KittyPatch/kitty
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
kitty/kitty/screen.c

1587 lines
55 KiB
C
Raw Blame History

/*
* screen.c
* Copyright (C) 2016 Kovid Goyal <kovid at kovidgoyal.net>
*
* Distributed under terms of the GPL3 license.
*/
#define SCROLL_LINE -1
#define SCROLL_PAGE -2
#define SCROLL_FULL -3
#define EXTRA_INIT PyModule_AddIntMacro(module, SCROLL_LINE); PyModule_AddIntMacro(module, SCROLL_PAGE); PyModule_AddIntMacro(module, SCROLL_FULL);
#include "data-types.h"
#include "lineops.h"
#include "screen.h"
#include <structmember.h>
#include <limits.h>
#include "unicode-data.h"
#include "modes.h"
#include "wcwidth9.h"
static const ScreenModes empty_modes = {0, .mDECAWM=true, .mDECTCEM=true, .mDECARM=true};
static Selection EMPTY_SELECTION = {0};
// Constructor/destructor {{{
static inline void
init_tabstops(bool *tabstops, index_type count) {
// In terminfo we specify the number of initial tabstops (it) as 8
for (unsigned int t=0; t < count; t++) {
tabstops[t] = (t+1) % 8 == 0 ? true : false;
}
}
#define RESET_CHARSETS \
self->g0_charset = translation_table(0); \
self->g1_charset = self->g0_charset; \
self->g_charset = self->g0_charset; \
self->utf8_state = 0; \
self->utf8_codepoint = 0; \
self->use_latin1 = false;
#define CALLBACK(...) \
if (self->callbacks != Py_None) { \
PyObject *callback_ret = PyObject_CallMethod(self->callbacks, __VA_ARGS__); \
if (callback_ret == NULL) PyErr_Print(); else Py_DECREF(callback_ret); \
}
static PyObject*
new(PyTypeObject *type, PyObject *args, PyObject UNUSED *kwds) {
Screen *self;
int ret = 0;
PyObject *callbacks = Py_None;
unsigned int columns=80, lines=24, scrollback=0;
if (!PyArg_ParseTuple(args, "|OIII", &callbacks, &lines, &columns, &scrollback)) return NULL;
self = (Screen *)type->tp_alloc(type, 0);
if (self != NULL) {
if ((ret = pthread_mutex_init(&self->read_buf_lock, NULL)) != 0) {
Py_CLEAR(self); PyErr_Format(PyExc_RuntimeError, "Failed to create Screen read_buf_lock mutex: %s", strerror(ret));
return NULL;
}
if ((ret = pthread_mutex_init(&self->write_buf_lock, NULL)) != 0) {
Py_CLEAR(self); PyErr_Format(PyExc_RuntimeError, "Failed to create Screen write_buf_lock mutex: %s", strerror(ret));
return NULL;
}
self->columns = columns; self->lines = lines;
self->write_buf = NULL;
self->modes = empty_modes;
self->cursor_changed = Py_True; self->is_dirty = Py_True;
self->scroll_changed = Py_False;
self->margin_top = 0; self->margin_bottom = self->lines - 1;
self->history_line_added_count = 0;
RESET_CHARSETS;
self->callbacks = callbacks; Py_INCREF(callbacks);
self->cursor = alloc_cursor();
self->color_profile = alloc_color_profile();
self->main_linebuf = alloc_linebuf(lines, columns); self->alt_linebuf = alloc_linebuf(lines, columns);
self->linebuf = self->main_linebuf;
self->historybuf = alloc_historybuf(MAX(scrollback, lines), columns);
self->main_tabstops = PyMem_Calloc(2 * self->columns, sizeof(bool));
if (self->cursor == NULL || self->main_linebuf == NULL || self->alt_linebuf == NULL || self->main_tabstops == NULL || self->historybuf == NULL || self->color_profile == NULL) {
Py_CLEAR(self); return NULL;
}
self->alt_tabstops = self->main_tabstops + self->columns * sizeof(bool);
self->tabstops = self->main_tabstops;
init_tabstops(self->main_tabstops, self->columns);
init_tabstops(self->alt_tabstops, self->columns);
}
return (PyObject*) self;
}
void
screen_reset(Screen *self) {
if (self->linebuf == self->alt_linebuf) screen_toggle_screen_buffer(self);
linebuf_clear(self->linebuf, BLANK_CHAR);
self->modes = empty_modes;
#define RC(name) self->color_profile->overridden.name = 0
RC(default_fg); RC(default_bg); RC(cursor_color); RC(highlight_fg); RC(highlight_bg);
#undef RC
RESET_CHARSETS;
self->margin_top = 0; self->margin_bottom = self->lines - 1;
screen_normal_keypad_mode(self);
init_tabstops(self->main_tabstops, self->columns);
init_tabstops(self->alt_tabstops, self->columns);
cursor_reset(self->cursor);
self->cursor_changed = Py_True;
self->is_dirty = Py_True;
screen_cursor_position(self, 1, 1);
set_dynamic_color(self, 110, NULL);
set_dynamic_color(self, 111, NULL);
set_color_table_color(self, 104, NULL);
}
static inline HistoryBuf*
realloc_hb(HistoryBuf *old, unsigned int lines, unsigned int columns) {
HistoryBuf *ans = alloc_historybuf(lines, columns);
if (ans == NULL) { PyErr_NoMemory(); return NULL; }
historybuf_rewrap(old, ans);
return ans;
}
static inline LineBuf*
realloc_lb(LineBuf *old, unsigned int lines, unsigned int columns, int *cursor_y, HistoryBuf *hb) {
LineBuf *ans = alloc_linebuf(lines, columns);
if (ans == NULL) { PyErr_NoMemory(); return NULL; }
linebuf_rewrap(old, ans, cursor_y, hb);
return ans;
}
static bool
screen_resize(Screen *self, unsigned int lines, unsigned int columns) {
lines = MAX(1, lines); columns = MAX(1, columns);
bool is_main = self->linebuf == self->main_linebuf, is_x_shrink = columns < self->columns;
int cursor_y = -1; unsigned int cursor_x = self->cursor->x;
HistoryBuf *nh = realloc_hb(self->historybuf, self->historybuf->ynum, columns);
if (nh == NULL) return false;
Py_CLEAR(self->historybuf); self->historybuf = nh;
LineBuf *n = realloc_lb(self->main_linebuf, lines, columns, &cursor_y, self->historybuf);
if (n == NULL) return false;
Py_CLEAR(self->main_linebuf); self->main_linebuf = n;
bool index_after_resize = false;
if (is_main) {
index_type cy = MIN(self->cursor->y, lines - 1);
linebuf_init_line(self->main_linebuf, cy);
if (is_x_shrink && (self->main_linebuf->continued_map[cy] || line_length(self->main_linebuf->line) > columns)) {
// If the client is in line drawing mode, it will redraw the cursor
// line, this can cause rendering artifacts, so ensure that the
// cursor is on a new line
index_after_resize = true;
}
self->cursor->y = MAX(0, cursor_y);
}
cursor_y = -1;
n = realloc_lb(self->alt_linebuf, lines, columns, &cursor_y, NULL);
if (n == NULL) return false;
Py_CLEAR(self->alt_linebuf); self->alt_linebuf = n;
if (!is_main) self->cursor->y = MAX(0, cursor_y);
self->linebuf = is_main ? self->main_linebuf : self->alt_linebuf;
if (is_x_shrink && cursor_x >= columns) self->cursor->x = columns - 1;
self->lines = lines; self->columns = columns;
self->margin_top = 0; self->margin_bottom = self->lines - 1;
PyMem_Free(self->main_tabstops);
self->main_tabstops = PyMem_Calloc(2*self->columns, sizeof(bool));
if (self->main_tabstops == NULL) { PyErr_NoMemory(); return false; }
self->alt_tabstops = self->main_tabstops + self->columns * sizeof(bool);
self->tabstops = self->main_tabstops;
init_tabstops(self->main_tabstops, self->columns);
init_tabstops(self->alt_tabstops, self->columns);
self->cursor_changed = Py_True; self->is_dirty = Py_True;
if (index_after_resize) screen_index(self);
return true;
}
static void
screen_refresh_sprite_positions(Screen *self) {
linebuf_refresh_sprite_positions(self->main_linebuf);
linebuf_refresh_sprite_positions(self->alt_linebuf);
historybuf_refresh_sprite_positions(self->historybuf);
}
static bool
screen_change_scrollback_size(Screen *self, unsigned int size) {
if (size != self->historybuf->ynum) return historybuf_resize(self->historybuf, size);
return true;
}
static PyObject*
reset_callbacks(Screen *self) {
Py_CLEAR(self->callbacks);
self->callbacks = Py_None;
Py_INCREF(self->callbacks);
Py_RETURN_NONE;
}
static void
dealloc(Screen* self) {
pthread_mutex_destroy(&self->read_buf_lock);
pthread_mutex_destroy(&self->write_buf_lock);
PyMem_RawFree(self->write_buf);
Py_CLEAR(self->callbacks);
Py_CLEAR(self->cursor);
Py_CLEAR(self->main_linebuf);
Py_CLEAR(self->alt_linebuf);
Py_CLEAR(self->historybuf);
Py_CLEAR(self->color_profile);
PyMem_Free(self->main_tabstops);
Py_TYPE(self)->tp_free((PyObject*)self);
} // }}}
// Draw text {{{
void
screen_change_charset(Screen *self, uint32_t which) {
switch(which) {
case 0:
self->g_charset = self->g0_charset; break;
case 1:
self->g_charset = self->g1_charset; break;
}
}
void
screen_designate_charset(Screen *self, uint32_t which, uint32_t as) {
bool change_g = false;
switch(which) {
case 0:
change_g = self->g_charset == self->g0_charset;
self->g0_charset = translation_table(as);
if (change_g) self->g_charset = self->g0_charset;
break;
case 1:
change_g = self->g_charset == self->g1_charset;
self->g1_charset = translation_table(as);
if (change_g) self->g_charset = self->g1_charset;
break;
// We dont care about default as this is guaranteed to only be called with correct which by the parser
}
}
static int (*wcwidth_impl)(wchar_t) = wcwidth;
unsigned int
safe_wcwidth(uint32_t ch) {
int ans = wcwidth_impl(ch);
if (ans < 0) ans = 1;
return MIN(2, ans);
}
void
change_wcwidth(bool use9) {
wcwidth_impl = (use9) ? wcwidth9 : wcwidth;
}
void
screen_draw(Screen *self, uint32_t och) {
if (is_ignored_char(och)) return;
uint32_t ch = och < 256 ? self->g_charset[och] : och;
unsigned int x = self->cursor->x, y = self->cursor->y;
unsigned int char_width = safe_wcwidth(ch);
if (self->columns - self->cursor->x < char_width) {
if (self->modes.mDECAWM) {
screen_carriage_return(self);
screen_linefeed(self);
self->linebuf->continued_map[self->cursor->y] = true;
} else {
self->cursor->x = self->columns - char_width;
}
}
if (char_width > 0) {
linebuf_init_line(self->linebuf, self->cursor->y);
if (self->modes.mIRM) {
line_right_shift(self->linebuf->line, self->cursor->x, char_width);
}
line_set_char(self->linebuf->line, self->cursor->x, ch, char_width, self->cursor);
self->cursor->x++;
if (char_width == 2) {
line_set_char(self->linebuf->line, self->cursor->x, 0, 0, self->cursor);
self->cursor->x++;
}
self->is_dirty = Py_True;
} else if (is_combining_char(ch)) {
if (self->cursor->x > 0) {
linebuf_init_line(self->linebuf, self->cursor->y);
line_add_combining_char(self->linebuf->line, ch, self->cursor->x - 1);
self->is_dirty = Py_True;
} else if (self->cursor->y > 0) {
linebuf_init_line(self->linebuf, self->cursor->y - 1);
line_add_combining_char(self->linebuf->line, ch, self->columns - 1);
self->is_dirty = Py_True;
}
}
if (x != self->cursor->x || y != self->cursor->y) self->cursor_changed = Py_True;
}
void
screen_align(Screen *self) {
self->margin_top = 0; self->margin_bottom = self->lines - 1;
screen_cursor_position(self, 1, 1);
linebuf_clear(self->linebuf, 'E');
}
// }}}
// Graphics {{{
void screen_alignment_display(Screen *self) {
// http://www.vt100.net/docs/vt510-rm/DECALN.html
screen_cursor_position(self, 1, 1);
self->margin_top = 0; self->margin_bottom = self->columns - 1;
for (unsigned int y = 0; y < self->linebuf->ynum; y++) {
linebuf_init_line(self->linebuf, y);
line_clear_text(self->linebuf->line, 0, self->linebuf->xnum, 'E');
}
}
void select_graphic_rendition(Screen *self, unsigned int *params, unsigned int count) {
#define SET_COLOR(which) \
if (i < count) { \
attr = params[i++];\
switch(attr) { \
case 5: \
if (i < count) \
self->cursor->which = (params[i++] & 0xFF) << 8 | 1; \
break; \
case 2: \
if (i < count - 2) { \
r = params[i++] & 0xFF; \
g = params[i++] & 0xFF; \
b = params[i++] & 0xFF; \
self->cursor->which = r << 24 | g << 16 | b << 8 | 2; \
}\
break; \
} \
} \
break;
unsigned int i = 0, attr;
uint8_t r, g, b;
if (!count) { params[0] = 0; count = 1; }
while (i < count) {
attr = params[i++];
switch(attr) {
case 0:
cursor_reset_display_attrs(self->cursor); break;
case 1:
self->cursor->bold = true; break;
case 3:
self->cursor->italic = true; break;
case 4:
self->cursor->decoration = 1; break;
case UNDERCURL_CODE:
self->cursor->decoration = 2; break;
case 7:
self->cursor->reverse = true; break;
case 9:
self->cursor->strikethrough = true; break;
case 22:
self->cursor->bold = false; break;
case 23:
self->cursor->italic = false; break;
case 24:
self->cursor->decoration = 0; break;
case 27:
self->cursor->reverse = false; break;
case 29:
self->cursor->strikethrough = false; break;
START_ALLOW_CASE_RANGE
case 30 ... 37:
self->cursor->fg = ((attr - 30) << 8) | 1; break;
case 38:
SET_COLOR(fg);
case 39:
self->cursor->fg = 0; break;
case 40 ... 47:
self->cursor->bg = ((attr - 40) << 8) | 1; break;
case 48:
SET_COLOR(bg);
case 49:
self->cursor->bg = 0; break;
case 90 ... 97:
self->cursor->fg = ((attr - 90 + 8) << 8) | 1; break;
case 100 ... 107:
self->cursor->bg = ((attr - 100 + 8) << 8) | 1; break;
END_ALLOW_CASE_RANGE
case DECORATION_FG_CODE:
SET_COLOR(decoration_fg);
case DECORATION_FG_CODE + 1:
self->cursor->decoration_fg = 0; break;
}
}
}
// }}}
// Modes {{{
void
screen_toggle_screen_buffer(Screen *self) {
bool to_alt = self->linebuf == self->main_linebuf;
if (to_alt) {
linebuf_clear(self->alt_linebuf, BLANK_CHAR);
screen_save_cursor(self);
self->linebuf = self->alt_linebuf;
self->tabstops = self->alt_tabstops;
screen_cursor_position(self, 1, 1);
cursor_reset(self->cursor);
} else {
self->linebuf = self->main_linebuf;
self->tabstops = self->main_tabstops;
screen_restore_cursor(self);
}
CALLBACK("buf_toggled", "O", self->linebuf == self->main_linebuf ? Py_True : Py_False);
self->is_dirty = Py_True;
}
void screen_normal_keypad_mode(Screen UNUSED *self) {} // Not implemented as this is handled by the GUI
void screen_alternate_keypad_mode(Screen UNUSED *self) {} // Not implemented as this is handled by the GUI
static inline void
set_mode_from_const(Screen *self, unsigned int mode, bool val) {
#define SIMPLE_MODE(name) \
case name: \
self->modes.m##name = val; break;
#define MOUSE_MODE(name, attr, value) \
case name: \
self->modes.attr = val ? value : 0; break;
bool private;
switch(mode) {
SIMPLE_MODE(LNM)
SIMPLE_MODE(IRM)
SIMPLE_MODE(DECARM)
SIMPLE_MODE(BRACKETED_PASTE)
SIMPLE_MODE(EXTENDED_KEYBOARD)
SIMPLE_MODE(FOCUS_TRACKING)
MOUSE_MODE(MOUSE_BUTTON_TRACKING, mouse_tracking_mode, BUTTON_MODE)
MOUSE_MODE(MOUSE_MOTION_TRACKING, mouse_tracking_mode, MOTION_MODE)
MOUSE_MODE(MOUSE_MOVE_TRACKING, mouse_tracking_mode, ANY_MODE)
MOUSE_MODE(MOUSE_UTF8_MODE, mouse_tracking_protocol, UTF8_PROTOCOL)
MOUSE_MODE(MOUSE_SGR_MODE, mouse_tracking_protocol, SGR_PROTOCOL)
MOUSE_MODE(MOUSE_URXVT_MODE, mouse_tracking_protocol, URXVT_PROTOCOL)
case DECSCLM:
case DECNRCM:
break; // we ignore these modes
case DECCKM:
self->modes.mDECCKM = val;
break;
case DECTCEM:
self->modes.mDECTCEM = val;
self->cursor_changed = Py_True;
break;
case DECSCNM:
// Render screen in reverse video
if (self->modes.mDECSCNM != val) {
self->modes.mDECSCNM = val;
self->is_dirty = Py_True;
}
break;
case DECOM:
self->modes.mDECOM = val;
// According to `vttest`, DECOM should also home the cursor, see
// vttest/main.c:303.
screen_cursor_position(self, 1, 1);
break;
case DECAWM:
self->modes.mDECAWM = val; break;
case DECCOLM:
// When DECCOLM mode is set, the screen is erased and the cursor
// moves to the home position.
self->modes.mDECCOLM = val;
screen_erase_in_display(self, 2, false);
screen_cursor_position(self, 1, 1);
break;
case CONTROL_CURSOR_BLINK:
self->cursor->blink = val;
self->cursor_changed = Py_True;
break;
case ALTERNATE_SCREEN:
if (val && self->linebuf == self->main_linebuf) screen_toggle_screen_buffer(self);
else if (!val && self->linebuf != self->main_linebuf) screen_toggle_screen_buffer(self);
break;
default:
private = mode >= 1 << 5;
if (private) mode >>= 5;
fprintf(stderr, "%s %s %u %s\n", ERROR_PREFIX, "Unsupported screen mode: ", mode, private ? "(private)" : "");
}
#undef SIMPLE_MODE
#undef MOUSE_MODE
}
void screen_set_mode(Screen *self, unsigned int mode) {
set_mode_from_const(self, mode, true);
}
void screen_reset_mode(Screen *self, unsigned int mode) {
set_mode_from_const(self, mode, false);
}
// }}}
// Cursor {{{
void
screen_backspace(Screen *self) {
screen_cursor_back(self, 1, -1);
}
void
screen_tab(Screen *self) {
// Move to the next tab space, or the end of the screen if there aren't anymore left.
unsigned int found = 0;
for (unsigned int i = self->cursor->x + 1; i < self->columns; i++) {
if (self->tabstops[i]) { found = i; break; }
}
if (!found) found = self->columns - 1;
if (found != self->cursor->x) {
self->cursor->x = found;
self->cursor_changed = Py_True;
}
}
void
screen_backtab(Screen *self, unsigned int count) {
// Move back count tabs
if (!count) count = 1;
unsigned int before = self->cursor->x;
int i;
while (count > 0 && self->cursor->x > 0) {
count--;
for (i = self->cursor->x - 1; i >= 0; i--) {
if (self->tabstops[i]) { self->cursor->x = i; break; }
}
if (i <= 0) self->cursor->x = 0;
}
if (before != self->cursor->x) self->cursor_changed = Py_True;
}
void
screen_clear_tab_stop(Screen *self, unsigned int how) {
switch(how) {
case 0:
if (self->cursor->x < self->columns) self->tabstops[self->cursor->x] = false;
break;
case 2:
break; // no-op
case 3:
for (unsigned int i = 0; i < self->columns; i++) self->tabstops[i] = false;
break;
default:
fprintf(stderr, "%s %s %u\n", ERROR_PREFIX, "Unsupported clear tab stop mode: ", how);
break;
}
}
void
screen_set_tab_stop(Screen *self) {
if (self->cursor->x < self->columns)
self->tabstops[self->cursor->x] = true;
}
void
screen_cursor_back(Screen *self, unsigned int count/*=1*/, int move_direction/*=-1*/) {
unsigned int x = self->cursor->x;
if (count == 0) count = 1;
if (move_direction < 0 && count > self->cursor->x) self->cursor->x = 0;
else self->cursor->x += move_direction * count;
screen_ensure_bounds(self, false);
if (x != self->cursor->x) self->cursor_changed = Py_True;
}
void
screen_cursor_forward(Screen *self, unsigned int count/*=1*/) {
screen_cursor_back(self, count, 1);
}
void
screen_cursor_up(Screen *self, unsigned int count/*=1*/, bool do_carriage_return/*=false*/, int move_direction/*=-1*/) {
unsigned int x = self->cursor->x, y = self->cursor->y;
if (count == 0) count = 1;
if (move_direction < 0 && count > self->cursor->y) self->cursor->y = 0;
else self->cursor->y += move_direction * count;
screen_ensure_bounds(self, true);
if (do_carriage_return) self->cursor->x = 0;
if (x != self->cursor->x || y != self->cursor->y) self->cursor_changed = Py_True;
}
void
screen_cursor_up1(Screen *self, unsigned int count/*=1*/) {
screen_cursor_up(self, count, true, -1);
}
void
screen_cursor_down(Screen *self, unsigned int count/*=1*/) {
screen_cursor_up(self, count, false, 1);
}
void
screen_cursor_down1(Screen *self, unsigned int count/*=1*/) {
screen_cursor_up(self, count, true, 1);
}
void
screen_cursor_to_column(Screen *self, unsigned int column) {
unsigned int x = MAX(column, 1) - 1;
if (x != self->cursor->x) {
self->cursor->x = x;
screen_ensure_bounds(self, false);
self->cursor_changed = Py_True;
}
}
#define INDEX_UP \
linebuf_index(self->linebuf, top, bottom); \
if (self->linebuf == self->main_linebuf && bottom == self->lines - 1) { \
/* Only add to history when no page margins have been set */ \
linebuf_init_line(self->linebuf, bottom); \
historybuf_add_line(self->historybuf, self->linebuf->line); \
self->history_line_added_count++; \
} \
linebuf_clear_line(self->linebuf, bottom); \
self->is_dirty = Py_True;
void
screen_index(Screen *self) {
// Move cursor down one line, scrolling screen if needed
unsigned int top = self->margin_top, bottom = self->margin_bottom;
if (self->cursor->y == bottom) {
INDEX_UP;
} else screen_cursor_down(self, 1);
}
void
screen_scroll(Screen *self, unsigned int count) {
// Scroll the screen up by count lines, not moving the cursor
count = MIN(self->lines, count);
unsigned int top = self->margin_top, bottom = self->margin_bottom;
while (count > 0) {
count--;
INDEX_UP;
}
}
#define INDEX_DOWN \
linebuf_reverse_index(self->linebuf, top, bottom); \
linebuf_clear_line(self->linebuf, top); \
self->is_dirty = Py_True;
void
screen_reverse_index(Screen *self) {
// Move cursor up one line, scrolling screen if needed
unsigned int top = self->margin_top, bottom = self->margin_bottom;
if (self->cursor->y == top) {
INDEX_DOWN;
} else screen_cursor_up(self, 1, false, -1);
}
void
screen_reverse_scroll(Screen *self, unsigned int count) {
// Scroll the screen down by count lines, not moving the cursor
count = MIN(self->lines, count);
unsigned int top = self->margin_top, bottom = self->margin_bottom;
while (count > 0) {
count--;
INDEX_DOWN;
}
}
void
screen_carriage_return(Screen *self) {
if (self->cursor->x != 0) {
self->cursor->x = 0;
self->cursor_changed = Py_True;
}
}
void
screen_linefeed(Screen *self) {
screen_index(self);
if (self->modes.mLNM) screen_carriage_return(self);
screen_ensure_bounds(self, false);
}
static inline Savepoint*
savepoints_push(SavepointBuffer *self) {
Savepoint *ans = self->buf + ((self->start_of_data + self->count) % SAVEPOINTS_SZ);
if (self->count == SAVEPOINTS_SZ) self->start_of_data = (self->start_of_data + 1) % SAVEPOINTS_SZ;
else self->count++;
return ans;
}
static inline Savepoint*
savepoints_pop(SavepointBuffer *self) {
if (self->count == 0) return NULL;
self->count--;
return self->buf + ((self->start_of_data + self->count) % SAVEPOINTS_SZ);
}
#define COPY_CHARSETS(self, sp) \
sp->utf8_state = self->utf8_state; \
sp->utf8_codepoint = self->utf8_codepoint; \
sp->g0_charset = self->g0_charset; \
sp->g1_charset = self->g1_charset; \
sp->g_charset = self->g_charset; \
sp->use_latin1 = self->use_latin1;
void
screen_save_cursor(Screen *self) {
SavepointBuffer *pts = self->linebuf == self->main_linebuf ? &self->main_savepoints : &self->alt_savepoints;
Savepoint *sp = savepoints_push(pts);
cursor_copy_to(self->cursor, &(sp->cursor));
sp->mDECOM = self->modes.mDECOM;
sp->mDECAWM = self->modes.mDECAWM;
sp->mDECSCNM = self->modes.mDECSCNM;
COPY_CHARSETS(self, sp);
}
void
screen_restore_cursor(Screen *self) {
SavepointBuffer *pts = self->linebuf == self->main_linebuf ? &self->main_savepoints : &self->alt_savepoints;
Savepoint *sp = savepoints_pop(pts);
if (sp == NULL) {
screen_cursor_position(self, 1, 1);
self->cursor_changed = Py_True;
screen_reset_mode(self, DECOM);
RESET_CHARSETS;
screen_reset_mode(self, DECSCNM);
} else {
COPY_CHARSETS(sp, self);
set_mode_from_const(self, DECOM, sp->mDECOM);
set_mode_from_const(self, DECAWM, sp->mDECAWM);
set_mode_from_const(self, DECSCNM, sp->mDECSCNM);
cursor_copy_to(&(sp->cursor), self->cursor);
screen_ensure_bounds(self, false);
}
}
void
screen_ensure_bounds(Screen *self, bool force_use_margins/*=false*/) {
unsigned int top, bottom;
if (force_use_margins || self->modes.mDECOM) {
top = self->margin_top; bottom = self->margin_bottom;
} else {
top = 0; bottom = self->lines - 1;
}
self->cursor->x = MIN(self->cursor->x, self->columns - 1);
self->cursor->y = MAX(top, MIN(self->cursor->y, bottom));
}
void
screen_cursor_position(Screen *self, unsigned int line, unsigned int column) {
line = (line == 0 ? 1 : line) - 1;
column = (column == 0 ? 1: column) - 1;
if (self->modes.mDECOM) {
line += self->margin_top;
line = MAX(self->margin_top, MIN(line, self->margin_bottom));
}
unsigned int x = self->cursor->x, y = self->cursor->y;
self->cursor->x = column; self->cursor->y = line;
screen_ensure_bounds(self, false);
if (x != self->cursor->x || y != self->cursor->y) self->cursor_changed = Py_True;
}
void
screen_cursor_to_line(Screen *self, unsigned int line) {
screen_cursor_position(self, line, self->cursor->x + 1);
}
// }}}
// Editing {{{
void screen_erase_in_line(Screen *self, unsigned int how, bool private) {
/*Erases a line in a specific way.
:param int how: defines the way the line should be erased in:
* ``0`` -- Erases from cursor to end of line, including cursor
position.
* ``1`` -- Erases from beginning of line to cursor,
including cursor position.
* ``2`` -- Erases complete line.
:param bool private: when ``True`` character attributes are left
unchanged.
*/
unsigned int s = 0, n = 0;
switch(how) {
case 0:
s = self->cursor->x;
n = self->columns - self->cursor->x;
break;
case 1:
n = self->cursor->x + 1;
break;
case 2:
n = self->columns;
break;
default:
break;
}
if (n > 0) {
linebuf_init_line(self->linebuf, self->cursor->y);
if (private) {
line_clear_text(self->linebuf->line, s, n, BLANK_CHAR);
} else {
line_apply_cursor(self->linebuf->line, self->cursor, s, n, true);
}
self->is_dirty = Py_True;
}
}
void screen_erase_in_display(Screen *self, unsigned int how, bool private) {
/* Erases display in a specific way.
:param int how: defines the way the line should be erased in:
* ``0`` -- Erases from cursor to end of screen, including
cursor position.
* ``1`` -- Erases from beginning of screen to cursor,
including cursor position.
* ``2`` -- Erases complete display. All lines are erased
and changed to single-width. Cursor does not move.
:param bool private: when ``True`` character attributes are left unchanged
*/
unsigned int a, b;
switch(how) {
case 0:
a = self->cursor->y + 1; b = self->lines; break;
case 1:
a = 0; b = self->cursor->y; break;
case 2:
a = 0; b = self->lines; break;
default:
return;
}
if (b > a) {
for (unsigned int i=a; i < b; i++) {
linebuf_init_line(self->linebuf, i);
if (private) {
line_clear_text(self->linebuf->line, 0, self->columns, BLANK_CHAR);
} else {
line_apply_cursor(self->linebuf->line, self->cursor, 0, self->columns, true);
}
}
self->is_dirty = Py_True;
}
if (how != 2) {
screen_erase_in_line(self, how, private);
}
}
void screen_insert_lines(Screen *self, unsigned int count) {
unsigned int top = self->margin_top, bottom = self->margin_bottom;
if (count == 0) count = 1;
if (top <= self->cursor->y && self->cursor->y <= bottom) {
linebuf_insert_lines(self->linebuf, count, self->cursor->y, bottom);
self->is_dirty = Py_True;
screen_carriage_return(self);
}
}
void screen_delete_lines(Screen *self, unsigned int count) {
unsigned int top = self->margin_top, bottom = self->margin_bottom;
if (count == 0) count = 1;
if (top <= self->cursor->y && self->cursor->y <= bottom) {
linebuf_delete_lines(self->linebuf, count, self->cursor->y, bottom);
self->is_dirty = Py_True;
screen_carriage_return(self);
}
}
void screen_insert_characters(Screen *self, unsigned int count) {
unsigned int top = self->margin_top, bottom = self->margin_bottom;
if (count == 0) count = 1;
if (top <= self->cursor->y && self->cursor->y <= bottom) {
unsigned int x = self->cursor->x;
unsigned int num = MIN(self->columns - x, count);
linebuf_init_line(self->linebuf, self->cursor->y);
line_right_shift(self->linebuf->line, x, num);
line_apply_cursor(self->linebuf->line, self->cursor, x, num, true);
self->is_dirty = Py_True;
}
}
void screen_delete_characters(Screen *self, unsigned int count) {
// Delete characters, later characters are moved left
unsigned int top = self->margin_top, bottom = self->margin_bottom;
if (count == 0) count = 1;
if (top <= self->cursor->y && self->cursor->y <= bottom) {
unsigned int x = self->cursor->x;
unsigned int num = MIN(self->columns - x, count);
linebuf_init_line(self->linebuf, self->cursor->y);
left_shift_line(self->linebuf->line, x, num);
line_apply_cursor(self->linebuf->line, self->cursor, self->columns - num, num, true);
self->is_dirty = Py_True;
}
}
void screen_erase_characters(Screen *self, unsigned int count) {
// Delete characters replacing them by spaces
if (count == 0) count = 1;
unsigned int x = self->cursor->x;
unsigned int num = MIN(self->columns - x, count);
linebuf_init_line(self->linebuf, self->cursor->y);
line_apply_cursor(self->linebuf->line, self->cursor, x, num, true);
self->is_dirty = Py_True;
}
// }}}
// Device control {{{
void
screen_use_latin1(Screen *self, bool on) {
self->use_latin1 = on; self->utf8_state = 0; self->utf8_codepoint = 0;
CALLBACK("use_utf8", "O", on ? Py_False : Py_True);
}
void
screen_bell(Screen UNUSED *self) {
CALLBACK("bell", NULL);
}
static inline void
callback(const char *name, Screen *self, const char *data, unsigned int sz) {
if (sz) { CALLBACK(name, "y#", data, sz); }
else { CALLBACK(name, "y", data); }
}
void
report_device_attributes(Screen *self, unsigned int mode, char start_modifier) {
if (mode == 0) {
switch(start_modifier) {
case 0:
callback("write_to_child", self, "\x1b[?62;c", 0); // VT-220 with no extra info
break;
case '>':
callback("write_to_child", self, "\x1b[>1;" xstr(PRIMARY_VERSION) ";" xstr(SECONDARY_VERSION) "c", 0); // VT-220 + primary version + secondary version
break;
}
}
}
void
report_device_status(Screen *self, unsigned int which, bool private) {
// We dont implement the private device status codes, since I haven't come
// across any programs that use them
unsigned int x, y;
char buf[50] = {0};
switch(which) {
case 5: // device status
callback("write_to_child", self, "\x1b[0n", 0);
break;
case 6: // cursor position
x = self->cursor->x; y = self->cursor->y;
if (x >= self->columns) {
if (y < self->lines - 1) { x = 0; y++; }
else x--;
}
if (self->modes.mDECOM) y -= MAX(y, self->margin_top);
x++; y++; // 1-based indexing
if (snprintf(buf, sizeof(buf) - 1, "\x1b[%s%u;%uR", (private ? "?": ""), y, x) > 0) callback("write_to_child", self, buf, 0);
break;
}
}
void
report_mode_status(Screen *self, unsigned int which, bool private) {
unsigned int q = private ? which << 5 : which;
unsigned int ans = 0;
char buf[50] = {0};
switch(q) {
#define KNOWN_MODE(x) \
case x: \
ans = self->modes.m##x ? 1 : 2; break;
KNOWN_MODE(LNM);
KNOWN_MODE(IRM);
KNOWN_MODE(DECTCEM);
KNOWN_MODE(DECSCNM);
KNOWN_MODE(DECOM);
KNOWN_MODE(DECAWM);
KNOWN_MODE(DECCOLM);
KNOWN_MODE(DECARM);
KNOWN_MODE(DECCKM);
KNOWN_MODE(BRACKETED_PASTE);
KNOWN_MODE(EXTENDED_KEYBOARD);
KNOWN_MODE(FOCUS_TRACKING);
#undef KNOWN_MODE
case STYLED_UNDERLINES:
ans = 3; break;
}
if (snprintf(buf, sizeof(buf) - 1, "\x1b[%s%u;%u$y", (private ? "?" : ""), which, ans)) callback("write_to_child", self, buf, 0);
}
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);
}
}
void
screen_set_cursor(Screen *self, unsigned int mode, uint8_t secondary) {
uint8_t shape; bool blink;
switch(secondary) {
case 0: // DECLL
break;
case '"': // DECCSA
break;
case ' ': // DECSCUSR
shape = 0; blink = false;
if (mode > 0) {
blink = mode % 2;
shape = (mode < 3) ? CURSOR_BLOCK : (mode < 5) ? CURSOR_UNDERLINE : (mode < 7) ? CURSOR_BEAM : 0;
}
if (shape != self->cursor->shape || blink != self->cursor->blink) {
self->cursor->shape = shape; self->cursor->blink = blink;
self->cursor_changed = Py_True;
}
break;
}
}
void
set_title(Screen *self, PyObject *title) {
CALLBACK("title_changed", "O", title);
}
void set_icon(Screen *self, PyObject *icon) {
CALLBACK("icon_changed", "O", icon);
}
void set_dynamic_color(Screen *self, unsigned int code, PyObject *color) {
if (color == NULL) { CALLBACK("set_dynamic_color", "Is", code, ""); }
else { CALLBACK("set_dynamic_color", "IO", code, color); }
}
void set_color_table_color(Screen *self, unsigned int code, PyObject *color) {
if (color == NULL) { CALLBACK("set_color_table_color", "Is", code, ""); }
else { CALLBACK("set_color_table_color", "IO", code, color); }
}
void screen_request_capabilities(Screen *self, PyObject *q) {
CALLBACK("request_capabilities", "O", q);
}
// }}}
// Python interface {{{
#define WRAP0(name) static PyObject* name(Screen *self) { screen_##name(self); Py_RETURN_NONE; }
#define WRAP0x(name) static PyObject* xxx_##name(Screen *self) { screen_##name(self); Py_RETURN_NONE; }
#define WRAP1(name, defval) static PyObject* name(Screen *self, PyObject *args) { unsigned int v=defval; if(!PyArg_ParseTuple(args, "|I", &v)) return NULL; screen_##name(self, v); Py_RETURN_NONE; }
#define WRAP1E(name, defval, ...) static PyObject* name(Screen *self, PyObject *args) { unsigned int v=defval; if(!PyArg_ParseTuple(args, "|I", &v)) return NULL; screen_##name(self, v, __VA_ARGS__); Py_RETURN_NONE; }
#define WRAP1B(name, defval) static PyObject* name(Screen *self, PyObject *args) { unsigned int v=defval; int b=false; if(!PyArg_ParseTuple(args, "|Ip", &v, &b)) return NULL; screen_##name(self, v, b); Py_RETURN_NONE; }
#define WRAP1E(name, defval, ...) static PyObject* name(Screen *self, PyObject *args) { unsigned int v=defval; if(!PyArg_ParseTuple(args, "|I", &v)) return NULL; screen_##name(self, v, __VA_ARGS__); Py_RETURN_NONE; }
#define WRAP2(name, defval1, defval2) static PyObject* name(Screen *self, PyObject *args) { unsigned int a=defval1, b=defval2; if(!PyArg_ParseTuple(args, "|II", &a, &b)) return NULL; screen_##name(self, a, b); Py_RETURN_NONE; }
static PyObject*
line(Screen *self, PyObject *val) {
unsigned long y = PyLong_AsUnsignedLong(val);
if (y >= self->lines) { PyErr_SetString(PyExc_IndexError, "Out of bounds"); return NULL; }
linebuf_init_line(self->linebuf, y);
Py_INCREF(self->linebuf->line);
return (PyObject*) self->linebuf->line;
}
static inline Line*
visual_line_(Screen *self, index_type y) {
if (self->scrolled_by) {
if (y < self->scrolled_by) {
historybuf_init_line(self->historybuf, self->scrolled_by - 1 - y, self->historybuf->line);
return self->historybuf->line;
}
y -= self->scrolled_by;
}
linebuf_init_line(self->linebuf, y);
return self->linebuf->line;
}
static PyObject*
visual_line(Screen *self, PyObject *args) {
// The line corresponding to the yth visual line, taking into account scrolling
unsigned int y;
if (!PyArg_ParseTuple(args, "I", &y)) return NULL;
if (y >= self->lines) { Py_RETURN_NONE; }
return Py_BuildValue("O", visual_line_(self, y));
}
static PyObject*
draw(Screen *self, PyObject *src) {
if (!PyUnicode_Check(src)) { PyErr_SetString(PyExc_TypeError, "A unicode string is required"); return NULL; }
if (PyUnicode_READY(src) != 0) { return PyErr_NoMemory(); }
int kind = PyUnicode_KIND(src);
void *buf = PyUnicode_DATA(src);
Py_ssize_t sz = PyUnicode_GET_LENGTH(src);
for (Py_ssize_t i = 0; i < sz; i++) screen_draw(self, PyUnicode_READ(kind, buf, i));
Py_RETURN_NONE;
}
static PyObject*
reset_mode(Screen *self, PyObject *args) {
int private = false;
unsigned int mode;
if (!PyArg_ParseTuple(args, "I|p", &mode, &private)) return NULL;
if (private) mode <<= 5;
screen_reset_mode(self, mode);
Py_RETURN_NONE;
}
static PyObject*
_select_graphic_rendition(Screen *self, PyObject *args) {
unsigned int params[256] = {0};
for (int i = 0; i < PyTuple_GET_SIZE(args); i++) { params[i] = PyLong_AsUnsignedLong(PyTuple_GET_ITEM(args, i)); }
select_graphic_rendition(self, params, PyList_GET_SIZE(args));
Py_RETURN_NONE;
}
static PyObject*
set_mode(Screen *self, PyObject *args) {
int private = false;
unsigned int mode;
if (!PyArg_ParseTuple(args, "I|p", &mode, &private)) return NULL;
if (private) mode <<= 5;
screen_set_mode(self, mode);
Py_RETURN_NONE;
}
static PyObject*
reset_dirty(Screen *self) {
self->is_dirty = Py_False;
self->cursor_changed = Py_False;
self->history_line_added_count = 0;
Py_RETURN_NONE;
}
WRAP1E(cursor_back, 1, -1)
WRAP1B(erase_in_line, 0)
WRAP1B(erase_in_display, 0)
#define MODE_GETSET(name, uname) \
static PyObject* name##_get(Screen *self, void UNUSED *closure) { PyObject *ans = self->modes.m##uname ? Py_True : Py_False; Py_INCREF(ans); return ans; } \
static int name##_set(Screen *self, PyObject *val, void UNUSED *closure) { if (val == NULL) { PyErr_SetString(PyExc_TypeError, "Cannot delete attribute"); return -1; } set_mode_from_const(self, uname, PyObject_IsTrue(val) ? true : false); return 0; }
MODE_GETSET(in_bracketed_paste_mode, BRACKETED_PASTE)
MODE_GETSET(extended_keyboard, EXTENDED_KEYBOARD)
MODE_GETSET(focus_tracking_enabled, FOCUS_TRACKING)
MODE_GETSET(auto_repeat_enabled, DECARM)
MODE_GETSET(cursor_visible, DECTCEM)
MODE_GETSET(cursor_key_mode, DECCKM)
static PyObject*
mouse_tracking_mode(Screen *self) {
return PyLong_FromUnsignedLong(self->modes.mouse_tracking_mode);
}
static PyObject*
mouse_tracking_protocol(Screen *self) {
return PyLong_FromUnsignedLong(self->modes.mouse_tracking_protocol);
}
static PyObject*
cursor_up(Screen *self, PyObject *args) {
unsigned int count = 1;
int do_carriage_return = false, move_direction = -1;
if (!PyArg_ParseTuple(args, "|Ipi", &count, &do_carriage_return, &move_direction)) return NULL;
screen_cursor_up(self, count, do_carriage_return, move_direction);
Py_RETURN_NONE;
}
WRAP0x(index)
WRAP0(reverse_index)
WRAP0(refresh_sprite_positions)
WRAP0(reset)
WRAP0(set_tab_stop)
WRAP1(clear_tab_stop, 0)
WRAP0(backspace)
WRAP0(tab)
WRAP0(linefeed)
WRAP0(carriage_return)
WRAP2(resize, 1, 1)
WRAP2(set_margins, 1, 1)
static PyObject*
change_scrollback_size(Screen *self, PyObject *args) {
unsigned int count = 1;
if (!PyArg_ParseTuple(args, "|I", &count)) return NULL;
if (!screen_change_scrollback_size(self, MAX(self->lines, count))) return NULL;
Py_RETURN_NONE;
}
static inline void
update_line_data(Line *line, unsigned int dest_y, uint8_t *data) {
size_t base = dest_y * line->xnum * sizeof(Cell);
memcpy(data + base, line->cells, line->xnum * sizeof(Cell));
}
static PyObject*
update_cell_data(Screen *self, PyObject *args) {
PyObject *dp;
uint8_t *data;
int force_screen_refresh;
unsigned int history_line_added_count = self->history_line_added_count;
if (!PyArg_ParseTuple(args, "O!p", &PyLong_Type, &dp, &force_screen_refresh)) return NULL;
data = PyLong_AsVoidPtr(dp);
PyObject *cursor_changed = self->cursor_changed;
bool selection_must_be_cleared = self->is_dirty == Py_True ? true : false;
if (self->scrolled_by) self->scrolled_by = MIN(self->scrolled_by + history_line_added_count, self->historybuf->count);
reset_dirty(self);
self->scroll_changed = Py_False;
for (index_type y = 0; y < MIN(self->lines, self->scrolled_by); y++) {
historybuf_init_line(self->historybuf, self->scrolled_by - 1 - y, self->historybuf->line);
update_line_data(self->historybuf->line, y, data);
}
for (index_type y = self->scrolled_by; y < self->lines; y++) {
linebuf_init_line(self->linebuf, y - self->scrolled_by);
update_line_data(self->linebuf->line, y, data);
}
if (selection_must_be_cleared) self->selection = EMPTY_SELECTION;
return Py_BuildValue("OO", cursor_changed, self->modes.mDECSCNM ? Py_True : Py_False);
}
static inline bool
is_selection_empty(Screen *self, unsigned int start_x, unsigned int start_y, unsigned int end_x, unsigned int end_y) {
return (start_x >= self->columns || start_y >= self->lines || end_x >= self->columns || end_y >= self->lines || (start_x == end_x && start_y == end_y)) ? true : false;
}
static inline void
selection_coord(Screen *self, unsigned int x, unsigned int y, unsigned int ydelta, SelectionBoundary *ans) {
if (y + self->scrolled_by < ydelta) {
ans->x = 0; ans->y = 0;
} else {
y = y - ydelta + self->scrolled_by;
if (y >= self->lines) {
ans->x = self->columns - 1; ans->y = self->lines - 1;
} else {
ans->x = x; ans->y = y;
}
}
}
static inline void
selection_limits_(Screen *self, SelectionBoundary *left, SelectionBoundary *right) {
SelectionBoundary a, b;
selection_coord(self, self->selection.start_x, self->selection.start_y, self->selection.start_scrolled_by, &a);
selection_coord(self, self->selection.end_x, self->selection.end_y, self->selection.end_scrolled_by, &b);
if (a.y < b.y || (a.y == b.y && a.x <= b.x)) { *left = a; *right = b; }
else { *left = b; *right = a; }
}
static PyObject*
apply_selection(Screen *self, PyObject *args) {
unsigned int size;
PyObject *l;
#define start (self->last_rendered_selection_start)
#define end (self->last_rendered_selection_end)
if (!PyArg_ParseTuple(args, "O!I", &PyLong_Type, &l, &size)) return NULL;
float *data = PyLong_AsVoidPtr(l);
memset(data, 0, size);
selection_limits_(self, &start, &end);
self->last_selection_scrolled_by = self->scrolled_by;
self->selection_updated_once = true;
if (is_selection_empty(self, start.x, start.y, end.x, end.y)) { Py_RETURN_NONE; }
for (index_type y = start.y; y <= end.y; y++) {
Line *line = visual_line_(self, y);
index_type xlimit = xlimit_for_line(line);
if (y == end.y) xlimit = MIN(end.x + 1, xlimit);
float *line_start = data + self->columns * y;
for (index_type x = (y == start.y ? start.x : 0); x < xlimit; x++) line_start[x] = 1.0;
}
Py_RETURN_NONE;
#undef start
#undef end
}
static PyObject*
text_for_selection(Screen *self) {
SelectionBoundary start, end;
selection_limits_(self, &start, &end);
if (is_selection_empty(self, start.x, start.y, end.x, end.y)) return PyTuple_New(0);
Py_ssize_t i = 0, num_of_lines = end.y - start.y + 1;
PyObject *ans = PyTuple_New(num_of_lines);
if (ans == NULL) return PyErr_NoMemory();
for (index_type y = start.y; y <= end.y; y++, i++) {
Line *line = visual_line_(self, y);
index_type xlimit = xlimit_for_line(line);
if (y == end.y) xlimit = MIN(end.x + 1, xlimit);
index_type xstart = (y == start.y ? start.x : 0);
char leading_char = i > 0 && !line->continued ? '\n' : 0;
PyObject *text = unicode_in_range(line, xstart, xlimit, true, leading_char);
if (text == NULL) { Py_DECREF(ans); return PyErr_NoMemory(); }
PyTuple_SET_ITEM(ans, i, text);
}
return ans;
}
static PyObject*
selection_range_for_line(Screen *self, PyObject *args) {
unsigned int y;
if (!PyArg_ParseTuple(args, "I", &y)) return NULL;
if (y >= self->lines) { PyErr_SetString(PyExc_ValueError, "y larger than lines"); return NULL; }
Line *line = visual_line_(self, y);
index_type xlimit = line->xnum, xstart = 0;
while (xlimit > 0 && CHAR_IS_BLANK(line->cells[xlimit - 1].ch)) xlimit--;
while (xstart < xlimit && CHAR_IS_BLANK(line->cells[xstart].ch)) xstart++;
return Py_BuildValue("II", (unsigned int)xstart, (unsigned int)xlimit);
}
static inline bool
has_char(int kind, void *data, Py_ssize_t sz, char_type ch) {
for (Py_ssize_t i = 0; i < sz; i++) {
if (PyUnicode_READ(kind, data, i) == ch) return true;
}
return false;
}
static PyObject*
selection_range_for_word(Screen *self, PyObject *args) {
unsigned int x, y;
PyObject *extra_chars;
if (!PyArg_ParseTuple(args, "IIU", &x, &y, &extra_chars)) return NULL;
if (PyUnicode_READY(extra_chars) != 0) return NULL;
if (y >= self->lines) { PyErr_SetString(PyExc_ValueError, "y larger than lines"); return NULL; }
if (x >= self->columns) { PyErr_SetString(PyExc_ValueError, "x larger than columns"); return NULL; }
Line *line = visual_line_(self, y);
#define is_ok(x) (is_word_char((line->cells[x].ch) & CHAR_MASK) || has_char(PyUnicode_KIND(extra_chars), PyUnicode_DATA(extra_chars), PyUnicode_GET_LENGTH(extra_chars), (line->cells[x].ch) & CHAR_MASK))
if (!is_ok(x)) Py_BuildValue("II", x, x + 1);
unsigned int start = x, end = x;
while(start > 0 && is_ok(start - 1)) start--;
while(end < self->columns - 1 && is_ok(end + 1)) end++;
return Py_BuildValue("II", start, end + 1);
#undef is_ok
}
static PyObject*
scroll(Screen *self, PyObject *args) {
int amt, upwards;
if (!PyArg_ParseTuple(args, "ip", &amt, &upwards)) return NULL;
switch(amt) {
case SCROLL_LINE:
amt = 1;
break;
case SCROLL_PAGE:
amt = self->lines - 1;
break;
case SCROLL_FULL:
amt = self->historybuf->count;
break;
default:
if (amt < 0) {
PyErr_SetString(PyExc_ValueError, "scroll amounts must be positive numbers");
return NULL;
}
break;
}
if (!upwards) {
amt = MIN((unsigned int)amt, self->scrolled_by);
amt *= -1;
}
if (amt != 0) {
unsigned int new_scroll = MIN(self->scrolled_by + amt, self->historybuf->count);
if (new_scroll != self->scrolled_by) {
self->scrolled_by = new_scroll;
self->scroll_changed = Py_True;
Py_RETURN_TRUE;
}
}
Py_RETURN_FALSE;
}
static PyObject*
clear_selection(Screen *self) {
self->selection = EMPTY_SELECTION;
Py_RETURN_NONE;
}
static PyObject*
is_selection_in_progress(Screen *self) {
PyObject *ans = self->selection.in_progress ? Py_True : Py_False;
Py_INCREF(ans);
return ans;
}
static PyObject*
is_selection_dirty(Screen *self) {
SelectionBoundary start, end;
selection_limits_(self, &start, &end);
if (self->last_selection_scrolled_by != self->scrolled_by || start.x != self->last_rendered_selection_start.x || start.y != self->last_rendered_selection_start.y || end.x != self->last_rendered_selection_end.x || end.y != self->last_rendered_selection_end.y || !self->selection_updated_once) { Py_RETURN_TRUE; }
Py_RETURN_FALSE;
}
static PyObject*
start_selection(Screen *self, PyObject *args) {
unsigned int x, y;
if (!PyArg_ParseTuple(args, "II", &x, &y)) return NULL;
#define A(attr, val) self->selection.attr = val;
A(start_x, x); A(end_x, x); A(start_y, y); A(end_y, y); A(start_scrolled_by, self->scrolled_by); A(end_scrolled_by, self->scrolled_by); A(in_progress, true);
#undef A
Py_RETURN_NONE;
}
static PyObject*
update_selection(Screen *self, PyObject *args) {
unsigned int x, y;
int ended;
if (!PyArg_ParseTuple(args, "IIp", &x, &y, &ended)) return NULL;
self->selection.end_x = x; self->selection.end_y = y; self->selection.end_scrolled_by = self->scrolled_by;
if (ended) self->selection.in_progress = false;
Py_RETURN_NONE;
}
static PyObject*
mark_as_dirty(Screen *self) {
self->is_dirty = Py_True;
Py_RETURN_NONE;
}
static PyObject*
current_char_width(Screen *self) {
#define current_char_width_doc "The width of the character under the cursor"
unsigned long ans = 1;
if (self->cursor->x < self->columns - 1 && self->cursor->y < self->lines) {
ans = linebuf_char_width_at(self->linebuf, self->cursor->x, self->cursor->y);
}
return PyLong_FromUnsignedLong(ans);
}
static PyObject*
is_main_linebuf(Screen *self) {
PyObject *ans = (self->linebuf == self->main_linebuf) ? Py_True : Py_False;
Py_INCREF(ans);
return ans;
}
static PyObject*
toggle_alt_screen(Screen *self) {
screen_toggle_screen_buffer(self);
Py_RETURN_NONE;
}
WRAP2(cursor_position, 1, 1)
#define COUNT_WRAP(name) WRAP1(name, 1)
COUNT_WRAP(insert_lines)
COUNT_WRAP(delete_lines)
COUNT_WRAP(insert_characters)
COUNT_WRAP(delete_characters)
COUNT_WRAP(erase_characters)
COUNT_WRAP(cursor_up1)
COUNT_WRAP(cursor_down)
COUNT_WRAP(cursor_down1)
COUNT_WRAP(cursor_forward)
#define MND(name, args) {#name, (PyCFunction)name, args, #name},
#define MODEFUNC(name) MND(name, METH_NOARGS) MND(set_##name, METH_O)
static PyMethodDef methods[] = {
MND(line, METH_O)
MND(visual_line, METH_VARARGS)
MND(draw, METH_O)
MND(cursor_position, METH_VARARGS)
MND(set_mode, METH_VARARGS)
MND(reset_mode, METH_VARARGS)
MND(reset, METH_NOARGS)
MND(reset_dirty, METH_NOARGS)
MND(is_main_linebuf, METH_NOARGS)
MND(cursor_back, METH_VARARGS)
MND(erase_in_line, METH_VARARGS)
MND(erase_in_display, METH_VARARGS)
METHOD(current_char_width, METH_NOARGS)
MND(insert_lines, METH_VARARGS)
MND(delete_lines, METH_VARARGS)
MND(insert_characters, METH_VARARGS)
MND(delete_characters, METH_VARARGS)
MND(change_scrollback_size, METH_VARARGS)
MND(erase_characters, METH_VARARGS)
MND(cursor_up, METH_VARARGS)
MND(mouse_tracking_mode, METH_NOARGS)
MND(mouse_tracking_protocol, METH_NOARGS)
MND(cursor_up1, METH_VARARGS)
MND(cursor_down, METH_VARARGS)
MND(cursor_down1, METH_VARARGS)
MND(cursor_forward, METH_VARARGS)
{"index", (PyCFunction)xxx_index, METH_VARARGS, ""},
MND(tab, METH_NOARGS)
MND(backspace, METH_NOARGS)
MND(linefeed, METH_NOARGS)
MND(carriage_return, METH_NOARGS)
MND(set_tab_stop, METH_NOARGS)
MND(clear_tab_stop, METH_VARARGS)
MND(reverse_index, METH_NOARGS)
MND(refresh_sprite_positions, METH_NOARGS)
MND(mark_as_dirty, METH_NOARGS)
MND(resize, METH_VARARGS)
MND(set_margins, METH_VARARGS)
MND(apply_selection, METH_VARARGS)
MND(selection_range_for_line, METH_VARARGS)
MND(selection_range_for_word, METH_VARARGS)
MND(text_for_selection, METH_NOARGS)
MND(clear_selection, METH_NOARGS)
MND(is_selection_in_progress, METH_NOARGS)
MND(is_selection_dirty, METH_NOARGS)
MND(start_selection, METH_VARARGS)
MND(update_selection, METH_VARARGS)
MND(scroll, METH_VARARGS)
MND(toggle_alt_screen, METH_NOARGS)
MND(reset_callbacks, METH_NOARGS)
{"update_cell_data", (PyCFunction)update_cell_data, METH_VARARGS, ""},
{"select_graphic_rendition", (PyCFunction)_select_graphic_rendition, METH_VARARGS, ""},
{NULL} /* Sentinel */
};
static PyGetSetDef getsetters[] = {
GETSET(in_bracketed_paste_mode)
GETSET(extended_keyboard)
GETSET(auto_repeat_enabled)
GETSET(focus_tracking_enabled)
GETSET(cursor_visible)
GETSET(cursor_key_mode)
{NULL} /* Sentinel */
};
#if UINT_MAX == UINT32_MAX
#define T_COL T_UINT
#elif ULONG_MAX == UINT32_MAX
#define T_COL T_ULONG
#else
#error Neither int nor long is 4-bytes in size
#endif
static PyMemberDef members[] = {
{"callbacks", T_OBJECT_EX, offsetof(Screen, callbacks), 0, "callbacks"},
{"cursor_changed", T_OBJECT, offsetof(Screen, cursor_changed), 0, "cursor_changed"},
{"scroll_changed", T_OBJECT, offsetof(Screen, scroll_changed), 0, "scroll_changed"},
{"is_dirty", T_OBJECT, offsetof(Screen, is_dirty), 0, "is_dirty"},
{"cursor", T_OBJECT_EX, offsetof(Screen, cursor), READONLY, "cursor"},
{"color_profile", T_OBJECT_EX, offsetof(Screen, color_profile), READONLY, "color_profile"},
{"linebuf", T_OBJECT_EX, offsetof(Screen, linebuf), READONLY, "linebuf"},
{"historybuf", T_OBJECT_EX, offsetof(Screen, historybuf), READONLY, "historybuf"},
{"scrolled_by", T_UINT, offsetof(Screen, scrolled_by), READONLY, "scrolled_by"},
{"lines", T_UINT, offsetof(Screen, lines), READONLY, "lines"},
{"columns", T_UINT, offsetof(Screen, columns), READONLY, "columns"},
{"margin_top", T_UINT, offsetof(Screen, margin_top), READONLY, "margin_top"},
{"margin_bottom", T_UINT, offsetof(Screen, margin_bottom), READONLY, "margin_bottom"},
{"history_line_added_count", T_UINT, offsetof(Screen, history_line_added_count), 0, "history_line_added_count"},
{NULL}
};
PyTypeObject Screen_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "fast_data_types.Screen",
.tp_basicsize = sizeof(Screen),
.tp_dealloc = (destructor)dealloc,
.tp_flags = Py_TPFLAGS_DEFAULT,
.tp_doc = "Screen",
.tp_methods = methods,
.tp_members = members,
.tp_new = new,
.tp_getset = getsetters,
};
INIT_TYPE(Screen)
// }}}
Reference in New Issue View Git Blame Copy Permalink