#include <stdlib.h>
+#include <stdint.h>
#include <ncurses.h>
#include <string.h>
#include "windows.h"
-struct WinMeta init_win_meta (WINDOW * screen) {
+struct yx {
+ uint16_t y;
+ uint16_t x; };
+
+struct Corners {
+ struct yx tl;
+ struct yx tr;
+ struct yx bl;
+ struct yx br; };
+
+static void refit_pad (struct WinMeta *);
+static struct yx place_window (struct WinMeta *, struct Win *);
+static void update_windows (struct WinMeta *, struct Win *);
+static void destroy_window (struct Win *);
+static void draw_windows_borders (struct Win *, struct Win *, struct Corners *, uint16_t);
+static void draw_window_borders (struct Win *, char);
+static void draw_windows (struct Win *);
+static void draw_vertical_scroll_hint (struct WinMeta *, uint16_t, uint32_t, char);
+
+extern struct WinMeta init_win_meta (WINDOW * screen) {
// Create and populate WinMeta struct with sane default values.
struct WinMeta win_meta;
- win_meta.height = screen->_maxy + 1;
+ win_meta.screen = screen;
+ win_meta.height = getmaxy(screen);
+ win_meta.width = getmaxx(screen);
win_meta.chain_start = 0;
win_meta.chain_end = 0;
+ win_meta.pad_offset = 0;
+ win_meta.pad = newpad(win_meta.height, 1);
+ win_meta.active = 0;
return win_meta; }
-struct Win init_window (struct WinMeta * win_meta, char * title) {
+extern struct Win init_window (struct WinMeta * win_meta, char * title, void * data, void * func) {
// Create and populate Win struct with sane default values.
struct Win win;
win.prev = 0;
win.next = 0;
- win.curses_win = 0;
+ win.curses = 0;
win.title = title;
win.width = 20;
- win.height = win_meta->height;
+ win.height = win_meta->height - 1;
+ win.data = data;
+ win.draw = func;
return win; }
-void append_window (struct WinMeta * win_meta, struct Win * win) {
+extern void append_window (struct WinMeta * win_meta, struct Win * win) {
// Append win to window chain. Set active, if first window. Update geometry of windows from new window on.
if (0 != win_meta->chain_start) {
win->prev = win_meta->chain_end;
win_meta->active = win;
win_meta->chain_start = win; }
win_meta->chain_end = win;
- update_windows(win_meta, win);
- draw_all_windows(win_meta); }
+ update_windows(win_meta, win); }
-void suspend_window (struct WinMeta * win_meta, struct Win * win) {
-// Destroy win, suspend from window chain. Update geometry of following rows, as well as activity selection.
+static void refit_pad (struct WinMeta * win_meta) {
+// Fit pad width to minimum width demanded by current windows' geometries.
+ uint16_t lastwincol = 0;
+ struct Win * win_p = win_meta->chain_start;
+ while (win_p != 0) {
+ if (win_p->startx + win_p->width > lastwincol + 1)
+ lastwincol = win_p->startx + win_p->width - 1;
+ win_p = win_p->next; }
+ if (getmaxx(win_meta->pad) != lastwincol)
+ wresize(win_meta->pad, getmaxy(win_meta->pad), lastwincol + 2); }
+
+extern void suspend_window (struct WinMeta * win_meta, struct Win * win) {
+// Destroy win, suspend from chain. Update geometry of following rows and pad, as well as activity selection.
destroy_window(win);
- if (win_meta->chain_start != win) // Give win's position in the chain to element next to it in the chain.
+ if (win_meta->chain_start != win) // Give win's position in the chain to element next to it in the chain.
win->prev->next = win->next;
else
win_meta->chain_start = win->next;
- if (win_meta->chain_end != win) { // Let chain element next to win know its new predecessor.
+ char pad_refitted = 0;
+ if (win_meta->chain_end != win) { // Let chain element next to win know its new predecessor.
win->next->prev = win->prev;
- if (win_meta->active == win) // If win was active, shift active window pointer to ...
- win_meta->active = win->next; // ... the next chain element, if that is a window ...
- update_windows(win_meta, win->next); }
+ if (win_meta->active == win) // If win was active, shift active window pointer to
+ win_meta->active = win->next; // the next chain element, if that is a window ...
+ update_windows(win_meta, win->next);
+ pad_refitted = 1; }
else {
win_meta->chain_end = win->prev;
- if (win_meta->active == win) // ... or else to the previous element.
+ if (win_meta->active == win) // ... or else to the previous element.
win_meta->active = win->prev; }
win->prev = 0;
win->next = 0;
- if (0 != win_meta->chain_start)
- draw_all_windows(win_meta); }
+ if (0 == pad_refitted) // Refit pad if necessary.
+ refit_pad(win_meta); }
-void place_window (struct WinMeta * win_meta, struct Win * win) {
+static struct yx place_window (struct WinMeta * win_meta, struct Win * win) {
// Based on position and sizes of previous window, find fitting place for current window.
- win->start_x = 0; // if window is first in chain, place it on top-left corner
- win->start_y = 0;
+ struct yx start;
+ start.x = 0; // if window is first in chain, place it on top-left corner
+ start.y = 1;
if (0 != win->prev) {
- if (win->prev->height == win_meta->height) // if prev window fills entire column, place win
- win->start_x = win->prev->start_x + win->prev->width; // in new column next to it
+ struct Win * win_top = win->prev;
+ while (win_top->starty != 1)
+ win_top = win_top->prev; // else, default to placing window in new top
+ start.x = win_top->startx + win_top->width + 1; // column to the right of the last one
+ uint16_t winprev_maxy = win->prev->starty + getmaxy(win->prev->curses);
+ if (win->width <= win->prev->width && win->height < win_meta->height - winprev_maxy) {
+ start.x = win->prev->startx; // place window below previous window if it fits
+ start.y = winprev_maxy + 1; } // vertically and is not wider than its predecessor
else {
- struct Win * first_ceiling = win->prev; // first_ceiling determines column with;
- while (first_ceiling->start_y != 0) // default: place window in new column
- first_ceiling = first_ceiling->prev; // next to it
- win->start_x = first_ceiling->start_x + first_ceiling->width;
- if (first_ceiling->width >= win->width) { // only place windows in prev column that fit into its width
- struct Win * win_p = first_ceiling;
- struct Win * lastrow_startwin = win_p;
- while (win_p != win) {
- if (win_p->start_x == first_ceiling->start_x)
- lastrow_startwin = win_p; // try to fit window at the end of the last
- win_p = win_p ->next; } // row of windows inside the column; if
- int lastcol_start = win->prev->start_x + win->prev->width; // that fails, try to open a new row below
- if (win->width <= first_ceiling->start_x + first_ceiling->width - lastcol_start
- && win->height <= lastrow_startwin->height) {
- win->start_x = lastcol_start;
- win->start_y = lastrow_startwin->start_y; }
- else if (win->height <= win_meta->height - (lastrow_startwin->start_y + lastrow_startwin->height)
- && win->width <= first_ceiling->width) {
- win->start_x = first_ceiling->start_x;
- win->start_y = lastrow_startwin->start_y + lastrow_startwin->height; } } } } }
-
-void update_windows (struct WinMeta * win_meta, struct Win * win) {
-// Update geometry of win and its next of kin. Before, destroy window, if visible. After, (re-)build it.
- if (0 != win->curses_win)
+ struct Win * win_up = win->prev;
+ struct Win * win_upup = win_up;
+ uint16_t widthdiff;
+ while (win_up != win_top) {
+ win_upup = win_up->prev;
+ while (1) {
+ if (win_up->starty != win_upup->starty)
+ break;
+ win_upup = win_upup->prev; }
+ winprev_maxy = win_upup->starty + getmaxy(win_upup->curses);
+ widthdiff = (win_upup->startx + win_upup->width) - (win_up->startx + win_up->width);
+ if (win->height < win_meta->height - winprev_maxy && win->width < widthdiff) {
+ start.x = win_up->startx + win_up->width + 1; // else try to open new sub column under last
+ start.y = winprev_maxy + 1; // window below which enough space remains
+ break; }
+ win_up = win_upup; } } }
+ return start; }
+
+static void update_windows (struct WinMeta * win_meta, struct Win * win) {
+// Update geometry of win and its next of kin. Destroy (if visible), (re-)build window. If need, resize pad.
+ if (0 != win->curses)
destroy_window (win);
- place_window(win_meta, win);
- if (win->start_y + win->height < win_meta->height) // dependent on window position,
- win->border_down = 1; // append space for borders to be drawn
- else
- win->border_down = 0;
- if (win->start_x > 0)
- win->border_left = 1;
- else
- win->border_left = 0;
- win->curses_win = newwin(win->height + win->border_down, win->width + win->border_left, win->start_y, win->start_x - win->border_left);
+ struct yx startyx = place_window(win_meta, win);
+ win->startx = startyx.x;
+ win->starty = startyx.y;
+ refit_pad(win_meta);
+ win->curses = subpad(win_meta->pad, win->height, win->width, startyx.y, startyx.x);
if (0 != win->next)
update_windows (win_meta, win->next); }
-void destroy_window (struct Win * win) {
-// Undraw and delete window.
- undraw_window (win->curses_win);
- delwin(win->curses_win);
- win->curses_win = 0; }
+static void destroy_window (struct Win * win) {
+// Delete window.
+ delwin(win->curses);
+ win->curses = 0; }
-void draw_windows (struct WinMeta * win_meta, struct Win * win) {
-// Draw all windows from the current one on.
- draw_window(win_meta, win);
- if (0 != win->next)
- draw_windows (win_meta, win->next); }
-
-void draw_all_windows (struct WinMeta * win_meta) {
-// Draw all windows from the chain start on.
- if (win_meta->chain_start)
- draw_windows (win_meta, win_meta->chain_start); }
-
-void draw_window(struct WinMeta * win_meta, struct Win * win) {
-// Draw win's content, including border and title (the latter dependent on space available for it).
- char ls = '|';
- char rs = '|';
- char ts = '-';
- char bs = '-';
- char tl = '-';
- char tr = '+';
- char bl = '|';
- char br = '|';
- if (1 == win->border_down) {
- bl = '+';
- br = '+'; }
- if (1 == win->border_left)
- tl = '+';
- wborder(win->curses_win, ls, rs, ts, bs, tl, tr, bl, br);
- char min_title_length_visible = 3; // 1 char minimal, plus 2 chars for decoration left/right of title
- if (win->width > min_title_length_visible) {
- int title_length = strlen(win->title);
- int title_offset = (((win->width) - (title_length + 2)) / 2) + win->border_left; // + 2 is for decoration
- if (title_offset < win->border_left)
- title_offset = win->border_left;
- int length_visible = strnlen(win->title, win->width - min_title_length_visible);
+static void draw_window_borders (struct Win * win, char active) {
+// Draw borders of window win, including title. Decorate in a special way if window is marked as active.
+ uint16_t y, x;
+ for (y = win->starty; y <= win->starty + win->height; y++) {
+ mvwaddch(wgetparent(win->curses), y, win->startx - 1, '|');
+ mvwaddch(wgetparent(win->curses), y, win->startx + win->width, '|'); }
+ for (x = win->startx; x <= win->startx + win->width; x++) {
+ mvwaddch(wgetparent(win->curses), win->starty - 1, x, '-');
+ mvwaddch(wgetparent(win->curses), win->starty + win->height, x, '-'); }
+ char min_title_length_visible = 3; // 1 char minimal, plus 2 chars for decoration left/right of title
+ if (win->width >= min_title_length_visible) {
+ uint16_t title_offset = 0;
+ if (win->width > strlen(win->title) + 2)
+ title_offset = (win->width - (strlen(win->title) + 2)) / 2; // + 2 is for decoration
+ uint16_t length_visible = strnlen(win->title, win->width - 2);
char title[length_visible + 3];
char decoration = ' ';
- if (win_meta->active == win)
+ if (1 == active)
decoration = '$';
memcpy(title + 1, win->title, length_visible);
title[0] = title[length_visible + 1] = decoration;
title[length_visible + 2] = '\0';
- mvwaddstr(win->curses_win, 0, title_offset, title); }
- if (win->height > 1 && win->width > 1) ;
- win->draw(win);
- wrefresh(win->curses_win); }
-
-void undraw_window (WINDOW * win) {
-// Fill entire window with whitespace.
- int y, x;
- for (y = 0; y <= win->_maxy; y++)
- for (x = 0; x <= win->_maxx; x++)
- mvwaddch(win, y, x, ' ');
- wrefresh(win); }
-
-void resize_window (struct WinMeta * win_meta, char change) {
+ mvwaddstr(wgetparent(win->curses), win->starty - 1, win->startx + title_offset, title); } }
+
+static void draw_windows_borders (struct Win * win, struct Win * win_active, struct Corners * corners, uint16_t ccount) {
+// Craw draw_window_borders() for all windows in chain from win on. Save current window's border corners.
+ char active = 0;
+ if (win == win_active)
+ active = 1;
+ draw_window_borders(win, active);
+ corners[ccount].tl.y = win->starty - 1;
+ corners[ccount].tl.x = win->startx - 1;
+ corners[ccount].tr.y = win->starty - 1;
+ corners[ccount].tr.x = win->startx + win->width;
+ corners[ccount].bl.y = win->starty + win->height;
+ corners[ccount].bl.x = win->startx - 1;
+ corners[ccount].br.y = win->starty + win->height;
+ corners[ccount].br.x = win->startx + win->width;
+ if (0 != win->next) {
+ draw_windows_borders (win->next, win_active, corners, ccount + 1); } }
+
+static void draw_windows (struct Win * win) {
+// Draw contents of all windows in window chain from win on.
+ win->draw(win);
+ if (0 != win->next) {
+ draw_windows (win->next); } }
+
+static void draw_vertical_scroll_hint (struct WinMeta * win_meta, uint16_t x, uint32_t more_cols, char dir) {
+// Draw scroll hint line in win at col x of pad display, announce more_cols more columns in direction dir.
+ uint16_t y, offset;
+ char phrase[] = "more columns";
+ char * scrolldesc = malloc((3 * sizeof(char)) + strlen(phrase) + 10); // 10 = max chars for uint32_t string
+ sprintf(scrolldesc, " %d %s ", more_cols, phrase);
+ offset = 1;
+ if (win_meta->height > (strlen(scrolldesc) + 1))
+ offset = (win_meta->height - strlen(scrolldesc)) / 2;
+ for (y = 0; y < win_meta->height; y++)
+ if (y >= offset && y < strlen(scrolldesc) + offset)
+ mvwaddch(win_meta->pad, y, x, scrolldesc[y - offset] | A_REVERSE);
+ else
+ mvwaddch(win_meta->pad, y, x, dir | A_REVERSE);
+ free(scrolldesc); }
+
+extern void draw_all_windows (struct WinMeta * win_meta) {
+// Draw pad with all windows and their borders, plus scrolling hints.
+ erase();
+ wnoutrefresh(win_meta->screen);
+ werase(win_meta->pad);
+ if (win_meta->chain_start) {
+ uint16_t n_wins = 1;
+ struct Win * win_p = win_meta->chain_start;
+ while (0 != win_p->next) {
+ win_p = win_p->next;
+ n_wins++; }
+ struct Corners * all_corners = malloc(sizeof(struct Corners) * n_wins);
+ draw_windows (win_meta->chain_start);
+ draw_windows_borders (win_meta->chain_start, win_meta->active, all_corners, 0);
+ uint16_t i;
+ for (i = 0; i < n_wins; i++) {
+ mvwaddch(win_meta->pad, all_corners[i].tl.y, all_corners[i].tl.x, '+');
+ mvwaddch(win_meta->pad, all_corners[i].tr.y, all_corners[i].tr.x, '+');
+ mvwaddch(win_meta->pad, all_corners[i].bl.y, all_corners[i].bl.x, '+');
+ mvwaddch(win_meta->pad, all_corners[i].br.y, all_corners[i].br.x, '+'); }
+ free(all_corners);
+ uint16_t y;
+ if (win_meta->pad_offset > 0)
+ draw_vertical_scroll_hint(win_meta, win_meta->pad_offset, win_meta->pad_offset + 1, '<');
+ if (win_meta->pad_offset + win_meta->width < getmaxx(win_meta->pad) - 1)
+ for (y = 0; y < win_meta->height; y++)
+ draw_vertical_scroll_hint(win_meta, win_meta->pad_offset + win_meta->width - 1,
+ getmaxx(win_meta->pad) - (win_meta->pad_offset + win_meta->width), '>');
+ pnoutrefresh(win_meta->pad, 0, win_meta->pad_offset, 0, 0, win_meta->height, win_meta->width - 1); }
+ doupdate(); }
+
+extern void resize_active_window (struct WinMeta * win_meta, uint16_t height, uint16_t width) {
// Grow or shrink currently active window. Correct its geometry and that of its followers.
- if (change == '-' && win_meta->active->height > 2)
- win_meta->active->height--;
- else if (change == '+' && win_meta->active->height < win_meta->height)
- win_meta->active->height++;
- else if (change == '_' && win_meta->active->width > 2)
- win_meta->active->width--;
- else if (change == '*')
- win_meta->active->width++;
- update_windows(win_meta, win_meta->chain_start);
- draw_all_windows(win_meta); }
-
-void cycle_active_window (struct WinMeta * win_meta, char dir) {
+ if (0 != win_meta->active && width > 0 && height > 0 && height < win_meta->height) {
+ win_meta->active->height = height;
+ win_meta->active->width = width;
+ update_windows(win_meta, win_meta->chain_start); } }
+
+extern void cycle_active_window (struct WinMeta * win_meta, char dir) {
// Cycle active window selection forwards (dir = 'n') or backwards.
- if ('n' == dir) {
- if (win_meta->active->next != 0)
- win_meta->active = win_meta->active->next;
- else
- win_meta->active = win_meta->chain_start; }
- else {
- if (win_meta->active->prev != 0)
- win_meta->active = win_meta->active->prev;
- else
- win_meta->active = win_meta->chain_end; }
- draw_all_windows(win_meta); }
+ if (0 != win_meta->active) {
+ if ('n' == dir) {
+ if (win_meta->active->next != 0)
+ win_meta->active = win_meta->active->next;
+ else
+ win_meta->active = win_meta->chain_start; }
+ else {
+ if (win_meta->active->prev != 0)
+ win_meta->active = win_meta->active->prev;
+ else
+ win_meta->active = win_meta->chain_end; } } }
-void shift_window (struct WinMeta * win_meta, char dir) {
+extern void shift_active_window (struct WinMeta * win_meta, char dir) {
// Move active window forward/backward in window chain. If jumping beyond start/end, move to other chain end.
- if (win_meta->chain_start != win_meta->chain_end && (dir == 'f' || dir == 'b')) {
- int i, i_max;
- struct Win * win_shift = win_meta->active;
+ if (0 != win_meta->active && win_meta->chain_start != win_meta->chain_end && (dir == 'f' || dir == 'b')) {
+ struct Win * win_shift = win_meta->active, * win_p, * win_p_next;
char wrap = 0;
if ((dir == 'f' && win_shift == win_meta->chain_end)
|| (dir == 'b' && win_shift == win_meta->chain_start))
wrap = 1;
- struct Win * win_p, * win_p_next;
- for (i_max = 1, win_p = win_meta->chain_start; win_p != win_meta->chain_end; i_max++, win_p = win_p->next);
+ uint16_t i, i_max;
+ for (i_max = 1, win_p = win_meta->chain_start; win_p != win_meta->chain_end; i_max++)
+ win_p = win_p->next;
struct Win ** wins = malloc(i_max * sizeof(struct Win *));
for (i = 0, win_p = win_meta->chain_start; i < i_max; i++) {
win_p_next = win_p->next;
else
append_window(win_meta, wins[i]);
free(wins);
- win_meta->active = win_shift;
- draw_all_windows(win_meta); } }
+ win_meta->active = win_shift; } }
+
+extern void reset_pad_offset(struct WinMeta * win_meta, uint16_t new_offset) {
+// Apply new_offset to windows pad, if it proves to be sane.
+ if (new_offset >= 0 && new_offset + win_meta->width < getmaxx(win_meta->pad))
+ win_meta->pad_offset = new_offset; }
projects / plomrogue / blobdiff