Adding upstream version 3.3a.upstream/3.3aupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1208 insertions, 0 deletions

diff --git a/mode-tree.c b/mode-tree.c
new file mode 100644
index 0000000..c007e27
--- /dev/null
+++ b/mode-tree.c
@@ -0,0 +1,1208 @@
+/* $OpenBSD$ */
+
+/*
+ * Copyright (c) 2017 Nicholas Marriott <nicholas.marriott@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "tmux.h"
+
+struct mode_tree_item;
+TAILQ_HEAD(mode_tree_list, mode_tree_item);
+
+struct mode_tree_data {
+	int			  dead;
+	u_int			  references;
+	int			  zoomed;
+
+	struct window_pane	 *wp;
+	void			 *modedata;
+	const struct menu_item	 *menu;
+
+	const char		**sort_list;
+	u_int			  sort_size;
+	struct mode_tree_sort_criteria sort_crit;
+
+	mode_tree_build_cb        buildcb;
+	mode_tree_draw_cb         drawcb;
+	mode_tree_search_cb       searchcb;
+	mode_tree_menu_cb         menucb;
+	mode_tree_height_cb       heightcb;
+	mode_tree_key_cb	  keycb;
+
+	struct mode_tree_list	  children;
+	struct mode_tree_list	  saved;
+
+	struct mode_tree_line	 *line_list;
+	u_int			  line_size;
+
+	u_int			  depth;
+
+	u_int			  width;
+	u_int			  height;
+
+	u_int			  offset;
+	u_int			  current;
+
+	struct screen		  screen;
+
+	int			  preview;
+	char			 *search;
+	char			 *filter;
+	int			  no_matches;
+};
+
+struct mode_tree_item {
+	struct mode_tree_item		*parent;
+	void				*itemdata;
+	u_int				 line;
+
+	key_code			 key;
+	const char			*keystr;
+	size_t				 keylen;
+
+	uint64_t			 tag;
+	const char			*name;
+	const char			*text;
+
+	int				 expanded;
+	int				 tagged;
+
+	int				 draw_as_parent;
+	int				 no_tag;
+
+	struct mode_tree_list		 children;
+	TAILQ_ENTRY(mode_tree_item)	 entry;
+};
+
+struct mode_tree_line {
+	struct mode_tree_item		*item;
+	u_int				 depth;
+	int				 last;
+	int				 flat;
+};
+
+struct mode_tree_menu {
+	struct mode_tree_data		*data;
+	struct client			*c;
+	u_int				 line;
+};
+
+static void mode_tree_free_items(struct mode_tree_list *);
+
+static const struct menu_item mode_tree_menu_items[] = {
+	{ "Scroll Left", '<', NULL },
+	{ "Scroll Right", '>', NULL },
+	{ "", KEYC_NONE, NULL },
+	{ "Cancel", 'q', NULL },
+
+	{ NULL, KEYC_NONE, NULL }
+};
+
+static struct mode_tree_item *
+mode_tree_find_item(struct mode_tree_list *mtl, uint64_t tag)
+{
+	struct mode_tree_item	*mti, *child;
+
+	TAILQ_FOREACH(mti, mtl, entry) {
+		if (mti->tag == tag)
+			return (mti);
+		child = mode_tree_find_item(&mti->children, tag);
+		if (child != NULL)
+			return (child);
+	}
+	return (NULL);
+}
+
+static void
+mode_tree_free_item(struct mode_tree_item *mti)
+{
+	mode_tree_free_items(&mti->children);
+
+	free((void *)mti->name);
+	free((void *)mti->text);
+	free((void *)mti->keystr);
+
+	free(mti);
+}
+
+static void
+mode_tree_free_items(struct mode_tree_list *mtl)
+{
+	struct mode_tree_item	*mti, *mti1;
+
+	TAILQ_FOREACH_SAFE(mti, mtl, entry, mti1) {
+		TAILQ_REMOVE(mtl, mti, entry);
+		mode_tree_free_item(mti);
+	}
+}
+
+static void
+mode_tree_check_selected(struct mode_tree_data *mtd)
+{
+	/*
+	 * If the current line would now be off screen reset the offset to the
+	 * last visible line.
+	 */
+	if (mtd->current > mtd->height - 1)
+		mtd->offset = mtd->current - mtd->height + 1;
+}
+
+static void
+mode_tree_clear_lines(struct mode_tree_data *mtd)
+{
+	free(mtd->line_list);
+	mtd->line_list = NULL;
+	mtd->line_size = 0;
+}
+
+static void
+mode_tree_build_lines(struct mode_tree_data *mtd,
+    struct mode_tree_list *mtl, u_int depth)
+{
+	struct mode_tree_item	*mti;
+	struct mode_tree_line	*line;
+	u_int			 i;
+	int			 flat = 1;
+
+	mtd->depth = depth;
+	TAILQ_FOREACH(mti, mtl, entry) {
+		mtd->line_list = xreallocarray(mtd->line_list,
+		    mtd->line_size + 1, sizeof *mtd->line_list);
+
+		line = &mtd->line_list[mtd->line_size++];
+		line->item = mti;
+		line->depth = depth;
+		line->last = (mti == TAILQ_LAST(mtl, mode_tree_list));
+
+		mti->line = (mtd->line_size - 1);
+		if (!TAILQ_EMPTY(&mti->children))
+			flat = 0;
+		if (mti->expanded)
+			mode_tree_build_lines(mtd, &mti->children, depth + 1);
+
+		if (mtd->keycb != NULL) {
+			mti->key = mtd->keycb(mtd->modedata, mti->itemdata,
+			    mti->line);
+			if (mti->key == KEYC_UNKNOWN)
+				mti->key = KEYC_NONE;
+		} else if (mti->line < 10)
+			mti->key = '0' + mti->line;
+		else if (mti->line < 36)
+			mti->key = KEYC_META|('a' + mti->line - 10);
+		else
+			mti->key = KEYC_NONE;
+		if (mti->key != KEYC_NONE) {
+			mti->keystr = xstrdup(key_string_lookup_key(mti->key,
+			    0));
+			mti->keylen = strlen(mti->keystr);
+		} else {
+			mti->keystr = NULL;
+			mti->keylen = 0;
+		}
+	}
+	TAILQ_FOREACH(mti, mtl, entry) {
+		for (i = 0; i < mtd->line_size; i++) {
+			line = &mtd->line_list[i];
+			if (line->item == mti)
+				line->flat = flat;
+		}
+	}
+}
+
+static void
+mode_tree_clear_tagged(struct mode_tree_list *mtl)
+{
+	struct mode_tree_item	*mti;
+
+	TAILQ_FOREACH(mti, mtl, entry) {
+		mti->tagged = 0;
+		mode_tree_clear_tagged(&mti->children);
+	}
+}
+
+void
+mode_tree_up(struct mode_tree_data *mtd, int wrap)
+{
+	if (mtd->current == 0) {
+		if (wrap) {
+			mtd->current = mtd->line_size - 1;
+			if (mtd->line_size >= mtd->height)
+				mtd->offset = mtd->line_size - mtd->height;
+		}
+	} else {
+		mtd->current--;
+		if (mtd->current < mtd->offset)
+			mtd->offset--;
+	}
+}
+
+void
+mode_tree_down(struct mode_tree_data *mtd, int wrap)
+{
+	if (mtd->current == mtd->line_size - 1) {
+		if (wrap) {
+			mtd->current = 0;
+			mtd->offset = 0;
+		}
+	} else {
+		mtd->current++;
+		if (mtd->current > mtd->offset + mtd->height - 1)
+			mtd->offset++;
+	}
+}
+
+void *
+mode_tree_get_current(struct mode_tree_data *mtd)
+{
+	return (mtd->line_list[mtd->current].item->itemdata);
+}
+
+const char *
+mode_tree_get_current_name(struct mode_tree_data *mtd)
+{
+	return (mtd->line_list[mtd->current].item->name);
+}
+
+void
+mode_tree_expand_current(struct mode_tree_data *mtd)
+{
+	if (!mtd->line_list[mtd->current].item->expanded) {
+		mtd->line_list[mtd->current].item->expanded = 1;
+		mode_tree_build(mtd);
+	}
+}
+
+void
+mode_tree_collapse_current(struct mode_tree_data *mtd)
+{
+	if (mtd->line_list[mtd->current].item->expanded) {
+		mtd->line_list[mtd->current].item->expanded = 0;
+		mode_tree_build(mtd);
+	}
+}
+
+static int
+mode_tree_get_tag(struct mode_tree_data *mtd, uint64_t tag, u_int *found)
+{
+	u_int	i;
+
+	for (i = 0; i < mtd->line_size; i++) {
+		if (mtd->line_list[i].item->tag == tag)
+			break;
+	}
+	if (i != mtd->line_size) {
+		*found = i;
+		return (1);
+	}
+	return (0);
+}
+
+void
+mode_tree_expand(struct mode_tree_data *mtd, uint64_t tag)
+{
+	u_int	found;
+
+	if (!mode_tree_get_tag(mtd, tag, &found))
+	    return;
+	if (!mtd->line_list[found].item->expanded) {
+		mtd->line_list[found].item->expanded = 1;
+		mode_tree_build(mtd);
+	}
+}
+
+int
+mode_tree_set_current(struct mode_tree_data *mtd, uint64_t tag)
+{
+	u_int	found;
+
+	if (mode_tree_get_tag(mtd, tag, &found)) {
+		mtd->current = found;
+		if (mtd->current > mtd->height - 1)
+			mtd->offset = mtd->current - mtd->height + 1;
+		else
+			mtd->offset = 0;
+		return (1);
+	}
+	mtd->current = 0;
+	mtd->offset = 0;
+	return (0);
+}
+
+u_int
+mode_tree_count_tagged(struct mode_tree_data *mtd)
+{
+	struct mode_tree_item	*mti;
+	u_int			 i, tagged;
+
+	tagged = 0;
+	for (i = 0; i < mtd->line_size; i++) {
+		mti = mtd->line_list[i].item;
+		if (mti->tagged)
+			tagged++;
+	}
+	return (tagged);
+}
+
+void
+mode_tree_each_tagged(struct mode_tree_data *mtd, mode_tree_each_cb cb,
+    struct client *c, key_code key, int current)
+{
+	struct mode_tree_item	*mti;
+	u_int			 i;
+	int			 fired;
+
+	fired = 0;
+	for (i = 0; i < mtd->line_size; i++) {
+		mti = mtd->line_list[i].item;
+		if (mti->tagged) {
+			fired = 1;
+			cb(mtd->modedata, mti->itemdata, c, key);
+		}
+	}
+	if (!fired && current) {
+		mti = mtd->line_list[mtd->current].item;
+		cb(mtd->modedata, mti->itemdata, c, key);
+	}
+}
+
+struct mode_tree_data *
+mode_tree_start(struct window_pane *wp, struct args *args,
+    mode_tree_build_cb buildcb, mode_tree_draw_cb drawcb,
+    mode_tree_search_cb searchcb, mode_tree_menu_cb menucb,
+    mode_tree_height_cb heightcb, mode_tree_key_cb keycb, void *modedata,
+    const struct menu_item *menu, const char **sort_list, u_int sort_size,
+    struct screen **s)
+{
+	struct mode_tree_data	*mtd;
+	const char		*sort;
+	u_int			 i;
+
+	mtd = xcalloc(1, sizeof *mtd);
+	mtd->references = 1;
+
+	mtd->wp = wp;
+	mtd->modedata = modedata;
+	mtd->menu = menu;
+
+	mtd->sort_list = sort_list;
+	mtd->sort_size = sort_size;
+
+	mtd->preview = !args_has(args, 'N');
+
+	sort = args_get(args, 'O');
+	if (sort != NULL) {
+		for (i = 0; i < sort_size; i++) {
+			if (strcasecmp(sort, sort_list[i]) == 0)
+				mtd->sort_crit.field = i;
+		}
+	}
+	mtd->sort_crit.reversed = args_has(args, 'r');
+
+	if (args_has(args, 'f'))
+		mtd->filter = xstrdup(args_get(args, 'f'));
+	else
+		mtd->filter = NULL;
+
+	mtd->buildcb = buildcb;
+	mtd->drawcb = drawcb;
+	mtd->searchcb = searchcb;
+	mtd->menucb = menucb;
+	mtd->heightcb = heightcb;
+	mtd->keycb = keycb;
+
+	TAILQ_INIT(&mtd->children);
+
+	*s = &mtd->screen;
+	screen_init(*s, screen_size_x(&wp->base), screen_size_y(&wp->base), 0);
+	(*s)->mode &= ~MODE_CURSOR;
+
+	return (mtd);
+}
+
+void
+mode_tree_zoom(struct mode_tree_data *mtd, struct args *args)
+{
+	struct window_pane	*wp = mtd->wp;
+
+	if (args_has(args, 'Z')) {
+		mtd->zoomed = (wp->window->flags & WINDOW_ZOOMED);
+		if (!mtd->zoomed && window_zoom(wp) == 0)
+			server_redraw_window(wp->window);
+	} else
+		mtd->zoomed = -1;
+}
+
+static void
+mode_tree_set_height(struct mode_tree_data *mtd)
+{
+	struct screen	*s = &mtd->screen;
+	u_int		 height;
+
+	if (mtd->heightcb != NULL) {
+		height = mtd->heightcb(mtd, screen_size_y(s));
+		if (height < screen_size_y(s))
+		    mtd->height = screen_size_y(s) - height;
+	} else {
+		mtd->height = (screen_size_y(s) / 3) * 2;
+		if (mtd->height > mtd->line_size)
+			mtd->height = screen_size_y(s) / 2;
+	}
+	if (mtd->height < 10)
+		mtd->height = screen_size_y(s);
+	if (screen_size_y(s) - mtd->height < 2)
+		mtd->height = screen_size_y(s);
+}
+
+void
+mode_tree_build(struct mode_tree_data *mtd)
+{
+	struct screen	*s = &mtd->screen;
+	uint64_t	 tag;
+
+	if (mtd->line_list != NULL)
+		tag = mtd->line_list[mtd->current].item->tag;
+	else
+		tag = UINT64_MAX;
+
+	TAILQ_CONCAT(&mtd->saved, &mtd->children, entry);
+	TAILQ_INIT(&mtd->children);
+
+	mtd->buildcb(mtd->modedata, &mtd->sort_crit, &tag, mtd->filter);
+	mtd->no_matches = TAILQ_EMPTY(&mtd->children);
+	if (mtd->no_matches)
+		mtd->buildcb(mtd->modedata, &mtd->sort_crit, &tag, NULL);
+
+	mode_tree_free_items(&mtd->saved);
+	TAILQ_INIT(&mtd->saved);
+
+	mode_tree_clear_lines(mtd);
+	mode_tree_build_lines(mtd, &mtd->children, 0);
+
+	if (tag == UINT64_MAX)
+		tag = mtd->line_list[mtd->current].item->tag;
+	mode_tree_set_current(mtd, tag);
+
+	mtd->width = screen_size_x(s);
+	if (mtd->preview)
+		mode_tree_set_height(mtd);
+	else
+		mtd->height = screen_size_y(s);
+	mode_tree_check_selected(mtd);
+}
+
+static void
+mode_tree_remove_ref(struct mode_tree_data *mtd)
+{
+	if (--mtd->references == 0)
+		free(mtd);
+}
+
+void
+mode_tree_free(struct mode_tree_data *mtd)
+{
+	struct window_pane	*wp = mtd->wp;
+
+	if (mtd->zoomed == 0)
+		server_unzoom_window(wp->window);
+
+	mode_tree_free_items(&mtd->children);
+	mode_tree_clear_lines(mtd);
+	screen_free(&mtd->screen);
+
+	free(mtd->search);
+	free(mtd->filter);
+
+	mtd->dead = 1;
+	mode_tree_remove_ref(mtd);
+}
+
+void
+mode_tree_resize(struct mode_tree_data *mtd, u_int sx, u_int sy)
+{
+	struct screen	*s = &mtd->screen;
+
+	screen_resize(s, sx, sy, 0);
+
+	mode_tree_build(mtd);
+	mode_tree_draw(mtd);
+
+	mtd->wp->flags |= PANE_REDRAW;
+}
+
+struct mode_tree_item *
+mode_tree_add(struct mode_tree_data *mtd, struct mode_tree_item *parent,
+    void *itemdata, uint64_t tag, const char *name, const char *text,
+    int expanded)
+{
+	struct mode_tree_item	*mti, *saved;
+
+	log_debug("%s: %llu, %s %s", __func__, (unsigned long long)tag,
+	    name, (text == NULL ? "" : text));
+
+	mti = xcalloc(1, sizeof *mti);
+	mti->parent = parent;
+	mti->itemdata = itemdata;
+
+	mti->tag = tag;
+	mti->name = xstrdup(name);
+	if (text != NULL)
+		mti->text = xstrdup(text);
+
+	saved = mode_tree_find_item(&mtd->saved, tag);
+	if (saved != NULL) {
+		if (parent == NULL || parent->expanded)
+			mti->tagged = saved->tagged;
+		mti->expanded = saved->expanded;
+	} else if (expanded == -1)
+		mti->expanded = 1;
+	else
+		mti->expanded = expanded;
+
+	TAILQ_INIT(&mti->children);
+
+	if (parent != NULL)
+		TAILQ_INSERT_TAIL(&parent->children, mti, entry);
+	else
+		TAILQ_INSERT_TAIL(&mtd->children, mti, entry);
+
+	return (mti);
+}
+
+void
+mode_tree_draw_as_parent(struct mode_tree_item *mti)
+{
+	mti->draw_as_parent = 1;
+}
+
+void
+mode_tree_no_tag(struct mode_tree_item *mti)
+{
+	mti->no_tag = 1;
+}
+
+void
+mode_tree_remove(struct mode_tree_data *mtd, struct mode_tree_item *mti)
+{
+	struct mode_tree_item	*parent = mti->parent;
+
+	if (parent != NULL)
+		TAILQ_REMOVE(&parent->children, mti, entry);
+	else
+		TAILQ_REMOVE(&mtd->children, mti, entry);
+	mode_tree_free_item(mti);
+}
+
+void
+mode_tree_draw(struct mode_tree_data *mtd)
+{
+	struct window_pane	*wp = mtd->wp;
+	struct screen		*s = &mtd->screen;
+	struct mode_tree_line	*line;
+	struct mode_tree_item	*mti;
+	struct options		*oo = wp->window->options;
+	struct screen_write_ctx	 ctx;
+	struct grid_cell	 gc0, gc;
+	u_int			 w, h, i, j, sy, box_x, box_y, width;
+	char			*text, *start, *key;
+	const char		*tag, *symbol;
+	size_t			 size, n;
+	int			 keylen, pad;
+
+	if (mtd->line_size == 0)
+		return;
+
+	memcpy(&gc0, &grid_default_cell, sizeof gc0);
+	memcpy(&gc, &grid_default_cell, sizeof gc);
+	style_apply(&gc, oo, "mode-style", NULL);
+
+	w = mtd->width;
+	h = mtd->height;
+
+	screen_write_start(&ctx, s);
+	screen_write_clearscreen(&ctx, 8);
+
+	keylen = 0;
+	for (i = 0; i < mtd->line_size; i++) {
+		mti = mtd->line_list[i].item;
+		if (mti->key == KEYC_NONE)
+			continue;
+		if ((int)mti->keylen + 3 > keylen)
+			keylen = mti->keylen + 3;
+	}
+
+	for (i = 0; i < mtd->line_size; i++) {
+		if (i < mtd->offset)
+			continue;
+		if (i > mtd->offset + h - 1)
+			break;
+		line = &mtd->line_list[i];
+		mti = line->item;
+
+		screen_write_cursormove(&ctx, 0, i - mtd->offset, 0);
+
+		pad = keylen - 2 - mti->keylen;
+		if (mti->key != KEYC_NONE)
+			xasprintf(&key, "(%s)%*s", mti->keystr, pad, "");
+		else
+			key = xstrdup("");
+
+		if (line->flat)
+			symbol = "";
+		else if (TAILQ_EMPTY(&mti->children))
+			symbol = "  ";
+		else if (mti->expanded)
+			symbol = "- ";
+		else
+			symbol = "+ ";
+
+		if (line->depth == 0)
+			start = xstrdup(symbol);
+		else {
+			size = (4 * line->depth) + 32;
+
+			start = xcalloc(1, size);
+			for (j = 1; j < line->depth; j++) {
+				if (mti->parent != NULL &&
+				    mtd->line_list[mti->parent->line].last)
+					strlcat(start, "    ", size);
+				else
+					strlcat(start, "\001x\001   ", size);
+			}
+			if (line->last)
+				strlcat(start, "\001mq\001> ", size);
+			else
+				strlcat(start, "\001tq\001> ", size);
+			strlcat(start, symbol, size);
+		}
+
+		if (mti->tagged)
+			tag = "*";
+		else
+			tag = "";
+		xasprintf(&text, "%-*s%s%s%s%s", keylen, key, start, mti->name,
+		    tag, (mti->text != NULL) ? ": " : "" );
+		width = utf8_cstrwidth(text);
+		if (width > w)
+			width = w;
+		free(start);
+
+		if (mti->tagged) {
+			gc.attr ^= GRID_ATTR_BRIGHT;
+			gc0.attr ^= GRID_ATTR_BRIGHT;
+		}
+
+		if (i != mtd->current) {
+			screen_write_clearendofline(&ctx, 8);
+			screen_write_nputs(&ctx, w, &gc0, "%s", text);
+			if (mti->text != NULL) {
+				format_draw(&ctx, &gc0, w - width, mti->text,
+				    NULL, 0);
+			}
+		} else {
+			screen_write_clearendofline(&ctx, gc.bg);
+			screen_write_nputs(&ctx, w, &gc, "%s", text);
+			if (mti->text != NULL) {
+				format_draw(&ctx, &gc, w - width, mti->text,
+				    NULL, 0);
+			}
+		}
+		free(text);
+		free(key);
+
+		if (mti->tagged) {
+			gc.attr ^= GRID_ATTR_BRIGHT;
+			gc0.attr ^= GRID_ATTR_BRIGHT;
+		}
+	}
+
+	sy = screen_size_y(s);
+	if (!mtd->preview || sy <= 4 || h <= 4 || sy - h <= 4 || w <= 4)
+		goto done;
+
+	line = &mtd->line_list[mtd->current];
+	mti = line->item;
+	if (mti->draw_as_parent)
+		mti = mti->parent;
+
+	screen_write_cursormove(&ctx, 0, h, 0);
+	screen_write_box(&ctx, w, sy - h, BOX_LINES_DEFAULT, NULL, NULL);
+
+	if (mtd->sort_list != NULL) {
+		xasprintf(&text, " %s (sort: %s%s)", mti->name,
+		    mtd->sort_list[mtd->sort_crit.field],
+		    mtd->sort_crit.reversed ? ", reversed" : "");
+	} else
+		xasprintf(&text, " %s", mti->name);
+	if (w - 2 >= strlen(text)) {
+		screen_write_cursormove(&ctx, 1, h, 0);
+		screen_write_puts(&ctx, &gc0, "%s", text);
+
+		if (mtd->no_matches)
+			n = (sizeof "no matches") - 1;
+		else
+			n = (sizeof "active") - 1;
+		if (mtd->filter != NULL && w - 2 >= strlen(text) + 10 + n + 2) {
+			screen_write_puts(&ctx, &gc0, " (filter: ");
+			if (mtd->no_matches)
+				screen_write_puts(&ctx, &gc, "no matches");
+			else
+				screen_write_puts(&ctx, &gc0, "active");
+			screen_write_puts(&ctx, &gc0, ") ");
+		} else
+			screen_write_puts(&ctx, &gc0, " ");
+	}
+	free(text);
+
+	box_x = w - 4;
+	box_y = sy - h - 2;
+
+	if (box_x != 0 && box_y != 0) {
+		screen_write_cursormove(&ctx, 2, h + 1, 0);
+		mtd->drawcb(mtd->modedata, mti->itemdata, &ctx, box_x, box_y);
+	}
+
+done:
+	screen_write_cursormove(&ctx, 0, mtd->current - mtd->offset, 0);
+	screen_write_stop(&ctx);
+}
+
+static struct mode_tree_item *
+mode_tree_search_for(struct mode_tree_data *mtd)
+{
+	struct mode_tree_item	*mti, *last, *next;
+
+	if (mtd->search == NULL)
+		return (NULL);
+
+	mti = last = mtd->line_list[mtd->current].item;
+	for (;;) {
+		if (!TAILQ_EMPTY(&mti->children))
+			mti = TAILQ_FIRST(&mti->children);
+		else if ((next = TAILQ_NEXT(mti, entry)) != NULL)
+			mti = next;
+		else {
+			for (;;) {
+				mti = mti->parent;
+				if (mti == NULL)
+					break;
+				if ((next = TAILQ_NEXT(mti, entry)) != NULL) {
+					mti = next;
+					break;
+				}
+			}
+		}
+		if (mti == NULL)
+			mti = TAILQ_FIRST(&mtd->children);
+		if (mti == last)
+			break;
+
+		if (mtd->searchcb == NULL) {
+			if (strstr(mti->name, mtd->search) != NULL)
+				return (mti);
+			continue;
+		}
+		if (mtd->searchcb(mtd->modedata, mti->itemdata, mtd->search))
+			return (mti);
+	}
+	return (NULL);
+}
+
+static void
+mode_tree_search_set(struct mode_tree_data *mtd)
+{
+	struct mode_tree_item	*mti, *loop;
+	uint64_t		 tag;
+
+	mti = mode_tree_search_for(mtd);
+	if (mti == NULL)
+		return;
+	tag = mti->tag;
+
+	loop = mti->parent;
+	while (loop != NULL) {
+		loop->expanded = 1;
+		loop = loop->parent;
+	}
+
+	mode_tree_build(mtd);
+	mode_tree_set_current(mtd, tag);
+	mode_tree_draw(mtd);
+	mtd->wp->flags |= PANE_REDRAW;
+}
+
+static int
+mode_tree_search_callback(__unused struct client *c, void *data, const char *s,
+    __unused int done)
+{
+	struct mode_tree_data	*mtd = data;
+
+	if (mtd->dead)
+		return (0);
+
+	free(mtd->search);
+	if (s == NULL || *s == '\0') {
+		mtd->search = NULL;
+		return (0);
+	}
+	mtd->search = xstrdup(s);
+	mode_tree_search_set(mtd);
+
+	return (0);
+}
+
+static void
+mode_tree_search_free(void *data)
+{
+	mode_tree_remove_ref(data);
+}
+
+static int
+mode_tree_filter_callback(__unused struct client *c, void *data, const char *s,
+    __unused int done)
+{
+	struct mode_tree_data	*mtd = data;
+
+	if (mtd->dead)
+		return (0);
+
+	if (mtd->filter != NULL)
+		free(mtd->filter);
+	if (s == NULL || *s == '\0')
+		mtd->filter = NULL;
+	else
+		mtd->filter = xstrdup(s);
+
+	mode_tree_build(mtd);
+	mode_tree_draw(mtd);
+	mtd->wp->flags |= PANE_REDRAW;
+
+	return (0);
+}
+
+static void
+mode_tree_filter_free(void *data)
+{
+	mode_tree_remove_ref(data);
+}
+
+static void
+mode_tree_menu_callback(__unused struct menu *menu, __unused u_int idx,
+    key_code key, void *data)
+{
+	struct mode_tree_menu	*mtm = data;
+	struct mode_tree_data	*mtd = mtm->data;
+
+	if (mtd->dead || key == KEYC_NONE)
+		goto out;
+
+	if (mtm->line >= mtd->line_size)
+		goto out;
+	mtd->current = mtm->line;
+	mtd->menucb(mtd->modedata, mtm->c, key);
+
+out:
+	mode_tree_remove_ref(mtd);
+	free(mtm);
+}
+
+static void
+mode_tree_display_menu(struct mode_tree_data *mtd, struct client *c, u_int x,
+    u_int y, int outside)
+{
+	struct mode_tree_item	*mti;
+	struct menu		*menu;
+	const struct menu_item	*items;
+	struct mode_tree_menu	*mtm;
+	char			*title;
+	u_int			 line;
+
+	if (mtd->offset + y > mtd->line_size - 1)
+		line = mtd->current;
+	else
+		line = mtd->offset + y;
+	mti = mtd->line_list[line].item;
+
+	if (!outside) {
+		items = mtd->menu;
+		xasprintf(&title, "#[align=centre]%s", mti->name);
+	} else {
+		items = mode_tree_menu_items;
+		title = xstrdup("");
+	}
+	menu = menu_create(title);
+	menu_add_items(menu, items, NULL, c, NULL);
+	free(title);
+
+	mtm = xmalloc(sizeof *mtm);
+	mtm->data = mtd;
+	mtm->c = c;
+	mtm->line = line;
+	mtd->references++;
+
+	if (x >= (menu->width + 4) / 2)
+		x -= (menu->width + 4) / 2;
+	else
+		x = 0;
+	if (menu_display(menu, 0, NULL, x, y, c, NULL, mode_tree_menu_callback,
+	    mtm) != 0)
+		menu_free(menu);
+}
+
+int
+mode_tree_key(struct mode_tree_data *mtd, struct client *c, key_code *key,
+    struct mouse_event *m, u_int *xp, u_int *yp)
+{
+	struct mode_tree_line	*line;
+	struct mode_tree_item	*current, *parent, *mti;
+	u_int			 i, x, y;
+	int			 choice;
+
+	if (KEYC_IS_MOUSE(*key) && m != NULL) {
+		if (cmd_mouse_at(mtd->wp, m, &x, &y, 0) != 0) {
+			*key = KEYC_NONE;
+			return (0);
+		}
+		if (xp != NULL)
+			*xp = x;
+		if (yp != NULL)
+			*yp = y;
+		if (x > mtd->width || y > mtd->height) {
+			if (*key == KEYC_MOUSEDOWN3_PANE)
+				mode_tree_display_menu(mtd, c, x, y, 1);
+			if (!mtd->preview)
+				*key = KEYC_NONE;
+			return (0);
+		}
+		if (mtd->offset + y < mtd->line_size) {
+			if (*key == KEYC_MOUSEDOWN1_PANE ||
+			    *key == KEYC_MOUSEDOWN3_PANE ||
+			    *key == KEYC_DOUBLECLICK1_PANE)
+				mtd->current = mtd->offset + y;
+			if (*key == KEYC_DOUBLECLICK1_PANE)
+				*key = '\r';
+			else {
+				if (*key == KEYC_MOUSEDOWN3_PANE)
+					mode_tree_display_menu(mtd, c, x, y, 0);
+				*key = KEYC_NONE;
+			}
+		} else {
+			if (*key == KEYC_MOUSEDOWN3_PANE)
+				mode_tree_display_menu(mtd, c, x, y, 0);
+			*key = KEYC_NONE;
+		}
+		return (0);
+	}
+
+	line = &mtd->line_list[mtd->current];
+	current = line->item;
+
+	choice = -1;
+	for (i = 0; i < mtd->line_size; i++) {
+		if (*key == mtd->line_list[i].item->key) {
+			choice = i;
+			break;
+		}
+	}
+	if (choice != -1) {
+		if ((u_int)choice > mtd->line_size - 1) {
+			*key = KEYC_NONE;
+			return (0);
+		}
+		mtd->current = choice;
+		*key = '\r';
+		return (0);
+	}
+
+	switch (*key) {
+	case 'q':
+	case '\033': /* Escape */
+	case '\007': /* C-g */
+		return (1);
+	case KEYC_UP:
+	case 'k':
+	case KEYC_WHEELUP_PANE:
+	case '\020': /* C-p */
+		mode_tree_up(mtd, 1);
+		break;
+	case KEYC_DOWN:
+	case 'j':
+	case KEYC_WHEELDOWN_PANE:
+	case '\016': /* C-n */
+		mode_tree_down(mtd, 1);
+		break;
+	case KEYC_PPAGE:
+	case '\002': /* C-b */
+		for (i = 0; i < mtd->height; i++) {
+			if (mtd->current == 0)
+				break;
+			mode_tree_up(mtd, 1);
+		}
+		break;
+	case KEYC_NPAGE:
+	case '\006': /* C-f */
+		for (i = 0; i < mtd->height; i++) {
+			if (mtd->current == mtd->line_size - 1)
+				break;
+			mode_tree_down(mtd, 1);
+		}
+		break;
+	case 'g':
+	case KEYC_HOME:
+		mtd->current = 0;
+		mtd->offset = 0;
+		break;
+	case 'G':
+	case KEYC_END:
+		mtd->current = mtd->line_size - 1;
+		if (mtd->current > mtd->height - 1)
+			mtd->offset = mtd->current - mtd->height + 1;
+		else
+			mtd->offset = 0;
+		break;
+	case 't':
+		/*
+		 * Do not allow parents and children to both be tagged: untag
+		 * all parents and children of current.
+		 */
+		if (current->no_tag)
+			break;
+		if (!current->tagged) {
+			parent = current->parent;
+			while (parent != NULL) {
+				parent->tagged = 0;
+				parent = parent->parent;
+			}
+			mode_tree_clear_tagged(&current->children);
+			current->tagged = 1;
+		} else
+			current->tagged = 0;
+		if (m != NULL)
+			mode_tree_down(mtd, 0);
+		break;
+	case 'T':
+		for (i = 0; i < mtd->line_size; i++)
+			mtd->line_list[i].item->tagged = 0;
+		break;
+	case '\024': /* C-t */
+		for (i = 0; i < mtd->line_size; i++) {
+			if ((mtd->line_list[i].item->parent == NULL &&
+			    !mtd->line_list[i].item->no_tag) ||
+			    (mtd->line_list[i].item->parent != NULL &&
+			    mtd->line_list[i].item->parent->no_tag))
+				mtd->line_list[i].item->tagged = 1;
+			else
+				mtd->line_list[i].item->tagged = 0;
+		}
+		break;
+	case 'O':
+		mtd->sort_crit.field++;
+		if (mtd->sort_crit.field >= mtd->sort_size)
+			mtd->sort_crit.field = 0;
+		mode_tree_build(mtd);
+		break;
+	case 'r':
+		mtd->sort_crit.reversed = !mtd->sort_crit.reversed;
+		mode_tree_build(mtd);
+		break;
+	case KEYC_LEFT:
+	case 'h':
+	case '-':
+		if (line->flat || !current->expanded)
+			current = current->parent;
+		if (current == NULL)
+			mode_tree_up(mtd, 0);
+		else {
+			current->expanded = 0;
+			mtd->current = current->line;
+			mode_tree_build(mtd);
+		}
+		break;
+	case KEYC_RIGHT:
+	case 'l':
+	case '+':
+		if (line->flat || current->expanded)
+			mode_tree_down(mtd, 0);
+		else if (!line->flat) {
+			current->expanded = 1;
+			mode_tree_build(mtd);
+		}
+		break;
+	case '-'|KEYC_META:
+		TAILQ_FOREACH(mti, &mtd->children, entry)
+			mti->expanded = 0;
+		mode_tree_build(mtd);
+		break;
+	case '+'|KEYC_META:
+		TAILQ_FOREACH(mti, &mtd->children, entry)
+			mti->expanded = 1;
+		mode_tree_build(mtd);
+		break;
+	case '?':
+	case '/':
+	case '\023': /* C-s */
+		mtd->references++;
+		status_prompt_set(c, NULL, "(search) ", "",
+		    mode_tree_search_callback, mode_tree_search_free, mtd,
+		    PROMPT_NOFORMAT, PROMPT_TYPE_SEARCH);
+		break;
+	case 'n':
+		mode_tree_search_set(mtd);
+		break;
+	case 'f':
+		mtd->references++;
+		status_prompt_set(c, NULL, "(filter) ", mtd->filter,
+		    mode_tree_filter_callback, mode_tree_filter_free, mtd,
+		    PROMPT_NOFORMAT, PROMPT_TYPE_SEARCH);
+		break;
+	case 'v':
+		mtd->preview = !mtd->preview;
+		mode_tree_build(mtd);
+		if (mtd->preview)
+			mode_tree_check_selected(mtd);
+		break;
+	}
+	return (0);
+}
+
+void
+mode_tree_run_command(struct client *c, struct cmd_find_state *fs,
+    const char *template, const char *name)
+{
+	struct cmdq_state	*state;
+	char			*command, *error;
+	enum cmd_parse_status	 status;
+
+	command = cmd_template_replace(template, name, 1);
+	if (command != NULL && *command != '\0') {
+		state = cmdq_new_state(fs, NULL, 0);
+		status = cmd_parse_and_append(command, NULL, c, state, &error);
+		if (status == CMD_PARSE_ERROR) {
+			if (c != NULL) {
+				*error = toupper((u_char)*error);
+				status_message_set(c, -1, 1, 0, "%s", error);
+			}
+			free(error);
+		}
+		cmdq_free_state(state);
+	}
+	free(command);
+}