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296 lines (277 loc) · 10.9 KB
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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"
#include "include/base/cef_callback.h"
#include "include/cef_task.h"
#include "include/wrapper/cef_closure_task.h"
#include <string.h>
#include <unistd.h>
#include <X11/Xatom.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);
}
// Since Chromium 128 the browser window is created with the default
// visual and a colormap inherited from the parent window. Creating it
// fails with a MatchError when the parent window uses a different
// visual, which is the case with GTK 3 (also wxPython). In such case
// a wrapper window with the default visual is created between the
// parent window and the browser window.
static const char kWrapperProperty[] = "_CEFPYTHON_BROWSER_WRAPPER";
static bool IsX11WrapperWindow(::Display* xdisplay, ::Window xwindow) {
Atom property = XInternAtom(xdisplay, kWrapperProperty, True);
if (property == None)
return false;
Atom type = None;
int format = 0;
unsigned long nitems = 0, bytes_after = 0;
unsigned char* data = NULL;
bool ret = false;
if (XGetWindowProperty(xdisplay, xwindow, property, 0, 1, False,
XA_CARDINAL, &type, &format, &nitems,
&bytes_after, &data) == 0) {
ret = (type == XA_CARDINAL);
if (data)
XFree(data);
}
return ret;
}
// Returns the wrapper window that is the parent of the browser
// window, or 0 when there is no wrapper window.
static ::Window GetX11WrapperWindow(::Display* xdisplay, ::Window xwindow) {
::Window root = 0, parent = 0;
::Window* children = NULL;
unsigned int nchildren = 0;
if (!XQueryTree(xdisplay, xwindow, &root, &parent, &children,
&nchildren))
return 0;
if (children)
XFree(children);
if (parent && parent != root && IsX11WrapperWindow(xdisplay, parent))
return parent;
return 0;
}
::Window GetX11BrowserParentWindow(::Window parent, int x, int y,
int width, int height) {
::Display* xdisplay = cef_get_xdisplay();
if (!xdisplay || !parent)
return parent;
XWindowAttributes attrs;
if (!XGetWindowAttributes(xdisplay, parent, &attrs))
return parent;
int screen = DefaultScreen(xdisplay);
Visual* visual = DefaultVisual(xdisplay, screen);
if (XVisualIDFromVisual(attrs.visual) == XVisualIDFromVisual(visual))
return parent;
if (width <= 0 || height <= 0) {
width = attrs.width;
height = attrs.height;
}
XSetWindowAttributes wrapper_attrs = {};
wrapper_attrs.colormap = DefaultColormap(xdisplay, screen);
wrapper_attrs.border_pixel = 0;
wrapper_attrs.background_pixel = WhitePixel(xdisplay, screen);
::Window wrapper = XCreateWindow(
xdisplay, parent, x, y, width > 0 ? width : 1,
height > 0 ? height : 1, 0, DefaultDepth(xdisplay, screen),
InputOutput, visual, CWColormap | CWBorderPixel | CWBackPixel,
&wrapper_attrs);
if (!wrapper)
return parent;
unsigned long value = 1;
XChangeProperty(xdisplay, wrapper,
XInternAtom(xdisplay, kWrapperProperty, False),
XA_CARDINAL, 32, PropModeReplace,
reinterpret_cast<unsigned char*>(&value), 1);
XMapWindow(xdisplay, wrapper);
// The browser window is created using another X connection
XSync(xdisplay, False);
LOG(INFO) << "[Browser process] Created X11 wrapper window for"
" parent window with non-default visual";
return wrapper;
}
static void DestroyX11WindowTask(::Window xwindow) {
::Display* xdisplay = cef_get_xdisplay();
if (xdisplay) {
XDestroyWindow(xdisplay, xwindow);
XFlush(xdisplay);
}
}
void DestroyX11WrapperWindow(CefRefPtr<CefBrowser> browser) {
::Display* xdisplay = cef_get_xdisplay();
if (!xdisplay)
return;
::Window wrapper = GetX11WrapperWindow(
xdisplay, browser->GetHost()->GetWindowHandle());
if (!wrapper)
return;
// Hide it now and destroy it after the browser window was
// destroyed by CEF.
XUnmapWindow(xdisplay, wrapper);
XFlush(xdisplay);
CefPostDelayedTask(TID_UI, base::BindOnce(&DestroyX11WindowTask,
wrapper), 2000);
}
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);
::Window wrapper = GetX11WrapperWindow(xdisplay, xwindow);
if (wrapper) {
XConfigureWindow(xdisplay, wrapper,
CWX | CWY | CWHeight | CWWidth, &changes);
changes.x = 0;
changes.y = 0;
}
XConfigureWindow(xdisplay, xwindow,
CWX | CWY | CWHeight | CWWidth, &changes);
}
// Returns the _NET_WM_PID property of a window or 0 when not set.
static unsigned long GetX11WindowPid(::Display* xdisplay, ::Window xwindow) {
Atom net_wm_pid = XInternAtom(xdisplay, "_NET_WM_PID", True);
if (net_wm_pid == None)
return 0;
Atom type = None;
int format = 0;
unsigned long nitems = 0, bytes_after = 0;
unsigned char* data = NULL;
unsigned long pid = 0;
if (XGetWindowProperty(xdisplay, xwindow, net_wm_pid, 0, 1, False,
XA_CARDINAL, &type, &format, &nitems,
&bytes_after, &data) == 0) {
if (data && type == XA_CARDINAL && format == 32 && nitems == 1)
pid = *reinterpret_cast<unsigned long*>(data);
if (data)
XFree(data);
}
return pid;
}
// Returns the top-level window for a CEF browser window that was
// created without a parent window. This is the topmost ancestor that
// belongs to the current process (Chromium sets _NET_WM_PID on its
// top-level windows). Never returns a window manager's frame window.
static ::Window GetX11TopLevelWindow(::Display* xdisplay, ::Window xwindow) {
const unsigned long pid = static_cast<unsigned long>(getpid());
::Window toplevel = xwindow;
::Window current = xwindow;
while (current) {
if (GetX11WindowPid(xdisplay, current) == pid)
toplevel = current;
::Window root = 0, parent = 0;
::Window* children = NULL;
unsigned int nchildren = 0;
if (!XQueryTree(xdisplay, current, &root, &parent, &children,
&nchildren))
break;
if (children)
XFree(children);
if (!parent || parent == root)
break;
current = parent;
}
return toplevel;
}
void SetX11WindowTitle(CefRefPtr<CefBrowser> browser, char* title) {
::Display* xdisplay = cef_get_xdisplay();
::Window xwindow = GetX11TopLevelWindow(
xdisplay, browser->GetHost()->GetWindowHandle());
XStoreName(xdisplay, xwindow, title);
// Modern window managers read the UTF-8 _NET_WM_NAME property.
XChangeProperty(xdisplay, xwindow,
XInternAtom(xdisplay, "_NET_WM_NAME", False),
XInternAtom(xdisplay, "UTF8_STRING", False), 8,
PropModeReplace,
reinterpret_cast<unsigned char*>(title),
static_cast<int>(strlen(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;
}