/* windows.c */
#include "windows.h"
-#include <stdint.h> /* for uint8_t, uint16_t, uint32_t */
+#include <stdint.h> /* for uint8_t, uint16_t, uint32_t, UINT16_MAX */
#include <ncurses.h> /* for typedefs WINDOW, chtype, wresize(), getmaxx(), */
/* getmaxy(), supbad(), delwin(), mvwaddch(), */
/* mvwaddstr(), newpad(), wnoutrefres(), erase(), */
/* Fit virtual screen's width to minimum width demanded by current windows'
- * geometries. Returns 0 on success, 1 on (pad memory allocation) error.
+ * geometries.
*/
static uint8_t refit_pad(struct WinMeta * wmeta);
/* Update geometry (sizes, positions) of window "w" and its successors in the
* window chain. For the positioning algorithm place_win() is used.
- *
- * update_wins() returns 0 on success, 1 on (pad/window memory alloc.) error.
*/
static uint8_t update_wins(struct WinMeta * wmeta, struct Win * w);
static void place_win(struct WinMeta * wmeta, struct Win * w);
-/* Destroy window "w"'s ncurses window (and set w.Frame.curses_win to 0). */
+/* Destroy window "w"'s ncurses WINDOW (and set w.Frame.curses_win to 0). */
static void destroy_win(struct Win * w);
/* draw_win_borderlines() draws the vertical and horizontal borders of window
* "w" sans corners into the virtual screen "pad", and draws the top border
* line as the windows' title bar (highlighted if the window is described
- * active by "active" being set). draw_wins_borderlines().
+ * active by "active" being == 1).
*
* draw_wins_borderlines() calls draw_win_borderlines() recursively on all
* windows from "w" on. "w_active" is a pointer to the one window that
* draw_win_borderlines() is supposed to handle as the active window.
*
- * Finally, draw_wins_bordercorners draws into "pad" the borders of window "w"
+ * Finally, draw_wins_bordercorners() draws into "pad" the borders of window "w"
* and all its successors.
*/
static void draw_win_borderlines(struct Win * w, char active, WINDOW * pad);
static uint8_t refit_pad(struct WinMeta * wmeta)
{
/* Determine rightmost window column. */
- uint16_t lastwincol = 0;
- struct Win * w_p = wmeta->chain_start;
+ uint32_t lastwincol = 0;
+ struct Win * w_p = wmeta->_chain_start;
while (w_p != 0)
{
- if (w_p->start.x + w_p->frame.size.x > lastwincol + 1)
+ if ((uint32_t) w_p->_start.x + (uint32_t) w_p->frame.size.x
+ > lastwincol + 1)
{
- lastwincol = w_p->start.x + w_p->frame.size.x - 1;
+ lastwincol = (uint32_t) w_p->_start.x
+ + (uint32_t) w_p->frame.size.x - 1;
}
- w_p = w_p->next;
+ w_p = w_p->_next;
}
/* Only resize the pad if the rightmost window column has changed. */
if (getmaxx(wmeta->padframe.curses_win) != lastwincol)
{
+ if (lastwincol + 2 > UINT16_MAX)
+ {
+ return 2;
+ }
return (ERR == wresize(wmeta->padframe.curses_win,
getmaxy(wmeta->padframe.curses_win),
lastwincol + 2));
destroy_win(w);
}
place_win(wmeta, w);
- if (0 != refit_pad(wmeta))
+ uint8_t test_refit = refit_pad(wmeta);
+ if (0 != test_refit)
{
- return 1;
+ return test_refit;
}
- WINDOW * test = subpad(wmeta->padframe.curses_win,
- w->frame.size.y, w->frame.size.x,
- w->start.y, w->start.x);
- if (NULL == test)
+ WINDOW * subpad_test = subpad(wmeta->padframe.curses_win,
+ w->frame.size.y, w->frame.size.x,
+ w->_start.y, w->_start.x);
+ if (NULL == subpad_test)
{
return 1;
}
- w->frame.curses_win = test;
- if (0 != w->next)
+ w->frame.curses_win = subpad_test;
+ if (0 != w->_next)
{
- return update_wins(wmeta, w->next);
+ return update_wins(wmeta, w->_next);
}
return 0;
}
static void place_win(struct WinMeta * wmeta, struct Win * w)
{
/* First window goes into the upper-left corner. */
- w->start.x = 0;
- w->start.y = 1; /* Leave space for title bar. */
- if (0 != w->prev)
+ w->_start.x = 0;
+ w->_start.y = 1; /* Leave space for title bar. */
+ if (0 != w->_prev)
{
/* Non-first window fallbacks to: fit rightwards of rightmost border. */
- struct Win * w_top = w->prev;
- while (w_top->start.y != 1)
+ struct Win * w_top = w->_prev;
+ while (w_top->_start.y != 1)
{
- w_top = w_top->prev;
+ w_top = w_top->_prev;
}
- w->start.x = w_top->start.x + w_top->frame.size.x + 1;
+ w->_start.x = w_top->_start.x + w_top->frame.size.x + 1;
/* Fit window below its predecessor if that one directly thrones over
* empty space wide and high enough.
*/
- uint16_t w_prev_maxy = w->prev->start.y
- + getmaxy(w->prev->frame.curses_win);
- if ( w->frame.size.x <= w->prev->frame.size.x
+ uint16_t w_prev_maxy = w->_prev->_start.y
+ + getmaxy(w->_prev->frame.curses_win);
+ if ( w->frame.size.x <= w->_prev->frame.size.x
&& w->frame.size.y < wmeta->padframe.size.y - w_prev_maxy)
{
- w->start.x = w->prev->start.x;
- w->start.y = w_prev_maxy + 1;
+ w->_start.x = w->_prev->_start.x;
+ w->_start.y = w_prev_maxy + 1;
}
/* Failing that, try to open a new sub column below the nearest
*/
else
{
- struct Win * w_up = w->prev;
+ struct Win * w_up = w->_prev;
struct Win * w_upup = w_up;
uint16_t widthdiff;
while (w_up != w_top)
{
- w_upup = w_up->prev;
+ w_upup = w_up->_prev;
while (1)
{
- if (w_up->start.y != w_upup->start.y)
+ if (w_up->_start.y != w_upup->_start.y)
{
break;
}
- w_upup = w_upup->prev;
+ w_upup = w_upup->_prev;
}
- w_prev_maxy = w_upup->start.y
+ w_prev_maxy = w_upup->_start.y
+ getmaxy(w_upup->frame.curses_win);
- widthdiff = (w_upup->start.x + w_upup->frame.size.x)
- - (w_up->start.x + w_up->frame.size.x);
+ widthdiff = (w_upup->_start.x + w_upup->frame.size.x)
+ - (w_up->_start.x + w_up->frame.size.x);
if ( w->frame.size.y < wmeta->padframe.size.y - w_prev_maxy
&& w->frame.size.x < widthdiff)
{
- w->start.x = w_up->start.x + w_up->frame.size.x + 1 ;
- w->start.y = w_prev_maxy + 1;
+ w->_start.x = w_up->_start.x + w_up->frame.size.x + 1 ;
+ w->_start.y = w_prev_maxy + 1;
break;
}
w_up = w_upup;
static void draw_wins(struct Win * w)
{
- w->draw(w);
- if (0 != w->next)
+ w->_draw(w);
+ if (0 != w->_next)
{
- draw_wins(w->next);
+ draw_wins(w->_next);
}
}
{
/* Draw vertical and horizontal border lines. */
uint16_t y, x;
- for (y = w->start.y; y <= w->start.y + w->frame.size.y; y++)
+ for (y = w->_start.y; y <= w->_start.y + w->frame.size.y; y++)
{
- mvwaddch(pad, y, w->start.x - 1, '|');
- mvwaddch(pad, y, w->start.x + w->frame.size.x, '|');
+ mvwaddch(pad, y, w->_start.x - 1, '|');
+ mvwaddch(pad, y, w->_start.x + w->frame.size.x, '|');
}
- for (x = w->start.x; x <= w->start.x + w->frame.size.x; x++)
+ for (x = w->_start.x; x <= w->_start.x + w->frame.size.x; x++)
{
- mvwaddch(pad, w->start.y - 1, x, '-');
- mvwaddch(pad, w->start.y + w->frame.size.y, x, '-');
+ mvwaddch(pad, w->_start.y - 1, x, '-');
+ mvwaddch(pad, w->_start.y + w->frame.size.y, x, '-');
}
/* Draw as much as possible of the title into center of top border line. */
if (w->frame.size.x >= min_title_length_visible)
{
uint16_t title_offset = 0;
- if (w->frame.size.x > strlen(w->title) + 2)
+ if (w->frame.size.x > strlen(w->_title) + 2)
{
- title_offset = (w->frame.size.x - (strlen(w->title) + 2)) / 2;
- } /* +2 is for padding/decoration */
- uint16_t length_visible = strnlen(w->title, w->frame.size.x - 2);
+ title_offset = (w->frame.size.x - (strlen(w->_title) + 2)) / 2;
+ } /* +2 is for padding/decoration */
+ uint16_t length_visible = strnlen(w->_title, w->frame.size.x - 2);
char title[length_visible + 3];
char decoration = ' ';
if (1 == active)
{
decoration = '$';
}
- memcpy(title + 1, w->title, length_visible);
+ memcpy(title + 1, w->_title, length_visible);
title[0] = title[length_visible + 1] = decoration;
title[length_visible + 2] = '\0';
- mvwaddstr(pad, w->start.y - 1, w->start.x + title_offset, title);
+ mvwaddstr(pad, w->_start.y - 1, w->_start.x + title_offset, title);
}
}
active = 1;
}
draw_win_borderlines(w, active, pad);
- if (0 != w->next)
+ if (0 != w->_next)
{
- draw_wins_borderlines(w->next, w_active, pad);
+ draw_wins_borderlines(w->_next, w_active, pad);
}
}
static void draw_wins_bordercorners(struct Win * w, WINDOW * pad)
{
- mvwaddch(pad, w->start.y - 1, w->start.x - 1, '+');
- mvwaddch(pad, w->start.y - 1, w->start.x + w->frame.size.x, '+');
- mvwaddch(pad, w->start.y + w->frame.size.y, w->start.x - 1, '+');
+ mvwaddch(pad, w->_start.y - 1, w->_start.x - 1, '+');
+ mvwaddch(pad, w->_start.y - 1, w->_start.x + w->frame.size.x, '+');
+ mvwaddch(pad, w->_start.y + w->frame.size.y, w->_start.x - 1, '+');
mvwaddch(pad,
- w->start.y + w->frame.size.y, w->start.x + w->frame.size.x, '+');
- if (0 != w->next)
+ w->_start.y + w->frame.size.y, w->_start.x + w->frame.size.x, '+');
+ if (0 != w->_next)
{
- draw_wins_bordercorners(w->next, pad);
+ draw_wins_bordercorners(w->_next, pad);
}
}
static void shift_win_forward(struct WinMeta * wmeta)
{
- if (wmeta->active == wmeta->chain_end)
+ if (wmeta->active == wmeta->_chain_end)
{
- wmeta->chain_end = wmeta->active->prev;
- wmeta->chain_end->next = 0;
- wmeta->active->next = wmeta->chain_start;
- wmeta->active->next->prev = wmeta->active;
- wmeta->chain_start = wmeta->active;
- wmeta->chain_start->prev = 0;
+ wmeta->_chain_end = wmeta->active->_prev;
+ wmeta->_chain_end->_next = 0;
+ wmeta->active->_next = wmeta->_chain_start;
+ wmeta->active->_next->_prev = wmeta->active;
+ wmeta->_chain_start = wmeta->active;
+ wmeta->_chain_start->_prev = 0;
}
else
{
- struct Win * old_prev = wmeta->active->prev;
- struct Win * old_next = wmeta->active->next;
- if (wmeta->chain_end == wmeta->active->next)
+ struct Win * old_prev = wmeta->active->_prev;
+ struct Win * old_next = wmeta->active->_next;
+ if (wmeta->_chain_end == wmeta->active->_next)
{
- wmeta->chain_end = wmeta->active;
- wmeta->active->next = 0;
+ wmeta->_chain_end = wmeta->active;
+ wmeta->active->_next = 0;
}
else
{
- wmeta->active->next = old_next->next;
- wmeta->active->next->prev = wmeta->active;
+ wmeta->active->_next = old_next->_next;
+ wmeta->active->_next->_prev = wmeta->active;
}
- if (wmeta->chain_start == wmeta->active)
+ if (wmeta->_chain_start == wmeta->active)
{
- wmeta->chain_start = old_next;
+ wmeta->_chain_start = old_next;
}
else
{
- old_prev->next = old_next;
+ old_prev->_next = old_next;
}
- old_next->prev = old_prev;
- old_next->next = wmeta->active;
- wmeta->active->prev = old_next;
+ old_next->_prev = old_prev;
+ old_next->_next = wmeta->active;
+ wmeta->active->_prev = old_next;
}
}
static void shift_win_backward(struct WinMeta * wmeta)
{
- if (wmeta->active == wmeta->chain_start)
+ if (wmeta->active == wmeta->_chain_start)
{
- wmeta->chain_start = wmeta->active->next;
- wmeta->chain_start->prev = 0;
- wmeta->active->prev = wmeta->chain_end;
- wmeta->active->prev->next = wmeta->active;
- wmeta->chain_end = wmeta->active;
- wmeta->chain_end->next = 0;
+ wmeta->_chain_start = wmeta->active->_next;
+ wmeta->_chain_start->_prev = 0;
+ wmeta->active->_prev = wmeta->_chain_end;
+ wmeta->active->_prev->_next = wmeta->active;
+ wmeta->_chain_end = wmeta->active;
+ wmeta->_chain_end->_next = 0;
}
else
{
- struct Win * old_prev = wmeta->active->prev;
- struct Win * old_next = wmeta->active->next;
- if (wmeta->chain_start == wmeta->active->prev)
+ struct Win * old_prev = wmeta->active->_prev;
+ struct Win * old_next = wmeta->active->_next;
+ if (wmeta->_chain_start == wmeta->active->_prev)
{
- wmeta->chain_start = wmeta->active;
- wmeta->active->prev = 0;
+ wmeta->_chain_start = wmeta->active;
+ wmeta->active->_prev = 0;
}
else
{
- wmeta->active->prev = old_prev->prev;
- wmeta->active->prev->next = wmeta->active;
+ wmeta->active->_prev = old_prev->_prev;
+ wmeta->active->_prev->_next = wmeta->active;
}
- if (wmeta->chain_end == wmeta->active)
+ if (wmeta->_chain_end == wmeta->active)
{
- wmeta->chain_end = old_prev;
+ wmeta->_chain_end = old_prev;
}
else
{
- old_next->prev = old_prev;
+ old_next->_prev = old_prev;
}
- old_prev->next = old_next;
- old_prev->prev = wmeta->active;
- wmeta->active->next = old_prev;
+ old_prev->_next = old_next;
+ old_prev->_prev = wmeta->active;
+ wmeta->active->_next = old_prev;
}
}
extern uint8_t init_win_meta(WINDOW * screen, struct WinMeta * wmeta)
{
- wmeta->screen = screen;
- wmeta->padframe.size.y = getmaxy(screen);
- wmeta->padframe.size.x = getmaxx(screen);
- wmeta->chain_start = 0;
- wmeta->chain_end = 0;
+ wmeta->_screen = screen;
+ uint32_t maxy_test = getmaxy(screen);
+ uint32_t maxx_test = getmaxx(screen);
+ if (maxy_test > UINT16_MAX || maxx_test > UINT16_MAX)
+ {
+ return 2;
+ }
+ wmeta->padframe.size.y = maxy_test;
+ wmeta->padframe.size.x = maxx_test;
+ wmeta->_chain_start = 0;
+ wmeta->_chain_end = 0;
wmeta->pad_offset = 0;
- WINDOW * test;
- test = newpad(wmeta->padframe.size.y, 1);
- if (NULL == test)
+ WINDOW * pad_test = newpad(wmeta->padframe.size.y, 1);
+ if (NULL == pad_test)
{
return 1;
}
- wmeta->padframe.curses_win = test;
+ wmeta->padframe.curses_win = pad_test;
wmeta->active = 0;
return 0;
}
-extern struct Win init_win(struct WinMeta * wmeta, char * title,
- uint16_t height, uint16_t width,
- void * data, void * func)
+extern uint8_t init_win(struct WinMeta * wmeta, struct Win ** wp, char * title,
+ int16_t height, int16_t width,
+ void * data, void * func)
{
- struct Win w;
- w.prev = 0;
- w.next = 0;
- w.frame.curses_win = 0;
- w.title = title;
- w.data = data;
- w.draw = func;
- if (width > 0)
+ struct Win * w = malloc(sizeof(struct Win));
+ if (NULL == w)
{
- w.frame.size.x = width;
+ return 1;
+ }
+ w->_prev = 0;
+ w->_next = 0;
+ w->frame.curses_win = 0;
+ w->_title = malloc(strlen(title) + 1);
+ if (NULL == w->_title)
+ {
+ return 1;
+ }
+ sprintf(w->_title, "%s", title);
+ w->data = data;
+ w->_draw = func;
+ if (0 < width)
+ {
+ w->frame.size.x = width;
+ }
+ else if (0 > width)
+ {
+ w->frame.size.x = wmeta->padframe.size.x + width;
}
else
{
- w.frame.size.x = 1;
+ w->frame.size.x = wmeta->padframe.size.x;
+ }
+ if (0 < height && height <= wmeta->padframe.size.y - 1)
+ {
+ w->frame.size.y = height;
}
- if (height > 0 && height <= wmeta->padframe.size.y - 1)
+ else if (0 > height && wmeta->padframe.size.y + (height - 1) > 0)
{
- w.frame.size.y = height;
+ w->frame.size.y = wmeta->padframe.size.y + (height - 1);
}
else
{
- w.frame.size.y = wmeta->padframe.size.y - 1;
+ w->frame.size.y = wmeta->padframe.size.y - 1;
}
- return w;
+ *wp = w;
+ return 0;
+}
+
+
+
+extern void free_win(struct Win * win)
+{
+ free(win->_title);
+ free(win);
}
extern uint8_t append_win(struct WinMeta * wmeta, struct Win * w)
{
- if (0 != wmeta->chain_start)
+ if (0 != wmeta->_chain_start)
{
- w->prev = wmeta->chain_end;
- wmeta->chain_end->next = w;
+ w->_prev = wmeta->_chain_end;
+ wmeta->_chain_end->_next = w;
}
else
{
wmeta->active = w;
- wmeta->chain_start = w;
+ wmeta->_chain_start = w;
}
- wmeta->chain_end = w;
+ wmeta->_chain_end = w;
return update_wins(wmeta, w);
}
{
destroy_win(w);
- if (wmeta->chain_start != w)
+ if (wmeta->_chain_start != w)
{
- w->prev->next = w->next;
+ w->_prev->_next = w->_next;
}
else
{
- wmeta->chain_start = w->next;
+ wmeta->_chain_start = w->_next;
}
char pad_refitted = 0;
- if (wmeta->chain_end != w)
+ if (wmeta->_chain_end != w)
{
- w->next->prev = w->prev;
+ w->_next->_prev = w->_prev;
if (wmeta->active == w)
{
- wmeta->active = w->next;
+ wmeta->active = w->_next;
}
- if (0 != update_wins(wmeta, w->next)) /* Positioning of successor */
- { /* windows may be affected / */
- return 1; /* need correction. */
- } /* Note that update_wins() */
- pad_refitted = 1; /* already refits the pad, */
- } /* voiding later need for that. */
+ uint8_t test = update_wins(wmeta, w->_next);/* Positioning of */
+ if (0 != test) /* successor windows may */
+ { /* be affected / need */
+ return test; /* correction. Note that */
+ } /* update_wins() already */
+ pad_refitted = 1; /* refits the pad, voiding*/
+ } /* later need for that. */
else
{
- wmeta->chain_end = w->prev;
+ wmeta->_chain_end = w->_prev;
if (wmeta->active == w)
{
- wmeta->active = w->prev;
+ wmeta->active = w->_prev;
}
}
- w->prev = 0;
- w->next = 0;
+ w->_prev = 0;
+ w->_next = 0;
if (0 == pad_refitted)
{
&& size.y < wmeta->padframe.size.y)
{
wmeta->active->frame.size = size;
- return update_wins(wmeta, wmeta->chain_start); /* Succeeding windows' */
- } /* positioning may be */
- return 0; /* affected. */
-} /* TODO: Why start at */
- /* chain_start then? */
+ return update_wins(wmeta, wmeta->active); /* Positioning of following */
+ } /* windows may be affected. */
+ return 0;
+}
+
extern void cycle_active_win(struct WinMeta * wmeta, char dir)
{
if (0 != wmeta->active)
{
- if ('n' == dir)
+ if ('f' == dir)
{
- if (wmeta->active->next != 0)
+ if (wmeta->active->_next != 0)
{
- wmeta->active = wmeta->active->next;
+ wmeta->active = wmeta->active->_next;
}
else
{
- wmeta->active = wmeta->chain_start;
+ wmeta->active = wmeta->_chain_start;
}
}
else
{
- if (wmeta->active->prev != 0)
+ if (wmeta->active->_prev != 0)
{
- wmeta->active = wmeta->active->prev;
+ wmeta->active = wmeta->active->_prev;
}
else
{
- wmeta->active = wmeta->chain_end;
+ wmeta->active = wmeta->_chain_end;
}
}
}
-extern void shift_active_win(struct WinMeta * wmeta, char dir)
+extern uint8_t shift_active_win(struct WinMeta * wmeta, char dir)
{
- if ( 0 == wmeta->active /* No shifting with less */
- || wmeta->chain_start == wmeta->chain_end /* than two windows visible */
- || (dir != 'f' && dir != 'b')) /* or wrong direction char. */
+ if ( 0 == wmeta->active /* No shifting with < 2 */
+ || wmeta->_chain_start == wmeta->_chain_end) /* windows visible. */
{
- return;
+ return 0;
}
if ('f' == dir)
{
{
shift_win_backward(wmeta);
}
- update_wins(wmeta, wmeta->chain_start);
+ return update_wins(wmeta, wmeta->_chain_start);
}
{
/* Empty everything before filling it a-new. */
erase();
- wnoutrefresh(wmeta->screen);
+ wnoutrefresh(wmeta->_screen);
werase(wmeta->padframe.curses_win);
- if (wmeta->chain_start)
+ if (wmeta->_chain_start)
{
/* Draw windows' contents first, then their borders. */
- draw_wins(wmeta->chain_start);
- draw_wins_borderlines(wmeta->chain_start, wmeta->active,
+ draw_wins(wmeta->_chain_start);
+ draw_wins_borderlines(wmeta->_chain_start, wmeta->active,
wmeta->padframe.curses_win);
- draw_wins_bordercorners(wmeta->chain_start, wmeta->padframe.curses_win);
+ draw_wins_bordercorners(wmeta->_chain_start,wmeta->padframe.curses_win);
/* Draw virtual screen scroll hints. */
if (wmeta->pad_offset > 0)