Differential D5222 Diff 16445 source/blender/blenkernel/intern/text.c

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source/blender/blenkernel/intern/text.c

Show First 20 Lines • Show All 73 Lines • ▼ Show 20 Lines
* TXT_ISSCRIPT - should be set if the user has designated the text		* TXT_ISSCRIPT - should be set if the user has designated the text
* as a script. (NEW: this was unused, but now it is needed by		* as a script. (NEW: this was unused, but now it is needed by
* space handler script links (see header_view3d.c, for example)		* space handler script links (see header_view3d.c, for example)
*		*
* ->>> see also: /makesdna/DNA_text_types.h		* ->>> see also: /makesdna/DNA_text_types.h
*		*
* Display		* Display
* --		* --
		*
* The st->top determines at what line the top of the text is displayed.		* The st->top determines at what line the top of the text is displayed.
* If the user moves the cursor the st containing that cursor should		* If the user moves the cursor the st containing that cursor should
* be popped ... other st's retain their own top location.		* be popped ... other st's retain their own top location.
*
* Undo
* --
* Undo/Redo works by storing
* events in a queue, and a pointer
* to the current position in the
* queue...
*
* Events are stored using an
* arbitrary op-code system
* to keep track of
* a) the two cursors (normal and selected)
* b) input (visible and control (ie backspace))
*
* input data is stored as its
* ASCII value, the opcodes are
* then selected to not conflict.
*
* opcodes with data in between are
* written at the beginning and end
* of the data to allow undo and redo
* to simply check the code at the current
* undo position
*/		*/

/* Undo opcodes */

enum {
/* Complex editing */
/* 1 - opcode is followed by 1 byte for ascii character and opcode (repeat)) */
/* 2 - opcode is followed by 2 bytes for utf-8 character and opcode (repeat)) */
/* 3 - opcode is followed by 3 bytes for utf-8 character and opcode (repeat)) */
/* 4 - opcode is followed by 4 bytes for unicode character and opcode (repeat)) */
UNDO_INSERT_1 = 013,
UNDO_INSERT_2 = 014,
UNDO_INSERT_3 = 015,
UNDO_INSERT_4 = 016,

UNDO_BS_1 = 017,
UNDO_BS_2 = 020,
UNDO_BS_3 = 021,
UNDO_BS_4 = 022,

UNDO_DEL_1 = 023,
UNDO_DEL_2 = 024,
UNDO_DEL_3 = 025,
UNDO_DEL_4 = 026,

/* Text block (opcode is followed
* by 4 character length ID + the text
* block itself + the 4 character length
* ID (repeat) and opcode (repeat)) */
UNDO_DBLOCK = 027, /* Delete block */
UNDO_IBLOCK = 030, /* Insert block */

/* Misc */
UNDO_INDENT = 032,
UNDO_UNINDENT = 033,
UNDO_COMMENT = 034,
UNDO_UNCOMMENT = 035,

UNDO_MOVE_LINES_UP = 036,
UNDO_MOVE_LINES_DOWN = 037,

UNDO_DUPLICATE = 040,
};

/***/		/***/

static void txt_pop_first(Text *text);		static void txt_pop_first(Text *text);
static void txt_pop_last(Text *text);		static void txt_pop_last(Text *text);
static void txt_undo_add_blockop(Text text, TextUndoBuf utxt, int op, const char *buf);
static void txt_delete_line(Text text, TextLine line);		static void txt_delete_line(Text text, TextLine line);
static void txt_delete_sel(Text text, TextUndoBuf utxt);		static void txt_delete_sel(Text *text);
static void txt_make_dirty(Text *text);		static void txt_make_dirty(Text *text);

/***/		/***/

/**		/**
* Set to true when undoing (so we don't generate undo steps while undoing).		* \note caller must handle `compiled` member.
*
* Also use to disable undo entirely.
*/
static bool undoing;

/**
* \note caller must handle `undo_buf` and `compiled` members.
*/		*/
void BKE_text_free_lines(Text *text)		void BKE_text_free_lines(Text *text)
{		{
for (TextLine tmp = text->lines.first, tmp_next; tmp; tmp = tmp_next) {		for (TextLine tmp = text->lines.first, tmp_next; tmp; tmp = tmp_next) {
tmp_next = tmp->next;		tmp_next = tmp->next;
MEM_freeN(tmp->line);		MEM_freeN(tmp->line);
if (tmp->format) {		if (tmp->format) {
MEM_freeN(tmp->format);		MEM_freeN(tmp->format);
▲ Show 20 Lines • Show All 331 Lines • ▼ Show 20 Lines	Text BKE_text_copy(Main bmain, const Text *ta)
return ta_copy;		return ta_copy;
}		}

void BKE_text_make_local(Main bmain, Text text, const bool lib_local)		void BKE_text_make_local(Main bmain, Text text, const bool lib_local)
{		{
BKE_id_make_local_generic(bmain, &text->id, true, lib_local);		BKE_id_make_local_generic(bmain, &text->id, true, lib_local);
}		}

void BKE_text_clear(Text text, TextUndoBuf utxt) /* called directly from rna */		void BKE_text_clear(Text text) / called directly from rna */
{		{
const bool undoing_orig = undoing;
undoing = (utxt == NULL);

txt_sel_all(text);		txt_sel_all(text);
txt_delete_sel(text, utxt);		txt_delete_sel(text);

undoing = undoing_orig;

txt_make_dirty(text);		txt_make_dirty(text);
}		}

void BKE_text_write(Text text, TextUndoBuf utxt, const char str) / called directly from rna */		void BKE_text_write(Text text, const char str) /* called directly from rna */
{		{
const bool undoing_orig = undoing;		txt_insert_buf(text, str);
undoing = (utxt == NULL);

txt_insert_buf(text, utxt, str);
txt_move_eof(text, 0);		txt_move_eof(text, 0);

undoing = undoing_orig;

txt_make_dirty(text);		txt_make_dirty(text);
}		}

/* returns 0 if file on disk is the same or Text is in memory only		/* returns 0 if file on disk is the same or Text is in memory only
* returns 1 if file has been modified on disk since last local edit		* returns 1 if file has been modified on disk since last local edit
* returns 2 if file on disk has been deleted		* returns 2 if file on disk has been deleted
* -1 is returned if an error occurs */		* -1 is returned if an error occurs */

▲ Show 20 Lines • Show All 715 Lines • ▼ Show 20 Lines	void txt_order_cursors(Text *text, const bool reverse)
}		}
}		}

bool txt_has_sel(Text *text)		bool txt_has_sel(Text *text)
{		{
return ((text->curl != text->sell) \|\| (text->curc != text->selc));		return ((text->curl != text->sell) \|\| (text->curc != text->selc));
}		}

static void txt_delete_sel(Text text, TextUndoBuf utxt)		static void txt_delete_sel(Text *text)
{		{
TextLine *tmpl;		TextLine *tmpl;
char *buf;		char *buf;

if (!text->curl) {		if (!text->curl) {
return;		return;
}		}
if (!text->sell) {		if (!text->sell) {
return;		return;
}		}

if (!txt_has_sel(text)) {		if (!txt_has_sel(text)) {
return;		return;
}		}

txt_order_cursors(text, false);		txt_order_cursors(text, false);

if (!undoing) {
buf = txt_sel_to_buf(text, NULL);
txt_undo_add_blockop(text, utxt, UNDO_DBLOCK, buf);
MEM_freeN(buf);
}

buf = MEM_mallocN(text->curc + (text->sell->len - text->selc) + 1, "textline_string");		buf = MEM_mallocN(text->curc + (text->sell->len - text->selc) + 1, "textline_string");

strncpy(buf, text->curl->line, text->curc);		strncpy(buf, text->curl->line, text->curc);
strcpy(buf + text->curc, text->sell->line + text->selc);		strcpy(buf + text->curc, text->sell->line + text->selc);
buf[text->curc + (text->sell->len - text->selc)] = 0;		buf[text->curc + (text->sell->len - text->selc)] = 0;

make_new_line(text->curl, buf);		make_new_line(text->curl, buf);

Show All 39 Lines	if (!text->curl) {
return;		return;
}		}

text->curc = 0;		text->curc = 0;
text->sell = text->curl;		text->sell = text->curl;
text->selc = text->sell->len;		text->selc = text->sell->len;
}		}

		/* -------------------------------------------------------------------- */
		/** \name Fast Buffer Conversion API's
		*
		* Buffer conversion functions that rely on the buffer already being validated.
		* Used by undo/redo.
		*
		* The only requirement for these functions is that they're reverse-able,
		* the undo logic doesn't inspect their content.
		*
		* Currently buffers:
		* - Always ends with a new-line.
		* - Are not null terminated.
		* \{ */

		/**
		* Create a buffer, the only requirement is #txt_from_buf_for_undo can decode it.
		*/
		char txt_to_buf_for_undo(Text text, int *r_buf_len)
		{
		int buf_len = 0;
		for (const TextLine *l = text->lines.first; l; l = l->next) {
		buf_len += l->len + 1;
		}
		char *buf = MEM_mallocN(buf_len, __func__);
		char *buf_step = buf;
		for (const TextLine *l = text->lines.first; l; l = l->next) {
		memcpy(buf_step, l->line, l->len);
		buf_step += l->len;
		*buf_step++ = '\n';
		}
		*r_buf_len = buf_len;
		return buf;
		}

		/**
		* Decode a buffer from #txt_to_buf_for_undo.
		*/
		brechtUnsubmitted Done Inline Actions This assumes there is always a `\n` at the end of the buffer? That's not obviously a safe assumption. brecht: This assumes there is always a `\n` at the end of the buffer? That's not obviously a safe…
		campbellbartonAuthorUnsubmitted Done Inline Actions Renamed these functions and added comments to denote them as being specifically for undo. Since we already have more general functions for converting from/to buffers which should be used in all other cases. campbellbarton: Renamed these functions and added comments to denote them as being specifically for undo.
		void txt_from_buf_for_undo(Text text, const char buf, int buf_len)
		{
		const char *buf_end = buf + buf_len;
		const char *buf_step = buf;

		/* First re-use existing lines.
		* Good for undo since it means in practice many operations re-use all
		* except for the modified line. */
		TextLine *l_src = text->lines.first;
		BLI_listbase_clear(&text->lines);
		while (buf_step != buf_end && l_src) {
		/* New lines are ensured by #txt_to_buf_for_undo. */
		const char *buf_step_next = strchr(buf_step, '\n');
		const int len = buf_step_next - buf_step;

		TextLine *l = l_src;
		l_src = l_src->next;
		if (l->len != len) {
		l->line = MEM_reallocN(l->line, len + 1);
		l->len = len;
		}
		MEM_SAFE_FREE(l->format);

		memcpy(l->line, buf_step, len);
		l->line[len] = '\0';
		BLI_addtail(&text->lines, l);
		buf_step = buf_step_next + 1;
		}

		brechtUnsubmitted Done Inline Actions Same here. brecht: Same here.
		/* If we have extra lines. */
		while (l_src != NULL) {
		TextLine *l_src_next = l_src->next;
		brechtUnsubmitted Not Done Inline Actions Why not calloc? brecht: Why not calloc?
		campbellbartonAuthorUnsubmitted Done Inline Actions None of the other line allocations of `TextLine` calloc, so it's safe not to. campbellbarton: None of the other line allocations of `TextLine` calloc, so it's safe not to.
		MEM_freeN(l_src->line);
		if (l_src->format) {
		MEM_freeN(l_src->format);
		}
		MEM_freeN(l_src);
		l_src = l_src_next;
		}

		while (buf_step != buf_end) {
		/* New lines are ensured by #txt_to_buf_for_undo. */
		const char *buf_step_next = strchr(buf_step, '\n');
		const int len = buf_step_next - buf_step;

		TextLine *l = MEM_mallocN(sizeof(TextLine), "textline");
		l->line = MEM_mallocN(len + 1, "textline_string");
		l->len = len;
		l->format = NULL;

		memcpy(l->line, buf_step, len);
		l->line[len] = '\0';
		BLI_addtail(&text->lines, l);
		buf_step = buf_step_next + 1;
		}

		text->curl = text->sell = text->lines.first;
		text->curc = text->selc = 0;

		txt_make_dirty(text);
		}

		/** \} */

/***************************/		/***************************/
/* Cut and paste functions */		/* Cut and paste functions */
/***************************/		/***************************/

char txt_to_buf(Text text, int *r_buf_strlen)		char txt_to_buf(Text text, int *r_buf_strlen)
{		{
int length;		int length;
TextLine tmp, linef, *linel;		TextLine tmp, linef, *linel;
▲ Show 20 Lines • Show All 210 Lines • ▼ Show 20 Lines	char txt_sel_to_buf(Text text, int *r_buf_strlen)

if (r_buf_strlen) {		if (r_buf_strlen) {
*r_buf_strlen = length;		*r_buf_strlen = length;
}		}

return buf;		return buf;
}		}

void txt_insert_buf(Text text, TextUndoBuf utxt, const char *in_buffer)		void txt_insert_buf(Text text, const char in_buffer)
{		{
const bool undoing_orig = undoing;
int l = 0, len;		int l = 0, len;
size_t i = 0, j;		size_t i = 0, j;
TextLine *add;		TextLine *add;
char *buffer;		char *buffer;

if (!in_buffer) {		if (!in_buffer) {
return;		return;
}		}

txt_delete_sel(text, utxt);		txt_delete_sel(text);

len = strlen(in_buffer);		len = strlen(in_buffer);
buffer = BLI_strdupn(in_buffer, len);		buffer = BLI_strdupn(in_buffer, len);
len += txt_extended_ascii_as_utf8(&buffer);		len += txt_extended_ascii_as_utf8(&buffer);

if (!undoing) {
txt_undo_add_blockop(text, utxt, UNDO_IBLOCK, buffer);
}
undoing = true;

/* Read the first line (or as close as possible */		/* Read the first line (or as close as possible */
while (buffer[i] && buffer[i] != '\n') {		while (buffer[i] && buffer[i] != '\n') {
txt_add_raw_char(text, utxt, BLI_str_utf8_as_unicode_step(buffer, &i));		txt_add_raw_char(text, BLI_str_utf8_as_unicode_step(buffer, &i));
}		}

if (buffer[i] == '\n') {		if (buffer[i] == '\n') {
txt_split_curline(text, utxt);		txt_split_curline(text);
i++;		i++;

while (i < len) {		while (i < len) {
l = 0;		l = 0;

while (buffer[i] && buffer[i] != '\n') {		while (buffer[i] && buffer[i] != '\n') {
i++;		i++;
l++;		l++;
}		}

if (buffer[i] == '\n') {		if (buffer[i] == '\n') {
add = txt_new_linen(buffer + (i - l), l);		add = txt_new_linen(buffer + (i - l), l);
BLI_insertlinkbefore(&text->lines, text->curl, add);		BLI_insertlinkbefore(&text->lines, text->curl, add);
i++;		i++;
}		}
else {		else {
for (j = i - l; j < i && j < len;) {		for (j = i - l; j < i && j < len;) {
txt_add_raw_char(text, utxt, BLI_str_utf8_as_unicode_step(buffer, &j));		txt_add_raw_char(text, BLI_str_utf8_as_unicode_step(buffer, &j));
}		}
break;		break;
}		}
}		}
}		}

MEM_freeN(buffer);		MEM_freeN(buffer);
undoing = undoing_orig;
}

/******************/
/* Undo functions */
/******************/

static bool max_undo_test(TextUndoBuf *utxt, int x)
{
/* Normally over-allocating is preferred,
* however in this case the buffer is small enough and re-allocation
* fast enough for each undo step that it's not a problem to allocate each time.
* This also saves on some memory when we have many text buffers
* that would have an empty undo memory allocated.
*/

/* Add one for the null terminator. */
utxt->len = utxt->pos + x + 1;
if (utxt->len > TXT_MAX_UNDO) {
/* XXX error("Undo limit reached, buffer cleared\n"); */
MEM_freeN(utxt->buf);
return false;
}
else {
/* Small reallocations on each undo step is fine. */
utxt->buf = MEM_recallocN(utxt->buf, utxt->len);
}
return true;
}

static void txt_undo_end(Text UNUSED(text), TextUndoBuf utxt)
{
int undo_pos_end = utxt->pos + 1;
BLI_assert(undo_pos_end + 1 == utxt->len);
utxt->buf[undo_pos_end] = '\0';
}

/* Call once undo is done. */
#ifndef NDEBUG

#endif

#if 0 /* UNUSED */
static void dump_buffer(TextUndoBuf *utxt)
{
int i = 0;

while (i++ < utxt->undo_pos)
printf("%d: %d %c\n", i, utxt->buf[i], utxt->buf[i]);
}

/* Note: this function is outdated and must be updated if needed for future use */
void txt_print_undo(Text *text)
{
int i = 0;
int op;
const char *ops;
int linep, charp;

dump_buffer(text);

printf("---< Undo Buffer >---\n");

printf("UndoPosition is %d\n", utxt->pos);

while (i <= utxt->pos) {
op = utxt->buf[i];

if (op == UNDO_INSERT_1) {
ops = "Insert ascii ";
}
else if (op == UNDO_INSERT_2) {
ops = "Insert 2 bytes ";
}
else if (op == UNDO_INSERT_3) {
ops = "Insert 3 bytes ";
}
else if (op == UNDO_INSERT_4) {
ops = "Insert unicode ";
}
else if (op == UNDO_BS_1) {
ops = "Backspace for ascii ";
}
else if (op == UNDO_BS_2) {
ops = "Backspace for 2 bytes ";
}
else if (op == UNDO_BS_3) {
ops = "Backspace for 3 bytes ";
}
else if (op == UNDO_BS_4) {
ops = "Backspace for unicode ";
}
else if (op == UNDO_DEL_1) {
ops = "Delete ascii ";
}
else if (op == UNDO_DEL_2) {
ops = "Delete 2 bytes ";
}
else if (op == UNDO_DEL_3) {
ops = "Delete 3 bytes ";
}
else if (op == UNDO_DEL_4) {
ops = "Delete unicode ";
}
else if (op == UNDO_DBLOCK) {
ops = "Delete text block";
}
else if (op == UNDO_IBLOCK) {
ops = "Insert text block";
}
else if (op == UNDO_INDENT) {
ops = "Indent ";
}
else if (op == UNDO_UNINDENT) {
ops = "Unindent ";
}
else if (op == UNDO_COMMENT) {
ops = "Comment ";
}
else if (op == UNDO_UNCOMMENT) {
ops = "Uncomment ";
}
else {
ops = "Unknown";
}

printf("Op (%o) at %d = %s", op, i, ops);
if (op >= UNDO_INSERT_1 && op <= UNDO_DEL_4) {
i++;
printf(" - Char is ");
switch (op) {
case UNDO_INSERT_1:
case UNDO_BS_1:
case UNDO_DEL_1:
printf("%c", utxt->buf[i]);
i++;
break;
case UNDO_INSERT_2:
case UNDO_BS_2:
case UNDO_DEL_2:
printf("%c%c", utxt->buf[i], utxt->buf[i + 1]);
i += 2;
break;
case UNDO_INSERT_3:
case UNDO_BS_3:
case UNDO_DEL_3:
printf("%c%c%c", utxt->buf[i], utxt->buf[i + 1], utxt->buf[i + 2]);
i += 3;
break;
case UNDO_INSERT_4:
case UNDO_BS_4:
case UNDO_DEL_4: {
unsigned int uc;
char c[BLI_UTF8_MAX + 1];
size_t c_len;
uc = utxt->buf[i];
i++;
uc = uc + (utxt->buf[i] << 8);
i++;
uc = uc + (utxt->buf[i] << 16);
i++;
uc = uc + (utxt->buf[i] << 24);
i++;
c_len = BLI_str_utf8_from_unicode(uc, c);
c[c_len] = '\0';
puts(c);
break;
}
}
}
else if (op == UNDO_DBLOCK \|\| op == UNDO_IBLOCK) {
i++;

linep = utxt->buf[i];
i++;
linep = linep + (utxt->buf[i] << 8);
i++;
linep = linep + (utxt->buf[i] << 16);
i++;
linep = linep + (utxt->buf[i] << 24);
i++;

printf(" (length %d) <", linep);

while (linep > 0) {
putchar(utxt->buf[i]);
linep--;
i++;
}

linep = utxt->buf[i];
i++;
linep = linep + (utxt->buf[i] << 8);
i++;
linep = linep + (utxt->buf[i] << 16);
i++;
linep = linep + (utxt->buf[i] << 24);
i++;
printf("> (%d)", linep);
}
else if (op == UNDO_INDENT \|\| op == UNDO_UNINDENT) {
i++;

charp = utxt->buf[i];
i++;
charp = charp + (utxt->buf[i] << 8);
i++;

linep = utxt->buf[i];
i++;
linep = linep + (utxt->buf[i] << 8);
i++;
linep = linep + (utxt->buf[i] << 16);
i++;
linep = linep + (utxt->buf[i] << 24);
i++;

printf("to <%d, %d> ", linep, charp);

charp = utxt->buf[i];
i++;
charp = charp + (utxt->buf[i] << 8);
i++;

linep = utxt->buf[i];
i++;
linep = linep + (utxt->buf[i] << 8);
i++;
linep = linep + (utxt->buf[i] << 16);
i++;
linep = linep + (utxt->buf[i] << 24);
i++;

printf("from <%d, %d>", linep, charp);
}

printf(" %d\n", i);
i++;
}
}
#endif

static void txt_undo_store_uint16(char undo_buf, int undo_pos, unsigned short value)
{
undo_buf[*undo_pos] = (value)&0xff;
(*undo_pos)++;
undo_buf[*undo_pos] = (value >> 8) & 0xff;
(*undo_pos)++;
}

static void txt_undo_store_uint32(char undo_buf, int undo_pos, unsigned int value)
{
undo_buf[*undo_pos] = (value)&0xff;
(*undo_pos)++;
undo_buf[*undo_pos] = (value >> 8) & 0xff;
(*undo_pos)++;
undo_buf[*undo_pos] = (value >> 16) & 0xff;
(*undo_pos)++;
undo_buf[*undo_pos] = (value >> 24) & 0xff;
(*undo_pos)++;
}

/* store the cur cursor to the undo buffer (6 bytes)*/
static void txt_undo_store_cur(Text text, TextUndoBuf utxt)
{
txt_undo_store_uint16(utxt->buf, &utxt->pos, text->curc);
txt_undo_store_uint32(utxt->buf, &utxt->pos, txt_get_span(text->lines.first, text->curl));
}

/* store the sel cursor to the undo buffer (6 bytes) */
static void txt_undo_store_sel(Text text, TextUndoBuf utxt)
{
txt_undo_store_uint16(utxt->buf, &utxt->pos, text->selc);
txt_undo_store_uint32(utxt->buf, &utxt->pos, txt_get_span(text->lines.first, text->sell));
}

/* store both cursors to the undo buffer (12 bytes) */
static void txt_undo_store_cursors(Text text, TextUndoBuf utxt)
{
txt_undo_store_cur(text, utxt);
txt_undo_store_sel(text, utxt);
}

/* store an operator along with a block of data */
static void txt_undo_add_blockop(Text text, TextUndoBuf utxt, int op, const char *buf)
{
unsigned int length = strlen(buf);

if (!max_undo_test(utxt, 2 + 12 + 4 + length + 4 + 1)) {
return;
}
/* 2 bytes */
utxt->pos++;
utxt->buf[utxt->pos] = op;
utxt->pos++;
/* 12 bytes */
txt_undo_store_cursors(text, utxt);
/* 4 bytes */
txt_undo_store_uint32(utxt->buf, &utxt->pos, length);
/* 'length' bytes */
memcpy(utxt->buf + utxt->pos, buf, length);
utxt->pos += length;
/* 4 bytes */
txt_undo_store_uint32(utxt->buf, &utxt->pos, length);
/* 1 byte */
utxt->buf[utxt->pos] = op;

txt_undo_end(text, utxt);
}

/* store a regular operator */
void txt_undo_add_op(Text text, TextUndoBuf utxt, int op)
{
if (!max_undo_test(utxt, 2 + 12 + 1)) {
return;
}

/* 2 bytes */
utxt->pos++;
utxt->buf[utxt->pos] = op;
utxt->pos++;
/* 12 bytes */
txt_undo_store_cursors(text, utxt);
/* 1 byte */
utxt->buf[utxt->pos] = op;

txt_undo_end(text, utxt);
}

/* store an operator for a single character */
static void txt_undo_add_charop(Text text, TextUndoBuf utxt, int op_start, unsigned int c)
{
char utf8[BLI_UTF8_MAX];
size_t i, utf8_size = BLI_str_utf8_from_unicode(c, utf8);

if (utf8_size < 4 && 0) {
if (!max_undo_test(utxt, 2 + 6 + utf8_size + 1)) {
return;
}
/* 2 bytes */
utxt->pos++;
utxt->buf[utxt->pos] = op_start + utf8_size - 1;
utxt->pos++;
/* 6 bytes */
txt_undo_store_cur(text, utxt);
/* 'utf8_size' bytes */
for (i = 0; i < utf8_size; i++) {
utxt->buf[utxt->pos] = utf8[i];
utxt->pos++;
}
/* 1 byte */
utxt->buf[utxt->pos] = op_start + utf8_size - 1;
}
else {
if (!max_undo_test(utxt, 2 + 6 + 4 + 1)) {
return;
}
/* 2 bytes */
utxt->pos++;
utxt->buf[utxt->pos] = op_start + 3;
utxt->pos++;
/* 6 bytes */
txt_undo_store_cur(text, utxt);
/* 4 bytes */
txt_undo_store_uint32(utxt->buf, &utxt->pos, c);
/* 1 byte */
utxt->buf[utxt->pos] = op_start + 3;
}

txt_undo_end(text, utxt);
}

/* extends Link */
struct LinkInt {
struct LinkInt next, prev;
int value;
};

/**
* UnindentLines points to a #ListBase composed of #LinkInt elements, listing the numbers
* of the lines that should not be indented back.
*/
static void txt_undo_add_unprefix_op(Text *text,
TextUndoBuf *utxt,
char undo_op,
const ListBase *line_index_mask,
const int line_index_mask_len)
{
struct LinkInt *idata;

BLI_assert(BLI_listbase_count(line_index_mask) == line_index_mask_len);

/* OP byte + u32 count + counted u32 line numbers + u32 count + 12-bytes selection + OP byte. */
if (!max_undo_test(utxt, 2 + 4 + (line_index_mask_len * 4) + 4 + 12 + 1)) {
return;
}

/* 2 bytes */
utxt->pos++;
utxt->buf[utxt->pos] = undo_op;
utxt->pos++;
/* Adding number of line numbers to read
* 4 bytes */
txt_undo_store_uint32(utxt->buf, &utxt->pos, line_index_mask_len);

/* Adding line-numbers of lines that shall not be indented if undoing.
* 'line_index_mask_len * 4' bytes */
for (idata = line_index_mask->first; idata; idata = idata->next) {
txt_undo_store_uint32(utxt->buf, &utxt->pos, idata->value);
}

/* Adding number of line numbers to read again.
* 4 bytes */
txt_undo_store_uint32(utxt->buf, &utxt->pos, line_index_mask_len);
/* Adding current selection.
* 12 bytes */
txt_undo_store_cursors(text, utxt);
/* Closing with OP (same as above).
* 1 byte */
utxt->buf[utxt->pos] = undo_op;
/* Marking as last undo operation */
txt_undo_end(text, utxt);
}

static unsigned short txt_undo_read_uint16(const char undo_buf, int undo_pos)
{
unsigned short val;
val = undo_buf[*undo_pos];
(*undo_pos)--;
val = (val << 8) + undo_buf[*undo_pos];
(*undo_pos)--;
return val;
}

static unsigned int txt_undo_read_uint32(const char undo_buf, int undo_pos)
{
unsigned int val;
val = undo_buf[*undo_pos];
(*undo_pos)--;
val = (val << 8) + undo_buf[*undo_pos];
(*undo_pos)--;
val = (val << 8) + undo_buf[*undo_pos];
(*undo_pos)--;
val = (val << 8) + undo_buf[*undo_pos];
(*undo_pos)--;
return val;
}

/* read the cur cursor from the undo buffer */
static void txt_undo_read_cur(const char *undo_buf,
int *undo_pos,
unsigned int *curln,
unsigned short *curc)
{
*curln = txt_undo_read_uint32(undo_buf, undo_pos);
*curc = txt_undo_read_uint16(undo_buf, undo_pos);
}

/* read the sel cursor from the undo buffer */
static void txt_undo_read_sel(const char *undo_buf,
int *undo_pos,
unsigned int *selln,
unsigned short *selc)
{
*selln = txt_undo_read_uint32(undo_buf, undo_pos);
*selc = txt_undo_read_uint16(undo_buf, undo_pos);
}

/* read both cursors from the undo buffer */
static void txt_undo_read_cursors(const char *undo_buf,
int *undo_pos,
unsigned int *curln,
unsigned short *curc,
unsigned int *selln,
unsigned short *selc)
{
txt_undo_read_sel(undo_buf, undo_pos, selln, selc);
txt_undo_read_cur(undo_buf, undo_pos, curln, curc);
}

static unsigned int txt_undo_read_unicode(const char undo_buf, int undo_pos, short bytes)
{
unsigned int unicode;
char utf8[BLI_UTF8_MAX + 1];

switch (bytes) {
case 1: /* ascii */
unicode = undo_buf[*undo_pos];
(*undo_pos)--;
break;
case 2: /* 2-byte symbol */
utf8[2] = '\0';
utf8[1] = undo_buf[*undo_pos];
(*undo_pos)--;
utf8[0] = undo_buf[*undo_pos];
(*undo_pos)--;
unicode = BLI_str_utf8_as_unicode(utf8);
break;
case 3: /* 3-byte symbol */
utf8[3] = '\0';
utf8[2] = undo_buf[*undo_pos];
(*undo_pos)--;
utf8[1] = undo_buf[*undo_pos];
(*undo_pos)--;
utf8[0] = undo_buf[*undo_pos];
(*undo_pos)--;
unicode = BLI_str_utf8_as_unicode(utf8);
break;
case 4: /* 32-bit unicode symbol */
unicode = txt_undo_read_uint32(undo_buf, undo_pos);
break;
default:
/* should never happen */
BLI_assert(0);
unicode = 0;
break;
}

return unicode;
}

static unsigned short txt_redo_read_uint16(const char undo_buf, int undo_pos)
{
unsigned short val;
val = undo_buf[*undo_pos];
(*undo_pos)++;
val = val + (undo_buf[*undo_pos] << 8);
(*undo_pos)++;
return val;
}

static unsigned int txt_redo_read_uint32(const char undo_buf, int undo_pos)
{
unsigned int val;
val = undo_buf[*undo_pos];
(*undo_pos)++;
val = val + (undo_buf[*undo_pos] << 8);
(*undo_pos)++;
val = val + (undo_buf[*undo_pos] << 16);
(*undo_pos)++;
val = val + (undo_buf[*undo_pos] << 24);
(*undo_pos)++;
return val;
}

/* redo read cur cursor from the undo buffer */
static void txt_redo_read_cur(const char *undo_buf,
int *undo_pos,
unsigned int *curln,
unsigned short *curc)
{
*curc = txt_redo_read_uint16(undo_buf, undo_pos);
*curln = txt_redo_read_uint32(undo_buf, undo_pos);
}

/* redo read sel cursor from the undo buffer */
static void txt_redo_read_sel(const char *undo_buf,
int *undo_pos,
unsigned int *selln,
unsigned short *selc)
{
*selc = txt_redo_read_uint16(undo_buf, undo_pos);
*selln = txt_redo_read_uint32(undo_buf, undo_pos);
}

/* redo read both cursors from the undo buffer */
static void txt_redo_read_cursors(const char *undo_buf,
int *undo_pos,
unsigned int *curln,
unsigned short *curc,
unsigned int *selln,
unsigned short *selc)
{
txt_redo_read_cur(undo_buf, undo_pos, curln, curc);
txt_redo_read_sel(undo_buf, undo_pos, selln, selc);
}

static unsigned int txt_redo_read_unicode(const char undo_buf, int undo_pos, short bytes)
{
unsigned int unicode;
char utf8[BLI_UTF8_MAX + 1];

switch (bytes) {
case 1: /* ascii */
unicode = undo_buf[*undo_pos];
(*undo_pos)++;
break;
case 2: /* 2-byte symbol */
utf8[0] = undo_buf[*undo_pos];
(*undo_pos)++;
utf8[1] = undo_buf[*undo_pos];
(*undo_pos)++;
utf8[2] = '\0';
unicode = BLI_str_utf8_as_unicode(utf8);
break;
case 3: /* 3-byte symbol */
utf8[0] = undo_buf[*undo_pos];
(*undo_pos)++;
utf8[1] = undo_buf[*undo_pos];
(*undo_pos)++;
utf8[2] = undo_buf[*undo_pos];
(*undo_pos)++;
utf8[3] = '\0';
unicode = BLI_str_utf8_as_unicode(utf8);
break;
case 4: /* 32-bit unicode symbol */
unicode = txt_redo_read_uint32(undo_buf, undo_pos);
break;
default:
/* should never happen */
BLI_assert(0);
unicode = 0;
break;
}

return unicode;
}

void txt_do_undo(Text text, TextUndoBuf utxt)
{
int op = utxt->buf[utxt->pos];
int prev_flags;
unsigned int linep;
unsigned int uni_char;
unsigned int curln, selln;
unsigned short curc, selc;
unsigned short charp;
char *buf;

if (utxt->pos < 0) {
return;
}

utxt->pos--;

undoing = 1;

switch (op) {
case UNDO_INSERT_1:
case UNDO_INSERT_2:
case UNDO_INSERT_3:
case UNDO_INSERT_4:
utxt->pos -= op - UNDO_INSERT_1 + 1;

/* get and restore the cursors */
txt_undo_read_cur(utxt->buf, &utxt->pos, &curln, &curc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, curln, curc, 1);

txt_delete_char(text, utxt);

utxt->pos--;
break;

case UNDO_BS_1:
case UNDO_BS_2:
case UNDO_BS_3:
case UNDO_BS_4:
charp = op - UNDO_BS_1 + 1;
uni_char = txt_undo_read_unicode(utxt->buf, &utxt->pos, charp);

/* get and restore the cursors */
txt_undo_read_cur(utxt->buf, &utxt->pos, &curln, &curc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, curln, curc, 1);

txt_add_char(text, utxt, uni_char);

utxt->pos--;
break;

case UNDO_DEL_1:
case UNDO_DEL_2:
case UNDO_DEL_3:
case UNDO_DEL_4:
charp = op - UNDO_DEL_1 + 1;
uni_char = txt_undo_read_unicode(utxt->buf, &utxt->pos, charp);

/* get and restore the cursors */
txt_undo_read_cur(utxt->buf, &utxt->pos, &curln, &curc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, curln, curc, 1);

txt_add_char(text, utxt, uni_char);

txt_move_left(text, 0);

utxt->pos--;
break;

case UNDO_DBLOCK: {
int i;
/* length of the string in the buffer */
linep = txt_undo_read_uint32(utxt->buf, &utxt->pos);

buf = MEM_mallocN(linep + 1, "dblock buffer");
for (i = 0; i < linep; i++) {
buf[(linep - 1) - i] = utxt->buf[utxt->pos];
utxt->pos--;
}
buf[i] = 0;

/* skip over the length that was stored again */
utxt->pos -= 4;

/* Get the cursor positions */
txt_undo_read_cursors(utxt->buf, &utxt->pos, &curln, &curc, &selln, &selc);

/* move cur to location that needs buff inserted */
txt_move_to(text, curln, curc, 0);

txt_insert_buf(text, utxt, buf);
MEM_freeN(buf);

/* restore the cursors */
txt_move_to(text, curln, curc, 0);
txt_move_to(text, selln, selc, 1);

utxt->pos--;

break;
}
case UNDO_IBLOCK: {
int i;
/* length of the string in the buffer */
linep = txt_undo_read_uint32(utxt->buf, &utxt->pos);

/* txt_backspace_char removes utf8-characters, not bytes */
buf = MEM_mallocN(linep + 1, "iblock buffer");
for (i = 0; i < linep; i++) {
buf[(linep - 1) - i] = utxt->buf[utxt->pos];
utxt->pos--;
}
buf[i] = 0;
linep = BLI_strlen_utf8(buf);
MEM_freeN(buf);

/* skip over the length that was stored again */
utxt->pos -= 4;

/* get and restore the cursors */
txt_undo_read_cursors(utxt->buf, &utxt->pos, &curln, &curc, &selln, &selc);

txt_move_to(text, curln, curc, 0);
txt_move_to(text, selln, selc, 1);

if ((curln == selln) && (curc == selc)) {
/* disable tabs to spaces since moving right may involve skipping multiple spaces */
prev_flags = text->flags;
text->flags &= ~TXT_TABSTOSPACES;

for (i = 0; i < linep; i++) {
txt_move_right(text, 1);
}

text->flags = prev_flags;
}

txt_delete_selected(text, utxt);

utxt->pos--;
break;
}
case UNDO_INDENT:
case UNDO_COMMENT:
case UNDO_DUPLICATE:
case UNDO_MOVE_LINES_UP:
case UNDO_MOVE_LINES_DOWN:
/* get and restore the cursors */
txt_undo_read_cursors(utxt->buf, &utxt->pos, &curln, &curc, &selln, &selc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, selln, selc, 1);

if (op == UNDO_INDENT) {
txt_unindent(text, utxt);
}
else if (op == UNDO_COMMENT) {
txt_uncomment(text, utxt);
}
else if (op == UNDO_DUPLICATE) {
txt_delete_line(text, text->curl->next);
}
else if (op == UNDO_MOVE_LINES_UP) {
txt_move_lines(text, utxt, TXT_MOVE_LINE_DOWN);
}
else if (op == UNDO_MOVE_LINES_DOWN) {
txt_move_lines(text, utxt, TXT_MOVE_LINE_UP);
}

utxt->pos--;
break;
case UNDO_UNINDENT:
case UNDO_UNCOMMENT: {
void (txt_prefix_fn)(Text , TextUndoBuf *);
void (txt_unprefix_fn)(Text , TextUndoBuf *);
int count;
int i;
/* Get and restore the cursors */
txt_undo_read_cursors(utxt->buf, &utxt->pos, &curln, &curc, &selln, &selc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, selln, selc, 1);

/* Un-unindent */
if (op == UNDO_UNINDENT) {
txt_prefix_fn = txt_indent;
txt_unprefix_fn = txt_unindent;
}
else {
txt_prefix_fn = txt_comment;
txt_unprefix_fn = txt_uncomment;
}

txt_prefix_fn(text, utxt);

/* Get the count */
count = txt_undo_read_uint32(utxt->buf, &utxt->pos);
/* Iterate! */
txt_pop_sel(text);

for (i = 0; i < count; i++) {
txt_move_to(text, txt_undo_read_uint32(utxt->buf, &utxt->pos), 0, 0);
/* Un-un-unindent/comment */
txt_unprefix_fn(text, utxt);
}
/* Restore selection */
txt_move_to(text, curln, curc, 0);
txt_move_to(text, selln, selc, 1);
/* Jumo over count */
txt_undo_read_uint32(utxt->buf, &utxt->pos);
/* Jump over closing OP byte */
utxt->pos--;
break;
}
default:
// XXX error("Undo buffer error - resetting");
utxt->pos = -1;

break;
}

undoing = 0;
}

void txt_do_redo(Text text, TextUndoBuf utxt)
{
char op;
char *buf;
unsigned int linep;
unsigned short charp;
unsigned int uni_uchar;
unsigned int curln, selln;
unsigned short curc, selc;

utxt->pos++;
op = utxt->buf[utxt->pos];

if (!op) {
utxt->pos--;
return;
}

undoing = 1;

switch (op) {
case UNDO_INSERT_1:
case UNDO_INSERT_2:
case UNDO_INSERT_3:
case UNDO_INSERT_4:
utxt->pos++;

/* get and restore the cursors */
txt_redo_read_cur(utxt->buf, &utxt->pos, &curln, &curc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, curln, curc, 1);

charp = op - UNDO_INSERT_1 + 1;
uni_uchar = txt_redo_read_unicode(utxt->buf, &utxt->pos, charp);

txt_add_char(text, utxt, uni_uchar);
break;

case UNDO_BS_1:
case UNDO_BS_2:
case UNDO_BS_3:
case UNDO_BS_4:
utxt->pos++;

/* get and restore the cursors */
txt_redo_read_cur(utxt->buf, &utxt->pos, &curln, &curc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, curln, curc, 1);

utxt->pos += op - UNDO_BS_1 + 1;

/* move right so we backspace the correct char */
txt_move_right(text, 0);
txt_backspace_char(text, utxt);

break;

case UNDO_DEL_1:
case UNDO_DEL_2:
case UNDO_DEL_3:
case UNDO_DEL_4:
utxt->pos++;

/* get and restore the cursors */
txt_redo_read_cur(utxt->buf, &utxt->pos, &curln, &curc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, curln, curc, 1);

utxt->pos += op - UNDO_DEL_1 + 1;

txt_delete_char(text, utxt);

break;

case UNDO_DBLOCK:
utxt->pos++;

/* get and restore the cursors */
txt_redo_read_cursors(utxt->buf, &utxt->pos, &curln, &curc, &selln, &selc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, selln, selc, 1);

/* length of the block */
linep = txt_redo_read_uint32(utxt->buf, &utxt->pos);

utxt->pos += linep;

/* skip over the length that was stored again */
utxt->pos += 4;

txt_delete_sel(text, utxt);

break;

case UNDO_IBLOCK:
utxt->pos++;

/* get and restore the cursors */
txt_redo_read_cursors(utxt->buf, &utxt->pos, &curln, &curc, &selln, &selc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, curln, curc, 1);

/* length of the block */
linep = txt_redo_read_uint32(utxt->buf, &utxt->pos);

buf = MEM_mallocN(linep + 1, "iblock buffer");
memcpy(buf, &utxt->buf[utxt->pos], linep);
utxt->pos += linep;
buf[linep] = 0;

txt_insert_buf(text, utxt, buf);
MEM_freeN(buf);

/* skip over the length that was stored again */
utxt->pos += 4;

break;

case UNDO_INDENT:
case UNDO_COMMENT:
case UNDO_UNCOMMENT:
case UNDO_DUPLICATE:
case UNDO_MOVE_LINES_UP:
case UNDO_MOVE_LINES_DOWN:
utxt->pos++;

/* get and restore the cursors */
txt_redo_read_cursors(utxt->buf, &utxt->pos, &curln, &curc, &selln, &selc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, selln, selc, 1);

if (op == UNDO_INDENT) {
txt_indent(text, utxt);
}
else if (op == UNDO_COMMENT) {
txt_comment(text, utxt);
}
else if (op == UNDO_UNCOMMENT) {
txt_uncomment(text, utxt);
}
else if (op == UNDO_DUPLICATE) {
txt_duplicate_line(text, utxt);
}
else if (op == UNDO_MOVE_LINES_UP) {
/* offset the cursor by + 1 */
txt_move_to(text, curln + 1, curc, 0);
txt_move_to(text, selln + 1, selc, 1);

txt_move_lines(text, utxt, TXT_MOVE_LINE_UP);
}
else if (op == UNDO_MOVE_LINES_DOWN) {
/* offset the cursor by - 1 */
txt_move_to(text, curln - 1, curc, 0);
txt_move_to(text, selln - 1, selc, 1);

txt_move_lines(text, utxt, TXT_MOVE_LINE_DOWN);
}

/* re-restore the cursors since they got moved when redoing */
txt_move_to(text, curln, curc, 0);
txt_move_to(text, selln, selc, 1);

break;
case UNDO_UNINDENT: {
int count;
int i;

utxt->pos++;
/* Scan all the stuff described in txt_undo_add_unindent_op */
count = txt_redo_read_uint32(utxt->buf, &utxt->pos);
for (i = 0; i < count; i++) {
txt_redo_read_uint32(utxt->buf, &utxt->pos);
}
/* Count again */
txt_redo_read_uint32(utxt->buf, &utxt->pos);
/* Get the selection and re-unindent */
txt_redo_read_cursors(utxt->buf, &utxt->pos, &curln, &curc, &selln, &selc);
txt_move_to(text, curln, curc, 0);
txt_move_to(text, selln, selc, 1);
txt_unindent(text, utxt);
break;
}
default:
// XXX error("Undo buffer error - resetting");
utxt->pos = -1;

break;
}

undoing = 0;
}		}

/**************************/		/**************************/
/* Line editing functions */		/* Line editing functions */
/**************************/		/**************************/

void txt_split_curline(Text text, TextUndoBuf utxt)		void txt_split_curline(Text *text)
{		{
TextLine *ins;		TextLine *ins;
char left, right;		char left, right;

if (!text->curl) {		if (!text->curl) {
return;		return;
}		}

txt_delete_sel(text, utxt);		txt_delete_sel(text);

if (!undoing) {
txt_undo_add_charop(text, utxt, UNDO_INSERT_1, '\n');
}

/* Make the two half strings */		/* Make the two half strings */

left = MEM_mallocN(text->curc + 1, "textline_string");		left = MEM_mallocN(text->curc + 1, "textline_string");
if (text->curc) {		if (text->curc) {
memcpy(left, text->curl->line, text->curc);		memcpy(left, text->curl->line, text->curc);
}		}
left[text->curc] = 0;		left[text->curc] = 0;
▲ Show 20 Lines • Show All 66 Lines • ▼ Show 20 Lines	static void txt_combine_lines(Text text, TextLine linea, TextLine *lineb)
make_new_line(linea, tmp);		make_new_line(linea, tmp);

txt_delete_line(text, lineb);		txt_delete_line(text, lineb);

txt_make_dirty(text);		txt_make_dirty(text);
txt_clean_text(text);		txt_clean_text(text);
}		}

void txt_duplicate_line(Text text, TextUndoBuf utxt)		void txt_duplicate_line(Text *text)
{		{
TextLine *textline;		TextLine *textline;

if (!text->curl) {		if (!text->curl) {
return;		return;
}		}

if (text->curl == text->sell) {		if (text->curl == text->sell) {
textline = txt_new_line(text->curl->line);		textline = txt_new_line(text->curl->line);
BLI_insertlinkafter(&text->lines, text->curl, textline);		BLI_insertlinkafter(&text->lines, text->curl, textline);

txt_make_dirty(text);		txt_make_dirty(text);
txt_clean_text(text);		txt_clean_text(text);

if (!undoing) {
txt_undo_add_op(text, utxt, UNDO_DUPLICATE);
}
}		}
}		}

void txt_delete_char(Text text, TextUndoBuf utxt)		void txt_delete_char(Text *text)
{		{
unsigned int c = '\n';		unsigned int c = '\n';

if (!text->curl) {		if (!text->curl) {
return;		return;
}		}

if (txt_has_sel(text)) { /* deleting a selection */		if (txt_has_sel(text)) { /* deleting a selection */
txt_delete_sel(text, utxt);		txt_delete_sel(text);
txt_make_dirty(text);		txt_make_dirty(text);
return;		return;
}		}
else if (text->curc == text->curl->len) { /* Appending two lines */		else if (text->curc == text->curl->len) { /* Appending two lines */
if (text->curl->next) {		if (text->curl->next) {
txt_combine_lines(text, text->curl, text->curl->next);		txt_combine_lines(text, text->curl, text->curl->next);
txt_pop_sel(text);		txt_pop_sel(text);
}		}
else {		else {
return;		return;
}		}
}		}
else { /* Just deleting a char */		else { /* Just deleting a char */
size_t c_len = 0;		size_t c_len = 0;
c = BLI_str_utf8_as_unicode_and_size(text->curl->line + text->curc, &c_len);		c = BLI_str_utf8_as_unicode_and_size(text->curl->line + text->curc, &c_len);
		UNUSED_VARS(c);

memmove(text->curl->line + text->curc,		memmove(text->curl->line + text->curc,
text->curl->line + text->curc + c_len,		text->curl->line + text->curc + c_len,
text->curl->len - text->curc - c_len + 1);		text->curl->len - text->curc - c_len + 1);

text->curl->len -= c_len;		text->curl->len -= c_len;

txt_pop_sel(text);		txt_pop_sel(text);
}		}

txt_make_dirty(text);		txt_make_dirty(text);
txt_clean_text(text);		txt_clean_text(text);

if (!undoing) {
txt_undo_add_charop(text, utxt, UNDO_DEL_1, c);
}
}		}

void txt_delete_word(Text text, TextUndoBuf utxt)		void txt_delete_word(Text *text)
{		{
txt_jump_right(text, true, true);		txt_jump_right(text, true, true);
txt_delete_sel(text, utxt);		txt_delete_sel(text);
txt_make_dirty(text);		txt_make_dirty(text);
}		}

void txt_backspace_char(Text text, TextUndoBuf utxt)		void txt_backspace_char(Text *text)
{		{
unsigned int c = '\n';		unsigned int c = '\n';

if (!text->curl) {		if (!text->curl) {
return;		return;
}		}

if (txt_has_sel(text)) { /* deleting a selection */		if (txt_has_sel(text)) { /* deleting a selection */
txt_delete_sel(text, utxt);		txt_delete_sel(text);
txt_make_dirty(text);		txt_make_dirty(text);
return;		return;
}		}
else if (text->curc == 0) { /* Appending two lines */		else if (text->curc == 0) { /* Appending two lines */
if (!text->curl->prev) {		if (!text->curl->prev) {
return;		return;
}		}

text->curl = text->curl->prev;		text->curl = text->curl->prev;
text->curc = text->curl->len;		text->curc = text->curl->len;

txt_combine_lines(text, text->curl, text->curl->next);		txt_combine_lines(text, text->curl, text->curl->next);
txt_pop_sel(text);		txt_pop_sel(text);
}		}
else { /* Just backspacing a char */		else { /* Just backspacing a char */
size_t c_len = 0;		size_t c_len = 0;
const char *prev = BLI_str_prev_char_utf8(text->curl->line + text->curc);		const char *prev = BLI_str_prev_char_utf8(text->curl->line + text->curc);
c = BLI_str_utf8_as_unicode_and_size(prev, &c_len);		c = BLI_str_utf8_as_unicode_and_size(prev, &c_len);
		UNUSED_VARS(c);

/* source and destination overlap, don't use memcpy() */		/* source and destination overlap, don't use memcpy() */
memmove(text->curl->line + text->curc - c_len,		memmove(text->curl->line + text->curc - c_len,
text->curl->line + text->curc,		text->curl->line + text->curc,
text->curl->len - text->curc + 1);		text->curl->len - text->curc + 1);

text->curl->len -= c_len;		text->curl->len -= c_len;
text->curc -= c_len;		text->curc -= c_len;

txt_pop_sel(text);		txt_pop_sel(text);
}		}

txt_make_dirty(text);		txt_make_dirty(text);
txt_clean_text(text);		txt_clean_text(text);

if (!undoing) {
txt_undo_add_charop(text, utxt, UNDO_BS_1, c);
}
}		}

void txt_backspace_word(Text text, TextUndoBuf utxt)		void txt_backspace_word(Text *text)
{		{
txt_jump_left(text, true, true);		txt_jump_left(text, true, true);
txt_delete_sel(text, utxt);		txt_delete_sel(text);
txt_make_dirty(text);		txt_make_dirty(text);
}		}

/* Max spaces to replace a tab with, currently hardcoded to TXT_TABSIZE = 4.		/* Max spaces to replace a tab with, currently hardcoded to TXT_TABSIZE = 4.
* Used by txt_convert_tab_to_spaces, indent and unindent.		* Used by txt_convert_tab_to_spaces, indent and unindent.
* Remember to change this string according to max tab size */		* Remember to change this string according to max tab size */
static char tab_to_spaces[] = " ";		static char tab_to_spaces[] = " ";

static void txt_convert_tab_to_spaces(Text text, TextUndoBuf utxt)		static void txt_convert_tab_to_spaces(Text *text)
{		{
/* sb aims to pad adjust the tab-width needed so that the right number of spaces		/* sb aims to pad adjust the tab-width needed so that the right number of spaces
* is added so that the indention of the line is the right width (i.e. aligned		* is added so that the indention of the line is the right width (i.e. aligned
* to multiples of TXT_TABSIZE)		* to multiples of TXT_TABSIZE)
*/		*/
const char *sb = &tab_to_spaces[text->curc % TXT_TABSIZE];		const char *sb = &tab_to_spaces[text->curc % TXT_TABSIZE];
txt_insert_buf(text, utxt, sb);		txt_insert_buf(text, sb);
}		}

static bool txt_add_char_intern(Text text, TextUndoBuf utxt, unsigned int add, bool replace_tabs)		static bool txt_add_char_intern(Text *text, unsigned int add, bool replace_tabs)
{		{
char *tmp, ch[BLI_UTF8_MAX];		char *tmp, ch[BLI_UTF8_MAX];
size_t add_len;		size_t add_len;

if (!text->curl) {		if (!text->curl) {
return 0;		return 0;
}		}

if (add == '\n') {		if (add == '\n') {
txt_split_curline(text, utxt);		txt_split_curline(text);
return true;		return true;
}		}

/* insert spaces rather than tabs */		/* insert spaces rather than tabs */
if (add == '\t' && replace_tabs) {		if (add == '\t' && replace_tabs) {
txt_convert_tab_to_spaces(text, utxt);		txt_convert_tab_to_spaces(text);
return true;		return true;
}		}

txt_delete_sel(text, utxt);		txt_delete_sel(text);

if (!undoing) {
txt_undo_add_charop(text, utxt, UNDO_INSERT_1, add);
}

add_len = BLI_str_utf8_from_unicode(add, ch);		add_len = BLI_str_utf8_from_unicode(add, ch);

tmp = MEM_mallocN(text->curl->len + add_len + 1, "textline_string");		tmp = MEM_mallocN(text->curl->len + add_len + 1, "textline_string");

memcpy(tmp, text->curl->line, text->curc);		memcpy(tmp, text->curl->line, text->curc);
memcpy(tmp + text->curc, ch, add_len);		memcpy(tmp + text->curc, ch, add_len);
memcpy(		memcpy(
tmp + text->curc + add_len, text->curl->line + text->curc, text->curl->len - text->curc + 1);		tmp + text->curc + add_len, text->curl->line + text->curc, text->curl->len - text->curc + 1);

make_new_line(text->curl, tmp);		make_new_line(text->curl, tmp);

text->curc += add_len;		text->curc += add_len;

txt_pop_sel(text);		txt_pop_sel(text);

txt_make_dirty(text);		txt_make_dirty(text);
txt_clean_text(text);		txt_clean_text(text);

return 1;		return 1;
}		}

bool txt_add_char(Text text, TextUndoBuf utxt, unsigned int add)		bool txt_add_char(Text *text, unsigned int add)
{		{
return txt_add_char_intern(text, utxt, add, (text->flags & TXT_TABSTOSPACES) != 0);		return txt_add_char_intern(text, add, (text->flags & TXT_TABSTOSPACES) != 0);
}		}

bool txt_add_raw_char(Text text, TextUndoBuf utxt, unsigned int add)		bool txt_add_raw_char(Text *text, unsigned int add)
{		{
return txt_add_char_intern(text, utxt, add, 0);		return txt_add_char_intern(text, add, 0);
}		}

void txt_delete_selected(Text text, TextUndoBuf utxt)		void txt_delete_selected(Text *text)
{		{
txt_delete_sel(text, utxt);		txt_delete_sel(text);
txt_make_dirty(text);		txt_make_dirty(text);
}		}

bool txt_replace_char(Text text, TextUndoBuf utxt, unsigned int add)		bool txt_replace_char(Text *text, unsigned int add)
{		{
unsigned int del;		unsigned int del;
size_t del_size = 0, add_size;		size_t del_size = 0, add_size;
char ch[BLI_UTF8_MAX];		char ch[BLI_UTF8_MAX];

if (!text->curl) {		if (!text->curl) {
return false;		return false;
}		}

/* If text is selected or we're at the end of the line just use txt_add_char */		/* If text is selected or we're at the end of the line just use txt_add_char */
if (text->curc == text->curl->len \|\| txt_has_sel(text) \|\| add == '\n') {		if (text->curc == text->curl->len \|\| txt_has_sel(text) \|\| add == '\n') {
return txt_add_char(text, utxt, add);		return txt_add_char(text, add);
}		}

del = BLI_str_utf8_as_unicode_and_size(text->curl->line + text->curc, &del_size);		del = BLI_str_utf8_as_unicode_and_size(text->curl->line + text->curc, &del_size);
		UNUSED_VARS(del);
add_size = BLI_str_utf8_from_unicode(add, ch);		add_size = BLI_str_utf8_from_unicode(add, ch);

if (add_size > del_size) {		if (add_size > del_size) {
char *tmp = MEM_mallocN(text->curl->len + add_size - del_size + 1, "textline_string");		char *tmp = MEM_mallocN(text->curl->len + add_size - del_size + 1, "textline_string");
memcpy(tmp, text->curl->line, text->curc);		memcpy(tmp, text->curl->line, text->curc);
memcpy(tmp + text->curc + add_size,		memcpy(tmp + text->curc + add_size,
text->curl->line + text->curc + del_size,		text->curl->line + text->curc + del_size,
text->curl->len - text->curc - del_size + 1);		text->curl->len - text->curc - del_size + 1);
Show All 9 Lines	bool txt_replace_char(Text *text, unsigned int add)

memcpy(text->curl->line + text->curc, ch, add_size);		memcpy(text->curl->line + text->curc, ch, add_size);
text->curc += add_size;		text->curc += add_size;
text->curl->len += add_size - del_size;		text->curl->len += add_size - del_size;

txt_pop_sel(text);		txt_pop_sel(text);
txt_make_dirty(text);		txt_make_dirty(text);
txt_clean_text(text);		txt_clean_text(text);

/* Should probably create a new op for this */
if (!undoing) {
txt_undo_add_charop(text, utxt, UNDO_INSERT_1, add);
text->curc -= add_size;
txt_pop_sel(text);
txt_undo_add_charop(text, utxt, UNDO_DEL_1, del);
text->curc += add_size;
txt_pop_sel(text);
}
return true;		return true;
}		}

/**		/**
* Generic prefix operation, use for comment & indent.		* Generic prefix operation, use for comment & indent.
*		*
* \note caller must handle undo.		* \note caller must handle undo.
*/		*/
▲ Show 20 Lines • Show All 62 Lines • ▼ Show 20 Lines
/**		/**
* Generic un-prefix operation, use for comment & indent.		* Generic un-prefix operation, use for comment & indent.
*		*
* \param r_line_index_mask: List of lines that are already at indent level 0,		* \param r_line_index_mask: List of lines that are already at indent level 0,
* to store them later into the undo buffer.		* to store them later into the undo buffer.
*		*
* \note caller must handle undo.		* \note caller must handle undo.
*/		*/
static void txt_select_unprefix(Text *text,		static void txt_select_unprefix(Text text, const char remove)
const char *remove,
ListBase *r_line_index_mask,
int *r_line_index_mask_len)
{		{
int num = 0;		int num = 0;
const int indentlen = strlen(remove);		const int indentlen = strlen(remove);
bool unindented_first = false;		bool unindented_first = false;

int curl_span_init = 0;

BLI_assert(!ELEM(NULL, text->curl, text->sell));		BLI_assert(!ELEM(NULL, text->curl, text->sell));

BLI_listbase_clear(r_line_index_mask);
*r_line_index_mask_len = 0;

if (!undoing) {
curl_span_init = txt_get_span(text->lines.first, text->curl);
}

while (true) {		while (true) {
bool changed = false;		bool changed = false;
if (STREQLEN(text->curl->line, remove, indentlen)) {		if (STREQLEN(text->curl->line, remove, indentlen)) {
if (num == 0) {		if (num == 0) {
unindented_first = true;		unindented_first = true;
}		}
text->curl->len -= indentlen;		text->curl->len -= indentlen;
memmove(text->curl->line, text->curl->line + indentlen, text->curl->len + 1);		memmove(text->curl->line, text->curl->line + indentlen, text->curl->len + 1);
changed = true;		changed = true;
}		}
else {
if (!undoing) {
/* Create list element for 0 indent line */
struct LinkInt *idata = MEM_mallocN(sizeof(struct LinkInt), __func__);
idata->value = curl_span_init + num;
BLI_assert(idata->value == txt_get_span(text->lines.first, text->curl));
BLI_addtail(r_line_index_mask, idata);
(*r_line_index_mask_len) += 1;
}
}

txt_make_dirty(text);		txt_make_dirty(text);
txt_clean_text(text);		txt_clean_text(text);

if (text->curl == text->sell) {		if (text->curl == text->sell) {
if (changed) {		if (changed) {
text->selc = MAX2(text->selc - indentlen, 0);		text->selc = MAX2(text->selc - indentlen, 0);
}		}
Show All 12 Lines	static void txt_select_unprefix(Text text, const char remove)
while (num > 0) {		while (num > 0) {
text->curl = text->curl->prev;		text->curl = text->curl->prev;
num--;		num--;
}		}

/* caller must handle undo */		/* caller must handle undo */
}		}

void txt_comment(Text text, TextUndoBuf utxt)		void txt_comment(Text *text)
{		{
const char *prefix = "#";		const char *prefix = "#";

if (ELEM(NULL, text->curl, text->sell)) {		if (ELEM(NULL, text->curl, text->sell)) {
return;		return;
}		}

txt_select_prefix(text, prefix);		txt_select_prefix(text, prefix);

if (!undoing) {
txt_undo_add_op(text, utxt, UNDO_COMMENT);
}
}		}

void txt_uncomment(Text text, TextUndoBuf utxt)		void txt_uncomment(Text *text)
{		{
const char *prefix = "#";		const char *prefix = "#";
ListBase line_index_mask;
int line_index_mask_len;

if (ELEM(NULL, text->curl, text->sell)) {		if (ELEM(NULL, text->curl, text->sell)) {
return;		return;
}		}

txt_select_unprefix(text, prefix, &line_index_mask, &line_index_mask_len);		txt_select_unprefix(text, prefix);

if (!undoing) {
txt_undo_add_unprefix_op(text, utxt, UNDO_UNCOMMENT, &line_index_mask, line_index_mask_len);
}		}

BLI_freelistN(&line_index_mask);		void txt_indent(Text *text)
}

void txt_indent(Text text, TextUndoBuf utxt)
{		{
const char *prefix = (text->flags & TXT_TABSTOSPACES) ? tab_to_spaces : "\t";		const char *prefix = (text->flags & TXT_TABSTOSPACES) ? tab_to_spaces : "\t";

if (ELEM(NULL, text->curl, text->sell)) {		if (ELEM(NULL, text->curl, text->sell)) {
return;		return;
}		}

txt_select_prefix(text, prefix);		txt_select_prefix(text, prefix);

if (!undoing) {
txt_undo_add_op(text, utxt, UNDO_INDENT);
}
}		}

void txt_unindent(Text text, TextUndoBuf utxt)		void txt_unindent(Text *text)
{		{
const char *prefix = (text->flags & TXT_TABSTOSPACES) ? tab_to_spaces : "\t";		const char *prefix = (text->flags & TXT_TABSTOSPACES) ? tab_to_spaces : "\t";
ListBase line_index_mask;
int line_index_mask_len;

if (ELEM(NULL, text->curl, text->sell)) {		if (ELEM(NULL, text->curl, text->sell)) {
return;		return;
}		}

txt_select_unprefix(text, prefix, &line_index_mask, &line_index_mask_len);		txt_select_unprefix(text, prefix);

if (!undoing) {
txt_undo_add_unprefix_op(text, utxt, UNDO_UNINDENT, &line_index_mask, line_index_mask_len);
}

BLI_freelistN(&line_index_mask);
}		}

void txt_move_lines(struct Text text, TextUndoBuf utxt, const int direction)		void txt_move_lines(struct Text *text, const int direction)
{		{
TextLine *line_other;		TextLine *line_other;

BLI_assert(ELEM(direction, TXT_MOVE_LINE_UP, TXT_MOVE_LINE_DOWN));		BLI_assert(ELEM(direction, TXT_MOVE_LINE_UP, TXT_MOVE_LINE_DOWN));

if (!text->curl \|\| !text->sell) {		if (!text->curl \|\| !text->sell) {
return;		return;
}		}
Show All 12 Lines	if (direction == TXT_MOVE_LINE_DOWN) {
BLI_insertlinkbefore(&text->lines, text->curl, line_other);		BLI_insertlinkbefore(&text->lines, text->curl, line_other);
}		}
else {		else {
BLI_insertlinkafter(&text->lines, text->sell, line_other);		BLI_insertlinkafter(&text->lines, text->sell, line_other);
}		}

txt_make_dirty(text);		txt_make_dirty(text);
txt_clean_text(text);		txt_clean_text(text);

if (!undoing) {
txt_undo_add_op(
text, utxt, (direction == TXT_MOVE_LINE_DOWN) ? UNDO_MOVE_LINES_DOWN : UNDO_MOVE_LINES_UP);
}
}		}

int txt_setcurr_tab_spaces(Text *text, int space)		int txt_setcurr_tab_spaces(Text *text, int space)
{		{
int i = 0;		int i = 0;
int test = 0;		int test = 0;
const char *word = ":";		const char *word = ":";
const char *comm = "#";		const char *comm = "#";
▲ Show 20 Lines • Show All 176 Lines • Show Last 20 Lines