Add KeyAction::Left/RightMouseButton (it's quite experimental at the moment)

src/app/ui/document_view.cpp

@@ -38,6 +38,7 @@
 #include "raster/sprite.h"
 #include "ui/accelerator.h"
 #include "ui/message.h"
+#include "ui/system.h"
 #include "ui/view.h"
 
 namespace app {
@@ -109,6 +110,32 @@ public:
     return isKeyActionPressed(KeyAction::SubtractSelection);
   }
 
+protected:
+  bool onProcessMessage(Message* msg) override {
+    switch (msg->type()) {
+
+      case kKeyDownMessage:
+      case kKeyUpMessage:
+        if (static_cast<KeyMessage*>(msg)->repeat() == 0) {
+          Key* lmb = KeyboardShortcuts::instance()->action(KeyAction::LeftMouseButton);
+          Key* rmb = KeyboardShortcuts::instance()->action(KeyAction::RightMouseButton);
+
+          // Convert action keys into mouse messages.
+          if (lmb->isPressed(msg) || rmb->isPressed(msg)) {
+            MouseMessage mouseMsg(
+              (msg->type() == kKeyDownMessage ? kMouseDownMessage: kMouseUpMessage),
+              (lmb->isPressed(msg) ? kButtonLeft: kButtonRight),
+              gfx::Point(jmouse_x(0), jmouse_y(0)));
+
+            sendMessage(&mouseMsg);
+            return true;
+          }
+        }
+        break;
+    }
+    return Editor::onProcessMessage(msg);
+  }
+
 private:
   bool isKeyActionPressed(KeyAction action) {
     if (Key* key = KeyboardShortcuts::instance()->action(action))

src/app/ui/keyboard_shortcuts.cpp

@@ -57,6 +57,8 @@ namespace {
     { "LockAxis"            , "Lock Axis"          , app::KeyAction::LockAxis },
     { "AddSelection"        , "Add Selection"      , app::KeyAction::AddSelection },
     { "SubtractSelection"   , "Subtract Selection" , app::KeyAction::SubtractSelection },
+    { "LeftMouseButton"     , "Trigger Left Mouse Button" , app::KeyAction::LeftMouseButton },
+    { "RightMouseButton"    , "Trigger Right Mouse Button" , app::KeyAction::RightMouseButton },
     { NULL                  , NULL                 , app::KeyAction::None }
   };
 

src/app/ui/keyboard_shortcuts.h

@@ -67,6 +67,8 @@ namespace app {
     LockAxis,
     AddSelection,
     SubtractSelection,
+    LeftMouseButton,
+    RightMouseButton
   };
 
   class Key {