/******************************************************************** KWin - the KDE window manager This file is part of the KDE project. Copyright (C) 1999, 2000 Matthias Ettrich Copyright (C) 2003 Lubos Lunak Copyright (C) 2012 Martin Gräßlin This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . *********************************************************************/ #include "windowselector.h" #include "client.h" #include "cursor.h" #include "unmanaged.h" #include "workspace.h" #include "xcbutils.h" // XLib #include #include #include // XCB #include namespace KWin { WindowSelector::WindowSelector() : X11EventFilter(QVector{XCB_BUTTON_PRESS, XCB_BUTTON_RELEASE, XCB_MOTION_NOTIFY, XCB_ENTER_NOTIFY, XCB_LEAVE_NOTIFY, XCB_KEY_PRESS, XCB_KEY_RELEASE, XCB_FOCUS_IN, XCB_FOCUS_OUT }) , m_active(false) { } WindowSelector::~WindowSelector() { } void WindowSelector::start(std::function callback, const QByteArray &cursorName) { if (m_active) { callback(nullptr); return; } m_active = activate(cursorName); if (!m_active) { callback(nullptr); return; } m_callback = callback; } void WindowSelector::start(std::function callback) { if (m_active) { callback(QPoint(-1, -1)); return; } m_active = activate(); if (!m_active) { callback(QPoint(-1, -1)); return; } m_pointSelectionFallback = callback; } bool WindowSelector::activate(const QByteArray &cursorName) { xcb_cursor_t cursor = createCursor(cursorName); xcb_connection_t *c = connection(); ScopedCPointer grabPointer(xcb_grab_pointer_reply(c, xcb_grab_pointer_unchecked(c, false, rootWindow(), XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION | XCB_EVENT_MASK_ENTER_WINDOW | XCB_EVENT_MASK_LEAVE_WINDOW, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, XCB_WINDOW_NONE, cursor, XCB_TIME_CURRENT_TIME), nullptr)); if (grabPointer.isNull() || grabPointer->status != XCB_GRAB_STATUS_SUCCESS) { return false; } const bool grabbed = grabXKeyboard(); if (grabbed) { grabXServer(); } else { xcb_ungrab_pointer(connection(), XCB_TIME_CURRENT_TIME); } return grabbed; } xcb_cursor_t WindowSelector::createCursor(const QByteArray &cursorName) { if (cursorName.isEmpty()) { return Cursor::x11Cursor(Qt::CrossCursor); } xcb_cursor_t cursor = Cursor::x11Cursor(cursorName); if (cursor != XCB_CURSOR_NONE) { return cursor; } if (cursorName == QByteArrayLiteral("pirate")) { // special handling for font pirate cursor static xcb_cursor_t kill_cursor = XCB_CURSOR_NONE; if (kill_cursor != XCB_CURSOR_NONE) { return kill_cursor; } // fallback on font xcb_connection_t *c = connection(); const xcb_font_t cursorFont = xcb_generate_id(c); xcb_open_font(c, cursorFont, strlen ("cursor"), "cursor"); cursor = xcb_generate_id(c); xcb_create_glyph_cursor(c, cursor, cursorFont, cursorFont, XC_pirate, /* source character glyph */ XC_pirate + 1, /* mask character glyph */ 0, 0, 0, 0, 0, 0); /* r b g r b g */ kill_cursor = cursor; } return cursor; } void WindowSelector::processEvent(xcb_generic_event_t *event) { if (event->response_type == XCB_BUTTON_RELEASE) { xcb_button_release_event_t *buttonEvent = reinterpret_cast(event); handleButtonRelease(buttonEvent->detail, buttonEvent->child); } else if (event->response_type == XCB_KEY_PRESS) { xcb_key_press_event_t *keyEvent = reinterpret_cast(event); handleKeyPress(keyEvent->detail, keyEvent->state); } } bool WindowSelector::event(xcb_generic_event_t *event) { if (!m_active) { return false; } processEvent(event); return true; } void WindowSelector::handleButtonRelease(xcb_button_t button, xcb_window_t window) { if (button == XCB_BUTTON_INDEX_3) { cancelCallback(); release(); return; } if (button == XCB_BUTTON_INDEX_1 || button == XCB_BUTTON_INDEX_2) { if (m_callback) { selectWindowId(window); } else if (m_pointSelectionFallback) { m_pointSelectionFallback(Cursor::pos()); } release(); return; } } void WindowSelector::handleKeyPress(xcb_keycode_t keycode, uint16_t state) { xcb_key_symbols_t *symbols = xcb_key_symbols_alloc(connection()); xcb_keysym_t kc = xcb_key_symbols_get_keysym(symbols, keycode, 0); int mx = 0; int my = 0; const bool returnPressed = (kc == XK_Return) || (kc == XK_space); const bool escapePressed = (kc == XK_Escape); if (kc == XK_Left) { mx = -10; } if (kc == XK_Right) { mx = 10; } if (kc == XK_Up) { my = -10; } if (kc == XK_Down) { my = 10; } if (state & XCB_MOD_MASK_CONTROL) { mx /= 10; my /= 10; } Cursor::setPos(Cursor::pos() + QPoint(mx, my)); if (returnPressed) { if (m_callback) { selectWindowUnderPointer(); } else if (m_pointSelectionFallback) { m_pointSelectionFallback(Cursor::pos()); } } if (returnPressed || escapePressed) { if (escapePressed) { cancelCallback(); } release(); } xcb_key_symbols_free(symbols); } void WindowSelector::selectWindowUnderPointer() { Xcb::Pointer pointer(rootWindow()); if (!pointer.isNull() && pointer->child != XCB_WINDOW_NONE) { selectWindowId(pointer->child); } } void WindowSelector::release() { ungrabXKeyboard(); xcb_ungrab_pointer(connection(), XCB_TIME_CURRENT_TIME); ungrabXServer(); m_active = false; m_callback = std::function(); m_pointSelectionFallback = std::function(); } void WindowSelector::selectWindowId(xcb_window_t window_to_select) { if (window_to_select == XCB_WINDOW_NONE) { m_callback(nullptr); return; } xcb_window_t window = window_to_select; Client* client = nullptr; while (true) { client = Workspace::self()->findClient(Predicate::FrameIdMatch, window); if (client) { break; // Found the client } Xcb::Tree tree(window); if (window == tree->root) { // We didn't find the client, probably an override-redirect window break; } window = tree->parent; // Go up } if (client) { m_callback(client); } else { m_callback(Workspace::self()->findUnmanaged(window)); } } void WindowSelector::cancelCallback() { if (m_callback) { m_callback(nullptr); } else if (m_pointSelectionFallback) { m_pointSelectionFallback(QPoint(-1, -1)); } } } // namespace