X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=windows.c;h=5ab83719d30d5d99e5cde59b97bf4333bb1353a1;hb=676d45b3139bcaab1a032addc24645d8055cb2ca;hp=6a649a325b187894c8ddc46b6eb34b51f680f68f;hpb=e1ae0a05e12a8a0aec170d9d3b795ca0dc74e6ed;p=plomrogue

diff --git a/windows.c b/windows.c
index 6a649a3..5ab8371 100644
--- a/windows.c
+++ b/windows.c
@@ -1,9 +1,29 @@
 #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.screen = screen;
@@ -16,14 +36,7 @@ struct WinMeta init_win_meta (WINDOW * screen) {
   win_meta.active = 0;
   return win_meta; }
 
-void scroll_pad (struct WinMeta * win_meta, char dir) {
-// Scroll pad left (if possible) or right.
-  if      ('+' == dir)
-    win_meta->pad_offset++;
-  else if ('-' == dir && win_meta->pad_offset > 0)
-    win_meta->pad_offset--; }
-
-struct Win init_window (struct WinMeta * win_meta, char * title, void * data, void * func) {
+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;
@@ -36,7 +49,7 @@ struct Win init_window (struct WinMeta * win_meta, char * title, void * data, vo
   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;
@@ -47,26 +60,41 @@ void append_window (struct WinMeta * win_meta, struct Win * win) {
   win_meta->chain_end = win;
   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.
     win->prev->next = win->next;
   else
     win_meta->chain_start = win->next;
+  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); }
+    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.
       win_meta->active = win->prev; }
   win->prev = 0;
-  win->next = 0; }
+  win->next = 0;
+  if (0 == pad_refitted)                                                            // Refit pad if necessary.
+    refit_pad(win_meta); }
 
-struct yx 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.
   struct yx start;
   start.x = 0;                                     // if window is first in chain, place it on top-left corner
@@ -76,14 +104,14 @@ struct yx place_window (struct WinMeta * win_meta, struct Win * win) {
     while (getbegy(win_top->curses) != 1)
       win_top = win_top->prev;                                   // else, default to placing window in new top
     start.x = getbegx(win_top->curses) + win_top->width + 1;     // column to the right of the last one
-    int winprev_maxy = getbegy(win->prev->curses) + getmaxy(win->prev->curses);
+    uint16_t winprev_maxy = getbegy(win->prev->curses) + getmaxy(win->prev->curses);
     if (win->width <= win->prev->width && win->height < win_meta->height - winprev_maxy) {
       start.x = getbegx(win->prev->curses);                // place window below previous window if it fits
       start.y = winprev_maxy + 1; }                        // vertically and is not wider than its predecessor
     else {
       struct Win * win_up = win->prev;
       struct Win * win_upup = win_up;
-      int widthdiff;
+      uint16_t widthdiff;
       while (win_up != win_top) {
         win_upup = win_up->prev;
         while (1) {
@@ -99,33 +127,25 @@ struct yx place_window (struct WinMeta * win_meta, struct Win * win) {
         win_up = win_upup; } } }
   return start; }
 
-void update_windows (struct WinMeta * win_meta, struct Win * win) {
+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);
   struct yx startyx = place_window(win_meta, win);
-  int lastwincol = 0;
-  struct Win * win_p = win_meta->chain_start;
-  while (win_p != 0) {
-    if (win_p != win && getbegx(win_p->curses) + win_p->width > lastwincol + 1)
-      lastwincol = getbegx(win_p->curses) + win_p->width - 1;
-    else if (win_p == win && startyx.x + win->width > lastwincol + 1)
-      lastwincol = startyx.x + win->width - 1;
-    win_p = win_p->next; }
-  if (getmaxx(win_meta->pad) != lastwincol) {
-    wresize(win_meta->pad, getmaxy(win_meta->pad), lastwincol + 2); }
+  win->startx = startyx.x;
+  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) {
+static void destroy_window (struct Win * win) {
 // Delete window.
   delwin(win->curses);
   win->curses = 0; }
 
-void draw_window_borders (struct Win * win, char active) {
+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.
-  int y, x;
+  uint16_t y, x;
   for (y = getbegy(win->curses); y <= getbegy(win->curses) + win->height; y++) {
     mvwaddch(wgetparent(win->curses), y, getbegx(win->curses) - 1, '|');
     mvwaddch(wgetparent(win->curses), y, getbegx(win->curses) + win->width, '|'); }
@@ -134,10 +154,10 @@ void draw_window_borders (struct Win * win, char active) {
     mvwaddch(wgetparent(win->curses), getbegy(win->curses) + 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) {
-    int title_offset = 0;
+    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
-    int length_visible = strnlen(win->title, win->width - 2);
+    uint16_t length_visible = strnlen(win->title, win->width - 2);
     char title[length_visible + 3];
     char decoration = ' ';
     if (1 == active)
@@ -147,12 +167,12 @@ void draw_window_borders (struct Win * win, char active) {
     title[length_visible + 2] = '\0';
     mvwaddstr (wgetparent(win->curses), getbegy(win->curses)-1, getbegx(win->curses)+title_offset, title); } }
 
-void draw_windows_borders (struct Win * win, struct Win * win_active, struct Corners * corners, int ccount) {
+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);
+  draw_window_borders(win, active);
   corners[ccount].tl.y = getbegy(win->curses) - 1;
   corners[ccount].tl.x = getbegx(win->curses) - 1;
   corners[ccount].tr.y = getbegy(win->curses) - 1;
@@ -164,19 +184,35 @@ void draw_windows_borders (struct Win * win, struct Win * win_active, struct Cor
   if (0 != win->next) {
     draw_windows_borders (win->next, win_active, corners, ccount + 1); } }
 
-void draw_windows (struct Win * win) {
+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); } }
 
-void draw_all_windows (struct WinMeta * win_meta) {
-// Draw all windows and their borders.
+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) {
-    int n_wins = 1;
+    uint16_t n_wins = 1;
     struct Win * win_p = win_meta->chain_start;
     while (0 != win_p->next) {
       win_p = win_p->next;
@@ -184,24 +220,31 @@ void draw_all_windows (struct WinMeta * win_meta) {
     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);
-    int i;
+    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, '+'); }
-    pnoutrefresh(win_meta->pad, 0, win_meta->pad_offset, 0, 0, win_meta->height, win_meta->width - 1);
-    free(all_corners); }
+    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(); }
 
-void resize_active_window (struct WinMeta * win_meta, int height, int width) {
+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 (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); } }
 
-void cycle_active_window (struct WinMeta * win_meta, char dir) {
+extern void cycle_active_window (struct WinMeta * win_meta, char dir) {
 // Cycle active window selection forwards (dir = 'n') or backwards.
   if (0 != win_meta->active) {
     if ('n' == dir) {
@@ -215,15 +258,15 @@ void cycle_active_window (struct WinMeta * win_meta, char dir) {
       else
         win_meta->active = win_meta->chain_end; } } }
 
-void shift_active_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 (0 != win_meta->active && win_meta->chain_start != win_meta->chain_end && (dir == 'f' || dir == 'b')) {
-    int i, i_max;
     struct Win * win_shift = win_meta->active;
     char wrap = 0;
     if ((dir == 'f' && win_shift == win_meta->chain_end)
         || (dir == 'b' && win_shift == win_meta->chain_start))
       wrap = 1;
+    uint16_t i, i_max;
     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;
@@ -252,3 +295,8 @@ void shift_active_window (struct WinMeta * win_meta, char dir) {
           append_window(win_meta, wins[i]);
     free(wins);
     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; }