* Context menu items to copy and paste for drag and drop actions

Copy action is enabled when there are drag actions defined.
Paste action is enabled when there are drop actions defined that match the clipboard context.
Current clipboard contents can be seen in the tooltip for the paste action.

phpgwapi/js/egw_action/egw_action_popup.js

@@ -536,6 +536,9 @@ function egwPopupActionImplementation()
 		// Build a tree containing all actions
 		var tree = {"root": []};
 
+		// Automatically add in Drag & Drop actions
+		this._addCopyPaste(_links,_selected);
+
 		for (var k in _links)
 		{
 			_links[k].actionObj.appendToTree(tree);
@@ -572,6 +575,157 @@ function egwPopupActionImplementation()
 		return {'posx': (event.clientX + scrollLeft), 'posy': (event.clientY + scrollTop)};
 	};
 
+	/**
+	 * Automagically add in context menu items for copy and paste from
+	 * drag and drop actions, based on current clipboard and the accepted types
+	 *
+	 * @param {object[]} _links Actions for inclusion in the menu
+	 * @param {egwActionObject[]} _selected Currently selected entries
+	 */
+	ai._addCopyPaste = function (_links, _selected)
+	{
+		// Get a list of drag & drop actions
+		var drag = _selected[0].getSelectedLinks('drag').links;
+		var drop = _selected[0].getSelectedLinks('drop').links;
+
+		// No drags & no drops means early exit
+		if((!drag || jQuery.isEmptyObject(drag)) && (!drop || jQuery.isEmptyObject(drop)))
+		{
+			return;
+		}
+
+		// Find existing actions so we don't get copies
+		var mgr = _selected[0].manager;
+		var copy_action = mgr.getActionById('egw_copy');
+		var paste_action = mgr.getActionById('egw_paste');
+
+		// Create default copy menu action
+		if(drag && !jQuery.isEmptyObject(drag))
+		{
+			// Don't re-add if it's there
+			if(copy_action == null)
+			{
+				// Create a drag action that allows linking
+				copy_action = mgr.addAction('popup', 'egw_copy', egw.lang('Copy to clipboard'), egw.image('copy'), function(action, selected) {
+					// Copied, now add to clipboard
+					var clipboard = {
+						type:[],
+						selected:[]
+					}
+
+					// When pasting we need to know the type of drag
+					for(var k in drag)
+					{
+						if(drag[k].enabled && drag[k].actionObj.dragType.length > 0)
+						{
+							clipboard.type = clipboard.type.concat(drag[k].actionObj.dragType);
+						}
+					}
+					// egwAction is a circular structure and can't be stringified so just take what we want
+					// Hopefully that's enough for the action handlers
+					for(var k in selected)
+					{
+						if(selected[k].id) clipboard.selected.push({id:selected[k].id, data:selected[k].data})
+					}
+
+					// Save it in session
+					egw.setSessionItem('phpgwapi', 'egw_clipboard', JSON.stringify(clipboard));
+				},true);
+				copy_action.group = 1.5;
+			}
+			if(typeof _links[copy_action.id] == 'undefined')
+			{
+				_links[copy_action.id] = {
+					"actionObj": copy_action,
+					"enabled": true,
+					"visible": true,
+					"cnt": 0
+				};
+			}
+		}
+
+		// Create default paste menu item
+		if(drop && !jQuery.isEmptyObject(drop))
+		{
+			// Create paste action
+			// This injects the clipboard data and calls the original handler
+			var paste_exec = function(action, selected) {
+				// Add in clipboard as a sender
+				var clipboard = JSON.parse(egw.getSessionItem('phpgwapi', 'egw_clipboard'));
+				drop[action.id].actionObj.execute(clipboard.selected,selected[0]);
+			};
+
+			var clipboard = JSON.parse(egw.getSessionItem('phpgwapi', 'egw_clipboard'));
+
+			// Don't re-add if action already exists
+			if(paste_action == null)
+			{
+				paste_action = mgr.addAction('popup', 'egw_paste', egw.lang('Paste'), egw.image('editpaste'), paste_exec,true);
+				paste_action.group = 1.5;
+				paste_action.canHaveChildren.push('drop');
+			}
+
+			// Set hint to something resembling current clipboard
+			var hint = egw.lang('Clipboard') + ":\n[" + clipboard.type.join(',')+"]\n";
+			paste_action.set_hint(hint);
+			// Add titles of entries
+			for(var i = 0; i < clipboard.selected.length; i++)
+			{
+				var id = clipboard.selected[i].id.split('::');
+				egw.link_title(id[0],id[1],function(title) {if(title)this.hint += title+"\n";},paste_action);
+			}
+
+			// Add into links so it's included in menu
+			if(typeof _links[paste_action.id] == 'undefined')
+			{
+				_links[paste_action.id] = {
+					"actionObj": paste_action,
+					"enabled": false,
+					"visible": clipboard != null,
+					"cnt": 0
+				};
+			}
+			while(paste_action.children.length > 0)
+			{
+				paste_action.children[0].remove();
+			}
+
+			// If nothing [valid] in the clipboard, don't bother with children
+			if(clipboard == null || typeof clipboard.type != 'object')
+			{
+				return;
+			}
+
+			// Add in actual actions as children
+			for(var k in drop)
+			{
+				// Add some choices - need to be a copy, or they interfere with
+				// the original
+				var drop_clone = jQuery.extend({},drop[k].actionObj);
+				drop_clone.parent = paste_action;
+				drop_clone.onExecute = new egwFnct(this, null, []);
+				drop_clone.set_onExecute(paste_exec);
+				paste_action.children.push(drop_clone);
+				paste_action.allowOnMultiple = paste_action.allowOnMultiple && drop_clone.allowOnMultiple;
+				_links[k] = jQuery.extend({},drop[k]);
+				_links[k].actionObj = drop_clone;
+
+				// Drop is allowed if clipboard types intersect drop types
+				_links[k].enabled = false;
+				_links[k].visible = false;
+				for (var i = 0; i < drop_clone.acceptedTypes.length; i++)
+				{
+					if (clipboard.type.indexOf(drop_clone.acceptedTypes[i]) != -1)
+					{
+						_links[paste_action.id].enabled = true;
+						_links[k].enabled = true;
+						_links[k].visible = true;
+						break;
+					}
+				}
+			}
+		}
+	};
 	return ai;
 }