first commit

media/plg_media-action_crop/js/crop.js

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+import Cropper from 'cropper-module';
+
+/**
+ * @copyright  (C) 2018 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license    GNU General Public License version 2 or later; see LICENSE.txt
+ */
+let formElements;
+let activated = false;
+let instance;
+const addListeners = () => {
+  formElements.cropX.addEventListener('change', ({
+    currentTarget
+  }) => {
+    instance.setData({
+      x: parseInt(currentTarget.value, 10)
+    });
+  });
+  formElements.cropY.addEventListener('change', ({
+    currentTarget
+  }) => {
+    instance.setData({
+      y: parseInt(currentTarget.value, 10)
+    });
+  });
+  formElements.cropWidth.addEventListener('change', ({
+    currentTarget
+  }) => {
+    instance.setData({
+      width: parseInt(currentTarget.value, 10)
+    });
+  });
+  formElements.cropHeight.addEventListener('change', ({
+    currentTarget
+  }) => {
+    instance.setData({
+      height: parseInt(currentTarget.value, 10)
+    });
+  });
+  formElements.aspectRatio.addEventListener('change', ({
+    currentTarget
+  }) => {
+    instance.setAspectRatio(currentTarget.value);
+  });
+  activated = true;
+};
+const init = image => {
+  // Set default aspect ratio after numeric check, option has a dummy value
+  const defaultCropFactor = image.naturalWidth / image.naturalHeight;
+  if (!Number.isNaN(defaultCropFactor) && Number.isFinite(defaultCropFactor)) {
+    formElements.cropAspectRatioOption.value = defaultCropFactor;
+  }
+
+  // Initiate the cropper
+  instance = new Cropper(image, {
+    viewMode: 1,
+    responsive: true,
+    restore: true,
+    autoCrop: true,
+    movable: false,
+    zoomable: false,
+    rotatable: false,
+    autoCropArea: 1,
+    // scalable: false,
+    crop(e) {
+      formElements.cropX.value = Math.round(e.detail.x);
+      formElements.cropY.value = Math.round(e.detail.y);
+      formElements.cropWidth.value = Math.round(e.detail.width);
+      formElements.cropHeight.value = Math.round(e.detail.height);
+      const format = Joomla.MediaManager.Edit.original.extension === 'jpg' ? 'jpeg' : Joomla.MediaManager.Edit.original.extension;
+      const quality = formElements.cropQuality.value;
+
+      // Update the store
+      Joomla.MediaManager.Edit.current.contents = this.cropper.getCroppedCanvas().toDataURL(`image/${format}`, quality);
+
+      // Notify the app that a change has been made
+      window.dispatchEvent(new Event('mediaManager.history.point'));
+    }
+  });
+
+  // Add listeners
+  if (!activated) {
+    addListeners();
+  }
+  instance.setAspectRatio(formElements.cropAspectRatioOption.value);
+};
+
+// Register the Events
+window.addEventListener('media-manager-edit-init', () => {
+  formElements = {
+    aspectRatio: document.getElementById('jform_aspectRatio'),
+    cropHeight: document.getElementById('jform_crop_height'),
+    cropWidth: document.getElementById('jform_crop_width'),
+    cropY: document.getElementById('jform_crop_y'),
+    cropX: document.getElementById('jform_crop_x'),
+    cropQuality: document.getElementById('jform_crop_quality'),
+    cropAspectRatioOption: document.querySelector('.crop-aspect-ratio-option')
+  };
+  Joomla.MediaManager.Edit.plugins.crop = {
+    Activate(image) {
+      return new Promise((resolve /* , reject */) => {
+        init(image);
+        resolve();
+      });
+    },
+    Deactivate(image) {
+      return new Promise((resolve /* , reject */) => {
+        if (image.cropper) {
+          image.cropper.destroy();
+          instance = null;
+        }
+        resolve();
+      });
+    }
+  };
+}, {
+  once: true
+});