm < state.objects.length && state.objects[cm].visible) {\n                    co.ctx.drawImage(state.maskCanvases[cm], 0, 0, state.naturalWidth, state.naturalHeight);\n                }\n            }\n\n            // Keep image pixels only where mask alpha > 0\n            co.ctx.globalCompositeOperation = \"source-in\";\n            co.ctx.drawImage(state.image, 0, 0, state.naturalWidth, state.naturalHeight);\n            co.ctx.globalCompositeOperation = \"source-over\";\n\n            ctx.drawImage(co.canvas, 0, 0, state.naturalWidth, state.naturalHeight);\n        }\n\n        // 3. Prompts\n        for (var oi = 0; oi < state.objects.length; oi++) {\n            if (!state.objects[oi].visible) continue;\n            drawObjectPrompts(state.objects[oi], oi === state.activeObjectIndex, ds);\n        }\n\n        // 4. Alt+hover delete indicator (point)\n        if (state.altHoverPointIndex >= 0) {\n            var aObj = state.objects[state.activeObjectIndex];\n            if (aObj && state.altHoverPointIndex < aObj.points.length) {\n                var apt = aObj.points[state.altHoverPointIndex];\n                var hoverRadius = (pointRadius + 4) * ds / state.zoom;\n                ctx.beginPath();\n                ctx.arc(apt[0], apt[1], hoverRadius, 0, Math.PI * 2);\n                ctx.strokeStyle = \"#FF0000\";\n                ctx.lineWidth = 2 * ds / state.zoom;\n                ctx.setLineDash([4 * ds / state.zoom, 3 * ds / state.zoom]);\n                ctx.stroke();\n                ctx.setLineDash([]);\n            }\n        }\n\n        // 5. Alt+hover delete indicator (box)\n        if (state.altHoverBoxIndex >= 0) {\n            var bObj = state.objects[state.activeObjectIndex];\n            if (bObj && state.altHoverBoxIndex < bObj.boxes.length) {\n                var hBox = bObj.boxes[state.altHoverBoxIndex];\n                ctx.strokeStyle = \"#FF0000\";\n                ctx.lineWidth = 2 * ds / state.zoom;\n                ctx.setLineDash([4 * ds / state.zoom, 3 * ds / state.zoom]);\n                ctx.strokeRect(hBox[0], hBox[1], hBox[2] - hBox[0], hBox[3] - hBox[1]);\n                ctx.setLineDash([]);\n            }\n        }\n\n        ctx.restore();\n\n        // 6. Rubber-band box (in canvas pixel space, not zoomed)\n        if (state.isDrawingBox) {\n            drawRubberBand(ds);\n        }\n    }\n\n    function contrastStroke(hexColor) {\n        var r = parseInt(hexColor.slice(1, 3), 16);\n        var g = parseInt(hexColor.slice(3, 5), 16);\n        var b = parseInt(hexColor.slice(5, 7), 16);\n        // Perceived luminance\n        var lum = (0.299 * r + 0.587 * g + 0.114 * b) / 255;\n        return lum > 0.7 ? \"#000000\" : \"#ffffff\";\n    }\n\n    function drawObjectPrompts(obj, isActive, ds) {\n        var color = obj.color;\n        var stroke = contrastStroke(color);\n        var baseRadius = pointRadius * ds / state.zoom;\n\n        // Dim inactive objects so the active one stands out\n        if (!isActive) {\n            ctx.globalAlpha = 0.35;\n        }\n\n        // Draw boxes\n        for (var b = 0; b < obj.boxes.length; b++) {\n            var box = obj.boxes[b];\n            ctx.strokeStyle = color;\n            ctx.lineWidth = boxLineWidth * ds / state.zoom;\n            ctx.setLineDash([6 * ds / state.zoom, 4 * ds / state.zoom]);\n            ctx.strokeRect(box[0], box[1], box[2] - box[0], box[3] - box[1]);\n            ctx.setLineDash([]);\n        }\n\n        // Draw points\n        for (var p = 0; p < obj.points.length; p++) {\n            var pt = obj.points[p];\n            var label = obj.labels[p];\n            var px = pt[0];\n            var py = pt[1];\n\n            if (label === 1) {\n                // Foreground: colored circle with contrast outline\n                ctx.beginPath();\n                ctx.arc(px, py, baseRadius, 0, Math.PI * 2);\n                ctx.fillStyle = color;\n                ctx.fill();\n                ctx.strokeStyle = stroke;\n                ctx.lineWidth = 1.5 * ds / state.zoom;\n                ctx.stroke();\n            } else {\n                // Background: object-colored circle with X mark\n                ctx.beginPath();\n                ctx.arc(px, py, baseRadius, 0, Math.PI * 2);\n                ctx.fillStyle = color;\n                ctx.fill();\n                ctx.strokeStyle = stroke;\n                ctx.lineWidth = 1.5 * ds / state.zoom;\n                ctx.stroke();\n\n                // X mark\n                var xSize = baseRadius * 0.8;\n                ctx.beginPath();\n                ctx.moveTo(px - xSize, py - xSize);\n                ctx.lineTo(px + xSize, py + xSize);\n                ctx.moveTo(px + xSize, py - xSize);\n                ctx.lineTo(px - xSize, py + xSize);\n                ctx.strokeStyle = stroke;\n                ctx.lineWidth = 2 * ds / state.zoom;\n                ctx.stroke();\n            }\n        }\n\n        // Restore full opacity after drawing inactive object\n        if (!isActive) {\n            ctx.globalAlpha = 1.0;\n        }\n    }\n\n    function drawRubberBand(ds) {\n        var p1 = naturalToCanvas(state.boxStartX, state.boxStartY);\n        var p2 = naturalToCanvas(state.boxCurrentX, state.boxCurrentY);\n        var color = state.objects[state.activeObjectIndex].color;\n        ctx.save();\n        ctx.strokeStyle = color;\n        ctx.lineWidth = boxLineWidth * ds;\n        ctx.setLineDash([6 * ds, 4 * ds]);\n        // Parse hex to rgba for fill\n        var r = parseInt(color.slice(1, 3), 16);\n        var g = parseInt(color.slice(3, 5), 16);\n        var b = parseInt(color.slice(5, 7), 16);\n        ctx.fillStyle = \"rgba(\" + r + \",\" + g + \",\" + b + \",0.1)\";\n        var x = Math.min(p1.x, p2.x);\n        var y = Math.min(p1.y, p2.y);\n        var w = Math.abs(p2.x - p1.x);\n        var h = Math.abs(p2.y - p1.y);\n        ctx.fillRect(x, y, w, h);\n        ctx.strokeRect(x, y, w, h);\n        ctx.setLineDash([]);\n        ctx.restore();\n    }\n\n    function renderToolbar() {\n        var html = \"\";\n        for (var i = 0; i < state.objects.length; i++) {\n            var obj = state.objects[i];\n            var activeClass = i === state.activeObjectIndex ? \" active\" : \"\";\n            var hiddenClass = !obj.visible ? \" hidden-object\" : \"\";\n            var promptCount = obj.points.length + obj.boxes.length;\n            var tabStyle = activeClass ? ' style=\"border-left: 3px solid ' + obj.color + ';\"' : \"\";\n            html += '<button class=\"object-tab' + activeClass + hiddenClass + '\"' + tabStyle + ' data-index=\"' + i + '\">';\n            html += '<span class=\"color-dot\" style=\"background:' + obj.color + '\"></span>';\n            html += \"Obj \" + (i + 1);\n            if (promptCount > 0) html += \" (\" + promptCount + \")\";\n            var eyeSvg = obj.visible\n                ? '<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M1 12s4-8 11-8 11 8 11 8-4 8-11 8-11-8-11-8z\"/><circle cx=\"12\" cy=\"12\" r=\"3\"/></svg>'\n                : '<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M17.94 17.94A10.07 10.07 0 0 1 12 20c-7 0-11-8-11-8a18.45 18.45 0 0 1 5.06-5.94\"/><path d=\"M9.9 4.24A9.12 9.12 0 0 1 12 4c7 0 11 8 11 8a18.5 18.5 0 0 1-2.16 3.19\"/><line x1=\"1\" y1=\"1\" x2=\"23\" y2=\"23\"/></svg>';\n            html += ' <span class=\"visibility-toggle\" data-vis=\"' + i + '\">' + eyeSvg + \"</span>\";\n            if (state.objects.length > 1) {\n                html += ' <span class=\"delete-tab\" data-delete=\"' + i + '\">&times;</span>';\n            }\n            html += \"</button>\";\n        }\n        objectTabsEl.innerHTML = html;\n\n        // Bind tab clicks\n        var tabs = objectTabsEl.querySelectorAll(\".object-tab\");\n        for (var t = 0; t < tabs.length; t++) {\n            (function (tab) {\n                tab.addEventListener(\"click\", function (e) {\n                    if (e.target.classList.contains(\"delete-tab\") || e.target.getAttribute(\"data-delete\") !== null) {\n                        return;\n                    }\n                    if (e.target.classList.contains(\"visibility-toggle\") || e.target.getAttribute(\"data-vis\") !== null) {\n                        return;\n                    }\n                    var idx = parseInt(tab.getAttribute(\"data-index\"), 10);\n                    state.activeObjectIndex = idx;\n                    renderToolbar();\n                    requestRender();\n                });\n            })(tabs[t]);\n        }\n\n        // Bind visibility toggle clicks\n        var visBtns = objectTabsEl.querySelectorAll(\".visibility-toggle\");\n        for (var vi = 0; vi < visBtns.length; vi++) {\n            (function (btn) {\n                btn.addEventListener(\"click\", function (e) {\n                    e.stopPropagation();\n                    var idx = parseInt(btn.getAttribute(\"data-vis\"), 10);\n                    state.objects[idx].visible = !state.objects[idx].visible;\n                    renderToolbar();\n                    requestRender();\n                });\n            })(visBtns[vi]);\n        }\n\n        // Bind delete clicks\n        var deleteBtns = objectTabsEl.querySelectorAll(\".delete-tab\");\n        for (var d = 0; d < deleteBtns.length; d++) {\n            (function (btn) {\n                btn.addEventListener(\"click\", function (e) {\n                    e.stopPropagation();\n                    var idx = parseInt(btn.getAttribute(\"data-delete\"), 10);\n                    deleteObject(idx);\n                });\n            })(deleteBtns[d]);\n        }\n\n        // Update add button state\n        addObjectBtn.disabled = state.objects.length >= maxObjects;\n\n        // Update undo/clear button states\n        var activeObj = state.objects[state.activeObjectIndex];\n        undoBtn.disabled = !activeObj || activeObj.history.length === 0;\n        clearBtn.disabled = !activeObj || (activeObj.points.length === 0 && activeObj.boxes.length === 0);\n\n        var hasAnyPrompts = state.objects.some(function (o) {\n            return o.points.length > 0 || o.boxes.length > 0;\n        });\n        clearAllBtn.disabled = !hasAnyPrompts;\n\n        // Mask toggle\n        if (state.showMasks) {\n            maskToggleBtn.classList.add(\"active\");\n        } else {\n            maskToggleBtn.classList.remove(\"active\");\n        }\n\n        // Move mode\n        if (isMoveModeActive()) {\n            moveBtn.classList.add(\"active\");\n        } else {\n            moveBtn.classList.remove(\"active\");\n        }\n\n        // Clear image button\n        clearImageBtn.disabled = !state.image;\n\n        // Image toggle\n        if (state.showImage) {\n            imageToggleBtn.classList.add(\"active\");\n        } else {\n            imageToggleBtn.classList.remove(\"active\");\n        }\n\n        // Cutout mode\n        if (state.cutoutMode) {\n            cutoutBtn.classList.add(\"active\");\n        } else {\n            cutoutBtn.classList.remove(\"active\");\n        }\n\n        // Restore slider value labels (Svelte template re-evaluation clears textContent)\n        pointSizeValue.textContent = pointRadius;\n        maskOpacityValue.textContent = Math.round(maskAlpha * 100) + \"%\";\n        boxLineWidthValue.textContent = boxLineWidth + \"px\";\n\n        // Color swatches\n        renderColorSwatches();\n    }\n\n    // --- Object management ---\n\n    function addObject() {\n        if (state.isProcessing) return;\n        if (state.objects.length >= maxObjects) return;\n        var newObj = createEmptyObject(state.objects.length);\n        state.objects.push(newObj);\n        state.activeObjectIndex = state.objects.length - 1;\n        renderToolbar();\n        requestRender();\n    }\n\n    function deleteObject(index) {\n        if (state.isProcessing) return;\n        if (state.objects.length <= 1) {\n            clearActiveObject();\n            return;\n        }\n        state.objects.splice(index, 1);\n        if (state.activeObjectIndex >= state.objects.length) {\n            state.activeObjectIndex = state.objects.length - 1;\n        } else if (state.activeObjectIndex > index) {\n            state.activeObjectIndex--;\n        }\n        // Reassign colors and re-decode affected masks\n        for (var i = 0; i < state.objects.length; i++) {\n            state.objects[i].color = VIEW_COLORS[i % VIEW_COLORS.length];\n            redecodeMask(i);\n        }\n        renderToolbar();\n        requestRender();\n        emitPromptData();\n    }\n\n    function clearActiveObject() {\n        if (state.isProcessing) return;\n        var obj = state.objects[state.activeObjectIndex];\n        if (obj.points.length === 0 && obj.boxes.length === 0) return;\n        obj.history.push({\n            type: \"clear\",\n            points: obj.points.slice(),\n            labels: obj.labels.slice(),\n            boxes: obj.boxes.map(function (b) { return b.slice(); })\n        });\n        obj.points = [];\n        obj.labels = [];\n        obj.boxes = [];\n        // Clear stale mask so it doesn't render with wrong color\n        if (state.activeObjectIndex < state.maskCanvases.length) {\n            state.maskCanvases[state.activeObjectIndex] = null;\n        }\n        if (state.activeObjectIndex < state.rawMasks.length) {\n            state.rawMasks[state.activeObjectIndex] = null;\n        }\n        renderToolbar();\n        requestRender();\n        emitPromptData();\n    }\n\n    function clearAll() {\n        if (state.isProcessing) return;\n        state.objects = [createEmptyObject(0)];\n        state.activeObjectIndex = 0;\n        state.rawMasks = [];\n        state.maskCanvases = [];\n        renderToolbar();\n        requestRender();\n        emitPromptData();\n    }\n\n    // --- Prompt operations ---\n\n    function addPoint(natX, natY, label) {\n        if (state.isProcessing) return;\n        var obj = state.objects[state.activeObjectIndex];\n        obj.history.push({ type: \"point\" });\n        obj.points.push([Math.round(natX), Math.round(natY)]);\n        obj.labels.push(label);\n        renderToolbar();\n        requestRender();\n        emitPromptData();\n    }\n\n    function addBox(x1, y1, x2, y2) {\n        if (state.isProcessing) return;\n        var bx1 = Math.round(Math.min(x1, x2));\n        var by1 = Math.round(Math.min(y1, y2));\n        var bx2 = Math.round(Math.max(x1, x2));\n        var by2 = Math.round(Math.max(y1, y2));\n        // Ignore tiny boxes\n        if (Math.abs(bx2 - bx1) < 3 && Math.abs(by2 - by1) < 3) return;\n        var obj = state.objects[state.activeObjectIndex];\n        obj.history.push({ type: \"box\" });\n        obj.boxes.push([bx1, by1, bx2, by2]);\n        renderToolbar();\n        requestRender();\n        emitPromptData();\n    }\n\n    function undoLastPrompt() {\n        if (state.isProcessing) return;\n        var obj = state.objects[state.activeObjectIndex];\n        if (obj.history.length === 0) return;\n        var last = obj.history.pop();\n        if (last.type === \"point\") {\n            obj.points.pop();\n            obj.labels.pop();\n        } else if (last.type === \"box\") {\n            obj.boxes.pop();\n        } else if (last.type === \"delete-point\") {\n            obj.points.splice(last.index, 0, last.point);\n            obj.labels.splice(last.index, 0, last.label);\n        } else if (last.type === \"delete-box\") {\n            obj.boxes.splice(last.index, 0, last.box);\n        } else if (last.type === \"clear\") {\n            obj.points = last.points;\n            obj.labels = last.labels;\n            obj.boxes = last.boxes;\n        }\n        renderToolbar();\n        requestRender();\n        emitPromptData();\n    }\n\n    function findNearestPoint(natX, natY) {\n        var obj = state.objects[state.activeObjectIndex];\n        var ds = getDisplayScale();\n        var hitRadius = pointRadius * 2 * ds / state.zoom;\n        var bestDist = Infinity;\n        var bestIdx = -1;\n        for (var i = 0; i < obj.points.length; i++) {\n            var dx = obj.points[i][0] - natX;\n            var dy = obj.points[i][1] - natY;\n            var dist = Math.sqrt(dx * dx + dy * dy);\n            if (dist < hitRadius && dist < bestDist) {\n                bestDist = dist;\n                bestIdx = i;\n            }\n        }\n        return bestIdx;\n    }\n\n    function deletePointAt(index) {\n        if (state.isProcessing) return;\n        var obj = state.objects[state.activeObjectIndex];\n        if (index < 0 || index >= obj.points.length) return;\n        var point = obj.points[index].slice();\n        var label = obj.labels[index];\n        obj.history.push({ type: \"delete-point\", index: index, point: point, label: label });\n        obj.points.splice(index, 1);\n        obj.labels.splice(index, 1);\n        renderToolbar();\n        requestRender();\n        emitPromptData();\n    }\n\n    function distToSegment(px, py, ax, ay, bx, by) {\n        var dx = bx - ax, dy = by - ay;\n        var lenSq = dx * dx + dy * dy;\n        if (lenSq === 0) return Math.sqrt((px - ax) * (px - ax) + (py - ay) * (py - ay));\n        var t = ((px - ax) * dx + (py - ay) * dy) / lenSq;\n        t = Math.max(0, Math.min(1, t));\n        var projX = ax + t * dx, projY = ay + t * dy;\n        return Math.sqrt((px - projX) * (px - projX) + (py - projY) * (py - projY));\n    }\n\n    function findNearestBox(natX, natY) {\n        var obj = state.objects[state.activeObjectIndex];\n        var ds = getDisplayScale();\n        var hitRadius = boxLineWidth * 3 * ds / state.zoom;\n        var bestDist = Infinity;\n        var bestIdx = -1;\n        for (var i = 0; i < obj.boxes.length; i++) {\n            var b = obj.boxes[i];\n            var x1 = b[0], y1 = b[1], x2 = b[2], y2 = b[3];\n            // Distance to each of the four edges\n            var d = Math.min(\n                distToSegment(natX, natY, x1, y1, x2, y1),  // top\n                distToSegment(natX, natY, x2, y1, x2, y2),  // right\n                distToSegment(natX, natY, x2, y2, x1, y2),  // bottom\n                distToSegment(natX, natY, x1, y2, x1, y1)   // left\n            );\n            if (d < hitRadius && d < bestDist) {\n                bestDist = d;\n                bestIdx = i;\n            }\n        }\n        return { index: bestIdx, dist: bestDist };\n    }\n\n    function deleteBoxAt(index) {\n        if (state.isProcessing) return;\n        var obj = state.objects[state.activeObjectIndex];\n        if (index < 0 || index >= obj.boxes.length) return;\n        var box = obj.boxes[index].slice();\n        obj.history.push({ type: \"delete-box\", index: index, box: box });\n        obj.boxes.splice(index, 1);\n        renderToolbar();\n        requestRender();\n        emitPromptData();\n    }\n\n    // --- JS \u2192 Python communication ---\n\n    function hasAnyPrompts() {\n        return state.objects.some(function (obj) {\n            return obj.points.length > 0 || obj.boxes.length > 0;\n        });\n    }\n\n    function emitPromptData() {\n        // Skip backend call when no object has actual prompts (points/boxes)\n        if (!hasAnyPrompts()) return;\n        // Defer if user uploaded a file but server path not yet available\n        if (state.imageSource === \"upload\" && state.image && !state.filePath) {\n            state.pendingEmit = true;\n            return;\n        }\n        var prompts = state.objects.map(function (obj) {\n            return {\n                points: obj.points.slice(),\n                labels: obj.labels.slice(),\n                boxes: obj.boxes.map(function (b) { return b.slice(); })\n            };\n        });\n        var payload = { prompts: prompts };\n        if (state.imageSource === \"upload\" && state.filePath) {\n            payload.imagePath = state.filePath;\n            payload.imageSize = { width: state.naturalWidth, height: state.naturalHeight };\n        }\n        if (state.imageSource === \"python\" && state.imageUrl) {\n            var prefix = \"/gradio_api/file=\";\n            if (state.imageUrl.startsWith(prefix)) {\n                payload.imagePath = state.imageUrl.slice(prefix.length);\n            }\n            payload.imageSize = { width: state.naturalWidth, height: state.naturalHeight };\n        }\n        props.value = JSON.stringify(payload);\n        trigger(\"input\");\n        state.isProcessing = true;\n        updateCanvasCursor();\n    }\n\n    // --- MutationObserver (Python \u2192 JS) ---\n\n    function handleDataUpdate() {\n        var raw = dataScript.textContent.trim();\n        if (!raw || raw === \"null\") {\n            // Only reset if image was from Python (not user upload)\n            if (state.imageSource !== \"upload\") {\n                state.image = null;\n                state.imageUrl = null;\n                state.rawMasks = [];\n                state.maskCanvases = [];\n            }\n            // Restore dynamically-populated toolbar elements (swatches,\n            // object tabs) that Gradio's Svelte template re-evaluation\n            // clears when it resets ${value} after the Python handler\n            // output is applied.\n            scheduleProcessingReset();\n            if (state.image) {\n                resizeCanvas();\n                renderToolbar();\n            }\n            requestRender();\n            return;\n        }\n\n        var data;\n        try {\n            data = JSON.parse(raw);\n        } catch (e) {\n            return;\n        }\n\n        // Schedule deferred processing reset only for actual Python\n        // responses (which contain \"masks\", \"image\", or \"clearPrompts\" keys).\n        // The Svelte echo of props.value (which only has \"prompts\") must\n        // NOT reset the flag, otherwise isProcessing would be cleared\n        // immediately via microtask before Python even responds.\n        if (state.isProcessing && (\"masks\" in data || \"image\" in data || \"clearPrompts\" in data)) {\n            scheduleProcessingReset();\n        }\n\n        // Update maxObjects limit if Python specified it\n        if (typeof data.maxObjects === \"number\" && data.maxObjects > 0) {\n            maxObjects = data.maxObjects;\n            // Trim objects if exceeding new limit\n            while (state.objects.length > maxObjects) {\n                state.objects.pop();\n            }\n            if (state.activeObjectIndex >= state.objects.length) {\n                state.activeObjectIndex = Math.max(0, state.objects.length - 1);\n            }\n        }\n\n        // Python requested clearing all user-drawn prompts (points & boxes)\n        if (data.clearPrompts) {\n            state.objects = [createEmptyObject(0)];\n            state.activeObjectIndex = 0;\n            // If this is a clear-only payload (no image), just re-render\n            if (!(\"image\" in data)) {\n                state.rawMasks = [];\n                state.maskCanvases = [];\n                if (state.image) {\n                    resizeCanvas();\n                }\n                renderToolbar();\n                requestRender();\n                return;\n            }\n        }\n\n        // Decode masks (store raw for re-decoding, decode at alpha=1.0 for globalAlpha control)\n        if (data.masks && data.masks.length > 0) {\n            var numMasks = data.masks.length;\n            // Ensure enough objects exist to hold all server-sent masks\n            // (e.g. initial value with multiple masks on a fresh component).\n            while (state.objects.length < numMasks) {\n                state.objects.push(createEmptyObject(state.objects.length));\n            }\n            var numObjects = state.objects.length;\n\n            // Initialize sparse arrays (one slot per object, null = no mask)\n            var newRaw = [];\n            var newCanvases = [];\n            for (var si = 0; si < numObjects; si++) {\n                newRaw.push(null);\n                newCanvases.push(null);\n            }\n\n            if (numMasks >= numObjects) {\n                // 1:1 (or more) mapping \u2014 direct index\n                for (var di = 0; di < numObjects; di++) {\n                    newRaw[di] = data.masks[di];\n                    newCanvases[di] = decodeMask(data.masks[di].rle, state.objects[di].color, 1.0);\n                }\n            } else {\n                // Fewer masks than objects \u2014 backend likely skipped empty\n                // prompts.  Map returned masks to objects that have prompts.\n                var promptedIndices = [];\n                for (var pi = 0; pi < numObjects; pi++) {\n                    var pObj = state.objects[pi];\n                    if (pObj.points.length > 0 || pObj.boxes.length > 0) {\n                        promptedIndices.push(pi);\n                    }\n                }\n\n                if (numMasks === promptedIndices.length) {\n                    // Perfect match \u2014 assign each mask to its prompted object\n                    for (var mi = 0; mi < numMasks; mi++) {\n                        var idx = promptedIndices[mi];\n                        newRaw[idx] = data.masks[mi];\n                        newCanvases[idx] = decodeMask(data.masks[mi].rle, state.objects[idx].color, 1.0);\n                    }\n                } else {\n                    // Fallback: direct index mapping (original behaviour)\n                    for (var fi = 0; fi < numMasks && fi < numObjects; fi++) {\n                        newRaw[fi] = data.masks[fi];\n                        newCanvases[fi] = decodeMask(data.masks[fi].rle, state.objects[fi].color, 1.0);\n                    }\n                }\n            }\n\n            state.rawMasks = newRaw;\n            state.maskCanvases = newCanvases;\n        } else if (\"masks\" in data) {\n            // Python explicitly returned empty masks \u2014 clear.\n            // Skip when the key is absent (JS echo in Svelte Phase 1).\n            state.rawMasks = [];\n            state.maskCanvases = [];\n        }\n\n        // If the user uploaded an image, keep displaying it (blob URL)\n        // and only update masks \u2014 do NOT reload from the Python cache URL.\n        // Re-render the toolbar because Gradio's template re-evaluation\n        // resets dynamically-populated DOM elements (swatches, object tabs).\n        if (state.imageSource === \"upload\" && state.image) {\n            resizeCanvas();\n            renderToolbar();\n            requestRender();\n            return;\n        }\n\n        // Load image if URL changed (Python-provided image)\n        if (data.image && data.image !== state.imageUrl) {\n            // Detect mask-only updates for the same underlying image: lossy\n            // re-encoding produces a different cache URL each time, so we\n            // check whether the response is really just new masks rather\n            // than a genuinely new image.\n            var isMaskUpdate = state.imageSource === \"python\" &&\n                state.image &&\n                data.masks && data.masks.length > 0 &&\n                (data.width || 0) === state.naturalWidth &&\n                (data.height || 0) === state.naturalHeight;\n\n            state.imageUrl = data.image;\n            state.imageSource = \"python\";\n            // Clean up previous blob URL if any\n            if (state.objectUrl) {\n                URL.revokeObjectURL(state.objectUrl);\n                state.objectUrl = null;\n            }\n            state.filePath = null;\n            var img = new Image();\n            img.crossOrigin = \"anonymous\";\n            img.onload = function () {\n                state.image = img;\n                state.naturalWidth = data.width || img.naturalWidth;\n                state.naturalHeight = data.height || img.naturalHeight;\n                if (!isMaskUpdate) {\n                    var initMasks = (data.masks && data.masks.length) || 0;\n                    if (initMasks > 1) {\n                        state.objects = [];\n                        for (var oi = 0; oi < initMasks; oi++) {\n                            state.objects.push(createEmptyObject(oi));\n                        }\n                    } else {\n                        state.objects = [createEmptyObject(0)];\n                    }\n                    state.activeObjectIndex = 0;\n                    state.zoom = 1;\n                    state.panX = 0;\n                    state.panY = 0;\n                }\n                resizeCanvas();\n                renderToolbar();\n                requestRender();\n            };\n            img.src = data.image;\n        } else if (data.image === state.imageUrl && state.image) {\n            // Same image, just masks updated \u2014 re-render toolbar to restore\n            // dynamically-populated elements after Gradio template re-evaluation.\n            resizeCanvas();\n            renderToolbar();\n            requestRender();\n        }\n    }\n\n    var observer = new MutationObserver(function () {\n        handleDataUpdate();\n        // Re-pin after every Gradio round-trip in case the \"pending\"\n        // class was re-applied to an ancestor during the update.\n        pinAncestorOpacity();\n        // In maximized mode, Gradio's morph may alter layout before\n        // resizeCanvas() runs above.  Schedule a deferred resize so\n        // the canvas fits the settled wrapper dimensions.\n        if (state.maximized && state.image) {\n            requestAnimationFrame(function () {\n                resizeCanvas();\n                requestRender();\n            });\n        }\n    });\n    observer.observe(dataScript, { childList: true, characterData: true, subtree: true });\n\n    // Gradio may reset DOM attributes when re-rendering the template.\n    // Re-apply drop-zone visibility if Gradio resets the class.\n    var domObserver = new MutationObserver(function () {\n        var shouldBeHidden = !!state.image;\n        var isHidden = dropZone.classList.contains(\"hidden\");\n        if (shouldBeHidden !== isHidden) {\n            syncVisibility();\n        }\n    });\n    domObserver.observe(dropZone, { attributes: true, attributeFilter: [\"class\"] });\n\n    // Similarly, restore settings-bar visibility if Gradio resets the class.\n    var settingsObserver = new MutationObserver(function () {\n        var shouldBeVisible = state.settingsVisible;\n        var isHidden = settingsBar.classList.contains(\"hidden\");\n        if (shouldBeVisible === isHidden) {\n            syncVisibility();\n        }\n    });\n    settingsObserver.observe(settingsBar, { attributes: true, attributeFilter: [\"class\"] });\n\n    // --- Mouse events ---\n\n    canvas.addEventListener(\"mousedown\", function (e) {\n        if (!state.image || state.isProcessing) return;\n\n        // Middle button \u2192 always pan\n        if (e.button === 1) {\n            e.preventDefault();\n            state.isPanning = true;\n            state.didDrag = false;\n            state.panStartX = e.clientX;\n            state.panStartY = e.clientY;\n            state.panStartPanX = state.panX;\n            state.panStartPanY = state.panY;\n            canvas.style.cursor = \"grabbing\";\n            return;\n        }\n\n        // Left button in move mode \u2192 pan\n        if (e.button === 0 && isMoveModeActive()) {\n            state.isPanning = true;\n            state.didDrag = false;\n            state.panStartX = e.clientX;\n            state.panStartY = e.clientY;\n            state.panStartPanX = state.panX;\n            state.panStartPanY = state.panY;\n            if (state.zoom > 1) {\n                canvas.style.cursor = \"grabbing\";\n            }\n            return;\n        }\n\n        // Normal mode: record mousedown for point/box\n        state.mouseDownX = e.clientX;\n        state.mouseDownY = e.clientY;\n        state.mouseDownButton = e.button;\n        state.didDrag = false;\n\n        if (e.button === 0) {\n            var nat = clientToNatural(e.clientX, e.clientY);\n            if (!isInImageBounds(nat.x, nat.y)) return;\n            state.boxStartX = nat.x;\n            state.boxStartY = nat.y;\n            state.boxCurrentX = nat.x;\n            state.boxCurrentY = nat.y;\n        }\n    });\n\n    // Window-level mousemove for panning and box drawing outside canvas\n    window.addEventListener(\"mousemove\", function (e) {\n        // Handle panning\n        if (state.isPanning) {\n            var dx = e.clientX - state.panStartX;\n            var dy = e.clientY - state.panStartY;\n\n            if (!state.didDrag && (Math.abs(dx) > DRAG_THRESHOLD || Math.abs(dy) > DRAG_THRESHOLD)) {\n                state.didDrag = true;\n            }\n\n            if (state.didDrag && state.zoom > 1) {\n                var rect = canvas.getBoundingClientRect();\n                var cssToCanvasX = canvas.width / rect.width;\n                var cssToCanvasY = canvas.height / rect.height;\n                state.panX = state.panStartPanX + dx * cssToCanvasX;\n                state.panY = state.panStartPanY + dy * cssToCanvasY;\n                clampPan();\n                requestRender();\n            }\n            return;\n        }\n\n        // Handle box drawing (works both inside and outside canvas)\n        if (state.mouseDownButton === 0 && !isMoveModeActive()) {\n            var dragDist = Math.sqrt(\n                Math.pow(e.clientX - state.mouseDownX, 2) +\n                Math.pow(e.clientY - state.mouseDownY, 2)\n            );\n            if (dragDist > DRAG_THRESHOLD) {\n                state.didDrag = true;\n                state.isDrawingBox = true;\n            }\n            if (state.isDrawingBox) {\n                var natCur = clientToNatural(e.clientX, e.clientY);\n                state.boxCurrentX = Math.max(0, Math.min(natCur.x, state.naturalWidth));\n                state.boxCurrentY = Math.max(0, Math.min(natCur.y, state.naturalHeight));\n                requestRender();\n            }\n        }\n    });\n\n    // Window-level mouseup for panning and box drawing\n    window.addEventListener(\"mouseup\", function (e) {\n        if (state.isPanning && (e.button === 0 || e.button === 1)) {\n            state.isPanning = false;\n            updateCanvasCursor();\n        }\n\n        // Finalize box drawing if mouse released outside canvas\n        if (e.button === 0 && state.isDrawingBox && state.didDrag) {\n            addBox(state.boxStartX, state.boxStartY, state.boxCurrentX, state.boxCurrentY);\n        }\n\n        // Clean up interaction state (no-op if canvas handler already reset)\n        if (e.button === state.mouseDownButton) {\n            state.isDrawingBox = false;\n            state.didDrag = false;\n            state.mouseDownButton = -1;\n        }\n    });\n\n    // Canvas-local mousemove for coord display, alt-hover, and box drawing\n    canvas.addEventListener(\"mousemove\", function (e) {\n        if (!state.image) return;\n        if (state.isPanning) return;\n\n        // Update coord display\n        var nat = clientToNatural(e.clientX, e.clientY);\n        if (isInImageBounds(nat.x, nat.y)) {\n            coordDisplay.textContent = Math.round(nat.x) + \", \" + Math.round(nat.y);\n        } else {\n            coordDisplay.textContent = \"\";\n        }\n\n        // Move mode: no alt-hover or box drawing\n        if (isMoveModeActive()) return;\n\n        // Alt+hover: highlight nearest point or box for deletion\n        if (e.altKey && !state.isDrawingBox) {\n            var hoverPtIdx = -1;\n            var hoverBoxIdx = -1;\n            if (isInImageBounds(nat.x, nat.y)) {\n                var ptIdx = findNearestPoint(nat.x, nat.y);\n                var ptDist = Infinity;\n                if (ptIdx >= 0) {\n                    var hp = state.objects[state.activeObjectIndex].points[ptIdx];\n                    ptDist = Math.sqrt((hp[0] - nat.x) * (hp[0] - nat.x) + (hp[1] - nat.y) * (hp[1] - nat.y));\n                }\n                var boxResult = findNearestBox(nat.x, nat.y);\n                if (ptIdx >= 0 && boxResult.index >= 0) {\n                    if (ptDist <= boxResult.dist) {\n                        hoverPtIdx = ptIdx;\n                    } else {\n                        hoverBoxIdx = boxResult.index;\n                    }\n                } else if (ptIdx >= 0) {\n                    hoverPtIdx = ptIdx;\n                } else if (boxResult.index >= 0) {\n                    hoverBoxIdx = boxResult.index;\n                }\n            }\n            var changed = false;\n            if (hoverPtIdx !== state.altHoverPointIndex) {\n                state.altHoverPointIndex = hoverPtIdx;\n                changed = true;\n            }\n            if (hoverBoxIdx !== state.altHoverBoxIndex) {\n                state.altHoverBoxIndex = hoverBoxIdx;\n                changed = true;\n            }\n            if (changed) requestRender();\n            canvas.style.cursor = (hoverPtIdx >= 0 || hoverBoxIdx >= 0) ? \"not-allowed\" : \"crosshair\";\n        } else if (state.altHoverPointIndex >= 0 || state.altHoverBoxIndex >= 0) {\n            state.altHoverPointIndex = -1;\n            state.altHoverBoxIndex = -1;\n            canvas.style.cursor = \"crosshair\";\n            requestRender();\n        }\n\n        // Box drawing mousemove is handled by window-level handler\n    });\n\n    canvas.addEventListener(\"mouseup\", function (e) {\n        if (!state.image) return;\n\n        // Pan ended via window handler; skip prompt actions in move mode\n        if (isMoveModeActive()) return;\n\n        // Alt+click \u2192 delete nearest point or box\n        if (e.altKey && (e.button === 0 || e.button === 2) && !state.didDrag) {\n            var natAlt = clientToNatural(e.clientX, e.clientY);\n            if (isInImageBounds(natAlt.x, natAlt.y)) {\n                var delPtIdx = findNearestPoint(natAlt.x, natAlt.y);\n                var delPtDist = Infinity;\n                if (delPtIdx >= 0) {\n                    var dp = state.objects[state.activeObjectIndex].points[delPtIdx];\n                    delPtDist = Math.sqrt((dp[0] - natAlt.x) * (dp[0] - natAlt.x) + (dp[1] - natAlt.y) * (dp[1] - natAlt.y));\n                }\n                var delBoxResult = findNearestBox(natAlt.x, natAlt.y);\n                if (delPtIdx >= 0 && delBoxResult.index >= 0) {\n                    if (delPtDist <= delBoxResult.dist) {\n                        deletePointAt(delPtIdx);\n                    } else {\n                        deleteBoxAt(delBoxResult.index);\n                    }\n                } else if (delPtIdx >= 0) {\n                    deletePointAt(delPtIdx);\n                } else if (delBoxResult.index >= 0) {\n                    deleteBoxAt(delBoxResult.index);\n                }\n                state.altHoverPointIndex = -1;\n                state.altHoverBoxIndex = -1;\n            }\n            state.isDrawingBox = false;\n            state.didDrag = false;\n            state.mouseDownButton = -1;\n            return;\n        }\n\n        if (e.button === 0) {\n            if (state.isDrawingBox && state.didDrag) {\n                // Finalize box\n                addBox(state.boxStartX, state.boxStartY, state.boxCurrentX, state.boxCurrentY);\n            } else if (!state.didDrag) {\n                // Left click \u2192 fg point\n                var nat = clientToNatural(e.clientX, e.clientY);\n                if (isInImageBounds(nat.x, nat.y)) {\n                    addPoint(nat.x, nat.y, 1);\n                }\n            }\n            state.isDrawingBox = false;\n            state.didDrag = false;\n            state.mouseDownButton = -1;\n        } else if (e.button === 2) {\n            // Right click \u2192 bg point\n            if (!state.didDrag) {\n                var natR = clientToNatural(e.clientX, e.clientY);\n                if (isInImageBounds(natR.x, natR.y)) {\n                    addPoint(natR.x, natR.y, 0);\n                }\n            }\n            state.mouseDownButton = -1;\n        }\n    });\n\n    canvas.addEventListener(\"mouseleave\", function () {\n        coordDisplay.textContent = \"\";\n        if (state.altHoverPointIndex >= 0 || state.altHoverBoxIndex >= 0) {\n            state.altHoverPointIndex = -1;\n            state.altHoverBoxIndex = -1;\n            requestRender();\n        }\n        // Don't cancel pan or box drawing \u2014 window handlers will finish them\n    });\n\n    canvas.addEventListener(\"contextmenu\", function (e) {\n        e.preventDefault();\n    });\n\n    // Double-click to reset zoom (only in move mode)\n    canvas.addEventListener(\"dblclick\", function (e) {\n        if (!state.image) return;\n        if (!isMoveModeActive()) return;\n        e.preventDefault();\n        resetZoom();\n        updateCanvasCursor();\n    });\n\n    document.addEventListener(\"keyup\", function (e) {\n        if (e.key === \" \") {\n            state.spaceHeld = false;\n            updateCanvasCursor();\n            renderToolbar();\n        }\n        if (e.key === \"Alt\" && (state.altHoverPointIndex >= 0 || state.altHoverBoxIndex >= 0)) {\n            state.altHoverPointIndex = -1;\n            state.altHoverBoxIndex = -1;\n            updateCanvasCursor();\n            requestRender();\n        }\n    });\n\n    // --- Zoom ---\n\n    canvas.addEventListener(\"wheel\", function (e) {\n        if (!state.image) return;\n        e.preventDefault();\n\n        var delta = e.deltaY;\n        if (e.deltaMode === 1) delta *= 16;\n        else if (e.deltaMode === 2) delta *= 100;\n\n        var newZoom = state.zoom * (1 - delta * ZOOM_SENSITIVITY);\n        newZoom = Math.max(MIN_ZOOM, Math.min(MAX_ZOOM, newZoom));\n\n        // Zoom toward cursor position\n        var rect = canvas.getBoundingClientRect();\n        var mx = (e.clientX - rect.left) * (canvas.width / rect.width);\n        var my = (e.clientY - rect.top) * (canvas.height / rect.height);\n\n        state.panX = mx - (mx - state.panX) * (newZoom / state.zoom);\n        state.panY = my - (my - state.panY) * (newZoom / state.zoom);\n        state.zoom = newZoom;\n        clampPan();\n        updateCanvasCursor();\n        requestRender();\n    }, { passive: false });\n\n    // --- Keyboard shortcuts ---\n\n    // Track hover state so shortcuts work without requiring element focus.\n    // Listening on document level avoids the Gradio focus-management issue\n    // where container.focus() is ineffective after canvas clicks.\n    var _mouseOverContainer = false;\n    container.addEventListener(\"mouseenter\", function () { _mouseOverContainer = true; });\n    container.addEventListener(\"mouseleave\", function () { _mouseOverContainer = false; });\n\n    document.addEventListener(\"keydown\", function (e) {\n        // Only handle when mouse is over this container \u2014 but always\n        // allow Escape while drawing a box (mouse may be outside canvas).\n        if (!_mouseOverContainer && !(e.key === \"Escape\" && state.isDrawingBox)) return;\n\n        // Ignore if inside a text-like input or textarea (not range sliders)\n        if (e.target.tagName === \"TEXTAREA\") return;\n        if (e.target.tagName === \"INPUT\" && e.target.type !== \"range\") return;\n\n        // Space hold \u2192 temporary move mode\n        if (e.key === \" \") {\n            e.preventDefault();\n            if (!e.repeat) {\n                state.spaceHeld = true;\n                updateCanvasCursor();\n                renderToolbar();\n            }\n            return;\n        }\n\n        var key = e.key;\n\n        // Number keys 1-8: switch object\n        if (key >= \"1\" && key <= \"8\") {\n            var idx = parseInt(key, 10) - 1;\n            if (idx < state.objects.length) {\n                state.activeObjectIndex = idx;\n                renderToolbar();\n                requestRender();\n            }\n            e.preventDefault();\n            return;\n        }\n\n        switch (key.toLowerCase()) {\n            case \"n\":\n                addObject();\n                e.preventDefault();\n                break;\n            case \"z\":\n                undoLastPrompt();\n                e.preventDefault();\n                break;\n            case \"m\":\n                state.showMasks = !state.showMasks;\n                renderToolbar();\n                requestRender();\n                e.preventDefault();\n                break;\n            case \"v\":\n                state.settingsVisible = !state.settingsVisible;\n                syncVisibility();\n                e.preventDefault();\n                break;\n            case \"h\":\n                state.objects[state.activeObjectIndex].visible = !state.objects[state.activeObjectIndex].visible;\n                renderToolbar();\n                requestRender();\n                e.preventDefault();\n                break;\n            case \"i\":\n                state.showImage = !state.showImage;\n                renderToolbar();\n                requestRender();\n                e.preventDefault();\n                break;\n            case \"c\":\n                state.cutoutMode = !state.cutoutMode;\n                renderToolbar();\n                requestRender();\n                e.preventDefault();\n                break;\n            case \"delete\":\n            case \"backspace\":\n                deleteObject(state.activeObjectIndex);\n                e.preventDefault();\n                break;\n            case \"?\":\n                helpOverlay.classList.toggle(\"hidden\");\n                e.preventDefault();\n                break;\n            case \"f\":\n                toggleMaximize();\n                e.preventDefault();\n                break;\n            case \"escape\":\n                if (state.isDrawingBox) {\n                    state.isDrawingBox = false;\n                    // Reset mouseDownButton so window mousemove won't\n                    // re-enable isDrawingBox.  Keep didDrag=true so the\n                    // subsequent mouseup is treated as a drag (no-op)\n                    // rather than a click that would add a point.\n                    state.mouseDownButton = -1;\n                    requestRender();\n                } else if (state.maximized) {\n                    toggleMaximize();\n                } else {\n                    helpOverlay.classList.add(\"hidden\");\n                }\n                e.preventDefault();\n                break;\n            case \"+\":\n            case \"=\":\n                zoomToCenter(state.zoom * 1.25);\n                e.preventDefault();\n                break;\n            case \"-\":\n                zoomToCenter(state.zoom / 1.25);\n                e.preventDefault();\n                break;\n            case \"0\":\n                resetZoom();\n                updateCanvasCursor();\n                e.preventDefault();\n                break;\n        }\n    });\n\n    // --- Button events ---\n\n    addObjectBtn.addEventListener(\"click\", function () { addObject(); });\n    moveBtn.addEventListener(\"click\", function () {\n        state.moveMode = !state.moveMode;\n        updateCanvasCursor();\n        renderToolbar();\n    });\n    undoBtn.addEventListener(\"click\", function () { undoLastPrompt(); });\n    clearBtn.addEventListener(\"click\", function () { clearActiveObject(); });\n    clearAllBtn.addEventListener(\"click\", function () { clearAll(); });\n    maskToggleBtn.addEventListener(\"click\", function () {\n        state.showMasks = !state.showMasks;\n        renderToolbar();\n        requestRender();\n    });\n    maximizeBtn.addEventListener(\"click\", function () { toggleMaximize(); });\n    helpBtn.addEventListener(\"click\", function () { helpOverlay.classList.toggle(\"hidden\"); });\n    helpCloseBtn.addEventListener(\"click\", function () { helpOverlay.classList.add(\"hidden\"); });\n\n    // Settings panel\n    settingsBtn.addEventListener(\"click\", function () {\n        state.settingsVisible = !state.settingsVisible;\n        syncVisibility();\n    });\n    pointSizeSlider.addEventListener(\"input\", function () {\n        pointRadius = parseInt(pointSizeSlider.value, 10);\n        pointSizeValue.textContent = pointRadius;\n        requestRender();\n    });\n    maskOpacitySlider.addEventListener(\"input\", function () {\n        maskAlpha = parseInt(maskOpacitySlider.value, 10) / 100;\n        maskOpacityValue.textContent = parseInt(maskOpacitySlider.value, 10) + \"%\";\n        requestRender();\n    });\n    boxLineWidthSlider.addEventListener(\"input\", function () {\n        boxLineWidth = parseFloat(boxLineWidthSlider.value);\n        boxLineWidthValue.textContent = boxLineWidth + \"px\";\n        requestRender();\n    });\n    imageToggleBtn.addEventListener(\"click\", function () {\n        state.showImage = !state.showImage;\n        renderToolbar();\n        requestRender();\n    });\n    cutoutBtn.addEventListener(\"click\", function () {\n        state.cutoutMode = !state.cutoutMode;\n        renderToolbar();\n        requestRender();\n    });\n\n    function clearImage() {\n        if (state.objectUrl) URL.revokeObjectURL(state.objectUrl);\n        state.image = null;\n        state.imageUrl = null;\n        state.objectUrl = null;\n        state.filePath = null;\n        state.pendingEmit = false;\n        state.imageSource = null;\n        state.rawMasks = [];\n        state.maskCanvases = [];\n        state.objects = [createEmptyObject(0)];\n        state.activeObjectIndex = 0;\n        state.zoom = 1;\n        state.panX = 0;\n        state.panY = 0;\n        state.moveMode = false;\n        state.cutoutMode = false;\n        state.isProcessing = false;\n        if (state.maximized) {\n            toggleMaximize();\n        }\n        ctx.clearRect(0, 0, canvas.width, canvas.height);\n        syncVisibility();\n        renderToolbar();\n        props.value = null;\n        trigger(\"input\");\n    }\n\n    clearImageBtn.addEventListener(\"click\", function () { clearImage(); });\n\n    // --- File upload (input) ---\n\n    function uploadToServer(file) {\n        var capturedUrl = state.objectUrl;\n\n        upload(file)\n            .then(function (result) {\n                if (state.objectUrl !== capturedUrl) return;\n                state.filePath = result.path;\n                if (state.pendingEmit) {\n                    state.pendingEmit = false;\n                    emitPromptData();\n                }\n            })\n            .catch(function () {\n                if (state.objectUrl !== capturedUrl) return;\n            });\n    }\n\n    function loadImageFile(file) {\n        if (!file || !file.type.startsWith(\"image/\")) return;\n\n        // Revoke previous blob URL\n        if (state.objectUrl) URL.revokeObjectURL(state.objectUrl);\n\n        var url = URL.createObjectURL(file);\n        state.objectUrl = url;\n        state.filePath = null;\n        state.pendingEmit = false;\n        state.imageSource = \"upload\";\n        state.imageUrl = null;\n        state.rawMasks = [];\n        state.maskCanvases = [];\n\n        var img = new Image();\n        img.onload = function () {\n            state.image = img;\n            state.naturalWidth = img.naturalWidth;\n            state.naturalHeight = img.naturalHeight;\n            state.objects = [createEmptyObject(0)];\n            state.activeObjectIndex = 0;\n            state.zoom = 1;\n            state.panX = 0;\n            state.panY = 0;\n            resizeCanvas();\n            renderToolbar();\n            requestRender();\n            emitPromptData();\n        };\n        img.src = url;\n\n        uploadToServer(file);\n    }\n\n    fileInput.addEventListener(\"change\", function () {\n        if (fileInput.files && fileInput.files[0]) {\n            loadImageFile(fileInput.files[0]);\n            fileInput.value = \"\";\n        }\n    });\n\n    dropZone.addEventListener(\"dragover\", function (e) {\n        e.preventDefault();\n        dropZone.classList.add(\"drag-over\");\n    });\n\n    dropZone.addEventListener(\"dragleave\", function () {\n        dropZone.classList.remove(\"drag-over\");\n    });\n\n    dropZone.addEventListener(\"drop\", function (e) {\n        e.preventDefault();\n        dropZone.classList.remove(\"drag-over\");\n        var files = e.dataTransfer && e.dataTransfer.files;\n        if (files && files[0]) {\n            loadImageFile(files[0]);\n        }\n    });\n\n    // Also allow drop on the whole container when image is loaded\n    container.addEventListener(\"dragover\", function (e) {\n        e.preventDefault();\n    });\n\n    container.addEventListener(\"drop\", function (e) {\n        e.preventDefault();\n        var files = e.dataTransfer && e.dataTransfer.files;\n        if (files && files[0] && files[0].type.startsWith(\"image/\")) {\n            loadImageFile(files[0]);\n        }\n    });\n\n    // --- Resize ---\n\n    var resizeObserver = new ResizeObserver(function () {\n        if (state.image) {\n            resizeCanvas();\n            requestRender();\n        }\n    });\n    resizeObserver.observe(canvasWrapper);\n\n    // --- Init ---\n\n    renderToolbar();\n    handleDataUpdate();\n\n})();\n",
  "default_props": {
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    "max_objects": 8,
    "point_radius": 6,
    "mask_alpha": 0.4
  },
  "python_code": "class SamPrompter(gr.HTML):\n    def __init__(\n        self,\n        value: str | Path | Image.Image | np.ndarray | tuple[Any, list[dict[str, Any]]] | None = None,\n        *,\n        label: str | None = None,\n        max_objects: int = 8,\n        point_radius: int = 6,\n        mask_alpha: float = 0.4,\n        **kwargs: Any,  # noqa: ANN401 - forwarded to gr.HTML\n    ) -> None:\n        self.max_objects = max_objects\n        self.point_radius = point_radius\n        self.mask_alpha = mask_alpha\n\n        html_template = (_STATIC_DIR / \"template.html\").read_text(encoding=\"utf-8\")\n        css_template = (_STATIC_DIR / \"style.css\").read_text(encoding=\"utf-8\")\n        js_on_load = (_STATIC_DIR / \"script.js\").read_text(encoding=\"utf-8\")\n\n        super().__init__(\n            value=value,\n            label=label,\n            show_label=label is not None,\n            container=label is not None,\n            html_template=html_template,\n            css_template=css_template,\n            js_on_load=js_on_load,\n            max_objects=max_objects,\n            point_radius=point_radius,\n            mask_alpha=mask_alpha,\n            **kwargs,\n        )\n\n    @staticmethod\n    def clear(\n        value: str | Path | Image.Image | np.ndarray | tuple[Any, list[dict[str, Any]]] | None = None,\n        *,\n        max_objects: int | None = None,\n    ) -> _ClearPrompts:\n        \"\"\"Return a value that clears all user-drawn prompts (points and boxes).\n\n        Pass this as a return value from an event handler to clear the prompts\n        while optionally keeping (or replacing) the displayed image and masks.\n\n        * ``clear()`` \u2014 clears prompts and masks; the current image stays.\n        * ``clear(image)`` \u2014 clears prompts and masks; re-sends the image.\n        * ``clear((image, masks))`` \u2014 clears prompts; re-sends image with\n          new masks.\n\n        Parameters\n        ----------\n        value:\n            Image or (image, masks) tuple to display after clearing.\n        max_objects:\n            If given, dynamically update the maximum number of objects the\n            frontend allows.\n\n        Example usage::\n\n            prompter = SamPrompter()\n\n\n            # Clear prompts and masks, keep the current image as-is\n            def on_clear():\n                return SamPrompter.clear()\n\n\n            # Clear prompts and masks, re-send the image\n            def on_clear_with_image(image):\n                return SamPrompter.clear(image)\n        \"\"\"\n        return _ClearPrompts(value, max_objects=max_objects)\n\n    def postprocess(\n        self,\n        value: str | Path | Image.Image | np.ndarray | tuple[Any, list[dict[str, Any]]] | _ClearPrompts | None,\n    ) -> str | None:\n        clear_prompts = False\n        max_objects_override: int | None = None\n        if isinstance(value, _ClearPrompts):\n            clear_prompts = True\n            max_objects_override = value.max_objects\n            value = value.value\n\n        if value is None:\n            if clear_prompts:\n                result: dict[str, Any] = {\"clearPrompts\": True}\n                if max_objects_override is not None:\n                    result[\"maxObjects\"] = max_objects_override\n                return json.dumps(result)\n            return None\n\n        if isinstance(value, tuple):\n            image_source, masks_list = value\n        else:\n            image_source, masks_list = value, []\n        img = _load_image(image_source)\n        image_url = _save_image_to_cache(img, self.GRADIO_CACHE)\n\n        encoded_masks = []\n        for i, mask_info in enumerate(masks_list):\n            mask_array = mask_info[\"mask\"]\n            if isinstance(mask_array, Image.Image):\n                mask_array = np.array(mask_array)\n            binary = (mask_array > 0).astype(np.uint8)\n            color = mask_info.get(\"color\") or _hex_to_rgb(_COLOR_PALETTE[i % len(_COLOR_PALETTE)])\n            alpha = mask_info.get(\"alpha\", self.mask_alpha)\n            encoded_masks.append(\n                {\n                    \"rle\": _encode_mask_to_rle(binary),\n                    \"color\": color,\n                    \"alpha\": alpha,\n                }\n            )\n\n        payload = {\n            \"image\": image_url,\n            \"width\": img.width,\n            \"height\": img.height,\n            \"masks\": encoded_masks,\n        }\n        if clear_prompts:\n            payload[\"clearPrompts\"] = True\n        if max_objects_override is not None:\n            payload[\"maxObjects\"] = max_objects_override\n        return json.dumps(payload)\n\n    def preprocess(self, payload: Any) -> dict[str, Any] | None:  # noqa: ANN401 - Gradio override\n        \"\"\"Parse the raw JSON string from the frontend into a dict.\n\n        Delegates to :func:`parse_prompt_value` so that event handlers\n        receive a ready-to-use ``dict | None`` instead of a raw string.\n        \"\"\"\n        return parse_prompt_value(payload)\n\n    def process_example(self, value: Any) -> str | None:  # noqa: ANN401 - Gradio override\n        \"\"\"Return an HTML ``<img>`` tag for the ``gr.Examples`` gallery.\n\n        ``gr.Examples`` calls ``process_example()`` (via ``as_example()``) to\n        obtain display HTML for the examples gallery.  The default\n        implementation delegates to ``postprocess()``, which returns a JSON\n        payload \u2014 resulting in raw JSON text in the gallery.  This override\n        produces a proper thumbnail instead.\n        \"\"\"\n        if value is None:\n            return None\n        image_source = value[0] if isinstance(value, tuple) else value\n        img = _load_image(image_source)\n        url = _save_image_to_cache(img, self.GRADIO_CACHE)\n        safe_url = html.escape(url, quote=True)\n        return f'<img src=\"{safe_url}\" alt=\"example\" style=\"max-width:100%;max-height:5rem;object-fit:contain;display:block;border-radius:4px;\">'\n\n    def api_info(self) -> dict[str, Any]:\n        return {\n            \"type\": \"object\",\n            \"description\": (\n                \"JSON string with SAM prompter data. \"\n                \"Input from JS: {imagePath?: string, imageSize?: {width, height}, \"\n                \"prompts: [{points: [[x,y],...], labels: [1,0,...], boxes: [[x1,y1,x2,y2],...]},...]}. \"\n                \"Output from Python: a plain image (str path, PIL Image, or ndarray) \"\n                \"or a tuple (image, masks_list) where masks_list is \"\n                \"[{rle: {counts: [int,...], size: [H,W]}, color: [R,G,B], alpha: float},...]. \"\n                \"Serialized as {image: string, width: int, height: int, masks: [...], colors: [...]}\"\n            ),\n        }\n",
  "head": "",
  "repo_url": "https://github.com/hysts/gradio-sam-prompter"
}