Activate group name toggle based on horizontal space

1 files changed, 33 insertions, 9 deletions

diff --git a/app/assets/javascripts/group_name.js b/app/assets/javascripts/group_name.js
index 6a028f299b1..62675d7e67e 100644
--- a/app/assets/javascripts/group_name.js
+++ b/app/assets/javascripts/group_name.js
@@ -1,40 +1,64 @@
-const GROUP_LIMIT = 2;
+
+import _ from 'underscore';
 
 export default class GroupName {
   constructor() {
-    this.titleContainer = document.querySelector('.title');
-    this.groups = document.querySelectorAll('.group-path');
+    this.titleContainer = document.querySelector('.title-container');
+    this.title = document.querySelector('.title');
+    this.titleWidth = this.title.offsetWidth;
     this.groupTitle = document.querySelector('.group-title');
+    this.groups = document.querySelectorAll('.group-path');
     this.toggle = null;
     this.isHidden = false;
     this.init();
   }
 
   init() {
-    if (this.groups.length > GROUP_LIMIT) {
+    if (this.groups.length > 0) {
       this.groups[this.groups.length - 1].classList.remove('hidable');
-      this.addToggle();
+      this.toggleHandler();
+      window.addEventListener('resize', _.debounce(this.toggleHandler.bind(this), 100));
     }
     this.render();
   }
 
-  addToggle() {
-    const header = document.querySelector('.header-content');
+  toggleHandler() {
+    if (this.titleWidth > this.titleContainer.offsetWidth) {
+      if (!this.toggle) this.createToggle();
+      this.showToggle();
+    } else if (this.toggle) {
+      this.hideToggle();
+    }
+  }
+
+  createToggle() {
     this.toggle = document.createElement('button');
     this.toggle.className = 'text-expander group-name-toggle';
     this.toggle.setAttribute('aria-label', 'Toggle full path');
     this.toggle.innerHTML = '...';
     this.toggle.addEventListener('click', this.toggleGroups.bind(this));
-    header.insertBefore(this.toggle, this.titleContainer);
+    this.titleContainer.insertBefore(this.toggle, this.title);
     this.toggleGroups();
   }
 
+  showToggle() {
+    this.title.classList.add('wrap');
+    this.toggle.classList.remove('hidden');
+    if (this.isHidden) this.groupTitle.classList.add('is-hidden');
+  }
+
+  hideToggle() {
+    this.title.classList.remove('wrap');
+    this.toggle.classList.add('hidden');
+    if (this.isHidden) this.groupTitle.classList.remove('is-hidden');
+  }
+
   toggleGroups() {
     this.isHidden = !this.isHidden;
     this.groupTitle.classList.toggle('is-hidden');
   }
 
   render() {
-    this.titleContainer.classList.remove('initializing');
+    this.title.classList.remove('initializing');
   }
 }