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	tFix crash and other misc. bugs - ledit - Text editor (WIP)
	git clone git://lumidify.org/ledit.git (fast, but not encrypted)
	git clone https://lumidify.org/git/ledit.git (encrypted, but very slow)
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	---
	commit 155a081f559a9ecfddd8b086c7d91187c2af4bc2
	parent 81ddea61d765938b662b3456b3fe80369cfbc138
	Author: lumidify <[email protected]>
	Date: Wed, 25 Oct 2023 13:42:10 +0200

	Fix crash and other misc. bugs

	Diffstat:
	M buffer.c \| 14 ++++++++++----
	M keys_basic.c \| 8 ++++----
	M leditrc.5 \| 6 +++---
	M memory.c \| 4 +++-
	M view.c \| 30 ++++++++++++++----------------

	5 files changed, 34 insertions(+), 28 deletions(-)
	---
	diff --git a/buffer.c b/buffer.c
	t@@ -574,8 +574,8 @@ buffer_insert_text_base(ledit_buffer *buffer, size_t line_…
	ledit_assert(index <= line->len);
	/* \0 is not included in line->len */
	resize_and_move_text_gap(line, add_sz3(line->len, len, 1), index);
	- /* the gap is now located at 'index' and least large enough to hold th…
	- memcpy(line->text + index, text, len);
	+ /* the gap is now located at 'index' and at least large enough to hold…
	+ memmove(line->text + index, text, len);
	line->gap += len;
	line->len += len;
	for (size_t i = 0; i < buffer->views_num; i++) {
	t@@ -920,8 +920,10 @@ buffer_delete_line_section_base(ledit_buffer *buffer, siz…
	(void)add_sz(start, length); /* just check that no overflow */
	ledit_assert(start + length <= l->len);
	if (start <= l->gap && start + length >= l->gap) {
	+ /* range includes gap */
	l->gap = start;
	- } else if (start < l->gap && start + length < l->gap) {
	+ } else if (start < l->gap && start + length <= l->gap) {
	+ /* entire range is before gap */
	memmove(
	l->text + l->cap - l->len + start + length,
	l->text + start + length,
	t@@ -929,11 +931,15 @@ buffer_delete_line_section_base(ledit_buffer *buffer, si…
	);
	l->gap = start;
	} else {
	+ /* entire range is after gap */
	+ /* move piece between end of gap and
	+ start of range to beginning of gap */
	memmove(
	l->text + l->gap,
	l->text + l->gap + l->cap - l->len,
	- start - l->gap - l->cap + l->len
	+ start - l->gap
	);
	+ l->gap += start - l->gap;
	}
	l->len -= length;
	/* possibly decrease size of line */
	diff --git a/keys_basic.c b/keys_basic.c
	t@@ -1930,18 +1930,18 @@ move_cursor_up_down(ledit_view *view, int dir) {
	view_get_softline_bounds(view, new_line, new_softline, &start,…
	cb(view, new_line, start, KEY_MOTION_LINE);
	} else {
	- int lineno, x;
	+ int lineno, x, diff = 0, old_line = view->cur_line;
	view_pos_to_x_softline(view, view->cur_line, view->cur_index, …
	view->cur_index = view_x_softline_to_pos(view, new_line, x, ne…
	if (view->cur_line != new_line)
	- view_wipe_line_cursor_attrs(view, view->cur_line);
	+ diff = 1;
	view->cur_line = new_line;

	if (view->mode == VISUAL) {
	view_set_selection(view, view->sel.line1, view->sel.by…
	- } else if (view->mode == INSERT && view->sel_valid) {
	- view_wipe_selection(view);
	} else if (view->mode == NORMAL) {
	+ if (diff)
	+ view_wipe_line_cursor_attrs(view, old_line);
	view_set_line_cursor_attrs(view, view->cur_line, view-…
	}
	view->redraw = 1;
	diff --git a/leditrc.5 b/leditrc.5
	t@@ -1,4 +1,4 @@
	-.Dd October 5, 2023
	+.Dd October 6, 2023
	.Dt LEDITRC 5
	.Os
	.Sh NAME
	t@@ -68,7 +68,7 @@ Yes, this is inconsistent and confusing.
	As defined by Unicode (UAX #29).
	A grapheme may be composed of multiple Unicode characters.
	The cursor is only allowed to be at valid grapheme boundaries, but
	-some operations work with characters, while other work with graphemes.
	+some operations work with characters, while others work with graphemes.
	.It Ar paste buffer
	When text is deleted or explicitly copied (yanked), it is written to the
	paste buffer so that it can be pasted later.
	t@@ -82,7 +82,7 @@ A hardline is an actual line separated from the other lines …
	character.
	A softline is a displayed line, but might only be part of a
	hardline if the text is wrapped.
	-.Nm
	+.Xr ledit 1
	can be in hardline or softline mode.
	Some commands change their behavior depending on this mode, for instance
	to move the cursor down a certain number of softlines instead of hardlines.
	diff --git a/memory.c b/memory.c
	t@@ -162,6 +162,7 @@ resize_and_move_gap(
	size_t old_gap, size_t old_cap, size_t len,
	size_t min_size, size_t index,
	size_t new_gap_ret, size_t new_cap_ret) {
	+ ledit_assert(array != NULL \|\| (len == 0 && old_cap == 0));
	ledit_assert(index <= len);
	ledit_assert(len <= old_cap);
	ledit_assert(old_gap <= len);
	t@@ -213,7 +214,8 @@ resize_and_move_gap(
	/* otherwise, parts may be cut off */
	ledit_assert(min_size >= len);
	/* FIXME: optimize this */
	- move_gap(array, elem_size, len, old_gap, old_cap, len, NULL);
	+ if (array)
	+ move_gap(array, elem_size, len, old_gap, old_cap, len,…
	array = ledit_reallocarray(array, new_cap, elem_size);
	move_gap(array, elem_size, index, len, new_cap, len, NULL);
	}
	diff --git a/view.c b/view.c
	t@@ -198,6 +198,8 @@ resize_and_move_line_gap(ledit_view *view, size_t min_size…
	a part, which may cause these notification functions to be called) */
	void
	view_notify_insert_text(ledit_view *view, size_t line, size_t index, size_t le…
	+ int sel_valid = view->sel_valid;
	+ view_wipe_selection(view);
	ledit_view_line *vl = view_get_line(view, line);
	vl->text_dirty = 1;
	if (line == view->cur_line && index < view->cur_index) {
	t@@ -206,14 +208,14 @@ view_notify_insert_text(ledit_view *view, size_t line, s…
	if (vl->cursor_index_valid)
	view_set_line_cursor_attrs(view, line, view->cur_index…
	}
	- /* FIXME: maybe just wipe selection completely, or at least
	- when in insert mode? */
	- if (view->sel_valid)
	+ if (sel_valid)
	view_set_selection(view, view->cur_line, view->cur_index, view…
	}

	void
	view_notify_delete_text(ledit_view *view, size_t line, size_t index, size_t le…
	+ int sel_valid = view->sel_valid;
	+ view_wipe_selection(view);
	ledit_view_line *vl = view_get_line(view, line);
	vl->text_dirty = 1;
	if (line == view->cur_line) {
	t@@ -232,12 +234,14 @@ view_notify_delete_text(ledit_view *view, size_t line, s…
	if (vl->cursor_index_valid)
	view_set_line_cursor_attrs(view, line, view->cur_index…
	}
	- if (view->sel_valid)
	+ if (sel_valid)
	view_set_selection(view, view->cur_line, view->cur_index, view…
	}

	void
	view_notify_append_line(ledit_view *view, size_t line) {
	+ int sel_valid = view->sel_valid;
	+ view_wipe_selection(view);
	cache_invalidate_from_line(
	view->cache, line + 1, view,
	&invalidate_pixmap_line_helper, &invalidate_layout_line_helper
	t@@ -245,12 +249,12 @@ view_notify_append_line(ledit_view *view, size_t line) {
	resize_and_move_line_gap(view, add_sz(view->lines_num, 1), line + 1);
	if (line < view->cur_line)
	view->cur_line++;
	- if (view->sel_valid)
	- view_set_selection(view, view->cur_line, view->cur_index, view…
	view->lines_num++;
	view->lines_gap++;
	ledit_view_line *vl = view_get_line(view, line + 1);
	init_line(view, vl);
	+ if (sel_valid)
	+ view_set_selection(view, view->cur_line, view->cur_index, view…
	}

	void
	t@@ -277,8 +281,6 @@ view_notify_delete_lines(ledit_view *view, size_t index1, …
	if (vl->cursor_index_valid)
	view_set_line_cursor_attrs(view, view->cur_line, view-…
	}
	- if (sel_valid)
	- view_set_selection(view, view->cur_line, view->cur_index, view…
	cache_invalidate_from_line(
	view->cache, index1, view,
	&invalidate_pixmap_line_helper, &invalidate_layout_line_helper
	t@@ -295,6 +297,8 @@ view_notify_delete_lines(ledit_view *view, size_t index1, …
	ledit_view_line *vl = view_get_line(view, 0);
	vl->y_offset = 0;
	}
	+ if (sel_valid)
	+ view_set_selection(view, view->cur_line, view->cur_index, view…
	}

	void
	t@@ -1760,14 +1764,8 @@ view_wipe_selection(ledit_view *view) {
	}
	}
	view->sel_valid = 0;
	- /* FIXME: check what makes most sense here - this used to be set to 0,…
	- caused "jumping effects" because some functions (cursor movement) u…
	- values without checking view->sel_valid before (which should actual…
	- changed because it is an error) */
	- view->sel.line1 = view->sel.line2 = view->cur_line;
	- view->sel.byte1 = view->sel.byte2 = view->cur_index;
	- if (view->mode == NORMAL)
	- view_set_line_cursor_attrs(view, view->cur_line, view->cur_ind…
	+ view->sel.line1 = view->sel.line2 = 0;
	+ view->sel.byte1 = view->sel.byte2 = 0;
	}

	void