mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-24 16:39:43 +00:00
286 lines
7.5 KiB
C
286 lines
7.5 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2015 - Daniel De Matteis
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stddef.h>
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#include <string.h>
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#include <ctype.h>
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#include "../general.h"
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#include "input_keyboard.h"
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struct input_keyboard_line
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{
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char *buffer;
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size_t ptr;
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size_t size;
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/** Line complete callback.
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* Calls back after return is pressed with the completed line.
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* Line can be NULL.
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**/
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input_keyboard_line_complete_t cb;
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void *userdata;
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};
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static input_keyboard_line_t *g_keyboard_line;
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static input_keyboard_press_t g_keyboard_press_cb;
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static void *g_keyboard_press_data;
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static void input_keyboard_line_toggle_osk(bool enable)
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{
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settings_t *settings = config_get_ptr();
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if (!settings->osk.enable)
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return;
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if (enable)
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input_driver_ctl(RARCH_INPUT_CTL_SET_KEYBOARD_LINEFEED_ENABLED, NULL);
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else
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input_driver_ctl(RARCH_INPUT_CTL_UNSET_KEYBOARD_LINEFEED_ENABLED, NULL);
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}
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/**
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* input_keyboard_line_free:
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* @state : Input keyboard line handle.
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*
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* Frees input keyboard line handle.
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**/
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void input_keyboard_line_free(input_keyboard_line_t *state)
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{
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if (!state)
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return;
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free(state->buffer);
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free(state);
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input_keyboard_line_toggle_osk(false);
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}
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/**
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* input_keyboard_line_new:
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* @userdata : Userdata.
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* @cb : Callback function.
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*
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* Creates and initializes input keyboard line handle.
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* Also sets callback function for keyboard line handle
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* to provided callback @cb.
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*
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* Returns: keyboard handle on success, otherwise NULL.
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**/
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input_keyboard_line_t *input_keyboard_line_new(void *userdata,
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input_keyboard_line_complete_t cb)
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{
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input_keyboard_line_t *state = (input_keyboard_line_t*)
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calloc(1, sizeof(*state));
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if (!state)
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return NULL;
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state->cb = cb;
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state->userdata = userdata;
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input_keyboard_line_toggle_osk(true);
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return state;
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}
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/**
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* input_keyboard_line_event:
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* @state : Input keyboard line handle.
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* @character : Inputted character.
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*
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* Called on every keyboard character event.
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*
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* Returns: true (1) on success, otherwise false (0).
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**/
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bool input_keyboard_line_event(
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input_keyboard_line_t *state, uint32_t character)
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{
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char c = character >= 128 ? '?' : character;
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/* Treat extended chars as ? as we cannot support
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* printable characters for unicode stuff. */
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if (c == '\r' || c == '\n')
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{
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state->cb(state->userdata, state->buffer);
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return true;
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}
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if (c == '\b' || c == '\x7f') /* 0x7f is ASCII for del */
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{
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if (state->ptr)
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{
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memmove(state->buffer + state->ptr - 1, state->buffer + state->ptr,
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state->size - state->ptr + 1);
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state->ptr--;
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state->size--;
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}
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}
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else if (isprint((int)c))
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{
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/* Handle left/right here when suitable */
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char *newbuf = (char*)realloc(state->buffer, state->size + 2);
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if (!newbuf)
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return false;
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memmove(newbuf + state->ptr + 1,
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newbuf + state->ptr, state->size - state->ptr + 1);
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newbuf[state->ptr] = c;
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state->ptr++;
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state->size++;
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newbuf[state->size] = '\0';
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state->buffer = newbuf;
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}
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return false;
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}
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/**
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* input_keyboard_line_get_buffer:
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* @state : Input keyboard line handle.
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*
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* Gets the underlying buffer of the keyboard line.
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*
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* The underlying buffer can be reallocated at any time
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* (or be NULL), but the pointer to it remains constant
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* throughout the objects lifetime.
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*
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* Returns: pointer to string.
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**/
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const char **input_keyboard_line_get_buffer(const input_keyboard_line_t *state)
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{
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return (const char**)&state->buffer;
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}
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/**
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* input_keyboard_start_line:
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* @userdata : Userdata.
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* @cb : Line complete callback function.
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*
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* Sets function pointer for keyboard line handle.
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*
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* Returns: underlying buffer returned by
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* input_keyboard_line_get_buffer().
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**/
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const char **input_keyboard_start_line(void *userdata,
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input_keyboard_line_complete_t cb)
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{
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if (g_keyboard_line)
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input_keyboard_line_free(g_keyboard_line);
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g_keyboard_line = input_keyboard_line_new(userdata, cb);
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/* While reading keyboard line input, we have to block all hotkeys. */
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input_driver_keyboard_mapping_set_block(true);
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return input_keyboard_line_get_buffer(g_keyboard_line);
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}
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/**
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* input_keyboard_wait_keys:
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* @userdata : Userdata.
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* @cb : Callback function.
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*
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* Waits for keys to be pressed (used for binding keys in the menu).
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* Callback returns false when all polling is done.
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**/
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void input_keyboard_wait_keys(void *userdata, input_keyboard_press_t cb)
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{
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g_keyboard_press_cb = cb;
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g_keyboard_press_data = userdata;
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/* While waiting for input, we have to block all hotkeys. */
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input_driver_keyboard_mapping_set_block(true);
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}
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/**
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* input_keyboard_wait_keys_cancel:
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*
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* Cancels function callback set by input_keyboard_wait_keys().
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**/
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void input_keyboard_wait_keys_cancel(void)
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{
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g_keyboard_press_cb = NULL;
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g_keyboard_press_data = NULL;
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input_driver_keyboard_mapping_set_block(false);
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}
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/**
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* input_keyboard_event:
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* @down : Keycode was pressed down?
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* @code : Keycode.
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* @character : Character inputted.
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* @mod : TODO/FIXME: ???
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*
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* Keyboard event utils. Called by drivers when keyboard events are fired.
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* This interfaces with the global system driver struct and libretro callbacks.
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**/
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void input_keyboard_event(bool down, unsigned code,
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uint32_t character, uint16_t mod, unsigned device)
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{
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static bool deferred_wait_keys;
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rarch_system_info_t *system = rarch_system_info_get_ptr();
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if (deferred_wait_keys)
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{
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if (down)
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return;
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input_keyboard_wait_keys_cancel();
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deferred_wait_keys = false;
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}
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else if (g_keyboard_press_cb)
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{
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if (!down)
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return;
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if (code == RETROK_UNKNOWN)
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return;
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if (g_keyboard_press_cb(g_keyboard_press_data, code))
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return;
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deferred_wait_keys = true;
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}
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else if (g_keyboard_line)
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{
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if (!down)
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return;
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switch (device)
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{
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case RETRO_DEVICE_POINTER:
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if (!input_keyboard_line_event(g_keyboard_line, (code != 0x12d) ? (char)code : character))
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return;
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break;
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default:
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if (!input_keyboard_line_event(g_keyboard_line, character))
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return;
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break;
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}
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/* Line is complete, can free it now. */
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input_keyboard_line_free(g_keyboard_line);
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g_keyboard_line = NULL;
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/* Unblock all hotkeys. */
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input_driver_keyboard_mapping_set_block(false);
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}
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else if (system->key_event)
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system->key_event(down, code, character, mod);
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}
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