Display thumbnails in the drive and then file picker

bower.json

@@ -42,7 +42,8 @@
     "diff-dom": "2.1.1",
     "nthen": "^0.1.5",
     "open-sans-fontface": "^1.4.2",
-    "bootstrap-tokenfield": "^0.12.1"
+    "bootstrap-tokenfield": "^0.12.1",
+    "localforage": "^1.5.2"
   },
   "resolutions": {
     "bootstrap": "v4.0.0-alpha.6"

www/common/sframe-common-interface.js

@@ -3,14 +3,19 @@ define([
     '/api/config',
     '/common/cryptpad-common.js',
     '/common/common-util.js',
+    '/common/common-hash.js',
     '/common/media-tag.js',
     '/common/tippy.min.js',
     '/customize/application_config.js',
+    '/file/file-crypto.js',
+    '/bower_components/localforage/dist/localforage.min.js',
 
+    '/bower_components/tweetnacl/nacl-fast.min.js',
     'css!/common/tippy.css',
-], function ($, Config, Cryptpad, Util, MediaTag, Tippy, AppConfig) {
+], function ($, Config, Cryptpad, Util, Hash, MediaTag, Tippy, AppConfig, FileCrypto, localForage) {
     var UI = {};
     var Messages = Cryptpad.Messages;
+    var Nacl = window.nacl;
 
     /**
      * Requirements from cryptpad-common.js
@@ -28,6 +33,40 @@ define([
      *  - createDropdown
     */
 
+    var addThumbnail = function (err, thumb, $span, cb) {
+        var img = new Image();
+        img.src = 'data:;base64,'+thumb;
+        $span.find('.cp-icon').hide();
+        $span.prepend(img);
+        cb($(img));
+    };
+    UI.displayThumbnail = function (href, $container, cb) {
+        cb = cb || $.noop;
+        var parsed = Hash.parsePadUrl(href);
+        if (parsed.type !== 'file') { return; }
+        var k  ='thumbnail-' + href;
+        var whenNewThumb = function () {
+            var secret = Hash.getSecrets('file', parsed.hash);
+            var hexFileName = Util.base64ToHex(secret.channel);
+            var src = Hash.getBlobPathFromHex(hexFileName);
+            var cryptKey = secret.keys && secret.keys.fileKeyStr;
+            var key = Nacl.util.decodeBase64(cryptKey);
+            FileCrypto.fetchDecryptedMetadata(src, key, function (e, metadata) {
+                if (!metadata.thumbnail) {
+                    return void localForage.setItem(k, 'EMPTY');
+                }
+                localForage.setItem(k, metadata.thumbnail, function (err) {
+                    addThumbnail(err, metadata.thumbnail, $container, cb);
+                });
+            });
+        };
+        localForage.getItem(k, function (err, v) {
+            if (!v) { return void whenNewThumb(); }
+            if (v === 'EMPTY') { return; }
+            addThumbnail(err, v, $container, cb);
+        });
+    };
+
     UI.updateTags = function (common, href) {
         var sframeChan = common.getSframeChannel();
         sframeChan.query('Q_TAGS_GET', href || null, function (err, res) {
@@ -92,7 +131,7 @@ define([
                         target: data.target
                     };
                     if (data.filter && !data.filter(file)) {
-                        Cryptpad.log('TODO: invalid avatar (type or size)');
+                        Cryptpad.log('Invalid avatar (type or size)');
                         return;
                     }
                     data.FM.handleFile(file, ev);
@@ -398,9 +437,6 @@ define([
         }, LIMIT_REFRESH_RATE * 3);
 
         updateUsage();
-        /*getProxy().on('change', ['drive'], function () {
-            updateUsage();
-        }); TODO*/
         cb(null, $container);
     };
 

www/common/sframe-common.js

@@ -80,6 +80,7 @@ define([
     funcs.createButton = callWithCommon(UI.createButton);
     funcs.createUsageBar = callWithCommon(UI.createUsageBar);
     funcs.updateTags = callWithCommon(UI.updateTags);
+    funcs.displayThumbnail = UI.displayThumbnail;
 
     // History
     funcs.getHistory = callWithCommon(History.create);

www/drive/app-drive.less

@@ -51,6 +51,7 @@ min-height: auto;
         text-overflow: ellipsis;
         padding-top: 5px;
         padding-bottom: 5px;
+        border: 1px solid transparent;
 
         &:not(.cp-app-drive-element-selected):not(.cp-app-drive-element-selected-tmp) {
             border: 1px solid #CCC;
@@ -516,6 +517,13 @@ span {
                     font-size: 18px;
                 }
             }
+            .cp-app-drive-element-thumbnail {
+                max-width: 64px;
+                max-height: 64px;
+                & ~ .fa {
+                    display: none;
+                }
+            }
         }
         .cp-app-drive-element-list {
             display: none;

www/drive/inner.js

@@ -1159,11 +1159,16 @@ define([
 
             // The element with the class '.name' is underlined when the 'li' is hovered
             var $name = $('<span>', {'class': 'cp-app-drive-element-name'}).text(name);
-            $span.html('');
             $span.append($name);
             $span.append($state);
 
             var type = Messages.type[hrefData.type] || hrefData.type;
+            common.displayThumbnail(data.href, $span, function ($thumb) {
+                // Called only if the thumbnail exists
+                $span.find('.cp-icon').addClass('cp-app-drive-element-list');
+                $thumb.addClass('cp-app-drive-element-grid')
+                    .addClass('cp-app-drive-element-thumbnail');
+            });
             var $type = $('<span>', {
                 'class': 'cp-app-drive-element-type cp-app-drive-element-list'
             }).text(type);
@@ -1181,7 +1186,6 @@ define([
 
         var addFolderData = function (element, key, $span) {
             if (!element || !filesOp.isFolder(element)) { return; }
-            $span.html('');
             // The element with the class '.name' is underlined when the 'li' is hovered
             var sf = filesOp.hasSubfolder(element);
             var files = filesOp.hasFile(element);
@@ -1239,11 +1243,6 @@ define([
                     APP.selectedFiles.splice(idx, 1);
                 }
             }
-            if (isFolder) {
-                addFolderData(element, key, $element);
-            } else {
-                addFileData(element, $element);
-            }
             $element.prepend($icon).dblclick(function () {
                 if (isFolder) {
                     APP.displayDirectory(newPath);
@@ -1252,6 +1251,11 @@ define([
                 if (isTrash) { return; }
                 openFile(root[key]);
             });
+            if (isFolder) {
+                addFolderData(element, key, $element);
+            } else {
+                addFileData(element, $element);
+            }
             $element.addClass(liClass);
             $element.data('path', newPath);
             addDragAndDropHandlers($element, newPath, isFolder, !isTrash);
@@ -1850,10 +1854,10 @@ define([
                         APP.selectedFiles.splice(sidx, 1);
                     }
                 }
-                addFileData(id, $element);
                 $element.prepend($icon).dblclick(function () {
                     openFile(id);
                 });
+                addFileData(id, $element);
                 var path = [rootName, idx];
                 $element.data('path', path);
                 $element.click(function(e) {
@@ -1886,12 +1890,12 @@ define([
                 var $element = $('<li>', {
                     'class': 'cp-app-drive-element cp-app-drive-element-row' + roClass 
                 });
-                addFileData(id, $element);
-                $element.data('path', [FILES_DATA, id]);
-                $element.data('element', id);
                 $element.prepend($icon).dblclick(function () {
                     openFile(id);
                 });
+                addFileData(id, $element);
+                $element.data('path', [FILES_DATA, id]);
+                $element.data('element', id);
                 $element.click(function(e) {
                     e.stopPropagation();
                     onElementClick(e, $element);
@@ -2018,10 +2022,10 @@ define([
                 var $element = $('<li>', {
                     'class': 'cp-app-drive-element cp-app-drive-element-file cp-app-drive-element-row' + roClass,
                 });
-                addFileData(id, $element);
                 $element.prepend($icon).dblclick(function () {
                     openFile(id);
                 });
+                addFileData(id, $element);
                 $element.data('path', path);
                 $element.click(function(e) {
                     e.stopPropagation();

www/filepicker/app-filepicker.less

@@ -21,11 +21,15 @@
         .cp-filepicker-content-element {
             @darker: darken(@colortheme_modal-fg, 30%);
 
-            width: 200px;
-            min-width: 200px;
-            height: 1em;
-            padding: 0.5em;
+            width: 125px;
+            //min-width: 200px;
+            //height: 1em;
+            padding: 10px;
             margin: 5px;
+
+            display: inline-flex;
+            flex-flow: column;
+
             box-sizing: content-box;
 
             text-align: left;
@@ -41,15 +45,24 @@
                 color: @colortheme_modal-fg;
             }
 
-            overflow: hidden;
-            text-overflow: ellipsis;
-            white-space: nowrap;
-
             align-items: center;
 
+            .cp-filepicker-content-element-name {
+                overflow: hidden;
+                text-overflow: ellipsis;
+                white-space: nowrap;
+                height: 20px;
+                line-height: 20px;
+                margin-top: 5px;
+                max-width: 100%;
+            }
             .fa {
                 cursor: pointer;
-                margin-right: 0.5em;
+                width: 100px;
+                height: 100px;
+                font-size: 70px;
+                text-align: center;
+                line-height: 100px;
             }
         }
     }

www/filepicker/inner.js

@@ -114,6 +114,7 @@ define([
             }
 
             var $container = $('<span>', {'class': 'cp-filepicker-content'}).appendTo($block);
+
             // Update the files list when needed
             updateContainer = function () {
                 $container.html('');
@@ -132,10 +133,14 @@ define([
                             'title': name,
                         }).appendTo($container);
                         $span.append(Cryptpad.getFileIcon(data));
-                        $span.append(name);
+                        $('<span>', {'class': 'cp-filepicker-content-element-name'}).text(name)
+                            .appendTo($span);
                         $span.click(function () {
                             if (typeof onSelect === "function") { onSelect(data.href); }
                         });
+
+                        // Add thumbnail if it exists
+                        common.displayThumbnail(data.href, $span);
                     });
                     $input.focus();
                 };