drop files to import

src/component/alert/index.css

@@ -3,7 +3,6 @@
 }
 
 :root {
-  --alert-text: var(--theme-primary-text-020);
   --alert-header-background: var(--theme-primary-030);
   --alert-body-background: var(--theme-primary-020);
 }

src/component/base/base/index.css

@@ -120,3 +120,8 @@ html.is-theme-background-type-color,
   justify-content: flex-end;
   align-items: flex-end;
 }
+
+.drop {
+  padding: 3em;
+  border: 1px solid hsl(var(--theme-primary-060));
+}

src/component/data/index.js

@@ -32,18 +32,41 @@ data.import = {
     };
 
   },
-  file: (input, feedback) => {
+  file: ({
-
+    fileList = false,
-    const fileList = input.files;
+    feedback = false,
+    input = false
+  } = {}) => {
 
     if (fileList.length > 0) {
-      data.validateFile(fileList, input, feedback);
+      data.validateFile({
+        fileList: fileList,
+        feedback: feedback,
+        input: input
+      });
+    };
+
+  },
+  drop: ({
+    fileList = false,
+    feedback = false
+  }) => {
+
+    if (fileList.length > 0) {
+      data.validateFile({
+        fileList: fileList,
+        feedback: feedback
+      });
     };
 
   }
 };
 
-data.validateFile = (fileList, input, feedback) => {
+data.validateFile = ({
+  fileList = false,
+  feedback = false,
+  input = false
+} = {}) => {
 
   // make new file reader
   var reader = new FileReader();
@@ -116,26 +139,44 @@ data.validateFile = (fileList, input, feedback) => {
 
         data.feedback.success.render(feedback, fileList[0].name, validFileSuccessAction);
 
-        input.value = '';
+        if (input) {
 
-      } else {
-
-        data.feedback.clear.render(feedback);
-        data.feedback.fail.notAppJson.render(feedback, fileList[0].name);
           input.value = '';
 
         };
+
+      } else {
+
+        data.feedback.clear.render(feedback);
+
+        data.feedback.fail.notAppJson.render(feedback, fileList[0].name);
+
+        if (input) {
+
+          input.value = '';
+
+        };
+
+      };
+
     } else {
 
       // not a JSON file
+
       data.feedback.clear.render(feedback);
+
       data.feedback.fail.notJson.render(feedback, fileList[0].name);
+
+      if (input) {
+
         input.value = '';
 
       };
 
     };
 
+  };
+
   // invoke the reader
   reader.readAsText(fileList.item(0));
 

src/component/dropFile/index.css

@@ -0,0 +1,33 @@
+:root {
+  --drop-file-space: 24;
+}
+
+:root {
+  --drop-file-background: var(--theme-primary-030);
+  --drop-file-border: var(--theme-primary-030);
+  --drop-file-border-focus-hover: var(--theme-accent);
+}
+
+.drop-file {
+  border-width: calc(var(--layout-line-width) * 2);
+  border-style: solid;
+  border-color: hsl(var(--drop-file-border));
+  border-radius: calc(var(--theme-radius) * 0.01em);
+  padding: calc(((var(--alert-space) * 2) / 4) * 1em) calc((var(--alert-space) / 4) * 1em);
+  width: 100%;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 1em;
+  transform: scale(1);
+  transition: background-color var(--layout-transition-extra-fast), border var(--layout-transition-extra-fast), transform var(--layout-transition-extra-fast);
+}
+
+.drop-file-heading {}
+
+.drop-file-over {
+  background: hsl(var(--drop-file-background));
+  border-color: rgb(var(--drop-file-border-focus-hover));
+  transform: scale(1.05);
+}

src/component/dropFile/index.js

@@ -0,0 +1,100 @@
+import { state } from '../state';
+import { data } from '../data';
+
+import * as form from '../form';
+
+import { node } from '../../utility/node';
+import { complexNode } from '../../utility/complexNode';
+
+import './index.css';
+
+export const DropFile = function({
+  heading = 'Drop file here',
+  dropAaction = false,
+  enterAction = false,
+  leaveAction = false,
+  children = []
+} = {}) {
+
+  this.files = false;
+
+  this.element = {
+    drop: node('div|class:drop-file', children),
+    heading: node(`p:${heading}|class:drop-file-heading small`)
+  };
+
+  this.assemble = () => {
+
+    this.element.drop.appendChild(this.element.heading);
+
+  };
+
+  this.bind = () => {
+
+    this.element.drop.addEventListener('dragenter', (event) => {
+
+      event.stopPropagation();
+      event.preventDefault();
+
+      if (enterAction) {
+        enterAction();
+      };
+
+    });
+
+    this.element.drop.addEventListener('dragleave', (event) => {
+
+      event.stopPropagation();
+      event.preventDefault();
+
+      this.element.drop.classList.remove('drop-file-over');
+
+      if (leaveAction) {
+        leaveAction();
+      };
+
+    });
+
+    this.element.drop.addEventListener('dragover', (event) => {
+
+      event.stopPropagation();
+      event.preventDefault();
+
+      this.element.drop.classList.add('drop-file-over');
+
+    });
+
+    this.element.drop.addEventListener('drop', (event) => {
+
+      event.stopPropagation();
+      event.preventDefault();
+
+      this.element.drop.classList.remove('drop-file-over');
+
+      this.files = event.dataTransfer.files;
+
+      if (dropAaction) {
+        dropAaction();
+      };
+
+    });
+
+  };
+
+  this.drop = () => {
+    return this.element.drop;
+  };
+
+  this.wrap = () => {
+    return form.wrap({
+      children: [
+        this.element.drop
+      ]
+    })
+  };
+
+  this.assemble();
+
+  this.bind();
+
+};

src/component/menuContent/dataSetting/index.js

@@ -18,6 +18,7 @@ import { Button } from '../../button';
 import { Collapse } from '../../collapse';
 import { Edge } from '../../edge';
 import { Alert } from '../../alert';
+import { DropFile } from '../../dropFile';
 
 import { Control_helperText } from '../../control/helperText';
 import { Control_inputButton } from '../../control/inputButton';
@@ -50,10 +51,6 @@ dataSetting.control = {
 
 dataSetting.restore = (parent) => {
 
-  const restoreFeedback = form.feedback();
-
-  data.feedback.empty.render(restoreFeedback);
-
   dataSetting.control.restore.restoreElement = new Control_inputButton({
     id: 'restore-data',
     type: 'file',
@@ -61,7 +58,11 @@ dataSetting.restore = (parent) => {
     labelText: 'Import data',
     inputButtonStyle: ['line'],
     action: () => {
-      data.import.file(dataSetting.control.restore.restoreElement.input, restoreFeedback)
+      data.import.file({
+        fileList: dataSetting.control.restore.restoreElement.input.files,
+        feedback: dataSetting.control.restore.feedback,
+        input: dataSetting.control.restore.restoreElement
+      });
     }
   });
 
@@ -69,15 +70,32 @@ dataSetting.restore = (parent) => {
     text: ['Restore a previously exported ' + appName + ' backup.']
   });
 
+  dataSetting.control.restore.feedback = form.feedback();
+
+  data.feedback.empty.render(dataSetting.control.restore.feedback);
+
+  dataSetting.control.restore.drop = new DropFile({
+    heading: 'Or drop a ' + appName + ' backup file here.',
+    dropAaction: () => {
+      data.import.drop({
+        fileList: dataSetting.control.restore.drop.files,
+        feedback: dataSetting.control.restore.feedback,
+      });
+    },
+    children: [
+      dataSetting.control.restore.restoreElement.button
+    ]
+  });
+
   parent.appendChild(
     node('div', [
-      dataSetting.control.restore.restoreElement.wrap(),
+      dataSetting.control.restore.drop.wrap(),
-      dataSetting.control.restore.restoreHelper.wrap(),
       form.wrap({
         children: [
-          restoreFeedback
+          dataSetting.control.restore.feedback
         ]
-      })
+      }),
+      dataSetting.control.restore.restoreHelper.wrap()
     ])
   );