mirror of
https://github.com/rkd77/elinks.git
synced 2024-10-13 05:43:37 -04:00
383 lines
9.0 KiB
C
383 lines
9.0 KiB
C
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/* Event system support routines. */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "elinks.h"
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#include "intl/gettext/libintl.h"
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#include "main/main.h" /* terminate */
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#include "main/object.h"
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#include "session/session.h"
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#include "terminal/draw.h"
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#include "terminal/event.h"
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#include "terminal/kbd.h"
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#include "terminal/mouse.h"
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#include "terminal/tab.h"
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#include "terminal/terminal.h"
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#include "terminal/screen.h"
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#include "terminal/window.h"
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#include "util/conv.h"
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#include "util/error.h"
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#include "util/memory.h"
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#include "util/snprintf.h"
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#include "util/string.h"
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#include "viewer/timer.h"
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/* Information used for communication between ELinks instances */
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struct terminal_interlink {
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/* How big the input queue is and how much is free */
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int qlen;
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int qfreespace;
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/* UTF8 input key value decoding data. */
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struct {
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unicode_val_T ucs;
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int len;
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int min;
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} utf_8;
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/* This is the queue of events as coming from the other ELinks instance
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* owning the hosting terminal. */
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unsigned char input_queue[1];
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};
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void
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term_send_event(struct terminal *term, struct term_event *ev)
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{
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struct window *win;
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assert(ev && term);
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if_assert_failed return;
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switch (ev->ev) {
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case EVENT_INIT:
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case EVENT_RESIZE:
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{
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int width = ev->info.size.width;
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int height = ev->info.size.height;
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if (width < 0 || height < 0) {
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ERROR(gettext("Bad terminal size: %d, %d"),
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width, height);
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break;
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}
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resize_screen(term, width, height);
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erase_screen(term);
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/* Fall through */
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}
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case EVENT_REDRAW:
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/* Nasty hack to avoid assertion failures when doing -remote
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* stuff and the client exits right away */
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if (!term->screen->image) break;
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clear_terminal(term);
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term->redrawing = TREDRAW_DELAYED;
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/* Note that you do NOT want to ever go and create new
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* window inside EVENT_INIT handler (it'll get second
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* EVENT_INIT here). Perhaps the best thing you could do
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* is registering a bottom-half handler which will open
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* additional windows.
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* --pasky */
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if (ev->ev == EVENT_RESIZE) {
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/* We want to propagate EVENT_RESIZE even to inactive
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* tabs! Nothing wrong will get drawn (in the final
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* result) as the active tab is always the first one,
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* thus will be drawn last here. Thanks, Witek!
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* --pasky */
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foreachback (win, term->windows)
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win->handler(win, ev);
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} else {
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foreachback (win, term->windows)
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if (!inactive_tab(win))
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win->handler(win, ev);
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}
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term->redrawing = TREDRAW_READY;
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break;
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case EVENT_MOUSE:
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case EVENT_KBD:
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case EVENT_ABORT:
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assert(!list_empty(term->windows));
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if_assert_failed break;
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/* We need to send event to correct tab, not to the first one. --karpov */
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/* ...if we want to send it to a tab at all. --pasky */
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win = term->windows.next;
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if (win->type == WINDOW_TAB) {
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win = get_current_tab(term);
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assertm(win, "No tab to send the event to!");
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if_assert_failed return;
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}
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win->handler(win, ev);
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}
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}
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static void
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term_send_ucs(struct terminal *term, struct term_event *ev, unicode_val_T u)
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{
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unsigned char *recoded;
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recoded = u2cp_no_nbsp(u, get_opt_int_tree(term->spec, "charset"));
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if (!recoded) recoded = "*";
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while (*recoded) {
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ev->info.keyboard.key = *recoded;
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term_send_event(term, ev);
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recoded++;
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}
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}
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static void
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check_terminal_name(struct terminal *term, struct terminal_info *info)
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{
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unsigned char name[MAX_TERM_LEN + 10];
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int i;
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/* We check TERM env. var for sanity, and fallback to _template_ if
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* needed. This way we prevent elinks.conf potential corruption. */
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for (i = 0; info->name[i]; i++) {
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if (isident(info->name[i])) continue;
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usrerror(_("Warning: terminal name contains illicit chars.", term));
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return;
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}
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snprintf(name, sizeof(name), "terminal.%s", info->name);
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/* Unlock the default _template_ option tree that was asigned by
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* init_term() and get the correct one. */
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object_unlock(term->spec);
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term->spec = get_opt_rec(config_options, name);
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object_lock(term->spec);
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}
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#ifdef CONFIG_MOUSE
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static int
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ignore_mouse_event(struct terminal *term, struct term_event *ev)
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{
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struct term_event_mouse *prev = &term->prev_mouse_event;
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struct term_event_mouse *current = &ev->info.mouse;
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if (check_mouse_action(ev, B_UP)
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&& current->y == prev->y
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&& (current->button & ~BM_ACT) == (prev->button & ~BM_ACT)) {
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do_not_ignore_next_mouse_event(term);
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return 1;
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}
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copy_struct(prev, current);
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return 0;
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}
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#endif
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static int
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handle_interlink_event(struct terminal *term, struct term_event *ev)
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{
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struct terminal_info *info = NULL;
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struct terminal_interlink *interlink = term->interlink;
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switch (ev->ev) {
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case EVENT_INIT:
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if (interlink->qlen < TERMINAL_INFO_SIZE)
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return 0;
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info = (struct terminal_info *) ev;
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if (interlink->qlen < TERMINAL_INFO_SIZE + info->length)
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return 0;
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info->name[MAX_TERM_LEN - 1] = 0;
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check_terminal_name(term, info);
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memcpy(term->cwd, info->cwd, MAX_CWD_LEN);
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term->cwd[MAX_CWD_LEN - 1] = 0;
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term->environment = info->system_env;
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/* We need to make sure that it is possible to draw on the
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* terminal screen before decoding the session info so that
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* handling of bad URL syntax by openning msg_box() will be
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* possible. */
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term_send_event(term, ev);
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/* Either the initialization of the first session failed or we
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* are doing a remote session so quit.*/
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if (!decode_session_info(term, info)) {
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destroy_terminal(term);
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/* Make sure the user is notified if the initialization
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* of the first session fails. */
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if (program.terminate) {
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usrerror(_("Failed to create session.", term));
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program.retval = RET_FATAL;
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}
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return 0;
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}
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ev->ev = EVENT_REDRAW;
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/* Fall through */
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case EVENT_REDRAW:
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case EVENT_RESIZE:
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term_send_event(term, ev);
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break;
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case EVENT_MOUSE:
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#ifdef CONFIG_MOUSE
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reset_timer();
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if (!ignore_mouse_event(term, ev))
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term_send_event(term, ev);
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#endif
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break;
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case EVENT_KBD:
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{
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int utf8_io = -1;
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int key = get_kbd_key(ev);
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reset_timer();
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if (check_kbd_modifier(ev, KBD_MOD_CTRL) && toupper(key) == 'L') {
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redraw_terminal_cls(term);
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break;
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} else if (key == KBD_CTRL_C) {
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destroy_terminal(term);
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return 0;
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}
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if (interlink->utf_8.len) {
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utf8_io = get_opt_bool_tree(term->spec, "utf_8_io");
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if ((key & 0xC0) == 0x80 && utf8_io) {
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interlink->utf_8.ucs <<= 6;
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interlink->utf_8.ucs |= key & 0x3F;
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if (! --interlink->utf_8.len) {
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unicode_val_T u = interlink->utf_8.ucs;
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if (u < interlink->utf_8.min)
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u = UCS_NO_CHAR;
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term_send_ucs(term, ev, u);
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}
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break;
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} else {
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interlink->utf_8.len = 0;
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term_send_ucs(term, ev, UCS_NO_CHAR);
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}
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}
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if (key < 0x80 || key > 0xFF
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|| (utf8_io == -1
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? !get_opt_bool_tree(term->spec, "utf_8_io")
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: !utf8_io)) {
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term_send_event(term, ev);
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break;
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} else if ((key & 0xC0) == 0xC0 && (key & 0xFE) != 0xFE) {
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unsigned int mask, cov = 0x80;
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int len = 0;
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for (mask = 0x80; key & mask; mask >>= 1) {
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len++;
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interlink->utf_8.min = cov;
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cov = 1 << (1 + 5 * len);
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}
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interlink->utf_8.len = len - 1;
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interlink->utf_8.ucs = key & (mask - 1);
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break;
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}
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term_send_ucs(term, ev, UCS_NO_CHAR);
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break;
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}
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case EVENT_ABORT:
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destroy_terminal(term);
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return 0;
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default:
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ERROR(gettext("Bad event %d"), ev->ev);
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}
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/* For EVENT_INIT we read a liitle more */
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if (info) return TERMINAL_INFO_SIZE + info->length;
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return sizeof(*ev);
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}
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void
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in_term(struct terminal *term)
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{
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struct terminal_interlink *interlink = term->interlink;
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ssize_t r;
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unsigned char *iq;
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if (!interlink
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|| !interlink->qfreespace
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|| interlink->qfreespace - interlink->qlen > ALLOC_GR) {
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int qlen = interlink ? interlink->qlen : 0;
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int queuesize = ((qlen + ALLOC_GR) & ~(ALLOC_GR - 1));
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int newsize = sizeof(*interlink) + queuesize;
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interlink = mem_realloc(interlink, newsize);
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if (!interlink) {
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destroy_terminal(term);
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return;
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}
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/* Blank the members for the first allocation */
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if (!term->interlink)
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memset(interlink, 0, sizeof(*interlink));
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term->interlink = interlink;
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interlink->qfreespace = queuesize - interlink->qlen;
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}
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iq = interlink->input_queue;
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r = safe_read(term->fdin, iq + interlink->qlen, interlink->qfreespace);
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if (r <= 0) {
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if (r == -1 && errno != ECONNRESET)
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ERROR(gettext("Could not read event: %d (%s)"),
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errno, (unsigned char *) strerror(errno));
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destroy_terminal(term);
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return;
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}
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interlink->qlen += r;
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interlink->qfreespace -= r;
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while (interlink->qlen >= sizeof(struct term_event)) {
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struct term_event *ev = (struct term_event *) iq;
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int event_size = handle_interlink_event(term, ev);
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/* If the event was not handled save the bytes in the queue for
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* later in case more stuff is read later. */
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if (!event_size) break;
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/* Acount for the handled bytes */
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interlink->qlen -= event_size;
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interlink->qfreespace += event_size;
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/* If there are no more bytes to handle stop else move next
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* event bytes to the front of the queue. */
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if (!interlink->qlen) break;
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memmove(iq, iq + event_size, interlink->qlen);
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}
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}
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