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Implement DECSTBM

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This commit is contained in:
Kovid Goyal 2016-11-17 11:13:28 +05:30
parent 586304ad6c
commit 03fd30b4f4
4 changed files with 26 additions and 0 deletions
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1
kitty/data-types.h
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@ -330,6 +330,7 @@ void screen_insert_lines(Screen *self, unsigned int count/*=1*/);
void screen_delete_lines(Screen *self, unsigned int count/*=1*/);
void screen_delete_characters(Screen *self, unsigned int count);
void screen_erase_characters(Screen *self, unsigned int count);
void screen_set_margins(Screen *self, unsigned int top, unsigned int bottom);
void report_device_attributes(Screen *self, unsigned int UNUSED mode, bool UNUSED secondary);
void select_graphic_rendition(Screen *self, unsigned int *params, unsigned int count);
void report_device_status(Screen *self, unsigned int which, bool UNUSED);

2
kitty/parser.c
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@ -344,6 +344,8 @@ HANDLER(csi) {
CSI_HANDLER_MULTIPLE(select_graphic_rendition); \
case DSR: \
CALL_CSI_HANDLER1P(report_device_status, 0, '?'); \
case DECSTBM: \
CALL_CSI_HANDLER2(screen_set_margins, 0, 0); \
uint8_t ch = buf[(*pos)++];
unsigned int params[MAX_PARAMS], p1, p2, count, i;

19
kitty/screen.c
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@ -775,6 +775,23 @@ void report_device_status(Screen *self, unsigned int which, bool UNUSED private)
}
}
void screen_set_margins(Screen *self, unsigned int top, unsigned int bottom) {
if (!top) top = 1;
if (!bottom) bottom = self->lines;
top = MIN(self->lines, top);
bottom = MIN(self->lines, bottom);
top--; bottom--; // 1 based indexing
if (bottom > top) {
// Even though VT102 and VT220 require DECSTBM to ignore regions
// of width less than 2, some programs (like aptitude for example)
// rely on it. Practicality beats purity.
self->margin_top = top; self->margin_bottom = bottom;
// The cursor moves to the home position when the top and
// bottom margins of the scrolling region (DECSTBM) changes.
screen_cursor_position(self, 1, 1);
}
}
// }}}
// Python interface {{{
@ -942,6 +959,8 @@ static PyMemberDef members[] = {
{"linebuf", T_OBJECT_EX, offsetof(Screen, linebuf), 0, "linebuf"},
{"lines", T_UINT, offsetof(Screen, lines), 0, "lines"},
{"columns", T_UINT, offsetof(Screen, columns), 0, "columns"},
{"margin_top", T_UINT, offsetof(Screen, margin_top), 0, "margin_top"},
{"margin_bottom", T_UINT, offsetof(Screen, margin_bottom), 0, "margin_bottom"},
{"current_charset", T_UINT, offsetof(Screen, current_charset), 0, "current_charset"},
{NULL}
};

4
kitty_tests/parser.py
View File

@ -116,3 +116,7 @@ class TestScreen(BaseTest):
c.clear()
pb('\033[6n', ('report_device_status', 6, 0))
self.ae(c.wtcbuf, b'\033[2;1R')
pb('\033[2;4r', ('screen_set_margins', 2, 4))
self.ae(s.margin_top, 1), self.ae(s.margin_bottom, 3)
pb('\033[r', ('screen_set_margins', 0, 0))
self.ae(s.margin_top, 0), self.ae(s.margin_bottom, 4)