| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #ifndef GUAC_RDP_KEYBOARD_H |
| #define GUAC_RDP_KEYBOARD_H |
| |
| #include "keymap.h" |
| |
| #include <freerdp/freerdp.h> |
| #include <guacamole/client.h> |
| |
| /** |
| * The maximum number of distinct keysyms that any particular keyboard may support. |
| */ |
| #define GUAC_RDP_KEYBOARD_MAX_KEYSYMS 1024 |
| |
| /** |
| * The maximum number of unique modifier variations that any particular keysym |
| * may define. For example, on a US English keyboard, an uppercase "A" may be |
| * typed by pressing Shift+A with Caps Lock unset, or by pressing A with Caps |
| * Lock set (two variations). |
| */ |
| #define GUAC_RDP_KEY_MAX_DEFINITIONS 4 |
| |
| /** |
| * All possible sources of RDP key events tracked by guac_rdp_keyboard. |
| */ |
| typedef enum guac_rdp_key_source { |
| |
| /** |
| * The key event was received directly from the Guacamole client via a |
| * "key" instruction. |
| */ |
| GUAC_RDP_KEY_SOURCE_CLIENT = 0, |
| |
| /** |
| * The key event is being synthesized internally within the RDP support. |
| */ |
| GUAC_RDP_KEY_SOURCE_SYNTHETIC = 1 |
| |
| } guac_rdp_key_source; |
| |
| /** |
| * A representation of a single key within the overall local keyboard, |
| * including the definition of that key within the RDP server's keymap and |
| * whether the key is currently pressed locally. |
| */ |
| typedef struct guac_rdp_key { |
| |
| /** |
| * All definitions of this key within the RDP server's keymap (keyboard |
| * layout). Each definition describes which scancode corresponds to this |
| * key from the perspective of the RDP server, as well as which other |
| * scancodes must be pressed/released for this key to have the desired |
| * meaning. |
| */ |
| const guac_rdp_keysym_desc* definitions[GUAC_RDP_KEY_MAX_DEFINITIONS]; |
| |
| /** |
| * The number of definitions within the definitions array. If this key does |
| * not exist within the RDP server's keymap, this will be 0. |
| */ |
| int num_definitions; |
| |
| /** |
| * The definition of this key that is currently pressed. If this key is not |
| * currently pressed, this will be NULL. |
| */ |
| const guac_rdp_keysym_desc* pressed; |
| |
| /** |
| * Whether this key is currently pressed by the user, and is included among |
| * the total tracked by user_pressed_keys within guac_rdp_keyboard. |
| */ |
| int user_pressed; |
| |
| } guac_rdp_key; |
| |
| /** |
| * The current keyboard state of an RDP session. |
| */ |
| typedef struct guac_rdp_keyboard { |
| |
| /** |
| * The guac_client associated with the RDP session whose keyboard state is |
| * being managed by this guac_rdp_keyboard. |
| */ |
| guac_client* client; |
| |
| /** |
| * The local state of all known lock keys, as a bitwise OR of all RDP lock |
| * key flags. Legal flags are KBD_SYNC_SCROLL_LOCK, KBD_SYNC_NUM_LOCK, |
| * KBD_SYNC_CAPS_LOCK, and KBD_SYNC_KANA_LOCK. |
| */ |
| UINT32 lock_flags; |
| |
| /** |
| * Whether the states of remote lock keys (Caps lock, Num lock, etc.) have |
| * been synchronized with local lock key states. |
| */ |
| int synchronized; |
| |
| /** |
| * The number of keys stored within the keys array. |
| */ |
| unsigned int num_keys; |
| |
| /** |
| * The local state of all keys, as well as the necessary information to |
| * translate received keysyms into scancodes or sequences of scancodes for |
| * RDP. The state of each key is updated based on received Guacamole key |
| * events, while the information describing the behavior and scancode |
| * mapping of each key is populated based on an associated keymap. |
| * |
| * Keys within this array are in arbitrary order. |
| */ |
| guac_rdp_key keys[GUAC_RDP_KEYBOARD_MAX_KEYSYMS]; |
| |
| /** |
| * Lookup table into the overall keys array, locating the guac_rdp_key |
| * associated with any particular keysym. If a keysym has no corresponding |
| * guac_rdp_key within the keys array, its entry within this lookuptable |
| * will be NULL. |
| * |
| * The index of the key for a given keysym is determined based on a |
| * simple transformation of the keysym itself. Keysyms between 0x0000 and |
| * 0xFFFF inclusive are mapped to 0x00000 through 0x0FFFF, while keysyms |
| * between 0x1000000 and 0x100FFFF inclusive (keysyms which are derived |
| * from Unicode) are mapped to 0x10000 through 0x1FFFF. |
| */ |
| guac_rdp_key* keys_by_keysym[0x20000]; |
| |
| /** |
| * The total number of keys that the user of the connection is currently |
| * holding down. This value indicates only the client-side keyboard state. |
| * It DOES NOT indicate the number of keys currently pressed within the RDP |
| * server. |
| */ |
| int user_pressed_keys; |
| |
| } guac_rdp_keyboard; |
| |
| /** |
| * Allocates a new guac_rdp_keyboard which manages the keyboard state of the |
| * RDP session associated with the given guac_client. Keyboard events will be |
| * dynamically translated from keysym to RDP scancode according to the provided |
| * keymap. The returned guac_rdp_keyboard must eventually be freed with |
| * guac_rdp_keyboard_free(). |
| * |
| * @param client |
| * The guac_client associated with the RDP session whose keyboard state is |
| * to be managed by the newly-allocated guac_rdp_keyboard. |
| * |
| * @param keymap |
| * The keymap which should be used to translate keyboard events. |
| * |
| * @return |
| * A newly-allocated guac_rdp_keyboard which manages the keyboard state |
| * for the RDP session associated given guac_client. |
| */ |
| guac_rdp_keyboard* guac_rdp_keyboard_alloc(guac_client* client, |
| const guac_rdp_keymap* keymap); |
| |
| /** |
| * Frees all memory allocated for the given guac_rdp_keyboard. The |
| * guac_rdp_keyboard must have been previously allocated via |
| * guac_rdp_keyboard_alloc(). |
| * |
| * @param keyboard |
| * The guac_rdp_keyboard instance which should be freed. |
| */ |
| void guac_rdp_keyboard_free(guac_rdp_keyboard* keyboard); |
| |
| /** |
| * Returns whether the given keysym is defined for the keyboard layout |
| * associated with the given keyboard. |
| * |
| * @param keyboard |
| * The guac_rdp_keyboard instance to check. |
| * |
| * @param keysym |
| * The keysym of the key being checked against the keyboard layout of the |
| * given keyboard. |
| * |
| * @return |
| * Non-zero if the key is explicitly defined within the keyboard layout of |
| * the given keyboard, zero otherwise. |
| */ |
| int guac_rdp_keyboard_is_defined(guac_rdp_keyboard* keyboard, int keysym); |
| |
| /** |
| * Returns whether the key having the given keysym is currently pressed. |
| * |
| * @param keyboard |
| * The guac_rdp_keyboard instance to check. |
| * |
| * @param keysym |
| * The keysym of the key being checked. |
| * |
| * @return |
| * Non-zero if the key is currently pressed, zero otherwise. |
| */ |
| int guac_rdp_keyboard_is_pressed(guac_rdp_keyboard* keyboard, int keysym); |
| |
| /** |
| * Returns the local state of all known modifier keys, as a bitwise OR of the |
| * modifier flags used by the keymaps. Alternative methods of producing the |
| * effect of certain modifiers, such as holding Ctrl+Alt for AltGr when a |
| * dedicated AltGr key is unavailable, are taken into account. |
| * |
| * @see GUAC_RDP_KEYMAP_MODIFIER_SHIFT |
| * @see GUAC_RDP_KEYMAP_MODIFIER_ALTGR |
| * |
| * @param keyboard |
| * The guac_rdp_keyboard associated with the current RDP session. |
| * |
| * @return |
| * The local state of all known modifier keys. |
| */ |
| unsigned int guac_rdp_keyboard_get_modifier_flags(guac_rdp_keyboard* keyboard); |
| |
| /** |
| * Updates the local state of the lock keys (such as Caps lock or Num lock), |
| * synchronizing the remote state of those keys if it is expected to differ. |
| * |
| * @param keyboard |
| * The guac_rdp_keyboard associated with the current RDP session. |
| * |
| * @param set_flags |
| * The lock key flags which should be set. Legal flags are |
| * KBD_SYNC_SCROLL_LOCK, KBD_SYNC_NUM_LOCK, KBD_SYNC_CAPS_LOCK, and |
| * KBD_SYNC_KANA_LOCK. |
| * |
| * @param clear_flags |
| * The lock key flags which should be cleared. Legal flags are |
| * KBD_SYNC_SCROLL_LOCK, KBD_SYNC_NUM_LOCK, KBD_SYNC_CAPS_LOCK, and |
| * KBD_SYNC_KANA_LOCK. |
| */ |
| void guac_rdp_keyboard_update_locks(guac_rdp_keyboard* keyboard, |
| unsigned int set_flags, unsigned int clear_flags); |
| |
| /** |
| * Updates the local state of the modifier keys (such as Shift or AltGr), |
| * synchronizing the remote state of those keys if it is expected to differ. |
| * Valid modifier flags are defined by keymap.h. |
| * |
| * @see GUAC_RDP_KEYMAP_MODIFIER_SHIFT |
| * @see GUAC_RDP_KEYMAP_MODIFIER_ALTGR |
| * |
| * @param keyboard |
| * The guac_rdp_keyboard associated with the current RDP session. |
| * |
| * @param set_flags |
| * The modifier key flags which should be set. |
| * |
| * @param clear_flags |
| * The modifier key flags which should be cleared. |
| */ |
| void guac_rdp_keyboard_update_modifiers(guac_rdp_keyboard* keyboard, |
| unsigned int set_flags, unsigned int clear_flags); |
| |
| /** |
| * Updates the local state of the given keysym, sending the key events required |
| * to replicate that state remotely (on the RDP server). The key events sent |
| * will depend on the current keymap. |
| * |
| * @param keyboard |
| * The guac_rdp_keyboard associated with the current RDP session. |
| * |
| * @param keysym |
| * The keysym being pressed or released. |
| * |
| * @param pressed |
| * Zero if the keysym is being released, non-zero otherwise. |
| * |
| * @param source |
| * The source of the key event represented by this call to |
| * guac_rdp_keyboard_update_keysym(). |
| * |
| * @return |
| * Zero if the keys were successfully sent, non-zero otherwise. |
| */ |
| int guac_rdp_keyboard_update_keysym(guac_rdp_keyboard* keyboard, |
| int keysym, int pressed, guac_rdp_key_source source); |
| |
| /** |
| * Releases all currently pressed keys, sending key release events to the RDP |
| * server as necessary. Lock states (Caps Lock, etc.) are not affected. |
| * |
| * @param keyboard |
| * The guac_rdp_keyboard associated with the current RDP session. |
| */ |
| void guac_rdp_keyboard_reset(guac_rdp_keyboard* keyboard); |
| |
| /** |
| * Callback which is invoked by FreeRDP when the RDP server reports changes to |
| * keyboard lock status using a Server Set Keyboard Indicators PDU. |
| * |
| * @param context |
| * The rdpContext associated with the current RDP session. |
| * |
| * @param flags |
| * The remote state of all lock keys, as a bitwise OR of all RDP lock key |
| * flags. Legal flags are KBD_SYNC_SCROLL_LOCK, KBD_SYNC_NUM_LOCK, |
| * KBD_SYNC_CAPS_LOCK, and KBD_SYNC_KANA_LOCK. |
| * |
| * @return |
| * TRUE if successful, FALSE otherwise. |
| */ |
| BOOL guac_rdp_keyboard_set_indicators(rdpContext* context, UINT16 flags); |
| |
| #endif |
| |