Add Softkey UIState to Viewer

tools/viewer/sk_app/CommandSet.cpp

 /*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #include "CommandSet.h"
 
 #include "SkCanvas.h"
@@ skipping 53 matching lines @@
     for (Command& cmd : fCommands) {
         if (Command::kChar_CommandType == cmd.fType && c == cmd.fChar) {
             cmd.fFunction();
             return true;
         }
     }
 
     return false;
 }
 
+bool CommandSet::onSoftkey(const SkString& softkey) {
+    for (const Command& cmd : fCommands) {
+        if (cmd.getSoftkeyString().equals(softkey)) {
+            cmd.fFunction();
+            return true;
+        }
+    }
+    return false;
+}
+
 void CommandSet::addCommand(SkUnichar c, const char* group, const char* description,
                             std::function<void(void)> function) {
     fCommands.push_back(Command(c, group, description, function));
 }
 
 void CommandSet::addCommand(Window::Key k, const char* keyName, const char* group,
                             const char* description, std::function<void(void)> function) {
     fCommands.push_back(Command(k, keyName, group, description, function));
 }
 
@@ skipping 63 matching lines @@
             lastGroup = cmd.fGroup;
         }
 
         canvas->drawText(cmd.fKeyName.c_str(), cmd.fKeyName.size(), x, y, paint);
         SkString text = SkStringPrintf(": %s", cmd.fDescription.c_str());
         canvas->drawText(text.c_str(), text.size(), x + keyWidth, y, paint);
         y += paint.getTextSize() + 2;
     }
 }
 
+std::vector<SkString> CommandSet::getCommandsAsSoftkeys() const {
+    std::vector<SkString> result;
+    for(const Command& command : fCommands) {
+        result.push_back(command.getSoftkeyString());
+    }
+    return result;
+}
+
 }   // namespace sk_app