DevTools: Add support for showing shortcuts based on shortcuts registry and use it for pause/resume…

Source/devtools/front_end/ui/KeyboardShortcut.js

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 101 matching lines @@
     },
 };
 
 WebInspector.KeyboardShortcut.KeyBindings = {};
 
 (function() {
     for (var key in WebInspector.KeyboardShortcut.Keys) {
         var descriptor = WebInspector.KeyboardShortcut.Keys[key];
         if (typeof descriptor === "object" && descriptor["code"]) {
             var name = typeof descriptor["name"] === "string" ? descriptor["name"] : key;
-            WebInspector.KeyboardShortcut.KeyBindings[name] = { code: descriptor["code"] };
+            WebInspector.KeyboardShortcut.KeyBindings[name] = descriptor;
         }
     }
 })();
 
 /**
  * Creates a number encoding keyCode in the lower 8 bits and modifiers mask in the higher 8 bits.
  * It is useful for matching pressed keys.
  *
  * @param {number|string} keyCode The code of the key, or a character "a-z" which is converted to a keyCode value.
  * @param {number=} modifiers Optional list of modifiers passed as additional parameters.
@@ skipping 60 matching lines @@
 WebInspector.KeyboardShortcut.makeDescriptor = function(key, modifiers)
 {
     return {
         key: WebInspector.KeyboardShortcut.makeKey(typeof key === "string" ? key : key.code, modifiers),
         name: WebInspector.KeyboardShortcut.shortcutToString(key, modifiers)
     };
 }
 
 /**
  * @param {string} shortcut
- * @return {number}
+ * @return {?WebInspector.KeyboardShortcut.Descriptor}
  */
-WebInspector.KeyboardShortcut.makeKeyFromBindingShortcut = function(shortcut)
+WebInspector.KeyboardShortcut.makeDescriptorFromBindingShortcut = function(shortcut)
 {
     var parts = shortcut.split(/\+(?!$)/);
     var modifiers = 0;
+    var keyString;
     for (var i = 0; i < parts.length; ++i) {
         if (typeof WebInspector.KeyboardShortcut.Modifiers[parts[i]] !== "undefined") {
             modifiers |= WebInspector.KeyboardShortcut.Modifiers[parts[i]];
             continue;
         }
-        console.assert(i === parts.length - 1, "Modifiers-only shortcuts are not allowed (encountered <" + shortcut + ">)");
-        var key = WebInspector.KeyboardShortcut.Keys[parts[i]] || WebInspector.KeyboardShortcut.KeyBindings[parts[i]];
-        if (key && key.shiftKey)
-            modifiers |= WebInspector.KeyboardShortcut.Modifiers.Shift;
-        return WebInspector.KeyboardShortcut.makeKey(key ? key.code : parts[i].toLowerCase(), modifiers)
+        console.assert(i === parts.length - 1, "Only one key other than modifier is allowed in shortcut <" + shortcut + ">");
+        keyString = parts[i];
+        break;
     }
-    console.assert(false);
-    return 0;
+    console.assert(keyString, "Modifiers-only shortcuts are not allowed (encountered <" + shortcut + ">)");
+    if (!keyString)
+        return null;
+
+    var key = WebInspector.KeyboardShortcut.Keys[keyString] || WebInspector.KeyboardShortcut.KeyBindings[keyString];
+    if (key && key.shiftKey)
+        modifiers |= WebInspector.KeyboardShortcut.Modifiers.Shift;
+    return WebInspector.KeyboardShortcut.makeDescriptor(key ? key : keyString, modifiers);
 }
 
 /**
  * @param {string|!WebInspector.KeyboardShortcut.Key} key
  * @param {number=} modifiers
  * @return {string}
  */
 WebInspector.KeyboardShortcut.shortcutToString = function(key, modifiers)
 {
     return WebInspector.KeyboardShortcut._modifiersToString(modifiers) + WebInspector.KeyboardShortcut._keyName(key);
@@ skipping 50 matching lines @@
         res += isMac ? optKey : "Alt + ";
     if (modifiers & WebInspector.KeyboardShortcut.Modifiers.Shift)
         res += isMac ? shiftKey : "Shift + ";
     if (modifiers & WebInspector.KeyboardShortcut.Modifiers.Meta)
         res += isMac ? cmdKey : "Win + ";
 
     return res;
 };
 
 WebInspector.KeyboardShortcut.SelectAll = WebInspector.KeyboardShortcut.makeKey("a", WebInspector.KeyboardShortcut.Modifiers.CtrlOrMeta);