Blob
Date:
Thu May 5 11:20:46 2022
UTC
Message:
rate-limit the update of the download pane
/** Copyright (c) 2021 Omar Polo <op@omarpolo.com>** Permission to use, copy, modify, and distribute this software for any* purpose with or without fee is hereby granted, provided that the above* copyright notice and this permission notice appear in all copies.** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.*//** Ncurses UI for telescope.** Text scrolling* ==============** ncurses allows you to scroll a window, but when a line goes out of* the visible area it's forgotten. We keep a list of formatted lines* (``visual lines'') that we know fits in the window, and draw them.** This means that on every resize we have to clear our list of lines* and re-render everything. A clever approach would be to do this* ``on-demand'', but it's still missing.**/#include "compat.h"#include <assert.h>#include <curses.h>#include <locale.h>#include <signal.h>#include <stdarg.h>#include <stdlib.h>#include <string.h>#include <unistd.h>#include "defaults.h"#include "minibuffer.h"#include "session.h"#include "telescope.h"#include "ui.h"#include "utf8.h"static struct event stdioev, winchev;static void set_scroll_position(struct tab *, size_t, size_t);static void restore_curs_x(struct buffer *);static int readkey(void);static void dispatch_stdio(int, short, void*);static void handle_resize(int, short, void*);static void handle_resize_nodelay(int, short, void*);static void handle_download_refresh(int, short, void *);static void rearrange_windows(void);static void line_prefix_and_text(struct vline *, char *, size_t, const char **, const char **);static void print_vline(int, int, WINDOW*, struct vline*);static void redraw_tabline(void);static void redraw_window(WINDOW *, int, int, int, int, struct buffer *);static void redraw_download(void);static void redraw_help(void);static void redraw_body(struct tab*);static void redraw_modeline(struct tab*);static void redraw_minibuffer(void);static void do_redraw_echoarea(void);static void do_redraw_minibuffer(void);static void do_redraw_minibuffer_compl(void);static void place_cursor(int);static void redraw_tab(struct tab*);static void update_loading_anim(int, short, void*);static void stop_loading_anim(struct tab*);static int should_rearrange_windows;static int show_tab_bar;static int too_small;static int x_offset;struct thiskey thiskey;struct tab *current_tab;static struct event resizeev;static struct timeval resize_timer = { 0, 250000 };static struct event download_refreshev;static struct timeval download_refresh_timer = { 0, 250000 };static WINDOW *tabline, *body, *modeline, *echoarea, *minibuffer;int body_lines, body_cols;static WINDOW *help;/* not static so we can see them from help.c */struct buffer helpwin;int help_lines, help_cols;static WINDOW *download;/* not static so we can see them from download.c */struct buffer downloadwin;int download_lines;int download_cols;static int side_window;static int in_side_window;static struct timeval loadingev_timer = { 0, 250000 };static char keybuf[64];/* XXX: don't forget to init these in main() */struct kmap global_map,minibuffer_map,*current_map,*base_map;static inline voidupdate_x_offset(void){if (olivetti_mode && fill_column < body_cols)x_offset = (body_cols - fill_column)/2;elsex_offset = 0;}static voidset_scroll_position(struct tab *tab, size_t top, size_t cur){struct line *last;struct vline *vl;size_t i = 0;int topfound = 0;last = TAILQ_FIRST(&tab->buffer.page.head);TAILQ_FOREACH(vl, &tab->buffer.head, vlines) {if (last != vl->parent) {last = vl->parent;i++;}if (!topfound && i == top) {topfound = 1;tab->buffer.top_line = vl;}if (i == cur) {tab->buffer.current_line = vl;return;}}if (!topfound)tab->buffer.top_line = TAILQ_FIRST(&tab->buffer.head);tab->buffer.current_line = tab->buffer.top_line;}voidget_scroll_position(struct tab *tab, size_t *top, size_t *cur){struct line *l;int topfound = 0;*top = 0;*cur = 0;if (tab->buffer.top_line == NULL ||tab->buffer.current_line == NULL)return;TAILQ_FOREACH(l, &tab->buffer.page.head, lines) {if (tab->buffer.top_line->parent == l)topfound = 1;if (tab->buffer.current_line->parent == l)return;if (!topfound)(*top)++;(*cur)++;}}voidsave_excursion(struct excursion *place, struct buffer *buffer){place->curs_x = buffer->curs_x;place->curs_y = buffer->curs_y;place->line_off = buffer->line_off;place->top_line = buffer->top_line;place->current_line = buffer->current_line;place->cpoff = buffer->cpoff;}voidrestore_excursion(struct excursion *place, struct buffer *buffer){buffer->curs_x = place->curs_x;buffer->curs_y = place->curs_y;buffer->line_off = place->line_off;buffer->top_line = place->top_line;buffer->current_line = place->current_line;buffer->cpoff = place->cpoff;}static voidrestore_curs_x(struct buffer *buffer){struct vline *vl;const char *prfx, *text;vl = buffer->current_line;if (vl == NULL || vl->line == NULL)buffer->curs_x = buffer->cpoff = 0;else if (vl->parent->data != NULL) {text = vl->parent->data;buffer->curs_x = utf8_snwidth(text + 1, buffer->cpoff) + 1;} elsebuffer->curs_x = utf8_snwidth(vl->line, buffer->cpoff);/* small hack: don't olivetti-mode the download pane */if (buffer != &downloadwin)buffer->curs_x += x_offset;if (vl == NULL)return;if (vl->parent->data != NULL)buffer->curs_x += utf8_swidth_between(vl->parent->line,vl->parent->data);else {prfx = line_prefixes[vl->parent->type].prfx1;buffer->curs_x += utf8_swidth(prfx);}}voidglobal_key_unbound(void){message("%s is undefined", keybuf);}struct buffer *current_buffer(void){if (in_minibuffer)return &ministate.buffer;if (in_side_window & SIDE_WINDOW_LEFT)return &helpwin;if (in_side_window & SIDE_WINDOW_BOTTOM)return &downloadwin;return ¤t_tab->buffer;}static intreadkey(void){uint32_t state = 0;if ((thiskey.key = wgetch(body)) == ERR)return 0;thiskey.meta = thiskey.key == '\e';if (thiskey.meta) {thiskey.key = wgetch(body);if (thiskey.key == ERR || thiskey.key == '\e') {thiskey.meta = 0;thiskey.key = '\e';}}thiskey.cp = 0;if ((unsigned int)thiskey.key >= UINT8_MAX)return 1;while (1) {if (!utf8_decode(&state, &thiskey.cp, (uint8_t)thiskey.key))break;if ((thiskey.key = wgetch(body)) == ERR) {message("Error decoding user input");return 0;}}return 1;}static voiddispatch_stdio(int fd, short ev, void *d){int lk;const char *keyname;char tmp[5] = {0};/* TODO: schedule a redraw? */if (too_small)return;if (!readkey())return;if (keybuf[0] != '\0')strlcat(keybuf, " ", sizeof(keybuf));if (thiskey.meta)strlcat(keybuf, "M-", sizeof(keybuf));if (thiskey.cp != 0) {utf8_encode(thiskey.cp, tmp);strlcat(keybuf, tmp, sizeof(keybuf));} else if ((keyname = unkbd(thiskey.key)) != NULL) {strlcat(keybuf, keyname, sizeof(keybuf));} else {tmp[0] = thiskey.key;strlcat(keybuf, tmp, sizeof(keybuf));}lk = lookup_key(¤t_map, &thiskey, current_buffer());if (lk == LK_UNBOUND) {if (current_map->unhandled_input != NULL)current_map->unhandled_input();elseglobal_key_unbound();}if (lk != LK_ADVANCED_MAP) {current_map = base_map;strlcpy(keybuf, "", sizeof(keybuf));}if (side_window & SIDE_WINDOW_LEFT)recompute_help();if (should_rearrange_windows)rearrange_windows();redraw_tab(current_tab);}static voidhandle_resize(int sig, short ev, void *d){if (event_pending(&resizeev, EV_TIMEOUT, NULL)) {event_del(&resizeev);}evtimer_set(&resizeev, handle_resize_nodelay, NULL);evtimer_add(&resizeev, &resize_timer);}static voidhandle_resize_nodelay(int s, short ev, void *d){endwin();refresh();clear();rearrange_windows();}static voidhandle_download_refresh(int s, short v, void *d){if (side_window & SIDE_WINDOW_BOTTOM) {recompute_downloads();redraw_tab(current_tab);}}static inline intshould_show_tab_bar(void){if (tab_bar_show == -1)return 0;if (tab_bar_show == 0)return 1;return TAILQ_NEXT(TAILQ_FIRST(&tabshead), tabs) != NULL;}static voidrearrange_windows(void){int lines;int minibuffer_lines;should_rearrange_windows = 0;show_tab_bar = should_show_tab_bar();lines = LINES;/* 3 lines for the ui and 12 for the */if ((too_small = lines < 15)) {erase();printw("Window too small.");refresh();return;}/* move and resize the windows, in reverse order! */if (in_minibuffer == MB_COMPREAD) {minibuffer_lines = MIN(10, lines/2);mvwin(minibuffer, lines - minibuffer_lines, 0);wresize(minibuffer, minibuffer_lines, COLS);lines -= minibuffer_lines;wrap_page(&ministate.compl.buffer, COLS);}mvwin(echoarea, --lines, 0);wresize(echoarea, 1, COLS);mvwin(modeline, --lines, 0);wresize(modeline, 1, COLS);if (side_window & SIDE_WINDOW_BOTTOM) {download_lines = MIN(5, lines/2);download_cols = COLS;mvwin(download, lines - download_lines, 0);wresize(download, download_lines, download_cols);lines -= download_lines;wrap_page(&downloadwin, download_cols);}body_lines = show_tab_bar ? --lines : lines;body_cols = COLS;/** Here we make the assumption that show_tab_bar is either 0* or 1, and reuse that as argument to mvwin.*/if (side_window & SIDE_WINDOW_LEFT) {help_cols = 0.3 * COLS;help_lines = lines;mvwin(help, show_tab_bar, 0);wresize(help, help_lines, help_cols);wrap_page(&helpwin, help_cols);body_cols = COLS - help_cols - 1;mvwin(body, show_tab_bar, help_cols);} elsemvwin(body, show_tab_bar, 0);update_x_offset();wresize(body, body_lines, body_cols);if (show_tab_bar)wresize(tabline, 1, COLS);wrap_page(¤t_tab->buffer, body_cols);redraw_tab(current_tab);}static voidline_prefix_and_text(struct vline *vl, char *buf, size_t len,const char **prfx_ret, const char **text_ret){int type, i, cont, width;char *space, *t;if ((*text_ret = vl->line) == NULL)*text_ret = "";cont = vl->flags & L_CONTINUATION;type = vl->parent->type;if (!cont)*prfx_ret = line_prefixes[type].prfx1;else*prfx_ret = line_prefixes[type].prfx2;space = vl->parent->data;if (!emojify_link || type != LINE_LINK || space == NULL)return;if (cont) {memset(buf, 0, len);width = utf8_swidth_between(vl->parent->line, space);for (i = 0; i < width + 1; ++i)strlcat(buf, " ", len);} else {strlcpy(buf, *text_ret, len);if ((t = strchr(buf, ' ')) != NULL)*t = '\0';strlcat(buf, " ", len);/* skip the emoji */*text_ret += (space - vl->parent->line) + 1;}*prfx_ret = buf;}static inline voidprint_vline_descr(int width, WINDOW *window, struct vline *vl){int x, y, goal;switch (vl->parent->type) {case LINE_COMPL:case LINE_COMPL_CURRENT:goal = width/2;break;case LINE_DOWNLOAD:case LINE_DOWNLOAD_DONE:goal = width/4;break;case LINE_HELP:goal = 8;break;default:return;}if (vl->parent->alt == NULL)return;(void)y;getyx(window, y, x);if (goal <= x)wprintw(window, " ");for (; goal > x; ++x)wprintw(window, " ");wprintw(window, "%s", vl->parent->alt);}/** Core part of the rendering. It prints a vline starting from the* current cursor position. Printing a vline consists of skipping* `off' columns (for olivetti-mode), print the correct prefix (which* may be the emoji in case of emojified links-lines), printing the* text itself, filling until width - off and filling off columns* again.*/static voidprint_vline(int off, int width, WINDOW *window, struct vline *vl){/** Believe me or not, I've seen emoji ten code points long!* That means, to stay large, 4*10 bytes + NUL.*/char emojibuf[41] = {0};const char *text, *prfx;struct line_face *f;int i, left, x, y;f = &line_faces[vl->parent->type];/* unused, set by getyx */(void)y;if (vl->parent->type == LINE_FRINGE && fringe_ignore_offset)off = 0;line_prefix_and_text(vl, emojibuf, sizeof(emojibuf), &prfx, &text);wattr_on(window, body_face.left, NULL);for (i = 0; i < off; i++)waddch(window, ' ');wattr_off(window, body_face.left, NULL);wattr_on(window, f->prefix, NULL);wprintw(window, "%s", prfx);wattr_off(window, f->prefix, NULL);wattr_on(window, f->text, NULL);wprintw(window, "%s", text);print_vline_descr(width, window, vl);wattr_off(window, f->text, NULL);getyx(window, y, x);left = width - x;wattr_on(window, f->trail, NULL);for (i = 0; i < left - off; ++i)waddch(window, ' ');wattr_off(window, f->trail, NULL);wattr_on(window, body_face.right, NULL);for (i = 0; i < off; i++)waddch(window, ' ');wattr_off(window, body_face.right, NULL);}static voidredraw_tabline(void){struct tab *tab;size_t toskip, ots, tabwidth, space, x;int current, y, truncated, pair;const char *title;char buf[25];x = 0;/* unused, but setted by a getyx */(void)y;tabwidth = sizeof(buf)+1;space = COLS-2;toskip = 0;TAILQ_FOREACH(tab, &tabshead, tabs) {toskip++;if (tab == current_tab)break;}if (toskip * tabwidth <= space)toskip = 0;else {ots = toskip;toskip--;while (toskip != 0 &&(ots - toskip+1) * tabwidth < space)toskip--;}werase(tabline);wattr_on(tabline, tab_face.background, NULL);wprintw(tabline, toskip == 0 ? " " : "<");wattr_off(tabline, tab_face.background, NULL);truncated = 0;TAILQ_FOREACH(tab, &tabshead, tabs) {if (truncated)break;if (toskip != 0) {toskip--;continue;}getyx(tabline, y, x);if (x + sizeof(buf)+2 >= (size_t)COLS)truncated = 1;current = tab == current_tab;if (*(title = tab->buffer.page.title) == '\0')title = tab->hist_cur->h;if (tab->flags & TAB_URGENT)strlcpy(buf, "!", sizeof(buf));elsestrlcpy(buf, " ", sizeof(buf));if (strlcat(buf, title, sizeof(buf)) >= sizeof(buf)) {/* truncation happens */strlcpy(&buf[sizeof(buf)-4], "...", 4);} else {/* pad with spaces */while (strlcat(buf, " ", sizeof(buf)) < sizeof(buf))/* nop */ ;}pair = current ? tab_face.current : tab_face.tab;wattr_on(tabline, pair, NULL);wprintw(tabline, "%s", buf);wattr_off(tabline, pair, NULL);wattr_on(tabline, tab_face.background, NULL);if (TAILQ_NEXT(tab, tabs) != NULL)wprintw(tabline, "┃");wattr_off(tabline, tab_face.background, NULL);}wattr_on(tabline, tab_face.background, NULL);for (; x < (size_t)COLS; ++x)waddch(tabline, ' ');if (truncated)mvwprintw(tabline, 0, COLS-1, ">");wattr_off(tabline, tab_face.background, NULL);}/** Compute the first visible line around vl. Try to search forward* until the end of the buffer; if a visible line is not found, search* backward. Return NULL if no viable line was found.*/struct vline *adjust_line(struct vline *vl, struct buffer *buffer){struct vline *t;if (vl == NULL)return NULL;if (!(vl->parent->flags & L_HIDDEN))return vl;/* search forward */for (t = vl;t != NULL && t->parent->flags & L_HIDDEN;t = TAILQ_NEXT(t, vlines)); /* nop */if (t != NULL)return t;/* search backward */for (t = vl;t != NULL && t->parent->flags & L_HIDDEN;t = TAILQ_PREV(t, vhead, vlines)); /* nop */return t;}static voidredraw_window(WINDOW *win, int off, int height, int width,int show_fringe, struct buffer *buffer){struct vline *vl;int onscreen = 0, l = 0;restore_curs_x(buffer);/** TODO: ignoring buffer->force_update and always* re-rendering. In theory we can recompute the y position* without a re-render, and optimize here. It's not the only* optimisation possible here, wscrl wolud also be an* interesting one.*/again:werase(win);buffer->curs_y = 0;if (TAILQ_EMPTY(&buffer->head))goto end;if (buffer->top_line == NULL)buffer->top_line = TAILQ_FIRST(&buffer->head);buffer->top_line = adjust_line(buffer->top_line, buffer);if (buffer->top_line == NULL)goto end;buffer->current_line = adjust_line(buffer->current_line, buffer);for (vl = buffer->top_line; vl != NULL; vl = TAILQ_NEXT(vl, vlines)) {if (vl->parent->flags & L_HIDDEN)continue;wmove(win, l, 0);print_vline(off, width, win, vl);if (vl == buffer->current_line)onscreen = 1;if (!onscreen)buffer->curs_y++;l++;if (l == height)break;}if (!onscreen) {for (; vl != NULL; vl = TAILQ_NEXT(vl, vlines)) {if (vl == buffer->current_line)break;if (vl->parent->flags & L_HIDDEN)continue;buffer->line_off++;buffer->top_line = TAILQ_NEXT(buffer->top_line, vlines);}if (vl != NULL)goto again;}buffer->last_line_off = buffer->line_off;buffer->force_redraw = 0;end:for (; show_fringe && l < height; l++)print_vline(off, width, win, &fringe);wmove(win, buffer->curs_y, buffer->curs_x);}static voidredraw_download(void){redraw_window(download, 0, download_lines, COLS, 0, &downloadwin);}static voidredraw_help(void){redraw_window(help, 0, help_lines, help_cols, 1, &helpwin);}static voidredraw_body(struct tab *tab){static struct tab *last_tab;if (last_tab != tab)tab->buffer.force_redraw =1;last_tab = tab;redraw_window(body, x_offset, body_lines, body_cols, 1, &tab->buffer);}static inline chartrust_status_char(enum trust_state ts){switch (ts) {case TS_UNKNOWN: return '-';case TS_UNTRUSTED: return '!';case TS_TEMP_TRUSTED: return '!';case TS_TRUSTED: return 'v';case TS_VERIFIED: return 'V';default: return 'X';}}static voidredraw_modeline(struct tab *tab){struct buffer *buffer;double pct;int x, y, max_x, max_y;const char *mode;const char *spin = "-\\|/";buffer = current_buffer();mode = buffer->page.name;werase(modeline);wattr_on(modeline, modeline_face.background, NULL);wmove(modeline, 0, 0);wprintw(modeline, "-%c%c- %s ",spin[tab->loading_anim_step],trust_status_char(tab->trust),mode == NULL ? "(none)" : mode);pct = (buffer->line_off + buffer->curs_y) * 100.0/ buffer->line_max;if (buffer->line_max <= (size_t)body_lines)wprintw(modeline, "All ");else if (buffer->line_off == 0)wprintw(modeline, "Top ");else if (buffer->line_off + body_lines >= buffer->line_max)wprintw(modeline, "Bottom ");elsewprintw(modeline, "%.0f%% ", pct);wprintw(modeline, "%zu/%zu %s ",buffer->line_off + buffer->curs_y,buffer->line_max,tab->hist_cur->h);getyx(modeline, y, x);getmaxyx(modeline, max_y, max_x);(void)y;(void)max_y;for (; x < max_x; ++x)waddstr(modeline, "-");wattr_off(modeline, modeline_face.background, NULL);}static voidredraw_minibuffer(void){wattr_on(echoarea, minibuffer_face.background, NULL);werase(echoarea);if (in_minibuffer)do_redraw_minibuffer();elsedo_redraw_echoarea();if (in_minibuffer == MB_COMPREAD)do_redraw_minibuffer_compl();wattr_off(echoarea, minibuffer_face.background, NULL);}static voiddo_redraw_echoarea(void){struct vline *vl;if (ministate.curmesg != NULL)wprintw(echoarea, "%s", ministate.curmesg);else if (*keybuf != '\0')waddstr(echoarea, keybuf);else {/* If nothing else, show the URL at point */vl = current_tab->buffer.current_line;if (vl != NULL && vl->parent->type == LINE_LINK)waddstr(echoarea, vl->parent->alt);}}static voiddo_redraw_minibuffer(void){struct buffer *cmplbuf, *buffer;size_t off_y, off_x = 0;const char *start, *c;cmplbuf = &ministate.compl.buffer;buffer = &ministate.buffer;(void)off_y; /* unused, set by getyx */wmove(echoarea, 0, 0);if (in_minibuffer == MB_COMPREAD)wprintw(echoarea, "(%2zu) ",cmplbuf->line_max);wprintw(echoarea, "%s", ministate.prompt);if (ministate.hist_cur != NULL)wprintw(echoarea, "(%zu/%zu) ",ministate.hist_off + 1,ministate.history->len);getyx(echoarea, off_y, off_x);start = ministate.hist_cur != NULL? ministate.hist_cur->h: ministate.buf;c = utf8_nth(buffer->current_line->line, buffer->cpoff);while (utf8_swidth_between(start, c) > (size_t)COLS/2) {start = utf8_next_cp(start);}waddstr(echoarea, start);if (ministate.curmesg != NULL)wprintw(echoarea, " [%s]", ministate.curmesg);wmove(echoarea, 0, off_x + utf8_swidth_between(start, c));}static voiddo_redraw_minibuffer_compl(void){redraw_window(minibuffer, 0, 10, COLS, 1,&ministate.compl.buffer);}/** Place the cursor in the right ncurses window. If soft is 1, use* wnoutrefresh (which shouldn't cause any I/O); otherwise use* wrefresh.*/static voidplace_cursor(int soft){int (*touch)(WINDOW *);if (soft)touch = wnoutrefresh;elsetouch = wrefresh;if (in_minibuffer) {if (side_window & SIDE_WINDOW_LEFT)touch(help);if (side_window & SIDE_WINDOW_BOTTOM)touch(download);touch(body);touch(echoarea);} else if (in_side_window & SIDE_WINDOW_LEFT) {touch(body);touch(echoarea);if (in_side_window & SIDE_WINDOW_BOTTOM)touch(download);touch(help);} else if (in_side_window & SIDE_WINDOW_BOTTOM) {touch(body);touch(echoarea);if (in_side_window & SIDE_WINDOW_LEFT)touch(help);touch(download);} else {if (side_window & SIDE_WINDOW_LEFT)touch(help);if (side_window & SIDE_WINDOW_BOTTOM)touch(download);touch(echoarea);touch(body);}}static voidredraw_tab(struct tab *tab){if (too_small)return;if (side_window & SIDE_WINDOW_LEFT) {redraw_help();wnoutrefresh(help);}if (side_window & SIDE_WINDOW_BOTTOM) {redraw_download();wnoutrefresh(download);}if (show_tab_bar)redraw_tabline();redraw_body(tab);redraw_modeline(tab);redraw_minibuffer();wnoutrefresh(tabline);wnoutrefresh(modeline);if (in_minibuffer == MB_COMPREAD)wnoutrefresh(minibuffer);place_cursor(1);doupdate();if (set_title)dprintf(1, "\033]2;%s - Telescope\a",current_tab->buffer.page.title);}voidstart_loading_anim(struct tab *tab){if (tab->loading_anim)return;tab->loading_anim = 1;evtimer_set(&tab->loadingev, update_loading_anim, tab);evtimer_add(&tab->loadingev, &loadingev_timer);}static voidupdate_loading_anim(int fd, short ev, void *d){struct tab *tab = d;tab->loading_anim_step = (tab->loading_anim_step+1)%4;if (tab == current_tab) {redraw_modeline(tab);wrefresh(modeline);wrefresh(body);if (in_minibuffer)wrefresh(echoarea);}evtimer_add(&tab->loadingev, &loadingev_timer);}static voidstop_loading_anim(struct tab *tab){if (!tab->loading_anim)return;evtimer_del(&tab->loadingev);tab->loading_anim = 0;tab->loading_anim_step = 0;if (tab != current_tab)return;redraw_modeline(tab);wrefresh(modeline);wrefresh(body);if (in_minibuffer)wrefresh(echoarea);}intui_print_colors(void){int colors = 0, pairs = 0, can_change = 0;int columns = 16, lines, color, i, j;initscr();if (has_colors()) {start_color();use_default_colors();colors = COLORS;pairs = COLOR_PAIRS;can_change = can_change_color();}endwin();printf("Term info:\n");printf("TERM=%s COLORS=%d COLOR_PAIRS=%d can_change_colors=%d\n",getenv("TERM"), colors, pairs, can_change);printf("\n");if (colors == 0) {printf("No color support\n");return 0;}printf("Available colors:\n\n");lines = (colors - 1) / columns + 1;color = 0;for (i = 0; i < lines; ++i) {for (j = 0; j < columns; ++j, ++color) {printf("\033[0;38;5;%dm %03d", color, color);}printf("\n");}printf("\033[0m");fflush(stdout);return 0;}intui_init(){setlocale(LC_ALL, "");if (TAILQ_EMPTY(&global_map.m)) {fprintf(stderr, "no keys defined!\n");return 0;}minibuffer_init();/* initialize download window */TAILQ_INIT(&downloadwin.head);TAILQ_INIT(&downloadwin.page.head);/* initialize help window */TAILQ_INIT(&helpwin.head);TAILQ_INIT(&helpwin.page.head);base_map = &global_map;current_map = &global_map;initscr();if (enable_colors) {if (has_colors()) {start_color();use_default_colors();} elseenable_colors = 0;}config_apply_style();raw();noecho();nonl();intrflush(stdscr, FALSE);if ((tabline = newwin(1, 1, 0, 0)) == NULL)return 0;if ((body = newwin(1, 1, 0, 0)) == NULL)return 0;if ((modeline = newwin(1, 1, 0, 0)) == NULL)return 0;if ((echoarea = newwin(1, 1, 0, 0)) == NULL)return 0;if ((minibuffer = newwin(1, 1, 0, 0)) == NULL)return 0;if ((download = newwin(1, 1, 0, 0)) == NULL)return 0;if ((help = newwin(1, 1, 0, 0)) == NULL)return 0;wbkgd(body, body_face.body);wbkgd(download, download_face.background);wbkgd(echoarea, minibuffer_face.background);update_x_offset();keypad(body, TRUE);scrollok(body, FALSE);/* non-blocking input */wtimeout(body, 0);wtimeout(help, 0);mvwprintw(body, 0, 0, "");return 1;}voidui_main_loop(void){evtimer_set(&resizeev, handle_resize, NULL);evtimer_set(&download_refreshev, handle_download_refresh, NULL);event_set(&stdioev, 0, EV_READ | EV_PERSIST, dispatch_stdio, NULL);event_add(&stdioev, NULL);signal_set(&winchev, SIGWINCH, handle_resize, NULL);signal_add(&winchev, NULL);switch_to_tab(current_tab);rearrange_windows();event_dispatch();}voidui_on_tab_loaded(struct tab *tab){stop_loading_anim(tab);message("Loaded %s", tab->hist_cur->h);if (tab->hist_cur->current_off != 0 &&tab->buffer.current_line == TAILQ_FIRST(&tab->buffer.head)) {set_scroll_position(tab, tab->hist_cur->line_off,tab->hist_cur->current_off);redraw_tab(tab);return;}if (show_tab_bar)redraw_tabline();wrefresh(tabline);place_cursor(0);}voidui_on_tab_refresh(struct tab *tab){wrap_page(&tab->buffer, body_cols);if (tab == current_tab)redraw_tab(tab);elsetab->flags |= TAB_URGENT;}voidui_on_download_refresh(void){if (event_pending(&download_refreshev, EV_TIMEOUT, NULL))return;evtimer_set(&download_refreshev, handle_download_refresh, NULL);evtimer_add(&download_refreshev, &download_refresh_timer);}voidui_remotely_open_link(const char *uri){new_tab(uri, NULL, NULL);ui_on_tab_refresh(current_tab);/* ring the bell */printf("\a");fflush(stdout);}const char *ui_keyname(int k){return keyname(k);}voidui_toggle_side_window(int kind){if (in_side_window & kind)ui_other_window();side_window ^= kind;if (side_window & SIDE_WINDOW_LEFT)recompute_help();if (side_window & SIDE_WINDOW_BOTTOM)recompute_downloads();/** ugly hack, but otherwise the window doesn't get updated* until I call rearrange_windows a second time (e.g. via* C-l). I will be happy to know why something like this is* needed.*/rearrange_windows();rearrange_windows();}voidui_show_downloads_pane(void){if (!(side_window & SIDE_WINDOW_BOTTOM))ui_toggle_side_window(SIDE_WINDOW_BOTTOM);}voidui_schedule_redraw(void){should_rearrange_windows = 1;}voidui_require_input(struct tab *tab, int hide, void (*fn)(void)){/* TODO: hard-switching to another tab is ugly */switch_to_tab(tab);enter_minibuffer(sensible_self_insert, fn, exit_minibuffer,&ir_history, NULL, NULL, 0);strlcpy(ministate.prompt, "Input required: ",sizeof(ministate.prompt));redraw_tab(tab);}voidui_after_message_hook(void){redraw_minibuffer();place_cursor(0);}voidui_yornp(const char *prompt, void (*fn)(int, struct tab *),struct tab *data){yornp(prompt, fn, data);redraw_tab(current_tab);}voidui_read(const char *prompt, void (*fn)(const char*, struct tab *),struct tab *data, const char *input){minibuffer_read(prompt, fn, data);if (input != NULL) {strlcpy(ministate.buf, input, sizeof(ministate.buf));cmd_move_end_of_line(&ministate.buffer);}redraw_tab(current_tab);}voidui_other_window(void){if (in_side_window & SIDE_WINDOW_LEFT &&side_window & SIDE_WINDOW_BOTTOM)in_side_window = SIDE_WINDOW_BOTTOM;else if (in_side_window)in_side_window = 0;else if (!in_side_window && side_window & SIDE_WINDOW_LEFT)in_side_window = SIDE_WINDOW_LEFT;else if (!in_side_window && side_window)in_side_window = SIDE_WINDOW_BOTTOM;elsemessage("No other window to select");}voidui_suspend(void){endwin();kill(getpid(), SIGSTOP);refresh();clear();rearrange_windows();}voidui_end(void){endwin();}
Omar Polo