Improve Chatterino extension positioning (#1825)

This adds support for left-side chat

src/singletons/NativeMessaging.cpp

@@ -198,11 +198,12 @@ void NativeMessagingServer::ReceiverThread::handleMessage(
         AttachedWindow::GetArgs args;
         args.winId = root.value("winId").toString();
         args.yOffset = root.value("yOffset").toInt(-1);
+        args.x = root.value("size").toObject().value("x").toInt(-1);
         args.width = root.value("size").toObject().value("width").toInt(-1);
         args.height = root.value("size").toObject().value("height").toInt(-1);
         args.fullscreen = attachFullscreen;
 
-        qDebug() << args.width << args.height << args.winId;
+        qDebug() << args.x << args.width << args.height << args.winId;
 
         if (_type.isNull() || args.winId.isNull())
         {

src/widgets/AttachedWindow.cpp

@@ -91,6 +91,8 @@ AttachedWindow *AttachedWindow::get(void *target, const GetArgs &args)
 
     window->fullscreen_ = args.fullscreen;
 
+    window->x_ = args.x;
+
     if (args.height != -1)
     {
         if (args.height == 0)
@@ -269,10 +271,21 @@ void AttachedWindow::updateWindowRect(void *_attachedPtr)
         // offset
         int o = this->fullscreen_ ? 0 : 8;
 
-        ::MoveWindow(hwnd, int(rect.right - this->width_ * scale - o),
+        if (this->x_ != -1)
-                     int(rect.bottom - this->height_ * scale - o),
+        {
-                     int(this->width_ * scale), int(this->height_ * scale),
+            ::MoveWindow(hwnd, int(rect.left + this->x_ * scale + o),
-                     true);
+                         int(rect.bottom - this->height_ * scale - o),
+                         int(this->width_ * scale), int(this->height_ * scale),
+                         true);
+        }
+        //support for old extension version 1.2
+        else
+        {
+            ::MoveWindow(hwnd, int(rect.right - this->width_ * scale - o),
+                         int(rect.bottom - this->height_ * scale - o),
+                         int(this->width_ * scale), int(this->height_ * scale),
+                         true);
+        }
     }
 
 //    if (this->fullscreen_)

src/widgets/AttachedWindow.hpp

@@ -17,6 +17,7 @@ public:
     struct GetArgs {
         QString winId;
         int yOffset = -1;
+        int x = -1;
         int width = -1;
         int height = -1;
         bool fullscreen = false;
@@ -53,6 +54,7 @@ private:
     void *target_;
     int yOffset_;
     int currentYOffset_;
+    int x_ = -1;
     int width_ = 360;
     int height_ = -1;
     bool fullscreen_ = false;