standard widget => collapsible widget

src/public/javascripts/widgets/collapsible_widget.js

@@ -0,0 +1,91 @@
+import utils from "../services/utils.js";
+import TabAwareWidget from "./tab_aware_widget.js";
+
+const WIDGET_TPL = `
+<div class="card widget">
+    <div class="card-header">
+        <div>           
+            <button class="btn btn-sm widget-title" data-toggle="collapse" data-target="#[to be set]">
+                Collapsible Group Item
+            </button>
+            
+            <a class="widget-help external no-arrow bx bx-info-circle"></a>
+        </div>
+        
+        <div class="widget-header-actions"></div>
+    </div>
+
+    <div id="[to be set]" class="collapse body-wrapper" style="transition: none;">
+        <div class="card-body"></div>
+    </div>
+</div>
+`;
+
+class CollapsibleWidget extends TabAwareWidget {
+    getWidgetTitle() { return "Untitled widget"; }
+
+    getHeaderActions() { return []; }
+
+    getHelp() { return {}; }
+
+    getMaxHeight() { return null; }
+
+    render() {
+        this.$widget = $(WIDGET_TPL);
+        this.$widget.find('[data-target]').attr('data-target', "#" + this.componentId);
+
+        this.$bodyWrapper = this.$widget.find('.body-wrapper');
+        this.$bodyWrapper.attr('id', this.componentId);
+
+        this.$bodyWrapper.collapse("show");
+
+        this.$body = this.$bodyWrapper.find('.card-body');
+
+        const maxHeight = this.getMaxHeight();
+
+        if (maxHeight) {
+            this.$body.css("max-height", maxHeight);
+            this.$body.css("overflow", "auto");
+        }
+
+        this.$title = this.$widget.find('.widget-title');
+        this.$title.text(this.getWidgetTitle());
+
+        this.$help = this.$widget.find('.widget-help');
+        const help = this.getHelp();
+
+        if (help.title) {
+            this.$help.attr("title", help.title);
+            this.$help.attr("href", help.url || "javascript:");
+
+            if (!help.url) {
+                this.$help.addClass('no-link');
+            }
+        }
+        else {
+            this.$help.hide();
+        }
+
+        this.$headerActions = this.$widget.find('.widget-header-actions');
+        this.$headerActions.append(...this.getHeaderActions());
+
+        this.initialized = this.renderBody();
+
+        return this.$widget;
+    }
+
+    async renderBody() {
+        await this.doRenderBody();
+    }
+
+    /** for overriding */
+    async doRenderBody() {}
+
+    isExpanded() {
+        return this.$bodyWrapper.hasClass("show");
+    }
+
+    cleanup() {}
+}
+
+export default CollapsibleWidget;