Change integration configuration page (#3372)

I've refactored the user query code to be able to use it also on the
integration configuration page. Now, items can be re-organized as in
the user query list.

1 files changed, 97 insertions, 0 deletions

diff --git a/p/scripts/draggable.js b/p/scripts/draggable.js
new file mode 100644
index 000000000..d9d1d1cc0
--- /dev/null
+++ b/p/scripts/draggable.js
@@ -0,0 +1,97 @@
+// @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-3.0
+"use strict";
+/* jshint esversion:6, strict:global */
+
+const init_draggable_list = function() {
+	if (!window.context) {
+		if (window.console) {
+			console.log('FreshRSS draggable list waiting for JS…');
+		}
+		setTimeout(init_draggable_list, 50);
+		return;
+	}
+
+	let source;
+	const draggableList = document.querySelector('.draggableList');
+	const addMarker = (position, element) => {
+		const hr = draggableList.querySelector('hr.drag-drop-marker');
+		if (null === hr) {
+			element.insertAdjacentHTML(position, '<hr class="drag-drop-marker" />');
+		}
+	};
+	const removeMarker = () => {
+		const hr = draggableList.querySelector('hr.drag-drop-marker');
+		if (null !== hr) {
+			hr.remove();
+		}
+	};
+
+	draggableList.addEventListener('dragstart', event => {
+		source = event.target.closest('[draggable="true"]');
+		event.dataTransfer.setData('text/html', source.outerHTML);
+		event.dataTransfer.effectAllowed = 'move';
+	});
+	draggableList.addEventListener('dragover', event => {
+		event.preventDefault();
+		if (!event.target || !event.target.closest) {
+			return;
+		}
+
+		const draggableItem = event.target.closest('[draggable="true"]');
+		if (null === draggableItem || source === draggableItem) {
+			return;
+		}
+
+		const rect = draggableItem.getBoundingClientRect();
+		if (event.clientY < (rect.top + rect.height / 2)) {
+			addMarker('beforebegin', draggableItem);
+		} else {
+			addMarker('afterend', draggableItem);
+		}
+	});
+	draggableList.addEventListener('dragleave', event => {
+		event.preventDefault();
+		removeMarker();
+	});
+	draggableList.addEventListener('drop', event => {
+		event.preventDefault();
+		event.stopPropagation();
+		if (!event.target || !event.target.closest) {
+			return;
+		}
+
+		const draggableItem = event.target.closest('[draggable="true"]');
+		if (null === draggableItem || source === draggableItem) {
+			return;
+		}
+
+		const rect = draggableItem.getBoundingClientRect();
+		if (event.clientY < (rect.top + rect.height / 2)) {
+			draggableItem.insertAdjacentHTML('beforebegin', event.dataTransfer.getData('text/html'));
+		} else {
+			draggableItem.insertAdjacentHTML('afterend', event.dataTransfer.getData('text/html'));
+		}
+		source.remove();
+		removeMarker();
+		draggableList.submit();
+	});
+
+	// This is needed to work around a Firefox bug → https://bugzilla.mozilla.org/show_bug.cgi?id=800050
+	draggableList.addEventListener('focusin', event => {
+		if (!event.target || !event.target.closest) {
+			return;
+		}
+
+		const itemName = event.target.closest('input[type="text"]');
+		if (null !== itemName) {
+			itemName.select();
+		}
+	});
+};
+
+if (document.readyState && document.readyState !== 'loading') {
+	init_draggable_list();
+} else if (document.addEventListener) {
+	document.addEventListener('DOMContentLoaded', event => init_draggable_list(), false);
+}
+// @license-end