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#include "owl.h"
#define BOTTOM_OFFSET 1
static void owl_viewwin_redraw_content(owl_window *w, WINDOW *curswin, void *user_data);
static void owl_viewwin_redraw_status(owl_window *w, WINDOW *curswin, void *user_data);
static void owl_viewwin_layout(owl_viewwin *v);
static void owl_viewwin_set_window(owl_viewwin *v, owl_window *w);
/* Create a viewwin. 'win' is an already initialized owl_window that
* will be used by the viewwin
*/
CALLER_OWN owl_viewwin *owl_viewwin_new_text(owl_window *win, const char *text)
{
owl_viewwin *v = g_slice_new0(owl_viewwin);
owl_fmtext_init_null(&(v->fmtext));
if (text) {
owl_fmtext_append_normal(&(v->fmtext), text);
if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
owl_fmtext_append_normal(&(v->fmtext), "\n");
}
v->textlines=owl_fmtext_num_lines(&(v->fmtext));
}
v->topline=0;
v->rightshift=0;
v->onclose_hook = NULL;
owl_viewwin_set_window(v, win);
return v;
}
/* Create a viewwin. 'win' is an already initialized owl_window that
* will be used by the viewwin
*/
CALLER_OWN owl_viewwin *owl_viewwin_new_fmtext(owl_window *win, const owl_fmtext *fmtext)
{
char *text;
owl_viewwin *v = g_slice_new0(owl_viewwin);
owl_fmtext_copy(&(v->fmtext), fmtext);
text = owl_fmtext_print_plain(fmtext);
if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
owl_fmtext_append_normal(&(v->fmtext), "\n");
}
g_free(text);
v->textlines=owl_fmtext_num_lines(&(v->fmtext));
v->topline=0;
v->rightshift=0;
owl_viewwin_set_window(v, win);
return v;
}
static void owl_viewwin_set_window(owl_viewwin *v, owl_window *w)
{
v->window = g_object_ref(w);
v->content = owl_window_new(v->window);
v->status = owl_window_new(v->window);
v->cmdwin = NULL;
v->sig_content_redraw_id =
g_signal_connect(v->content, "redraw", G_CALLBACK(owl_viewwin_redraw_content), v);
v->sig_status_redraw_id =
g_signal_connect(v->status, "redraw", G_CALLBACK(owl_viewwin_redraw_status), v);
v->sig_resize_id =
g_signal_connect_swapped(v->window, "resized", G_CALLBACK(owl_viewwin_layout), v);
owl_viewwin_layout(v);
owl_window_show(v->content);
owl_window_show(v->status);
}
void owl_viewwin_set_onclose_hook(owl_viewwin *v, void (*onclose_hook) (owl_viewwin *vwin, void *data), void *onclose_hook_data) {
v->onclose_hook = onclose_hook;
v->onclose_hook_data = onclose_hook_data;
}
static void owl_viewwin_layout(owl_viewwin *v)
{
int lines, cols;
owl_window_get_position(v->window, &lines, &cols, NULL, NULL);
owl_window_set_position(v->content, lines - BOTTOM_OFFSET, cols, 0, 0);
/* Only one of these will be visible at a time: */
owl_window_set_position(v->status, BOTTOM_OFFSET, cols, lines - BOTTOM_OFFSET, 0);
if (v->cmdwin)
owl_window_set_position(v->cmdwin, BOTTOM_OFFSET, cols, lines - BOTTOM_OFFSET, 0);
}
/* regenerate text on the curses window. */
static void owl_viewwin_redraw_content(owl_window *w, WINDOW *curswin, void *user_data)
{
owl_fmtext fm1, fm2;
owl_viewwin *v = user_data;
int winlines, wincols;
owl_window_get_position(w, &winlines, &wincols, 0, 0);
werase(curswin);
wmove(curswin, 0, 0);
owl_fmtext_init_null(&fm1);
owl_fmtext_init_null(&fm2);
owl_fmtext_truncate_lines(&(v->fmtext), v->topline, winlines, &fm1);
owl_fmtext_truncate_cols(&fm1, v->rightshift, wincols-1+v->rightshift, &fm2);
owl_fmtext_curs_waddstr(&fm2, curswin, OWL_FMTEXT_ATTR_NONE, OWL_COLOR_DEFAULT, OWL_COLOR_DEFAULT);
owl_fmtext_cleanup(&fm1);
owl_fmtext_cleanup(&fm2);
}
static void owl_viewwin_redraw_status(owl_window *w, WINDOW *curswin, void *user_data)
{
owl_viewwin *v = user_data;
int winlines, wincols;
owl_window_get_position(v->content, &winlines, &wincols, 0, 0);
werase(curswin);
wmove(curswin, 0, 0);
wattrset(curswin, A_REVERSE);
if (v->textlines - v->topline > winlines) {
waddstr(curswin, "--More-- (Space to see more, 'q' to quit)");
} else {
waddstr(curswin, "--End-- (Press 'q' to quit)");
}
wattroff(curswin, A_REVERSE);
}
char *owl_viewwin_command_search(owl_viewwin *v, int argc, const char *const *argv, const char *buff)
{
int direction, consider_current;
const char *buffstart;
direction=OWL_DIRECTION_DOWNWARDS;
buffstart=skiptokens(buff, 1);
if (argc>1 && !strcmp(argv[1], "-r")) {
direction=OWL_DIRECTION_UPWARDS;
buffstart=skiptokens(buff, 2);
}
if (argc==1 || (argc==2 && !strcmp(argv[1], "-r"))) {
consider_current = false;
} else {
owl_function_set_search(buffstart);
consider_current = true;
}
if (!owl_viewwin_search(v, owl_global_get_search_re(&g), consider_current, direction))
owl_function_makemsg("No more matches");
return NULL;
}
typedef struct _owl_viewwin_search_data { /*noproto*/
owl_viewwin *v;
int direction;
} owl_viewwin_search_data;
static void owl_viewwin_callback_search(owl_editwin *e, bool success)
{
if (!success) return;
int consider_current = false;
const char *line = owl_editwin_get_text(e);
owl_viewwin_search_data *data = owl_editwin_get_cbdata(e);
/* Given an empty string, just continue the current search. */
if (line && *line) {
owl_function_set_search(line);
consider_current = true;
}
if (!owl_viewwin_search(data->v, owl_global_get_search_re(&g),
consider_current, data->direction))
owl_function_makemsg("No matches");
}
char *owl_viewwin_command_start_search(owl_viewwin *v, int argc, const char *const *argv, const char *buff)
{
int direction;
const char *buffstart;
owl_editwin *tw;
owl_context *ctx;
owl_viewwin_search_data *data;
direction=OWL_DIRECTION_DOWNWARDS;
buffstart=skiptokens(buff, 1);
if (argc>1 && !strcmp(argv[1], "-r")) {
direction=OWL_DIRECTION_UPWARDS;
buffstart=skiptokens(buff, 2);
}
/* TODO: Add a search history? */
tw = owl_viewwin_set_typwin_active(v, NULL);
owl_editwin_set_locktext(tw, (direction == OWL_DIRECTION_DOWNWARDS) ? "/" : "?");
owl_editwin_insert_string(tw, buffstart);
data = g_new(owl_viewwin_search_data, 1);
data->v = v;
data->direction = direction;
ctx = owl_editcontext_new(OWL_CTX_EDITLINE, tw, "editline",
owl_viewwin_deactivate_editcontext, v);
ctx->cbdata = v;
owl_global_push_context_obj(&g, ctx);
owl_editwin_set_callback(tw, owl_viewwin_callback_search);
owl_editwin_set_cbdata(tw, data, g_free);
/* We aren't saving tw, so release the reference we were given. */
owl_editwin_unref(tw);
return NULL;
}
char *owl_viewwin_start_command(owl_viewwin *v, int argc, const char *const *argv, const char *buff)
{
owl_editwin *tw;
owl_context *ctx;
buff = skiptokens(buff, 1);
tw = owl_viewwin_set_typwin_active(v, owl_global_get_cmd_history(&g));
owl_editwin_set_locktext(tw, ":");
owl_editwin_insert_string(tw, buff);
ctx = owl_editcontext_new(OWL_CTX_EDITLINE, tw, "editline",
owl_viewwin_deactivate_editcontext, v);
owl_global_push_context_obj(&g, ctx);
owl_editwin_set_callback(tw, owl_callback_command);
/* We aren't saving tw, so release the reference we were given. */
owl_editwin_unref(tw);
return NULL;
}
void owl_viewwin_deactivate_editcontext(owl_context *ctx) {
owl_viewwin *v = ctx->cbdata;
owl_viewwin_set_typwin_inactive(v);
}
CALLER_OWN owl_editwin *owl_viewwin_set_typwin_active(owl_viewwin *v, owl_history *hist) {
int lines, cols;
owl_editwin *cmdline;
if (v->cmdwin)
return NULL;
/* Create the command line. */
v->cmdwin = owl_window_new(v->window);
owl_viewwin_layout(v);
owl_window_get_position(v->cmdwin, &lines, &cols, NULL, NULL);
cmdline = owl_editwin_new(v->cmdwin, lines, cols, OWL_EDITWIN_STYLE_ONELINE, hist);
/* Swap out the bottom window. */
owl_window_hide(v->status);
owl_window_show(v->cmdwin);
return cmdline;
}
void owl_viewwin_set_typwin_inactive(owl_viewwin *v) {
if (v->cmdwin) {
/* Swap out the bottom window. */
owl_window_hide(v->cmdwin);
owl_window_show(v->status);
/* Destroy the window itself. */
owl_window_unlink(v->cmdwin);
g_object_unref(v->cmdwin);
v->cmdwin = NULL;
}
}
void owl_viewwin_append_text(owl_viewwin *v, const char *text) {
owl_fmtext_append_normal(&(v->fmtext), text);
v->textlines=owl_fmtext_num_lines(&(v->fmtext));
owl_viewwin_dirty(v);
}
/* Schedule a redraw of 'v'. Exported for hooking into the search
string; when we have some way of listening for changes, this can be
removed. */
void owl_viewwin_dirty(owl_viewwin *v)
{
owl_window_dirty(v->content);
owl_window_dirty(v->status);
}
void owl_viewwin_down(owl_viewwin *v, int amount) {
int winlines;
owl_window_get_position(v->content, &winlines, 0, 0, 0);
/* Don't scroll past the bottom. */
amount = MIN(amount, v->textlines - (v->topline + winlines));
/* But if we're already past the bottom, don't back up either. */
if (amount > 0) {
v->topline += amount;
owl_viewwin_dirty(v);
}
}
void owl_viewwin_up(owl_viewwin *v, int amount)
{
v->topline -= amount;
if (v->topline<0) v->topline=0;
owl_viewwin_dirty(v);
}
void owl_viewwin_pagedown(owl_viewwin *v)
{
int winlines;
owl_window_get_position(v->content, &winlines, 0, 0, 0);
owl_viewwin_down(v, winlines);
}
void owl_viewwin_linedown(owl_viewwin *v)
{
owl_viewwin_down(v, 1);
}
void owl_viewwin_pageup(owl_viewwin *v)
{
int winlines;
owl_window_get_position(v->content, &winlines, 0, 0, 0);
owl_viewwin_up(v, winlines);
}
void owl_viewwin_lineup(owl_viewwin *v)
{
owl_viewwin_up(v, 1);
}
void owl_viewwin_right(owl_viewwin *v, int n)
{
v->rightshift+=n;
owl_viewwin_dirty(v);
}
void owl_viewwin_left(owl_viewwin *v, int n)
{
v->rightshift-=n;
if (v->rightshift<0) v->rightshift=0;
owl_viewwin_dirty(v);
}
void owl_viewwin_top(owl_viewwin *v)
{
v->topline=0;
v->rightshift=0;
owl_viewwin_dirty(v);
}
void owl_viewwin_bottom(owl_viewwin *v)
{
int winlines;
owl_window_get_position(v->content, &winlines, 0, 0, 0);
v->topline = v->textlines - winlines;
owl_viewwin_dirty(v);
}
/* This is a bit of a hack, because regexec doesn't have an 'n'
* version. */
static int _re_memcompare(const owl_regex *re, const char *string, int start, int end)
{
int ans;
char *tmp = g_strndup(string + start, end - start);
ans = owl_regex_compare(re, tmp, NULL, NULL);
g_free(tmp);
return !ans;
}
/* Scroll in 'direction' to the next line containing 're' in 'v',
* starting from the current line. Returns 0 if no occurrence is
* found.
*
* If consider_current is true then stay on the current line
* if it matches.
*/
int owl_viewwin_search(owl_viewwin *v, const owl_regex *re, int consider_current, int direction)
{
int start, end, offset;
int lineend, linestart;
const char *buf, *linestartp;
owl_fmtext_line_extents(&v->fmtext, v->topline, &start, &end);
if (direction == OWL_DIRECTION_DOWNWARDS) {
offset = owl_fmtext_search(&v->fmtext, re,
consider_current ? start : end);
if (offset < 0)
return 0;
v->topline = owl_fmtext_line_number(&v->fmtext, offset);
owl_viewwin_dirty(v);
return 1;
} else {
/* TODO: This is a hack. Really, we should have an owl_fmlines or
* something containing an array of owl_fmtext split into
* lines. Also, it cannot handle multi-line regex, if we ever care about
* them. */
buf = owl_fmtext_get_text(&v->fmtext);
lineend = consider_current ? end : start;
while (lineend > 0) {
linestartp = memrchr(buf, '\n', lineend - 1);
linestart = linestartp ? linestartp - buf + 1 : 0;
if (_re_memcompare(re, buf, linestart, lineend)) {
v->topline = owl_fmtext_line_number(&v->fmtext, linestart);
owl_viewwin_dirty(v);
return 1;
}
lineend = linestart;
}
return 0;
}
}
void owl_viewwin_delete(owl_viewwin *v)
{
if (v->onclose_hook) {
v->onclose_hook(v, v->onclose_hook_data);
v->onclose_hook = NULL;
v->onclose_hook_data = NULL;
}
owl_viewwin_set_typwin_inactive(v);
/* TODO: This is far too tedious. owl_viewwin should own v->window
* and just unlink it in one go. Signals should also go away for
* free. */
g_signal_handler_disconnect(v->window, v->sig_resize_id);
g_signal_handler_disconnect(v->content, v->sig_content_redraw_id);
g_signal_handler_disconnect(v->status, v->sig_status_redraw_id);
owl_window_unlink(v->content);
owl_window_unlink(v->status);
g_object_unref(v->window);
g_object_unref(v->content);
g_object_unref(v->status);
owl_fmtext_cleanup(&(v->fmtext));
g_slice_free(owl_viewwin, v);
}
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