pbar.c

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#include "config.h"
#include <stdio.h>
#include <sys/stat.h>
#include "mutt/lib.h"
#include "config/lib.h"
#include "core/lib.h"
#include "gui/lib.h"
#include "pbar.h"
#include "lib.h"
#include "color/lib.h"
#include "expando/lib.h"
#include "index/lib.h"
#include "display.h"
#include "private_data.h"

struct PBarPrivateData
{
  struct IndexSharedData *shared; 
  struct PagerPrivateData *priv;  
  char *pager_format;             
};

static int pbar_recalc(struct MuttWindow *win)
{
  struct PBarPrivateData *pbar_data = win->wdata;
  struct IndexSharedData *shared = pbar_data->shared;
  struct PagerPrivateData *priv = pbar_data->priv;
  if (!priv || !priv->pview)
    return 0;
 
  struct Buffer *buf = buf_pool_get();
  char pager_progress_str[65] = { 0 }; /* Lots of space for translations */
 
  long offset;
  if (priv->lines && (priv->cur_line <= priv->lines_used))
    offset = priv->lines[priv->cur_line].offset;
  else
    offset = priv->bytes_read;
 
  if (offset < (priv->st.st_size - 1))
  {
    const long percent = (100 * offset) / priv->st.st_size;
    /* L10N: Pager position percentage.
       `%ld` is the number, `%%` is the percent symbol.
       They may be reordered, or space inserted, if you wish. */
    snprintf(pager_progress_str, sizeof(pager_progress_str), _("%ld%%"), percent);
  }
  else
  {
    const char *msg = (priv->top_line == 0) ?
                          /* L10N: Status bar message: the entire email is visible in the pager */
                          _("all") :
                          /* L10N: Status bar message: the end of the email is visible in the pager */
                          _("end");
    mutt_str_copy(pager_progress_str, msg, sizeof(pager_progress_str));
  }
 
  if ((priv->pview->mode == PAGER_MODE_EMAIL) || (priv->pview->mode == PAGER_MODE_ATTACH_E))
  {
    int msg_in_pager = shared->mailbox_view ? shared->mailbox_view->msg_in_pager : -1;
 
    const struct Expando *c_pager_format = cs_subset_expando(shared->sub, "pager_format");
    mutt_make_string(buf, win->state.cols, c_pager_format, shared->mailbox, msg_in_pager,
                     shared->email, MUTT_FORMAT_NO_FLAGS, pager_progress_str);
  }
  else
  {
    buf_printf(buf, "%s (%s)", priv->pview->banner, pager_progress_str);
  }
 
  if (!mutt_str_equal(buf_string(buf), pbar_data->pager_format))
  {
    mutt_str_replace(&pbar_data->pager_format, buf_string(buf));
    win->actions |= WA_REPAINT;
  }
 
  buf_pool_release(&buf);
  return 0;
}

static int pbar_repaint(struct MuttWindow *win)
{
  struct PBarPrivateData *pbar_data = win->wdata;
 
  mutt_window_move(win, 0, 0);
  mutt_curses_set_normal_backed_color_by_id(MT_COLOR_STATUS);
  mutt_window_clrtoeol(win);
 
  mutt_window_move(win, 0, 0);
  mutt_draw_statusline(win, win->state.cols, pbar_data->pager_format,
                       mutt_str_len(pbar_data->pager_format));
  mutt_curses_set_color_by_id(MT_COLOR_NORMAL);
 
  mutt_debug(LL_DEBUG5, "repaint done\n");
  return 0;
}

static int pbar_color_observer(struct NotifyCallback *nc)
{
  if (nc->event_type != NT_COLOR)
    return 0;
  if (!nc->global_data || !nc->event_data)
    return -1;
 
  struct EventColor *ev_c = nc->event_data;
  enum ColorId cid = ev_c->cid;
 
  if ((cid != MT_COLOR_STATUS) && (cid != MT_COLOR_NORMAL) && (cid != MT_COLOR_MAX))
    return 0;
 
  struct MuttWindow *win_pbar = nc->global_data;
  win_pbar->actions |= WA_REPAINT;
  mutt_debug(LL_DEBUG5, "color done, request WA_REPAINT\n");
 
  return 0;
}

static int pbar_config_observer(struct NotifyCallback *nc)
{
  if (nc->event_type != NT_CONFIG)
    return 0;
  if (!nc->global_data || !nc->event_data)
    return -1;
 
  struct EventConfig *ev_c = nc->event_data;
  if (!mutt_str_equal(ev_c->name, "pager_format"))
    return 0;
 
  struct MuttWindow *win_pbar = nc->global_data;
  win_pbar->actions |= WA_RECALC;
  mutt_debug(LL_DEBUG5, "config done, request WA_RECALC\n");
 
  return 0;
}

static int pbar_index_observer(struct NotifyCallback *nc)
{
  if (!nc->global_data)
    return -1;
 
  struct MuttWindow *win_pbar = nc->global_data;
  win_pbar->actions |= WA_RECALC;
  mutt_debug(LL_DEBUG5, "index done, request WA_RECALC\n");
 
  return 0;
}

static int pbar_pager_observer(struct NotifyCallback *nc)
{
  if (nc->event_type != NT_PAGER)
    return 0;
  if (!nc->global_data)
    return -1;
 
  struct MuttWindow *win_pbar = nc->global_data;
 
  if (nc->event_subtype & NT_PAGER_VIEW)
  {
    win_pbar->actions |= WA_RECALC;
    mutt_debug(LL_DEBUG5, "pager done, request WA_RECALC\n");
  }
 
  return 0;
}

static int pbar_window_observer(struct NotifyCallback *nc)
{
  if (nc->event_type != NT_WINDOW)
    return 0;
  if (!nc->global_data || !nc->event_data)
    return -1;
 
  struct MuttWindow *win_pbar = nc->global_data;
  struct EventWindow *ev_w = nc->event_data;
  if (ev_w->win != win_pbar)
    return 0;
 
  if (nc->event_subtype == NT_WINDOW_STATE)
  {
    win_pbar->actions |= WA_RECALC | WA_REPAINT;
    mutt_debug(LL_NOTIFY, "window state done, request WA_RECALC\n");
  }
  else if (nc->event_subtype == NT_WINDOW_DELETE)
  {
    struct PBarPrivateData *pbar_data = win_pbar->wdata;
    struct IndexSharedData *shared = pbar_data->shared;
 
    mutt_color_observer_remove(pbar_color_observer, win_pbar);
    notify_observer_remove(NeoMutt->sub->notify, pbar_config_observer, win_pbar);
    notify_observer_remove(shared->notify, pbar_index_observer, win_pbar);
    notify_observer_remove(pbar_data->priv->notify, pbar_pager_observer, win_pbar);
    notify_observer_remove(win_pbar->notify, pbar_window_observer, win_pbar);
 
    mutt_debug(LL_DEBUG5, "window delete done\n");
  }
 
  return 0;
}

static void pbar_data_free(struct MuttWindow *win, void **ptr)
{
  if (!ptr || !*ptr)
    return;
 
  struct PBarPrivateData *pbar_data = *ptr;
 
  FREE(&pbar_data->pager_format);
 
  FREE(ptr);
}

static struct PBarPrivateData *pbar_data_new(struct IndexSharedData *shared,
                                             struct PagerPrivateData *priv)
{
  struct PBarPrivateData *pbar_data = MUTT_MEM_CALLOC(1, struct PBarPrivateData);
 
  pbar_data->shared = shared;
  pbar_data->priv = priv;
 
  return pbar_data;
}

struct MuttWindow *pbar_new(struct IndexSharedData *shared, struct PagerPrivateData *priv)
{
  struct MuttWindow *win_pbar = mutt_window_new(WT_STATUS_BAR, MUTT_WIN_ORIENT_VERTICAL,
                                                MUTT_WIN_SIZE_FIXED,
                                                MUTT_WIN_SIZE_UNLIMITED, 1);
 
  win_pbar->wdata = pbar_data_new(shared, priv);
  win_pbar->wdata_free = pbar_data_free;
  win_pbar->recalc = pbar_recalc;
  win_pbar->repaint = pbar_repaint;
 
  mutt_color_observer_add(pbar_color_observer, win_pbar);
  notify_observer_add(NeoMutt->sub->notify, NT_CONFIG, pbar_config_observer, win_pbar);
  notify_observer_add(shared->notify, NT_ALL, pbar_index_observer, win_pbar);
  notify_observer_add(priv->notify, NT_PAGER, pbar_pager_observer, win_pbar);
  notify_observer_add(win_pbar->notify, NT_WINDOW, pbar_window_observer, win_pbar);
 
  return win_pbar;
}