Improvements and cleanup

tp-vsplitter.js

@@ -11,7 +11,16 @@ class TpVSplitter extends LitElement {
       css`
         :host {
           display: grid;
-          grid-template-columns: 1fr 5px 1fr;
+          grid-template-columns: 1fr var(--tp-splitter-width, 5px) 1fr;
+        }
+
+        :host([lefthidden]),
+        :host([righthidden]) {
+          grid-template-rows: 1fr !important;
+        }
+
+        [hidden] {
+          display: none !important;
         }
 
         #left,
@@ -20,13 +29,13 @@ class TpVSplitter extends LitElement {
           overflow: hidden;
         }
 
-        .splitter {
+        #splitter {
           background: var(--tp-splitter-line-color, #3b3b3b);
           cursor: col-resize;
           opacity: 1;
         }
 
-        .splitter:hover {
+        #splitter:hover {
           background: var(--tp-splitter-line-color-hover, #007dd1);
           opacity: 0.5;
         }
@@ -35,17 +44,21 @@ class TpVSplitter extends LitElement {
   }
 
   render() {
+    const { leftHidden, rightHidden } = this;
+
     return html`
-      <div id="left"><slot name="left"></slot></div>
-      <div class="splitter" @mousedown=${this._enableDrag}></div>
-      <div id="right"><slot name="right"></slot></div>
+      <div id="left" part="left" ?hidden=${leftHidden}><slot name="left"></slot></div>
+      <div id="splitter" part="splitter" @mousedown=${this._enableDrag}></div>
+      <div id="right" part="right" ?hidden=${rightHidden}><slot name="right"></slot></div>
     `;
   }
 
   static get properties() {
     return {
-      columns: { type: String },
-      _dragging: { type: Boolean },
+      leftHidden: { type: Boolean },
+      rightHidden: { type: Boolean },
+      dragging: { type: Boolean },
+      minSideWidth: { type: Number },
     };
   }
 
@@ -64,12 +77,11 @@ class TpVSplitter extends LitElement {
     return this.shadowRoot.querySelector('#right');
   }
 
-  shouldUpdate(changes) {
-    if (changes.has('columns')) {
-      this.style.gridTemplateColumns = this.columns;
-    }
-
-    return true;
+  disconnectedCallback() {
+    super.disconnectedCallback();
+    document.removeEventListener('mouseup', this._disableDrag)
+    document.removeEventListener('mousemove', this._resize);
+    document.body.style['userSelect'] = '';
   }
 
   _enableDrag(e) {
@@ -77,21 +89,30 @@ class TpVSplitter extends LitElement {
     document.addEventListener('mousemove', this._resize);
     document.body.style['userSelect'] = 'none';
     this._startX = e.clientX;
-    this._topWidth = this.left.offsetWidth;
-    this._dragging = true;
+    this._leftWidth = this.left.offsetWidth;
+    this.dragging = true;
   }
 
   _disableDrag() {
     document.removeEventListener('mouseup', this._disableDrag)
     document.removeEventListener('mousemove', this._resize);
     document.body.style['userSelect'] = '';
-    this._dragging = false;
+    this.dragging = false;
     this.dispatchEvent(new CustomEvent('resize-done', { detail: this.style.gridTemplateColumns, bubbles: true, composed: true }));
   }
 
   _resize(e) {
     const delta = e.clientX - this._startX;
-    this.style.gridTemplateColumns = `${this._topWidth + delta}px 5px 1fr`;
+    const totalWidth = this.offsetWidth;
+    const minWidth = this.minSideWidth || 0; // Minimum width in pixels for each side
+
+    // Get splitter width from CSS variable or default to 5 pixels.
+    const splitterWidth = parseInt(getComputedStyle(this).getPropertyValue('--tp-splitter-width')) || 5;
+    
+    // Calculate new left width while ensuring it stays within bounds.
+    let newLeftWidth = Math.max(minWidth, Math.min(this._leftWidth + delta, totalWidth - splitterWidth - minWidth));
+    
+    this.style.gridTemplateColumns = `${newLeftWidth}px ${splitterWidth}px 1fr`;
     this.dispatchEvent(new CustomEvent('resized', { detail: null, bubbles: true, composed: true }));
   }
 }