78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
// Copyright (c) 2014 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "atom/browser/ui/x/window_state_watcher.h"
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#include <X11/Xlib.h>
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#include "ui/events/platform/platform_event_source.h"
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namespace atom {
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namespace {
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const char* kAtomsToCache[] = {
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"_NET_WM_STATE",
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NULL,
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};
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} // namespace
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WindowStateWatcher::WindowStateWatcher(NativeWindowViews* window)
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: window_(window),
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widget_(window->GetAcceleratedWidget()),
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atom_cache_(gfx::GetXDisplay(), kAtomsToCache),
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was_minimized_(false),
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was_maximized_(false) {
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ui::PlatformEventSource::GetInstance()->AddPlatformEventObserver(this);
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}
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WindowStateWatcher::~WindowStateWatcher() {
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ui::PlatformEventSource::GetInstance()->RemovePlatformEventObserver(this);
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}
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void WindowStateWatcher::WillProcessEvent(const ui::PlatformEvent& event) {
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if (IsWindowStateEvent(event)) {
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was_minimized_ = window_->IsMinimized();
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was_maximized_ = window_->IsMaximized();
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}
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}
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void WindowStateWatcher::DidProcessEvent(const ui::PlatformEvent& event) {
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if (IsWindowStateEvent(event)) {
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bool is_minimized = window_->IsMinimized();
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bool is_maximized = window_->IsMaximized();
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bool is_fullscreen = window_->IsFullscreen();
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if (is_minimized != was_minimized_) {
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if (is_minimized)
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window_->NotifyWindowMinimize();
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else
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window_->NotifyWindowRestore();
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} else if (is_maximized != was_maximized_) {
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if (is_maximized)
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window_->NotifyWindowMaximize();
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else
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window_->NotifyWindowUnmaximize();
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} else {
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// If this is neither a "maximize" or "minimize" event, then we think it
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// is a "fullscreen" event.
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// The "IsFullscreen()" becomes true immediately before "WillProcessEvent"
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// is called, so we can not handle this like "maximize" and "minimize" by
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// watching whether they have changed.
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if (is_fullscreen)
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window_->NotifyWindowEnterFullScreen();
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else
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window_->NotifyWindowLeaveFullScreen();
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}
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}
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}
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bool WindowStateWatcher::IsWindowStateEvent(const ui::PlatformEvent& event) {
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::Atom changed_atom = event->xproperty.atom;
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return (changed_atom == atom_cache_.GetAtom("_NET_WM_STATE") &&
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event->type == PropertyNotify &&
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event->xproperty.window == widget_);
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}
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} // namespace atom
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