diff options
Diffstat (limited to 'dselect/baselist.cc')
| -rw-r--r-- | dselect/baselist.cc | 467 |
1 files changed, 467 insertions, 0 deletions
diff --git a/dselect/baselist.cc b/dselect/baselist.cc new file mode 100644 index 0000000..6fd7692 --- /dev/null +++ b/dselect/baselist.cc @@ -0,0 +1,467 @@ +/* + * dselect - Debian package maintenance user interface + * baselist.cc - list of somethings + * + * Copyright © 1994,1995 Ian Jackson <ijackson@chiark.greenend.org.uk> + * Copyright © 2001 Wichert Akkerman <wakkerma@debian.org> + * Copyright © 2007-2013 Guillem Jover <guillem@debian.org> + * + * This is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include <config.h> +#include <compat.h> + +#include <sys/ioctl.h> + +#include <errno.h> +#include <string.h> +#include <termios.h> +#include <unistd.h> +#include <stdio.h> + +#include <dpkg/i18n.h> +#include <dpkg/c-ctype.h> +#include <dpkg/dpkg.h> +#include <dpkg/dpkg-db.h> + +#include "dselect.h" +#include "bindings.h" + +void mywerase(WINDOW *win) { + int my,mx,y,x; + getmaxyx(win,my,mx); + for (y=0; y<my; y++) { + wmove(win,y,0); for (x=0; x<mx; x++) waddch(win,' '); + } + wmove(win,0,0); +} + +baselist *baselist::signallist = nullptr; +void baselist::sigwinchhandler(int) { + int save_errno = errno; + struct winsize size; + debug(dbg_general, "baselist::sigwinchhandler(), signallist=%p", signallist); + baselist *p= signallist; + p->enddisplay(); + endwin(); initscr(); + if (ioctl(fileno(stdout), TIOCGWINSZ, &size) != 0) ohshite(_("ioctl(TIOCGWINSZ) failed")); + resizeterm(size.ws_row, size.ws_col); wrefresh(curscr); + p->startdisplay(); + if (doupdate() == ERR) ohshite(_("doupdate in SIGWINCH handler failed")); + errno = save_errno; +} + +static void cu_sigwinch(int, void **argv) { + struct sigaction *osigactp= (struct sigaction*)argv[0]; + sigset_t *oblockedp= (sigset_t*)argv[1]; + + if (sigaction(SIGWINCH, osigactp, nullptr)) + ohshite(_("failed to restore old SIGWINCH sigact")); + delete osigactp; + if (sigprocmask(SIG_SETMASK, oblockedp, nullptr)) + ohshite(_("failed to restore old signal mask")); + delete oblockedp; +} + +void +baselist::sigwinch_mask(int how) +{ + sigset_t sigwinchset; + sigemptyset(&sigwinchset); + sigaddset(&sigwinchset,SIGWINCH); + + int rc = sigprocmask(how, &sigwinchset, nullptr); + if (rc < 0) { + if (how == SIG_UNBLOCK) + ohshite(_("failed to unblock SIGWINCH")); + else + ohshite(_("failed to block SIGWINCH")); + } +} + +void +baselist::setupsigwinch() +{ + struct sigaction *osigactp = new(struct sigaction); + sigset_t *oblockedp = new(sigset_t); + if (sigprocmask(0, nullptr, oblockedp)) + ohshite(_("failed to get old signal mask")); + if (sigaction(SIGWINCH, nullptr, osigactp)) + ohshite(_("failed to get old SIGWINCH sigact")); + + push_cleanup(cu_sigwinch, ~0, 2, osigactp, oblockedp); + + sigwinch_mask(SIG_BLOCK); + + struct sigaction nsigact; + memset(&nsigact,0,sizeof(nsigact)); + nsigact.sa_handler= sigwinchhandler; + sigemptyset(&nsigact.sa_mask); +//nsigact.sa_flags= SA_INTERRUPT; + if (sigaction(SIGWINCH, &nsigact, nullptr)) + ohshite(_("failed to set new SIGWINCH sigact")); +} + +void +baselist::add_column(column &col, const char *title, int width) +{ + col.title = title; + col.x = col_cur_x; + col.width = width; + + col_cur_x += col.width + gap_width; +} + +void +baselist::end_column(column &col, const char *title) +{ + col.title = title; + col.x = col_cur_x; + col.width = total_width - col.x; + + col_cur_x += col.width + gap_width; +} + +void +baselist::draw_column_head(column &col) +{ + mvwaddnstr(colheadspad, 0, col.x, col.title, col.width); +} + +void +baselist::draw_column_sep(column &col, int y) +{ + mvwaddch(listpad, y, col.x - 1, ' '); +} + +void +baselist::draw_column_item(column &col, int y, const char *item) +{ + mvwprintw(listpad, y, col.x, "%-*.*s", col.width, col.width, item); +} + +void baselist::setheights() { + int y= ymax - (title_height + colheads_height + thisstate_height); + + if (y < 1) + internerr("widget y=%d < 1", y); + + if (showinfo==2 && y>=7) { + list_height= 5; + whatinfo_height= 1; + info_height= y-6; + } else if (showinfo==1 && y>=10) { + list_height= y/2; + info_height= (y-1)/2; + whatinfo_height= 1; + } else { + list_height= y; + info_height= 0; + whatinfo_height= 0; + } + colheads_row= title_height; + list_row= colheads_row + colheads_height; + thisstate_row= list_row + list_height; + info_row= thisstate_row + thisstate_height; + whatinfo_row= ymax - 1; +} + +void baselist::startdisplay() { + debug(dbg_general, "baselist[%p]::startdisplay()", this); + cbreak(); noecho(); nonl(); keypad(stdscr,TRUE); + clear(); wnoutrefresh(stdscr); + + // find attributes + if (has_colors() && start_color()==OK && COLOR_PAIRS >= numscreenparts) { + int i; + printf("allocing\n"); + for (i = 1; i < numscreenparts; i++) { + if (init_pair(i, color[i].fore, color[i].back) != OK) + ohshite(_("failed to allocate colour pair")); + part_attr[i] = COLOR_PAIR(i) | color[i].attr; + } + } else { + /* User defined attributes for B&W mode are not currently supported. */ + part_attr[title] = A_REVERSE; + part_attr[thisstate] = A_STANDOUT; + part_attr[list] = 0; + part_attr[listsel] = A_STANDOUT; + part_attr[selstate] = A_BOLD; + part_attr[selstatesel] = A_STANDOUT; + part_attr[colheads]= A_BOLD; + part_attr[query] = part_attr[title]; + part_attr[info_body] = part_attr[list]; + part_attr[info_head] = A_BOLD; + part_attr[whatinfo] = part_attr[thisstate]; + part_attr[helpscreen] = A_NORMAL; + } + + // set up windows and pads, based on screen size + getmaxyx(stdscr,ymax,xmax); + title_height= ymax>=6; + colheads_height= ymax>=5; + thisstate_height= ymax>=3; + + setheights(); + setwidths(); + + titlewin= newwin(1,xmax, 0,0); + if (!titlewin) ohshite(_("failed to create title window")); + wattrset(titlewin, part_attr[title]); + + whatinfowin= newwin(1,xmax, whatinfo_row,0); + if (!whatinfowin) ohshite(_("failed to create whatinfo window")); + wattrset(whatinfowin, part_attr[whatinfo]); + + listpad = newpad(ymax, total_width); + if (!listpad) ohshite(_("failed to create baselist pad")); + + colheadspad= newpad(1, total_width); + if (!colheadspad) ohshite(_("failed to create heading pad")); + wattrset(colheadspad, part_attr[colheads]); + + thisstatepad= newpad(1, total_width); + if (!thisstatepad) ohshite(_("failed to create thisstate pad")); + wattrset(thisstatepad, part_attr[thisstate]); + + infopad= newpad(MAX_DISPLAY_INFO, total_width); + if (!infopad) ohshite(_("failed to create info pad")); + wattrset(infopad, part_attr[info_body]); + wbkgdset(infopad, ' ' | part_attr[info_body]); + + querywin= newwin(1,xmax,ymax-1,0); + if (!querywin) ohshite(_("failed to create query window")); + wbkgdset(querywin, ' ' | part_attr[query]); + + if (cursorline >= topofscreen + list_height) topofscreen= cursorline; + if (topofscreen > nitems - list_height) topofscreen= nitems - list_height; + if (topofscreen < 0) topofscreen= 0; + + infotopofscreen= 0; leftofscreen= 0; + + redrawall(); + + debug(dbg_general, + "baselist::startdisplay() done ...\n\n" + " xmax=%d, ymax=%d;\n\n" + " title_height=%d, colheads_height=%d, list_height=%d;\n" + " thisstate_height=%d, info_height=%d, whatinfo_height=%d;\n\n" + " colheads_row=%d, thisstate_row=%d, info_row=%d;\n" + " whatinfo_row=%d, list_row=%d;\n\n", + xmax, ymax, title_height, colheads_height, list_height, + thisstate_height, info_height, whatinfo_height, + colheads_row, thisstate_row, info_row, whatinfo_row, list_row); +} + +void baselist::enddisplay() { + delwin(titlewin); + delwin(whatinfowin); + delwin(listpad); + delwin(colheadspad); + delwin(thisstatepad); + delwin(infopad); + wmove(stdscr,ymax,0); wclrtoeol(stdscr); + listpad = nullptr; + col_cur_x = 0; +} + +void baselist::redrawall() { + redrawtitle(); + redrawcolheads(); + wattrset(listpad, part_attr[list]); + mywerase(listpad); + ldrawnstart= ldrawnend= -1; // start is first drawn; end is first undrawn; -1=none + refreshlist(); + redrawthisstate(); + redrawinfo(); +} + +void baselist::redraw1item(int index) { + redraw1itemsel(index, index == cursorline); +} + +baselist::baselist(keybindings *kb) { + debug(dbg_general, "baselist[%p]::baselist()", this); + + bindings= kb; + nitems= 0; + + col_cur_x = 0; + gap_width = 1; + total_width = max(TOTAL_LIST_WIDTH, COLS); + + xmax= -1; + ymax = -1; + + list_height = 0; + info_height = 0; + title_height = 0; + whatinfo_height = 0; + colheads_height = 0; + thisstate_height = 0; + + list_row = 0; + info_row = 0; + whatinfo_row = 0; + colheads_row = 0; + thisstate_row = 0; + + topofscreen = 0; + leftofscreen = 0; + infotopofscreen = 0; + infolines = 0; + + listpad = nullptr; + infopad = nullptr; + colheadspad = nullptr; + thisstatepad = nullptr; + titlewin = nullptr; + querywin = nullptr; + whatinfowin = nullptr; + + cursorline = -1; + ldrawnstart = 0; + ldrawnend = 0; + showinfo= 1; + + searchstring[0]= 0; +} + +void baselist::itd_keys() { + whatinfovb(_("Keybindings")); + + const int givek= xmax/3; + bindings->describestart(); + const char **ta; + while ((ta = bindings->describenext()) != nullptr) { + const char **tap= ta+1; + for (;;) { + waddstr(infopad, gettext(*tap)); + tap++; if (!*tap) break; + waddstr(infopad, ", "); + } + int y,x; + getyx(infopad,y,x); + if (x >= givek) y++; + mvwaddstr(infopad, y,givek, ta[0]); + waddch(infopad,'\n'); + delete [] ta; + } +} + +void baselist::dosearch() { + int offset, index; + debug(dbg_general, "baselist[%p]::dosearch(); searchstring='%s'", + this, searchstring); + for (offset = 1, index = max(topofscreen, cursorline + 1); + offset<nitems; + offset++, index++) { + if (index >= nitems) index -= nitems; + if (matchsearch(index)) { + topofscreen= index-1; + if (topofscreen > nitems - list_height) topofscreen= nitems-list_height; + if (topofscreen < 0) topofscreen= 0; + setcursor(index); + return; + } + } + beep(); +} + +void baselist::refreshinfo() { + pnoutrefresh(infopad, infotopofscreen,leftofscreen, info_row,0, + min(info_row + info_height - 1, info_row + MAX_DISPLAY_INFO - 1), + min(total_width - leftofscreen - 1, xmax - 1)); + + if (whatinfo_height) { + mywerase(whatinfowin); + mvwaddstr(whatinfowin,0,0, whatinfovb.string()); + if (infolines > info_height) { + wprintw(whatinfowin,_(" -- %d%%, press "), + (int)((infotopofscreen + info_height) * 100.0 / infolines)); + if (infotopofscreen + info_height < infolines) { + wprintw(whatinfowin,_("%s for more"), bindings->find("iscrollon")); + if (infotopofscreen) waddstr(whatinfowin, ", "); + } + if (infotopofscreen) + wprintw(whatinfowin, _("%s to go back"),bindings->find("iscrollback")); + waddch(whatinfowin,'.'); + } + wnoutrefresh(whatinfowin); + } +} + +void baselist::wordwrapinfo(int offset, const char *m) { + int usemax= xmax-5; + debug(dbg_general, "baselist[%p]::wordwrapinfo(%d, '%s')", this, offset, m); + bool wrapping = false; + + for (;;) { + int offleft=offset; while (*m == ' ' && offleft>0) { m++; offleft--; } + const char *p = strchrnul(m, '\n'); + int l = (int)(p - m); + while (l && c_isspace(m[l - 1])) + l--; + if (!l || (*m == '.' && l == 1)) { + if (wrapping) waddch(infopad,'\n'); + waddch(infopad, '\n'); + wrapping = false; + } else if (*m == ' ' || usemax < 10) { + if (wrapping) waddch(infopad,'\n'); + waddnstr(infopad, m, l); + waddch(infopad, '\n'); + wrapping = false; + } else { + int x, y DPKG_ATTR_UNUSED; + + if (wrapping) { + getyx(infopad, y,x); + if (x+1 >= usemax) { + waddch(infopad,'\n'); + } else { + waddch(infopad,' '); + } + } + for (;;) { + getyx(infopad, y,x); + int dosend= usemax-x; + if (l <= dosend) { + dosend=l; + } else { + int i=dosend; + while (i > 0 && m[i] != ' ') i--; + if (i > 0 || x > 0) dosend=i; + } + if (dosend) waddnstr(infopad, m, dosend); + while (dosend < l && m[dosend] == ' ') dosend++; + l-= dosend; m+= dosend; + if (l <= 0) break; + waddch(infopad,'\n'); + } + wrapping = true; + } + if (*p == '\0') + break; + if (getcury(infopad) == (MAX_DISPLAY_INFO - 1)) { + waddstr(infopad, + "[The package description is too long and has been truncated...]"); + break; + } + m= ++p; + } + debug(dbg_general, "baselist[%p]::wordwrapinfo() done", this); +} + +baselist::~baselist() { } |