/* 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(), */
- /* werase(), pnoutrefresh(), doupdate() */
+ /* getmaxy(), delwin(), mvwaddch(), mvwaddstr(), */
+ /* newpad(), wnoutrefres(), erase(), werase(), */
+ /* pnoutrefresh(), doupdate(), getmaxyx() */
#include <stdlib.h> /* for malloc(), free() */
#include <string.h> /* for strlen(), strnlen(), memcpy() */
-#include "yx_uint16.h" /* for yx_uint16 coordinates */
+#include "yx_uint16.h" /* for struct yx_uint16 */
+#include "misc.h" /* for center_offset() */
/* 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). */
-static void destroy_win(struct Win * w);
+/* Draw scroll hint (a line saying that there are "dist" more elements of
+ * "unit" further into the direction symbolized by the "dir" char) into virtual
+ * screen pad, onto an appropriate edge of either a window or the screen; the
+ * left or right edge if "dir" is "<" or ">", or the upper or lower edge if it
+ * is "^" or "v". "start" should be either the start coordinate of a window's
+ * frame or .y=0, .x=wm->pad_offset if it describes the virtual screen pad.
+ * winscroll_hint() and padscroll_hint() are wrappers to simplify these uses.
+ */
+static void scroll_hint(struct WinMeta * wm, struct yx_uint16 fsize, char dir,
+ uint16_t dist, char * unit, struct yx_uint16 start);
+static void winscroll_hint(struct WinMeta * wm, struct Win * w, char dir,
+ uint16_t dist);
+static void padscroll_hint(struct WinMeta * wm, char dir, uint16_t dist);
/* Draw contents of all windows in window chain from window "w" onwards. */
-static void draw_wins(struct Win * w);
+static uint8_t draw_wins(struct WinMeta * wm, 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;
- while (w_p != 0)
+ uint32_t lastwcol = 0;
+ struct Win * wp = wmeta->chain_start;
+ while (wp != 0)
{
- if (w_p->start.x + w_p->frame.size.x > lastwincol + 1)
+ if ((uint32_t) wp->start.x + (uint32_t) wp->framesize.x > lastwcol + 1)
{
- lastwincol = w_p->start.x + w_p->frame.size.x - 1;
+ lastwcol = (uint32_t) wp->start.x + (uint32_t) wp->framesize.x - 1;
}
- w_p = w_p->next;
+ wp = wp->next;
}
/* Only resize the pad if the rightmost window column has changed. */
- if (getmaxx(wmeta->padframe.curses_win) != lastwincol)
+ if (getmaxx(wmeta->pad) + 1 != lastwcol)
{
- return (ERR == wresize(wmeta->padframe.curses_win,
- getmaxy(wmeta->padframe.curses_win),
- lastwincol + 2));
+ if (lastwcol + 2 > UINT16_MAX)
+ {
+ return 2;
+ }
+ return (ERR == wresize(wmeta->pad, getmaxy(wmeta->pad), lastwcol + 2));
}
return 0;
}
static uint8_t update_wins(struct WinMeta * wmeta, struct Win * w)
{
- if (0 != w->frame.curses_win)
- {
- 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)
- {
- return 1;
- }
- w->frame.curses_win = test;
if (0 != w->next)
{
return update_wins(wmeta, w->next);
{
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->framesize.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
- && w->frame.size.y < wmeta->padframe.size.y - w_prev_maxy)
+ uint16_t w_prev_maxy = w->prev->start.y + w->prev->framesize.y;
+ if ( w->framesize.x <= w->prev->framesize.x
+ && w->framesize.y < wmeta->padsize.y - w_prev_maxy)
{
w->start.x = w->prev->start.x;
w->start.y = w_prev_maxy + 1;
}
w_upup = w_upup->prev;
}
- 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);
- if ( w->frame.size.y < wmeta->padframe.size.y - w_prev_maxy
- && w->frame.size.x < widthdiff)
+ w_prev_maxy = w_upup->start.y + w_upup->framesize.y;
+ widthdiff = (w_upup->start.x + w_upup->framesize.x)
+ - (w_up->start.x + w_up->framesize.x);
+ if ( w->framesize.y < wmeta->padsize.y - w_prev_maxy
+ && w->framesize.x < widthdiff)
{
- w->start.x = w_up->start.x + w_up->frame.size.x + 1 ;
+ w->start.x = w_up->start.x + w_up->framesize.x + 1 ;
w->start.y = w_prev_maxy + 1;
break;
}
-static void destroy_win(struct Win * w)
+static void scroll_hint(struct WinMeta * wm, struct yx_uint16 fsize, char dir,
+ uint16_t dist, char * unit, struct yx_uint16 start)
+{
+ /* Decide on alignment (vertical/horizontal?), thereby hint text space. */
+ char * more = "more";
+ uint16_t dsc_space = fsize.x;
+ if ('<' == dir || '>' == dir)
+ {
+ dsc_space = fsize.y;
+ } /* vv-- 10 = max strlen for uint16_t */
+ char scrolldsc[1 + strlen(more) + 1 + 10 + 1 + strlen(unit) + 1 + 1];
+ sprintf(scrolldsc, " %d %s %s ", dist, more, unit);
+
+ /* Decide on offset of the description text inside the scroll hint line. */
+ uint16_t dsc_offset = 1;
+ if (dsc_space > strlen(scrolldsc) + 1)
+ {
+ dsc_offset = (dsc_space - strlen(scrolldsc)) / 2;
+ }
+
+ /* Draw scroll hint line as dir symbols bracketing description text. */
+ uint16_t draw_offset = 0;
+ if ('>' == dir)
+ {
+ draw_offset = fsize.x - 1;
+ }
+ else if ('v' == dir)
+ {
+ draw_offset = fsize.y - 1;
+ }
+ uint16_t q = 0;
+ for (; q < dsc_space; q++)
+ {
+ chtype symbol = dir | A_REVERSE;
+ if (q >= dsc_offset && q < strlen(scrolldsc) + dsc_offset)
+ {
+ symbol = scrolldsc[q - dsc_offset] | A_REVERSE;
+ }
+ if ('<' == dir || '>' == dir)
+ {
+ mvwaddch(wm->pad, start.y + q, start.x + draw_offset, symbol);
+ }
+ else
+ {
+ mvwaddch(wm->pad, start.y + draw_offset, start.x + q, symbol);
+ }
+ }
+}
+
+
+static void padscroll_hint(struct WinMeta * wm, char dir, uint16_t dist)
+{
+ struct yx_uint16 start;
+ start.y = 0;
+ start.x = wm->pad_offset;
+ scroll_hint(wm, wm->padsize, dir, dist, "columns", start);
+}
+
+
+
+static void winscroll_hint(struct WinMeta * wm, struct Win * w, char dir,
+ uint16_t dist)
{
- delwin(w->frame.curses_win);
- w->frame.curses_win = 0;
+ char * unit = "lines";
+ if ('<' == dir || '>' == dir)
+ {
+ unit = "columns";
+ }
+ struct yx_uint16 start = w->start;
+ scroll_hint(wm, w->framesize, dir, dist, unit, start);
}
-static void draw_wins(struct Win * w)
+static uint8_t draw_wins(struct WinMeta * wm, struct Win * w)
{
w->draw(w);
+ uint16_t y, x, size_y, size_x;
+ size_y = w->winmapsize.y;
+ size_x = w->winmapsize.x;
+ uint16_t offset_y = center_offset(w->center.y, size_y, w->framesize.y);
+ uint16_t offset_x = center_offset(w->center.x, size_x, w->framesize.x);
+ for (y = offset_y; y < w->framesize.y + offset_y && y < size_y; y++)
+ {
+ for (x = offset_x; x < w->framesize.x + offset_x && x < size_x; x++)
+ {
+ chtype ch = w->winmap[(y * w->winmapsize.x) + x];
+ mvwaddch(wm->pad, w->start.y + (y - offset_y),
+ w->start.x + (x - offset_x), ch);
+ }
+ }
+ free(w->winmap);
+ w->winmap = NULL;
+ w->winmapsize.y = 0;
+ w->winmapsize.x = 0;
+ if (offset_y > 0)
+ {
+ winscroll_hint(wm, w, '^', offset_y + 1);
+ }
+ if (size_y > offset_y + w->framesize.y)
+ {
+ winscroll_hint(wm, w, 'v', size_y - ((offset_y + w->framesize.y) - 1));
+ }
+ if (offset_x > 0)
+ {
+ winscroll_hint(wm, w, '<', offset_x + 1);
+ }
+ if (size_x > offset_x + w->framesize.x)
+ {
+ winscroll_hint(wm, w, '>', size_x - ((offset_x + w->framesize.x) - 1));
+ }
if (0 != w->next)
{
- draw_wins(w->next);
+ return draw_wins(wm, w->next);
}
+ return 0;
}
{
/* 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->framesize.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->framesize.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->framesize.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->framesize.y, x, '-');
}
/* Draw as much as possible of the title into center of top border line. */
char min_title_length_visible = 3; /* min. 1 char + 2 padding/decoration */
- if (w->frame.size.x >= min_title_length_visible)
+ if (w->framesize.x >= min_title_length_visible)
{
uint16_t title_offset = 0;
- if (w->frame.size.x > strlen(w->title) + 2)
+ if (w->framesize.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->framesize.x - (strlen(w->title) + 2)) / 2;
+ } /* +2 is for padding/decoration */
+ uint16_t length_visible = strnlen(w->title, w->framesize.x - 2);
char title[length_visible + 3];
char decoration = ' ';
if (1 == active)
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 + w->frame.size.y, w->start.x + w->frame.size.x, '+');
+ mvwaddch(pad, w->start.y - 1, w->start.x + w->framesize.x, '+');
+ mvwaddch(pad, w->start.y + w->framesize.y, w->start.x - 1, '+');
+ mvwaddch(pad, w->start.y + w->framesize.y, w->start.x + w->framesize.x,'+');
if (0 != w->next)
{
draw_wins_bordercorners(w->next, pad);
-extern uint8_t init_win_meta(WINDOW * screen, struct WinMeta * wmeta)
+extern uint8_t init_win_meta(WINDOW * screen, struct WinMeta ** wmp)
{
+ struct WinMeta * wmeta = malloc(sizeof(struct WinMeta));
wmeta->screen = screen;
- wmeta->padframe.size.y = getmaxy(screen);
- wmeta->padframe.size.x = getmaxx(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->padsize.y = maxy_test;
+ wmeta->padsize.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->padsize.y, 1);
+ if (NULL == pad_test)
{
return 1;
}
- wmeta->padframe.curses_win = test;
+ wmeta->pad = pad_test;
wmeta->active = 0;
+ *wmp = wmeta;
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 * 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;
}
- else
+ w->prev = 0;
+ w->next = 0;
+ w->winmapsize.y = 0;
+ w->winmapsize.x = 0;
+ w->winmap = NULL;
+ w->title = malloc(strlen(title) + 1);
+ if (NULL == w->title)
+ {
+ return 1;
+ }
+ sprintf(w->title, "%s", title);
+ w->draw = func;
+ w->center.y = 0;
+ w->center.x = 0;
+ if (0 < width)
{
- w.frame.size.x = 1;
+ w->framesize.x = width;
}
- if (height > 0 && height <= wmeta->padframe.size.y - 1)
+ else if (0 >= width)
{
- w.frame.size.y = height;
+ w->framesize.x = wmeta->padsize.x + width;
}
- else
+ if (0 < height && height <= wmeta->padsize.y - 1)
{
- w.frame.size.y = wmeta->padframe.size.y - 1;
+ w->framesize.y = height;
}
- return w;
+ else if (0 >= height && wmeta->padsize.y + (height - 1) > 0)
+ {
+ w->framesize.y = wmeta->padsize.y + (height - 1);
+ }
+ *wp = w;
+ return 0;
+}
+
+
+
+extern void free_winmeta(struct WinMeta * wmeta)
+{
+ delwin(wmeta->pad);
+ free(wmeta);
+}
+
+
+
+extern void free_win(struct Win * win)
+{
+ free(win->title);
+ free(win);
}
extern uint8_t suspend_win(struct WinMeta * wmeta, struct Win * w)
{
- destroy_win(w);
-
if (wmeta->chain_start != w)
{
w->prev->next = 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;
{
if (new_offset >= 0
&& (new_offset < wmeta->pad_offset
- || new_offset + wmeta->padframe.size.x
- < getmaxx(wmeta->padframe.curses_win)))
+ || new_offset + wmeta->padsize.x < getmaxx(wmeta->pad)))
{
wmeta->pad_offset = new_offset;
}
extern uint8_t resize_active_win(struct WinMeta * wmeta, struct yx_uint16 size)
{
if (0 != wmeta->active
- && size.x > 0 && size.y > 0
- && size.y < wmeta->padframe.size.y)
+ && size.x > 0 && size.y > 0 && size.y < wmeta->padsize.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? */
+ wmeta->active->framesize = size;
+ 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)
{
-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);
}
-extern void draw_all_wins(struct WinMeta * wmeta)
+extern uint8_t draw_all_wins(struct WinMeta * wm)
{
/* Empty everything before filling it a-new. */
erase();
- wnoutrefresh(wmeta->screen);
- werase(wmeta->padframe.curses_win);
- if (wmeta->chain_start)
+ wnoutrefresh(wm->screen);
+ werase(wm->pad);
+ if (wm->chain_start)
{
- /* Draw windows' contents first, then their borders. */
- 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 windows' borders first, then windows. */
+ draw_wins_borderlines(wm->chain_start, wm->active, wm->pad);
+ draw_wins_bordercorners(wm->chain_start, wm->pad);
+ if (1 == draw_wins(wm, wm->chain_start))
+ {
+ return 1;
+ }
/* Draw virtual screen scroll hints. */
- if (wmeta->pad_offset > 0)
+ if (wm->pad_offset > 0)
{
- draw_scroll_hint(&wmeta->padframe,
- wmeta->pad_offset, wmeta->pad_offset + 1, '<');
+ padscroll_hint(wm, '<', wm->pad_offset + 1);
}
- if (wmeta->pad_offset + wmeta->padframe.size.x
- < getmaxx(wmeta->padframe.curses_win) - 1)
+ uint16_t size_x = getmaxx(wm->pad);
+ uint16_t right_edge = wm->pad_offset + wm->padsize.x;
+ if (right_edge < size_x - 1)
{
- draw_scroll_hint(&wmeta->padframe,
- wmeta->pad_offset + wmeta->padframe.size.x - 1,
- getmaxx(wmeta->padframe.curses_win)
- - (wmeta->pad_offset + wmeta->padframe.size.x),
- '>');
+ padscroll_hint(wm, '>', size_x - right_edge);
}
- /* Write virtual screen segment to be shown on physical screen into */
- /* ncurses screen buffer. */
- pnoutrefresh(wmeta->padframe.curses_win, 0, wmeta->pad_offset, 0, 0,
- wmeta->padframe.size.y, wmeta->padframe.size.x-1);
+ /* Write pad segment to be shown on physical screen to screen buffer. */
+ pnoutrefresh(wm->pad, 0, wm->pad_offset, 0, 0,
+ wm->padsize.y, wm->padsize.x - 1);
}
/* Only at the end write accumulated changes to the physical screen. */
doupdate();
-}
-
-
-
-extern uint8_t draw_scroll_hint(struct Frame * frame, uint16_t pos,
- uint32_t dist, char dir)
-{
- /* Decide on alignment (vertical/horizontal?), thereby scroll hint text. */
- char * more = "more";
- char * unit_cols = "columns";
- char * unit_rows = "lines";
- uint16_t dsc_space = frame->size.x;
- char * unit = unit_rows;
- if ('<' == dir || '>' == dir)
- {
- dsc_space = frame->size.y;
- unit = unit_cols;
- }
- char * scrolldsc = malloc((4 * sizeof(char)) + strlen(more) + strlen(unit)
- + 10); /* 10 = uint32 max strlen */
- if (NULL == scrolldsc)
- {
- return 1;
- }
- sprintf(scrolldsc, " %d %s %s ", dist, more, unit);
-
- /* Decide on offset of the description text inside the scroll hint line. */
- char offset = 1, q;
- if (dsc_space > strlen(scrolldsc) + 1)
- {
- offset = (dsc_space - strlen(scrolldsc)) / 2;
- }
-
- /* Draw scroll hint line as dir symbols bracketing description text. */
- chtype symbol;
- for (q = 0; q < dsc_space; q++)
- {
- if (q >= offset && q < strlen(scrolldsc) + offset)
- {
- symbol = scrolldsc[q - offset] | A_REVERSE;
- }
- else
- {
- symbol = dir | A_REVERSE;
- }
- if ('<' == dir || '>' == dir)
- {
- mvwaddch(frame->curses_win, q, pos, symbol);
- }
- else
- {
- mvwaddch(frame->curses_win, pos, q, symbol);
- }
- }
-
- free(scrolldsc);
return 0;
}
projects / plomrogue / blobdiff