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view.c
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/* Copyright (c) 2006-2022 Jonas Fonseca <jonas.fonseca@gmail.com>
*
* 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.
*/
#include "tig/tig.h"
#include "tig/argv.h"
#include "tig/repo.h"
#include "tig/watch.h"
#include "tig/options.h"
#include "tig/view.h"
#include "tig/search.h"
#include "tig/draw.h"
#include "tig/display.h"
#include "tig/io.h"
/*
* Navigation
*/
bool
goto_view_line(struct view *view, unsigned long offset, unsigned long lineno)
{
if (lineno >= view->lines)
lineno = view->lines > 0 ? view->lines - 1 : 0;
if (offset > lineno || offset + view->height <= lineno) {
unsigned long half = view->height / 2;
if (lineno > half)
offset = lineno - half;
else
offset = 0;
}
if (offset != view->pos.offset || lineno != view->pos.lineno) {
view->pos.offset = offset;
view->pos.lineno = lineno;
return true;
}
return false;
}
/* Scrolling backend */
void
do_scroll_view(struct view *view, int lines)
{
bool redraw_current_line = false;
/* The rendering expects the new offset. */
view->pos.offset += lines;
assert(0 <= view->pos.offset && view->pos.offset < view->lines);
//assert(lines);
/* Move current line into the view. */
if (view->pos.lineno < view->pos.offset) {
view->pos.lineno = view->pos.offset;
redraw_current_line = true;
} else if (view->pos.lineno >= view->pos.offset + view->height) {
view->pos.lineno = view->pos.offset + view->height - 1;
redraw_current_line = true;
}
assert(view->pos.offset <= view->pos.lineno && view->pos.lineno < view->lines);
/* Redraw the whole screen if scrolling is pointless. */
if (view->height < ABS(lines)) {
redraw_view(view);
} else {
int line = lines > 0 ? view->height - lines : 0;
int end = line + ABS(lines);
scrollok(view->win, true);
wscrl(view->win, lines);
scrollok(view->win, false);
while (line < end && draw_view_line(view, line))
line++;
if (redraw_current_line)
draw_view_line(view, view->pos.lineno - view->pos.offset);
wnoutrefresh(view->win);
}
report_clear();
}
/* Scroll frontend */
void
scroll_view(struct view *view, enum request request)
{
int lines = 1;
unsigned long orig_offset, orig_lineno;
int move_lines;
int i;
assert(view_is_displayed(view));
if (request == REQ_SCROLL_WHEEL_DOWN || request == REQ_SCROLL_WHEEL_UP)
lines = opt_mouse_scroll;
switch (request) {
case REQ_SCROLL_FIRST_COL:
view->pos.col = 0;
redraw_view_from(view, 0);
report_clear();
return;
case REQ_SCROLL_LEFT:
if (view->pos.col == 0) {
report("Cannot scroll beyond the first column");
return;
}
if (view->pos.col <= apply_step(opt_horizontal_scroll, view->width))
view->pos.col = 0;
else
view->pos.col -= apply_step(opt_horizontal_scroll, view->width);
redraw_view_from(view, 0);
report_clear();
return;
case REQ_SCROLL_RIGHT:
view->pos.col += apply_step(opt_horizontal_scroll, view->width);
redraw_view(view);
report_clear();
return;
case REQ_SCROLL_PAGE_DOWN:
case REQ_SCROLL_HALF_PAGE_DOWN:
lines = request == REQ_SCROLL_PAGE_DOWN ? view->height : view->height / 2;
/* Fall-through */
case REQ_SCROLL_WHEEL_DOWN:
case REQ_SCROLL_LINE_DOWN:
if (view->pos.offset + lines > view->lines)
lines = view->lines - view->pos.offset;
// do not scroll past bottom ...
if ((view->pos.offset + view->height + lines) > view->lines)
lines = view->lines - view->pos.offset - view->height;
if (lines == 0 || view->pos.offset + view->height >= view->lines) {
report("Cannot scroll beyond the last line");
// if wanted to move down when can no longer scroll ...
// move_view(view, REQ_MOVE_DOWN);
return;
}
break;
case REQ_SCROLL_PAGE_UP:
case REQ_SCROLL_HALF_PAGE_UP:
lines = request == REQ_SCROLL_PAGE_UP ? view->height : view->height / 2;
/* Fall-through */
case REQ_SCROLL_LINE_UP:
case REQ_SCROLL_WHEEL_UP:
if (lines > view->pos.offset)
lines = view->pos.offset;
if (lines == 0) {
report("Cannot scroll beyond the first line");
// if wanted to move up when can no longer scroll ...
// move_view(view, REQ_MOVE_UP);
return;
}
lines = -lines;
break;
case REQ_SCROLL_CURSOR_CENTER:
log("cursor center\n");
log(" view->height: %d\n", (int) (view->height));
log(" view->pos.lineno: %d\n", (int) (view->pos.lineno));
log(" view->pos.offset: %d\n", (int) (view->pos.offset));
lines = -(view->height / 2 - (view->pos.lineno - view->pos.offset));
if ((int)view->pos.offset + (int)lines < 0) lines = -view->pos.offset;
break;
case REQ_SCROLL_CURSOR_TOP:
lines = (view->pos.lineno - view->pos.offset);
break;
default:
die("request %d not handled in switch", request);
}
orig_offset = view->pos.offset;
orig_lineno = view->pos.lineno;
do_scroll_view(view, lines);
move_lines = (view->pos.offset - orig_offset) - (view->pos.lineno - orig_lineno);
for (i = 0; i < ABS(move_lines); i++)
move_view(view, move_lines < 0 ? REQ_MOVE_UP : REQ_MOVE_DOWN);
}
/* Cursor moving */
void
move_view(struct view *view, enum request request)
{
int scroll_steps = 0;
int steps;
switch (request) {
case REQ_MOVE_FIRST_LINE:
steps = -view->pos.lineno;
break;
case REQ_MOVE_LAST_LINE:
steps = view->lines - view->pos.lineno - 1;
break;
case REQ_MOVE_PAGE_UP:
steps = view->height > view->pos.lineno
? -view->pos.lineno : -view->height;
break;
case REQ_MOVE_PAGE_DOWN:
steps = view->pos.lineno + view->height >= view->lines
? view->lines - view->pos.lineno - 1 : view->height;
break;
case REQ_MOVE_HALF_PAGE_UP:
steps = view->height / 2 > view->pos.lineno
? -view->pos.lineno : -(view->height / 2);
break;
case REQ_MOVE_HALF_PAGE_DOWN:
steps = view->pos.lineno + view->height / 2 >= view->lines
? view->lines - view->pos.lineno - 1 : view->height / 2;
break;
case REQ_MOVE_WHEEL_DOWN:
steps = view->pos.lineno + opt_mouse_scroll >= view->lines
? view->lines - view->pos.lineno - 1 : opt_mouse_scroll;
break;
case REQ_MOVE_WHEEL_UP:
steps = opt_mouse_scroll > view->pos.lineno
? -view->pos.lineno : -opt_mouse_scroll;
break;
case REQ_MOVE_CURSOR_CENTER:
steps = view->height/2 - (view->pos.lineno - view->pos.offset);
break;
case REQ_MOVE_CURSOR_TOP:
steps = -(view->pos.lineno - view->pos.offset);
break;
case REQ_MOVE_CURSOR_BOTTOM:
steps = view->height - (view->pos.lineno - view->pos.offset) - 1;
if ( view->pos.lineno + steps >= view->lines )
{
steps = view->lines - view->pos.lineno - 1;
}
break;
case REQ_MOVE_UP:
case REQ_PREVIOUS:
steps = -1;
break;
case REQ_MOVE_DOWN:
case REQ_NEXT:
steps = 1;
break;
default:
die("request %d not handled in switch", request);
}
if (steps <= 0 && view->pos.lineno == 0) {
report("Cannot move beyond the first line");
return;
} else if (steps >= 0 && view->pos.lineno + 1 >= view->lines) {
report("Cannot move beyond the last line");
return;
}
/* Move the current line */
view->pos.lineno += steps;
assert(0 <= view->pos.lineno && view->pos.lineno < view->lines);
/* Check whether the view needs to be scrolled */
if (view->pos.lineno < view->pos.offset ||
view->pos.lineno >= view->pos.offset + view->height) {
scroll_steps = steps;
if (steps < 0 && -steps > view->pos.offset) {
scroll_steps = -view->pos.offset;
} else if (steps > 0) {
if (view->pos.lineno == view->lines - 1 &&
view->lines > view->height) {
scroll_steps = view->lines - view->pos.offset - 1;
if (scroll_steps >= view->height)
scroll_steps -= view->height - 1;
}
}
}
if (!view_is_displayed(view)) {
view->pos.offset += scroll_steps;
assert(0 <= view->pos.offset && view->pos.offset < view->lines);
view->ops->select(view, &view->line[view->pos.lineno]);
return;
}
/* Repaint the old "current" line if we be scrolling */
if (ABS(steps) < view->height)
draw_view_line(view, view->pos.lineno - steps - view->pos.offset);
if (scroll_steps) {
do_scroll_view(view, scroll_steps);
return;
}
/* Draw the current line */
draw_view_line(view, view->pos.lineno - view->pos.offset);
wnoutrefresh(view->win);
report_clear();
}
void
select_view_line(struct view *view, unsigned long lineno)
{
struct position old = view->pos;
if (goto_view_line(view, view->pos.offset, lineno)) {
if (view_is_displayed(view)) {
if (old.offset != view->pos.offset) {
redraw_view(view);
} else {
draw_view_line(view, old.lineno - view->pos.offset);
draw_view_line(view, view->pos.lineno - view->pos.offset);
wnoutrefresh(view->win);
}
} else {
view->ops->select(view, &view->line[view->pos.lineno]);
}
}
}
void
goto_id(struct view *view, const char *expr, bool from_start, bool save_search)
{
struct view_column_data column_data = {0};
char id[SIZEOF_STR] = "";
size_t idlen;
struct line *line = &view->line[view->pos.lineno];
if (!(view->ops->column_bits & view_column_bit(ID))) {
report("Jumping to ID is not supported by the %s view", view->name);
return;
} else {
char tmp[SIZEOF_STR];
char *rev = (snprintf(tmp, SIZEOF_STR, "%s^{}", expr), argv_format_arg(view->env, tmp));
const char *rev_parse_argv[] = {
"git", "rev-parse", "--revs-only", rev, NULL
};
bool ok = rev && io_run_buf(rev_parse_argv, id, sizeof(id), NULL, true);
free(rev);
if (!ok) {
report("Failed to parse expression '%s'", expr);
return;
}
}
if (!id[0]) {
if (view->ops->get_column_data(view, line, &column_data)
&& column_data.id && string_rev_is_null(column_data.id)) {
select_view_line(view, view->pos.lineno + 1);
report_clear();
} else {
report("Expression '%s' is not a meaningful revision", expr);
}
return;
}
line = from_start ? view->line : &view->line[view->pos.lineno];
for (idlen = strlen(id); view_has_line(view, line); line++) {
struct view_column_data column_data = {0};
if (view->ops->get_column_data(view, line, &column_data) &&
column_data.id &&
!strncasecmp(column_data.id, id, idlen)) {
if (save_search)
string_ncopy(view->env->search, id, idlen);
select_view_line(view, line - view->line);
report_clear();
return;
}
}
report("Unable to find commit '%s'", id);
}
/*
* View history
*/
static bool
view_history_is_empty(struct view_history *history)
{
return !history->stack;
}
struct view_state *
push_view_history_state(struct view_history *history, struct position *position, void *data)
{
struct view_state *state = history->stack;
if (state && data && history->state_alloc &&
!memcmp(state->data, data, history->state_alloc))
return state;
state = calloc(1, sizeof(*state) + history->state_alloc);
if (!state)
return NULL;
state->prev = history->stack;
history->stack = state;
clear_position(&history->position);
state->position = *position;
state->data = &state[1];
if (data && history->state_alloc)
memcpy(state->data, data, history->state_alloc);
return state;
}
bool
pop_view_history_state(struct view_history *history, struct position *position, void *data)
{
struct view_state *state = history->stack;
if (view_history_is_empty(history))
return false;
history->position = state->position;
history->stack = state->prev;
if (data && history->state_alloc)
memcpy(data, state->data, history->state_alloc);
if (position)
*position = state->position;
free(state);
return true;
}
void
reset_view_history(struct view_history *history)
{
while (pop_view_history_state(history, NULL, NULL))
;
}
/*
* Incremental updating
*/
void
reset_view(struct view *view)
{
int i;
for (i = 0; i < view->lines; i++)
free(view->line[i].data);
free(view->line);
reset_search(view);
view->prev_pos = view->pos;
/* A view without a previous view is the first view */
if (!view->prev && !view->lines && view->prev_pos.lineno == 0)
view->prev_pos.lineno = view->env->goto_lineno;
clear_position(&view->pos);
if (view->columns)
view_column_reset(view);
view->line = NULL;
view->lines = 0;
view->vid[0] = 0;
view->custom_lines = 0;
view->update_secs = 0;
}
static bool
restore_view_position(struct view *view)
{
/* Ensure that the view position is in a valid state. */
if (!check_position(&view->prev_pos) ||
(view->pipe && view->lines <= view->prev_pos.lineno))
return goto_view_line(view, view->pos.offset, view->pos.lineno);
/* Changing the view position cancels the restoring. */
/* FIXME: Changing back to the first line is not detected. */
if (check_position(&view->pos)) {
clear_position(&view->prev_pos);
return false;
}
if (goto_view_line(view, view->prev_pos.offset, view->prev_pos.lineno) &&
view_is_displayed(view))
werase(view->win);
view->pos.col = view->prev_pos.col;
clear_position(&view->prev_pos);
return true;
}
void
end_update(struct view *view, bool force)
{
if (!view->pipe)
return;
while (!view->ops->read(view, NULL, force))
if (!force)
return;
if (force)
io_kill(view->pipe);
io_done(view->pipe);
view->pipe = NULL;
}
static void
setup_update(struct view *view, const char *vid)
{
reset_view(view);
/* XXX: Do not use string_copy_rev(), it copies until first space. */
string_ncopy(view->vid, vid, strlen(vid));
view->pipe = &view->io;
view->start_time = time(NULL);
}
static bool
view_no_refresh(struct view *view, enum open_flags flags)
{
bool reload = !!(flags & OPEN_ALWAYS_LOAD) || !view->lines;
return (!reload && !strcmp(view->vid, view->ops->id)) ||
((flags & OPEN_REFRESH) && !view_can_refresh(view));
}
static const char *
stat_arg(struct view *view, enum open_flags flags)
{
static char opt_stat_arg[64] = "";
int views = displayed_views();
bool split = (views == 1 && !!(flags & OPEN_SPLIT)) || views == 2;
int height, width;
getmaxyx(stdscr, height, width);
if (split && vertical_split_is_enabled(opt_vertical_split, height, width)) {
bool is_base_view = display[0] == view;
int split_width = apply_vertical_split(width);
if (is_base_view)
width -= split_width;
else
width = split_width - 1;
}
string_format(opt_stat_arg, "--stat=%d", MAX(0, width));
return opt_stat_arg;
}
bool
view_exec(struct view *view, enum open_flags flags)
{
const char **argv = NULL;
int i;
bool ok;
enum io_flags forward_stdin = (flags & OPEN_FORWARD_STDIN) ? IO_RD_FORWARD_STDIN : 0;
enum io_flags with_stderr = (flags & OPEN_WITH_STDERR) ? IO_RD_WITH_STDERR : 0;
enum io_flags io_flags = forward_stdin | with_stderr;
for (i = 0; view->argv[i]; i++) {
const char *arg = view->argv[i];
if (strcmp(arg, "--stat"))
argv_append(&argv, arg);
if (!strcmp(arg, "--stat") || !strcmp(arg, "--patch-with-stat"))
argv_append(&argv, stat_arg(view, flags));
}
ok = io_exec(&view->io, IO_RD, view->dir, NULL, argv, io_flags);
argv_free(argv);
free(argv);
return ok;
}
enum status_code
begin_update(struct view *view, const char *dir, const char **argv, enum open_flags flags)
{
if (!g_BEGIN_UPDATE_IGNORE_FEATURE)
{
if (view->argv_diff)
{
for ( char **argv_p = &view->argv_diff[0]; *argv_p; argv_p++ )
{
free(*argv_p);
}
free(view->argv_diff);
}
if (strcmp(view->name, "diff") != 0 || strcmp(view->name, "stage") != 0)
{
size_t argv_length = 0;
for ( const char **argv_p = &argv[0]; *argv_p && strcmp(*argv_p, "--") != 0; argv_p++ ) argv_length += 1;
view->argv_diff = calloc(argv_length + 1, sizeof(const char *));
view->argv_diff[argv_length] = NULL;
for (size_t i = 0; i < argv_length; i++)
{
// TODO: Expand these instead of throwing them out.
char string[2048];
if (strcmp(argv[i], "%(commit)") == 0)
{
view->argv_diff[i] = calloc(strlen(view->env->commit)+1, sizeof(char));
strncpy(view->argv_diff[i], view->env->commit, strlen(view->env->commit));
}
else if (sscanf(argv[i], "%%(%s)", string) != 0)
{
view->argv_diff[i] = calloc(1, sizeof(char));
strncpy(view->argv_diff[i], "", 1);
}
else
{
view->argv_diff[i] = calloc(strlen(argv[i])+1, sizeof(char));
strncpy(view->argv_diff[i], argv[i], strlen(argv[i]));
}
}
}
else
{
view->argv_diff = calloc(1, sizeof(char *));
view->argv_diff[0] = NULL;
}
}
bool extra = !!(flags & (OPEN_EXTRA));
bool refresh = flags & (OPEN_REFRESH | OPEN_PREPARED | OPEN_STDIN);
if (view_no_refresh(view, flags))
return SUCCESS;
if (view->pipe) {
if (extra)
io_done(view->pipe);
else
end_update(view, true);
}
view->unrefreshable = open_in_pager_mode(flags);
if (!refresh && argv) {
int flags = 0;
if (!view->prev)
flags |= argv_flag_first;
if (!view_has_flags(view, VIEW_FILE_FILTER) || opt_file_filter)
flags |= argv_flag_file_filter;
if (!view_has_flags(view, VIEW_REV_FILTER) || opt_rev_filter)
flags |= argv_flag_rev_filter;
view->dir = dir;
if (!argv_format(view->env, &view->argv, argv, flags))
return error("Failed to format %s arguments", view->name);
}
if (view->argv && view->argv[0] &&
!view_exec(view, flags))
return error("Failed to open %s view", view->name);
if (open_from_stdin(flags)) {
if (!io_open(&view->io, "%s", ""))
die("Failed to open stdin");
}
if (!extra)
setup_update(view, view->ops->id);
return SUCCESS;
}
bool
update_view(struct view *view)
{
/* Clear the view and redraw everything since the tree sorting
* might have rearranged things. */
bool redraw = view->lines == 0;
bool can_read = true;
struct encoding *encoding = view->encoding ? view->encoding : default_encoding;
struct buffer line;
if (!view->pipe)
return true;
if (!io_can_read(view->pipe, false)) {
if (view->lines == 0 && view_is_displayed(view)) {
time_t secs = time(NULL) - view->start_time;
if (secs > 1 && secs > view->update_secs) {
if (view->update_secs == 0)
redraw_view(view);
update_view_title(view);
view->update_secs = secs;
}
}
return true;
}
for (; io_get(view->pipe, &line, '\n', can_read); can_read = false) {
if (encoding && !encoding_convert(encoding, &line))
report("Encoding failure");
if (!view->ops->read(view, &line, false)) {
report("Allocation failure");
end_update(view, true);
return false;
}
}
if (io_error(view->pipe)) {
report("Failed to read: %s", io_strerror(view->pipe));
end_update(view, true);
} else if (io_eof(view->pipe)) {
end_update(view, false);
}
if (restore_view_position(view))
redraw = true;
if (!view_is_displayed(view))
return true;
if (redraw || view->force_redraw)
redraw_view_from(view, 0);
else
redraw_view_dirty(view);
view->force_redraw = false;
/* Update the title _after_ the redraw so that if the redraw picks up a
* commit reference in view->ref it'll be available here. */
update_view_title(view);
reset_search(view);
return true;
}
void
update_view_title(struct view *view)
{
//log("update_view_title\n");
WINDOW *window = view->title;
struct line *line = &view->line[view->pos.lineno];
if (line)
{
if (!opt_file_args && line->type == LINE_DIFF_STAT)
{
view->show_preview = true;
resize_display();
redraw_view(view);
werase(view->preview);
//const char *commit = view->ref;
//const char *file = "test";
//char args[2048];
//snprintf(args, 2048-1, "git show --pretty=format: --root --no-color %s -- %s", commit, file);
//mvwprintw(view->preview, 0, 0, "%s", args);
char cmd[2048];
cmd[0] = '\0';
size_t c = 0;
for ( char **argv_p = &view->argv_diff[0]; *argv_p; argv_p++ )
{
strcat(cmd, *argv_p);
c += strlen(*argv_p);
strcat(cmd, " ");
c += 1;
}
//curses doesn't actually interpret ansi color sequences.
//strcat(cmd, " --color=always ");
strcat(cmd, " -- ");
strcat(cmd, "./");
strcat(cmd, repo.cdup);
strcat(cmd, "/");
strcat(cmd, view->env->file);
//mvwprintw(view->preview, 0, 0, "%s", cmd);
FILE *fp = popen(cmd, "r");
if (!fp)
{
mvwprintw(view->preview, 0, 0, "error!");
}
size_t lineno = 0;
char linebuf[2048];
for (int i = 0; i < 7 && fgets(linebuf, sizeof(linebuf), fp) != NULL; i++); //get rid of header
while (lineno < view->height && fgets(linebuf, sizeof(linebuf), fp) != NULL) {
enum line_type type;
if (strncmp(linebuf, "@@", 2) == 0)
{
type = LINE_DIFF_CHUNK;
}
else if (strncmp(linebuf, "+", 1) == 0)
{
type = LINE_DIFF_ADD;
}
else if (strncmp(linebuf, "-", 1) == 0)
{
type = LINE_DIFF_DEL;
}
else
{
type = LINE_DEFAULT;
}
(void) wattrset(view->preview, get_view_attr(view, type));
wchgat(view->preview, -1, 0, get_view_color(view, type), NULL);
//(void) wattron(view->preview, get_view_attr(view, type));
mvwprintw(view->preview, lineno, 0, "%s\n", linebuf);
lineno += 1;
}
//struct box *box = line->data;
//mvwprintw(view->preview, 0, 0, "[%s]", box->text);
//io_exec(&view->io, IO_RD, view->dir, NULL, const char *argv[], int custom)
wnoutrefresh(view->preview);
}
else
{
if (view->show_preview)
{
view->show_preview = false;
resize_display();
redraw_view(view);
}
}
}
//might not need this
//else if (view->show_preview)
//{
// view->show_preview = false;
// resize_display();
// redraw_view(view);
//}
unsigned int view_lines, lines;
int update_increment = view_has_flags(view, VIEW_LOG_LIKE | VIEW_GREP_LIKE)
? 100
: view_has_flags(view, VIEW_DIFF_LIKE) ? 10 : 1;
assert(view_is_displayed(view));
if (view == display[current_view])
wbkgdset(window, get_view_attr(view, LINE_TITLE_FOCUS));
else
wbkgdset(window, get_view_attr(view, LINE_TITLE_BLUR));
werase(window);
mvwprintw(window, 0, 0, "[%s]", view->name);
if (*view->ref) {
wprintw(window, " %s", view->ref);
}
if (!view_has_flags(view, VIEW_CUSTOM_STATUS) && view_has_line(view, line) &&
line->lineno) {
wprintw(window, " - %s %u of %zu",
view->ops->type,
line->lineno,
MAX(line->lineno,
view->pipe
? update_increment *
(size_t) ((view->lines - view->custom_lines) / update_increment)
: view->lines - view->custom_lines));
}
if (view->pipe) {
long long secs = (long long) difftime(time(NULL), view->start_time);
/* Three git seconds are a long time ... */
if (secs > 2)
wprintw(window, " loading %llds", secs);
}
view_lines = view->pos.offset + view->height;
lines = view->lines ? MIN(view_lines, view->lines) * 100 / view->lines : 0;
mvwprintw(window, 0, view->width - count_digits(lines) - 1, "%u%%", lines);
wnoutrefresh(window);
}
/*
* View opening
*/
void
split_view(struct view *prev, struct view *view)
{
int height, width;
bool vsplit;
int nviews = displayed_views();
getmaxyx(stdscr, height, width);
vsplit = vertical_split_is_enabled(opt_vertical_split, height, width);
display[1] = view;
current_view = opt_focus_child ? 1 : 0;
view->parent = prev;
resize_display();
if (prev->pos.lineno - prev->pos.offset >= prev->height) {
/* Take the title line into account. */
int lines = prev->pos.lineno - prev->pos.offset - prev->height + 1;
/* Scroll the view that was split if the current line is
* outside the new limited view. */
do_scroll_view(prev, lines);
}
if (view != prev && view_is_displayed(prev)) {
/* "Blur" the previous view. */
update_view_title(prev);
}
if (view_has_flags(prev, VIEW_FLEX_WIDTH) && vsplit && nviews == 1)
reload_view(prev);
}
void
maximize_view(struct view *view, bool redraw)
{
int height, width;
bool vsplit;
int nviews = displayed_views();
getmaxyx(stdscr, height, width);
vsplit = vertical_split_is_enabled(opt_vertical_split, height, width);
memset(display, 0, sizeof(display));
current_view = 0;
display[current_view] = view;
resize_display();
if (redraw) {
redraw_display(false);
report_clear();
}
if (view_has_flags(view, VIEW_FLEX_WIDTH) && vsplit && nviews > 1)
reload_view(view);
}
void
load_view(struct view *view, struct view *prev, enum open_flags flags)
{
bool refresh = !view_no_refresh(view, flags);
/* When prev == view it means this is the first loaded view. */
if (prev && view != prev) {
view->prev = prev;
}
if (!refresh && view_can_refresh(view) &&
watch_update_single(&view->watch, WATCH_EVENT_SWITCH_VIEW)) {
refresh = watch_dirty(&view->watch);
if (refresh)
flags |= OPEN_REFRESH;
}
if (refresh) {
enum status_code code;
if (view->pipe)
end_update(view, true);
if (view->ops->private_size) {
if (!view->private) {
view->private = calloc(1, view->ops->private_size);
} else {
if (view->ops->done)
view->ops->done(view);
memset(view->private, 0, view->ops->private_size);
}
}
code = view->ops->open(view, flags);
if (code != SUCCESS) {
report("%s", get_status_message(code));