forked from KolibriOS/kolibrios
590 lines
14 KiB
C
590 lines
14 KiB
C
/* PDCurses */
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#include <curspriv.h>
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/*man-start**************************************************************
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getch
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-----
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### Synopsis
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int getch(void);
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int wgetch(WINDOW *win);
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int mvgetch(int y, int x);
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int mvwgetch(WINDOW *win, int y, int x);
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int ungetch(int ch);
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int flushinp(void);
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int get_wch(wint_t *wch);
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int wget_wch(WINDOW *win, wint_t *wch);
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int mvget_wch(int y, int x, wint_t *wch);
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int mvwget_wch(WINDOW *win, int y, int x, wint_t *wch);
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int unget_wch(const wchar_t wch);
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unsigned long PDC_get_key_modifiers(void);
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int PDC_return_key_modifiers(bool flag);
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### Description
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With the getch(), wgetch(), mvgetch(), and mvwgetch() functions, a
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character is read from the terminal associated with the window. In
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nodelay mode, if there is no input waiting, the value ERR is
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returned. In delay mode, the program will hang until the system
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passes text through to the program. Depending on the setting of
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cbreak(), this will be after one character or after the first
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newline. Unless noecho() has been set, the character will also be
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echoed into the designated window.
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If keypad() is TRUE, and a function key is pressed, the token for
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that function key will be returned instead of the raw characters.
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Possible function keys are defined in <curses.h> with integers
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beginning with 0401, whose names begin with KEY_.
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If nodelay(win, TRUE) has been called on the window and no input is
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waiting, the value ERR is returned.
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ungetch() places ch back onto the input queue to be returned by the
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next call to wgetch().
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flushinp() throws away any type-ahead that has been typed by the user
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and has not yet been read by the program.
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wget_wch() is the wide-character version of wgetch(), available when
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PDCurses is built with the PDC_WIDE option. It takes a pointer to a
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wint_t rather than returning the key as an int, and instead returns
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KEY_CODE_YES if the key is a function key. Otherwise, it returns OK
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or ERR. It's important to check for KEY_CODE_YES, since regular wide
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characters can have the same values as function key codes.
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unget_wch() puts a wide character on the input queue.
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PDC_get_key_modifiers() returns the keyboard modifiers (shift,
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control, alt, numlock) effective at the time of the last getch()
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call. Use the macros PDC_KEY_MODIFIER_* to determine which
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modifier(s) were set. PDC_return_key_modifiers() tells getch() to
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return modifier keys pressed alone as keystrokes (KEY_ALT_L, etc.).
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These may not work on all platforms.
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NOTE: getch() and ungetch() are implemented as macros, to avoid
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conflict with many DOS compiler's runtime libraries.
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### Return Value
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These functions return ERR or the value of the character, meta
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character or function key token.
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### Portability
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X/Open ncurses NetBSD
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getch Y Y Y
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wgetch Y Y Y
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mvgetch Y Y Y
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mvwgetch Y Y Y
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ungetch Y Y Y
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flushinp Y Y Y
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get_wch Y Y Y
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wget_wch Y Y Y
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mvget_wch Y Y Y
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mvwget_wch Y Y Y
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unget_wch Y Y Y
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PDC_get_key_modifiers - - -
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**man-end****************************************************************/
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#include <stdlib.h>
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static int _get_box(int *y_start, int *y_end, int *x_start, int *x_end)
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{
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int start, end;
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if (SP->sel_start < SP->sel_end)
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{
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start = SP->sel_start;
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end = SP->sel_end;
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}
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else
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{
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start = SP->sel_end;
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end = SP->sel_start;
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}
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*y_start = start / COLS;
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*x_start = start % COLS;
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*y_end = end / COLS;
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*x_end = end % COLS;
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return (end - start) + (*y_end - *y_start);
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}
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static void _highlight(void)
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{
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int i, j, y_start, y_end, x_start, x_end;
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if (-1 == SP->sel_start)
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return;
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_get_box(&y_start, &y_end, &x_start, &x_end);
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for (j = y_start; j <= y_end; j++)
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for (i = (j == y_start ? x_start : 0);
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i < (j == y_end ? x_end : COLS); i++)
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curscr->_y[j][i] ^= A_REVERSE;
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wrefresh(curscr);
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}
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static void _copy(void)
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{
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#ifdef PDC_WIDE
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wchar_t *wtmp;
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# define TMP wtmp
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# define MASK A_CHARTEXT
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#else
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# define TMP tmp
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# define MASK 0xff
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#endif
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char *tmp;
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long pos;
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int i, j, y_start, y_end, x_start, x_end, len;
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if (-1 == SP->sel_start)
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return;
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len = _get_box(&y_start, &y_end, &x_start, &x_end);
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if (!len)
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return;
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#ifdef PDC_WIDE
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wtmp = malloc((len + 1) * sizeof(wchar_t));
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len *= 3;
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#endif
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tmp = malloc(len + 1);
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for (j = y_start, pos = 0; j <= y_end; j++)
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{
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for (i = (j == y_start ? x_start : 0);
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i < (j == y_end ? x_end : COLS); i++)
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TMP[pos++] = curscr->_y[j][i] & MASK;
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while (y_start != y_end && pos > 0 && TMP[pos - 1] == 32)
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pos--;
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if (j < y_end)
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TMP[pos++] = 10;
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}
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TMP[pos] = 0;
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#ifdef PDC_WIDE
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pos = PDC_wcstombs(tmp, wtmp, len);
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#endif
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PDC_setclipboard(tmp, pos);
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free(tmp);
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#ifdef PDC_WIDE
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free(wtmp);
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#endif
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}
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static int _paste(void)
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{
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#ifdef PDC_WIDE
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wchar_t *wpaste;
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# define PASTE wpaste
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#else
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# define PASTE paste
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#endif
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char *paste;
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long len, newmax;
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int key;
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key = PDC_getclipboard(&paste, &len);
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if (PDC_CLIP_SUCCESS != key || !len)
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return -1;
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#ifdef PDC_WIDE
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wpaste = malloc(len * sizeof(wchar_t));
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len = PDC_mbstowcs(wpaste, paste, len);
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#endif
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newmax = len + SP->c_ungind;
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if (newmax > SP->c_ungmax)
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{
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SP->c_ungch = realloc(SP->c_ungch, newmax * sizeof(int));
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if (!SP->c_ungch)
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return -1;
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SP->c_ungmax = newmax;
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}
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while (len > 1)
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PDC_ungetch(PASTE[--len]);
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key = *PASTE;
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#ifdef PDC_WIDE
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free(wpaste);
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#endif
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PDC_freeclipboard(paste);
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SP->key_modifiers = 0;
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return key;
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}
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static int _mouse_key(void)
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{
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int i, key = KEY_MOUSE, changes = SP->mouse_status.changes;
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unsigned long mbe = SP->_trap_mbe;
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/* Selection highlighting? */
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if ((!mbe || SP->mouse_status.button[0] & BUTTON_SHIFT) && changes & 1)
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{
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i = SP->mouse_status.y * COLS + SP->mouse_status.x;
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switch (SP->mouse_status.button[0] & BUTTON_ACTION_MASK)
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{
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case BUTTON_PRESSED:
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_highlight();
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SP->sel_start = SP->sel_end = i;
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return -1;
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case BUTTON_MOVED:
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_highlight();
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SP->sel_end = i;
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_highlight();
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return -1;
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case BUTTON_RELEASED:
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_copy();
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return -1;
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}
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}
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else if ((!mbe || SP->mouse_status.button[1] & BUTTON_SHIFT) &&
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changes & 2 && (SP->mouse_status.button[1] &
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BUTTON_ACTION_MASK) == BUTTON_CLICKED)
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{
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SP->key_code = FALSE;
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return _paste();
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}
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/* Filter unwanted mouse events */
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for (i = 0; i < 3; i++)
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{
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if (changes & (1 << i))
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{
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int shf = i * 5;
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short button = SP->mouse_status.button[i] & BUTTON_ACTION_MASK;
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if ( (!(mbe & (BUTTON1_PRESSED << shf)) &&
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(button == BUTTON_PRESSED))
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|| (!(mbe & (BUTTON1_CLICKED << shf)) &&
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(button == BUTTON_CLICKED))
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|| (!(mbe & (BUTTON1_DOUBLE_CLICKED << shf)) &&
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(button == BUTTON_DOUBLE_CLICKED))
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|| (!(mbe & (BUTTON1_MOVED << shf)) &&
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(button == BUTTON_MOVED))
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|| (!(mbe & (BUTTON1_RELEASED << shf)) &&
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(button == BUTTON_RELEASED))
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)
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SP->mouse_status.changes ^= (1 << i);
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}
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}
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if (changes & PDC_MOUSE_MOVED)
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{
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if (!(mbe & (BUTTON1_MOVED|BUTTON2_MOVED|BUTTON3_MOVED)))
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SP->mouse_status.changes ^= PDC_MOUSE_MOVED;
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}
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if (changes & (PDC_MOUSE_WHEEL_UP|PDC_MOUSE_WHEEL_DOWN))
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{
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if (!(mbe & MOUSE_WHEEL_SCROLL))
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SP->mouse_status.changes &=
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~(PDC_MOUSE_WHEEL_UP|PDC_MOUSE_WHEEL_DOWN);
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}
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if (!changes)
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return -1;
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/* Check for click in slk area */
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i = PDC_mouse_in_slk(SP->mouse_status.y, SP->mouse_status.x);
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if (i)
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{
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if (SP->mouse_status.button[0] & (BUTTON_PRESSED|BUTTON_CLICKED))
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key = KEY_F(i);
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else
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key = -1;
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}
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return key;
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}
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int wgetch(WINDOW *win)
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{
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int key, waitcount;
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PDC_LOG(("wgetch() - called\n"));
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if (!win || !SP)
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return ERR;
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waitcount = 0;
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/* set the number of 1/20th second napms() calls */
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if (SP->delaytenths)
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waitcount = 2 * SP->delaytenths;
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else
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if (win->_delayms)
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{
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/* Can't really do millisecond intervals, so delay in
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1/20ths of a second (50ms) */
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waitcount = win->_delayms / 50;
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if (!waitcount)
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waitcount = 1;
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}
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/* refresh window when wgetch is called if there have been changes
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to it and it is not a pad */
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if (!(win->_flags & _PAD) && ((!win->_leaveit &&
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(win->_begx + win->_curx != SP->curscol ||
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win->_begy + win->_cury != SP->cursrow)) || is_wintouched(win)))
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wrefresh(win);
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/* if ungotten char exists, remove and return it */
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if (SP->c_ungind)
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return SP->c_ungch[--(SP->c_ungind)];
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/* if normal and data in buffer */
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if ((!SP->raw_inp && !SP->cbreak) && (SP->c_gindex < SP->c_pindex))
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return SP->c_buffer[SP->c_gindex++];
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/* prepare to buffer data */
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SP->c_pindex = 0;
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SP->c_gindex = 0;
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/* to get here, no keys are buffered. go and get one. */
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for (;;) /* loop for any buffering */
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{
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/* is there a keystroke ready? */
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if (!PDC_check_key())
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{
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/* if not, handle timeout() and halfdelay() */
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if (SP->delaytenths || win->_delayms)
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{
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if (!waitcount)
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return ERR;
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waitcount--;
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}
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else
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if (win->_nodelay)
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return ERR;
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napms(50); /* sleep for 1/20th second */
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continue; /* then check again */
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}
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/* if there is, fetch it */
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key = PDC_get_key();
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/* copy or paste? */
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if (SP->key_modifiers & PDC_KEY_MODIFIER_SHIFT)
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{
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if (0x03 == key)
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{
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_copy();
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continue;
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}
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else if (0x16 == key)
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key = _paste();
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}
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/* filter mouse events; translate mouse clicks in the slk
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area to function keys */
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if (SP->key_code && key == KEY_MOUSE)
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key = _mouse_key();
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/* filter special keys if not in keypad mode */
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if (SP->key_code && !win->_use_keypad)
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key = -1;
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/* unwanted key? loop back */
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if (key == -1)
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continue;
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_highlight();
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SP->sel_start = SP->sel_end = -1;
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/* translate CR */
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if (key == '\r' && SP->autocr && !SP->raw_inp)
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key = '\n';
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/* if echo is enabled */
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if (SP->echo && !SP->key_code)
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{
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waddch(win, key);
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wrefresh(win);
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}
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/* if no buffering */
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if (SP->raw_inp || SP->cbreak)
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return key;
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/* if no overflow, put data in buffer */
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if (key == '\b')
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{
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if (SP->c_pindex > SP->c_gindex)
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SP->c_pindex--;
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}
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else
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if (SP->c_pindex < _INBUFSIZ - 2)
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SP->c_buffer[SP->c_pindex++] = key;
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/* if we got a line */
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if (key == '\n' || key == '\r')
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return SP->c_buffer[SP->c_gindex++];
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}
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}
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int mvgetch(int y, int x)
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{
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PDC_LOG(("mvgetch() - called\n"));
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if (move(y, x) == ERR)
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return ERR;
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return wgetch(stdscr);
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}
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int mvwgetch(WINDOW *win, int y, int x)
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{
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PDC_LOG(("mvwgetch() - called\n"));
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if (wmove(win, y, x) == ERR)
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return ERR;
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return wgetch(win);
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}
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int PDC_ungetch(int ch)
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{
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PDC_LOG(("ungetch() - called\n"));
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if (SP->c_ungind >= SP->c_ungmax) /* pushback stack full */
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return ERR;
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SP->c_ungch[SP->c_ungind++] = ch;
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return OK;
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}
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int flushinp(void)
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{
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PDC_LOG(("flushinp() - called\n"));
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if (!SP)
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return ERR;
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PDC_flushinp();
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SP->c_gindex = 1; /* set indices to kill buffer */
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SP->c_pindex = 0;
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SP->c_ungind = 0; /* clear SP->c_ungch array */
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return OK;
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}
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unsigned long PDC_get_key_modifiers(void)
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{
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PDC_LOG(("PDC_get_key_modifiers() - called\n"));
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if (!SP)
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return ERR;
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return SP->key_modifiers;
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}
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int PDC_return_key_modifiers(bool flag)
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{
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PDC_LOG(("PDC_return_key_modifiers() - called\n"));
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if (!SP)
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return ERR;
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SP->return_key_modifiers = flag;
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return PDC_modifiers_set();
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}
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#ifdef PDC_WIDE
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int wget_wch(WINDOW *win, wint_t *wch)
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{
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int key;
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PDC_LOG(("wget_wch() - called\n"));
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if (!wch)
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return ERR;
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key = wgetch(win);
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if (key == ERR)
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return ERR;
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*wch = key;
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return SP->key_code ? KEY_CODE_YES : OK;
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}
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int get_wch(wint_t *wch)
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{
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PDC_LOG(("get_wch() - called\n"));
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return wget_wch(stdscr, wch);
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}
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int mvget_wch(int y, int x, wint_t *wch)
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{
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PDC_LOG(("mvget_wch() - called\n"));
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if (move(y, x) == ERR)
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|
return ERR;
|
|
|
|
return wget_wch(stdscr, wch);
|
|
}
|
|
|
|
int mvwget_wch(WINDOW *win, int y, int x, wint_t *wch)
|
|
{
|
|
PDC_LOG(("mvwget_wch() - called\n"));
|
|
|
|
if (wmove(win, y, x) == ERR)
|
|
return ERR;
|
|
|
|
return wget_wch(win, wch);
|
|
}
|
|
|
|
int unget_wch(const wchar_t wch)
|
|
{
|
|
return PDC_ungetch(wch);
|
|
}
|
|
#endif
|