1 files changed, 91 insertions, 0 deletions
diff --git a/src/shadow.js b/src/shadow.js
new file mode 100644
index 0000000..f4964ad
--- /dev/null
+++ b/src/shadow.js
@@ -0,0 +1,91 @@
+export default class Shadow {
+  zIndex = '100'
+
+  constructor(image) {
+    // create shadow image
+    const shadowImage = document.createElement('img');
+    shadowImage.src = image.src;
+    shadowImage.id = `libo-shadow-${image.id}`;
+    shadowImage.classList.add('libo-shadow');
+
+    // style and position shadow image
+    shadowImage.style.top = image.offsetTop;
+    shadowImage.style.left = image.offsetLeft;
+    shadowImage.style.width = image.offsetWidth;
+    shadowImage.style.height = image.offsetHeight;
+    shadowImage.style.zIndex = this.zIndex;
+
+    // append shadow image to body
+    document.body.appendChild(shadowImage);
+
+    this.element = shadowImage;
+    return this;
+  }
+
+  zoom() {
+    // get starting state
+    const startingState = {
+      top: this.element.offsetTop,
+      left: this.element.offsetLeft,
+      width: this.element.offsetWidth,
+      height: this.element.offsetHeight
+    }
+
+    // temporarily finalize element
+    // and get final state
+    this.element.classList.add('zoomed');
+    this.element.style.width = 'unset';
+    this.element.style.height = 'unset';
+
+    const finalState = {
+      top: this.element.offsetTop,
+      left: this.element.offsetLeft,
+      width: this.element.offsetWidth,
+      height: this.element.offsetHeight
+    }
+
+    // re-initialize element and play animation
+    this.element.classList.remove('zoomed');
+    this.animate(startingState, finalState)
+  }
+
+  animate(startingState, finalState) {
+    // Set up the interval for smooth transition
+    const steps = 20; // Number of steps for smoothness
+    let step = 0;
+
+    // Using requestAnimationFrame for smoother animation
+    const frame = () => {
+      // Calculate the progress (from 0 to 1)
+      const progress = step / steps;
+
+      // Interpolate the current values based on progress
+      const currentTop = startingState.top + (finalState.top - startingState.top) * progress;
+      const currentLeft = startingState.left + (finalState.left - startingState.left) * progress;
+      const currentWidth = startingState.width + (finalState.width - startingState.width) * progress;
+      const currentHeight = startingState.height + (finalState.height - startingState.height) * progress;
+
+      // Update the element's style
+      this.element.style.top = `${currentTop}px`;
+      this.element.style.left = `${currentLeft}px`;
+      this.element.style.width = `${currentWidth}px`;
+      this.element.style.height = `${currentHeight}px`;
+
+      // Log current size for debugging
+      console.log(`Step ${step}: ${currentWidth}, ${currentHeight}`);
+
+      // Increase the step count
+      step++;
+
+      // Continue animating until we reach the final step
+      if (step < steps) {
+        requestAnimationFrame(frame);
+      } else {
+        this.element.classList.add('zoomed');
+      }
+    };
+
+    // Start the animation
+    requestAnimationFrame(frame);
+  }
+}