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view.c
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/* Copyright (c) 2006-2015 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"
/*
* 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);
}
view->has_scrolled = true;
report_clear();
}
/* Scroll frontend */
void
scroll_view(struct view *view, enum request request)
{
int lines = 1;
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:
lines = view->height;
case REQ_SCROLL_WHEEL_DOWN:
case REQ_SCROLL_LINE_DOWN:
if (view->pos.offset + lines > view->lines)
lines = view->lines - view->pos.offset;
if (lines == 0 || view->pos.offset + view->height >= view->lines) {
report("Cannot scroll beyond the last line");
return;
}
break;
case REQ_SCROLL_PAGE_UP:
lines = view->height;
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");
return;
}
lines = -lines;
break;
default:
die("request %d not handled in switch", request);
}
do_scroll_view(view, lines);
}
/* 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 = opt_mouse_scroll;
break;
case REQ_MOVE_WHEEL_UP:
steps = -opt_mouse_scroll;
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 *rev = argv_format_arg(view->env, expr);
const char *rev_parse_argv[] = {
"git", "rev-parse", "--revs-only", rev, NULL
};
bool ok = rev && io_run_buf(rev_parse_argv, id, sizeof(id), 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 NULL;
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));
}
bool
view_exec(struct view *view, enum open_flags flags)
{
char opt_env_lines[64] = "";
char opt_env_columns[64] = "";
char * const opt_env[] = { opt_env_lines, opt_env_columns, NULL };
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;
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_env_columns, "COLUMNS=%d", MAX(0, width));
string_format(opt_env_lines, "LINES=%d", height);
return io_exec(&view->io, IO_RD, view->dir, opt_env, view->argv, io_flags);
}
enum status_code
begin_update(struct view *view, const char *dir, const char **argv, enum open_flags flags)
{
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) {
bool file_filter = !view_has_flags(view, VIEW_FILE_FILTER) || opt_file_filter;
view->dir = dir;
if (!argv_format(view->env, &view->argv, argv, !view->prev, file_filter))
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");
end_update(view, true);
return false;
}
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);
return true;
}
void
update_view_title(struct view *view)
{
WINDOW *window = view->title;
struct line *line = &view->line[view->pos.lineno];
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 %d of %zd",
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) {
time_t secs = time(NULL) - view->start_time;
/* Three git seconds are a long time ... */
if (secs > 2)
wprintw(window, " loading %lds", 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, "%d%%", lines);
wnoutrefresh(window);
}
/*
* View opening
*/
void
split_view(struct view *prev, struct view *view)
{
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))
load_view(prev, NULL, OPEN_RELOAD);
}
void
maximize_view(struct view *view, bool redraw)
{
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))
load_view(view, NULL, OPEN_RELOAD);
}
}
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));
return;
}
}
if (prev) {
bool split = !!(flags & OPEN_SPLIT);
if (split) {
split_view(prev, view);
} else {
maximize_view(view, false);
}
}
restore_view_position(view);
if (view->pipe && view->lines == 0) {
/* Clear the old view and let the incremental updating refill
* the screen. */
werase(view->win);
/* Do not clear the position if it is the first view. */
if (view->prev && !(flags & (OPEN_RELOAD | OPEN_REFRESH)))
clear_position(&view->prev_pos);
report_clear();
} else if (view_is_displayed(view)) {
redraw_view(view);
report_clear();
}
}
#define refresh_view(view) load_view(view, NULL, OPEN_REFRESH)
#define reload_view(view) load_view(view, NULL, OPEN_RELOAD)
void
open_view(struct view *prev, struct view *view, enum open_flags flags)
{
bool reload = !!(flags & (OPEN_RELOAD | OPEN_PREPARED));
int nviews = displayed_views();
assert(flags ^ OPEN_REFRESH);
if (view == prev && nviews == 1 && !reload) {
report("Already in %s view", view->name);
return;
}
if (!view_has_flags(view, VIEW_NO_GIT_DIR) && !repo.git_dir[0]) {
report("The %s view is disabled in pager mode", view->name);
return;
}
if (!view->keymap)
view->keymap = get_keymap(view->name, strlen(view->name));
load_view(view, prev ? prev : view, flags);
}
void
open_argv(struct view *prev, struct view *view, const char *argv[], const char *dir, enum open_flags flags)
{
if (view->pipe)
end_update(view, true);
view->dir = dir;
if (!argv_copy(&view->argv, argv)) {
report("Failed to open %s view: %s", view->name, io_strerror(&view->io));
} else {
open_view(prev, view, flags | OPEN_PREPARED);
}
}
/*
* Various utilities.
*/
static struct view *sorting_view;
#define apply_comparator(cmp, o1, o2) \
(!(o1) || !(o2)) ? !!(o2) - !!(o1) : cmp(o1, o2)
#define number_compare(size1, size2) (*(size1) - *(size2))
#define mode_is_dir(mode) ((mode) && S_ISDIR(*(mode)))
static int
compare_view_column(enum view_column_type column, bool use_file_mode,
const struct line *line1, struct view_column_data *column_data1,
const struct line *line2, struct view_column_data *column_data2)
{
switch (column) {
case VIEW_COLUMN_AUTHOR:
return apply_comparator(ident_compare, column_data1->author, column_data2->author);
case VIEW_COLUMN_DATE:
return apply_comparator(timecmp, column_data1->date, column_data2->date);
case VIEW_COLUMN_ID:
if (column_data1->reflog && column_data2->reflog)
return apply_comparator(strcmp, column_data1->reflog, column_data2->reflog);
return apply_comparator(strcmp, column_data1->id, column_data2->id);
case VIEW_COLUMN_FILE_NAME:
if (use_file_mode && mode_is_dir(column_data1->mode) != mode_is_dir(column_data2->mode))
return mode_is_dir(column_data1->mode) ? -1 : 1;
return apply_comparator(strcmp, column_data1->file_name, column_data2->file_name);
case VIEW_COLUMN_FILE_SIZE:
return apply_comparator(number_compare, column_data1->file_size, column_data2->file_size);
case VIEW_COLUMN_LINE_NUMBER:
return line1->lineno - line2->lineno;
case VIEW_COLUMN_MODE:
return apply_comparator(number_compare, column_data1->mode, column_data2->mode);
case VIEW_COLUMN_REF:
return apply_comparator(ref_compare, column_data1->ref, column_data2->ref);
case VIEW_COLUMN_COMMIT_TITLE:
return apply_comparator(strcmp, column_data1->commit_title, column_data2->commit_title);
case VIEW_COLUMN_SECTION:
return apply_comparator(strcmp, column_data1->section->opt.section.text,
column_data2->section->opt.section.text);
case VIEW_COLUMN_STATUS:
return apply_comparator(number_compare, column_data1->status, column_data2->status);
case VIEW_COLUMN_TEXT:
if (column_data1->box && column_data2->box)
return apply_comparator(strcmp, column_data1->box->text,
column_data2->box->text);
return apply_comparator(strcmp, column_data1->text, column_data2->text);
}
return 0;
}
static enum view_column_type view_column_order[] = {
VIEW_COLUMN_FILE_NAME,
VIEW_COLUMN_STATUS,
VIEW_COLUMN_MODE,
VIEW_COLUMN_FILE_SIZE,
VIEW_COLUMN_DATE,
VIEW_COLUMN_AUTHOR,
VIEW_COLUMN_COMMIT_TITLE,
VIEW_COLUMN_LINE_NUMBER,
VIEW_COLUMN_SECTION,
VIEW_COLUMN_TEXT,
VIEW_COLUMN_REF,
VIEW_COLUMN_ID,
};
static int
sort_view_compare(const void *l1, const void *l2)
{
const struct line *line1 = l1;
const struct line *line2 = l2;
struct view_column_data column_data1 = {0};
struct view_column_data column_data2 = {0};
struct sort_state *sort = &sorting_view->sort;
enum view_column_type column = get_sort_field(sorting_view);
int cmp;
int i;
if (!sorting_view->ops->get_column_data(sorting_view, line1, &column_data1))
return -1;
else if (!sorting_view->ops->get_column_data(sorting_view, line2, &column_data2))
return 1;
cmp = compare_view_column(column, true, line1, &column_data1, line2, &column_data2);
/* Ensure stable sorting by ordering by the other
* columns if the selected column values are equal. */
for (i = 0; !cmp && i < ARRAY_SIZE(view_column_order); i++)
if (column != view_column_order[i])
cmp = compare_view_column(view_column_order[i], false,
line1, &column_data1,
line2, &column_data2);
return sort->reverse ? -cmp : cmp;
}
void
resort_view(struct view *view, bool renumber)
{
sorting_view = view;
qsort(view->line, view->lines, sizeof(*view->line), sort_view_compare);
if (renumber) {
size_t i, lineno;
for (i = 0, lineno = 1; i < view->lines; i++)
if (view->line[i].lineno)
view->line[i].lineno = lineno++;
}
}
void
sort_view(struct view *view, bool change_field)
{
struct sort_state *state = &view->sort;
if (change_field) {
while (true) {
state->current = state->current->next
? state->current->next : view->columns;
if (get_sort_field(view) == VIEW_COLUMN_ID &&
!state->current->opt.id.display)
continue;
break;
}
} else {
state->reverse = !state->reverse;
}
resort_view(view, false);
}
static const char *
view_column_text(struct view *view, struct view_column_data *column_data,
struct view_column *column)
{
const char *text = "";
switch (column->type) {
case VIEW_COLUMN_AUTHOR:
if (column_data->author)