Blender V2.61 - r43446
Classes | Defines | Typedefs | Functions

text_draw.c File Reference
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#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "MEM_guardedalloc.h"
#include "BLF_api.h"
#include "BLI_blenlib.h"
#include "BLI_utildefines.h"
#include "DNA_text_types.h"
#include "DNA_space_types.h"
#include "DNA_screen_types.h"
#include "DNA_userdef_types.h"
#include "BKE_context.h"
#include "BKE_suggestions.h"
#include "BKE_text.h"
#include "BIF_gl.h"
#include "ED_datafiles.h"
#include "UI_interface.h"
#include "UI_resources.h"
#include "text_intern.h"

Go to the source code of this file.

Classes

struct  DrawCache

Defines

#define mono   blf_mono_font

Typedefs

typedef struct DrawCache DrawCache

Functions

static void text_font_begin (SpaceText *st)
static void text_font_end (SpaceText *UNUSED(st))
static int text_font_draw (SpaceText *UNUSED(st), int x, int y, const char *str)
static int text_font_draw_character (SpaceText *st, int x, int y, char c)
static int text_font_draw_character_utf8 (SpaceText *st, int x, int y, const char *c)
static void flatten_string_append (FlattenString *fs, const char *c, int accum, int len)
int flatten_string (SpaceText *st, FlattenString *fs, const char *in)
void flatten_string_free (FlattenString *fs)
static int find_builtinfunc (char *string)
static int find_specialvar (char *string)
static int find_decorator (char *string)
static int find_bool (char *string)
static int text_check_format_len (TextLine *line, unsigned int len)
static void txt_format_line (SpaceText *st, TextLine *line, int do_next)
static void format_draw_color (char formatchar)
int wrap_width (SpaceText *st, ARegion *ar)
void wrap_offset (SpaceText *st, ARegion *ar, TextLine *linein, int cursin, int *offl, int *offc)
void wrap_offset_in_line (SpaceText *st, ARegion *ar, TextLine *linein, int cursin, int *offl, int *offc)
int text_get_char_pos (SpaceText *st, const char *line, int cur)
static const char * txt_utf8_get_nth (const char *str, int n)
static int text_draw_wrapped (SpaceText *st, const char *str, int x, int y, int w, const char *format, int skip)
static int text_draw (SpaceText *st, char *str, int cshift, int maxwidth, int draw, int x, int y, const char *format)
static void text_drawcache_init (SpaceText *st)
static void text_update_drawcache (SpaceText *st, ARegion *ar)
void text_drawcache_tag_update (SpaceText *st, int full)
void text_free_caches (SpaceText *st)
static int text_get_visible_lines_no (SpaceText *st, int lineno)
int text_get_visible_lines (SpaceText *st, ARegion *ar, const char *str)
int text_get_span_wrap (SpaceText *st, ARegion *ar, TextLine *from, TextLine *to)
int text_get_total_lines (SpaceText *st, ARegion *ar)
static TextLine * first_visible_line (SpaceText *st, ARegion *ar, int *wrap_top)
static void calc_text_rcts (SpaceText *st, ARegion *ar, rcti *scroll, rcti *back)
static void draw_textscroll (SpaceText *st, rcti *scroll, rcti *back)
static void draw_markers (SpaceText *st, ARegion *ar)
static void draw_documentation (SpaceText *st, ARegion *ar)
static void draw_suggestion_list (SpaceText *st, ARegion *ar)
static void draw_cursor (SpaceText *st, ARegion *ar)
static void draw_brackets (SpaceText *st, ARegion *ar)
void draw_text_main (SpaceText *st, ARegion *ar)
void text_update_character_width (SpaceText *st)
void text_scroll_to_cursor (SpaceText *st, ScrArea *sa)
void text_update_cursor_moved (bContext *C)

Detailed Description

Definition in file text_draw.c.

Define Documentation

#define mono   blf_mono_font

Definition at line 64 of file text_draw.c.

Referenced by BKE_stamp_buf(), checker_board_text(), console_draw_string(), draw_suggestion_list(), draw_text_main(), text_font_begin(), text_font_draw(), text_font_draw_character(), text_font_draw_character_utf8(), text_update_character_width(), and textview_draw().

Typedef Documentation

typedef struct DrawCache DrawCache

Function Documentation

static void calc_text_rcts ( SpaceText *  st,
ARegion *  ar,
rcti *  scroll,
rcti *  back 
) [static]

Definition at line 1095 of file text_draw.c.

References CLAMP(), Text::curl, ListBase::first, Text::lines, MAX2, MIN2, SpaceText::pix_per_line, Text::sell, SpaceText::text, text_get_span_wrap(), text_get_total_lines(), SpaceText::top, SpaceText::txtbar, SpaceText::viewlines, ARegion::winx, ARegion::winy, rcti::xmax, rcti::xmin, rcti::ymax, and rcti::ymin.

Referenced by draw_text_main().

static void draw_brackets ( SpaceText *  st,
ARegion *  ar 
) [static]

Definition at line 1594 of file text_draw.c.

References BLI_str_prev_char_utf8(), BLI_str_utf8_size(), Text::curc, Text::curl, SpaceText::cwidth, find(), ListBase::first, TextLine::format, SpaceText::left, TextLine::len, len(), SpaceText::lheight, TextLine::line, Text::lines, TextLine::next, NULL, TextLine::prev, SpaceText::showlinenrs, SpaceText::showsyntax, stack, strlen(), SpaceText::text, text_check_bracket(), text_font_draw_character(), text_get_char_pos(), TEXTXLOC, TH_HILITE, SpaceText::top, txt_get_span(), TXT_OFFSET, txt_utf8_offset_to_index(), UI_ThemeColor(), ARegion::winy, and wrap_offset().

Referenced by draw_text_main().

static void draw_cursor ( SpaceText *  st,
ARegion *  ar 
) [static]

Definition at line 1478 of file text_draw.c.

References Text::curc, Text::curl, SpaceText::cwidth, ListBase::first, i, SpaceText::left, SpaceText::lheight, TextLine::line, SpaceText::line_hlight, Text::lines, SpaceText::overwrite, Text::selc, Text::sell, SpaceText::showlinenrs, SpaceText::tabnumber, SpaceText::text, text_get_char_pos(), text_get_visible_lines(), TEXTXLOC, TH_HILITE, TH_SHADE2, SpaceText::top, txt_get_span(), TXT_OFFSET, UI_ThemeColor(), simple_enum_gen::w, ARegion::winx, ARegion::winy, SpaceText::wordwrap, wrap_offset(), and wrap_offset_in_line().

Referenced by draw_text_main().

static void draw_documentation ( SpaceText *  st,
ARegion *  ar 
) [static]

Definition at line 1316 of file text_draw.c.

References Text::curc, Text::curl, SpaceText::cwidth, DOC_HEIGHT, DOC_WIDTH, i, SpaceText::left, SpaceText::lheight, NULL, p, TextLine::prev, SpaceText::showlinenrs, SUGG_LIST_WIDTH, SpaceText::text, text_draw(), texttool_docs_get(), texttool_suggest_first(), texttool_text_is_active(), TEXTXLOC, TH_BACK, TH_SHADE1, TH_TEXT, SpaceText::top, TXT_OFFSET, UI_ThemeColor(), and ARegion::winy.

Referenced by draw_text_main().

static void draw_markers ( SpaceText *  st,
ARegion *  ar 
) [static]

Definition at line 1232 of file text_draw.c.

References BLI_findindex(), BLI_findlink(), BLI_freelinkN(), TextMarker::color, SpaceText::cwidth, TextMarker::end, ListBase::first, first_visible_line(), i, SpaceText::left, TextLine::len, SpaceText::lheight, TextLine::line, TextMarker::lineno, Text::lines, Text::markers, TextMarker::next, next, NULL, SpaceText::showlinenrs, TextMarker::start, SpaceText::text, text_get_char_pos(), TEXTXLOC, SpaceText::top, txt_get_span(), TXT_OFFSET, SpaceText::viewlines, ARegion::winx, ARegion::winy, and wrap_offset().

Referenced by draw_text_main().

static void draw_suggestion_list ( SpaceText *  st,
ARegion *  ar 
) [static]

Definition at line 1404 of file text_draw.c.

References BLF_width(), BLI_strncpy(), Text::curc, Text::curl, SpaceText::cwidth, i, SpaceText::left, SpaceText::lheight, mono, SuggItem::next, NULL, TextLine::prev, SpaceText::showlinenrs, str, SUGG_LIST_SIZE, SUGG_LIST_WIDTH, SpaceText::text, text_draw(), text_pop_suggest_list(), texttool_suggest_first(), texttool_suggest_last(), texttool_suggest_selected(), texttool_suggest_top(), texttool_text_is_active(), TEXTXLOC, TH_BACK, TH_SHADE1, TH_SHADE2, TH_SYNTAX_B, TH_SYNTAX_L, TH_SYNTAX_N, TH_TEXT, SpaceText::top, TXT_OFFSET, UI_ThemeColor(), simple_enum_gen::w, and ARegion::winy.

Referenced by draw_text_main().

void draw_text_main ( SpaceText *  st,
ARegion *  ar 
)

Definition at line 1721 of file text_draw.c.

References BLF_fixed_width(), BLI_snprintf(), calc_text_rcts(), Text::curl, SpaceText::cwidth, draw_brackets(), draw_cursor(), draw_documentation(), draw_markers(), draw_suggestion_list(), draw_textscroll(), ListBase::first, SpaceText::flags, TextLine::format, i, ListBase::last, SpaceText::left, SpaceText::lheight, SpaceText::linenrs_tot, Text::lines, SpaceText::margin_column, MAX2, mono, TextLine::next, Text::sell, SpaceText::showlinenrs, SpaceText::showsyntax, ST_SHOW_MARGIN, SpaceText::text, text_draw(), text_draw_wrapped(), text_font_begin(), text_font_draw(), text_font_end(), text_get_visible_lines_no(), text_update_drawcache(), TEXTXLOC, TH_GRID, TH_HILITE, TH_TEXT, SpaceText::top, txt_clean_text(), txt_format_line(), TXT_OFFSET, TXT_SCROLL_WIDTH, UI_ThemeColor(), SpaceText::viewlines, ARegion::winx, ARegion::winy, and SpaceText::wordwrap.

Referenced by text_main_area_draw().

static void draw_textscroll ( SpaceText *  st,
rcti *  scroll,
rcti *  back 
) [static]

Definition at line 1208 of file text_draw.c.

References SpaceText::flags, MIN2, ST_SCROLL_SELECT, TH_BACK, TH_HILITE, bTheme::tui, SpaceText::txtbar, UI_CNR_ALL, UI_GetTheme(), UI_GetThemeColor3ubv(), UI_SCROLL_PRESSED, UI_ThemeColor(), uiRoundBox(), uiSetRoundBox(), uiWidgetScrollDraw(), ThemeUI::wcol_scroll, rcti::xmax, rcti::xmin, rcti::ymax, and rcti::ymin.

Referenced by draw_text_main().

static int find_bool ( char *  string) [static]

Definition at line 255 of file text_draw.c.

References i, and text_check_identifier().

Referenced by txt_format_line().

static int find_builtinfunc ( char *  string) [static]

Definition at line 189 of file text_draw.c.

References i, and text_check_identifier().

Referenced by txt_format_line().

static int find_decorator ( char *  string) [static]

Definition at line 243 of file text_draw.c.

References i, and text_check_identifier().

Referenced by txt_format_line().

static int find_specialvar ( char *  string) [static]

Definition at line 228 of file text_draw.c.

References i, and text_check_identifier().

Referenced by txt_format_line().

static TextLine* first_visible_line ( SpaceText *  st,
ARegion *  ar,
int *  wrap_top 
) [static]

Definition at line 1062 of file text_draw.c.

References ListBase::first, i, Text::lines, TextLine::next, SpaceText::text, text_get_visible_lines_no(), text_update_drawcache(), SpaceText::top, and SpaceText::wordwrap.

Referenced by draw_markers().

int flatten_string ( SpaceText *  st,
FlattenString *  fs,
const char *  in 
)

Definition at line 142 of file text_draw.c.

References FlattenString::accum, BLI_str_utf8_size(), FlattenString::buf, FlattenString::fixedaccum, FlattenString::fixedbuf, flatten_string_append(), i, len(), FlattenString::len, and SpaceText::tabnumber.

Referenced by text_convert_whitespace_exec(), text_draw(), text_draw_wrapped(), and txt_format_line().

static void flatten_string_append ( FlattenString *  fs,
const char *  c,
int  accum,
int  len 
) [static]

Definition at line 110 of file text_draw.c.

References FlattenString::accum, FlattenString::buf, FlattenString::fixedbuf, i, len(), FlattenString::len, MEM_callocN(), MEM_freeN(), and FlattenString::pos.

Referenced by flatten_string().

void flatten_string_free ( FlattenString *  fs)

Definition at line 174 of file text_draw.c.

References FlattenString::accum, FlattenString::buf, FlattenString::fixedaccum, FlattenString::fixedbuf, and MEM_freeN().

Referenced by text_convert_whitespace_exec(), text_draw(), text_draw_wrapped(), and txt_format_line().

static void format_draw_color ( char  formatchar) [static]

Definition at line 459 of file text_draw.c.

References TH_BACK, TH_SYNTAX_B, TH_SYNTAX_C, TH_SYNTAX_L, TH_SYNTAX_N, TH_SYNTAX_V, TH_TEXT, UI_ThemeColor(), and UI_ThemeColorBlend().

Referenced by text_draw(), and text_draw_wrapped().

static int text_check_format_len ( TextLine *  line,
unsigned int  len 
) [static]

Definition at line 275 of file text_draw.c.

References TextLine::format, MEM_freeN(), MEM_mallocN(), and strlen().

Referenced by txt_format_line().

static int text_draw ( SpaceText *  st,
char *  str,
int  cshift,
int  maxwidth,
int  draw,
int  x,
int  y,
const char *  format 
) [static]

Definition at line 757 of file text_draw.c.

References FlattenString::accum, BLI_str_utf8_size(), FlattenString::buf, SpaceText::cwidth, flatten_string(), flatten_string_free(), format_draw_color(), MIN2, SpaceText::showlinenrs, SpaceText::showsyntax, text_font_draw(), text_font_draw_character_utf8(), TEXTXLOC, TXT_OFFSET, txt_utf8_get_nth(), and simple_enum_gen::w.

Referenced by draw_documentation(), draw_suggestion_list(), draw_text_main(), and text_scroll_to_cursor().

static int text_draw_wrapped ( SpaceText *  st,
const char *  str,
int  x,
int  y,
int  w,
const char *  format,
int  skip 
) [static]

Definition at line 700 of file text_draw.c.

References BLI_str_utf8_size(), FlattenString::buf, SpaceText::cwidth, flatten_string(), flatten_string_free(), format_draw_color(), i, SpaceText::lheight, max, SpaceText::showsyntax, str, text_font_draw_character_utf8(), and txt_utf8_get_nth().

Referenced by draw_text_main().

static void text_drawcache_init ( SpaceText *  st) [static]

Definition at line 820 of file text_draw.c.

References BLI_countlist(), SpaceText::drawcache, Text::lines, MEM_callocN(), DrawCache::nlines, SpaceText::text, DrawCache::text_id, and DrawCache::winx.

Referenced by text_update_drawcache().

void text_drawcache_tag_update ( SpaceText *  st,
int  full 
)

Definition at line 935 of file text_draw.c.

References BLI_findindex(), SpaceText::drawcache, DrawCache::nlines, NULL, SpaceText::text, DrawCache::update_flag, DrawCache::valid_head, and DrawCache::valid_tail.

Referenced by ED_text_undo_step(), text_comment_exec(), text_convert_whitespace_exec(), text_cut_exec(), text_delete_exec(), text_find_and_replace(), text_indent_exec(), text_insert_exec(), text_line_break_exec(), text_listener(), text_new_exec(), text_open_exec(), text_paste_exec(), text_reload_exec(), text_uncomment_exec(), text_unindent_exec(), and text_unlink_exec().

static void text_font_begin ( SpaceText *  st) [static]

Definition at line 66 of file text_draw.c.

References BLF_size(), SpaceText::lheight, and mono.

Referenced by draw_text_main(), and text_update_character_width().

static int text_font_draw ( SpaceText *  UNUSEDst,
int  x,
int  y,
const char *  str 
) [static]

Definition at line 75 of file text_draw.c.

References BLF_draw(), BLF_DRAW_STR_DUMMY_MAX, BLF_position(), BLF_width(), and mono.

Referenced by draw_text_main(), and text_draw().

static int text_font_draw_character ( SpaceText *  st,
int  x,
int  y,
char  c 
) [static]

Definition at line 83 of file text_draw.c.

References BLF_draw(), BLF_position(), SpaceText::cwidth, mono, and str.

Referenced by draw_brackets().

static int text_font_draw_character_utf8 ( SpaceText *  st,
int  x,
int  y,
const char *  c 
) [static]

Definition at line 95 of file text_draw.c.

References BLF_draw(), BLF_position(), BLI_str_utf8_size(), BLI_UTF8_MAX, SpaceText::cwidth, len(), mono, and str.

Referenced by text_draw(), and text_draw_wrapped().

static void text_font_end ( SpaceText *  UNUSEDst) [static]

Definition at line 71 of file text_draw.c.

Referenced by draw_text_main(), and text_update_character_width().

void text_free_caches ( SpaceText *  st)

Definition at line 977 of file text_draw.c.

References SpaceText::drawcache, DrawCache::line_height, and MEM_freeN().

Referenced by text_free().

int text_get_char_pos ( SpaceText *  st,
const char *  line,
int  cur 
)

Definition at line 678 of file text_draw.c.

References BLI_str_utf8_size(), i, and SpaceText::tabnumber.

Referenced by cursor_skip_find_line(), draw_brackets(), draw_cursor(), draw_markers(), txt_wrap_move_down(), and txt_wrap_move_up().

int text_get_span_wrap ( SpaceText *  st,
ARegion *  ar,
TextLine *  from,
TextLine *  to 
)

Definition at line 1034 of file text_draw.c.

References TextLine::line, TextLine::next, text_get_visible_lines(), txt_get_span(), and SpaceText::wordwrap.

Referenced by calc_text_rcts().

int text_get_total_lines ( SpaceText *  st,
ARegion *  ar 
)

Definition at line 1051 of file text_draw.c.

References SpaceText::drawcache, text_update_drawcache(), and DrawCache::total_lines.

Referenced by calc_text_rcts(), text_scroll_modal(), and txt_screen_skip().

int text_get_visible_lines ( SpaceText *  st,
ARegion *  ar,
const char *  str 
)

Definition at line 999 of file text_draw.c.

References BLI_str_utf8_size(), i, max, SpaceText::tabnumber, and wrap_width().

Referenced by cursor_skip_find_line(), draw_cursor(), get_first_visible_line(), text_get_span_wrap(), text_update_drawcache(), txt_wrap_move_down(), txt_wrap_move_up(), and wrap_offset().

static int text_get_visible_lines_no ( SpaceText *  st,
int  lineno 
) [static]

Definition at line 992 of file text_draw.c.

References SpaceText::drawcache, and DrawCache::line_height.

Referenced by draw_text_main(), and first_visible_line().

void text_scroll_to_cursor ( SpaceText *  st,
ScrArea *  sa 
)

Definition at line 1860 of file text_draw.c.

References Text::curc, Text::curl, SpaceText::cwidth, ELEM3, ListBase::first, i, SpaceText::left, TextLine::line, Text::lines, ARegion::next, NULL, ScrArea::regionbase, ARegion::regiontype, RGN_TYPE_WINDOW, Text::selc, Text::sell, SpaceText::text, text_draw(), text_update_character_width(), SpaceText::top, txt_get_span(), TXT_SCROLL_WIDTH, SpaceText::viewlines, ARegion::winx, SpaceText::wordwrap, and wrap_offset().

Referenced by text_listener(), and text_update_cursor_moved().

void text_update_character_width ( SpaceText *  st)

Definition at line 1850 of file text_draw.c.

References BLF_fixed_width(), SpaceText::cwidth, MAX2, mono, text_font_begin(), and text_font_end().

Referenced by text_cursor_set_to_pos(), text_do_suggest_select(), text_line_number_invoke(), text_scroll_apply(), text_scroll_invoke(), text_scroll_to_cursor(), text_update_drawcache(), txt_wrap_move_bol(), txt_wrap_move_down(), txt_wrap_move_eol(), and txt_wrap_move_up().

void text_update_cursor_moved ( bContext *  C)

Definition at line 1904 of file text_draw.c.

References CTX_wm_area(), CTX_wm_space_text(), and text_scroll_to_cursor().

Referenced by ED_text_undo_step(), text_clear_all_markers_exec(), text_comment_exec(), text_convert_whitespace_exec(), text_cursor_set_apply(), text_cursor_set_exec(), text_cursor_set_exit(), text_cut_exec(), text_delete_exec(), text_find_and_replace(), text_indent_exec(), text_insert_exec(), text_jump_exec(), text_line_break_exec(), text_line_number_invoke(), text_make_internal_exec(), text_move_cursor(), text_next_marker_exec(), text_paste_exec(), text_previous_marker_exec(), text_reload_exec(), text_run_script(), text_save_as_exec(), text_save_exec(), text_select_all_exec(), text_select_line_exec(), text_select_word_exec(), text_uncomment_exec(), text_unindent_exec(), and text_unlink_exec().

static void text_update_drawcache ( SpaceText *  st,
ARegion *  ar 
) [static]

Definition at line 831 of file text_draw.c.

References BLI_countlist(), SpaceText::cwidth, DrawCache::cwidth, SpaceText::drawcache, ListBase::first, Text::id, SpaceText::lheight, DrawCache::lheight, TextLine::line, DrawCache::line_height, SpaceText::linenrs_tot, Text::lines, MAX_ID_NAME, MEM_callocN(), MEM_freeN(), MEM_reallocN(), ID::name, TextLine::next, DrawCache::nlines, NULL, SpaceText::showlinenrs, DrawCache::showlinenrs, size(), SpaceText::tabnumber, DrawCache::tabnumber, SpaceText::text, text_drawcache_init(), text_get_visible_lines(), DrawCache::text_id, text_update_character_width(), DrawCache::total_lines, DrawCache::update_flag, DrawCache::valid_head, DrawCache::valid_tail, ARegion::winx, DrawCache::winx, SpaceText::wordwrap, and DrawCache::wordwrap.

Referenced by draw_text_main(), first_visible_line(), and text_get_total_lines().

static void txt_format_line ( SpaceText *  st,
TextLine *  line,
int  do_next 
) [static]

Definition at line 306 of file text_draw.c.

References BLI_str_utf8_size(), FlattenString::buf, find(), find_bool(), find_builtinfunc(), find_decorator(), find_specialvar(), flatten_string(), flatten_string_free(), TextLine::format, i, len(), TextLine::line, TextLine::next, NULL, TextLine::prev, str, strlen(), text_check_delim(), text_check_digit(), text_check_format_len(), TXT_DBLQUOTSTR, TXT_SNGQUOTSTR, and TXT_TRISTR.

Referenced by draw_text_main().

static const char* txt_utf8_get_nth ( const char *  str,
int  n 
) [static]

Definition at line 691 of file text_draw.c.

References BLI_str_utf8_size().

Referenced by text_draw(), and text_draw_wrapped().

void wrap_offset ( SpaceText *  st,
ARegion *  ar,
TextLine *  linein,
int  cursin,
int *  offl,
int *  offc 
)

Definition at line 528 of file text_draw.c.

References BLI_str_utf8_size(), ListBase::first, i, TextLine::line, Text::lines, max, TextLine::next, SpaceText::tabnumber, SpaceText::text, text_get_visible_lines(), SpaceText::top, txt_utf8_offset_to_index(), SpaceText::wordwrap, and wrap_width().

Referenced by draw_brackets(), draw_cursor(), draw_markers(), and text_scroll_to_cursor().

void wrap_offset_in_line ( SpaceText *  st,
ARegion *  ar,
TextLine *  linein,
int  cursin,
int *  offl,
int *  offc 
)

Definition at line 619 of file text_draw.c.

References BLI_str_utf8_size(), i, TextLine::line, max, SpaceText::tabnumber, SpaceText::text, txt_utf8_offset_to_index(), SpaceText::wordwrap, and wrap_width().

Referenced by cursor_skip_find_line(), draw_cursor(), txt_wrap_move_down(), and txt_wrap_move_up().

int wrap_width ( SpaceText *  st,
ARegion *  ar 
)

Definition at line 517 of file text_draw.c.

References SpaceText::cwidth, max, SpaceText::showlinenrs, TEXTXLOC, TXT_OFFSET, TXT_SCROLL_WIDTH, and ARegion::winx.

Referenced by text_cursor_set_to_pos_wrapped(), text_get_cursor_rel(), text_get_visible_lines(), txt_wrap_move_bol(), txt_wrap_move_eol(), wrap_offset(), and wrap_offset_in_line().

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