window.c

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#include "config.h"
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include "mutt/lib.h"
#include "gui/lib.h"
#include "color/lib.h"
#include "muttlib.h"
#include "wdata.h"
 
static void message_bar(struct MuttWindow *win, int percent, const char *fmt, ...)
{
  if (!fmt || !win)
    return;
 
  va_list ap;
  char buf[256], buf2[256];
  int w = (percent * win->state.cols) / 100;
  size_t l;
 
  va_start(ap, fmt);
  vsnprintf(buf, sizeof(buf), fmt, ap);
  l = mutt_strwidth(buf);
  va_end(ap);
 
  mutt_simple_format(buf2, sizeof(buf2), 0, win->state.cols - 2, JUSTIFY_LEFT,
                     0, buf, sizeof(buf), false);
 
  mutt_window_move(win, 0, 0);
 
  if (simple_color_is_set(MT_COLOR_PROGRESS))
  {
    if (l < w)
    {
      /* The string fits within the colour bar */
      mutt_curses_set_normal_backed_color_by_id(MT_COLOR_PROGRESS);
      mutt_window_addstr(win, buf2);
      w -= l;
      while (w-- > 0)
      {
        mutt_window_addch(win, ' ');
      }
      mutt_curses_set_color_by_id(MT_COLOR_NORMAL);
    }
    else
    {
      /* The string is too long for the colour bar */
      int off = mutt_wstr_trunc(buf2, sizeof(buf2), w, NULL);
 
      char ch = buf2[off];
      buf2[off] = '\0';
      mutt_curses_set_normal_backed_color_by_id(MT_COLOR_PROGRESS);
      mutt_window_addstr(win, buf2);
      buf2[off] = ch;
      mutt_curses_set_color_by_id(MT_COLOR_NORMAL);
      mutt_window_addstr(win, &buf2[off]);
    }
  }
  else
  {
    mutt_window_addstr(win, buf2);
  }
 
  mutt_window_clrtoeol(win);
}
 
static int progress_window_recalc(struct MuttWindow *win)
{
  if (!win || !win->wdata)
    return -1;
 
  struct ProgressWindowData *wdata = win->wdata;
  wdata->display_pos = wdata->update_pos;
  wdata->display_time = wdata->update_time;
 
  if (wdata->is_bytes)
    mutt_str_pretty_size(wdata->pretty_pos, sizeof(wdata->pretty_pos), wdata->display_pos);
 
  if (wdata->update_percent < 0)
    wdata->display_percent = 100.0 * wdata->display_pos / wdata->size;
  else
    wdata->display_percent = wdata->update_percent;
 
  win->actions |= WA_REPAINT;
  return 0;
}
 
static int progress_window_repaint(struct MuttWindow *win)
{
  if (!win || !win->wdata)
    return -1;
 
  struct ProgressWindowData *wdata = win->wdata;
 
  if (wdata->size == 0)
  {
    /* L10N: Progress bar: `%s` loading text, `%zu` item count,
       `%d` percentage, `%%` is the percent symbol.
       `%d` and `%%` may be reordered, or space inserted, if you wish. */
    message_bar(wdata->win, wdata->display_percent, _("%s %zu (%d%%)"),
                wdata->msg, wdata->display_pos, wdata->display_percent);
  }
  else
  {
    if (wdata->is_bytes)
    {
      /* L10N: Progress bar: `%s` loading text, `%s/%s` position/size,
         `%d` is the number, `%%` is the percent symbol.
         `%d` and `%%` may be reordered, or space inserted, if you wish. */
      message_bar(wdata->win, wdata->display_percent, _("%s %s/%s (%d%%)"),
                  wdata->msg, wdata->pretty_pos, wdata->pretty_size, wdata->display_percent);
    }
    else
    {
      /* L10N: Progress bar: `%s` loading text, `%zu/%zu` position/size,
         `%d` is the number, `%%` is the percent symbol.
         `%d` and `%%` may be reordered, or space inserted, if you wish. */
      message_bar(wdata->win, wdata->display_percent, _("%s %zu/%zu (%d%%)"),
                  wdata->msg, wdata->display_pos, wdata->size, wdata->display_percent);
    }
  }
 
  return 0;
}
 
static bool percent_needs_update(const struct ProgressWindowData *wdata, int percent)
{
  return (percent > wdata->display_percent);
}
 
static bool pos_needs_update(const struct ProgressWindowData *wdata, long pos)
{
  const unsigned shift = wdata->is_bytes ? 10 : 0;
  return pos >= (wdata->display_pos + (wdata->size_inc << shift));
}
 
static bool time_needs_update(const struct ProgressWindowData *wdata, size_t now)
{
  if (wdata->time_inc == 0)
    return true;
 
  if (now < wdata->display_time)
    return true;
 
  const size_t elapsed = (now - wdata->display_time);
  return (wdata->time_inc < elapsed);
}
 
bool progress_window_update(struct MuttWindow *win, size_t pos, int percent)
{
  if (!win || !win->wdata)
    return false;
 
  struct ProgressWindowData *wdata = win->wdata;
 
  if (wdata->size == 0)
  {
    if (!percent_needs_update(wdata, percent))
      return false;
  }
  else
  {
    if (!pos_needs_update(wdata, pos))
      return false;
  }
 
  const uint64_t now = mutt_date_now_ms();
  if (!time_needs_update(wdata, now))
    return false;
 
  wdata->update_pos = pos;
  wdata->update_percent = percent;
  wdata->update_time = now;
  win->actions |= WA_RECALC;
  return true;
}
 
struct MuttWindow *progress_window_new(const char *msg, size_t size, size_t size_inc,
                                       size_t time_inc, bool is_bytes)
{
  if (size_inc == 0) // The user has disabled the progress bar
    return NULL;
 
  struct MuttWindow *win = mutt_window_new(WT_STATUS_BAR, MUTT_WIN_ORIENT_VERTICAL,
                                           MUTT_WIN_SIZE_FIXED,
                                           MUTT_WIN_SIZE_UNLIMITED, 1);
  win->recalc = progress_window_recalc;
  win->repaint = progress_window_repaint;
  win->actions |= WA_RECALC;
 
  struct ProgressWindowData *wdata = progress_wdata_new();
  wdata->win = win;
  wdata->size = size;
  wdata->size_inc = size_inc;
  wdata->time_inc = time_inc;
  wdata->is_bytes = is_bytes;
  mutt_str_copy(wdata->msg, msg, sizeof(wdata->msg));
 
  if (is_bytes)
    mutt_str_pretty_size(wdata->pretty_size, sizeof(wdata->pretty_size), size);
 
  win->wdata = wdata;
  win->wdata_free = progress_wdata_free;
 
  return win;
}