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// 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_desktop_window_move_client.h"
#include <X11/Xlib.h>
// Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
#undef RootWindow
#include "base/debug/stack_trace.h"
#include "base/message_loop/message_loop.h"
#include "base/message_loop/message_pump_x11.h"
#include "base/run_loop.h"
#include "ui/aura/env.h"
#include "ui/aura/root_window.h"
#include "ui/aura/window.h"
#include "ui/base/x/x11_util.h"
#include "ui/events/event.h"
#include "ui/gfx/screen.h"
namespace {
// Delay moving the window.
//
// When we receive a mouse move event, we have to have it processed in a
// different run through the message pump because moving the window will
// otherwise prevent tasks from running.
//
// This constant was derived with playing with builds of chrome; it has no
// theoretical justification.
//
// TODO(erg): This helps with the performance of dragging windows, but it
// doesn't really solve the hard problems, which is that various calls to X11,
// such as XQueryPointer, ui::IsWindowVisible() and ui::WindowContainsPoint()
// take a while to get replies and block in the process. I've seen all of the
// above take as long as 20ms to respond.
const int kMoveDelay = 3;
} // namespace
namespace views {
X11DesktopWindowMoveClient::X11DesktopWindowMoveClient()
: move_loop_(this),
root_window_(NULL) {
}
X11DesktopWindowMoveClient::~X11DesktopWindowMoveClient() {}
void X11DesktopWindowMoveClient::OnMouseMovement(XMotionEvent* event) {
gfx::Point cursor_point(event->x_root, event->y_root);
gfx::Point system_loc = cursor_point - window_offset_;
gfx::Rect target_rect(system_loc, root_window_->host()->GetBounds().size());
window_move_timer_.Start(
FROM_HERE,
base::TimeDelta::FromMilliseconds(kMoveDelay),
base::Bind(&X11DesktopWindowMoveClient::SetHostBounds,
base::Unretained(this),
target_rect));
}
void X11DesktopWindowMoveClient::OnMouseReleased() {
EndMoveLoop();
}
void X11DesktopWindowMoveClient::OnMoveLoopEnded() {
root_window_ = NULL;
}
////////////////////////////////////////////////////////////////////////////////
// DesktopRootWindowHostLinux, aura::client::WindowMoveClient implementation:
aura::client::WindowMoveResult X11DesktopWindowMoveClient::RunMoveLoop(
aura::Window* source,
const gfx::Vector2d& drag_offset,
aura::client::WindowMoveSource move_source) {
window_offset_ = drag_offset;
root_window_ = source->GetDispatcher();
bool success = move_loop_.RunMoveLoop(source, root_window_->last_cursor());
return success ? aura::client::MOVE_SUCCESSFUL : aura::client::MOVE_CANCELED;
}
void X11DesktopWindowMoveClient::EndMoveLoop() {
window_move_timer_.Stop();
move_loop_.EndMoveLoop();
}
////////////////////////////////////////////////////////////////////////////////
// DesktopRootWindowHostLinux, private:
void X11DesktopWindowMoveClient::SetHostBounds(const gfx::Rect& rect) {
root_window_->SetHostBounds(rect);
}
} // namespace views
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