480 lines
16 KiB
C++
480 lines
16 KiB
C++
// Copyright 2014 The Chromium Embedded Framework Authors.
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// Portions copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "libcef/browser/native/window_x11.h"
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#include "libcef/browser/alloy/alloy_browser_host_impl.h"
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#include "libcef/browser/browser_host_base.h"
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#include "libcef/browser/thread_util.h"
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#include "net/base/network_interfaces.h"
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#include "ui/base/x/x11_util.h"
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#include "ui/events/platform/platform_event_source.h"
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#include "ui/events/platform/x11/x11_event_source.h"
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#include "ui/events/x/x11_event_translation.h"
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#include "ui/gfx/x/connection.h"
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#include "ui/gfx/x/x11_window_event_manager.h"
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#include "ui/gfx/x/xproto_util.h"
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#include "ui/views/widget/desktop_aura/desktop_window_tree_host_linux.h"
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namespace {
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const char kNetWMPid[] = "_NET_WM_PID";
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const char kNetWMPing[] = "_NET_WM_PING";
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const char kNetWMState[] = "_NET_WM_STATE";
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const char kNetWMStateKeepAbove[] = "_NET_WM_STATE_KEEP_ABOVE";
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const char kWMDeleteWindow[] = "WM_DELETE_WINDOW";
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const char kWMProtocols[] = "WM_PROTOCOLS";
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const char kXdndProxy[] = "XdndProxy";
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// Return true if |window| has any property with |property_name|.
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// Deleted from ui/base/x/x11_util.h in https://crrev.com/62fc260067.
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bool PropertyExists(x11::Window window, x11::Atom property) {
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auto response = x11::Connection::Get()
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->GetProperty(x11::GetPropertyRequest{
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.window = window,
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.property = property,
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.long_length = 1,
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})
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.Sync();
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return response && response->format;
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}
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// Returns true if |window| is visible.
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// Deleted from ui/base/x/x11_util.h in https://crrev.com/62fc260067.
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bool IsWindowVisible(x11::Window window) {
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auto response = x11::Connection::Get()->GetWindowAttributes({window}).Sync();
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if (!response || response->map_state != x11::MapState::Viewable) {
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return false;
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}
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// Minimized windows are not visible.
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std::vector<x11::Atom> wm_states;
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if (x11::GetArrayProperty(window, x11::GetAtom("_NET_WM_STATE"),
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&wm_states)) {
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x11::Atom hidden_atom = x11::GetAtom("_NET_WM_STATE_HIDDEN");
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if (base::Contains(wm_states, hidden_atom)) {
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return false;
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}
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}
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// Do not check _NET_CURRENT_DESKTOP/_NET_WM_DESKTOP since some
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// window managers (eg. i3) have per-monitor workspaces where more
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// than one workspace can be visible at once, but only one will be
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// "active".
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return true;
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}
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x11::Window FindChild(x11::Window window) {
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auto query_tree = x11::Connection::Get()->QueryTree({window}).Sync();
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if (query_tree && query_tree->children.size() == 1U) {
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return query_tree->children[0];
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}
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return x11::Window::None;
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}
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x11::Window FindToplevelParent(x11::Window window) {
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x11::Window top_level_window = window;
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do {
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auto query_tree = x11::Connection::Get()->QueryTree({window}).Sync();
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if (!query_tree) {
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break;
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}
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top_level_window = window;
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if (!PropertyExists(query_tree->parent, x11::GetAtom(kNetWMPid)) ||
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query_tree->parent == query_tree->root) {
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break;
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}
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window = query_tree->parent;
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} while (true);
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return top_level_window;
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}
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} // namespace
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CEF_EXPORT XDisplay* cef_get_xdisplay() {
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if (!CEF_CURRENTLY_ON(CEF_UIT)) {
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return nullptr;
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}
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return x11::Connection::Get()->GetXlibDisplay();
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}
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CefWindowX11::CefWindowX11(CefRefPtr<CefBrowserHostBase> browser,
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x11::Window parent_xwindow,
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const gfx::Rect& bounds,
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const std::string& title)
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: browser_(browser),
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connection_(x11::Connection::Get()),
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parent_xwindow_(parent_xwindow),
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bounds_(bounds),
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weak_ptr_factory_(this) {
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if (parent_xwindow_ == x11::Window::None) {
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parent_xwindow_ = ui::GetX11RootWindow();
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}
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x11::VisualId visual;
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uint8_t depth;
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x11::ColorMap colormap;
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ui::XVisualManager::GetInstance()->ChooseVisualForWindow(
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/*want_argb_visual=*/false, &visual, &depth, &colormap,
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/*visual_has_alpha=*/nullptr);
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xwindow_ = connection_->GenerateId<x11::Window>();
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connection_->CreateWindow({
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.depth = depth,
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.wid = xwindow_,
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.parent = parent_xwindow_,
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.x = static_cast<int16_t>(bounds.x()),
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.y = static_cast<int16_t>(bounds.y()),
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.width = static_cast<uint16_t>(bounds.width()),
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.height = static_cast<uint16_t>(bounds.height()),
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.c_class = x11::WindowClass::InputOutput,
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.visual = visual,
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.background_pixel = 0,
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.border_pixel = 0,
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.override_redirect = x11::Bool32(false),
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.colormap = colormap,
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});
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auto event_mask = x11::EventMask::FocusChange |
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x11::EventMask::StructureNotify |
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x11::EventMask::PropertyChange;
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xwindow_events_ =
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std::make_unique<x11::XScopedEventSelector>(xwindow_, event_mask);
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connection_->Flush();
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DCHECK(ui::X11EventSource::HasInstance());
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connection_->AddEventObserver(this);
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ui::X11EventSource::GetInstance()->AddPlatformEventDispatcher(this);
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std::vector<x11::Atom> protocols = {
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x11::GetAtom(kWMDeleteWindow),
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x11::GetAtom(kNetWMPing),
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};
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x11::SetArrayProperty(xwindow_, x11::GetAtom(kWMProtocols), x11::Atom::ATOM,
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protocols);
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// We need a WM_CLIENT_MACHINE value so we integrate with the desktop
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// environment.
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x11::SetStringProperty(xwindow_, x11::Atom::WM_CLIENT_MACHINE,
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x11::Atom::STRING, net::GetHostName());
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// Likewise, the X server needs to know this window's pid so it knows which
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// program to kill if the window hangs.
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// XChangeProperty() expects "pid" to be long.
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static_assert(sizeof(uint32_t) >= sizeof(pid_t),
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"pid_t should not be larger than uint32_t");
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uint32_t pid = getpid();
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x11::SetProperty(xwindow_, x11::GetAtom(kNetWMPid), x11::Atom::CARDINAL, pid);
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// Set the initial window name, if provided.
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if (!title.empty()) {
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x11::SetStringProperty(xwindow_, x11::Atom::WM_NAME, x11::Atom::STRING,
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title);
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x11::SetStringProperty(xwindow_, x11::Atom::WM_ICON_NAME, x11::Atom::STRING,
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title);
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}
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}
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CefWindowX11::~CefWindowX11() {
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DCHECK_EQ(xwindow_, x11::Window::None);
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DCHECK(ui::X11EventSource::HasInstance());
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connection_->RemoveEventObserver(this);
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ui::X11EventSource::GetInstance()->RemovePlatformEventDispatcher(this);
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}
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void CefWindowX11::Close() {
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if (xwindow_ == x11::Window::None) {
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return;
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}
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ui::SendClientMessage(
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xwindow_, xwindow_, x11::GetAtom(kWMProtocols),
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{static_cast<uint32_t>(x11::GetAtom(kWMDeleteWindow)),
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static_cast<uint32_t>(x11::Time::CurrentTime), 0, 0, 0},
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x11::EventMask::NoEvent);
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auto host = GetHost();
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if (host) {
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host->Close();
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}
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}
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void CefWindowX11::Show() {
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if (xwindow_ == x11::Window::None) {
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return;
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}
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if (!window_mapped_) {
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// Before we map the window, set size hints. Otherwise, some window managers
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// will ignore toplevel XMoveWindow commands.
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ui::SizeHints size_hints;
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memset(&size_hints, 0, sizeof(size_hints));
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ui::GetWmNormalHints(xwindow_, &size_hints);
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size_hints.flags |= ui::SIZE_HINT_P_POSITION;
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size_hints.x = bounds_.x();
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size_hints.y = bounds_.y();
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ui::SetWmNormalHints(xwindow_, size_hints);
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connection_->MapWindow({xwindow_});
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// TODO(thomasanderson): Find out why this flush is necessary.
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connection_->Flush();
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window_mapped_ = true;
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// Setup the drag and drop proxy on the top level window of the application
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// to be the child of this window.
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auto child = FindChild(xwindow_);
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auto toplevel_window = FindToplevelParent(xwindow_);
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DCHECK_NE(toplevel_window, x11::Window::None);
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if (child != x11::Window::None && toplevel_window != x11::Window::None) {
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// Configure the drag&drop proxy property for the top-most window so
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// that all drag&drop-related messages will be sent to the child
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// DesktopWindowTreeHostLinux. The proxy property is referenced by
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// DesktopDragDropClientAuraX11::FindWindowFor.
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x11::Window window = x11::Window::None;
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auto dndproxy_atom = x11::GetAtom(kXdndProxy);
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x11::GetProperty(toplevel_window, dndproxy_atom, &window);
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if (window != child) {
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// Set the proxy target for the top-most window.
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x11::SetProperty(toplevel_window, dndproxy_atom, x11::Atom::WINDOW,
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child);
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// Do the same for the proxy target per the spec.
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x11::SetProperty(child, dndproxy_atom, x11::Atom::WINDOW, child);
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}
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}
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}
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}
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void CefWindowX11::Hide() {
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if (xwindow_ == x11::Window::None) {
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return;
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}
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if (window_mapped_) {
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ui::WithdrawWindow(xwindow_);
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window_mapped_ = false;
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}
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}
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void CefWindowX11::Focus() {
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if (xwindow_ == x11::Window::None || !window_mapped_) {
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return;
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}
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x11::Window focus_target = xwindow_;
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if (browser_.get()) {
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auto child = FindChild(xwindow_);
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if (child != x11::Window::None && IsWindowVisible(child)) {
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// Give focus to the child DesktopWindowTreeHostLinux.
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focus_target = child;
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}
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}
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// Directly ask the X server to give focus to the window. Note that the call
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// would have raised an X error if the window is not mapped.
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connection_
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->SetInputFocus(
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{x11::InputFocus::Parent, focus_target, x11::Time::CurrentTime})
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.IgnoreError();
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}
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void CefWindowX11::SetBounds(const gfx::Rect& bounds) {
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if (xwindow_ == x11::Window::None) {
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return;
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}
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x11::ConfigureWindowRequest req{.window = xwindow_};
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bool origin_changed = bounds_.origin() != bounds.origin();
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bool size_changed = bounds_.size() != bounds.size();
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if (size_changed) {
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req.width = bounds.width();
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req.height = bounds.height();
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}
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if (origin_changed) {
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req.x = bounds.x();
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req.y = bounds.y();
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}
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if (origin_changed || size_changed) {
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connection_->ConfigureWindow(req);
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}
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}
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gfx::Rect CefWindowX11::GetBoundsInScreen() {
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if (auto coords =
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connection_
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->TranslateCoordinates({xwindow_, ui::GetX11RootWindow(), 0, 0})
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.Sync()) {
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return gfx::Rect(gfx::Point(coords->dst_x, coords->dst_y), bounds_.size());
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}
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return gfx::Rect();
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}
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views::DesktopWindowTreeHostLinux* CefWindowX11::GetHost() {
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if (browser_.get()) {
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auto child = FindChild(xwindow_);
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if (child != x11::Window::None) {
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return static_cast<views::DesktopWindowTreeHostLinux*>(
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views::DesktopWindowTreeHostLinux::GetHostForWidget(
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static_cast<gfx::AcceleratedWidget>(child)));
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}
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}
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return nullptr;
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}
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bool CefWindowX11::CanDispatchEvent(const ui::PlatformEvent& event) {
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auto* dispatching_event = connection_->dispatching_event();
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return dispatching_event && dispatching_event->window() == xwindow_;
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}
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uint32_t CefWindowX11::DispatchEvent(const ui::PlatformEvent& event) {
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DCHECK_NE(xwindow_, x11::Window::None);
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DCHECK(event);
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auto* current_xevent = connection_->dispatching_event();
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ProcessXEvent(*current_xevent);
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return ui::POST_DISPATCH_STOP_PROPAGATION;
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}
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void CefWindowX11::OnEvent(const x11::Event& event) {
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if (event.window() != xwindow_) {
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return;
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}
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ProcessXEvent(event);
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}
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void CefWindowX11::ContinueFocus() {
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if (!focus_pending_) {
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return;
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}
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if (browser_.get()) {
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browser_->SetFocus(true);
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}
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focus_pending_ = false;
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}
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bool CefWindowX11::TopLevelAlwaysOnTop() const {
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auto toplevel_window = FindToplevelParent(xwindow_);
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if (toplevel_window == x11::Window::None) {
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return false;
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}
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std::vector<x11::Atom> wm_states;
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if (x11::GetArrayProperty(toplevel_window, x11::GetAtom(kNetWMState),
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&wm_states)) {
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x11::Atom keep_above_atom = x11::GetAtom(kNetWMStateKeepAbove);
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if (base::Contains(wm_states, keep_above_atom)) {
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return true;
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}
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}
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return false;
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}
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void CefWindowX11::ProcessXEvent(const x11::Event& event) {
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if (auto* configure = event.As<x11::ConfigureNotifyEvent>()) {
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DCHECK_EQ(xwindow_, configure->window);
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// It's possible that the X window may be resized by some other means
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// than from within Aura (e.g. the X window manager can change the
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// size). Make sure the root window size is maintained properly.
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bounds_ = gfx::Rect(configure->x, configure->y, configure->width,
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configure->height);
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if (browser_.get()) {
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auto child = FindChild(xwindow_);
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if (child != x11::Window::None) {
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// Resize the child DesktopWindowTreeHostLinux to match this window.
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x11::ConfigureWindowRequest req{
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.window = child,
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.width = bounds_.width(),
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.height = bounds_.height(),
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};
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connection_->ConfigureWindow(req);
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browser_->NotifyMoveOrResizeStarted();
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}
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}
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} else if (auto* client = event.As<x11::ClientMessageEvent>()) {
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if (client->type == x11::GetAtom(kWMProtocols)) {
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x11::Atom protocol = static_cast<x11::Atom>(client->data.data32[0]);
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if (protocol == x11::GetAtom(kWMDeleteWindow)) {
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// We have received a close message from the window manager.
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if (!browser_ || browser_->TryCloseBrowser()) {
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// Allow the close.
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connection_->DestroyWindow({xwindow_});
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xwindow_ = x11::Window::None;
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if (browser_) {
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// Force the browser to be destroyed and release the reference
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// added in PlatformCreateWindow().
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static_cast<AlloyBrowserHostImpl*>(browser_.get())
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->WindowDestroyed();
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}
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delete this;
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}
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} else if (protocol == x11::GetAtom(kNetWMPing)) {
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x11::ClientMessageEvent reply_event = *client;
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reply_event.window = parent_xwindow_;
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x11::SendEvent(reply_event, reply_event.window,
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x11::EventMask::SubstructureNotify |
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x11::EventMask::SubstructureRedirect);
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}
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}
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} else if (auto* focus = event.As<x11::FocusEvent>()) {
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if (focus->opcode == x11::FocusEvent::In) {
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// This message is received first followed by a "_NET_ACTIVE_WINDOW"
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// message sent to the root window. When X11DesktopHandler handles the
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// "_NET_ACTIVE_WINDOW" message it will erroneously mark the WebView
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// (hosted in a DesktopWindowTreeHostLinux) as unfocused. Use a delayed
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// task here to restore the WebView's focus state.
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if (!focus_pending_) {
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focus_pending_ = true;
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CEF_POST_DELAYED_TASK(CEF_UIT,
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base::BindOnce(&CefWindowX11::ContinueFocus,
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weak_ptr_factory_.GetWeakPtr()),
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100);
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}
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} else {
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// Cancel the pending focus change if some other window has gained focus
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// while waiting for the async task to run. Otherwise we can get stuck in
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// a focus change loop.
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if (focus_pending_) {
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focus_pending_ = false;
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}
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}
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} else if (auto* property = event.As<x11::PropertyNotifyEvent>()) {
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const auto& wm_state_atom = x11::GetAtom(kNetWMState);
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if (property->atom == wm_state_atom) {
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// State change event like minimize/maximize.
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if (browser_.get()) {
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auto child = FindChild(xwindow_);
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if (child != x11::Window::None) {
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// Forward the state change to the child DesktopWindowTreeHostLinux
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// window so that resource usage will be reduced while the window is
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// minimized. |atom_list| may be empty.
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std::vector<x11::Atom> atom_list;
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x11::GetArrayProperty(xwindow_, wm_state_atom, &atom_list);
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x11::SetArrayProperty(child, wm_state_atom, x11::Atom::ATOM,
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atom_list);
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}
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}
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}
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}
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}
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