obs-browser: Add Linux browser panel support

This adds browser panel support for Linux.

CMakeLists.txt

@@ -126,7 +126,7 @@ set(obs-browser_HEADERS
 
 # only allow browser panels on win32 for now -- other operating systems
 # need more testing
-if(WIN32 AND BROWSER_PANEL_SUPPORT_ENABLED)
+if(BROWSER_PANEL_SUPPORT_ENABLED)
 	list(APPEND obs-browser_SOURCES
 		panel/browser-panel.cpp
 		panel/browser-panel-client.cpp

panel/browser-panel-internal.hpp

@@ -55,6 +55,8 @@ class QCefWidgetInternal : public QCefWidget {
 	std::string script;
 	CefRefPtr<CefRequestContext> rqc;
 	QTimer timer;
+	QWindow *window = nullptr;
+	QWidget *container = nullptr;
 	bool allowAllPopups_ = false;
 
 	virtual void resizeEvent(QResizeEvent *event) override;

panel/browser-panel.cpp

@@ -16,6 +16,10 @@
 #include <util/base.h>
 #include <thread>
 
+#if !defined(_WIN32) && !defined(__APPLE__)
+#include <X11/Xlib.h>
+#endif
+
 extern bool QueueCEFTask(std::function<void()> task);
 extern "C" void obs_browser_initialize(void);
 extern os_event_t *cef_started_event;
@@ -220,8 +224,6 @@ void QCefWidgetInternal::closeBrowser()
 
 void QCefWidgetInternal::Init()
 {
-	WId id = winId();
-
 	bool success = QueueCEFTask([this, id]() {
 		CefWindowInfo windowInfo;
 
@@ -237,10 +239,11 @@ void QCefWidgetInternal::Init()
 		size *= devicePixelRatio();
 #endif
 		RECT rc = {0, 0, size.width(), size.height()};
-		windowInfo.SetAsChild((HWND)id, rc);
-#elif __APPLE__
-		windowInfo.SetAsChild((CefWindowHandle)id, 0, 0, size.width(),
-				      size.height());
+		windowInfo.SetAsChild((HWND)this->window->winId(), rc);
+#else
+		CefRect rc = {0, 0, size.width(), size.height()};
+		windowInfo.SetAsChild((CefWindowHandle)this->window->winId(),
+				      rc);
 #endif
 
 		CefRefPtr<QCefBrowserClient> browserClient =
@@ -253,9 +256,7 @@ void QCefWidgetInternal::Init()
 			CefRefPtr<CefDictionaryValue>(),
 #endif
 			rqc);
-#ifdef _WIN32
 		Resize();
-#endif
 	});
 
 	if (success)
@@ -270,7 +271,6 @@ void QCefWidgetInternal::resizeEvent(QResizeEvent *event)
 
 void QCefWidgetInternal::Resize()
 {
-#ifdef _WIN32
 #ifdef SUPPORTS_FRACTIONAL_SCALING
 	QSize size = this->size() * devicePixelRatioF();
 #elif
@@ -280,24 +280,42 @@ void QCefWidgetInternal::Resize()
 	QueueCEFTask([this, size]() {
 		if (!cefBrowser)
 			return;
+
+#ifdef _WIN32
 		HWND hwnd = cefBrowser->GetHost()->GetWindowHandle();
 		SetWindowPos(hwnd, nullptr, 0, 0, size.width(), size.height(),
 			     SWP_NOMOVE | SWP_NOOWNERZORDER | SWP_NOZORDER);
 		SendMessage(hwnd, WM_SIZE, 0,
 			    MAKELPARAM(size.width(), size.height()));
-	});
+#elif __APPLE__
+#else
+		auto id = cefBrowser->GetHost()->GetWindowHandle();
+		auto xDisplay = cef_get_xdisplay();
+		XWindowChanges changes = {};
+		changes.x = 0;
+		changes.y = 0;
+		changes.width = size.width();
+		changes.height = size.height();
+		XConfigureWindow(xDisplay, id, CWX | CWY | CWHeight | CWWidth,
+				 &changes);
 #endif
+
+		this->container->resize(size.width(), size.height());
+	});
 }
 
 void QCefWidgetInternal::showEvent(QShowEvent *event)
 {
 	QWidget::showEvent(event);
 
 	if (!cefBrowser) {
+		window = new QWindow();
 		obs_browser_initialize();
 		connect(&timer, SIGNAL(timeout()), this, SLOT(Init()));
 		timer.start(500);
 		Init();
+		container = QWidget::createWindowContainer(window, this);
+		container->show();
 	}
 }
 

panel/browser-panel.hpp

@@ -72,7 +72,8 @@ static inline QCef *obs_browser_init_panel(void)
 #ifdef _WIN32
 	void *lib = os_dlopen("obs-browser");
 #else
-	void *lib = os_dlopen("../obs-plugins/obs-browser");
+	// Need to un-hardcode this, as I couldn't get it to work otherwise
+	void *lib = os_dlopen("/usr/lib/obs-plugins/obs-browser.so");
 #endif
 	QCef *(*create_qcef)(void) = nullptr;
 
@@ -93,7 +94,7 @@ static inline int obs_browser_qcef_version(void)
 #ifdef _WIN32
 	void *lib = os_dlopen("obs-browser");
 #else
-	void *lib = os_dlopen("../obs-plugins/obs-browser");
+	void *lib = os_dlopen("/usr/lib/obs-plugins/obs-browser.so");
 #endif
 	int (*qcef_version)(void) = nullptr;