svgedit/editor/contextmenu.js

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/**
* Package: svgedit.contextmenu
*
* Licensed under the Apache License, Version 2
*
* Author: Adam Bender
*/
// Dependencies:
// 1) jQuery (for dom injection of context menus)
var svgedit = svgedit || {};
(function() {
var self = this;
if (!svgedit.contextmenu) {
svgedit.contextmenu = {};
}
self.contextMenuExtensions = {}
var addContextMenuItem = function(menuItem) {
// menuItem: {id, label, shortcut, action}
if (!menuItemIsValid(menuItem)) {
console
.error("Menu items must be defined and have at least properties: id, label, action, where action must be a function");
return;
}
if (menuItem.id in self.contextMenuExtensions) {
console.error('Cannot add extension "' + menuItem.id
+ '", an extension by that name already exists"');
return;
}
// Register menuItem action, see below for deferred menu dom injection
console.log("Registed contextmenu item: {id:"+ menuItem.id+", label:"+menuItem.label+"}");
self.contextMenuExtensions[menuItem.id] = menuItem;
//TODO: Need to consider how to handle custom enable/disable behavior
}
var hasCustomHandler = function(handlerKey) {
return self.contextMenuExtensions[handlerKey] && true;
}
var getCustomHandler = function(handlerKey) {
return self.contextMenuExtensions[handlerKey].action;
}
var injectExtendedContextMenuItemIntoDom = function(menuItem) {
if (Object.keys(self.contextMenuExtensions).length == 0) {
// all menuItems appear at the bottom of the menu in their own container.
// if this is the first extension menu we need to add the separator.
$("#cmenu_canvas").append("<li class='separator'>");
}
var shortcut = menuItem.shortcut || "";
$("#cmenu_canvas").append("<li class='disabled'><a href='#" + menuItem.id + "'>"
+ menuItem.label + "<span class='shortcut'>"
+ shortcut + "</span></a></li>");
}
var menuItemIsValid = function(menuItem) {
return menuItem && menuItem.id && menuItem.label && menuItem.action && typeof menuItem.action == 'function';
}
// Defer injection to wait out initial menu processing. This probably goes away once all context
// menu behavior is brought here.
svgEditor.ready(function() {
for (menuItem in contextMenuExtensions) {
injectExtendedContextMenuItemIntoDom(contextMenuExtensions[menuItem]);
}
});
svgedit.contextmenu.resetCustomMenus = function(){self.contextMenuExtensions = {}}
svgedit.contextmenu.add = addContextMenuItem;
svgedit.contextmenu.hasCustomHandler = hasCustomHandler;
svgedit.contextmenu.getCustomHandler = getCustomHandler;
})();