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// Copyright (c) 2010 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 "views/event.h"
#include <gdk/gdkx.h>
#if defined(HAVE_XINPUT2)
#include <X11/extensions/XInput2.h>
#endif
#include "ui/base/keycodes/keyboard_code_conversion_x.h"
#include "views/widget/root_view.h"
#include "views/widget/widget_gtk.h"
namespace views {
namespace {
int GetEventFlagsFromXState(unsigned int state) {
int flags = 0;
if (state & ControlMask)
flags |= Event::EF_CONTROL_DOWN;
if (state & ShiftMask)
flags |= Event::EF_SHIFT_DOWN;
if (state & Mod1Mask)
flags |= Event::EF_ALT_DOWN;
if (state & LockMask)
flags |= Event::EF_CAPS_LOCK_DOWN;
if (state & Button1Mask)
flags |= Event::EF_LEFT_BUTTON_DOWN;
if (state & Button2Mask)
flags |= Event::EF_MIDDLE_BUTTON_DOWN;
if (state & Button3Mask)
flags |= Event::EF_RIGHT_BUTTON_DOWN;
return flags;
}
// Get the event flag for the button in XButtonEvent. During a ButtonPress
// event, |state| in XButtonEvent does not include the button that has just been
// pressed. Instead |state| contains flags for the buttons (if any) that had
// already been pressed before the current button, and |button| stores the most
// current pressed button. So, if you press down left mouse button, and while
// pressing it down, press down the right mouse button, then for the latter
// event, |state| would have Button1Mask set but not Button3Mask, and |button|
// would be 3.
int GetEventFlagsForButton(int button) {
switch (button) {
case 1:
return Event::EF_LEFT_BUTTON_DOWN;
case 2:
return Event::EF_MIDDLE_BUTTON_DOWN;
case 3:
return Event::EF_RIGHT_BUTTON_DOWN;
}
DLOG(WARNING) << "Unexpected button (" << button << ") received.";
return 0;
}
#if defined(HAVE_XINPUT2)
int GetButtonMaskForX2Event(XIDeviceEvent* xievent) {
int buttonflags = 0;
for (int i = 0; i < 8 * xievent->buttons.mask_len; i++) {
if (XIMaskIsSet(xievent->buttons.mask, i)) {
buttonflags |= GetEventFlagsForButton(i);
}
}
return buttonflags;
}
Event::EventType GetTouchEventType(XEvent* xev) {
XGenericEventCookie* cookie = &xev->xcookie;
switch (cookie->evtype) {
case XI_ButtonPress:
return Event::ET_TOUCH_PRESSED;
case XI_ButtonRelease:
return Event::ET_TOUCH_RELEASED;
case XI_Motion:
return Event::ET_TOUCH_MOVED;
// Note: We will not generate a _STATIONARY event here. It will be created,
// when necessary, by a RWHVV.
// TODO(sad): When do we trigger a _CANCELLED event? Maybe that will also be
// done by a RWHVV, e.g. when it gets destroyed in the middle of a
// touch-sequence?
}
return Event::ET_UNKNOWN;
}
gfx::Point GetTouchEventLocation(XEvent* xev) {
XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev->xcookie.data);
return gfx::Point(xiev->event_x, xiev->event_y);
}
int GetTouchEventFlags(XEvent* xev) {
XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev->xcookie.data);
return GetButtonMaskForX2Event(xiev) |
GetEventFlagsFromXState(xiev->mods.effective);
}
int GetTouchIDFromXEvent(XEvent* xev) {
// TODO(sad): How we determine the touch-id from the event is as yet
// undecided.
XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev->xcookie.data);
return xiev->sourceid;
}
#endif // HAVE_XINPUT2
Event::EventType GetMouseEventType(XEvent* xev) {
switch (xev->type) {
case ButtonPress:
return Event::ET_MOUSE_PRESSED;
case ButtonRelease:
return Event::ET_MOUSE_RELEASED;
case MotionNotify:
if (xev->xmotion.state & (Button1Mask | Button2Mask | Button3Mask)) {
return Event::ET_MOUSE_DRAGGED;
}
return Event::ET_MOUSE_MOVED;
#if defined(HAVE_XINPUT2)
case GenericEvent: {
XIDeviceEvent* xievent =
static_cast<XIDeviceEvent*>(xev->xcookie.data);
switch (xievent->evtype) {
case XI_ButtonPress:
return Event::ET_MOUSE_PRESSED;
case XI_ButtonRelease:
return Event::ET_MOUSE_RELEASED;
case XI_Motion:
return GetButtonMaskForX2Event(xievent) ? Event::ET_MOUSE_DRAGGED :
Event::ET_MOUSE_MOVED;
}
}
#endif
}
return Event::ET_UNKNOWN;
}
gfx::Point GetMouseEventLocation(XEvent* xev) {
switch (xev->type) {
case ButtonPress:
case ButtonRelease:
return gfx::Point(xev->xbutton.x, xev->xbutton.y);
case MotionNotify:
return gfx::Point(xev->xmotion.x, xev->xmotion.y);
#if defined(HAVE_XINPUT2)
case GenericEvent: {
XIDeviceEvent* xievent =
static_cast<XIDeviceEvent*>(xev->xcookie.data);
return gfx::Point(static_cast<int>(xievent->event_x),
static_cast<int>(xievent->event_y));
}
#endif
}
return gfx::Point();
}
int GetMouseEventFlags(XEvent* xev) {
switch (xev->type) {
case ButtonPress:
case ButtonRelease:
return GetEventFlagsFromXState(xev->xbutton.state) |
GetEventFlagsForButton(xev->xbutton.button);
case MotionNotify:
return GetEventFlagsFromXState(xev->xmotion.state);
#if defined(HAVE_XINPUT2)
case GenericEvent: {
XIDeviceEvent* xievent = static_cast<XIDeviceEvent*>(xev->xcookie.data);
switch (xievent->evtype) {
case XI_ButtonPress:
case XI_ButtonRelease:
return GetButtonMaskForX2Event(xievent) |
GetEventFlagsFromXState(xievent->mods.effective) |
GetEventFlagsForButton(xievent->detail);
case XI_Motion:
return GetButtonMaskForX2Event(xievent) |
GetEventFlagsFromXState(xievent->mods.effective);
}
}
#endif
}
return 0;
}
} // namespace
KeyEvent::KeyEvent(XEvent* xev)
: Event(xev->type == KeyPress ?
Event::ET_KEY_PRESSED : Event::ET_KEY_RELEASED,
GetEventFlagsFromXState(xev->xkey.state)),
key_code_(ui::KeyboardCodeFromXKeyEvent(xev)),
repeat_count_(0),
message_flags_(0),
native_event_(NULL) {
}
MouseEvent::MouseEvent(XEvent* xev)
: LocatedEvent(GetMouseEventType(xev),
GetMouseEventLocation(xev),
GetMouseEventFlags(xev)) {
}
MouseWheelEvent::MouseWheelEvent(XEvent* xev)
: LocatedEvent(Event::ET_MOUSEWHEEL,
GetMouseEventLocation(xev),
GetEventFlagsFromXState(xev->xbutton.state)),
offset_(xev->xbutton.button == 4 ? 53 : -53) { // '53' is also the value
// used for GTK+.
}
#if defined(HAVE_XINPUT2)
TouchEvent::TouchEvent(XEvent* xev)
: LocatedEvent(GetTouchEventType(xev),
GetTouchEventLocation(xev),
GetTouchEventFlags(xev)),
touch_id_(GetTouchIDFromXEvent(xev)) {
}
#endif
} // namespace views
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