diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/tty/vt/selection.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/tty/vt/selection.c | 373 |
1 files changed, 0 insertions, 373 deletions
diff --git a/ANDROID_3.4.5/drivers/tty/vt/selection.c b/ANDROID_3.4.5/drivers/tty/vt/selection.c deleted file mode 100644 index 8e9b4be9..00000000 --- a/ANDROID_3.4.5/drivers/tty/vt/selection.c +++ /dev/null @@ -1,373 +0,0 @@ -/* - * This module exports the functions: - * - * 'int set_selection(struct tiocl_selection __user *, struct tty_struct *)' - * 'void clear_selection(void)' - * 'int paste_selection(struct tty_struct *)' - * 'int sel_loadlut(char __user *)' - * - * Now that /dev/vcs exists, most of this can disappear again. - */ - -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/types.h> - -#include <asm/uaccess.h> - -#include <linux/kbd_kern.h> -#include <linux/vt_kern.h> -#include <linux/consolemap.h> -#include <linux/selection.h> -#include <linux/tiocl.h> -#include <linux/console.h> - -/* Don't take this from <ctype.h>: 011-015 on the screen aren't spaces */ -#define isspace(c) ((c) == ' ') - -extern void poke_blanked_console(void); - -/* FIXME: all this needs locking */ -/* Variables for selection control. */ -/* Use a dynamic buffer, instead of static (Dec 1994) */ -struct vc_data *sel_cons; /* must not be deallocated */ -static int use_unicode; -static volatile int sel_start = -1; /* cleared by clear_selection */ -static int sel_end; -static int sel_buffer_lth; -static char *sel_buffer; - -/* clear_selection, highlight and highlight_pointer can be called - from interrupt (via scrollback/front) */ - -/* set reverse video on characters s-e of console with selection. */ -static inline void highlight(const int s, const int e) -{ - invert_screen(sel_cons, s, e-s+2, 1); -} - -/* use complementary color to show the pointer */ -static inline void highlight_pointer(const int where) -{ - complement_pos(sel_cons, where); -} - -static u16 -sel_pos(int n) -{ - return inverse_translate(sel_cons, screen_glyph(sel_cons, n), - use_unicode); -} - -/** - * clear_selection - remove current selection - * - * Remove the current selection highlight, if any from the console - * holding the selection. The caller must hold the console lock. - */ -void clear_selection(void) -{ - highlight_pointer(-1); /* hide the pointer */ - if (sel_start != -1) { - highlight(sel_start, sel_end); - sel_start = -1; - } -} - -/* - * User settable table: what characters are to be considered alphabetic? - * 256 bits. Locked by the console lock. - */ -static u32 inwordLut[8]={ - 0x00000000, /* control chars */ - 0x03FF0000, /* digits */ - 0x87FFFFFE, /* uppercase and '_' */ - 0x07FFFFFE, /* lowercase */ - 0x00000000, - 0x00000000, - 0xFF7FFFFF, /* latin-1 accented letters, not multiplication sign */ - 0xFF7FFFFF /* latin-1 accented letters, not division sign */ -}; - -static inline int inword(const u16 c) { - return c > 0xff || (( inwordLut[c>>5] >> (c & 0x1F) ) & 1); -} - -/** - * set loadlut - load the LUT table - * @p: user table - * - * Load the LUT table from user space. The caller must hold the console - * lock. Make a temporary copy so a partial update doesn't make a mess. - */ -int sel_loadlut(char __user *p) -{ - u32 tmplut[8]; - if (copy_from_user(tmplut, (u32 __user *)(p+4), 32)) - return -EFAULT; - memcpy(inwordLut, tmplut, 32); - return 0; -} - -/* does screen address p correspond to character at LH/RH edge of screen? */ -static inline int atedge(const int p, int size_row) -{ - return (!(p % size_row) || !((p + 2) % size_row)); -} - -/* constrain v such that v <= u */ -static inline unsigned short limit(const unsigned short v, const unsigned short u) -{ - return (v > u) ? u : v; -} - -/* stores the char in UTF8 and returns the number of bytes used (1-3) */ -static int store_utf8(u16 c, char *p) -{ - if (c < 0x80) { - /* 0******* */ - p[0] = c; - return 1; - } else if (c < 0x800) { - /* 110***** 10****** */ - p[0] = 0xc0 | (c >> 6); - p[1] = 0x80 | (c & 0x3f); - return 2; - } else { - /* 1110**** 10****** 10****** */ - p[0] = 0xe0 | (c >> 12); - p[1] = 0x80 | ((c >> 6) & 0x3f); - p[2] = 0x80 | (c & 0x3f); - return 3; - } -} - -/** - * set_selection - set the current selection. - * @sel: user selection info - * @tty: the console tty - * - * Invoked by the ioctl handle for the vt layer. - * - * The entire selection process is managed under the console_lock. It's - * a lot under the lock but its hardly a performance path - */ -int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *tty) -{ - struct vc_data *vc = vc_cons[fg_console].d; - int sel_mode, new_sel_start, new_sel_end, spc; - char *bp, *obp; - int i, ps, pe, multiplier; - u16 c; - int mode; - - poke_blanked_console(); - - { unsigned short xs, ys, xe, ye; - - if (!access_ok(VERIFY_READ, sel, sizeof(*sel))) - return -EFAULT; - __get_user(xs, &sel->xs); - __get_user(ys, &sel->ys); - __get_user(xe, &sel->xe); - __get_user(ye, &sel->ye); - __get_user(sel_mode, &sel->sel_mode); - xs--; ys--; xe--; ye--; - xs = limit(xs, vc->vc_cols - 1); - ys = limit(ys, vc->vc_rows - 1); - xe = limit(xe, vc->vc_cols - 1); - ye = limit(ye, vc->vc_rows - 1); - ps = ys * vc->vc_size_row + (xs << 1); - pe = ye * vc->vc_size_row + (xe << 1); - - if (sel_mode == TIOCL_SELCLEAR) { - /* useful for screendump without selection highlights */ - clear_selection(); - return 0; - } - - if (mouse_reporting() && (sel_mode & TIOCL_SELMOUSEREPORT)) { - mouse_report(tty, sel_mode & TIOCL_SELBUTTONMASK, xs, ys); - return 0; - } - } - - if (ps > pe) /* make sel_start <= sel_end */ - { - int tmp = ps; - ps = pe; - pe = tmp; - } - - if (sel_cons != vc_cons[fg_console].d) { - clear_selection(); - sel_cons = vc_cons[fg_console].d; - } - mode = vt_do_kdgkbmode(fg_console); - if (mode == K_UNICODE) - use_unicode = 1; - else - use_unicode = 0; - - switch (sel_mode) - { - case TIOCL_SELCHAR: /* character-by-character selection */ - new_sel_start = ps; - new_sel_end = pe; - break; - case TIOCL_SELWORD: /* word-by-word selection */ - spc = isspace(sel_pos(ps)); - for (new_sel_start = ps; ; ps -= 2) - { - if ((spc && !isspace(sel_pos(ps))) || - (!spc && !inword(sel_pos(ps)))) - break; - new_sel_start = ps; - if (!(ps % vc->vc_size_row)) - break; - } - spc = isspace(sel_pos(pe)); - for (new_sel_end = pe; ; pe += 2) - { - if ((spc && !isspace(sel_pos(pe))) || - (!spc && !inword(sel_pos(pe)))) - break; - new_sel_end = pe; - if (!((pe + 2) % vc->vc_size_row)) - break; - } - break; - case TIOCL_SELLINE: /* line-by-line selection */ - new_sel_start = ps - ps % vc->vc_size_row; - new_sel_end = pe + vc->vc_size_row - - pe % vc->vc_size_row - 2; - break; - case TIOCL_SELPOINTER: - highlight_pointer(pe); - return 0; - default: - return -EINVAL; - } - - /* remove the pointer */ - highlight_pointer(-1); - - /* select to end of line if on trailing space */ - if (new_sel_end > new_sel_start && - !atedge(new_sel_end, vc->vc_size_row) && - isspace(sel_pos(new_sel_end))) { - for (pe = new_sel_end + 2; ; pe += 2) - if (!isspace(sel_pos(pe)) || - atedge(pe, vc->vc_size_row)) - break; - if (isspace(sel_pos(pe))) - new_sel_end = pe; - } - if (sel_start == -1) /* no current selection */ - highlight(new_sel_start, new_sel_end); - else if (new_sel_start == sel_start) - { - if (new_sel_end == sel_end) /* no action required */ - return 0; - else if (new_sel_end > sel_end) /* extend to right */ - highlight(sel_end + 2, new_sel_end); - else /* contract from right */ - highlight(new_sel_end + 2, sel_end); - } - else if (new_sel_end == sel_end) - { - if (new_sel_start < sel_start) /* extend to left */ - highlight(new_sel_start, sel_start - 2); - else /* contract from left */ - highlight(sel_start, new_sel_start - 2); - } - else /* some other case; start selection from scratch */ - { - clear_selection(); - highlight(new_sel_start, new_sel_end); - } - sel_start = new_sel_start; - sel_end = new_sel_end; - - /* Allocate a new buffer before freeing the old one ... */ - multiplier = use_unicode ? 3 : 1; /* chars can take up to 3 bytes */ - bp = kmalloc(((sel_end-sel_start)/2+1)*multiplier, GFP_KERNEL); - if (!bp) { - printk(KERN_WARNING "selection: kmalloc() failed\n"); - clear_selection(); - return -ENOMEM; - } - kfree(sel_buffer); - sel_buffer = bp; - - obp = bp; - for (i = sel_start; i <= sel_end; i += 2) { - c = sel_pos(i); - if (use_unicode) - bp += store_utf8(c, bp); - else - *bp++ = c; - if (!isspace(c)) - obp = bp; - if (! ((i + 2) % vc->vc_size_row)) { - /* strip trailing blanks from line and add newline, - unless non-space at end of line. */ - if (obp != bp) { - bp = obp; - *bp++ = '\r'; - } - obp = bp; - } - } - sel_buffer_lth = bp - sel_buffer; - return 0; -} - -/* Insert the contents of the selection buffer into the - * queue of the tty associated with the current console. - * Invoked by ioctl(). - * - * Locking: called without locks. Calls the ldisc wrongly with - * unsafe methods, - */ -int paste_selection(struct tty_struct *tty) -{ - struct vc_data *vc = tty->driver_data; - int pasted = 0; - unsigned int count; - struct tty_ldisc *ld; - DECLARE_WAITQUEUE(wait, current); - - - console_lock(); - poke_blanked_console(); - console_unlock(); - - /* FIXME: wtf is this supposed to achieve ? */ - ld = tty_ldisc_ref(tty); - if (!ld) - ld = tty_ldisc_ref_wait(tty); - - /* FIXME: this is completely unsafe */ - add_wait_queue(&vc->paste_wait, &wait); - while (sel_buffer && sel_buffer_lth > pasted) { - set_current_state(TASK_INTERRUPTIBLE); - if (test_bit(TTY_THROTTLED, &tty->flags)) { - schedule(); - continue; - } - count = sel_buffer_lth - pasted; - count = min(count, tty->receive_room); - tty->ldisc->ops->receive_buf(tty, sel_buffer + pasted, - NULL, count); - pasted += count; - } - remove_wait_queue(&vc->paste_wait, &wait); - __set_current_state(TASK_RUNNING); - - tty_ldisc_deref(ld); - return 0; -} |