+++ /dev/null
-/* windows.c */
-
-#include "windows.h"
-#include <stdint.h> /* for uint8_t, uint16_t, uint32_t, UINT16_MAX */
-#include <ncurses.h> /* for typedefs chtype, wresize(), getmaxx(), getmaxy(),
- * delwin(), mvwaddch(), mvwaddstr(), newpad(), erase(),
- * wnoutrefresh(), werase(), pnoutrefresh(), doupdate()
- */
-#include <stdlib.h> /* for free() */
-#include <string.h> /* for strlen(), strnlen(), memcpy() */
-#include "yx_uint16.h" /* for struct yx_uint16 */
-#include "misc.h" /* for center_offset(), try_malloc() */
-#include "main.h" /* for world global */
-#include "rexit.h" /* for exit_err() */
-
-
-
-/* Make virtual screen just wide enough to contain all visible windows. */
-static void refit_pad();
-
-/* Update geometry (sizes, positions) of window "w" and its successors in the
- * window chain. Use place_win() for the positioning algorithm.
- */
-static void update_wins(struct Win * w);
-static void place_win(struct Win * w);
-
-/* Draw scroll hint (a line saying that there are "dist" more elements of "unit"
- * further into the direction symbolized by "dir") into virtual screen, onto an
- * appropriate edge of a window or the screen; the left/right edge if "dir" is
- * "<"/">", or the top/bottom edge if it is "^"/"v". "start" be either the start
- * coordinate of a window's frame, or .y=0, .x=wm->pad_offset for the virtual
- * screen. winscroll_hint() and padscroll_hint() are wrappers to both cases.
- */
-static void scroll_hint(struct yx_uint16 fsize, char dir, uint16_t dist,
- char * unit, struct yx_uint16 start);
-static void winscroll_hint(struct Win * w, char dir, uint16_t dist);
-static void padscroll_hint(char dir, uint16_t dist);
-
-/* Draw contents of all windows in window chain from window "w" onwards. */
-static void draw_wins(struct Win * w);
-
-/* draw_win_borderlines() draws vertical/horizontal borders of window "w" sans
- * corners into the virtual screen. It draws the top border line as the windows'
- * title bar (highlighted if the window is selected as active). It is called
- * recursively by draw_wins_borderlines() on all windows from "w" on.
- * draw_wins_bordercorners() draws the border corners of "w" and its successors.
- */
-static void draw_win_borderlines(struct Win * w);
-static void draw_wins_borderlines(struct Win * w);
-static void draw_wins_bordercorners(struct Win * w);
-
-/* Shift active window forwards / backwards in window chain. */
-static void shift_win_forward();
-static void shift_win_backward();
-
-
-
-static void refit_pad()
-{
- /* Determine rightmost window column. */
- uint32_t lastwcol = 0;
- struct Win * wp = world.wmeta->chain_start;
- while (wp != 0)
- {
- if ((uint32_t) wp->start.x + (uint32_t) wp->framesize.x > lastwcol + 1)
- {
- lastwcol = (uint32_t) wp->start.x + (uint32_t) wp->framesize.x - 1;
- }
- wp = wp->next;
- }
-
- /* Only resize the pad if the rightmost window column has changed. */
- char * err_s = "refit_pad() extends virtual screen beyond legal sizes.";
- char * err_m = "refit_pad() triggers memory alloc error via wresize().";
- if (getmaxx(world.wmeta->pad) + 1 != lastwcol)
- {
- uint8_t t = (lastwcol + 2 > UINT16_MAX);
- exit_err(t, err_s);
- t = wresize(world.wmeta->pad, getmaxy(world.wmeta->pad), lastwcol + 2);
- exit_err(t, err_m);
- }
-}
-
-
-
-static void update_wins(struct Win * w)
-{
- place_win(w);
- refit_pad();
- if (0 != w->next)
- {
- update_wins(w->next);
- }
-}
-
-
-
-static void place_win(struct Win * w)
-{
- /* If w is first window, it goes into the top left corner. */
- w->start.x = 0;
- w->start.y = 1; /* Leave space for title bar. */
- if (0 != w->prev)
- {
-
- /* If not, fit w's top left to top right of last top predecessor. */
- struct Win * w_top = w->prev;
- while (w_top->start.y != 1)
- {
- w_top = w_top->prev;
- }
- w->start.x = w_top->start.x + w_top->framesize.x + 1;
-
- /* Fit w's top left to bottom left of its ->prev if enough space. */
- uint16_t w_prev_maxy = w->prev->start.y + w->prev->framesize.y;
- if ( w->framesize.x <= w->prev->framesize.x
- && w->framesize.y < world.wmeta->padsize.y - w_prev_maxy)
- {
- w->start.x = w->prev->start.x;
- w->start.y = w_prev_maxy + 1;
- }
-
- /* Failing that, try to fit w' top left to the top right of the last
- * predecessor w_test 1) not followed by windows with a left corner
- * further rightwards than its own 2) with enough space rightwards for w
- * until the bottom right of w_thr directly throning over it 3) and with
- * this same space extending far enough to the bottom for fitting in w.
- */
- else
- {
- struct Win * w_test = w->prev;
- struct Win * w_thr;
- while (w_test != w_top)
- {
- w_thr = w_test->prev;
- for (; w_test->start.y <= w_thr->start.y; w_thr = w_thr->prev);
- uint16_t w_thr_bottom = w_thr->start.y + w_thr->framesize.y;
- uint16_t free_width = (w_thr->start.x + w_thr->framesize.x)
- - (w_test->start.x + w_test->framesize.x);
- if ( w->framesize.y < world.wmeta->padsize.y - w_thr_bottom
- && w->framesize.x < free_width)
- {
- w->start.x = w_test->start.x + w_test->framesize.x + 1;
- w->start.y = w_thr_bottom + 1;
- break;
- }
- w_test = w_thr;
- }
- }
- }
-}
-
-
-
-static void scroll_hint(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 c = dir | A_REVERSE;
- if (q >= dsc_offset && q < strlen(scrolldsc) + dsc_offset)
- {
- c = scrolldsc[q - dsc_offset] | A_REVERSE;
- }
- if ('<' == dir || '>' == dir)
- {
- mvwaddch(world.wmeta->pad, start.y + q, start.x + draw_offset, c);
- continue;
- }
- mvwaddch(world.wmeta->pad, start.y + draw_offset, start.x + q, c);
- }
-}
-
-
-static void padscroll_hint(char dir, uint16_t dist)
-{
- struct yx_uint16 start;
- start.y = 0;
- start.x = world.wmeta->pad_offset;
- scroll_hint(world.wmeta->padsize, dir, dist, "columns", start);
-}
-
-
-
-static void winscroll_hint(struct Win * w, char dir, uint16_t dist)
-{
- char * unit = "lines";
- if ('<' == dir || '>' == dir)
- {
- unit = "columns";
- }
- struct yx_uint16 start = w->start;
- scroll_hint(w->framesize, dir, dist, unit, start);
-}
-
-
-
-static void draw_wins(struct Win * w)
-{
- w->draw(w);
- uint16_t size_y = w->winmapsize.y;
- uint16_t 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);
- uint16_t y, 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(world.wmeta->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(w, '^', offset_y + 1);
- }
- if (size_y > offset_y + w->framesize.y)
- {
- winscroll_hint(w, 'v', size_y - ((offset_y + w->framesize.y) - 1));
- }
- if (offset_x > 0)
- {
- winscroll_hint(w, '<', offset_x + 1);
- }
- if (size_x > offset_x + w->framesize.x)
- {
- winscroll_hint(w, '>', size_x - ((offset_x + w->framesize.x) - 1));
- }
- if (0 != w->next)
- {
- return draw_wins(w->next);
- }
-}
-
-
-
-static void draw_win_borderlines(struct Win * w)
-{
- /* Draw vertical and horizontal border lines. */
- uint16_t y, x;
- for (y = w->start.y; y <= w->start.y + w->framesize.y; y++)
- {
- mvwaddch(world.wmeta->pad, y, w->start.x - 1, '|');
- mvwaddch(world.wmeta->pad, y, w->start.x + w->framesize.x, '|');
- }
- for (x = w->start.x; x <= w->start.x + w->framesize.x; x++)
- {
- mvwaddch(world.wmeta->pad, w->start.y - 1, x, '-');
- mvwaddch(world.wmeta->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->framesize.x >= min_title_length_visible)
- {
- uint16_t title_offset = 0;
- if (w->framesize.x > strlen(w->title) + 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 (w == world.wmeta->active)
- {
- decoration = '$';
- }
- memcpy(title + 1, w->title, length_visible);
- title[0] = title[length_visible + 1] = decoration;
- title[length_visible + 2] = '\0';
- mvwaddstr(world.wmeta->pad,
- w->start.y - 1, w->start.x + title_offset, title);
- }
-}
-
-
-
-static void draw_wins_borderlines(struct Win * w)
-{
- draw_win_borderlines(w);
- if (0 != w->next)
- {
- draw_wins_borderlines(w->next);
- }
-}
-
-
-
-static void draw_wins_bordercorners(struct Win * w)
-{
- mvwaddch(world.wmeta->pad, w->start.y - 1, w->start.x - 1, '+');
- mvwaddch(world.wmeta->pad, w->start.y - 1, w->start.x + w->framesize.x,'+');
- mvwaddch(world.wmeta->pad, w->start.y + w->framesize.y, w->start.x - 1,'+');
- mvwaddch(world.wmeta->pad, w->start.y + w->framesize.y,
- w->start.x + w->framesize.x, '+');
- if (0 != w->next)
- {
- draw_wins_bordercorners(w->next);
- }
-}
-
-
-
-static void shift_win_forward()
-{
- if (world.wmeta->active == world.wmeta->chain_end)
- {
- world.wmeta->chain_end = world.wmeta->active->prev;
- world.wmeta->chain_end->next = 0;
- world.wmeta->active->next = world.wmeta->chain_start;
- world.wmeta->active->next->prev = world.wmeta->active;
- world.wmeta->chain_start = world.wmeta->active;
- world.wmeta->chain_start->prev = 0;
- }
- else
- {
- struct Win * old_prev = world.wmeta->active->prev;
- struct Win * old_next = world.wmeta->active->next;
- if (world.wmeta->chain_end == world.wmeta->active->next)
- {
- world.wmeta->chain_end = world.wmeta->active;
- world.wmeta->active->next = 0;
- }
- else
- {
- world.wmeta->active->next = old_next->next;
- world.wmeta->active->next->prev = world.wmeta->active;
- }
- if (world.wmeta->chain_start == world.wmeta->active)
- {
- world.wmeta->chain_start = old_next;
- }
- else
- {
- old_prev->next = old_next;
- }
- old_next->prev = old_prev;
- old_next->next = world.wmeta->active;
- world.wmeta->active->prev = old_next;
- }
-}
-
-
-
-static void shift_win_backward()
-{
- if (world.wmeta->active == world.wmeta->chain_start)
- {
- world.wmeta->chain_start = world.wmeta->active->next;
- world.wmeta->chain_start->prev = 0;
- world.wmeta->active->prev = world.wmeta->chain_end;
- world.wmeta->active->prev->next = world.wmeta->active;
- world.wmeta->chain_end = world.wmeta->active;
- world.wmeta->chain_end->next = 0;
- }
- else
- {
- struct Win * old_prev = world.wmeta->active->prev;
- struct Win * old_next = world.wmeta->active->next;
- if (world.wmeta->chain_start == world.wmeta->active->prev)
- {
- world.wmeta->chain_start = world.wmeta->active;
- world.wmeta->active->prev = 0;
- }
- else
- {
- world.wmeta->active->prev = old_prev->prev;
- world.wmeta->active->prev->next = world.wmeta->active;
- }
- if (world.wmeta->chain_end == world.wmeta->active)
- {
- world.wmeta->chain_end = old_prev;
- }
- else
- {
- old_next->prev = old_prev;
- }
- old_prev->next = old_next;
- old_prev->prev = world.wmeta->active;
- world.wmeta->active->next = old_prev;
- }
-}
-
-
-
-extern void init_win_meta()
-{
- char * f_name = "init_win_meta()";
- char * err_s = "init_win_meta() creates virtual screen beyond legal size.";
- char * err_m = "init_win_meta() triggers memory alloc error via newpad().";
- world.wmeta = try_malloc(sizeof(struct WinMeta), f_name);
- world.wmeta->screen = initscr();
- uint32_t maxy_test = getmaxy(world.wmeta->screen);
- uint32_t maxx_test = getmaxx(world.wmeta->screen);
- exit_err(maxy_test > UINT16_MAX || maxx_test > UINT16_MAX, err_s);
- world.wmeta->padsize.y = maxy_test;
- world.wmeta->padsize.x = maxx_test;
- world.wmeta->chain_start = 0;
- world.wmeta->chain_end = 0;
- world.wmeta->pad_offset = 0;
- world.wmeta->pad = newpad(world.wmeta->padsize.y, 1);
- exit_err(NULL == world.wmeta->pad, err_m);
- world.wmeta->active = 0;
-}
-
-
-
-extern void init_win(struct Win ** wp, char * title, int16_t height,
- int16_t width, void * func)
-{
- char * f_name = "init_win()";
- struct Win * w = try_malloc(sizeof(struct Win), f_name);
- w->prev = 0;
- w->next = 0;
- w->winmapsize.y = 0;
- w->winmapsize.x = 0;
- w->winmap = NULL;
- w->title = try_malloc(strlen(title) + 1, f_name);
- sprintf(w->title, "%s", title);
- w->draw = func;
- w->center.y = 0;
- w->center.x = 0;
- if (0 < width)
- {
- w->framesize.x = width;
- }
- else if (0 >= width)
- {
- w->framesize.x = world.wmeta->padsize.x + width;
- }
- if (0 < height && height <= world.wmeta->padsize.y - 1)
- {
- w->framesize.y = height;
- }
- else if (0 >= height && world.wmeta->padsize.y + (height - 1) > 0)
- {
- w->framesize.y = world.wmeta->padsize.y + (height - 1);
- }
- *wp = w;
-}
-
-
-
-extern void free_winmeta_and_endwin()
-{
- delwin(world.wmeta->pad);
- free(world.wmeta);
- endwin();
-}
-
-
-
-extern void free_win(struct Win * win)
-{
- free(win->title);
- free(win);
-}
-
-
-
-extern void append_win(struct Win * w)
-{
- if (0 != world.wmeta->chain_start)
- {
- w->prev = world.wmeta->chain_end;
- world.wmeta->chain_end->next = w;
- }
- else
- {
- world.wmeta->active = w;
- world.wmeta->chain_start = w;
- }
- world.wmeta->chain_end = w;
- update_wins(w);
-}
-
-
-
-extern void suspend_win(struct Win * w)
-{
- if (world.wmeta->chain_start != w)
- {
- w->prev->next = w->next;
- }
- else
- {
- world.wmeta->chain_start = w->next;
- }
- uint8_t pad_refitted = 0;
- if (world.wmeta->chain_end != w)
- {
- w->next->prev = w->prev;
- if (world.wmeta->active == w)
- {
- world.wmeta->active = w->next;
- }
- update_wins(w->next); /* Positioning of successor windows may be */
- pad_refitted = 1; /* affected / need correction. Note that */
- } /* update_wins() already refits the pad, */
- else /* voiding later need for that. */
- {
- world.wmeta->chain_end = w->prev;
- if (world.wmeta->active == w)
- {
- world.wmeta->active = w->prev;
- }
- }
- w->prev = 0;
- w->next = 0;
- if (0 == pad_refitted)
- {
- refit_pad();
- }
-}
-
-
-
-extern void reset_pad_offset(uint16_t new_offset)
-{
- if (new_offset >= 0
- && (new_offset < world.wmeta->pad_offset
- || new_offset + world.wmeta->padsize.x < getmaxx(world.wmeta->pad)))
- {
- world.wmeta->pad_offset = new_offset;
- }
-}
-
-
-
-extern void resize_active_win(struct yx_uint16 size)
-{
- if (0 != world.wmeta->active
- && size.x > 0 && size.y > 0 && size.y < world.wmeta->padsize.y)
- {
- world.wmeta->active->framesize = size;
- update_wins(world.wmeta->active); /* Positioning of following */
- } /* windows may be affected. */
-}
-
-
-
-extern void cycle_active_win(char dir)
-{
- if (0 != world.wmeta->active)
- {
- if ('f' == dir)
- {
- if (world.wmeta->active->next != 0)
- {
- world.wmeta->active = world.wmeta->active->next;
- }
- else
- {
- world.wmeta->active = world.wmeta->chain_start;
- }
- }
- else
- {
- if (world.wmeta->active->prev != 0)
- {
- world.wmeta->active = world.wmeta->active->prev;
- }
- else
- {
- world.wmeta->active = world.wmeta->chain_end;
- }
- }
- }
-}
-
-
-
-extern void shift_active_win(char dir)
-{
- if ( 0 == world.wmeta->active /* No shifting with < 2 windows visible. */
- || world.wmeta->chain_start == world.wmeta->chain_end)
- {
- return;
- }
- if ('f' == dir)
- {
- shift_win_forward();
- update_wins(world.wmeta->chain_start);
- return;
- }
- shift_win_backward();
- update_wins(world.wmeta->chain_start);
-}
-
-
-
-extern void draw_all_wins()
-{
- /* Empty everything before filling it a-new. */
- erase();
- wnoutrefresh(world.wmeta->screen);
- werase(world.wmeta->pad);
- if (world.wmeta->chain_start)
- {
-
- /* Draw windows' borders first, then windows. */
- draw_wins_borderlines(world.wmeta->chain_start);
- draw_wins_bordercorners(world.wmeta->chain_start);
- draw_wins(world.wmeta->chain_start);
-
- /* Draw virtual screen scroll hints. */
- if (world.wmeta->pad_offset > 0)
- {
- padscroll_hint('<', world.wmeta->pad_offset + 1);
- }
- uint16_t size_x = getmaxx(world.wmeta->pad);
- uint16_t right_edge = world.wmeta->pad_offset + world.wmeta->padsize.x;
- if (right_edge < size_x - 1)
- {
- padscroll_hint('>', size_x - right_edge);
- }
-
- /* Write pad segment to be shown on physical screen to screen buffer. */
- pnoutrefresh(world.wmeta->pad, 0, world.wmeta->pad_offset, 0, 0,
- world.wmeta->padsize.y, world.wmeta->padsize.x - 1);
- }
-
- /* Only at the end write accumulated changes to the physical screen. */
- doupdate();
-}
projects / plomrogue / blobdiff