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The escape sequence for erasing lines is now also supported (it's used by KDL command history).

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14001 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2005-08-20 20:55:02 +00:00
parent ed73e0eefa
commit 70c3e1a42c
1 changed files with 30 additions and 3 deletions
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33
src/system/kernel/debug/blue_screen.cpp
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@ -31,6 +31,12 @@ typedef enum {
CONSOLE_STATE_PARSING_ARG,
} console_state;
typedef enum {
LINE_ERASE_WHOLE,
LINE_ERASE_LEFT,
LINE_ERASE_RIGHT
} erase_line_mode;
struct screen_info {
int32 columns;
int32 rows;
@ -107,6 +113,25 @@ next_line(void)
}
static void
erase_line(erase_line_mode mode)
{
switch (mode) {
case LINE_ERASE_WHOLE:
sModule->fill_glyph(0, sScreen.y, sScreen.columns, 1, ' ', sScreen.attr);
break;
case LINE_ERASE_LEFT:
sModule->fill_glyph(0, sScreen.y, sScreen.x + 1, 1, ' ', sScreen.attr);
break;
case LINE_ERASE_RIGHT:
sModule->fill_glyph(sScreen.x, sScreen.y, sScreen.columns - sScreen.x,
1, ' ', sScreen.attr);
break;
// default:
}
}
static void
back_space(void)
{
@ -288,17 +313,19 @@ process_vt100_command(const char c, bool seenBracket, int32 *args, int32 argCoun
}
break;
}
#endif
case 'K':
if (argCount == 0 || args[0] == 0) {
// erase to end of line
erase_line(console, LINE_ERASE_RIGHT);
erase_line(LINE_ERASE_RIGHT);
} else if (argCount > 0) {
if (args[0] == 1)
erase_line(console, LINE_ERASE_LEFT);
erase_line(LINE_ERASE_LEFT);
else if (args[0] == 2)
erase_line(console, LINE_ERASE_WHOLE);
erase_line(LINE_ERASE_WHOLE);
}
break;
#if 0
case 'J':
if (argCount == 0 || args[0] == 0) {
// erase to end of screen