jscode enhance

logseq · Sep 26, 2021 · 01eb908 · 01eb908
1 parent 40a5cec
commit 01eb908
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Showing 3 changed files with 122 additions and 106 deletions.
diff --git a/src/main/frontend/exif.js b/src/main/frontend/exif.js
@@ -1,41 +1,41 @@
 // copied from https://stackoverflow.com/questions/7584794/accessing-jpeg-exif-rotation-data-in-javascript-on-the-client-side
 
-function objectURLToBlob(url, callback) {
-  var http = new XMLHttpRequest();
+const objectURLToBlob=(url, callback)=> {
+  const http = new XMLHttpRequest();
   http.open("GET", url, true);
   http.responseType = "blob";
-  http.onload = function(e) {
-    if (this.status == 200 || this.status === 0) {
-      callback(this.response);
+  http.onload = (e)=> {
+    if (http.status == 200 || http.status === 0) {
+      callback(http.response);
     }
   };
   http.send();
 }
 
-export var getEXIFOrientation = function (img, callback) {
-  var reader = new FileReader();
+export const getEXIFOrientation =  (img, callback)=> {
+  const reader = new FileReader();
   reader.onload = e => {
-    var view = new DataView(e.target.result)
+    const view = new DataView(e.target.result)
 
     if (view.getUint16(0, false) !== 0xFFD8) {
       return callback(-2)
     }
-    var length = view.byteLength
-    var offset = 2
+    const length = view.byteLength
+    let offset = 2
     while (offset < length) {
-      var marker = view.getUint16(offset, false)
+      const marker = view.getUint16(offset, false)
       offset += 2
       if (marker === 0xFFE1) {
         if (view.getUint32(offset += 2, false) !== 0x45786966) {
           return callback(-1)
         }
-        var little = view.getUint16(offset += 6, false) === 0x4949
+        const little = view.getUint16(offset += 6, false) === 0x4949
         offset += view.getUint32(offset + 4, little)
-        var tags = view.getUint16(offset, little)
+        const tags = view.getUint16(offset, little)
         offset += 2
-        for (var i = 0; i < tags; i++) {
+        for (let i = 0; i < tags; i++) {
           if (view.getUint16(offset + (i * 12), little) === 0x0112) {
-            var o = view.getUint16(offset + (i * 12) + 8, little);
+            const o = view.getUint16(offset + (i * 12) + 8, little);
             return callback(o)
           }
         }
@@ -48,7 +48,7 @@ export var getEXIFOrientation = function (img, callback) {
     return callback(-1)
   };
 
-  objectURLToBlob(img.src, function (blob) {
+  objectURLToBlob(img.src,  (blob)=> {
     reader.readAsArrayBuffer(blob.slice(0, 65536));
   });
 }
diff --git a/src/main/frontend/selection.js b/src/main/frontend/selection.js
@@ -1,7 +1,7 @@
 // Copied from https://stackoverflow.com/a/20336116
-function isDescendant(parent, child) {
+const isDescendant=(parent, child)=> {
      // from http://stackoverflow.com/questions/2234979/how-to-check-in-javascript-if-one-element-is-a-child-of-another
-     var node = child;
+     let node = child;
      while (node != null) {
          if (node == parent) {
              return true;
@@ -11,10 +11,10 @@ function isDescendant(parent, child) {
      return false;
 }
 
-function getNodesBetween(rootNode, node1, node2) {
-  var resultNodes = [];
-  var isBetweenNodes = false;
-  for (var i = 0; i < rootNode.childNodes.length; i+= 1) {
+const getNodesBetween=(rootNode, node1, node2)=> {
+  const resultNodes = [];
+  let isBetweenNodes = false;
+  for (let i = 0; i < rootNode.childNodes.length; i+= 1) {
     if (isDescendant(rootNode.childNodes[i], node1) || isDescendant(rootNode.childNodes[i], node2)) {
       if (resultNodes.length == 0) {
         isBetweenNodes = true;
@@ -39,9 +39,9 @@ function getNodesBetween(rootNode, node1, node2) {
   }
 }
 
-export var getSelectedNodes = function (selectionAncestor, startNode) {
+export const getSelectedNodes =  (selectionAncestor, startNode)=> {
   // from https://developer.mozilla.org/en-US/docs/Web/API/Selection
-  var selection = null;
+  let selection = null;
   if(window.getSelection){
     selection = window.getSelection();
   } else if(document.selection){
@@ -52,13 +52,13 @@ export var getSelectedNodes = function (selectionAncestor, startNode) {
     if (selection.isCollapsed) {
       return [];
     };
-    var node2 = selection.focusNode;
+    const node2 = selection.focusNode;
     return getNodesBetween(selectionAncestor, startNode, node2);
   }
 };
 
-export var clearSelection = function () {
-  var selection = null;
+export const clearSelection =  ()=> {
+  let selection = null;
   if(window.getSelection){
     selection = window.getSelection();
   } else if(document.selection){