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blender-archive/source/blender/editors/space_text/text_draw.c

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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*/
/** \file
* \ingroup sptext
*/
#include "MEM_guardedalloc.h"
#include "BLF_api.h"
#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "DNA_screen_types.h"
#include "DNA_space_types.h"
#include "DNA_text_types.h"
#include "BKE_context.h"
#include "BKE_screen.h"
#include "BKE_text.h"
#include "BKE_text_suggestions.h"
#include "ED_text.h"
#include "GPU_immediate.h"
#include "GPU_state.h"
#include "UI_interface.h"
#include "UI_resources.h"
#include "UI_view2d.h"
#include "text_format.h"
#include "text_intern.h"
/******************** text font drawing ******************/
typedef struct TextDrawContext {
int font_id;
int cwidth_px;
int lheight_px;
bool syntax_highlight;
} TextDrawContext;
static void text_draw_context_init(const SpaceText *st, TextDrawContext *tdc)
{
tdc->font_id = blf_mono_font;
tdc->cwidth_px = 0;
tdc->lheight_px = st->runtime.lheight_px;
tdc->syntax_highlight = st->showsyntax && ED_text_is_syntax_highlight_supported(st->text);
}
static void text_font_begin(const TextDrawContext *tdc)
{
BLF_size(tdc->font_id, tdc->lheight_px, 72);
}
static void text_font_end(const TextDrawContext *UNUSED(tdc))
{
}
static int text_font_draw(const TextDrawContext *tdc, int x, int y, const char *str)
{
int columns;
BLF_position(tdc->font_id, x, y, 0);
columns = BLF_draw_mono(tdc->font_id, str, BLF_DRAW_STR_DUMMY_MAX, tdc->cwidth_px);
return tdc->cwidth_px * columns;
}
static int text_font_draw_character(const TextDrawContext *tdc, int x, int y, char c)
{
BLF_position(tdc->font_id, x, y, 0);
BLF_draw(tdc->font_id, &c, 1);
return tdc->cwidth_px;
}
static int text_font_draw_character_utf8(const TextDrawContext *tdc, int x, int y, const char *c)
{
int columns;
const size_t len = BLI_str_utf8_size_safe(c);
BLF_position(tdc->font_id, x, y, 0);
columns = BLF_draw_mono(tdc->font_id, c, len, tdc->cwidth_px);
return tdc->cwidth_px * columns;
}
#if 0
/* Formats every line of the current text */
static void txt_format_text(SpaceText *st)
{
TextLine *linep;
if (!st->text) {
return;
}
for (linep = st->text->lines.first; linep; linep = linep->next) {
txt_format_line(st, linep, 0);
}
}
#endif
/* Sets the current drawing color based on the format character specified */
static void format_draw_color(const TextDrawContext *tdc, char formatchar)
{
switch (formatchar) {
case FMT_TYPE_WHITESPACE:
break;
case FMT_TYPE_SYMBOL:
UI_FontThemeColor(tdc->font_id, TH_SYNTAX_S);
break;
case FMT_TYPE_COMMENT:
UI_FontThemeColor(tdc->font_id, TH_SYNTAX_C);
break;
case FMT_TYPE_NUMERAL:
UI_FontThemeColor(tdc->font_id, TH_SYNTAX_N);
break;
case FMT_TYPE_STRING:
UI_FontThemeColor(tdc->font_id, TH_SYNTAX_L);
break;
case FMT_TYPE_DIRECTIVE:
UI_FontThemeColor(tdc->font_id, TH_SYNTAX_D);
break;
case FMT_TYPE_SPECIAL:
UI_FontThemeColor(tdc->font_id, TH_SYNTAX_V);
break;
case FMT_TYPE_RESERVED:
UI_FontThemeColor(tdc->font_id, TH_SYNTAX_R);
break;
case FMT_TYPE_KEYWORD:
UI_FontThemeColor(tdc->font_id, TH_SYNTAX_B);
break;
case FMT_TYPE_DEFAULT:
default:
UI_FontThemeColor(tdc->font_id, TH_TEXT);
break;
}
}
/************************** draw text *****************************/
/**
* Notes on word-wrap
* --
* All word-wrap functions follow the algorithm below to maintain consistency:
* - line:
* The line to wrap (tabs converted to spaces)
* - view_width:
* The maximum number of characters displayable in the region
* This equals region_width/font_width for the region
* - wrap_chars:
* Characters that allow wrapping. This equals [' ', '\t', '-']
*
* \code{.py}
* def wrap(line, view_width, wrap_chars):
* draw_start = 0
* draw_end = view_width
* pos = 0
* for c in line:
* if pos-draw_start >= view_width:
* print line[draw_start:draw_end]
* draw_start = draw_end
* draw_end += view_width
* elif c in wrap_chars:
* draw_end = pos+1
* pos += 1
* print line[draw_start:]
* \encode
*/
int wrap_width(const SpaceText *st, ARegion *region)
{
int winx = region->winx - TXT_SCROLL_WIDTH;
int x, max;
x = TXT_BODY_LEFT(st);
max = st->runtime.cwidth_px ? (winx - x) / st->runtime.cwidth_px : 0;
return max > 8 ? max : 8;
}
/* Sets (offl, offc) for transforming (line, curs) to its wrapped position */
void wrap_offset(
const SpaceText *st, ARegion *region, TextLine *linein, int cursin, int *offl, int *offc)
{
Text *text;
TextLine *linep;
int i, j, start, end, max, chop;
char ch;
*offl = *offc = 0;
if (!st->text) {
return;
}
if (!st->wordwrap) {
return;
}
text = st->text;
/* Move pointer to first visible line (top) */
linep = text->lines.first;
i = st->top;
while (i > 0 && linep) {
int lines = text_get_visible_lines(st, region, linep->line);
/* Line before top */
if (linep == linein) {
if (lines <= i) {
/* no visible part of line */
return;
}
}
if (i - lines < 0) {
break;
}
linep = linep->next;
(*offl) += lines - 1;
i -= lines;
}
max = wrap_width(st, region);
cursin = BLI_str_utf8_offset_to_column(linein->line, cursin);
while (linep) {
start = 0;
end = max;
chop = 1;
*offc = 0;
for (i = 0, j = 0; linep->line[j]; j += BLI_str_utf8_size_safe(linep->line + j)) {
int chars;
int columns = BLI_str_utf8_char_width_safe(linep->line + j); /* = 1 for tab */
/* Mimic replacement of tabs */
ch = linep->line[j];
if (ch == '\t') {
chars = st->tabnumber - i % st->tabnumber;
if (linep == linein && i < cursin) {
cursin += chars - 1;
}
ch = ' ';
}
else {
chars = 1;
}
while (chars--) {
if (i + columns - start > max) {
end = MIN2(end, i);
if (chop && linep == linein && i >= cursin) {
if (i == cursin) {
(*offl)++;
*offc -= end - start;
}
return;
}
(*offl)++;
*offc -= end - start;
start = end;
end += max;
chop = 1;
}
else if (ELEM(ch, ' ', '-')) {
end = i + 1;
chop = 0;
if (linep == linein && i >= cursin) {
return;
}
}
i += columns;
}
}
if (linep == linein) {
break;
}
linep = linep->next;
}
}
/* cursin - mem, offc - view */
void wrap_offset_in_line(
const SpaceText *st, ARegion *region, TextLine *linein, int cursin, int *offl, int *offc)
{
int i, j, start, end, chars, max, chop;
char ch;
*offl = *offc = 0;
if (!st->text) {
return;
}
if (!st->wordwrap) {
return;
}
max = wrap_width(st, region);
start = 0;
end = max;
chop = 1;
*offc = 0;
cursin = BLI_str_utf8_offset_to_column(linein->line, cursin);
for (i = 0, j = 0; linein->line[j]; j += BLI_str_utf8_size_safe(linein->line + j)) {
int columns = BLI_str_utf8_char_width_safe(linein->line + j); /* = 1 for tab */
/* Mimic replacement of tabs */
ch = linein->line[j];
if (ch == '\t') {
chars = st->tabnumber - i % st->tabnumber;
if (i < cursin) {
cursin += chars - 1;
}
ch = ' ';
}
else {
chars = 1;
}
while (chars--) {
if (i + columns - start > max) {
end = MIN2(end, i);
if (chop && i >= cursin) {
if (i == cursin) {
(*offl)++;
*offc -= end - start;
}
return;
}
(*offl)++;
*offc -= end - start;
start = end;
end += max;
chop = 1;
}
else if (ELEM(ch, ' ', '-')) {
end = i + 1;
chop = 0;
if (i >= cursin) {
return;
}
}
i += columns;
}
}
}
int text_get_char_pos(const SpaceText *st, const char *line, int cur)
{
int a = 0, i;
for (i = 0; i < cur && line[i]; i += BLI_str_utf8_size_safe(line + i)) {
if (line[i] == '\t') {
a += st->tabnumber - a % st->tabnumber;
}
else {
a += BLI_str_utf8_char_width_safe(line + i);
}
}
return a;
}
static const char *txt_utf8_forward_columns(const char *str, int columns, int *padding)
{
int col;
const char *p = str;
while (*p) {
col = BLI_str_utf8_char_width(p);
if (columns - col < 0) {
break;
}
columns -= col;
p += BLI_str_utf8_size_safe(p);
if (columns == 0) {
break;
}
}
if (padding) {
*padding = *p ? columns : 0;
}
return p;
}
static int text_draw_wrapped(const SpaceText *st,
const TextDrawContext *tdc,
const char *str,
int x,
int y,
int w,
const char *format,
int skip)
{
const bool use_syntax = (tdc->syntax_highlight && format);
FlattenString fs;
int basex, lines;
int i, wrap, end, max, columns, padding; /* column */
/* warning, only valid when 'use_syntax' is set */
int a, fstart, fpos; /* utf8 chars */
int mi, ma, mstart, mend; /* mem */
char fmt_prev = 0xff;
/* don't draw lines below this */
const int clip_min_y = -(int)(st->runtime.lheight_px - 1);
flatten_string(st, &fs, str);
str = fs.buf;
max = w / st->runtime.cwidth_px;
if (max < 8) {
max = 8;
}
basex = x;
lines = 1;
fpos = fstart = 0;
mstart = 0;
mend = txt_utf8_forward_columns(str, max, &padding) - str;
end = wrap = max - padding;
for (i = 0, mi = 0; str[mi]; i += columns, mi += BLI_str_utf8_size_safe(str + mi)) {
columns = BLI_str_utf8_char_width_safe(str + mi);
if (i + columns > end) {
/* skip hidden part of line */
if (skip) {
skip--;
if (use_syntax) {
/* currently fpos only used when formatting */
fpos += BLI_strnlen_utf8(str + mstart, mend - mstart);
}
fstart = fpos;
mstart = mend;
mend = txt_utf8_forward_columns(str + mend, max, &padding) - str;
end = (wrap += max - padding);
continue;
}
/* Draw the visible portion of text on the overshot line */
for (a = fstart, ma = mstart; ma < mend; a++, ma += BLI_str_utf8_size_safe(str + ma)) {
if (use_syntax) {
if (fmt_prev != format[a]) {
format_draw_color(tdc, fmt_prev = format[a]);
}
}
x += text_font_draw_character_utf8(tdc, x, y, str + ma);
fpos++;
}
y -= TXT_LINE_HEIGHT(st);
x = basex;
lines++;
fstart = fpos;
mstart = mend;
mend = txt_utf8_forward_columns(str + mend, max, &padding) - str;
end = (wrap += max - padding);
if (y <= clip_min_y) {
break;
}
}
else if (ELEM(str[mi], ' ', '-')) {
wrap = i + 1;
mend = mi + 1;
}
}
/* Draw the remaining text */
for (a = fstart, ma = mstart; str[ma] && y > clip_min_y;
a++, ma += BLI_str_utf8_size_safe(str + ma)) {
if (use_syntax) {
if (fmt_prev != format[a]) {
format_draw_color(tdc, fmt_prev = format[a]);
}
}
x += text_font_draw_character_utf8(tdc, x, y, str + ma);
}
flatten_string_free(&fs);
return lines;
}
static void text_draw(const SpaceText *st,
const TextDrawContext *tdc,
char *str,
int cshift,
int maxwidth,
int x,
int y,
const char *format)
{
const bool use_syntax = (tdc->syntax_highlight && format);
FlattenString fs;
int columns, size, n, w = 0, padding, amount = 0;
const char *in = NULL;
for (n = flatten_string(st, &fs, str), str = fs.buf; n > 0; n--) {
columns = BLI_str_utf8_char_width_safe(str);
size = BLI_str_utf8_size_safe(str);
if (!in) {
if (w >= cshift) {
padding = w - cshift;
in = str;
}
else if (format) {
format++;
}
}
if (in) {
if (maxwidth && w + columns > cshift + maxwidth) {
break;
}
amount++;
}
w += columns;
str += size;
}
if (!in) {
flatten_string_free(&fs);
return; /* String is shorter than shift or ends with a padding */
}
x += tdc->cwidth_px * padding;
if (use_syntax) {
int a, str_shift = 0;
char fmt_prev = 0xff;
for (a = 0; a < amount; a++) {
if (format[a] != fmt_prev) {
format_draw_color(tdc, fmt_prev = format[a]);
}
x += text_font_draw_character_utf8(tdc, x, y, in + str_shift);
str_shift += BLI_str_utf8_size_safe(in + str_shift);
}
}
else {
text_font_draw(tdc, x, y, in);
}
flatten_string_free(&fs);
}
/************************ cache utilities *****************************/
typedef struct DrawCache {
int *line_height;
int total_lines, nlines;
/* this is needed to check cache relevance */
int winx, wordwrap, showlinenrs, tabnumber;
short lheight;
char cwidth_px;
char text_id[MAX_ID_NAME];
/* for partial lines recalculation */
short update_flag;
int valid_head, valid_tail; /* amount of unchanged lines */
} DrawCache;
static void text_drawcache_init(SpaceText *st)
{
DrawCache *drawcache = MEM_callocN(sizeof(DrawCache), "text draw cache");
drawcache->winx = -1;
drawcache->nlines = BLI_listbase_count(&st->text->lines);
drawcache->text_id[0] = '\0';
st->runtime.drawcache = drawcache;
}
static void text_update_drawcache(SpaceText *st, ARegion *region)
{
DrawCache *drawcache;
int full_update = 0, nlines = 0;
Text *txt = st->text;
if (st->runtime.drawcache == NULL) {
text_drawcache_init(st);
}
text_update_character_width(st);
drawcache = st->runtime.drawcache;
nlines = drawcache->nlines;
/* check if full cache update is needed */
/* area was resized */
full_update |= drawcache->winx != region->winx;
/* word-wrapping option was toggled */
full_update |= drawcache->wordwrap != st->wordwrap;
/* word-wrapping option was toggled */
full_update |= drawcache->showlinenrs != st->showlinenrs;
/* word-wrapping option was toggled */
full_update |= drawcache->tabnumber != st->tabnumber;
/* word-wrapping option was toggled */
full_update |= drawcache->lheight != st->runtime.lheight_px;
/* word-wrapping option was toggled */
full_update |= drawcache->cwidth_px != st->runtime.cwidth_px;
/* text datablock was changed */
full_update |= !STREQLEN(drawcache->text_id, txt->id.name, MAX_ID_NAME);
if (st->wordwrap) {
/* update line heights */
if (full_update || !drawcache->line_height) {
drawcache->valid_head = 0;
drawcache->valid_tail = 0;
drawcache->update_flag = 1;
}
if (drawcache->update_flag) {
TextLine *line = st->text->lines.first;
int lineno = 0, size, lines_count;
int *fp = drawcache->line_height, *new_tail, *old_tail;
nlines = BLI_listbase_count(&txt->lines);
size = sizeof(int) * nlines;
if (fp) {
fp = MEM_reallocN(fp, size);
}
else {
fp = MEM_callocN(size, "text drawcache line_height");
}
drawcache->valid_tail = drawcache->valid_head = 0;
old_tail = fp + drawcache->nlines - drawcache->valid_tail;
new_tail = fp + nlines - drawcache->valid_tail;
memmove(new_tail, old_tail, drawcache->valid_tail);
drawcache->total_lines = 0;
if (st->showlinenrs) {
st->runtime.line_number_display_digits = integer_digits_i(nlines);
}
while (line) {
if (drawcache->valid_head) { /* we're inside valid head lines */
lines_count = fp[lineno];
drawcache->valid_head--;
}
else if (lineno > new_tail - fp) { /* we-re inside valid tail lines */
lines_count = fp[lineno];
}
else {
lines_count = text_get_visible_lines(st, region, line->line);
}
fp[lineno] = lines_count;
line = line->next;
lineno++;
drawcache->total_lines += lines_count;
}
drawcache->line_height = fp;
}
}
else {
if (drawcache->line_height) {
MEM_freeN(drawcache->line_height);
drawcache->line_height = NULL;
}
if (full_update || drawcache->update_flag) {
nlines = BLI_listbase_count(&txt->lines);
if (st->showlinenrs) {
st->runtime.line_number_display_digits = integer_digits_i(nlines);
}
}
drawcache->total_lines = nlines;
}
drawcache->nlines = nlines;
/* store settings */
drawcache->winx = region->winx;
drawcache->wordwrap = st->wordwrap;
drawcache->lheight = st->runtime.lheight_px;
drawcache->cwidth_px = st->runtime.cwidth_px;
drawcache->showlinenrs = st->showlinenrs;
drawcache->tabnumber = st->tabnumber;
strncpy(drawcache->text_id, txt->id.name, MAX_ID_NAME);
/* clear update flag */
drawcache->update_flag = 0;
drawcache->valid_head = 0;
drawcache->valid_tail = 0;
}
void text_drawcache_tag_update(SpaceText *st, int full)
{
/* this happens if text editor ops are caled from python */
if (st == NULL) {
return;
}
if (st->runtime.drawcache != NULL) {
DrawCache *drawcache = st->runtime.drawcache;
Text *txt = st->text;
if (drawcache->update_flag) {
/* happens when tagging update from space listener */
/* should do nothing to prevent locally tagged cache be fully recalculated */
return;
}
if (!full) {
int sellno = BLI_findindex(&txt->lines, txt->sell);
int curlno = BLI_findindex(&txt->lines, txt->curl);
if (curlno < sellno) {
drawcache->valid_head = curlno;
drawcache->valid_tail = drawcache->nlines - sellno - 1;
}
else {
drawcache->valid_head = sellno;
drawcache->valid_tail = drawcache->nlines - curlno - 1;
}
/* quick cache recalculation is also used in delete operator,
* which could merge lines which are adjacent to current selection lines
* expand recalculate area to this lines */
if (drawcache->valid_head > 0) {
drawcache->valid_head--;
}
if (drawcache->valid_tail > 0) {
drawcache->valid_tail--;
}
}
else {
drawcache->valid_head = 0;
drawcache->valid_tail = 0;
}
drawcache->update_flag = 1;
}
}
void text_free_caches(SpaceText *st)
{
DrawCache *drawcache = st->runtime.drawcache;
if (drawcache) {
if (drawcache->line_height) {
MEM_freeN(drawcache->line_height);
}
MEM_freeN(drawcache);
}
}
/************************ word-wrap utilities *****************************/
/* cache should be updated in caller */
static int text_get_visible_lines_no(const SpaceText *st, int lineno)
{
const DrawCache *drawcache = st->runtime.drawcache;
return drawcache->line_height[lineno];
}
int text_get_visible_lines(const SpaceText *st, ARegion *region, const char *str)
{
int i, j, start, end, max, lines, chars;
char ch;
max = wrap_width(st, region);
lines = 1;
start = 0;
end = max;
for (i = 0, j = 0; str[j]; j += BLI_str_utf8_size_safe(str + j)) {
int columns = BLI_str_utf8_char_width_safe(str + j); /* = 1 for tab */
/* Mimic replacement of tabs */
ch = str[j];
if (ch == '\t') {
chars = st->tabnumber - i % st->tabnumber;
ch = ' ';
}
else {
chars = 1;
}
while (chars--) {
if (i + columns - start > max) {
lines++;
start = MIN2(end, i);
end += max;
}
else if (ELEM(ch, ' ', '-')) {
end = i + 1;
}
i += columns;
}
}
return lines;
}
int text_get_span_wrap(const SpaceText *st, ARegion *region, TextLine *from, TextLine *to)
{
if (st->wordwrap) {
int ret = 0;
TextLine *tmp = from;
/* Look forwards */
while (tmp) {
if (tmp == to) {
return ret;
}
ret += text_get_visible_lines(st, region, tmp->line);
tmp = tmp->next;
}
return ret;
}
return txt_get_span(from, to);
}
int text_get_total_lines(SpaceText *st, ARegion *region)
{
DrawCache *drawcache;
text_update_drawcache(st, region);
drawcache = st->runtime.drawcache;
return drawcache->total_lines;
}
/************************ draw scrollbar *****************************/
static void calc_text_rcts(SpaceText *st, ARegion *region, rcti *scroll, rcti *back)
{
int lhlstart, lhlend, ltexth, sell_off, curl_off;
short barheight, barstart, hlstart, hlend, blank_lines;
short pix_available, pix_top_margin, pix_bottom_margin, pix_bardiff;
pix_top_margin = (0.4 * U.widget_unit);
pix_bottom_margin = (0.4 * U.widget_unit);
pix_available = region->winy - pix_top_margin - pix_bottom_margin;
ltexth = text_get_total_lines(st, region);
blank_lines = st->runtime.viewlines / 2;
/* nicer code: use scroll rect for entire bar */
back->xmin = region->winx - (0.6 * U.widget_unit);
back->xmax = region->winx;
back->ymin = 0;
back->ymax = region->winy;
scroll->xmax = region->winx - (0.2 * U.widget_unit);
scroll->xmin = scroll->xmax - (0.4 * U.widget_unit);
scroll->ymin = pix_top_margin;
scroll->ymax = pix_available;
/* when re-sizing a 2D Viewport with the bar at the bottom to a greater height
* more blank lines will be added */
if (ltexth + blank_lines < st->top + st->runtime.viewlines) {
blank_lines = st->top + st->runtime.viewlines - ltexth;
}
ltexth += blank_lines;
barheight = (ltexth > 0) ? (st->runtime.viewlines * pix_available) / ltexth : 0;
pix_bardiff = 0;
if (barheight < 20) {
pix_bardiff = 20 - barheight; /* take into account the now non-linear sizing of the bar */
barheight = 20;
}
barstart = (ltexth > 0) ? ((pix_available - pix_bardiff) * st->top) / ltexth : 0;
st->runtime.scroll_region_handle = *scroll;
st->runtime.scroll_region_handle.ymax -= barstart;
st->runtime.scroll_region_handle.ymin = st->runtime.scroll_region_handle.ymax - barheight;
CLAMP(st->runtime.scroll_region_handle.ymin, pix_bottom_margin, region->winy - pix_top_margin);
CLAMP(st->runtime.scroll_region_handle.ymax, pix_bottom_margin, region->winy - pix_top_margin);
st->runtime.scroll_px_per_line = (pix_available > 0) ? (float)ltexth / pix_available : 0;
if (st->runtime.scroll_px_per_line < 0.1f) {
st->runtime.scroll_px_per_line = 0.1f;
}
curl_off = text_get_span_wrap(st, region, st->text->lines.first, st->text->curl);
sell_off = text_get_span_wrap(st, region, st->text->lines.first, st->text->sell);
lhlstart = MIN2(curl_off, sell_off);
lhlend = MAX2(curl_off, sell_off);
if (ltexth > 0) {
hlstart = (lhlstart * pix_available) / ltexth;
hlend = (lhlend * pix_available) / ltexth;
/* the scrollbar is non-linear sized */
if (pix_bardiff > 0) {
/* the start of the highlight is in the current viewport */
if (st->runtime.viewlines && lhlstart >= st->top &&
lhlstart <= st->top + st->runtime.viewlines) {
/* speed the progresion of the start of the highlight through the scrollbar */
hlstart = (((pix_available - pix_bardiff) * lhlstart) / ltexth) +
(pix_bardiff * (lhlstart - st->top) / st->runtime.viewlines);
}
else if (lhlstart > st->top + st->runtime.viewlines && hlstart < barstart + barheight &&
hlstart > barstart) {
/* push hl start down */
hlstart = barstart + barheight;
}
else if (lhlend > st->top && lhlstart < st->top && hlstart > barstart) {
/*fill out start */
hlstart = barstart;
}
if (hlend <= hlstart) {
hlend = hlstart + 2;
}
/* the end of the highlight is in the current viewport */
if (st->runtime.viewlines && lhlend >= st->top &&
lhlend <= st->top + st->runtime.viewlines) {
/* speed the progresion of the end of the highlight through the scrollbar */
hlend = (((pix_available - pix_bardiff) * lhlend) / ltexth) +
(pix_bardiff * (lhlend - st->top) / st->runtime.viewlines);
}
else if (lhlend < st->top && hlend >= barstart - 2 && hlend < barstart + barheight) {
/* push hl end up */
hlend = barstart;
}
else if (lhlend > st->top + st->runtime.viewlines &&
lhlstart < st->top + st->runtime.viewlines && hlend < barstart + barheight) {
/* fill out end */
hlend = barstart + barheight;
}
if (hlend <= hlstart) {
hlstart = hlend - 2;
}
}
}
else {
hlstart = 0;
hlend = 0;
}
if (hlend - hlstart < 2) {
hlend = hlstart + 2;
}
st->runtime.scroll_region_select = *scroll;
st->runtime.scroll_region_select.ymax = region->winy - pix_top_margin - hlstart;
st->runtime.scroll_region_select.ymin = region->winy - pix_top_margin - hlend;
CLAMP(st->runtime.scroll_region_select.ymin, pix_bottom_margin, region->winy - pix_top_margin);
CLAMP(st->runtime.scroll_region_select.ymax, pix_bottom_margin, region->winy - pix_top_margin);
}
static void draw_textscroll(const SpaceText *st, rcti *scroll, rcti *back)
{
bTheme *btheme = UI_GetTheme();
uiWidgetColors wcol = btheme->tui.wcol_scroll;
float col[4];
float rad;
/* background so highlights don't go behind the scrollbar */
uint pos = GPU_vertformat_attr_add(
immVertexFormat(), "pos", GPU_COMP_I32, 2, GPU_FETCH_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
immUniformThemeColor(TH_BACK);
immRecti(pos, back->xmin, back->ymin, back->xmax, back->ymax);
immUnbindProgram();
UI_draw_widget_scroll(&wcol,
scroll,
&st->runtime.scroll_region_handle,
(st->flags & ST_SCROLL_SELECT) ? UI_SCROLL_PRESSED : 0);
UI_draw_roundbox_corner_set(UI_CNR_ALL);
rad = 0.4f * min_ii(BLI_rcti_size_x(&st->runtime.scroll_region_select),
BLI_rcti_size_y(&st->runtime.scroll_region_select));
UI_GetThemeColor3fv(TH_HILITE, col);
col[3] = 0.18f;
UI_draw_roundbox_aa(true,
st->runtime.scroll_region_select.xmin + 1,
st->runtime.scroll_region_select.ymin,
st->runtime.scroll_region_select.xmax - 1,
st->runtime.scroll_region_select.ymax,
rad,
col);
}
/*********************** draw documentation *******************************/
#if 0
static void draw_documentation(const SpaceText *st, ARegion *region)
{
TextDrawContext tdc = {0};
TextLine *tmp;
char *docs, buf[DOC_WIDTH + 1], *p;
int i, br, lines;
int boxw, boxh, l, x, y /* , top */ /* UNUSED */;
if (!st || !st->text) {
return;
}
if (!texttool_text_is_active(st->text)) {
return;
}
docs = texttool_docs_get();
if (!docs) {
return;
}
text_draw_context_init(st, &tdc);
/* Count the visible lines to the cursor */
for (tmp = st->text->curl, l = -st->top; tmp; tmp = tmp->prev, l++) {
/* pass */
}
if (l < 0) {
return;
}
x = TXT_BODY_LEFT(st) + (st->runtime.cwidth_px * (st->text->curc - st->left));
if (texttool_suggest_first()) {
x += SUGG_LIST_WIDTH * st->runtime.cwidth_px + 50;
}
/* top = */ /* UNUSED */ y = region->winy - st->runtime.lheight_px * l - 2;
boxw = DOC_WIDTH * st->runtime.cwidth_px + 20;
boxh = (DOC_HEIGHT + 1) * TXT_LINE_HEIGHT(st);
/* Draw panel */
uint pos = GPU_vertformat_attr_add(
immVertexFormat(), "pos", GPU_COMP_I32, 2, GPU_FETCH_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
immUniformThemeColor(TH_BACK);
immRecti(pos, x, y, x + boxw, y - boxh);
immUniformThemeColor(TH_SHADE1);
immBegin(GPU_PRIM_LINE_LOOP, 4);
immVertex2i(pos, x, y);
immVertex2i(pos, x + boxw, y);
immVertex2i(pos, x + boxw, y - boxh);
immVertex2i(pos, x, y - boxh);
immEnd();
immBegin(GPU_PRIM_LINE_LOOP, 3);
immVertex2i(pos, x + boxw - 10, y - 7);
immVertex2i(pos, x + boxw - 4, y - 7);
immVertex2i(pos, x + boxw - 7, y - 2);
immEnd();
immBegin(GPU_PRIM_LINE_LOOP, 3);
immVertex2i(pos, x + boxw - 10, y - boxh + 7);
immVertex2i(pos, x + boxw - 4, y - boxh + 7);
immVertex2i(pos, x + boxw - 7, y - boxh + 2);
immEnd();
immUnbindProgram();
UI_FontThemeColor(tdc.font_id, TH_TEXT);
i = 0;
br = DOC_WIDTH;
lines = 0; /* XXX -doc_scroll; */
for (p = docs; *p; p++) {
if (*p == '\r' && *(++p) != '\n') {
*(--p) = '\n'; /* Fix line endings */
}
if (*p == ' ' || *p == '\t') {
br = i;
}
else if (*p == '\n') {
buf[i] = '\0';
if (lines >= 0) {
y -= st->runtime.lheight_px;
text_draw(st, &tdc, buf, 0, 0, x + 4, y - 3, NULL);
}
i = 0;
br = DOC_WIDTH;
lines++;
}
buf[i++] = *p;
if (i == DOC_WIDTH) { /* Reached the width, go to last break and wrap there */
buf[br] = '\0';
if (lines >= 0) {
y -= st->runtime.lheight_px;
text_draw(st, &tdc, buf, 0, 0, x + 4, y - 3, NULL);
}
p -= i - br - 1; /* Rewind pointer to last break */
i = 0;
br = DOC_WIDTH;
lines++;
}
if (lines >= DOC_HEIGHT) {
break;
}
}
}
#endif
/*********************** draw suggestion list *******************************/
static void draw_suggestion_list(const SpaceText *st, const TextDrawContext *tdc, ARegion *region)
{
SuggItem *item, *first, *last, *sel;
char str[SUGG_LIST_WIDTH * BLI_UTF8_MAX + 1];
int offl, offc, vcurl, vcurc;
int w, boxw = 0, boxh, i, x, y, *top;
const int lheight = TXT_LINE_HEIGHT(st);
const int margin_x = 2;
if (!st->text) {
return;
}
if (!texttool_text_is_active(st->text)) {
return;
}
first = texttool_suggest_first();
last = texttool_suggest_last();
if (!first || !last) {
return;
}
text_pop_suggest_list();
sel = texttool_suggest_selected();
top = texttool_suggest_top();
wrap_offset(st, region, st->text->curl, st->text->curc, &offl, &offc);
vcurl = txt_get_span(st->text->lines.first, st->text->curl) - st->top + offl;
vcurc = text_get_char_pos(st, st->text->curl->line, st->text->curc) - st->left + offc;
x = TXT_BODY_LEFT(st) + (vcurc * st->runtime.cwidth_px);
y = region->winy - (vcurl + 1) * lheight - 2;
/* offset back so the start of the text lines up with the suggestions,
* not essential but makes suggestions easier to follow */
x -= st->runtime.cwidth_px *
(st->text->curc - text_find_identifier_start(st->text->curl->line, st->text->curc));
boxw = SUGG_LIST_WIDTH * st->runtime.cwidth_px + 20;
boxh = SUGG_LIST_SIZE * lheight + 8;
if (x + boxw > region->winx) {
x = MAX2(0, region->winx - boxw);
}
/* not needed but stands out nicer */
UI_draw_box_shadow(220, x, y - boxh, x + boxw, y);
uint pos = GPU_vertformat_attr_add(
immVertexFormat(), "pos", GPU_COMP_I32, 2, GPU_FETCH_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
immUniformThemeColor(TH_SHADE1);
immRecti(pos, x - 1, y + 1, x + boxw + 1, y - boxh - 1);
immUniformThemeColorShade(TH_BACK, 16);
immRecti(pos, x, y, x + boxw, y - boxh);
immUnbindProgram();
/* Set the top 'item' of the visible list */
for (i = 0, item = first; i < *top && item->next; i++, item = item->next) {
/* pass */
}
for (i = 0; i < SUGG_LIST_SIZE && item; i++, item = item->next) {
int len = txt_utf8_forward_columns(item->name, SUGG_LIST_WIDTH, NULL) - item->name;
y -= lheight;
BLI_strncpy(str, item->name, len + 1);
w = st->runtime.cwidth_px * text_get_char_pos(st, str, len);
if (item == sel) {
uint posi = GPU_vertformat_attr_add(
immVertexFormat(), "pos", GPU_COMP_I32, 2, GPU_FETCH_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
immUniformThemeColor(TH_SHADE2);
immRecti(posi, x + margin_x, y - 3, x + margin_x + w, y + lheight - 3);
immUnbindProgram();
}
format_draw_color(tdc, item->type);
text_draw(st, tdc, str, 0, 0, x + margin_x, y - 1, NULL);
if (item == last) {
break;
}
}
}
/*********************** draw cursor ************************/
static void draw_text_decoration(SpaceText *st, ARegion *region)
{
Text *text = st->text;
int vcurl, vcurc, vsell, vselc, hidden = 0;
int x, y, w, i;
int offl, offc;
const int lheight = TXT_LINE_HEIGHT(st);
/* Convert to view space character coordinates to determine if cursor is hidden */
wrap_offset(st, region, text->sell, text->selc, &offl, &offc);
vsell = txt_get_span(text->lines.first, text->sell) - st->top + offl;
vselc = text_get_char_pos(st, text->sell->line, text->selc) - st->left + offc;
if (vselc < 0) {
vselc = 0;
hidden = 1;
}
if (text->curl == text->sell && text->curc == text->selc && !st->line_hlight && hidden) {
/* Nothing to draw here */
return;
}
uint pos = GPU_vertformat_attr_add(
immVertexFormat(), "pos", GPU_COMP_I32, 2, GPU_FETCH_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
/* Draw the selection */
if (text->curl != text->sell || text->curc != text->selc) {
/* Convert all to view space character coordinates */
wrap_offset(st, region, text->curl, text->curc, &offl, &offc);
vcurl = txt_get_span(text->lines.first, text->curl) - st->top + offl;
vcurc = text_get_char_pos(st, text->curl->line, text->curc) - st->left + offc;
if (vcurc < 0) {
vcurc = 0;
}
immUniformThemeColor(TH_SHADE2);
x = TXT_BODY_LEFT(st);
y = region->winy;
if (st->flags & ST_SCROLL_SELECT) {
y += st->runtime.scroll_ofs_px[1];
}
if (vcurl == vsell) {
y -= vcurl * lheight;
if (vcurc < vselc) {
immRecti(pos,
x + vcurc * st->runtime.cwidth_px,
y,
x + vselc * st->runtime.cwidth_px,
y - lheight);
}
else {
immRecti(pos,
x + vselc * st->runtime.cwidth_px,
y,
x + vcurc * st->runtime.cwidth_px,
y - lheight);
}
}
else {
int froml, fromc, tol, toc;
if (vcurl < vsell) {
froml = vcurl;
tol = vsell;
fromc = vcurc;
toc = vselc;
}
else {
froml = vsell;
tol = vcurl;
fromc = vselc;
toc = vcurc;
}
y -= froml * lheight;
immRecti(pos, x + fromc * st->runtime.cwidth_px - U.pixelsize, y, region->winx, y - lheight);
y -= lheight;
for (i = froml + 1; i < tol; i++) {
immRecti(pos, x - U.pixelsize, y, region->winx, y - lheight);
y -= lheight;
}
if (x + toc * st->runtime.cwidth_px > x) {
immRecti(pos, x - U.pixelsize, y, x + toc * st->runtime.cwidth_px, y - lheight);
}
y -= lheight;
}
}
if (st->line_hlight) {
int y1, y2;
if (st->wordwrap) {
int visible_lines = text_get_visible_lines(st, region, text->sell->line);
wrap_offset_in_line(st, region, text->sell, text->selc, &offl, &offc);
y1 = region->winy - (vsell - offl) * lheight;
if (st->flags & ST_SCROLL_SELECT) {
y1 += st->runtime.scroll_ofs_px[1];
}
y2 = y1 - (lheight * visible_lines);
}
else {
y1 = region->winy - vsell * lheight;
if (st->flags & ST_SCROLL_SELECT) {
y1 += st->runtime.scroll_ofs_px[1];
}
y2 = y1 - (lheight);
}
if (!(y1 < 0 || y2 > region->winy)) { /* check we need to draw */
float highlight_color[4];
UI_GetThemeColor4fv(TH_TEXT, highlight_color);
highlight_color[3] = 0.1f;
immUniformColor4fv(highlight_color);
GPU_blend(GPU_BLEND_ALPHA);
immRecti(pos, 0, y1, region->winx, y2);
GPU_blend(GPU_BLEND_NONE);
}
}
if (!hidden) {
/* Draw the cursor itself (we draw the sel. cursor as this is the leading edge) */
x = TXT_BODY_LEFT(st) + (vselc * st->runtime.cwidth_px);
y = region->winy - vsell * lheight;
if (st->flags & ST_SCROLL_SELECT) {
y += st->runtime.scroll_ofs_px[1];
}
immUniformThemeColor(TH_HILITE);
if (st->overwrite) {
char ch = text->sell->line[text->selc];
y += TXT_LINE_SPACING(st);
w = st->runtime.cwidth_px;
if (ch == '\t') {
w *= st->tabnumber - (vselc + st->left) % st->tabnumber;
}
immRecti(
pos, x, y - lheight - U.pixelsize, x + w + U.pixelsize, y - lheight - (3 * U.pixelsize));
}
else {
immRecti(pos, x - U.pixelsize, y, x + U.pixelsize, y - lheight);
}
}
immUnbindProgram();
}
/******************* draw matching brackets *********************/
static void draw_brackets(const SpaceText *st, const TextDrawContext *tdc, ARegion *region)
{
TextLine *startl, *endl, *linep;
Text *text = st->text;
int b, fc, find, stack, viewc, viewl, offl, offc, x, y;
int startc, endc, c;
char ch;
/* syntax_highlight must be on or else the format string will be null */
if (!text->curl || !tdc->syntax_highlight) {
return;
}
startl = text->curl;
startc = text->curc;
b = text_check_bracket(startl->line[startc]);
if (b == 0 && startc > 0) {
b = text_check_bracket(startl->line[--startc]);
}
if (b == 0) {
return;
}
linep = startl;
c = startc;
fc = BLI_str_utf8_offset_to_index(linep->line, startc);
endl = NULL;
endc = -1;
find = -b;
stack = 0;
/* Don't highlight backets if syntax HL is off or bracket in string or comment. */
if (!linep->format || linep->format[fc] == FMT_TYPE_STRING ||
linep->format[fc] == FMT_TYPE_COMMENT) {
return;
}
if (b > 0) {
/* opening bracket, search forward for close */
fc++;
c += BLI_str_utf8_size_safe(linep->line + c);
while (linep) {
while (c < linep->len) {
if (linep->format && linep->format[fc] != FMT_TYPE_STRING &&
linep->format[fc] != FMT_TYPE_COMMENT) {
b = text_check_bracket(linep->line[c]);
if (b == find) {
if (stack == 0) {
endl = linep;
endc = c;
break;
}
stack--;
}
else if (b == -find) {
stack++;
}
}
fc++;
c += BLI_str_utf8_size_safe(linep->line + c);
}
if (endl) {
break;
}
linep = linep->next;
c = 0;
fc = 0;
}
}
else {
/* closing bracket, search backward for open */
fc--;
if (c > 0) {
c -= linep->line + c - BLI_str_prev_char_utf8(linep->line + c);
}
while (linep) {
while (fc >= 0) {
if (linep->format && linep->format[fc] != FMT_TYPE_STRING &&
linep->format[fc] != FMT_TYPE_COMMENT) {
b = text_check_bracket(linep->line[c]);
if (b == find) {
if (stack == 0) {
endl = linep;
endc = c;
break;
}
stack--;
}
else if (b == -find) {
stack++;
}
}
fc--;
if (c > 0) {
c -= linep->line + c - BLI_str_prev_char_utf8(linep->line + c);
}
}
if (endl) {
break;
}
linep = linep->prev;
if (linep) {
if (linep->format) {
fc = strlen(linep->format) - 1;
}
else {
fc = -1;
}
if (linep->len) {
c = BLI_str_prev_char_utf8(linep->line + linep->len) - linep->line;
}
else {
fc = -1;
}
}
}
}
if (!endl || endc == -1) {
return;
}
UI_FontThemeColor(tdc->font_id, TH_HILITE);
x = TXT_BODY_LEFT(st);
y = region->winy - st->runtime.lheight_px;
if (st->flags & ST_SCROLL_SELECT) {
y += st->runtime.scroll_ofs_px[1];
}
/* draw opening bracket */
ch = startl->line[startc];
wrap_offset(st, region, startl, startc, &offl, &offc);
viewc = text_get_char_pos(st, startl->line, startc) - st->left + offc;
if (viewc >= 0) {
viewl = txt_get_span(text->lines.first, startl) - st->top + offl;
text_font_draw_character(
tdc, x + viewc * st->runtime.cwidth_px, y - viewl * TXT_LINE_HEIGHT(st), ch);
text_font_draw_character(
tdc, x + viewc * st->runtime.cwidth_px + 1, y - viewl * TXT_LINE_HEIGHT(st), ch);
}
/* draw closing bracket */
ch = endl->line[endc];
wrap_offset(st, region, endl, endc, &offl, &offc);
viewc = text_get_char_pos(st, endl->line, endc) - st->left + offc;
if (viewc >= 0) {
viewl = txt_get_span(text->lines.first, endl) - st->top + offl;
text_font_draw_character(
tdc, x + viewc * st->runtime.cwidth_px, y - viewl * TXT_LINE_HEIGHT(st), ch);
text_font_draw_character(
tdc, x + viewc * st->runtime.cwidth_px + 1, y - viewl * TXT_LINE_HEIGHT(st), ch);
}
}
/*********************** main region drawing *************************/
void draw_text_main(SpaceText *st, ARegion *region)
{
TextDrawContext tdc = {0};
Text *text = st->text;
TextFormatType *tft;
TextLine *tmp;
rcti scroll, back;
char linenr[12];
int i, x, y, winx, linecount = 0, lineno = 0;
int wraplinecount = 0, wrap_skip = 0;
int margin_column_x;
/* if no text, nothing to do */
if (!text) {
return;
}
/* dpi controlled line height and font size */
st->runtime.lheight_px = (U.widget_unit * st->lheight) / 20;
/* don't draw lines below this */
const int clip_min_y = -(int)(st->runtime.lheight_px - 1);
st->runtime.viewlines = (st->runtime.lheight_px) ?
(int)(region->winy - clip_min_y) / TXT_LINE_HEIGHT(st) :
0;
text_draw_context_init(st, &tdc);
text_update_drawcache(st, region);
/* make sure all the positional pointers exist */
if (!text->curl || !text->sell || !text->lines.first || !text->lines.last) {
txt_clean_text(text);
}
/* update rects for scroll */
calc_text_rcts(st, region, &scroll, &back); /* scroll will hold the entire bar size */
/* update syntax formatting if needed */
tft = ED_text_format_get(text);
tmp = text->lines.first;
lineno = 0;
for (i = 0; i < st->top && tmp; i++) {
if (tdc.syntax_highlight && !tmp->format) {
tft->format_line(st, tmp, false);
}
if (st->wordwrap) {
int lines = text_get_visible_lines_no(st, lineno);
if (wraplinecount + lines > st->top) {
wrap_skip = st->top - wraplinecount;
break;
}
wraplinecount += lines;
tmp = tmp->next;
linecount++;
}
else {
tmp = tmp->next;
linecount++;
}
lineno++;
}
text_font_begin(&tdc);
tdc.cwidth_px = max_ii((int)BLF_fixed_width(tdc.font_id), 1);
st->runtime.cwidth_px = tdc.cwidth_px;
/* draw line numbers background */
if (st->showlinenrs) {
uint pos = GPU_vertformat_attr_add(
immVertexFormat(), "pos", GPU_COMP_I32, 2, GPU_FETCH_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
immUniformThemeColor(TH_GRID);
immRecti(pos, 0, 0, TXT_NUMCOL_WIDTH(st), region->winy);
immUnbindProgram();
}
else {
st->runtime.line_number_display_digits = 0; /* not used */
}
x = TXT_BODY_LEFT(st);
y = region->winy - st->runtime.lheight_px;
int viewlines = st->runtime.viewlines;
if (st->flags & ST_SCROLL_SELECT) {
y += st->runtime.scroll_ofs_px[1];
viewlines += 1;
}
winx = region->winx - TXT_SCROLL_WIDTH;
/* draw cursor, margin, selection and highlight */
draw_text_decoration(st, region);
/* draw the text */
UI_FontThemeColor(tdc.font_id, TH_TEXT);
for (i = 0; y > clip_min_y && i < viewlines && tmp; i++, tmp = tmp->next) {
if (tdc.syntax_highlight && !tmp->format) {
tft->format_line(st, tmp, false);
}
if (st->showlinenrs && !wrap_skip) {
/* Draw line number. */
UI_FontThemeColor(tdc.font_id, (tmp == text->curl) ? TH_HILITE : TH_LINENUMBERS);
BLI_snprintf(linenr,
sizeof(linenr),
"%*d",
st->runtime.line_number_display_digits,
i + linecount + 1);
text_font_draw(&tdc, TXT_NUMCOL_PAD * st->runtime.cwidth_px, y, linenr);
/* Change back to text color. */
UI_FontThemeColor(tdc.font_id, TH_TEXT);
}
if (st->wordwrap) {
/* draw word wrapped text */
int lines = text_draw_wrapped(st, &tdc, tmp->line, x, y, winx - x, tmp->format, wrap_skip);
y -= lines * TXT_LINE_HEIGHT(st);
}
else {
/* draw unwrapped text */
text_draw(
st, &tdc, tmp->line, st->left, region->winx / st->runtime.cwidth_px, x, y, tmp->format);
y -= TXT_LINE_HEIGHT(st);
}
wrap_skip = 0;
}
if (st->flags & ST_SHOW_MARGIN) {
margin_column_x = x + st->runtime.cwidth_px * (st->margin_column - st->left);
if (margin_column_x >= x) {
uint pos = GPU_vertformat_attr_add(
immVertexFormat(), "pos", GPU_COMP_I32, 2, GPU_FETCH_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
float margin_color[4];
UI_GetThemeColor4fv(TH_TEXT, margin_color);
margin_color[3] = 0.2f;
immUniformColor4fv(margin_color);
GPU_blend(GPU_BLEND_ALPHA);
immRecti(pos, margin_column_x, 0, margin_column_x + U.pixelsize, region->winy);
GPU_blend(GPU_BLEND_NONE);
immUnbindProgram();
}
}
/* draw other stuff */
draw_brackets(st, &tdc, region);
draw_textscroll(st, &scroll, &back);
/* draw_documentation(st, region); - No longer supported */
draw_suggestion_list(st, &tdc, region);
text_font_end(&tdc);
}
/************************** update ***************************/
void text_update_character_width(SpaceText *st)
{
TextDrawContext tdc = {0};
text_draw_context_init(st, &tdc);
text_font_begin(&tdc);
st->runtime.cwidth_px = BLF_fixed_width(tdc.font_id);
st->runtime.cwidth_px = MAX2(st->runtime.cwidth_px, (char)1);
text_font_end(&tdc);
}
/* Moves the view to the cursor location,
* also used to make sure the view isn't outside the file */
void text_scroll_to_cursor(SpaceText *st, ARegion *region, const bool center)
{
Text *text;
int i, x, winx = region->winx;
if (ELEM(NULL, st, st->text, st->text->curl)) {
return;
}
text = st->text;
text_update_character_width(st);
i = txt_get_span(text->lines.first, text->sell);
if (st->wordwrap) {
int offl, offc;
wrap_offset(st, region, text->sell, text->selc, &offl, &offc);
i += offl;
}
if (center) {
if (st->top + st->runtime.viewlines <= i || st->top > i) {
st->top = i - st->runtime.viewlines / 2;
}
}
else {
if (st->top + st->runtime.viewlines <= i) {
st->top = i - (st->runtime.viewlines - 1);
}
else if (st->top > i) {
st->top = i;
}
}
if (st->wordwrap) {
st->left = 0;
}
else {
x = st->runtime.cwidth_px * (text_get_char_pos(st, text->sell->line, text->selc) - st->left);
winx -= TXT_BODY_LEFT(st) + TXT_SCROLL_WIDTH;
if (center) {
if (x <= 0 || x > winx) {
st->left += (x - winx / 2) / st->runtime.cwidth_px;
}
}
else {
if (x <= 0) {
st->left += ((x + 1) / st->runtime.cwidth_px) - 1;
}
else if (x > winx) {
st->left += ((x - (winx + 1)) / st->runtime.cwidth_px) + 1;
}
}
}
if (st->top < 0) {
st->top = 0;
}
if (st->left < 0) {
st->left = 0;
}
st->runtime.scroll_ofs_px[0] = 0;
st->runtime.scroll_ofs_px[1] = 0;
}
/* takes an area instead of a region, use for listeners */
void text_scroll_to_cursor__area(SpaceText *st, ScrArea *area, const bool center)
{
ARegion *region;
if (ELEM(NULL, st, st->text, st->text->curl)) {
return;
}
region = BKE_area_find_region_type(area, RGN_TYPE_WINDOW);
if (region) {
text_scroll_to_cursor(st, region, center);
}
}
void text_update_cursor_moved(bContext *C)
{
ScrArea *area = CTX_wm_area(C);
SpaceText *st = CTX_wm_space_text(C);
text_scroll_to_cursor__area(st, area, true);
}
/**
* Takes a cursor (row, character) and returns x,y pixel coords.
*/
bool ED_text_region_location_from_cursor(SpaceText *st,
ARegion *region,
const int cursor_co[2],
int r_pixel_co[2])
{
TextLine *line = NULL;
if (!st->text) {
goto error;
}
line = BLI_findlink(&st->text->lines, cursor_co[0]);
if (!line || (cursor_co[1] < 0) || (cursor_co[1] > line->len)) {
goto error;
}
else {
int offl, offc;
int linenr_offset = TXT_BODY_LEFT(st);
/* handle tabs as well! */
int char_pos = text_get_char_pos(st, line->line, cursor_co[1]);
wrap_offset(st, region, line, cursor_co[1], &offl, &offc);
r_pixel_co[0] = (char_pos + offc - st->left) * st->runtime.cwidth_px + linenr_offset;
r_pixel_co[1] = (cursor_co[0] + offl - st->top) * TXT_LINE_HEIGHT(st);
r_pixel_co[1] = (region->winy - (r_pixel_co[1] + (TXT_BODY_LPAD * st->runtime.cwidth_px))) -
st->runtime.lheight_px;
}
return true;
error:
r_pixel_co[0] = r_pixel_co[1] = -1;
return false;
}
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