/src/neomutt/pager/pager.c

Source (jump to first uncovered line)
/**
 * @file
 * Pager Window
 *
 * @authors
 * Copyright (C) 2021 Richard Russon <rich@flatcap.org>
 *
 * @copyright
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * @page pager_pager Pager Window
 *
 * The Pager Window displays an email to the user.
 *
 * ## Windows
 *
 * | Name         | Type      | See Also           |
 * | :----------- | :-------- | :----------------- |
 * | Pager Window | WT_CUSTOM | pager_window_new() |
 *
 * **Parent**
 * - @ref pager_ppanel
 *
 * **Children**
 *
 * None.
 *
 * ## Data
 * - #PagerPrivateData
 *
 * The Pager Window stores its data (#PagerPrivateData) in MuttWindow::wdata.
 *
 * ## Events
 *
 * Once constructed, it is controlled by the following events:
 *
 * | Event Type            | Handler                 |
 * | :-------------------- | :---------------------- |
 * | #NT_COLOR             | pager_color_observer()  |
 * | #NT_CONFIG            | pager_config_observer() |
 * | #NT_INDEX             | pager_index_observer()  |
 * | #NT_PAGER             | pager_pager_observer()  |
 * | #NT_WINDOW            | pager_window_observer() |
 * | MuttWindow::recalc()  | pager_recalc()          |
 * | MuttWindow::repaint() | pager_repaint()         |
 */

#include "config.h"
#include <stddef.h>
#include <inttypes.h> // IWYU pragma: keep
#include <stdbool.h>
#include <sys/stat.h>
#include "mutt/lib.h"
#include "config/lib.h"
#include "core/lib.h"
#include "gui/lib.h"
#include "lib.h"
#include "color/lib.h"
#include "index/lib.h"
#include "display.h"
#include "opcodes.h"
#include "private_data.h"

/**
 * config_pager_index_lines - React to changes to $pager_index_lines
 * @param win Pager Window
 * @retval  0 Successfully handled
 * @retval -1 Error
 */
static int config_pager_index_lines(struct MuttWindow *win)
{
  if (!mutt_window_is_visible(win))
    return 0;

  struct MuttWindow *dlg = dialog_find(win);
  struct MuttWindow *panel_index = window_find_child(dlg, WT_INDEX);
  struct MuttWindow *win_index = window_find_child(panel_index, WT_MENU);
  if (!win_index)
    return -1;

  const short c_pager_index_lines = cs_subset_number(NeoMutt->sub, "pager_index_lines");

  if (c_pager_index_lines > 0)
  {
    win_index->req_rows = c_pager_index_lines;
    win_index->size = MUTT_WIN_SIZE_FIXED;

    panel_index->size = MUTT_WIN_SIZE_MINIMISE;
    panel_index->state.visible = true;
  }
  else
  {
    win_index->req_rows = MUTT_WIN_SIZE_UNLIMITED;
    win_index->size = MUTT_WIN_SIZE_MAXIMISE;

    panel_index->size = MUTT_WIN_SIZE_MAXIMISE;
    panel_index->state.visible = false;
  }

  mutt_window_reflow(dlg);
  mutt_debug(LL_DEBUG5, "config, request WA_REFLOW\n");
  return 0;
}

/**
 * pager_recalc - Recalculate the Pager display - Implements MuttWindow::recalc() - @ingroup window_recalc
 */
static int pager_recalc(struct MuttWindow *win)
{
  win->actions |= WA_REPAINT;
  mutt_debug(LL_DEBUG5, "recalc done, request WA_REPAINT\n");
  return 0;
}

/**
 * pager_repaint - Repaint the Pager display - Implements MuttWindow::repaint() - @ingroup window_repaint
 */
static int pager_repaint(struct MuttWindow *win)
{
  struct PagerPrivateData *priv = win->wdata;
  if (!priv || !priv->pview || !priv->pview->pdata)
    return 0;

#ifdef USE_DEBUG_COLOR
  dump_pager(priv);
#endif

  // We need to populate more lines, but not change position
  const bool repopulate = (priv->cur_line > priv->lines_used);
  if ((priv->redraw & PAGER_REDRAW_FLOW) || repopulate)
  {
    if (!(priv->pview->flags & MUTT_PAGER_RETWINCH))
    {
      priv->win_height = -1;
      for (int i = 0; i <= priv->top_line; i++)
        if (!priv->lines[i].cont_line)
          priv->win_height++;
      for (int i = 0; i < priv->lines_max; i++)
      {
        priv->lines[i].offset = 0;
        priv->lines[i].cid = -1;
        priv->lines[i].cont_line = false;
        priv->lines[i].syntax_arr_size = 0;
        priv->lines[i].search_arr_size = -1;
        priv->lines[i].quote = NULL;

        mutt_mem_realloc(&(priv->lines[i].syntax), sizeof(struct TextSyntax));
        if (priv->search_compiled && priv->lines[i].search)
          FREE(&(priv->lines[i].search));
      }

      if (!repopulate)
      {
        priv->lines_used = 0;
        priv->top_line = 0;
      }
    }
    int i = -1;
    int j = -1;
    while (display_line(priv->fp, &priv->bytes_read, &priv->lines, ++i,
                        &priv->lines_used, &priv->lines_max,
                        priv->has_types | priv->search_flag | (priv->pview->flags & MUTT_PAGER_NOWRAP),
                        &priv->quote_list, &priv->q_level, &priv->force_redraw,
                        &priv->search_re, priv->pview->win_pager, &priv->ansi_list) == 0)
    {
      if (!priv->lines[i].cont_line && (++j == priv->win_height))
      {
        if (!repopulate)
          priv->top_line = i;
        if (!priv->search_flag)
          break;
      }
    }
  }

  if ((priv->redraw & PAGER_REDRAW_PAGER) || (priv->top_line != priv->old_top_line))
  {
    do
    {
      mutt_window_move(priv->pview->win_pager, 0, 0);
      priv->cur_line = priv->top_line;
      priv->old_top_line = priv->top_line;
      priv->win_height = 0;
      priv->force_redraw = false;

      while ((priv->win_height < priv->pview->win_pager->state.rows) &&
             (priv->lines[priv->cur_line].offset <= priv->st.st_size - 1))
      {
        if (display_line(priv->fp, &priv->bytes_read, &priv->lines,
                         priv->cur_line, &priv->lines_used, &priv->lines_max,
                         (priv->pview->flags & MUTT_DISPLAYFLAGS) | priv->hide_quoted |
                             priv->search_flag | (priv->pview->flags & MUTT_PAGER_NOWRAP),
                         &priv->quote_list, &priv->q_level, &priv->force_redraw,
                         &priv->search_re, priv->pview->win_pager, &priv->ansi_list) > 0)
        {
          priv->win_height++;
        }
        priv->cur_line++;
        mutt_window_move(priv->pview->win_pager, 0, priv->win_height);
      }
    } while (priv->force_redraw);

    const bool c_tilde = cs_subset_bool(NeoMutt->sub, "tilde");
    mutt_curses_set_normal_backed_color_by_id(MT_COLOR_TILDE);
    while (priv->win_height < priv->pview->win_pager->state.rows)
    {
      mutt_window_clrtoeol(priv->pview->win_pager);
      if (c_tilde)
        mutt_window_addch(priv->pview->win_pager, '~');
      priv->win_height++;
      mutt_window_move(priv->pview->win_pager, 0, priv->win_height);
    }
    mutt_curses_set_color_by_id(MT_COLOR_NORMAL);
  }

  priv->redraw = PAGER_REDRAW_NO_FLAGS;
  mutt_debug(LL_DEBUG5, "repaint done\n");
  return 0;
}

/**
 * pager_color_observer - Notification that a Color has changed - Implements ::observer_t - @ingroup observer_api
 */
static int pager_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;
  struct MuttWindow *win_pager = nc->global_data;
  struct PagerPrivateData *priv = win_pager->wdata;
  if (!priv)
    return 0;

  // MT_COLOR_MAX is sent on `uncolor *`
  if ((ev_c->cid == MT_COLOR_QUOTED) || (ev_c->cid == MT_COLOR_MAX))
  {
    // rework quoted colours
    qstyle_recolour(priv->quote_list);
  }

  if (ev_c->cid == MT_COLOR_MAX)
  {
    for (size_t i = 0; i < priv->lines_max; i++)
    {
      FREE(&(priv->lines[i].syntax));
    }
    priv->lines_used = 0;
  }

  mutt_debug(LL_DEBUG5, "color done\n");
  return 0;
}

/**
 * pager_config_observer - Notification that a Config Variable has changed - Implements ::observer_t - @ingroup observer_api
 */
static int pager_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;
  struct MuttWindow *win_pager = nc->global_data;

  if (mutt_str_equal(ev_c->name, "pager_index_lines"))
  {
    config_pager_index_lines(win_pager);
    mutt_debug(LL_DEBUG5, "config done\n");
  }

  return 0;
}

/**
 * pager_global_observer - Notification that a Global Event occurred - Implements ::observer_t - @ingroup observer_api
 */
static int pager_global_observer(struct NotifyCallback *nc)
{
  if (nc->event_type != NT_GLOBAL)
    return 0;
  if (!nc->global_data)
    return -1;
  if (nc->event_subtype != NT_GLOBAL_COMMAND)
    return 0;

  struct MuttWindow *win_pager = nc->global_data;

  struct PagerPrivateData *priv = win_pager->wdata;
  const struct PagerView *pview = priv ? priv->pview : NULL;
  if (priv && pview && (priv->redraw & PAGER_REDRAW_FLOW) && (pview->flags & MUTT_PAGER_RETWINCH))
  {
    priv->rc = OP_REFORMAT_WINCH;
  }

  return 0;
}

/**
 * pager_index_observer - Notification that the Index has changed - Implements ::observer_t - @ingroup observer_api
 */
static int pager_index_observer(struct NotifyCallback *nc)
{
  if (nc->event_type != NT_INDEX)
    return 0;
  if (!nc->global_data)
    return -1;

  struct MuttWindow *win_pager = nc->global_data;

  struct PagerPrivateData *priv = win_pager->wdata;
  if (!priv)
    return 0;

  struct IndexSharedData *shared = nc->event_data;

  if (nc->event_subtype & NT_INDEX_MAILBOX)
  {
    win_pager->actions |= WA_RECALC;
    mutt_debug(LL_DEBUG5, "index done, request WA_RECALC\n");
    priv->loop = PAGER_LOOP_QUIT;
  }
  else if (nc->event_subtype & NT_INDEX_EMAIL)
  {
    win_pager->actions |= WA_RECALC;
    mutt_debug(LL_DEBUG5, "index done, request WA_RECALC\n");
    priv->pager_redraw = true;
    if (shared && shared->email && (priv->loop != PAGER_LOOP_QUIT))
    {
      priv->loop = PAGER_LOOP_RELOAD;
    }
    else
    {
      priv->loop = PAGER_LOOP_QUIT;
      priv->rc = 0;
    }
  }

  return 0;
}

/**
 * pager_pager_observer - Notification that the Pager has changed - Implements ::observer_t - @ingroup observer_api
 */
static int pager_pager_observer(struct NotifyCallback *nc)
{
  if (nc->event_type != NT_PAGER)
    return 0;
  if (!nc->global_data || !nc->event_data)
    return -1;

  mutt_debug(LL_DEBUG5, "pager done\n");
  return 0;
}

/**
 * pager_window_observer - Notification that a Window has changed - Implements ::observer_t - @ingroup observer_api
 */
static int pager_window_observer(struct NotifyCallback *nc)
{
  if (nc->event_type != NT_WINDOW)
    return 0;
  if (!nc->global_data || !nc->event_data)
    return -1;
  if (nc->event_subtype != NT_WINDOW_DELETE)
    return 0;

  struct MuttWindow *win_pager = nc->global_data;
  struct EventWindow *ev_w = nc->event_data;
  if (ev_w->win != win_pager)
    return 0;

  struct MuttWindow *dlg = window_find_parent(win_pager, WT_DLG_INDEX);
  if (!dlg)
    dlg = window_find_parent(win_pager, WT_DLG_DO_PAGER);

  struct IndexSharedData *shared = dlg->wdata;

  notify_observer_remove(NeoMutt->notify, pager_color_observer, win_pager);
  notify_observer_remove(NeoMutt->notify, pager_config_observer, win_pager);
  notify_observer_remove(NeoMutt->notify, pager_global_observer, win_pager);
  notify_observer_remove(shared->notify, pager_index_observer, win_pager);
  notify_observer_remove(shared->notify, pager_pager_observer, win_pager);
  notify_observer_remove(win_pager->notify, pager_window_observer, win_pager);

  mutt_debug(LL_DEBUG5, "window delete done\n");

  return 0;
}

/**
 * pager_window_new - Create a new Pager Window (list of Emails)
 * @param shared Shared Index Data
 * @param priv   Private Pager Data
 * @retval ptr New Window
 */
struct MuttWindow *pager_window_new(struct IndexSharedData *shared,
                                    struct PagerPrivateData *priv)
{
  struct MuttWindow *win = mutt_window_new(WT_CUSTOM, MUTT_WIN_ORIENT_VERTICAL,
                                           MUTT_WIN_SIZE_MAXIMISE, MUTT_WIN_SIZE_UNLIMITED,
                                           MUTT_WIN_SIZE_UNLIMITED);
  win->wdata = priv;
  win->recalc = pager_recalc;
  win->repaint = pager_repaint;

  notify_observer_add(NeoMutt->notify, NT_COLOR, pager_color_observer, win);
  notify_observer_add(NeoMutt->notify, NT_CONFIG, pager_config_observer, win);
  notify_observer_add(NeoMutt->notify, NT_GLOBAL, pager_global_observer, win);
  notify_observer_add(shared->notify, NT_ALL, pager_index_observer, win);
  notify_observer_add(shared->notify, NT_PAGER, pager_pager_observer, win);
  notify_observer_add(win->notify, NT_WINDOW, pager_window_observer, win);

  return win;
}

Coverage Report

Created: 2023-06-07 06:15

Line	Count	Source (jump to first uncovered line)
1		/**
2		* @file
3		* Pager Window
4		*
5		* @authors
6		* Copyright (C) 2021 Richard Russon <rich@flatcap.org>
7		*
8		* @copyright
9		* This program is free software: you can redistribute it and/or modify it under
10		* the terms of the GNU General Public License as published by the Free Software
11		* Foundation, either version 2 of the License, or (at your option) any later
12		* version.
13		*
14		* This program is distributed in the hope that it will be useful, but WITHOUT
15		* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
16		* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
17		* details.
18		*
19		* You should have received a copy of the GNU General Public License along with
20		* this program. If not, see <http://www.gnu.org/licenses/>.
21		*/
22
23		/**
24		* @page pager_pager Pager Window
25		*
26		* The Pager Window displays an email to the user.
27		*
28		* ## Windows
29		*
30		* \| Name \| Type \| See Also \|
31		* \| :----------- \| :-------- \| :----------------- \|
32		* \| Pager Window \| WT_CUSTOM \| pager_window_new() \|
33		*
34		* Parent
35		* - @ref pager_ppanel
36		*
37		* Children
38		*
39		* None.
40		*
41		* ## Data
42		* - #PagerPrivateData
43		*
44		* The Pager Window stores its data (#PagerPrivateData) in MuttWindow::wdata.
45		*
46		* ## Events
47		*
48		* Once constructed, it is controlled by the following events:
49		*
50		* \| Event Type \| Handler \|
51		* \| :-------------------- \| :---------------------- \|
52		* \| #NT_COLOR \| pager_color_observer() \|
53		* \| #NT_CONFIG \| pager_config_observer() \|
54		* \| #NT_INDEX \| pager_index_observer() \|
55		* \| #NT_PAGER \| pager_pager_observer() \|
56		* \| #NT_WINDOW \| pager_window_observer() \|
57		* \| MuttWindow::recalc() \| pager_recalc() \|
58		* \| MuttWindow::repaint() \| pager_repaint() \|
59		*/
60
61		#include "config.h"
62		#include <stddef.h>
63		#include <inttypes.h> // IWYU pragma: keep
64		#include <stdbool.h>
65		#include <sys/stat.h>
66		#include "mutt/lib.h"
67		#include "config/lib.h"
68		#include "core/lib.h"
69		#include "gui/lib.h"
70		#include "lib.h"
71		#include "color/lib.h"
72		#include "index/lib.h"
73		#include "display.h"
74		#include "opcodes.h"
75		#include "private_data.h"
76
77		/**
78		* config_pager_index_lines - React to changes to $pager_index_lines
79		* @param win Pager Window
80		* @retval 0 Successfully handled
81		* @retval -1 Error
82		*/
83		static int config_pager_index_lines(struct MuttWindow *win)
84	0	{
85	0	if (!mutt_window_is_visible(win))
86	0	return 0;
87
88	0	struct MuttWindow *dlg = dialog_find(win);
89	0	struct MuttWindow *panel_index = window_find_child(dlg, WT_INDEX);
90	0	struct MuttWindow *win_index = window_find_child(panel_index, WT_MENU);
91	0	if (!win_index)
92	0	return -1;
93
94	0	const short c_pager_index_lines = cs_subset_number(NeoMutt->sub, "pager_index_lines");
95
96	0	if (c_pager_index_lines > 0)
97	0	{
98	0	win_index->req_rows = c_pager_index_lines;
99	0	win_index->size = MUTT_WIN_SIZE_FIXED;
100
101	0	panel_index->size = MUTT_WIN_SIZE_MINIMISE;
102	0	panel_index->state.visible = true;
103	0	}
104	0	else
105	0	{
106	0	win_index->req_rows = MUTT_WIN_SIZE_UNLIMITED;
107	0	win_index->size = MUTT_WIN_SIZE_MAXIMISE;
108
109	0	panel_index->size = MUTT_WIN_SIZE_MAXIMISE;
110	0	panel_index->state.visible = false;
111	0	}
112
113	0	mutt_window_reflow(dlg);
114	0	mutt_debug(LL_DEBUG5, "config, request WA_REFLOW\n");
115	0	return 0;
116	0	}
117
118		/**
119		* pager_recalc - Recalculate the Pager display - Implements MuttWindow::recalc() - @ingroup window_recalc
120		*/
121		static int pager_recalc(struct MuttWindow *win)
122	0	{
123	0	win->actions \|= WA_REPAINT;
124	0	mutt_debug(LL_DEBUG5, "recalc done, request WA_REPAINT\n");
125	0	return 0;
126	0	}
127
128		/**
129		* pager_repaint - Repaint the Pager display - Implements MuttWindow::repaint() - @ingroup window_repaint
130		*/
131		static int pager_repaint(struct MuttWindow *win)
132	0	{
133	0	struct PagerPrivateData *priv = win->wdata;
134	0	if (!priv \|\| !priv->pview \|\| !priv->pview->pdata)
135	0	return 0;
136
137		#ifdef USE_DEBUG_COLOR
138		dump_pager(priv);
139		#endif
140
141		// We need to populate more lines, but not change position
142	0	const bool repopulate = (priv->cur_line > priv->lines_used);
143	0	if ((priv->redraw & PAGER_REDRAW_FLOW) \|\| repopulate)
144	0	{
145	0	if (!(priv->pview->flags & MUTT_PAGER_RETWINCH))
146	0	{
147	0	priv->win_height = -1;
148	0	for (int i = 0; i <= priv->top_line; i++)
149	0	if (!priv->lines[i].cont_line)
150	0	priv->win_height++;
151	0	for (int i = 0; i < priv->lines_max; i++)
152	0	{
153	0	priv->lines[i].offset = 0;
154	0	priv->lines[i].cid = -1;
155	0	priv->lines[i].cont_line = false;
156	0	priv->lines[i].syntax_arr_size = 0;
157	0	priv->lines[i].search_arr_size = -1;
158	0	priv->lines[i].quote = NULL;
159
160	0	mutt_mem_realloc(&(priv->lines[i].syntax), sizeof(struct TextSyntax));
161	0	if (priv->search_compiled && priv->lines[i].search)
162	0	FREE(&(priv->lines[i].search));
163	0	}
164
165	0	if (!repopulate)
166	0	{
167	0	priv->lines_used = 0;
168	0	priv->top_line = 0;
169	0	}
170	0	}
171	0	int i = -1;
172	0	int j = -1;
173	0	while (display_line(priv->fp, &priv->bytes_read, &priv->lines, ++i,
174	0	&priv->lines_used, &priv->lines_max,
175	0	priv->has_types \| priv->search_flag \| (priv->pview->flags & MUTT_PAGER_NOWRAP),
176	0	&priv->quote_list, &priv->q_level, &priv->force_redraw,
177	0	&priv->search_re, priv->pview->win_pager, &priv->ansi_list) == 0)
178	0	{
179	0	if (!priv->lines[i].cont_line && (++j == priv->win_height))
180	0	{
181	0	if (!repopulate)
182	0	priv->top_line = i;
183	0	if (!priv->search_flag)
184	0	break;
185	0	}
186	0	}
187	0	}
188
189	0	if ((priv->redraw & PAGER_REDRAW_PAGER) \|\| (priv->top_line != priv->old_top_line))
190	0	{
191	0	do
192	0	{
193	0	mutt_window_move(priv->pview->win_pager, 0, 0);
194	0	priv->cur_line = priv->top_line;
195	0	priv->old_top_line = priv->top_line;
196	0	priv->win_height = 0;
197	0	priv->force_redraw = false;
198
199	0	while ((priv->win_height < priv->pview->win_pager->state.rows) &&
200	0	(priv->lines[priv->cur_line].offset <= priv->st.st_size - 1))
201	0	{
202	0	if (display_line(priv->fp, &priv->bytes_read, &priv->lines,
203	0	priv->cur_line, &priv->lines_used, &priv->lines_max,
204	0	(priv->pview->flags & MUTT_DISPLAYFLAGS) \| priv->hide_quoted \|
205	0	priv->search_flag \| (priv->pview->flags & MUTT_PAGER_NOWRAP),
206	0	&priv->quote_list, &priv->q_level, &priv->force_redraw,
207	0	&priv->search_re, priv->pview->win_pager, &priv->ansi_list) > 0)
208	0	{
209	0	priv->win_height++;
210	0	}
211	0	priv->cur_line++;
212	0	mutt_window_move(priv->pview->win_pager, 0, priv->win_height);
213	0	}
214	0	} while (priv->force_redraw);
215
216	0	const bool c_tilde = cs_subset_bool(NeoMutt->sub, "tilde");
217	0	mutt_curses_set_normal_backed_color_by_id(MT_COLOR_TILDE);
218	0	while (priv->win_height < priv->pview->win_pager->state.rows)
219	0	{
220	0	mutt_window_clrtoeol(priv->pview->win_pager);
221	0	if (c_tilde)
222	0	mutt_window_addch(priv->pview->win_pager, '~');
223	0	priv->win_height++;
224	0	mutt_window_move(priv->pview->win_pager, 0, priv->win_height);
225	0	}
226	0	mutt_curses_set_color_by_id(MT_COLOR_NORMAL);
227	0	}
228
229	0	priv->redraw = PAGER_REDRAW_NO_FLAGS;
230	0	mutt_debug(LL_DEBUG5, "repaint done\n");
231	0	return 0;
232	0	}
233
234		/**
235		* pager_color_observer - Notification that a Color has changed - Implements ::observer_t - @ingroup observer_api
236		*/
237		static int pager_color_observer(struct NotifyCallback *nc)
238	0	{
239	0	if (nc->event_type != NT_COLOR)
240	0	return 0;
241	0	if (!nc->global_data \|\| !nc->event_data)
242	0	return -1;
243
244	0	struct EventColor *ev_c = nc->event_data;
245	0	struct MuttWindow *win_pager = nc->global_data;
246	0	struct PagerPrivateData *priv = win_pager->wdata;
247	0	if (!priv)
248	0	return 0;
249
250		// MT_COLOR_MAX is sent on `uncolor *`
251	0	if ((ev_c->cid == MT_COLOR_QUOTED) \|\| (ev_c->cid == MT_COLOR_MAX))
252	0	{
253		// rework quoted colours
254	0	qstyle_recolour(priv->quote_list);
255	0	}
256
257	0	if (ev_c->cid == MT_COLOR_MAX)
258	0	{
259	0	for (size_t i = 0; i < priv->lines_max; i++)
260	0	{
261	0	FREE(&(priv->lines[i].syntax));
262	0	}
263	0	priv->lines_used = 0;
264	0	}
265
266	0	mutt_debug(LL_DEBUG5, "color done\n");
267	0	return 0;
268	0	}
269
270		/**
271		* pager_config_observer - Notification that a Config Variable has changed - Implements ::observer_t - @ingroup observer_api
272		*/
273		static int pager_config_observer(struct NotifyCallback *nc)
274	0	{
275	0	if (nc->event_type != NT_CONFIG)
276	0	return 0;
277	0	if (!nc->global_data \|\| !nc->event_data)
278	0	return -1;
279
280	0	struct EventConfig *ev_c = nc->event_data;
281	0	struct MuttWindow *win_pager = nc->global_data;
282
283	0	if (mutt_str_equal(ev_c->name, "pager_index_lines"))
284	0	{
285	0	config_pager_index_lines(win_pager);
286	0	mutt_debug(LL_DEBUG5, "config done\n");
287	0	}
288
289	0	return 0;
290	0	}
291
292		/**
293		* pager_global_observer - Notification that a Global Event occurred - Implements ::observer_t - @ingroup observer_api
294		*/
295		static int pager_global_observer(struct NotifyCallback *nc)
296	0	{
297	0	if (nc->event_type != NT_GLOBAL)
298	0	return 0;
299	0	if (!nc->global_data)
300	0	return -1;
301	0	if (nc->event_subtype != NT_GLOBAL_COMMAND)
302	0	return 0;
303
304	0	struct MuttWindow *win_pager = nc->global_data;
305
306	0	struct PagerPrivateData *priv = win_pager->wdata;
307	0	const struct PagerView *pview = priv ? priv->pview : NULL;
308	0	if (priv && pview && (priv->redraw & PAGER_REDRAW_FLOW) && (pview->flags & MUTT_PAGER_RETWINCH))
309	0	{
310	0	priv->rc = OP_REFORMAT_WINCH;
311	0	}
312
313	0	return 0;
314	0	}
315
316		/**
317		* pager_index_observer - Notification that the Index has changed - Implements ::observer_t - @ingroup observer_api
318		*/
319		static int pager_index_observer(struct NotifyCallback *nc)
320	0	{
321	0	if (nc->event_type != NT_INDEX)
322	0	return 0;
323	0	if (!nc->global_data)
324	0	return -1;
325
326	0	struct MuttWindow *win_pager = nc->global_data;
327
328	0	struct PagerPrivateData *priv = win_pager->wdata;
329	0	if (!priv)
330	0	return 0;
331
332	0	struct IndexSharedData *shared = nc->event_data;
333
334	0	if (nc->event_subtype & NT_INDEX_MAILBOX)
335	0	{
336	0	win_pager->actions \|= WA_RECALC;
337	0	mutt_debug(LL_DEBUG5, "index done, request WA_RECALC\n");
338	0	priv->loop = PAGER_LOOP_QUIT;
339	0	}
340	0	else if (nc->event_subtype & NT_INDEX_EMAIL)
341	0	{
342	0	win_pager->actions \|= WA_RECALC;
343	0	mutt_debug(LL_DEBUG5, "index done, request WA_RECALC\n");
344	0	priv->pager_redraw = true;
345	0	if (shared && shared->email && (priv->loop != PAGER_LOOP_QUIT))
346	0	{
347	0	priv->loop = PAGER_LOOP_RELOAD;
348	0	}
349	0	else
350	0	{
351	0	priv->loop = PAGER_LOOP_QUIT;
352	0	priv->rc = 0;
353	0	}
354	0	}
355
356	0	return 0;
357	0	}
358
359		/**
360		* pager_pager_observer - Notification that the Pager has changed - Implements ::observer_t - @ingroup observer_api
361		*/
362		static int pager_pager_observer(struct NotifyCallback *nc)
363	0	{
364	0	if (nc->event_type != NT_PAGER)
365	0	return 0;
366	0	if (!nc->global_data \|\| !nc->event_data)
367	0	return -1;
368
369	0	mutt_debug(LL_DEBUG5, "pager done\n");
370	0	return 0;
371	0	}
372
373		/**
374		* pager_window_observer - Notification that a Window has changed - Implements ::observer_t - @ingroup observer_api
375		*/
376		static int pager_window_observer(struct NotifyCallback *nc)
377	0	{
378	0	if (nc->event_type != NT_WINDOW)
379	0	return 0;
380	0	if (!nc->global_data \|\| !nc->event_data)
381	0	return -1;
382	0	if (nc->event_subtype != NT_WINDOW_DELETE)
383	0	return 0;
384
385	0	struct MuttWindow *win_pager = nc->global_data;
386	0	struct EventWindow *ev_w = nc->event_data;
387	0	if (ev_w->win != win_pager)
388	0	return 0;
389
390	0	struct MuttWindow *dlg = window_find_parent(win_pager, WT_DLG_INDEX);
391	0	if (!dlg)
392	0	dlg = window_find_parent(win_pager, WT_DLG_DO_PAGER);
393
394	0	struct IndexSharedData *shared = dlg->wdata;
395
396	0	notify_observer_remove(NeoMutt->notify, pager_color_observer, win_pager);
397	0	notify_observer_remove(NeoMutt->notify, pager_config_observer, win_pager);
398	0	notify_observer_remove(NeoMutt->notify, pager_global_observer, win_pager);
399	0	notify_observer_remove(shared->notify, pager_index_observer, win_pager);
400	0	notify_observer_remove(shared->notify, pager_pager_observer, win_pager);
401	0	notify_observer_remove(win_pager->notify, pager_window_observer, win_pager);
402
403	0	mutt_debug(LL_DEBUG5, "window delete done\n");
404
405	0	return 0;
406	0	}
407
408		/**
409		* pager_window_new - Create a new Pager Window (list of Emails)
410		* @param shared Shared Index Data
411		* @param priv Private Pager Data
412		* @retval ptr New Window
413		*/
414		struct MuttWindow pager_window_new(struct IndexSharedData shared,
415		struct PagerPrivateData *priv)
416	0	{
417	0	struct MuttWindow *win = mutt_window_new(WT_CUSTOM, MUTT_WIN_ORIENT_VERTICAL,
418	0	MUTT_WIN_SIZE_MAXIMISE, MUTT_WIN_SIZE_UNLIMITED,
419	0	MUTT_WIN_SIZE_UNLIMITED);
420	0	win->wdata = priv;
421	0	win->recalc = pager_recalc;
422	0	win->repaint = pager_repaint;
423
424	0	notify_observer_add(NeoMutt->notify, NT_COLOR, pager_color_observer, win);
425	0	notify_observer_add(NeoMutt->notify, NT_CONFIG, pager_config_observer, win);
426	0	notify_observer_add(NeoMutt->notify, NT_GLOBAL, pager_global_observer, win);
427	0	notify_observer_add(shared->notify, NT_ALL, pager_index_observer, win);
428	0	notify_observer_add(shared->notify, NT_PAGER, pager_pager_observer, win);
429	0	notify_observer_add(win->notify, NT_WINDOW, pager_window_observer, win);
430
431	0	return win;
432	0	}