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x11.cpp
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// 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;
}