selection.c revision a352def21a642133758b868c71bee12ab34ad5c5
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * linux/drivers/char/selection.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This module exports the functions: 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 'int set_selection(struct tiocl_selection __user *, struct tty_struct *)' 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 'void clear_selection(void)' 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 'int paste_selection(struct tty_struct *)' 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 'int sel_loadlut(char __user *)' 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Now that /dev/vcs exists, most of this can disappear again. 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tty.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/sched.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt#include <linux/kbd_kern.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/vt_kern.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/consolemap.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/selection.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tiocl.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/console.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Don't take this from <ctype.h>: 011-015 on the screen aren't spaces */ 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define isspace(c) ((c) == ' ') 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsextern void poke_blanked_console(void); 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Variables for selection control. */ 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Use a dynamic buffer, instead of static (Dec 1994) */ 37ca9bda00b4aafc42cd3d1b9d32934463e2993b4cAlan Coxstruct vc_data *sel_cons; /* must not be deallocated */ 38759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardtstatic int use_unicode; 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic volatile int sel_start = -1; /* cleared by clear_selection */ 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int sel_end; 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int sel_buffer_lth; 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic char *sel_buffer; 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* clear_selection, highlight and highlight_pointer can be called 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds from interrupt (via scrollback/front) */ 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* set reverse video on characters s-e of console with selection. */ 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void highlight(const int s, const int e) 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds invert_screen(sel_cons, s, e-s+2, 1); 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* use complementary color to show the pointer */ 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void highlight_pointer(const int where) 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds complement_pos(sel_cons, where); 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 59759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardtstatic u16 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssel_pos(int n) 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 62759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt return inverse_translate(sel_cons, screen_glyph(sel_cons, n), 63759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt use_unicode); 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* remove the current selection highlight, if any, 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds from the console holding the selection. */ 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsclear_selection(void) { 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds highlight_pointer(-1); /* hide the pointer */ 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sel_start != -1) { 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds highlight(sel_start, sel_end); 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sel_start = -1; 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * User settable table: what characters are to be considered alphabetic? 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 256 bits 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u32 inwordLut[8]={ 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00000000, /* control chars */ 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03FF0000, /* digits */ 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x87FFFFFE, /* uppercase and '_' */ 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07FFFFFE, /* lowercase */ 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00000000, 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00000000, 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xFF7FFFFF, /* latin-1 accented letters, not multiplication sign */ 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xFF7FFFFF /* latin-1 accented letters, not division sign */ 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 92759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardtstatic inline int inword(const u16 c) { 93759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt return c > 0xff || (( inwordLut[c>>5] >> (c & 0x1F) ) & 1); 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* set inwordLut contents. Invoked by ioctl(). */ 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint sel_loadlut(char __user *p) 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return copy_from_user(inwordLut, (u32 __user *)(p+4), 32) ? -EFAULT : 0; 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* does screen address p correspond to character at LH/RH edge of screen? */ 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int atedge(const int p, int size_row) 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (!(p % size_row) || !((p + 2) % size_row)); 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* constrain v such that v <= u */ 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline unsigned short limit(const unsigned short v, const unsigned short u) 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (v > u) ? u : v; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 114759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt/* stores the char in UTF8 and returns the number of bytes used (1-3) */ 115759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardtstatic int store_utf8(u16 c, char *p) 116759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt{ 117759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt if (c < 0x80) { 118759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt /* 0******* */ 119759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt p[0] = c; 120759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt return 1; 121759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt } else if (c < 0x800) { 122759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt /* 110***** 10****** */ 123759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt p[0] = 0xc0 | (c >> 6); 124759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt p[1] = 0x80 | (c & 0x3f); 125759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt return 2; 126759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt } else { 127759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt /* 1110**** 10****** 10****** */ 128759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt p[0] = 0xe0 | (c >> 12); 129759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt p[1] = 0x80 | ((c >> 6) & 0x3f); 130759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt p[2] = 0x80 | (c & 0x3f); 131759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt return 3; 132759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt } 133759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt} 134759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* set the current selection. Invoked by ioctl() or by kernel code. */ 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint set_selection(const struct tiocl_selection __user *sel, struct tty_struct *tty) 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct vc_data *vc = vc_cons[fg_console].d; 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int sel_mode, new_sel_start, new_sel_end, spc; 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *bp, *obp; 141759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt int i, ps, pe, multiplier; 142759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt u16 c; 143759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt struct kbd_struct *kbd = kbd_table + fg_console; 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds poke_blanked_console(); 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { unsigned short xs, ys, xe, ye; 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!access_ok(VERIFY_READ, sel, sizeof(*sel))) 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __get_user(xs, &sel->xs); 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __get_user(ys, &sel->ys); 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __get_user(xe, &sel->xe); 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __get_user(ye, &sel->ye); 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __get_user(sel_mode, &sel->sel_mode); 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xs--; ys--; xe--; ye--; 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xs = limit(xs, vc->vc_cols - 1); 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ys = limit(ys, vc->vc_rows - 1); 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xe = limit(xe, vc->vc_cols - 1); 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ye = limit(ye, vc->vc_rows - 1); 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ps = ys * vc->vc_size_row + (xs << 1); 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pe = ye * vc->vc_size_row + (xe << 1); 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sel_mode == TIOCL_SELCLEAR) { 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* useful for screendump without selection highlights */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_selection(); 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mouse_reporting() && (sel_mode & TIOCL_SELMOUSEREPORT)) { 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mouse_report(tty, sel_mode & TIOCL_SELBUTTONMASK, xs, ys); 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ps > pe) /* make sel_start <= sel_end */ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tmp = ps; 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ps = pe; 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pe = tmp; 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sel_cons != vc_cons[fg_console].d) { 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_selection(); 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sel_cons = vc_cons[fg_console].d; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 187759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt use_unicode = kbd && kbd->kbdmode == VC_UNICODE; 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (sel_mode) 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TIOCL_SELCHAR: /* character-by-character selection */ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_sel_start = ps; 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_sel_end = pe; 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TIOCL_SELWORD: /* word-by-word selection */ 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spc = isspace(sel_pos(ps)); 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (new_sel_start = ps; ; ps -= 2) 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((spc && !isspace(sel_pos(ps))) || 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (!spc && !inword(sel_pos(ps)))) 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_sel_start = ps; 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(ps % vc->vc_size_row)) 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spc = isspace(sel_pos(pe)); 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (new_sel_end = pe; ; pe += 2) 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((spc && !isspace(sel_pos(pe))) || 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (!spc && !inword(sel_pos(pe)))) 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_sel_end = pe; 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!((pe + 2) % vc->vc_size_row)) 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TIOCL_SELLINE: /* line-by-line selection */ 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_sel_start = ps - ps % vc->vc_size_row; 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_sel_end = pe + vc->vc_size_row 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds - pe % vc->vc_size_row - 2; 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TIOCL_SELPOINTER: 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds highlight_pointer(pe); 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* remove the pointer */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds highlight_pointer(-1); 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* select to end of line if on trailing space */ 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_sel_end > new_sel_start && 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds !atedge(new_sel_end, vc->vc_size_row) && 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isspace(sel_pos(new_sel_end))) { 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (pe = new_sel_end + 2; ; pe += 2) 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!isspace(sel_pos(pe)) || 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atedge(pe, vc->vc_size_row)) 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isspace(sel_pos(pe))) 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_sel_end = pe; 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sel_start == -1) /* no current selection */ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds highlight(new_sel_start, new_sel_end); 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (new_sel_start == sel_start) 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_sel_end == sel_end) /* no action required */ 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (new_sel_end > sel_end) /* extend to right */ 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds highlight(sel_end + 2, new_sel_end); 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else /* contract from right */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds highlight(new_sel_end + 2, sel_end); 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (new_sel_end == sel_end) 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_sel_start < sel_start) /* extend to left */ 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds highlight(new_sel_start, sel_start - 2); 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else /* contract from left */ 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds highlight(sel_start, new_sel_start - 2); 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else /* some other case; start selection from scratch */ 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_selection(); 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds highlight(new_sel_start, new_sel_end); 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sel_start = new_sel_start; 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sel_end = new_sel_end; 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allocate a new buffer before freeing the old one ... */ 270759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt multiplier = use_unicode ? 3 : 1; /* chars can take up to 3 bytes */ 271759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt bp = kmalloc((sel_end-sel_start)/2*multiplier+1, GFP_KERNEL); 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bp) { 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_WARNING "selection: kmalloc() failed\n"); 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_selection(); 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 277735d5661d5c5f023a78fbe68e771e261040ff1b7Jesper Juhl kfree(sel_buffer); 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sel_buffer = bp; 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds obp = bp; 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = sel_start; i <= sel_end; i += 2) { 282759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt c = sel_pos(i); 283759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt if (use_unicode) 284759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt bp += store_utf8(c, bp); 285759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt else 286759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt *bp++ = c; 287759448f459234bfcf34b82471f0dba77a9aca498Jan Engelhardt if (!isspace(c)) 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds obp = bp; 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (! ((i + 2) % vc->vc_size_row)) { 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* strip trailing blanks from line and add newline, 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unless non-space at end of line. */ 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (obp != bp) { 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bp = obp; 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *bp++ = '\r'; 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds obp = bp; 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sel_buffer_lth = bp - sel_buffer; 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Insert the contents of the selection buffer into the 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * queue of the tty associated with the current console. 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Invoked by ioctl(). 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint paste_selection(struct tty_struct *tty) 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct vc_data *vc = (struct vc_data *)tty->driver_data; 31033f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox int pasted = 0; 31133f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox unsigned int count; 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tty_ldisc *ld; 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds acquire_console_sem(); 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds poke_blanked_console(); 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds release_console_sem(); 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ld = tty_ldisc_ref_wait(tty); 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&vc->paste_wait, &wait); 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (sel_buffer && sel_buffer_lth > pasted) { 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_INTERRUPTIBLE); 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (test_bit(TTY_THROTTLED, &tty->flags)) { 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count = sel_buffer_lth - pasted; 32933f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox count = min(count, tty->receive_room); 330a352def21a642133758b868c71bee12ab34ad5c5Alan Cox tty->ldisc.ops->receive_buf(tty, sel_buffer + pasted, 331a352def21a642133758b868c71bee12ab34ad5c5Alan Cox NULL, count); 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pasted += count; 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&vc->paste_wait, &wait); 335cc0a8fbb7ce00f65dc337dd91389b7151f44ed30Milind Arun Choudhary __set_current_state(TASK_RUNNING); 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_ldisc_deref(ld); 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 340