InDesign script to apply an object style to images by the name of their frame.

Apply object style to images.jsx

//DESCRIPTION:Apply an object style to placed images inside frames by the name of their frame.

//by Jorge Hernández Valiñani (@Estudio Fénix) + Codex (GPT-5)

#target indesign

(function() {
    var UNDO_LABEL = "Aplicar estilo de objeto a imágenes";
    var DIALOG_TITLE = "Aplicar estilo de objeto a contenido";
    var ALERT_SELECT_GRAPHIC_FRAME = "Escoge un marco gráfico con una imagen colocada.";
    var ALERT_FRAME_NAME_REQUIRED = "El marco seleccionado no tiene nombre. Asigna un nombre al marco para continuar.";
    var ALERT_OPEN_DOCUMENT = "Abre un documento antes de ejecutar el script.";
    var ALERT_NO_OBJECT_STYLES = "No hay estilos de objeto disponibles en el documento.";
    var UI_LABEL_OBJECTS_WITH_NAME = "Marcos con nombre:";
    var UI_LABEL_OBJECT_STYLE = "Estilo de objeto:";
    var UI_BUTTON_CANCEL = "Cancelar";
    var UI_BUTTON_OK = "OK";
    var ALERT_DONE_PREFIX = "Listo.\nMarcos revisados con nombre \"";
    var ALERT_DONE_MIDDLE = "\": ";
    var ALERT_DONE_SUFFIX = "\nContenidos con estilo aplicado: ";

    app.doScript(
        main,
        ScriptLanguage.JAVASCRIPT,
        undefined,
        UndoModes.ENTIRE_SCRIPT,
        UNDO_LABEL
    );

    function main() {
    if (app.documents.length === 0) {
        alert(ALERT_OPEN_DOCUMENT);
        return;
    }

    var doc = app.activeDocument;

    if (app.selection.length !== 1) {
        alert(ALERT_SELECT_GRAPHIC_FRAME);
        return;
    }

    var selectedFrame = resolveSelectedFrame(app.selection[0]);
    if (!selectedFrame || !selectedFrame.isValid) {
        alert(ALERT_SELECT_GRAPHIC_FRAME);
        return;
    }
    if (!selectedFrame.name || selectedFrame.name === "") {
        alert(ALERT_FRAME_NAME_REQUIRED);
        return;
    }

    var selectedImages = collectImagesFromFrame(selectedFrame);
    if (selectedImages.length === 0) {
        alert(ALERT_SELECT_GRAPHIC_FRAME);
        return;
    }

    var objectStyles = collectAllObjectStyles(doc);
    if (objectStyles.length === 0) {
        alert(ALERT_NO_OBJECT_STYLES);
        return;
    }

    var styleNames = [];
    var i;
    for (i = 0; i < objectStyles.length; i++) {
        styleNames.push(objectStyles[i].name);
    }

    var targetName = selectedFrame.name;

    /*
    Code for Import https://scriptui.joonas.me — (Triple click to select): 
    {"activeId":0,"items":{"item-0":{"id":0,"type":"Dialog","parentId":false,"style":{"enabled":true,"varName":null,"windowType":"Dialog","creationProps":{"su1PanelCoordinates":false,"maximizeButton":false,"minimizeButton":false,"independent":false,"closeButton":true,"borderless":false,"resizeable":false},"text":"Aplicar estilo de objeto a contenido","preferredSize":[0,0],"margins":16,"orientation":"column","spacing":10,"alignChildren":["left","top"]}},"item-1":{"id":1,"type":"Group","parentId":0,"style":{"enabled":true,"varName":null,"preferredSize":[0,0],"margins":0,"orientation":"row","spacing":10,"alignChildren":["left","center"],"alignment":null}},"item-2":{"id":2,"type":"StaticText","parentId":1,"style":{"enabled":true,"varName":null,"creationProps":{"truncate":"none","multiline":false,"scrolling":false},"softWrap":false,"text":"Objetos con nombre:","justify":"left","preferredSize":[0,0],"alignment":null,"helpTip":null}},"item-3":{"id":3,"type":"StaticText","parentId":1,"style":{"enabled":true,"varName":null,"creationProps":{"truncate":"none","multiline":false,"scrolling":false},"softWrap":false,"text":"StaticText","justify":"left","preferredSize":[0,0],"alignment":null,"helpTip":null}},"item-4":{"id":4,"type":"Group","parentId":0,"style":{"enabled":true,"varName":null,"preferredSize":[0,0],"margins":0,"orientation":"row","spacing":10,"alignChildren":["left","center"],"alignment":null}},"item-5":{"id":5,"type":"StaticText","parentId":4,"style":{"enabled":true,"varName":null,"creationProps":{"truncate":"none","multiline":false,"scrolling":false},"softWrap":false,"text":"Estilo de objeto:","justify":"left","preferredSize":[0,0],"alignment":null,"helpTip":null}},"item-6":{"id":6,"type":"DropDownList","parentId":4,"style":{"enabled":true,"varName":null,"text":"DropDownList","listItems":"Item 1, -, Item 2","preferredSize":[0,0],"alignment":null,"selection":0,"helpTip":null}},"item-7":{"id":7,"type":"Group","parentId":0,"style":{"enabled":true,"varName":null,"preferredSize":[0,0],"margins":[10,0,0,0],"orientation":"row","spacing":10,"alignChildren":["right","top"],"alignment":"fill"}},"item-8":{"id":8,"type":"Button","parentId":7,"style":{"enabled":true,"varName":null,"text":"Cancelar","justify":"center","preferredSize":[80,0],"alignment":null,"helpTip":null}},"item-9":{"id":9,"type":"Button","parentId":7,"style":{"enabled":true,"varName":"ok","text":"OK","justify":"center","preferredSize":[80,0],"alignment":null,"helpTip":null}}},"order":[0,1,2,3,4,5,6,7,8,9],"settings":{"importJSON":true,"indentSize":false,"cepExport":false,"includeCSSJS":true,"showDialog":true,"functionWrapper":false,"afterEffectsDockable":false,"itemReferenceList":"None"}}
    */ 
    var dialogWindow = new Window("dialog");
    dialogWindow.text = DIALOG_TITLE;
    dialogWindow.orientation = "column";
    dialogWindow.alignChildren = ["left", "top"];
    dialogWindow.spacing = 10;
    dialogWindow.margins = 16;

    var nameGroup = dialogWindow.add("group", undefined, { name: "nameGroup" });
    nameGroup.orientation = "row";
    nameGroup.alignChildren = ["left", "center"];
    nameGroup.spacing = 10;
    nameGroup.margins = 0;

    var objectsLabel = nameGroup.add("statictext", undefined, UI_LABEL_OBJECTS_WITH_NAME, { name: "objectsLabel" });
    objectsLabel.text = UI_LABEL_OBJECTS_WITH_NAME;
    var nameValueLabel = nameGroup.add("statictext", undefined, targetName, { name: "nameValueLabel" });
    nameValueLabel.text = targetName;

    var styleGroup = dialogWindow.add("group", undefined, { name: "styleGroup" });
    styleGroup.orientation = "row";
    styleGroup.alignChildren = ["left", "center"];
    styleGroup.spacing = 10;
    styleGroup.margins = 0;

    var styleLabel = styleGroup.add("statictext", undefined, UI_LABEL_OBJECT_STYLE, { name: "styleLabel" });
    styleLabel.text = UI_LABEL_OBJECT_STYLE;
    var styleDropdown = styleGroup.add("dropdownlist", undefined, styleNames, { name: "styleDropdown" });
    styleDropdown.selection = 0;

    var buttonGroup = dialogWindow.add("group", undefined, { name: "buttonGroup" });
    buttonGroup.orientation = "row";
    buttonGroup.alignChildren = ["right", "top"];
    buttonGroup.spacing = 10;
    buttonGroup.margins = [0, 10, 0, 0];
    buttonGroup.alignment = ["fill", "top"];

    var cancelButton = buttonGroup.add("button", undefined, UI_BUTTON_CANCEL, { name: "cancel" });
    cancelButton.preferredSize.width = 80;
    var okButton = buttonGroup.add("button", undefined, UI_BUTTON_OK, { name: "ok" });
    okButton.preferredSize.width = 80;

    var selectedStyleIndex = 0;
    if (dialogWindow.show() !== 1) {
        dialogWindow.close();
        return;
    }
    selectedStyleIndex = styleDropdown.selection ? styleDropdown.selection.index : 0;
    dialogWindow.close();

    if (selectedStyleIndex < 0 || selectedStyleIndex >= objectStyles.length) {
        selectedStyleIndex = 0;
    }
    var selectedStyle = objectStyles[selectedStyleIndex];

    var appliedCount = 0;
    var visitedFrames = 0;
    var items = doc.allPageItems;

    for (i = 0; i < items.length; i++) {
        var it = items[i];
        if (!it || !it.isValid) continue;
        if (!it.name || it.name !== targetName) continue;

        var imgs = collectImagesFromFrame(it);
        if (imgs.length === 0) continue;

        visitedFrames++;

        for (var j = 0; j < imgs.length; j++) {
            var img = imgs[j];
            try {
                img.appliedObjectStyle = selectedStyle;
                appliedCount++;
            } catch (_e) {
                // Ignore items that do not accept object style assignment.
            }
        }
    }

    // alert(ALERT_DONE_PREFIX + targetName + ALERT_DONE_MIDDLE + visitedFrames + ALERT_DONE_SUFFIX + appliedCount);

    function resolveSelectedFrame(sel) {
        if (!sel || !sel.isValid) return null;

        var n = safeCtorName(sel);
        if (n === "Rectangle" || n === "Oval" || n === "Polygon") {
            return sel;
        }

        if (n === "Image" || n === "PDF" || n === "ImportedPage") {
            try {
                if (sel.parent && sel.parent.isValid) return sel.parent;
            } catch (_e) {}
        }

        return null;
    }

    function safeCtorName(obj) {
        try {
            return obj.constructor && obj.constructor.name ? obj.constructor.name : "";
        } catch (_e) {
            return "";
        }
    }

    function collectImagesFromFrame(frame) {
        var out = [];
        if (!frame || !frame.isValid) return out;

        try {
            for (var k = 0; k < frame.images.length; k++) {
                var im = frame.images[k];
                if (im && im.isValid) out.push(im);
            }
        } catch (_e) {}

        return out;
    }

    function collectAllObjectStyles(documentRef) {
        var out = [];
        var seen = {};
        if (!documentRef || !documentRef.isValid) return out;

        try {
            for (var idx = 0; idx < documentRef.objectStyles.length; idx++) {
                var st = documentRef.objectStyles[idx];
                pushStyleIfNew(st, out, seen);
            }
        } catch (_e) {}

        try {
            for (var g = 0; g < documentRef.objectStyleGroups.length; g++) {
                collectStylesFromGroup(documentRef.objectStyleGroups[g], out, seen);
            }
        } catch (_e) {}

        return out;
    }

    function collectStylesFromGroup(group, out, seen) {
        if (!group || !group.isValid) return;

        try {
            for (var i = 0; i < group.objectStyles.length; i++) {
                pushStyleIfNew(group.objectStyles[i], out, seen);
            }
        } catch (_e) {}

        try {
            for (var j = 0; j < group.objectStyleGroups.length; j++) {
                collectStylesFromGroup(group.objectStyleGroups[j], out, seen);
            }
        } catch (_e) {}
    }

    function pushStyleIfNew(styleRef, out, seen) {
        if (!styleRef || !styleRef.isValid) return;
        var key;
        try { key = styleRef.toSpecifier(); } catch (_e) { key = styleRef.name; }
        if (seen[key]) return;
        seen[key] = true;
        out.push(styleRef);
    }
    }
})();