1 files changed, 57 insertions, 0 deletions
diff --git a/lib/sugar-web/activity/shortcut.js b/lib/sugar-web/activity/shortcut.js
new file mode 100644
index 0000000..403af03
--- /dev/null
+++ b/lib/sugar-web/activity/shortcut.js
@@ -0,0 +1,57 @@
+define(function () {
+    var shortcut = {};
+
+    shortcut._allShortcuts = [];
+
+    shortcut.add = function (modifiersString, key, callback) {
+        // Parse the modifiers.  For example "Ctrl+Alt" will become
+        // {'ctrlKey': true, 'altKey': true, 'shiftKey': false}
+        var modifiersList = modifiersString.toLowerCase().split("+");
+        var modifiers = {
+            'ctrlKey': modifiersList.indexOf('ctrl') >= 0,
+            'altKey': modifiersList.indexOf('alt') >= 0,
+            'shiftKey': modifiersList.indexOf('shift') >= 0
+        };
+
+        this._allShortcuts.push({
+            'modifiers': modifiers,
+            'key': key.toLowerCase(),
+            'callback': callback
+        });
+    };
+
+    document.onkeypress = function (e) {
+        e = e || window.event;
+
+        var modifiers = {
+            'ctrlKey': e.ctrlKey,
+            'altKey': e.altKey,
+            'shiftKey': e.shiftKey
+        };
+
+        // Obtain the key
+        var charCode;
+        if (typeof e.which == "number") {
+            charCode = e.which;
+        } else {
+            charCode = e.keyCode;
+        }
+        var key = String.fromCharCode(charCode).toLowerCase();
+
+        // Search for a matching shortcut
+        for (i = 0; i < shortcut._allShortcuts.length; i += 1) {
+            var currentShortcut = shortcut._allShortcuts[i];
+
+            var match = currentShortcut.key == key &&
+                currentShortcut.modifiers.ctrlKey == modifiers.ctrlKey &&
+                currentShortcut.modifiers.altKey == modifiers.altKey &&
+                currentShortcut.modifiers.shiftKey == modifiers.shiftKey;
+            if (match) {
+                currentShortcut.callback();
+                return;
+            }
+        }
+    };
+
+    return shortcut;
+});