keys.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:7k
源码类别:
midi
开发平台:
Unix_Linux
- /**
- * @file keys.c
- * @brief X C Bindings VLC keyboard event handling
- */
- /*****************************************************************************
- * Copyright © 2009 Rémi Denis-Courmont
- *
- * This library 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 2.0
- * of the License, or (at your option) any later version.
- *
- * This library 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 Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- ****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include <config.h>
- #endif
- #include <stdlib.h>
- #include <inttypes.h>
- #include <ctype.h>
- #include <assert.h>
- #include <xcb/xcb.h>
- #include <xcb/xcb_keysyms.h>
- #include <X11/keysym.h>
- #include <X11/XF86keysym.h>
- #include <vlc_common.h>
- #include <vlc_keys.h>
- #include "xcb_vlc.h"
- struct key_handler_t
- {
- vlc_object_t *obj;
- xcb_key_symbols_t *syms;
- };
- /**
- * Create an X11 key event handler for a VLC window.
- * The caller shall arrange receiving applicable X11 events, and pass them to
- * ProcessKeyEvent() later.
- *
- * @param obj VLC object owning an X window
- * @param conn XCB connection to the X server (to fetch key mappings)
- * @return NULL on error, or a key handling context.
- */
- key_handler_t *CreateKeyHandler (vlc_object_t *obj, xcb_connection_t *conn)
- {
- key_handler_t *ctx = malloc (sizeof (*ctx));
- if (!ctx)
- return NULL;
- ctx->obj = obj;
- ctx->syms = xcb_key_symbols_alloc (conn);
- return ctx;
- }
- void DestroyKeyHandler (key_handler_t *ctx)
- {
- xcb_key_symbols_free (ctx->syms);
- free (ctx);
- }
- static int keysymcmp (const void *pa, const void *pb)
- {
- int a = *(const xcb_keysym_t *)pa;
- int b = *(const xcb_keysym_t *)pb;
- return a - b;
- }
- static int ConvertKeySym (xcb_keysym_t sym)
- {
- static const struct
- {
- xcb_keysym_t x11;
- uint32_t vlc;
- } *res, tab[] = {
- /* This list MUST be in XK_* incremental order (see keysymdef.h),
- * so that binary search works.
- * Multiple X keys can match the same VLC key.
- * X key symbols must be in the first column of the struct. */
- { XK_BackSpace, KEY_BACKSPACE, },
- { XK_Tab, KEY_TAB, },
- { XK_Return, KEY_ENTER, },
- { XK_Escape, KEY_ESC, },
- { XK_Home, KEY_HOME, },
- { XK_Left, KEY_LEFT, },
- { XK_Up, KEY_UP, },
- { XK_Right, KEY_RIGHT, },
- { XK_Down, KEY_DOWN, },
- { XK_Page_Up, KEY_PAGEUP, },
- { XK_Page_Down, KEY_PAGEDOWN, },
- { XK_End, KEY_END, },
- { XK_Begin, KEY_HOME, },
- { XK_Insert, KEY_INSERT, },
- { XK_Menu, KEY_MENU },
- { XK_KP_Space, KEY_SPACE, },
- { XK_KP_Tab, KEY_TAB, },
- { XK_KP_Enter, KEY_ENTER, },
- { XK_KP_F1, KEY_F1, },
- { XK_KP_F2, KEY_F2, },
- { XK_KP_F3, KEY_F3, },
- { XK_KP_F4, KEY_F4, },
- { XK_KP_Home, KEY_HOME, },
- { XK_KP_Left, KEY_LEFT, },
- { XK_KP_Up, KEY_UP, },
- { XK_KP_Right, KEY_RIGHT, },
- { XK_KP_Down, KEY_DOWN, },
- { XK_KP_Page_Up, KEY_PAGEUP, },
- { XK_KP_Page_Down, KEY_PAGEDOWN, },
- { XK_KP_End, KEY_END, },
- { XK_KP_Begin, KEY_HOME, },
- { XK_KP_Insert, KEY_INSERT, },
- { XK_KP_Delete, KEY_DELETE, },
- { XK_F1, KEY_F1, },
- { XK_F2, KEY_F2, },
- { XK_F3, KEY_F3, },
- { XK_F4, KEY_F4, },
- { XK_F5, KEY_F5, },
- { XK_F6, KEY_F6, },
- { XK_F7, KEY_F7, },
- { XK_F8, KEY_F8, },
- { XK_F9, KEY_F9, },
- { XK_F10, KEY_F10, },
- { XK_F11, KEY_F11, },
- { XK_F12, KEY_F12, },
- { XK_Delete, KEY_DELETE, },
- /* XFree86 extensions */
- { XF86XK_AudioLowerVolume, KEY_VOLUME_DOWN, },
- { XF86XK_AudioMute, KEY_VOLUME_MUTE, },
- { XF86XK_AudioRaiseVolume, KEY_VOLUME_UP, },
- { XF86XK_AudioPlay, KEY_MEDIA_PLAY_PAUSE, },
- { XF86XK_AudioStop, KEY_MEDIA_STOP, },
- { XF86XK_AudioPrev, KEY_MEDIA_PREV_TRACK, },
- { XF86XK_AudioNext, KEY_MEDIA_NEXT_TRACK, },
- { XF86XK_HomePage, KEY_BROWSER_HOME, },
- { XF86XK_Search, KEY_BROWSER_SEARCH, },
- { XF86XK_Back, KEY_BROWSER_BACK, },
- { XF86XK_Forward, KEY_BROWSER_FORWARD, },
- { XF86XK_Stop, KEY_BROWSER_STOP, },
- { XF86XK_Refresh, KEY_BROWSER_REFRESH, },
- { XF86XK_Favorites, KEY_BROWSER_FAVORITES, },
- { XF86XK_AudioPause, KEY_MEDIA_PLAY_PAUSE, },
- { XF86XK_Reload, KEY_BROWSER_REFRESH, },
- };
- /* X11 and VLC both use the ASCII code for printable ASCII characters,
- * except for space (only X11). */
- if (sym == XK_space)
- return KEY_SPACE;
- if (isascii(sym))
- return sym;
- /* Special keys */
- res = bsearch (&sym, tab, sizeof (tab) / sizeof (tab[0]), sizeof (tab[0]),
- keysymcmp);
- if (res != NULL)
- return res->vlc;
- return KEY_UNSET;
- }
- /**
- * Process an X11 event, convert into VLC hotkey event if applicable.
- *
- * @param ctx key handler created with CreateKeyHandler()
- * @param ev XCB event to process
- * @return 0 if the event was handled and free()'d, non-zero otherwise
- */
- int ProcessKeyEvent (key_handler_t *ctx, xcb_generic_event_t *ev)
- {
- assert (ctx);
- switch (ev->response_type & 0x7f)
- {
- case XCB_KEY_PRESS:
- {
- xcb_key_press_event_t *e = (xcb_key_press_event_t *)ev;
- xcb_keysym_t sym = xcb_key_press_lookup_keysym (ctx->syms, e, 0);
- int vk = ConvertKeySym (sym);
- if (vk == KEY_UNSET)
- break;
- if (e->state & XCB_MOD_MASK_SHIFT)
- vk |= KEY_MODIFIER_SHIFT;
- if (e->state & XCB_MOD_MASK_CONTROL)
- vk |= KEY_MODIFIER_CTRL;
- if (e->state & XCB_MOD_MASK_1)
- vk |= KEY_MODIFIER_ALT;
- if (e->state & XCB_MOD_MASK_4)
- vk |= KEY_MODIFIER_COMMAND;
- var_SetInteger (ctx->obj->p_libvlc, "key-pressed", vk);
- break;
- }
- case XCB_KEY_RELEASE:
- break;
- /*TODO: key mappings update*/
- default:
- return -1;
- }
- free (ev);
- return 0;
- }