| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/views/widget/desktop_aura/x11_window_event_filter.h" |
| |
| #include <X11/extensions/XInput.h> |
| #include <X11/extensions/XInput2.h> |
| #include <X11/Xatom.h> |
| #include <X11/Xlib.h> |
| |
| #include "base/message_loop/message_pump_aurax11.h" |
| #include "ui/aura/root_window.h" |
| #include "ui/aura/window_delegate.h" |
| #include "ui/base/events/event.h" |
| #include "ui/base/events/event_utils.h" |
| #include "ui/base/hit_test.h" |
| #include "ui/views/widget/desktop_aura/desktop_activation_client.h" |
| #include "ui/views/widget/native_widget_aura.h" |
| |
| namespace { |
| |
| // These constants are defined in the Extended Window Manager Hints |
| // standard...and aren't in any header that I can find. |
| const int k_NET_WM_MOVERESIZE_SIZE_TOPLEFT = 0; |
| const int k_NET_WM_MOVERESIZE_SIZE_TOP = 1; |
| const int k_NET_WM_MOVERESIZE_SIZE_TOPRIGHT = 2; |
| const int k_NET_WM_MOVERESIZE_SIZE_RIGHT = 3; |
| const int k_NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT = 4; |
| const int k_NET_WM_MOVERESIZE_SIZE_BOTTOM = 5; |
| const int k_NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT = 6; |
| const int k_NET_WM_MOVERESIZE_SIZE_LEFT = 7; |
| const int k_NET_WM_MOVERESIZE_MOVE = 8; |
| |
| // This data structure represents additional hints that we send to the window |
| // manager and has a direct lineage back to Motif, which defined this de facto |
| // standard. This struct doesn't seem 64-bit safe though, but it's what GDK |
| // does. |
| typedef struct { |
| unsigned long flags; |
| unsigned long functions; |
| unsigned long decorations; |
| long input_mode; |
| unsigned long status; |
| } MotifWmHints; |
| |
| // The bitflag in |flags| in MotifWmHints that signals that the reader should |
| // pay attention to the value in |decorations|. |
| const unsigned long kHintsDecorations = (1L << 1); |
| |
| const char* kAtomsToCache[] = { |
| "_MOTIF_WM_HINTS", |
| "_NET_WM_MOVERESIZE", |
| NULL |
| }; |
| |
| } // namespace |
| |
| namespace views { |
| |
| X11WindowEventFilter::X11WindowEventFilter( |
| aura::RootWindow* root_window, |
| DesktopActivationClient* activation_client) |
| : activation_client_(activation_client), |
| xdisplay_(base::MessagePumpAuraX11::GetDefaultXDisplay()), |
| xwindow_(root_window->GetAcceleratedWidget()), |
| x_root_window_(DefaultRootWindow(xdisplay_)), |
| atom_cache_(xdisplay_, kAtomsToCache), |
| is_active_(false) { |
| } |
| |
| X11WindowEventFilter::~X11WindowEventFilter() { |
| } |
| |
| void X11WindowEventFilter::SetUseHostWindowBorders(bool use_os_border) { |
| MotifWmHints motif_hints; |
| memset(&motif_hints, 0, sizeof(motif_hints)); |
| motif_hints.flags = kHintsDecorations; |
| motif_hints.decorations = use_os_border ? 1 : 0; |
| |
| ::Atom hint_atom = atom_cache_.GetAtom("_MOTIF_WM_HINTS"); |
| XChangeProperty(base::MessagePumpAuraX11::GetDefaultXDisplay(), |
| xwindow_, |
| hint_atom, |
| hint_atom, |
| 32, |
| PropModeReplace, |
| reinterpret_cast<unsigned char*>(&motif_hints), |
| sizeof(MotifWmHints)/sizeof(long)); |
| } |
| |
| void X11WindowEventFilter::OnMouseEvent(ui::MouseEvent* event) { |
| if (event->type() != ui::ET_MOUSE_PRESSED) |
| return; |
| |
| if (!event->IsLeftMouseButton()) |
| return; |
| |
| aura::Window* target = static_cast<aura::Window*>(event->target()); |
| int component = |
| target->delegate()->GetNonClientComponent(event->location()); |
| if (component == HTCLIENT) |
| return; |
| |
| // Get the |x_root_window_| location out of the native event. |
| if (event->native_event()) { |
| const gfx::Point x_root_location = |
| ui::EventSystemLocationFromNative(event->native_event()); |
| if (DispatchHostWindowDragMovement(component, x_root_location)) |
| event->StopPropagation(); |
| } |
| } |
| |
| bool X11WindowEventFilter::DispatchHostWindowDragMovement( |
| int hittest, |
| const gfx::Point& screen_location) { |
| int direction = -1; |
| switch (hittest) { |
| case HTBOTTOM: |
| direction = k_NET_WM_MOVERESIZE_SIZE_BOTTOM; |
| break; |
| case HTBOTTOMLEFT: |
| direction = k_NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT; |
| break; |
| case HTBOTTOMRIGHT: |
| direction = k_NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT; |
| break; |
| case HTCAPTION: |
| direction = k_NET_WM_MOVERESIZE_MOVE; |
| break; |
| case HTLEFT: |
| direction = k_NET_WM_MOVERESIZE_SIZE_LEFT; |
| break; |
| case HTRIGHT: |
| direction = k_NET_WM_MOVERESIZE_SIZE_RIGHT; |
| break; |
| case HTTOP: |
| direction = k_NET_WM_MOVERESIZE_SIZE_TOP; |
| break; |
| case HTTOPLEFT: |
| direction = k_NET_WM_MOVERESIZE_SIZE_TOPLEFT; |
| break; |
| case HTTOPRIGHT: |
| direction = k_NET_WM_MOVERESIZE_SIZE_TOPRIGHT; |
| break; |
| default: |
| return false; |
| } |
| |
| // We most likely have an implicit grab right here. We need to dump it |
| // because what we're about to do is tell the window manager |
| // that it's now responsible for moving the window around; it immediately |
| // grabs when it receives the event below. |
| XUngrabPointer(xdisplay_, CurrentTime); |
| |
| XEvent event; |
| memset(&event, 0, sizeof(event)); |
| event.xclient.type = ClientMessage; |
| event.xclient.display = xdisplay_; |
| event.xclient.window = xwindow_; |
| event.xclient.message_type = atom_cache_.GetAtom("_NET_WM_MOVERESIZE"); |
| event.xclient.format = 32; |
| event.xclient.data.l[0] = screen_location.x(); |
| event.xclient.data.l[1] = screen_location.y(); |
| event.xclient.data.l[2] = direction; |
| event.xclient.data.l[3] = 0; |
| event.xclient.data.l[4] = 0; |
| |
| XSendEvent(xdisplay_, x_root_window_, False, |
| SubstructureRedirectMask | SubstructureNotifyMask, |
| &event); |
| |
| return true; |
| } |
| |
| } // namespace views |