From 1a246b76a3663bc1f7eb9d9f63060cd10b8bac66 Mon Sep 17 00:00:00 2001
From: Prateeksha Singh <pratu16x7@gmail.com>
Date: Thu, 29 Mar 2018 10:50:00 +0530
Subject: [PATCH] [ui] UI Tree

---
 client/ui/tree.js | 179 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)
 create mode 100644 client/ui/tree.js

diff --git a/client/ui/tree.js b/client/ui/tree.js
new file mode 100644
index 00000000..8230540e
--- /dev/null
+++ b/client/ui/tree.js
@@ -0,0 +1,179 @@
+const frappe = require('frappejs');
+const bootstrap = require('bootstrap');
+const $ = require('jquery');
+const octicons = require('octicons');
+const utils = require('frappejs/client/ui/utils');
+
+const triangleRight = octicons["triangle-right"].toSVG({ "width": 5, "class": "node-parent"});
+const triangleDown = octicons["triangle-down"].toSVG({ "width": 10, "class": "node-parent"});
+const triangleLeft = octicons["triangle-left"].toSVG({ "width": 5, "class": "node-leaf"});
+// const octiconPrimitiveDot = octicons["octicon-primitive-dot"].toSVG({ "width": 7, "class": "node-leaf"});
+// add node classes later
+
+class Tree {
+    constructor({parent, label, iconSet, withSkeleton=1, method}) {
+		Object.assign(this, arguments[0]);
+		this.nodes = {};
+		if(!iconSet) {
+			this.iconSet = {
+				open: triangleDown,
+				closed: triangleRight,
+				leaf: triangleLeft
+			};
+		}
+		this.make();
+    }
+
+    make() {
+		this.tree = frappe.ui.create('div', {
+			inside: this.parent,
+			className: 'tree'
+		});
+		if(this.withSkeleton) this.tree.classList.add('tree-with-skeleton');
+
+		this.rootNode = this.makeNode(this.label, this.label, true, null, this.tree);
+		this.expandNode(this.rootNode, false);
+	}
+
+	refresh() {
+		// this.selectedNode.parentNode &&
+		// 	this.loadChildren(this.selectedNode.parentNode, true);
+	}
+
+	loadChildren(node, deep=false) {
+		if(!deep) {
+			this.renderNodeChildren(node, this.method(node.value));
+		} else {
+			this.renderChildrenDeep(node, this.getAllNodes(node.value));
+		}
+	}
+
+	renderChildrenDeep(dataList) {
+		dataList.map(d => { this.renderNodeChildren(this.nodes[d.parent], d.data); });
+	}
+
+	renderNodeChildren(node, dataSet) {
+		console.log("dataSet", dataSet);
+		frappe.ui.empty(node.$childrenList);
+
+		dataSet.forEach(data => {
+			let parentNode = this.nodes[node.value];
+			let childNode = this.makeNode(data.label || data.value, data.value,
+				data.expandable, parentNode);
+			childNode.$treeLink.dataset.nodeData = data;
+		});
+		node.expanded = false;
+
+		// As children loaded
+		node.loaded = true;
+		this.expandNode(node);
+	}
+
+	getAllNodes() { }
+
+	makeNode(label, value, expandable, parentNode, parentEl) {
+		let node = {
+			parent: parent,
+			label: label,
+			value: value,
+			loaded: 0,
+			expanded: 0,
+			expandable: expandable,
+		};
+
+		if(parentNode){
+			node.parentNode = parentNode;
+			node.parent = parentNode.$childrenList;
+			node.isRoot = 0;
+		} else {
+			node.isRoot = 1;
+			node.parent = parentEl;
+		}
+
+		this.nodes[value] = node;
+		this.buildNodeElement(node);
+		this.onRender && this.onRender(node);
+
+		return node;
+	}
+
+	buildNodeElement(node) {
+		let parentLi = frappe.ui.create('li', {
+			inside: node.parent,
+			className: 'tree-node'
+		});
+
+		let iconHtml = '';
+		if(this.iconSet) {
+			iconHtml = node.expandable ? this.iconSet.closed : this.iconSet.leaf;
+		}
+		let $label = `<a class="tree-label"> ${node.label}</a>`;
+
+		node.$treeLink = frappe.ui.create('span', {
+			inside: parentLi,
+			className: 'tree-link',
+			'data-label': node.label,
+			innerHTML: iconHtml + $label
+		});
+		node.$treeLink.dataset.node = node;
+		node.$treeLink.addEventListener('click', () => {
+			console.log('clicked');
+			this.onNodeClick(node);
+		});
+
+		node.$childrenList = frappe.ui.create('ul', {
+			inside: parentLi,
+			className: 'tree-children hide'
+		});
+
+		// if(this.toolbar) {
+		// 	node.$toolbar = this.getToolbar(node).insertAfter(node.$treeLink);
+		// }
+	}
+
+	onNodeClick(node, click = true) {
+		this.setSelectedNode(node);
+		if(click) {
+			this.onClick && this.onClick(node);
+		}
+		this.expandNode(node);
+		// select link
+		utils.activate(this.tree, node.$treeLink, 'tree-link', 'active');
+		if(node.$toolbar) this.showToolbar(node);
+	}
+
+	expandNode(node) {
+		if(node.expandable) {
+			this.toggleNode(node);
+		}
+
+		node.expanded = !node.expanded;
+		node.parent.classList.toggle('opened', node.expanded);
+	}
+
+	toggleNode(node) {
+		if(!node.loaded) return this.loadChildren(node);
+
+		// expand children
+		if(node.$childrenList) {
+			if(node.$childrenList.innerHTML.length) {
+				node.$childrenList.classList.toggle('hide', !node.expanded);
+			}
+
+			// open close icon
+			if(this.iconSet) {
+				const oldIcon = node.$treeLink.querySelector('svg');
+				const newIconKey = !node.expanded ? 'closed' : 'open';
+				// node.$treeLink.replaceChild(oldIcon, this.iconSet[newIconKey]);
+			}
+		}
+	}
+
+	getSelectedNode() { return this.selectedNode; }
+
+	setSelectedNode(node) { this.selectedNode = node; }
+
+	showToolbar() { }
+}
+
+module.exports = Tree;