From 865de472336c3624e4faf502216367a4991df0c3 Mon Sep 17 00:00:00 2001
From: Julien Rebetez <julien.rebetez@heig-vd.ch>
Date: Fri, 30 Oct 2015 10:52:36 +0100
Subject: [PATCH] Add Cut/Copy/Paste Cell attachments menu items

---
 notebook/static/notebook/js/actions.js  | 21 +++++++++
 notebook/static/notebook/js/notebook.js | 63 ++++++++++++++++++++++++-
 notebook/templates/notebook.html        |  4 ++
 3 files changed, 87 insertions(+), 1 deletion(-)

diff --git a/notebook/static/notebook/js/actions.js b/notebook/static/notebook/js/actions.js
index 682c8d0da..83df33bee 100644
--- a/notebook/static/notebook/js/actions.js
+++ b/notebook/static/notebook/js/actions.js
@@ -160,6 +160,27 @@ define(function(require){
                 env.notebook.insert_image();
             }
         },
+        'cut-cell-attachments': {
+            help    : 'cut cell attachments',
+            help_index : 'dza',
+            handler: function (env) {
+                env.notebook.cut_cell_attachments();
+            }
+        },
+        'copy-cell-attachments': {
+            help    : 'copy cell attachments',
+            help_index: 'dzb',
+            handler: function (env) {
+                env.notebook.copy_cell_attachments();
+            }
+        },
+        'paste-cell-attachments': {
+            help    : 'paste cell attachments',
+            help_index: 'dzc',
+            handler: function (env) {
+                env.notebook.paste_cell_attachments();
+            }
+        },
         'split-cell-at-cursor': {
             help    : 'split cell',
             help_index : 'ea',
diff --git a/notebook/static/notebook/js/notebook.js b/notebook/static/notebook/js/notebook.js
index 1c0d80d4a..28cc30c3c 100644
--- a/notebook/static/notebook/js/notebook.js
+++ b/notebook/static/notebook/js/notebook.js
@@ -128,6 +128,7 @@ define(function (require) {
         this.clipboard = null;
         this.undelete_backup_stack = [];
         this.paste_enabled = false;
+        this.paste_attachments_enabled = false;
         this.writable = false;
         // It is important to start out in command mode to match the intial mode
         // of the KeyboardManager.
@@ -1673,7 +1674,7 @@ define(function (require) {
         this.merge_cells([index, index+1], false);
     };
 
-    // Image insertion
+    // Attachments handling
 
     /**
      * Shows a dialog letting the user pick an image from her computer and
@@ -1703,6 +1704,66 @@ define(function (require) {
         });
     };
 
+    /**
+     * Cut the attachments of a cell
+     */
+    Notebook.prototype.cut_cell_attachments = function() {
+        var cell = this.get_selected_cell();
+        this.clipboard_attachments = cell.attachments;
+        this.enable_attachments_paste();
+        cell.attachments = {};
+        cell.unrender();
+        cell.render();
+    };
+
+    /**
+     * Copy the attachments of a cell
+     */
+    Notebook.prototype.copy_cell_attachments = function() {
+        var cell = this.get_selected_cell();
+        // Do a deep copy of attachments to avoid subsequent modification
+        // to the cell to modify the clipboard
+        this.clipboard_attachments = $.extend(true, {}, cell.attachments);
+        this.enable_attachments_paste();
+        cell.unrender();
+        cell.render();
+    };
+
+    /**
+     * Paste the attachments in the clipboard into the currently selected
+     * cell
+     */
+    Notebook.prototype.paste_cell_attachments = function() {
+        if (this.clipboard_attachments !== null &&
+            this.paste_attachments_enabled) {
+            var cell = this.get_selected_cell();
+            $.extend(cell.attachments, this.clipboard_attachments);
+            cell.unrender();
+            cell.render();
+        }
+    };
+
+    /**
+     * Disable the "Paste Cell Attachments" menu item
+     */
+    Notebook.prototype.disable_attachments_paste = function () {
+        if (this.paste_attachments_enabled) {
+            $('#paste_cell_attachments').addClass('disabled');
+            this.paste_attachments_enabled = false;
+        }
+    };
+
+    /**
+     * Enable the "Paste Cell Attachments" menu item
+     */
+    Notebook.prototype.enable_attachments_paste = function () {
+        var that = this;
+        if (!this.paste_attachments_enabled) {
+            $('#paste_cell_attachments').removeClass('disabled');
+            this.paste_attachments_enabled = true;
+        }
+    };
+
     /**
      * Enable/disable the "Insert image" menu item
      */
diff --git a/notebook/templates/notebook.html b/notebook/templates/notebook.html
index efa614b2c..c14d38ab1 100644
--- a/notebook/templates/notebook.html
+++ b/notebook/templates/notebook.html
@@ -144,6 +144,10 @@ data-notebook-path="{{notebook_path | urlencode}}"
                         <li class="divider"></li>
                         <li id="find_and_replace"><a href="#"> Find and Replace </a></li>
                         <li class="divider"></li>
+                        <li id="cut_cell_attachments"><a href="#">Cut Cell Attachments</a></li>
+                        <li id="copy_cell_attachments"><a href="#">Copy Cell Attachments</a></li>
+                        <li id="paste_cell_attachments" class="disabled"><a href="#">Paste Cell Attachments</a></li>
+                        <li class="divider"></li>
                         <li id="insert_image" class="disabled"><a href="#"> Insert Image </a></li>
                     </ul>
                 </li>