// Copyright (c) 2016 CEF Python, see the Authors file.
// All rights reserved. Licensed under BSD 3-clause license.
// Project website: https://github.com/cztomczak/cefpython

// NOTE: This file is also used by "subprocess" and "libcefpythonapp"
// targets during build.

#include "x11.h"
#include "include/base/cef_logging.h"

int XErrorHandlerImpl(Display *display, XErrorEvent *event) {
 LOG(INFO) << "[Browser process] "
 << "X error received: "
 << "type " << event->type << ", "
 << "serial " << event->serial << ", "
 << "error_code " << static_cast<int>(event->error_code) << ", "
 << "request_code " << static_cast<int>(event->request_code) << ", "
 << "minor_code " << static_cast<int>(event->minor_code);
 return 0;
}

int XIOErrorHandlerImpl(Display *display) {
 return 0;
}

void InstallX11ErrorHandlers() {
 // Copied from upstream cefclient.
 // Install xlib error handlers so that the application won't be terminated
 // on non-fatal errors. Must be done after initializing GTK.
 LOG(INFO) << "[Browser process] Install X11 error handlers";
 XSetErrorHandler(XErrorHandlerImpl);
 XSetIOErrorHandler(XIOErrorHandlerImpl);
}

void SetX11WindowBounds(CefRefPtr<CefBrowser> browser,
 int x, int y, int width, int height) {
 ::Window xwindow = browser->GetHost()->GetWindowHandle();
 ::Display* xdisplay = cef_get_xdisplay();
 XWindowChanges changes = {0};
 changes.x = x;
 changes.y = y;
 changes.width = static_cast<int>(width);
 changes.height = static_cast<int>(height);
 XConfigureWindow(xdisplay, xwindow,
 CWX | CWY | CWHeight | CWWidth, &changes);
}

void SetX11WindowTitle(CefRefPtr<CefBrowser> browser, char* title) {
 ::Window xwindow = browser->GetHost()->GetWindowHandle();
 ::Display* xdisplay = cef_get_xdisplay();
 XStoreName(xdisplay, xwindow, title);
}

GtkWindow* CefBrowser_GetGtkWindow(CefRefPtr<CefBrowser> browser) {
 // TODO: Should return NULL when using the Views framework
 // -- REWRITTEN FOR CEF PYTHON USE CASE --
 // X11 window handle
 ::Window xwindow = browser->GetHost()->GetWindowHandle();
 // X11 display
 ::Display* xdisplay = cef_get_xdisplay();
 // GDK display
 GdkDisplay* gdk_display = NULL;
 if (xdisplay) {
 // See if we can find GDK display using X11 display
 gdk_display = gdk_x11_lookup_xdisplay(xdisplay);
 }
 if (!gdk_display) {
 // If not then get the default display
 gdk_display = gdk_display_get_default();
 }
 if (!gdk_display) {
 // The tkinter_.py and hello_world.py examples do not use GTK
 // internally, so GTK wasn't yet initialized and must do it
 // now, so that display is available. Also must install X11
 // error handlers to avoid 'BadWindow' errors.
 // --
 // A similar code is in cefpython_app.cpp and it might already
 // been executed. If making changes here, make changes there
 // as well.
 LOG(INFO) << "[Browser process] Initialize GTK";
 gtk_init(0, NULL);
 InstallX11ErrorHandlers();
 // Now the display is available
 gdk_display = gdk_display_get_default();
 }
 // In kivy_.py example getting error message:
 // > Can't create GtkPlug as child of non-GtkSocket
 // However dialog handler works just fine.
 GtkWidget* widget = gtk_plug_new_for_display(gdk_display, xwindow);
 // Getting top level widget doesn't seem to be required.
 // OFF: GtkWidget* toplevel = gtk_widget_get_toplevel(widget);
 GtkWindow* window = GTK_WINDOW(widget);
 if (!window) {
 LOG(ERROR) << "No GtkWindow for browser";
 }
 return window;
}

XImage* CefBrowser_GetImage(CefRefPtr<CefBrowser> browser) {
 ::Display* display = cef_get_xdisplay();
 if (!display) {
 LOG(ERROR) << "XOpenDisplay failed in CefBrowser_GetImage";
 return NULL;
 }
 ::Window browser_window = browser->GetHost()->GetWindowHandle();
 XWindowAttributes attrs;
 if (!XGetWindowAttributes(display, browser_window, &attrs)) {
 LOG(ERROR) << "XGetWindowAttributes failed in CefBrowser_GetImage";
 return NULL;
 }
 XImage* image = XGetImage(display, browser_window,
 0, 0, attrs.width, attrs.height,
 AllPlanes, ZPixmap);
 if (!image) {
 LOG(ERROR) << "XGetImage failed in CefBrowser_GetImage";
 return NULL;
 }
 return image;
}