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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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* 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.
*/
/** \file
* \ingroup spinfo
*/
#include <math.h>
#include <string.h>
#include <sys/stat.h>
#include <limits.h>
#include <assert.h>
#include "MEM_guardedalloc.h"
#include "BLF_api.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
#include "BLI_string_utf8.h"
#include "GPU_immediate.h"
#include "GPU_state.h"
#include "textview.h"
static void console_font_begin(const int font_id, const int lheight)
{
/* 0.875 is based on: 16 pixels lines get 14 pixel text */
BLF_size(font_id, 0.875 * lheight, 72);
}
typedef struct ConsoleDrawContext {
int font_id;
int cwidth;
int lheight;
/** text vertical offset */
int lofs;
/** number of characters that fit into the width of the console (fixed width) */
int console_width;
int winx;
int ymin, ymax;
int *xy; // [2]
int *sel; // [2]
/* bottom of view == 0, top of file == combine chars, end of line is lower then start. */
int *pos_pick;
const int *mval; // [2]
int draw;
} ConsoleDrawContext;
BLI_INLINE void console_step_sel(ConsoleDrawContext *cdc, const int step)
{
cdc->sel[0] += step;
cdc->sel[1] += step;
}
static void console_draw_sel(const char *str,
const int sel[2],
const int xy[2],
const int str_len_draw,
int cwidth,
int lheight,
const unsigned char bg_sel[4])
{
if (sel[0] <= str_len_draw && sel[1] >= 0) {
const int sta = BLI_str_utf8_offset_to_column(str, max_ii(sel[0], 0));
const int end = BLI_str_utf8_offset_to_column(str, min_ii(sel[1], str_len_draw));
GPU_blend(true);
GPU_blend_set_func_separate(
GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA, GPU_ONE, GPU_ONE_MINUS_SRC_ALPHA);
GPUVertFormat *format = immVertexFormat();
uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_I32, 2, GPU_FETCH_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
immUniformColor4ubv(bg_sel);
immRecti(pos, xy[0] + (cwidth * sta), xy[1] - 2 + lheight, xy[0] + (cwidth * end), xy[1] - 2);
immUnbindProgram();
GPU_blend(false);
}
}
/* warning: allocated memory for 'offsets' must be freed by caller */
static int console_wrap_offsets(const char *str, int len, int width, int *lines, int **offsets)
{
int i, end; /* column */
int j; /* mem */
*lines = 1;
*offsets = MEM_callocN(
sizeof(**offsets) *
(len * BLI_UTF8_WIDTH_MAX / MAX2(1, width - (BLI_UTF8_WIDTH_MAX - 1)) + 1),
"console_wrap_offsets");
(*offsets)[0] = 0;
for (i = 0, end = width, j = 0; j < len && str[j]; j += BLI_str_utf8_size_safe(str + j)) {
int columns = BLI_str_utf8_char_width_safe(str + j);
if (i + columns > end) {
(*offsets)[*lines] = j;
(*lines)++;
end = i + width;
}
i += columns;
}
return j; /* return actual length */
}
/* return 0 if the last line is off the screen
* should be able to use this for any string type */
static int console_draw_string(ConsoleDrawContext *cdc,
const char *str,
int str_len,
const unsigned char fg[3],
const unsigned char bg[3],
const unsigned char bg_sel[4])
{
int tot_lines; /* total number of lines for wrapping */
int *offsets; /* offsets of line beginnings for wrapping */
int y_next;
str_len = console_wrap_offsets(str, str_len, cdc->console_width, &tot_lines, &offsets);
y_next = cdc->xy[1] + cdc->lheight * tot_lines;
/* just advance the height */
if (cdc->draw == 0) {
if (cdc->pos_pick && cdc->mval[1] != INT_MAX && cdc->xy[1] <= cdc->mval[1]) {
if (y_next >= cdc->mval[1]) {
int ofs = 0;
/* wrap */
if (tot_lines > 1) {
int iofs = (int)((float)(y_next - cdc->mval[1]) / cdc->lheight);
ofs += offsets[MIN2(iofs, tot_lines - 1)];
}
/* last part */
ofs += BLI_str_utf8_offset_from_column(str + ofs,
(int)floor((float)cdc->mval[0] / cdc->cwidth));
CLAMP(ofs, 0, str_len);
*cdc->pos_pick += str_len - ofs;
}
else {
*cdc->pos_pick += str_len + 1;
}
}
cdc->xy[1] = y_next;
MEM_freeN(offsets);
return 1;
}
else if (y_next < cdc->ymin) {
/* have not reached the drawable area so don't break */
cdc->xy[1] = y_next;
/* adjust selection even if not drawing */
if (cdc->sel[0] != cdc->sel[1]) {
console_step_sel(cdc, -(str_len + 1));
}
MEM_freeN(offsets);
return 1;
}
if (tot_lines > 1) { /* wrap? */
const int initial_offset = offsets[tot_lines - 1];
size_t len = str_len - initial_offset;
const char *s = str + initial_offset;
int i;
int sel_orig[2];
copy_v2_v2_int(sel_orig, cdc->sel);
/* invert and swap for wrapping */
cdc->sel[0] = str_len - sel_orig[1];
cdc->sel[1] = str_len - sel_orig[0];
if (bg) {
GPUVertFormat *format = immVertexFormat();
uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_I32, 2, GPU_FETCH_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
immUniformColor3ubv(bg);
immRecti(pos, 0, cdc->xy[1], cdc->winx, (cdc->xy[1] + (cdc->lheight * tot_lines)));
immUnbindProgram();
}
/* last part needs no clipping */
BLF_position(cdc->font_id, cdc->xy[0], cdc->lofs + cdc->xy[1], 0);
BLF_color3ubv(cdc->font_id, fg);
BLF_draw_mono(cdc->font_id, s, len, cdc->cwidth);
if (cdc->sel[0] != cdc->sel[1]) {
console_step_sel(cdc, -initial_offset);
/* BLF_color3ub(cdc->font_id, 255, 0, 0); // debug */
console_draw_sel(s, cdc->sel, cdc->xy, len, cdc->cwidth, cdc->lheight, bg_sel);
}
cdc->xy[1] += cdc->lheight;
for (i = tot_lines - 1; i > 0; i--) {
len = offsets[i] - offsets[i - 1];
s = str + offsets[i - 1];
BLF_position(cdc->font_id, cdc->xy[0], cdc->lofs + cdc->xy[1], 0);
BLF_draw_mono(cdc->font_id, s, len, cdc->cwidth);
if (cdc->sel[0] != cdc->sel[1]) {
console_step_sel(cdc, len);
/* BLF_color3ub(cdc->font_id, 0, 255, 0); // debug */
console_draw_sel(s, cdc->sel, cdc->xy, len, cdc->cwidth, cdc->lheight, bg_sel);
}
cdc->xy[1] += cdc->lheight;
/* check if were out of view bounds */
if (cdc->xy[1] > cdc->ymax) {
MEM_freeN(offsets);
return 0;
}
}
copy_v2_v2_int(cdc->sel, sel_orig);
console_step_sel(cdc, -(str_len + 1));
}
else { /* simple, no wrap */
if (bg) {
GPUVertFormat *format = immVertexFormat();
uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_I32, 2, GPU_FETCH_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
immUniformColor3ubv(bg);
immRecti(pos, 0, cdc->xy[1], cdc->winx, cdc->xy[1] + cdc->lheight);
immUnbindProgram();
}
BLF_color3ubv(cdc->font_id, fg);
BLF_position(cdc->font_id, cdc->xy[0], cdc->lofs + cdc->xy[1], 0);
BLF_draw_mono(cdc->font_id, str, str_len, cdc->cwidth);
if (cdc->sel[0] != cdc->sel[1]) {
int isel[2];
isel[0] = str_len - cdc->sel[1];
isel[1] = str_len - cdc->sel[0];
/* BLF_color3ub(cdc->font_id, 255, 255, 0); // debug */
console_draw_sel(str, isel, cdc->xy, str_len, cdc->cwidth, cdc->lheight, bg_sel);
console_step_sel(cdc, -(str_len + 1));
}
cdc->xy[1] += cdc->lheight;
if (cdc->xy[1] > cdc->ymax) {
MEM_freeN(offsets);
return 0;
}
}
MEM_freeN(offsets);
return 1;
}
#define CONSOLE_DRAW_MARGIN 4
int textview_draw(
TextViewContext *tvc, const int draw, int mval[2], void **mouse_pick, int *pos_pick)
{
ConsoleDrawContext cdc = {0};
int x_orig = CONSOLE_DRAW_MARGIN, y_orig = CONSOLE_DRAW_MARGIN + tvc->lheight / 6;
int xy[2], y_prev;
int sel[2] = {-1, -1}; /* defaults disabled */
unsigned char fg[3], bg[3];
const int font_id = blf_mono_font;
console_font_begin(font_id, tvc->lheight);
xy[0] = x_orig;
xy[1] = y_orig;
if (mval[1] != INT_MAX) {
mval[1] += (tvc->ymin + CONSOLE_DRAW_MARGIN);
}
if (pos_pick) {
*pos_pick = 0;
}
/* constants for the sequencer context */
cdc.font_id = font_id;
cdc.cwidth = (int)BLF_fixed_width(font_id);
BLI_assert(cdc.cwidth > 0);
cdc.lheight = tvc->lheight;
cdc.lofs = -BLF_descender(font_id);
/* note, scroll bar must be already subtracted () */
cdc.console_width = (tvc->winx - (CONSOLE_DRAW_MARGIN * 2)) / cdc.cwidth;
/* avoid divide by zero on small windows */
if (cdc.console_width < 1) {
cdc.console_width = 1;
}
cdc.winx = tvc->winx - CONSOLE_DRAW_MARGIN;
cdc.ymin = tvc->ymin;
cdc.ymax = tvc->ymax;
cdc.xy = xy;
cdc.sel = sel;
cdc.pos_pick = pos_pick;
cdc.mval = mval;
cdc.draw = draw;
/* shouldnt be needed */
tvc->cwidth = cdc.cwidth;
tvc->console_width = cdc.console_width;
tvc->iter_index = 0;
if (tvc->sel_start != tvc->sel_end) {
sel[0] = tvc->sel_start;
sel[1] = tvc->sel_end;
}
if (tvc->begin(tvc)) {
unsigned char bg_sel[4] = {0};
if (draw && tvc->const_colors) {
tvc->const_colors(tvc, bg_sel);
}
do {
const char *ext_line;
int ext_len;
int color_flag = 0;
y_prev = xy[1];
if (draw) {
color_flag = tvc->line_color(tvc, fg, bg);
}
tvc->line_get(tvc, &ext_line, &ext_len);
if (!console_draw_string(&cdc,
ext_line,
ext_len,
(color_flag & TVC_LINE_FG) ? fg : NULL,
(color_flag & TVC_LINE_BG) ? bg : NULL,
bg_sel)) {
/* when drawing, if we pass v2d->cur.ymax, then quit */
if (draw) {
break; /* past the y limits */
}
}
if ((mval[1] != INT_MAX) && (mval[1] >= y_prev && mval[1] <= xy[1])) {
*mouse_pick = (void *)tvc->iter;
break;
}
tvc->iter_index++;
} while (tvc->step(tvc));
}
tvc->end(tvc);
xy[1] += tvc->lheight * 2;
return xy[1] - y_orig;
}
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