aniani/elinks
1
0
Fork 0
mirror of https://github.com/rkd77/elinks.git synced 2025-02-02 15:09:23 -05:00
Code

draw_border_cross(): Simplify lookup and describe the magic

Browse Source
This commit is contained in:
Jonas Fonseca 2005-10-11 15:51:18 +02:00 committed by Jonas Fonseca
parent 9735520297
commit d672ecf8f7
1 changed files with 10 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/terminal/draw.c
View File

@ -40,16 +40,15 @@ get_char(struct terminal *term, int x, int y)
return &term->screen->image[x + term->width * y];
}
/* TODO: Clearify this piece of magic code. --jonas */
void
draw_border_cross(struct terminal *term, int x, int y,
enum border_cross_direction dir, struct color_pair *color)
{
static unsigned char border_trans[2][4] = {
/* Used for BORDER_X_{RIGHT,LEFT}: */
{ BORDER_SVLINE, BORDER_SRTEE, BORDER_SLTEE, BORDER_SCROSS },
{ BORDER_SVLINE, BORDER_SRTEE, BORDER_SLTEE },
/* Used for BORDER_X_{DOWN,UP}: */
{ BORDER_SHLINE, BORDER_SDTEE, BORDER_SUTEE, BORDER_SCROSS },
{ BORDER_SHLINE, BORDER_SDTEE, BORDER_SUTEE },
};
struct screen_char *screen_char = get_char(term, x, y);
unsigned int d;
@ -57,12 +56,19 @@ draw_border_cross(struct terminal *term, int x, int y,
if (!screen_char) return;
if (!(screen_char->attr & SCREEN_ATTR_FRAME)) return;
/* First check if there is already a horizontal/vertical line, so that
* we will have to replace with a T char. Example: if there is a '|'
* and the direction is right, replace with a '|-' T char.
*
* If this is not the case check if there is a T char and we are adding
* the direction so that we end up with a cross. Example : if there is
* a '|-' and the direction is left, replace with a '+' (cross) char. */
d = dir>>1;
if (screen_char->data == border_trans[d][0]) {
screen_char->data = border_trans[d][1 + (dir & 1)];
} else if (screen_char->data == border_trans[d][2 - (dir & 1)]) {
screen_char->data = border_trans[d][3];
screen_char->data = BORDER_SCROSS;
}
set_term_color(screen_char, color, 0,