62 lines
2 KiB
C++
62 lines
2 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 "shell/browser/ui/x/window_state_watcher.h"
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#include "ui/gfx/x/x11.h"
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#include "ui/gfx/x/x11_atom_cache.h"
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namespace electron {
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WindowStateWatcher::WindowStateWatcher(NativeWindowViews* window)
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: window_(window), widget_(window->GetAcceleratedWidget()) {
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ui::X11EventSource::GetInstance()->AddXEventObserver(this);
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}
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WindowStateWatcher::~WindowStateWatcher() {
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ui::X11EventSource::GetInstance()->RemoveXEventObserver(this);
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}
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void WindowStateWatcher::WillProcessXEvent(XEvent* xev) {
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if (IsWindowStateEvent(xev)) {
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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::DidProcessXEvent(XEvent* xev) {
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if (IsWindowStateEvent(xev)) {
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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(XEvent* xev) {
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::Atom changed_atom = xev->xproperty.atom;
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return (changed_atom == gfx::GetAtom("_NET_WM_STATE") &&
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xev->type == PropertyNotify && xev->xproperty.window == widget_);
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}
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} // namespace electron
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