234 lines
7.0 KiB
C
234 lines
7.0 KiB
C
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#include "config.h"
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#include "client.h"
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#include "keyboard.h"
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#include "rdp.h"
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#include "rdp_keymap.h"
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#include <freerdp/freerdp.h>
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#include <freerdp/input.h>
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#include <guacamole/client.h>
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#include <pthread.h>
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#include <stdlib.h>
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/**
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* Loads all keysym/scancode mappings declared within the given keymap and its
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* parent keymap, if any. These mappings are stored within the given
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* guac_rdp_keyboard structure for future use in translating keysyms to the
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* scancodes required by RDP key events.
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*
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* @param keyboard
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* The guac_rdp_keyboard which should be initialized with the
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* keysym/scancode mapping defined in the given keymap.
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*
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* @param keymap
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* The keymap to use to populate the given client's keysym/scancode
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* mapping.
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*/
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static void __guac_rdp_keyboard_load_keymap(guac_rdp_keyboard* keyboard,
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const guac_rdp_keymap* keymap) {
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/* Get mapping */
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const guac_rdp_keysym_desc* mapping = keymap->mapping;
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/* If parent exists, load parent first */
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if (keymap->parent != NULL)
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__guac_rdp_keyboard_load_keymap(keyboard, keymap->parent);
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/* Log load */
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guac_client_log(keyboard->client, GUAC_LOG_INFO,
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"Loading keymap \"%s\"", keymap->name);
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/* Load mapping into keymap */
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while (mapping->keysym != 0) {
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/* Copy mapping */
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GUAC_RDP_KEYSYM_LOOKUP(keyboard->keymap, mapping->keysym) = *mapping;
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/* Next keysym */
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mapping++;
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}
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}
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guac_rdp_keyboard* guac_rdp_keyboard_alloc(guac_client* client,
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const guac_rdp_keymap* keymap) {
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guac_rdp_keyboard* keyboard = calloc(1, sizeof(guac_rdp_keyboard));
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keyboard->client = client;
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/* Load keymap into keyboard */
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__guac_rdp_keyboard_load_keymap(keyboard, keymap);
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return keyboard;
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}
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void guac_rdp_keyboard_free(guac_rdp_keyboard* keyboard) {
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free(keyboard);
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}
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int guac_rdp_keyboard_send_event(guac_rdp_keyboard* keyboard,
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int keysym, int pressed) {
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guac_client* client = keyboard->client;
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guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;
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/* If keysym can be in lookup table */
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if (GUAC_RDP_KEYSYM_STORABLE(keysym)) {
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/* Look up scancode mapping */
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const guac_rdp_keysym_desc* keysym_desc =
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&GUAC_RDP_KEYSYM_LOOKUP(keyboard->keymap, keysym);
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/* If defined, send event */
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if (keysym_desc->scancode != 0) {
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pthread_mutex_lock(&(rdp_client->rdp_lock));
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/* If defined, send any prerequesite keys that must be set */
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if (keysym_desc->set_keysyms != NULL)
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guac_rdp_keyboard_send_events(keyboard,
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keysym_desc->set_keysyms, 0, 1);
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/* If defined, release any keys that must be cleared */
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if (keysym_desc->clear_keysyms != NULL)
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guac_rdp_keyboard_send_events(keyboard,
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keysym_desc->clear_keysyms, 1, 0);
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/* Determine proper event flag for pressed state */
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int pressed_flags;
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if (pressed)
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pressed_flags = KBD_FLAGS_DOWN;
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else
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pressed_flags = KBD_FLAGS_RELEASE;
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/* Skip if not yet connected */
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freerdp* rdp_inst = rdp_client->rdp_inst;
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if (rdp_inst == NULL) {
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pthread_mutex_unlock(&(rdp_client->rdp_lock));
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return 0;
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}
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/* Send actual key */
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rdp_inst->input->KeyboardEvent(rdp_inst->input,
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keysym_desc->flags | pressed_flags,
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keysym_desc->scancode);
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/* If defined, release any keys that were originally released */
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if (keysym_desc->set_keysyms != NULL)
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guac_rdp_keyboard_send_events(keyboard,
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keysym_desc->set_keysyms, 0, 0);
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/* If defined, send any keys that were originally set */
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if (keysym_desc->clear_keysyms != NULL)
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guac_rdp_keyboard_send_events(keyboard,
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keysym_desc->clear_keysyms, 1, 1);
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pthread_mutex_unlock(&(rdp_client->rdp_lock));
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return 0;
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}
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}
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/* Fall back to unicode events if undefined inside current keymap */
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/* Only send when key pressed - Unicode events do not have
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* DOWN/RELEASE flags */
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if (pressed) {
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guac_client_log(client, GUAC_LOG_DEBUG,
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"Sending keysym 0x%x as Unicode", keysym);
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/* Translate keysym into codepoint */
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int codepoint;
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if (keysym <= 0xFF)
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codepoint = keysym;
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else if (keysym >= 0x1000000)
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codepoint = keysym & 0xFFFFFF;
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else {
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guac_client_log(client, GUAC_LOG_DEBUG,
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"Unmapped keysym has no equivalent unicode "
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"value: 0x%x", keysym);
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return 0;
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}
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pthread_mutex_lock(&(rdp_client->rdp_lock));
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/* Skip if not yet connected */
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freerdp* rdp_inst = rdp_client->rdp_inst;
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if (rdp_inst == NULL) {
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pthread_mutex_unlock(&(rdp_client->rdp_lock));
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return 0;
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}
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/* Send Unicode event */
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rdp_inst->input->UnicodeKeyboardEvent(
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rdp_inst->input,
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0, codepoint);
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pthread_mutex_unlock(&(rdp_client->rdp_lock));
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}
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return 0;
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}
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void guac_rdp_keyboard_send_events(guac_rdp_keyboard* keyboard,
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const int* keysym_string, int from, int to) {
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int keysym;
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/* Send all keysyms in string, NULL terminated */
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while ((keysym = *keysym_string) != 0) {
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/* Get current keysym state */
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int current_state =
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GUAC_RDP_KEYSYM_LOOKUP(keyboard->keysym_state, keysym);
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/* If key is currently in given state, send event for changing it to
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* specified "to" state */
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if (current_state == from)
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guac_rdp_keyboard_send_event(keyboard, *keysym_string, to);
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/* Next keysym */
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keysym_string++;
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}
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}
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int guac_rdp_keyboard_update_keysym(guac_rdp_keyboard* keyboard,
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int keysym, int pressed) {
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/* Update keysym state */
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if (GUAC_RDP_KEYSYM_STORABLE(keysym))
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GUAC_RDP_KEYSYM_LOOKUP(keyboard->keysym_state, keysym) = pressed;
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return guac_rdp_keyboard_send_event(keyboard, keysym, pressed);
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}
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