drag and drop image from browser

browser/main/lib/dataApi/attachmentManagement.js

@@ -18,7 +18,14 @@ const PATH_SEPARATORS = escapeStringRegexp(path.posix.sep) + escapeStringRegexp(
  * @returns {Promise<Image>} Image element created
  */
 function getImage (file) {
-  return new Promise((resolve) => {
+  if (_.isString(file)) {
+    return new Promise(resolve => {
+      const img = new Image()
+      img.onload = () => resolve(img)
+      img.src = file
+    })
+  } else {
+    return new Promise(resolve => {
       const reader = new FileReader()
       const img = new Image()
       img.onload = () => resolve(img)
@@ -27,6 +34,7 @@ function getImage (file) {
       }
       reader.readAsDataURL(file)
     })
+  }
 }
 
 /**
@@ -253,6 +261,7 @@ function generateAttachmentMarkdown (fileName, path, showPreview) {
  * @param {Event} dropEvent DropEvent
  */
 function handleAttachmentDrop (codeEditor, storageKey, noteKey, dropEvent) {
+  if (dropEvent.dataTransfer.files.length > 0) {
     const file = dropEvent.dataTransfer.files[0]
     const filePath = file.path
     const originalFileName = path.basename(filePath)
@@ -260,6 +269,7 @@ function handleAttachmentDrop (codeEditor, storageKey, noteKey, dropEvent) {
     const isImage = fileType.startsWith('image')
     let promise
     if (isImage) {
+      console.log(file)
       promise = fixRotate(file).then(base64data => {
         return copyAttachment({type: 'base64', data: base64data, sourceFilePath: filePath}, storageKey, noteKey)
       })
@@ -270,6 +280,38 @@ function handleAttachmentDrop (codeEditor, storageKey, noteKey, dropEvent) {
       const imageMd = generateAttachmentMarkdown(originalFileName, path.join(STORAGE_FOLDER_PLACEHOLDER, noteKey, fileName), isImage)
       codeEditor.insertAttachmentMd(imageMd)
     })
+  } else {
+    for (let i = 0; i < dropEvent.dataTransfer.items.length; i++) {
+      const item = dropEvent.dataTransfer.items[i]
+
+      if (item.type === 'text/html') {
+        const html = dropEvent.dataTransfer.getData('text/html')
+
+        const match = /<img[^>]*src="([^"]+)"/.exec(html)
+        if (match) {
+          const imageURL = match[1]
+
+          getImage(imageURL)
+            .then(image => {
+              const canvas = document.createElement('canvas')
+              const context = canvas.getContext('2d')
+              canvas.width = image.width
+              canvas.height = image.height
+              context.drawImage(image, 0, 0)
+
+              return copyAttachment({type: 'base64', data: canvas.toDataURL(), sourceFilePath: imageURL}, storageKey, noteKey)
+            })
+            .then(fileName => {
+              const imageMd = generateAttachmentMarkdown(imageURL, path.join(STORAGE_FOLDER_PLACEHOLDER, noteKey, fileName), true)
+
+              codeEditor.insertAttachmentMd(imageMd)
+            })
+
+          break
+        }
+      }
+    }
+  }
 }
 
 /**